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1b10da25e2
openwrt-xburst/target/linux/generic/patches-2.6.36/511-yaffs-git-2010-10-01.patch
acoul 1b10da25e2 yaffs2: add preliminary 2.6.36 kernel support (sync to yaffs2 git tree). This code needs further testing especially for backwards compatibility. It boots on rb532 with 
kernel options: CONFIG_DEVTMPFS & CONFIG_DEVTMPFS_MOUNT


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23221 3c298f89-4303-0410-b956-a3cf2f4a3e73
2010-10-04 16:55:06 +00:00

23923 lines
650 KiB
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diff -Nrup a/fs/yaffs2/devextras.h b/fs/yaffs2/devextras.h
--- a/fs/yaffs2/devextras.h 2010-10-03 17:48:22.704000363 +0300
+++ b/fs/yaffs2/devextras.h 2010-10-03 18:03:47.537000367 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -24,6 +24,8 @@
#define __EXTRAS_H__
+#include "yportenv.h"
+
#if !(defined __KERNEL__)
/* Definition of types */
@@ -33,103 +35,6 @@ typedef unsigned __u32;
#endif
-/*
- * This is a simple doubly linked list implementation that matches the
- * way the Linux kernel doubly linked list implementation works.
- */
-
-struct ylist_head {
- struct ylist_head *next; /* next in chain */
- struct ylist_head *prev; /* previous in chain */
-};
-
-
-/* Initialise a static list */
-#define YLIST_HEAD(name) \
-struct ylist_head name = { &(name), &(name)}
-
-
-
-/* Initialise a list head to an empty list */
-#define YINIT_LIST_HEAD(p) \
-do { \
- (p)->next = (p);\
- (p)->prev = (p); \
-} while (0)
-
-
-/* Add an element to a list */
-static __inline__ void ylist_add(struct ylist_head *newEntry,
- struct ylist_head *list)
-{
- struct ylist_head *listNext = list->next;
-
- list->next = newEntry;
- newEntry->prev = list;
- newEntry->next = listNext;
- listNext->prev = newEntry;
-
-}
-
-static __inline__ void ylist_add_tail(struct ylist_head *newEntry,
- struct ylist_head *list)
-{
- struct ylist_head *listPrev = list->prev;
-
- list->prev = newEntry;
- newEntry->next = list;
- newEntry->prev = listPrev;
- listPrev->next = newEntry;
-
-}
-
-
-/* Take an element out of its current list, with or without
- * reinitialising the links.of the entry*/
-static __inline__ void ylist_del(struct ylist_head *entry)
-{
- struct ylist_head *listNext = entry->next;
- struct ylist_head *listPrev = entry->prev;
-
- listNext->prev = listPrev;
- listPrev->next = listNext;
-
-}
-
-static __inline__ void ylist_del_init(struct ylist_head *entry)
-{
- ylist_del(entry);
- entry->next = entry->prev = entry;
-}
-
-
-/* Test if the list is empty */
-static __inline__ int ylist_empty(struct ylist_head *entry)
-{
- return (entry->next == entry);
-}
-
-
-/* ylist_entry takes a pointer to a list entry and offsets it to that
- * we can find a pointer to the object it is embedded in.
- */
-
-
-#define ylist_entry(entry, type, member) \
- ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
-
-
-/* ylist_for_each and list_for_each_safe iterate over lists.
- * ylist_for_each_safe uses temporary storage to make the list delete safe
- */
-
-#define ylist_for_each(itervar, list) \
- for (itervar = (list)->next; itervar != (list); itervar = itervar->next)
-
-#define ylist_for_each_safe(itervar, saveVar, list) \
- for (itervar = (list)->next, saveVar = (list)->next->next; \
- itervar != (list); itervar = saveVar, saveVar = saveVar->next)
-
#if !(defined __KERNEL__)
diff -Nrup a/fs/yaffs2/Kconfig b/fs/yaffs2/Kconfig
--- a/fs/yaffs2/Kconfig 2010-10-03 17:48:22.704000363 +0300
+++ b/fs/yaffs2/Kconfig 2010-10-03 18:03:47.461000368 +0300
@@ -90,23 +90,15 @@ config YAFFS_AUTO_YAFFS2
If unsure, say Y.
-config YAFFS_DISABLE_LAZY_LOAD
- bool "Disable lazy loading"
- depends on YAFFS_YAFFS2
+config YAFFS_DISABLE_TAGS_ECC
+ bool "Disable YAFFS from doing ECC on tags by default"
+ depends on YAFFS_FS && YAFFS_YAFFS2
default n
help
- "Lazy loading" defers loading file details until they are
- required. This saves mount time, but makes the first look-up
- a bit longer.
-
- Lazy loading will only happen if enabled by this option being 'n'
- and if the appropriate tags are available, else yaffs2 will
- automatically fall back to immediate loading and do the right
- thing.
-
- Lazy laoding will be required by checkpointing.
-
- Setting this to 'y' will disable lazy loading.
+ This defaults Yaffs to using its own ECC calculations on tags instead of
+ just relying on the MTD.
+ This behavior can also be overridden with tags_ecc_on and
+ tags_ecc_off mount options.
If unsure, say N.
@@ -154,3 +146,45 @@ config YAFFS_SHORT_NAMES_IN_RAM
but makes look-ups faster.
If unsure, say Y.
+
+config YAFFS_EMPTY_LOST_AND_FOUND
+ bool "Empty lost and found on boot"
+ depends on YAFFS_FS
+ default n
+ help
+ If this is enabled then the contents of lost and found is
+ automatically dumped at mount.
+
+ If unsure, say N.
+
+config YAFFS_DISABLE_BLOCK_REFRESHING
+ bool "Disable yaffs2 block refreshing"
+ depends on YAFFS_FS
+ default n
+ help
+ If this is set, then block refreshing is disabled.
+ Block refreshing infrequently refreshes the oldest block in
+ a yaffs2 file system. This mechanism helps to refresh flash to
+ mitigate against data loss. This is particularly useful for MLC.
+
+ If unsure, say N.
+
+config YAFFS_DISABLE_BACKGROUND
+ bool "Disable yaffs2 background processing"
+ depends on YAFFS_FS
+ default n
+ help
+ If this is set, then background processing is disabled.
+ Background processing makes many foreground activities faster.
+
+ If unsure, say N.
+
+config YAFFS_XATTR
+ bool "Enable yaffs2 xattr support"
+ depends on YAFFS_FS
+ default y
+ help
+ If this is set then yaffs2 will provide xattr support.
+ If unsure, say Y.
+
+
diff -Nrup a/fs/yaffs2/Makefile b/fs/yaffs2/Makefile
--- a/fs/yaffs2/Makefile 2010-10-03 17:48:22.705000363 +0300
+++ b/fs/yaffs2/Makefile 2010-10-03 18:03:47.460000369 +0300
@@ -4,7 +4,14 @@
obj-$(CONFIG_YAFFS_FS) += yaffs.o
-yaffs-y := yaffs_ecc.o yaffs_fs.o yaffs_guts.o yaffs_checkptrw.o
-yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o
+yaffs-y := yaffs_ecc.o yaffs_vfs_glue.o yaffs_guts.o yaffs_checkptrw.o
+yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o
yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o
yaffs-y += yaffs_mtdif.o yaffs_mtdif1.o yaffs_mtdif2.o
+yaffs-y += yaffs_nameval.o
+yaffs-y += yaffs_allocator.o
+yaffs-y += yaffs_yaffs1.o
+yaffs-y += yaffs_yaffs2.o
+yaffs-y += yaffs_bitmap.o
+yaffs-y += yaffs_verify.o
+
diff -Nrup a/fs/yaffs2/moduleconfig.h b/fs/yaffs2/moduleconfig.h
--- a/fs/yaffs2/moduleconfig.h 2010-10-03 17:48:22.705000363 +0300
+++ b/fs/yaffs2/moduleconfig.h 2010-10-03 18:03:47.538000366 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Martin Fouts <Martin.Fouts@palmsource.com>
@@ -29,22 +29,43 @@
/* Meaning: Yaffs does its own ECC, rather than using MTD ECC */
/* #define CONFIG_YAFFS_DOES_ECC */
+/* Default: Selected */
+/* Meaning: Yaffs does its own ECC on tags for packed tags rather than use mtd */
+#define CONFIG_YAFFS_DOES_TAGS_ECC
+
/* Default: Not selected */
/* Meaning: ECC byte order is 'wrong'. Only meaningful if */
/* CONFIG_YAFFS_DOES_ECC is set */
/* #define CONFIG_YAFFS_ECC_WRONG_ORDER */
-/* Default: Selected */
-/* Meaning: Disables testing whether chunks are erased before writing to them*/
-#define CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
+/* Default: Not selected */
+/* Meaning: Always test whether chunks are erased before writing to them.
+ Use during mtd debugging and init. */
+/* #define CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED */
+
+/* Default: Not Selected */
+/* Meaning: At mount automatically empty all files from lost and found. */
+/* This is done to fix an old problem where rmdir was not checking for an */
+/* empty directory. This can also be achieved with a mount option. */
+#define CONFIG_YAFFS_EMPTY_LOST_AND_FOUND
/* Default: Selected */
/* Meaning: Cache short names, taking more RAM, but faster look-ups */
#define CONFIG_YAFFS_SHORT_NAMES_IN_RAM
-/* Default: 10 */
-/* Meaning: set the count of blocks to reserve for checkpointing */
-#define CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS 10
+/* Default: Unselected */
+/* Meaning: Select to disable block refreshing. */
+/* Block Refreshing periodically rewrites the oldest block. */
+/* #define CONFIG_DISABLE_BLOCK_REFRESHING */
+
+/* Default: Unselected */
+/* Meaning: Select to disable background processing */
+/* #define CONFIG_DISABLE_BACKGROUND */
+
+
+/* Default: Selected */
+/* Meaning: Enable XATTR support */
+#define CONFIG_YAFFS_XATTR
/*
Older-style on-NAND data format has a "pageStatus" byte to record
diff -Nrup a/fs/yaffs2/yaffs_allocator.c b/fs/yaffs2/yaffs_allocator.c
--- a/fs/yaffs2/yaffs_allocator.c 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_allocator.c 2010-10-03 18:03:47.504000356 +0300
@@ -0,0 +1,409 @@
+/*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
+
+#include "yaffs_allocator.h"
+#include "yaffs_guts.h"
+#include "yaffs_trace.h"
+#include "yportenv.h"
+
+#ifdef CONFIG_YAFFS_YMALLOC_ALLOCATOR
+
+void yaffs_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev)
+{
+ dev = dev;
+}
+
+void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev)
+{
+ dev = dev;
+}
+
+yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev)
+{
+ return (yaffs_Tnode *)YMALLOC(dev->tnodeSize);
+}
+
+void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn)
+{
+ dev = dev;
+ YFREE(tn);
+}
+
+void yaffs_InitialiseRawObjects(yaffs_Device *dev)
+{
+ dev = dev;
+}
+
+void yaffs_DeinitialiseRawObjects(yaffs_Device *dev)
+{
+ dev = dev;
+}
+
+yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev)
+{
+ dev = dev;
+ return (yaffs_Object *) YMALLOC(sizeof(yaffs_Object));
+}
+
+
+void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *obj)
+{
+
+ dev = dev;
+ YFREE(obj);
+}
+
+#else
+
+struct yaffs_TnodeList_struct {
+ struct yaffs_TnodeList_struct *next;
+ yaffs_Tnode *tnodes;
+};
+
+typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
+
+struct yaffs_ObjectList_struct {
+ yaffs_Object *objects;
+ struct yaffs_ObjectList_struct *next;
+};
+
+typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
+
+
+struct yaffs_AllocatorStruct {
+ int nTnodesCreated;
+ yaffs_Tnode *freeTnodes;
+ int nFreeTnodes;
+ yaffs_TnodeList *allocatedTnodeList;
+
+ int nObjectsCreated;
+ yaffs_Object *freeObjects;
+ int nFreeObjects;
+
+ yaffs_ObjectList *allocatedObjectList;
+};
+
+typedef struct yaffs_AllocatorStruct yaffs_Allocator;
+
+
+static void yaffs_DeinitialiseRawTnodes(yaffs_Device *dev)
+{
+
+ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
+
+ yaffs_TnodeList *tmp;
+
+ if(!allocator){
+ YBUG();
+ return;
+ }
+
+ while (allocator->allocatedTnodeList) {
+ tmp = allocator->allocatedTnodeList->next;
+
+ YFREE(allocator->allocatedTnodeList->tnodes);
+ YFREE(allocator->allocatedTnodeList);
+ allocator->allocatedTnodeList = tmp;
+
+ }
+
+ allocator->freeTnodes = NULL;
+ allocator->nFreeTnodes = 0;
+ allocator->nTnodesCreated = 0;
+}
+
+static void yaffs_InitialiseRawTnodes(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(allocator){
+ allocator->allocatedTnodeList = NULL;
+ allocator->freeTnodes = NULL;
+ allocator->nFreeTnodes = 0;
+ allocator->nTnodesCreated = 0;
+ } else
+ YBUG();
+}
+
+static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
+{
+ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
+ int i;
+ yaffs_Tnode *newTnodes;
+ __u8 *mem;
+ yaffs_Tnode *curr;
+ yaffs_Tnode *next;
+ yaffs_TnodeList *tnl;
+
+ if(!allocator){
+ YBUG();
+ return YAFFS_FAIL;
+ }
+
+ if (nTnodes < 1)
+ return YAFFS_OK;
+
+
+ /* make these things */
+
+ newTnodes = YMALLOC(nTnodes * dev->tnodeSize);
+ mem = (__u8 *)newTnodes;
+
+ if (!newTnodes) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
+ return YAFFS_FAIL;
+ }
+
+ /* New hookup for wide tnodes */
+ for (i = 0; i < nTnodes - 1; i++) {
+ curr = (yaffs_Tnode *) &mem[i * dev->tnodeSize];
+ next = (yaffs_Tnode *) &mem[(i+1) * dev->tnodeSize];
+ curr->internal[0] = next;
+ }
+
+ curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * dev->tnodeSize];
+ curr->internal[0] = allocator->freeTnodes;
+ allocator->freeTnodes = (yaffs_Tnode *)mem;
+
+ allocator->nFreeTnodes += nTnodes;
+ allocator->nTnodesCreated += nTnodes;
+
+ /* Now add this bunch of tnodes to a list for freeing up.
+ * NB If we can't add this to the management list it isn't fatal
+ * but it just means we can't free this bunch of tnodes later.
+ */
+
+ tnl = YMALLOC(sizeof(yaffs_TnodeList));
+ if (!tnl) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs: Could not add tnodes to management list" TENDSTR)));
+ return YAFFS_FAIL;
+ } else {
+ tnl->tnodes = newTnodes;
+ tnl->next = allocator->allocatedTnodeList;
+ allocator->allocatedTnodeList = tnl;
+ }
+
+ T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
+
+ return YAFFS_OK;
+}
+
+
+yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
+ yaffs_Tnode *tn = NULL;
+
+ if(!allocator){
+ YBUG();
+ return NULL;
+ }
+
+ /* If there are none left make more */
+ if (!allocator->freeTnodes)
+ yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
+
+ if (allocator->freeTnodes) {
+ tn = allocator->freeTnodes;
+ allocator->freeTnodes = allocator->freeTnodes->internal[0];
+ allocator->nFreeTnodes--;
+ }
+
+ return tn;
+}
+
+/* FreeTnode frees up a tnode and puts it back on the free list */
+void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(!allocator){
+ YBUG();
+ return;
+ }
+
+ if (tn) {
+ tn->internal[0] = allocator->freeTnodes;
+ allocator->freeTnodes = tn;
+ allocator->nFreeTnodes++;
+ }
+ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+}
+
+
+
+static void yaffs_InitialiseRawObjects(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(allocator) {
+ allocator->allocatedObjectList = NULL;
+ allocator->freeObjects = NULL;
+ allocator->nFreeObjects = 0;
+ } else
+ YBUG();
+}
+
+static void yaffs_DeinitialiseRawObjects(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+ yaffs_ObjectList *tmp;
+
+ if(!allocator){
+ YBUG();
+ return;
+ }
+
+ while (allocator->allocatedObjectList) {
+ tmp = allocator->allocatedObjectList->next;
+ YFREE(allocator->allocatedObjectList->objects);
+ YFREE(allocator->allocatedObjectList);
+
+ allocator->allocatedObjectList = tmp;
+ }
+
+ allocator->freeObjects = NULL;
+ allocator->nFreeObjects = 0;
+ allocator->nObjectsCreated = 0;
+}
+
+
+static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+
+ int i;
+ yaffs_Object *newObjects;
+ yaffs_ObjectList *list;
+
+ if(!allocator){
+ YBUG();
+ return YAFFS_FAIL;
+ }
+
+ if (nObjects < 1)
+ return YAFFS_OK;
+
+ /* make these things */
+ newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
+ list = YMALLOC(sizeof(yaffs_ObjectList));
+
+ if (!newObjects || !list) {
+ if (newObjects){
+ YFREE(newObjects);
+ newObjects = NULL;
+ }
+ if (list){
+ YFREE(list);
+ list = NULL;
+ }
+ T(YAFFS_TRACE_ALLOCATE,
+ (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
+ return YAFFS_FAIL;
+ }
+
+ /* Hook them into the free list */
+ for (i = 0; i < nObjects - 1; i++) {
+ newObjects[i].siblings.next =
+ (struct ylist_head *)(&newObjects[i + 1]);
+ }
+
+ newObjects[nObjects - 1].siblings.next = (void *)allocator->freeObjects;
+ allocator->freeObjects = newObjects;
+ allocator->nFreeObjects += nObjects;
+ allocator->nObjectsCreated += nObjects;
+
+ /* Now add this bunch of Objects to a list for freeing up. */
+
+ list->objects = newObjects;
+ list->next = allocator->allocatedObjectList;
+ allocator->allocatedObjectList = list;
+
+ return YAFFS_OK;
+}
+
+yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev)
+{
+ yaffs_Object *obj = NULL;
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(!allocator) {
+ YBUG();
+ return obj;
+ }
+
+ /* If there are none left make more */
+ if (!allocator->freeObjects)
+ yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
+
+ if (allocator->freeObjects) {
+ obj = allocator->freeObjects;
+ allocator->freeObjects =
+ (yaffs_Object *) (allocator->freeObjects->siblings.next);
+ allocator->nFreeObjects--;
+ }
+
+ return obj;
+}
+
+
+void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *obj)
+{
+
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(!allocator)
+ YBUG();
+ else {
+ /* Link into the free list. */
+ obj->siblings.next = (struct ylist_head *)(allocator->freeObjects);
+ allocator->freeObjects = obj;
+ allocator->nFreeObjects++;
+ }
+}
+
+void yaffs_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev)
+{
+ if(dev->allocator){
+ yaffs_DeinitialiseRawTnodes(dev);
+ yaffs_DeinitialiseRawObjects(dev);
+
+ YFREE(dev->allocator);
+ dev->allocator=NULL;
+ } else
+ YBUG();
+}
+
+void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator;
+
+ if(!dev->allocator){
+ allocator = YMALLOC(sizeof(yaffs_Allocator));
+ if(allocator){
+ dev->allocator = allocator;
+ yaffs_InitialiseRawTnodes(dev);
+ yaffs_InitialiseRawObjects(dev);
+ }
+ } else
+ YBUG();
+}
+
+
+#endif
diff -Nrup a/fs/yaffs2/yaffs_allocator.h b/fs/yaffs2/yaffs_allocator.h
--- a/fs/yaffs2/yaffs_allocator.h 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_allocator.h 2010-10-03 18:03:47.538000366 +0300
@@ -0,0 +1,30 @@
+/*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
+#ifndef __YAFFS_ALLOCATOR_H__
+#define __YAFFS_ALLOCATOR_H__
+
+#include "yaffs_guts.h"
+
+void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev);
+void yaffs_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev);
+
+yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev);
+void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn);
+
+yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev);
+void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *obj);
+
+#endif
diff -Nrup a/fs/yaffs2/yaffs_bitmap.c b/fs/yaffs2/yaffs_bitmap.c
--- a/fs/yaffs2/yaffs_bitmap.c 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_bitmap.c 2010-10-03 18:03:47.505000364 +0300
@@ -0,0 +1,105 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include "yaffs_bitmap.h"
+#include "yaffs_trace.h"
+/*
+ * Chunk bitmap manipulations
+ */
+
+static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
+{
+ if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
+ blk));
+ YBUG();
+ }
+ return dev->chunkBits +
+ (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
+}
+
+void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
+{
+ if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
+ chunk < 0 || chunk >= dev->param.nChunksPerBlock) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
+ blk, chunk));
+ YBUG();
+ }
+}
+
+void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
+{
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
+
+ memset(blkBits, 0, dev->chunkBitmapStride);
+}
+
+void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
+{
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
+
+ yaffs_VerifyChunkBitId(dev, blk, chunk);
+
+ blkBits[chunk / 8] &= ~(1 << (chunk & 7));
+}
+
+void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk)
+{
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
+
+ yaffs_VerifyChunkBitId(dev, blk, chunk);
+
+ blkBits[chunk / 8] |= (1 << (chunk & 7));
+}
+
+int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
+{
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
+ yaffs_VerifyChunkBitId(dev, blk, chunk);
+
+ return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
+}
+
+int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
+{
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
+ int i;
+ for (i = 0; i < dev->chunkBitmapStride; i++) {
+ if (*blkBits)
+ return 1;
+ blkBits++;
+ }
+ return 0;
+}
+
+int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
+{
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
+ int i;
+ int n = 0;
+ for (i = 0; i < dev->chunkBitmapStride; i++) {
+ __u8 x = *blkBits;
+ while (x) {
+ if (x & 1)
+ n++;
+ x >>= 1;
+ }
+
+ blkBits++;
+ }
+ return n;
+}
+
diff -Nrup a/fs/yaffs2/yaffs_bitmap.h b/fs/yaffs2/yaffs_bitmap.h
--- a/fs/yaffs2/yaffs_bitmap.h 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_bitmap.h 2010-10-03 18:03:47.539000363 +0300
@@ -0,0 +1,31 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * Chunk bitmap manipulations
+ */
+
+#ifndef __YAFFS_BITMAP_H__
+#define __YAFFS_BITMAP_H__
+
+#include "yaffs_guts.h"
+
+void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk);
+void yaffs_ClearChunkBits(yaffs_Device *dev, int blk);
+void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk);
+void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk);
+int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk);
+int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk);
+int yaffs_CountChunkBits(yaffs_Device *dev, int blk);
+
+#endif
diff -Nrup a/fs/yaffs2/yaffs_checkptrw.c b/fs/yaffs2/yaffs_checkptrw.c
--- a/fs/yaffs2/yaffs_checkptrw.c 2010-10-03 17:48:22.706000363 +0300
+++ b/fs/yaffs2/yaffs_checkptrw.c 2010-10-03 18:03:47.505000364 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -11,16 +11,12 @@
* published by the Free Software Foundation.
*/
-const char *yaffs_checkptrw_c_version =
- "$Id: yaffs_checkptrw.c,v 1.18 2009-03-06 17:20:49 wookey Exp $";
-
-
#include "yaffs_checkptrw.h"
#include "yaffs_getblockinfo.h"
-static int yaffs_CheckpointSpaceOk(yaffs_Device *dev)
+static int yaffs2_CheckpointSpaceOk(yaffs_Device *dev)
{
- int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
+ int blocksAvailable = dev->nErasedBlocks - dev->param.nReservedBlocks;
T(YAFFS_TRACE_CHECKPOINT,
(TSTR("checkpt blocks available = %d" TENDSTR),
@@ -30,11 +26,11 @@ static int yaffs_CheckpointSpaceOk(yaffs
}
-static int yaffs_CheckpointErase(yaffs_Device *dev)
+static int yaffs2_CheckpointErase(yaffs_Device *dev)
{
int i;
- if (!dev->eraseBlockInNAND)
+ if (!dev->param.eraseBlockInNAND)
return 0;
T(YAFFS_TRACE_CHECKPOINT, (TSTR("checking blocks %d to %d"TENDSTR),
dev->internalStartBlock, dev->internalEndBlock));
@@ -43,12 +39,15 @@ static int yaffs_CheckpointErase(yaffs_D
yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) {
T(YAFFS_TRACE_CHECKPOINT, (TSTR("erasing checkpt block %d"TENDSTR), i));
- if (dev->eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) {
+
+ dev->nBlockErasures++;
+
+ if (dev->param.eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) {
bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
dev->nErasedBlocks++;
- dev->nFreeChunks += dev->nChunksPerBlock;
+ dev->nFreeChunks += dev->param.nChunksPerBlock;
} else {
- dev->markNANDBlockBad(dev, i);
+ dev->param.markNANDBlockBad(dev, i);
bi->blockState = YAFFS_BLOCK_STATE_DEAD;
}
}
@@ -60,13 +59,13 @@ static int yaffs_CheckpointErase(yaffs_D
}
-static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev)
+static void yaffs2_CheckpointFindNextErasedBlock(yaffs_Device *dev)
{
int i;
- int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
+ int blocksAvailable = dev->nErasedBlocks - dev->param.nReservedBlocks;
T(YAFFS_TRACE_CHECKPOINT,
(TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR),
- dev->nErasedBlocks, dev->nReservedBlocks, blocksAvailable, dev->checkpointNextBlock));
+ dev->nErasedBlocks, dev->param.nReservedBlocks, blocksAvailable, dev->checkpointNextBlock));
if (dev->checkpointNextBlock >= 0 &&
dev->checkpointNextBlock <= dev->internalEndBlock &&
@@ -88,7 +87,7 @@ static void yaffs_CheckpointFindNextEras
dev->checkpointCurrentBlock = -1;
}
-static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
+static void yaffs2_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
{
int i;
yaffs_ExtendedTags tags;
@@ -98,10 +97,10 @@ static void yaffs_CheckpointFindNextChec
if (dev->blocksInCheckpoint < dev->checkpointMaxBlocks)
for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
- int chunk = i * dev->nChunksPerBlock;
+ int chunk = i * dev->param.nChunksPerBlock;
int realignedChunk = chunk - dev->chunkOffset;
- dev->readChunkWithTagsFromNAND(dev, realignedChunk,
+ dev->param.readChunkWithTagsFromNAND(dev, realignedChunk,
NULL, &tags);
T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR),
i, tags.objectId, tags.sequenceNumber, tags.eccResult));
@@ -124,29 +123,29 @@ static void yaffs_CheckpointFindNextChec
}
-int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting)
+int yaffs2_CheckpointOpen(yaffs_Device *dev, int forWriting)
{
+
+ dev->checkpointOpenForWrite = forWriting;
+
/* Got the functions we need? */
- if (!dev->writeChunkWithTagsToNAND ||
- !dev->readChunkWithTagsFromNAND ||
- !dev->eraseBlockInNAND ||
- !dev->markNANDBlockBad)
+ if (!dev->param.writeChunkWithTagsToNAND ||
+ !dev->param.readChunkWithTagsFromNAND ||
+ !dev->param.eraseBlockInNAND ||
+ !dev->param.markNANDBlockBad)
return 0;
- if (forWriting && !yaffs_CheckpointSpaceOk(dev))
+ if (forWriting && !yaffs2_CheckpointSpaceOk(dev))
return 0;
if (!dev->checkpointBuffer)
- dev->checkpointBuffer = YMALLOC_DMA(dev->totalBytesPerChunk);
+ dev->checkpointBuffer = YMALLOC_DMA(dev->param.totalBytesPerChunk);
if (!dev->checkpointBuffer)
return 0;
dev->checkpointPageSequence = 0;
-
- dev->checkpointOpenForWrite = forWriting;
-
dev->checkpointByteCount = 0;
dev->checkpointSum = 0;
dev->checkpointXor = 0;
@@ -158,7 +157,7 @@ int yaffs_CheckpointOpen(yaffs_Device *d
if (forWriting) {
memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
dev->checkpointByteOffset = 0;
- return yaffs_CheckpointErase(dev);
+ return yaffs2_CheckpointErase(dev);
} else {
int i;
/* Set to a value that will kick off a read */
@@ -168,6 +167,9 @@ int yaffs_CheckpointOpen(yaffs_Device *d
dev->blocksInCheckpoint = 0;
dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2;
dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks);
+ if(!dev->checkpointBlockList)
+ return 0;
+
for (i = 0; i < dev->checkpointMaxBlocks; i++)
dev->checkpointBlockList[i] = -1;
}
@@ -175,7 +177,7 @@ int yaffs_CheckpointOpen(yaffs_Device *d
return 1;
}
-int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
+int yaffs2_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
{
__u32 compositeSum;
compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF);
@@ -183,7 +185,7 @@ int yaffs_GetCheckpointSum(yaffs_Device
return 1;
}
-static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
+static int yaffs2_CheckpointFlushBuffer(yaffs_Device *dev)
{
int chunk;
int realignedChunk;
@@ -191,7 +193,7 @@ static int yaffs_CheckpointFlushBuffer(y
yaffs_ExtendedTags tags;
if (dev->checkpointCurrentBlock < 0) {
- yaffs_CheckpointFindNextErasedBlock(dev);
+ yaffs2_CheckpointFindNextErasedBlock(dev);
dev->checkpointCurrentChunk = 0;
}
@@ -211,7 +213,7 @@ static int yaffs_CheckpointFlushBuffer(y
dev->blocksInCheckpoint++;
}
- chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk;
+ chunk = dev->checkpointCurrentBlock * dev->param.nChunksPerBlock + dev->checkpointCurrentChunk;
T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR),
@@ -219,12 +221,14 @@ static int yaffs_CheckpointFlushBuffer(y
realignedChunk = chunk - dev->chunkOffset;
- dev->writeChunkWithTagsToNAND(dev, realignedChunk,
+ dev->nPageWrites++;
+
+ dev->param.writeChunkWithTagsToNAND(dev, realignedChunk,
dev->checkpointBuffer, &tags);
dev->checkpointByteOffset = 0;
dev->checkpointPageSequence++;
dev->checkpointCurrentChunk++;
- if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock) {
+ if (dev->checkpointCurrentChunk >= dev->param.nChunksPerBlock) {
dev->checkpointCurrentChunk = 0;
dev->checkpointCurrentBlock = -1;
}
@@ -234,7 +238,7 @@ static int yaffs_CheckpointFlushBuffer(y
}
-int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes)
+int yaffs2_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes)
{
int i = 0;
int ok = 1;
@@ -263,13 +267,13 @@ int yaffs_CheckpointWrite(yaffs_Device *
if (dev->checkpointByteOffset < 0 ||
dev->checkpointByteOffset >= dev->nDataBytesPerChunk)
- ok = yaffs_CheckpointFlushBuffer(dev);
+ ok = yaffs2_CheckpointFlushBuffer(dev);
}
return i;
}
-int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
+int yaffs2_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
{
int i = 0;
int ok = 1;
@@ -294,7 +298,7 @@ int yaffs_CheckpointRead(yaffs_Device *d
dev->checkpointByteOffset >= dev->nDataBytesPerChunk) {
if (dev->checkpointCurrentBlock < 0) {
- yaffs_CheckpointFindNextCheckpointBlock(dev);
+ yaffs2_CheckpointFindNextCheckpointBlock(dev);
dev->checkpointCurrentChunk = 0;
}
@@ -302,14 +306,16 @@ int yaffs_CheckpointRead(yaffs_Device *d
ok = 0;
else {
chunk = dev->checkpointCurrentBlock *
- dev->nChunksPerBlock +
+ dev->param.nChunksPerBlock +
dev->checkpointCurrentChunk;
realignedChunk = chunk - dev->chunkOffset;
+
+ dev->nPageReads++;
/* read in the next chunk */
/* printf("read checkpoint page %d\n",dev->checkpointPage); */
- dev->readChunkWithTagsFromNAND(dev,
+ dev->param.readChunkWithTagsFromNAND(dev,
realignedChunk,
dev->checkpointBuffer,
&tags);
@@ -323,7 +329,7 @@ int yaffs_CheckpointRead(yaffs_Device *d
dev->checkpointPageSequence++;
dev->checkpointCurrentChunk++;
- if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock)
+ if (dev->checkpointCurrentChunk >= dev->param.nChunksPerBlock)
dev->checkpointCurrentBlock = -1;
}
}
@@ -342,17 +348,20 @@ int yaffs_CheckpointRead(yaffs_Device *d
return i;
}
-int yaffs_CheckpointClose(yaffs_Device *dev)
+int yaffs2_CheckpointClose(yaffs_Device *dev)
{
if (dev->checkpointOpenForWrite) {
if (dev->checkpointByteOffset != 0)
- yaffs_CheckpointFlushBuffer(dev);
- } else {
+ yaffs2_CheckpointFlushBuffer(dev);
+ } else if(dev->checkpointBlockList){
int i;
for (i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++) {
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointBlockList[i]);
- if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
+ int blk = dev->checkpointBlockList[i];
+ yaffs_BlockInfo *bi = NULL;
+ if( dev->internalStartBlock <= blk && blk <= dev->internalEndBlock)
+ bi = yaffs_GetBlockInfo(dev, blk);
+ if (bi && bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
else {
/* Todo this looks odd... */
@@ -362,7 +371,7 @@ int yaffs_CheckpointClose(yaffs_Device *
dev->checkpointBlockList = NULL;
}
- dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock;
+ dev->nFreeChunks -= dev->blocksInCheckpoint * dev->param.nChunksPerBlock;
dev->nErasedBlocks -= dev->blocksInCheckpoint;
@@ -378,16 +387,14 @@ int yaffs_CheckpointClose(yaffs_Device *
return 0;
}
-int yaffs_CheckpointInvalidateStream(yaffs_Device *dev)
+int yaffs2_CheckpointInvalidateStream(yaffs_Device *dev)
{
- /* Erase the first checksum block */
-
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate"TENDSTR)));
+ /* Erase the checkpoint data */
- if (!yaffs_CheckpointSpaceOk(dev))
- return 0;
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate of %d blocks"TENDSTR),
+ dev->blocksInCheckpoint));
- return yaffs_CheckpointErase(dev);
+ return yaffs2_CheckpointErase(dev);
}
diff -Nrup a/fs/yaffs2/yaffs_checkptrw.h b/fs/yaffs2/yaffs_checkptrw.h
--- a/fs/yaffs2/yaffs_checkptrw.h 2010-10-03 17:48:22.706000363 +0300
+++ b/fs/yaffs2/yaffs_checkptrw.h 2010-10-03 18:03:47.540000359 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -18,18 +18,17 @@
#include "yaffs_guts.h"
-int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting);
+int yaffs2_CheckpointOpen(yaffs_Device *dev, int forWriting);
-int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes);
+int yaffs2_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes);
-int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes);
+int yaffs2_CheckpointRead(yaffs_Device *dev, void *data, int nBytes);
-int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum);
+int yaffs2_GetCheckpointSum(yaffs_Device *dev, __u32 *sum);
-int yaffs_CheckpointClose(yaffs_Device *dev);
+int yaffs2_CheckpointClose(yaffs_Device *dev);
-int yaffs_CheckpointInvalidateStream(yaffs_Device *dev);
+int yaffs2_CheckpointInvalidateStream(yaffs_Device *dev);
#endif
-
diff -Nrup a/fs/yaffs2/yaffs_ecc.c b/fs/yaffs2/yaffs_ecc.c
--- a/fs/yaffs2/yaffs_ecc.c 2010-10-03 17:48:22.706000363 +0300
+++ b/fs/yaffs2/yaffs_ecc.c 2010-10-03 18:03:47.509000373 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -28,9 +28,6 @@
* this bytes influence on the line parity.
*/
-const char *yaffs_ecc_c_version =
- "$Id: yaffs_ecc.c,v 1.11 2009-03-06 17:20:50 wookey Exp $";
-
#include "yportenv.h"
#include "yaffs_ecc.h"
diff -Nrup a/fs/yaffs2/yaffs_ecc.h b/fs/yaffs2/yaffs_ecc.h
--- a/fs/yaffs2/yaffs_ecc.h 2010-10-03 17:48:22.707000363 +0300
+++ b/fs/yaffs2/yaffs_ecc.h 2010-10-03 18:03:47.541000359 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
diff -Nrup a/fs/yaffs2/yaffs_fs.c b/fs/yaffs2/yaffs_fs.c
--- a/fs/yaffs2/yaffs_fs.c 2010-10-03 17:48:22.708000363 +0300
+++ b/fs/yaffs2/yaffs_fs.c 1970-01-01 02:00:00.000000000 +0200
@@ -1,2529 +0,0 @@
-/*
- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
- *
- * Copyright (C) 2002-2009 Aleph One Ltd.
- * for Toby Churchill Ltd and Brightstar Engineering
- *
- * Created by Charles Manning <charles@aleph1.co.uk>
- * Acknowledgements:
- * Luc van OostenRyck for numerous patches.
- * Nick Bane for numerous patches.
- * Nick Bane for 2.5/2.6 integration.
- * Andras Toth for mknod rdev issue.
- * Michael Fischer for finding the problem with inode inconsistency.
- * Some code bodily lifted from JFFS
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-/*
- *
- * This is the file system front-end to YAFFS that hooks it up to
- * the VFS.
- *
- * Special notes:
- * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
- * this superblock
- * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
- * superblock
- * >> inode->u.generic_ip points to the associated yaffs_Object.
- */
-
-const char *yaffs_fs_c_version =
- "$Id: yaffs_fs.c,v 1.79 2009-03-17 01:12:00 wookey Exp $";
-extern const char *yaffs_guts_c_version;
-
-#include <linux/version.h>
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
-#include <linux/config.h>
-#endif
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/proc_fs.h>
-#include <linux/smp_lock.h>
-#include <linux/pagemap.h>
-#include <linux/mtd/mtd.h>
-#include <linux/interrupt.h>
-#include <linux/string.h>
-#include <linux/ctype.h>
-
-#include "asm/div64.h"
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-
-#include <linux/statfs.h> /* Added NCB 15-8-2003 */
-#include <linux/statfs.h>
-#define UnlockPage(p) unlock_page(p)
-#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
-
-/* FIXME: use sb->s_id instead ? */
-#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
-
-#else
-
-#include <linux/locks.h>
-#define BDEVNAME_SIZE 0
-#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
-/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
-#define __user
-#endif
-
-#endif
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
-#define YPROC_ROOT (&proc_root)
-#else
-#define YPROC_ROOT NULL
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-#define WRITE_SIZE_STR "writesize"
-#define WRITE_SIZE(mtd) ((mtd)->writesize)
-#else
-#define WRITE_SIZE_STR "oobblock"
-#define WRITE_SIZE(mtd) ((mtd)->oobblock)
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
-#define YAFFS_USE_WRITE_BEGIN_END 1
-#else
-#define YAFFS_USE_WRITE_BEGIN_END 0
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
-static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
-{
- uint64_t result = partition_size;
- do_div(result, block_size);
- return (uint32_t)result;
-}
-#else
-#define YCALCBLOCKS(s, b) ((s)/(b))
-#endif
-
-#include <linux/uaccess.h>
-
-#include "yportenv.h"
-#include "yaffs_guts.h"
-
-#include <linux/mtd/mtd.h>
-#include "yaffs_mtdif.h"
-#include "yaffs_mtdif1.h"
-#include "yaffs_mtdif2.h"
-
-unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
-unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
-unsigned int yaffs_auto_checkpoint = 1;
-
-/* Module Parameters */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-module_param(yaffs_traceMask, uint, 0644);
-module_param(yaffs_wr_attempts, uint, 0644);
-module_param(yaffs_auto_checkpoint, uint, 0644);
-#else
-MODULE_PARM(yaffs_traceMask, "i");
-MODULE_PARM(yaffs_wr_attempts, "i");
-MODULE_PARM(yaffs_auto_checkpoint, "i");
-#endif
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
-/* use iget and read_inode */
-#define Y_IGET(sb, inum) iget((sb), (inum))
-static void yaffs_read_inode(struct inode *inode);
-
-#else
-/* Call local equivalent */
-#define YAFFS_USE_OWN_IGET
-#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
-
-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
-#endif
-
-/*#define T(x) printk x */
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
-#define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private)
-#else
-#define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip)
-#endif
-
-#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
-#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
-#else
-#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
-#endif
-
-static void yaffs_put_super(struct super_block *sb);
-
-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
- loff_t *pos);
-static ssize_t yaffs_hold_space(struct file *f);
-static void yaffs_release_space(struct file *f);
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_file_flush(struct file *file, fl_owner_t id);
-#else
-static int yaffs_file_flush(struct file *file);
-#endif
-
-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
- int datasync);
-
-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *n);
-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *n);
-#else
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
-#endif
-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *dentry);
-static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
- const char *symname);
-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- dev_t dev);
-#else
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- int dev);
-#endif
-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry);
-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_sync_fs(struct super_block *sb, int wait);
-static void yaffs_write_super(struct super_block *sb);
-#else
-static int yaffs_sync_fs(struct super_block *sb);
-static int yaffs_write_super(struct super_block *sb);
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
-#else
-static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
-#endif
-
-#ifdef YAFFS_HAS_PUT_INODE
-static void yaffs_put_inode(struct inode *inode);
-#endif
-
-static void yaffs_delete_inode(struct inode *);
-static void yaffs_clear_inode(struct inode *);
-
-static int yaffs_readpage(struct file *file, struct page *page);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
-#else
-static int yaffs_writepage(struct page *page);
-#endif
-
-
-#if (YAFFS_USE_WRITE_BEGIN_END != 0)
-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata);
-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *pg, void *fsdadata);
-#else
-static int yaffs_prepare_write(struct file *f, struct page *pg,
- unsigned offset, unsigned to);
-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
- unsigned to);
-
-#endif
-
-static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
- int buflen);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
-#else
-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
-#endif
-
-static struct address_space_operations yaffs_file_address_operations = {
- .readpage = yaffs_readpage,
- .writepage = yaffs_writepage,
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
- .write_begin = yaffs_write_begin,
- .write_end = yaffs_write_end,
-#else
- .prepare_write = yaffs_prepare_write,
- .commit_write = yaffs_commit_write,
-#endif
-};
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
-static const struct file_operations yaffs_file_operations = {
- .read = do_sync_read,
- .write = do_sync_write,
- .aio_read = generic_file_aio_read,
- .aio_write = generic_file_aio_write,
- .mmap = generic_file_mmap,
- .flush = yaffs_file_flush,
- .fsync = yaffs_sync_object,
- .splice_read = generic_file_splice_read,
- .splice_write = generic_file_splice_write,
- .llseek = generic_file_llseek,
-};
-
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
-
-static const struct file_operations yaffs_file_operations = {
- .read = do_sync_read,
- .write = do_sync_write,
- .aio_read = generic_file_aio_read,
- .aio_write = generic_file_aio_write,
- .mmap = generic_file_mmap,
- .flush = yaffs_file_flush,
- .fsync = yaffs_sync_object,
- .sendfile = generic_file_sendfile,
-};
-
-#else
-
-static const struct file_operations yaffs_file_operations = {
- .read = generic_file_read,
- .write = generic_file_write,
- .mmap = generic_file_mmap,
- .flush = yaffs_file_flush,
- .fsync = yaffs_sync_object,
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- .sendfile = generic_file_sendfile,
-#endif
-};
-#endif
-
-static const struct inode_operations yaffs_file_inode_operations = {
- .setattr = yaffs_setattr,
-};
-
-static const struct inode_operations yaffs_symlink_inode_operations = {
- .readlink = yaffs_readlink,
- .follow_link = yaffs_follow_link,
- .setattr = yaffs_setattr,
-};
-
-static const struct inode_operations yaffs_dir_inode_operations = {
- .create = yaffs_create,
- .lookup = yaffs_lookup,
- .link = yaffs_link,
- .unlink = yaffs_unlink,
- .symlink = yaffs_symlink,
- .mkdir = yaffs_mkdir,
- .rmdir = yaffs_unlink,
- .mknod = yaffs_mknod,
- .rename = yaffs_rename,
- .setattr = yaffs_setattr,
-};
-
-static const struct file_operations yaffs_dir_operations = {
- .read = generic_read_dir,
- .readdir = yaffs_readdir,
- .fsync = yaffs_sync_object,
-};
-
-static const struct super_operations yaffs_super_ops = {
- .statfs = yaffs_statfs,
-
-#ifndef YAFFS_USE_OWN_IGET
- .read_inode = yaffs_read_inode,
-#endif
-#ifdef YAFFS_HAS_PUT_INODE
- .put_inode = yaffs_put_inode,
-#endif
- .put_super = yaffs_put_super,
- .delete_inode = yaffs_delete_inode,
- .clear_inode = yaffs_clear_inode,
- .sync_fs = yaffs_sync_fs,
- .write_super = yaffs_write_super,
-};
-
-static void yaffs_GrossLock(yaffs_Device *dev)
-{
- T(YAFFS_TRACE_OS, ("yaffs locking %p\n", current));
- down(&dev->grossLock);
- T(YAFFS_TRACE_OS, ("yaffs locked %p\n", current));
-}
-
-static void yaffs_GrossUnlock(yaffs_Device *dev)
-{
- T(YAFFS_TRACE_OS, ("yaffs unlocking %p\n", current));
- up(&dev->grossLock);
-}
-
-static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
- int buflen)
-{
- unsigned char *alias;
- int ret;
-
- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
-
- yaffs_GrossLock(dev);
-
- alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
-
- yaffs_GrossUnlock(dev);
-
- if (!alias)
- return -ENOMEM;
-
- ret = vfs_readlink(dentry, buffer, buflen, alias);
- kfree(alias);
- return ret;
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-#else
-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
-#endif
-{
- unsigned char *alias;
- int ret;
- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
-
- yaffs_GrossLock(dev);
-
- alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
-
- yaffs_GrossUnlock(dev);
-
- if (!alias) {
- ret = -ENOMEM;
- goto out;
- }
-
- ret = vfs_follow_link(nd, alias);
- kfree(alias);
-out:
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
- return ERR_PTR(ret);
-#else
- return ret;
-#endif
-}
-
-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
- yaffs_Object *obj);
-
-/*
- * Lookup is used to find objects in the fs
- */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-
-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *n)
-#else
-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
-#endif
-{
- yaffs_Object *obj;
- struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
-
- yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
-
- yaffs_GrossLock(dev);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_lookup for %d:%s\n",
- yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
-
- obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),
- dentry->d_name.name);
-
- obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
-
- /* Can't hold gross lock when calling yaffs_get_inode() */
- yaffs_GrossUnlock(dev);
-
- if (obj) {
- T(YAFFS_TRACE_OS,
- ("yaffs_lookup found %d\n", obj->objectId));
-
- inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
-
- if (inode) {
- T(YAFFS_TRACE_OS,
- ("yaffs_loookup dentry \n"));
-/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
- * d_add even if NULL inode */
-#if 0
- /*dget(dentry); // try to solve directory bug */
- d_add(dentry, inode);
-
- /* return dentry; */
- return NULL;
-#endif
- }
-
- } else {
- T(YAFFS_TRACE_OS, ("yaffs_lookup not found\n"));
-
- }
-
-/* added NCB for 2.5/6 compatability - forces add even if inode is
- * NULL which creates dentry hash */
- d_add(dentry, inode);
-
- return NULL;
-}
-
-
-#ifdef YAFFS_HAS_PUT_INODE
-
-/* For now put inode is just for debugging
- * Put inode is called when the inode **structure** is put.
- */
-static void yaffs_put_inode(struct inode *inode)
-{
- T(YAFFS_TRACE_OS,
- ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
- atomic_read(&inode->i_count)));
-
-}
-#endif
-
-/* clear is called to tell the fs to release any per-inode data it holds */
-static void yaffs_clear_inode(struct inode *inode)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
-
- obj = yaffs_InodeToObject(inode);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
- atomic_read(&inode->i_count),
- obj ? "object exists" : "null object"));
-
- if (obj) {
- dev = obj->myDev;
- yaffs_GrossLock(dev);
-
- /* Clear the association between the inode and
- * the yaffs_Object.
- */
- obj->myInode = NULL;
- yaffs_InodeToObjectLV(inode) = NULL;
-
- /* If the object freeing was deferred, then the real
- * free happens now.
- * This should fix the inode inconsistency problem.
- */
-
- yaffs_HandleDeferedFree(obj);
-
- yaffs_GrossUnlock(dev);
- }
-
-}
-
-/* delete is called when the link count is zero and the inode
- * is put (ie. nobody wants to know about it anymore, time to
- * delete the file).
- * NB Must call clear_inode()
- */
-static void yaffs_delete_inode(struct inode *inode)
-{
- yaffs_Object *obj = yaffs_InodeToObject(inode);
- yaffs_Device *dev;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
- atomic_read(&inode->i_count),
- obj ? "object exists" : "null object"));
-
- if (obj) {
- dev = obj->myDev;
- yaffs_GrossLock(dev);
- yaffs_DeleteObject(obj);
- yaffs_GrossUnlock(dev);
- }
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
- truncate_inode_pages(&inode->i_data, 0);
-#endif
- clear_inode(inode);
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_file_flush(struct file *file, fl_owner_t id)
-#else
-static int yaffs_file_flush(struct file *file)
-#endif
-{
- yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
-
- yaffs_Device *dev = obj->myDev;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_file_flush object %d (%s)\n", obj->objectId,
- obj->dirty ? "dirty" : "clean"));
-
- yaffs_GrossLock(dev);
-
- yaffs_FlushFile(obj, 1);
-
- yaffs_GrossUnlock(dev);
-
- return 0;
-}
-
-static int yaffs_readpage_nolock(struct file *f, struct page *pg)
-{
- /* Lifted from jffs2 */
-
- yaffs_Object *obj;
- unsigned char *pg_buf;
- int ret;
-
- yaffs_Device *dev;
-
- T(YAFFS_TRACE_OS, ("yaffs_readpage at %08x, size %08x\n",
- (unsigned)(pg->index << PAGE_CACHE_SHIFT),
- (unsigned)PAGE_CACHE_SIZE));
-
- obj = yaffs_DentryToObject(f->f_dentry);
-
- dev = obj->myDev;
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- BUG_ON(!PageLocked(pg));
-#else
- if (!PageLocked(pg))
- PAGE_BUG(pg);
-#endif
-
- pg_buf = kmap(pg);
- /* FIXME: Can kmap fail? */
-
- yaffs_GrossLock(dev);
-
- ret = yaffs_ReadDataFromFile(obj, pg_buf,
- pg->index << PAGE_CACHE_SHIFT,
- PAGE_CACHE_SIZE);
-
- yaffs_GrossUnlock(dev);
-
- if (ret >= 0)
- ret = 0;
-
- if (ret) {
- ClearPageUptodate(pg);
- SetPageError(pg);
- } else {
- SetPageUptodate(pg);
- ClearPageError(pg);
- }
-
- flush_dcache_page(pg);
- kunmap(pg);
-
- T(YAFFS_TRACE_OS, ("yaffs_readpage done\n"));
- return ret;
-}
-
-static int yaffs_readpage_unlock(struct file *f, struct page *pg)
-{
- int ret = yaffs_readpage_nolock(f, pg);
- UnlockPage(pg);
- return ret;
-}
-
-static int yaffs_readpage(struct file *f, struct page *pg)
-{
- return yaffs_readpage_unlock(f, pg);
-}
-
-/* writepage inspired by/stolen from smbfs */
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
-#else
-static int yaffs_writepage(struct page *page)
-#endif
-{
- struct address_space *mapping = page->mapping;
- loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
- struct inode *inode;
- unsigned long end_index;
- char *buffer;
- yaffs_Object *obj;
- int nWritten = 0;
- unsigned nBytes;
-
- if (!mapping)
- BUG();
- inode = mapping->host;
- if (!inode)
- BUG();
-
- if (offset > inode->i_size) {
- T(YAFFS_TRACE_OS,
- ("yaffs_writepage at %08x, inode size = %08x!!!\n",
- (unsigned)(page->index << PAGE_CACHE_SHIFT),
- (unsigned)inode->i_size));
- T(YAFFS_TRACE_OS,
- (" -> don't care!!\n"));
- unlock_page(page);
- return 0;
- }
-
- end_index = inode->i_size >> PAGE_CACHE_SHIFT;
-
- /* easy case */
- if (page->index < end_index)
- nBytes = PAGE_CACHE_SIZE;
- else
- nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
-
- get_page(page);
-
- buffer = kmap(page);
-
- obj = yaffs_InodeToObject(inode);
- yaffs_GrossLock(obj->myDev);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_writepage at %08x, size %08x\n",
- (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
- T(YAFFS_TRACE_OS,
- ("writepag0: obj = %05x, ino = %05x\n",
- (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
-
- nWritten = yaffs_WriteDataToFile(obj, buffer,
- page->index << PAGE_CACHE_SHIFT, nBytes, 0);
-
- T(YAFFS_TRACE_OS,
- ("writepag1: obj = %05x, ino = %05x\n",
- (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
-
- yaffs_GrossUnlock(obj->myDev);
-
- kunmap(page);
- SetPageUptodate(page);
- UnlockPage(page);
- put_page(page);
-
- return (nWritten == nBytes) ? 0 : -ENOSPC;
-}
-
-
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata)
-{
- struct page *pg = NULL;
- pgoff_t index = pos >> PAGE_CACHE_SHIFT;
- uint32_t offset = pos & (PAGE_CACHE_SIZE - 1);
- uint32_t to = offset + len;
-
- int ret = 0;
- int space_held = 0;
-
- T(YAFFS_TRACE_OS, ("start yaffs_write_begin\n"));
- /* Get a page */
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28)
- pg = grab_cache_page_write_begin(mapping, index, flags);
-#else
- pg = __grab_cache_page(mapping, index);
-#endif
-
- *pagep = pg;
- if (!pg) {
- ret = -ENOMEM;
- goto out;
- }
- /* Get fs space */
- space_held = yaffs_hold_space(filp);
-
- if (!space_held) {
- ret = -ENOSPC;
- goto out;
- }
-
- /* Update page if required */
-
- if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
- ret = yaffs_readpage_nolock(filp, pg);
-
- if (ret)
- goto out;
-
- /* Happy path return */
- T(YAFFS_TRACE_OS, ("end yaffs_write_begin - ok\n"));
-
- return 0;
-
-out:
- T(YAFFS_TRACE_OS, ("end yaffs_write_begin fail returning %d\n", ret));
- if (space_held)
- yaffs_release_space(filp);
- if (pg) {
- unlock_page(pg);
- page_cache_release(pg);
- }
- return ret;
-}
-
-#else
-
-static int yaffs_prepare_write(struct file *f, struct page *pg,
- unsigned offset, unsigned to)
-{
- T(YAFFS_TRACE_OS, ("yaffs_prepair_write\n"));
-
- if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
- return yaffs_readpage_nolock(f, pg);
- return 0;
-}
-#endif
-
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *pg, void *fsdadata)
-{
- int ret = 0;
- void *addr, *kva;
- uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
-
- kva = kmap(pg);
- addr = kva + offset_into_page;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_write_end addr %x pos %x nBytes %d\n",
- (unsigned) addr,
- (int)pos, copied));
-
- ret = yaffs_file_write(filp, addr, copied, &pos);
-
- if (ret != copied) {
- T(YAFFS_TRACE_OS,
- ("yaffs_write_end not same size ret %d copied %d\n",
- ret, copied));
- SetPageError(pg);
- ClearPageUptodate(pg);
- } else {
- SetPageUptodate(pg);
- }
-
- kunmap(pg);
-
- yaffs_release_space(filp);
- unlock_page(pg);
- page_cache_release(pg);
- return ret;
-}
-#else
-
-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
- unsigned to)
-{
- void *addr, *kva;
-
- loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
- int nBytes = to - offset;
- int nWritten;
-
- unsigned spos = pos;
- unsigned saddr;
-
- kva = kmap(pg);
- addr = kva + offset;
-
- saddr = (unsigned) addr;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_commit_write addr %x pos %x nBytes %d\n",
- saddr, spos, nBytes));
-
- nWritten = yaffs_file_write(f, addr, nBytes, &pos);
-
- if (nWritten != nBytes) {
- T(YAFFS_TRACE_OS,
- ("yaffs_commit_write not same size nWritten %d nBytes %d\n",
- nWritten, nBytes));
- SetPageError(pg);
- ClearPageUptodate(pg);
- } else {
- SetPageUptodate(pg);
- }
-
- kunmap(pg);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_commit_write returning %d\n",
- nWritten == nBytes ? 0 : nWritten));
-
- return nWritten == nBytes ? 0 : nWritten;
-}
-#endif
-
-
-static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
-{
- if (inode && obj) {
-
-
- /* Check mode against the variant type and attempt to repair if broken. */
- __u32 mode = obj->yst_mode;
- switch (obj->variantType) {
- case YAFFS_OBJECT_TYPE_FILE:
- if (!S_ISREG(mode)) {
- obj->yst_mode &= ~S_IFMT;
- obj->yst_mode |= S_IFREG;
- }
-
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- if (!S_ISLNK(mode)) {
- obj->yst_mode &= ~S_IFMT;
- obj->yst_mode |= S_IFLNK;
- }
-
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- if (!S_ISDIR(mode)) {
- obj->yst_mode &= ~S_IFMT;
- obj->yst_mode |= S_IFDIR;
- }
-
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- case YAFFS_OBJECT_TYPE_HARDLINK:
- case YAFFS_OBJECT_TYPE_SPECIAL:
- default:
- /* TODO? */
- break;
- }
-
- inode->i_flags |= S_NOATIME;
-
- inode->i_ino = obj->objectId;
- inode->i_mode = obj->yst_mode;
- inode->i_uid = obj->yst_uid;
- inode->i_gid = obj->yst_gid;
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
- inode->i_blksize = inode->i_sb->s_blocksize;
-#endif
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-
- inode->i_rdev = old_decode_dev(obj->yst_rdev);
- inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
- inode->i_atime.tv_nsec = 0;
- inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
- inode->i_mtime.tv_nsec = 0;
- inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
- inode->i_ctime.tv_nsec = 0;
-#else
- inode->i_rdev = obj->yst_rdev;
- inode->i_atime = obj->yst_atime;
- inode->i_mtime = obj->yst_mtime;
- inode->i_ctime = obj->yst_ctime;
-#endif
- inode->i_size = yaffs_GetObjectFileLength(obj);
- inode->i_blocks = (inode->i_size + 511) >> 9;
-
- inode->i_nlink = yaffs_GetObjectLinkCount(obj);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
- inode->i_mode, inode->i_uid, inode->i_gid,
- (int)inode->i_size, atomic_read(&inode->i_count)));
-
- switch (obj->yst_mode & S_IFMT) {
- default: /* fifo, device or socket */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- init_special_inode(inode, obj->yst_mode,
- old_decode_dev(obj->yst_rdev));
-#else
- init_special_inode(inode, obj->yst_mode,
- (dev_t) (obj->yst_rdev));
-#endif
- break;
- case S_IFREG: /* file */
- inode->i_op = &yaffs_file_inode_operations;
- inode->i_fop = &yaffs_file_operations;
- inode->i_mapping->a_ops =
- &yaffs_file_address_operations;
- break;
- case S_IFDIR: /* directory */
- inode->i_op = &yaffs_dir_inode_operations;
- inode->i_fop = &yaffs_dir_operations;
- break;
- case S_IFLNK: /* symlink */
- inode->i_op = &yaffs_symlink_inode_operations;
- break;
- }
-
- yaffs_InodeToObjectLV(inode) = obj;
-
- obj->myInode = inode;
-
- } else {
- T(YAFFS_TRACE_OS,
- ("yaffs_FileInode invalid parameters\n"));
- }
-
-}
-
-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
- yaffs_Object *obj)
-{
- struct inode *inode;
-
- if (!sb) {
- T(YAFFS_TRACE_OS,
- ("yaffs_get_inode for NULL super_block!!\n"));
- return NULL;
-
- }
-
- if (!obj) {
- T(YAFFS_TRACE_OS,
- ("yaffs_get_inode for NULL object!!\n"));
- return NULL;
-
- }
-
- T(YAFFS_TRACE_OS,
- ("yaffs_get_inode for object %d\n", obj->objectId));
-
- inode = Y_IGET(sb, obj->objectId);
- if (IS_ERR(inode))
- return NULL;
-
- /* NB Side effect: iget calls back to yaffs_read_inode(). */
- /* iget also increments the inode's i_count */
- /* NB You can't be holding grossLock or deadlock will happen! */
-
- return inode;
-}
-
-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
- loff_t *pos)
-{
- yaffs_Object *obj;
- int nWritten, ipos;
- struct inode *inode;
- yaffs_Device *dev;
-
- obj = yaffs_DentryToObject(f->f_dentry);
-
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
- inode = f->f_dentry->d_inode;
-
- if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
- ipos = inode->i_size;
- else
- ipos = *pos;
-
- if (!obj)
- T(YAFFS_TRACE_OS,
- ("yaffs_file_write: hey obj is null!\n"));
- else
- T(YAFFS_TRACE_OS,
- ("yaffs_file_write about to write writing %zu bytes"
- "to object %d at %d\n",
- n, obj->objectId, ipos));
-
- nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_file_write writing %zu bytes, %d written at %d\n",
- n, nWritten, ipos));
-
- if (nWritten > 0) {
- ipos += nWritten;
- *pos = ipos;
- if (ipos > inode->i_size) {
- inode->i_size = ipos;
- inode->i_blocks = (ipos + 511) >> 9;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_file_write size updated to %d bytes, "
- "%d blocks\n",
- ipos, (int)(inode->i_blocks)));
- }
-
- }
- yaffs_GrossUnlock(dev);
- return nWritten == 0 ? -ENOSPC : nWritten;
-}
-
-/* Space holding and freeing is done to ensure we have space available for write_begin/end */
-/* For now we just assume few parallel writes and check against a small number. */
-/* Todo: need to do this with a counter to handle parallel reads better */
-
-static ssize_t yaffs_hold_space(struct file *f)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
-
- int nFreeChunks;
-
-
- obj = yaffs_DentryToObject(f->f_dentry);
-
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
- nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
-
- yaffs_GrossUnlock(dev);
-
- return (nFreeChunks > 20) ? 1 : 0;
-}
-
-static void yaffs_release_space(struct file *f)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
-
-
- obj = yaffs_DentryToObject(f->f_dentry);
-
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
-
- yaffs_GrossUnlock(dev);
-}
-
-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
- struct inode *inode = f->f_dentry->d_inode;
- unsigned long offset, curoffs;
- struct ylist_head *i;
- yaffs_Object *l;
-
- char name[YAFFS_MAX_NAME_LENGTH + 1];
-
- obj = yaffs_DentryToObject(f->f_dentry);
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
- offset = f->f_pos;
-
- T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset));
-
- if (offset == 0) {
- T(YAFFS_TRACE_OS,
- ("yaffs_readdir: entry . ino %d \n",
- (int)inode->i_ino));
- if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0)
- goto out;
- offset++;
- f->f_pos++;
- }
- if (offset == 1) {
- T(YAFFS_TRACE_OS,
- ("yaffs_readdir: entry .. ino %d \n",
- (int)f->f_dentry->d_parent->d_inode->i_ino));
- if (filldir(dirent, "..", 2, offset,
- f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0)
- goto out;
- offset++;
- f->f_pos++;
- }
-
- curoffs = 1;
-
- /* If the directory has changed since the open or last call to
- readdir, rewind to after the 2 canned entries. */
-
- if (f->f_version != inode->i_version) {
- offset = 2;
- f->f_pos = offset;
- f->f_version = inode->i_version;
- }
-
- ylist_for_each(i, &obj->variant.directoryVariant.children) {
- curoffs++;
- if (curoffs >= offset) {
- l = ylist_entry(i, yaffs_Object, siblings);
-
- yaffs_GetObjectName(l, name,
- YAFFS_MAX_NAME_LENGTH + 1);
- T(YAFFS_TRACE_OS,
- ("yaffs_readdir: %s inode %d\n", name,
- yaffs_GetObjectInode(l)));
-
- if (filldir(dirent,
- name,
- strlen(name),
- offset,
- yaffs_GetObjectInode(l),
- yaffs_GetObjectType(l)) < 0)
- goto up_and_out;
-
- offset++;
- f->f_pos++;
- }
- }
-
-up_and_out:
-out:
- yaffs_GrossUnlock(dev);
-
- return 0;
-}
-
-/*
- * File creation. Allocate an inode, and we're done..
- */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
-#define YCRED(x) x
-#else
-#define YCRED(x) (x->cred)
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- dev_t rdev)
-#else
-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
- int rdev)
-#endif
-{
- struct inode *inode;
-
- yaffs_Object *obj = NULL;
- yaffs_Device *dev;
-
- yaffs_Object *parent = yaffs_InodeToObject(dir);
-
- int error = -ENOSPC;
- uid_t uid = YCRED(current)->fsuid;
- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
-
- if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
- mode |= S_ISGID;
-
- if (parent) {
- T(YAFFS_TRACE_OS,
- ("yaffs_mknod: parent object %d type %d\n",
- parent->objectId, parent->variantType));
- } else {
- T(YAFFS_TRACE_OS,
- ("yaffs_mknod: could not get parent object\n"));
- return -EPERM;
- }
-
- T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
- "mode %x dev %x\n",
- dentry->d_name.name, mode, rdev));
-
- dev = parent->myDev;
-
- yaffs_GrossLock(dev);
-
- switch (mode & S_IFMT) {
- default:
- /* Special (socket, fifo, device...) */
- T(YAFFS_TRACE_OS, ("yaffs_mknod: making special\n"));
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
- gid, old_encode_dev(rdev));
-#else
- obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
- gid, rdev);
-#endif
- break;
- case S_IFREG: /* file */
- T(YAFFS_TRACE_OS, ("yaffs_mknod: making file\n"));
- obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
- gid);
- break;
- case S_IFDIR: /* directory */
- T(YAFFS_TRACE_OS,
- ("yaffs_mknod: making directory\n"));
- obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
- uid, gid);
- break;
- case S_IFLNK: /* symlink */
- T(YAFFS_TRACE_OS, ("yaffs_mknod: making symlink\n"));
- obj = NULL; /* Do we ever get here? */
- break;
- }
-
- /* Can not call yaffs_get_inode() with gross lock held */
- yaffs_GrossUnlock(dev);
-
- if (obj) {
- inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
- d_instantiate(dentry, inode);
- T(YAFFS_TRACE_OS,
- ("yaffs_mknod created object %d count = %d\n",
- obj->objectId, atomic_read(&inode->i_count)));
- error = 0;
- } else {
- T(YAFFS_TRACE_OS,
- ("yaffs_mknod failed making object\n"));
- error = -ENOMEM;
- }
-
- return error;
-}
-
-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-{
- int retVal;
- T(YAFFS_TRACE_OS, ("yaffs_mkdir\n"));
- retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
- return retVal;
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *n)
-#else
-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
-#endif
-{
- T(YAFFS_TRACE_OS, ("yaffs_create\n"));
- return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
-}
-
-static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
-{
- int retVal;
-
- yaffs_Device *dev;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_unlink %d:%s\n", (int)(dir->i_ino),
- dentry->d_name.name));
-
- dev = yaffs_InodeToObject(dir)->myDev;
-
- yaffs_GrossLock(dev);
-
- retVal = yaffs_Unlink(yaffs_InodeToObject(dir), dentry->d_name.name);
-
- if (retVal == YAFFS_OK) {
- dentry->d_inode->i_nlink--;
- dir->i_version++;
- yaffs_GrossUnlock(dev);
- mark_inode_dirty(dentry->d_inode);
- return 0;
- }
- yaffs_GrossUnlock(dev);
- return -ENOTEMPTY;
-}
-
-/*
- * Create a link...
- */
-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *dentry)
-{
- struct inode *inode = old_dentry->d_inode;
- yaffs_Object *obj = NULL;
- yaffs_Object *link = NULL;
- yaffs_Device *dev;
-
- T(YAFFS_TRACE_OS, ("yaffs_link\n"));
-
- obj = yaffs_InodeToObject(inode);
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
- if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
- link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
- obj);
-
- if (link) {
- old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
- d_instantiate(dentry, old_dentry->d_inode);
- atomic_inc(&old_dentry->d_inode->i_count);
- T(YAFFS_TRACE_OS,
- ("yaffs_link link count %d i_count %d\n",
- old_dentry->d_inode->i_nlink,
- atomic_read(&old_dentry->d_inode->i_count)));
- }
-
- yaffs_GrossUnlock(dev);
-
- if (link)
- return 0;
-
- return -EPERM;
-}
-
-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
- const char *symname)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
- uid_t uid = YCRED(current)->fsuid;
- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
-
- T(YAFFS_TRACE_OS, ("yaffs_symlink\n"));
-
- dev = yaffs_InodeToObject(dir)->myDev;
- yaffs_GrossLock(dev);
- obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
- S_IFLNK | S_IRWXUGO, uid, gid, symname);
- yaffs_GrossUnlock(dev);
-
- if (obj) {
- struct inode *inode;
-
- inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
- d_instantiate(dentry, inode);
- T(YAFFS_TRACE_OS, ("symlink created OK\n"));
- return 0;
- } else {
- T(YAFFS_TRACE_OS, ("symlink not created\n"));
- }
-
- return -ENOMEM;
-}
-
-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
- int datasync)
-{
-
- yaffs_Object *obj;
- yaffs_Device *dev;
-
- obj = yaffs_DentryToObject(dentry);
-
- dev = obj->myDev;
-
- T(YAFFS_TRACE_OS, ("yaffs_sync_object\n"));
- yaffs_GrossLock(dev);
- yaffs_FlushFile(obj, 1);
- yaffs_GrossUnlock(dev);
- return 0;
-}
-
-/*
- * The VFS layer already does all the dentry stuff for rename.
- *
- * NB: POSIX says you can rename an object over an old object of the same name
- */
-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry)
-{
- yaffs_Device *dev;
- int retVal = YAFFS_FAIL;
- yaffs_Object *target;
-
- T(YAFFS_TRACE_OS, ("yaffs_rename\n"));
- dev = yaffs_InodeToObject(old_dir)->myDev;
-
- yaffs_GrossLock(dev);
-
- /* Check if the target is an existing directory that is not empty. */
- target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
- new_dentry->d_name.name);
-
-
-
- if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
- !ylist_empty(&target->variant.directoryVariant.children)) {
-
- T(YAFFS_TRACE_OS, ("target is non-empty dir\n"));
-
- retVal = YAFFS_FAIL;
- } else {
- /* Now does unlinking internally using shadowing mechanism */
- T(YAFFS_TRACE_OS, ("calling yaffs_RenameObject\n"));
-
- retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),
- old_dentry->d_name.name,
- yaffs_InodeToObject(new_dir),
- new_dentry->d_name.name);
- }
- yaffs_GrossUnlock(dev);
-
- if (retVal == YAFFS_OK) {
- if (target) {
- new_dentry->d_inode->i_nlink--;
- mark_inode_dirty(new_dentry->d_inode);
- }
-
- return 0;
- } else {
- return -ENOTEMPTY;
- }
-}
-
-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
-{
- struct inode *inode = dentry->d_inode;
- int error;
- yaffs_Device *dev;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_setattr of object %d\n",
- yaffs_InodeToObject(inode)->objectId));
-
- error = inode_change_ok(inode, attr);
- if (error == 0) {
- dev = yaffs_InodeToObject(inode)->myDev;
- yaffs_GrossLock(dev);
- if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) ==
- YAFFS_OK) {
- error = 0;
- } else {
- error = -EPERM;
- }
- yaffs_GrossUnlock(dev);
- if (!error)
- error = inode_setattr(inode, attr);
- }
- return error;
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
-{
- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
- struct super_block *sb = dentry->d_sb;
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
-{
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
-#else
-static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
-{
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
-#endif
-
- T(YAFFS_TRACE_OS, ("yaffs_statfs\n"));
-
- yaffs_GrossLock(dev);
-
- buf->f_type = YAFFS_MAGIC;
- buf->f_bsize = sb->s_blocksize;
- buf->f_namelen = 255;
-
- if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) {
- /* Do this if chunk size is not a power of 2 */
-
- uint64_t bytesInDev;
- uint64_t bytesFree;
-
- bytesInDev = ((uint64_t)((dev->endBlock - dev->startBlock + 1))) *
- ((uint64_t)(dev->nChunksPerBlock * dev->nDataBytesPerChunk));
-
- do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
- buf->f_blocks = bytesInDev;
-
- bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
- ((uint64_t)(dev->nDataBytesPerChunk));
-
- do_div(bytesFree, sb->s_blocksize);
-
- buf->f_bfree = bytesFree;
-
- } else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
-
- buf->f_blocks =
- (dev->endBlock - dev->startBlock + 1) *
- dev->nChunksPerBlock /
- (sb->s_blocksize / dev->nDataBytesPerChunk);
- buf->f_bfree =
- yaffs_GetNumberOfFreeChunks(dev) /
- (sb->s_blocksize / dev->nDataBytesPerChunk);
- } else {
- buf->f_blocks =
- (dev->endBlock - dev->startBlock + 1) *
- dev->nChunksPerBlock *
- (dev->nDataBytesPerChunk / sb->s_blocksize);
-
- buf->f_bfree =
- yaffs_GetNumberOfFreeChunks(dev) *
- (dev->nDataBytesPerChunk / sb->s_blocksize);
- }
-
- buf->f_files = 0;
- buf->f_ffree = 0;
- buf->f_bavail = buf->f_bfree;
-
- yaffs_GrossUnlock(dev);
- return 0;
-}
-
-
-static int yaffs_do_sync_fs(struct super_block *sb)
-{
-
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
- T(YAFFS_TRACE_OS, ("yaffs_do_sync_fs\n"));
-
- if (sb->s_dirt) {
- yaffs_GrossLock(dev);
-
- if (dev) {
- yaffs_FlushEntireDeviceCache(dev);
- yaffs_CheckpointSave(dev);
- }
-
- yaffs_GrossUnlock(dev);
-
- sb->s_dirt = 0;
- }
- return 0;
-}
-
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static void yaffs_write_super(struct super_block *sb)
-#else
-static int yaffs_write_super(struct super_block *sb)
-#endif
-{
-
- T(YAFFS_TRACE_OS, ("yaffs_write_super\n"));
- if (yaffs_auto_checkpoint >= 2)
- yaffs_do_sync_fs(sb);
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
- return 0;
-#endif
-}
-
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_sync_fs(struct super_block *sb, int wait)
-#else
-static int yaffs_sync_fs(struct super_block *sb)
-#endif
-{
- T(YAFFS_TRACE_OS, ("yaffs_sync_fs\n"));
-
- if (yaffs_auto_checkpoint >= 1)
- yaffs_do_sync_fs(sb);
-
- return 0;
-}
-
-#ifdef YAFFS_USE_OWN_IGET
-
-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
-{
- struct inode *inode;
- yaffs_Object *obj;
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_iget for %lu\n", ino));
-
- inode = iget_locked(sb, ino);
- if (!inode)
- return ERR_PTR(-ENOMEM);
- if (!(inode->i_state & I_NEW))
- return inode;
-
- /* NB This is called as a side effect of other functions, but
- * we had to release the lock to prevent deadlocks, so
- * need to lock again.
- */
-
- yaffs_GrossLock(dev);
-
- obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
-
- yaffs_FillInodeFromObject(inode, obj);
-
- yaffs_GrossUnlock(dev);
-
- unlock_new_inode(inode);
- return inode;
-}
-
-#else
-
-static void yaffs_read_inode(struct inode *inode)
-{
- /* NB This is called as a side effect of other functions, but
- * we had to release the lock to prevent deadlocks, so
- * need to lock again.
