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 @@ -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 @@ -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 + * + * 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 + * + * 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 + * + * 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 + * + * 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 @@ -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 @@ -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 @@ -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 $"; - #include "yportenv.h" #include "yaffs_ecc.h" diff -Nrup a/fs/yaffs2/yaffs_ecc.h b/fs/yaffs2/yaffs_ecc.h --- a/fs/yaffs2/yaffs_ecc.h 2010-10-03 17:48:22.707000363 +0300 +++ b/fs/yaffs2/yaffs_ecc.h 2010-10-03 18:03:47.541000359 +0300 @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2010 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning diff -Nrup a/fs/yaffs2/yaffs_fs.c b/fs/yaffs2/yaffs_fs.c --- a/fs/yaffs2/yaffs_fs.c 2010-10-03 17:48:22.708000363 +0300 +++ b/fs/yaffs2/yaffs_fs.c 1970-01-01 02:00:00.000000000 +0200 @@ -1,2529 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2009 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning - * Acknowledgements: - * Luc van OostenRyck for numerous patches. - * Nick Bane for numerous patches. - * Nick Bane for 2.5/2.6 integration. - * Andras Toth for mknod rdev issue. - * Michael Fischer for finding the problem with inode inconsistency. - * Some code bodily lifted from JFFS - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * - * This is the file system front-end to YAFFS that hooks it up to - * the VFS. - * - * Special notes: - * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with - * this superblock - * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this - * superblock - * >> inode->u.generic_ip points to the associated yaffs_Object. - */ - -const char *yaffs_fs_c_version = - "$Id: yaffs_fs.c,v 1.79 2009-03-17 01:12:00 wookey Exp $"; -extern const char *yaffs_guts_c_version; - -#include -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)) -#include -#endif -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "asm/div64.h" - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) - -#include /* Added NCB 15-8-2003 */ -#include -#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 -#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 - -#include "yportenv.h" -#include "yaffs_guts.h" - -#include -#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 @@ -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 @@ -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<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<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 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 @@ -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 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 + * + * 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 + * + * 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 + * + * 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 ) - 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 -To: David Goodenough -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 , - Charles Manning -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 @@ -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 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 @@ -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 @@ -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 + * + * 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 + * + * 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 @@ -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 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 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 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 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 @@ -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 @@ -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 @@ -17,7 +17,18 @@ #ifndef __YAFFS_QSORT_H__ #define __YAFFS_QSORT_H__ +#ifdef __KERNEL__ +#include + +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 @@ -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 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 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 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 + * + * 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 + * + * 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<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 + * + * 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 + * 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 + +#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 +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#if (YAFFS_NEW_FOLLOW_LINK == 1) +#include +#endif + +#ifdef YAFFS_COMPILE_EXPORTFS +#include +#endif + +#ifdef YAFFS_COMPILE_BACKGROUND +#include +#include +#endif +#ifdef YAFFS_COMPILE_FREEZER +#include +#endif + +#include + +#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) + +#include + +#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 +#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 +#include + +#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 + * + * 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 + * + * 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 + * + * 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<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 + * + * 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 @@ -41,12 +41,14 @@ #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)) #include #endif + #include #include #include #include #include #include +#include #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 +#include +#include +#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