mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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7bf7027431
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11427 3c298f89-4303-0410-b956-a3cf2f4a3e73
7470 lines
178 KiB
C
7470 lines
178 KiB
C
/*
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* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2007 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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const char *yaffs_guts_c_version =
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"$Id: yaffs_guts.c,v 1.49 2007-05-15 20:07:40 charles Exp $";
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#include "yportenv.h"
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#include "yaffsinterface.h"
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#include "yaffs_guts.h"
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#include "yaffs_tagsvalidity.h"
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#include "yaffs_tagscompat.h"
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#ifndef CONFIG_YAFFS_USE_OWN_SORT
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#include "yaffs_qsort.h"
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#endif
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#include "yaffs_nand.h"
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#include "yaffs_checkptrw.h"
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#include "yaffs_nand.h"
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#include "yaffs_packedtags2.h"
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#ifdef CONFIG_YAFFS_WINCE
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void yfsd_LockYAFFS(BOOL fsLockOnly);
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void yfsd_UnlockYAFFS(BOOL fsLockOnly);
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#endif
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#define YAFFS_PASSIVE_GC_CHUNKS 2
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#include "yaffs_ecc.h"
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/* Robustification (if it ever comes about...) */
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static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND);
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static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk);
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static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
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const __u8 * data,
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const yaffs_ExtendedTags * tags);
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static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
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const yaffs_ExtendedTags * tags);
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/* Other local prototypes */
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static int yaffs_UnlinkObject( yaffs_Object *obj);
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static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
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static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
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static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device * dev,
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const __u8 * buffer,
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yaffs_ExtendedTags * tags,
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int useReserve);
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static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode,
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int chunkInNAND, int inScan);
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static yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number,
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yaffs_ObjectType type);
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static void yaffs_AddObjectToDirectory(yaffs_Object * directory,
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yaffs_Object * obj);
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static int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name,
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int force, int isShrink, int shadows);
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static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj);
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static int yaffs_CheckStructures(void);
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static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level,
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int chunkOffset, int *limit);
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static int yaffs_DoGenericObjectDeletion(yaffs_Object * in);
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static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blockNo);
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static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo);
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static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer,
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int lineNo);
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static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
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int chunkInNAND);
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static int yaffs_UnlinkWorker(yaffs_Object * obj);
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static void yaffs_DestroyObject(yaffs_Object * obj);
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static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId,
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int chunkInObject);
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loff_t yaffs_GetFileSize(yaffs_Object * obj);
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static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr);
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static void yaffs_VerifyFreeChunks(yaffs_Device * dev);
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static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
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#ifdef YAFFS_PARANOID
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static int yaffs_CheckFileSanity(yaffs_Object * in);
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#else
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#define yaffs_CheckFileSanity(in)
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#endif
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static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in);
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static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId);
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static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
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static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode,
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yaffs_ExtendedTags * tags);
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static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos);
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static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev,
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yaffs_FileStructure * fStruct,
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__u32 chunkId);
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/* Function to calculate chunk and offset */
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static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, __u32 *chunk, __u32 *offset)
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{
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if(dev->chunkShift){
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/* Easy-peasy power of 2 case */
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*chunk = (__u32)(addr >> dev->chunkShift);
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*offset = (__u32)(addr & dev->chunkMask);
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}
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else if(dev->crumbsPerChunk)
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{
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/* Case where we're using "crumbs" */
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*offset = (__u32)(addr & dev->crumbMask);
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addr >>= dev->crumbShift;
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*chunk = ((__u32)addr)/dev->crumbsPerChunk;
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*offset += ((addr - (*chunk * dev->crumbsPerChunk)) << dev->crumbShift);
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}
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else
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YBUG();
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}
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/* Function to return the number of shifts for a power of 2 greater than or equal
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* to the given number
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* Note we don't try to cater for all possible numbers and this does not have to
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* be hellishly efficient.
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*/
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static __u32 ShiftsGE(__u32 x)
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{
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int extraBits;
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int nShifts;
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nShifts = extraBits = 0;
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while(x>1){
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if(x & 1) extraBits++;
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x>>=1;
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nShifts++;
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}
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if(extraBits)
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nShifts++;
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return nShifts;
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}
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/* Function to return the number of shifts to get a 1 in bit 0
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*/
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static __u32 ShiftDiv(__u32 x)
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{
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int nShifts;
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nShifts = 0;
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if(!x) return 0;
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while( !(x&1)){
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x>>=1;
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nShifts++;
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}
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return nShifts;
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}
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/*
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* Temporary buffer manipulations.
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*/
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static int yaffs_InitialiseTempBuffers(yaffs_Device *dev)
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{
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int i;
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__u8 *buf = (__u8 *)1;
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memset(dev->tempBuffer,0,sizeof(dev->tempBuffer));
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for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
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dev->tempBuffer[i].line = 0; /* not in use */
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dev->tempBuffer[i].buffer = buf =
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YMALLOC_DMA(dev->nDataBytesPerChunk);
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}
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return buf ? YAFFS_OK : YAFFS_FAIL;
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}
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static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo)
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{
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int i, j;
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for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
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if (dev->tempBuffer[i].line == 0) {
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dev->tempBuffer[i].line = lineNo;
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if ((i + 1) > dev->maxTemp) {
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dev->maxTemp = i + 1;
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for (j = 0; j <= i; j++)
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dev->tempBuffer[j].maxLine =
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dev->tempBuffer[j].line;
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}
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return dev->tempBuffer[i].buffer;
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}
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}
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T(YAFFS_TRACE_BUFFERS,
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(TSTR("Out of temp buffers at line %d, other held by lines:"),
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lineNo));
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for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
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T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line));
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}
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T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR)));
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/*
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* If we got here then we have to allocate an unmanaged one
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* This is not good.