- */
-
- yaffs_Object *obj;
- yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_read_inode for %d\n", (int)inode->i_ino));
-
- yaffs_GrossLock(dev);
-
- obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
-
- yaffs_FillInodeFromObject(inode, obj);
-
- yaffs_GrossUnlock(dev);
-}
-
-#endif
-
-static YLIST_HEAD(yaffs_dev_list);
-
-#if 0 /* not used */
-static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
-{
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
-
- if (*flags & MS_RDONLY) {
- struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_remount_fs: %s: RO\n", dev->name));
-
- yaffs_GrossLock(dev);
-
- yaffs_FlushEntireDeviceCache(dev);
-
- yaffs_CheckpointSave(dev);
-
- if (mtd->sync)
- mtd->sync(mtd);
-
- yaffs_GrossUnlock(dev);
- } else {
- T(YAFFS_TRACE_OS,
- ("yaffs_remount_fs: %s: RW\n", dev->name));
- }
-
- return 0;
-}
-#endif
-
-static void yaffs_put_super(struct super_block *sb)
-{
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
-
- T(YAFFS_TRACE_OS, ("yaffs_put_super\n"));
-
- yaffs_GrossLock(dev);
-
- yaffs_FlushEntireDeviceCache(dev);
-
- yaffs_CheckpointSave(dev);
-
- if (dev->putSuperFunc)
- dev->putSuperFunc(sb);
-
- yaffs_Deinitialise(dev);
-
- yaffs_GrossUnlock(dev);
-
- /* we assume this is protected by lock_kernel() in mount/umount */
- ylist_del(&dev->devList);
-
- if (dev->spareBuffer) {
- YFREE(dev->spareBuffer);
- dev->spareBuffer = NULL;
- }
-
- kfree(dev);
-}
-
-
-static void yaffs_MTDPutSuper(struct super_block *sb)
-{
- struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
-
- if (mtd->sync)
- mtd->sync(mtd);
-
- put_mtd_device(mtd);
-}
-
-
-static void yaffs_MarkSuperBlockDirty(void *vsb)
-{
- struct super_block *sb = (struct super_block *)vsb;
-
- T(YAFFS_TRACE_OS, ("yaffs_MarkSuperBlockDirty() sb = %p\n", sb));
- if (sb)
- sb->s_dirt = 1;
-}
-
-typedef struct {
- int inband_tags;
- int skip_checkpoint_read;
- int skip_checkpoint_write;
- int no_cache;
-} yaffs_options;
-
-#define MAX_OPT_LEN 20
-static int yaffs_parse_options(yaffs_options *options, const char *options_str)
-{
- char cur_opt[MAX_OPT_LEN + 1];
- int p;
- int error = 0;
-
- /* Parse through the options which is a comma seperated list */
-
- while (options_str && *options_str && !error) {
- memset(cur_opt, 0, MAX_OPT_LEN + 1);
- p = 0;
-
- while (*options_str && *options_str != ',') {
- if (p < MAX_OPT_LEN) {
- cur_opt[p] = *options_str;
- p++;
- }
- options_str++;
- }
-
- if (!strcmp(cur_opt, "inband-tags"))
- options->inband_tags = 1;
- else if (!strcmp(cur_opt, "no-cache"))
- options->no_cache = 1;
- else if (!strcmp(cur_opt, "no-checkpoint-read"))
- options->skip_checkpoint_read = 1;
- else if (!strcmp(cur_opt, "no-checkpoint-write"))
- options->skip_checkpoint_write = 1;
- else if (!strcmp(cur_opt, "no-checkpoint")) {
- options->skip_checkpoint_read = 1;
- options->skip_checkpoint_write = 1;
- } else {
- printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
- cur_opt);
- error = 1;
- }
- }
-
- return error;
-}
-
-static struct super_block *yaffs_internal_read_super(int yaffsVersion,
- struct super_block *sb,
- void *data, int silent)
-{
- int nBlocks;
- struct inode *inode = NULL;
- struct dentry *root;
- yaffs_Device *dev = 0;
- char devname_buf[BDEVNAME_SIZE + 1];
- struct mtd_info *mtd;
- int err;
- char *data_str = (char *)data;
-
- yaffs_options options;
-
- sb->s_magic = YAFFS_MAGIC;
- sb->s_op = &yaffs_super_ops;
- sb->s_flags |= MS_NOATIME;
-
- if (!sb)
- printk(KERN_INFO "yaffs: sb is NULL\n");
- else if (!sb->s_dev)
- printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
- else if (!yaffs_devname(sb, devname_buf))
- printk(KERN_INFO "yaffs: devname is NULL\n");
- else
- printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
- sb->s_dev,
- yaffs_devname(sb, devname_buf));
-
- if (!data_str)
- data_str = "";
-
- printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
-
- memset(&options, 0, sizeof(options));
-
- if (yaffs_parse_options(&options, data_str)) {
- /* Option parsing failed */
- return NULL;
- }
-
-
- sb->s_blocksize = PAGE_CACHE_SIZE;
- sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
- T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
- T(YAFFS_TRACE_OS,
- ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize)));
-
-#ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
- T(YAFFS_TRACE_OS,
- ("yaffs: Write verification disabled. All guarantees "
- "null and void\n"));
-#endif
-
- T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
- "\"%s\"\n",
- MAJOR(sb->s_dev), MINOR(sb->s_dev),
- yaffs_devname(sb, devname_buf)));
-
- /* Check it's an mtd device..... */
- if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
- return NULL; /* This isn't an mtd device */
-
- /* Get the device */
- mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
- if (!mtd) {
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs: MTD device #%u doesn't appear to exist\n",
- MINOR(sb->s_dev)));
- return NULL;
- }
- /* Check it's NAND */
- if (mtd->type != MTD_NANDFLASH) {
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
- return NULL;
- }
-
- T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase));
- T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
- T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
- T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
- T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
- T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
- T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
- T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
- T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
- T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
- T(YAFFS_TRACE_OS, (" size %u\n", mtd->size));
-#else
- T(YAFFS_TRACE_OS, (" size %lld\n", mtd->size));
-#endif
-
-#ifdef CONFIG_YAFFS_AUTO_YAFFS2
-
- if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) {
- T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs2\n"));
- yaffsVersion = 2;
- }
-
- /* Added NCB 26/5/2006 for completeness */
- if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
- T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs1\n"));
- yaffsVersion = 1;
- }
-
-#endif
-
- if (yaffsVersion == 2) {
- /* Check for version 2 style functions */
- if (!mtd->erase ||
- !mtd->block_isbad ||
- !mtd->block_markbad ||
- !mtd->read ||
- !mtd->write ||
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- !mtd->read_oob || !mtd->write_oob) {
-#else
- !mtd->write_ecc ||
- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
-#endif
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs: MTD device does not support required "
- "functions\n"));;
- return NULL;
- }
-
- if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
- mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
- !options.inband_tags) {
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs: MTD device does not have the "
- "right page sizes\n"));
- return NULL;
- }
- } else {
- /* Check for V1 style functions */
- if (!mtd->erase ||
- !mtd->read ||
- !mtd->write ||
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- !mtd->read_oob || !mtd->write_oob) {
-#else
- !mtd->write_ecc ||
- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
-#endif
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs: MTD device does not support required "
- "functions\n"));;
- return NULL;
- }
-
- if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
- mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs: MTD device does not support have the "
- "right page sizes\n"));
- return NULL;
- }
- }
-
- /* OK, so if we got here, we have an MTD that's NAND and looks
- * like it has the right capabilities
- * Set the yaffs_Device up for mtd
- */
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
-#else
- sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
-#endif
- if (!dev) {
- /* Deep shit could not allocate device structure */
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs_read_super: Failed trying to allocate "
- "yaffs_Device. \n"));
- return NULL;
- }
-
- memset(dev, 0, sizeof(yaffs_Device));
- dev->genericDevice = mtd;
- dev->name = mtd->name;
-
- /* Set up the memory size parameters.... */
-
- nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
-
- dev->startBlock = 0;
- dev->endBlock = nBlocks - 1;
- dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
- dev->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
- dev->nReservedBlocks = 5;
- dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
- dev->inbandTags = options.inband_tags;
-
- /* ... and the functions. */
- if (yaffsVersion == 2) {
- dev->writeChunkWithTagsToNAND =
- nandmtd2_WriteChunkWithTagsToNAND;
- dev->readChunkWithTagsFromNAND =
- nandmtd2_ReadChunkWithTagsFromNAND;
- dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
- dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
- dev->spareBuffer = YMALLOC(mtd->oobsize);
- dev->isYaffs2 = 1;
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- dev->totalBytesPerChunk = mtd->writesize;
- dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
-#else
- dev->totalBytesPerChunk = mtd->oobblock;
- dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
-#endif
- nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
-
- dev->startBlock = 0;
- dev->endBlock = nBlocks - 1;
- } else {
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- /* use the MTD interface in yaffs_mtdif1.c */
- dev->writeChunkWithTagsToNAND =
- nandmtd1_WriteChunkWithTagsToNAND;
- dev->readChunkWithTagsFromNAND =
- nandmtd1_ReadChunkWithTagsFromNAND;
- dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
- dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
-#else
- dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
- dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
-#endif
- dev->isYaffs2 = 0;
- }
- /* ... and common functions */
- dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
- dev->initialiseNAND = nandmtd_InitialiseNAND;
-
- dev->putSuperFunc = yaffs_MTDPutSuper;
-
- dev->superBlock = (void *)sb;
- dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
-
-
-#ifndef CONFIG_YAFFS_DOES_ECC
- dev->useNANDECC = 1;
-#endif
-
-#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
- dev->wideTnodesDisabled = 1;
-#endif
-
- dev->skipCheckpointRead = options.skip_checkpoint_read;
- dev->skipCheckpointWrite = options.skip_checkpoint_write;
-
- /* we assume this is protected by lock_kernel() in mount/umount */
- ylist_add_tail(&dev->devList, &yaffs_dev_list);
-
- init_MUTEX(&dev->grossLock);
-
- yaffs_GrossLock(dev);
-
- err = yaffs_GutsInitialise(dev);
-
- T(YAFFS_TRACE_OS,
- ("yaffs_read_super: guts initialised %s\n",
- (err == YAFFS_OK) ? "OK" : "FAILED"));
-
- /* Release lock before yaffs_get_inode() */
- yaffs_GrossUnlock(dev);
-
- /* Create root inode */
- if (err == YAFFS_OK)
- inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
- yaffs_Root(dev));
-
- if (!inode)
- return NULL;
-
- inode->i_op = &yaffs_dir_inode_operations;
- inode->i_fop = &yaffs_dir_operations;
-
- T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n"));
-
- root = d_alloc_root(inode);
-
- T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n"));
-
- if (!root) {
- iput(inode);
- return NULL;
- }
- sb->s_root = root;
- sb->s_dirt = !dev->isCheckpointed;
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs_read_super: isCheckpointed %d\n", dev->isCheckpointed));
-
- T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
- return sb;
-}
-
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
- int silent)
-{
- return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs_read_super(struct file_system_type *fs,
- int flags, const char *dev_name,
- void *data, struct vfsmount *mnt)
-{
-
- return get_sb_bdev(fs, flags, dev_name, data,
- yaffs_internal_read_super_mtd, mnt);
-}
-#else
-static struct super_block *yaffs_read_super(struct file_system_type *fs,
- int flags, const char *dev_name,
- void *data)
-{
-
- return get_sb_bdev(fs, flags, dev_name, data,
- yaffs_internal_read_super_mtd);
-}
-#endif
-
-static struct file_system_type yaffs_fs_type = {
- .owner = THIS_MODULE,
- .name = "yaffs",
- .get_sb = yaffs_read_super,
- .kill_sb = kill_block_super,
- .fs_flags = FS_REQUIRES_DEV,
-};
-#else
-static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
- int silent)
-{
- return yaffs_internal_read_super(1, sb, data, silent);
-}
-
-static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
- FS_REQUIRES_DEV);
-#endif
-
-
-#ifdef CONFIG_YAFFS_YAFFS2
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
- int silent)
-{
- return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
-static int yaffs2_read_super(struct file_system_type *fs,
- int flags, const char *dev_name, void *data,
- struct vfsmount *mnt)
-{
- return get_sb_bdev(fs, flags, dev_name, data,
- yaffs2_internal_read_super_mtd, mnt);
-}
-#else
-static struct super_block *yaffs2_read_super(struct file_system_type *fs,
- int flags, const char *dev_name,
- void *data)
-{
-
- return get_sb_bdev(fs, flags, dev_name, data,
- yaffs2_internal_read_super_mtd);
-}
-#endif
-
-static struct file_system_type yaffs2_fs_type = {
- .owner = THIS_MODULE,
- .name = "yaffs2",
- .get_sb = yaffs2_read_super,
- .kill_sb = kill_block_super,
- .fs_flags = FS_REQUIRES_DEV,
-};
-#else
-static struct super_block *yaffs2_read_super(struct super_block *sb,
- void *data, int silent)
-{
- return yaffs_internal_read_super(2, sb, data, silent);
-}
-
-static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
- FS_REQUIRES_DEV);
-#endif
-
-#endif /* CONFIG_YAFFS_YAFFS2 */
-
-static struct proc_dir_entry *my_proc_entry;
-
-static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
-{
- buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
- buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
- buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->totalBytesPerChunk);
- buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
- buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
- buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
- buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
- buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
- buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
- buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
- buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
- buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated);
- buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects);
- buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
- buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites);
- buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
- buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
- buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
- buf += sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
- buf += sprintf(buf, "passiveGCs......... %d\n",
- dev->passiveGarbageCollections);
- buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
- buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
- buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks);
- buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed);
- buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed);
- buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed);
- buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed);
- buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits);
- buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles);
- buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles);
- buf +=
- sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
- buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
- buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
- buf += sprintf(buf, "inbandTags......... %d\n", dev->inbandTags);
-
- return buf;
-}
-
-static int yaffs_proc_read(char *page,
- char **start,
- off_t offset, int count, int *eof, void *data)
-{
- struct ylist_head *item;
- char *buf = page;
- int step = offset;
- int n = 0;
-
- /* Get proc_file_read() to step 'offset' by one on each sucessive call.
- * We use 'offset' (*ppos) to indicate where we are in devList.
- * This also assumes the user has posted a read buffer large
- * enough to hold the complete output; but that's life in /proc.
- */
-
- *(int *)start = 1;
-
- /* Print header first */
- if (step == 0) {
- buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
- "\n%s\n%s\n", yaffs_fs_c_version,
- yaffs_guts_c_version);
- }
-
- /* hold lock_kernel while traversing yaffs_dev_list */
- lock_kernel();
-
- /* Locate and print the Nth entry. Order N-squared but N is small. */
- ylist_for_each(item, &yaffs_dev_list) {
- yaffs_Device *dev = ylist_entry(item, yaffs_Device, devList);
- if (n < step) {
- n++;
- continue;
- }
- buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name);
- buf = yaffs_dump_dev(buf, dev);
- break;
- }
- unlock_kernel();
-
- return buf - page < count ? buf - page : count;
-}
-
-/**
- * Set the verbosity of the warnings and error messages.
- *
- * Note that the names can only be a..z or _ with the current code.
- */
-
-static struct {
- char *mask_name;
- unsigned mask_bitfield;
-} mask_flags[] = {
- {"allocate", YAFFS_TRACE_ALLOCATE},
- {"always", YAFFS_TRACE_ALWAYS},
- {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
- {"buffers", YAFFS_TRACE_BUFFERS},
- {"bug", YAFFS_TRACE_BUG},
- {"checkpt", YAFFS_TRACE_CHECKPOINT},
- {"deletion", YAFFS_TRACE_DELETION},
- {"erase", YAFFS_TRACE_ERASE},
- {"error", YAFFS_TRACE_ERROR},
- {"gc_detail", YAFFS_TRACE_GC_DETAIL},
- {"gc", YAFFS_TRACE_GC},
- {"mtd", YAFFS_TRACE_MTD},
- {"nandaccess", YAFFS_TRACE_NANDACCESS},
- {"os", YAFFS_TRACE_OS},
- {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
- {"scan", YAFFS_TRACE_SCAN},
- {"tracing", YAFFS_TRACE_TRACING},
-
- {"verify", YAFFS_TRACE_VERIFY},
- {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
- {"verify_full", YAFFS_TRACE_VERIFY_FULL},
- {"verify_all", YAFFS_TRACE_VERIFY_ALL},
-
- {"write", YAFFS_TRACE_WRITE},
- {"all", 0xffffffff},
- {"none", 0},
- {NULL, 0},
-};
-
-#define MAX_MASK_NAME_LENGTH 40
-static int yaffs_proc_write(struct file *file, const char *buf,
- unsigned long count, void *data)
-{
- unsigned rg = 0, mask_bitfield;
- char *end;
- char *mask_name;
- const char *x;
- char substring[MAX_MASK_NAME_LENGTH + 1];
- int i;
- int done = 0;
- int add, len = 0;
- int pos = 0;
-
- rg = yaffs_traceMask;
-
- while (!done && (pos < count)) {
- done = 1;
- while ((pos < count) && isspace(buf[pos]))
- pos++;
-
- switch (buf[pos]) {
- case '+':
- case '-':
- case '=':
- add = buf[pos];
- pos++;
- break;
-
- default:
- add = ' ';
- break;
- }
- mask_name = NULL;
-
- mask_bitfield = simple_strtoul(buf + pos, &end, 0);
-
- if (end > buf + pos) {
- mask_name = "numeral";
- len = end - (buf + pos);
- pos += len;
- done = 0;
- } else {
- for (x = buf + pos, i = 0;
- (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
- i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
- substring[i] = *x;
- substring[i] = '\0';
-
- for (i = 0; mask_flags[i].mask_name != NULL; i++) {
- if (strcmp(substring, mask_flags[i].mask_name) == 0) {
- mask_name = mask_flags[i].mask_name;
- mask_bitfield = mask_flags[i].mask_bitfield;
- done = 0;
- break;
- }
- }
- }
-
- if (mask_name != NULL) {
- done = 0;
- switch (add) {
- case '-':
- rg &= ~mask_bitfield;
- break;
- case '+':
- rg |= mask_bitfield;
- break;
- case '=':
- rg = mask_bitfield;
- break;
- default:
- rg |= mask_bitfield;
- break;
- }
- }
- }
-
- yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
-
- printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask);
-
- if (rg & YAFFS_TRACE_ALWAYS) {
- for (i = 0; mask_flags[i].mask_name != NULL; i++) {
- char flag;
- flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
- printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
- }
- }
-
- return count;
-}
-
-/* Stuff to handle installation of file systems */
-struct file_system_to_install {
- struct file_system_type *fst;
- int installed;
-};
-
-static struct file_system_to_install fs_to_install[] = {
- {&yaffs_fs_type, 0},
- {&yaffs2_fs_type, 0},
- {NULL, 0}
-};
-
-static int __init init_yaffs_fs(void)
-{
- int error = 0;
- struct file_system_to_install *fsinst;
-
- T(YAFFS_TRACE_ALWAYS,
- ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
-
- /* Install the proc_fs entry */
- my_proc_entry = create_proc_entry("yaffs",
- S_IRUGO | S_IFREG,
- YPROC_ROOT);
-
- if (my_proc_entry) {
- my_proc_entry->write_proc = yaffs_proc_write;
- my_proc_entry->read_proc = yaffs_proc_read;
- my_proc_entry->data = NULL;
- } else
- return -ENOMEM;
-
- /* Now add the file system entries */
-
- fsinst = fs_to_install;
-
- while (fsinst->fst && !error) {
- error = register_filesystem(fsinst->fst);
- if (!error)
- fsinst->installed = 1;
- fsinst++;
- }
-
- /* Any errors? uninstall */
- if (error) {
- fsinst = fs_to_install;
-
- while (fsinst->fst) {
- if (fsinst->installed) {
- unregister_filesystem(fsinst->fst);
- fsinst->installed = 0;
- }
- fsinst++;
- }
- }
-
- return error;
-}
-
-static void __exit exit_yaffs_fs(void)
-{
-
- struct file_system_to_install *fsinst;
-
- T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
- " removing. \n"));
-
- remove_proc_entry("yaffs", YPROC_ROOT);
-
- fsinst = fs_to_install;
-
- while (fsinst->fst) {
- if (fsinst->installed) {
- unregister_filesystem(fsinst->fst);
- fsinst->installed = 0;
- }
- fsinst++;
- }
-}
-
-module_init(init_yaffs_fs)
-module_exit(exit_yaffs_fs)
-
-MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
-MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
-MODULE_LICENSE("GPL");
diff -Nrup a/fs/yaffs2/yaffs_getblockinfo.h b/fs/yaffs2/yaffs_getblockinfo.h
--- a/fs/yaffs2/yaffs_getblockinfo.h 2010-10-03 17:48:22.710000363 +0300
+++ b/fs/yaffs2/yaffs_getblockinfo.h 2010-10-03 18:03:47.542000362 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -17,6 +17,7 @@
#define __YAFFS_GETBLOCKINFO_H__
#include "yaffs_guts.h"
+#include "yaffs_trace.h"
/* Function to manipulate block info */
static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk)
diff -Nrup a/fs/yaffs2/yaffs_guts.c b/fs/yaffs2/yaffs_guts.c
--- a/fs/yaffs2/yaffs_guts.c 2010-10-03 17:48:22.715000364 +0300
+++ b/fs/yaffs2/yaffs_guts.c 2010-10-03 18:03:47.518000364 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -10,11 +10,8 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-
-const char *yaffs_guts_c_version =
- "$Id: yaffs_guts.c,v 1.82 2009-03-09 04:24:17 charles Exp $";
-
#include "yportenv.h"
+#include "yaffs_trace.h"
#include "yaffsinterface.h"
#include "yaffs_guts.h"
@@ -22,22 +19,28 @@ const char *yaffs_guts_c_version =
#include "yaffs_getblockinfo.h"
#include "yaffs_tagscompat.h"
-#ifndef CONFIG_YAFFS_USE_OWN_SORT
-#include "yaffs_qsort.h"
-#endif
+
#include "yaffs_nand.h"
-#include "yaffs_checkptrw.h"
+#include "yaffs_yaffs1.h"
+#include "yaffs_yaffs2.h"
+#include "yaffs_bitmap.h"
+#include "yaffs_verify.h"
#include "yaffs_nand.h"
#include "yaffs_packedtags2.h"
+#include "yaffs_nameval.h"
+#include "yaffs_allocator.h"
-#define YAFFS_PASSIVE_GC_CHUNKS 2
+/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */
+#define YAFFS_GC_GOOD_ENOUGH 2
+#define YAFFS_GC_PASSIVE_THRESHOLD 4
#include "yaffs_ecc.h"
+
/* Robustification (if it ever comes about...) */
static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND);
static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
@@ -49,33 +52,26 @@ static void yaffs_HandleUpdateChunk(yaff
const yaffs_ExtendedTags *tags);
/* Other local prototypes */
+static void yaffs_UpdateParent(yaffs_Object *obj);
static int yaffs_UnlinkObject(yaffs_Object *obj);
static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
-static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
-
static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev,
const __u8 *buffer,
yaffs_ExtendedTags *tags,
int useReserve);
-static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
- int chunkInNAND, int inScan);
+
static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
yaffs_ObjectType type);
-static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
- yaffs_Object *obj);
-static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
- int force, int isShrink, int shadows);
+
+
+static int yaffs_ApplyXMod(yaffs_Object *obj, char *buffer, yaffs_XAttrMod *xmod);
+
static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
static int yaffs_CheckStructures(void);
-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
- int chunkOffset, int *limit);
static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
-static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo);
-
-
static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
int chunkInNAND);
@@ -87,30 +83,22 @@ static int yaffs_TagsMatch(const yaffs_E
static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
yaffs_BlockInfo **blockUsedPtr);
-static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
-
static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
-static void yaffs_VerifyDirectory(yaffs_Object *directory);
-#ifdef YAFFS_PARANOID
-static int yaffs_CheckFileSanity(yaffs_Object *in);
-#else
-#define yaffs_CheckFileSanity(in)
-#endif
-
static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
-static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
-
static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
yaffs_ExtendedTags *tags);
-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
- unsigned pos);
-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
- yaffs_FileStructure *fStruct,
- __u32 chunkId);
+static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
+ int chunkInNAND,
+ const __u8 *data,
+ yaffs_ExtendedTags *tags);
+
+
+static void yaffs_LoadNameFromObjectHeader(yaffs_Device *dev,YCHAR *name, const YCHAR *ohName, int bufferSize);
+static void yaffs_LoadObjectHeaderFromName(yaffs_Device *dev,YCHAR *ohName, const YCHAR *name);
/* Function to calculate chunk and offset */
@@ -172,7 +160,7 @@ static __u32 ShiftsGE(__u32 x)
static __u32 Shifts(__u32 x)
{
- int nShifts;
+ __u32 nShifts;
nShifts = 0;
@@ -203,7 +191,7 @@ static int yaffs_InitialiseTempBuffers(y
for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
dev->tempBuffer[i].line = 0; /* not in use */
dev->tempBuffer[i].buffer = buf =
- YMALLOC_DMA(dev->totalBytesPerChunk);
+ YMALLOC_DMA(dev->param.totalBytesPerChunk);
}
return buf ? YAFFS_OK : YAFFS_FAIL;
@@ -286,7 +274,7 @@ int yaffs_IsManagedTempBuffer(yaffs_Devi
return 1;
}
- for (i = 0; i < dev->nShortOpCaches; i++) {
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
if (dev->srCache[i].data == buffer)
return 1;
}
@@ -299,6374 +287,4183 @@ int yaffs_IsManagedTempBuffer(yaffs_Devi
return 0;
}
-
-
/*
- * Chunk bitmap manipulations
+ * Verification code
*/
-static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
-{
- if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
- blk));
- YBUG();
- }
- return dev->chunkBits +
- (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
-}
-static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
-{
- if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
- chunk < 0 || chunk >= dev->nChunksPerBlock) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
- blk, chunk));
- YBUG();
- }
-}
-static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
-{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
- memset(blkBits, 0, dev->chunkBitmapStride);
-}
+/*
+ * Simple hash function. Needs to have a reasonable spread
+ */
-static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
+static Y_INLINE int yaffs_HashFunction(int n)
{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
-
- yaffs_VerifyChunkBitId(dev, blk, chunk);
-
- blkBits[chunk / 8] &= ~(1 << (chunk & 7));
+ n = abs(n);
+ return n % YAFFS_NOBJECT_BUCKETS;
}
-static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk)
-{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
-
- yaffs_VerifyChunkBitId(dev, blk, chunk);
-
- blkBits[chunk / 8] |= (1 << (chunk & 7));
-}
+/*
+ * Access functions to useful fake objects.
+ * Note that root might have a presence in NAND if permissions are set.
+ */
-static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
+yaffs_Object *yaffs_Root(yaffs_Device *dev)
{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
- yaffs_VerifyChunkBitId(dev, blk, chunk);
-
- return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
+ return dev->rootDir;
}
-static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
+yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
- int i;
- for (i = 0; i < dev->chunkBitmapStride; i++) {
- if (*blkBits)
- return 1;
- blkBits++;
- }
- return 0;
+ return dev->lostNFoundDir;
}
-static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
-{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
- int i;
- int n = 0;
- for (i = 0; i < dev->chunkBitmapStride; i++) {
- __u8 x = *blkBits;
- while (x) {
- if (x & 1)
- n++;
- x >>= 1;
- }
-
- blkBits++;
- }
- return n;
-}
/*
- * Verification code
+ * Erased NAND checking functions
*/
-static int yaffs_SkipVerification(yaffs_Device *dev)
-{
- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
-}
-
-static int yaffs_SkipFullVerification(yaffs_Device *dev)
-{
- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
-}
-
-static int yaffs_SkipNANDVerification(yaffs_Device *dev)
+int yaffs_CheckFF(__u8 *buffer, int nBytes)
{
- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
+ /* Horrible, slow implementation */
+ while (nBytes--) {
+ if (*buffer != 0xFF)
+ return 0;
+ buffer++;
+ }
+ return 1;
}
-static const char *blockStateName[] = {
-"Unknown",
-"Needs scanning",
-"Scanning",
-"Empty",
-"Allocating",
-"Full",
-"Dirty",
-"Checkpoint",
-"Collecting",
-"Dead"
-};
-
-static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
+static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
+ int chunkInNAND)
{
- int actuallyUsed;
- int inUse;
+ int retval = YAFFS_OK;
+ __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
+ yaffs_ExtendedTags tags;
+ int result;
- if (yaffs_SkipVerification(dev))
- return;
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
- /* Report illegal runtime states */
- if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
+ if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
+ retval = YAFFS_FAIL;
- switch (bi->blockState) {
- case YAFFS_BLOCK_STATE_UNKNOWN:
- case YAFFS_BLOCK_STATE_SCANNING:
- case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
- n, blockStateName[bi->blockState]));
+ if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
+ T(YAFFS_TRACE_NANDACCESS,
+ (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
+ retval = YAFFS_FAIL;
}
- /* Check pages in use and soft deletions are legal */
-
- actuallyUsed = bi->pagesInUse - bi->softDeletions;
-
- if (bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
- bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
- actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
- n, bi->pagesInUse, bi->softDeletions));
-
+ yaffs_ReleaseTempBuffer(dev, data, __LINE__);
- /* Check chunk bitmap legal */
- inUse = yaffs_CountChunkBits(dev, n);
- if (inUse != bi->pagesInUse)
- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
- n, bi->pagesInUse, inUse));
+ return retval;
- /* Check that the sequence number is valid.
- * Ten million is legal, but is very unlikely
- */
- if (dev->isYaffs2 &&
- (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
- (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
- n, bi->sequenceNumber));
}
-static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
- int n)
+
+static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
+ int chunkInNAND,
+ const __u8 *data,
+ yaffs_ExtendedTags *tags)
{
- yaffs_VerifyBlock(dev, bi, n);
+ int retval = YAFFS_OK;
+ yaffs_ExtendedTags tempTags;
+ __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
+ int result;
+
+ result = yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND,buffer,&tempTags);
+ if(memcmp(buffer,data,dev->nDataBytesPerChunk) ||
+ tempTags.objectId != tags->objectId ||
+ tempTags.chunkId != tags->chunkId ||
+ tempTags.byteCount != tags->byteCount)
+ retval = YAFFS_FAIL;
- /* After collection the block should be in the erased state */
- /* This will need to change if we do partial gc */
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
- if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
- bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
- T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
- n, bi->blockState));
- }
+ return retval;
}
-static void yaffs_VerifyBlocks(yaffs_Device *dev)
+static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
+ const __u8 *data,
+ yaffs_ExtendedTags *tags,
+ int useReserve)
{
- int i;
- int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
- int nIllegalBlockStates = 0;
-
- if (yaffs_SkipVerification(dev))
- return;
-
- memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
-
- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
- yaffs_VerifyBlock(dev, bi, i);
-
- if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
- nBlocksPerState[bi->blockState]++;
- else
- nIllegalBlockStates++;
- }
+ int attempts = 0;
+ int writeOk = 0;
+ int chunk;
- T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
- T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
+ yaffs2_InvalidateCheckpoint(dev);
- T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
- if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
- T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
+ do {
+ yaffs_BlockInfo *bi = 0;
+ int erasedOk = 0;
- for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
- T(YAFFS_TRACE_VERIFY,
- (TSTR("%s %d blocks"TENDSTR),
- blockStateName[i], nBlocksPerState[i]));
+ chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
+ if (chunk < 0) {
+ /* no space */
+ break;
+ }
- if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
- dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
+ /* First check this chunk is erased, if it needs
+ * checking. The checking policy (unless forced
+ * always on) is as follows:
+ *
+ * Check the first page we try to write in a block.
+ * If the check passes then we don't need to check any
+ * more. If the check fails, we check again...
+ * If the block has been erased, we don't need to check.
+ *
+ * However, if the block has been prioritised for gc,
+ * then we think there might be something odd about
+ * this block and stop using it.
+ *
+ * Rationale: We should only ever see chunks that have
+ * not been erased if there was a partially written
+ * chunk due to power loss. This checking policy should
+ * catch that case with very few checks and thus save a
+ * lot of checks that are most likely not needed.
+ *
+ * Mods to the above
+ * If an erase check fails or the write fails we skip the
+ * rest of the block.
+ */
- if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
- dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
+ /* let's give it a try */
+ attempts++;
- if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
- nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
+ if(dev->param.alwaysCheckErased)
+ bi->skipErasedCheck = 0;
- T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
+ if (!bi->skipErasedCheck) {
+ erasedOk = yaffs_CheckChunkErased(dev, chunk);
+ if (erasedOk != YAFFS_OK) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("**>> yaffs chunk %d was not erased"
+ TENDSTR), chunk));
-}
+ /* If not erased, delete this one,
+ * skip rest of block and
+ * try another chunk */
+ yaffs_DeleteChunk(dev,chunk,1,__LINE__);
+ yaffs_SkipRestOfBlock(dev);
+ continue;
+ }
+ }
-/*
- * Verify the object header. oh must be valid, but obj and tags may be NULL in which
- * case those tests will not be performed.
- */
-static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
-{
- if (obj && yaffs_SkipVerification(obj->myDev))
- return;
+ writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
+ data, tags);
- if (!(tags && obj && oh)) {
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR),
- (__u32)tags, (__u32)obj, (__u32)oh));
- return;
- }
+ if(!bi->skipErasedCheck)
+ writeOk = yaffs_VerifyChunkWritten(dev, chunk, data, tags);
- if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
- oh->type > YAFFS_OBJECT_TYPE_MAX)
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
- tags->objectId, oh->type));
+ if (writeOk != YAFFS_OK) {
+ /* Clean up aborted write, skip to next block and
+ * try another chunk */
+ yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
+ continue;
+ }
- if (tags->objectId != obj->objectId)
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
- tags->objectId, obj->objectId));
+ bi->skipErasedCheck = 1;
+ /* Copy the data into the robustification buffer */
+ yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
- /*
- * Check that the object's parent ids match if parentCheck requested.
- *
- * Tests do not apply to the root object.
- */
+ } while (writeOk != YAFFS_OK &&
+ (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
- if (parentCheck && tags->objectId > 1 && !obj->parent)
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
- tags->objectId, oh->parentObjectId));
+ if (!writeOk)
+ chunk = -1;
- if (parentCheck && obj->parent &&
- oh->parentObjectId != obj->parent->objectId &&
- (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
- obj->parent->objectId != YAFFS_OBJECTID_DELETED))
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
- tags->objectId, oh->parentObjectId, obj->parent->objectId));
+ if (attempts > 1) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("**>> yaffs write required %d attempts" TENDSTR),
+ attempts));
- if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d header name is NULL"TENDSTR),
- obj->objectId));
+ dev->nRetriedWrites += (attempts - 1);
+ }
- if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d header name is 0xFF"TENDSTR),
- obj->objectId));
+ return chunk;
}
+
+/*
+ * Block retiring for handling a broken block.
+ */
-static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
- __u32 level, int chunkOffset)
+static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
{
- int i;
- yaffs_Device *dev = obj->myDev;
- int ok = 1;
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
- if (tn) {
- if (level > 0) {
+ yaffs2_InvalidateCheckpoint(dev);
+
+ yaffs2_ClearOldestDirtySequence(dev,bi);
- for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
- if (tn->internal[i]) {
- ok = yaffs_VerifyTnodeWorker(obj,
- tn->internal[i],
- level - 1,
- (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
- }
- }
- } else if (level == 0) {
+ if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
+ if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR(
+ "yaffs: Failed to mark bad and erase block %d"
+ TENDSTR), blockInNAND));
+ } else {
yaffs_ExtendedTags tags;
- __u32 objectId = obj->objectId;
+ int chunkId = blockInNAND * dev->param.nChunksPerBlock;
- chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
+ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
- for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
- __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+ memset(buffer, 0xff, dev->nDataBytesPerChunk);
+ yaffs_InitialiseTags(&tags);
+ tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
+ if (dev->param.writeChunkWithTagsToNAND(dev, chunkId -
+ dev->chunkOffset, buffer, &tags) != YAFFS_OK)
+ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
+ TCONT("write bad block marker to block %d")
+ TENDSTR), blockInNAND));
- if (theChunk > 0) {
- /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
- yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
- if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
- T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
- objectId, chunkOffset, theChunk,
- tags.objectId, tags.chunkId));
- }
- }
- chunkOffset++;
- }
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
}
}
- return ok;
+ bi->blockState = YAFFS_BLOCK_STATE_DEAD;
+ bi->gcPrioritise = 0;
+ bi->needsRetiring = 0;
+ dev->nRetiredBlocks++;
}
+/*
+ * Functions for robustisizing TODO
+ *
+ */
-static void yaffs_VerifyFile(yaffs_Object *obj)
+static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
+ const __u8 *data,
+ const yaffs_ExtendedTags *tags)
{
- int requiredTallness;
- int actualTallness;
- __u32 lastChunk;
- __u32 x;
- __u32 i;
- yaffs_Device *dev;
- yaffs_ExtendedTags tags;
- yaffs_Tnode *tn;
- __u32 objectId;
+ dev=dev;
+ chunkInNAND=chunkInNAND;
+ data=data;
+ tags=tags;
+}
- if (!obj)
- return;
+static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
+ const yaffs_ExtendedTags *tags)
+{
+ dev=dev;
+ chunkInNAND=chunkInNAND;
+ tags=tags;
+}
- if (yaffs_SkipVerification(obj->myDev))
- return;
+void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
+{
+ if (!bi->gcPrioritise) {
+ bi->gcPrioritise = 1;
+ dev->hasPendingPrioritisedGCs = 1;
+ bi->chunkErrorStrikes++;
- dev = obj->myDev;
- objectId = obj->objectId;
+ if (bi->chunkErrorStrikes > 3) {
+ bi->needsRetiring = 1; /* Too many stikes, so retire this */
+ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
- /* Check file size is consistent with tnode depth */
- lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
- x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
- requiredTallness = 0;
- while (x > 0) {
- x >>= YAFFS_TNODES_INTERNAL_BITS;
- requiredTallness++;
+ }
}
+}
+
+static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
+ int erasedOk)
+{
+ int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock;
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
- actualTallness = obj->variant.fileVariant.topLevel;
+ yaffs_HandleChunkError(dev, bi);
- if (requiredTallness > actualTallness)
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
- obj->objectId, actualTallness, requiredTallness));
+ if (erasedOk) {
+ /* Was an actual write failure, so mark the block for retirement */
+ bi->needsRetiring = 1;
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
+ }
+
+ /* Delete the chunk */
+ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
+ yaffs_SkipRestOfBlock(dev);
+}
- /* Check that the chunks in the tnode tree are all correct.
- * We do this by scanning through the tnode tree and
- * checking the tags for every chunk match.
- */
+/*---------------- Name handling functions ------------*/
- if (yaffs_SkipNANDVerification(dev))
- return;
+static __u16 yaffs_CalcNameSum(const YCHAR *name)
+{
+ __u16 sum = 0;
+ __u16 i = 1;
- for (i = 1; i <= lastChunk; i++) {
- tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
+ const YUCHAR *bname = (const YUCHAR *) name;
+ if (bname) {
+ while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
- if (tn) {
- __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
- if (theChunk > 0) {
- /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
- yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
- if (tags.objectId != objectId || tags.chunkId != i) {
- T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
- objectId, i, theChunk,
- tags.objectId, tags.chunkId));
- }
- }
+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
+ sum += yaffs_toupper(*bname) * i;
+#else
+ sum += (*bname) * i;
+#endif
+ i++;
+ bname++;
}
}
+ return sum;
}
-
-static void yaffs_VerifyHardLink(yaffs_Object *obj)
+void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
{
- if (obj && yaffs_SkipVerification(obj->myDev))
- return;
+#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+ memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
+ if (name && yaffs_strnlen(name,YAFFS_SHORT_NAME_LENGTH+1) <= YAFFS_SHORT_NAME_LENGTH)
+ yaffs_strcpy(obj->shortName, name);
+ else
+ obj->shortName[0] = _Y('\0');
+#endif
+ obj->sum = yaffs_CalcNameSum(name);
+}
- /* Verify sane equivalent object */
+void yaffs_SetObjectNameFromOH(yaffs_Object *obj, const yaffs_ObjectHeader *oh)
+{
+#ifdef CONFIG_YAFFS_AUTO_UNICODE
+ YCHAR tmpName[YAFFS_MAX_NAME_LENGTH+1];
+ memset(tmpName,0,sizeof(tmpName));
+ yaffs_LoadNameFromObjectHeader(obj->myDev,tmpName,oh->name,YAFFS_MAX_NAME_LENGTH+1);
+ yaffs_SetObjectName(obj,tmpName);
+#else
+ yaffs_SetObjectName(obj,oh->name);
+#endif
}
-static void yaffs_VerifySymlink(yaffs_Object *obj)
+/*-------------------- TNODES -------------------
+
+ * List of spare tnodes
+ * The list is hooked together using the first pointer
+ * in the tnode.
+ */
+
+
+yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
{
- if (obj && yaffs_SkipVerification(obj->myDev))
- return;
+ yaffs_Tnode *tn = yaffs_AllocateRawTnode(dev);
+ if (tn){
+ memset(tn, 0, dev->tnodeSize);
+ dev->nTnodes++;
+ }
+
+ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
- /* Verify symlink string */
+ return tn;
}
-static void yaffs_VerifySpecial(yaffs_Object *obj)
+/* FreeTnode frees up a tnode and puts it back on the free list */
+static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
{
- if (obj && yaffs_SkipVerification(obj->myDev))
- return;
+ yaffs_FreeRawTnode(dev,tn);
+ dev->nTnodes--;
+ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
}
-static void yaffs_VerifyObject(yaffs_Object *obj)
+static void yaffs_DeinitialiseTnodesAndObjects(yaffs_Device *dev)
{
- yaffs_Device *dev;
-
- __u32 chunkMin;
- __u32 chunkMax;
-
- __u32 chunkIdOk;
- __u32 chunkInRange;
- __u32 chunkShouldNotBeDeleted;
- __u32 chunkValid;
-
- if (!obj)
- return;
+ yaffs_DeinitialiseRawTnodesAndObjects(dev);
+ dev->nObjects = 0;
+ dev->nTnodes = 0;
+}
- if (obj->beingCreated)
- return;
- dev = obj->myDev;
+void yaffs_LoadLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
+ unsigned val)
+{
+ __u32 *map = (__u32 *)tn;
+ __u32 bitInMap;
+ __u32 bitInWord;
+ __u32 wordInMap;
+ __u32 mask;
- if (yaffs_SkipVerification(dev))
- return;
+ pos &= YAFFS_TNODES_LEVEL0_MASK;
+ val >>= dev->chunkGroupBits;
- /* Check sane object header chunk */
+ bitInMap = pos * dev->tnodeWidth;
+ wordInMap = bitInMap / 32;
+ bitInWord = bitInMap & (32 - 1);
- chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
- chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
+ mask = dev->tnodeMask << bitInWord;
- chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
- chunkIdOk = chunkInRange || obj->hdrChunk == 0;
- chunkValid = chunkInRange &&
- yaffs_CheckChunkBit(dev,
- obj->hdrChunk / dev->nChunksPerBlock,
- obj->hdrChunk % dev->nChunksPerBlock);
- chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
+ map[wordInMap] &= ~mask;
+ map[wordInMap] |= (mask & (val << bitInWord));
- if (!obj->fake &&
- (!chunkIdOk || chunkShouldNotBeDeleted)) {
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
- obj->objectId, obj->hdrChunk,
- chunkIdOk ? "" : ",out of range",
- chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
+ if (dev->tnodeWidth > (32 - bitInWord)) {
+ bitInWord = (32 - bitInWord);
+ wordInMap++;;
+ mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
+ map[wordInMap] &= ~mask;
+ map[wordInMap] |= (mask & (val >> bitInWord));
}
+}
- if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
- yaffs_ExtendedTags tags;
- yaffs_ObjectHeader *oh;
- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
-
- oh = (yaffs_ObjectHeader *)buffer;
+__u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
+ unsigned pos)
+{
+ __u32 *map = (__u32 *)tn;
+ __u32 bitInMap;
+ __u32 bitInWord;
+ __u32 wordInMap;
+ __u32 val;
- yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
- &tags);
+ pos &= YAFFS_TNODES_LEVEL0_MASK;
- yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
+ bitInMap = pos * dev->tnodeWidth;
+ wordInMap = bitInMap / 32;
+ bitInWord = bitInMap & (32 - 1);
- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
- }
+ val = map[wordInMap] >> bitInWord;
- /* Verify it has a parent */
- if (obj && !obj->fake &&
- (!obj->parent || obj->parent->myDev != dev)) {
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
- obj->objectId, obj->parent));
+ if (dev->tnodeWidth > (32 - bitInWord)) {
+ bitInWord = (32 - bitInWord);
+ wordInMap++;;
+ val |= (map[wordInMap] << bitInWord);
}
- /* Verify parent is a directory */
- if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
- obj->objectId, obj->parent->variantType));
- }
+ val &= dev->tnodeMask;
+ val <<= dev->chunkGroupBits;
- switch (obj->variantType) {
- case YAFFS_OBJECT_TYPE_FILE:
- yaffs_VerifyFile(obj);
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- yaffs_VerifySymlink(obj);
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- yaffs_VerifyDirectory(obj);
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- yaffs_VerifyHardLink(obj);
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- yaffs_VerifySpecial(obj);
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- default:
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d has illegaltype %d"TENDSTR),
- obj->objectId, obj->variantType));
- break;
- }
+ return val;
}
-static void yaffs_VerifyObjects(yaffs_Device *dev)
+/* ------------------- End of individual tnode manipulation -----------------*/
+
+/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
+ * The look up tree is represented by the top tnode and the number of topLevel
+ * in the tree. 0 means only the level 0 tnode is in the tree.
+ */
+
+/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
+yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
+ yaffs_FileStructure *fStruct,
+ __u32 chunkId)
{
- yaffs_Object *obj;
- int i;
- struct ylist_head *lh;
+ yaffs_Tnode *tn = fStruct->top;
+ __u32 i;
+ int requiredTallness;
+ int level = fStruct->topLevel;
- if (yaffs_SkipVerification(dev))
- return;
+ dev=dev;
- /* Iterate through the objects in each hash entry */
+ /* Check sane level and chunk Id */
+ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
+ return NULL;
- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
- ylist_for_each(lh, &dev->objectBucket[i].list) {
- if (lh) {
- obj = ylist_entry(lh, yaffs_Object, hashLink);
- yaffs_VerifyObject(obj);
- }
- }
+ if (chunkId > YAFFS_MAX_CHUNK_ID)
+ return NULL;
+
+ /* First check we're tall enough (ie enough topLevel) */
+
+ i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
+ requiredTallness = 0;
+ while (i) {
+ i >>= YAFFS_TNODES_INTERNAL_BITS;
+ requiredTallness++;
}
-}
+ if (requiredTallness > fStruct->topLevel)
+ return NULL; /* Not tall enough, so we can't find it */
-/*
- * Simple hash function. Needs to have a reasonable spread
- */
+ /* Traverse down to level 0 */
+ while (level > 0 && tn) {
+ tn = tn->internal[(chunkId >>
+ (YAFFS_TNODES_LEVEL0_BITS +
+ (level - 1) *
+ YAFFS_TNODES_INTERNAL_BITS)) &
+ YAFFS_TNODES_INTERNAL_MASK];
+ level--;
+ }
-static Y_INLINE int yaffs_HashFunction(int n)
-{
- n = abs(n);
- return n % YAFFS_NOBJECT_BUCKETS;
+ return tn;
}
-/*
- * Access functions to useful fake objects.
- * Note that root might have a presence in NAND if permissions are set.
+/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
+ * This happens in two steps:
+ * 1. If the tree isn't tall enough, then make it taller.
+ * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
+ *
+ * Used when modifying the tree.
+ *
+ * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
+ * be plugged into the ttree.
*/
-yaffs_Object *yaffs_Root(yaffs_Device *dev)
+yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
+ yaffs_FileStructure *fStruct,
+ __u32 chunkId,
+ yaffs_Tnode *passedTn)
{
- return dev->rootDir;
-}
+ int requiredTallness;
+ int i;
+ int l;
+ yaffs_Tnode *tn;
-yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
-{
- return dev->lostNFoundDir;
-}
+ __u32 x;
-/*
- * Erased NAND checking functions
- */
+ /* Check sane level and page Id */
+ if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
+ return NULL;
-int yaffs_CheckFF(__u8 *buffer, int nBytes)
-{
- /* Horrible, slow implementation */
- while (nBytes--) {
- if (*buffer != 0xFF)
- return 0;
- buffer++;
- }
- return 1;
-}
-
-static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
- int chunkInNAND)
-{
- int retval = YAFFS_OK;
- __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
- yaffs_ExtendedTags tags;
- int result;
-
- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
-
- if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
- retval = YAFFS_FAIL;
-
- if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
- T(YAFFS_TRACE_NANDACCESS,
- (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
- retval = YAFFS_FAIL;
- }
-
- yaffs_ReleaseTempBuffer(dev, data, __LINE__);
-
- return retval;
-
-}
-
-static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
- const __u8 *data,
- yaffs_ExtendedTags *tags,
- int useReserve)
-{
- int attempts = 0;
- int writeOk = 0;
- int chunk;
-
- yaffs_InvalidateCheckpoint(dev);
-
- do {
- yaffs_BlockInfo *bi = 0;
- int erasedOk = 0;
-
- chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
- if (chunk < 0) {
- /* no space */
- break;
- }
-
- /* First check this chunk is erased, if it needs
- * checking. The checking policy (unless forced
- * always on) is as follows:
- *
- * Check the first page we try to write in a block.
- * If the check passes then we don't need to check any
- * more. If the check fails, we check again...
- * If the block has been erased, we don't need to check.
- *
- * However, if the block has been prioritised for gc,
- * then we think there might be something odd about
- * this block and stop using it.
- *
- * Rationale: We should only ever see chunks that have
- * not been erased if there was a partially written
- * chunk due to power loss. This checking policy should
- * catch that case with very few checks and thus save a
- * lot of checks that are most likely not needed.
- */
- if (bi->gcPrioritise) {
- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
- /* try another chunk */
- continue;
- }
-
- /* let's give it a try */
- attempts++;
-
-#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
- bi->skipErasedCheck = 0;
-#endif
- if (!bi->skipErasedCheck) {
- erasedOk = yaffs_CheckChunkErased(dev, chunk);
- if (erasedOk != YAFFS_OK) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs chunk %d was not erased"
- TENDSTR), chunk));
-
- /* try another chunk */
- continue;
- }
- bi->skipErasedCheck = 1;
- }
-
- writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
- data, tags);
- if (writeOk != YAFFS_OK) {
- yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
- /* try another chunk */
- continue;
- }
-
- /* Copy the data into the robustification buffer */
- yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
-
- } while (writeOk != YAFFS_OK &&
- (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
-
- if (!writeOk)
- chunk = -1;
-
- if (attempts > 1) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs write required %d attempts" TENDSTR),
- attempts));
-
- dev->nRetriedWrites += (attempts - 1);
- }
-
- return chunk;
-}
-
-/*
- * Block retiring for handling a broken block.
- */
-
-static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
-{
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
-
- yaffs_InvalidateCheckpoint(dev);
-
- if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
- if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
- T(YAFFS_TRACE_ALWAYS, (TSTR(
- "yaffs: Failed to mark bad and erase block %d"
- TENDSTR), blockInNAND));
- } else {
- yaffs_ExtendedTags tags;
- int chunkId = blockInNAND * dev->nChunksPerBlock;
-
- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
-
- memset(buffer, 0xff, dev->nDataBytesPerChunk);
- yaffs_InitialiseTags(&tags);
- tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
- if (dev->writeChunkWithTagsToNAND(dev, chunkId -
- dev->chunkOffset, buffer, &tags) != YAFFS_OK)
- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
- TCONT("write bad block marker to block %d")
- TENDSTR), blockInNAND));
-
- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
- }
- }
-
- bi->blockState = YAFFS_BLOCK_STATE_DEAD;
- bi->gcPrioritise = 0;
- bi->needsRetiring = 0;
-
- dev->nRetiredBlocks++;
-}
-
-/*
- * Functions for robustisizing TODO
- *
- */
-
-static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
- const __u8 *data,
- const yaffs_ExtendedTags *tags)
-{
-}
-
-static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
- const yaffs_ExtendedTags *tags)
-{
-}
-
-void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
-{
- if (!bi->gcPrioritise) {
- bi->gcPrioritise = 1;
- dev->hasPendingPrioritisedGCs = 1;
- bi->chunkErrorStrikes++;
-
- if (bi->chunkErrorStrikes > 3) {
- bi->needsRetiring = 1; /* Too many stikes, so retire this */
- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
-
- }
- }
-}
-
-static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
- int erasedOk)
-{
- int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
-
- yaffs_HandleChunkError(dev, bi);
-
- if (erasedOk) {
- /* Was an actual write failure, so mark the block for retirement */
- bi->needsRetiring = 1;
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
- }
-
- /* Delete the chunk */
- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
-}
-
-
-/*---------------- Name handling functions ------------*/
-
-static __u16 yaffs_CalcNameSum(const YCHAR *name)
-{
- __u16 sum = 0;
- __u16 i = 1;
-
- const YUCHAR *bname = (const YUCHAR *) name;
- if (bname) {
- while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
-
-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
- sum += yaffs_toupper(*bname) * i;
-#else
- sum += (*bname) * i;
-#endif
- i++;
- bname++;
- }
- }
- return sum;
-}
-
-static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
-{
-#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
- memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
- if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH)
- yaffs_strcpy(obj->shortName, name);
- else
- obj->shortName[0] = _Y('\0');
-#endif
- obj->sum = yaffs_CalcNameSum(name);
-}
-
-/*-------------------- TNODES -------------------
-
- * List of spare tnodes
- * The list is hooked together using the first pointer
- * in the tnode.
- */
-
-/* yaffs_CreateTnodes creates a bunch more tnodes and
- * adds them to the tnode free list.
- * Don't use this function directly
- */
-
-static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
-{
- int i;
- int tnodeSize;
- yaffs_Tnode *newTnodes;
- __u8 *mem;
- yaffs_Tnode *curr;
- yaffs_Tnode *next;
- yaffs_TnodeList *tnl;
-
- if (nTnodes < 1)
- return YAFFS_OK;
-
- /* Calculate the tnode size in bytes for variable width tnode support.
- * Must be a multiple of 32-bits */
- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
- /* make these things */
-
- newTnodes = YMALLOC(nTnodes * tnodeSize);
- mem = (__u8 *)newTnodes;
-
- if (!newTnodes) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
- return YAFFS_FAIL;
- }
-
- /* Hook them into the free list */
-#if 0
- for (i = 0; i < nTnodes - 1; i++) {
- newTnodes[i].internal[0] = &newTnodes[i + 1];
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- }
-
- newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- dev->freeTnodes = newTnodes;
-#else
- /* New hookup for wide tnodes */
- for (i = 0; i < nTnodes - 1; i++) {
- curr = (yaffs_Tnode *) &mem[i * tnodeSize];
- next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
- curr->internal[0] = next;
- }
-
- curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
- curr->internal[0] = dev->freeTnodes;
- dev->freeTnodes = (yaffs_Tnode *)mem;
-
-#endif
-
-
- dev->nFreeTnodes += nTnodes;
- dev->nTnodesCreated += nTnodes;
-
- /* Now add this bunch of tnodes to a list for freeing up.
- * NB If we can't add this to the management list it isn't fatal
- * but it just means we can't free this bunch of tnodes later.
- */
-
- tnl = YMALLOC(sizeof(yaffs_TnodeList));
- if (!tnl) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs: Could not add tnodes to management list" TENDSTR)));
- return YAFFS_FAIL;
- } else {
- tnl->tnodes = newTnodes;
- tnl->next = dev->allocatedTnodeList;
- dev->allocatedTnodeList = tnl;
- }
-
- T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
-
- return YAFFS_OK;
-}
-
-/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
-
-static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
-{
- yaffs_Tnode *tn = NULL;
-
- /* If there are none left make more */
- if (!dev->freeTnodes)
- yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
-
- if (dev->freeTnodes) {
- tn = dev->freeTnodes;
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
- /* Hoosterman, this thing looks like it isn't in the list */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
- }
-#endif
- dev->freeTnodes = dev->freeTnodes->internal[0];
- dev->nFreeTnodes--;
- }
-
- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
-
- return tn;
-}
-
-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
-{
- yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
- if (tn)
- memset(tn, 0, tnodeSize);
-
- return tn;
-}
-
-/* FreeTnode frees up a tnode and puts it back on the free list */
-static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
-{
- if (tn) {
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
- /* Hoosterman, this thing looks like it is already in the list */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
- }
- tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- tn->internal[0] = dev->freeTnodes;
- dev->freeTnodes = tn;
- dev->nFreeTnodes++;
- }
- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
-}
-
-static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
-{
- /* Free the list of allocated tnodes */
- yaffs_TnodeList *tmp;
-
- while (dev->allocatedTnodeList) {
- tmp = dev->allocatedTnodeList->next;
-
- YFREE(dev->allocatedTnodeList->tnodes);
- YFREE(dev->allocatedTnodeList);
- dev->allocatedTnodeList = tmp;
-
- }
-
- dev->freeTnodes = NULL;
- dev->nFreeTnodes = 0;
-}
-
-static void yaffs_InitialiseTnodes(yaffs_Device *dev)
-{
- dev->allocatedTnodeList = NULL;
- dev->freeTnodes = NULL;
- dev->nFreeTnodes = 0;
- dev->nTnodesCreated = 0;
-}
-
-
-void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
- unsigned val)
-{
- __u32 *map = (__u32 *)tn;
- __u32 bitInMap;
- __u32 bitInWord;
- __u32 wordInMap;
- __u32 mask;
-
- pos &= YAFFS_TNODES_LEVEL0_MASK;
- val >>= dev->chunkGroupBits;
-
- bitInMap = pos * dev->tnodeWidth;
- wordInMap = bitInMap / 32;
- bitInWord = bitInMap & (32 - 1);
-
- mask = dev->tnodeMask << bitInWord;
-
- map[wordInMap] &= ~mask;
- map[wordInMap] |= (mask & (val << bitInWord));
-
- if (dev->tnodeWidth > (32 - bitInWord)) {
- bitInWord = (32 - bitInWord);
- wordInMap++;;
- mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
- map[wordInMap] &= ~mask;
- map[wordInMap] |= (mask & (val >> bitInWord));
- }
-}
-
-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
- unsigned pos)
-{
- __u32 *map = (__u32 *)tn;
- __u32 bitInMap;
- __u32 bitInWord;
- __u32 wordInMap;
- __u32 val;
-
- pos &= YAFFS_TNODES_LEVEL0_MASK;
-
- bitInMap = pos * dev->tnodeWidth;
- wordInMap = bitInMap / 32;
- bitInWord = bitInMap & (32 - 1);
-
- val = map[wordInMap] >> bitInWord;
-
- if (dev->tnodeWidth > (32 - bitInWord)) {
- bitInWord = (32 - bitInWord);
- wordInMap++;;
- val |= (map[wordInMap] << bitInWord);
- }
-
- val &= dev->tnodeMask;
- val <<= dev->chunkGroupBits;
-
- return val;
-}
-
-/* ------------------- End of individual tnode manipulation -----------------*/
-
-/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
- * The look up tree is represented by the top tnode and the number of topLevel
- * in the tree. 0 means only the level 0 tnode is in the tree.
- */
-
-/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
- yaffs_FileStructure *fStruct,
- __u32 chunkId)
-{
- yaffs_Tnode *tn = fStruct->top;
- __u32 i;
- int requiredTallness;
- int level = fStruct->topLevel;
-
- /* Check sane level and chunk Id */
- if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
- return NULL;
-
- if (chunkId > YAFFS_MAX_CHUNK_ID)
- return NULL;
-
- /* First check we're tall enough (ie enough topLevel) */
-
- i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
- requiredTallness = 0;
- while (i) {
- i >>= YAFFS_TNODES_INTERNAL_BITS;
- requiredTallness++;
- }
-
- if (requiredTallness > fStruct->topLevel)
- return NULL; /* Not tall enough, so we can't find it */
-
- /* Traverse down to level 0 */
- while (level > 0 && tn) {
- tn = tn->internal[(chunkId >>
- (YAFFS_TNODES_LEVEL0_BITS +
- (level - 1) *
- YAFFS_TNODES_INTERNAL_BITS)) &
- YAFFS_TNODES_INTERNAL_MASK];
- level--;
- }
-
- return tn;
-}
-
-/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
- * This happens in two steps:
- * 1. If the tree isn't tall enough, then make it taller.
- * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
- *
- * Used when modifying the tree.
- *
- * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
- * be plugged into the ttree.
- */
-
-static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
- yaffs_FileStructure *fStruct,
- __u32 chunkId,
- yaffs_Tnode *passedTn)
-{
- int requiredTallness;
- int i;
- int l;
- yaffs_Tnode *tn;
-
- __u32 x;
-
-
- /* Check sane level and page Id */
- if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
- return NULL;
-
- if (chunkId > YAFFS_MAX_CHUNK_ID)
- return NULL;
-
- /* First check we're tall enough (ie enough topLevel) */
-
- x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
- requiredTallness = 0;
- while (x) {
- x >>= YAFFS_TNODES_INTERNAL_BITS;
- requiredTallness++;
- }
-
-
- if (requiredTallness > fStruct->topLevel) {
- /* Not tall enough, gotta make the tree taller */
- for (i = fStruct->topLevel; i < requiredTallness; i++) {
-
- tn = yaffs_GetTnode(dev);
-
- if (tn) {
- tn->internal[0] = fStruct->top;
- fStruct->top = tn;
- } else {
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs: no more tnodes" TENDSTR)));
- }
- }
-
- fStruct->topLevel = requiredTallness;
- }
-
- /* Traverse down to level 0, adding anything we need */
-
- l = fStruct->topLevel;
- tn = fStruct->top;
-
- if (l > 0) {
- while (l > 0 && tn) {
- x = (chunkId >>
- (YAFFS_TNODES_LEVEL0_BITS +
- (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
- YAFFS_TNODES_INTERNAL_MASK;
-
-
- if ((l > 1) && !tn->internal[x]) {
- /* Add missing non-level-zero tnode */
- tn->internal[x] = yaffs_GetTnode(dev);
-
- } else if (l == 1) {
- /* Looking from level 1 at level 0 */
- if (passedTn) {
- /* If we already have one, then release it.*/
- if (tn->internal[x])
- yaffs_FreeTnode(dev, tn->internal[x]);
- tn->internal[x] = passedTn;
-
- } else if (!tn->internal[x]) {
- /* Don't have one, none passed in */
- tn->internal[x] = yaffs_GetTnode(dev);
- }
- }
-
- tn = tn->internal[x];
- l--;
- }
- } else {
- /* top is level 0 */
- if (passedTn) {
- memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
- yaffs_FreeTnode(dev, passedTn);
- }
- }
-
- return tn;
-}
-
-static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
- yaffs_ExtendedTags *tags, int objectId,
- int chunkInInode)
-{
- int j;
-
- for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
- if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock,
- theChunk % dev->nChunksPerBlock)) {
- yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
- tags);
- if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
- /* found it; */
- return theChunk;
- }
- }
- theChunk++;
- }
- return -1;
-}
-
-
-/* DeleteWorker scans backwards through the tnode tree and deletes all the
- * chunks and tnodes in the file
- * Returns 1 if the tree was deleted.
- * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
- */
-
-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
- int chunkOffset, int *limit)
-{
- int i;
- int chunkInInode;
- int theChunk;
- yaffs_ExtendedTags tags;
- int foundChunk;
- yaffs_Device *dev = in->myDev;
-
- int allDone = 1;
-
- if (tn) {
- if (level > 0) {
- for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
- i--) {
- if (tn->internal[i]) {
- if (limit && (*limit) < 0) {
- allDone = 0;
- } else {
- allDone =
- yaffs_DeleteWorker(in,
- tn->
- internal
- [i],
- level -
- 1,
- (chunkOffset
- <<
- YAFFS_TNODES_INTERNAL_BITS)
- + i,
- limit);
- }
- if (allDone) {
- yaffs_FreeTnode(dev,
- tn->
- internal[i]);
- tn->internal[i] = NULL;
- }
- }
- }
- return (allDone) ? 1 : 0;
- } else if (level == 0) {
- int hitLimit = 0;
-
- for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
- i--) {
- theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
- if (theChunk) {
-
- chunkInInode = (chunkOffset <<
- YAFFS_TNODES_LEVEL0_BITS) + i;
-
- foundChunk =
- yaffs_FindChunkInGroup(dev,
- theChunk,
- &tags,
- in->objectId,
- chunkInInode);
-
- if (foundChunk > 0) {
- yaffs_DeleteChunk(dev,
- foundChunk, 1,
- __LINE__);
- in->nDataChunks--;
- if (limit) {
- *limit = *limit - 1;
- if (*limit <= 0)
- hitLimit = 1;
- }
-
- }
-
- yaffs_PutLevel0Tnode(dev, tn, i, 0);
- }
-
- }
- return (i < 0) ? 1 : 0;
-
- }
-
- }
-
- return 1;
-
-}
-
-static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
-{
- yaffs_BlockInfo *theBlock;
-
- T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
-
- theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock);
- if (theBlock) {
- theBlock->softDeletions++;
- dev->nFreeChunks++;
- }
-}
-
-/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
- * All soft deleting does is increment the block's softdelete count and pulls the chunk out
- * of the tnode.
- * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
- */
-
-static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
- __u32 level, int chunkOffset)
-{
- int i;
- int theChunk;
- int allDone = 1;
- yaffs_Device *dev = in->myDev;
-
- if (tn) {
- if (level > 0) {
-
- for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
- i--) {
- if (tn->internal[i]) {
- allDone =
- yaffs_SoftDeleteWorker(in,
- tn->
- internal[i],
- level - 1,
- (chunkOffset
- <<
- YAFFS_TNODES_INTERNAL_BITS)
- + i);
- if (allDone) {
- yaffs_FreeTnode(dev,
- tn->
- internal[i]);
- tn->internal[i] = NULL;
- } else {
- /* Hoosterman... how could this happen? */
- }
- }
- }
- return (allDone) ? 1 : 0;
- } else if (level == 0) {
-
- for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
- theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
- if (theChunk) {
- /* Note this does not find the real chunk, only the chunk group.
- * We make an assumption that a chunk group is not larger than
- * a block.
- */
- yaffs_SoftDeleteChunk(dev, theChunk);
- yaffs_PutLevel0Tnode(dev, tn, i, 0);
- }
-
- }
- return 1;
-
- }
-
- }
-
- return 1;
-
-}
-
-static void yaffs_SoftDeleteFile(yaffs_Object *obj)
-{
- if (obj->deleted &&
- obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
- if (obj->nDataChunks <= 0) {
- /* Empty file with no duplicate object headers, just delete it immediately */
- yaffs_FreeTnode(obj->myDev,
- obj->variant.fileVariant.top);
- obj->variant.fileVariant.top = NULL;
- T(YAFFS_TRACE_TRACING,
- (TSTR("yaffs: Deleting empty file %d" TENDSTR),
- obj->objectId));
- yaffs_DoGenericObjectDeletion(obj);
- } else {
- yaffs_SoftDeleteWorker(obj,
- obj->variant.fileVariant.top,
- obj->variant.fileVariant.
- topLevel, 0);
- obj->softDeleted = 1;
- }
- }
-}
-
-/* Pruning removes any part of the file structure tree that is beyond the
- * bounds of the file (ie that does not point to chunks).
- *
- * A file should only get pruned when its size is reduced.
- *
- * Before pruning, the chunks must be pulled from the tree and the
- * level 0 tnode entries must be zeroed out.
- * Could also use this for file deletion, but that's probably better handled
- * by a special case.
- */
-
-static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
- __u32 level, int del0)
-{
- int i;
- int hasData;
-
- if (tn) {
- hasData = 0;
-
- for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
- if (tn->internal[i] && level > 0) {
- tn->internal[i] =
- yaffs_PruneWorker(dev, tn->internal[i],
- level - 1,
- (i == 0) ? del0 : 1);
- }
-
- if (tn->internal[i])
- hasData++;
- }
-
- if (hasData == 0 && del0) {
- /* Free and return NULL */
-
- yaffs_FreeTnode(dev, tn);
- tn = NULL;
- }
-
- }
-
- return tn;
-
-}
-
-static int yaffs_PruneFileStructure(yaffs_Device *dev,
- yaffs_FileStructure *fStruct)
-{
- int i;
- int hasData;
- int done = 0;
- yaffs_Tnode *tn;
-
- if (fStruct->topLevel > 0) {
- fStruct->top =
- yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
-
- /* Now we have a tree with all the non-zero branches NULL but the height
- * is the same as it was.
- * Let's see if we can trim internal tnodes to shorten the tree.
- * We can do this if only the 0th element in the tnode is in use
- * (ie all the non-zero are NULL)
- */
-
- while (fStruct->topLevel && !done) {
- tn = fStruct->top;
-
- hasData = 0;
- for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
- if (tn->internal[i])
- hasData++;
- }
-
- if (!hasData) {
- fStruct->top = tn->internal[0];
- fStruct->topLevel--;
- yaffs_FreeTnode(dev, tn);
- } else {
- done = 1;
- }
- }
- }
-
- return YAFFS_OK;
-}
-
-/*-------------------- End of File Structure functions.-------------------*/
-
-/* yaffs_CreateFreeObjects creates a bunch more objects and
- * adds them to the object free list.
- */
-static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
-{
- int i;
- yaffs_Object *newObjects;
- yaffs_ObjectList *list;
-
- if (nObjects < 1)
- return YAFFS_OK;
-
- /* make these things */
- newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
- list = YMALLOC(sizeof(yaffs_ObjectList));
-
- if (!newObjects || !list) {
- if (newObjects)
- YFREE(newObjects);
- if (list)
- YFREE(list);
- T(YAFFS_TRACE_ALLOCATE,
- (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
- return YAFFS_FAIL;
- }
-
- /* Hook them into the free list */
- for (i = 0; i < nObjects - 1; i++) {
- newObjects[i].siblings.next =
- (struct ylist_head *)(&newObjects[i + 1]);
- }
-
- newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
- dev->freeObjects = newObjects;
- dev->nFreeObjects += nObjects;
- dev->nObjectsCreated += nObjects;
-
- /* Now add this bunch of Objects to a list for freeing up. */
-
- list->objects = newObjects;
- list->next = dev->allocatedObjectList;
- dev->allocatedObjectList = list;
-
- return YAFFS_OK;
-}
-
-
-/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
-static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
-{
- yaffs_Object *tn = NULL;
-
-#ifdef VALGRIND_TEST
- tn = YMALLOC(sizeof(yaffs_Object));
-#else
- /* If there are none left make more */
- if (!dev->freeObjects)
- yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
-
- if (dev->freeObjects) {
- tn = dev->freeObjects;
- dev->freeObjects =
- (yaffs_Object *) (dev->freeObjects->siblings.next);
- dev->nFreeObjects--;
- }
-#endif
- if (tn) {
- /* Now sweeten it up... */
-
- memset(tn, 0, sizeof(yaffs_Object));
- tn->beingCreated = 1;
-
- tn->myDev = dev;
- tn->hdrChunk = 0;
- tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
- YINIT_LIST_HEAD(&(tn->hardLinks));
- YINIT_LIST_HEAD(&(tn->hashLink));
- YINIT_LIST_HEAD(&tn->siblings);
-
-
- /* Now make the directory sane */
- if (dev->rootDir) {
- tn->parent = dev->rootDir;
- ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
- }
-
- /* Add it to the lost and found directory.
- * NB Can't put root or lostNFound in lostNFound so
- * check if lostNFound exists first
- */
- if (dev->lostNFoundDir)
- yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
-
- tn->beingCreated = 0;
- }
-
- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
-
- return tn;
-}
-
-static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
- __u32 mode)
-{
-
- yaffs_Object *obj =
- yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
- if (obj) {
- obj->fake = 1; /* it is fake so it might have no NAND presence... */
- obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
- obj->unlinkAllowed = 0; /* ... or unlink it */
- obj->deleted = 0;
- obj->unlinked = 0;
- obj->yst_mode = mode;
- obj->myDev = dev;
- obj->hdrChunk = 0; /* Not a valid chunk. */
- }
-
- return obj;
-
-}
-
-static void yaffs_UnhashObject(yaffs_Object *tn)
-{
- int bucket;
- yaffs_Device *dev = tn->myDev;
-
- /* If it is still linked into the bucket list, free from the list */
- if (!ylist_empty(&tn->hashLink)) {
- ylist_del_init(&tn->hashLink);
- bucket = yaffs_HashFunction(tn->objectId);
- dev->objectBucket[bucket].count--;
- }
-}
-
-/* FreeObject frees up a Object and puts it back on the free list */
-static void yaffs_FreeObject(yaffs_Object *tn)
-{
- yaffs_Device *dev = tn->myDev;
-
-#ifdef __KERNEL__
- T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
-#endif
-
- if (tn->parent)
- YBUG();
- if (!ylist_empty(&tn->siblings))
- YBUG();
-
-
-#ifdef __KERNEL__
- if (tn->myInode) {
- /* We're still hooked up to a cached inode.
- * Don't delete now, but mark for later deletion
- */
- tn->deferedFree = 1;
- return;
- }
-#endif
-
- yaffs_UnhashObject(tn);
-
-#ifdef VALGRIND_TEST
- YFREE(tn);
-#else
- /* Link into the free list. */
- tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
- dev->freeObjects = tn;
- dev->nFreeObjects++;
-#endif
- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
-}
-
-#ifdef __KERNEL__
-
-void yaffs_HandleDeferedFree(yaffs_Object *obj)
-{
- if (obj->deferedFree)
- yaffs_FreeObject(obj);
-}
-
-#endif
-
-static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
-{
- /* Free the list of allocated Objects */
-
- yaffs_ObjectList *tmp;
-
- while (dev->allocatedObjectList) {
- tmp = dev->allocatedObjectList->next;
- YFREE(dev->allocatedObjectList->objects);
- YFREE(dev->allocatedObjectList);
-
- dev->allocatedObjectList = tmp;
- }
-
- dev->freeObjects = NULL;
- dev->nFreeObjects = 0;
-}
-
-static void yaffs_InitialiseObjects(yaffs_Device *dev)
-{
- int i;
-
- dev->allocatedObjectList = NULL;
- dev->freeObjects = NULL;
- dev->nFreeObjects = 0;
-
- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
- YINIT_LIST_HEAD(&dev->objectBucket[i].list);
- dev->objectBucket[i].count = 0;
- }
-}
-
-static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
-{
- static int x;
- int i;
- int l = 999;
- int lowest = 999999;
-
- /* First let's see if we can find one that's empty. */
-
- for (i = 0; i < 10 && lowest > 0; i++) {
- x++;
- x %= YAFFS_NOBJECT_BUCKETS;
- if (dev->objectBucket[x].count < lowest) {
- lowest = dev->objectBucket[x].count;
- l = x;
- }
-
- }
-
- /* If we didn't find an empty list, then try
- * looking a bit further for a short one
- */
-
- for (i = 0; i < 10 && lowest > 3; i++) {
- x++;
- x %= YAFFS_NOBJECT_BUCKETS;
- if (dev->objectBucket[x].count < lowest) {
- lowest = dev->objectBucket[x].count;
- l = x;
- }
-
- }
-
- return l;
-}
-
-static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
-{
- int bucket = yaffs_FindNiceObjectBucket(dev);
-
- /* Now find an object value that has not already been taken
- * by scanning the list.
- */
-
- int found = 0;
- struct ylist_head *i;
-
- __u32 n = (__u32) bucket;
-
- /* yaffs_CheckObjectHashSanity(); */
-
- while (!found) {
- found = 1;
- n += YAFFS_NOBJECT_BUCKETS;
- if (1 || dev->objectBucket[bucket].count > 0) {
- ylist_for_each(i, &dev->objectBucket[bucket].list) {
- /* If there is already one in the list */
- if (i && ylist_entry(i, yaffs_Object,
- hashLink)->objectId == n) {
- found = 0;
- }
- }
- }
- }
-
- return n;
-}
-
-static void yaffs_HashObject(yaffs_Object *in)
-{
- int bucket = yaffs_HashFunction(in->objectId);
- yaffs_Device *dev = in->myDev;
-
- ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
- dev->objectBucket[bucket].count++;
-}
-
-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
-{
- int bucket = yaffs_HashFunction(number);
- struct ylist_head *i;
- yaffs_Object *in;
-
- ylist_for_each(i, &dev->objectBucket[bucket].list) {
- /* Look if it is in the list */
- if (i) {
- in = ylist_entry(i, yaffs_Object, hashLink);
- if (in->objectId == number) {
-#ifdef __KERNEL__
- /* Don't tell the VFS about this one if it is defered free */
- if (in->deferedFree)
- return NULL;
-#endif
-
- return in;
- }
- }
- }
-
- return NULL;
-}
-
-yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
- yaffs_ObjectType type)
-{
- yaffs_Object *theObject;
- yaffs_Tnode *tn = NULL;
-
- if (number < 0)
- number = yaffs_CreateNewObjectNumber(dev);
-
- theObject = yaffs_AllocateEmptyObject(dev);
- if (!theObject)
- return NULL;
-
- if (type == YAFFS_OBJECT_TYPE_FILE) {
- tn = yaffs_GetTnode(dev);
- if (!tn) {
- yaffs_FreeObject(theObject);
- return NULL;
- }
- }
-
- if (theObject) {
- theObject->fake = 0;
- theObject->renameAllowed = 1;
- theObject->unlinkAllowed = 1;
- theObject->objectId = number;
- yaffs_HashObject(theObject);
- theObject->variantType = type;
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_WinFileTimeNow(theObject->win_atime);
- theObject->win_ctime[0] = theObject->win_mtime[0] =
- theObject->win_atime[0];
- theObject->win_ctime[1] = theObject->win_mtime[1] =
- theObject->win_atime[1];
-
-#else
-
- theObject->yst_atime = theObject->yst_mtime =
- theObject->yst_ctime = Y_CURRENT_TIME;
-#endif
- switch (type) {
- case YAFFS_OBJECT_TYPE_FILE:
- theObject->variant.fileVariant.fileSize = 0;
- theObject->variant.fileVariant.scannedFileSize = 0;
- theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
- theObject->variant.fileVariant.topLevel = 0;
- theObject->variant.fileVariant.top = tn;
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
- children);
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- case YAFFS_OBJECT_TYPE_HARDLINK:
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* No action required */
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* todo this should not happen */
- break;
- }
- }
-
- return theObject;
-}
-
-static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
- int number,
- yaffs_ObjectType type)
-{
- yaffs_Object *theObject = NULL;
-
- if (number > 0)
- theObject = yaffs_FindObjectByNumber(dev, number);
-
- if (!theObject)
- theObject = yaffs_CreateNewObject(dev, number, type);
-
- return theObject;
-
-}
-
-
-static YCHAR *yaffs_CloneString(const YCHAR *str)
-{
- YCHAR *newStr = NULL;
-
- if (str && *str) {
- newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
- if (newStr)
- yaffs_strcpy(newStr, str);
- }
-
- return newStr;
-
-}
-
-/*
- * Mknod (create) a new object.
- * equivalentObject only has meaning for a hard link;
- * aliasString only has meaning for a sumlink.
- * rdev only has meaning for devices (a subset of special objects)
- */
-
-static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
- yaffs_Object *parent,
- const YCHAR *name,
- __u32 mode,
- __u32 uid,
- __u32 gid,
- yaffs_Object *equivalentObject,
- const YCHAR *aliasString, __u32 rdev)
-{
- yaffs_Object *in;
- YCHAR *str = NULL;
-
- yaffs_Device *dev = parent->myDev;
-
- /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
- if (yaffs_FindObjectByName(parent, name))
- return NULL;
-
- in = yaffs_CreateNewObject(dev, -1, type);
-
- if (!in)
- return YAFFS_FAIL;
-
- if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
- str = yaffs_CloneString(aliasString);
- if (!str) {
- yaffs_FreeObject(in);
- return NULL;
- }
- }
-
-
-
- if (in) {
- in->hdrChunk = 0;
- in->valid = 1;
- in->variantType = type;
-
- in->yst_mode = mode;
-
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_WinFileTimeNow(in->win_atime);
- in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
- in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
-
-#else
- in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
-
- in->yst_rdev = rdev;
- in->yst_uid = uid;
- in->yst_gid = gid;
-#endif
- in->nDataChunks = 0;
-
- yaffs_SetObjectName(in, name);
- in->dirty = 1;
-
- yaffs_AddObjectToDirectory(parent, in);
-
- in->myDev = parent->myDev;
-
- switch (type) {
- case YAFFS_OBJECT_TYPE_SYMLINK:
- in->variant.symLinkVariant.alias = str;
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- in->variant.hardLinkVariant.equivalentObject =
- equivalentObject;
- in->variant.hardLinkVariant.equivalentObjectId =
- equivalentObject->objectId;
- ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
- break;
- case YAFFS_OBJECT_TYPE_FILE:
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- case YAFFS_OBJECT_TYPE_SPECIAL:
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* do nothing */
- break;
- }
-
- if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
- /* Could not create the object header, fail the creation */
- yaffs_DeleteObject(in);
- in = NULL;
- }
-
- }
-
- return in;
-}
-
-yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
- __u32 mode, __u32 uid, __u32 gid)
-{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
- uid, gid, NULL, NULL, 0);
-}
-
-yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
- __u32 mode, __u32 uid, __u32 gid)
-{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
- mode, uid, gid, NULL, NULL, 0);
-}
-
-yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
- __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
-{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
- uid, gid, NULL, NULL, rdev);
-}
-
-yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
- __u32 mode, __u32 uid, __u32 gid,
- const YCHAR *alias)
-{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
- uid, gid, NULL, alias, 0);
-}
-
-/* yaffs_Link returns the object id of the equivalent object.*/
-yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
- yaffs_Object *equivalentObject)
-{
- /* Get the real object in case we were fed a hard link as an equivalent object */
- equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
-
- if (yaffs_MknodObject
- (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
- equivalentObject, NULL, 0)) {
- return equivalentObject;
- } else {
- return NULL;
- }
-
-}
-
-static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
- const YCHAR *newName, int force, int shadows)
-{
- int unlinkOp;
- int deleteOp;
-
- yaffs_Object *existingTarget;
-
- if (newDir == NULL)
- newDir = obj->parent; /* use the old directory */
-
- if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
- TENDSTR)));
- YBUG();
- }
-
- /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
- if (obj->myDev->isYaffs2)
- unlinkOp = (newDir == obj->myDev->unlinkedDir);
- else
- unlinkOp = (newDir == obj->myDev->unlinkedDir
- && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
-
- deleteOp = (newDir == obj->myDev->deletedDir);
-
- existingTarget = yaffs_FindObjectByName(newDir, newName);
-
- /* If the object is a file going into the unlinked directory,
- * then it is OK to just stuff it in since duplicate names are allowed.
- * else only proceed if the new name does not exist and if we're putting
- * it into a directory.
- */
- if ((unlinkOp ||
- deleteOp ||
- force ||
- (shadows > 0) ||
- !existingTarget) &&
- newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
- yaffs_SetObjectName(obj, newName);
- obj->dirty = 1;
-
- yaffs_AddObjectToDirectory(newDir, obj);
-
- if (unlinkOp)
- obj->unlinked = 1;
-
- /* If it is a deletion then we mark it as a shrink for gc purposes. */
- if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
- return YAFFS_OK;
- }
-
- return YAFFS_FAIL;
-}
-
-int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
- yaffs_Object *newDir, const YCHAR *newName)
-{
- yaffs_Object *obj = NULL;
- yaffs_Object *existingTarget = NULL;
- int force = 0;
-
-
- if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
- YBUG();
- if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
- YBUG();
-
-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
- /* Special case for case insemsitive systems (eg. WinCE).
- * While look-up is case insensitive, the name isn't.
- * Therefore we might want to change x.txt to X.txt
- */
- if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
- force = 1;
-#endif
-
- else if (yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
- /* ENAMETOOLONG */
- return YAFFS_FAIL;
-
- obj = yaffs_FindObjectByName(oldDir, oldName);
-
- if (obj && obj->renameAllowed) {
-
- /* Now do the handling for an existing target, if there is one */
-
- existingTarget = yaffs_FindObjectByName(newDir, newName);
- if (existingTarget &&
- existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
- !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
- /* There is a target that is a non-empty directory, so we fail */
- return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
- } else if (existingTarget && existingTarget != obj) {
- /* Nuke the target first, using shadowing,
- * but only if it isn't the same object
- */
- yaffs_ChangeObjectName(obj, newDir, newName, force,
- existingTarget->objectId);
- yaffs_UnlinkObject(existingTarget);
- }
-
- return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
- }
- return YAFFS_FAIL;
-}
-
-/*------------------------- Block Management and Page Allocation ----------------*/
-
-static int yaffs_InitialiseBlocks(yaffs_Device *dev)
-{
- int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
-
- dev->blockInfo = NULL;
- dev->chunkBits = NULL;
-
- dev->allocationBlock = -1; /* force it to get a new one */
-
- /* If the first allocation strategy fails, thry the alternate one */
- dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
- if (!dev->blockInfo) {
- dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
- dev->blockInfoAlt = 1;
- } else
- dev->blockInfoAlt = 0;
-
- if (dev->blockInfo) {
- /* Set up dynamic blockinfo stuff. */
- dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
- dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
- if (!dev->chunkBits) {
- dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
- dev->chunkBitsAlt = 1;
- } else
- dev->chunkBitsAlt = 0;
- }
-
- if (dev->blockInfo && dev->chunkBits) {
- memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
- memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
- return YAFFS_OK;
- }
-
- return YAFFS_FAIL;
-}
-
-static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
-{
- if (dev->blockInfoAlt && dev->blockInfo)
- YFREE_ALT(dev->blockInfo);
- else if (dev->blockInfo)
- YFREE(dev->blockInfo);
-
- dev->blockInfoAlt = 0;
-
- dev->blockInfo = NULL;
-
- if (dev->chunkBitsAlt && dev->chunkBits)
- YFREE_ALT(dev->chunkBits);
- else if (dev->chunkBits)
- YFREE(dev->chunkBits);
- dev->chunkBitsAlt = 0;
- dev->chunkBits = NULL;
-}
-
-static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
- yaffs_BlockInfo *bi)
-{
- int i;
- __u32 seq;
- yaffs_BlockInfo *b;
-
- if (!dev->isYaffs2)
- return 1; /* disqualification only applies to yaffs2. */
-
- if (!bi->hasShrinkHeader)
- return 1; /* can gc */
-
- /* Find the oldest dirty sequence number if we don't know it and save it
- * so we don't have to keep recomputing it.
- */
- if (!dev->oldestDirtySequence) {
- seq = dev->sequenceNumber;
-
- for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
- i++) {
- b = yaffs_GetBlockInfo(dev, i);
- if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
- (b->pagesInUse - b->softDeletions) <
- dev->nChunksPerBlock && b->sequenceNumber < seq) {
- seq = b->sequenceNumber;
- }
- }
- dev->oldestDirtySequence = seq;
- }
-
- /* Can't do gc of this block if there are any blocks older than this one that have
- * discarded pages.
- */
- return (bi->sequenceNumber <= dev->oldestDirtySequence);
-}
-
-/* FindDiretiestBlock is used to select the dirtiest block (or close enough)
- * for garbage collection.
- */
-
-static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
- int aggressive)
-{
- int b = dev->currentDirtyChecker;
-
- int i;
- int iterations;
- int dirtiest = -1;
- int pagesInUse = 0;
- int prioritised = 0;
- yaffs_BlockInfo *bi;
- int pendingPrioritisedExist = 0;
-
- /* First let's see if we need to grab a prioritised block */
- if (dev->hasPendingPrioritisedGCs) {
- for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) {
-
- bi = yaffs_GetBlockInfo(dev, i);
- /* yaffs_VerifyBlock(dev,bi,i); */
-
- if (bi->gcPrioritise) {
- pendingPrioritisedExist = 1;
- if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
- pagesInUse = (bi->pagesInUse - bi->softDeletions);
- dirtiest = i;
- prioritised = 1;
- aggressive = 1; /* Fool the non-aggressive skip logiv below */
- }
- }
- }
-
- if (!pendingPrioritisedExist) /* None found, so we can clear this */
- dev->hasPendingPrioritisedGCs = 0;
- }
-
- /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
- * search harder.
- * else (we're doing a leasurely gc), then we only bother to do this if the
- * block has only a few pages in use.
- */
-
- dev->nonAggressiveSkip--;
-
- if (!aggressive && (dev->nonAggressiveSkip > 0))
- return -1;
-
- if (!prioritised)
- pagesInUse =
- (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
-
- if (aggressive)
- iterations =
- dev->internalEndBlock - dev->internalStartBlock + 1;
- else {
- iterations =
- dev->internalEndBlock - dev->internalStartBlock + 1;
- iterations = iterations / 16;
- if (iterations > 200)
- iterations = 200;
- }
-
- for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
- b++;
- if (b < dev->internalStartBlock || b > dev->internalEndBlock)
- b = dev->internalStartBlock;
-
- if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> Block %d is not valid" TENDSTR), b));
- YBUG();
- }
-
- bi = yaffs_GetBlockInfo(dev, b);
-
- if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
- (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
- dirtiest = b;
- pagesInUse = (bi->pagesInUse - bi->softDeletions);
- }
- }
-
- dev->currentDirtyChecker = b;
-
- if (dirtiest > 0) {
- T(YAFFS_TRACE_GC,
- (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
- dev->nChunksPerBlock - pagesInUse, prioritised));
- }
-
- dev->oldestDirtySequence = 0;
-
- if (dirtiest > 0)
- dev->nonAggressiveSkip = 4;
-
- return dirtiest;
-}
-
-static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
-{
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
-
- int erasedOk = 0;
-
- /* If the block is still healthy erase it and mark as clean.
- * If the block has had a data failure, then retire it.
- */
-
- T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
- (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
- blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
-
- bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
-
- if (!bi->needsRetiring) {
- yaffs_InvalidateCheckpoint(dev);
- erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
- if (!erasedOk) {
- dev->nErasureFailures++;
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
- }
- }
-
- if (erasedOk &&
- ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
- int i;
- for (i = 0; i < dev->nChunksPerBlock; i++) {
- if (!yaffs_CheckChunkErased
- (dev, blockNo * dev->nChunksPerBlock + i)) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- (">>Block %d erasure supposedly OK, but chunk %d not erased"
- TENDSTR), blockNo, i));
- }
- }
- }
-
- if (erasedOk) {
- /* Clean it up... */
- bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
- dev->nErasedBlocks++;
- bi->pagesInUse = 0;
- bi->softDeletions = 0;
- bi->hasShrinkHeader = 0;
- bi->skipErasedCheck = 1; /* This is clean, so no need to check */
- bi->gcPrioritise = 0;
- yaffs_ClearChunkBits(dev, blockNo);
-
- T(YAFFS_TRACE_ERASE,
- (TSTR("Erased block %d" TENDSTR), blockNo));
- } else {
- dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */
-
- yaffs_RetireBlock(dev, blockNo);
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("**>> Block %d retired" TENDSTR), blockNo));
- }
-}
-
-static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
-{
- int i;
-
- yaffs_BlockInfo *bi;
-
- if (dev->nErasedBlocks < 1) {
- /* Hoosterman we've got a problem.
- * Can't get space to gc
- */
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
-
- return -1;
- }
-
- /* Find an empty block. */
-
- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
- dev->allocationBlockFinder++;
- if (dev->allocationBlockFinder < dev->internalStartBlock
- || dev->allocationBlockFinder > dev->internalEndBlock) {
- dev->allocationBlockFinder = dev->internalStartBlock;
- }
-
- bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
-
- if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
- bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
- dev->sequenceNumber++;
- bi->sequenceNumber = dev->sequenceNumber;
- dev->nErasedBlocks--;
- T(YAFFS_TRACE_ALLOCATE,
- (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
- dev->allocationBlockFinder, dev->sequenceNumber,
- dev->nErasedBlocks));
- return dev->allocationBlockFinder;
- }
- }
-
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("yaffs tragedy: no more erased blocks, but there should have been %d"
- TENDSTR), dev->nErasedBlocks));
-
- return -1;
-}
-
-
-
-static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
-{
- if (!dev->nCheckpointBlocksRequired &&
- dev->isYaffs2) {
- /* Not a valid value so recalculate */
- int nBytes = 0;
- int nBlocks;
- int devBlocks = (dev->endBlock - dev->startBlock + 1);
- int tnodeSize;
-
- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
- nBytes += sizeof(yaffs_CheckpointValidity);
- nBytes += sizeof(yaffs_CheckpointDevice);
- nBytes += devBlocks * sizeof(yaffs_BlockInfo);
- nBytes += devBlocks * dev->chunkBitmapStride;
- nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
- nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
- nBytes += sizeof(yaffs_CheckpointValidity);
- nBytes += sizeof(__u32); /* checksum*/
-
- /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
-
- nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
-
- dev->nCheckpointBlocksRequired = nBlocks;
- }
-
- return dev->nCheckpointBlocksRequired;
-}
-
-/*
- * Check if there's space to allocate...
- * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
- */
-static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
-{
- int reservedChunks;
- int reservedBlocks = dev->nReservedBlocks;
- int checkpointBlocks;
-
- if (dev->isYaffs2) {
- checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
- dev->blocksInCheckpoint;
- if (checkpointBlocks < 0)
- checkpointBlocks = 0;
- } else {
- checkpointBlocks = 0;
- }
-
- reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
-
- return (dev->nFreeChunks > reservedChunks);
-}
-
-static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
- yaffs_BlockInfo **blockUsedPtr)
-{
- int retVal;
- yaffs_BlockInfo *bi;
-
- if (dev->allocationBlock < 0) {
- /* Get next block to allocate off */
- dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
- dev->allocationPage = 0;
- }
-
- if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
- /* Not enough space to allocate unless we're allowed to use the reserve. */
- return -1;
- }
-
- if (dev->nErasedBlocks < dev->nReservedBlocks
- && dev->allocationPage == 0) {
- T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
- }
-
- /* Next page please.... */
- if (dev->allocationBlock >= 0) {
- bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
-
- retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
- dev->allocationPage;
- bi->pagesInUse++;
- yaffs_SetChunkBit(dev, dev->allocationBlock,
- dev->allocationPage);
-
- dev->allocationPage++;
-
- dev->nFreeChunks--;
-
- /* If the block is full set the state to full */
- if (dev->allocationPage >= dev->nChunksPerBlock) {
- bi->blockState = YAFFS_BLOCK_STATE_FULL;
- dev->allocationBlock = -1;
- }
-
- if (blockUsedPtr)
- *blockUsedPtr = bi;
-
- return retVal;
- }
-
- T(YAFFS_TRACE_ERROR,
- (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
-
- return -1;
-}
-
-static int yaffs_GetErasedChunks(yaffs_Device *dev)
-{
- int n;
-
- n = dev->nErasedBlocks * dev->nChunksPerBlock;
-
- if (dev->allocationBlock > 0)
- n += (dev->nChunksPerBlock - dev->allocationPage);
-
- return n;
-
-}
-
-static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
- int wholeBlock)
-{
- int oldChunk;
- int newChunk;
- int markNAND;
- int retVal = YAFFS_OK;
- int cleanups = 0;
- int i;
- int isCheckpointBlock;
- int matchingChunk;
- int maxCopies;
-
- int chunksBefore = yaffs_GetErasedChunks(dev);
- int chunksAfter;
-
- yaffs_ExtendedTags tags;
-
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
-
- yaffs_Object *object;
-
- isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
-
- bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
-
- T(YAFFS_TRACE_TRACING,
- (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
- block,
- bi->pagesInUse,
- bi->hasShrinkHeader,
- wholeBlock));
-
- /*yaffs_VerifyFreeChunks(dev); */
-
- bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
-
- /* Take off the number of soft deleted entries because
- * they're going to get really deleted during GC.
- */
- dev->nFreeChunks -= bi->softDeletions;
-
- dev->isDoingGC = 1;
-
- if (isCheckpointBlock ||
- !yaffs_StillSomeChunkBits(dev, block)) {
- T(YAFFS_TRACE_TRACING,
- (TSTR
- ("Collecting block %d that has no chunks in use" TENDSTR),
- block));
- yaffs_BlockBecameDirty(dev, block);
- } else {
-
- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
-
- yaffs_VerifyBlock(dev, bi, block);
-
- maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
- oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
-
- for (/* init already done */;
- retVal == YAFFS_OK &&
- dev->gcChunk < dev->nChunksPerBlock &&
- (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
- maxCopies > 0;
- dev->gcChunk++, oldChunk++) {
- if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
-
- /* This page is in use and might need to be copied off */
-
- maxCopies--;
-
- markNAND = 1;
-
- yaffs_InitialiseTags(&tags);
-
- yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
- buffer, &tags);
-
- object =
- yaffs_FindObjectByNumber(dev,
- tags.objectId);
-
- T(YAFFS_TRACE_GC_DETAIL,
- (TSTR
- ("Collecting chunk in block %d, %d %d %d " TENDSTR),
- dev->gcChunk, tags.objectId, tags.chunkId,
- tags.byteCount));
-
- if (object && !yaffs_SkipVerification(dev)) {
- if (tags.chunkId == 0)
- matchingChunk = object->hdrChunk;
- else if (object->softDeleted)
- matchingChunk = oldChunk; /* Defeat the test */
- else
- matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
-
- if (oldChunk != matchingChunk)
- T(YAFFS_TRACE_ERROR,
- (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
- oldChunk, matchingChunk, tags.objectId, tags.chunkId));
-
- }
-
- if (!object) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("page %d in gc has no object: %d %d %d "
- TENDSTR), oldChunk,
- tags.objectId, tags.chunkId, tags.byteCount));
- }
-
- if (object &&
- object->deleted &&
- object->softDeleted &&
- tags.chunkId != 0) {
- /* Data chunk in a soft deleted file, throw it away
- * It's a soft deleted data chunk,
- * No need to copy this, just forget about it and
- * fix up the object.
- */
-
- object->nDataChunks--;
-
- if (object->nDataChunks <= 0) {
- /* remeber to clean up the object */
- dev->gcCleanupList[cleanups] =
- tags.objectId;
- cleanups++;
- }
- markNAND = 0;
- } else if (0) {
- /* Todo object && object->deleted && object->nDataChunks == 0 */
- /* Deleted object header with no data chunks.
- * Can be discarded and the file deleted.
- */
- object->hdrChunk = 0;
- yaffs_FreeTnode(object->myDev,
- object->variant.
- fileVariant.top);
- object->variant.fileVariant.top = NULL;
- yaffs_DoGenericObjectDeletion(object);
-
- } else if (object) {
- /* It's either a data chunk in a live file or
- * an ObjectHeader, so we're interested in it.
- * NB Need to keep the ObjectHeaders of deleted files
- * until the whole file has been deleted off
- */
- tags.serialNumber++;
-
- dev->nGCCopies++;
-
- if (tags.chunkId == 0) {
- /* It is an object Id,
- * We need to nuke the shrinkheader flags first
- * We no longer want the shrinkHeader flag since its work is done
- * and if it is left in place it will mess up scanning.
- */
-
- yaffs_ObjectHeader *oh;
- oh = (yaffs_ObjectHeader *)buffer;
- oh->isShrink = 0;
- tags.extraIsShrinkHeader = 0;
-
- yaffs_VerifyObjectHeader(object, oh, &tags, 1);
- }
-
- newChunk =
- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
-
- if (newChunk < 0) {
- retVal = YAFFS_FAIL;
- } else {
-
- /* Ok, now fix up the Tnodes etc. */
-
- if (tags.chunkId == 0) {
- /* It's a header */
- object->hdrChunk = newChunk;
- object->serial = tags.serialNumber;
- } else {
- /* It's a data chunk */
- yaffs_PutChunkIntoFile
- (object,
- tags.chunkId,
- newChunk, 0);
- }
- }
- }
-
- if (retVal == YAFFS_OK)
- yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
-
- }
- }
-
- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
-
-
- /* Do any required cleanups */
- for (i = 0; i < cleanups; i++) {
- /* Time to delete the file too */
- object =
- yaffs_FindObjectByNumber(dev,
- dev->gcCleanupList[i]);
- if (object) {
- yaffs_FreeTnode(dev,
- object->variant.fileVariant.
- top);
- object->variant.fileVariant.top = NULL;
- T(YAFFS_TRACE_GC,
- (TSTR
- ("yaffs: About to finally delete object %d"
- TENDSTR), object->objectId));
- yaffs_DoGenericObjectDeletion(object);
- object->myDev->nDeletedFiles--;
- }
-
- }
-
- }
-
- yaffs_VerifyCollectedBlock(dev, bi, block);
+ if (chunkId > YAFFS_MAX_CHUNK_ID)
+ return NULL;
- chunksAfter = yaffs_GetErasedChunks(dev);
- if (chunksBefore >= chunksAfter) {
- T(YAFFS_TRACE_GC,
- (TSTR
- ("gc did not increase free chunks before %d after %d"
- TENDSTR), chunksBefore, chunksAfter));
- }
+ /* First check we're tall enough (ie enough topLevel) */
- /* If the gc completed then clear the current gcBlock so that we find another. */
- if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
- dev->gcBlock = -1;
- dev->gcChunk = 0;
+ x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
+ requiredTallness = 0;
+ while (x) {
+ x >>= YAFFS_TNODES_INTERNAL_BITS;
+ requiredTallness++;
}
- dev->isDoingGC = 0;
-
- return retVal;
-}
-/* New garbage collector
- * If we're very low on erased blocks then we do aggressive garbage collection
- * otherwise we do "leasurely" garbage collection.
- * Aggressive gc looks further (whole array) and will accept less dirty blocks.
- * Passive gc only inspects smaller areas and will only accept more dirty blocks.
- *
- * The idea is to help clear out space in a more spread-out manner.
- * Dunno if it really does anything useful.
- */
-static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
-{
- int block;
- int aggressive;
- int gcOk = YAFFS_OK;
- int maxTries = 0;
+ if (requiredTallness > fStruct->topLevel) {
+ /* Not tall enough, gotta make the tree taller */
+ for (i = fStruct->topLevel; i < requiredTallness; i++) {
- int checkpointBlockAdjust;
+ tn = yaffs_GetTnode(dev);
- if (dev->isDoingGC) {
- /* Bail out so we don't get recursive gc */
- return YAFFS_OK;
+ if (tn) {
+ tn->internal[0] = fStruct->top;
+ fStruct->top = tn;
+ fStruct->topLevel++;
+ } else {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("yaffs: no more tnodes" TENDSTR)));
+ return NULL;
+ }
+ }
}
- /* This loop should pass the first time.
- * We'll only see looping here if the erase of the collected block fails.
- */
-
- do {
- maxTries++;
-
- checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
- if (checkpointBlockAdjust < 0)
- checkpointBlockAdjust = 0;
+ /* Traverse down to level 0, adding anything we need */
- if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
- /* We need a block soon...*/
- aggressive = 1;
- } else {
- /* We're in no hurry */
- aggressive = 0;
- }
+ l = fStruct->topLevel;
+ tn = fStruct->top;
- if (dev->gcBlock <= 0) {
- dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
- dev->gcChunk = 0;
- }
+ if (l > 0) {
+ while (l > 0 && tn) {
+ x = (chunkId >>
+ (YAFFS_TNODES_LEVEL0_BITS +
+ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
+ YAFFS_TNODES_INTERNAL_MASK;
- block = dev->gcBlock;
- if (block > 0) {
- dev->garbageCollections++;
- if (!aggressive)
- dev->passiveGarbageCollections++;
+ if ((l > 1) && !tn->internal[x]) {
+ /* Add missing non-level-zero tnode */
+ tn->internal[x] = yaffs_GetTnode(dev);
+ if(!tn->internal[x])
+ return NULL;
+ } else if (l == 1) {
+ /* Looking from level 1 at level 0 */
+ if (passedTn) {
+ /* If we already have one, then release it.*/
+ if (tn->internal[x])
+ yaffs_FreeTnode(dev, tn->internal[x]);
+ tn->internal[x] = passedTn;
- T(YAFFS_TRACE_GC,
- (TSTR
- ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
- dev->nErasedBlocks, aggressive));
+ } else if (!tn->internal[x]) {
+ /* Don't have one, none passed in */
+ tn->internal[x] = yaffs_GetTnode(dev);
+ if(!tn->internal[x])
+ return NULL;
+ }
+ }
- gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
+ tn = tn->internal[x];
+ l--;
}
-
- if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) {
- T(YAFFS_TRACE_GC,
- (TSTR
- ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
- TENDSTR), dev->nErasedBlocks, maxTries, block));
+ } else {
+ /* top is level 0 */
+ if (passedTn) {
+ memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
+ yaffs_FreeTnode(dev, passedTn);
}
- } while ((dev->nErasedBlocks < dev->nReservedBlocks) &&
- (block > 0) &&
- (maxTries < 2));
+ }
- return aggressive ? gcOk : YAFFS_OK;
+ return tn;
}
-/*------------------------- TAGS --------------------------------*/
-
-static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
- int chunkInObject)
+static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
+ yaffs_ExtendedTags *tags, int objectId,
+ int chunkInInode)
{
- return (tags->chunkId == chunkInObject &&
- tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
+ int j;
+ for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
+ if (yaffs_CheckChunkBit(dev, theChunk / dev->param.nChunksPerBlock,
+ theChunk % dev->param.nChunksPerBlock)) {
+
+ if(dev->chunkGroupSize == 1)
+ return theChunk;
+ else {
+ yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
+ tags);
+ if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
+ /* found it; */
+ return theChunk;
+ }
+ }
+ }
+ theChunk++;
+ }
+ return -1;
}
+#if 0
+/* Experimental code not being used yet. Might speed up file deletion */
+/* DeleteWorker scans backwards through the tnode tree and deletes all the
+ * chunks and tnodes in the file.
+ * Returns 1 if the tree was deleted.
+ * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
+ */
-/*-------------------- Data file manipulation -----------------*/
-
-static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
- yaffs_ExtendedTags *tags)
+static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
+ int chunkOffset, int *limit)
{
- /*Get the Tnode, then get the level 0 offset chunk offset */
- yaffs_Tnode *tn;
- int theChunk = -1;
- yaffs_ExtendedTags localTags;
- int retVal = -1;
-
+ int i;
+ int chunkInInode;
+ int theChunk;
+ yaffs_ExtendedTags tags;
+ int foundChunk;
yaffs_Device *dev = in->myDev;
- if (!tags) {
- /* Passed a NULL, so use our own tags space */
- tags = &localTags;
- }
-
- tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
+ int allDone = 1;
if (tn) {
- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+ if (level > 0) {
+ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
+ i--) {
+ if (tn->internal[i]) {
+ if (limit && (*limit) < 0) {
+ allDone = 0;
+ } else {
+ allDone =
+ yaffs_DeleteWorker(in,
+ tn->
+ internal
+ [i],
+ level -
+ 1,
+ (chunkOffset
+ <<
+ YAFFS_TNODES_INTERNAL_BITS)
+ + i,
+ limit);
+ }
+ if (allDone) {
+ yaffs_FreeTnode(dev,
+ tn->
+ internal[i]);
+ tn->internal[i] = NULL;
+ }
+ }
+ }
+ return (allDone) ? 1 : 0;
+ } else if (level == 0) {
+ int hitLimit = 0;
- retVal =
- yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
- chunkInInode);
- }
- return retVal;
-}
+ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
+ i--) {
+ theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+ if (theChunk) {
-static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
- yaffs_ExtendedTags *tags)
-{
- /* Get the Tnode, then get the level 0 offset chunk offset */
- yaffs_Tnode *tn;
- int theChunk = -1;
- yaffs_ExtendedTags localTags;
+ chunkInInode = (chunkOffset <<
+ YAFFS_TNODES_LEVEL0_BITS) + i;
+
+ foundChunk =
+ yaffs_FindChunkInGroup(dev,
+ theChunk,
+ &tags,
+ in->objectId,
+ chunkInInode);
+
+ if (foundChunk > 0) {
+ yaffs_DeleteChunk(dev,
+ foundChunk, 1,
+ __LINE__);
+ in->nDataChunks--;
+ if (limit) {
+ *limit = *limit - 1;
+ if (*limit <= 0)
+ hitLimit = 1;
+ }
- yaffs_Device *dev = in->myDev;
- int retVal = -1;
+ }
+
+ yaffs_LoadLevel0Tnode(dev, tn, i, 0);
+ }
+
+ }
+ return (i < 0) ? 1 : 0;
+
+ }
- if (!tags) {
- /* Passed a NULL, so use our own tags space */
- tags = &localTags;
}
- tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
+ return 1;
- if (tn) {
+}
- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+#endif
- retVal =
- yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
- chunkInInode);
+static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
+{
+ yaffs_BlockInfo *theBlock;
+ unsigned blockNo;
- /* Delete the entry in the filestructure (if found) */
- if (retVal != -1)
- yaffs_PutLevel0Tnode(dev, tn, chunkInInode, 0);
- }
+ T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
- return retVal;
+ blockNo = chunk / dev->param.nChunksPerBlock;
+ theBlock = yaffs_GetBlockInfo(dev, blockNo);
+ if (theBlock) {
+ theBlock->softDeletions++;
+ dev->nFreeChunks++;
+ yaffs2_UpdateOldestDirtySequence(dev, blockNo, theBlock);
+ }
}
-#ifdef YAFFS_PARANOID
+/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
+ * All soft deleting does is increment the block's softdelete count and pulls the chunk out
+ * of the tnode.
+ * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
+ */
-static int yaffs_CheckFileSanity(yaffs_Object *in)
+static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
+ __u32 level, int chunkOffset)
{
- int chunk;
- int nChunks;
- int fSize;
- int failed = 0;
- int objId;
- yaffs_Tnode *tn;
- yaffs_Tags localTags;
- yaffs_Tags *tags = &localTags;
+ int i;
int theChunk;
- int chunkDeleted;
+ int allDone = 1;
+ yaffs_Device *dev = in->myDev;
- if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
- return YAFFS_FAIL;
+ if (tn) {
+ if (level > 0) {
- objId = in->objectId;
- fSize = in->variant.fileVariant.fileSize;
- nChunks =
- (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
-
- for (chunk = 1; chunk <= nChunks; chunk++) {
- tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
- chunk);
-
- if (tn) {
-
- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
-
- if (yaffs_CheckChunkBits
- (dev, theChunk / dev->nChunksPerBlock,
- theChunk % dev->nChunksPerBlock)) {
-
- yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
- tags,
- &chunkDeleted);
- if (yaffs_TagsMatch
- (tags, in->objectId, chunk, chunkDeleted)) {
- /* found it; */
+ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
+ i--) {
+ if (tn->internal[i]) {
+ allDone =
+ yaffs_SoftDeleteWorker(in,
+ tn->
+ internal[i],
+ level - 1,
+ (chunkOffset
+ <<
+ YAFFS_TNODES_INTERNAL_BITS)
+ + i);
+ if (allDone) {
+ yaffs_FreeTnode(dev,
+ tn->
+ internal[i]);
+ tn->internal[i] = NULL;
+ } else {
+ /* Hoosterman... how could this happen? */
+ }
+ }
+ }
+ return (allDone) ? 1 : 0;
+ } else if (level == 0) {
+ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
+ theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+ if (theChunk) {
+ /* Note this does not find the real chunk, only the chunk group.
+ * We make an assumption that a chunk group is not larger than
+ * a block.
+ */
+ yaffs_SoftDeleteChunk(dev, theChunk);
+ yaffs_LoadLevel0Tnode(dev, tn, i, 0);
}
- } else {
- failed = 1;
}
+ return 1;
- } else {
- /* T(("No level 0 found for %d\n", chunk)); */
}
+
}
- return failed ? YAFFS_FAIL : YAFFS_OK;
+ return 1;
+
}
-#endif
+static void yaffs_SoftDeleteFile(yaffs_Object *obj)
+{
+ if (obj->deleted &&
+ obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
+ if (obj->nDataChunks <= 0) {
+ /* Empty file with no duplicate object headers, just delete it immediately */
+ yaffs_FreeTnode(obj->myDev,
+ obj->variant.fileVariant.top);
+ obj->variant.fileVariant.top = NULL;
+ T(YAFFS_TRACE_TRACING,
+ (TSTR("yaffs: Deleting empty file %d" TENDSTR),
+ obj->objectId));
+ yaffs_DoGenericObjectDeletion(obj);
+ } else {
+ yaffs_SoftDeleteWorker(obj,
+ obj->variant.fileVariant.top,
+ obj->variant.fileVariant.
+ topLevel, 0);
+ obj->softDeleted = 1;
+ }
+ }
+}
-static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
- int chunkInNAND, int inScan)
+/* Pruning removes any part of the file structure tree that is beyond the
+ * bounds of the file (ie that does not point to chunks).
+ *
+ * A file should only get pruned when its size is reduced.
+ *
+ * Before pruning, the chunks must be pulled from the tree and the
+ * level 0 tnode entries must be zeroed out.
+ * Could also use this for file deletion, but that's probably better handled
+ * by a special case.
+ *
+ * This function is recursive. For levels > 0 the function is called again on
+ * any sub-tree. For level == 0 we just check if the sub-tree has data.
+ * If there is no data in a subtree then it is pruned.
+ */
+
+static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
+ __u32 level, int del0)
{
- /* NB inScan is zero unless scanning.
- * For forward scanning, inScan is > 0;
- * for backward scanning inScan is < 0
- */
+ int i;
+ int hasData;
- yaffs_Tnode *tn;
- yaffs_Device *dev = in->myDev;
- int existingChunk;
- yaffs_ExtendedTags existingTags;
- yaffs_ExtendedTags newTags;
- unsigned existingSerial, newSerial;
+ if (tn) {
+ hasData = 0;
- if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
- /* Just ignore an attempt at putting a chunk into a non-file during scanning
- * If it is not during Scanning then something went wrong!
- */
- if (!inScan) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy:attempt to put data chunk into a non-file"
- TENDSTR)));
- YBUG();
- }
+ if(level > 0){
+ for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
+ if (tn->internal[i]) {
+ tn->internal[i] =
+ yaffs_PruneWorker(dev, tn->internal[i],
+ level - 1,
+ (i == 0) ? del0 : 1);
+ }
- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
- return YAFFS_OK;
- }
+ if (tn->internal[i])
+ hasData++;
+ }
+ } else {
+ int tnodeSize_u32 = dev->tnodeSize/sizeof(__u32);
+ __u32 *map = (__u32 *)tn;
- tn = yaffs_AddOrFindLevel0Tnode(dev,
- &in->variant.fileVariant,
- chunkInInode,
- NULL);
- if (!tn)
- return YAFFS_FAIL;
+ for(i = 0; !hasData && i < tnodeSize_u32; i++){
+ if(map[i])
+ hasData++;
+ }
+ }
- existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+ if (hasData == 0 && del0) {
+ /* Free and return NULL */
- if (inScan != 0) {
- /* If we're scanning then we need to test for duplicates
- * NB This does not need to be efficient since it should only ever
- * happen when the power fails during a write, then only one
- * chunk should ever be affected.
- *
- * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
- * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
- */
+ yaffs_FreeTnode(dev, tn);
+ tn = NULL;
+ }
- if (existingChunk > 0) {
- /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
- * thus we have to do a FindChunkInFile to get the real chunk id.
- *
- * We have a duplicate now we need to decide which one to use:
- *
- * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
- * Forward scanning YAFFS2: The new one is what we use, dump the old one.
- * YAFFS1: Get both sets of tags and compare serial numbers.
- */
+ }
- if (inScan > 0) {
- /* Only do this for forward scanning */
- yaffs_ReadChunkWithTagsFromNAND(dev,
- chunkInNAND,
- NULL, &newTags);
+ return tn;
- /* Do a proper find */
- existingChunk =
- yaffs_FindChunkInFile(in, chunkInInode,
- &existingTags);
- }
+}
- if (existingChunk <= 0) {
- /*Hoosterman - how did this happen? */
+static int yaffs_PruneFileStructure(yaffs_Device *dev,
+ yaffs_FileStructure *fStruct)
+{
+ int i;
+ int hasData;
+ int done = 0;
+ yaffs_Tnode *tn;
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy: existing chunk < 0 in scan"
- TENDSTR)));
+ if (fStruct->topLevel > 0) {
+ fStruct->top =
+ yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
- }
+ /* Now we have a tree with all the non-zero branches NULL but the height
+ * is the same as it was.
+ * Let's see if we can trim internal tnodes to shorten the tree.
+ * We can do this if only the 0th element in the tnode is in use
+ * (ie all the non-zero are NULL)
+ */
- /* NB The deleted flags should be false, otherwise the chunks will
- * not be loaded during a scan
- */
+ while (fStruct->topLevel && !done) {
+ tn = fStruct->top;
- if (inScan > 0) {
- newSerial = newTags.serialNumber;
- existingSerial = existingTags.serialNumber;
+ hasData = 0;
+ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
+ if (tn->internal[i])
+ hasData++;
}
-
- if ((inScan > 0) &&
- (in->myDev->isYaffs2 ||
- existingChunk <= 0 ||
- ((existingSerial + 1) & 3) == newSerial)) {
- /* Forward scanning.
- * Use new
- * Delete the old one and drop through to update the tnode
- */
- yaffs_DeleteChunk(dev, existingChunk, 1,
- __LINE__);
- } else {
- /* Backward scanning or we want to use the existing one
- * Use existing.
- * Delete the new one and return early so that the tnode isn't changed
- */
- yaffs_DeleteChunk(dev, chunkInNAND, 1,
- __LINE__);
- return YAFFS_OK;
+
+ if (!hasData) {
+ fStruct->top = tn->internal[0];
+ fStruct->topLevel--;
+ yaffs_FreeTnode(dev, tn);
+ } else {
+ done = 1;
}
}
-
}
- if (existingChunk == 0)
- in->nDataChunks++;
-
- yaffs_PutLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
-
return YAFFS_OK;
}
-static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
- __u8 *buffer)
-{
- int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
-
- if (chunkInNAND >= 0)
- return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
- buffer, NULL);
- else {
- T(YAFFS_TRACE_NANDACCESS,
- (TSTR("Chunk %d not found zero instead" TENDSTR),
- chunkInNAND));
- /* get sane (zero) data if you read a hole */
- memset(buffer, 0, in->myDev->nDataBytesPerChunk);
- return 0;
- }
+/*-------------------- End of File Structure functions.-------------------*/
-}
-void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
+/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
+static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
{
- int block;
- int page;
- yaffs_ExtendedTags tags;
- yaffs_BlockInfo *bi;
+ yaffs_Object *obj = yaffs_AllocateRawObject(dev);
- if (chunkId <= 0)
- return;
+ if (obj) {
+ dev->nObjects++;
- dev->nDeletions++;
- block = chunkId / dev->nChunksPerBlock;
- page = chunkId % dev->nChunksPerBlock;
+ /* Now sweeten it up... */
+ memset(obj, 0, sizeof(yaffs_Object));
+ obj->beingCreated = 1;
- if (!yaffs_CheckChunkBit(dev, block, page))
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Deleting invalid chunk %d"TENDSTR),
- chunkId));
+ obj->myDev = dev;
+ obj->hdrChunk = 0;
+ obj->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
+ YINIT_LIST_HEAD(&(obj->hardLinks));
+ YINIT_LIST_HEAD(&(obj->hashLink));
+ YINIT_LIST_HEAD(&obj->siblings);
- bi = yaffs_GetBlockInfo(dev, block);
- T(YAFFS_TRACE_DELETION,
- (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
+ /* Now make the directory sane */
+ if (dev->rootDir) {
+ obj->parent = dev->rootDir;
+ ylist_add(&(obj->siblings), &dev->rootDir->variant.directoryVariant.children);
+ }
- if (markNAND &&
- bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
+ /* Add it to the lost and found directory.
+ * NB Can't put root or lostNFound in lostNFound so
+ * check if lostNFound exists first
+ */
+ if (dev->lostNFoundDir)
+ yaffs_AddObjectToDirectory(dev->lostNFoundDir, obj);
- yaffs_InitialiseTags(&tags);
+ obj->beingCreated = 0;
+ }
- tags.chunkDeleted = 1;
+ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
- yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
- yaffs_HandleUpdateChunk(dev, chunkId, &tags);
- } else {
- dev->nUnmarkedDeletions++;
- }
+ return obj;
+}
- /* Pull out of the management area.
- * If the whole block became dirty, this will kick off an erasure.
- */
- if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
- bi->blockState == YAFFS_BLOCK_STATE_FULL ||
- bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
- bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
- dev->nFreeChunks++;
+static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
+ __u32 mode)
+{
- yaffs_ClearChunkBit(dev, block, page);
+ yaffs_Object *obj =
+ yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
+ if (obj) {
+ obj->fake = 1; /* it is fake so it might have no NAND presence... */
+ obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
+ obj->unlinkAllowed = 0; /* ... or unlink it */
+ obj->deleted = 0;
+ obj->unlinked = 0;
+ obj->yst_mode = mode;
+ obj->myDev = dev;
+ obj->hdrChunk = 0; /* Not a valid chunk. */
+ }
- bi->pagesInUse--;
+ return obj;
- if (bi->pagesInUse == 0 &&
- !bi->hasShrinkHeader &&
- bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
- bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- yaffs_BlockBecameDirty(dev, block);
- }
+}
- }
+static void yaffs_UnhashObject(yaffs_Object *obj)
+{
+ int bucket;
+ yaffs_Device *dev = obj->myDev;
+ /* If it is still linked into the bucket list, free from the list */
+ if (!ylist_empty(&obj->hashLink)) {
+ ylist_del_init(&obj->hashLink);
+ bucket = yaffs_HashFunction(obj->objectId);
+ dev->objectBucket[bucket].count--;
+ }
}
-static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
- const __u8 *buffer, int nBytes,
- int useReserve)
+/* FreeObject frees up a Object and puts it back on the free list */
+static void yaffs_FreeObject(yaffs_Object *obj)
{
- /* Find old chunk Need to do this to get serial number
- * Write new one and patch into tree.
- * Invalidate old tags.
- */
+ yaffs_Device *dev = obj->myDev;
- int prevChunkId;
- yaffs_ExtendedTags prevTags;
+ T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), obj, obj->myInode));
- int newChunkId;
- yaffs_ExtendedTags newTags;
+ if (!obj)
+ YBUG();
+ if (obj->parent)
+ YBUG();
+ if (!ylist_empty(&obj->siblings))
+ YBUG();
- yaffs_Device *dev = in->myDev;
- yaffs_CheckGarbageCollection(dev);
+ if (obj->myInode) {
+ /* We're still hooked up to a cached inode.
+ * Don't delete now, but mark for later deletion
+ */
+ obj->deferedFree = 1;
+ return;
+ }
+
+ yaffs_UnhashObject(obj);
- /* Get the previous chunk at this location in the file if it exists */
- prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
+ yaffs_FreeRawObject(dev,obj);
+ dev->nObjects--;
+ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+}
- /* Set up new tags */
- yaffs_InitialiseTags(&newTags);
- newTags.chunkId = chunkInInode;
- newTags.objectId = in->objectId;
- newTags.serialNumber =
- (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1;
- newTags.byteCount = nBytes;
+void yaffs_HandleDeferedFree(yaffs_Object *obj)
+{
+ if (obj->deferedFree)
+ yaffs_FreeObject(obj);
+}
- if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
- YBUG();
+static void yaffs_InitialiseTnodesAndObjects(yaffs_Device *dev)
+{
+ int i;
+
+ dev->nObjects = 0;
+ dev->nTnodes = 0;
+
+ yaffs_InitialiseRawTnodesAndObjects(dev);
+
+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+ YINIT_LIST_HEAD(&dev->objectBucket[i].list);
+ dev->objectBucket[i].count = 0;
}
+}
- newChunkId =
- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
- useReserve);
+static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
+{
+ int i;
+ int l = 999;
+ int lowest = 999999;
- if (newChunkId >= 0) {
- yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
- if (prevChunkId >= 0)
- yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
+ /* Search for the shortest list or one that
+ * isn't too long.
+ */
+
+ for (i = 0; i < 10 && lowest > 4; i++) {
+ dev->bucketFinder++;
+ dev->bucketFinder %= YAFFS_NOBJECT_BUCKETS;
+ if (dev->objectBucket[dev->bucketFinder].count < lowest) {
+ lowest = dev->objectBucket[dev->bucketFinder].count;
+ l = dev->bucketFinder;
+ }
- yaffs_CheckFileSanity(in);
}
- return newChunkId;
+ return l;
}
-/* UpdateObjectHeader updates the header on NAND for an object.
- * If name is not NULL, then that new name is used.
- */
-int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
- int isShrink, int shadows)
+static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
{
+ int bucket = yaffs_FindNiceObjectBucket(dev);
- yaffs_BlockInfo *bi;
+ /* Now find an object value that has not already been taken
+ * by scanning the list.
+ */
- yaffs_Device *dev = in->myDev;
+ int found = 0;
+ struct ylist_head *i;
- int prevChunkId;
- int retVal = 0;
- int result = 0;
+ __u32 n = (__u32) bucket;
- int newChunkId;
- yaffs_ExtendedTags newTags;
- yaffs_ExtendedTags oldTags;
+ /* yaffs_CheckObjectHashSanity(); */
- __u8 *buffer = NULL;
- YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
+ while (!found) {
+ found = 1;
+ n += YAFFS_NOBJECT_BUCKETS;
+ if (1 || dev->objectBucket[bucket].count > 0) {
+ ylist_for_each(i, &dev->objectBucket[bucket].list) {
+ /* If there is already one in the list */
+ if (i && ylist_entry(i, yaffs_Object,
+ hashLink)->objectId == n) {
+ found = 0;
+ }
+ }
+ }
+ }
- yaffs_ObjectHeader *oh = NULL;
+ return n;
+}
- yaffs_strcpy(oldName, _Y("silly old name"));
+static void yaffs_HashObject(yaffs_Object *in)
+{
+ int bucket = yaffs_HashFunction(in->objectId);
+ yaffs_Device *dev = in->myDev;
+ ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
+ dev->objectBucket[bucket].count++;
+}
- if (!in->fake ||
- in == dev->rootDir || /* The rootDir should also be saved */
- force) {
+yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
+{
+ int bucket = yaffs_HashFunction(number);
+ struct ylist_head *i;
+ yaffs_Object *in;
- yaffs_CheckGarbageCollection(dev);
- yaffs_CheckObjectDetailsLoaded(in);
+ ylist_for_each(i, &dev->objectBucket[bucket].list) {
+ /* Look if it is in the list */
+ if (i) {
+ in = ylist_entry(i, yaffs_Object, hashLink);
+ if (in->objectId == number) {
- buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
- oh = (yaffs_ObjectHeader *) buffer;
+ /* Don't tell the VFS about this one if it is defered free */
+ if (in->deferedFree)
+ return NULL;
- prevChunkId = in->hdrChunk;
+ return in;
+ }
+ }
+ }
- if (prevChunkId > 0) {
- result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
- buffer, &oldTags);
+ return NULL;
+}
- yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
+yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
+ yaffs_ObjectType type)
+{
+ yaffs_Object *theObject=NULL;
+ yaffs_Tnode *tn = NULL;
+
+ if (number < 0)
+ number = yaffs_CreateNewObjectNumber(dev);
- memcpy(oldName, oh->name, sizeof(oh->name));
- }
+ if (type == YAFFS_OBJECT_TYPE_FILE) {
+ tn = yaffs_GetTnode(dev);
+ if (!tn)
+ return NULL;
+ }
- memset(buffer, 0xFF, dev->nDataBytesPerChunk);
+ theObject = yaffs_AllocateEmptyObject(dev);
+ if (!theObject){
+ if(tn)
+ yaffs_FreeTnode(dev,tn);
+ return NULL;
+ }
- oh->type = in->variantType;
- oh->yst_mode = in->yst_mode;
- oh->shadowsObject = oh->inbandShadowsObject = shadows;
+ if (theObject) {
+ theObject->fake = 0;
+ theObject->renameAllowed = 1;
+ theObject->unlinkAllowed = 1;
+ theObject->objectId = number;
+ yaffs_HashObject(theObject);
+ theObject->variantType = type;
#ifdef CONFIG_YAFFS_WINCE
- oh->win_atime[0] = in->win_atime[0];
- oh->win_ctime[0] = in->win_ctime[0];
- oh->win_mtime[0] = in->win_mtime[0];
- oh->win_atime[1] = in->win_atime[1];
- oh->win_ctime[1] = in->win_ctime[1];
- oh->win_mtime[1] = in->win_mtime[1];
-#else
- oh->yst_uid = in->yst_uid;
- oh->yst_gid = in->yst_gid;
- oh->yst_atime = in->yst_atime;
- oh->yst_mtime = in->yst_mtime;
- oh->yst_ctime = in->yst_ctime;
- oh->yst_rdev = in->yst_rdev;
-#endif
- if (in->parent)
- oh->parentObjectId = in->parent->objectId;
- else
- oh->parentObjectId = 0;
-
- if (name && *name) {
- memset(oh->name, 0, sizeof(oh->name));
- yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
- } else if (prevChunkId >= 0)
- memcpy(oh->name, oldName, sizeof(oh->name));
- else
- memset(oh->name, 0, sizeof(oh->name));
+ yfsd_WinFileTimeNow(theObject->win_atime);
+ theObject->win_ctime[0] = theObject->win_mtime[0] =
+ theObject->win_atime[0];
+ theObject->win_ctime[1] = theObject->win_mtime[1] =
+ theObject->win_atime[1];
- oh->isShrink = isShrink;
+#else
- switch (in->variantType) {
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* Should not happen */
- break;
+ theObject->yst_atime = theObject->yst_mtime =
+ theObject->yst_ctime = Y_CURRENT_TIME;
+#endif
+ switch (type) {
case YAFFS_OBJECT_TYPE_FILE:
- oh->fileSize =
- (oh->parentObjectId == YAFFS_OBJECTID_DELETED
- || oh->parentObjectId ==
- YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
- fileVariant.fileSize;
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- oh->equivalentObjectId =
- in->variant.hardLinkVariant.equivalentObjectId;
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* Do nothing */
+ theObject->variant.fileVariant.fileSize = 0;
+ theObject->variant.fileVariant.scannedFileSize = 0;
+ theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
+ theObject->variant.fileVariant.topLevel = 0;
+ theObject->variant.fileVariant.top = tn;
break;
case YAFFS_OBJECT_TYPE_DIRECTORY:
- /* Do nothing */
+ YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
+ children);
+ YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
+ dirty);
break;
case YAFFS_OBJECT_TYPE_SYMLINK:
- yaffs_strncpy(oh->alias,
- in->variant.symLinkVariant.alias,
- YAFFS_MAX_ALIAS_LENGTH);
- oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ /* No action required */
+ break;
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ /* todo this should not happen */
break;
}
+ }
- /* Tags */
- yaffs_InitialiseTags(&newTags);
- in->serial++;
- newTags.chunkId = 0;
- newTags.objectId = in->objectId;
- newTags.serialNumber = in->serial;
-
- /* Add extra info for file header */
-
- newTags.extraHeaderInfoAvailable = 1;
- newTags.extraParentObjectId = oh->parentObjectId;
- newTags.extraFileLength = oh->fileSize;
- newTags.extraIsShrinkHeader = oh->isShrink;
- newTags.extraEquivalentObjectId = oh->equivalentObjectId;
- newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
- newTags.extraObjectType = in->variantType;
-
- yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
+ return theObject;
+}
- /* Create new chunk in NAND */
- newChunkId =
- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
- (prevChunkId >= 0) ? 1 : 0);
+yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
+ int number,
+ yaffs_ObjectType type)
+{
+ yaffs_Object *theObject = NULL;
- if (newChunkId >= 0) {
+ if (number > 0)
+ theObject = yaffs_FindObjectByNumber(dev, number);
- in->hdrChunk = newChunkId;
+ if (!theObject)
+ theObject = yaffs_CreateNewObject(dev, number, type);
- if (prevChunkId >= 0) {
- yaffs_DeleteChunk(dev, prevChunkId, 1,
- __LINE__);
- }
+ return theObject;
- if (!yaffs_ObjectHasCachedWriteData(in))
- in->dirty = 0;
+}
- /* If this was a shrink, then mark the block that the chunk lives on */
- if (isShrink) {
- bi = yaffs_GetBlockInfo(in->myDev,
- newChunkId / in->myDev->nChunksPerBlock);
- bi->hasShrinkHeader = 1;
- }
- }
+YCHAR *yaffs_CloneString(const YCHAR *str)
+{
+ YCHAR *newStr = NULL;
+ int len;
- retVal = newChunkId;
+ if (!str)
+ str = _Y("");
+ len = yaffs_strnlen(str,YAFFS_MAX_ALIAS_LENGTH);
+ newStr = YMALLOC((len + 1) * sizeof(YCHAR));
+ if (newStr){
+ yaffs_strncpy(newStr, str,len);
+ newStr[len] = 0;
}
+ return newStr;
- if (buffer)
- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
-
- return retVal;
}
-/*------------------------ Short Operations Cache ----------------------------------------
- * In many situations where there is no high level buffering (eg WinCE) a lot of
- * reads might be short sequential reads, and a lot of writes may be short
- * sequential writes. eg. scanning/writing a jpeg file.
- * In these cases, a short read/write cache can provide a huge perfomance benefit
- * with dumb-as-a-rock code.
- * In Linux, the page cache provides read buffering aand the short op cache provides write
- * buffering.
- *
- * There are a limited number (~10) of cache chunks per device so that we don't
- * need a very intelligent search.
+/*
+ * Mknod (create) a new object.
+ * equivalentObject only has meaning for a hard link;
+ * aliasString only has meaning for a symlink.
+ * rdev only has meaning for devices (a subset of special objects)
*/
-static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
+static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
+ yaffs_Object *parent,
+ const YCHAR *name,
+ __u32 mode,
+ __u32 uid,
+ __u32 gid,
+ yaffs_Object *equivalentObject,
+ const YCHAR *aliasString, __u32 rdev)
{
- yaffs_Device *dev = obj->myDev;
- int i;
- yaffs_ChunkCache *cache;
- int nCaches = obj->myDev->nShortOpCaches;
+ yaffs_Object *in;
+ YCHAR *str = NULL;
- for (i = 0; i < nCaches; i++) {
- cache = &dev->srCache[i];
- if (cache->object == obj &&
- cache->dirty)
- return 1;
+ yaffs_Device *dev = parent->myDev;
+
+ /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
+ if (yaffs_FindObjectByName(parent, name))
+ return NULL;
+
+ if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
+ str = yaffs_CloneString(aliasString);
+ if (!str)
+ return NULL;
}
- return 0;
-}
+ in = yaffs_CreateNewObject(dev, -1, type);
+ if (!in){
+ if(str)
+ YFREE(str);
+ return NULL;
+ }
-static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
-{
- yaffs_Device *dev = obj->myDev;
- int lowest = -99; /* Stop compiler whining. */
- int i;
- yaffs_ChunkCache *cache;
- int chunkWritten = 0;
- int nCaches = obj->myDev->nShortOpCaches;
- if (nCaches > 0) {
- do {
- cache = NULL;
- /* Find the dirty cache for this object with the lowest chunk id. */
- for (i = 0; i < nCaches; i++) {
- if (dev->srCache[i].object == obj &&
- dev->srCache[i].dirty) {
- if (!cache
- || dev->srCache[i].chunkId <
- lowest) {
- cache = &dev->srCache[i];
- lowest = cache->chunkId;
- }
- }
- }
- if (cache && !cache->locked) {
- /* Write it out and free it up */
- chunkWritten =
- yaffs_WriteChunkDataToObject(cache->object,
- cache->chunkId,
- cache->data,
- cache->nBytes,
- 1);
- cache->dirty = 0;
- cache->object = NULL;
- }
+ if (in) {
+ in->hdrChunk = 0;
+ in->valid = 1;
+ in->variantType = type;
- } while (cache && chunkWritten > 0);
+ in->yst_mode = mode;
- if (cache) {
- /* Hoosterman, disk full while writing cache out. */
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_WinFileTimeNow(in->win_atime);
+ in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
+ in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
+
+#else
+ in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
+
+ in->yst_rdev = rdev;
+ in->yst_uid = uid;
+ in->yst_gid = gid;
+#endif
+ in->nDataChunks = 0;
+
+ yaffs_SetObjectName(in, name);
+ in->dirty = 1;
+
+ yaffs_AddObjectToDirectory(parent, in);
+
+ in->myDev = parent->myDev;
+
+ switch (type) {
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ in->variant.symLinkVariant.alias = str;
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ in->variant.hardLinkVariant.equivalentObject =
+ equivalentObject;
+ in->variant.hardLinkVariant.equivalentObjectId =
+ equivalentObject->objectId;
+ ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
+ break;
+ case YAFFS_OBJECT_TYPE_FILE:
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ /* do nothing */
+ break;
+ }
+ if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0, NULL) < 0) {
+ /* Could not create the object header, fail the creation */
+ yaffs_DeleteObject(in);
+ in = NULL;
}
+
+ yaffs_UpdateParent(parent);
}
+ return in;
}
-/*yaffs_FlushEntireDeviceCache(dev)
- *
- *
- */
-
-void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
+yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
+ __u32 mode, __u32 uid, __u32 gid)
{
- yaffs_Object *obj;
- int nCaches = dev->nShortOpCaches;
- int i;
-
- /* Find a dirty object in the cache and flush it...
- * until there are no further dirty objects.
- */
- do {
- obj = NULL;
- for (i = 0; i < nCaches && !obj; i++) {
- if (dev->srCache[i].object &&
- dev->srCache[i].dirty)
- obj = dev->srCache[i].object;
-
- }
- if (obj)
- yaffs_FlushFilesChunkCache(obj);
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
+ uid, gid, NULL, NULL, 0);
+}
- } while (obj);
+yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
+ __u32 mode, __u32 uid, __u32 gid)
+{
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
+ mode, uid, gid, NULL, NULL, 0);
+}
+yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
+ __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
+{
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
+ uid, gid, NULL, NULL, rdev);
}
+yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
+ __u32 mode, __u32 uid, __u32 gid,
+ const YCHAR *alias)
+{
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
+ uid, gid, NULL, alias, 0);
+}
-/* Grab us a cache chunk for use.
- * First look for an empty one.
- * Then look for the least recently used non-dirty one.
- * Then look for the least recently used dirty one...., flush and look again.
- */
-static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
+/* yaffs_Link returns the object id of the equivalent object.*/
+yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
+ yaffs_Object *equivalentObject)
{
- int i;
+ /* Get the real object in case we were fed a hard link as an equivalent object */
+ equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
- if (dev->nShortOpCaches > 0) {
- for (i = 0; i < dev->nShortOpCaches; i++) {
- if (!dev->srCache[i].object)
- return &dev->srCache[i];
- }
+ if (yaffs_MknodObject
+ (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
+ equivalentObject, NULL, 0)) {
+ return equivalentObject;
+ } else {
+ return NULL;
}
- return NULL;
}
-static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
+static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
+ const YCHAR *newName, int force, int shadows)
{
- yaffs_ChunkCache *cache;
- yaffs_Object *theObj;
- int usage;
- int i;
- int pushout;
-
- if (dev->nShortOpCaches > 0) {
- /* Try find a non-dirty one... */
+ int unlinkOp;
+ int deleteOp;
- cache = yaffs_GrabChunkCacheWorker(dev);
+ yaffs_Object *existingTarget;
- if (!cache) {
- /* They were all dirty, find the last recently used object and flush
- * its cache, then find again.
- * NB what's here is not very accurate, we actually flush the object
- * the last recently used page.
- */
+ if (newDir == NULL)
+ newDir = obj->parent; /* use the old directory */
- /* With locking we can't assume we can use entry zero */
+ if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+ ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
+ TENDSTR)));
+ YBUG();
+ }
- theObj = NULL;
- usage = -1;
- cache = NULL;
- pushout = -1;
+ /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
+ if (obj->myDev->param.isYaffs2)
+ unlinkOp = (newDir == obj->myDev->unlinkedDir);
+ else
+ unlinkOp = (newDir == obj->myDev->unlinkedDir
+ && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
- for (i = 0; i < dev->nShortOpCaches; i++) {
- if (dev->srCache[i].object &&
- !dev->srCache[i].locked &&
- (dev->srCache[i].lastUse < usage || !cache)) {
- usage = dev->srCache[i].lastUse;
- theObj = dev->srCache[i].object;
- cache = &dev->srCache[i];
- pushout = i;
- }
- }
+ deleteOp = (newDir == obj->myDev->deletedDir);
- if (!cache || cache->dirty) {
- /* Flush and try again */
- yaffs_FlushFilesChunkCache(theObj);
- cache = yaffs_GrabChunkCacheWorker(dev);
- }
+ existingTarget = yaffs_FindObjectByName(newDir, newName);
- }
- return cache;
- } else
- return NULL;
+ /* If the object is a file going into the unlinked directory,
+ * then it is OK to just stuff it in since duplicate names are allowed.
+ * else only proceed if the new name does not exist and if we're putting
+ * it into a directory.
+ */
+ if ((unlinkOp ||
+ deleteOp ||
+ force ||
+ (shadows > 0) ||
+ !existingTarget) &&
+ newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
+ yaffs_SetObjectName(obj, newName);
+ obj->dirty = 1;
-}
+ yaffs_AddObjectToDirectory(newDir, obj);
-/* Find a cached chunk */
-static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
- int chunkId)
-{
- yaffs_Device *dev = obj->myDev;
- int i;
- if (dev->nShortOpCaches > 0) {
- for (i = 0; i < dev->nShortOpCaches; i++) {
- if (dev->srCache[i].object == obj &&
- dev->srCache[i].chunkId == chunkId) {
- dev->cacheHits++;
+ if (unlinkOp)
+ obj->unlinked = 1;
- return &dev->srCache[i];
- }
- }
+ /* If it is a deletion then we mark it as a shrink for gc purposes. */
+ if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows, NULL) >= 0)
+ return YAFFS_OK;
}
- return NULL;
+
+ return YAFFS_FAIL;
}
-/* Mark the chunk for the least recently used algorithym */
-static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
- int isAWrite)
+int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
+ yaffs_Object *newDir, const YCHAR *newName)
{
+ yaffs_Object *obj = NULL;
+ yaffs_Object *existingTarget = NULL;
+ int force = 0;
+ int result;
+ yaffs_Device *dev;
- if (dev->nShortOpCaches > 0) {
- if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
- /* Reset the cache usages */
- int i;
- for (i = 1; i < dev->nShortOpCaches; i++)
- dev->srCache[i].lastUse = 0;
- dev->srLastUse = 0;
- }
+ if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
+ if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
- dev->srLastUse++;
+ dev = oldDir->myDev;
- cache->lastUse = dev->srLastUse;
+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
+ /* Special case for case insemsitive systems (eg. WinCE).
+ * While look-up is case insensitive, the name isn't.
+ * Therefore we might want to change x.txt to X.txt
+ */
+ if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
+ force = 1;
+#endif
- if (isAWrite)
- cache->dirty = 1;
- }
-}
+ if(yaffs_strnlen(newName,YAFFS_MAX_NAME_LENGTH+1) > YAFFS_MAX_NAME_LENGTH)
+ /* ENAMETOOLONG */
+ return YAFFS_FAIL;
-/* Invalidate a single cache page.
- * Do this when a whole page gets written,
- * ie the short cache for this page is no longer valid.
- */
-static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
-{
- if (object->myDev->nShortOpCaches > 0) {
- yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
+ obj = yaffs_FindObjectByName(oldDir, oldName);
- if (cache)
- cache->object = NULL;
- }
-}
+ if (obj && obj->renameAllowed) {
-/* Invalidate all the cache pages associated with this object
- * Do this whenever ther file is deleted or resized.
- */
-static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
-{
- int i;
- yaffs_Device *dev = in->myDev;
+ /* Now do the handling for an existing target, if there is one */
- if (dev->nShortOpCaches > 0) {
- /* Invalidate it. */
- for (i = 0; i < dev->nShortOpCaches; i++) {
- if (dev->srCache[i].object == in)
- dev->srCache[i].object = NULL;
+ existingTarget = yaffs_FindObjectByName(newDir, newName);
+ if (existingTarget &&
+ existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+ !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
+ /* There is a target that is a non-empty directory, so we fail */
+ return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
+ } else if (existingTarget && existingTarget != obj) {
+ /* Nuke the target first, using shadowing,
+ * but only if it isn't the same object.
+ *
+ * Note we must disable gc otherwise it can mess up the shadowing.
+ *
+ */
+ dev->gcDisable=1;
+ yaffs_ChangeObjectName(obj, newDir, newName, force,
+ existingTarget->objectId);
+ existingTarget->isShadowed = 1;
+ yaffs_UnlinkObject(existingTarget);
+ dev->gcDisable=0;
}
+
+ result = yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
+
+ yaffs_UpdateParent(oldDir);
+ if(newDir != oldDir)
+ yaffs_UpdateParent(newDir);
+
+ return result;
}
+ return YAFFS_FAIL;
}
-/*--------------------- Checkpointing --------------------*/
-
+/*------------------------- Block Management and Page Allocation ----------------*/
-static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
+static int yaffs_InitialiseBlocks(yaffs_Device *dev)
{
- yaffs_CheckpointValidity cp;
+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
- memset(&cp, 0, sizeof(cp));
+ dev->blockInfo = NULL;
+ dev->chunkBits = NULL;
- cp.structType = sizeof(cp);
- cp.magic = YAFFS_MAGIC;
- cp.version = YAFFS_CHECKPOINT_VERSION;
- cp.head = (head) ? 1 : 0;
+ dev->allocationBlock = -1; /* force it to get a new one */
- return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
- 1 : 0;
-}
+ /* If the first allocation strategy fails, thry the alternate one */
+ dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
+ if (!dev->blockInfo) {
+ dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
+ dev->blockInfoAlt = 1;
+ } else
+ dev->blockInfoAlt = 0;
-static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
-{
- yaffs_CheckpointValidity cp;
- int ok;
+ if (dev->blockInfo) {
+ /* Set up dynamic blockinfo stuff. */
+ dev->chunkBitmapStride = (dev->param.nChunksPerBlock + 7) / 8; /* round up bytes */
+ dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
+ if (!dev->chunkBits) {
+ dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
+ dev->chunkBitsAlt = 1;
+ } else
+ dev->chunkBitsAlt = 0;
+ }
- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+ if (dev->blockInfo && dev->chunkBits) {
+ memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
+ memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
+ return YAFFS_OK;
+ }
- if (ok)
- ok = (cp.structType == sizeof(cp)) &&
- (cp.magic == YAFFS_MAGIC) &&
- (cp.version == YAFFS_CHECKPOINT_VERSION) &&
- (cp.head == ((head) ? 1 : 0));
- return ok ? 1 : 0;
+ return YAFFS_FAIL;
}
-static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
- yaffs_Device *dev)
+static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
{
- cp->nErasedBlocks = dev->nErasedBlocks;
- cp->allocationBlock = dev->allocationBlock;
- cp->allocationPage = dev->allocationPage;
- cp->nFreeChunks = dev->nFreeChunks;
+ if (dev->blockInfoAlt && dev->blockInfo)
+ YFREE_ALT(dev->blockInfo);
+ else if (dev->blockInfo)
+ YFREE(dev->blockInfo);
+
+ dev->blockInfoAlt = 0;
- cp->nDeletedFiles = dev->nDeletedFiles;
- cp->nUnlinkedFiles = dev->nUnlinkedFiles;
- cp->nBackgroundDeletions = dev->nBackgroundDeletions;
- cp->sequenceNumber = dev->sequenceNumber;
- cp->oldestDirtySequence = dev->oldestDirtySequence;
+ dev->blockInfo = NULL;
+ if (dev->chunkBitsAlt && dev->chunkBits)
+ YFREE_ALT(dev->chunkBits);
+ else if (dev->chunkBits)
+ YFREE(dev->chunkBits);
+ dev->chunkBitsAlt = 0;
+ dev->chunkBits = NULL;
}
-static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev,
- yaffs_CheckpointDevice *cp)
+void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
{
- dev->nErasedBlocks = cp->nErasedBlocks;
- dev->allocationBlock = cp->allocationBlock;
- dev->allocationPage = cp->allocationPage;
- dev->nFreeChunks = cp->nFreeChunks;
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
- dev->nDeletedFiles = cp->nDeletedFiles;
- dev->nUnlinkedFiles = cp->nUnlinkedFiles;
- dev->nBackgroundDeletions = cp->nBackgroundDeletions;
- dev->sequenceNumber = cp->sequenceNumber;
- dev->oldestDirtySequence = cp->oldestDirtySequence;
-}
+ int erasedOk = 0;
+ /* If the block is still healthy erase it and mark as clean.
+ * If the block has had a data failure, then retire it.
+ */
-static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
-{
- yaffs_CheckpointDevice cp;
- __u32 nBytes;
- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
+ T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
+ (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
+ blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
- int ok;
+ yaffs2_ClearOldestDirtySequence(dev,bi);
- /* Write device runtime values*/
- yaffs_DeviceToCheckpointDevice(&cp, dev);
- cp.structType = sizeof(cp);
+ bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+ /* If this is the block being garbage collected then stop gc'ing this block */
+ if(blockNo == dev->gcBlock)
+ dev->gcBlock = 0;
+
+ /* If this block is currently the best candidate for gc then drop as a candidate */
+ if(blockNo == dev->gcDirtiest){
+ dev->gcDirtiest = 0;
+ dev->gcPagesInUse = 0;
+ }
- /* Write block info */
- if (ok) {
- nBytes = nBlocks * sizeof(yaffs_BlockInfo);
- ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
+ if (!bi->needsRetiring) {
+ yaffs2_InvalidateCheckpoint(dev);
+ erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
+ if (!erasedOk) {
+ dev->nErasureFailures++;
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
+ }
}
- /* Write chunk bits */
- if (ok) {
- nBytes = nBlocks * dev->chunkBitmapStride;
- ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
+ if (erasedOk &&
+ ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
+ int i;
+ for (i = 0; i < dev->param.nChunksPerBlock; i++) {
+ if (!yaffs_CheckChunkErased
+ (dev, blockNo * dev->param.nChunksPerBlock + i)) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ (">>Block %d erasure supposedly OK, but chunk %d not erased"
+ TENDSTR), blockNo, i));
+ }
+ }
}
- return ok ? 1 : 0;
+ if (erasedOk) {
+ /* Clean it up... */
+ bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
+ bi->sequenceNumber = 0;
+ dev->nErasedBlocks++;
+ bi->pagesInUse = 0;
+ bi->softDeletions = 0;
+ bi->hasShrinkHeader = 0;
+ bi->skipErasedCheck = 1; /* This is clean, so no need to check */
+ bi->gcPrioritise = 0;
+ yaffs_ClearChunkBits(dev, blockNo);
+
+ T(YAFFS_TRACE_ERASE,
+ (TSTR("Erased block %d" TENDSTR), blockNo));
+ } else {
+ dev->nFreeChunks -= dev->param.nChunksPerBlock; /* We lost a block of free space */
+
+ yaffs_RetireBlock(dev, blockNo);
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("**>> Block %d retired" TENDSTR), blockNo));
+ }
}
-static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
+static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
{
- yaffs_CheckpointDevice cp;
- __u32 nBytes;
- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
-
- int ok;
+ int i;
- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
- if (!ok)
- return 0;
+ yaffs_BlockInfo *bi;
- if (cp.structType != sizeof(cp))
- return 0;
+ if (dev->nErasedBlocks < 1) {
+ /* Hoosterman we've got a problem.
+ * Can't get space to gc
+ */
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
+ return -1;
+ }
- yaffs_CheckpointDeviceToDevice(dev, &cp);
+ /* Find an empty block. */
- nBytes = nBlocks * sizeof(yaffs_BlockInfo);
+ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+ dev->allocationBlockFinder++;
+ if (dev->allocationBlockFinder < dev->internalStartBlock
+ || dev->allocationBlockFinder > dev->internalEndBlock) {
+ dev->allocationBlockFinder = dev->internalStartBlock;
+ }
- ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
+ bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
- if (!ok)
- return 0;
- nBytes = nBlocks * dev->chunkBitmapStride;
+ if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
+ bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
+ dev->sequenceNumber++;
+ bi->sequenceNumber = dev->sequenceNumber;
+ dev->nErasedBlocks--;
+ T(YAFFS_TRACE_ALLOCATE,
+ (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
+ dev->allocationBlockFinder, dev->sequenceNumber,
+ dev->nErasedBlocks));
+ return dev->allocationBlockFinder;
+ }
+ }
- ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+ ("yaffs tragedy: no more erased blocks, but there should have been %d"
+ TENDSTR), dev->nErasedBlocks));
- return ok ? 1 : 0;
+ return -1;
}
-static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
- yaffs_Object *obj)
+
+/*
+ * Check if there's space to allocate...
+ * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
+ */
+int yaffs_CheckSpaceForAllocation(yaffs_Device *dev, int nChunks)
{
+ int reservedChunks;
+ int reservedBlocks = dev->param.nReservedBlocks;
+ int checkpointBlocks;
- cp->objectId = obj->objectId;
- cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
- cp->hdrChunk = obj->hdrChunk;
- cp->variantType = obj->variantType;
- cp->deleted = obj->deleted;
- cp->softDeleted = obj->softDeleted;
- cp->unlinked = obj->unlinked;
- cp->fake = obj->fake;
- cp->renameAllowed = obj->renameAllowed;
- cp->unlinkAllowed = obj->unlinkAllowed;
- cp->serial = obj->serial;
- cp->nDataChunks = obj->nDataChunks;
+ checkpointBlocks = yaffs2_CalcCheckpointBlocksRequired(dev);
- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
- cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
- else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
- cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
+ reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->param.nChunksPerBlock);
+
+ return (dev->nFreeChunks > (reservedChunks + nChunks));
}
-static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
+static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
+ yaffs_BlockInfo **blockUsedPtr)
{
+ int retVal;
+ yaffs_BlockInfo *bi;
- yaffs_Object *parent;
+ if (dev->allocationBlock < 0) {
+ /* Get next block to allocate off */
+ dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
+ dev->allocationPage = 0;
+ }
- if (obj->variantType != cp->variantType) {
- T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
- TCONT("chunk %d does not match existing object type %d")
- TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
- obj->variantType));
- return 0;
+ if (!useReserve && !yaffs_CheckSpaceForAllocation(dev, 1)) {
+ /* Not enough space to allocate unless we're allowed to use the reserve. */
+ return -1;
}
- obj->objectId = cp->objectId;
+ if (dev->nErasedBlocks < dev->param.nReservedBlocks
+ && dev->allocationPage == 0) {
+ T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
+ }
- if (cp->parentId)
- parent = yaffs_FindOrCreateObjectByNumber(
- obj->myDev,
- cp->parentId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
- else
- parent = NULL;
+ /* Next page please.... */
+ if (dev->allocationBlock >= 0) {
+ bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
- if (parent) {
- if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
- TCONT(" chunk %d Parent type, %d, not directory")
- TENDSTR),
- cp->objectId, cp->parentId, cp->variantType,
- cp->hdrChunk, parent->variantType));
- return 0;
- }
- yaffs_AddObjectToDirectory(parent, obj);
- }
+ retVal = (dev->allocationBlock * dev->param.nChunksPerBlock) +
+ dev->allocationPage;
+ bi->pagesInUse++;
+ yaffs_SetChunkBit(dev, dev->allocationBlock,
+ dev->allocationPage);
- obj->hdrChunk = cp->hdrChunk;
- obj->variantType = cp->variantType;
- obj->deleted = cp->deleted;
- obj->softDeleted = cp->softDeleted;
- obj->unlinked = cp->unlinked;
- obj->fake = cp->fake;
- obj->renameAllowed = cp->renameAllowed;
- obj->unlinkAllowed = cp->unlinkAllowed;
- obj->serial = cp->serial;
- obj->nDataChunks = cp->nDataChunks;
+ dev->allocationPage++;
- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
- obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
- else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
- obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
+ dev->nFreeChunks--;
- if (obj->hdrChunk > 0)
- obj->lazyLoaded = 1;
- return 1;
-}
+ /* If the block is full set the state to full */
+ if (dev->allocationPage >= dev->param.nChunksPerBlock) {
+ bi->blockState = YAFFS_BLOCK_STATE_FULL;
+ dev->allocationBlock = -1;
+ }
+ if (blockUsedPtr)
+ *blockUsedPtr = bi;
+ return retVal;
+ }
-static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
- __u32 level, int chunkOffset)
-{
- int i;
- yaffs_Device *dev = in->myDev;
- int ok = 1;
- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
+ return -1;
+}
+static int yaffs_GetErasedChunks(yaffs_Device *dev)
+{
+ int n;
- if (tn) {
- if (level > 0) {
+ n = dev->nErasedBlocks * dev->param.nChunksPerBlock;
- for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
- if (tn->internal[i]) {
- ok = yaffs_CheckpointTnodeWorker(in,
- tn->internal[i],
- level - 1,
- (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
- }
- }
- } else if (level == 0) {
- __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
- ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
- if (ok)
- ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
- }
- }
+ if (dev->allocationBlock > 0)
+ n += (dev->param.nChunksPerBlock - dev->allocationPage);
- return ok;
+ return n;
}
-static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
+/*
+ * yaffs_SkipRestOfBlock() skips over the rest of the allocation block
+ * if we don't want to write to it.
+ */
+void yaffs_SkipRestOfBlock(yaffs_Device *dev)
{
- __u32 endMarker = ~0;
- int ok = 1;
-
- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
- ok = yaffs_CheckpointTnodeWorker(obj,
- obj->variant.fileVariant.top,
- obj->variant.fileVariant.topLevel,
- 0);
- if (ok)
- ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
- sizeof(endMarker));
+ if(dev->allocationBlock > 0){
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
+ if(bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING){
+ bi->blockState = YAFFS_BLOCK_STATE_FULL;
+ dev->allocationBlock = -1;
+ }
}
-
- return ok ? 1 : 0;
}
-static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
-{
- __u32 baseChunk;
- int ok = 1;
- yaffs_Device *dev = obj->myDev;
- yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
- yaffs_Tnode *tn;
- int nread = 0;
- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
+static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
+ int wholeBlock)
+{
+ int oldChunk;
+ int newChunk;
+ int markNAND;
+ int retVal = YAFFS_OK;
+ int i;
+ int isCheckpointBlock;
+ int matchingChunk;
+ int maxCopies;
- ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
+ int chunksBefore = yaffs_GetErasedChunks(dev);
+ int chunksAfter;
- while (ok && (~baseChunk)) {
- nread++;
- /* Read level 0 tnode */
+ yaffs_ExtendedTags tags;
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
- tn = yaffs_GetTnodeRaw(dev);
- if (tn)
- ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
- else
- ok = 0;
+ yaffs_Object *object;
- if (tn && ok)
- ok = yaffs_AddOrFindLevel0Tnode(dev,
- fileStructPtr,
- baseChunk,
- tn) ? 1 : 0;
+ isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
- if (ok)
- ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
- }
+ T(YAFFS_TRACE_TRACING,
+ (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
+ block,
+ bi->pagesInUse,
+ bi->hasShrinkHeader,
+ wholeBlock));
- T(YAFFS_TRACE_CHECKPOINT, (
- TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
- nread, baseChunk, ok));
+ /*yaffs_VerifyFreeChunks(dev); */
- return ok ? 1 : 0;
-}
+ if(bi->blockState == YAFFS_BLOCK_STATE_FULL)
+ bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
+
+ bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
+ dev->gcDisable = 1;
-static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
-{
- yaffs_Object *obj;
- yaffs_CheckpointObject cp;
- int i;
- int ok = 1;
- struct ylist_head *lh;
+ if (isCheckpointBlock ||
+ !yaffs_StillSomeChunkBits(dev, block)) {
+ T(YAFFS_TRACE_TRACING,
+ (TSTR
+ ("Collecting block %d that has no chunks in use" TENDSTR),
+ block));
+ yaffs_BlockBecameDirty(dev, block);
+ } else {
+ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
- /* Iterate through the objects in each hash entry,
- * dumping them to the checkpointing stream.
- */
+ yaffs_VerifyBlock(dev, bi, block);
- for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
- ylist_for_each(lh, &dev->objectBucket[i].list) {
- if (lh) {
- obj = ylist_entry(lh, yaffs_Object, hashLink);
- if (!obj->deferedFree) {
- yaffs_ObjectToCheckpointObject(&cp, obj);
- cp.structType = sizeof(cp);
-
- T(YAFFS_TRACE_CHECKPOINT, (
- TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
- cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, (unsigned) obj));
+ maxCopies = (wholeBlock) ? dev->param.nChunksPerBlock : 5;
+ oldChunk = block * dev->param.nChunksPerBlock + dev->gcChunk;
- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+ for (/* init already done */;
+ retVal == YAFFS_OK &&
+ dev->gcChunk < dev->param.nChunksPerBlock &&
+ (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
+ maxCopies > 0;
+ dev->gcChunk++, oldChunk++) {
+ if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
- if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
- ok = yaffs_WriteCheckpointTnodes(obj);
- }
- }
- }
- }
+ /* This page is in use and might need to be copied off */
- /* Dump end of list */
- memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
- cp.structType = sizeof(cp);
+ maxCopies--;
- if (ok)
- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+ markNAND = 1;
- return ok ? 1 : 0;
-}
+ yaffs_InitialiseTags(&tags);
-static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
-{
- yaffs_Object *obj;
- yaffs_CheckpointObject cp;
- int ok = 1;
- int done = 0;
- yaffs_Object *hardList = NULL;
+ yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
+ buffer, &tags);
- while (ok && !done) {
- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
- if (cp.structType != sizeof(cp)) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
- cp.structType, sizeof(cp), ok));
- ok = 0;
- }
-
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
- cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
-
- if (ok && cp.objectId == ~0)
- done = 1;
- else if (ok) {
- obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
- if (obj) {
- ok = yaffs_CheckpointObjectToObject(obj, &cp);
- if (!ok)
- break;
- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
- ok = yaffs_ReadCheckpointTnodes(obj);
- } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
- obj->hardLinks.next =
- (struct ylist_head *) hardList;
- hardList = obj;
- }
- } else
- ok = 0;
- }
- }
+ object =
+ yaffs_FindObjectByNumber(dev,
+ tags.objectId);
- if (ok)
- yaffs_HardlinkFixup(dev, hardList);
+ T(YAFFS_TRACE_GC_DETAIL,
+ (TSTR
+ ("Collecting chunk in block %d, %d %d %d " TENDSTR),
+ dev->gcChunk, tags.objectId, tags.chunkId,
+ tags.byteCount));
- return ok ? 1 : 0;
-}
+ if (object && !yaffs_SkipVerification(dev)) {
+ if (tags.chunkId == 0)
+ matchingChunk = object->hdrChunk;
+ else if (object->softDeleted)
+ matchingChunk = oldChunk; /* Defeat the test */
+ else
+ matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
-static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
-{
- __u32 checkpointSum;
- int ok;
+ if (oldChunk != matchingChunk)
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
+ oldChunk, matchingChunk, tags.objectId, tags.chunkId));
- yaffs_GetCheckpointSum(dev, &checkpointSum);
+ }
- ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
+ if (!object) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("page %d in gc has no object: %d %d %d "
+ TENDSTR), oldChunk,
+ tags.objectId, tags.chunkId, tags.byteCount));
+ }
- if (!ok)
- return 0;
+ if (object &&
+ object->deleted &&
+ object->softDeleted &&
+ tags.chunkId != 0) {
+ /* Data chunk in a soft deleted file, throw it away
+ * It's a soft deleted data chunk,
+ * No need to copy this, just forget about it and
+ * fix up the object.
+ */
+
+ /* Free chunks already includes softdeleted chunks.
+ * How ever this chunk is going to soon be really deleted
+ * which will increment free chunks.
+ * We have to decrement free chunks so this works out properly.
+ */
+ dev->nFreeChunks--;
+ bi->softDeletions--;
- return 1;
-}
+ object->nDataChunks--;
-static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
-{
- __u32 checkpointSum0;
- __u32 checkpointSum1;
- int ok;
+ if (object->nDataChunks <= 0) {
+ /* remeber to clean up the object */
+ dev->gcCleanupList[dev->nCleanups] =
+ tags.objectId;
+ dev->nCleanups++;
+ }
+ markNAND = 0;
+ } else if (0) {
+ /* Todo object && object->deleted && object->nDataChunks == 0 */
+ /* Deleted object header with no data chunks.
+ * Can be discarded and the file deleted.
+ */
+ object->hdrChunk = 0;
+ yaffs_FreeTnode(object->myDev,
+ object->variant.
+ fileVariant.top);
+ object->variant.fileVariant.top = NULL;
+ yaffs_DoGenericObjectDeletion(object);
- yaffs_GetCheckpointSum(dev, &checkpointSum0);
+ } else if (object) {
+ /* It's either a data chunk in a live file or
+ * an ObjectHeader, so we're interested in it.