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*/
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dev->unmanagedTempAllocations++;
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return YMALLOC(dev->nDataBytesPerChunk);
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}
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static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer,
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int lineNo)
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{
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int i;
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for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
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if (dev->tempBuffer[i].buffer == buffer) {
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dev->tempBuffer[i].line = 0;
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return;
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}
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}
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if (buffer) {
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/* assume it is an unmanaged one. */
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T(YAFFS_TRACE_BUFFERS,
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(TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),
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lineNo));
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YFREE(buffer);
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dev->unmanagedTempDeallocations++;
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}
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}
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/*
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* Determine if we have a managed buffer.
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*/
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int yaffs_IsManagedTempBuffer(yaffs_Device * dev, const __u8 * buffer)
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{
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int i;
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for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
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if (dev->tempBuffer[i].buffer == buffer)
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return 1;
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}
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for (i = 0; i < dev->nShortOpCaches; i++) {
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if( dev->srCache[i].data == buffer )
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return 1;
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}
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if (buffer == dev->checkpointBuffer)
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return 1;
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T(YAFFS_TRACE_ALWAYS,
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(TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
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return 0;
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}
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/*
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* Chunk bitmap manipulations
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*/
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static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device * dev, int blk)
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{
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if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
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T(YAFFS_TRACE_ERROR,
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(TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
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blk));
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YBUG();
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}
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return dev->chunkBits +
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(dev->chunkBitmapStride * (blk - dev->internalStartBlock));
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}
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static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
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{
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if(blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
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chunk < 0 || chunk >= dev->nChunksPerBlock) {
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T(YAFFS_TRACE_ERROR,
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(TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),blk,chunk));
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YBUG();
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}
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}
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static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device * dev, int blk)
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{
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__u8 *blkBits = yaffs_BlockBits(dev, blk);
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memset(blkBits, 0, dev->chunkBitmapStride);
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}
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static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device * dev, int blk, int chunk)
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{
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__u8 *blkBits = yaffs_BlockBits(dev, blk);
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yaffs_VerifyChunkBitId(dev,blk,chunk);
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blkBits[chunk / 8] &= ~(1 << (chunk & 7));
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}
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static Y_INLINE void yaffs_SetChunkBit(yaffs_Device * dev, int blk, int chunk)
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{
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__u8 *blkBits = yaffs_BlockBits(dev, blk);
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yaffs_VerifyChunkBitId(dev,blk,chunk);
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blkBits[chunk / 8] |= (1 << (chunk & 7));
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}
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static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device * dev, int blk, int chunk)
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{
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__u8 *blkBits = yaffs_BlockBits(dev, blk);
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yaffs_VerifyChunkBitId(dev,blk,chunk);
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return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
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}
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static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device * dev, int blk)
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{
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__u8 *blkBits = yaffs_BlockBits(dev, blk);
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int i;
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for (i = 0; i < dev->chunkBitmapStride; i++) {
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if (*blkBits)
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return 1;
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blkBits++;
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}
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return 0;
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}
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static int yaffs_CountChunkBits(yaffs_Device * dev, int blk)
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{
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__u8 *blkBits = yaffs_BlockBits(dev, blk);
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int i;
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int n = 0;
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for (i = 0; i < dev->chunkBitmapStride; i++) {
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__u8 x = *blkBits;
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while(x){
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if(x & 1)
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n++;
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x >>=1;
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}
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blkBits++;
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}
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return n;
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}
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/*
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* Verification code
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*/
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static int yaffs_SkipVerification(yaffs_Device *dev)
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{
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return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
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}
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static int yaffs_SkipFullVerification(yaffs_Device *dev)
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{
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return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
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}
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static int yaffs_SkipNANDVerification(yaffs_Device *dev)
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{
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return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
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}
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static const char * blockStateName[] = {
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"Unknown",
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"Needs scanning",
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"Scanning",
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"Empty",
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"Allocating",
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"Full",
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"Dirty",
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"Checkpoint",
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"Collecting",
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"Dead"
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};
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static void yaffs_VerifyBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n)
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{
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int actuallyUsed;
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int inUse;
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if(yaffs_SkipVerification(dev))
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return;
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/* Report illegal runtime states */
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if(bi->blockState <0 || bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
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T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has undefined state %d"TENDSTR),n,bi->blockState));
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switch(bi->blockState){
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case YAFFS_BLOCK_STATE_UNKNOWN:
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case YAFFS_BLOCK_STATE_SCANNING:
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case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
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T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has bad run-state %s"TENDSTR),
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n,blockStateName[bi->blockState]));
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}
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/* Check pages in use and soft deletions are legal */
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actuallyUsed = bi->pagesInUse - bi->softDeletions;
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if(bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
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bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
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actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
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T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
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n,bi->pagesInUse,bi->softDeletions));
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/* Check chunk bitmap legal */
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inUse = yaffs_CountChunkBits(dev,n);
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if(inUse != bi->pagesInUse)
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T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
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n,bi->pagesInUse,inUse));
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/* Check that the sequence number is valid.