+ * NB Need to keep the ObjectHeaders of deleted files
+ * until the whole file has been deleted off
+ */
+ tags.serialNumber++;
- ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
+ dev->nGCCopies++;
- if (!ok)
- return 0;
+ if (tags.chunkId == 0) {
+ /* It is an object Id,
+ * We need to nuke the shrinkheader flags first
+ * Also need to clean up shadowing.
+ * We no longer want the shrinkHeader flag since its work is done
+ * and if it is left in place it will mess up scanning.
+ */
- if (checkpointSum0 != checkpointSum1)
- return 0;
+ yaffs_ObjectHeader *oh;
+ oh = (yaffs_ObjectHeader *)buffer;
- return 1;
-}
+ oh->isShrink = 0;
+ tags.extraIsShrinkHeader = 0;
+ oh->shadowsObject = 0;
+ oh->inbandShadowsObject = 0;
+ tags.extraShadows = 0;
+
+ /* Update file size */
+ if(object->variantType == YAFFS_OBJECT_TYPE_FILE){
+ oh->fileSize = object->variant.fileVariant.fileSize;
+ tags.extraFileLength = oh->fileSize;
+ }
-static int yaffs_WriteCheckpointData(yaffs_Device *dev)
-{
- int ok = 1;
+ yaffs_VerifyObjectHeader(object, oh, &tags, 1);
+ newChunk =
+ yaffs_WriteNewChunkWithTagsToNAND(dev,(__u8 *) oh, &tags, 1);
+ } else
+ newChunk =
+ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
- if (dev->skipCheckpointWrite || !dev->isYaffs2) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
- ok = 0;
- }
+ if (newChunk < 0) {
+ retVal = YAFFS_FAIL;
+ } else {
- if (ok)
- ok = yaffs_CheckpointOpen(dev, 1);
+ /* Ok, now fix up the Tnodes etc. */
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
- ok = yaffs_WriteCheckpointValidityMarker(dev, 1);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
- ok = yaffs_WriteCheckpointDevice(dev);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
- ok = yaffs_WriteCheckpointObjects(dev);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
- ok = yaffs_WriteCheckpointValidityMarker(dev, 0);
- }
+ if (tags.chunkId == 0) {
+ /* It's a header */
+ object->hdrChunk = newChunk;
+ object->serial = tags.serialNumber;
+ } else {
+ /* It's a data chunk */
+ int ok;
+ ok = yaffs_PutChunkIntoFile
+ (object,
+ tags.chunkId,
+ newChunk, 0);
+ }
+ }
+ }
- if (ok)
- ok = yaffs_WriteCheckpointSum(dev);
+ if (retVal == YAFFS_OK)
+ yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
- if (!yaffs_CheckpointClose(dev))
- ok = 0;
+ }
+ }
- if (ok)
- dev->isCheckpointed = 1;
- else
- dev->isCheckpointed = 0;
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
- return dev->isCheckpointed;
-}
-static int yaffs_ReadCheckpointData(yaffs_Device *dev)
-{
- int ok = 1;
- if (dev->skipCheckpointRead || !dev->isYaffs2) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
- ok = 0;
}
- if (ok)
- ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
-
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
- ok = yaffs_ReadCheckpointValidityMarker(dev, 1);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
- ok = yaffs_ReadCheckpointDevice(dev);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
- ok = yaffs_ReadCheckpointObjects(dev);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
- ok = yaffs_ReadCheckpointValidityMarker(dev, 0);
- }
+ yaffs_VerifyCollectedBlock(dev, bi, block);
- if (ok) {
- ok = yaffs_ReadCheckpointSum(dev);
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
- }
- if (!yaffs_CheckpointClose(dev))
- ok = 0;
- if (ok)
- dev->isCheckpointed = 1;
- else
- dev->isCheckpointed = 0;
+ if (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
+ /*
+ * The gc did not complete. Set block state back to FULL
+ * because checkpointing does not restore gc.
+ */
+ bi->blockState = YAFFS_BLOCK_STATE_FULL;
+ } else {
+ /* The gc completed. */
+ /* Do any required cleanups */
+ for (i = 0; i < dev->nCleanups; i++) {
+ /* Time to delete the file too */
+ object =
+ yaffs_FindObjectByNumber(dev,
+ dev->gcCleanupList[i]);
+ if (object) {
+ yaffs_FreeTnode(dev,
+ object->variant.fileVariant.
+ top);
+ object->variant.fileVariant.top = NULL;
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("yaffs: About to finally delete object %d"
+ TENDSTR), object->objectId));
+ yaffs_DoGenericObjectDeletion(object);
+ object->myDev->nDeletedFiles--;
+ }
- return ok ? 1 : 0;
+ }
-}
-static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
-{
- if (dev->isCheckpointed ||
- dev->blocksInCheckpoint > 0) {
- dev->isCheckpointed = 0;
- yaffs_CheckpointInvalidateStream(dev);
- if (dev->superBlock && dev->markSuperBlockDirty)
- dev->markSuperBlockDirty(dev->superBlock);
+ chunksAfter = yaffs_GetErasedChunks(dev);
+ if (chunksBefore >= chunksAfter) {
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("gc did not increase free chunks before %d after %d"
+ TENDSTR), chunksBefore, chunksAfter));
+ }
+ dev->gcBlock = 0;
+ dev->gcChunk = 0;
+ dev->nCleanups = 0;
}
-}
+ dev->gcDisable = 0;
-int yaffs_CheckpointSave(yaffs_Device *dev)
-{
-
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+ return retVal;
+}
- yaffs_VerifyObjects(dev);
- yaffs_VerifyBlocks(dev);
- yaffs_VerifyFreeChunks(dev);
+/*
+ * FindBlockForgarbageCollection is used to select the dirtiest block (or close enough)
+ * for garbage collection.
+ */
- if (!dev->isCheckpointed) {
- yaffs_InvalidateCheckpoint(dev);
- yaffs_WriteCheckpointData(dev);
- }
+static unsigned yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
+ int aggressive,
+ int background)
+{
+ int i;
+ int iterations;
+ unsigned selected = 0;
+ int prioritised = 0;
+ int prioritisedExists = 0;
+ yaffs_BlockInfo *bi;
+ int threshold;
- T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+ /* First let's see if we need to grab a prioritised block */
+ if (dev->hasPendingPrioritisedGCs && !aggressive) {
+ dev->gcDirtiest = 0;
+ bi = dev->blockInfo;
+ for (i = dev->internalStartBlock;
+ i <= dev->internalEndBlock && !selected;
+ i++) {
- return dev->isCheckpointed;
-}
+ if (bi->gcPrioritise) {
+ prioritisedExists = 1;
+ if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+ yaffs2_BlockNotDisqualifiedFromGC(dev, bi)) {
+ selected = i;
+ prioritised = 1;
+ }
+ }
+ bi++;
+ }
-int yaffs_CheckpointRestore(yaffs_Device *dev)
-{
- int retval;
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+ /*
+ * If there is a prioritised block and none was selected then
+ * this happened because there is at least one old dirty block gumming
+ * up the works. Let's gc the oldest dirty block.
+ */
- retval = yaffs_ReadCheckpointData(dev);
+ if(prioritisedExists &&
+ !selected &&
+ dev->oldestDirtyBlock > 0)
+ selected = dev->oldestDirtyBlock;
- if (dev->isCheckpointed) {
- yaffs_VerifyObjects(dev);
- yaffs_VerifyBlocks(dev);
- yaffs_VerifyFreeChunks(dev);
+ if (!prioritisedExists) /* None found, so we can clear this */
+ dev->hasPendingPrioritisedGCs = 0;
}
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+ /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
+ * search harder.
+ * else (we're doing a leasurely gc), then we only bother to do this if the
+ * block has only a few pages in use.
+ */
- return retval;
-}
+ if (!selected){
+ int pagesUsed;
+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
+ if (aggressive){
+ threshold = dev->param.nChunksPerBlock;
+ iterations = nBlocks;
+ } else {
+ int maxThreshold;
-/*--------------------- File read/write ------------------------
- * Read and write have very similar structures.
- * In general the read/write has three parts to it
- * An incomplete chunk to start with (if the read/write is not chunk-aligned)
- * Some complete chunks
- * An incomplete chunk to end off with
- *
- * Curve-balls: the first chunk might also be the last chunk.
- */
+ if(background)
+ maxThreshold = dev->param.nChunksPerBlock/2;
+ else
+ maxThreshold = dev->param.nChunksPerBlock/8;
-int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
- int nBytes)
-{
+ if(maxThreshold < YAFFS_GC_PASSIVE_THRESHOLD)
+ maxThreshold = YAFFS_GC_PASSIVE_THRESHOLD;
- int chunk;
- __u32 start;
- int nToCopy;
- int n = nBytes;
- int nDone = 0;
- yaffs_ChunkCache *cache;
+ threshold = background ?
+ (dev->gcNotDone + 2) * 2 : 0;
+ if(threshold <YAFFS_GC_PASSIVE_THRESHOLD)
+ threshold = YAFFS_GC_PASSIVE_THRESHOLD;
+ if(threshold > maxThreshold)
+ threshold = maxThreshold;
- yaffs_Device *dev;
+ iterations = nBlocks / 16 + 1;
+ if (iterations > 100)
+ iterations = 100;
+ }
- dev = in->myDev;
+ for (i = 0;
+ i < iterations &&
+ (dev->gcDirtiest < 1 ||
+ dev->gcPagesInUse > YAFFS_GC_GOOD_ENOUGH);
+ i++) {
+ dev->gcBlockFinder++;
+ if (dev->gcBlockFinder < dev->internalStartBlock ||
+ dev->gcBlockFinder > dev->internalEndBlock)
+ dev->gcBlockFinder = dev->internalStartBlock;
- while (n > 0) {
- /* chunk = offset / dev->nDataBytesPerChunk + 1; */
- /* start = offset % dev->nDataBytesPerChunk; */
- yaffs_AddrToChunk(dev, offset, &chunk, &start);
- chunk++;
+ bi = yaffs_GetBlockInfo(dev, dev->gcBlockFinder);
- /* OK now check for the curveball where the start and end are in
- * the same chunk.
- */
- if ((start + n) < dev->nDataBytesPerChunk)
- nToCopy = n;
- else
- nToCopy = dev->nDataBytesPerChunk - start;
+ pagesUsed = bi->pagesInUse - bi->softDeletions;
- cache = yaffs_FindChunkCache(in, chunk);
+ if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+ pagesUsed < dev->param.nChunksPerBlock &&
+ (dev->gcDirtiest < 1 || pagesUsed < dev->gcPagesInUse) &&
+ yaffs2_BlockNotDisqualifiedFromGC(dev, bi)) {
+ dev->gcDirtiest = dev->gcBlockFinder;
+ dev->gcPagesInUse = pagesUsed;
+ }
+ }
- /* If the chunk is already in the cache or it is less than a whole chunk
- * or we're using inband tags then use the cache (if there is caching)
- * else bypass the cache.
- */
- if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
- if (dev->nShortOpCaches > 0) {
+ if(dev->gcDirtiest > 0 && dev->gcPagesInUse <= threshold)
+ selected = dev->gcDirtiest;
+ }
+
+ /*
+ * If nothing has been selected for a while, try selecting the oldest dirty
+ * because that's gumming up the works.
+ */
- /* If we can't find the data in the cache, then load it up. */
+ if(!selected && dev->param.isYaffs2 &&
+ dev->gcNotDone >= ( background ? 10 : 20)){
+ yaffs2_FindOldestDirtySequence(dev);
+ if(dev->oldestDirtyBlock > 0) {
+ selected = dev->oldestDirtyBlock;
+ dev->gcDirtiest = selected;
+ dev->oldestDirtyGCs++;
+ bi = yaffs_GetBlockInfo(dev, selected);
+ dev->gcPagesInUse = bi->pagesInUse - bi->softDeletions;
+ } else
+ dev->gcNotDone = 0;
+ }
- if (!cache) {
- cache = yaffs_GrabChunkCache(in->myDev);
- cache->object = in;
- cache->chunkId = chunk;
- cache->dirty = 0;
- cache->locked = 0;
- yaffs_ReadChunkDataFromObject(in, chunk,
- cache->
- data);
- cache->nBytes = 0;
- }
+ if(selected){
+ T(YAFFS_TRACE_GC,
+ (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR),
+ selected,
+ dev->param.nChunksPerBlock - dev->gcPagesInUse,
+ prioritised));
+
+ dev->nGCBlocks++;
+ if(background)
+ dev->backgroundGCs++;
+
+ dev->gcDirtiest = 0;
+ dev->gcPagesInUse = 0;
+ dev->gcNotDone = 0;
+ if(dev->refreshSkip > 0)
+ dev->refreshSkip--;
+ } else{
+ dev->gcNotDone++;
+ T(YAFFS_TRACE_GC,
+ (TSTR("GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s" TENDSTR),
+ dev->gcBlockFinder, dev->gcNotDone,
+ threshold,
+ dev->gcDirtiest, dev->gcPagesInUse,
+ dev->oldestDirtyBlock,
+ background ? " bg" : ""));
+ }
- yaffs_UseChunkCache(dev, cache, 0);
+ return selected;
+}
- cache->locked = 1;
+/* New garbage collector
+ * If we're very low on erased blocks then we do aggressive garbage collection
+ * otherwise we do "leasurely" garbage collection.
+ * Aggressive gc looks further (whole array) and will accept less dirty blocks.
+ * Passive gc only inspects smaller areas and will only accept more dirty blocks.
+ *
+ * The idea is to help clear out space in a more spread-out manner.
+ * Dunno if it really does anything useful.
+ */
+static int yaffs_CheckGarbageCollection(yaffs_Device *dev, int background)
+{
+ int aggressive = 0;
+ int gcOk = YAFFS_OK;
+ int maxTries = 0;
+ int minErased;
+ int erasedChunks;
+ int checkpointBlockAdjust;
+ if(dev->param.gcControl &&
+ (dev->param.gcControl(dev) & 1) == 0)
+ return YAFFS_OK;
- memcpy(buffer, &cache->data[start], nToCopy);
+ if (dev->gcDisable) {
+ /* Bail out so we don't get recursive gc */
+ return YAFFS_OK;
+ }
- cache->locked = 0;
- } else {
- /* Read into the local buffer then copy..*/
+ /* This loop should pass the first time.
+ * We'll only see looping here if the collection does not increase space.
+ */
- __u8 *localBuffer =
- yaffs_GetTempBuffer(dev, __LINE__);
- yaffs_ReadChunkDataFromObject(in, chunk,
- localBuffer);
+ do {
+ maxTries++;
- memcpy(buffer, &localBuffer[start], nToCopy);
+ checkpointBlockAdjust = yaffs2_CalcCheckpointBlocksRequired(dev);
+ minErased = dev->param.nReservedBlocks + checkpointBlockAdjust + 1;
+ erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
- yaffs_ReleaseTempBuffer(dev, localBuffer,
- __LINE__);
+ /* If we need a block soon then do aggressive gc.*/
+ if (dev->nErasedBlocks < minErased)
+ aggressive = 1;
+ else {
+ if(!background && erasedChunks > (dev->nFreeChunks / 4))
+ break;
+
+ if(dev->gcSkip > 20)
+ dev->gcSkip = 20;
+ if(erasedChunks < dev->nFreeChunks/2 ||
+ dev->gcSkip < 1 ||
+ background)
+ aggressive = 0;
+ else {
+ dev->gcSkip--;
+ break;
}
+ }
- } else {
+ dev->gcSkip = 5;
- /* A full chunk. Read directly into the supplied buffer. */
- yaffs_ReadChunkDataFromObject(in, chunk, buffer);
+ /* If we don't already have a block being gc'd then see if we should start another */
+ if (dev->gcBlock < 1 && !aggressive) {
+ dev->gcBlock = yaffs2_FindRefreshBlock(dev);
+ dev->gcChunk = 0;
+ dev->nCleanups=0;
+ }
+ if (dev->gcBlock < 1) {
+ dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive, background);
+ dev->gcChunk = 0;
+ dev->nCleanups=0;
}
- n -= nToCopy;
- offset += nToCopy;
- buffer += nToCopy;
- nDone += nToCopy;
+ if (dev->gcBlock > 0) {
+ dev->allGCs++;
+ if (!aggressive)
+ dev->passiveGCs++;
- }
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
+ dev->nErasedBlocks, aggressive));
- return nDone;
+ gcOk = yaffs_GarbageCollectBlock(dev, dev->gcBlock, aggressive);
+ }
+
+ if (dev->nErasedBlocks < (dev->param.nReservedBlocks) && dev->gcBlock > 0) {
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
+ TENDSTR), dev->nErasedBlocks, maxTries, dev->gcBlock));
+ }
+ } while ((dev->nErasedBlocks < dev->param.nReservedBlocks) &&
+ (dev->gcBlock > 0) &&
+ (maxTries < 2));
+
+ return aggressive ? gcOk : YAFFS_OK;
}
-int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
- int nBytes, int writeThrough)
+/*
+ * yaffs_BackgroundGarbageCollect()
+ * Garbage collects. Intended to be called from a background thread.
+ * Returns non-zero if at least half the free chunks are erased.
+ */
+int yaffs_BackgroundGarbageCollect(yaffs_Device *dev, unsigned urgency)
{
+ int erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
- int chunk;
- __u32 start;
- int nToCopy;
- int n = nBytes;
- int nDone = 0;
- int nToWriteBack;
- int startOfWrite = offset;
- int chunkWritten = 0;
- __u32 nBytesRead;
- __u32 chunkStart;
+ T(YAFFS_TRACE_BACKGROUND, (TSTR("Background gc %u" TENDSTR),urgency));
- yaffs_Device *dev;
+ yaffs_CheckGarbageCollection(dev, 1);
+ return erasedChunks > dev->nFreeChunks/2;
+}
- dev = in->myDev;
+/*------------------------- TAGS --------------------------------*/
- while (n > 0 && chunkWritten >= 0) {
- /* chunk = offset / dev->nDataBytesPerChunk + 1; */
- /* start = offset % dev->nDataBytesPerChunk; */
- yaffs_AddrToChunk(dev, offset, &chunk, &start);
+static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
+ int chunkInObject)
+{
+ return (tags->chunkId == chunkInObject &&
+ tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
- if (chunk * dev->nDataBytesPerChunk + start != offset ||
- start >= dev->nDataBytesPerChunk) {
- T(YAFFS_TRACE_ERROR, (
- TSTR("AddrToChunk of offset %d gives chunk %d start %d"
- TENDSTR),
- (int)offset, chunk, start));
- }
- chunk++;
+}
- /* OK now check for the curveball where the start and end are in
- * the same chunk.
- */
- if ((start + n) < dev->nDataBytesPerChunk) {
- nToCopy = n;
+/*-------------------- Data file manipulation -----------------*/
- /* Now folks, to calculate how many bytes to write back....
- * If we're overwriting and not writing to then end of file then
- * we need to write back as much as was there before.
- */
+static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
+ yaffs_ExtendedTags *tags)
+{
+ /*Get the Tnode, then get the level 0 offset chunk offset */
+ yaffs_Tnode *tn;
+ int theChunk = -1;
+ yaffs_ExtendedTags localTags;
+ int retVal = -1;
- chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
+ yaffs_Device *dev = in->myDev;
- if (chunkStart > in->variant.fileVariant.fileSize)
- nBytesRead = 0; /* Past end of file */
- else
- nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
+ if (!tags) {
+ /* Passed a NULL, so use our own tags space */
+ tags = &localTags;
+ }
- if (nBytesRead > dev->nDataBytesPerChunk)
- nBytesRead = dev->nDataBytesPerChunk;
+ tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
- nToWriteBack =
- (nBytesRead >
- (start + n)) ? nBytesRead : (start + n);
+ if (tn) {
+ theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
- if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
- YBUG();
+ retVal =
+ yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
+ chunkInInode);
+ }
+ return retVal;
+}
- } else {
- nToCopy = dev->nDataBytesPerChunk - start;
- nToWriteBack = dev->nDataBytesPerChunk;
- }
+static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
+ yaffs_ExtendedTags *tags)
+{
+ /* Get the Tnode, then get the level 0 offset chunk offset */
+ yaffs_Tnode *tn;
+ int theChunk = -1;
+ yaffs_ExtendedTags localTags;
- if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
- /* An incomplete start or end chunk (or maybe both start and end chunk),
- * or we're using inband tags, so we want to use the cache buffers.
- */
- if (dev->nShortOpCaches > 0) {
- yaffs_ChunkCache *cache;
- /* If we can't find the data in the cache, then load the cache */
- cache = yaffs_FindChunkCache(in, chunk);
+ yaffs_Device *dev = in->myDev;
+ int retVal = -1;
- if (!cache
- && yaffs_CheckSpaceForAllocation(in->
- myDev)) {
- cache = yaffs_GrabChunkCache(in->myDev);
- cache->object = in;
- cache->chunkId = chunk;
- cache->dirty = 0;
- cache->locked = 0;
- yaffs_ReadChunkDataFromObject(in, chunk,
- cache->
- data);
- } else if (cache &&
- !cache->dirty &&
- !yaffs_CheckSpaceForAllocation(in->myDev)) {
- /* Drop the cache if it was a read cache item and
- * no space check has been made for it.
- */
- cache = NULL;
- }
+ if (!tags) {
+ /* Passed a NULL, so use our own tags space */
+ tags = &localTags;
+ }
- if (cache) {
- yaffs_UseChunkCache(dev, cache, 1);
- cache->locked = 1;
+ tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
+ if (tn) {
- memcpy(&cache->data[start], buffer,
- nToCopy);
+ theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+ retVal =
+ yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
+ chunkInInode);
- cache->locked = 0;
- cache->nBytes = nToWriteBack;
+ /* Delete the entry in the filestructure (if found) */
+ if (retVal != -1)
+ yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, 0);
+ }
- if (writeThrough) {
- chunkWritten =
- yaffs_WriteChunkDataToObject
- (cache->object,
- cache->chunkId,
- cache->data, cache->nBytes,
- 1);
- cache->dirty = 0;
- }
+ return retVal;
+}
- } else {
- chunkWritten = -1; /* fail the write */
- }
- } else {
- /* An incomplete start or end chunk (or maybe both start and end chunk)
- * Read into the local buffer then copy, then copy over and write back.
- */
- __u8 *localBuffer =
- yaffs_GetTempBuffer(dev, __LINE__);
+int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
+ int chunkInNAND, int inScan)
+{
+ /* NB inScan is zero unless scanning.
+ * For forward scanning, inScan is > 0;
+ * for backward scanning inScan is < 0
+ *
+ * chunkInNAND = 0 is a dummy insert to make sure the tnodes are there.
+ */
+
+ yaffs_Tnode *tn;
+ yaffs_Device *dev = in->myDev;
+ int existingChunk;
+ yaffs_ExtendedTags existingTags;
+ yaffs_ExtendedTags newTags;
+ unsigned existingSerial, newSerial;
+
+ if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
+ /* Just ignore an attempt at putting a chunk into a non-file during scanning
+ * If it is not during Scanning then something went wrong!
+ */
+ if (!inScan) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs tragedy:attempt to put data chunk into a non-file"
+ TENDSTR)));
+ YBUG();
+ }
- yaffs_ReadChunkDataFromObject(in, chunk,
- localBuffer);
+ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
+ return YAFFS_OK;
+ }
+ tn = yaffs_AddOrFindLevel0Tnode(dev,
+ &in->variant.fileVariant,
+ chunkInInode,
+ NULL);
+ if (!tn)
+ return YAFFS_FAIL;
+
+ if(!chunkInNAND)
+ /* Dummy insert, bail now */
+ return YAFFS_OK;
+ existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
- memcpy(&localBuffer[start], buffer, nToCopy);
+ if (inScan != 0) {
+ /* If we're scanning then we need to test for duplicates
+ * NB This does not need to be efficient since it should only ever
+ * happen when the power fails during a write, then only one
+ * chunk should ever be affected.
+ *
+ * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
+ * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
+ */
- chunkWritten =
- yaffs_WriteChunkDataToObject(in, chunk,
- localBuffer,
- nToWriteBack,
- 0);
+ if (existingChunk > 0) {
+ /* NB Right now existing chunk will not be real chunkId if the chunk group size > 1
+ * thus we have to do a FindChunkInFile to get the real chunk id.
+ *
+ * We have a duplicate now we need to decide which one to use:
+ *
+ * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
+ * Forward scanning YAFFS2: The new one is what we use, dump the old one.
+ * YAFFS1: Get both sets of tags and compare serial numbers.
+ */
- yaffs_ReleaseTempBuffer(dev, localBuffer,
- __LINE__);
+ if (inScan > 0) {
+ /* Only do this for forward scanning */
+ yaffs_ReadChunkWithTagsFromNAND(dev,
+ chunkInNAND,
+ NULL, &newTags);
+ /* Do a proper find */
+ existingChunk =
+ yaffs_FindChunkInFile(in, chunkInInode,
+ &existingTags);
}
- } else {
- /* A full chunk. Write directly from the supplied buffer. */
+ if (existingChunk <= 0) {
+ /*Hoosterman - how did this happen? */
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs tragedy: existing chunk < 0 in scan"
+ TENDSTR)));
+ }
- chunkWritten =
- yaffs_WriteChunkDataToObject(in, chunk, buffer,
- dev->nDataBytesPerChunk,
- 0);
+ /* NB The deleted flags should be false, otherwise the chunks will
+ * not be loaded during a scan
+ */
- /* Since we've overwritten the cached data, we better invalidate it. */
- yaffs_InvalidateChunkCache(in, chunk);
- }
+ if (inScan > 0) {
+ newSerial = newTags.serialNumber;
+ existingSerial = existingTags.serialNumber;
+ }
- if (chunkWritten >= 0) {
- n -= nToCopy;
- offset += nToCopy;
- buffer += nToCopy;
- nDone += nToCopy;
+ if ((inScan > 0) &&
+ (existingChunk <= 0 ||
+ ((existingSerial + 1) & 3) == newSerial)) {
+ /* Forward scanning.
+ * Use new
+ * Delete the old one and drop through to update the tnode
+ */
+ yaffs_DeleteChunk(dev, existingChunk, 1,
+ __LINE__);
+ } else {
+ /* Backward scanning or we want to use the existing one
+ * Use existing.
+ * Delete the new one and return early so that the tnode isn't changed
+ */
+ yaffs_DeleteChunk(dev, chunkInNAND, 1,
+ __LINE__);
+ return YAFFS_OK;
+ }
}
}
- /* Update file object */
-
- if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
- in->variant.fileVariant.fileSize = (startOfWrite + nDone);
+ if (existingChunk == 0)
+ in->nDataChunks++;
- in->dirty = 1;
+ yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
- return nDone;
+ return YAFFS_OK;
}
+static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
+ __u8 *buffer)
+{
+ int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
-/* ---------------------- File resizing stuff ------------------ */
+ if (chunkInNAND >= 0)
+ return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
+ buffer, NULL);
+ else {
+ T(YAFFS_TRACE_NANDACCESS,
+ (TSTR("Chunk %d not found zero instead" TENDSTR),
+ chunkInNAND));
+ /* get sane (zero) data if you read a hole */
+ memset(buffer, 0, in->myDev->nDataBytesPerChunk);
+ return 0;
+ }
-static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
-{
+}
- yaffs_Device *dev = in->myDev;
- int oldFileSize = in->variant.fileVariant.fileSize;
+void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
+{
+ int block;
+ int page;
+ yaffs_ExtendedTags tags;
+ yaffs_BlockInfo *bi;
- int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
+ if (chunkId <= 0)
+ return;
- int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
- dev->nDataBytesPerChunk;
- int i;
- int chunkId;
+ dev->nDeletions++;
+ block = chunkId / dev->param.nChunksPerBlock;
+ page = chunkId % dev->param.nChunksPerBlock;
- /* Delete backwards so that we don't end up with holes if
- * power is lost part-way through the operation.
- */
- for (i = lastDel; i >= startDel; i--) {
- /* NB this could be optimised somewhat,
- * eg. could retrieve the tags and write them without
- * using yaffs_DeleteChunk
- */
- chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
- if (chunkId > 0) {
- if (chunkId <
- (dev->internalStartBlock * dev->nChunksPerBlock)
- || chunkId >=
- ((dev->internalEndBlock +
- 1) * dev->nChunksPerBlock)) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("Found daft chunkId %d for %d" TENDSTR),
- chunkId, i));
- } else {
- in->nDataChunks--;
- yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
- }
- }
- }
+ if (!yaffs_CheckChunkBit(dev, block, page))
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Deleting invalid chunk %d"TENDSTR),
+ chunkId));
-}
+ bi = yaffs_GetBlockInfo(dev, block);
+
+ yaffs2_UpdateOldestDirtySequence(dev, block, bi);
-int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
-{
+ T(YAFFS_TRACE_DELETION,
+ (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
- int oldFileSize = in->variant.fileVariant.fileSize;
- __u32 newSizeOfPartialChunk;
- int newFullChunks;
+ if (!dev->param.isYaffs2 && markNAND &&
+ bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
- yaffs_Device *dev = in->myDev;
+ yaffs_InitialiseTags(&tags);
- yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
+ tags.chunkDeleted = 1;
- yaffs_FlushFilesChunkCache(in);
- yaffs_InvalidateWholeChunkCache(in);
+ yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
+ yaffs_HandleUpdateChunk(dev, chunkId, &tags);
+ } else {
+ dev->nUnmarkedDeletions++;
+ }
- yaffs_CheckGarbageCollection(dev);
+ /* Pull out of the management area.
+ * If the whole block became dirty, this will kick off an erasure.
+ */
+ if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
+ bi->blockState == YAFFS_BLOCK_STATE_FULL ||
+ bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+ bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
+ dev->nFreeChunks++;
- if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
- return YAFFS_FAIL;
+ yaffs_ClearChunkBit(dev, block, page);
- if (newSize == oldFileSize)
- return YAFFS_OK;
+ bi->pagesInUse--;
- if (newSize < oldFileSize) {
+ if (bi->pagesInUse == 0 &&
+ !bi->hasShrinkHeader &&
+ bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
+ bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+ yaffs_BlockBecameDirty(dev, block);
+ }
- yaffs_PruneResizedChunks(in, newSize);
+ }
- if (newSizeOfPartialChunk != 0) {
- int lastChunk = 1 + newFullChunks;
+}
- __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
+static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
+ const __u8 *buffer, int nBytes,
+ int useReserve)
+{
+ /* Find old chunk Need to do this to get serial number
+ * Write new one and patch into tree.
+ * Invalidate old tags.
+ */
- /* Got to read and rewrite the last chunk with its new size and zero pad */
- yaffs_ReadChunkDataFromObject(in, lastChunk,
- localBuffer);
+ int prevChunkId;
+ yaffs_ExtendedTags prevTags;
- memset(localBuffer + newSizeOfPartialChunk, 0,
- dev->nDataBytesPerChunk - newSizeOfPartialChunk);
+ int newChunkId;
+ yaffs_ExtendedTags newTags;
- yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
- newSizeOfPartialChunk, 1);
+ yaffs_Device *dev = in->myDev;
- yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
- }
+ yaffs_CheckGarbageCollection(dev,0);
- in->variant.fileVariant.fileSize = newSize;
+ /* Get the previous chunk at this location in the file if it exists.
+ * If it does not exist then put a zero into the tree. This creates
+ * the tnode now, rather than later when it is harder to clean up.
+ */
+ prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
+ if(prevChunkId < 1 &&
+ !yaffs_PutChunkIntoFile(in, chunkInInode, 0, 0))
+ return 0;
- yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
- } else {
- /* newsSize > oldFileSize */
- in->variant.fileVariant.fileSize = newSize;
- }
+ /* Set up new tags */
+ yaffs_InitialiseTags(&newTags);
+ newTags.chunkId = chunkInInode;
+ newTags.objectId = in->objectId;
+ newTags.serialNumber =
+ (prevChunkId > 0) ? prevTags.serialNumber + 1 : 1;
+ newTags.byteCount = nBytes;
- /* Write a new object header.
- * show we've shrunk the file, if need be
- * Do this only if the file is not in the deleted directories.
- */
- if (in->parent &&
- in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
- in->parent->objectId != YAFFS_OBJECTID_DELETED)
- yaffs_UpdateObjectHeader(in, NULL, 0,
- (newSize < oldFileSize) ? 1 : 0, 0);
+ if (nBytes < 1 || nBytes > dev->param.totalBytesPerChunk) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
+ YBUG();
+ }
+
+
+ newChunkId =
+ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
+ useReserve);
- return YAFFS_OK;
-}
+ if (newChunkId > 0) {
+ yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
-loff_t yaffs_GetFileSize(yaffs_Object *obj)
-{
- obj = yaffs_GetEquivalentObject(obj);
+ if (prevChunkId > 0)
+ yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
- switch (obj->variantType) {
- case YAFFS_OBJECT_TYPE_FILE:
- return obj->variant.fileVariant.fileSize;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- return yaffs_strlen(obj->variant.symLinkVariant.alias);
- default:
- return 0;
+ yaffs_VerifyFileSanity(in);
}
+ return newChunkId;
+
}
+/* UpdateObjectHeader updates the header on NAND for an object.
+ * If name is not NULL, then that new name is used.
+ */
+int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
+ int isShrink, int shadows, yaffs_XAttrMod *xmod)
+{
+ yaffs_BlockInfo *bi;
-int yaffs_FlushFile(yaffs_Object *in, int updateTime)
-{
- int retVal;
- if (in->dirty) {
- yaffs_FlushFilesChunkCache(in);
- if (updateTime) {
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_WinFileTimeNow(in->win_mtime);
-#else
+ yaffs_Device *dev = in->myDev;
- in->yst_mtime = Y_CURRENT_TIME;
+ int prevChunkId;
+ int retVal = 0;
+ int result = 0;
-#endif
- }
+ int newChunkId;
+ yaffs_ExtendedTags newTags;
+ yaffs_ExtendedTags oldTags;
+ const YCHAR *alias = NULL;
- retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
- 0) ? YAFFS_OK : YAFFS_FAIL;
- } else {
- retVal = YAFFS_OK;
- }
+ __u8 *buffer = NULL;
+ YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
- return retVal;
+ yaffs_ObjectHeader *oh = NULL;
-}
+ yaffs_strcpy(oldName, _Y("silly old name"));
-static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
-{
- /* First off, invalidate the file's data in the cache, without flushing. */
- yaffs_InvalidateWholeChunkCache(in);
+ if (!in->fake ||
+ in == dev->rootDir || /* The rootDir should also be saved */
+ force || xmod) {
- if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) {
- /* Move to the unlinked directory so we have a record that it was deleted. */
- yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
+ yaffs_CheckGarbageCollection(dev,0);
+ yaffs_CheckObjectDetailsLoaded(in);
- }
+ buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
+ oh = (yaffs_ObjectHeader *) buffer;
- yaffs_RemoveObjectFromDirectory(in);
- yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
- in->hdrChunk = 0;
+ prevChunkId = in->hdrChunk;
- yaffs_FreeObject(in);
- return YAFFS_OK;
+ if (prevChunkId > 0) {
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
+ buffer, &oldTags);
-}
+ yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
-/* yaffs_DeleteFile deletes the whole file data
- * and the inode associated with the file.
- * It does not delete the links associated with the file.
- */
-static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
-{
+ memcpy(oldName, oh->name, sizeof(oh->name));
+ memset(buffer, 0xFF, sizeof(yaffs_ObjectHeader));
+ } else
+ memset(buffer, 0xFF, dev->nDataBytesPerChunk);
- int retVal;
- int immediateDeletion = 0;
+ oh->type = in->variantType;
+ oh->yst_mode = in->yst_mode;
+ oh->shadowsObject = oh->inbandShadowsObject = shadows;
-#ifdef __KERNEL__
- if (!in->myInode)
- immediateDeletion = 1;
+#ifdef CONFIG_YAFFS_WINCE
+ oh->win_atime[0] = in->win_atime[0];
+ oh->win_ctime[0] = in->win_ctime[0];
+ oh->win_mtime[0] = in->win_mtime[0];
+ oh->win_atime[1] = in->win_atime[1];
+ oh->win_ctime[1] = in->win_ctime[1];
+ oh->win_mtime[1] = in->win_mtime[1];
#else
- if (in->inUse <= 0)
- immediateDeletion = 1;
+ oh->yst_uid = in->yst_uid;
+ oh->yst_gid = in->yst_gid;
+ oh->yst_atime = in->yst_atime;
+ oh->yst_mtime = in->yst_mtime;
+ oh->yst_ctime = in->yst_ctime;
+ oh->yst_rdev = in->yst_rdev;
#endif
+ if (in->parent)
+ oh->parentObjectId = in->parent->objectId;
+ else
+ oh->parentObjectId = 0;
- if (immediateDeletion) {
- retVal =
- yaffs_ChangeObjectName(in, in->myDev->deletedDir,
- _Y("deleted"), 0, 0);
- T(YAFFS_TRACE_TRACING,
- (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
- in->objectId));
- in->deleted = 1;
- in->myDev->nDeletedFiles++;
- if (1 || in->myDev->isYaffs2)
- yaffs_ResizeFile(in, 0);
- yaffs_SoftDeleteFile(in);
- } else {
- retVal =
- yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
- _Y("unlinked"), 0, 0);
- }
+ if (name && *name) {
+ memset(oh->name, 0, sizeof(oh->name));
+ yaffs_LoadObjectHeaderFromName(dev,oh->name,name);
+ } else if (prevChunkId > 0)
+ memcpy(oh->name, oldName, sizeof(oh->name));
+ else
+ memset(oh->name, 0, sizeof(oh->name));
+ oh->isShrink = isShrink;
- return retVal;
-}
+ switch (in->variantType) {
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ /* Should not happen */
+ break;
+ case YAFFS_OBJECT_TYPE_FILE:
+ oh->fileSize =
+ (oh->parentObjectId == YAFFS_OBJECTID_DELETED
+ || oh->parentObjectId ==
+ YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
+ fileVariant.fileSize;
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ oh->equivalentObjectId =
+ in->variant.hardLinkVariant.equivalentObjectId;
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ alias = in->variant.symLinkVariant.alias;
+ if(!alias)
+ alias = _Y("no alias");
+ yaffs_strncpy(oh->alias,
+ alias,
+ YAFFS_MAX_ALIAS_LENGTH);
+ oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
+ break;
+ }
-int yaffs_DeleteFile(yaffs_Object *in)
-{
- int retVal = YAFFS_OK;
- int deleted = in->deleted;
+ /* process any xattrib modifications */
+ if(xmod)
+ yaffs_ApplyXMod(in, (char *)buffer, xmod);
- yaffs_ResizeFile(in, 0);
- if (in->nDataChunks > 0) {
- /* Use soft deletion if there is data in the file.
- * That won't be the case if it has been resized to zero.
- */
- if (!in->unlinked)
- retVal = yaffs_UnlinkFileIfNeeded(in);
+ /* Tags */
+ yaffs_InitialiseTags(&newTags);
+ in->serial++;
+ newTags.chunkId = 0;
+ newTags.objectId = in->objectId;
+ newTags.serialNumber = in->serial;
- if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
- in->deleted = 1;
- deleted = 1;
- in->myDev->nDeletedFiles++;
- yaffs_SoftDeleteFile(in);
- }
- return deleted ? YAFFS_OK : YAFFS_FAIL;
- } else {
- /* The file has no data chunks so we toss it immediately */
- yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
- in->variant.fileVariant.top = NULL;
- yaffs_DoGenericObjectDeletion(in);
+ /* Add extra info for file header */
- return YAFFS_OK;
- }
-}
+ newTags.extraHeaderInfoAvailable = 1;
+ newTags.extraParentObjectId = oh->parentObjectId;
+ newTags.extraFileLength = oh->fileSize;
+ newTags.extraIsShrinkHeader = oh->isShrink;
+ newTags.extraEquivalentObjectId = oh->equivalentObjectId;
+ newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
+ newTags.extraObjectType = in->variantType;
-static int yaffs_DeleteDirectory(yaffs_Object *in)
-{
- /* First check that the directory is empty. */
- if (ylist_empty(&in->variant.directoryVariant.children))
- return yaffs_DoGenericObjectDeletion(in);
+ yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
- return YAFFS_FAIL;
+ /* Create new chunk in NAND */
+ newChunkId =
+ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
+ (prevChunkId > 0) ? 1 : 0);
-}
+ if (newChunkId >= 0) {
-static int yaffs_DeleteSymLink(yaffs_Object *in)
-{
- YFREE(in->variant.symLinkVariant.alias);
+ in->hdrChunk = newChunkId;
- return yaffs_DoGenericObjectDeletion(in);
-}
+ if (prevChunkId > 0) {
+ yaffs_DeleteChunk(dev, prevChunkId, 1,
+ __LINE__);
+ }
-static int yaffs_DeleteHardLink(yaffs_Object *in)
-{
- /* remove this hardlink from the list assocaited with the equivalent
- * object
- */
- ylist_del_init(&in->hardLinks);
- return yaffs_DoGenericObjectDeletion(in);
-}
+ if (!yaffs_ObjectHasCachedWriteData(in))
+ in->dirty = 0;
+
+ /* If this was a shrink, then mark the block that the chunk lives on */
+ if (isShrink) {
+ bi = yaffs_GetBlockInfo(in->myDev,
+ newChunkId / in->myDev->param.nChunksPerBlock);
+ bi->hasShrinkHeader = 1;
+ }
+
+ }
+
+ retVal = newChunkId;
-int yaffs_DeleteObject(yaffs_Object *obj)
-{
-int retVal = -1;
- switch (obj->variantType) {
- case YAFFS_OBJECT_TYPE_FILE:
- retVal = yaffs_DeleteFile(obj);
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- return yaffs_DeleteDirectory(obj);
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- retVal = yaffs_DeleteSymLink(obj);
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- retVal = yaffs_DeleteHardLink(obj);
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- retVal = yaffs_DoGenericObjectDeletion(obj);
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- retVal = 0;
- break; /* should not happen. */
}
+ if (buffer)
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+
return retVal;
}
-static int yaffs_UnlinkWorker(yaffs_Object *obj)
+/*------------------------ Short Operations Cache ----------------------------------------
+ * In many situations where there is no high level buffering (eg WinCE) a lot of
+ * reads might be short sequential reads, and a lot of writes may be short
+ * sequential writes. eg. scanning/writing a jpeg file.
+ * In these cases, a short read/write cache can provide a huge perfomance benefit
+ * with dumb-as-a-rock code.
+ * In Linux, the page cache provides read buffering aand the short op cache provides write
+ * buffering.
+ *
+ * There are a limited number (~10) of cache chunks per device so that we don't
+ * need a very intelligent search.
+ */
+
+static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
{
+ yaffs_Device *dev = obj->myDev;
+ int i;
+ yaffs_ChunkCache *cache;
+ int nCaches = obj->myDev->param.nShortOpCaches;
- int immediateDeletion = 0;
+ for (i = 0; i < nCaches; i++) {
+ cache = &dev->srCache[i];
+ if (cache->object == obj &&
+ cache->dirty)
+ return 1;
+ }
-#ifdef __KERNEL__
- if (!obj->myInode)
- immediateDeletion = 1;
-#else
- if (obj->inUse <= 0)
- immediateDeletion = 1;
-#endif
+ return 0;
+}
- if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
- return yaffs_DeleteHardLink(obj);
- } else if (!ylist_empty(&obj->hardLinks)) {
- /* Curve ball: We're unlinking an object that has a hardlink.
- *
- * This problem arises because we are not strictly following
- * The Linux link/inode model.
- *
- * We can't really delete the object.
- * Instead, we do the following:
- * - Select a hardlink.
- * - Unhook it from the hard links
- * - Unhook it from its parent directory (so that the rename can work)
- * - Rename the object to the hardlink's name.
- * - Delete the hardlink
- */
- yaffs_Object *hl;
- int retVal;
- YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
+static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
+{
+ yaffs_Device *dev = obj->myDev;
+ int lowest = -99; /* Stop compiler whining. */
+ int i;
+ yaffs_ChunkCache *cache;
+ int chunkWritten = 0;
+ int nCaches = obj->myDev->param.nShortOpCaches;
- hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
+ if (nCaches > 0) {
+ do {
+ cache = NULL;
- ylist_del_init(&hl->hardLinks);
- ylist_del_init(&hl->siblings);
+ /* Find the dirty cache for this object with the lowest chunk id. */
+ for (i = 0; i < nCaches; i++) {
+ if (dev->srCache[i].object == obj &&
+ dev->srCache[i].dirty) {
+ if (!cache
+ || dev->srCache[i].chunkId <
+ lowest) {
+ cache = &dev->srCache[i];
+ lowest = cache->chunkId;
+ }
+ }
+ }
- yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
+ if (cache && !cache->locked) {
+ /* Write it out and free it up */
- retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
+ chunkWritten =
+ yaffs_WriteChunkDataToObject(cache->object,
+ cache->chunkId,
+ cache->data,
+ cache->nBytes,
+ 1);
+ cache->dirty = 0;
+ cache->object = NULL;
+ }
- if (retVal == YAFFS_OK)
- retVal = yaffs_DoGenericObjectDeletion(hl);
+ } while (cache && chunkWritten > 0);
- return retVal;
+ if (cache) {
+ /* Hoosterman, disk full while writing cache out. */
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
- } else if (immediateDeletion) {
- switch (obj->variantType) {
- case YAFFS_OBJECT_TYPE_FILE:
- return yaffs_DeleteFile(obj);
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- return yaffs_DeleteDirectory(obj);
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- return yaffs_DeleteSymLink(obj);
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- return yaffs_DoGenericObjectDeletion(obj);
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- default:
- return YAFFS_FAIL;
}
- } else
- return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
- _Y("unlinked"), 0, 0);
+ }
+
}
+/*yaffs_FlushEntireDeviceCache(dev)
+ *
+ *
+ */
-static int yaffs_UnlinkObject(yaffs_Object *obj)
+void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
{
+ yaffs_Object *obj;
+ int nCaches = dev->param.nShortOpCaches;
+ int i;
- if (obj && obj->unlinkAllowed)
- return yaffs_UnlinkWorker(obj);
+ /* Find a dirty object in the cache and flush it...
+ * until there are no further dirty objects.
+ */
+ do {
+ obj = NULL;
+ for (i = 0; i < nCaches && !obj; i++) {
+ if (dev->srCache[i].object &&
+ dev->srCache[i].dirty)
+ obj = dev->srCache[i].object;
- return YAFFS_FAIL;
+ }
+ if (obj)
+ yaffs_FlushFilesChunkCache(obj);
+
+ } while (obj);
}
-int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
+
+
+/* Grab us a cache chunk for use.
+ * First look for an empty one.
+ * Then look for the least recently used non-dirty one.
+ * Then look for the least recently used dirty one...., flush and look again.
+ */
+static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
{
- yaffs_Object *obj;
+ int i;
- obj = yaffs_FindObjectByName(dir, name);
- return yaffs_UnlinkObject(obj);
-}
+ if (dev->param.nShortOpCaches > 0) {
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
+ if (!dev->srCache[i].object)
+ return &dev->srCache[i];
+ }
+ }
-/*----------------------- Initialisation Scanning ---------------------- */
+ return NULL;
+}
-static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
- int backwardScanning)
+static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
{
- yaffs_Object *obj;
+ yaffs_ChunkCache *cache;
+ yaffs_Object *theObj;
+ int usage;
+ int i;
+ int pushout;
- if (!backwardScanning) {
- /* Handle YAFFS1 forward scanning case
- * For YAFFS1 we always do the deletion
- */
+ if (dev->param.nShortOpCaches > 0) {
+ /* Try find a non-dirty one... */
- } else {
- /* Handle YAFFS2 case (backward scanning)
- * If the shadowed object exists then ignore.
- */
- if (yaffs_FindObjectByNumber(dev, objId))
- return;
- }
+ cache = yaffs_GrabChunkCacheWorker(dev);
- /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
- * We put it in unlinked dir to be cleaned up after the scanning
- */
- obj =
- yaffs_FindOrCreateObjectByNumber(dev, objId,
- YAFFS_OBJECT_TYPE_FILE);
- if (!obj)
- return;
- yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
- obj->variant.fileVariant.shrinkSize = 0;
- obj->valid = 1; /* So that we don't read any other info for this file */
+ if (!cache) {
+ /* They were all dirty, find the last recently used object and flush
+ * its cache, then find again.
+ * NB what's here is not very accurate, we actually flush the object
+ * the last recently used page.
+ */
-}
+ /* With locking we can't assume we can use entry zero */
-typedef struct {
- int seq;
- int block;
-} yaffs_BlockIndex;
+ theObj = NULL;
+ usage = -1;
+ cache = NULL;
+ pushout = -1;
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
+ if (dev->srCache[i].object &&
+ !dev->srCache[i].locked &&
+ (dev->srCache[i].lastUse < usage || !cache)) {
+ usage = dev->srCache[i].lastUse;
+ theObj = dev->srCache[i].object;
+ cache = &dev->srCache[i];
+ pushout = i;
+ }
+ }
-static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
-{
- yaffs_Object *hl;
- yaffs_Object *in;
+ if (!cache || cache->dirty) {
+ /* Flush and try again */
+ yaffs_FlushFilesChunkCache(theObj);
+ cache = yaffs_GrabChunkCacheWorker(dev);
+ }
- while (hardList) {
- hl = hardList;
- hardList = (yaffs_Object *) (hardList->hardLinks.next);
+ }
+ return cache;
+ } else
+ return NULL;
- in = yaffs_FindObjectByNumber(dev,
- hl->variant.hardLinkVariant.
- equivalentObjectId);
+}
- if (in) {
- /* Add the hardlink pointers */
- hl->variant.hardLinkVariant.equivalentObject = in;
- ylist_add(&hl->hardLinks, &in->hardLinks);
- } else {
- /* Todo Need to report/handle this better.
- * Got a problem... hardlink to a non-existant object
- */
- hl->variant.hardLinkVariant.equivalentObject = NULL;
- YINIT_LIST_HEAD(&hl->hardLinks);
+/* Find a cached chunk */
+static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
+ int chunkId)
+{
+ yaffs_Device *dev = obj->myDev;
+ int i;
+ if (dev->param.nShortOpCaches > 0) {
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
+ if (dev->srCache[i].object == obj &&
+ dev->srCache[i].chunkId == chunkId) {
+ dev->cacheHits++;
+ return &dev->srCache[i];
+ }
}
}
+ return NULL;
}
+/* Mark the chunk for the least recently used algorithym */
+static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
+ int isAWrite)
+{
+
+ if (dev->param.nShortOpCaches > 0) {
+ if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
+ /* Reset the cache usages */
+ int i;
+ for (i = 1; i < dev->param.nShortOpCaches; i++)
+ dev->srCache[i].lastUse = 0;
+ dev->srLastUse = 0;
+ }
+ dev->srLastUse++;
+ cache->lastUse = dev->srLastUse;
-static int ybicmp(const void *a, const void *b)
-{
- register int aseq = ((yaffs_BlockIndex *)a)->seq;
- register int bseq = ((yaffs_BlockIndex *)b)->seq;
- register int ablock = ((yaffs_BlockIndex *)a)->block;
- register int bblock = ((yaffs_BlockIndex *)b)->block;
- if (aseq == bseq)
- return ablock - bblock;
- else
- return aseq - bseq;
+ if (isAWrite)
+ cache->dirty = 1;
+ }
}
+/* Invalidate a single cache page.
+ * Do this when a whole page gets written,
+ * ie the short cache for this page is no longer valid.
+ */
+static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
+{
+ if (object->myDev->param.nShortOpCaches > 0) {
+ yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
-struct yaffs_ShadowFixerStruct {
- int objectId;
- int shadowedId;
- struct yaffs_ShadowFixerStruct *next;
-};
-
+ if (cache)
+ cache->object = NULL;
+ }
+}
-static void yaffs_StripDeletedObjects(yaffs_Device *dev)
+/* Invalidate all the cache pages associated with this object
+ * Do this whenever ther file is deleted or resized.
+ */
+static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
{
- /*
- * Sort out state of unlinked and deleted objects after scanning.
- */
- struct ylist_head *i;
- struct ylist_head *n;
- yaffs_Object *l;
+ int i;
+ yaffs_Device *dev = in->myDev;
- /* Soft delete all the unlinked files */
- ylist_for_each_safe(i, n,
- &dev->unlinkedDir->variant.directoryVariant.children) {
- if (i) {
- l = ylist_entry(i, yaffs_Object, siblings);
- yaffs_DeleteObject(l);
+ if (dev->param.nShortOpCaches > 0) {
+ /* Invalidate it. */
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
+ if (dev->srCache[i].object == in)
+ dev->srCache[i].object = NULL;
}
}
+}
- ylist_for_each_safe(i, n,
- &dev->deletedDir->variant.directoryVariant.children) {
- if (i) {
- l = ylist_entry(i, yaffs_Object, siblings);
- yaffs_DeleteObject(l);
- }
- }
-}
+/*--------------------- File read/write ------------------------
+ * Read and write have very similar structures.
+ * In general the read/write has three parts to it
+ * An incomplete chunk to start with (if the read/write is not chunk-aligned)
+ * Some complete chunks
+ * An incomplete chunk to end off with
+ *
+ * Curve-balls: the first chunk might also be the last chunk.
+ */
-static int yaffs_Scan(yaffs_Device *dev)
+int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
+ int nBytes)
{
- yaffs_ExtendedTags tags;
- int blk;
- int blockIterator;
- int startIterator;
- int endIterator;
- int result;
int chunk;
- int c;
- int deleted;
- yaffs_BlockState state;
- yaffs_Object *hardList = NULL;
- yaffs_BlockInfo *bi;
- __u32 sequenceNumber;
- yaffs_ObjectHeader *oh;
- yaffs_Object *in;
- yaffs_Object *parent;
-
- int alloc_failed = 0;
+ __u32 start;
+ int nToCopy;
+ int n = nBytes;
+ int nDone = 0;
+ yaffs_ChunkCache *cache;
- struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
+ yaffs_Device *dev;
+ dev = in->myDev;
- __u8 *chunkData;
+ while (n > 0) {
+ /* chunk = offset / dev->nDataBytesPerChunk + 1; */
+ /* start = offset % dev->nDataBytesPerChunk; */
+ yaffs_AddrToChunk(dev, offset, &chunk, &start);
+ chunk++;
+ /* OK now check for the curveball where the start and end are in
+ * the same chunk.
+ */
+ if ((start + n) < dev->nDataBytesPerChunk)
+ nToCopy = n;
+ else
+ nToCopy = dev->nDataBytesPerChunk - start;
+ cache = yaffs_FindChunkCache(in, chunk);
- T(YAFFS_TRACE_SCAN,
- (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
- dev->internalStartBlock, dev->internalEndBlock));
-
- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
-
- dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
-
- /* Scan all the blocks to determine their state */
- for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
- bi = yaffs_GetBlockInfo(dev, blk);
- yaffs_ClearChunkBits(dev, blk);
- bi->pagesInUse = 0;
- bi->softDeletions = 0;
+ /* If the chunk is already in the cache or it is less than a whole chunk
+ * or we're using inband tags then use the cache (if there is caching)
+ * else bypass the cache.
+ */
+ if (cache || nToCopy != dev->nDataBytesPerChunk || dev->param.inbandTags) {
+ if (dev->param.nShortOpCaches > 0) {
- yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
+ /* If we can't find the data in the cache, then load it up. */
- bi->blockState = state;
- bi->sequenceNumber = sequenceNumber;
+ if (!cache) {
+ cache = yaffs_GrabChunkCache(in->myDev);
+ cache->object = in;
+ cache->chunkId = chunk;
+ cache->dirty = 0;
+ cache->locked = 0;
+ yaffs_ReadChunkDataFromObject(in, chunk,
+ cache->
+ data);
+ cache->nBytes = 0;
+ }
- if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
- bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
+ yaffs_UseChunkCache(dev, cache, 0);
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
- state, sequenceNumber));
+ cache->locked = 1;
- if (state == YAFFS_BLOCK_STATE_DEAD) {
- T(YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("block %d is bad" TENDSTR), blk));
- } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block empty " TENDSTR)));
- dev->nErasedBlocks++;
- dev->nFreeChunks += dev->nChunksPerBlock;
- }
- }
- startIterator = dev->internalStartBlock;
- endIterator = dev->internalEndBlock;
+ memcpy(buffer, &cache->data[start], nToCopy);
- /* For each block.... */
- for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
- blockIterator++) {
+ cache->locked = 0;
+ } else {
+ /* Read into the local buffer then copy..*/
- YYIELD();
+ __u8 *localBuffer =
+ yaffs_GetTempBuffer(dev, __LINE__);
+ yaffs_ReadChunkDataFromObject(in, chunk,
+ localBuffer);
- YYIELD();
+ memcpy(buffer, &localBuffer[start], nToCopy);
- blk = blockIterator;
- bi = yaffs_GetBlockInfo(dev, blk);
- state = bi->blockState;
+ yaffs_ReleaseTempBuffer(dev, localBuffer,
+ __LINE__);
+ }
- deleted = 0;
+ } else {
- /* For each chunk in each block that needs scanning....*/
- for (c = 0; !alloc_failed && c < dev->nChunksPerBlock &&
- state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
- /* Read the tags and decide what to do */
- chunk = blk * dev->nChunksPerBlock + c;
+ /* A full chunk. Read directly into the supplied buffer. */
+ yaffs_ReadChunkDataFromObject(in, chunk, buffer);
- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
- &tags);
+ }
- /* Let's have a good look at this chunk... */
+ n -= nToCopy;
+ offset += nToCopy;
+ buffer += nToCopy;
+ nDone += nToCopy;
- if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
- /* YAFFS1 only...
- * A deleted chunk
- */
- deleted++;
- dev->nFreeChunks++;
- /*T((" %d %d deleted\n",blk,c)); */
- } else if (!tags.chunkUsed) {
- /* An unassigned chunk in the block
- * This means that either the block is empty or
- * this is the one being allocated from
- */
+ }
- if (c == 0) {
- /* We're looking at the first chunk in the block so the block is unused */
- state = YAFFS_BLOCK_STATE_EMPTY;
- dev->nErasedBlocks++;
- } else {
- /* this is the block being allocated from */
- T(YAFFS_TRACE_SCAN,
- (TSTR
- (" Allocating from %d %d" TENDSTR),
- blk, c));
- state = YAFFS_BLOCK_STATE_ALLOCATING;
- dev->allocationBlock = blk;
- dev->allocationPage = c;
- dev->allocationBlockFinder = blk;
- /* Set it to here to encourage the allocator to go forth from here. */
+ return nDone;
+}
- }
+int yaffs_DoWriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
+ int nBytes, int writeThrough)
+{
- dev->nFreeChunks += (dev->nChunksPerBlock - c);
- } else if (tags.chunkId > 0) {
- /* chunkId > 0 so it is a data chunk... */
- unsigned int endpos;
-
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
-
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.
- objectId,
- YAFFS_OBJECT_TYPE_FILE);
- /* PutChunkIntoFile checks for a clash (two data chunks with
- * the same chunkId).
- */
+ int chunk;
+ __u32 start;
+ int nToCopy;
+ int n = nBytes;
+ int nDone = 0;
+ int nToWriteBack;
+ int startOfWrite = offset;
+ int chunkWritten = 0;
+ __u32 nBytesRead;
+ __u32 chunkStart;
- if (!in)
- alloc_failed = 1;
+ yaffs_Device *dev;
- if (in) {
- if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
- alloc_failed = 1;
- }
+ dev = in->myDev;
- endpos =
- (tags.chunkId - 1) * dev->nDataBytesPerChunk +
- tags.byteCount;
- if (in &&
- in->variantType == YAFFS_OBJECT_TYPE_FILE
- && in->variant.fileVariant.scannedFileSize <
- endpos) {
- in->variant.fileVariant.
- scannedFileSize = endpos;
- if (!dev->useHeaderFileSize) {
- in->variant.fileVariant.
- fileSize =
- in->variant.fileVariant.
- scannedFileSize;
- }
+ while (n > 0 && chunkWritten >= 0) {
+ yaffs_AddrToChunk(dev, offset, &chunk, &start);
- }
- /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
- } else {
- /* chunkId == 0, so it is an ObjectHeader.
- * Thus, we read in the object header and make the object
- */
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
+ if (chunk * dev->nDataBytesPerChunk + start != offset ||
+ start >= dev->nDataBytesPerChunk) {
+ T(YAFFS_TRACE_ERROR, (
+ TSTR("AddrToChunk of offset %d gives chunk %d start %d"
+ TENDSTR),
+ (int)offset, chunk, start));
+ }
+ chunk++; /* File pos to chunk in file offset */
- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
- chunkData,
- NULL);
-
- oh = (yaffs_ObjectHeader *) chunkData;
-
- in = yaffs_FindObjectByNumber(dev,
- tags.objectId);
- if (in && in->variantType != oh->type) {
- /* This should not happen, but somehow
- * Wev'e ended up with an objectId that has been reused but not yet
- * deleted, and worse still it has changed type. Delete the old object.
- */
+ /* OK now check for the curveball where the start and end are in
+ * the same chunk.
+ */
- yaffs_DeleteObject(in);
+ if ((start + n) < dev->nDataBytesPerChunk) {
+ nToCopy = n;
- in = 0;
- }
+ /* Now folks, to calculate how many bytes to write back....
+ * If we're overwriting and not writing to then end of file then
+ * we need to write back as much as was there before.
+ */
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.
- objectId,
- oh->type);
-
- if (!in)
- alloc_failed = 1;
-
- if (in && oh->shadowsObject > 0) {
-
- struct yaffs_ShadowFixerStruct *fixer;
- fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
- if (fixer) {
- fixer->next = shadowFixerList;
- shadowFixerList = fixer;
- fixer->objectId = tags.objectId;
- fixer->shadowedId = oh->shadowsObject;
- }
+ chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
- }
+ if (chunkStart > in->variant.fileVariant.fileSize)
+ nBytesRead = 0; /* Past end of file */
+ else
+ nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
- if (in && in->valid) {
- /* We have already filled this one. We have a duplicate and need to resolve it. */
+ if (nBytesRead > dev->nDataBytesPerChunk)
+ nBytesRead = dev->nDataBytesPerChunk;
- unsigned existingSerial = in->serial;
- unsigned newSerial = tags.serialNumber;
+ nToWriteBack =
+ (nBytesRead >
+ (start + n)) ? nBytesRead : (start + n);
- if (((existingSerial + 1) & 3) == newSerial) {
- /* Use new one - destroy the exisiting one */
- yaffs_DeleteChunk(dev,
- in->hdrChunk,
- 1, __LINE__);
- in->valid = 0;
- } else {
- /* Use existing - destroy this one. */
- yaffs_DeleteChunk(dev, chunk, 1,
- __LINE__);
- }
- }
+ if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
+ YBUG();
- if (in && !in->valid &&
- (tags.objectId == YAFFS_OBJECTID_ROOT ||
- tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
- /* We only load some info, don't fiddle with directory structure */
- in->valid = 1;
- in->variantType = oh->type;
+ } else {
+ nToCopy = dev->nDataBytesPerChunk - start;
+ nToWriteBack = dev->nDataBytesPerChunk;
+ }
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
-#endif
- in->hdrChunk = chunk;
- in->serial = tags.serialNumber;
+ if (nToCopy != dev->nDataBytesPerChunk || dev->param.inbandTags) {
+ /* An incomplete start or end chunk (or maybe both start and end chunk),
+ * or we're using inband tags, so we want to use the cache buffers.
+ */
+ if (dev->param.nShortOpCaches > 0) {
+ yaffs_ChunkCache *cache;
+ /* If we can't find the data in the cache, then load the cache */
+ cache = yaffs_FindChunkCache(in, chunk);
- } else if (in && !in->valid) {
- /* we need to load this info */
+ if (!cache
+ && yaffs_CheckSpaceForAllocation(dev, 1)) {
+ cache = yaffs_GrabChunkCache(dev);
+ cache->object = in;
+ cache->chunkId = chunk;
+ cache->dirty = 0;
+ cache->locked = 0;
+ yaffs_ReadChunkDataFromObject(in, chunk,
+ cache->data);
+ } else if (cache &&
+ !cache->dirty &&
+ !yaffs_CheckSpaceForAllocation(dev, 1)) {
+ /* Drop the cache if it was a read cache item and
+ * no space check has been made for it.
+ */
+ cache = NULL;
+ }
- in->valid = 1;
- in->variantType = oh->type;
+ if (cache) {
+ yaffs_UseChunkCache(dev, cache, 1);
+ cache->locked = 1;
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
-#endif
- in->hdrChunk = chunk;
- in->serial = tags.serialNumber;
- yaffs_SetObjectName(in, oh->name);
- in->dirty = 0;
+ memcpy(&cache->data[start], buffer,
+ nToCopy);
- /* directory stuff...
- * hook up to parent
- */
- parent =
- yaffs_FindOrCreateObjectByNumber
- (dev, oh->parentObjectId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
- if (!parent)
- alloc_failed = 1;
- if (parent && parent->variantType ==
- YAFFS_OBJECT_TYPE_UNKNOWN) {
- /* Set up as a directory */
- parent->variantType =
- YAFFS_OBJECT_TYPE_DIRECTORY;
- YINIT_LIST_HEAD(&parent->variant.
- directoryVariant.
- children);
- } else if (!parent || parent->variantType !=
- YAFFS_OBJECT_TYPE_DIRECTORY) {
- /* Hoosterman, another problem....
- * We're trying to use a non-directory as a directory
- */
+ cache->locked = 0;
+ cache->nBytes = nToWriteBack;
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
- TENDSTR)));
- parent = dev->lostNFoundDir;
+ if (writeThrough) {
+ chunkWritten =
+ yaffs_WriteChunkDataToObject
+ (cache->object,
+ cache->chunkId,
+ cache->data, cache->nBytes,
+ 1);
+ cache->dirty = 0;
}
- yaffs_AddObjectToDirectory(parent, in);
+ } else {
+ chunkWritten = -1; /* fail the write */
+ }
+ } else {
+ /* An incomplete start or end chunk (or maybe both start and end chunk)
+ * Read into the local buffer then copy, then copy over and write back.
+ */
- if (0 && (parent == dev->deletedDir ||
- parent == dev->unlinkedDir)) {
- in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
- dev->nDeletedFiles++;
- }
- /* Note re hardlinks.
- * Since we might scan a hardlink before its equivalent object is scanned
- * we put them all in a list.
- * After scanning is complete, we should have all the objects, so we run through this
- * list and fix up all the chains.
- */
+ __u8 *localBuffer =
+ yaffs_GetTempBuffer(dev, __LINE__);
- switch (in->variantType) {
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* Todo got a problem */
- break;
- case YAFFS_OBJECT_TYPE_FILE:
- if (dev->useHeaderFileSize)
-
- in->variant.fileVariant.
- fileSize =
- oh->fileSize;
-
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- in->variant.hardLinkVariant.
- equivalentObjectId =
- oh->equivalentObjectId;
- in->hardLinks.next =
- (struct ylist_head *)
- hardList;
- hardList = in;
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- in->variant.symLinkVariant.alias =
- yaffs_CloneString(oh->alias);
- if (!in->variant.symLinkVariant.alias)
- alloc_failed = 1;
- break;
- }
+ yaffs_ReadChunkDataFromObject(in, chunk,
+ localBuffer);
-/*
- if (parent == dev->deletedDir) {
- yaffs_DestroyObject(in);
- bi->hasShrinkHeader = 1;
- }
-*/
- }
- }
- }
- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- /* If we got this far while scanning, then the block is fully allocated.*/
- state = YAFFS_BLOCK_STATE_FULL;
- }
- bi->blockState = state;
+ memcpy(&localBuffer[start], buffer, nToCopy);
- /* Now let's see if it was dirty */
- if (bi->pagesInUse == 0 &&
- !bi->hasShrinkHeader &&
- bi->blockState == YAFFS_BLOCK_STATE_FULL) {
- yaffs_BlockBecameDirty(dev, blk);
- }
+ chunkWritten =
+ yaffs_WriteChunkDataToObject(in, chunk,
+ localBuffer,
+ nToWriteBack,
+ 0);
- }
+ yaffs_ReleaseTempBuffer(dev, localBuffer,
+ __LINE__);
+ }
- /* Ok, we've done all the scanning.
- * Fix up the hard link chains.
- * We should now have scanned all the objects, now it's time to add these
- * hardlinks.
- */
+ } else {
+ /* A full chunk. Write directly from the supplied buffer. */
- yaffs_HardlinkFixup(dev, hardList);
- /* Fix up any shadowed objects */
- {
- struct yaffs_ShadowFixerStruct *fixer;
- yaffs_Object *obj;
-
- while (shadowFixerList) {
- fixer = shadowFixerList;
- shadowFixerList = fixer->next;
- /* Complete the rename transaction by deleting the shadowed object
- * then setting the object header to unshadowed.
- */
- obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
- if (obj)
- yaffs_DeleteObject(obj);
- obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
+ chunkWritten =
+ yaffs_WriteChunkDataToObject(in, chunk, buffer,
+ dev->nDataBytesPerChunk,
+ 0);
- if (obj)
- yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
+ /* Since we've overwritten the cached data, we better invalidate it. */
+ yaffs_InvalidateChunkCache(in, chunk);
+ }
- YFREE(fixer);
+ if (chunkWritten >= 0) {
+ n -= nToCopy;
+ offset += nToCopy;
+ buffer += nToCopy;
+ nDone += nToCopy;
}
- }
- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+ }
- if (alloc_failed)
- return YAFFS_FAIL;
+ /* Update file object */
- T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
+ if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
+ in->variant.fileVariant.fileSize = (startOfWrite + nDone);
+ in->dirty = 1;
- return YAFFS_OK;
+ return nDone;
}
-static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
+int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
+ int nBytes, int writeThrough)
{
- __u8 *chunkData;
- yaffs_ObjectHeader *oh;
- yaffs_Device *dev;
- yaffs_ExtendedTags tags;
- int result;
- int alloc_failed = 0;
+ yaffs2_HandleHole(in,offset);
+ return yaffs_DoWriteDataToFile(in,buffer,offset,nBytes,writeThrough);
+}
- if (!in)
- return;
- dev = in->myDev;
-#if 0
- T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
- in->objectId,
- in->lazyLoaded ? "not yet" : "already"));
-#endif
+/* ---------------------- File resizing stuff ------------------ */
- if (in->lazyLoaded && in->hdrChunk > 0) {
- in->lazyLoaded = 0;
- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
+{
- result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
- oh = (yaffs_ObjectHeader *) chunkData;
+ yaffs_Device *dev = in->myDev;
+ int oldFileSize = in->variant.fileVariant.fileSize;
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
+ int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
-#endif
- yaffs_SetObjectName(in, oh->name);
+ int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
+ dev->nDataBytesPerChunk;
+ int i;
+ int chunkId;
- if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
- in->variant.symLinkVariant.alias =
- yaffs_CloneString(oh->alias);
- if (!in->variant.symLinkVariant.alias)
- alloc_failed = 1; /* Not returned to caller */
- }
+ /* Delete backwards so that we don't end up with holes if
+ * power is lost part-way through the operation.
+ */
+ for (i = lastDel; i >= startDel; i--) {
+ /* NB this could be optimised somewhat,
+ * eg. could retrieve the tags and write them without
+ * using yaffs_DeleteChunk
+ */
- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+ chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
+ if (chunkId > 0) {
+ if (chunkId <
+ (dev->internalStartBlock * dev->param.nChunksPerBlock)
+ || chunkId >=
+ ((dev->internalEndBlock +
+ 1) * dev->param.nChunksPerBlock)) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("Found daft chunkId %d for %d" TENDSTR),
+ chunkId, i));
+ } else {
+ in->nDataChunks--;
+ yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
+ }
+ }
}
+
}
-static int yaffs_ScanBackwards(yaffs_Device *dev)
+
+void yaffs_ResizeDown( yaffs_Object *obj, loff_t newSize)
{
- yaffs_ExtendedTags tags;
- int blk;
- int blockIterator;
- int startIterator;
- int endIterator;
- int nBlocksToScan = 0;
+ int newFullChunks;
+ __u32 newSizeOfPartialChunk;
+ yaffs_Device *dev = obj->myDev;
- int chunk;
- int result;
- int c;
- int deleted;
- yaffs_BlockState state;
- yaffs_Object *hardList = NULL;
- yaffs_BlockInfo *bi;
- __u32 sequenceNumber;
- yaffs_ObjectHeader *oh;
- yaffs_Object *in;
- yaffs_Object *parent;
- int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
- int itsUnlinked;
- __u8 *chunkData;
+ yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
- int fileSize;
- int isShrink;
- int foundChunksInBlock;
- int equivalentObjectId;
- int alloc_failed = 0;
+ yaffs_PruneResizedChunks(obj, newSize);
+ if (newSizeOfPartialChunk != 0) {
+ int lastChunk = 1 + newFullChunks;
+ __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
- yaffs_BlockIndex *blockIndex = NULL;
- int altBlockIndex = 0;
+ /* Got to read and rewrite the last chunk with its new size and zero pad */
+ yaffs_ReadChunkDataFromObject(obj, lastChunk, localBuffer);
+ memset(localBuffer + newSizeOfPartialChunk, 0,
+ dev->nDataBytesPerChunk - newSizeOfPartialChunk);
- if (!dev->isYaffs2) {
- T(YAFFS_TRACE_SCAN,
- (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
- return YAFFS_FAIL;
+ yaffs_WriteChunkDataToObject(obj, lastChunk, localBuffer,
+ newSizeOfPartialChunk, 1);
+
+ yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
}
- T(YAFFS_TRACE_SCAN,
- (TSTR
- ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
- TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
+ obj->variant.fileVariant.fileSize = newSize;
+
+ yaffs_PruneFileStructure(dev, &obj->variant.fileVariant);
+}
- dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
+int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
+{
+ yaffs_Device *dev = in->myDev;
+ int oldFileSize = in->variant.fileVariant.fileSize;
- blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
+ yaffs_FlushFilesChunkCache(in);
+ yaffs_InvalidateWholeChunkCache(in);
- if (!blockIndex) {
- blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
- altBlockIndex = 1;
- }
+ yaffs_CheckGarbageCollection(dev,0);
- if (!blockIndex) {
- T(YAFFS_TRACE_SCAN,
- (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
+ if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
return YAFFS_FAIL;
- }
- dev->blocksInCheckpoint = 0;
+ if (newSize == oldFileSize)
+ return YAFFS_OK;
+
+ if(newSize > oldFileSize){
+ yaffs2_HandleHole(in,newSize);
+ in->variant.fileVariant.fileSize = newSize;
+ } else {
+ /* newSize < oldFileSize */
+ yaffs_ResizeDown(in, newSize);
+ }
+
+ /* Write a new object header to reflect the resize.
+ * show we've shrunk the file, if need be
+ * Do this only if the file is not in the deleted directories
+ * and is not shadowed.
+ */
+ if (in->parent &&
+ !in->isShadowed &&
+ in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
+ in->parent->objectId != YAFFS_OBJECTID_DELETED)
+ yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0, NULL);
+
- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+ return YAFFS_OK;
+}
- /* Scan all the blocks to determine their state */
- for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
- bi = yaffs_GetBlockInfo(dev, blk);
- yaffs_ClearChunkBits(dev, blk);
- bi->pagesInUse = 0;
- bi->softDeletions = 0;
+loff_t yaffs_GetFileSize(yaffs_Object *obj)
+{
+ YCHAR *alias = NULL;
+ obj = yaffs_GetEquivalentObject(obj);
+
+ switch (obj->variantType) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ return obj->variant.fileVariant.fileSize;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ alias = obj->variant.symLinkVariant.alias;
+ if(!alias)
+ return 0;
+ return yaffs_strnlen(alias,YAFFS_MAX_ALIAS_LENGTH);
+ default:
+ return 0;
+ }
+}
- yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
- bi->blockState = state;
- bi->sequenceNumber = sequenceNumber;
- if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
- bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
- if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
- bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
+int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync)
+{
+ int retVal;
+ if (in->dirty) {
+ yaffs_FlushFilesChunkCache(in);
+ if(dataSync) /* Only sync data */
+ retVal=YAFFS_OK;
+ else {
+ if (updateTime) {
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_WinFileTimeNow(in->win_mtime);
+#else
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
- state, sequenceNumber));
+ in->yst_mtime = Y_CURRENT_TIME;
+#endif
+ }
- if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
- dev->blocksInCheckpoint++;
+ retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0, NULL) >=
+ 0) ? YAFFS_OK : YAFFS_FAIL;
+ }
+ } else {
+ retVal = YAFFS_OK;
+ }
- } else if (state == YAFFS_BLOCK_STATE_DEAD) {
- T(YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("block %d is bad" TENDSTR), blk));
- } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block empty " TENDSTR)));
- dev->nErasedBlocks++;
- dev->nFreeChunks += dev->nChunksPerBlock;
- } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+ return retVal;
- /* Determine the highest sequence number */
- if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
- sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
+}
- blockIndex[nBlocksToScan].seq = sequenceNumber;
- blockIndex[nBlocksToScan].block = blk;
+static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
+{
- nBlocksToScan++;
+ /* First off, invalidate the file's data in the cache, without flushing. */
+ yaffs_InvalidateWholeChunkCache(in);
- if (sequenceNumber >= dev->sequenceNumber)
- dev->sequenceNumber = sequenceNumber;
- } else {
- /* TODO: Nasty sequence number! */
- T(YAFFS_TRACE_SCAN,
- (TSTR
- ("Block scanning block %d has bad sequence number %d"
- TENDSTR), blk, sequenceNumber));
+ if (in->myDev->param.isYaffs2 && (in->parent != in->myDev->deletedDir)) {
+ /* Move to the unlinked directory so we have a record that it was deleted. */
+ yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
- }
- }
}
- T(YAFFS_TRACE_SCAN,
- (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
+ yaffs_RemoveObjectFromDirectory(in);
+ yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
+ in->hdrChunk = 0;
+ yaffs_FreeObject(in);
+ return YAFFS_OK;
+}
- YYIELD();
+/* yaffs_DeleteFile deletes the whole file data
+ * and the inode associated with the file.
+ * It does not delete the links associated with the file.
+ */
+static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
+{
- /* Sort the blocks */
-#ifndef CONFIG_YAFFS_USE_OWN_SORT
- {
- /* Use qsort now. */
- yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
- }
-#else
- {
- /* Dungy old bubble sort... */
+ int retVal;
+ int immediateDeletion = 0;
+ yaffs_Device *dev = in->myDev;
- yaffs_BlockIndex temp;
- int i;
- int j;
+ if (!in->myInode)
+ immediateDeletion = 1;
- for (i = 0; i < nBlocksToScan; i++)
- for (j = i + 1; j < nBlocksToScan; j++)
- if (blockIndex[i].seq > blockIndex[j].seq) {
- temp = blockIndex[j];
- blockIndex[j] = blockIndex[i];
- blockIndex[i] = temp;
- }
+ if (immediateDeletion) {
+ retVal =
+ yaffs_ChangeObjectName(in, in->myDev->deletedDir,
+ _Y("deleted"), 0, 0);
+ T(YAFFS_TRACE_TRACING,
+ (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
+ in->objectId));
+ in->deleted = 1;
+ in->myDev->nDeletedFiles++;
+ if (dev->param.disableSoftDelete || dev->param.isYaffs2)
+ yaffs_ResizeFile(in, 0);
+ yaffs_SoftDeleteFile(in);
+ } else {
+ retVal =
+ yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
+ _Y("unlinked"), 0, 0);
}
-#endif
- YYIELD();
- T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
+ return retVal;
+}
+
+int yaffs_DeleteFile(yaffs_Object *in)
+{
+ int retVal = YAFFS_OK;
+ int deleted; /* Need to cache value on stack if in is freed */
+ yaffs_Device *dev = in->myDev;
+
+ if (dev->param.disableSoftDelete || dev->param.isYaffs2)
+ yaffs_ResizeFile(in, 0);
+
+ if (in->nDataChunks > 0) {
+ /* Use soft deletion if there is data in the file.
+ * That won't be the case if it has been resized to zero.