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* Ten million is legal, but is very unlikely
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*/
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if(dev->isYaffs2 &&
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(bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
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(bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000 ))
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T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has suspect sequence number of %d"TENDSTR),
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n,bi->sequenceNumber));
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}
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static void yaffs_VerifyCollectedBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n)
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{
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yaffs_VerifyBlock(dev,bi,n);
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/* After collection the block should be in the erased state */
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/* TODO: This will need to change if we do partial gc */
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if(bi->blockState != YAFFS_BLOCK_STATE_EMPTY){
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T(YAFFS_TRACE_ERROR,(TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
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n,bi->blockState));
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}
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}
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static void yaffs_VerifyBlocks(yaffs_Device *dev)
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{
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int i;
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int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
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int nIllegalBlockStates = 0;
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if(yaffs_SkipVerification(dev))
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return;
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memset(nBlocksPerState,0,sizeof(nBlocksPerState));
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for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++){
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yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i);
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yaffs_VerifyBlock(dev,bi,i);
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if(bi->blockState >=0 && bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
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nBlocksPerState[bi->blockState]++;
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else
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nIllegalBlockStates++;
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}
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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.
|
|
*/
|
|
static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
|
|
{
|
|
if(yaffs_SkipVerification(obj->myDev))
|
|
return;
|
|
|
|
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(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));
|
|
}
|
|
|
|
|
|
|
|
static int yaffs_VerifyTnodeWorker(yaffs_Object * obj, yaffs_Tnode * tn,
|
|
__u32 level, int chunkOffset)
|
|
{
|
|
int i;
|
|
yaffs_Device *dev = obj->myDev;
|
|
int ok = 1;
|
|
int nTnodeBytes = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
|
|
|
|
if (tn) {
|
|
if (level > 0) {
|
|
|
|
for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){
|
|
if (tn->internal[i]) {
|
|
ok = yaffs_VerifyTnodeWorker(obj,
|
|
tn->internal[i],
|
|
level - 1,
|
|
(chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
|
|
}
|
|
}
|
|
} else if (level == 0) {
|
|
int i;
|
|
yaffs_ExtendedTags tags;
|
|
__u32 objectId = obj->objectId;
|
|
|
|
chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
|
|
|
|
for(i = 0; i < YAFFS_NTNODES_LEVEL0; i++){
|
|
__u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
|
|
|
|
if(theChunk > 0){
|
|
/* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
|
|
yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags);
|
|
if(tags.objectId != objectId || tags.chunkId != chunkOffset){
|
|
T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
|
|
objectId, chunkOffset, theChunk,
|
|
tags.objectId, tags.chunkId));
|
|
}
|
|
}
|
|
chunkOffset++;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ok;
|
|
|
|
}
|
|
|
|
|
|
static void yaffs_VerifyFile(yaffs_Object *obj)
|
|
{
|
|
int requiredTallness;
|
|
int actualTallness;
|
|
__u32 lastChunk;
|
|
__u32 x;
|
|
__u32 i;
|
|
int ok;
|
|
yaffs_Device *dev;
|
|
yaffs_ExtendedTags tags;
|
|
yaffs_Tnode *tn;
|
|
__u32 objectId;
|
|
|
|
if(obj && 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;
|
|
|
|
if(requiredTallness > actualTallness )
|
|
T(YAFFS_TRACE_VERIFY,
|
|
(TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
|
|
obj->objectId,actualTallness, requiredTallness));
|
|
|
|
|
|