+ */
+ if (!in->unlinked)
+ retVal = yaffs_UnlinkFileIfNeeded(in);
- /* Now scan the blocks looking at the data. */
- startIterator = 0;
- endIterator = nBlocksToScan - 1;
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
+ deleted = in->deleted;
- /* For each block.... backwards */
- for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
- blockIterator--) {
- /* Cooperative multitasking! This loop can run for so
- long that watchdog timers expire. */
- YYIELD();
+ if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
+ in->deleted = 1;
+ deleted = 1;
+ in->myDev->nDeletedFiles++;
+ yaffs_SoftDeleteFile(in);
+ }
+ return deleted ? YAFFS_OK : YAFFS_FAIL;
+ } else {
+ /* The file has no data chunks so we toss it immediately */
+ yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
+ in->variant.fileVariant.top = NULL;
+ yaffs_DoGenericObjectDeletion(in);
- /* get the block to scan in the correct order */
- blk = blockIndex[blockIterator].block;
+ return YAFFS_OK;
+ }
+}
- bi = yaffs_GetBlockInfo(dev, blk);
+static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj)
+{
+ return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) &&
+ !(ylist_empty(&obj->variant.directoryVariant.children));
+}
+static int yaffs_DeleteDirectory(yaffs_Object *obj)
+{
+ /* First check that the directory is empty. */
+ if (yaffs_IsNonEmptyDirectory(obj))
+ return YAFFS_FAIL;
- state = bi->blockState;
+ return yaffs_DoGenericObjectDeletion(obj);
+}
- deleted = 0;
+static int yaffs_DeleteSymLink(yaffs_Object *in)
+{
+ if(in->variant.symLinkVariant.alias)
+ YFREE(in->variant.symLinkVariant.alias);
+ in->variant.symLinkVariant.alias=NULL;
- /* For each chunk in each block that needs scanning.... */
- foundChunksInBlock = 0;
- for (c = dev->nChunksPerBlock - 1;
- !alloc_failed && c >= 0 &&
- (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
- state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
- /* Scan backwards...
- * Read the tags and decide what to do
- */
+ return yaffs_DoGenericObjectDeletion(in);
+}
- chunk = blk * dev->nChunksPerBlock + c;
+static int yaffs_DeleteHardLink(yaffs_Object *in)
+{
+ /* remove this hardlink from the list assocaited with the equivalent
+ * object
+ */
+ ylist_del_init(&in->hardLinks);
+ return yaffs_DoGenericObjectDeletion(in);
+}
- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
- &tags);
+int yaffs_DeleteObject(yaffs_Object *obj)
+{
+int retVal = -1;
+ switch (obj->variantType) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ retVal = yaffs_DeleteFile(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ if(!ylist_empty(&obj->variant.directoryVariant.dirty)){
+ T(YAFFS_TRACE_BACKGROUND, (TSTR("Remove object %d from dirty directories" TENDSTR),obj->objectId));
+ ylist_del_init(&obj->variant.directoryVariant.dirty);
+ }
+ return yaffs_DeleteDirectory(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ retVal = yaffs_DeleteSymLink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ retVal = yaffs_DeleteHardLink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ retVal = yaffs_DoGenericObjectDeletion(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ retVal = 0;
+ break; /* should not happen. */
+ }
- /* Let's have a good look at this chunk... */
+ return retVal;
+}
- if (!tags.chunkUsed) {
- /* An unassigned chunk in the block.
- * If there are used chunks after this one, then
- * it is a chunk that was skipped due to failing the erased
- * check. Just skip it so that it can be deleted.
- * But, more typically, We get here when this is an unallocated
- * chunk and his means that either the block is empty or
- * this is the one being allocated from
- */
+static int yaffs_UnlinkWorker(yaffs_Object *obj)
+{
- if (foundChunksInBlock) {
- /* This is a chunk that was skipped due to failing the erased check */
- } else if (c == 0) {
- /* We're looking at the first chunk in the block so the block is unused */
- state = YAFFS_BLOCK_STATE_EMPTY;
- dev->nErasedBlocks++;
- } else {
- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
- state == YAFFS_BLOCK_STATE_ALLOCATING) {
- if (dev->sequenceNumber == bi->sequenceNumber) {
- /* this is the block being allocated from */
-
- T(YAFFS_TRACE_SCAN,
- (TSTR
- (" Allocating from %d %d"
- TENDSTR), blk, c));
-
- state = YAFFS_BLOCK_STATE_ALLOCATING;
- dev->allocationBlock = blk;
- dev->allocationPage = c;
- dev->allocationBlockFinder = blk;
- } else {
- /* This is a partially written block that is not
- * the current allocation block. This block must have
- * had a write failure, so set up for retirement.
- */
-
- /* bi->needsRetiring = 1; ??? TODO */
- bi->gcPrioritise = 1;
-
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("Partially written block %d detected" TENDSTR),
- blk));
- }
- }
- }
+ int immediateDeletion = 0;
- dev->nFreeChunks++;
+ if (!obj->myInode)
+ immediateDeletion = 1;
- } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
- T(YAFFS_TRACE_SCAN,
- (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
- blk, c));
-
- dev->nFreeChunks++;
-
- } else if (tags.chunkId > 0) {
- /* chunkId > 0 so it is a data chunk... */
- unsigned int endpos;
- __u32 chunkBase =
- (tags.chunkId - 1) * dev->nDataBytesPerChunk;
-
- foundChunksInBlock = 1;
-
-
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
-
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.
- objectId,
- YAFFS_OBJECT_TYPE_FILE);
- if (!in) {
- /* Out of memory */
- alloc_failed = 1;
- }
+ if(obj)
+ yaffs_UpdateParent(obj->parent);
- if (in &&
- in->variantType == YAFFS_OBJECT_TYPE_FILE
- && chunkBase <
- in->variant.fileVariant.shrinkSize) {
- /* This has not been invalidated by a resize */
- if (!yaffs_PutChunkIntoFile(in, tags.chunkId,
- chunk, -1)) {
- alloc_failed = 1;
- }
+ if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
+ return yaffs_DeleteHardLink(obj);
+ } else if (!ylist_empty(&obj->hardLinks)) {
+ /* Curve ball: We're unlinking an object that has a hardlink.
+ *
+ * This problem arises because we are not strictly following
+ * The Linux link/inode model.
+ *
+ * We can't really delete the object.
+ * Instead, we do the following:
+ * - Select a hardlink.
+ * - Unhook it from the hard links
+ * - Move it from its parent directory (so that the rename can work)
+ * - Rename the object to the hardlink's name.
+ * - Delete the hardlink
+ */
- /* File size is calculated by looking at the data chunks if we have not
- * seen an object header yet. Stop this practice once we find an object header.
- */
- endpos =
- (tags.chunkId -
- 1) * dev->nDataBytesPerChunk +
- tags.byteCount;
-
- if (!in->valid && /* have not got an object header yet */
- in->variant.fileVariant.
- scannedFileSize < endpos) {
- in->variant.fileVariant.
- scannedFileSize = endpos;
- in->variant.fileVariant.
- fileSize =
- in->variant.fileVariant.
- scannedFileSize;
- }
+ yaffs_Object *hl;
+ yaffs_Object *parent;
+ int retVal;
+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
- } else if (in) {
- /* This chunk has been invalidated by a resize, so delete */
- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+ hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
- }
- } else {
- /* chunkId == 0, so it is an ObjectHeader.
- * Thus, we read in the object header and make the object
- */
- foundChunksInBlock = 1;
+ yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
+ parent = hl->parent;
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
+ ylist_del_init(&hl->hardLinks);
- oh = NULL;
- in = NULL;
+ yaffs_AddObjectToDirectory(obj->myDev->unlinkedDir, hl);
- if (tags.extraHeaderInfoAvailable) {
- in = yaffs_FindOrCreateObjectByNumber
- (dev, tags.objectId,
- tags.extraObjectType);
- if (!in)
- alloc_failed = 1;
- }
+ retVal = yaffs_ChangeObjectName(obj,parent, name, 0, 0);
- if (!in ||
-#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
- !in->valid ||
-#endif
- tags.extraShadows ||
- (!in->valid &&
- (tags.objectId == YAFFS_OBJECTID_ROOT ||
- tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
-
- /* If we don't have valid info then we need to read the chunk
- * TODO In future we can probably defer reading the chunk and
- * living with invalid data until needed.
- */
+ if (retVal == YAFFS_OK)
+ retVal = yaffs_DoGenericObjectDeletion(hl);
- result = yaffs_ReadChunkWithTagsFromNAND(dev,
- chunk,
- chunkData,
- NULL);
-
- oh = (yaffs_ObjectHeader *) chunkData;
-
- if (dev->inbandTags) {
- /* Fix up the header if they got corrupted by inband tags */
- oh->shadowsObject = oh->inbandShadowsObject;
- oh->isShrink = oh->inbandIsShrink;
- }
+ return retVal;
- if (!in) {
- in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
- if (!in)
- alloc_failed = 1;
- }
+ } else if (immediateDeletion) {
+ switch (obj->variantType) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ return yaffs_DeleteFile(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ ylist_del_init(&obj->variant.directoryVariant.dirty);
+ return yaffs_DeleteDirectory(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ return yaffs_DeleteSymLink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ return yaffs_DoGenericObjectDeletion(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ default:
+ return YAFFS_FAIL;
+ }
+ } else if(yaffs_IsNonEmptyDirectory(obj))
+ return YAFFS_FAIL;
+ else
+ return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
+ _Y("unlinked"), 0, 0);
+}
- }
- if (!in) {
- /* TODO Hoosterman we have a problem! */
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
- TENDSTR), tags.objectId, chunk));
- continue;
- }
+static int yaffs_UnlinkObject(yaffs_Object *obj)
+{
- if (in->valid) {
- /* We have already filled this one.
- * We have a duplicate that will be discarded, but
- * we first have to suck out resize info if it is a file.
- */
+ if (obj && obj->unlinkAllowed)
+ return yaffs_UnlinkWorker(obj);
- if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
- ((oh &&
- oh->type == YAFFS_OBJECT_TYPE_FILE) ||
- (tags.extraHeaderInfoAvailable &&
- tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
- __u32 thisSize =
- (oh) ? oh->fileSize : tags.
- extraFileLength;
- __u32 parentObjectId =
- (oh) ? oh->
- parentObjectId : tags.
- extraParentObjectId;
-
-
- isShrink =
- (oh) ? oh->isShrink : tags.
- extraIsShrinkHeader;
+ return YAFFS_FAIL;
- /* If it is deleted (unlinked at start also means deleted)
- * we treat the file size as being zeroed at this point.
- */
- if (parentObjectId ==
- YAFFS_OBJECTID_DELETED
- || parentObjectId ==
- YAFFS_OBJECTID_UNLINKED) {
- thisSize = 0;
- isShrink = 1;
- }
+}
+int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
+{
+ yaffs_Object *obj;
- if (isShrink &&
- in->variant.fileVariant.
- shrinkSize > thisSize) {
- in->variant.fileVariant.
- shrinkSize =
- thisSize;
- }
+ obj = yaffs_FindObjectByName(dir, name);
+ return yaffs_UnlinkObject(obj);
+}
- if (isShrink)
- bi->hasShrinkHeader = 1;
+/*----------------------- Initialisation Scanning ---------------------- */
- }
- /* Use existing - destroy this one. */
- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
+ int backwardScanning)
+{
+ yaffs_Object *obj;
- }
+ if (!backwardScanning) {
+ /* Handle YAFFS1 forward scanning case
+ * For YAFFS1 we always do the deletion
+ */
- if (!in->valid && in->variantType !=
- (oh ? oh->type : tags.extraObjectType))
- T(YAFFS_TRACE_ERROR, (
- TSTR("yaffs tragedy: Bad object type, "
- TCONT("%d != %d, for object %d at chunk ")
- TCONT("%d during scan")
- TENDSTR), oh ?
- oh->type : tags.extraObjectType,
- in->variantType, tags.objectId,
- chunk));
-
- if (!in->valid &&
- (tags.objectId == YAFFS_OBJECTID_ROOT ||
- tags.objectId ==
- YAFFS_OBJECTID_LOSTNFOUND)) {
- /* We only load some info, don't fiddle with directory structure */
- in->valid = 1;
+ } else {
+ /* Handle YAFFS2 case (backward scanning)
+ * If the shadowed object exists then ignore.
+ */
+ obj = yaffs_FindObjectByNumber(dev, objId);
+ if(obj)
+ return;
+ }
- if (oh) {
- in->variantType = oh->type;
+ /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
+ * We put it in unlinked dir to be cleaned up after the scanning
+ */
+ obj =
+ yaffs_FindOrCreateObjectByNumber(dev, objId,
+ YAFFS_OBJECT_TYPE_FILE);
+ if (!obj)
+ return;
+ obj->isShadowed = 1;
+ yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
+ obj->variant.fileVariant.shrinkSize = 0;
+ obj->valid = 1; /* So that we don't read any other info for this file */
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
+}
-#endif
- } else {
- in->variantType = tags.extraObjectType;
- in->lazyLoaded = 1;
- }
- in->hdrChunk = chunk;
+void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
+{
+ yaffs_Object *hl;
+ yaffs_Object *in;
- } else if (!in->valid) {
- /* we need to load this info */
+ while (hardList) {
+ hl = hardList;
+ hardList = (yaffs_Object *) (hardList->hardLinks.next);
- in->valid = 1;
- in->hdrChunk = chunk;
+ in = yaffs_FindObjectByNumber(dev,
+ hl->variant.hardLinkVariant.
+ equivalentObjectId);
- if (oh) {
- in->variantType = oh->type;
+ if (in) {
+ /* Add the hardlink pointers */
+ hl->variant.hardLinkVariant.equivalentObject = in;
+ ylist_add(&hl->hardLinks, &in->hardLinks);
+ } else {
+ /* Todo Need to report/handle this better.
+ * Got a problem... hardlink to a non-existant object
+ */
+ hl->variant.hardLinkVariant.equivalentObject = NULL;
+ YINIT_LIST_HEAD(&hl->hardLinks);
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
-#endif
+ }
+ }
+}
- if (oh->shadowsObject > 0)
- yaffs_HandleShadowedObject(dev,
- oh->
- shadowsObject,
- 1);
-
-
- yaffs_SetObjectName(in, oh->name);
- parent =
- yaffs_FindOrCreateObjectByNumber
- (dev, oh->parentObjectId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
-
- fileSize = oh->fileSize;
- isShrink = oh->isShrink;
- equivalentObjectId = oh->equivalentObjectId;
- } else {
- in->variantType = tags.extraObjectType;
- parent =
- yaffs_FindOrCreateObjectByNumber
- (dev, tags.extraParentObjectId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
- fileSize = tags.extraFileLength;
- isShrink = tags.extraIsShrinkHeader;
- equivalentObjectId = tags.extraEquivalentObjectId;
- in->lazyLoaded = 1;
+static void yaffs_StripDeletedObjects(yaffs_Device *dev)
+{
+ /*
+ * Sort out state of unlinked and deleted objects after scanning.
+ */
+ struct ylist_head *i;
+ struct ylist_head *n;
+ yaffs_Object *l;
- }
- in->dirty = 0;
+ if (dev->readOnly)
+ return;
- if (!parent)
- alloc_failed = 1;
+ /* Soft delete all the unlinked files */
+ ylist_for_each_safe(i, n,
+ &dev->unlinkedDir->variant.directoryVariant.children) {
+ if (i) {
+ l = ylist_entry(i, yaffs_Object, siblings);
+ yaffs_DeleteObject(l);
+ }
+ }
- /* directory stuff...
- * hook up to parent
- */
+ ylist_for_each_safe(i, n,
+ &dev->deletedDir->variant.directoryVariant.children) {
+ if (i) {
+ l = ylist_entry(i, yaffs_Object, siblings);
+ yaffs_DeleteObject(l);
+ }
+ }
- if (parent && parent->variantType ==
- YAFFS_OBJECT_TYPE_UNKNOWN) {
- /* Set up as a directory */
- parent->variantType =
- YAFFS_OBJECT_TYPE_DIRECTORY;
- YINIT_LIST_HEAD(&parent->variant.
- directoryVariant.
- children);
- } else if (!parent || parent->variantType !=
- YAFFS_OBJECT_TYPE_DIRECTORY) {
- /* Hoosterman, another problem....
- * We're trying to use a non-directory as a directory
- */
+}
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
- TENDSTR)));
- parent = dev->lostNFoundDir;
- }
+/*
+ * This code iterates through all the objects making sure that they are rooted.
+ * Any unrooted objects are re-rooted in lost+found.
+ * An object needs to be in one of:
+ * - Directly under deleted, unlinked
+ * - Directly or indirectly under root.
+ *
+ * Note:
+ * This code assumes that we don't ever change the current relationships between
+ * directories:
+ * rootDir->parent == unlinkedDir->parent == deletedDir->parent == NULL
+ * lostNfound->parent == rootDir
+ *
+ * This fixes the problem where directories might have inadvertently been deleted
+ * leaving the object "hanging" without being rooted in the directory tree.
+ */
+
+static int yaffs_HasNULLParent(yaffs_Device *dev, yaffs_Object *obj)
+{
+ return (obj == dev->deletedDir ||
+ obj == dev->unlinkedDir||
+ obj == dev->rootDir);
+}
- yaffs_AddObjectToDirectory(parent, in);
+static void yaffs_FixHangingObjects(yaffs_Device *dev)
+{
+ yaffs_Object *obj;
+ yaffs_Object *parent;
+ int i;
+ struct ylist_head *lh;
+ struct ylist_head *n;
+ int depthLimit;
+ int hanging;
- itsUnlinked = (parent == dev->deletedDir) ||
- (parent == dev->unlinkedDir);
+ if (dev->readOnly)
+ return;
- if (isShrink) {
- /* Mark the block as having a shrinkHeader */
- bi->hasShrinkHeader = 1;
- }
+ /* Iterate through the objects in each hash entry,
+ * looking at each object.
+ * Make sure it is rooted.
+ */
- /* Note re hardlinks.
- * Since we might scan a hardlink before its equivalent object is scanned
- * we put them all in a list.
- * After scanning is complete, we should have all the objects, so we run
- * through this list and fix up all the chains.
+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+ ylist_for_each_safe(lh, n, &dev->objectBucket[i].list) {
+ if (lh) {
+ obj = ylist_entry(lh, yaffs_Object, hashLink);
+ parent= obj->parent;
+
+ if(yaffs_HasNULLParent(dev,obj)){
+ /* These directories are not hanging */
+ hanging = 0;
+ }
+ else if(!parent || parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ hanging = 1;
+ else if(yaffs_HasNULLParent(dev,parent))
+ hanging = 0;
+ else {
+ /*
+ * Need to follow the parent chain to see if it is hanging.
*/
+ hanging = 0;
+ depthLimit=100;
- switch (in->variantType) {
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* Todo got a problem */
- break;
- case YAFFS_OBJECT_TYPE_FILE:
-
- if (in->variant.fileVariant.
- scannedFileSize < fileSize) {
- /* This covers the case where the file size is greater
- * than where the data is
- * This will happen if the file is resized to be larger
- * than its current data extents.
- */
- in->variant.fileVariant.fileSize = fileSize;
- in->variant.fileVariant.scannedFileSize =
- in->variant.fileVariant.fileSize;
- }
-
- if (isShrink &&
- in->variant.fileVariant.shrinkSize > fileSize) {
- in->variant.fileVariant.shrinkSize = fileSize;
- }
-
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- if (!itsUnlinked) {
- in->variant.hardLinkVariant.equivalentObjectId =
- equivalentObjectId;
- in->hardLinks.next =
- (struct ylist_head *) hardList;
- hardList = in;
- }
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- if (oh) {
- in->variant.symLinkVariant.alias =
- yaffs_CloneString(oh->alias);
- if (!in->variant.symLinkVariant.alias)
- alloc_failed = 1;
- }
- break;
+ while(parent != dev->rootDir &&
+ parent->parent &&
+ parent->parent->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+ depthLimit > 0){
+ parent = parent->parent;
+ depthLimit--;
}
-
+ if(parent != dev->rootDir)
+ hanging = 1;
+ }
+ if(hanging){
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("Hanging object %d moved to lost and found" TENDSTR),
+ obj->objectId));
+ yaffs_AddObjectToDirectory(dev->lostNFoundDir,obj);
}
-
}
+ }
+ }
+}
- } /* End of scanning for each chunk */
- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- /* If we got this far while scanning, then the block is fully allocated. */
- state = YAFFS_BLOCK_STATE_FULL;
- }
+/*
+ * Delete directory contents for cleaning up lost and found.
+ */
+static void yaffs_DeleteDirectoryContents(yaffs_Object *dir)
+{
+ yaffs_Object *obj;
+ struct ylist_head *lh;
+ struct ylist_head *n;
- bi->blockState = state;
+ if(dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
+
+ ylist_for_each_safe(lh, n, &dir->variant.directoryVariant.children) {
+ if (lh) {
+ obj = ylist_entry(lh, yaffs_Object, siblings);
+ if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
+ yaffs_DeleteDirectoryContents(obj);
+
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("Deleting lost_found object %d" TENDSTR),
+ obj->objectId));
- /* Now let's see if it was dirty */
- if (bi->pagesInUse == 0 &&
- !bi->hasShrinkHeader &&
- bi->blockState == YAFFS_BLOCK_STATE_FULL) {
- yaffs_BlockBecameDirty(dev, blk);
+ /* Need to use UnlinkObject since Delete would not handle
+ * hardlinked objects correctly.
+ */
+ yaffs_UnlinkObject(obj);
}
-
}
+
+}
- if (altBlockIndex)
- YFREE_ALT(blockIndex);
- else
- YFREE(blockIndex);
+static void yaffs_EmptyLostAndFound(yaffs_Device *dev)
+{
+ yaffs_DeleteDirectoryContents(dev->lostNFoundDir);
+}
- /* Ok, we've done all the scanning.
- * Fix up the hard link chains.
- * We should now have scanned all the objects, now it's time to add these
- * hardlinks.
- */
- yaffs_HardlinkFixup(dev, hardList);
+static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
+{
+ __u8 *chunkData;
+ yaffs_ObjectHeader *oh;
+ yaffs_Device *dev;
+ yaffs_ExtendedTags tags;
+ int result;
+ int alloc_failed = 0;
+ if (!in)
+ return;
- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+ dev = in->myDev;
- if (alloc_failed)
- return YAFFS_FAIL;
+#if 0
+ T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
+ in->objectId,
+ in->lazyLoaded ? "not yet" : "already"));
+#endif
- T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
+ if (in->lazyLoaded && in->hdrChunk > 0) {
+ in->lazyLoaded = 0;
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
- return YAFFS_OK;
-}
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
+ oh = (yaffs_ObjectHeader *) chunkData;
-/*------------------------------ Directory Functions ----------------------------- */
+ in->yst_mode = oh->yst_mode;
+#ifdef CONFIG_YAFFS_WINCE
+ in->win_atime[0] = oh->win_atime[0];
+ in->win_ctime[0] = oh->win_ctime[0];
+ in->win_mtime[0] = oh->win_mtime[0];
+ in->win_atime[1] = oh->win_atime[1];
+ in->win_ctime[1] = oh->win_ctime[1];
+ in->win_mtime[1] = oh->win_mtime[1];
+#else
+ in->yst_uid = oh->yst_uid;
+ in->yst_gid = oh->yst_gid;
+ in->yst_atime = oh->yst_atime;
+ in->yst_mtime = oh->yst_mtime;
+ in->yst_ctime = oh->yst_ctime;
+ in->yst_rdev = oh->yst_rdev;
-static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
-{
- struct ylist_head *lh;
- yaffs_Object *listObj;
+#endif
+ yaffs_SetObjectNameFromOH(in, oh);
- int count = 0;
+ if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
+ in->variant.symLinkVariant.alias =
+ yaffs_CloneString(oh->alias);
+ if (!in->variant.symLinkVariant.alias)
+ alloc_failed = 1; /* Not returned to caller */
+ }
- if (!obj) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
- YBUG();
- return;
+ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
}
+}
- if (yaffs_SkipVerification(obj->myDev))
- return;
+/*------------------------------ Directory Functions ----------------------------- */
- if (!obj->parent) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
- YBUG();
+/*
+ *yaffs_UpdateParent() handles fixing a directories mtime and ctime when a new
+ * link (ie. name) is created or deleted in the directory.
+ *
+ * ie.
+ * create dir/a : update dir's mtime/ctime
+ * rm dir/a: update dir's mtime/ctime
+ * modify dir/a: don't update dir's mtimme/ctime
+ *
+ * This can be handled immediately or defered. Defering helps reduce the number
+ * of updates when many files in a directory are changed within a brief period.
+ *
+ * If the directory updating is defered then yaffs_UpdateDirtyDirecories must be
+ * called periodically.
+ */
+
+static void yaffs_UpdateParent(yaffs_Object *obj)
+{
+ yaffs_Device *dev;
+ if(!obj)
return;
- }
-
- if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
- YBUG();
- }
-
- /* Iterate through the objects in each hash entry */
+#ifndef CONFIG_YAFFS_WINCE
- ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
- if (lh) {
- listObj = ylist_entry(lh, yaffs_Object, siblings);
- yaffs_VerifyObject(listObj);
- if (obj == listObj)
- count++;
+ dev = obj->myDev;
+ obj->dirty = 1;
+ obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME;
+ if(dev->param.deferDirectoryUpdate){
+ struct ylist_head *link = &obj->variant.directoryVariant.dirty;
+
+ if(ylist_empty(link)){
+ ylist_add(link,&dev->dirtyDirectories);
+ T(YAFFS_TRACE_BACKGROUND, (TSTR("Added object %d to dirty directories" TENDSTR),obj->objectId));
}
- }
- if (count != 1) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
- YBUG();
- }
+ } else
+ yaffs_UpdateObjectHeader(obj, NULL, 0, 0, 0, NULL);
+#endif
}
-static void yaffs_VerifyDirectory(yaffs_Object *directory)
+void yaffs_UpdateDirtyDirectories(yaffs_Device *dev)
{
- struct ylist_head *lh;
- yaffs_Object *listObj;
-
- if (!directory) {
- YBUG();
- return;
- }
+ struct ylist_head *link;
+ yaffs_Object *obj;
+ yaffs_DirectoryStructure *dS;
+ yaffs_ObjectVariant *oV;
- if (yaffs_SkipFullVerification(directory->myDev))
- return;
+ T(YAFFS_TRACE_BACKGROUND, (TSTR("Update dirty directories" TENDSTR)));
- if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
- YBUG();
- }
+ while(!ylist_empty(&dev->dirtyDirectories)){
+ link = dev->dirtyDirectories.next;
+ ylist_del_init(link);
+
+ dS=ylist_entry(link,yaffs_DirectoryStructure,dirty);
+ oV = ylist_entry(dS,yaffs_ObjectVariant,directoryVariant);
+ obj = ylist_entry(oV,yaffs_Object,variant);
- /* Iterate through the objects in each hash entry */
+ T(YAFFS_TRACE_BACKGROUND, (TSTR("Update directory %d" TENDSTR), obj->objectId));
- ylist_for_each(lh, &directory->variant.directoryVariant.children) {
- if (lh) {
- listObj = ylist_entry(lh, yaffs_Object, siblings);
- if (listObj->parent != directory) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
- YBUG();
- }
- yaffs_VerifyObjectInDirectory(listObj);
- }
+ if(obj->dirty)
+ yaffs_UpdateObjectHeader(obj, NULL, 0, 0, 0, NULL);
}
}
-
static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
{
yaffs_Device *dev = obj->myDev;
@@ -6677,18 +4474,17 @@ static void yaffs_RemoveObjectFromDirect
yaffs_VerifyDirectory(parent);
- if (dev && dev->removeObjectCallback)
- dev->removeObjectCallback(obj);
+ if (dev && dev->param.removeObjectCallback)
+ dev->param.removeObjectCallback(obj);
ylist_del_init(&obj->siblings);
obj->parent = NULL;
-
+
yaffs_VerifyDirectory(parent);
}
-
-static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
+void yaffs_AddObjectToDirectory(yaffs_Object *directory,
yaffs_Object *obj)
{
if (!directory) {
@@ -6781,7 +4577,7 @@ yaffs_Object *yaffs_FindObjectByName(yaf
* Do a real check
*/
yaffs_GetObjectName(l, buffer,
- YAFFS_MAX_NAME_LENGTH);
+ YAFFS_MAX_NAME_LENGTH + 1);
if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
return l;
}
@@ -6842,36 +4638,124 @@ yaffs_Object *yaffs_GetEquivalentObject(
return obj;
}
-int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize)
-{
- memset(name, 0, buffSize * sizeof(YCHAR));
-
- yaffs_CheckObjectDetailsLoaded(obj);
+/*
+ * A note or two on object names.
+ * * If the object name is missing, we then make one up in the form objnnn
+ *
+ * * ASCII names are stored in the object header's name field from byte zero
+ * * Unicode names are historically stored starting from byte zero.
+ *
+ * Then there are automatic Unicode names...
+ * The purpose of these is to save names in a way that can be read as
+ * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII
+ * system to share files.
+ *
+ * These automatic unicode are stored slightly differently...
+ * - If the name can fit in the ASCII character space then they are saved as
+ * ascii names as per above.
+ * - If the name needs Unicode then the name is saved in Unicode
+ * starting at oh->name[1].
- if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
- yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
- } else if (obj->hdrChunk <= 0) {
+ */
+static void yaffs_FixNullName(yaffs_Object * obj,YCHAR * name, int buffSize)
+{
+ /* Create an object name if we could not find one. */
+ if(yaffs_strnlen(name,YAFFS_MAX_NAME_LENGTH) == 0){
YCHAR locName[20];
YCHAR numString[20];
YCHAR *x = &numString[19];
unsigned v = obj->objectId;
numString[19] = 0;
- while (v > 0) {
+ while(v>0){
x--;
*x = '0' + (v % 10);
v /= 10;
}
/* make up a name */
yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
- yaffs_strcat(locName, x);
+ yaffs_strcat(locName,x);
yaffs_strncpy(name, locName, buffSize - 1);
+ }
+}
+
+static void yaffs_LoadNameFromObjectHeader(yaffs_Device *dev,YCHAR *name, const YCHAR *ohName, int bufferSize)
+{
+#ifdef CONFIG_YAFFS_AUTO_UNICODE
+ if(dev->param.autoUnicode){
+ if(*ohName){
+ /* It is an ASCII name, so do an ASCII to unicode conversion */
+ const char *asciiOhName = (const char *)ohName;
+ int n = bufferSize - 1;
+ while(n > 0 && *asciiOhName){
+ *name = *asciiOhName;
+ name++;
+ asciiOhName++;
+ n--;
+ }
+ } else
+ yaffs_strncpy(name,ohName+1, bufferSize -1);
+ } else
+#endif
+ yaffs_strncpy(name, ohName, bufferSize - 1);
+}
+
+
+static void yaffs_LoadObjectHeaderFromName(yaffs_Device *dev, YCHAR *ohName, const YCHAR *name)
+{
+#ifdef CONFIG_YAFFS_AUTO_UNICODE
+
+ int isAscii;
+ YCHAR *w;
+ if(dev->param.autoUnicode){
+
+ isAscii = 1;
+ w = name;
+
+ /* Figure out if the name will fit in ascii character set */
+ while(isAscii && *w){
+ if((*w) & 0xff00)
+ isAscii = 0;
+ w++;
+ }
+
+ if(isAscii){
+ /* It is an ASCII name, so do a unicode to ascii conversion */
+ char *asciiOhName = (char *)ohName;
+ int n = YAFFS_MAX_NAME_LENGTH - 1;
+ while(n > 0 && *name){
+ *asciiOhName= *name;
+ name++;
+ asciiOhName++;
+ n--;
+ }
+ } else{
+ /* It is a unicode name, so save starting at the second YCHAR */
+ *ohName = 0;
+ yaffs_strncpy(ohName+1,name, YAFFS_MAX_NAME_LENGTH -2);
+ }
}
+ else
+#endif
+ yaffs_strncpy(ohName,name, YAFFS_MAX_NAME_LENGTH - 1);
+
+}
+
+int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize)
+{
+ memset(name, 0, buffSize * sizeof(YCHAR));
+
+ yaffs_CheckObjectDetailsLoaded(obj);
+
+ if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
+ yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
+ }
#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
- else if (obj->shortName[0])
+ else if (obj->shortName[0]) {
yaffs_strcpy(name, obj->shortName);
+ }
#endif
- else {
+ else if(obj->hdrChunk > 0) {
int result;
__u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
@@ -6884,14 +4768,17 @@ int yaffs_GetObjectName(yaffs_Object *ob
obj->hdrChunk, buffer,
NULL);
}
- yaffs_strncpy(name, oh->name, buffSize - 1);
+ yaffs_LoadNameFromObjectHeader(obj->myDev,name,oh->name,buffSize);
yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
}
- return yaffs_strlen(name);
+ yaffs_FixNullName(obj,name,buffSize);
+
+ return yaffs_strnlen(name,YAFFS_MAX_NAME_LENGTH);
}
+
int yaffs_GetObjectFileLength(yaffs_Object *obj)
{
/* Dereference any hard linking */
@@ -6899,9 +4786,11 @@ int yaffs_GetObjectFileLength(yaffs_Obje
if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
return obj->variant.fileVariant.fileSize;
- if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
- return yaffs_strlen(obj->variant.symLinkVariant.alias);
- else {
+ if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK){
+ if(!obj->variant.symLinkVariant.alias)
+ return 0;
+ return yaffs_strnlen(obj->variant.symLinkVariant.alias,YAFFS_MAX_ALIAS_LENGTH);
+ } else {
/* Only a directory should drop through to here */
return obj->myDev->nDataBytesPerChunk;
}
@@ -6992,7 +4881,7 @@ int yaffs_SetAttributes(yaffs_Object *ob
if (valid & ATTR_SIZE)
yaffs_ResizeFile(obj, attr->ia_size);
- yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
+ yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0, NULL);
return YAFFS_OK;
@@ -7025,12 +4914,129 @@ int yaffs_GetAttributes(yaffs_Object *ob
#endif
+
+static int yaffs_DoXMod(yaffs_Object *obj, int set, const YCHAR *name, const void *value, int size, int flags)
+{
+ yaffs_XAttrMod xmod;
+
+ int result;
+
+ xmod.set = set;
+ xmod.name = name;
+ xmod.data = value;
+ xmod.size = size;
+ xmod.flags = flags;
+ xmod.result = -ENOSPC;
+
+ result = yaffs_UpdateObjectHeader(obj, NULL, 0, 0, 0, &xmod);
+
+ if(result > 0)
+ return xmod.result;
+ else
+ return -ENOSPC;
+}
+
+static int yaffs_ApplyXMod(yaffs_Object *obj, char *buffer, yaffs_XAttrMod *xmod)
+{
+ int retval = 0;
+ int x_offs = sizeof(yaffs_ObjectHeader);
+ yaffs_Device *dev = obj->myDev;
+ int x_size = dev->nDataBytesPerChunk - sizeof(yaffs_ObjectHeader);
+
+ char * x_buffer = buffer + x_offs;
+
+ if(xmod->set)
+ retval = nval_set(x_buffer, x_size, xmod->name, xmod->data, xmod->size, xmod->flags);
+ else
+ retval = nval_del(x_buffer, x_size, xmod->name);
+
+ obj->hasXattr = nval_hasvalues(x_buffer, x_size);
+ obj->xattrKnown = 1;
+
+ xmod->result = retval;
+
+ return retval;
+}
+
+static int yaffs_DoXFetch(yaffs_Object *obj, const YCHAR *name, void *value, int size)
+{
+ char *buffer = NULL;
+ int result;
+ yaffs_ExtendedTags tags;
+ yaffs_Device *dev = obj->myDev;
+ int x_offs = sizeof(yaffs_ObjectHeader);
+ int x_size = dev->nDataBytesPerChunk - sizeof(yaffs_ObjectHeader);
+
+ char * x_buffer;
+
+ int retval = 0;
+
+ if(obj->hdrChunk < 1)
+ return -ENODATA;
+
+ /* If we know that the object has no xattribs then don't do all the
+ * reading and parsing.
+ */
+ if(obj->xattrKnown && !obj->hasXattr){
+ if(name)
+ return -ENODATA;
+ else
+ return 0;
+ }
+
+ buffer = (char *) yaffs_GetTempBuffer(dev, __LINE__);
+ if(!buffer)
+ return -ENOMEM;
+
+ result = yaffs_ReadChunkWithTagsFromNAND(dev,obj->hdrChunk, (__u8 *)buffer, &tags);
+
+ if(result != YAFFS_OK)
+ retval = -ENOENT;
+ else{
+ x_buffer = buffer + x_offs;
+
+ if (!obj->xattrKnown){
+ obj->hasXattr = nval_hasvalues(x_buffer, x_size);
+ obj->xattrKnown = 1;
+ }
+
+ if(name)
+ retval = nval_get(x_buffer, x_size, name, value, size);
+ else
+ retval = nval_list(x_buffer, x_size, value,size);
+ }
+ yaffs_ReleaseTempBuffer(dev,(__u8 *)buffer,__LINE__);
+ return retval;
+}
+
+int yaffs_SetXAttribute(yaffs_Object *obj, const YCHAR *name, const void * value, int size, int flags)
+{
+ return yaffs_DoXMod(obj, 1, name, value, size, flags);
+}
+
+int yaffs_RemoveXAttribute(yaffs_Object *obj, const YCHAR *name)
+{
+ return yaffs_DoXMod(obj, 0, name, NULL, 0, 0);
+}
+
+int yaffs_GetXAttribute(yaffs_Object *obj, const YCHAR *name, void *value, int size)
+{
+ return yaffs_DoXFetch(obj, name, value, size);
+}
+
+int yaffs_ListXAttributes(yaffs_Object *obj, char *buffer, int size)
+{
+ return yaffs_DoXFetch(obj, NULL, buffer,size);
+}
+
+
+
#if 0
int yaffs_DumpObject(yaffs_Object *obj)
{
YCHAR name[257];
- yaffs_GetObjectName(obj, name, 256);
+ yaffs_GetObjectName(obj, name, YAFFS_MAX_NAME_LENGTH + 1);
T(YAFFS_TRACE_ALWAYS,
(TSTR
@@ -7050,30 +5056,32 @@ static int yaffs_CheckDevFunctions(const
{
/* Common functions, gotta have */
- if (!dev->eraseBlockInNAND || !dev->initialiseNAND)
+ if (!dev->param.eraseBlockInNAND || !dev->param.initialiseNAND)
return 0;
#ifdef CONFIG_YAFFS_YAFFS2
/* Can use the "with tags" style interface for yaffs1 or yaffs2 */
- if (dev->writeChunkWithTagsToNAND &&
- dev->readChunkWithTagsFromNAND &&
- !dev->writeChunkToNAND &&
- !dev->readChunkFromNAND &&
- dev->markNANDBlockBad && dev->queryNANDBlock)
+ if (dev->param.writeChunkWithTagsToNAND &&
+ dev->param.readChunkWithTagsFromNAND &&
+ !dev->param.writeChunkToNAND &&
+ !dev->param.readChunkFromNAND &&
+ dev->param.markNANDBlockBad &&
+ dev->param.queryNANDBlock)
return 1;
#endif
/* Can use the "spare" style interface for yaffs1 */
- if (!dev->isYaffs2 &&
- !dev->writeChunkWithTagsToNAND &&
- !dev->readChunkWithTagsFromNAND &&
- dev->writeChunkToNAND &&
- dev->readChunkFromNAND &&
- !dev->markNANDBlockBad && !dev->queryNANDBlock)
+ if (!dev->param.isYaffs2 &&
+ !dev->param.writeChunkWithTagsToNAND &&
+ !dev->param.readChunkWithTagsFromNAND &&
+ dev->param.writeChunkToNAND &&
+ dev->param.readChunkFromNAND &&
+ !dev->param.markNANDBlockBad &&
+ !dev->param.queryNANDBlock)
return 1;
- return 0; /* bad */
+ return 0; /* bad */
}
@@ -7120,35 +5128,35 @@ int yaffs_GutsInitialise(yaffs_Device *d
return YAFFS_FAIL;
}
- dev->internalStartBlock = dev->startBlock;
- dev->internalEndBlock = dev->endBlock;
+ dev->internalStartBlock = dev->param.startBlock;
+ dev->internalEndBlock = dev->param.endBlock;
dev->blockOffset = 0;
dev->chunkOffset = 0;
dev->nFreeChunks = 0;
- dev->gcBlock = -1;
+ dev->gcBlock = 0;
- if (dev->startBlock == 0) {
- dev->internalStartBlock = dev->startBlock + 1;
- dev->internalEndBlock = dev->endBlock + 1;
+ if (dev->param.startBlock == 0) {
+ dev->internalStartBlock = dev->param.startBlock + 1;
+ dev->internalEndBlock = dev->param.endBlock + 1;
dev->blockOffset = 1;
- dev->chunkOffset = dev->nChunksPerBlock;
+ dev->chunkOffset = dev->param.nChunksPerBlock;
}
/* Check geometry parameters. */
- if ((!dev->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
- (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
- (dev->inbandTags && !dev->isYaffs2) ||
- dev->nChunksPerBlock < 2 ||
- dev->nReservedBlocks < 2 ||
+ if ((!dev->param.inbandTags && dev->param.isYaffs2 && dev->param.totalBytesPerChunk < 1024) ||
+ (!dev->param.isYaffs2 && dev->param.totalBytesPerChunk < 512) ||
+ (dev->param.inbandTags && !dev->param.isYaffs2) ||
+ dev->param.nChunksPerBlock < 2 ||
+ dev->param.nReservedBlocks < 2 ||
dev->internalStartBlock <= 0 ||
dev->internalEndBlock <= 0 ||
- dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)) { /* otherwise it is too small */
+ dev->internalEndBlock <= (dev->internalStartBlock + dev->param.nReservedBlocks + 2)) { /* otherwise it is too small */
T(YAFFS_TRACE_ALWAYS,
(TSTR
("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
- TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
+ TENDSTR), dev->param.totalBytesPerChunk, dev->param.isYaffs2 ? "2" : "", dev->param.inbandTags));
return YAFFS_FAIL;
}
@@ -7159,10 +5167,10 @@ int yaffs_GutsInitialise(yaffs_Device *d
}
/* Sort out space for inband tags, if required */
- if (dev->inbandTags)
- dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
+ if (dev->param.inbandTags)
+ dev->nDataBytesPerChunk = dev->param.totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
else
- dev->nDataBytesPerChunk = dev->totalBytesPerChunk;
+ dev->nDataBytesPerChunk = dev->param.totalBytesPerChunk;
/* Got the right mix of functions? */
if (!yaffs_CheckDevFunctions(dev)) {
@@ -7209,12 +5217,12 @@ int yaffs_GutsInitialise(yaffs_Device *d
* We need to find the next power of 2 > than internalEndBlock
*/
- x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
+ x = dev->param.nChunksPerBlock * (dev->internalEndBlock + 1);
bits = ShiftsGE(x);
/* Set up tnode width if wide tnodes are enabled. */
- if (!dev->wideTnodesDisabled) {
+ if (!dev->param.wideTnodesDisabled) {
/* bits must be even so that we end up with 32-bit words */
if (bits & 1)
bits++;
@@ -7238,10 +5246,13 @@ int yaffs_GutsInitialise(yaffs_Device *d
else
dev->chunkGroupBits = bits - dev->tnodeWidth;
+ dev->tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+ if(dev->tnodeSize < sizeof(yaffs_Tnode))
+ dev->tnodeSize = sizeof(yaffs_Tnode);
dev->chunkGroupSize = 1 << dev->chunkGroupBits;
- if (dev->nChunksPerBlock < dev->chunkGroupSize) {
+ if (dev->param.nChunksPerBlock < dev->chunkGroupSize) {
/* We have a problem because the soft delete won't work if
* the chunk group size > chunks per block.
* This can be remedied by using larger "virtual blocks".
@@ -7255,9 +5266,11 @@ int yaffs_GutsInitialise(yaffs_Device *d
/* OK, we've finished verifying the device, lets continue with initialisation */
/* More device initialisation */
- dev->garbageCollections = 0;
- dev->passiveGarbageCollections = 0;
- dev->currentDirtyChecker = 0;
+ dev->allGCs = 0;
+ dev->passiveGCs = 0;
+ dev->oldestDirtyGCs = 0;
+ dev->backgroundGCs = 0;
+ dev->gcBlockFinder = 0;
dev->bufferedBlock = -1;
dev->doingBufferedBlockRewrite = 0;
dev->nDeletedFiles = 0;
@@ -7269,8 +5282,11 @@ int yaffs_GutsInitialise(yaffs_Device *d
dev->tagsEccUnfixed = 0;
dev->nErasureFailures = 0;
dev->nErasedBlocks = 0;
- dev->isDoingGC = 0;
+ dev->gcDisable= 0;
dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
+ YINIT_LIST_HEAD(&dev->dirtyDirectories);
+ dev->oldestDirtySequence = 0;
+ dev->oldestDirtyBlock = 0;
/* Initialise temporary buffers and caches. */
if (!yaffs_InitialiseTempBuffers(dev))
@@ -7281,13 +5297,13 @@ int yaffs_GutsInitialise(yaffs_Device *d
if (!init_failed &&
- dev->nShortOpCaches > 0) {
+ dev->param.nShortOpCaches > 0) {
int i;
void *buf;
- int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
+ int srCacheBytes = dev->param.nShortOpCaches * sizeof(yaffs_ChunkCache);
- if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
- dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
+ if (dev->param.nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
+ dev->param.nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
dev->srCache = YMALLOC(srCacheBytes);
@@ -7296,11 +5312,11 @@ int yaffs_GutsInitialise(yaffs_Device *d
if (dev->srCache)
memset(dev->srCache, 0, srCacheBytes);
- for (i = 0; i < dev->nShortOpCaches && buf; i++) {
+ for (i = 0; i < dev->param.nShortOpCaches && buf; i++) {
dev->srCache[i].object = NULL;
dev->srCache[i].lastUse = 0;
dev->srCache[i].dirty = 0;
- dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk);
+ dev->srCache[i].data = buf = YMALLOC_DMA(dev->param.totalBytesPerChunk);
}
if (!buf)
init_failed = 1;
@@ -7311,19 +5327,18 @@ int yaffs_GutsInitialise(yaffs_Device *d
dev->cacheHits = 0;
if (!init_failed) {
- dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
+ dev->gcCleanupList = YMALLOC(dev->param.nChunksPerBlock * sizeof(__u32));
if (!dev->gcCleanupList)
init_failed = 1;
}
- if (dev->isYaffs2)
- dev->useHeaderFileSize = 1;
+ if (dev->param.isYaffs2)
+ dev->param.useHeaderFileSize = 1;
if (!init_failed && !yaffs_InitialiseBlocks(dev))
init_failed = 1;
- yaffs_InitialiseTnodes(dev);
- yaffs_InitialiseObjects(dev);
+ yaffs_InitialiseTnodesAndObjects(dev);
if (!init_failed && !yaffs_CreateInitialDirectories(dev))
init_failed = 1;
@@ -7331,8 +5346,8 @@ int yaffs_GutsInitialise(yaffs_Device *d
if (!init_failed) {
/* Now scan the flash. */
- if (dev->isYaffs2) {
- if (yaffs_CheckpointRestore(dev)) {
+ if (dev->param.isYaffs2) {
+ if (yaffs2_CheckpointRestore(dev)) {
yaffs_CheckObjectDetailsLoaded(dev->rootDir);
T(YAFFS_TRACE_ALWAYS,
(TSTR("yaffs: restored from checkpoint" TENDSTR)));
@@ -7342,9 +5357,8 @@ int yaffs_GutsInitialise(yaffs_Device *d
* and scan backwards.
*/
yaffs_DeinitialiseBlocks(dev);
- yaffs_DeinitialiseTnodes(dev);
- yaffs_DeinitialiseObjects(dev);
+ yaffs_DeinitialiseTnodesAndObjects(dev);
dev->nErasedBlocks = 0;
dev->nFreeChunks = 0;
@@ -7353,24 +5367,25 @@ int yaffs_GutsInitialise(yaffs_Device *d
dev->nDeletedFiles = 0;
dev->nUnlinkedFiles = 0;
dev->nBackgroundDeletions = 0;
- dev->oldestDirtySequence = 0;
if (!init_failed && !yaffs_InitialiseBlocks(dev))
init_failed = 1;
- yaffs_InitialiseTnodes(dev);
- yaffs_InitialiseObjects(dev);
+ yaffs_InitialiseTnodesAndObjects(dev);
if (!init_failed && !yaffs_CreateInitialDirectories(dev))
init_failed = 1;
- if (!init_failed && !yaffs_ScanBackwards(dev))
+ if (!init_failed && !yaffs2_ScanBackwards(dev))
init_failed = 1;
}
- } else if (!yaffs_Scan(dev))
+ } else if (!yaffs1_Scan(dev))
init_failed = 1;
yaffs_StripDeletedObjects(dev);
+ yaffs_FixHangingObjects(dev);
+ if(dev->param.emptyLostAndFound)
+ yaffs_EmptyLostAndFound(dev);
}
if (init_failed) {
@@ -7394,6 +5409,9 @@ int yaffs_GutsInitialise(yaffs_Device *d
yaffs_VerifyFreeChunks(dev);
yaffs_VerifyBlocks(dev);
+ /* Clean up any aborted checkpoint data */
+ if(!dev->isCheckpointed && dev->blocksInCheckpoint > 0)
+ yaffs2_InvalidateCheckpoint(dev);
T(YAFFS_TRACE_TRACING,
(TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
@@ -7407,12 +5425,11 @@ void yaffs_Deinitialise(yaffs_Device *de
int i;
yaffs_DeinitialiseBlocks(dev);
- yaffs_DeinitialiseTnodes(dev);
- yaffs_DeinitialiseObjects(dev);
- if (dev->nShortOpCaches > 0 &&
+ yaffs_DeinitialiseTnodesAndObjects(dev);
+ if (dev->param.nShortOpCaches > 0 &&
dev->srCache) {
- for (i = 0; i < dev->nShortOpCaches; i++) {
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
if (dev->srCache[i].data)
YFREE(dev->srCache[i].data);
dev->srCache[i].data = NULL;
@@ -7429,34 +5446,33 @@ void yaffs_Deinitialise(yaffs_Device *de
dev->isMounted = 0;
- if (dev->deinitialiseNAND)
- dev->deinitialiseNAND(dev);
+ if (dev->param.deinitialiseNAND)
+ dev->param.deinitialiseNAND(dev);
}
}
-static int yaffs_CountFreeChunks(yaffs_Device *dev)
+int yaffs_CountFreeChunks(yaffs_Device *dev)
{
- int nFree;
+ int nFree=0;
int b;
yaffs_BlockInfo *blk;
- for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
- b++) {
- blk = yaffs_GetBlockInfo(dev, b);
-
+ blk = dev->blockInfo;
+ for (b = dev->internalStartBlock; b <= dev->internalEndBlock; b++) {
switch (blk->blockState) {
case YAFFS_BLOCK_STATE_EMPTY:
case YAFFS_BLOCK_STATE_ALLOCATING:
case YAFFS_BLOCK_STATE_COLLECTING:
case YAFFS_BLOCK_STATE_FULL:
nFree +=
- (dev->nChunksPerBlock - blk->pagesInUse +
+ (dev->param.nChunksPerBlock - blk->pagesInUse +
blk->softDeletions);
break;
default:
break;
}
+ blk++;
}
return nFree;
@@ -7481,21 +5497,19 @@ int yaffs_GetNumberOfFreeChunks(yaffs_De
/* Now count the number of dirty chunks in the cache and subtract those */
- for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
+ for (nDirtyCacheChunks = 0, i = 0; i < dev->param.nShortOpCaches; i++) {
if (dev->srCache[i].dirty)
nDirtyCacheChunks++;
}
nFree -= nDirtyCacheChunks;
- nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
+ nFree -= ((dev->param.nReservedBlocks + 1) * dev->param.nChunksPerBlock);
/* Now we figure out how much to reserve for the checkpoint and report that... */
- blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
- if (blocksForCheckpoint < 0)
- blocksForCheckpoint = 0;
+ blocksForCheckpoint = yaffs2_CalcCheckpointBlocksRequired(dev);
- nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
+ nFree -= (blocksForCheckpoint * dev->param.nChunksPerBlock);
if (nFree < 0)
nFree = 0;
@@ -7504,27 +5518,6 @@ int yaffs_GetNumberOfFreeChunks(yaffs_De
}
-static int yaffs_freeVerificationFailures;
-
-static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
-{
- int counted;
- int difference;
-
- if (yaffs_SkipVerification(dev))
- return;
-
- counted = yaffs_CountFreeChunks(dev);
-
- difference = dev->nFreeChunks - counted;
-
- if (difference) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
- dev->nFreeChunks, counted, difference));
- yaffs_freeVerificationFailures++;
- }
-}
/*---------------------------------------- YAFFS test code ----------------------*/
@@ -7532,7 +5525,7 @@ static void yaffs_VerifyFreeChunks(yaffs
do { \
if (sizeof(structure) != syze) { \
T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\
- name, syze, sizeof(structure))); \
+ name, syze, (int) sizeof(structure))); \
return YAFFS_FAIL; \
} \
} while (0)
@@ -7542,9 +5535,8 @@ static int yaffs_CheckStructures(void)
/* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags"); */
/* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion"); */
/* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare"); */
-#ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
- yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode");
-#endif
+/* yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode"); */
+
#ifndef CONFIG_YAFFS_WINCE
yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");
#endif
diff -Nrup a/fs/yaffs2/yaffs_guts.h b/fs/yaffs2/yaffs_guts.h
--- a/fs/yaffs2/yaffs_guts.h 2010-10-03 17:48:22.718000363 +0300
+++ b/fs/yaffs2/yaffs_guts.h 2010-10-03 18:03:47.542000362 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -16,8 +16,9 @@
#ifndef __YAFFS_GUTS_H__
#define __YAFFS_GUTS_H__
-#include "devextras.h"
#include "yportenv.h"
+#include "devextras.h"
+#include "yaffs_list.h"
#define YAFFS_OK 1
#define YAFFS_FAIL 0
@@ -52,7 +53,6 @@
#define YAFFS_MAX_CHUNK_ID 0x000FFFFF
-#define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF
#define YAFFS_ALLOCATION_NOBJECTS 100
#define YAFFS_ALLOCATION_NTNODES 100
@@ -62,8 +62,9 @@
#define YAFFS_OBJECT_SPACE 0x40000
+#define YAFFS_MAX_OBJECT_ID (YAFFS_OBJECT_SPACE -1)
-#define YAFFS_CHECKPOINT_VERSION 3
+#define YAFFS_CHECKPOINT_VERSION 4
#ifdef CONFIG_YAFFS_UNICODE
#define YAFFS_MAX_NAME_LENGTH 127
@@ -81,12 +82,11 @@
#define YAFFS_OBJECTID_UNLINKED 3
#define YAFFS_OBJECTID_DELETED 4
-/* Sseudo object ids for checkpointing */
+/* Pseudo object ids for checkpointing */
#define YAFFS_OBJECTID_SB_HEADER 0x10
#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21
-/* */
#define YAFFS_MAX_SHORT_OP_CACHES 20
@@ -119,11 +119,7 @@ typedef struct {
int dirty;
int nBytes; /* Only valid if the cache is dirty */
int locked; /* Can't push out or flush while locked. */
-#ifdef CONFIG_YAFFS_YAFFS2
__u8 *data;
-#else
- __u8 data[YAFFS_BYTES_PER_CHUNK];
-#endif
} yaffs_ChunkCache;
@@ -234,6 +230,8 @@ typedef enum {
YAFFS_BLOCK_STATE_UNKNOWN = 0,
YAFFS_BLOCK_STATE_SCANNING,
+ /* Being scanned */
+
YAFFS_BLOCK_STATE_NEEDS_SCANNING,
/* The block might have something on it (ie it is allocating or full, perhaps empty)
* but it needs to be scanned to determine its true state.
@@ -249,21 +247,23 @@ typedef enum {
/* This block is partially allocated.
* At least one page holds valid data.
* This is the one currently being used for page
- * allocation. Should never be more than one of these
+ * allocation. Should never be more than one of these.
+ * If a block is only partially allocated at mount it is treated as full.
*/
YAFFS_BLOCK_STATE_FULL,
/* All the pages in this block have been allocated.
+ * If a block was only partially allocated when mounted we treat
+ * it as fully allocated.
*/
YAFFS_BLOCK_STATE_DIRTY,
- /* All pages have been allocated and deleted.
+ /* The block was full and now all chunks have been deleted.
* Erase me, reuse me.
*/
YAFFS_BLOCK_STATE_CHECKPOINT,
- /* This block is assigned to holding checkpoint data.
- */
+ /* This block is assigned to holding checkpoint data. */
YAFFS_BLOCK_STATE_COLLECTING,
/* This block is being garbage collected */
@@ -351,23 +351,12 @@ typedef struct {
/*--------------------------- Tnode -------------------------- */
union yaffs_Tnode_union {
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL + 1];
-#else
union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL];
-#endif
-/* __u16 level0[YAFFS_NTNODES_LEVEL0]; */
};
typedef union yaffs_Tnode_union yaffs_Tnode;
-struct yaffs_TnodeList_struct {
- struct yaffs_TnodeList_struct *next;
- yaffs_Tnode *tnodes;
-};
-
-typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
/*------------------------ Object -----------------------------*/
/* An object can be one of:
@@ -387,6 +376,7 @@ typedef struct {
typedef struct {
struct ylist_head children; /* list of child links */
+ struct ylist_head dirty; /* Entry for list of dirty directories */
} yaffs_DirectoryStructure;
typedef struct {
@@ -405,6 +395,8 @@ typedef union {
yaffs_HardLinkStructure hardLinkVariant;
} yaffs_ObjectVariant;
+
+
struct yaffs_ObjectStruct {
__u8 deleted:1; /* This should only apply to unlinked files. */
__u8 softDeleted:1; /* it has also been soft deleted */
@@ -424,6 +416,10 @@ struct yaffs_ObjectStruct {
* until the inode is released.
*/
__u8 beingCreated:1; /* This object is still being created so skip some checks. */
+ __u8 isShadowed:1; /* This object is shadowed on the way to being renamed. */
+
+ __u8 xattrKnown:1; /* We know if this has object has xattribs or not. */
+ __u8 hasXattr:1; /* This object has xattribs. Valid if xattrKnown. */
__u8 serial; /* serial number of chunk in NAND. Cached here */
__u16 sum; /* sum of the name to speed searching */
@@ -452,10 +448,6 @@ struct yaffs_ObjectStruct {
YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1];
#endif
-#ifndef __KERNEL__
- __u32 inUse;
-#endif
-
#ifdef CONFIG_YAFFS_WINCE
__u32 win_ctime[2];
__u32 win_mtime[2];
@@ -470,10 +462,7 @@ struct yaffs_ObjectStruct {
__u32 yst_rdev;
-#ifdef __KERNEL__
- struct inode *myInode;
-
-#endif
+ void *myInode;
yaffs_ObjectType variantType;
@@ -483,13 +472,6 @@ struct yaffs_ObjectStruct {
typedef struct yaffs_ObjectStruct yaffs_Object;
-struct yaffs_ObjectList_struct {
- yaffs_Object *objects;
- struct yaffs_ObjectList_struct *next;
-};
-
-typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
-
typedef struct {
struct ylist_head list;
int count;
@@ -531,12 +513,18 @@ typedef struct {
/*----------------- Device ---------------------------------*/
-struct yaffs_DeviceStruct {
- struct ylist_head devList;
- const char *name;
- /* Entry parameters set up way early. Yaffs sets up the rest.*/
- int nDataBytesPerChunk; /* Should be a power of 2 >= 512 */
+struct yaffs_DeviceParamStruct {
+ const YCHAR *name;
+
+ /*
+ * Entry parameters set up way early. Yaffs sets up the rest.
+ * The structure should be zeroed out before use so that unused
+ * and defualt values are zero.
+ */
+
+ int inbandTags; /* Use unband tags */
+ __u32 totalBytesPerChunk; /* Should be >= 512, does not need to be a power of 2 */
int nChunksPerBlock; /* does not need to be a power of 2 */
int spareBytesPerChunk; /* spare area size */
int startBlock; /* Start block we're allowed to use */
@@ -545,24 +533,24 @@ struct yaffs_DeviceStruct {
/* reserved blocks on NOR and RAM. */
- /* Stuff used by the shared space checkpointing mechanism */
- /* If this value is zero, then this mechanism is disabled */
-
-/* int nCheckpointReservedBlocks; */ /* Blocks to reserve for checkpoint data */
-
-
int nShortOpCaches; /* If <= 0, then short op caching is disabled, else
- * the number of short op caches (don't use too many)
+ * the number of short op caches (don't use too many).
+ * 10 to 20 is a good bet.
*/
+ int useNANDECC; /* Flag to decide whether or not to use NANDECC on data (yaffs1) */
+ int noTagsECC; /* Flag to decide whether or not to do ECC on packed tags (yaffs2) */
- int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */
+ int isYaffs2; /* Use yaffs2 mode on this device */
- int useNANDECC; /* Flag to decide whether or not to use NANDECC */
+ int emptyLostAndFound; /* Auto-empty lost+found directory on mount */
- void *genericDevice; /* Pointer to device context
- * On an mtd this holds the mtd pointer.
- */
- void *superBlock;
+ int refreshPeriod; /* How often we should check to do a block refresh */
+
+ /* Checkpoint control. Can be set before or after initialisation */
+ __u8 skipCheckpointRead;
+ __u8 skipCheckpointWrite;
+
+ int enableXattr; /* Enable xattribs */
/* NAND access functions (Must be set before calling YAFFS)*/
@@ -589,58 +577,68 @@ struct yaffs_DeviceStruct {
yaffs_BlockState *state, __u32 *sequenceNumber);
#endif
- int isYaffs2;
-
/* The removeObjectCallback function must be supplied by OS flavours that
- * need it. The Linux kernel does not use this, but yaffs direct does use
- * it to implement the faster readdir
+ * need it.
+ * yaffs direct uses it to implement the faster readdir.
+ * Linux uses it to protect the directory during unlocking.
*/
void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj);
- /* Callback to mark the superblock dirsty */
- void (*markSuperBlockDirty)(void *superblock);
+ /* Callback to mark the superblock dirty */
+ void (*markSuperBlockDirty)(struct yaffs_DeviceStruct *dev);
+
+ /* Callback to control garbage collection. */
+ unsigned (*gcControl)(struct yaffs_DeviceStruct *dev);
+ /* Debug control flags. Don't use unless you know what you're doing */
+ int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */
+ int disableLazyLoad; /* Disable lazy loading on this device */
int wideTnodesDisabled; /* Set to disable wide tnodes */
+ int disableSoftDelete; /* yaffs 1 only: Set to disable the use of softdeletion. */
+
+ int deferDirectoryUpdate; /* Set to defer directory updates */
+
+#ifdef CONFIG_YAFFS_AUTO_UNICODE
+ int autoUnicode;
+#endif
+ int alwaysCheckErased; /* Force chunk erased check always on */
+};
- YCHAR *pathDividers; /* String of legal path dividers */
+typedef struct yaffs_DeviceParamStruct yaffs_DeviceParam;
+struct yaffs_DeviceStruct {
+ struct yaffs_DeviceParamStruct param;
- /* End of stuff that must be set before initialisation. */
+ /* Context storage. Holds extra OS specific data for this device */
- /* Checkpoint control. Can be set before or after initialisation */
- __u8 skipCheckpointRead;
- __u8 skipCheckpointWrite;
+ void *osContext;
+ void *driverContext;
+
+ struct ylist_head devList;
/* Runtime parameters. Set up by YAFFS. */
+ int nDataBytesPerChunk;
- __u16 chunkGroupBits; /* 0 for devices <= 32MB. else log2(nchunks) - 16 */
+ /* Non-wide tnode stuff */
+ __u16 chunkGroupBits; /* Number of bits that need to be resolved if
+ * the tnodes are not wide enough.
+ */
__u16 chunkGroupSize; /* == 2^^chunkGroupBits */
/* Stuff to support wide tnodes */
__u32 tnodeWidth;
__u32 tnodeMask;
+ __u32 tnodeSize;
/* Stuff for figuring out file offset to chunk conversions */
__u32 chunkShift; /* Shift value */
__u32 chunkDiv; /* Divisor after shifting: 1 for power-of-2 sizes */
__u32 chunkMask; /* Mask to use for power-of-2 case */
- /* Stuff to handle inband tags */
- int inbandTags;
- __u32 totalBytesPerChunk;
-
-#ifdef __KERNEL__
-
- struct semaphore sem; /* Semaphore for waiting on erasure.*/
- struct semaphore grossLock; /* Gross locking semaphore */
- __u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer
- * at compile time so we have to allocate it.
- */
- void (*putSuperFunc) (struct super_block *sb);
-#endif
- int isMounted;
+ int isMounted;
+ int readOnly;
int isCheckpointed;
@@ -682,51 +680,31 @@ struct yaffs_DeviceStruct {
__u32 allocationPage;
int allocationBlockFinder; /* Used to search for next allocation block */
- /* Runtime state */
- int nTnodesCreated;
- yaffs_Tnode *freeTnodes;
- int nFreeTnodes;
- yaffs_TnodeList *allocatedTnodeList;
-
- int isDoingGC;
- int gcBlock;
- int gcChunk;
-
- int nObjectsCreated;
- yaffs_Object *freeObjects;
- int nFreeObjects;
+ /* Object and Tnode memory management */
+ void *allocator;
+ int nObjects;
+ int nTnodes;
int nHardLinks;
- yaffs_ObjectList *allocatedObjectList;
-
yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS];
+ __u32 bucketFinder;
int nFreeChunks;
- int currentDirtyChecker; /* Used to find current dirtiest block */
-
+ /* Garbage collection control */
__u32 *gcCleanupList; /* objects to delete at the end of a GC. */
- int nonAggressiveSkip; /* GC state/mode */
+ __u32 nCleanups;
- /* Statistcs */
- int nPageWrites;
- int nPageReads;
- int nBlockErasures;
- int nErasureFailures;
- int nGCCopies;
- int garbageCollections;
- int passiveGarbageCollections;
- int nRetriedWrites;
- int nRetiredBlocks;
- int eccFixed;
- int eccUnfixed;
- int tagsEccFixed;
- int tagsEccUnfixed;
- int nDeletions;
- int nUnmarkedDeletions;
-
- int hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */
+ unsigned hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */
+ unsigned gcDisable;
+ unsigned gcBlockFinder;
+ unsigned gcDirtiest;
+ unsigned gcPagesInUse;
+ unsigned gcNotDone;
+ unsigned gcBlock;
+ unsigned gcChunk;
+ unsigned gcSkip;
/* Special directories */
yaffs_Object *rootDir;
@@ -743,8 +721,6 @@ struct yaffs_DeviceStruct {
yaffs_ChunkCache *srCache;
int srLastUse;
- int cacheHits;
-
/* Stuff for background deletion and unlinked files.*/
yaffs_Object *unlinkedDir; /* Directory where unlinked and deleted files live. */
yaffs_Object *deletedDir; /* Directory where deleted objects are sent to disappear. */
@@ -753,7 +729,6 @@ struct yaffs_DeviceStruct {
int nUnlinkedFiles; /* Count of unlinked files. */
int nBackgroundDeletions; /* Count of background deletions. */
-
/* Temporary buffer management */
yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS];
int maxTemp;
@@ -764,6 +739,36 @@ struct yaffs_DeviceStruct {
/* yaffs2 runtime stuff */
unsigned sequenceNumber; /* Sequence number of currently allocating block */
unsigned oldestDirtySequence;
+ unsigned oldestDirtyBlock;
+
+ /* Block refreshing */
+ int refreshSkip; /* A skip down counter. Refresh happens when this gets to zero. */
+
+ /* Dirty directory handling */
+ struct ylist_head dirtyDirectories; /* List of dirty directories */
+
+
+ /* Statistcs */
+ __u32 nPageWrites;
+ __u32 nPageReads;
+ __u32 nBlockErasures;
+ __u32 nErasureFailures;
+ __u32 nGCCopies;
+ __u32 allGCs;
+ __u32 passiveGCs;
+ __u32 oldestDirtyGCs;
+ __u32 nGCBlocks;
+ __u32 backgroundGCs;
+ __u32 nRetriedWrites;
+ __u32 nRetiredBlocks;
+ __u32 eccFixed;
+ __u32 eccUnfixed;
+ __u32 tagsEccFixed;
+ __u32 tagsEccUnfixed;
+ __u32 nDeletions;
+ __u32 nUnmarkedDeletions;
+ __u32 refreshCount;
+ __u32 cacheHits;
};
@@ -796,7 +801,6 @@ typedef struct {
/* yaffs2 runtime stuff */
unsigned sequenceNumber; /* Sequence number of currently allocating block */
- unsigned oldestDirtySequence;
} yaffs_CheckpointDevice;
@@ -809,6 +813,23 @@ typedef struct {
} yaffs_CheckpointValidity;
+struct yaffs_ShadowFixerStruct {
+ int objectId;
+ int shadowedId;
+ struct yaffs_ShadowFixerStruct *next;
+};
+
+/* Structure for doing xattr modifications */
+typedef struct {
+ int set; /* If 0 then this is a deletion */
+ const YCHAR *name;
+ const void *data;
+ int size;
+ int flags;
+ int result;
+}yaffs_XAttrMod;
+
+
/*----------------------- YAFFS Functions -----------------------*/
int yaffs_GutsInitialise(yaffs_Device *dev);
@@ -840,7 +861,8 @@ int yaffs_ResizeFile(yaffs_Object *obj,
yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
__u32 mode, __u32 uid, __u32 gid);
-int yaffs_FlushFile(yaffs_Object *obj, int updateTime);
+
+int yaffs_FlushFile(yaffs_Object *obj, int updateTime, int dataSync);
/* Flushing and checkpointing */
void yaffs_FlushEntireDeviceCache(yaffs_Device *dev);
@@ -873,6 +895,12 @@ YCHAR *yaffs_GetSymlinkAlias(yaffs_Objec
yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
__u32 mode, __u32 uid, __u32 gid, __u32 rdev);
+
+int yaffs_SetXAttribute(yaffs_Object *obj, const YCHAR *name, const void * value, int size, int flags);
+int yaffs_GetXAttribute(yaffs_Object *obj, const YCHAR *name, void *value, int size);
+int yaffs_ListXAttributes(yaffs_Object *obj, char *buffer, int size);
+int yaffs_RemoveXAttribute(yaffs_Object *obj, const YCHAR *name);
+
/* Special directories */
yaffs_Object *yaffs_Root(yaffs_Device *dev);
yaffs_Object *yaffs_LostNFound(yaffs_Device *dev);
@@ -882,18 +910,18 @@ yaffs_Object *yaffs_LostNFound(yaffs_Dev
void yfsd_WinFileTimeNow(__u32 target[2]);
#endif
-#ifdef __KERNEL__
-
void yaffs_HandleDeferedFree(yaffs_Object *obj);
-#endif
+
+void yaffs_UpdateDirtyDirectories(yaffs_Device *dev);
+
+int yaffs_BackgroundGarbageCollect(yaffs_Device *dev, unsigned urgency);
/* Debug dump */
int yaffs_DumpObject(yaffs_Object *obj);
void yaffs_GutsTest(yaffs_Device *dev);
-/* A few useful functions */
-void yaffs_InitialiseTags(yaffs_ExtendedTags *tags);
+/* A few useful functions to be used within the core files*/
void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn);
int yaffs_CheckFF(__u8 *buffer, int nBytes);
void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi);
@@ -901,4 +929,41 @@ void yaffs_HandleChunkError(yaffs_Device
__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo);
void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo);
+yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
+ int number,
+ yaffs_ObjectType type);
+int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
+ int chunkInNAND, int inScan);
+void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name);
+void yaffs_SetObjectNameFromOH(yaffs_Object *obj, const yaffs_ObjectHeader *oh);
+void yaffs_AddObjectToDirectory(yaffs_Object *directory,
+ yaffs_Object *obj);
+YCHAR *yaffs_CloneString(const YCHAR *str);
+void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
+void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo);
+int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
+ int force, int isShrink, int shadows,
+ yaffs_XAttrMod *xop);
+void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
+ int backwardScanning);
+int yaffs_CheckSpaceForAllocation(yaffs_Device *dev, int nChunks);
+yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev);
+yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
+ yaffs_FileStructure *fStruct,
+ __u32 chunkId,
+ yaffs_Tnode *passedTn);
+
+int yaffs_DoWriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
+ int nBytes, int writeThrough);
+void yaffs_ResizeDown( yaffs_Object *obj, loff_t newSize);
+void yaffs_SkipRestOfBlock(yaffs_Device *dev);
+
+int yaffs_CountFreeChunks(yaffs_Device *dev);
+
+yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
+ yaffs_FileStructure *fStruct,
+ __u32 chunkId);
+
+__u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos);
+
#endif
diff -Nrup a/fs/yaffs2/yaffsinterface.h b/fs/yaffs2/yaffsinterface.h
--- a/fs/yaffs2/yaffsinterface.h 2010-10-03 17:29:32.916000361 +0300
+++ b/fs/yaffs2/yaffsinterface.h 2010-10-03 18:03:47.543000365 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
diff -Nrup a/fs/yaffs2/yaffs_linux_allocator.c b/fs/yaffs2/yaffs_linux_allocator.c
--- a/fs/yaffs2/yaffs_linux_allocator.c 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_linux_allocator.c 2010-10-03 18:03:47.519000366 +0300
@@ -0,0 +1,200 @@
+/*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ *
+ * Note: Tis code is currently unused. Being checked in in case it becomes useful.
+ */
+
+
+#include "yaffs_allocator.h"
+#include "yaffs_guts.h"
+#include "yaffs_trace.h"
+#include "yportenv.h"
+#include "yaffs_linux.h"
+/*
+ * Start out with the same allocator as yaffs direct.
+ * Todo: Change to Linux slab allocator.
+ */
+
+
+
+#define NAMELEN 20
+struct yaffs_AllocatorStruct {
+ char tnode_name[NAMELEN+1];
+ char object_name[NAMELEN+1];
+ struct kmem_cache *tnode_cache;
+ struct kmem_cache *object_cache;
+};
+
+typedef struct yaffs_AllocatorStruct yaffs_Allocator;
+
+int mount_id;
+
+void yaffs_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
+
+ T(YAFFS_TRACE_ALLOCATE,(TSTR("Deinitialising yaffs allocator\n")));
+
+ if(allocator){
+ if(allocator->tnode_cache){
+ kmem_cache_destroy(allocator->tnode_cache);
+ allocator->tnode_cache = NULL;
+ } else {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("NULL tnode cache\n")));
+ YBUG();
+ }
+
+ if(allocator->object_cache){
+ kmem_cache_destroy(allocator->object_cache);
+ allocator->object_cache = NULL;
+ } else {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("NULL object cache\n")));
+ YBUG();
+ }
+
+ YFREE(allocator);
+
+ } else {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("Deinitialising NULL allocator\n")));
+ YBUG();
+ }
+ dev->allocator = NULL;
+}
+
+
+static void fake_ctor0(void *data){data = data;}
+static void fake_ctor1(void *data){data = data;}
+static void fake_ctor2(void *data){data = data;}
+static void fake_ctor3(void *data){data = data;}
+static void fake_ctor4(void *data){data = data;}
+static void fake_ctor5(void *data){data = data;}
+static void fake_ctor6(void *data){data = data;}
+static void fake_ctor7(void *data){data = data;}
+static void fake_ctor8(void *data){data = data;}
+static void fake_ctor9(void *data){data = data;}
+
+static void (*fake_ctor_list[10]) (void *) = {
+ fake_ctor0,
+ fake_ctor1,
+ fake_ctor2,
+ fake_ctor3,
+ fake_ctor4,
+ fake_ctor5,
+ fake_ctor6,
+ fake_ctor7,
+ fake_ctor8,
+ fake_ctor9,
+};
+
+void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator;
+ unsigned mount_id = yaffs_DeviceToLC(dev)->mount_id;
+
+ T(YAFFS_TRACE_ALLOCATE,(TSTR("Initialising yaffs allocator\n")));
+
+ if(dev->allocator)
+ YBUG();
+ else if(mount_id >= 10){
+ T(YAFFS_TRACE_ALWAYS,(TSTR("Bad mount_id %u\n"),mount_id));
+ } else {
+ allocator = YMALLOC(sizeof(yaffs_Allocator));
+ memset(allocator,0,sizeof(yaffs_Allocator));
+ dev->allocator = allocator;
+
+ if(!dev->allocator){
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs allocator creation failed\n")));
+ YBUG();
+ return;
+
+ }
+
+ sprintf(allocator->tnode_name,"yaffs_t_%u",mount_id);
+ sprintf(allocator->object_name,"yaffs_o_%u",mount_id);
+
+ allocator->tnode_cache =
+ kmem_cache_create(allocator->tnode_name,
+ dev->tnodeSize,
+ 0, 0,
+ fake_ctor_list[mount_id]);
+ if(allocator->tnode_cache)
+ T(YAFFS_TRACE_ALLOCATE,
+ (TSTR("tnode cache \"%s\" %p\n"),
+ allocator->tnode_name,allocator->tnode_cache));
+ else {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs cache creation failed\n")));
+ YBUG();
+ }
+
+
+ allocator->object_cache =
+ kmem_cache_create(allocator->object_name,
+ sizeof(yaffs_Object),
+ 0, 0,
+ fake_ctor_list[mount_id]);
+
+ if(allocator->object_cache)
+ T(YAFFS_TRACE_ALLOCATE,
+ (TSTR("object cache \"%s\" %p\n"),
+ allocator->object_name,allocator->object_cache));
+
+ else {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs cache creation failed\n")));
+ YBUG();
+ }
+ }
+}
+
+
+yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+ if(!allocator || !allocator->tnode_cache){
+ YBUG();
+ return NULL;
+ }
+ return kmem_cache_alloc(allocator->tnode_cache, GFP_NOFS);
+}
+
+void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+ kmem_cache_free(allocator->tnode_cache,tn);
+}
+
+yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+ if(!allocator){
+ YBUG();
+ return NULL;
+ }
+ if(!allocator->object_cache){
+ YBUG();
+ return NULL;
+ }
+ return kmem_cache_alloc(allocator->object_cache, GFP_NOFS);
+}
+
+void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *obj)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+ kmem_cache_free(allocator->object_cache,obj);
+}
diff -Nrup a/fs/yaffs2/yaffs_linux.h b/fs/yaffs2/yaffs_linux.h
--- a/fs/yaffs2/yaffs_linux.h 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_linux.h 2010-10-03 18:03:47.544000367 +0300
@@ -0,0 +1,43 @@
+/*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
+#ifndef __YAFFS_LINUX_H__
+#define __YAFFS_LINUX_H__
+
+#include "devextras.h"
+#include "yportenv.h"
+
+struct yaffs_LinuxContext {
+ struct ylist_head contextList; /* List of these we have mounted */
+ struct yaffs_DeviceStruct *dev;
+ struct super_block * superBlock;
+ struct task_struct *bgThread; /* Background thread for this device */
+ int bgRunning;
+ struct semaphore grossLock; /* Gross locking semaphore */
+ __u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer
+ * at compile time so we have to allocate it.
+ */
+ struct ylist_head searchContexts;
+ void (*putSuperFunc)(struct super_block *sb);
+
+ struct task_struct *readdirProcess;
+ unsigned mount_id;
+};
+
+#define yaffs_DeviceToLC(dev) ((struct yaffs_LinuxContext *)((dev)->osContext))
+#define yaffs_DeviceToMtd(dev) ((struct mtd_info *)((dev)->driverContext))
+
+#endif
+
diff -Nrup a/fs/yaffs2/yaffs_list.h b/fs/yaffs2/yaffs_list.h
--- a/fs/yaffs2/yaffs_list.h 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_list.h 2010-10-03 18:03:47.544000367 +0300
@@ -0,0 +1,127 @@
+/*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
+/*
+ * This file is just holds extra declarations of macros that would normally
+ * be providesd in the Linux kernel. These macros have been written from
+ * scratch but are functionally equivalent to the Linux ones.
+ *
+ */
+
+#ifndef __YAFFS_LIST_H__
+#define __YAFFS_LIST_H__
+
+
+#include "yportenv.h"
+
+/*
+ * This is a simple doubly linked list implementation that matches the
+ * way the Linux kernel doubly linked list implementation works.