/* 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));
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
static void yaffs_VerifyDirectory(yaffs_Object *obj)
|
|
{
|
|
if(obj && yaffs_SkipVerification(obj->myDev))
|
|
return;
|
|
|
|
}
|
|
|
|
static void yaffs_VerifyHardLink(yaffs_Object *obj)
|
|
{
|
|
if(obj && yaffs_SkipVerification(obj->myDev))
|
|
return;
|
|
|
|
/* Verify sane equivalent object */
|
|
}
|
|
|
|
static void yaffs_VerifySymlink(yaffs_Object *obj)
|
|
{
|
|
if(obj && yaffs_SkipVerification(obj->myDev))
|
|
return;
|
|
|
|
/* Verify symlink string */
|
|
}
|
|
|
|
static void yaffs_VerifySpecial(yaffs_Object *obj)
|
|
{
|
|
if(obj && yaffs_SkipVerification(obj->myDev))
|
|
return;
|
|
}
|
|
|
|
static void yaffs_VerifyObject(yaffs_Object *obj)
|
|
{
|
|
yaffs_Device *dev;
|
|
|
|
__u32 chunkMin;
|
|
__u32 chunkMax;
|
|
|
|
__u32 chunkIdOk;
|
|
__u32 chunkIsLive;
|
|
|
|
if(!obj)
|
|
return;
|
|
|
|
dev = obj->myDev;
|
|
|
|
if(yaffs_SkipVerification(dev))
|
|
return;
|
|
|
|
/* Check sane object header chunk */
|
|
|
|
chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
|
|
chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
|
|
|
|
chunkIdOk = (obj->chunkId >= chunkMin && obj->chunkId <= chunkMax);
|
|
chunkIsLive = chunkIdOk &&
|
|
yaffs_CheckChunkBit(dev,
|
|
obj->chunkId / dev->nChunksPerBlock,
|
|
obj->chunkId % dev->nChunksPerBlock);
|
|
if(!obj->fake &&
|
|
(!chunkIdOk || !chunkIsLive)) {
|
|
T(YAFFS_TRACE_VERIFY,
|
|
(TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
|
|
obj->objectId,obj->chunkId,
|
|
chunkIdOk ? "" : ",out of range",
|
|
chunkIsLive || !chunkIdOk ? "" : ",marked as deleted"));
|
|
}
|
|
|
|
if(chunkIdOk && chunkIsLive &&!yaffs_SkipNANDVerification(dev)) {
|
|
yaffs_ExtendedTags tags;
|
|
yaffs_ObjectHeader *oh;
|
|
__u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
|
|
|
|
oh = (yaffs_ObjectHeader *)buffer;
|
|
|
|
yaffs_ReadChunkWithTagsFromNAND(dev, obj->chunkId,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;
|
|
}
|
|
|
|
|
|
}
|
|
|
|
static void yaffs_VerifyObjects(yaffs_Device *dev)
|
|
{
|
|
yaffs_Object *obj;
|
|
int i;
|
|
struct list_head *lh;
|
|
|
|
if(yaffs_SkipVerification(dev))
|
|
return;
|
|
|
|
/* Iterate through the objects in each hash entry */
|
|
|
|
for(i = 0; i < YAFFS_NOBJECT_BUCKETS; i++){
|
|
list_for_each(lh, &dev->objectBucket[i].list) {
|
|
if (lh) {
|
|
obj = list_entry(lh, yaffs_Object, hashLink);
|
|
yaffs_VerifyObject(obj);
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
* Simple hash function. Needs to have a reasonable spread
|
|
*/
|
|
|
|
static Y_INLINE int yaffs_HashFunction(int n)
|
|
{
|
|
n = abs(n);
|
|
return (n % YAFFS_NOBJECT_BUCKETS);
|
|
}
|
|
|
|
/*
|
|
* Access functions to useful fake objects
|
|
*/
|
|
|
|
yaffs_Object *yaffs_Root(yaffs_Device * dev)
|
|
{
|
|
return dev->rootDir;
|
|
}
|
|
|
|
yaffs_Object *yaffs_LostNFound(yaffs_Device * dev)
|
|
{
|
|
return dev->lostNFoundDir;
|
|
}
|
|
|
|
|
|
/*
|
|
* Erased NAND checking functions
|
|
*/
|
|
|
|
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 && attempts < yaffs_wr_attempts);
|
|
|
|
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);
|
|
|
|
yaffs_MarkBlockBad(dev, blockInNAND);
|
|
|
|
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;
|
|
|
|
YUCHAR *bname = (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
|
|
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;
|
|
|
|
/* 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--;
|
|
}
|
|
|
|
return tn;
|
|
}
|
|
|
|
static yaffs_Tnode *yaffs_GetTnode(yaffs_Device * dev)
|
|
{
|
|
yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
|
|
|
|
if(tn)
|
|
memset(tn, 0, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
|
|
|
|
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++;
|
|
}
|
|
}
|
|
|
|
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) {
|
|
/* Not tall enough, so we can't find it, return NULL. */
|
|
return NULL;
|
|
}
|
|
|
|
/* 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 list_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;
|
|
|
|
/* 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--;
|
|
|
|
/* Now sweeten it up... */
|
|
|
|
memset(tn, 0, sizeof(yaffs_Object));
|
|
tn->myDev = dev;
|
|
tn->chunkId = -1;
|
|
tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
|
|
INIT_LIST_HEAD(&(tn->hardLinks));
|
|
INIT_LIST_HEAD(&(tn->hashLink));
|
|
INIT_LIST_HEAD(&tn->siblings);
|
|
|
|
/* 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);
|
|
}
|
|
}
|
|
|
|
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 has 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->chunkId = 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 (!list_empty(&tn->hashLink)) {
|
|
list_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__
|
|
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);
|
|
|
|
/* Link into the free list. */
|
|
tn->siblings.next = (struct list_head *)(dev->freeObjects);
|
|
dev->freeObjects = tn;
|
|
dev->nFreeObjects++;
|
|
}
|
|
|
|
#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++) {
|
|
INIT_LIST_HEAD(&dev->objectBucket[i].list);
|
|
dev->objectBucket[i].count = 0;
|
|
}
|
|
|
|
}
|
|
|
|
static int yaffs_FindNiceObjectBucket(yaffs_Device * dev)