+ */
+
+struct ylist_head {
+ struct ylist_head *next; /* next in chain */
+ struct ylist_head *prev; /* previous in chain */
+};
+
+
+/* Initialise a static list */
+#define YLIST_HEAD(name) \
+struct ylist_head name = { &(name), &(name)}
+
+
+
+/* Initialise a list head to an empty list */
+#define YINIT_LIST_HEAD(p) \
+do { \
+ (p)->next = (p);\
+ (p)->prev = (p); \
+} while (0)
+
+
+/* Add an element to a list */
+static Y_INLINE void ylist_add(struct ylist_head *newEntry,
+ struct ylist_head *list)
+{
+ struct ylist_head *listNext = list->next;
+
+ list->next = newEntry;
+ newEntry->prev = list;
+ newEntry->next = listNext;
+ listNext->prev = newEntry;
+
+}
+
+static Y_INLINE void ylist_add_tail(struct ylist_head *newEntry,
+ struct ylist_head *list)
+{
+ struct ylist_head *listPrev = list->prev;
+
+ list->prev = newEntry;
+ newEntry->next = list;
+ newEntry->prev = listPrev;
+ listPrev->next = newEntry;
+
+}
+
+
+/* Take an element out of its current list, with or without
+ * reinitialising the links.of the entry*/
+static Y_INLINE void ylist_del(struct ylist_head *entry)
+{
+ struct ylist_head *listNext = entry->next;
+ struct ylist_head *listPrev = entry->prev;
+
+ listNext->prev = listPrev;
+ listPrev->next = listNext;
+
+}
+
+static Y_INLINE void ylist_del_init(struct ylist_head *entry)
+{
+ ylist_del(entry);
+ entry->next = entry->prev = entry;
+}
+
+
+/* Test if the list is empty */
+static Y_INLINE int ylist_empty(struct ylist_head *entry)
+{
+ return (entry->next == entry);
+}
+
+
+/* ylist_entry takes a pointer to a list entry and offsets it to that
+ * we can find a pointer to the object it is embedded in.
+ */
+
+
+#define ylist_entry(entry, type, member) \
+ ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
+
+
+/* ylist_for_each and list_for_each_safe iterate over lists.
+ * ylist_for_each_safe uses temporary storage to make the list delete safe
+ */
+
+#define ylist_for_each(itervar, list) \
+ for (itervar = (list)->next; itervar != (list); itervar = itervar->next)
+
+#define ylist_for_each_safe(itervar, saveVar, list) \
+ for (itervar = (list)->next, saveVar = (list)->next->next; \
+ itervar != (list); itervar = saveVar, saveVar = saveVar->next)
+
+
+#endif
diff -Nrup a/fs/yaffs2/yaffs_mtdif1.c b/fs/yaffs2/yaffs_mtdif1.c
--- a/fs/yaffs2/yaffs_mtdif1.c 2010-10-03 17:48:22.719000363 +0300
+++ b/fs/yaffs2/yaffs_mtdif1.c 2010-10-03 18:03:47.519000366 +0300
@@ -2,7 +2,7 @@
* YAFFS: Yet another FFS. A NAND-flash specific file system.
* yaffs_mtdif1.c NAND mtd interface functions for small-page NAND.
*
- * Copyright (C) 2002 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* This program is free software; you can redistribute it and/or modify
@@ -24,9 +24,11 @@
*/
#include "yportenv.h"
+#include "yaffs_trace.h"
#include "yaffs_guts.h"
#include "yaffs_packedtags1.h"
#include "yaffs_tagscompat.h" /* for yaffs_CalcTagsECC */
+#include "yaffs_linux.h"
#include "linux/kernel.h"
#include "linux/version.h"
@@ -36,8 +38,6 @@
/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
-const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.10 2009-03-09 07:41:10 charles Exp $";
-
#ifndef CONFIG_YAFFS_9BYTE_TAGS
# define YTAG1_SIZE 8
#else
@@ -91,7 +91,7 @@ static struct nand_ecclayout nand_oob_16
int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
int chunkInNAND, const __u8 *data, const yaffs_ExtendedTags *etags)
{
- struct mtd_info *mtd = dev->genericDevice;
+ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
int chunkBytes = dev->nDataBytesPerChunk;
loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
struct mtd_oob_ops ops;
@@ -102,8 +102,6 @@ int nandmtd1_WriteChunkWithTagsToNAND(ya
compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
compile_time_assertion(sizeof(yaffs_Tags) == 8);
- dev->nPageWrites++;
-
yaffs_PackTags1(&pt1, etags);
yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
@@ -137,9 +135,9 @@ int nandmtd1_WriteChunkWithTagsToNAND(ya
retval = mtd->write_oob(mtd, addr, &ops);
if (retval) {
- yaffs_trace(YAFFS_TRACE_MTD,
- "write_oob failed, chunk %d, mtd error %d\n",
- chunkInNAND, retval);
+ T(YAFFS_TRACE_MTD,
+ (TSTR("write_oob failed, chunk %d, mtd error %d"TENDSTR),
+ chunkInNAND, retval));
}
return retval ? YAFFS_FAIL : YAFFS_OK;
}
@@ -171,7 +169,7 @@ static int rettags(yaffs_ExtendedTags *e
int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
int chunkInNAND, __u8 *data, yaffs_ExtendedTags *etags)
{
- struct mtd_info *mtd = dev->genericDevice;
+ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
int chunkBytes = dev->nDataBytesPerChunk;
loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
int eccres = YAFFS_ECC_RESULT_NO_ERROR;
@@ -180,8 +178,6 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y
int retval;
int deleted;
- dev->nPageReads++;
-
memset(&ops, 0, sizeof(ops));
ops.mode = MTD_OOB_AUTO;
ops.len = (data) ? chunkBytes : 0;
@@ -200,9 +196,9 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y
*/
retval = mtd->read_oob(mtd, addr, &ops);
if (retval) {
- yaffs_trace(YAFFS_TRACE_MTD,
- "read_oob failed, chunk %d, mtd error %d\n",
- chunkInNAND, retval);
+ T(YAFFS_TRACE_MTD,
+ (TSTR("read_oob failed, chunk %d, mtd error %d"TENDSTR),
+ chunkInNAND, retval));
}
switch (retval) {
@@ -284,11 +280,11 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y
*/
int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
{
- struct mtd_info *mtd = dev->genericDevice;
- int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
+ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
+ int blocksize = dev->param.nChunksPerBlock * dev->nDataBytesPerChunk;
int retval;
- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad\n", blockNo);
+ T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("marking block %d bad"TENDSTR), blockNo));
retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
return (retval) ? YAFFS_FAIL : YAFFS_OK;
@@ -305,9 +301,9 @@ static int nandmtd1_TestPrerequists(stru
int oobavail = mtd->ecclayout->oobavail;
if (oobavail < YTAG1_SIZE) {
- yaffs_trace(YAFFS_TRACE_ERROR,
- "mtd device has only %d bytes for tags, need %d\n",
- oobavail, YTAG1_SIZE);
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("mtd device has only %d bytes for tags, need %d"TENDSTR),
+ oobavail, YTAG1_SIZE));
return YAFFS_FAIL;
}
return YAFFS_OK;
@@ -325,8 +321,8 @@ static int nandmtd1_TestPrerequists(stru
int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
yaffs_BlockState *pState, __u32 *pSequenceNumber)
{
- struct mtd_info *mtd = dev->genericDevice;
- int chunkNo = blockNo * dev->nChunksPerBlock;
+ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
+ int chunkNo = blockNo * dev->param.nChunksPerBlock;
loff_t addr = (loff_t)chunkNo * dev->nDataBytesPerChunk;
yaffs_ExtendedTags etags;
int state = YAFFS_BLOCK_STATE_DEAD;
@@ -342,8 +338,8 @@ int nandmtd1_QueryNANDBlock(struct yaffs
retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
etags.blockBad = (mtd->block_isbad)(mtd, addr);
if (etags.blockBad) {
- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
- "block %d is marked bad\n", blockNo);
+ T(YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("block %d is marked bad"TENDSTR), blockNo));
state = YAFFS_BLOCK_STATE_DEAD;
} else if (etags.eccResult != YAFFS_ECC_RESULT_NO_ERROR) {
/* bad tags, need to look more closely */
diff -Nrup a/fs/yaffs2/yaffs_mtdif1-compat.c b/fs/yaffs2/yaffs_mtdif1-compat.c
--- a/fs/yaffs2/yaffs_mtdif1-compat.c 2010-10-03 17:29:32.916000361 +0300
+++ b/fs/yaffs2/yaffs_mtdif1-compat.c 1970-01-01 02:00:00.000000000 +0200
@@ -1,434 +0,0 @@
-From ian@brightstareng.com Fri May 18 15:06:49 2007
-From ian@brightstareng.com Fri May 18 15:08:21 2007
-Received: from 206.173.66.57.ptr.us.xo.net ([206.173.66.57] helo=zebra.brightstareng.com)
- by apollo.linkchoose.co.uk with esmtp (Exim 4.60)
- (envelope-from <ian@brightstareng.com>)
- id 1Hp380-00011e-T6
- for david.goodenough@linkchoose.co.uk; Fri, 18 May 2007 15:08:21 +0100
-Received: from localhost (localhost.localdomain [127.0.0.1])
- by zebra.brightstareng.com (Postfix) with ESMTP
- id 4819F28C004; Fri, 18 May 2007 10:07:49 -0400 (EDT)
-Received: from zebra.brightstareng.com ([127.0.0.1])
- by localhost (zebra [127.0.0.1]) (amavisd-new, port 10024) with ESMTP
- id 05328-06; Fri, 18 May 2007 10:07:16 -0400 (EDT)
-Received: from pippin (unknown [192.168.1.25])
- by zebra.brightstareng.com (Postfix) with ESMTP
- id 8BEF528C1BC; Fri, 18 May 2007 10:06:53 -0400 (EDT)
-From: Ian McDonnell <ian@brightstareng.com>
-To: David Goodenough <david.goodenough@linkchoose.co.uk>
-Subject: Re: something tested this time -- yaffs_mtdif1-compat.c
-Date: Fri, 18 May 2007 10:06:49 -0400
-User-Agent: KMail/1.9.1
-References: <200705142207.06909.ian@brightstareng.com> <200705171131.53536.ian@brightstareng.com> <200705181334.32166.david.goodenough@linkchoose.co.uk>
-In-Reply-To: <200705181334.32166.david.goodenough@linkchoose.co.uk>
-Cc: Andrea Conti <alyf@alyf.net>,
- Charles Manning <manningc2@actrix.gen.nz>
-MIME-Version: 1.0
-Content-Type: Multipart/Mixed;
- boundary="Boundary-00=_5LbTGmt62YoutxM"
-Message-Id: <200705181006.49860.ian@brightstareng.com>
-X-Virus-Scanned: by amavisd-new at brightstareng.com
-Status: R
-X-Status: NT
-X-KMail-EncryptionState:
-X-KMail-SignatureState:
-X-KMail-MDN-Sent:
-
---Boundary-00=_5LbTGmt62YoutxM
-Content-Type: text/plain;
- charset="iso-8859-15"
-Content-Transfer-Encoding: 7bit
-Content-Disposition: inline
-
-David, Andrea,
-
-On Friday 18 May 2007 08:34, you wrote:
-> Yea team. With this fix in place (I put it in the wrong place
-> at first) I can now mount and ls the Yaffs partition without
-> an error messages!
-
-Good news!
-
-Attached is a newer yaffs_mtdif1.c with a bandaid to help the
-2.6.18 and 2.6.19 versions of MTD not trip on the oob read.
-See the LINUX_VERSION_CODE conditional in
-nandmtd1_ReadChunkWithTagsFromNAND.
-
--imcd
-
---Boundary-00=_5LbTGmt62YoutxM
-Content-Type: text/x-csrc;
- charset="iso-8859-15";
- name="yaffs_mtdif1.c"
-Content-Transfer-Encoding: 7bit
-Content-Disposition: attachment;
- filename="yaffs_mtdif1.c"
-
-/*
- * YAFFS: Yet another FFS. A NAND-flash specific file system.
- * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND.
- *
- * Copyright (C) 2002 Aleph One Ltd.
- * for Toby Churchill Ltd and Brightstar Engineering
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-/*
- * This module provides the interface between yaffs_nand.c and the
- * MTD API. This version is used when the MTD interface supports the
- * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17,
- * and we have small-page NAND device.
- *
- * These functions are invoked via function pointers in yaffs_nand.c.
- * This replaces functionality provided by functions in yaffs_mtdif.c
- * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are
- * called in yaffs_mtdif.c when the function pointers are NULL.
- * We assume the MTD layer is performing ECC (useNANDECC is true).
- */
-
-#include "yportenv.h"
-#include "yaffs_guts.h"
-#include "yaffs_packedtags1.h"
-#include "yaffs_tagscompat.h" // for yaffs_CalcTagsECC
-
-#include "linux/kernel.h"
-#include "linux/version.h"
-#include "linux/types.h"
-#include "linux/mtd/mtd.h"
-
-/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
-
-const char *yaffs_mtdif1_c_version = "$Id$";
-
-#ifndef CONFIG_YAFFS_9BYTE_TAGS
-# define YTAG1_SIZE 8
-#else
-# define YTAG1_SIZE 9
-#endif
-
-#if 0
-/* Use the following nand_ecclayout with MTD when using
- * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout.
- * If you have existing Yaffs images and the byte order differs from this,
- * adjust 'oobfree' to match your existing Yaffs data.
- *
- * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the
- * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to
- * the 9th byte.
- *
- * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5
- * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P
- * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus
- * byte and B is the small-page bad-block indicator byte.
- */
-static struct nand_ecclayout nand_oob_16 = {
- .eccbytes = 6,
- .eccpos = { 8, 9, 10, 13, 14, 15 },
- .oobavail = 9,
- .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
-};
-#endif
-
-/* Write a chunk (page) of data to NAND.
- *
- * Caller always provides ExtendedTags data which are converted to a more
- * compact (packed) form for storage in NAND. A mini-ECC runs over the
- * contents of the tags meta-data; used to valid the tags when read.
- *
- * - Pack ExtendedTags to PackedTags1 form
- * - Compute mini-ECC for PackedTags1
- * - Write data and packed tags to NAND.
- *
- * Note: Due to the use of the PackedTags1 meta-data which does not include
- * a full sequence number (as found in the larger PackedTags2 form) it is
- * necessary for Yaffs to re-write a chunk/page (just once) to mark it as
- * discarded and dirty. This is not ideal: newer NAND parts are supposed
- * to be written just once. When Yaffs performs this operation, this
- * function is called with a NULL data pointer -- calling MTD write_oob
- * without data is valid usage (2.6.17).
- *
- * Any underlying MTD error results in YAFFS_FAIL.
- * Returns YAFFS_OK or YAFFS_FAIL.
- */
-int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
- int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags)
-{
- struct mtd_info * mtd = dev->genericDevice;
- int chunkBytes = dev->nDataBytesPerChunk;
- loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
- struct mtd_oob_ops ops;
- yaffs_PackedTags1 pt1;
- int retval;
-
- /* we assume that PackedTags1 and yaffs_Tags are compatible */
- compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
- compile_time_assertion(sizeof(yaffs_Tags) == 8);
-
- yaffs_PackTags1(&pt1, etags);
- yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
-
- /* When deleting a chunk, the upper layer provides only skeletal
- * etags, one with chunkDeleted set. However, we need to update the
- * tags, not erase them completely. So we use the NAND write property
- * that only zeroed-bits stick and set tag bytes to all-ones and
- * zero just the (not) deleted bit.
- */
-#ifndef CONFIG_YAFFS_9BYTE_TAGS
- if (etags->chunkDeleted) {
- memset(&pt1, 0xff, 8);
- /* clear delete status bit to indicate deleted */
- pt1.deleted = 0;
- }
-#else
- ((__u8 *)&pt1)[8] = 0xff;
- if (etags->chunkDeleted) {
- memset(&pt1, 0xff, 8);
- /* zero pageStatus byte to indicate deleted */
- ((__u8 *)&pt1)[8] = 0;
- }
-#endif
-
- memset(&ops, 0, sizeof(ops));
- ops.mode = MTD_OOB_AUTO;
- ops.len = (data) ? chunkBytes : 0;
- ops.ooblen = YTAG1_SIZE;
- ops.datbuf = (__u8 *)data;
- ops.oobbuf = (__u8 *)&pt1;
-
- retval = mtd->write_oob(mtd, addr, &ops);
- if (retval) {
- yaffs_trace(YAFFS_TRACE_MTD,
- "write_oob failed, chunk %d, mtd error %d\n",
- chunkInNAND, retval);
- }
- return retval ? YAFFS_FAIL : YAFFS_OK;
-}
-
-/* Return with empty ExtendedTags but add eccResult.
- */
-static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval)
-{
- if (etags) {
- memset(etags, 0, sizeof(*etags));
- etags->eccResult = eccResult;
- }
- return retval;
-}
-
-/* Read a chunk (page) from NAND.
- *
- * Caller expects ExtendedTags data to be usable even on error; that is,
- * all members except eccResult and blockBad are zeroed.
- *
- * - Check ECC results for data (if applicable)
- * - Check for blank/erased block (return empty ExtendedTags if blank)
- * - Check the PackedTags1 mini-ECC (correct if necessary/possible)
- * - Convert PackedTags1 to ExtendedTags
- * - Update eccResult and blockBad members to refect state.
- *
- * Returns YAFFS_OK or YAFFS_FAIL.
- */
-int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
- int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags)
-{
- struct mtd_info * mtd = dev->genericDevice;
- int chunkBytes = dev->nDataBytesPerChunk;
- loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
- int eccres = YAFFS_ECC_RESULT_NO_ERROR;
- struct mtd_oob_ops ops;
- yaffs_PackedTags1 pt1;
- int retval;
- int deleted;
-
- memset(&ops, 0, sizeof(ops));
- ops.mode = MTD_OOB_AUTO;
- ops.len = (data) ? chunkBytes : 0;
- ops.ooblen = YTAG1_SIZE;
- ops.datbuf = data;
- ops.oobbuf = (__u8 *)&pt1;
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
- /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
- * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
- */
- ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
-#endif
- /* Read page and oob using MTD.
- * Check status and determine ECC result.
- */
- retval = mtd->read_oob(mtd, addr, &ops);
- if (retval) {
- yaffs_trace(YAFFS_TRACE_MTD,
- "read_oob failed, chunk %d, mtd error %d\n",
- chunkInNAND, retval);
- }
-
- switch (retval) {
- case 0:
- /* no error */
- break;
-
- case -EUCLEAN:
- /* MTD's ECC fixed the data */
- eccres = YAFFS_ECC_RESULT_FIXED;
- dev->eccFixed++;
- break;
-
- case -EBADMSG:
- /* MTD's ECC could not fix the data */
- dev->eccUnfixed++;
- /* fall into... */
- default:
- rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
- etags->blockBad = (mtd->block_isbad)(mtd, addr);
- return YAFFS_FAIL;
- }
-
- /* Check for a blank/erased chunk.
- */
- if (yaffs_CheckFF((__u8 *)&pt1, 8)) {
- /* when blank, upper layers want eccResult to be <= NO_ERROR */
- return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK);
- }
-
-#ifndef CONFIG_YAFFS_9BYTE_TAGS
- /* Read deleted status (bit) then return it to it's non-deleted
- * state before performing tags mini-ECC check. pt1.deleted is
- * inverted.
- */
- deleted = !pt1.deleted;
- pt1.deleted = 1;
-#else
- (void) deleted; /* not used */
-#endif
-
- /* Check the packed tags mini-ECC and correct if necessary/possible.
- */
- retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
- switch (retval) {
- case 0:
- /* no tags error, use MTD result */
- break;
- case 1:
- /* recovered tags-ECC error */
- dev->tagsEccFixed++;
- eccres = YAFFS_ECC_RESULT_FIXED;
- break;
- default:
- /* unrecovered tags-ECC error */
- dev->tagsEccUnfixed++;
- return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL);
- }
-
- /* Unpack the tags to extended form and set ECC result.
- * [set shouldBeFF just to keep yaffs_UnpackTags1 happy]
- */
- pt1.shouldBeFF = 0xFFFFFFFF;
- yaffs_UnpackTags1(etags, &pt1);
- etags->eccResult = eccres;
-
- /* Set deleted state.
- */
-#ifndef CONFIG_YAFFS_9BYTE_TAGS
- etags->chunkDeleted = deleted;
-#else
- etags->chunkDeleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
-#endif
- return YAFFS_OK;
-}
-
-/* Mark a block bad.
- *
- * This is a persistant state.
- * Use of this function should be rare.
- *
- * Returns YAFFS_OK or YAFFS_FAIL.
- */
-int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
-{
- struct mtd_info * mtd = dev->genericDevice;
- int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
- int retval;
-
- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo);
-
- retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
- return (retval) ? YAFFS_FAIL : YAFFS_OK;
-}
-
-/* Check any MTD prerequists.
- *
- * Returns YAFFS_OK or YAFFS_FAIL.
- */
-static int nandmtd1_TestPrerequists(struct mtd_info * mtd)
-{
- /* 2.6.18 has mtd->ecclayout->oobavail */
- /* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */
- int oobavail = mtd->ecclayout->oobavail;
-
- if (oobavail < YTAG1_SIZE) {
- yaffs_trace(YAFFS_TRACE_ERROR,
- "mtd device has only %d bytes for tags, need %d",
- oobavail, YTAG1_SIZE);
- return YAFFS_FAIL;
- }
- return YAFFS_OK;
-}
-
-/* Query for the current state of a specific block.
- *
- * Examine the tags of the first chunk of the block and return the state:
- * - YAFFS_BLOCK_STATE_DEAD, the block is marked bad
- * - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use
- * - YAFFS_BLOCK_STATE_EMPTY, the block is clean
- *
- * Always returns YAFFS_OK.
- */
-int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
- yaffs_BlockState * pState, int *pSequenceNumber)
-{
- struct mtd_info * mtd = dev->genericDevice;
- int chunkNo = blockNo * dev->nChunksPerBlock;
- yaffs_ExtendedTags etags;
- int state = YAFFS_BLOCK_STATE_DEAD;
- int seqnum = 0;
- int retval;
-
- /* We don't yet have a good place to test for MTD config prerequists.
- * Do it here as we are called during the initial scan.
- */
- if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) {
- return YAFFS_FAIL;
- }
-
- retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
- if (etags.blockBad) {
- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
- "block %d is marked bad", blockNo);
- state = YAFFS_BLOCK_STATE_DEAD;
- }
- else if (etags.chunkUsed) {
- state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
- seqnum = etags.sequenceNumber;
- }
- else {
- state = YAFFS_BLOCK_STATE_EMPTY;
- }
-
- *pState = state;
- *pSequenceNumber = seqnum;
-
- /* query always succeeds */
- return YAFFS_OK;
-}
-
-#endif /*KERNEL_VERSION*/
-
---Boundary-00=_5LbTGmt62YoutxM--
-
-
-
diff -Nrup a/fs/yaffs2/yaffs_mtdif1.h b/fs/yaffs2/yaffs_mtdif1.h
--- a/fs/yaffs2/yaffs_mtdif1.h 2010-10-03 17:48:22.719000363 +0300
+++ b/fs/yaffs2/yaffs_mtdif1.h 2010-10-03 18:03:47.545000367 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* This program is free software; you can redistribute it and/or modify
diff -Nrup a/fs/yaffs2/yaffs_mtdif2.c b/fs/yaffs2/yaffs_mtdif2.c
--- a/fs/yaffs2/yaffs_mtdif2.c 2010-10-03 17:48:22.720000363 +0300
+++ b/fs/yaffs2/yaffs_mtdif2.c 2010-10-03 18:03:47.520000367 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -13,11 +13,8 @@
/* mtd interface for YAFFS2 */
-const char *yaffs_mtdif2_c_version =
- "$Id: yaffs_mtdif2.c,v 1.23 2009-03-06 17:20:53 wookey Exp $";
-
#include "yportenv.h"
-
+#include "yaffs_trace.h"
#include "yaffs_mtdif2.h"
@@ -27,6 +24,8 @@ const char *yaffs_mtdif2_c_version =
#include "yaffs_packedtags2.h"
+#include "yaffs_linux.h"
+
/* NB For use with inband tags....
* We assume that the data buffer is of size totalBytersPerChunk so that we can also
* use it to load the tags.
@@ -35,7 +34,7 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya
const __u8 *data,
const yaffs_ExtendedTags *tags)
{
- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
struct mtd_oob_ops ops;
#else
@@ -47,13 +46,16 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya
yaffs_PackedTags2 pt;
+ int packed_tags_size = dev->param.noTagsECC ? sizeof(pt.t) : sizeof(pt);
+ void * packed_tags_ptr = dev->param.noTagsECC ? (void *) &pt.t : (void *)&pt;
+
T(YAFFS_TRACE_MTD,
(TSTR
("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
TENDSTR), chunkInNAND, data, tags));
- addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
+ addr = ((loff_t) chunkInNAND) * dev->param.totalBytesPerChunk;
/* For yaffs2 writing there must be both data and tags.
* If we're using inband tags, then the tags are stuffed into
@@ -61,30 +63,30 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya
*/
if (!data || !tags)
BUG();
- else if (dev->inbandTags) {
+ else if (dev->param.inbandTags) {
yaffs_PackedTags2TagsPart *pt2tp;
pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);
yaffs_PackTags2TagsPart(pt2tp, tags);
} else
- yaffs_PackTags2(&pt, tags);
+ yaffs_PackTags2(&pt, tags, !dev->param.noTagsECC);
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
ops.mode = MTD_OOB_AUTO;
- ops.ooblen = (dev->inbandTags) ? 0 : sizeof(pt);
- ops.len = dev->totalBytesPerChunk;
+ ops.ooblen = (dev->param.inbandTags) ? 0 : packed_tags_size;
+ ops.len = dev->param.totalBytesPerChunk;
ops.ooboffs = 0;
ops.datbuf = (__u8 *)data;
- ops.oobbuf = (dev->inbandTags) ? NULL : (void *)&pt;
+ ops.oobbuf = (dev->param.inbandTags) ? NULL : packed_tags_ptr;
retval = mtd->write_oob(mtd, addr, &ops);
#else
- if (!dev->inbandTags) {
+ if (!dev->param.inbandTags) {
retval =
mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
- &dummy, data, (__u8 *) &pt, NULL);
+ &dummy, data, (__u8 *) packed_tags_ptr, NULL);
} else {
retval =
- mtd->write(mtd, addr, dev->totalBytesPerChunk, &dummy,
+ mtd->write(mtd, addr, dev->param.totalBytesPerChunk, &dummy,
data);
}
#endif
@@ -98,7 +100,7 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya
int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
__u8 *data, yaffs_ExtendedTags *tags)
{
- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
struct mtd_oob_ops ops;
#endif
@@ -106,16 +108,19 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
int retval = 0;
int localData = 0;
- loff_t addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
+ loff_t addr = ((loff_t) chunkInNAND) * dev->param.totalBytesPerChunk;
yaffs_PackedTags2 pt;
+ int packed_tags_size = dev->param.noTagsECC ? sizeof(pt.t) : sizeof(pt);
+ void * packed_tags_ptr = dev->param.noTagsECC ? (void *) &pt.t: (void *)&pt;
+
T(YAFFS_TRACE_MTD,
(TSTR
("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
TENDSTR), chunkInNAND, data, tags));
- if (dev->inbandTags) {
+ if (dev->param.inbandTags) {
if (!data) {
localData = 1;
@@ -127,20 +132,20 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- if (dev->inbandTags || (data && !tags))
- retval = mtd->read(mtd, addr, dev->totalBytesPerChunk,
+ if (dev->param.inbandTags || (data && !tags))
+ retval = mtd->read(mtd, addr, dev->param.totalBytesPerChunk,
&dummy, data);
else if (tags) {
ops.mode = MTD_OOB_AUTO;
- ops.ooblen = sizeof(pt);
- ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
+ ops.ooblen = packed_tags_size;
+ ops.len = data ? dev->nDataBytesPerChunk : packed_tags_size;
ops.ooboffs = 0;
ops.datbuf = data;
- ops.oobbuf = dev->spareBuffer;
+ ops.oobbuf = yaffs_DeviceToLC(dev)->spareBuffer;
retval = mtd->read_oob(mtd, addr, &ops);
}
#else
- if (!dev->inbandTags && data && tags) {
+ if (!dev->param.inbandTags && data && tags) {
retval = mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
&dummy, data, dev->spareBuffer,
@@ -150,7 +155,7 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
retval =
mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
data);
- if (!dev->inbandTags && tags)
+ if (!dev->param.inbandTags && tags)
retval =
mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
dev->spareBuffer);
@@ -158,7 +163,7 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
#endif
- if (dev->inbandTags) {
+ if (dev->param.inbandTags) {
if (tags) {
yaffs_PackedTags2TagsPart *pt2tp;
pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];
@@ -166,16 +171,22 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
}
} else {
if (tags) {
- memcpy(&pt, dev->spareBuffer, sizeof(pt));
- yaffs_UnpackTags2(tags, &pt);
+ memcpy(packed_tags_ptr, yaffs_DeviceToLC(dev)->spareBuffer, packed_tags_size);
+ yaffs_UnpackTags2(tags, &pt, !dev->param.noTagsECC);
}
}
if (localData)
yaffs_ReleaseTempBuffer(dev, data, __LINE__);
- if (tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
+ if (tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) {
tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
+ dev->eccUnfixed++;
+ }
+ if(tags && retval == -EUCLEAN && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) {
+ tags->eccResult = YAFFS_ECC_RESULT_FIXED;
+ dev->eccFixed++;
+ }
if (retval == 0)
return YAFFS_OK;
else
@@ -184,15 +195,15 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
{
- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
int retval;
T(YAFFS_TRACE_MTD,
(TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
retval =
mtd->block_markbad(mtd,
- blockNo * dev->nChunksPerBlock *
- dev->totalBytesPerChunk);
+ blockNo * dev->param.nChunksPerBlock *
+ dev->param.totalBytesPerChunk);
if (retval == 0)
return YAFFS_OK;
@@ -204,15 +215,15 @@ int nandmtd2_MarkNANDBlockBad(struct yaf
int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
yaffs_BlockState *state, __u32 *sequenceNumber)
{
- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
int retval;
T(YAFFS_TRACE_MTD,
(TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
retval =
mtd->block_isbad(mtd,
- blockNo * dev->nChunksPerBlock *
- dev->totalBytesPerChunk);
+ blockNo * dev->param.nChunksPerBlock *
+ dev->param.totalBytesPerChunk);
if (retval) {
T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
@@ -223,7 +234,7 @@ int nandmtd2_QueryNANDBlock(struct yaffs
yaffs_ExtendedTags t;
nandmtd2_ReadChunkWithTagsFromNAND(dev,
blockNo *
- dev->nChunksPerBlock, NULL,
+ dev->param.nChunksPerBlock, NULL,
&t);
if (t.chunkUsed) {
diff -Nrup a/fs/yaffs2/yaffs_mtdif2.h b/fs/yaffs2/yaffs_mtdif2.h
--- a/fs/yaffs2/yaffs_mtdif2.h 2010-10-03 17:48:22.720000363 +0300
+++ b/fs/yaffs2/yaffs_mtdif2.h 2010-10-03 18:03:47.545000367 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
diff -Nrup a/fs/yaffs2/yaffs_mtdif.c b/fs/yaffs2/yaffs_mtdif.c
--- a/fs/yaffs2/yaffs_mtdif.c 2010-10-03 17:48:22.720000363 +0300
+++ b/fs/yaffs2/yaffs_mtdif.c 2010-10-03 18:03:47.521000367 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -11,9 +11,6 @@
* published by the Free Software Foundation.
*/
-const char *yaffs_mtdif_c_version =
- "$Id: yaffs_mtdif.c,v 1.22 2009-03-06 17:20:51 wookey Exp $";
-
#include "yportenv.h"
@@ -24,208 +21,26 @@ const char *yaffs_mtdif_c_version =
#include "linux/time.h"
#include "linux/mtd/nand.h"
-#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 18))
-static struct nand_oobinfo yaffs_oobinfo = {
- .useecc = 1,
- .eccbytes = 6,
- .eccpos = {8, 9, 10, 13, 14, 15}
-};
-
-static struct nand_oobinfo yaffs_noeccinfo = {
- .useecc = 0,
-};
-#endif
-
-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
-static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob)
-{
- oob[0] = spare->tagByte0;
- oob[1] = spare->tagByte1;
- oob[2] = spare->tagByte2;
- oob[3] = spare->tagByte3;
- oob[4] = spare->tagByte4;
- oob[5] = spare->tagByte5 & 0x3f;
- oob[5] |= spare->blockStatus == 'Y' ? 0 : 0x80;
- oob[5] |= spare->pageStatus == 0 ? 0 : 0x40;
- oob[6] = spare->tagByte6;
- oob[7] = spare->tagByte7;
-}
-
-static inline void translate_oob2spare(yaffs_Spare *spare, __u8 *oob)
-{
- struct yaffs_NANDSpare *nspare = (struct yaffs_NANDSpare *)spare;
- spare->tagByte0 = oob[0];
- spare->tagByte1 = oob[1];
- spare->tagByte2 = oob[2];
- spare->tagByte3 = oob[3];
- spare->tagByte4 = oob[4];
- spare->tagByte5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f;
- spare->blockStatus = oob[5] & 0x80 ? 0xff : 'Y';
- spare->pageStatus = oob[5] & 0x40 ? 0xff : 0;
- spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff;
- spare->tagByte6 = oob[6];
- spare->tagByte7 = oob[7];
- spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff;
-
- nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */
-}
-#endif
-
-int nandmtd_WriteChunkToNAND(yaffs_Device *dev, int chunkInNAND,
- const __u8 *data, const yaffs_Spare *spare)
-{
- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
- struct mtd_oob_ops ops;
-#endif
- size_t dummy;
- int retval = 0;
-
- loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
- __u8 spareAsBytes[8]; /* OOB */
-
- if (data && !spare)
- retval = mtd->write(mtd, addr, dev->nDataBytesPerChunk,
- &dummy, data);
- else if (spare) {
- if (dev->useNANDECC) {
- translate_spare2oob(spare, spareAsBytes);
- ops.mode = MTD_OOB_AUTO;
- ops.ooblen = 8; /* temp hack */
- } else {
- ops.mode = MTD_OOB_RAW;
- ops.ooblen = YAFFS_BYTES_PER_SPARE;
- }
- ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
- ops.datbuf = (u8 *)data;
- ops.ooboffs = 0;
- ops.oobbuf = spareAsBytes;
- retval = mtd->write_oob(mtd, addr, &ops);
- }
-#else
- __u8 *spareAsBytes = (__u8 *) spare;
-
- if (data && spare) {
- if (dev->useNANDECC)
- retval =
- mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
- &dummy, data, spareAsBytes,
- &yaffs_oobinfo);
- else
- retval =
- mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
- &dummy, data, spareAsBytes,
- &yaffs_noeccinfo);
- } else {
- if (data)
- retval =
- mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
- data);
- if (spare)
- retval =
- mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
- &dummy, spareAsBytes);
- }
-#endif
-
- if (retval == 0)
- return YAFFS_OK;
- else
- return YAFFS_FAIL;
-}
-
-int nandmtd_ReadChunkFromNAND(yaffs_Device *dev, int chunkInNAND, __u8 *data,
- yaffs_Spare *spare)
-{
- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
- struct mtd_oob_ops ops;
-#endif
- size_t dummy;
- int retval = 0;
-
- loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
- __u8 spareAsBytes[8]; /* OOB */
-
- if (data && !spare)
- retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
- &dummy, data);
- else if (spare) {
- if (dev->useNANDECC) {
- ops.mode = MTD_OOB_AUTO;
- ops.ooblen = 8; /* temp hack */
- } else {
- ops.mode = MTD_OOB_RAW;
- ops.ooblen = YAFFS_BYTES_PER_SPARE;
- }
- ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
- ops.datbuf = data;
- ops.ooboffs = 0;
- ops.oobbuf = spareAsBytes;
- retval = mtd->read_oob(mtd, addr, &ops);
- if (dev->useNANDECC)
- translate_oob2spare(spare, spareAsBytes);
- }
-#else
- __u8 *spareAsBytes = (__u8 *) spare;
-
- if (data && spare) {
- if (dev->useNANDECC) {
- /* Careful, this call adds 2 ints */
- /* to the end of the spare data. Calling function */
- /* should allocate enough memory for spare, */
- /* i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. */
- retval =
- mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
- &dummy, data, spareAsBytes,
- &yaffs_oobinfo);
- } else {
- retval =
- mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
- &dummy, data, spareAsBytes,
- &yaffs_noeccinfo);
- }
- } else {
- if (data)
- retval =
- mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
- data);
- if (spare)
- retval =
- mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
- &dummy, spareAsBytes);
- }
-#endif
-
- if (retval == 0)
- return YAFFS_OK;
- else
- return YAFFS_FAIL;
-}
+#include "yaffs_linux.h"
int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber)
{
- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
__u32 addr =
- ((loff_t) blockNumber) * dev->nDataBytesPerChunk
- * dev->nChunksPerBlock;
+ ((loff_t) blockNumber) * dev->param.totalBytesPerChunk
+ * dev->param.nChunksPerBlock;
struct erase_info ei;
+
int retval = 0;
ei.mtd = mtd;
ei.addr = addr;
- ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock;
+ ei.len = dev->param.totalBytesPerChunk * dev->param.nChunksPerBlock;
ei.time = 1000;
ei.retries = 2;
ei.callback = NULL;
ei.priv = (u_long) dev;
- /* Todo finish off the ei if required */
-
- sema_init(&dev->sem, 0);
-
retval = mtd->erase(mtd, &ei);
if (retval == 0)
diff -Nrup a/fs/yaffs2/yaffs_mtdif.h b/fs/yaffs2/yaffs_mtdif.h
--- a/fs/yaffs2/yaffs_mtdif.h 2010-10-03 17:48:22.721000363 +0300
+++ b/fs/yaffs2/yaffs_mtdif.h 2010-10-03 18:03:47.546000366 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -22,11 +22,6 @@
extern struct nand_oobinfo yaffs_oobinfo;
extern struct nand_oobinfo yaffs_noeccinfo;
#endif
-
-int nandmtd_WriteChunkToNAND(yaffs_Device *dev, int chunkInNAND,
- const __u8 *data, const yaffs_Spare *spare);
-int nandmtd_ReadChunkFromNAND(yaffs_Device *dev, int chunkInNAND, __u8 *data,
- yaffs_Spare *spare);
int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber);
int nandmtd_InitialiseNAND(yaffs_Device *dev);
#endif
diff -Nrup a/fs/yaffs2/yaffs_nameval.c b/fs/yaffs2/yaffs_nameval.c
--- a/fs/yaffs2/yaffs_nameval.c 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_nameval.c 2010-10-03 18:03:47.523000363 +0300
@@ -0,0 +1,197 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * This simple implementation of a name-value store assumes a small number of values and fits
+ * into a small finite buffer.
+ *
+ * Each attribute is stored as a record:
+ * sizeof(int) bytes record size.
+ * strnlen+1 bytes name null terminated.
+ * nbytes value.
+ * ----------
+ * total size stored in record size
+ *
+ * This code has not been tested with unicode yet.
+ */
+
+
+#include "yaffs_nameval.h"
+
+#include "yportenv.h"
+
+static int nval_find(const char *xb, int xb_size, const YCHAR *name,
+ int *exist_size)
+{
+ int pos=0;
+ int size;
+
+ memcpy(&size,xb,sizeof(int));
+ while(size > 0 && (size < xb_size) && (pos + size < xb_size)){
+ if(yaffs_strncmp((YCHAR *)(xb+pos+sizeof(int)),name,size) == 0){
+ if(exist_size)
+ *exist_size = size;
+ return pos;
+ }
+ pos += size;
+ if(pos < xb_size -sizeof(int))
+ memcpy(&size,xb + pos,sizeof(int));
+ else
+ size = 0;
+ }
+ if(exist_size)
+ *exist_size = 0;
+ return -1;
+}
+
+static int nval_used(const char *xb, int xb_size)
+{
+ int pos=0;
+ int size;
+
+ memcpy(&size,xb + pos,sizeof(int));
+ while(size > 0 && (size < xb_size) && (pos + size < xb_size)){
+ pos += size;
+ if(pos < xb_size -sizeof(int))
+ memcpy(&size,xb + pos,sizeof(int));
+ else
+ size = 0;
+ }
+ return pos;
+}
+
+int nval_del(char *xb, int xb_size, const YCHAR *name)
+{
+ int pos = nval_find(xb, xb_size, name, NULL);
+ int size;
+
+ if(pos >= 0 && pos < xb_size){
+ /* Find size, shift rest over this record, then zero out the rest of buffer */
+ memcpy(&size,xb+pos,sizeof(int));
+ memcpy(xb + pos, xb + pos + size, xb_size - (pos + size));
+ memset(xb + (xb_size - size),0,size);
+ return 0;
+ } else
+ return -ENODATA;
+}
+
+int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf, int bsize, int flags)
+{
+ int pos;
+ int namelen = yaffs_strnlen(name,xb_size);
+ int reclen;
+ int size_exist = 0;
+ int space;
+ int start;
+
+ pos = nval_find(xb,xb_size,name, &size_exist);
+
+ if(flags & XATTR_CREATE && pos >= 0)
+ return -EEXIST;
+ if(flags & XATTR_REPLACE && pos < 0)
+ return -ENODATA;
+
+ start = nval_used(xb,xb_size);
+ space = xb_size - start + size_exist;
+
+ reclen = (sizeof(int) + namelen + 1 + bsize);
+
+ if(reclen > space)
+ return -ENOSPC;
+
+ if(pos >= 0){
+ nval_del(xb,xb_size,name);
+ start = nval_used(xb, xb_size);
+ }
+
+ pos = start;
+
+ memcpy(xb + pos,&reclen,sizeof(int));
+ pos +=sizeof(int);
+ yaffs_strncpy((YCHAR *)(xb + pos), name, reclen);
+ pos+= (namelen+1);
+ memcpy(xb + pos,buf,bsize);
+ return 0;
+}
+
+int nval_get(const char *xb, int xb_size, const YCHAR *name, char *buf, int bsize)
+{
+ int pos = nval_find(xb,xb_size,name,NULL);
+ int size;
+
+ if(pos >= 0 && pos< xb_size){
+
+ memcpy(&size,xb +pos,sizeof(int));
+ pos+=sizeof(int); /* advance past record length */
+ size -= sizeof(int);
+
+ /* Advance over name string */
+ while(xb[pos] && size > 0 && pos < xb_size){
+ pos++;
+ size--;
+ }
+ /*Advance over NUL */
+ pos++;
+ size--;
+
+ if(size <= bsize){
+ memcpy(buf,xb + pos,size);
+ return size;
+ }
+
+ }
+ if(pos >= 0)
+ return -ERANGE;
+ else
+ return -ENODATA;
+}
+
+int nval_list(const char *xb, int xb_size, char *buf, int bsize)
+{
+ int pos = 0;
+ int size;
+ int name_len;
+ int ncopied = 0;
+ int filled = 0;
+
+ memcpy(&size,xb + pos,sizeof(int));
+ while(size > sizeof(int) && size <= xb_size && (pos + size) < xb_size && !filled){
+ pos+= sizeof(int);
+ size-=sizeof(int);
+ name_len = yaffs_strnlen((YCHAR *)(xb + pos), size);
+ if(ncopied + name_len + 1 < bsize){
+ memcpy(buf,xb+pos,name_len * sizeof(YCHAR));
+ buf+= name_len;
+ *buf = '\0';
+ buf++;
+ if(sizeof(YCHAR) > 1){
+ *buf = '\0';
+ buf++;
+ }
+ ncopied += (name_len+1);
+ } else
+ filled = 1;
+ pos+=size;
+ if(pos < xb_size -sizeof(int))
+ memcpy(&size,xb + pos,sizeof(int));
+ else
+ size = 0;
+ }
+ return ncopied;
+}
+
+
+int nval_hasvalues(const char *xb, int xb_size)
+{
+ return nval_used(xb, xb_size) > 0;
+}
diff -Nrup a/fs/yaffs2/yaffs_nameval.h b/fs/yaffs2/yaffs_nameval.h
--- a/fs/yaffs2/yaffs_nameval.h 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_nameval.h 2010-10-03 18:03:47.546000366 +0300
@@ -0,0 +1,25 @@
+/*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+#ifndef __NAMEVAL_H__
+#define __NAMEVAL_H__
+
+#include "yportenv.h"
+
+int nval_del(char *xb, int xb_size, const YCHAR *name);
+int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf, int bsize, int flags);
+int nval_get(const char *xb, int xb_size, const YCHAR *name, char *buf, int bsize);
+int nval_list(const char *xb, int xb_size, char *buf, int bsize);
+int nval_hasvalues(const char *xb, int xb_size);
+#endif
diff -Nrup a/fs/yaffs2/yaffs_nand.c b/fs/yaffs2/yaffs_nand.c
--- a/fs/yaffs2/yaffs_nand.c 2010-10-03 17:48:22.721000363 +0300
+++ b/fs/yaffs2/yaffs_nand.c 2010-10-03 18:03:47.524000359 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -11,9 +11,6 @@
* published by the Free Software Foundation.
*/
-const char *yaffs_nand_c_version =
- "$Id: yaffs_nand.c,v 1.10 2009-03-06 17:20:54 wookey Exp $";
-
#include "yaffs_nand.h"
#include "yaffs_tagscompat.h"
#include "yaffs_tagsvalidity.h"
@@ -29,12 +26,14 @@ int yaffs_ReadChunkWithTagsFromNAND(yaff
int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
+ dev->nPageReads++;
+
/* If there are no tags provided, use local tags to get prioritised gc working */
if (!tags)
tags = &localTags;
- if (dev->readChunkWithTagsFromNAND)
- result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
+ if (dev->param.readChunkWithTagsFromNAND)
+ result = dev->param.readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
tags);
else
result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
@@ -44,7 +43,8 @@ int yaffs_ReadChunkWithTagsFromNAND(yaff
if (tags &&
tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR) {
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock);
+ yaffs_BlockInfo *bi;
+ bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->param.nChunksPerBlock);
yaffs_HandleChunkError(dev, bi);
}
@@ -56,6 +56,9 @@ int yaffs_WriteChunkWithTagsToNAND(yaffs
const __u8 *buffer,
yaffs_ExtendedTags *tags)
{
+
+ dev->nPageWrites++;
+
chunkInNAND -= dev->chunkOffset;
@@ -75,8 +78,8 @@ int yaffs_WriteChunkWithTagsToNAND(yaffs
YBUG();
}
- if (dev->writeChunkWithTagsToNAND)
- return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
+ if (dev->param.writeChunkWithTagsToNAND)
+ return dev->param.writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
tags);
else
return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
@@ -89,9 +92,9 @@ int yaffs_MarkBlockBad(yaffs_Device *dev
{
blockNo -= dev->blockOffset;
-;
- if (dev->markNANDBlockBad)
- return dev->markNANDBlockBad(dev, blockNo);
+
+ if (dev->param.markNANDBlockBad)
+ return dev->param.markNANDBlockBad(dev, blockNo);
else
return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
}
@@ -103,8 +106,8 @@ int yaffs_QueryInitialBlockState(yaffs_D
{
blockNo -= dev->blockOffset;
- if (dev->queryNANDBlock)
- return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
+ if (dev->param.queryNANDBlock)
+ return dev->param.queryNANDBlock(dev, blockNo, state, sequenceNumber);
else
return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
state,
@@ -119,16 +122,18 @@ int yaffs_EraseBlockInNAND(struct yaffs_
blockInNAND -= dev->blockOffset;
-
dev->nBlockErasures++;
- result = dev->eraseBlockInNAND(dev, blockInNAND);
+
+ result = dev->param.eraseBlockInNAND(dev, blockInNAND);
return result;
}
int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
{
- return dev->initialiseNAND(dev);
+ if(dev->param.initialiseNAND)
+ return dev->param.initialiseNAND(dev);
+ return YAFFS_OK;
}
diff -Nrup a/fs/yaffs2/yaffs_nandemul2k.h b/fs/yaffs2/yaffs_nandemul2k.h
--- a/fs/yaffs2/yaffs_nandemul2k.h 2010-10-03 17:48:22.721000364 +0300
+++ b/fs/yaffs2/yaffs_nandemul2k.h 2010-10-03 18:03:47.546000366 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
diff -Nrup a/fs/yaffs2/yaffs_nand.h b/fs/yaffs2/yaffs_nand.h
--- a/fs/yaffs2/yaffs_nand.h 2010-10-03 17:48:22.721000364 +0300
+++ b/fs/yaffs2/yaffs_nand.h 2010-10-03 18:03:47.547000363 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
diff -Nrup a/fs/yaffs2/yaffs_packedtags1.c b/fs/yaffs2/yaffs_packedtags1.c
--- a/fs/yaffs2/yaffs_packedtags1.c 2010-10-03 17:48:22.721000364 +0300
+++ b/fs/yaffs2/yaffs_packedtags1.c 2010-10-03 18:03:47.524000359 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
diff -Nrup a/fs/yaffs2/yaffs_packedtags1.h b/fs/yaffs2/yaffs_packedtags1.h
--- a/fs/yaffs2/yaffs_packedtags1.h 2010-10-03 17:48:22.721000364 +0300
+++ b/fs/yaffs2/yaffs_packedtags1.h 2010-10-03 18:03:47.547000363 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
diff -Nrup a/fs/yaffs2/yaffs_packedtags2.c b/fs/yaffs2/yaffs_packedtags2.c
--- a/fs/yaffs2/yaffs_packedtags2.c 2010-10-03 17:48:22.722000365 +0300
+++ b/fs/yaffs2/yaffs_packedtags2.c 2010-10-03 18:03:47.524000359 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -13,6 +13,7 @@
#include "yaffs_packedtags2.h"
#include "yportenv.h"
+#include "yaffs_trace.h"
#include "yaffs_tagsvalidity.h"
/* This code packs a set of extended tags into a binary structure for
@@ -96,17 +97,14 @@ void yaffs_PackTags2TagsPart(yaffs_Packe
}
-void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t)
+void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t, int tagsECC)
{
yaffs_PackTags2TagsPart(&pt->t, t);
-#ifndef YAFFS_IGNORE_TAGS_ECC
- {
+ if(tagsECC)
yaffs_ECCCalculateOther((unsigned char *)&pt->t,
sizeof(yaffs_PackedTags2TagsPart),
&pt->ecc);
- }
-#endif
}
@@ -158,27 +156,24 @@ void yaffs_UnpackTags2TagsPart(yaffs_Ext
}
-void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt)
+void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt, int tagsECC)
{
yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_NO_ERROR;
- if (pt->t.sequenceNumber != 0xFFFFFFFF) {
- /* Page is in use */
-#ifndef YAFFS_IGNORE_TAGS_ECC
- {
- yaffs_ECCOther ecc;
- int result;
- yaffs_ECCCalculateOther((unsigned char *)&pt->t,
- sizeof
- (yaffs_PackedTags2TagsPart),
- &ecc);
- result =
- yaffs_ECCCorrectOther((unsigned char *)&pt->t,
- sizeof
- (yaffs_PackedTags2TagsPart),
- &pt->ecc, &ecc);
- switch (result) {
+ if (pt->t.sequenceNumber != 0xFFFFFFFF &&
+ tagsECC){
+ /* Chunk is in use and we need to do ECC */
+
+ yaffs_ECCOther ecc;
+ int result;
+ yaffs_ECCCalculateOther((unsigned char *)&pt->t,
+ sizeof(yaffs_PackedTags2TagsPart),
+ &ecc);
+ result = yaffs_ECCCorrectOther((unsigned char *)&pt->t,
+ sizeof(yaffs_PackedTags2TagsPart),
+ &pt->ecc, &ecc);
+ switch (result) {
case 0:
eccResult = YAFFS_ECC_RESULT_NO_ERROR;
break;
@@ -190,9 +185,7 @@ void yaffs_UnpackTags2(yaffs_ExtendedTag
break;
default:
eccResult = YAFFS_ECC_RESULT_UNKNOWN;
- }
}
-#endif
}
yaffs_UnpackTags2TagsPart(t, &pt->t);
@@ -201,6 +194,5 @@ void yaffs_UnpackTags2(yaffs_ExtendedTag
yaffs_DumpPackedTags2(pt);
yaffs_DumpTags2(t);
-
}
diff -Nrup a/fs/yaffs2/yaffs_packedtags2.h b/fs/yaffs2/yaffs_packedtags2.h
--- a/fs/yaffs2/yaffs_packedtags2.h 2010-10-03 17:48:22.722000365 +0300
+++ b/fs/yaffs2/yaffs_packedtags2.h 2010-10-03 18:03:47.547000363 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -34,8 +34,8 @@ typedef struct {
} yaffs_PackedTags2;
/* Full packed tags with ECC, used for oob tags */
-void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t);
-void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt);
+void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t, int tagsECC);
+void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt, int tagsECC);
/* Only the tags part (no ECC for use with inband tags */
void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *pt, const yaffs_ExtendedTags *t);
diff -Nrup a/fs/yaffs2/yaffs_qsort.h b/fs/yaffs2/yaffs_qsort.h
--- a/fs/yaffs2/yaffs_qsort.h 2010-10-03 17:48:22.724000363 +0300
+++ b/fs/yaffs2/yaffs_qsort.h 2010-10-03 18:03:47.548000359 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -17,7 +17,18 @@
#ifndef __YAFFS_QSORT_H__
#define __YAFFS_QSORT_H__
+#ifdef __KERNEL__
+#include <linux/sort.h>
+
+extern void yaffs_qsort(void *const base, size_t total_elems, size_t size,
+ int (*cmp)(const void *, const void *)){
+ sort(base, total_elems, size, cmp, NULL);
+}
+
+#else
+
extern void yaffs_qsort(void *const base, size_t total_elems, size_t size,
int (*cmp)(const void *, const void *));
#endif
+#endif
diff -Nrup a/fs/yaffs2/yaffs_tagscompat.c b/fs/yaffs2/yaffs_tagscompat.c
--- a/fs/yaffs2/yaffs_tagscompat.c 2010-10-03 17:48:22.724000363 +0300
+++ b/fs/yaffs2/yaffs_tagscompat.c 2010-10-03 18:03:47.525000359 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -15,6 +15,7 @@
#include "yaffs_tagscompat.h"
#include "yaffs_ecc.h"
#include "yaffs_getblockinfo.h"
+#include "yaffs_trace.h"
static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND);
#ifdef NOTYET
@@ -163,15 +164,14 @@ static int yaffs_WriteChunkToNAND(struct
int chunkInNAND, const __u8 *data,
yaffs_Spare *spare)
{
- if (chunkInNAND < dev->startBlock * dev->nChunksPerBlock) {
+ if (chunkInNAND < dev->param.startBlock * dev->param.nChunksPerBlock) {
T(YAFFS_TRACE_ERROR,
(TSTR("**>> yaffs chunk %d is not valid" TENDSTR),
chunkInNAND));
return YAFFS_FAIL;
}
- dev->nPageWrites++;
- return dev->writeChunkToNAND(dev, chunkInNAND, data, spare);
+ return dev->param.writeChunkToNAND(dev, chunkInNAND, data, spare);
}
static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
@@ -184,16 +184,14 @@ static int yaffs_ReadChunkFromNAND(struc
int retVal;
yaffs_Spare localSpare;
- dev->nPageReads++;
-
if (!spare && data) {
/* If we don't have a real spare, then we use a local one. */
/* Need this for the calculation of the ecc */
spare = &localSpare;
}
- if (!dev->useNANDECC) {
- retVal = dev->readChunkFromNAND(dev, chunkInNAND, data, spare);
+ if (!dev->param.useNANDECC) {
+ retVal = dev->param.readChunkFromNAND(dev, chunkInNAND, data, spare);
if (data && doErrorCorrection) {
/* Do ECC correction */
/* Todo handle any errors */
@@ -254,7 +252,7 @@ static int yaffs_ReadChunkFromNAND(struc
memset(&nspare, 0, sizeof(nspare));
- retVal = dev->readChunkFromNAND(dev, chunkInNAND, data,
+ retVal = dev->param.readChunkFromNAND(dev, chunkInNAND, data,
(yaffs_Spare *) &nspare);
memcpy(spare, &nspare, sizeof(yaffs_Spare));
if (data && doErrorCorrection) {
@@ -307,10 +305,10 @@ static int yaffs_CheckChunkErased(struct
static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK];
static __u8 data[YAFFS_BYTES_PER_CHUNK];
/* Might as well always allocate the larger size for */
- /* dev->useNANDECC == true; */
+ /* dev->param.useNANDECC == true; */
static __u8 spare[sizeof(struct yaffs_NANDSpare)];
- dev->readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare);
+ dev->param.readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare);
if (!init) {
memset(cmpbuf, 0xff, YAFFS_BYTES_PER_CHUNK);
@@ -333,7 +331,7 @@ static int yaffs_CheckChunkErased(struct
static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND)
{
- int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
+ int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock;
/* Mark the block for retirement */
yaffs_GetBlockInfo(dev, blockInNAND + dev->blockOffset)->needsRetiring = 1;
@@ -365,7 +363,7 @@ static void yaffs_HandleUpdateChunk(yaff
static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND)
{
- int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
+ int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock;
/* Mark the block for retirement */
yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1;
@@ -424,7 +422,7 @@ int yaffs_TagsCompatabilityWriteChunkWit
tags.serialNumber = eTags->serialNumber;
- if (!dev->useNANDECC && data)
+ if (!dev->param.useNANDECC && data)
yaffs_CalcECC(data, &spare);
yaffs_LoadTagsIntoSpare(&spare, &tags);
@@ -498,9 +496,9 @@ int yaffs_TagsCompatabilityMarkNANDBlock
spare.blockStatus = 'Y';
- yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL,
+ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->param.nChunksPerBlock, NULL,
&spare);
- yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1,
+ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->param.nChunksPerBlock + 1,
NULL, &spare);
return YAFFS_OK;
@@ -525,9 +523,9 @@ int yaffs_TagsCompatabilityQueryNANDBloc
*sequenceNumber = 0;
- yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock, NULL,
+ yaffs_ReadChunkFromNAND(dev, blockNo * dev->param.nChunksPerBlock, NULL,
&spare0, &dummy, 1);
- yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock + 1, NULL,
+ yaffs_ReadChunkFromNAND(dev, blockNo * dev->param.nChunksPerBlock + 1, NULL,
&spare1, &dummy, 1);
if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7)
diff -Nrup a/fs/yaffs2/yaffs_tagscompat.h b/fs/yaffs2/yaffs_tagscompat.h
--- a/fs/yaffs2/yaffs_tagscompat.h 2010-10-03 17:48:22.724000363 +0300
+++ b/fs/yaffs2/yaffs_tagscompat.h 2010-10-03 18:03:47.548000359 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
diff -Nrup a/fs/yaffs2/yaffs_tagsvalidity.c b/fs/yaffs2/yaffs_tagsvalidity.c
--- a/fs/yaffs2/yaffs_tagsvalidity.c 2010-10-03 17:48:22.725000363 +0300
+++ b/fs/yaffs2/yaffs_tagsvalidity.c 2010-10-03 18:03:47.526000362 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
diff -Nrup a/fs/yaffs2/yaffs_tagsvalidity.h b/fs/yaffs2/yaffs_tagsvalidity.h
--- a/fs/yaffs2/yaffs_tagsvalidity.h 2010-10-03 17:48:22.725000363 +0300
+++ b/fs/yaffs2/yaffs_tagsvalidity.h 2010-10-03 18:03:47.549000359 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
diff -Nrup a/fs/yaffs2/yaffs_trace.h b/fs/yaffs2/yaffs_trace.h
--- a/fs/yaffs2/yaffs_trace.h 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_trace.h 2010-10-03 18:03:47.550000362 +0300
@@ -0,0 +1,60 @@
+/*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
+
+#ifndef __YTRACE_H__
+#define __YTRACE_H__
+
+extern unsigned int yaffs_traceMask;
+extern unsigned int yaffs_wr_attempts;
+
+/*
+ * Tracing flags.
+ * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
+ */
+
+#define YAFFS_TRACE_OS 0x00000002
+#define YAFFS_TRACE_ALLOCATE 0x00000004
+#define YAFFS_TRACE_SCAN 0x00000008
+#define YAFFS_TRACE_BAD_BLOCKS 0x00000010
+#define YAFFS_TRACE_ERASE 0x00000020
+#define YAFFS_TRACE_GC 0x00000040
+#define YAFFS_TRACE_WRITE 0x00000080
+#define YAFFS_TRACE_TRACING 0x00000100
+#define YAFFS_TRACE_DELETION 0x00000200
+#define YAFFS_TRACE_BUFFERS 0x00000400
+#define YAFFS_TRACE_NANDACCESS 0x00000800
+#define YAFFS_TRACE_GC_DETAIL 0x00001000
+#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
+#define YAFFS_TRACE_MTD 0x00004000
+#define YAFFS_TRACE_CHECKPOINT 0x00008000
+
+#define YAFFS_TRACE_VERIFY 0x00010000
+#define YAFFS_TRACE_VERIFY_NAND 0x00020000
+#define YAFFS_TRACE_VERIFY_FULL 0x00040000
+#define YAFFS_TRACE_VERIFY_ALL 0x000F0000
+
+#define YAFFS_TRACE_SYNC 0x00100000
+#define YAFFS_TRACE_BACKGROUND 0x00200000
+#define YAFFS_TRACE_LOCK 0x00400000
+
+#define YAFFS_TRACE_ERROR 0x40000000
+#define YAFFS_TRACE_BUG 0x80000000
+#define YAFFS_TRACE_ALWAYS 0xF0000000
+
+
+#define T(mask, p) do { if ((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p); } while (0)
+
+#endif
diff -Nrup a/fs/yaffs2/yaffs_verify.c b/fs/yaffs2/yaffs_verify.c
--- a/fs/yaffs2/yaffs_verify.c 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_verify.c 2010-10-03 18:03:47.527000365 +0300
@@ -0,0 +1,626 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+
+#include "yaffs_verify.h"
+#include "yaffs_trace.h"
+#include "yaffs_bitmap.h"
+#include "yaffs_getblockinfo.h"
+#include "yaffs_nand.h"
+
+int yaffs_SkipVerification(yaffs_Device *dev)
+{
+ dev=dev;
+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
+}
+
+static int yaffs_SkipFullVerification(yaffs_Device *dev)
+{
+ dev=dev;
+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
+}
+
+static int yaffs_SkipNANDVerification(yaffs_Device *dev)
+{
+ dev=dev;
+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
+}
+
+
+static const char *blockStateName[] = {
+"Unknown",
+"Needs scanning",
+"Scanning",
+"Empty",
+"Allocating",
+"Full",
+"Dirty",
+"Checkpoint",
+"Collecting",
+"Dead"
+};
+
+
+void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
+{
+ int actuallyUsed;
+ int inUse;
+
+ if (yaffs_SkipVerification(dev))
+ return;
+
+ /* Report illegal runtime states */
+ if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
+
+ switch (bi->blockState) {
+ case YAFFS_BLOCK_STATE_UNKNOWN:
+ case YAFFS_BLOCK_STATE_SCANNING:
+ case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
+ n, blockStateName[bi->blockState]));
+ }
+
+ /* Check pages in use and soft deletions are legal */
+
+ actuallyUsed = bi->pagesInUse - bi->softDeletions;
+
+ if (bi->pagesInUse < 0 || bi->pagesInUse > dev->param.nChunksPerBlock ||
+ bi->softDeletions < 0 || bi->softDeletions > dev->param.nChunksPerBlock ||
+ actuallyUsed < 0 || actuallyUsed > dev->param.nChunksPerBlock)
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
+ n, bi->pagesInUse, bi->softDeletions));
+
+
+ /* Check chunk bitmap legal */
+ inUse = yaffs_CountChunkBits(dev, n);
+ if (inUse != bi->pagesInUse)
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
+ n, bi->pagesInUse, inUse));
+
+}
+
+
+
+void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
+{
+ yaffs_VerifyBlock(dev, bi, n);
+
+ /* After collection the block should be in the erased state */
+
+ if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
+ bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
+ T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
+ n, bi->blockState));
+ }
+}
+
+void yaffs_VerifyBlocks(yaffs_Device *dev)
+{
+ int i;
+ int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
+ int nIllegalBlockStates = 0;
+
+ if (yaffs_SkipVerification(dev))
+ return;
+
+ memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
+
+ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
+ yaffs_VerifyBlock(dev, bi, i);
+
+ if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
+ nBlocksPerState[bi->blockState]++;
+ else
+ nIllegalBlockStates++;
+ }
+
+ T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
+
+ T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
+ if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
+ T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
+
+ for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("%s %d blocks"TENDSTR),
+ blockStateName[i], nBlocksPerState[i]));
+
+ if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
+ dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
+
+ if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
+ dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
+
+ if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
+ nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
+
+ T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
+
+}
+
+/*
+ * Verify the object header. oh must be valid, but obj and tags may be NULL in which
+ * case those tests will not be performed.
+ */
+void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
+{
+ if (obj && yaffs_SkipVerification(obj->myDev))
+ return;
+
+ if (!(tags && obj && oh)) {
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Verifying object header tags %p obj %p oh %p"TENDSTR),
+ tags, obj, oh));
+ return;
+ }
+
+ if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
+ oh->type > YAFFS_OBJECT_TYPE_MAX)
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
+ tags->objectId, oh->type));
+
+ if (tags->objectId != obj->objectId)
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
+ tags->objectId, obj->objectId));
+
+
+ /*
+ * Check that the object's parent ids match if parentCheck requested.
+ *
+ * Tests do not apply to the root object.
+ */
+
+ if (parentCheck && tags->objectId > 1 && !obj->parent)
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
+ tags->objectId, oh->parentObjectId));
+
+ if (parentCheck && obj->parent &&
+ oh->parentObjectId != obj->parent->objectId &&
+ (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
+ obj->parent->objectId != YAFFS_OBJECTID_DELETED))
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
+ tags->objectId, oh->parentObjectId, obj->parent->objectId));
+
+ if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header name is NULL"TENDSTR),
+ obj->objectId));
+
+ if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header name is 0xFF"TENDSTR),
+ obj->objectId));
+}
+
+
+#if 0
+/* Not being used, but don't want to throw away yet */
+int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
+ __u32 level, int chunkOffset)
+{
+ int i;
+ yaffs_Device *dev = obj->myDev;
+ int ok = 1;
+
+ if (tn) {
+ if (level > 0) {
+
+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
+ if (tn->internal[i]) {
+ ok = yaffs_VerifyTnodeWorker(obj,
+ tn->internal[i],
+ level - 1,
+ (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
+ }
+ }
+ } else if (level == 0) {
+ yaffs_ExtendedTags tags;
+ __u32 objectId = obj->objectId;
+
+ chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
+
+ for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
+ __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+
+ if (theChunk > 0) {
+ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
+ yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
+ if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
+ T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
+ objectId, chunkOffset, theChunk,
+ tags.objectId, tags.chunkId));
+ }
+ }
+ chunkOffset++;
+ }
+ }
+ }
+
+ return ok;
+
+}
+
+#endif
+
+void yaffs_VerifyFile(yaffs_Object *obj)
+{
+ int requiredTallness;
+ int actualTallness;
+ __u32 lastChunk;
+ __u32 x;
+ __u32 i;
+ yaffs_Device *dev;
+ yaffs_ExtendedTags tags;
+ yaffs_Tnode *tn;
+ __u32 objectId;
+
+ if (!obj)
+ return;
+
+ if (yaffs_SkipVerification(obj->myDev))
+ return;
+
+ dev = obj->myDev;
+ objectId = obj->objectId;
+
+ /* Check file size is consistent with tnode depth */
+ lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
+ x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
+ requiredTallness = 0;
+ while (x > 0) {
+ x >>= YAFFS_TNODES_INTERNAL_BITS;
+ requiredTallness++;
+ }
+
+ actualTallness = obj->variant.fileVariant.topLevel;
+
+ /* Check that the chunks in the tnode tree are all correct.
+ * We do this by scanning through the tnode tree and
+ * checking the tags for every chunk match.
+ */
+
+ if (yaffs_SkipNANDVerification(dev))
+ return;
+
+ for (i = 1; i <= lastChunk; i++) {
+ tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
+
+ if (tn) {
+ __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+ if (theChunk > 0) {
+ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
+ yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
+ if (tags.objectId != objectId || tags.chunkId != i) {
+ T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
+ objectId, i, theChunk,
+ tags.objectId, tags.chunkId));
+ }
+ }
+ }
+ }
+}
+
+
+void yaffs_VerifyHardLink(yaffs_Object *obj)
+{
+ if (obj && yaffs_SkipVerification(obj->myDev))
+ return;
+
+ /* Verify sane equivalent object */
+}
+
+void yaffs_VerifySymlink(yaffs_Object *obj)
+{
+ if (obj && yaffs_SkipVerification(obj->myDev))
+ return;
+
+ /* Verify symlink string */
+}
+
+void yaffs_VerifySpecial(yaffs_Object *obj)
+{
+ if (obj && yaffs_SkipVerification(obj->myDev))
+ return;
+}
+
+void yaffs_VerifyObject(yaffs_Object *obj)
+{
+ yaffs_Device *dev;
+
+ __u32 chunkMin;
+ __u32 chunkMax;
+
+ __u32 chunkIdOk;
+ __u32 chunkInRange;
+ __u32 chunkShouldNotBeDeleted;
+ __u32 chunkValid;
+
+ if (!obj)
+ return;
+
+ if (obj->beingCreated)
+ return;
+
+ dev = obj->myDev;
+
+ if (yaffs_SkipVerification(dev))
+ return;
+
+ /* Check sane object header chunk */
+
+ chunkMin = dev->internalStartBlock * dev->param.nChunksPerBlock;
+ chunkMax = (dev->internalEndBlock+1) * dev->param.nChunksPerBlock - 1;
+
+ chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
+ chunkIdOk = chunkInRange || (obj->hdrChunk == 0);
+ chunkValid = chunkInRange &&
+ yaffs_CheckChunkBit(dev,
+ obj->hdrChunk / dev->param.nChunksPerBlock,
+ obj->hdrChunk % dev->param.nChunksPerBlock);
+ chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
+
+ if (!obj->fake &&
+ (!chunkIdOk || chunkShouldNotBeDeleted)) {
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
+ obj->objectId, obj->hdrChunk,
+ chunkIdOk ? "" : ",out of range",
+ chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
+ }
+
+ if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
+ yaffs_ExtendedTags tags;
+ yaffs_ObjectHeader *oh;
+ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+
+ oh = (yaffs_ObjectHeader *)buffer;
+
+ yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
+ &tags);
+
+ yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
+
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+ }
+
+ /* Verify it has a parent */
+ if (obj && !obj->fake &&
+ (!obj->parent || obj->parent->myDev != dev)) {
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
+ obj->objectId, obj->parent));
+ }
+
+ /* Verify parent is a directory */
+ if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
+ obj->objectId, obj->parent->variantType));
+ }
+
+ switch (obj->variantType) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ yaffs_VerifyFile(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ yaffs_VerifySymlink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ yaffs_VerifyDirectory(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ yaffs_VerifyHardLink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ yaffs_VerifySpecial(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ default:
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d has illegaltype %d"TENDSTR),
+ obj->objectId, obj->variantType));
+ break;
+ }
+}
+
+void yaffs_VerifyObjects(yaffs_Device *dev)
+{
+ yaffs_Object *obj;
+ int i;
+ struct ylist_head *lh;
+
+ if (yaffs_SkipVerification(dev))
+ return;
+
+ /* Iterate through the objects in each hash entry */
+
+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+ ylist_for_each(lh, &dev->objectBucket[i].list) {
+ if (lh) {
+ obj = ylist_entry(lh, yaffs_Object, hashLink);
+ yaffs_VerifyObject(obj);
+ }
+ }
+ }
+}
+
+
+void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
+{
+ struct ylist_head *lh;
+ yaffs_Object *listObj;
+
+ int count = 0;
+
+ if (!obj) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
+ YBUG();
+ return;
+ }
+
+ if (yaffs_SkipVerification(obj->myDev))
+ return;
+
+ if (!obj->parent) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
+ YBUG();
+ return;
+ }
+
+ if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
+ YBUG();
+ }
+
+ /* Iterate through the objects in each hash entry */
+
+ ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
+ if (lh) {
+ listObj = ylist_entry(lh, yaffs_Object, siblings);
+ yaffs_VerifyObject(listObj);
+ if (obj == listObj)
+ count++;
+ }
+ }
+
+ if (count != 1) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
+ YBUG();
+ }
+}
+
+void yaffs_VerifyDirectory(yaffs_Object *directory)
+{
+ struct ylist_head *lh;
+ yaffs_Object *listObj;
+
+ if (!directory) {
+ YBUG();
+ return;
+ }
+
+ if (yaffs_SkipFullVerification(directory->myDev))
+ return;
+
+ if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
+ YBUG();
+ }
+
+ /* Iterate through the objects in each hash entry */
+
+ ylist_for_each(lh, &directory->variant.directoryVariant.children) {
+ if (lh) {
+ listObj = ylist_entry(lh, yaffs_Object, siblings);
+ if (listObj->parent != directory) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
+ YBUG();
+ }
+ yaffs_VerifyObjectInDirectory(listObj);
+ }
+ }
+}
+
+static int yaffs_freeVerificationFailures;
+
+void yaffs_VerifyFreeChunks(yaffs_Device *dev)
+{
+ int counted;
+ int difference;
+
+ if (yaffs_SkipVerification(dev))
+ return;
+
+ counted = yaffs_CountFreeChunks(dev);
+
+ difference = dev->nFreeChunks - counted;
+
+ if (difference) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
+ dev->nFreeChunks, counted, difference));
+ yaffs_freeVerificationFailures++;
+ }
+}
+
+int yaffs_VerifyFileSanity(yaffs_Object *in)
+{
+#if 0
+ int chunk;
+ int nChunks;
+ int fSize;
+ int failed = 0;
+ int objId;
+ yaffs_Tnode *tn;
+ yaffs_Tags localTags;
+ yaffs_Tags *tags = &localTags;
+ int theChunk;
+ int chunkDeleted;
+
+ if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
+ return YAFFS_FAIL;
+
+ objId = in->objectId;
+ fSize = in->variant.fileVariant.fileSize;
+ nChunks =
+ (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
+
+ for (chunk = 1; chunk <= nChunks; chunk++) {
+ tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
+ chunk);
+
+ if (tn) {
+
+ theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
+
+ if (yaffs_CheckChunkBits
+ (dev, theChunk / dev->param.nChunksPerBlock,
+ theChunk % dev->param.nChunksPerBlock)) {
+
+ yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
+ tags,
+ &chunkDeleted);
+ if (yaffs_TagsMatch
+ (tags, in->objectId, chunk, chunkDeleted)) {
+ /* found it; */
+
+ }
+ } else {
+
+ failed = 1;
+ }
+
+ } else {
+ /* T(("No level 0 found for %d\n", chunk)); */
+ }
+ }
+
+ return failed ? YAFFS_FAIL : YAFFS_OK;
+#else
+ in=in;
+ return YAFFS_OK;
+#endif
+}
diff -Nrup a/fs/yaffs2/yaffs_verify.h b/fs/yaffs2/yaffs_verify.h
--- a/fs/yaffs2/yaffs_verify.h 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_verify.h 2010-10-03 18:03:47.551000365 +0300
@@ -0,0 +1,39 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __YAFFS_VERIFY_H__
+#define __YAFFS_VERIFY_H__
+
+#include "yaffs_guts.h"
+
+void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n);
+void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n);
+void yaffs_VerifyBlocks(yaffs_Device *dev);
+
+void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck);
+void yaffs_VerifyFile(yaffs_Object *obj);
+void yaffs_VerifyHardLink(yaffs_Object *obj);
+void yaffs_VerifySymlink(yaffs_Object *obj);
+void yaffs_VerifySpecial(yaffs_Object *obj);
+void yaffs_VerifyObject(yaffs_Object *obj);
+void yaffs_VerifyObjects(yaffs_Device *dev);
+void yaffs_VerifyObjectInDirectory(yaffs_Object *obj);
+void yaffs_VerifyDirectory(yaffs_Object *directory);
+void yaffs_VerifyFreeChunks(yaffs_Device *dev);
+
+int yaffs_VerifyFileSanity(yaffs_Object *obj);
+
+int yaffs_SkipVerification(yaffs_Device *dev);
+
+#endif
+
diff -Nrup a/fs/yaffs2/yaffs_vfs_glue.c b/fs/yaffs2/yaffs_vfs_glue.c
--- a/fs/yaffs2/yaffs_vfs_glue.c 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_vfs_glue.c 2010-10-03 18:03:47.557000359 +0300
@@ -0,0 +1,3577 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ * Acknowledgements:
+ * Luc van OostenRyck for numerous patches.
+ * Nick Bane for numerous patches.
+ * Nick Bane for 2.5/2.6 integration.
+ * Andras Toth for mknod rdev issue.
+ * Michael Fischer for finding the problem with inode inconsistency.
+ * Some code bodily lifted from JFFS
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ *
+ * This is the file system front-end to YAFFS that hooks it up to
+ * the VFS.
+ *
+ * Special notes:
+ * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
+ * this superblock
+ * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
+ * superblock
+ * >> inode->u.generic_ip points to the associated yaffs_Object.
+ */
+
+/*
+ * There are two variants of the VFS glue code. This variant should compile
+ * for any version of Linux.