|
|
{
|
|
static int x = 0;
|
|
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 list_head *i;
|
|
|
|
__u32 n = (__u32) bucket;
|
|
|
|
/* yaffs_CheckObjectHashSanity(); */
|
|
|
|
while (!found) {
|
|
found = 1;
|
|
n += YAFFS_NOBJECT_BUCKETS;
|
|
if (1 || dev->objectBucket[bucket].count > 0) {
|
|
list_for_each(i, &dev->objectBucket[bucket].list) {
|
|
/* If there is already one in the list */
|
|
if (i
|
|
&& list_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;
|
|
|
|
list_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 list_head *i;
|
|
yaffs_Object *in;
|
|
|
|
list_for_each(i, &dev->objectBucket[bucket].list) {
|
|
/* Look if it is in the list */
|
|
if (i) {
|
|
in = list_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;
|
|
|
|
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:
|
|
INIT_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;
|
|
|
|
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(type == YAFFS_OBJECT_TYPE_SYMLINK){
|
|
str = yaffs_CloneString(aliasString);
|
|
if(!str){
|
|
yaffs_FreeObject(in);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
if (in) {
|
|
in->chunkId = -1;
|
|
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;
|
|
list_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_DestroyObject(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
|
|
("tragendy: 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;
|
|
yaffs_Object *existingTarget;
|
|
int force = 0;
|
|
|
|
#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
|
|
|
|
obj = yaffs_FindObjectByName(oldDir, oldName);
|
|
/* Check new name to long. */
|
|
if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK &&
|
|
yaffs_strlen(newName) > YAFFS_MAX_ALIAS_LENGTH)
|
|
/* ENAMETOOLONG */
|
|
return YAFFS_FAIL;
|
|
else if (obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK &&
|
|
yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
|
|
/* ENAMETOOLONG */
|
|
return YAFFS_FAIL;
|
|
|
|
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 &&
|
|
!list_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 0
|
|
if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) {
|
|
dirtiest = b;
|
|
pagesInUse = 0;
|
|
}
|
|
else
|
|
#endif
|
|
|
|
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 eraased 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 eraased blocks, but there should have been %d"
|
|
TENDSTR), dev->nErasedBlocks));
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
// 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;
|
|
|
|
checkpointBlocks = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint;
|
|
if(checkpointBlocks < 0)
|
|
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 oldChunk;
|
|
int newChunk;
|
|
int chunkInBlock;
|
|
int markNAND;
|
|
int retVal = YAFFS_OK;
|
|
int cleanups = 0;
|
|
int i;
|
|
int isCheckpointBlock;
|
|
int matchingChunk;
|
|
|
|
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, " TENDSTR), block,
|
|
bi->pagesInUse, bi->hasShrinkHeader));
|
|
|
|
/*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);
|
|
|
|
for (chunkInBlock = 0, oldChunk = block * dev->nChunksPerBlock;
|
|
chunkInBlock < dev->nChunksPerBlock
|
|
&& yaffs_StillSomeChunkBits(dev, block);
|
|
chunkInBlock++, oldChunk++) {
|
|
if (yaffs_CheckChunkBit(dev, block, chunkInBlock)) {
|
|
|
|
/* This page is in use and might need to be copied off */
|
|
|
|
markNAND = 1;
|
|
|
|
yaffs_InitialiseTags(&tags);
|
|
|
|
yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
|
|
buffer, &tags);
|
|
|
|
object =
|
|
yaffs_FindObjectByNumber(dev,
|
|
tags.objectId);
|
|
|
|
T(YAFFS_TRACE_GC_DETAIL,
|
|
(TSTR
|
|
("Collecting page %d, %d %d %d " TENDSTR),
|
|
chunkInBlock, tags.objectId, tags.chunkId,
|
|
tags.byteCount));
|
|
|
|
if(object && !yaffs_SkipVerification(dev)){
|
|
if(tags.chunkId == 0)
|
|
matchingChunk = object->chunkId;
|
|
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
|
|
&& tags.chunkId != 0) {
|
|
/* Data chunk in a 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->chunkId = 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.
|
|
* Also, clear out any shadowing stuff
|
|
*/
|
|
|
|
yaffs_ObjectHeader *oh;
|
|
oh = (yaffs_ObjectHeader *)buffer;
|
|
oh->isShrink = 0;
|
|
oh->shadowsObject = -1;
|
|
tags.extraShadows = 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->chunkId = newChunk;
|
|
object->serial = tags.serialNumber;
|
|
} else {
|
|
/* It's a data chunk */
|
|
yaffs_PutChunkIntoFile
|
|
(object,
|
|
tags.chunkId,
|
|
newChunk, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
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 (chunksBefore >= (chunksAfter = yaffs_GetErasedChunks(dev))) {
|
|
T(YAFFS_TRACE_GC,
|
|
(TSTR
|
|
("gc did not increase free chunks before %d after %d"
|
|
TENDSTR), chunksBefore, chunksAfter));
|
|
}
|
|
|
|
dev->isDoingGC = 0;
|
|
|
|
return YAFFS_OK;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
int checkpointBlockAdjust;
|
|
|
|
if (dev->isDoingGC) {
|
|
/* Bail out so we don't get recursive gc */
|
|
return YAFFS_OK;
|
|
}
|
|
|
|
/* This loop should pass the first time.
|
|
* We'll only see looping here if the erase of the collected block fails.