+ */
+#include <linux/version.h>
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10))
+#define YAFFS_COMPILE_BACKGROUND
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6, 23))
+#define YAFFS_COMPILE_FREEZER
+#endif
+#endif
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
+#define YAFFS_COMPILE_EXPORTFS
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35))
+#define YAFFS_USE_SETATTR_COPY
+#define YAFFS_USE_TRUNCATE_SETSIZE
+#endif
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35))
+#define YAFFS_HAS_EVICT_INODE
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
+#define YAFFS_NEW_FOLLOW_LINK 1
+#else
+#define YAFFS_NEW_FOLLOW_LINK 0
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+#include <linux/config.h>
+#endif
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/proc_fs.h>
+#include <linux/smp_lock.h>
+#include <linux/pagemap.h>
+#include <linux/mtd/mtd.h>
+#include <linux/interrupt.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+#include <linux/namei.h>
+#endif
+
+#ifdef YAFFS_COMPILE_EXPORTFS
+#include <linux/exportfs.h>
+#endif
+
+#ifdef YAFFS_COMPILE_BACKGROUND
+#include <linux/kthread.h>
+#include <linux/delay.h>
+#endif
+#ifdef YAFFS_COMPILE_FREEZER
+#include <linux/freezer.h>
+#endif
+
+#include <asm/div64.h>
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+
+#include <linux/statfs.h>
+
+#define UnlockPage(p) unlock_page(p)
+#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
+
+/* FIXME: use sb->s_id instead ? */
+#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
+
+#else
+
+#include <linux/locks.h>
+#define BDEVNAME_SIZE 0
+#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
+/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
+#define __user
+#endif
+
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
+#define YPROC_ROOT (&proc_root)
+#else
+#define YPROC_ROOT NULL
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26))
+#define Y_INIT_TIMER(a) init_timer(a)
+#else
+#define Y_INIT_TIMER(a) init_timer_on_stack(a)
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+#define WRITE_SIZE_STR "writesize"
+#define WRITE_SIZE(mtd) ((mtd)->writesize)
+#else
+#define WRITE_SIZE_STR "oobblock"
+#define WRITE_SIZE(mtd) ((mtd)->oobblock)
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
+#define YAFFS_USE_WRITE_BEGIN_END 1
+#else
+#define YAFFS_USE_WRITE_BEGIN_END 0
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
+static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
+{
+ uint64_t result = partition_size;
+ do_div(result, block_size);
+ return (uint32_t)result;
+}
+#else
+#define YCALCBLOCKS(s, b) ((s)/(b))
+#endif
+
+#include <linux/uaccess.h>
+#include <linux/mtd/mtd.h>
+
+#include "yportenv.h"
+#include "yaffs_trace.h"
+#include "yaffs_guts.h"
+
+#include "yaffs_linux.h"
+
+#include "yaffs_mtdif.h"
+#include "yaffs_mtdif1.h"
+#include "yaffs_mtdif2.h"
+
+unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS | YAFFS_TRACE_ALWAYS;
+unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
+unsigned int yaffs_auto_checkpoint = 1;
+unsigned int yaffs_gc_control = 1;
+unsigned int yaffs_bg_enable = 1;
+
+/* Module Parameters */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+module_param(yaffs_traceMask, uint, 0644);
+module_param(yaffs_wr_attempts, uint, 0644);
+module_param(yaffs_auto_checkpoint, uint, 0644);
+module_param(yaffs_gc_control, uint, 0644);
+module_param(yaffs_bg_enable, uint, 0644);
+#else
+MODULE_PARM(yaffs_traceMask, "i");
+MODULE_PARM(yaffs_wr_attempts, "i");
+MODULE_PARM(yaffs_auto_checkpoint, "i");
+MODULE_PARM(yaffs_gc_control, "i");
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
+/* use iget and read_inode */
+#define Y_IGET(sb, inum) iget((sb), (inum))
+static void yaffs_read_inode(struct inode *inode);
+
+#else
+/* Call local equivalent */
+#define YAFFS_USE_OWN_IGET
+#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
+
+static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
+#define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private)
+#else
+#define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip)
+#endif
+
+#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
+#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
+#else
+#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
+#endif
+
+
+#define update_dir_time(dir) do {\
+ (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
+ } while(0)
+
+static void yaffs_put_super(struct super_block *sb);
+
+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
+ loff_t *pos);
+static ssize_t yaffs_hold_space(struct file *f);
+static void yaffs_release_space(struct file *f);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs_file_flush(struct file *file, fl_owner_t id);
+#else
+static int yaffs_file_flush(struct file *file);
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
+static int yaffs_sync_object(struct file *file, int datasync);
+#else
+static int yaffs_sync_object(struct file *file, struct dentry *dentry,
+ int datasync);
+#endif
+
+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
+ struct nameidata *n);
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *n);
+#else
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
+#endif
+static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
+ struct dentry *dentry);
+static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
+static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
+ const char *symname);
+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+ dev_t dev);
+#else
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+ int dev);
+#endif
+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry);
+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs_sync_fs(struct super_block *sb, int wait);
+static void yaffs_write_super(struct super_block *sb);
+#else
+static int yaffs_sync_fs(struct super_block *sb);
+static int yaffs_write_super(struct super_block *sb);
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
+#else
+static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
+#endif
+
+#ifdef YAFFS_HAS_PUT_INODE
+static void yaffs_put_inode(struct inode *inode);
+#endif
+
+#ifdef YAFFS_HAS_EVICT_INODE
+static void yaffs_evict_inode(struct inode *);
+#else
+static void yaffs_delete_inode(struct inode *);
+static void yaffs_clear_inode(struct inode *);
+#endif
+
+static int yaffs_readpage(struct file *file, struct page *page);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
+#else
+static int yaffs_writepage(struct page *page);
+#endif
+
+#ifdef CONFIG_YAFFS_XATTR
+int yaffs_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags);
+ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff,
+ size_t size);
+int yaffs_removexattr(struct dentry *dentry, const char *name);
+ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size);
+#endif
+
+
+#if (YAFFS_USE_WRITE_BEGIN_END != 0)
+static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata);
+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *pg, void *fsdadata);
+#else
+static int yaffs_prepare_write(struct file *f, struct page *pg,
+ unsigned offset, unsigned to);
+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
+ unsigned to);
+
+#endif
+
+static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
+ int buflen);
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias);
+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+#else
+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+#endif
+
+static void yaffs_MarkSuperBlockDirty(yaffs_Device *dev);
+
+static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin);
+
+static int yaffs_vfs_setattr(struct inode *, struct iattr *);
+
+
+static struct address_space_operations yaffs_file_address_operations = {
+ .readpage = yaffs_readpage,
+ .writepage = yaffs_writepage,
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+ .write_begin = yaffs_write_begin,
+ .write_end = yaffs_write_end,
+#else
+ .prepare_write = yaffs_prepare_write,
+ .commit_write = yaffs_commit_write,
+#endif
+};
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
+static const struct file_operations yaffs_file_operations = {
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = generic_file_aio_write,
+ .mmap = generic_file_mmap,
+ .flush = yaffs_file_flush,
+ .fsync = yaffs_sync_object,
+ .splice_read = generic_file_splice_read,
+ .splice_write = generic_file_splice_write,
+ .llseek = generic_file_llseek,
+};
+
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
+
+static const struct file_operations yaffs_file_operations = {
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = generic_file_aio_write,
+ .mmap = generic_file_mmap,
+ .flush = yaffs_file_flush,
+ .fsync = yaffs_sync_object,
+ .sendfile = generic_file_sendfile,
+};
+
+#else
+
+static const struct file_operations yaffs_file_operations = {
+ .read = generic_file_read,
+ .write = generic_file_write,
+ .mmap = generic_file_mmap,
+ .flush = yaffs_file_flush,
+ .fsync = yaffs_sync_object,
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ .sendfile = generic_file_sendfile,
+#endif
+};
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25))
+static void zero_user_segment(struct page *page, unsigned start, unsigned end)
+{
+ void * kaddr = kmap_atomic(page, KM_USER0);
+ memset(kaddr + start, 0, end - start);
+ kunmap_atomic(kaddr, KM_USER0);
+ flush_dcache_page(page);
+}
+#endif
+
+
+static const struct inode_operations yaffs_file_inode_operations = {
+ .setattr = yaffs_setattr,
+#ifdef CONFIG_YAFFS_XATTR
+ .setxattr = yaffs_setxattr,
+ .getxattr = yaffs_getxattr,
+ .listxattr = yaffs_listxattr,
+ .removexattr = yaffs_removexattr,
+#endif
+};
+
+static const struct inode_operations yaffs_symlink_inode_operations = {
+ .readlink = yaffs_readlink,
+ .follow_link = yaffs_follow_link,
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+ .put_link = yaffs_put_link,
+#endif
+ .setattr = yaffs_setattr,
+#ifdef CONFIG_YAFFS_XATTR
+ .setxattr = yaffs_setxattr,
+ .getxattr = yaffs_getxattr,
+ .listxattr = yaffs_listxattr,
+ .removexattr = yaffs_removexattr,
+#endif
+};
+
+static const struct inode_operations yaffs_dir_inode_operations = {
+ .create = yaffs_create,
+ .lookup = yaffs_lookup,
+ .link = yaffs_link,
+ .unlink = yaffs_unlink,
+ .symlink = yaffs_symlink,
+ .mkdir = yaffs_mkdir,
+ .rmdir = yaffs_unlink,
+ .mknod = yaffs_mknod,
+ .rename = yaffs_rename,
+ .setattr = yaffs_setattr,
+#ifdef CONFIG_YAFFS_XATTR
+ .setxattr = yaffs_setxattr,
+ .getxattr = yaffs_getxattr,
+ .listxattr = yaffs_listxattr,
+ .removexattr = yaffs_removexattr,
+#endif
+};
+
+static const struct file_operations yaffs_dir_operations = {
+ .read = generic_read_dir,
+ .readdir = yaffs_readdir,
+ .fsync = yaffs_sync_object,
+ .llseek = yaffs_dir_llseek,
+};
+
+static const struct super_operations yaffs_super_ops = {
+ .statfs = yaffs_statfs,
+
+#ifndef YAFFS_USE_OWN_IGET
+ .read_inode = yaffs_read_inode,
+#endif
+#ifdef YAFFS_HAS_PUT_INODE
+ .put_inode = yaffs_put_inode,
+#endif
+ .put_super = yaffs_put_super,
+#ifdef YAFFS_HAS_EVICT_INODE
+ .evict_inode = yaffs_evict_inode,
+#else
+ .delete_inode = yaffs_delete_inode,
+ .clear_inode = yaffs_clear_inode,
+#endif
+ .sync_fs = yaffs_sync_fs,
+ .write_super = yaffs_write_super,
+};
+
+
+static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
+{
+#ifdef YAFFS_USE_SETATTR_COPY
+ setattr_copy(inode,attr);
+ return 0;
+#else
+ return inode_setattr(inode, attr);
+#endif
+
+}
+
+static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
+{
+#ifdef YAFFS_USE_TRUNCATE_SETSIZE
+ truncate_setsize(inode,newsize);
+ return 0;
+#else
+ truncate_inode_pages(&inode->i_data,newsize);
+ return 0;
+#endif
+
+}
+
+static unsigned yaffs_gc_control_callback(yaffs_Device *dev)
+{
+ return yaffs_gc_control;
+}
+
+static void yaffs_GrossLock(yaffs_Device *dev)
+{
+ T(YAFFS_TRACE_LOCK, (TSTR("yaffs locking %p\n"), current));
+ down(&(yaffs_DeviceToLC(dev)->grossLock));
+ T(YAFFS_TRACE_LOCK, (TSTR("yaffs locked %p\n"), current));
+}
+
+static void yaffs_GrossUnlock(yaffs_Device *dev)
+{
+ T(YAFFS_TRACE_LOCK, (TSTR("yaffs unlocking %p\n"), current));
+ up(&(yaffs_DeviceToLC(dev)->grossLock));
+}
+
+#ifdef YAFFS_COMPILE_EXPORTFS
+
+static struct inode *
+yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, uint32_t generation)
+{
+ return Y_IGET(sb, ino);
+}
+
+static struct dentry *
+yaffs2_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type)
+{
+ return generic_fh_to_dentry(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode) ;
+}
+
+static struct dentry *
+ yaffs2_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type)
+{
+ return generic_fh_to_parent(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode);
+}
+
+struct dentry *yaffs2_get_parent(struct dentry *dentry)
+{
+
+ struct super_block *sb = dentry->d_inode->i_sb;
+ struct dentry *parent = ERR_PTR(-ENOENT);
+ struct inode *inode;
+ unsigned long parent_ino;
+ yaffs_Object *d_obj;
+ yaffs_Object *parent_obj;
+
+ d_obj = yaffs_InodeToObject(dentry->d_inode);
+
+ if (d_obj) {
+ parent_obj = d_obj->parent;
+ if (parent_obj) {
+ parent_ino = yaffs_GetObjectInode(parent_obj);
+ inode = Y_IGET(sb, parent_ino);
+
+ if (IS_ERR(inode)) {
+ parent = ERR_CAST(inode);
+ } else {
+ parent = d_obtain_alias(inode);
+ if (!IS_ERR(parent)) {
+ parent = ERR_PTR(-ENOMEM);
+ iput(inode);
+ }
+ }
+ }
+ }
+
+ return parent;
+}
+
+/* Just declare a zero structure as a NULL value implies
+ * using the default functions of exportfs.
+ */
+
+static struct export_operations yaffs_export_ops =
+{
+ .fh_to_dentry = yaffs2_fh_to_dentry,
+ .fh_to_parent = yaffs2_fh_to_parent,
+ .get_parent = yaffs2_get_parent,
+} ;
+
+#endif
+
+/*-----------------------------------------------------------------*/
+/* Directory search context allows us to unlock access to yaffs during
+ * filldir without causing problems with the directory being modified.
+ * This is similar to the tried and tested mechanism used in yaffs direct.
+ *
+ * A search context iterates along a doubly linked list of siblings in the
+ * directory. If the iterating object is deleted then this would corrupt
+ * the list iteration, likely causing a crash. The search context avoids
+ * this by using the removeObjectCallback to move the search context to the
+ * next object before the object is deleted.
+ *
+ * Many readdirs (and thus seach conexts) may be alive simulateously so
+ * each yaffs_Device has a list of these.
+ *
+ * A seach context lives for the duration of a readdir.
+ *
+ * All these functions must be called while yaffs is locked.
+ */
+
+struct yaffs_SearchContext {
+ yaffs_Device *dev;
+ yaffs_Object *dirObj;
+ yaffs_Object *nextReturn;
+ struct ylist_head others;
+};
+
+/*
+ * yaffs_NewSearch() creates a new search context, initialises it and
+ * adds it to the device's search context list.
+ *
+ * Called at start of readdir.
+ */
+static struct yaffs_SearchContext * yaffs_NewSearch(yaffs_Object *dir)
+{
+ yaffs_Device *dev = dir->myDev;
+ struct yaffs_SearchContext *sc = YMALLOC(sizeof(struct yaffs_SearchContext));
+ if(sc){
+ sc->dirObj = dir;
+ sc->dev = dev;
+ if( ylist_empty(&sc->dirObj->variant.directoryVariant.children))
+ sc->nextReturn = NULL;
+ else
+ sc->nextReturn = ylist_entry(
+ dir->variant.directoryVariant.children.next,
+ yaffs_Object,siblings);
+ YINIT_LIST_HEAD(&sc->others);
+ ylist_add(&sc->others,&(yaffs_DeviceToLC(dev)->searchContexts));
+ }
+ return sc;
+}
+
+/*
+ * yaffs_EndSearch() disposes of a search context and cleans up.
+ */
+static void yaffs_EndSearch(struct yaffs_SearchContext * sc)
+{
+ if(sc){
+ ylist_del(&sc->others);
+ YFREE(sc);
+ }
+}
+
+/*
+ * yaffs_SearchAdvance() moves a search context to the next object.
+ * Called when the search iterates or when an object removal causes
+ * the search context to be moved to the next object.
+ */
+static void yaffs_SearchAdvance(struct yaffs_SearchContext *sc)
+{
+ if(!sc)
+ return;
+
+ if( sc->nextReturn == NULL ||
+ ylist_empty(&sc->dirObj->variant.directoryVariant.children))
+ sc->nextReturn = NULL;
+ else {
+ struct ylist_head *next = sc->nextReturn->siblings.next;
+
+ if( next == &sc->dirObj->variant.directoryVariant.children)
+ sc->nextReturn = NULL; /* end of list */
+ else
+ sc->nextReturn = ylist_entry(next,yaffs_Object,siblings);
+ }
+}
+
+/*
+ * yaffs_RemoveObjectCallback() is called when an object is unlinked.
+ * We check open search contexts and advance any which are currently
+ * on the object being iterated.
+ */
+static void yaffs_RemoveObjectCallback(yaffs_Object *obj)
+{
+
+ struct ylist_head *i;
+ struct yaffs_SearchContext *sc;
+ struct ylist_head *search_contexts = &(yaffs_DeviceToLC(obj->myDev)->searchContexts);
+
+
+ /* Iterate through the directory search contexts.
+ * If any are currently on the object being removed, then advance
+ * the search context to the next object to prevent a hanging pointer.
+ */
+ ylist_for_each(i, search_contexts) {
+ if (i) {
+ sc = ylist_entry(i, struct yaffs_SearchContext,others);
+ if(sc->nextReturn == obj)
+ yaffs_SearchAdvance(sc);
+ }
+ }
+
+}
+
+
+/*-----------------------------------------------------------------*/
+
+static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
+ int buflen)
+{
+ unsigned char *alias;
+ int ret;
+
+ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+
+ yaffs_GrossLock(dev);
+
+ alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
+
+ yaffs_GrossUnlock(dev);
+
+ if (!alias)
+ return -ENOMEM;
+
+ ret = vfs_readlink(dentry, buffer, buflen, alias);
+ kfree(alias);
+ return ret;
+}
+
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+#else
+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+#endif
+{
+ unsigned char *alias;
+ int ret;
+ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+
+ yaffs_GrossLock(dev);
+
+ alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
+ yaffs_GrossUnlock(dev);
+
+ if (!alias) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+ nd_set_link(nd, alias);
+ ret = (int)alias;
+out:
+ return ERR_PTR(ret);
+#else
+ ret = vfs_follow_link(nd, alias);
+ kfree(alias);
+out:
+ return ret;
+#endif
+}
+
+#if (YAFFS_NEW_FOLLOW_LINK == 1)
+void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias) {
+ kfree(alias);
+}
+#endif
+
+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
+ yaffs_Object *obj);
+
+/*
+ * Lookup is used to find objects in the fs
+ */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *n)
+#else
+static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
+#endif
+{
+ yaffs_Object *obj;
+ struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
+
+ yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
+
+ if(current != yaffs_DeviceToLC(dev)->readdirProcess)
+ yaffs_GrossLock(dev);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_lookup for %d:%s\n"),
+ yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
+
+ obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),
+ dentry->d_name.name);
+
+ obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
+
+ /* Can't hold gross lock when calling yaffs_get_inode() */
+ if(current != yaffs_DeviceToLC(dev)->readdirProcess)
+ yaffs_GrossUnlock(dev);
+
+ if (obj) {
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_lookup found %d\n"), obj->objectId));
+
+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+
+ if (inode) {
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_loookup dentry \n")));
+/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
+ * d_add even if NULL inode */
+#if 0
+ /*dget(dentry); // try to solve directory bug */
+ d_add(dentry, inode);
+
+ /* return dentry; */
+ return NULL;
+#endif
+ }
+
+ } else {
+ T(YAFFS_TRACE_OS,(TSTR("yaffs_lookup not found\n")));
+
+ }
+
+/* added NCB for 2.5/6 compatability - forces add even if inode is
+ * NULL which creates dentry hash */
+ d_add(dentry, inode);
+
+ return NULL;
+}
+
+
+#ifdef YAFFS_HAS_PUT_INODE
+
+/* For now put inode is just for debugging
+ * Put inode is called when the inode **structure** is put.
+ */
+static void yaffs_put_inode(struct inode *inode)
+{
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_put_inode: ino %d, count %d\n"), (int)inode->i_ino,
+ atomic_read(&inode->i_count)));
+
+}
+#endif
+
+
+static void yaffs_UnstitchObject(struct inode *inode, yaffs_Object *obj)
+{
+ /* Clear the association between the inode and
+ * the yaffs_Object.
+ */
+ obj->myInode = NULL;
+ yaffs_InodeToObjectLV(inode) = NULL;
+
+ /* If the object freeing was deferred, then the real
+ * free happens now.
+ * This should fix the inode inconsistency problem.
+ */
+ yaffs_HandleDeferedFree(obj);
+}
+
+#ifdef YAFFS_HAS_EVICT_INODE
+/* yaffs_evict_inode combines into one operation what was previously done in
+ * yaffs_clear_inode() and yaffs_delete_inode()
+ *
+ */
+static void yaffs_evict_inode( struct inode *inode)
+{
+ yaffs_Object *obj;
+ yaffs_Device *dev;
+ int deleteme = 0;
+
+ obj = yaffs_InodeToObject(inode);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_evict_inode: ino %d, count %d %s\n"), (int)inode->i_ino,
+ atomic_read(&inode->i_count),
+ obj ? "object exists" : "null object"));
+
+ if (!inode->i_nlink && !is_bad_inode(inode))
+ deleteme = 1;
+ truncate_inode_pages(&inode->i_data,0);
+ end_writeback(inode);
+
+ if(deleteme && obj){
+ dev = obj->myDev;
+ yaffs_GrossLock(dev);
+ yaffs_DeleteObject(obj);
+ yaffs_GrossUnlock(dev);
+ }
+ if (obj) {
+ dev = obj->myDev;
+ yaffs_GrossLock(dev);
+ yaffs_UnstitchObject(inode,obj);
+ yaffs_GrossUnlock(dev);
+ }
+
+
+}
+#else
+
+/* clear is called to tell the fs to release any per-inode data it holds.
+ * The object might still exist on disk and is just being thrown out of the cache
+ * or else the object has actually been deleted and we're being called via
+ * the chain
+ * yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
+ */
+
+static void yaffs_clear_inode(struct inode *inode)
+{
+ yaffs_Object *obj;
+ yaffs_Device *dev;
+
+ obj = yaffs_InodeToObject(inode);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_clear_inode: ino %d, count %d %s\n"), (int)inode->i_ino,
+ atomic_read(&inode->i_count),
+ obj ? "object exists" : "null object"));
+
+ if (obj) {
+ dev = obj->myDev;
+ yaffs_GrossLock(dev);
+ yaffs_UnstitchObject(inode,obj);
+ yaffs_GrossUnlock(dev);
+ }
+
+}
+
+/* delete is called when the link count is zero and the inode
+ * is put (ie. nobody wants to know about it anymore, time to
+ * delete the file).
+ * NB Must call clear_inode()
+ */
+static void yaffs_delete_inode(struct inode *inode)
+{
+ yaffs_Object *obj = yaffs_InodeToObject(inode);
+ yaffs_Device *dev;
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_delete_inode: ino %d, count %d %s\n"), (int)inode->i_ino,
+ atomic_read(&inode->i_count),
+ obj ? "object exists" : "null object"));
+
+ if (obj) {
+ dev = obj->myDev;
+ yaffs_GrossLock(dev);
+ yaffs_DeleteObject(obj);
+ yaffs_GrossUnlock(dev);
+ }
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+ truncate_inode_pages(&inode->i_data, 0);
+#endif
+ clear_inode(inode);
+}
+#endif
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs_file_flush(struct file *file, fl_owner_t id)
+#else
+static int yaffs_file_flush(struct file *file)
+#endif
+{
+ yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
+
+ yaffs_Device *dev = obj->myDev;
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_file_flush object %d (%s)\n"), obj->objectId,
+ obj->dirty ? "dirty" : "clean"));
+
+ yaffs_GrossLock(dev);
+
+ yaffs_FlushFile(obj, 1, 0);
+
+ yaffs_GrossUnlock(dev);
+
+ return 0;
+}
+
+static int yaffs_readpage_nolock(struct file *f, struct page *pg)
+{
+ /* Lifted from jffs2 */
+
+ yaffs_Object *obj;
+ unsigned char *pg_buf;
+ int ret;
+
+ yaffs_Device *dev;
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_readpage_nolock at %08x, size %08x\n"),
+ (unsigned)(pg->index << PAGE_CACHE_SHIFT),
+ (unsigned)PAGE_CACHE_SIZE));
+
+ obj = yaffs_DentryToObject(f->f_dentry);
+
+ dev = obj->myDev;
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ BUG_ON(!PageLocked(pg));
+#else
+ if (!PageLocked(pg))
+ PAGE_BUG(pg);
+#endif
+
+ pg_buf = kmap(pg);
+ /* FIXME: Can kmap fail? */
+
+ yaffs_GrossLock(dev);
+
+ ret = yaffs_ReadDataFromFile(obj, pg_buf,
+ pg->index << PAGE_CACHE_SHIFT,
+ PAGE_CACHE_SIZE);
+
+ yaffs_GrossUnlock(dev);
+
+ if (ret >= 0)
+ ret = 0;
+
+ if (ret) {
+ ClearPageUptodate(pg);
+ SetPageError(pg);
+ } else {
+ SetPageUptodate(pg);
+ ClearPageError(pg);
+ }
+
+ flush_dcache_page(pg);
+ kunmap(pg);
+
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage_nolock done\n")));
+ return ret;
+}
+
+static int yaffs_readpage_unlock(struct file *f, struct page *pg)
+{
+ int ret = yaffs_readpage_nolock(f, pg);
+ UnlockPage(pg);
+ return ret;
+}
+
+static int yaffs_readpage(struct file *f, struct page *pg)
+{
+ int ret;
+
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage\n")));
+ ret=yaffs_readpage_unlock(f, pg);
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage done\n")));
+ return ret;
+}
+
+/* writepage inspired by/stolen from smbfs */
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
+#else
+static int yaffs_writepage(struct page *page)
+#endif
+{
+ yaffs_Device *dev;
+ struct address_space *mapping = page->mapping;
+ struct inode *inode;
+ unsigned long end_index;
+ char *buffer;
+ yaffs_Object *obj;
+ int nWritten = 0;
+ unsigned nBytes;
+ loff_t i_size;
+
+ if (!mapping)
+ BUG();
+ inode = mapping->host;
+ if (!inode)
+ BUG();
+ i_size = i_size_read(inode);
+
+ end_index = i_size >> PAGE_CACHE_SHIFT;
+
+ if(page->index < end_index)
+ nBytes = PAGE_CACHE_SIZE;
+ else {
+ nBytes = i_size & (PAGE_CACHE_SIZE -1);
+
+ if (page->index > end_index || !nBytes) {
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_writepage at %08x, inode size = %08x!!!\n"),
+ (unsigned)(page->index << PAGE_CACHE_SHIFT),
+ (unsigned)inode->i_size));
+ T(YAFFS_TRACE_OS,
+ (TSTR(" -> don't care!!\n")));
+
+ zero_user_segment(page,0,PAGE_CACHE_SIZE);
+ set_page_writeback(page);
+ unlock_page(page);
+ end_page_writeback(page);
+ return 0;
+ }
+ }
+
+ if(nBytes != PAGE_CACHE_SIZE)
+ zero_user_segment(page,nBytes,PAGE_CACHE_SIZE);
+
+ get_page(page);
+
+ buffer = kmap(page);
+
+ obj = yaffs_InodeToObject(inode);
+ dev = obj->myDev;
+ yaffs_GrossLock(dev);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_writepage at %08x, size %08x\n"),
+ (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
+ T(YAFFS_TRACE_OS,
+ (TSTR("writepag0: obj = %05x, ino = %05x\n"),
+ (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
+
+ nWritten = yaffs_WriteDataToFile(obj, buffer,
+ page->index << PAGE_CACHE_SHIFT, nBytes, 0);
+
+ yaffs_MarkSuperBlockDirty(dev);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("writepag1: obj = %05x, ino = %05x\n"),
+ (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
+
+ yaffs_GrossUnlock(dev);
+
+ kunmap(page);
+ set_page_writeback(page);
+ unlock_page(page);
+ end_page_writeback(page);
+ put_page(page);
+
+ return (nWritten == nBytes) ? 0 : -ENOSPC;
+}
+
+
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
+{
+ struct page *pg = NULL;
+ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+
+ int ret = 0;
+ int space_held = 0;
+
+ /* Get a page */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
+ pg = grab_cache_page_write_begin(mapping, index, flags);
+#else
+ pg = __grab_cache_page(mapping, index);
+#endif
+
+ *pagep = pg;
+ if (!pg) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ T(YAFFS_TRACE_OS,
+ (TSTR("start yaffs_write_begin index %d(%x) uptodate %d\n"),
+ (int)index,(int)index,Page_Uptodate(pg) ? 1 : 0));
+
+ /* Get fs space */
+ space_held = yaffs_hold_space(filp);
+
+ if (!space_held) {
+ ret = -ENOSPC;
+ goto out;
+ }
+
+ /* Update page if required */
+
+ if (!Page_Uptodate(pg))
+ ret = yaffs_readpage_nolock(filp, pg);
+
+ if (ret)
+ goto out;
+
+ /* Happy path return */
+ T(YAFFS_TRACE_OS, (TSTR("end yaffs_write_begin - ok\n")));
+
+ return 0;
+
+out:
+ T(YAFFS_TRACE_OS,
+ (TSTR("end yaffs_write_begin fail returning %d\n"), ret));
+ if (space_held)
+ yaffs_release_space(filp);
+ if (pg) {
+ unlock_page(pg);
+ page_cache_release(pg);
+ }
+ return ret;
+}
+
+#else
+
+static int yaffs_prepare_write(struct file *f, struct page *pg,
+ unsigned offset, unsigned to)
+{
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_prepair_write\n")));
+
+ if (!Page_Uptodate(pg))
+ return yaffs_readpage_nolock(f, pg);
+ return 0;
+}
+#endif
+
+#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *pg, void *fsdadata)
+{
+ int ret = 0;
+ void *addr, *kva;
+ uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
+
+ kva = kmap(pg);
+ addr = kva + offset_into_page;
+
+ T(YAFFS_TRACE_OS,
+ ("yaffs_write_end addr %p pos %x nBytes %d\n",
+ addr,(unsigned)pos, copied));
+
+ ret = yaffs_file_write(filp, addr, copied, &pos);
+
+ if (ret != copied) {
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_write_end not same size ret %d copied %d\n"),
+ ret, copied));
+ SetPageError(pg);
+ } else {
+ /* Nothing */
+ }
+
+ kunmap(pg);
+
+ yaffs_release_space(filp);
+ unlock_page(pg);
+ page_cache_release(pg);
+ return ret;
+}
+#else
+
+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
+ unsigned to)
+{
+ void *addr, *kva;
+
+ loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
+ int nBytes = to - offset;
+ int nWritten;
+
+ unsigned spos = pos;
+ unsigned saddr;
+
+ kva = kmap(pg);
+ addr = kva + offset;
+
+ saddr = (unsigned) addr;
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_commit_write addr %x pos %x nBytes %d\n"),
+ saddr, spos, nBytes));
+
+ nWritten = yaffs_file_write(f, addr, nBytes, &pos);
+
+ if (nWritten != nBytes) {
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_commit_write not same size nWritten %d nBytes %d\n"),
+ nWritten, nBytes));
+ SetPageError(pg);
+ } else {
+ /* Nothing */
+ }
+
+ kunmap(pg);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_commit_write returning %d\n"),
+ nWritten == nBytes ? 0 : nWritten));
+
+ return nWritten == nBytes ? 0 : nWritten;
+}
+#endif
+
+
+static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
+{
+ if (inode && obj) {
+
+
+ /* Check mode against the variant type and attempt to repair if broken. */
+ __u32 mode = obj->yst_mode;
+ switch (obj->variantType) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ if (!S_ISREG(mode)) {
+ obj->yst_mode &= ~S_IFMT;
+ obj->yst_mode |= S_IFREG;
+ }
+
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ if (!S_ISLNK(mode)) {
+ obj->yst_mode &= ~S_IFMT;
+ obj->yst_mode |= S_IFLNK;
+ }
+
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ if (!S_ISDIR(mode)) {
+ obj->yst_mode &= ~S_IFMT;
+ obj->yst_mode |= S_IFDIR;
+ }
+
+ break;
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ default:
+ /* TODO? */
+ break;
+ }
+
+ inode->i_flags |= S_NOATIME;
+
+ inode->i_ino = obj->objectId;
+ inode->i_mode = obj->yst_mode;
+ inode->i_uid = obj->yst_uid;
+ inode->i_gid = obj->yst_gid;
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+ inode->i_blksize = inode->i_sb->s_blocksize;
+#endif
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+
+ inode->i_rdev = old_decode_dev(obj->yst_rdev);
+ inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
+ inode->i_atime.tv_nsec = 0;
+ inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
+ inode->i_mtime.tv_nsec = 0;
+ inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
+ inode->i_ctime.tv_nsec = 0;
+#else
+ inode->i_rdev = obj->yst_rdev;
+ inode->i_atime = obj->yst_atime;
+ inode->i_mtime = obj->yst_mtime;
+ inode->i_ctime = obj->yst_ctime;
+#endif
+ inode->i_size = yaffs_GetObjectFileLength(obj);
+ inode->i_blocks = (inode->i_size + 511) >> 9;
+
+ inode->i_nlink = yaffs_GetObjectLinkCount(obj);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n"),
+ inode->i_mode, inode->i_uid, inode->i_gid,
+ (int)inode->i_size, atomic_read(&inode->i_count)));
+
+ switch (obj->yst_mode & S_IFMT) {
+ default: /* fifo, device or socket */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ init_special_inode(inode, obj->yst_mode,
+ old_decode_dev(obj->yst_rdev));
+#else
+ init_special_inode(inode, obj->yst_mode,
+ (dev_t) (obj->yst_rdev));
+#endif
+ break;
+ case S_IFREG: /* file */
+ inode->i_op = &yaffs_file_inode_operations;
+ inode->i_fop = &yaffs_file_operations;
+ inode->i_mapping->a_ops =
+ &yaffs_file_address_operations;
+ break;
+ case S_IFDIR: /* directory */
+ inode->i_op = &yaffs_dir_inode_operations;
+ inode->i_fop = &yaffs_dir_operations;
+ break;
+ case S_IFLNK: /* symlink */
+ inode->i_op = &yaffs_symlink_inode_operations;
+ break;
+ }
+
+ yaffs_InodeToObjectLV(inode) = obj;
+
+ obj->myInode = inode;
+
+ } else {
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_FileInode invalid parameters\n")));
+ }
+
+}
+
+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
+ yaffs_Object *obj)
+{
+ struct inode *inode;
+
+ if (!sb) {
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_get_inode for NULL super_block!!\n")));
+ return NULL;
+
+ }
+
+ if (!obj) {
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_get_inode for NULL object!!\n")));
+ return NULL;
+
+ }
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_get_inode for object %d\n"), obj->objectId));
+
+ inode = Y_IGET(sb, obj->objectId);
+ if (IS_ERR(inode))
+ return NULL;
+
+ /* NB Side effect: iget calls back to yaffs_read_inode(). */
+ /* iget also increments the inode's i_count */
+ /* NB You can't be holding grossLock or deadlock will happen! */
+
+ return inode;
+}
+
+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
+ loff_t *pos)
+{
+ yaffs_Object *obj;
+ int nWritten, ipos;
+ struct inode *inode;
+ yaffs_Device *dev;
+
+ obj = yaffs_DentryToObject(f->f_dentry);
+
+ dev = obj->myDev;
+
+ yaffs_GrossLock(dev);
+
+ inode = f->f_dentry->d_inode;
+
+ if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
+ ipos = inode->i_size;
+ else
+ ipos = *pos;
+
+ if (!obj)
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_file_write: hey obj is null!\n")));
+ else
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_file_write about to write writing %u(%x) bytes"
+ "to object %d at %d(%x)\n"),
+ (unsigned) n, (unsigned) n, obj->objectId, ipos,ipos));
+
+ nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
+
+ yaffs_MarkSuperBlockDirty(dev);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_file_write: %d(%x) bytes written\n"),
+ (unsigned )n,(unsigned)n));
+
+ if (nWritten > 0) {
+ ipos += nWritten;
+ *pos = ipos;
+ if (ipos > inode->i_size) {
+ inode->i_size = ipos;
+ inode->i_blocks = (ipos + 511) >> 9;
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_file_write size updated to %d bytes, "
+ "%d blocks\n"),
+ ipos, (int)(inode->i_blocks)));
+ }
+
+ }
+ yaffs_GrossUnlock(dev);
+ return (nWritten == 0) && (n > 0) ? -ENOSPC : nWritten;
+}
+
+/* Space holding and freeing is done to ensure we have space available for write_begin/end */
+/* For now we just assume few parallel writes and check against a small number. */
+/* Todo: need to do this with a counter to handle parallel reads better */
+
+static ssize_t yaffs_hold_space(struct file *f)
+{
+ yaffs_Object *obj;
+ yaffs_Device *dev;
+
+ int nFreeChunks;
+
+
+ obj = yaffs_DentryToObject(f->f_dentry);
+
+ dev = obj->myDev;
+
+ yaffs_GrossLock(dev);
+
+ nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
+
+ yaffs_GrossUnlock(dev);
+
+ return (nFreeChunks > 20) ? 1 : 0;
+}
+
+static void yaffs_release_space(struct file *f)
+{
+ yaffs_Object *obj;
+ yaffs_Device *dev;
+
+
+ obj = yaffs_DentryToObject(f->f_dentry);
+
+ dev = obj->myDev;
+
+ yaffs_GrossLock(dev);
+
+
+ yaffs_GrossUnlock(dev);
+}
+
+
+static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin)
+{
+ long long retval;
+
+ lock_kernel();
+
+ switch (origin){
+ case 2:
+ offset += i_size_read(file->f_path.dentry->d_inode);
+ break;
+ case 1:
+ offset += file->f_pos;
+ }
+ retval = -EINVAL;
+
+ if (offset >= 0){
+ if (offset != file->f_pos)
+ file->f_pos = offset;
+
+ retval = offset;
+ }
+ unlock_kernel();
+ return retval;
+}
+
+
+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
+{
+ yaffs_Object *obj;
+ yaffs_Device *dev;
+ struct yaffs_SearchContext *sc;
+ struct inode *inode = f->f_dentry->d_inode;
+ unsigned long offset, curoffs;
+ yaffs_Object *l;
+ int retVal = 0;
+
+ char name[YAFFS_MAX_NAME_LENGTH + 1];
+
+ obj = yaffs_DentryToObject(f->f_dentry);
+ dev = obj->myDev;
+
+ yaffs_GrossLock(dev);
+
+ yaffs_DeviceToLC(dev)->readdirProcess = current;
+
+ offset = f->f_pos;
+
+ sc = yaffs_NewSearch(obj);
+ if(!sc){
+ retVal = -ENOMEM;
+ goto out;
+ }
+
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_readdir: starting at %d\n"), (int)offset));
+
+ if (offset == 0) {
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_readdir: entry . ino %d \n"),
+ (int)inode->i_ino));
+ yaffs_GrossUnlock(dev);
+ if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0){
+ yaffs_GrossLock(dev);
+ goto out;
+ }
+ yaffs_GrossLock(dev);
+ offset++;
+ f->f_pos++;
+ }
+ if (offset == 1) {
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_readdir: entry .. ino %d \n"),
+ (int)f->f_dentry->d_parent->d_inode->i_ino));
+ yaffs_GrossUnlock(dev);
+ if (filldir(dirent, "..", 2, offset,
+ f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0){
+ yaffs_GrossLock(dev);
+ goto out;
+ }
+ yaffs_GrossLock(dev);
+ offset++;
+ f->f_pos++;
+ }
+
+ curoffs = 1;
+
+ /* If the directory has changed since the open or last call to
+ readdir, rewind to after the 2 canned entries. */
+ if (f->f_version != inode->i_version) {
+ offset = 2;
+ f->f_pos = offset;
+ f->f_version = inode->i_version;
+ }
+
+ while(sc->nextReturn){
+ curoffs++;
+ l = sc->nextReturn;
+ if (curoffs >= offset) {
+ int this_inode = yaffs_GetObjectInode(l);
+ int this_type = yaffs_GetObjectType(l);
+
+ yaffs_GetObjectName(l, name,
+ YAFFS_MAX_NAME_LENGTH + 1);
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_readdir: %s inode %d\n"),
+ name, yaffs_GetObjectInode(l)));
+
+ yaffs_GrossUnlock(dev);
+
+ if (filldir(dirent,
+ name,
+ strlen(name),
+ offset,
+ this_inode,
+ this_type) < 0){
+ yaffs_GrossLock(dev);
+ goto out;
+ }
+
+ yaffs_GrossLock(dev);
+
+ offset++;
+ f->f_pos++;
+ }
+ yaffs_SearchAdvance(sc);
+ }
+
+out:
+ yaffs_EndSearch(sc);
+ yaffs_DeviceToLC(dev)->readdirProcess = NULL;
+ yaffs_GrossUnlock(dev);
+
+ return retVal;
+}
+
+
+
+/*
+ * File creation. Allocate an inode, and we're done..
+ */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+#define YCRED(x) x
+#else
+#define YCRED(x) (x->cred)
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+ dev_t rdev)
+#else
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+ int rdev)
+#endif
+{
+ struct inode *inode;
+
+ yaffs_Object *obj = NULL;
+ yaffs_Device *dev;
+
+ yaffs_Object *parent = yaffs_InodeToObject(dir);
+
+ int error = -ENOSPC;
+ uid_t uid = YCRED(current)->fsuid;
+ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
+
+ if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
+ mode |= S_ISGID;
+
+ if (parent) {
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_mknod: parent object %d type %d\n"),
+ parent->objectId, parent->variantType));
+ } else {
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_mknod: could not get parent object\n")));
+ return -EPERM;
+ }
+
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making oject for %s, "
+ "mode %x dev %x\n"),
+ dentry->d_name.name, mode, rdev));
+
+ dev = parent->myDev;
+
+ yaffs_GrossLock(dev);
+
+ switch (mode & S_IFMT) {
+ default:
+ /* Special (socket, fifo, device...) */
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making special\n")));
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
+ gid, old_encode_dev(rdev));
+#else
+ obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
+ gid, rdev);
+#endif
+ break;
+ case S_IFREG: /* file */
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making file\n")));
+ obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
+ gid);
+ break;
+ case S_IFDIR: /* directory */
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_mknod: making directory\n")));
+ obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
+ uid, gid);
+ break;
+ case S_IFLNK: /* symlink */
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making symlink\n")));
+ obj = NULL; /* Do we ever get here? */
+ break;
+ }
+
+ /* Can not call yaffs_get_inode() with gross lock held */
+ yaffs_GrossUnlock(dev);
+
+ if (obj) {
+ inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
+ d_instantiate(dentry, inode);
+ update_dir_time(dir);
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_mknod created object %d count = %d\n"),
+ obj->objectId, atomic_read(&inode->i_count)));
+ error = 0;
+ yaffs_FillInodeFromObject(dir,parent);
+ } else {
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_mknod failed making object\n")));
+ error = -ENOMEM;
+ }
+
+ return error;
+}
+
+static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+{
+ int retVal;
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_mkdir\n")));
+ retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
+ return retVal;
+}
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
+ struct nameidata *n)
+#else
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
+#endif
+{
+ T(YAFFS_TRACE_OS,(TSTR("yaffs_create\n")));
+ return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
+}
+
+static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
+{
+ int retVal;
+
+ yaffs_Device *dev;
+ yaffs_Object *obj;
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_unlink %d:%s\n"),
+ (int)(dir->i_ino),
+ dentry->d_name.name));
+ obj = yaffs_InodeToObject(dir);
+ dev = obj->myDev;
+
+ yaffs_GrossLock(dev);
+
+ retVal = yaffs_Unlink(obj, dentry->d_name.name);
+
+ if (retVal == YAFFS_OK) {
+ dentry->d_inode->i_nlink--;
+ dir->i_version++;
+ yaffs_GrossUnlock(dev);
+ mark_inode_dirty(dentry->d_inode);
+ update_dir_time(dir);
+ return 0;
+ }
+ yaffs_GrossUnlock(dev);
+ return -ENOTEMPTY;
+}
+
+/*
+ * Create a link...
+ */
+static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
+ struct dentry *dentry)
+{
+ struct inode *inode = old_dentry->d_inode;
+ yaffs_Object *obj = NULL;
+ yaffs_Object *link = NULL;
+ yaffs_Device *dev;
+
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_link\n")));
+
+ obj = yaffs_InodeToObject(inode);
+ dev = obj->myDev;
+
+ yaffs_GrossLock(dev);
+
+ if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
+ link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
+ obj);
+
+ if (link) {
+ old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
+ d_instantiate(dentry, old_dentry->d_inode);
+ atomic_inc(&old_dentry->d_inode->i_count);
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_link link count %d i_count %d\n"),
+ old_dentry->d_inode->i_nlink,
+ atomic_read(&old_dentry->d_inode->i_count)));
+ }
+
+ yaffs_GrossUnlock(dev);
+
+ if (link){
+ update_dir_time(dir);
+ return 0;
+ }
+
+ return -EPERM;
+}
+
+static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
+ const char *symname)
+{
+ yaffs_Object *obj;
+ yaffs_Device *dev;
+ uid_t uid = YCRED(current)->fsuid;
+ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
+
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_symlink\n")));
+
+ dev = yaffs_InodeToObject(dir)->myDev;
+ yaffs_GrossLock(dev);
+ obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
+ S_IFLNK | S_IRWXUGO, uid, gid, symname);
+ yaffs_GrossUnlock(dev);
+
+ if (obj) {
+ struct inode *inode;
+
+ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+ d_instantiate(dentry, inode);
+ update_dir_time(dir);
+ T(YAFFS_TRACE_OS, (TSTR("symlink created OK\n")));
+ return 0;
+ } else {
+ T(YAFFS_TRACE_OS, (TSTR("symlink not created\n")));
+ }
+
+ return -ENOMEM;
+}
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
+static int yaffs_sync_object(struct file *file, int datasync)
+#else
+static int yaffs_sync_object(struct file *file, struct dentry *dentry,
+ int datasync)
+#endif
+{
+
+ yaffs_Object *obj;
+ yaffs_Device *dev;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
+ struct dentry *dentry = file->f_path.dentry;
+#endif
+
+ obj = yaffs_DentryToObject(dentry);
+
+ dev = obj->myDev;
+
+ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
+ (TSTR("yaffs_sync_object\n")));
+ yaffs_GrossLock(dev);
+ yaffs_FlushFile(obj, 1, datasync);
+ yaffs_GrossUnlock(dev);
+ return 0;
+}
+
+/*
+ * The VFS layer already does all the dentry stuff for rename.
+ *
+ * NB: POSIX says you can rename an object over an old object of the same name
+ */
+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ yaffs_Device *dev;
+ int retVal = YAFFS_FAIL;
+ yaffs_Object *target;
+
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_rename\n")));
+ dev = yaffs_InodeToObject(old_dir)->myDev;
+
+ yaffs_GrossLock(dev);
+
+ /* Check if the target is an existing directory that is not empty. */
+ target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
+ new_dentry->d_name.name);
+
+
+
+ if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+ !ylist_empty(&target->variant.directoryVariant.children)) {
+
+ T(YAFFS_TRACE_OS, (TSTR("target is non-empty dir\n")));
+
+ retVal = YAFFS_FAIL;
+ } else {
+ /* Now does unlinking internally using shadowing mechanism */
+ T(YAFFS_TRACE_OS, (TSTR("calling yaffs_RenameObject\n")));
+
+ retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),
+ old_dentry->d_name.name,
+ yaffs_InodeToObject(new_dir),
+ new_dentry->d_name.name);
+ }
+ yaffs_GrossUnlock(dev);
+
+ if (retVal == YAFFS_OK) {
+ if (target) {
+ new_dentry->d_inode->i_nlink--;
+ mark_inode_dirty(new_dentry->d_inode);
+ }
+
+ update_dir_time(old_dir);
+ if(old_dir != new_dir)
+ update_dir_time(new_dir);
+ return 0;
+ } else {
+ return -ENOTEMPTY;
+ }
+}
+
+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *inode = dentry->d_inode;
+ int error = 0;
+ yaffs_Device *dev;
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_setattr of object %d\n"),
+ yaffs_InodeToObject(inode)->objectId));
+
+ /* Fail if a requested resize >= 2GB */
+ if (attr->ia_valid & ATTR_SIZE &&
+ (attr->ia_size >> 31))
+ error = -EINVAL;
+
+ if (error == 0)
+ error = inode_change_ok(inode, attr);
+ if (error == 0) {
+ int result;
+ if (!error){
+ error = yaffs_vfs_setattr(inode, attr);
+ T(YAFFS_TRACE_OS,(TSTR("inode_setattr called\n")));
+ if (attr->ia_valid & ATTR_SIZE){
+ yaffs_vfs_setsize(inode,attr->ia_size);
+ inode->i_blocks = (inode->i_size + 511) >> 9;
+ }
+ }
+ dev = yaffs_InodeToObject(inode)->myDev;
+ if (attr->ia_valid & ATTR_SIZE){
+ T(YAFFS_TRACE_OS,(TSTR("resize to %d(%x)\n"),
+ (int)(attr->ia_size),(int)(attr->ia_size)));
+ }
+ yaffs_GrossLock(dev);
+ result = yaffs_SetAttributes(yaffs_InodeToObject(inode), attr);
+ if(result == YAFFS_OK) {
+ error = 0;
+ } else {
+ error = -EPERM;
+ }
+ yaffs_GrossUnlock(dev);
+
+ }
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_setattr done returning %d\n"),error));
+
+ return error;
+}
+
+#ifdef CONFIG_YAFFS_XATTR
+int yaffs_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
+{
+ struct inode *inode = dentry->d_inode;
+ int error = 0;
+ yaffs_Device *dev;
+ yaffs_Object *obj = yaffs_InodeToObject(inode);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_setxattr of object %d\n"),
+ obj->objectId));
+
+
+ if (error == 0) {
+ int result;
+ dev = obj->myDev;
+ yaffs_GrossLock(dev);
+ result = yaffs_SetXAttribute(obj, name, value, size, flags);
+ if(result == YAFFS_OK)
+ error = 0;
+ else if(result < 0)
+ error = result;
+ yaffs_GrossUnlock(dev);
+
+ }
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_setxattr done returning %d\n"),error));
+
+ return error;
+}
+
+
+ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff,
+ size_t size)
+{
+ struct inode *inode = dentry->d_inode;
+ int error = 0;
+ yaffs_Device *dev;
+ yaffs_Object *obj = yaffs_InodeToObject(inode);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_getxattr \"%s\" from object %d\n"),
+ name, obj->objectId));
+
+ if (error == 0) {
+ dev = obj->myDev;
+ yaffs_GrossLock(dev);
+ error = yaffs_GetXAttribute(obj, name, buff, size);
+ yaffs_GrossUnlock(dev);
+
+ }
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_getxattr done returning %d\n"),error));
+
+ return error;
+}
+
+int yaffs_removexattr(struct dentry *dentry, const char *name)
+{
+ struct inode *inode = dentry->d_inode;
+ int error = 0;
+ yaffs_Device *dev;
+ yaffs_Object *obj = yaffs_InodeToObject(inode);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_removexattr of object %d\n"),
+ obj->objectId));
+
+
+ if (error == 0) {
+ int result;
+ dev = obj->myDev;
+ yaffs_GrossLock(dev);
+ result = yaffs_RemoveXAttribute(obj, name);
+ if(result == YAFFS_OK)
+ error = 0;
+ else if(result < 0)
+ error = result;
+ yaffs_GrossUnlock(dev);
+
+ }
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_removexattr done returning %d\n"),error));
+
+ return error;
+}
+
+ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size)
+{
+ struct inode *inode = dentry->d_inode;
+ int error = 0;
+ yaffs_Device *dev;
+ yaffs_Object *obj = yaffs_InodeToObject(inode);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_listxattr of object %d\n"),
+ obj->objectId));
+
+
+ if (error == 0) {
+ dev = obj->myDev;
+ yaffs_GrossLock(dev);
+ error = yaffs_ListXAttributes(obj, buff, size);
+ yaffs_GrossUnlock(dev);
+
+ }
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_listxattr done returning %d\n"),error));
+
+ return error;
+}
+
+#endif
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+ struct super_block *sb = dentry->d_sb;
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
+{
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+#else
+static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
+{
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+#endif
+
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_statfs\n")));
+
+ yaffs_GrossLock(dev);
+
+ buf->f_type = YAFFS_MAGIC;
+ buf->f_bsize = sb->s_blocksize;
+ buf->f_namelen = 255;
+
+ if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) {
+ /* Do this if chunk size is not a power of 2 */
+
+ uint64_t bytesInDev;
+ uint64_t bytesFree;
+
+ bytesInDev = ((uint64_t)((dev->param.endBlock - dev->param.startBlock + 1))) *
+ ((uint64_t)(dev->param.nChunksPerBlock * dev->nDataBytesPerChunk));
+
+ do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
+ buf->f_blocks = bytesInDev;
+
+ bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
+ ((uint64_t)(dev->nDataBytesPerChunk));
+
+ do_div(bytesFree, sb->s_blocksize);
+
+ buf->f_bfree = bytesFree;
+
+ } else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
+
+ buf->f_blocks =
+ (dev->param.endBlock - dev->param.startBlock + 1) *
+ dev->param.nChunksPerBlock /
+ (sb->s_blocksize / dev->nDataBytesPerChunk);
+ buf->f_bfree =
+ yaffs_GetNumberOfFreeChunks(dev) /
+ (sb->s_blocksize / dev->nDataBytesPerChunk);
+ } else {
+ buf->f_blocks =
+ (dev->param.endBlock - dev->param.startBlock + 1) *
+ dev->param.nChunksPerBlock *
+ (dev->nDataBytesPerChunk / sb->s_blocksize);
+
+ buf->f_bfree =
+ yaffs_GetNumberOfFreeChunks(dev) *
+ (dev->nDataBytesPerChunk / sb->s_blocksize);
+ }
+
+ buf->f_files = 0;
+ buf->f_ffree = 0;
+ buf->f_bavail = buf->f_bfree;
+
+ yaffs_GrossUnlock(dev);
+ return 0;
+}
+
+
+
+static void yaffs_FlushInodes(struct super_block *sb)
+{
+ struct inode *iptr;
+ yaffs_Object *obj;
+
+ list_for_each_entry(iptr,&sb->s_inodes, i_sb_list){
+ obj = yaffs_InodeToObject(iptr);
+ if(obj){
+ T(YAFFS_TRACE_OS, (TSTR("flushing obj %d\n"),
+ obj->objectId));
+ yaffs_FlushFile(obj,1,0);
+ }
+ }
+}
+
+
+static void yaffs_FlushSuperBlock(struct super_block *sb, int do_checkpoint)
+{
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+ if(!dev)
+ return;
+
+ yaffs_FlushInodes(sb);
+ yaffs_UpdateDirtyDirectories(dev);
+ yaffs_FlushEntireDeviceCache(dev);
+ if(do_checkpoint)
+ yaffs_CheckpointSave(dev);
+}
+
+
+static unsigned yaffs_bg_gc_urgency(yaffs_Device *dev)
+{
+ unsigned erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
+ struct yaffs_LinuxContext *context = yaffs_DeviceToLC(dev);
+ unsigned scatteredFree = 0; /* Free chunks not in an erased block */
+
+ if(erasedChunks < dev->nFreeChunks)
+ scatteredFree = (dev->nFreeChunks - erasedChunks);
+
+ if(!context->bgRunning)
+ return 0;
+ else if(scatteredFree < (dev->param.nChunksPerBlock * 2))
+ return 0;
+ else if(erasedChunks > dev->nFreeChunks/2)
+ return 0;
+ else if(erasedChunks > dev->nFreeChunks/4)
+ return 1;
+ else
+ return 2;
+}
+
+static int yaffs_do_sync_fs(struct super_block *sb,
+ int request_checkpoint)
+{
+
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+ unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
+ unsigned gc_urgent = yaffs_bg_gc_urgency(dev);
+ int do_checkpoint;
+
+ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
+ (TSTR("yaffs_do_sync_fs: gc-urgency %d %s %s%s\n"),
+ gc_urgent,
+ sb->s_dirt ? "dirty" : "clean",
+ request_checkpoint ? "checkpoint requested" : "no checkpoint",
+ oneshot_checkpoint ? " one-shot" : "" ));
+
+ yaffs_GrossLock(dev);
+ do_checkpoint = ((request_checkpoint && !gc_urgent) ||
+ oneshot_checkpoint) &&
+ !dev->isCheckpointed;
+
+ if (sb->s_dirt || do_checkpoint) {
+ yaffs_FlushSuperBlock(sb, !dev->isCheckpointed && do_checkpoint);
+ sb->s_dirt = 0;
+ if(oneshot_checkpoint)
+ yaffs_auto_checkpoint &= ~4;
+ }
+ yaffs_GrossUnlock(dev);
+
+ return 0;
+}
+
+/*
+ * yaffs background thread functions .
+ * yaffs_BackgroundThread() the thread function
+ * yaffs_BackgroundStart() launches the background thread.
+ * yaffs_BackgroundStop() cleans up the background thread.
+ *
+ * NB:
+ * The thread should only run after the yaffs is initialised
+ * The thread should be stopped before yaffs is unmounted.
+ * The thread should not do any writing while the fs is in read only.
+ */
+
+#ifdef YAFFS_COMPILE_BACKGROUND
+
+void yaffs_background_waker(unsigned long data)
+{
+ wake_up_process((struct task_struct *)data);
+}
+
+static int yaffs_BackgroundThread(void *data)
+{
+ yaffs_Device *dev = (yaffs_Device *)data;
+ struct yaffs_LinuxContext *context = yaffs_DeviceToLC(dev);
+ unsigned long now = jiffies;
+ unsigned long next_dir_update = now;
+ unsigned long next_gc = now;
+ unsigned long expires;
+ unsigned int urgency;
+
+ int gcResult;
+ struct timer_list timer;
+
+ T(YAFFS_TRACE_BACKGROUND,
+ (TSTR("yaffs_background starting for dev %p\n"),
+ (void *)dev));
+
+#ifdef YAFFS_COMPILE_FREEZER
+ set_freezable();
+#endif
+ while(context->bgRunning){
+ T(YAFFS_TRACE_BACKGROUND,
+ (TSTR("yaffs_background\n")));
+
+ if(kthread_should_stop())
+ break;
+
+#ifdef YAFFS_COMPILE_FREEZER
+ if(try_to_freeze())
+ continue;
+#endif
+ yaffs_GrossLock(dev);
+
+ now = jiffies;
+
+ if(time_after(now, next_dir_update) && yaffs_bg_enable){
+ yaffs_UpdateDirtyDirectories(dev);
+ next_dir_update = now + HZ;
+ }
+
+ if(time_after(now,next_gc) && yaffs_bg_enable){
+ if(!dev->isCheckpointed){
+ urgency = yaffs_bg_gc_urgency(dev);
+ gcResult = yaffs_BackgroundGarbageCollect(dev, urgency);
+ if(urgency > 1)
+ next_gc = now + HZ/20+1;
+ else if(urgency > 0)
+ next_gc = now + HZ/10+1;
+ else
+ next_gc = now + HZ * 2;
+ } else /*
+ * gc not running so set to next_dir_update
+ * to cut down on wake ups
+ */
+ next_gc = next_dir_update;
+ }
+ yaffs_GrossUnlock(dev);
+#if 1
+ expires = next_dir_update;
+ if (time_before(next_gc,expires))
+ expires = next_gc;
+ if(time_before(expires,now))
+ expires = now + HZ;
+
+ Y_INIT_TIMER(&timer);
+ timer.expires = expires+1;
+ timer.data = (unsigned long) current;
+ timer.function = yaffs_background_waker;
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_timer(&timer);
+ schedule();
+ del_timer_sync(&timer);
+#else
+ msleep(10);
+#endif
+ }
+
+ return 0;
+}
+
+static int yaffs_BackgroundStart(yaffs_Device *dev)
+{
+ int retval = 0;
+ struct yaffs_LinuxContext *context = yaffs_DeviceToLC(dev);
+
+ if(dev->readOnly)
+ return -1;
+
+ context->bgRunning = 1;
+
+ context->bgThread = kthread_run(yaffs_BackgroundThread,
+ (void *)dev,"yaffs-bg-%d",context->mount_id);
+
+ if(IS_ERR(context->bgThread)){
+ retval = PTR_ERR(context->bgThread);
+ context->bgThread = NULL;
+ context->bgRunning = 0;
+ }
+ return retval;
+}
+
+static void yaffs_BackgroundStop(yaffs_Device *dev)
+{
+ struct yaffs_LinuxContext *ctxt = yaffs_DeviceToLC(dev);
+
+ ctxt->bgRunning = 0;
+
+ if( ctxt->bgThread){
+ kthread_stop(ctxt->bgThread);
+ ctxt->bgThread = NULL;
+ }
+}
+#else
+static int yaffs_BackgroundThread(void *data)
+{
+ return 0;
+}
+
+static int yaffs_BackgroundStart(yaffs_Device *dev)
+{
+ return 0;
+}
+
+static void yaffs_BackgroundStop(yaffs_Device *dev)
+{
+}
+#endif
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static void yaffs_write_super(struct super_block *sb)
+#else
+static int yaffs_write_super(struct super_block *sb)
+#endif
+{
+ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2);
+
+ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
+ (TSTR("yaffs_write_super%s\n"),
+ request_checkpoint ? " checkpt" : ""));
+
+ yaffs_do_sync_fs(sb, request_checkpoint);
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
+ return 0;
+#endif
+}
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs_sync_fs(struct super_block *sb, int wait)
+#else
+static int yaffs_sync_fs(struct super_block *sb)
+#endif
+{
+ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1);
+
+ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
+ (TSTR("yaffs_sync_fs%s\n"),
+ request_checkpoint ? " checkpt" : ""));
+
+ yaffs_do_sync_fs(sb, request_checkpoint);
+
+ return 0;
+}
+
+#ifdef YAFFS_USE_OWN_IGET
+
+static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
+{
+ struct inode *inode;
+ yaffs_Object *obj;
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_iget for %lu\n"), ino));
+
+ inode = iget_locked(sb, ino);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ return inode;
+
+ /* NB This is called as a side effect of other functions, but
+ * we had to release the lock to prevent deadlocks, so
+ * need to lock again.
+ */
+
+ yaffs_GrossLock(dev);
+
+ obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
+
+ yaffs_FillInodeFromObject(inode, obj);
+
+ yaffs_GrossUnlock(dev);
+
+ unlock_new_inode(inode);
+ return inode;
+}
+
+#else
+
+static void yaffs_read_inode(struct inode *inode)
+{
+ /* NB This is called as a side effect of other functions, but
+ * we had to release the lock to prevent deadlocks, so
+ * need to lock again.
+ */
+
+ yaffs_Object *obj;
+ yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_read_inode for %d\n"), (int)inode->i_ino));
+
+ if(current != yaffs_DeviceToLC(dev)->readdirProcess)
+ yaffs_GrossLock(dev);
+
+ obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
+
+ yaffs_FillInodeFromObject(inode, obj);
+
+ if(current != yaffs_DeviceToLC(dev)->readdirProcess)
+ yaffs_GrossUnlock(dev);
+}
+
+#endif
+
+static YLIST_HEAD(yaffs_context_list);
+struct semaphore yaffs_context_lock;
+
+static void yaffs_put_super(struct super_block *sb)
+{
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_put_super\n")));
+
+ T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
+ (TSTR("Shutting down yaffs background thread\n")));
+ yaffs_BackgroundStop(dev);
+ T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
+ (TSTR("yaffs background thread shut down\n")));
+
+ yaffs_GrossLock(dev);
+
+ yaffs_FlushSuperBlock(sb,1);
+
+ if (yaffs_DeviceToLC(dev)->putSuperFunc)
+ yaffs_DeviceToLC(dev)->putSuperFunc(sb);
+
+
+ yaffs_Deinitialise(dev);
+
+ yaffs_GrossUnlock(dev);
+
+ down(&yaffs_context_lock);
+ ylist_del_init(&(yaffs_DeviceToLC(dev)->contextList));
+ up(&yaffs_context_lock);
+
+ if (yaffs_DeviceToLC(dev)->spareBuffer) {
+ YFREE(yaffs_DeviceToLC(dev)->spareBuffer);
+ yaffs_DeviceToLC(dev)->spareBuffer = NULL;
+ }
+
+ kfree(dev);
+}
+
+
+static void yaffs_MTDPutSuper(struct super_block *sb)
+{
+ struct mtd_info *mtd = yaffs_DeviceToMtd(yaffs_SuperToDevice(sb));
+
+ if (mtd->sync)
+ mtd->sync(mtd);
+
+ put_mtd_device(mtd);
+}
+
+
+static void yaffs_MarkSuperBlockDirty(yaffs_Device *dev)
+{
+ struct super_block *sb = yaffs_DeviceToLC(dev)->superBlock;
+
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_MarkSuperBlockDirty() sb = %p\n"), sb));
+ if (sb)
+ sb->s_dirt = 1;
+}
+
+typedef struct {
+ int inband_tags;
+ int skip_checkpoint_read;
+ int skip_checkpoint_write;
+ int no_cache;
+ int tags_ecc_on;
+ int tags_ecc_overridden;
+ int lazy_loading_enabled;
+ int lazy_loading_overridden;
+ int empty_lost_and_found;
+ int empty_lost_and_found_overridden;
+} yaffs_options;
+
+#define MAX_OPT_LEN 30
+static int yaffs_parse_options(yaffs_options *options, const char *options_str)
+{
+ char cur_opt[MAX_OPT_LEN + 1];
+ int p;
+ int error = 0;
+
+ /* Parse through the options which is a comma seperated list */
+
+ while (options_str && *options_str && !error) {
+ memset(cur_opt, 0, MAX_OPT_LEN + 1);
+ p = 0;
+
+ while(*options_str == ',')
+ options_str++;
+
+ while (*options_str && *options_str != ',') {
+ if (p < MAX_OPT_LEN) {
+ cur_opt[p] = *options_str;
+ p++;
+ }
+ options_str++;
+ }
+
+ if (!strcmp(cur_opt, "inband-tags"))
+ options->inband_tags = 1;
+ else if (!strcmp(cur_opt, "tags-ecc-off")){
+ options->tags_ecc_on = 0;
+ options->tags_ecc_overridden=1;
+ } else if (!strcmp(cur_opt, "tags-ecc-on")){
+ options->tags_ecc_on = 1;
+ options->tags_ecc_overridden = 1;
+ } else if (!strcmp(cur_opt, "lazy-loading-off")){
+ options->lazy_loading_enabled = 0;
+ options->lazy_loading_overridden=1;
+ } else if (!strcmp(cur_opt, "lazy-loading-on")){
+ options->lazy_loading_enabled = 1;
+ options->lazy_loading_overridden = 1;
+ } else if (!strcmp(cur_opt, "empty-lost-and-found-off")){
+ options->empty_lost_and_found = 0;
+ options->empty_lost_and_found_overridden=1;
+ } else if (!strcmp(cur_opt, "empty-lost-and-found-on")){
+ options->empty_lost_and_found = 1;
+ options->empty_lost_and_found_overridden=1;
+ } else if (!strcmp(cur_opt, "no-cache"))
+ options->no_cache = 1;
+ else if (!strcmp(cur_opt, "no-checkpoint-read"))
+ options->skip_checkpoint_read = 1;
+ else if (!strcmp(cur_opt, "no-checkpoint-write"))
+ options->skip_checkpoint_write = 1;
+ else if (!strcmp(cur_opt, "no-checkpoint")) {
+ options->skip_checkpoint_read = 1;
+ options->skip_checkpoint_write = 1;
+ } else {
+ printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
+ cur_opt);
+ error = 1;
+ }
+ }
+
+ return error;
+}
+
+static struct super_block *yaffs_internal_read_super(int yaffsVersion,
+ struct super_block *sb,
+ void *data, int silent)
+{
+ int nBlocks;
+ struct inode *inode = NULL;
+ struct dentry *root;
+ yaffs_Device *dev = 0;
+ char devname_buf[BDEVNAME_SIZE + 1];
+ struct mtd_info *mtd;
+ int err;
+ char *data_str = (char *)data;
+ struct yaffs_LinuxContext *context = NULL;
+ yaffs_DeviceParam *param;
+
+ int readOnly = 0;
+
+ yaffs_options options;
+
+ unsigned mount_id;
+ int found;
+ struct yaffs_LinuxContext *context_iterator;
+ struct ylist_head *l;
+
+ sb->s_magic = YAFFS_MAGIC;
+ sb->s_op = &yaffs_super_ops;
+ sb->s_flags |= MS_NOATIME;
+
+ readOnly =((sb->s_flags & MS_RDONLY) != 0);
+
+
+#ifdef YAFFS_COMPILE_EXPORTFS
+ sb->s_export_op = &yaffs_export_ops;
+#endif
+
+ if (!sb)
+ printk(KERN_INFO "yaffs: sb is NULL\n");
+ else if (!sb->s_dev)
+ printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
+ else if (!yaffs_devname(sb, devname_buf))
+ printk(KERN_INFO "yaffs: devname is NULL\n");
+ else
+ printk(KERN_INFO "yaffs: dev is %d name is \"%s\" %s\n",
+ sb->s_dev,
+ yaffs_devname(sb, devname_buf),
+ readOnly ? "ro" : "rw");
+
+ if (!data_str)
+ data_str = "";
+
+ printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
+
+ memset(&options, 0, sizeof(options));
+
+ if (yaffs_parse_options(&options, data_str)) {
+ /* Option parsing failed */
+ return NULL;
+ }
+
+
+ sb->s_blocksize = PAGE_CACHE_SIZE;
+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_read_super: Using yaffs%d\n"), yaffsVersion));
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_read_super: block size %d\n"),
+ (int)(sb->s_blocksize)));
+
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: Attempting MTD mount of %u.%u,\"%s\"\n"),
+ MAJOR(sb->s_dev), MINOR(sb->s_dev),
+ yaffs_devname(sb, devname_buf)));
+
+ /* Check it's an mtd device..... */
+ if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
+ return NULL; /* This isn't an mtd device */
+
+ /* Get the device */
+ mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
+ if (!mtd) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: MTD device #%u doesn't appear to exist\n"),
+ MINOR(sb->s_dev)));
+ return NULL;
+ }
+ /* Check it's NAND */
+ if (mtd->type != MTD_NANDFLASH) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: MTD device is not NAND it's type %d\n"),
+ mtd->type));
+ return NULL;
+ }
+
+ T(YAFFS_TRACE_OS, (TSTR(" erase %p\n"), mtd->erase));
+ T(YAFFS_TRACE_OS, (TSTR(" read %p\n"), mtd->read));
+ T(YAFFS_TRACE_OS, (TSTR(" write %p\n"), mtd->write));
+ T(YAFFS_TRACE_OS, (TSTR(" readoob %p\n"), mtd->read_oob));
+ T(YAFFS_TRACE_OS, (TSTR(" writeoob %p\n"), mtd->write_oob));
+ T(YAFFS_TRACE_OS, (TSTR(" block_isbad %p\n"), mtd->block_isbad));
+ T(YAFFS_TRACE_OS, (TSTR(" block_markbad %p\n"), mtd->block_markbad));
+ T(YAFFS_TRACE_OS, (TSTR(" %s %d\n"), WRITE_SIZE_STR, WRITE_SIZE(mtd)));
+ T(YAFFS_TRACE_OS, (TSTR(" oobsize %d\n"), mtd->oobsize));
+ T(YAFFS_TRACE_OS, (TSTR(" erasesize %d\n"), mtd->erasesize));
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+ T(YAFFS_TRACE_OS, (TSTR(" size %u\n"), mtd->size));
+#else
+ T(YAFFS_TRACE_OS, (TSTR(" size %lld\n"), mtd->size));
+#endif
+
+#ifdef CONFIG_YAFFS_AUTO_YAFFS2
+
+ if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: auto selecting yaffs2\n")));
+ yaffsVersion = 2;
+ }
+
+ /* Added NCB 26/5/2006 for completeness */
+ if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: auto selecting yaffs1\n")));
+ yaffsVersion = 1;
+ }
+
+#endif
+
+ if (yaffsVersion == 2) {
+ /* Check for version 2 style functions */
+ if (!mtd->erase ||
+ !mtd->block_isbad ||
+ !mtd->block_markbad ||
+ !mtd->read ||
+ !mtd->write ||
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+ !mtd->read_oob || !mtd->write_oob) {
+#else
+ !mtd->write_ecc ||
+ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
+#endif
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: MTD device does not support required "
+ "functions\n")));
+ return NULL;
+ }
+
+ if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
+ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
+ !options.inband_tags) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: MTD device does not have the "
+ "right page sizes\n")));
+ return NULL;
+ }
+ } else {
+ /* Check for V1 style functions */
+ if (!mtd->erase ||
+ !mtd->read ||
+ !mtd->write ||
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+ !mtd->read_oob || !mtd->write_oob) {
+#else
+ !mtd->write_ecc ||
+ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
+#endif
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: MTD device does not support required "
+ "functions\n")));
+ return NULL;
+ }
+
+ if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
+ mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: MTD device does not support have the "
+ "right page sizes\n")));
+ return NULL;
+ }
+ }
+
+ /* OK, so if we got here, we have an MTD that's NAND and looks
+ * like it has the right capabilities
+ * Set the yaffs_Device up for mtd
+ */
+
+ if (!readOnly && !(mtd->flags & MTD_WRITEABLE)){
+ readOnly = 1;
+ printk(KERN_INFO "yaffs: mtd is read only, setting superblock read only");
+ sb->s_flags |= MS_RDONLY;
+ }
+
+ dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
+ context = kmalloc(sizeof(struct yaffs_LinuxContext),GFP_KERNEL);
+
+ if(!dev || !context ){
+ if(dev)
+ kfree(dev);
+ if(context)
+ kfree(context);
+ dev = NULL;
+ context = NULL;
+ }
+
+ if (!dev) {
+ /* Deep shit could not allocate device structure */
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs_read_super: Failed trying to allocate "
+ "yaffs_Device. \n")));
+ return NULL;
+ }
+ memset(dev, 0, sizeof(yaffs_Device));
+ param = &(dev->param);
+
+ memset(context,0,sizeof(struct yaffs_LinuxContext));
+ dev->osContext = context;
+ YINIT_LIST_HEAD(&(context->contextList));
+ context->dev = dev;
+ context->superBlock = sb;
+
+ dev->readOnly = readOnly;
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ sb->s_fs_info = dev;
+#else
+ sb->u.generic_sbp = dev;
+#endif
+
+ dev->driverContext = mtd;
+ param->name = mtd->name;
+
+ /* Set up the memory size parameters.... */
+
+ nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
+
+ param->startBlock = 0;
+ param->endBlock = nBlocks - 1;
+ param->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
+ param->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+ param->nReservedBlocks = 5;
+ param->nShortOpCaches = (options.no_cache) ? 0 : 10;
+ param->inbandTags = options.inband_tags;
+
+#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
+ param->disableLazyLoad = 1;
+#endif
+#ifdef CONFIG_YAFFS_XATTR
+ param->enableXattr = 1;
+#endif
+ if(options.lazy_loading_overridden)
+ param->disableLazyLoad = !options.lazy_loading_enabled;
+
+#ifdef CONFIG_YAFFS_DISABLE_TAGS_ECC
+ param->noTagsECC = 1;
+#endif
+
+#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND
+#else
+ param->deferDirectoryUpdate = 1;
+#endif
+
+ if(options.tags_ecc_overridden)
+ param->noTagsECC = !options.tags_ecc_on;
+
+#ifdef CONFIG_YAFFS_EMPTY_LOST_AND_FOUND
+ param->emptyLostAndFound = 1;
+#endif
+
+#ifdef CONFIG_YAFFS_DISABLE_BLOCK_REFRESHING
+ param->refreshPeriod = 0;
+#else
+ param->refreshPeriod = 500;
+#endif
+
+#ifdef CONFIG_YAFFS__ALWAYS_CHECK_CHUNK_ERASED
+ param->alwaysCheckErased = 1;
+#endif
+
+ if(options.empty_lost_and_found_overridden)
+ param->emptyLostAndFound = options.empty_lost_and_found;
+
+ /* ... and the functions. */
+ if (yaffsVersion == 2) {
+ param->writeChunkWithTagsToNAND =
+ nandmtd2_WriteChunkWithTagsToNAND;
+ param->readChunkWithTagsFromNAND =
+ nandmtd2_ReadChunkWithTagsFromNAND;
+ param->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
+ param->queryNANDBlock = nandmtd2_QueryNANDBlock;
+ yaffs_DeviceToLC(dev)->spareBuffer = YMALLOC(mtd->oobsize);
+ param->isYaffs2 = 1;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+ param->totalBytesPerChunk = mtd->writesize;
+ param->nChunksPerBlock = mtd->erasesize / mtd->writesize;
+#else
+ param->totalBytesPerChunk = mtd->oobblock;
+ param->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
+#endif
+ nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
+
+ param->startBlock = 0;
+ param->endBlock = nBlocks - 1;
+ } else {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+ /* use the MTD interface in yaffs_mtdif1.c */
+ param->writeChunkWithTagsToNAND =
+ nandmtd1_WriteChunkWithTagsToNAND;
+ param->readChunkWithTagsFromNAND =
+ nandmtd1_ReadChunkWithTagsFromNAND;
+ param->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
+ param->queryNANDBlock = nandmtd1_QueryNANDBlock;
+#else
+ param->writeChunkToNAND = nandmtd_WriteChunkToNAND;
+ param->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
+#endif
+ param->isYaffs2 = 0;
+ }
+ /* ... and common functions */
+ param->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
+ param->initialiseNAND = nandmtd_InitialiseNAND;
+
+ yaffs_DeviceToLC(dev)->putSuperFunc = yaffs_MTDPutSuper;
+
+ param->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
+ param->gcControl = yaffs_gc_control_callback;
+
+ yaffs_DeviceToLC(dev)->superBlock= sb;
+
+
+#ifndef CONFIG_YAFFS_DOES_ECC
+ param->useNANDECC = 1;
+#endif
+
+#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
+ param->wideTnodesDisabled = 1;
+#endif
+
+ param->skipCheckpointRead = options.skip_checkpoint_read;
+ param->skipCheckpointWrite = options.skip_checkpoint_write;
+
+ down(&yaffs_context_lock);
+ /* Get a mount id */
+ found = 0;
+ for(mount_id=0; ! found; mount_id++){
+ found = 1;
+ ylist_for_each(l,&yaffs_context_list){
+ context_iterator = ylist_entry(l,struct yaffs_LinuxContext,contextList);
+ if(context_iterator->mount_id == mount_id)
+ found = 0;
+ }
+ }
+ context->mount_id = mount_id;
+
+ ylist_add_tail(&(yaffs_DeviceToLC(dev)->contextList), &yaffs_context_list);
+ up(&yaffs_context_lock);
+
+ /* Directory search handling...*/
+ YINIT_LIST_HEAD(&(yaffs_DeviceToLC(dev)->searchContexts));
+ param->removeObjectCallback = yaffs_RemoveObjectCallback;
+
+ init_MUTEX(&(yaffs_DeviceToLC(dev)->grossLock));
+
+ yaffs_GrossLock(dev);
+
+ err = yaffs_GutsInitialise(dev);
+
+ T(YAFFS_TRACE_OS,
+ (TSTR("yaffs_read_super: guts initialised %s\n"),
+ (err == YAFFS_OK) ? "OK" : "FAILED"));
+
+ if(err == YAFFS_OK)
+ yaffs_BackgroundStart(dev);
+
+ if(!context->bgThread)
+ param->deferDirectoryUpdate = 0;
+
+
+ /* Release lock before yaffs_get_inode() */
+ yaffs_GrossUnlock(dev);
+
+ /* Create root inode */
+ if (err == YAFFS_OK)
+ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
+ yaffs_Root(dev));
+
+ if (!inode)
+ return NULL;
+
+ inode->i_op = &yaffs_dir_inode_operations;
+ inode->i_fop = &yaffs_dir_operations;
+
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: got root inode\n")));
+
+ root = d_alloc_root(inode);
+
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: d_alloc_root done\n")));
+
+ if (!root) {
+ iput(inode);
+ return NULL;
+ }
+ sb->s_root = root;
+ sb->s_dirt = !dev->isCheckpointed;
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs_read_super: isCheckpointed %d\n"),
+ dev->isCheckpointed));
+
+ T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: done\n")));
+ return sb;
+}
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
+ int silent)
+{
+ return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
+}
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs_read_super(struct file_system_type *fs,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
+{
+
+ return get_sb_bdev(fs, flags, dev_name, data,
+ yaffs_internal_read_super_mtd, mnt);
+}
+#else
+static struct super_block *yaffs_read_super(struct file_system_type *fs,
+ int flags, const char *dev_name,
+ void *data)
+{
+
+ return get_sb_bdev(fs, flags, dev_name, data,
+ yaffs_internal_read_super_mtd);
+}
+#endif
+
+static struct file_system_type yaffs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "yaffs",
+ .get_sb = yaffs_read_super,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV,
+};
+#else
+static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
+ int silent)
+{
+ return yaffs_internal_read_super(1, sb, data, silent);
+}
+
+static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
+ FS_REQUIRES_DEV);
+#endif
+
+
+#ifdef CONFIG_YAFFS_YAFFS2
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
+ int silent)
+{
+ return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
+}
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs2_read_super(struct file_system_type *fs,
+ int flags, const char *dev_name, void *data,
+ struct vfsmount *mnt)
+{
+ return get_sb_bdev(fs, flags, dev_name, data,
+ yaffs2_internal_read_super_mtd, mnt);
+}
+#else
+static struct super_block *yaffs2_read_super(struct file_system_type *fs,
+ int flags, const char *dev_name,
+ void *data)
+{
+
+ return get_sb_bdev(fs, flags, dev_name, data,
+ yaffs2_internal_read_super_mtd);
+}
+#endif
+
+static struct file_system_type yaffs2_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "yaffs2",
+ .get_sb = yaffs2_read_super,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV,
+};
+#else
+static struct super_block *yaffs2_read_super(struct super_block *sb,
+ void *data, int silent)
+{
+ return yaffs_internal_read_super(2, sb, data, silent);
+}
+
+static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
+ FS_REQUIRES_DEV);
+#endif
+
+#endif /* CONFIG_YAFFS_YAFFS2 */
+
+static struct proc_dir_entry *my_proc_entry;
+static struct proc_dir_entry *debug_proc_entry;
+
+static char *yaffs_dump_dev_part0(char *buf, yaffs_Device * dev)
+{
+ buf += sprintf(buf, "startBlock......... %d\n", dev->param.startBlock);
+ buf += sprintf(buf, "endBlock........... %d\n", dev->param.endBlock);
+ buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->param.totalBytesPerChunk);
+ buf += sprintf(buf, "useNANDECC......... %d\n", dev->param.useNANDECC);
+ buf += sprintf(buf, "noTagsECC.......... %d\n", dev->param.noTagsECC);
+ buf += sprintf(buf, "isYaffs2........... %d\n", dev->param.isYaffs2);
+ buf += sprintf(buf, "inbandTags......... %d\n", dev->param.inbandTags);
+ buf += sprintf(buf, "emptyLostAndFound.. %d\n", dev->param.emptyLostAndFound);
+ buf += sprintf(buf, "disableLazyLoad.... %d\n", dev->param.disableLazyLoad);
+ buf += sprintf(buf, "refreshPeriod...... %d\n", dev->param.refreshPeriod);
+ buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->param.nShortOpCaches);
+ buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->param.nReservedBlocks);
+ buf += sprintf(buf, "alwaysCheckErased.. %d\n", dev->param.alwaysCheckErased);
+
+ buf += sprintf(buf, "\n");
+
+ return buf;
+}
+
+
+static char *yaffs_dump_dev_part1(char *buf, yaffs_Device * dev)
+{
+ buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
+ buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
+ buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
+ buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
+ buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
+ buf += sprintf(buf, "\n");
+ buf += sprintf(buf, "nTnodes............ %d\n", dev->nTnodes);
+ buf += sprintf(buf, "nObjects........... %d\n", dev->nObjects);
+ buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
+ buf += sprintf(buf, "\n");
+ buf += sprintf(buf, "nPageWrites........ %u\n", dev->nPageWrites);
+ buf += sprintf(buf, "nPageReads......... %u\n", dev->nPageReads);
+ buf += sprintf(buf, "nBlockErasures..... %u\n", dev->nBlockErasures);
+ buf += sprintf(buf, "nGCCopies.......... %u\n", dev->nGCCopies);
+ buf += sprintf(buf, "allGCs............. %u\n", dev->allGCs);
+ buf += sprintf(buf, "passiveGCs......... %u\n", dev->passiveGCs);
+ buf += sprintf(buf, "oldestDirtyGCs..... %u\n", dev->oldestDirtyGCs);
+ buf += sprintf(buf, "nGCBlocks.......... %u\n", dev->nGCBlocks);
+ buf += sprintf(buf, "backgroundGCs...... %u\n", dev->backgroundGCs);
+ buf += sprintf(buf, "nRetriedWrites..... %u\n", dev->nRetriedWrites);
+ buf += sprintf(buf, "nRetireBlocks...... %u\n", dev->nRetiredBlocks);
+ buf += sprintf(buf, "eccFixed........... %u\n", dev->eccFixed);
+ buf += sprintf(buf, "eccUnfixed......... %u\n", dev->eccUnfixed);
+ buf += sprintf(buf, "tagsEccFixed....... %u\n", dev->tagsEccFixed);
+ buf += sprintf(buf, "tagsEccUnfixed..... %u\n", dev->tagsEccUnfixed);
+ buf += sprintf(buf, "cacheHits.......... %u\n", dev->cacheHits);
+ buf += sprintf(buf, "nDeletedFiles...... %u\n", dev->nDeletedFiles);
+ buf += sprintf(buf, "nUnlinkedFiles..... %u\n", dev->nUnlinkedFiles);
+ buf += sprintf(buf, "refreshCount....... %u\n", dev->refreshCount);
+ buf +=
+ sprintf(buf, "nBackgroudDeletions %u\n", dev->nBackgroundDeletions);
+
+ return buf;
+}
+
+static int yaffs_proc_read(char *page,
+ char **start,
+ off_t offset, int count, int *eof, void *data)
+{
+ struct ylist_head *item;
+ char *buf = page;
+ int step = offset;
+ int n = 0;
+
+ /* Get proc_file_read() to step 'offset' by one on each sucessive call.