|
|
*/
|
|
|
|
do {
|
|
maxTries++;
|
|
|
|
checkpointBlockAdjust = (dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint);
|
|
if(checkpointBlockAdjust < 0)
|
|
checkpointBlockAdjust = 0;
|
|
|
|
if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
|
|
/* We need a block soon...*/
|
|
aggressive = 1;
|
|
} else {
|
|
/* We're in no hurry */
|
|
aggressive = 0;
|
|
}
|
|
|
|
block = yaffs_FindBlockForGarbageCollection(dev, aggressive);
|
|
|
|
if (block > 0) {
|
|
dev->garbageCollections++;
|
|
if (!aggressive) {
|
|
dev->passiveGarbageCollections++;
|
|
}
|
|
|
|
T(YAFFS_TRACE_GC,
|
|
(TSTR
|
|
("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
|
|
dev->nErasedBlocks, aggressive));
|
|
|
|
gcOk = yaffs_GarbageCollectBlock(dev, block);
|
|
}
|
|
|
|
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));
|
|
}
|
|
} while ((dev->nErasedBlocks < dev->nReservedBlocks) && (block > 0)
|
|
&& (maxTries < 2));
|
|
|
|
return aggressive ? gcOk : YAFFS_OK;
|
|
}
|
|
|
|
/*------------------------- TAGS --------------------------------*/
|
|
|
|
static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId,
|
|
int chunkInObject)
|
|
{
|
|
return (tags->chunkId == chunkInObject &&
|
|
tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
|
|
|
|
}
|
|
|
|
|
|
/*-------------------- Data file manipulation -----------------*/
|
|
|
|
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;
|
|
|
|
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);
|
|
|
|
if (tn) {
|
|
theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
|
|
|
|
retVal =
|
|
yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
|
|
chunkInInode);
|
|
}
|
|
return retVal;
|
|
}
|
|
|
|
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;
|
|
|
|
yaffs_Device *dev = in->myDev;
|
|
int retVal = -1;
|
|
|
|
if (!tags) {
|
|
/* Passed a NULL, so use our own tags space */
|
|
tags = &localTags;
|
|
}
|
|
|
|
tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
|
|
|
|
if (tn) {
|
|
|
|
theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
|
|
|
|
retVal =
|
|
yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
|
|
chunkInInode);
|
|
|
|
/* Delete the entry in the filestructure (if found) */
|
|
if (retVal != -1) {
|
|
yaffs_PutLevel0Tnode(dev,tn,chunkInInode,0);
|
|
}
|
|
} else {
|
|
/*T(("No level 0 found for %d\n", chunkInInode)); */
|
|
}
|
|
|
|
if (retVal == -1) {
|
|
/* T(("Could not find %d to delete\n",chunkInInode)); */
|
|
}
|
|
return retVal;
|
|
}
|
|
|
|
#ifdef YAFFS_PARANOID
|
|
|
|
static int yaffs_CheckFileSanity(yaffs_Object * in)
|
|
{
|
|
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) {
|
|
/* T(("Object not a file\n")); */
|
|
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->nChunksPerBlock,
|
|
theChunk % dev->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;
|
|
}
|
|
|
|
#endif
|
|
|
|
static 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
|
|
*/
|
|
|
|
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_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
|
|
return YAFFS_OK;
|
|
}
|
|
|
|
tn = yaffs_AddOrFindLevel0Tnode(dev,
|
|
&in->variant.fileVariant,
|
|
chunkInInode,
|
|
NULL);
|
|
if (!tn) {
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
existingChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
|
|
|
|
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.
|
|
*/
|
|
|
|
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);
|
|
|
|
/* Do a proper find */
|
|
existingChunk =
|
|
yaffs_FindChunkInFile(in, chunkInInode,
|
|
&existingTags);
|
|
}
|
|
|
|
if (existingChunk <= 0) {
|
|
/*Hoosterman - how did this happen? */
|
|
|
|
T(YAFFS_TRACE_ERROR,
|
|
(TSTR
|
|
("yaffs tragedy: existing chunk < 0 in scan"
|
|
TENDSTR)));
|
|
|
|
}
|
|
|
|
/* NB The deleted flags should be false, otherwise the chunks will
|
|
* not be loaded during a scan
|
|
*/
|
|
|
|
newSerial = newTags.serialNumber;
|
|
existingSerial = existingTags.serialNumber;
|
|
|
|
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 (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;
|
|
}
|
|
|
|
}
|
|
|
|
void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn)
|
|
{
|
|
int block;
|
|
int page;
|
|
yaffs_ExtendedTags tags;
|
|
yaffs_BlockInfo *bi;
|
|
|
|
if (chunkId <= 0)
|
|
return;
|
|
|
|
|
|
dev->nDeletions++;
|
|
block = chunkId / dev->nChunksPerBlock;
|
|
page = chunkId % dev->nChunksPerBlock;
|
|
|
|
|
|
if(!yaffs_CheckChunkBit(dev,block,page))
|
|
T(YAFFS_TRACE_VERIFY,
|
|
(TSTR("Deleting invalid chunk %d"TENDSTR),
|
|
chunkId));
|
|
|
|
bi = yaffs_GetBlockInfo(dev, block);
|
|
|
|
T(YAFFS_TRACE_DELETION,
|
|
(TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
|
|
|
|
if (markNAND &&
|
|
bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
|
|
|
|
yaffs_InitialiseTags(&tags);
|
|
|
|
tags.chunkDeleted = 1;
|
|
|
|
yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
|
|
yaffs_HandleUpdateChunk(dev, chunkId, &tags);
|
|
} else {
|
|
dev->nUnmarkedDeletions++;
|
|
}
|
|
|
|
/* 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++;
|
|
|
|
yaffs_ClearChunkBit(dev, block, page);
|
|
|
|
bi->pagesInUse--;
|
|
|
|
if (bi->pagesInUse == 0 &&
|
|
!bi->hasShrinkHeader &&
|
|
bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
|
|
bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
|
|
yaffs_BlockBecameDirty(dev, block);
|
|
}
|
|
|
|
} else {
|
|
/* T(("Bad news deleting chunk %d\n",chunkId)); */
|
|
}
|
|
|
|
}
|
|
|
|
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.
|
|
*/
|
|
|
|
int prevChunkId;
|
|
yaffs_ExtendedTags prevTags;
|
|
|
|
int newChunkId;
|
|
yaffs_ExtendedTags newTags;
|
|
|
|
yaffs_Device *dev = in->myDev;
|
|
|
|
yaffs_CheckGarbageCollection(dev);
|
|
|
|
/* Get the previous chunk at this location in the file if it exists */
|
|
prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
|
|
|
|
/* 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;
|
|
|
|
newChunkId =
|
|
yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
|
|
useReserve);
|
|
|
|
if (newChunkId >= 0) {
|
|
yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
|
|
|
|
if (prevChunkId >= 0) {
|
|
yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
|
|
|
|
}
|
|
|
|
yaffs_CheckFileSanity(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_BlockInfo *bi;
|
|
|
|
yaffs_Device *dev = in->myDev;
|
|
|
|
int prevChunkId;
|
|
int retVal = 0;
|
|
int result = 0;
|
|
|
|
int newChunkId;
|
|
yaffs_ExtendedTags newTags;
|
|
yaffs_ExtendedTags oldTags;
|
|
|
|
__u8 *buffer = NULL;
|
|
YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
|
|
|
|
yaffs_ObjectHeader *oh = NULL;
|
|
|
|
yaffs_strcpy(oldName,"silly old name");
|
|
|
|
if (!in->fake || force) {
|
|
|
|
yaffs_CheckGarbageCollection(dev);
|
|
yaffs_CheckObjectDetailsLoaded(in);
|
|
|
|
buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
|
|
oh = (yaffs_ObjectHeader *) buffer;
|
|
|
|
prevChunkId = in->chunkId;
|
|
|
|
if (prevChunkId >= 0) {
|
|
result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
|
|
buffer, &oldTags);
|
|
|
|
yaffs_VerifyObjectHeader(in,oh,&oldTags,0);
|
|
|
|
memcpy(oldName, oh->name, sizeof(oh->name));
|
|
}
|
|
|
|
memset(buffer, 0xFF, dev->nDataBytesPerChunk);
|
|
|
|
oh->type = in->variantType;
|
|
oh->yst_mode = in->yst_mode;
|
|
oh->shadowsObject = shadows;
|
|
|
|
#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));
|
|
}
|
|
|
|
oh->isShrink = isShrink;
|
|
|
|
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:
|
|
yaffs_strncpy(oh->alias,
|
|
in->variant.symLinkVariant.alias,
|
|
YAFFS_MAX_ALIAS_LENGTH);
|
|
oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
|
|
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);
|
|
|
|
/* Create new chunk in NAND */
|
|
newChunkId =
|
|
yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
|
|
(prevChunkId >= 0) ? 1 : 0);
|
|
|
|
if (newChunkId >= 0) {
|
|
|
|
in->chunkId = newChunkId;
|
|
|
|
if (prevChunkId >= 0) {
|
|
yaffs_DeleteChunk(dev, prevChunkId, 1,
|
|
__LINE__);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
}
|
|
|
|
retVal = newChunkId;
|
|
|
|
}
|
|
|
|
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.
|
|
*/
|
|
|
|
static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
|
|
{
|
|
yaffs_Device *dev = obj->myDev;
|
|
int i;
|
|
yaffs_ChunkCache *cache;
|
|
int nCaches = obj->myDev->nShortOpCaches;
|
|
|
|
for(i = 0; i < nCaches; i++){
|
|
cache = &dev->srCache[i];
|
|
if (cache->object == obj &&
|
|
cache->dirty)
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
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;
|
|
}
|
|
|
|
} while (cache && chunkWritten > 0);
|
|
|
|
if (cache) {
|
|
/* Hoosterman, disk full while writing cache out. */
|
|
T(YAFFS_TRACE_ERROR,
|
|
(TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
|
|
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/*yaffs_FlushEntireDeviceCache(dev)
|
|
*
|
|
*
|
|
*/
|
|
|
|
void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
|
|
{
|
|
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);
|
|
|
|
} while(obj);
|
|
|
|
}
|
|
|
|
|
|
/* 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)
|
|
{
|
|
int i;
|
|
int usage;
|
|
int theOne;
|
|
|
|
if (dev->nShortOpCaches > 0) {
|
|
for (i = 0; i < dev->nShortOpCaches; i++) {
|
|
if (!dev->srCache[i].object)
|
|
return &dev->srCache[i];
|
|
}
|
|
|
|
return NULL;
|
|
|
|
theOne = -1;
|
|
usage = 0; /* just to stop the compiler grizzling */
|
|
|
|
for (i = 0; i < dev->nShortOpCaches; i++) {
|
|
if (!dev->srCache[i].dirty &&
|
|
((dev->srCache[i].lastUse < usage && theOne >= 0) ||
|
|
theOne < 0)) {
|
|
usage = dev->srCache[i].lastUse;
|
|
theOne = i;
|
|
}
|
|
}
|
|
|
|
|
|
return theOne >= 0 ? &dev->srCache[theOne] : NULL;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
|
|
}
|
|
|
|
static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device * dev)
|
|
{
|
|
yaffs_ChunkCache *cache;
|
|
yaffs_Object *theObj;
|
|
int usage;
|
|
int i;
|
|
int pushout;
|
|
|
|
if (dev->nShortOpCaches > 0) {
|
|
/* Try find a non-dirty one... */
|
|
|
|
cache = yaffs_GrabChunkCacheWorker(dev);
|
|
|
|
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 */
|
|
|
|
theObj = NULL;
|
|
usage = -1;
|
|
cache = NULL;
|
|
pushout = -1;
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
if (!cache || cache->dirty) {
|
|
/* Flush and try again */
|
|
yaffs_FlushFilesChunkCache(theObj);
|
|
cache = yaffs_GrabChunkCacheWorker(dev);
|
|
}
|
|
|
|
}
|
|
return cache;
|
|
} else
|
|
return NULL;
|
|
|
|
}
|
|
|
|
/* 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++;
|
|
|
|
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->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;
|
|
}
|
|
|
|
dev->srLastUse++;
|
|
|
|
cache->lastUse = dev->srLastUse;
|
|
|
|
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->nShortOpCaches > 0) {
|
|
yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
|
|
|
|
if (cache) {
|
|
cache->object = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
|
|
if (dev->nShortOpCaches > 0) {
|
|
/* Invalidate it. */
|
|
for (i = 0; i < dev->nShortOpCaches; i++) {
|
|
if (dev->srCache[i].object == in) {
|
|
dev->srCache[i].object = NULL;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*--------------------- Checkpointing --------------------*/
|
|
|
|
|
|
static int yaffs_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 (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp))?