+ * We use 'offset' (*ppos) to indicate where we are in devList.
+ * This also assumes the user has posted a read buffer large
+ * enough to hold the complete output; but that's life in /proc.
+ */
+
+ *(int *)start = 1;
+
+ /* Print header first */
+ if (step == 0)
+ buf += sprintf(buf, "Multi-version YAFFS built:" __DATE__ " " __TIME__"\n");
+ else if (step == 1)
+ buf += sprintf(buf,"\n");
+ else {
+ step-=2;
+
+ down(&yaffs_context_lock);
+
+ /* Locate and print the Nth entry. Order N-squared but N is small. */
+ ylist_for_each(item, &yaffs_context_list) {
+ struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList);
+ yaffs_Device *dev = dc->dev;
+
+ if (n < (step & ~1)) {
+ n+=2;
+ continue;
+ }
+ if((step & 1)==0){
+ buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->param.name);
+ buf = yaffs_dump_dev_part0(buf, dev);
+ } else
+ buf = yaffs_dump_dev_part1(buf, dev);
+
+ break;
+ }
+ up(&yaffs_context_lock);
+ }
+
+ return buf - page < count ? buf - page : count;
+}
+
+static int yaffs_stats_proc_read(char *page,
+ char **start,
+ off_t offset, int count, int *eof, void *data)
+{
+ struct ylist_head *item;
+ char *buf = page;
+ int n = 0;
+
+ down(&yaffs_context_lock);
+
+ /* Locate and print the Nth entry. Order N-squared but N is small. */
+ ylist_for_each(item, &yaffs_context_list) {
+ struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList);
+ yaffs_Device *dev = dc->dev;
+
+ int erasedChunks;
+
+ erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
+
+ buf += sprintf(buf,"%d, %d, %d, %u, %u, %u, %u\n",
+ n, dev->nFreeChunks, erasedChunks,
+ dev->backgroundGCs, dev->oldestDirtyGCs,
+ dev->nObjects, dev->nTnodes);
+ }
+ up(&yaffs_context_lock);
+
+
+ return buf - page < count ? buf - page : count;
+}
+
+/**
+ * Set the verbosity of the warnings and error messages.
+ *
+ * Note that the names can only be a..z or _ with the current code.
+ */
+
+static struct {
+ char *mask_name;
+ unsigned mask_bitfield;
+} mask_flags[] = {
+ {"allocate", YAFFS_TRACE_ALLOCATE},
+ {"always", YAFFS_TRACE_ALWAYS},
+ {"background", YAFFS_TRACE_BACKGROUND},
+ {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
+ {"buffers", YAFFS_TRACE_BUFFERS},
+ {"bug", YAFFS_TRACE_BUG},
+ {"checkpt", YAFFS_TRACE_CHECKPOINT},
+ {"deletion", YAFFS_TRACE_DELETION},
+ {"erase", YAFFS_TRACE_ERASE},
+ {"error", YAFFS_TRACE_ERROR},
+ {"gc_detail", YAFFS_TRACE_GC_DETAIL},
+ {"gc", YAFFS_TRACE_GC},
+ {"lock", YAFFS_TRACE_LOCK},
+ {"mtd", YAFFS_TRACE_MTD},
+ {"nandaccess", YAFFS_TRACE_NANDACCESS},
+ {"os", YAFFS_TRACE_OS},
+ {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
+ {"scan", YAFFS_TRACE_SCAN},
+ {"tracing", YAFFS_TRACE_TRACING},
+ {"sync", YAFFS_TRACE_SYNC},
+ {"write", YAFFS_TRACE_WRITE},
+
+ {"verify", YAFFS_TRACE_VERIFY},
+ {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
+ {"verify_full", YAFFS_TRACE_VERIFY_FULL},
+ {"verify_all", YAFFS_TRACE_VERIFY_ALL},
+
+ {"all", 0xffffffff},
+ {"none", 0},
+ {NULL, 0},
+};
+
+#define MAX_MASK_NAME_LENGTH 40
+static int yaffs_proc_write_trace_options(struct file *file, const char *buf,
+ unsigned long count, void *data)
+{
+ unsigned rg = 0, mask_bitfield;
+ char *end;
+ char *mask_name;
+ const char *x;
+ char substring[MAX_MASK_NAME_LENGTH + 1];
+ int i;
+ int done = 0;
+ int add, len = 0;
+ int pos = 0;
+
+ rg = yaffs_traceMask;
+
+ while (!done && (pos < count)) {
+ done = 1;
+ while ((pos < count) && isspace(buf[pos]))
+ pos++;
+
+ switch (buf[pos]) {
+ case '+':
+ case '-':
+ case '=':
+ add = buf[pos];
+ pos++;
+ break;
+
+ default:
+ add = ' ';
+ break;
+ }
+ mask_name = NULL;
+
+ mask_bitfield = simple_strtoul(buf + pos, &end, 0);
+
+ if (end > buf + pos) {
+ mask_name = "numeral";
+ len = end - (buf + pos);
+ pos += len;
+ done = 0;
+ } else {
+ for (x = buf + pos, i = 0;
+ (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
+ i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
+ substring[i] = *x;
+ substring[i] = '\0';
+
+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
+ if (strcmp(substring, mask_flags[i].mask_name) == 0) {
+ mask_name = mask_flags[i].mask_name;
+ mask_bitfield = mask_flags[i].mask_bitfield;
+ done = 0;
+ break;
+ }
+ }
+ }
+
+ if (mask_name != NULL) {
+ done = 0;
+ switch (add) {
+ case '-':
+ rg &= ~mask_bitfield;
+ break;
+ case '+':
+ rg |= mask_bitfield;
+ break;
+ case '=':
+ rg = mask_bitfield;
+ break;
+ default:
+ rg |= mask_bitfield;
+ break;
+ }
+ }
+ }
+
+ yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
+
+ printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask);
+
+ if (rg & YAFFS_TRACE_ALWAYS) {
+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
+ char flag;
+ flag = ((rg & mask_flags[i].mask_bitfield) ==
+ mask_flags[i].mask_bitfield) ? '+' : '-';
+ printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
+ }
+ }
+
+ return count;
+}
+
+
+static int yaffs_proc_write(struct file *file, const char *buf,
+ unsigned long count, void *data)
+{
+ return yaffs_proc_write_trace_options(file, buf, count, data);
+}
+
+/* Stuff to handle installation of file systems */
+struct file_system_to_install {
+ struct file_system_type *fst;
+ int installed;
+};
+
+static struct file_system_to_install fs_to_install[] = {
+ {&yaffs_fs_type, 0},
+ {&yaffs2_fs_type, 0},
+ {NULL, 0}
+};
+
+static int __init init_yaffs_fs(void)
+{
+ int error = 0;
+ struct file_system_to_install *fsinst;
+
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs built " __DATE__ " " __TIME__ " Installing. \n")));
+
+#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR(" \n\n\n\nYAFFS-WARNING CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED selected.\n\n\n\n")));
+#endif
+
+
+
+
+ init_MUTEX(&yaffs_context_lock);
+
+ /* Install the proc_fs entries */
+ my_proc_entry = create_proc_entry("yaffs",
+ S_IRUGO | S_IFREG,
+ YPROC_ROOT);
+
+ if (my_proc_entry) {
+ my_proc_entry->write_proc = yaffs_proc_write;
+ my_proc_entry->read_proc = yaffs_proc_read;
+ my_proc_entry->data = NULL;
+ } else
+ return -ENOMEM;
+
+ debug_proc_entry = create_proc_entry("yaffs_stats",
+ S_IRUGO | S_IFREG,
+ YPROC_ROOT);
+
+ if (debug_proc_entry) {
+ debug_proc_entry->write_proc = NULL;
+ debug_proc_entry->read_proc = yaffs_stats_proc_read;
+ debug_proc_entry->data = NULL;
+ } else
+ return -ENOMEM;
+
+ /* Now add the file system entries */
+
+ fsinst = fs_to_install;
+
+ while (fsinst->fst && !error) {
+ error = register_filesystem(fsinst->fst);
+ if (!error)
+ fsinst->installed = 1;
+ fsinst++;
+ }
+
+ /* Any errors? uninstall */
+ if (error) {
+ fsinst = fs_to_install;
+
+ while (fsinst->fst) {
+ if (fsinst->installed) {
+ unregister_filesystem(fsinst->fst);
+ fsinst->installed = 0;
+ }
+ fsinst++;
+ }
+ }
+
+ return error;
+}
+
+static void __exit exit_yaffs_fs(void)
+{
+
+ struct file_system_to_install *fsinst;
+
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs built " __DATE__ " " __TIME__ " removing. \n")));
+
+ remove_proc_entry("yaffs", YPROC_ROOT);
+ remove_proc_entry("yaffs_stats", YPROC_ROOT);
+
+ fsinst = fs_to_install;
+
+ while (fsinst->fst) {
+ if (fsinst->installed) {
+ unregister_filesystem(fsinst->fst);
+ fsinst->installed = 0;
+ }
+ fsinst++;
+ }
+}
+
+module_init(init_yaffs_fs)
+module_exit(exit_yaffs_fs)
+
+MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
+MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2010");
+MODULE_LICENSE("GPL");
diff -Nrup a/fs/yaffs2/yaffs_yaffs1.c b/fs/yaffs2/yaffs_yaffs1.c
--- a/fs/yaffs2/yaffs_yaffs1.c 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_yaffs1.c 2010-10-03 18:03:47.535000365 +0300
@@ -0,0 +1,465 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include "yaffs_yaffs1.h"
+#include "yportenv.h"
+#include "yaffs_trace.h"
+#include "yaffs_bitmap.h"
+#include "yaffs_getblockinfo.h"
+#include "yaffs_nand.h"
+
+
+int yaffs1_Scan(yaffs_Device *dev)
+{
+ yaffs_ExtendedTags tags;
+ int blk;
+ int blockIterator;
+ int startIterator;
+ int endIterator;
+ int result;
+
+ int chunk;
+ int c;
+ int deleted;
+ yaffs_BlockState state;
+ yaffs_Object *hardList = NULL;
+ yaffs_BlockInfo *bi;
+ __u32 sequenceNumber;
+ yaffs_ObjectHeader *oh;
+ yaffs_Object *in;
+ yaffs_Object *parent;
+
+ int alloc_failed = 0;
+
+ struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
+
+
+ __u8 *chunkData;
+
+
+
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("yaffs1_Scan starts intstartblk %d intendblk %d..." TENDSTR),
+ dev->internalStartBlock, dev->internalEndBlock));
+
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+
+ dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
+
+ /* Scan all the blocks to determine their state */
+ bi = dev->blockInfo;
+ for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
+ yaffs_ClearChunkBits(dev, blk);
+ bi->pagesInUse = 0;
+ bi->softDeletions = 0;
+
+ yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
+
+ bi->blockState = state;
+ bi->sequenceNumber = sequenceNumber;
+
+ if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
+ bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
+
+ T(YAFFS_TRACE_SCAN_DEBUG,
+ (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
+ state, sequenceNumber));
+
+ if (state == YAFFS_BLOCK_STATE_DEAD) {
+ T(YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("block %d is bad" TENDSTR), blk));
+ } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
+ T(YAFFS_TRACE_SCAN_DEBUG,
+ (TSTR("Block empty " TENDSTR)));
+ dev->nErasedBlocks++;
+ dev->nFreeChunks += dev->param.nChunksPerBlock;
+ }
+ bi++;
+ }
+
+ startIterator = dev->internalStartBlock;
+ endIterator = dev->internalEndBlock;
+
+ /* For each block.... */
+ for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
+ blockIterator++) {
+
+ YYIELD();
+
+ YYIELD();
+
+ blk = blockIterator;
+
+ bi = yaffs_GetBlockInfo(dev, blk);
+ state = bi->blockState;
+
+ deleted = 0;
+
+ /* For each chunk in each block that needs scanning....*/
+ for (c = 0; !alloc_failed && c < dev->param.nChunksPerBlock &&
+ state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
+ /* Read the tags and decide what to do */
+ chunk = blk * dev->param.nChunksPerBlock + c;
+
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
+ &tags);
+
+ /* Let's have a good look at this chunk... */
+
+ if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
+ /* YAFFS1 only...
+ * A deleted chunk
+ */
+ deleted++;
+ dev->nFreeChunks++;
+ /*T((" %d %d deleted\n",blk,c)); */
+ } else if (!tags.chunkUsed) {
+ /* An unassigned chunk in the block
+ * This means that either the block is empty or
+ * this is the one being allocated from
+ */
+
+ if (c == 0) {
+ /* We're looking at the first chunk in the block so the block is unused */
+ state = YAFFS_BLOCK_STATE_EMPTY;
+ dev->nErasedBlocks++;
+ } else {
+ /* this is the block being allocated from */
+ T(YAFFS_TRACE_SCAN,
+ (TSTR
+ (" Allocating from %d %d" TENDSTR),
+ blk, c));
+ state = YAFFS_BLOCK_STATE_ALLOCATING;
+ dev->allocationBlock = blk;
+ dev->allocationPage = c;
+ dev->allocationBlockFinder = blk;
+ /* Set block finder here to encourage the allocator to go forth from here. */
+
+ }
+
+ dev->nFreeChunks += (dev->param.nChunksPerBlock - c);
+ } else if (tags.chunkId > 0) {
+ /* chunkId > 0 so it is a data chunk... */
+ unsigned int endpos;
+
+ yaffs_SetChunkBit(dev, blk, c);
+ bi->pagesInUse++;
+
+ in = yaffs_FindOrCreateObjectByNumber(dev,
+ tags.
+ objectId,
+ YAFFS_OBJECT_TYPE_FILE);
+ /* PutChunkIntoFile checks for a clash (two data chunks with
+ * the same chunkId).
+ */
+
+ if (!in)
+ alloc_failed = 1;
+
+ if (in) {
+ if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
+ alloc_failed = 1;
+ }
+
+ endpos =
+ (tags.chunkId - 1) * dev->nDataBytesPerChunk +
+ tags.byteCount;
+ if (in &&
+ in->variantType == YAFFS_OBJECT_TYPE_FILE
+ && in->variant.fileVariant.scannedFileSize <
+ endpos) {
+ in->variant.fileVariant.
+ scannedFileSize = endpos;
+ if (!dev->param.useHeaderFileSize) {
+ in->variant.fileVariant.
+ fileSize =
+ in->variant.fileVariant.
+ scannedFileSize;
+ }
+
+ }
+ /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
+ } else {
+ /* chunkId == 0, so it is an ObjectHeader.
+ * Thus, we read in the object header and make the object
+ */
+ yaffs_SetChunkBit(dev, blk, c);
+ bi->pagesInUse++;
+
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
+ chunkData,
+ NULL);
+
+ oh = (yaffs_ObjectHeader *) chunkData;
+
+ in = yaffs_FindObjectByNumber(dev,
+ tags.objectId);
+ if (in && in->variantType != oh->type) {
+ /* This should not happen, but somehow
+ * Wev'e ended up with an objectId that has been reused but not yet
+ * deleted, and worse still it has changed type. Delete the old object.
+ */
+
+ yaffs_DeleteObject(in);
+
+ in = 0;
+ }
+
+ in = yaffs_FindOrCreateObjectByNumber(dev,
+ tags.
+ objectId,
+ oh->type);
+
+ if (!in)
+ alloc_failed = 1;
+
+ if (in && oh->shadowsObject > 0) {
+
+ struct yaffs_ShadowFixerStruct *fixer;
+ fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
+ if (fixer) {
+ fixer->next = shadowFixerList;
+ shadowFixerList = fixer;
+ fixer->objectId = tags.objectId;
+ fixer->shadowedId = oh->shadowsObject;
+ T(YAFFS_TRACE_SCAN,
+ (TSTR
+ (" Shadow fixer: %d shadows %d" TENDSTR),
+ fixer->objectId, fixer->shadowedId));
+
+ }
+
+ }
+
+ if (in && in->valid) {
+ /* We have already filled this one. We have a duplicate and need to resolve it. */
+
+ unsigned existingSerial = in->serial;
+ unsigned newSerial = tags.serialNumber;
+
+ if (((existingSerial + 1) & 3) == newSerial) {
+ /* Use new one - destroy the exisiting one */
+ yaffs_DeleteChunk(dev,
+ in->hdrChunk,
+ 1, __LINE__);
+ in->valid = 0;
+ } else {
+ /* Use existing - destroy this one. */
+ yaffs_DeleteChunk(dev, chunk, 1,
+ __LINE__);
+ }
+ }
+
+ if (in && !in->valid &&
+ (tags.objectId == YAFFS_OBJECTID_ROOT ||
+ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
+ /* We only load some info, don't fiddle with directory structure */
+ in->valid = 1;
+ in->variantType = oh->type;
+
+ in->yst_mode = oh->yst_mode;
+#ifdef CONFIG_YAFFS_WINCE
+ in->win_atime[0] = oh->win_atime[0];
+ in->win_ctime[0] = oh->win_ctime[0];
+ in->win_mtime[0] = oh->win_mtime[0];
+ in->win_atime[1] = oh->win_atime[1];
+ in->win_ctime[1] = oh->win_ctime[1];
+ in->win_mtime[1] = oh->win_mtime[1];
+#else
+ in->yst_uid = oh->yst_uid;
+ in->yst_gid = oh->yst_gid;
+ in->yst_atime = oh->yst_atime;
+ in->yst_mtime = oh->yst_mtime;
+ in->yst_ctime = oh->yst_ctime;
+ in->yst_rdev = oh->yst_rdev;
+#endif
+ in->hdrChunk = chunk;
+ in->serial = tags.serialNumber;
+
+ } else if (in && !in->valid) {
+ /* we need to load this info */
+
+ in->valid = 1;
+ in->variantType = oh->type;
+
+ in->yst_mode = oh->yst_mode;
+#ifdef CONFIG_YAFFS_WINCE
+ in->win_atime[0] = oh->win_atime[0];
+ in->win_ctime[0] = oh->win_ctime[0];
+ in->win_mtime[0] = oh->win_mtime[0];
+ in->win_atime[1] = oh->win_atime[1];
+ in->win_ctime[1] = oh->win_ctime[1];
+ in->win_mtime[1] = oh->win_mtime[1];
+#else
+ in->yst_uid = oh->yst_uid;
+ in->yst_gid = oh->yst_gid;
+ in->yst_atime = oh->yst_atime;
+ in->yst_mtime = oh->yst_mtime;
+ in->yst_ctime = oh->yst_ctime;
+ in->yst_rdev = oh->yst_rdev;
+#endif
+ in->hdrChunk = chunk;
+ in->serial = tags.serialNumber;
+
+ yaffs_SetObjectNameFromOH(in, oh);
+ in->dirty = 0;
+
+ /* directory stuff...
+ * hook up to parent
+ */
+
+ parent =
+ yaffs_FindOrCreateObjectByNumber
+ (dev, oh->parentObjectId,
+ YAFFS_OBJECT_TYPE_DIRECTORY);
+ if (!parent)
+ alloc_failed = 1;
+ if (parent && parent->variantType ==
+ YAFFS_OBJECT_TYPE_UNKNOWN) {
+ /* Set up as a directory */
+ parent->variantType =
+ YAFFS_OBJECT_TYPE_DIRECTORY;
+ YINIT_LIST_HEAD(&parent->variant.
+ directoryVariant.
+ children);
+ } else if (!parent || parent->variantType !=
+ YAFFS_OBJECT_TYPE_DIRECTORY) {
+ /* Hoosterman, another problem....
+ * We're trying to use a non-directory as a directory
+ */
+
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
+ TENDSTR)));
+ parent = dev->lostNFoundDir;
+ }
+
+ yaffs_AddObjectToDirectory(parent, in);
+
+ if (0 && (parent == dev->deletedDir ||
+ parent == dev->unlinkedDir)) {
+ in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
+ dev->nDeletedFiles++;
+ }
+ /* Note re hardlinks.
+ * Since we might scan a hardlink before its equivalent object is scanned
+ * we put them all in a list.
+ * After scanning is complete, we should have all the objects, so we run through this
+ * list and fix up all the chains.
+ */
+
+ switch (in->variantType) {
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ /* Todo got a problem */
+ break;
+ case YAFFS_OBJECT_TYPE_FILE:
+ if (dev->param.useHeaderFileSize)
+
+ in->variant.fileVariant.
+ fileSize =
+ oh->fileSize;
+
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ in->variant.hardLinkVariant.
+ equivalentObjectId =
+ oh->equivalentObjectId;
+ in->hardLinks.next =
+ (struct ylist_head *)
+ hardList;
+ hardList = in;
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ in->variant.symLinkVariant.alias =
+ yaffs_CloneString(oh->alias);
+ if (!in->variant.symLinkVariant.alias)
+ alloc_failed = 1;
+ break;
+ }
+
+ }
+ }
+ }
+
+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+ /* If we got this far while scanning, then the block is fully allocated.*/
+ state = YAFFS_BLOCK_STATE_FULL;
+ }
+
+ if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
+ /* If the block was partially allocated then treat it as fully allocated.*/
+ state = YAFFS_BLOCK_STATE_FULL;
+ dev->allocationBlock = -1;
+ }
+
+ bi->blockState = state;
+
+ /* Now let's see if it was dirty */
+ if (bi->pagesInUse == 0 &&
+ !bi->hasShrinkHeader &&
+ bi->blockState == YAFFS_BLOCK_STATE_FULL) {
+ yaffs_BlockBecameDirty(dev, blk);
+ }
+
+ }
+
+
+ /* Ok, we've done all the scanning.
+ * Fix up the hard link chains.
+ * We should now have scanned all the objects, now it's time to add these
+ * hardlinks.
+ */
+
+ yaffs_HardlinkFixup(dev, hardList);
+
+ /* Fix up any shadowed objects */
+ {
+ struct yaffs_ShadowFixerStruct *fixer;
+ yaffs_Object *obj;
+
+ while (shadowFixerList) {
+ fixer = shadowFixerList;
+ shadowFixerList = fixer->next;
+ /* Complete the rename transaction by deleting the shadowed object
+ * then setting the object header to unshadowed.
+ */
+ obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
+ if (obj)
+ yaffs_DeleteObject(obj);
+
+ obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
+
+ if (obj)
+ yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0, NULL);
+
+ YFREE(fixer);
+ }
+ }
+
+ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+
+ if (alloc_failed)
+ return YAFFS_FAIL;
+
+ T(YAFFS_TRACE_SCAN, (TSTR("yaffs1_Scan ends" TENDSTR)));
+
+
+ return YAFFS_OK;
+}
+
diff -Nrup a/fs/yaffs2/yaffs_yaffs1.h b/fs/yaffs2/yaffs_yaffs1.h
--- a/fs/yaffs2/yaffs_yaffs1.h 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_yaffs1.h 2010-10-03 18:03:47.551000365 +0300
@@ -0,0 +1,22 @@
+/*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
+#ifndef __YAFFS_YAFFS1_H__
+#define __YAFFS_YAFFS1_H__
+
+#include "yaffs_guts.h"
+int yaffs1_Scan(yaffs_Device *dev);
+
+#endif
diff -Nrup a/fs/yaffs2/yaffs_yaffs2.c b/fs/yaffs2/yaffs_yaffs2.c
--- a/fs/yaffs2/yaffs_yaffs2.c 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_yaffs2.c 2010-10-03 18:03:47.536000367 +0300
@@ -0,0 +1,1540 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+
+#include "yaffs_guts.h"
+#include "yaffs_trace.h"
+#include "yaffs_yaffs2.h"
+#include "yaffs_checkptrw.h"
+#include "yaffs_bitmap.h"
+#include "yaffs_qsort.h"
+#include "yaffs_nand.h"
+#include "yaffs_getblockinfo.h"
+#include "yaffs_verify.h"
+
+/*
+ * Checkpoints are really no benefit on very small partitions.
+ *
+ * To save space on small partitions don't bother with checkpoints unless
+ * the partition is at least this big.
+ */
+#define YAFFS_CHECKPOINT_MIN_BLOCKS 60
+
+#define YAFFS_SMALL_HOLE_THRESHOLD 4
+
+
+/*
+ * Oldest Dirty Sequence Number handling.
+ */
+
+/* yaffs2_CalcOldestDirtySequence()
+ * yaffs2_FindOldestDirtySequence()
+ * Calculate the oldest dirty sequence number if we don't know it.
+ */
+void yaffs2_CalcOldestDirtySequence(yaffs_Device *dev)
+{
+ int i;
+ unsigned seq;
+ unsigned blockNo = 0;
+ yaffs_BlockInfo *b;
+
+ if(!dev->param.isYaffs2)
+ return;
+
+ /* Find the oldest dirty sequence number. */
+ seq = dev->sequenceNumber + 1;
+ b = dev->blockInfo;
+ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+ if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
+ (b->pagesInUse - b->softDeletions) < dev->param.nChunksPerBlock &&
+ b->sequenceNumber < seq) {
+ seq = b->sequenceNumber;
+ blockNo = i;
+ }
+ b++;
+ }
+
+ if(blockNo){
+ dev->oldestDirtySequence = seq;
+ dev->oldestDirtyBlock = blockNo;
+ }
+
+}
+
+
+void yaffs2_FindOldestDirtySequence(yaffs_Device *dev)
+{
+ if(!dev->param.isYaffs2)
+ return;
+
+ if(!dev->oldestDirtySequence)
+ yaffs2_CalcOldestDirtySequence(dev);
+}
+
+/*
+ * yaffs_ClearOldestDirtySequence()
+ * Called when a block is erased or marked bad. (ie. when its sequenceNumber
+ * becomes invalid). If the value matches the oldest then we clear
+ * dev->oldestDirtySequence to force its recomputation.
+ */
+void yaffs2_ClearOldestDirtySequence(yaffs_Device *dev, yaffs_BlockInfo *bi)
+{
+
+ if(!dev->param.isYaffs2)
+ return;
+
+ if(!bi || bi->sequenceNumber == dev->oldestDirtySequence){
+ dev->oldestDirtySequence = 0;
+ dev->oldestDirtyBlock = 0;
+ }
+}
+
+/*
+ * yaffs2_UpdateOldestDirtySequence()
+ * Update the oldest dirty sequence number whenever we dirty a block.
+ * Only do this if the oldestDirtySequence is actually being tracked.
+ */
+void yaffs2_UpdateOldestDirtySequence(yaffs_Device *dev, unsigned blockNo, yaffs_BlockInfo *bi)
+{
+ if(!dev->param.isYaffs2)
+ return;
+
+ if(dev->oldestDirtySequence){
+ if(dev->oldestDirtySequence > bi->sequenceNumber){
+ dev->oldestDirtySequence = bi->sequenceNumber;
+ dev->oldestDirtyBlock = blockNo;
+ }
+ }
+}
+
+int yaffs2_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
+ yaffs_BlockInfo *bi)
+{
+
+ if (!dev->param.isYaffs2)
+ return 1; /* disqualification only applies to yaffs2. */
+
+ if (!bi->hasShrinkHeader)
+ return 1; /* can gc */
+
+ yaffs2_FindOldestDirtySequence(dev);
+
+ /* Can't do gc of this block if there are any blocks older than this one that have
+ * discarded pages.
+ */
+ return (bi->sequenceNumber <= dev->oldestDirtySequence);
+}
+
+/*
+ * yaffs2_FindRefreshBlock()
+ * periodically finds the oldest full block by sequence number for refreshing.
+ * Only for yaffs2.
+ */
+__u32 yaffs2_FindRefreshBlock(yaffs_Device *dev)
+{
+ __u32 b ;
+
+ __u32 oldest = 0;
+ __u32 oldestSequence = 0;
+
+ yaffs_BlockInfo *bi;
+
+ if(!dev->param.isYaffs2)
+ return oldest;
+
+ /*
+ * If refresh period < 10 then refreshing is disabled.
+ */
+ if(dev->param.refreshPeriod < 10)
+ return oldest;
+
+ /*
+ * Fix broken values.
+ */
+ if(dev->refreshSkip > dev->param.refreshPeriod)
+ dev->refreshSkip = dev->param.refreshPeriod;
+
+ if(dev->refreshSkip > 0)
+ return oldest;
+
+ /*
+ * Refresh skip is now zero.
+ * We'll do a refresh this time around....
+ * Update the refresh skip and find the oldest block.
+ */
+ dev->refreshSkip = dev->param.refreshPeriod;
+ dev->refreshCount++;
+ bi = dev->blockInfo;
+ for (b = dev->internalStartBlock; b <=dev->internalEndBlock; b++){
+
+ if (bi->blockState == YAFFS_BLOCK_STATE_FULL){
+
+ if(oldest < 1 ||
+ bi->sequenceNumber < oldestSequence){
+ oldest = b;
+ oldestSequence = bi->sequenceNumber;
+ }
+ }
+ bi++;
+ }
+
+ if (oldest > 0) {
+ T(YAFFS_TRACE_GC,
+ (TSTR("GC refresh count %d selected block %d with sequenceNumber %d" TENDSTR),
+ dev->refreshCount, oldest, oldestSequence));
+ }
+
+ return oldest;
+}
+
+int yaffs2_CheckpointRequired(yaffs_Device *dev)
+{
+ int nblocks;
+
+ if(!dev->param.isYaffs2)
+ return 0;
+
+ nblocks = dev->internalEndBlock - dev->internalStartBlock + 1 ;
+
+ return !dev->param.skipCheckpointWrite &&
+ !dev->readOnly &&
+ (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS);
+}
+
+int yaffs2_CalcCheckpointBlocksRequired(yaffs_Device *dev)
+{
+ int retval;
+
+ if(!dev->param.isYaffs2)
+ return 0;
+
+ if (!dev->nCheckpointBlocksRequired &&
+ yaffs2_CheckpointRequired(dev)){
+ /* Not a valid value so recalculate */
+ int nBytes = 0;
+ int nBlocks;
+ int devBlocks = (dev->param.endBlock - dev->param.startBlock + 1);
+
+ nBytes += sizeof(yaffs_CheckpointValidity);
+ nBytes += sizeof(yaffs_CheckpointDevice);
+ nBytes += devBlocks * sizeof(yaffs_BlockInfo);
+ nBytes += devBlocks * dev->chunkBitmapStride;
+ nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjects);
+ nBytes += (dev->tnodeSize + sizeof(__u32)) * (dev->nTnodes);
+ nBytes += sizeof(yaffs_CheckpointValidity);
+ nBytes += sizeof(__u32); /* checksum*/
+
+ /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
+
+ nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->param.nChunksPerBlock)) + 3;
+
+ dev->nCheckpointBlocksRequired = nBlocks;
+ }
+
+ retval = dev->nCheckpointBlocksRequired - dev->blocksInCheckpoint;
+ if(retval < 0)
+ retval = 0;
+ return retval;
+}
+
+/*--------------------- Checkpointing --------------------*/
+
+
+static int yaffs2_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
+{
+ yaffs_CheckpointValidity cp;
+
+ memset(&cp, 0, sizeof(cp));
+
+ cp.structType = sizeof(cp);
+ cp.magic = YAFFS_MAGIC;
+ cp.version = YAFFS_CHECKPOINT_VERSION;
+ cp.head = (head) ? 1 : 0;
+
+ return (yaffs2_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
+ 1 : 0;
+}
+
+static int yaffs2_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
+{
+ yaffs_CheckpointValidity cp;
+ int ok;
+
+ ok = (yaffs2_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+
+ if (ok)
+ ok = (cp.structType == sizeof(cp)) &&
+ (cp.magic == YAFFS_MAGIC) &&
+ (cp.version == YAFFS_CHECKPOINT_VERSION) &&
+ (cp.head == ((head) ? 1 : 0));
+ return ok ? 1 : 0;
+}
+
+static void yaffs2_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
+ yaffs_Device *dev)
+{
+ cp->nErasedBlocks = dev->nErasedBlocks;
+ cp->allocationBlock = dev->allocationBlock;
+ cp->allocationPage = dev->allocationPage;
+ cp->nFreeChunks = dev->nFreeChunks;
+
+ cp->nDeletedFiles = dev->nDeletedFiles;
+ cp->nUnlinkedFiles = dev->nUnlinkedFiles;
+ cp->nBackgroundDeletions = dev->nBackgroundDeletions;
+ cp->sequenceNumber = dev->sequenceNumber;
+
+}
+
+static void yaffs2_CheckpointDeviceToDevice(yaffs_Device *dev,
+ yaffs_CheckpointDevice *cp)
+{
+ dev->nErasedBlocks = cp->nErasedBlocks;
+ dev->allocationBlock = cp->allocationBlock;
+ dev->allocationPage = cp->allocationPage;
+ dev->nFreeChunks = cp->nFreeChunks;
+
+ dev->nDeletedFiles = cp->nDeletedFiles;
+ dev->nUnlinkedFiles = cp->nUnlinkedFiles;
+ dev->nBackgroundDeletions = cp->nBackgroundDeletions;
+ dev->sequenceNumber = cp->sequenceNumber;
+}
+
+
+static int yaffs2_WriteCheckpointDevice(yaffs_Device *dev)
+{
+ yaffs_CheckpointDevice cp;
+ __u32 nBytes;
+ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
+
+ int ok;
+
+ /* Write device runtime values*/
+ yaffs2_DeviceToCheckpointDevice(&cp, dev);
+ cp.structType = sizeof(cp);
+
+ ok = (yaffs2_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+
+ /* Write block info */
+ if (ok) {
+ nBytes = nBlocks * sizeof(yaffs_BlockInfo);
+ ok = (yaffs2_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
+ }
+
+ /* Write chunk bits */
+ if (ok) {
+ nBytes = nBlocks * dev->chunkBitmapStride;
+ ok = (yaffs2_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
+ }
+ return ok ? 1 : 0;
+
+}
+
+static int yaffs2_ReadCheckpointDevice(yaffs_Device *dev)
+{
+ yaffs_CheckpointDevice cp;
+ __u32 nBytes;
+ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
+
+ int ok;
+
+ ok = (yaffs2_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+ if (!ok)
+ return 0;
+
+ if (cp.structType != sizeof(cp))
+ return 0;
+
+
+ yaffs2_CheckpointDeviceToDevice(dev, &cp);
+
+ nBytes = nBlocks * sizeof(yaffs_BlockInfo);
+
+ ok = (yaffs2_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
+
+ if (!ok)
+ return 0;
+ nBytes = nBlocks * dev->chunkBitmapStride;
+
+ ok = (yaffs2_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
+
+ return ok ? 1 : 0;
+}
+
+static void yaffs2_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
+ yaffs_Object *obj)
+{
+
+ cp->objectId = obj->objectId;
+ cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
+ cp->hdrChunk = obj->hdrChunk;
+ cp->variantType = obj->variantType;
+ cp->deleted = obj->deleted;
+ cp->softDeleted = obj->softDeleted;
+ cp->unlinked = obj->unlinked;
+ cp->fake = obj->fake;
+ cp->renameAllowed = obj->renameAllowed;
+ cp->unlinkAllowed = obj->unlinkAllowed;
+ cp->serial = obj->serial;
+ cp->nDataChunks = obj->nDataChunks;
+
+ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+ cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
+ else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
+ cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
+}
+
+static int yaffs2_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
+{
+
+ yaffs_Object *parent;
+
+ if (obj->variantType != cp->variantType) {
+ T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
+ TCONT("chunk %d does not match existing object type %d")
+ TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
+ obj->variantType));
+ return 0;
+ }
+
+ obj->objectId = cp->objectId;
+
+ if (cp->parentId)
+ parent = yaffs_FindOrCreateObjectByNumber(
+ obj->myDev,
+ cp->parentId,
+ YAFFS_OBJECT_TYPE_DIRECTORY);
+ else
+ parent = NULL;
+
+ if (parent) {
+ if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
+ TCONT(" chunk %d Parent type, %d, not directory")
+ TENDSTR),
+ cp->objectId, cp->parentId, cp->variantType,
+ cp->hdrChunk, parent->variantType));
+ return 0;
+ }
+ yaffs_AddObjectToDirectory(parent, obj);
+ }
+
+ obj->hdrChunk = cp->hdrChunk;
+ obj->variantType = cp->variantType;
+ obj->deleted = cp->deleted;
+ obj->softDeleted = cp->softDeleted;
+ obj->unlinked = cp->unlinked;
+ obj->fake = cp->fake;
+ obj->renameAllowed = cp->renameAllowed;
+ obj->unlinkAllowed = cp->unlinkAllowed;
+ obj->serial = cp->serial;
+ obj->nDataChunks = cp->nDataChunks;
+
+ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+ obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
+ else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
+ obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
+
+ if (obj->hdrChunk > 0)
+ obj->lazyLoaded = 1;
+ return 1;
+}
+
+
+
+static int yaffs2_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
+ __u32 level, int chunkOffset)
+{
+ int i;
+ yaffs_Device *dev = in->myDev;
+ int ok = 1;
+
+ if (tn) {
+ if (level > 0) {
+
+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
+ if (tn->internal[i]) {
+ ok = yaffs2_CheckpointTnodeWorker(in,
+ tn->internal[i],
+ level - 1,
+ (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
+ }
+ }
+ } else if (level == 0) {
+ __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
+ ok = (yaffs2_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
+ if (ok)
+ ok = (yaffs2_CheckpointWrite(dev, tn, dev->tnodeSize) == dev->tnodeSize);
+ }
+ }
+
+ return ok;
+
+}
+
+static int yaffs2_WriteCheckpointTnodes(yaffs_Object *obj)
+{
+ __u32 endMarker = ~0;
+ int ok = 1;
+
+ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
+ ok = yaffs2_CheckpointTnodeWorker(obj,
+ obj->variant.fileVariant.top,
+ obj->variant.fileVariant.topLevel,
+ 0);
+ if (ok)
+ ok = (yaffs2_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
+ sizeof(endMarker));
+ }
+
+ return ok ? 1 : 0;
+}
+
+static int yaffs2_ReadCheckpointTnodes(yaffs_Object *obj)
+{
+ __u32 baseChunk;
+ int ok = 1;
+ yaffs_Device *dev = obj->myDev;
+ yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
+ yaffs_Tnode *tn;
+ int nread = 0;
+
+ ok = (yaffs2_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
+
+ while (ok && (~baseChunk)) {
+ nread++;
+ /* Read level 0 tnode */
+
+
+ tn = yaffs_GetTnode(dev);
+ if (tn){
+ ok = (yaffs2_CheckpointRead(dev, tn, dev->tnodeSize) == dev->tnodeSize);
+ } else
+ ok = 0;
+
+ if (tn && ok)
+ ok = yaffs_AddOrFindLevel0Tnode(dev,
+ fileStructPtr,
+ baseChunk,
+ tn) ? 1 : 0;
+
+ if (ok)
+ ok = (yaffs2_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
+
+ }
+
+ T(YAFFS_TRACE_CHECKPOINT, (
+ TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
+ nread, baseChunk, ok));
+
+ return ok ? 1 : 0;
+}
+
+
+static int yaffs2_WriteCheckpointObjects(yaffs_Device *dev)
+{
+ yaffs_Object *obj;
+ yaffs_CheckpointObject cp;
+ int i;
+ int ok = 1;
+ struct ylist_head *lh;
+
+
+ /* Iterate through the objects in each hash entry,
+ * dumping them to the checkpointing stream.
+ */
+
+ for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
+ ylist_for_each(lh, &dev->objectBucket[i].list) {
+ if (lh) {
+ obj = ylist_entry(lh, yaffs_Object, hashLink);
+ if (!obj->deferedFree) {
+ yaffs2_ObjectToCheckpointObject(&cp, obj);
+ cp.structType = sizeof(cp);
+
+ T(YAFFS_TRACE_CHECKPOINT, (
+ TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %p" TENDSTR),
+ cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, obj));
+
+ ok = (yaffs2_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+
+ if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+ ok = yaffs2_WriteCheckpointTnodes(obj);
+ }
+ }
+ }
+ }
+
+ /* Dump end of list */
+ memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
+ cp.structType = sizeof(cp);
+
+ if (ok)
+ ok = (yaffs2_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+
+ return ok ? 1 : 0;
+}
+
+static int yaffs2_ReadCheckpointObjects(yaffs_Device *dev)
+{
+ yaffs_Object *obj;
+ yaffs_CheckpointObject cp;
+ int ok = 1;
+ int done = 0;
+ yaffs_Object *hardList = NULL;
+
+ while (ok && !done) {
+ ok = (yaffs2_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+ if (cp.structType != sizeof(cp)) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
+ cp.structType, (int)sizeof(cp), ok));
+ ok = 0;
+ }
+
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
+ cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
+
+ if (ok && cp.objectId == ~0)
+ done = 1;
+ else if (ok) {
+ obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
+ if (obj) {
+ ok = yaffs2_CheckpointObjectToObject(obj, &cp);
+ if (!ok)
+ break;
+ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
+ ok = yaffs2_ReadCheckpointTnodes(obj);
+ } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
+ obj->hardLinks.next =
+ (struct ylist_head *) hardList;
+ hardList = obj;
+ }
+ } else
+ ok = 0;
+ }
+ }
+
+ if (ok)
+ yaffs_HardlinkFixup(dev, hardList);
+
+ return ok ? 1 : 0;
+}
+
+static int yaffs2_WriteCheckpointSum(yaffs_Device *dev)
+{
+ __u32 checkpointSum;
+ int ok;
+
+ yaffs2_GetCheckpointSum(dev, &checkpointSum);
+
+ ok = (yaffs2_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
+
+ if (!ok)
+ return 0;
+
+ return 1;
+}
+
+static int yaffs2_ReadCheckpointSum(yaffs_Device *dev)
+{
+ __u32 checkpointSum0;
+ __u32 checkpointSum1;
+ int ok;
+
+ yaffs2_GetCheckpointSum(dev, &checkpointSum0);
+
+ ok = (yaffs2_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
+
+ if (!ok)
+ return 0;
+
+ if (checkpointSum0 != checkpointSum1)
+ return 0;
+
+ return 1;
+}
+
+
+static int yaffs2_WriteCheckpointData(yaffs_Device *dev)
+{
+ int ok = 1;
+
+ if (!yaffs2_CheckpointRequired(dev)) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
+ ok = 0;
+ }
+
+ if (ok)
+ ok = yaffs2_CheckpointOpen(dev, 1);
+
+ if (ok) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
+ ok = yaffs2_WriteCheckpointValidityMarker(dev, 1);
+ }
+ if (ok) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
+ ok = yaffs2_WriteCheckpointDevice(dev);
+ }
+ if (ok) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
+ ok = yaffs2_WriteCheckpointObjects(dev);
+ }
+ if (ok) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
+ ok = yaffs2_WriteCheckpointValidityMarker(dev, 0);
+ }
+
+ if (ok)
+ ok = yaffs2_WriteCheckpointSum(dev);
+
+ if (!yaffs2_CheckpointClose(dev))
+ ok = 0;
+
+ if (ok)
+ dev->isCheckpointed = 1;
+ else
+ dev->isCheckpointed = 0;
+
+ return dev->isCheckpointed;
+}
+
+static int yaffs2_ReadCheckpointData(yaffs_Device *dev)
+{
+ int ok = 1;
+
+ if(!dev->param.isYaffs2)
+ ok = 0;
+
+ if (ok && dev->param.skipCheckpointRead) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
+ ok = 0;
+ }
+
+ if (ok)
+ ok = yaffs2_CheckpointOpen(dev, 0); /* open for read */
+
+ if (ok) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
+ ok = yaffs2_ReadCheckpointValidityMarker(dev, 1);
+ }
+ if (ok) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
+ ok = yaffs2_ReadCheckpointDevice(dev);
+ }
+ if (ok) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
+ ok = yaffs2_ReadCheckpointObjects(dev);
+ }
+ if (ok) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
+ ok = yaffs2_ReadCheckpointValidityMarker(dev, 0);
+ }
+
+ if (ok) {
+ ok = yaffs2_ReadCheckpointSum(dev);
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
+ }
+
+ if (!yaffs2_CheckpointClose(dev))
+ ok = 0;
+
+ if (ok)
+ dev->isCheckpointed = 1;
+ else
+ dev->isCheckpointed = 0;
+
+ return ok ? 1 : 0;
+
+}
+
+void yaffs2_InvalidateCheckpoint(yaffs_Device *dev)
+{
+ if (dev->isCheckpointed ||
+ dev->blocksInCheckpoint > 0) {
+ dev->isCheckpointed = 0;
+ yaffs2_CheckpointInvalidateStream(dev);
+ }
+ if (dev->param.markSuperBlockDirty)
+ dev->param.markSuperBlockDirty(dev);
+}
+
+
+int yaffs_CheckpointSave(yaffs_Device *dev)
+{
+
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+
+ yaffs_VerifyObjects(dev);
+ yaffs_VerifyBlocks(dev);
+ yaffs_VerifyFreeChunks(dev);
+
+ if (!dev->isCheckpointed) {
+ yaffs2_InvalidateCheckpoint(dev);
+ yaffs2_WriteCheckpointData(dev);
+ }
+
+ T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+
+ return dev->isCheckpointed;
+}
+
+int yaffs2_CheckpointRestore(yaffs_Device *dev)
+{
+ int retval;
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+
+ retval = yaffs2_ReadCheckpointData(dev);
+
+ if (dev->isCheckpointed) {
+ yaffs_VerifyObjects(dev);
+ yaffs_VerifyBlocks(dev);
+ yaffs_VerifyFreeChunks(dev);
+ }
+
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+
+ return retval;
+}
+
+int yaffs2_HandleHole(yaffs_Object *obj, loff_t newSize)
+{
+ /* if newsSize > oldFileSize.
+ * We're going to be writing a hole.
+ * If the hole is small then write zeros otherwise write a start of hole marker.
+ */
+
+
+ loff_t oldFileSize;
+ int increase;
+ int smallHole ;
+ int result = YAFFS_OK;
+ yaffs_Device *dev = NULL;
+
+ __u8 *localBuffer = NULL;
+
+ int smallIncreaseOk = 0;
+
+ if(!obj)
+ return YAFFS_FAIL;
+
+ if(obj->variantType != YAFFS_OBJECT_TYPE_FILE)
+ return YAFFS_FAIL;
+
+ dev = obj->myDev;
+
+ /* Bail out if not yaffs2 mode */
+ if(!dev->param.isYaffs2)
+ return YAFFS_OK;
+
+ oldFileSize = obj->variant.fileVariant.fileSize;
+
+ if (newSize <= oldFileSize)
+ return YAFFS_OK;
+
+ increase = newSize - oldFileSize;
+
+ if(increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->nDataBytesPerChunk &&
+ yaffs_CheckSpaceForAllocation(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1))
+ smallHole = 1;
+ else
+ smallHole = 0;
+
+ if(smallHole)
+ localBuffer= yaffs_GetTempBuffer(dev, __LINE__);
+
+ if(localBuffer){
+ /* fill hole with zero bytes */
+ int pos = oldFileSize;
+ int thisWrite;
+ int written;
+ memset(localBuffer,0,dev->nDataBytesPerChunk);
+ smallIncreaseOk = 1;
+
+ while(increase > 0 && smallIncreaseOk){
+ thisWrite = increase;
+ if(thisWrite > dev->nDataBytesPerChunk)
+ thisWrite = dev->nDataBytesPerChunk;
+ written = yaffs_DoWriteDataToFile(obj,localBuffer,pos,thisWrite,0);
+ if(written == thisWrite){
+ pos += thisWrite;
+ increase -= thisWrite;
+ } else
+ smallIncreaseOk = 0;
+ }
+
+ yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
+
+ /* If we were out of space then reverse any chunks we've added */
+ if(!smallIncreaseOk)
+ yaffs_ResizeDown(obj, oldFileSize);
+ }
+
+ if (!smallIncreaseOk &&
+ obj->parent &&
+ obj->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
+ obj->parent->objectId != YAFFS_OBJECTID_DELETED){
+ /* Write a hole start header with the old file size */
+ yaffs_UpdateObjectHeader(obj, NULL, 0, 1, 0, NULL);
+ }
+
+ return result;
+
+}
+
+
+typedef struct {
+ int seq;
+ int block;
+} yaffs_BlockIndex;
+
+
+static int yaffs2_ybicmp(const void *a, const void *b)
+{
+ register int aseq = ((yaffs_BlockIndex *)a)->seq;
+ register int bseq = ((yaffs_BlockIndex *)b)->seq;
+ register int ablock = ((yaffs_BlockIndex *)a)->block;
+ register int bblock = ((yaffs_BlockIndex *)b)->block;
+ if (aseq == bseq)
+ return ablock - bblock;
+ else
+ return aseq - bseq;
+}
+
+int yaffs2_ScanBackwards(yaffs_Device *dev)
+{
+ yaffs_ExtendedTags tags;
+ int blk;
+ int blockIterator;
+ int startIterator;
+ int endIterator;
+ int nBlocksToScan = 0;
+
+ int chunk;
+ int result;
+ int c;
+ int deleted;
+ yaffs_BlockState state;
+ yaffs_Object *hardList = NULL;
+ yaffs_BlockInfo *bi;
+ __u32 sequenceNumber;
+ yaffs_ObjectHeader *oh;
+ yaffs_Object *in;
+ yaffs_Object *parent;
+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
+ int itsUnlinked;
+ __u8 *chunkData;
+
+ int fileSize;
+ int isShrink;
+ int foundChunksInBlock;
+ int equivalentObjectId;
+ int alloc_failed = 0;
+
+
+ yaffs_BlockIndex *blockIndex = NULL;
+ int altBlockIndex = 0;
+
+ T(YAFFS_TRACE_SCAN,
+ (TSTR
+ ("yaffs2_ScanBackwards starts intstartblk %d intendblk %d..."
+ TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
+
+
+ dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
+
+ blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
+
+ if (!blockIndex) {
+ blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
+ altBlockIndex = 1;
+ }
+
+ if (!blockIndex) {
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("yaffs2_ScanBackwards() could not allocate block index!" TENDSTR)));
+ return YAFFS_FAIL;
+ }
+
+ dev->blocksInCheckpoint = 0;
+
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+
+ /* Scan all the blocks to determine their state */
+ bi = dev->blockInfo;
+ for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
+ yaffs_ClearChunkBits(dev, blk);
+ bi->pagesInUse = 0;
+ bi->softDeletions = 0;
+
+ yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
+
+ bi->blockState = state;
+ bi->sequenceNumber = sequenceNumber;
+
+ if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
+ bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
+ if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
+ bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
+
+ T(YAFFS_TRACE_SCAN_DEBUG,
+ (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
+ state, sequenceNumber));
+
+
+ if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
+ dev->blocksInCheckpoint++;
+
+ } else if (state == YAFFS_BLOCK_STATE_DEAD) {
+ T(YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("block %d is bad" TENDSTR), blk));
+ } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
+ T(YAFFS_TRACE_SCAN_DEBUG,
+ (TSTR("Block empty " TENDSTR)));
+ dev->nErasedBlocks++;
+ dev->nFreeChunks += dev->param.nChunksPerBlock;
+ } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+
+ /* Determine the highest sequence number */
+ if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
+ sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
+
+ blockIndex[nBlocksToScan].seq = sequenceNumber;
+ blockIndex[nBlocksToScan].block = blk;
+
+ nBlocksToScan++;
+
+ if (sequenceNumber >= dev->sequenceNumber)
+ dev->sequenceNumber = sequenceNumber;
+ } else {
+ /* TODO: Nasty sequence number! */
+ T(YAFFS_TRACE_SCAN,
+ (TSTR
+ ("Block scanning block %d has bad sequence number %d"
+ TENDSTR), blk, sequenceNumber));
+
+ }
+ }
+ bi++;
+ }
+
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
+
+
+
+ YYIELD();
+
+ /* Sort the blocks by sequence number*/
+ yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), yaffs2_ybicmp);
+
+ YYIELD();
+
+ T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
+
+ /* Now scan the blocks looking at the data. */
+ startIterator = 0;
+ endIterator = nBlocksToScan - 1;
+ T(YAFFS_TRACE_SCAN_DEBUG,
+ (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
+
+ /* For each block.... backwards */
+ for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
+ blockIterator--) {
+ /* Cooperative multitasking! This loop can run for so
+ long that watchdog timers expire. */
+ YYIELD();
+
+ /* get the block to scan in the correct order */
+ blk = blockIndex[blockIterator].block;
+
+ bi = yaffs_GetBlockInfo(dev, blk);
+
+
+ state = bi->blockState;
+
+ deleted = 0;
+
+ /* For each chunk in each block that needs scanning.... */
+ foundChunksInBlock = 0;
+ for (c = dev->param.nChunksPerBlock - 1;
+ !alloc_failed && c >= 0 &&
+ (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+ state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
+ /* Scan backwards...
+ * Read the tags and decide what to do
+ */
+
+ chunk = blk * dev->param.nChunksPerBlock + c;
+
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
+ &tags);
+
+ /* Let's have a good look at this chunk... */
+
+ if (!tags.chunkUsed) {
+ /* An unassigned chunk in the block.
+ * If there are used chunks after this one, then
+ * it is a chunk that was skipped due to failing the erased
+ * check. Just skip it so that it can be deleted.
+ * But, more typically, We get here when this is an unallocated
+ * chunk and his means that either the block is empty or
+ * this is the one being allocated from
+ */
+
+ if (foundChunksInBlock) {
+ /* This is a chunk that was skipped due to failing the erased check */
+ } else if (c == 0) {
+ /* We're looking at the first chunk in the block so the block is unused */
+ state = YAFFS_BLOCK_STATE_EMPTY;
+ dev->nErasedBlocks++;
+ } else {
+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+ state == YAFFS_BLOCK_STATE_ALLOCATING) {
+ if (dev->sequenceNumber == bi->sequenceNumber) {
+ /* this is the block being allocated from */
+
+ T(YAFFS_TRACE_SCAN,
+ (TSTR
+ (" Allocating from %d %d"
+ TENDSTR), blk, c));
+
+ state = YAFFS_BLOCK_STATE_ALLOCATING;
+ dev->allocationBlock = blk;
+ dev->allocationPage = c;
+ dev->allocationBlockFinder = blk;
+ } else {
+ /* This is a partially written block that is not
+ * the current allocation block.
+ */
+
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("Partially written block %d detected" TENDSTR),
+ blk));
+ }
+ }
+ }
+
+ dev->nFreeChunks++;
+
+ } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
+ T(YAFFS_TRACE_SCAN,
+ (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
+ blk, c));
+
+ dev->nFreeChunks++;
+
+ } else if (tags.objectId > YAFFS_MAX_OBJECT_ID ||
+ tags.chunkId > YAFFS_MAX_CHUNK_ID ||
+ (tags.chunkId > 0 && tags.byteCount > dev->nDataBytesPerChunk) ||
+ tags.sequenceNumber != bi->sequenceNumber ) {
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("Chunk (%d:%d) with bad tags:obj = %d, chunkId = %d, byteCount = %d, ignored"TENDSTR),
+ blk, c,tags.objectId, tags.chunkId, tags.byteCount));
+
+ dev->nFreeChunks++;
+
+ } else if (tags.chunkId > 0) {
+ /* chunkId > 0 so it is a data chunk... */
+ unsigned int endpos;
+ __u32 chunkBase =
+ (tags.chunkId - 1) * dev->nDataBytesPerChunk;
+
+ foundChunksInBlock = 1;
+
+
+ yaffs_SetChunkBit(dev, blk, c);
+ bi->pagesInUse++;
+
+ in = yaffs_FindOrCreateObjectByNumber(dev,
+ tags.
+ objectId,
+ YAFFS_OBJECT_TYPE_FILE);
+ if (!in) {
+ /* Out of memory */
+ alloc_failed = 1;
+ }
+
+ if (in &&
+ in->variantType == YAFFS_OBJECT_TYPE_FILE
+ && chunkBase < in->variant.fileVariant.shrinkSize) {
+ /* This has not been invalidated by a resize */
+ if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, -1)) {
+ alloc_failed = 1;
+ }
+
+ /* File size is calculated by looking at the data chunks if we have not
+ * seen an object header yet. Stop this practice once we find an object header.
+ */
+ endpos = chunkBase + tags.byteCount;
+
+ if (!in->valid && /* have not got an object header yet */
+ in->variant.fileVariant.scannedFileSize < endpos) {
+ in->variant.fileVariant.scannedFileSize = endpos;
+ in->variant.fileVariant.fileSize = endpos;
+ }
+
+ } else if (in) {
+ /* This chunk has been invalidated by a resize, or a past file deletion
+ * so delete the chunk*/
+ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+
+ }
+ } else {
+ /* chunkId == 0, so it is an ObjectHeader.
+ * Thus, we read in the object header and make the object
+ */
+ foundChunksInBlock = 1;
+
+ yaffs_SetChunkBit(dev, blk, c);
+ bi->pagesInUse++;
+
+ oh = NULL;
+ in = NULL;
+
+ if (tags.extraHeaderInfoAvailable) {
+ in = yaffs_FindOrCreateObjectByNumber(dev,
+ tags.objectId,
+ tags.extraObjectType);
+ if (!in)
+ alloc_failed = 1;
+ }
+
+ if (!in ||
+ (!in->valid && dev->param.disableLazyLoad) ||
+ tags.extraShadows ||
+ (!in->valid &&
+ (tags.objectId == YAFFS_OBJECTID_ROOT ||
+ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
+
+ /* If we don't have valid info then we need to read the chunk
+ * TODO In future we can probably defer reading the chunk and
+ * living with invalid data until needed.
+ */
+
+ result = yaffs_ReadChunkWithTagsFromNAND(dev,
+ chunk,
+ chunkData,
+ NULL);
+
+ oh = (yaffs_ObjectHeader *) chunkData;
+
+ if (dev->param.inbandTags) {
+ /* Fix up the header if they got corrupted by inband tags */
+ oh->shadowsObject = oh->inbandShadowsObject;
+ oh->isShrink = oh->inbandIsShrink;
+ }
+
+ if (!in) {
+ in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
+ if (!in)
+ alloc_failed = 1;
+ }
+
+ }
+
+ if (!in) {
+ /* TODO Hoosterman we have a problem! */
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
+ TENDSTR), tags.objectId, chunk));
+ continue;
+ }
+
+ if (in->valid) {
+ /* We have already filled this one.
+ * We have a duplicate that will be discarded, but
+ * we first have to suck out resize info if it is a file.
+ */
+
+ if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
+ ((oh &&
+ oh->type == YAFFS_OBJECT_TYPE_FILE) ||
+ (tags.extraHeaderInfoAvailable &&
+ tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
+ __u32 thisSize =
+ (oh) ? oh->fileSize : tags.
+ extraFileLength;
+ __u32 parentObjectId =
+ (oh) ? oh->
+ parentObjectId : tags.
+ extraParentObjectId;
+
+
+ isShrink =
+ (oh) ? oh->isShrink : tags.
+ extraIsShrinkHeader;
+
+ /* If it is deleted (unlinked at start also means deleted)
+ * we treat the file size as being zeroed at this point.
+ */
+ if (parentObjectId ==
+ YAFFS_OBJECTID_DELETED
+ || parentObjectId ==
+ YAFFS_OBJECTID_UNLINKED) {
+ thisSize = 0;
+ isShrink = 1;
+ }
+
+ if (isShrink && in->variant.fileVariant.shrinkSize > thisSize)
+ in->variant.fileVariant.shrinkSize = thisSize;
+
+ if (isShrink)
+ bi->hasShrinkHeader = 1;
+
+ }
+ /* Use existing - destroy this one. */
+ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+
+ }
+
+ if (!in->valid && in->variantType !=
+ (oh ? oh->type : tags.extraObjectType))
+ T(YAFFS_TRACE_ERROR, (
+ TSTR("yaffs tragedy: Bad object type, "
+ TCONT("%d != %d, for object %d at chunk ")
+ TCONT("%d during scan")
+ TENDSTR), oh ?
+ oh->type : tags.extraObjectType,
+ in->variantType, tags.objectId,
+ chunk));
+
+ if (!in->valid &&
+ (tags.objectId == YAFFS_OBJECTID_ROOT ||
+ tags.objectId ==
+ YAFFS_OBJECTID_LOSTNFOUND)) {
+ /* We only load some info, don't fiddle with directory structure */
+ in->valid = 1;
+
+ if (oh) {
+
+ in->yst_mode = oh->yst_mode;
+#ifdef CONFIG_YAFFS_WINCE
+ in->win_atime[0] = oh->win_atime[0];
+ in->win_ctime[0] = oh->win_ctime[0];
+ in->win_mtime[0] = oh->win_mtime[0];
+ in->win_atime[1] = oh->win_atime[1];
+ in->win_ctime[1] = oh->win_ctime[1];
+ in->win_mtime[1] = oh->win_mtime[1];
+#else
+ in->yst_uid = oh->yst_uid;
+ in->yst_gid = oh->yst_gid;
+ in->yst_atime = oh->yst_atime;
+ in->yst_mtime = oh->yst_mtime;
+ in->yst_ctime = oh->yst_ctime;
+ in->yst_rdev = oh->yst_rdev;
+
+ in->lazyLoaded = 0;
+
+#endif
+ } else
+ in->lazyLoaded = 1;
+
+ in->hdrChunk = chunk;
+
+ } else if (!in->valid) {
+ /* we need to load this info */
+
+ in->valid = 1;
+ in->hdrChunk = chunk;
+
+ if (oh) {
+ in->variantType = oh->type;
+
+ in->yst_mode = oh->yst_mode;
+#ifdef CONFIG_YAFFS_WINCE
+ in->win_atime[0] = oh->win_atime[0];
+ in->win_ctime[0] = oh->win_ctime[0];
+ in->win_mtime[0] = oh->win_mtime[0];
+ in->win_atime[1] = oh->win_atime[1];
+ in->win_ctime[1] = oh->win_ctime[1];
+ in->win_mtime[1] = oh->win_mtime[1];
+#else
+ in->yst_uid = oh->yst_uid;
+ in->yst_gid = oh->yst_gid;
+ in->yst_atime = oh->yst_atime;
+ in->yst_mtime = oh->yst_mtime;
+ in->yst_ctime = oh->yst_ctime;
+ in->yst_rdev = oh->yst_rdev;
+#endif
+
+ if (oh->shadowsObject > 0)
+ yaffs_HandleShadowedObject(dev,
+ oh->
+ shadowsObject,
+ 1);
+
+
+
+ yaffs_SetObjectNameFromOH(in, oh);
+ parent =
+ yaffs_FindOrCreateObjectByNumber
+ (dev, oh->parentObjectId,
+ YAFFS_OBJECT_TYPE_DIRECTORY);
+
+ fileSize = oh->fileSize;
+ isShrink = oh->isShrink;
+ equivalentObjectId = oh->equivalentObjectId;
+
+ } else {
+ in->variantType = tags.extraObjectType;
+ parent =
+ yaffs_FindOrCreateObjectByNumber
+ (dev, tags.extraParentObjectId,
+ YAFFS_OBJECT_TYPE_DIRECTORY);
+ fileSize = tags.extraFileLength;
+ isShrink = tags.extraIsShrinkHeader;
+ equivalentObjectId = tags.extraEquivalentObjectId;
+ in->lazyLoaded = 1;
+
+ }
+ in->dirty = 0;
+
+ if (!parent)
+ alloc_failed = 1;
+
+ /* directory stuff...
+ * hook up to parent
+ */
+
+ if (parent && parent->variantType ==
+ YAFFS_OBJECT_TYPE_UNKNOWN) {
+ /* Set up as a directory */
+ parent->variantType =
+ YAFFS_OBJECT_TYPE_DIRECTORY;
+ YINIT_LIST_HEAD(&parent->variant.
+ directoryVariant.
+ children);
+ } else if (!parent || parent->variantType !=
+ YAFFS_OBJECT_TYPE_DIRECTORY) {
+ /* Hoosterman, another problem....
+ * We're trying to use a non-directory as a directory
+ */
+
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
+ TENDSTR)));
+ parent = dev->lostNFoundDir;
+ }
+
+ yaffs_AddObjectToDirectory(parent, in);
+
+ itsUnlinked = (parent == dev->deletedDir) ||
+ (parent == dev->unlinkedDir);
+
+ if (isShrink) {
+ /* Mark the block as having a shrinkHeader */
+ bi->hasShrinkHeader = 1;
+ }
+
+ /* Note re hardlinks.
+ * Since we might scan a hardlink before its equivalent object is scanned
+ * we put them all in a list.
+ * After scanning is complete, we should have all the objects, so we run
+ * through this list and fix up all the chains.
+ */
+
+ switch (in->variantType) {
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ /* Todo got a problem */
+ break;
+ case YAFFS_OBJECT_TYPE_FILE:
+
+ if (in->variant.fileVariant.
+ scannedFileSize < fileSize) {
+ /* This covers the case where the file size is greater
+ * than where the data is
+ * This will happen if the file is resized to be larger
+ * than its current data extents.
+ */
+ in->variant.fileVariant.fileSize = fileSize;
+ in->variant.fileVariant.scannedFileSize = fileSize;
+ }
+
+ if (in->variant.fileVariant.shrinkSize > fileSize)
+ in->variant.fileVariant.shrinkSize = fileSize;
+
+
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ if (!itsUnlinked) {
+ in->variant.hardLinkVariant.equivalentObjectId =
+ equivalentObjectId;
+ in->hardLinks.next =
+ (struct ylist_head *) hardList;
+ hardList = in;
+ }
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ if (oh) {
+ in->variant.symLinkVariant.alias =
+ yaffs_CloneString(oh->alias);
+ if (!in->variant.symLinkVariant.alias)
+ alloc_failed = 1;
+ }
+ break;
+ }
+
+ }
+
+ }
+
+ } /* End of scanning for each chunk */
+
+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+ /* If we got this far while scanning, then the block is fully allocated. */
+ state = YAFFS_BLOCK_STATE_FULL;
+ }
+
+
+ bi->blockState = state;
+
+ /* Now let's see if it was dirty */
+ if (bi->pagesInUse == 0 &&
+ !bi->hasShrinkHeader &&
+ bi->blockState == YAFFS_BLOCK_STATE_FULL) {
+ yaffs_BlockBecameDirty(dev, blk);
+ }
+
+ }
+
+ yaffs_SkipRestOfBlock(dev);
+
+ if (altBlockIndex)
+ YFREE_ALT(blockIndex);
+ else
+ YFREE(blockIndex);
+
+ /* Ok, we've done all the scanning.
+ * Fix up the hard link chains.
+ * We should now have scanned all the objects, now it's time to add these
+ * hardlinks.
+ */
+ yaffs_HardlinkFixup(dev, hardList);
+
+
+ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+
+ if (alloc_failed)
+ return YAFFS_FAIL;
+
+ T(YAFFS_TRACE_SCAN, (TSTR("yaffs2_ScanBackwards ends" TENDSTR)));
+
+ return YAFFS_OK;
+}
diff -Nrup a/fs/yaffs2/yaffs_yaffs2.h b/fs/yaffs2/yaffs_yaffs2.h
--- a/fs/yaffs2/yaffs_yaffs2.h 1970-01-01 02:00:00.000000000 +0200
+++ b/fs/yaffs2/yaffs_yaffs2.h 2010-10-03 18:03:47.552000367 +0300
@@ -0,0 +1,36 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __YAFFS_YAFFS2_H__
+#define __YAFFS_YAFFS2_H__
+
+#include "yaffs_guts.h"
+
+void yaffs2_CalcOldestDirtySequence(yaffs_Device *dev);
+void yaffs2_FindOldestDirtySequence(yaffs_Device *dev);
+void yaffs2_ClearOldestDirtySequence(yaffs_Device *dev, yaffs_BlockInfo *bi);
+void yaffs2_UpdateOldestDirtySequence(yaffs_Device *dev, unsigned blockNo, yaffs_BlockInfo *bi);
+int yaffs2_BlockNotDisqualifiedFromGC(yaffs_Device *dev, yaffs_BlockInfo *bi);
+__u32 yaffs2_FindRefreshBlock(yaffs_Device *dev);
+int yaffs2_CheckpointRequired(yaffs_Device *dev);
+int yaffs2_CalcCheckpointBlocksRequired(yaffs_Device *dev);
+
+
+void yaffs2_InvalidateCheckpoint(yaffs_Device *dev);
+int yaffs2_CheckpointSave(yaffs_Device *dev);
+int yaffs2_CheckpointRestore(yaffs_Device *dev);
+
+int yaffs2_HandleHole(yaffs_Object *obj, loff_t newSize);
+int yaffs2_ScanBackwards(yaffs_Device *dev);
+
+#endif
diff -Nrup a/fs/yaffs2/yportenv.h b/fs/yaffs2/yportenv.h
--- a/fs/yaffs2/yportenv.h 2010-10-03 17:48:22.725000364 +0300
+++ b/fs/yaffs2/yportenv.h 2010-10-03 18:03:47.555000363 +0300
@@ -1,7 +1,7 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
@@ -41,12 +41,14 @@
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
#include <linux/config.h>
#endif
+
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
+#include <linux/xattr.h>
#define YCHAR char
#define YUCHAR unsigned char
@@ -55,11 +57,11 @@
#define yaffs_strcpy(a, b) strcpy(a, b)
#define yaffs_strncpy(a, b, c) strncpy(a, b, c)
#define yaffs_strncmp(a, b, c) strncmp(a, b, c)
-#define yaffs_strlen(s) strlen(s)
+#define yaffs_strnlen(s,m) strnlen(s,m)
#define yaffs_sprintf sprintf
#define yaffs_toupper(a) toupper(a)
-#define Y_INLINE inline
+#define Y_INLINE __inline__
#define YAFFS_LOSTNFOUND_NAME "lost+found"
#define YAFFS_LOSTNFOUND_PREFIX "obj"
@@ -71,11 +73,11 @@
#define YFREE_ALT(x) vfree(x)
#define YMALLOC_DMA(x) YMALLOC(x)
-/* KR - added for use in scan so processes aren't blocked indefinitely. */
#define YYIELD() schedule()
+#define Y_DUMP_STACK() dump_stack()
-#define YAFFS_ROOT_MODE 0666
-#define YAFFS_LOSTNFOUND_MODE 0666
+#define YAFFS_ROOT_MODE 0755
+#define YAFFS_LOSTNFOUND_MODE 0700
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
#define Y_CURRENT_TIME CURRENT_TIME.tv_sec
@@ -89,15 +91,10 @@
#define yaffs_strcmp(a, b) strcmp(a, b)
#define TENDSTR "\n"
-#define TSTR(x) KERN_WARNING x
+#define TSTR(x) KERN_DEBUG x
#define TCONT(x) x
#define TOUT(p) printk p
-#define yaffs_trace(mask, fmt, args...) \
- do { if ((mask) & (yaffs_traceMask|YAFFS_TRACE_ERROR)) \
- printk(KERN_WARNING "yaffs: " fmt, ## args); \
- } while (0)
-
#define compile_time_assertion(assertion) \
({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; })
@@ -116,7 +113,6 @@
#include "stdio.h"
#include "string.h"
-#include "devextras.h"
#define YMALLOC(x) malloc(x)
#define YFREE(x) free(x)
@@ -129,7 +125,7 @@
#define yaffs_strcat(a, b) strcat(a, b)
#define yaffs_strcpy(a, b) strcpy(a, b)
#define yaffs_strncpy(a, b, c) strncpy(a, b, c)
-#define yaffs_strlen(s) strlen(s)
+#define yaffs_strnlen(s,m) strnlen(s,m)
#define yaffs_sprintf sprintf
#define yaffs_toupper(a) toupper(a)
@@ -146,8 +142,8 @@
#define YAFFS_LOSTNFOUND_PREFIX "obj"
/* #define YPRINTF(x) printf x */
-#define YAFFS_ROOT_MODE 0666
-#define YAFFS_LOSTNFOUND_MODE 0666
+#define YAFFS_ROOT_MODE 0755
+#define YAFFS_LOSTNFOUND_MODE 0700
#define yaffs_SumCompare(x, y) ((x) == (y))
#define yaffs_strcmp(a, b) strcmp(a, b)
@@ -158,46 +154,180 @@
#endif
-/* see yaffs_fs.c */
-extern unsigned int yaffs_traceMask;
-extern unsigned int yaffs_wr_attempts;
+#if defined(CONFIG_YAFFS_DIRECT) || defined(CONFIG_YAFFS_WINCE)
-/*
- * Tracing flags.
- * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
- */
+#ifdef CONFIG_YAFFSFS_PROVIDE_VALUES
+
+#ifndef O_RDONLY
+#define O_RDONLY 00
+#endif
+
+#ifndef O_WRONLY
+#define O_WRONLY 01
+#endif
+
+#ifndef O_RDWR
+#define O_RDWR 02
+#endif
+
+#ifndef O_CREAT
+#define O_CREAT 0100
+#endif
+
+#ifndef O_EXCL
+#define O_EXCL 0200
+#endif
+
+#ifndef O_TRUNC
+#define O_TRUNC 01000
+#endif
+
+#ifndef O_APPEND
+#define O_APPEND 02000
+#endif
+
+#ifndef SEEK_SET
+#define SEEK_SET 0
+#endif
+
+#ifndef SEEK_CUR
+#define SEEK_CUR 1
+#endif
+
+#ifndef SEEK_END
+#define SEEK_END 2
+#endif
+
+#ifndef EBUSY
+#define EBUSY 16
+#endif
+
+#ifndef ENODEV
+#define ENODEV 19
+#endif
+
+#ifndef EINVAL
+#define EINVAL 22
+#endif
+
+#ifndef EBADF
+#define EBADF 9
+#endif
+
+#ifndef EACCES
+#define EACCES 13
+#endif
+
+#ifndef EXDEV
+#define EXDEV 18
+#endif
+
+#ifndef ENOENT
+#define ENOENT 2
+#endif
+
+#ifndef ENOSPC
+#define ENOSPC 28
+#endif
+
+#ifndef ERANGE
+#define ERANGE 34
+#endif
+
+#ifndef ENODATA
+#define ENODATA 61
+#endif
+
+#ifndef ENOTEMPTY
+#define ENOTEMPTY 39
+#endif
+
+#ifndef ENAMETOOLONG
+#define ENAMETOOLONG 36
+#endif
+
+#ifndef ENOMEM
+#define ENOMEM 12
+#endif
+
+#ifndef EEXIST
+#define EEXIST 17
+#endif
+
+#ifndef ENOTDIR
+#define ENOTDIR 20
+#endif
+
+#ifndef EISDIR
+#define EISDIR 21
+#endif
+
+
+// Mode flags
+
+#ifndef S_IFMT
+#define S_IFMT 0170000
+#endif
+
+#ifndef S_IFLNK
+#define S_IFLNK 0120000
+#endif
-#define YAFFS_TRACE_OS 0x00000002
-#define YAFFS_TRACE_ALLOCATE 0x00000004
-#define YAFFS_TRACE_SCAN 0x00000008
-#define YAFFS_TRACE_BAD_BLOCKS 0x00000010
-#define YAFFS_TRACE_ERASE 0x00000020
-#define YAFFS_TRACE_GC 0x00000040
-#define YAFFS_TRACE_WRITE 0x00000080
-#define YAFFS_TRACE_TRACING 0x00000100
-#define YAFFS_TRACE_DELETION 0x00000200
-#define YAFFS_TRACE_BUFFERS 0x00000400
-#define YAFFS_TRACE_NANDACCESS 0x00000800
-#define YAFFS_TRACE_GC_DETAIL 0x00001000
-#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
-#define YAFFS_TRACE_MTD 0x00004000
-#define YAFFS_TRACE_CHECKPOINT 0x00008000
-
-#define YAFFS_TRACE_VERIFY 0x00010000
-#define YAFFS_TRACE_VERIFY_NAND 0x00020000
-#define YAFFS_TRACE_VERIFY_FULL 0x00040000
-#define YAFFS_TRACE_VERIFY_ALL 0x000F0000
-
-
-#define YAFFS_TRACE_ERROR 0x40000000
-#define YAFFS_TRACE_BUG 0x80000000
-#define YAFFS_TRACE_ALWAYS 0xF0000000
+#ifndef S_IFDIR
+#define S_IFDIR 0040000
+#endif
+
+#ifndef S_IFREG
+#define S_IFREG 0100000
+#endif
+#ifndef S_IREAD
+#define S_IREAD 0000400
+#endif
+
+#ifndef S_IWRITE
+#define S_IWRITE 0000200
+#endif
-#define T(mask, p) do { if ((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p); } while (0)
+#ifndef S_IEXEC
+#define S_IEXEC 0000100
+#endif
+
+#ifndef XATTR_CREATE
+#define XATTR_CREATE 1
+#endif
+
+#ifndef XATTR_REPLACE
+#define XATTR_REPLACE 2
+#endif
+
+#ifndef R_OK
+#define R_OK 4
+#define W_OK 2
+#define X_OK 1
+#define F_OK 0
+#endif
+
+#else
+#include <errno.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#endif
+
+#endif
+
+#ifndef Y_DUMP_STACK
+#define Y_DUMP_STACK() do { } while (0)
+#endif
#ifndef YBUG
-#define YBUG() do {T(YAFFS_TRACE_BUG, (TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR), __LINE__)); } while (0)
+#define YBUG() do {\
+ T(YAFFS_TRACE_BUG,\
+ (TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),\
+ __LINE__));\
+ Y_DUMP_STACK();\
+} while (0)
#endif
+
#endif
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