|
|
1 : 0;
|
|
}
|
|
|
|
static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
|
|
{
|
|
yaffs_CheckpointValidity cp;
|
|
int ok;
|
|
|
|
ok = (yaffs_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 yaffs_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;
|
|
cp->oldestDirtySequence = dev->oldestDirtySequence;
|
|
|
|
}
|
|
|
|
static void yaffs_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;
|
|
dev->oldestDirtySequence = cp->oldestDirtySequence;
|
|
}
|
|
|
|
|
|
static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
|
|
{
|
|
yaffs_CheckpointDevice cp;
|
|
__u32 nBytes;
|
|
__u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
|
|
|
|
int ok;
|
|
|
|
/* Write device runtime values*/
|
|
yaffs_DeviceToCheckpointDevice(&cp,dev);
|
|
cp.structType = sizeof(cp);
|
|
|
|
ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp));
|
|
|
|
/* Write block info */
|
|
if(ok) {
|
|
nBytes = nBlocks * sizeof(yaffs_BlockInfo);
|
|
ok = (yaffs_CheckpointWrite(dev,dev->blockInfo,nBytes) == nBytes);
|
|
}
|
|
|
|
/* Write chunk bits */
|
|
if(ok) {
|
|
nBytes = nBlocks * dev->chunkBitmapStride;
|
|
ok = (yaffs_CheckpointWrite(dev,dev->chunkBits,nBytes) == nBytes);
|
|
}
|
|
return ok ? 1 : 0;
|
|
|
|
}
|
|
|
|
static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
|
|
{
|
|
yaffs_CheckpointDevice cp;
|
|
__u32 nBytes;
|
|
__u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
|
|
|
|
int ok;
|
|
|
|
ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp));
|
|
if(!ok)
|
|
return 0;
|
|
|
|
if(cp.structType != sizeof(cp))
|
|
return 0;
|
|
|
|
|
|
yaffs_CheckpointDeviceToDevice(dev,&cp);
|
|
|
|
nBytes = nBlocks * sizeof(yaffs_BlockInfo);
|
|
|
|
ok = (yaffs_CheckpointRead(dev,dev->blockInfo,nBytes) == nBytes);
|
|
|
|
if(!ok)
|
|
return 0;
|
|
nBytes = nBlocks * dev->chunkBitmapStride;
|
|
|
|
ok = (yaffs_CheckpointRead(dev,dev->chunkBits,nBytes) == nBytes);
|
|
|
|
return ok ? 1 : 0;
|
|
}
|
|
|
|
static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
|
|
yaffs_Object *obj)
|
|
{
|
|
|
|
cp->objectId = obj->objectId;
|
|
cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
|
|
cp->chunkId = obj->chunkId;
|
|
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 void yaffs_CheckpointObjectToObject( yaffs_Object *obj,yaffs_CheckpointObject *cp)
|
|
{
|
|
|
|
yaffs_Object *parent;
|
|
|
|
obj->objectId = cp->objectId;
|
|
|
|
if(cp->parentId)
|
|
parent = yaffs_FindOrCreateObjectByNumber(
|
|
obj->myDev,
|
|
cp->parentId,
|
|
YAFFS_OBJECT_TYPE_DIRECTORY);
|
|
else
|
|
parent = NULL;
|
|
|
|
if(parent)
|
|
yaffs_AddObjectToDirectory(parent, obj);
|
|
|
|
obj->chunkId = cp->chunkId;
|
|
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->objectId >= YAFFS_NOBJECT_BUCKETS)
|
|
obj->lazyLoaded = 1;
|
|
}
|
|
|
|
|
|
|
|
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 nTnodeBytes = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
|
|
|
|
if (tn) {
|
|
if (level > 0) {
|
|
|
|
for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){
|
|
if (tn->internal[i]) {
|
|
ok = yaffs_CheckpointTnodeWorker(in,
|
|
tn->internal[i],
|
|
level - 1,
|
|
(chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
|
|
}
|
|
}
|
|
} else if (level == 0) {
|
|
__u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
|
|
/* printf("write tnode at %d\n",baseOffset); */
|
|
ok = (yaffs_CheckpointWrite(dev,&baseOffset,sizeof(baseOffset)) == sizeof(baseOffset));
|
|
if(ok)
|
|
ok = (yaffs_CheckpointWrite(dev,tn,nTnodeBytes) == nTnodeBytes);
|
|
}
|
|
}
|
|
|
|
return ok;
|
|
|
|
}
|
|
|
|
static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
|
|
{
|
|
__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));
|
|
}
|
|
|
|
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;
|
|
|
|
ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk));
|
|
|
|
while(ok && (~baseChunk)){
|
|
nread++;
|
|
/* Read level 0 tnode */
|
|
|
|
|
|
/* printf("read tnode at %d\n",baseChunk); */
|
|
tn = yaffs_GetTnodeRaw(dev);
|
|
if(tn)
|
|
ok = (yaffs_CheckpointRead(dev,tn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8) ==
|
|
(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
|
|
else
|
|
ok = 0;
|
|
|
|
if(tn && ok){
|
|
ok = yaffs_AddOrFindLevel0Tnode(dev,
|
|
fileStructPtr,
|
|
baseChunk,
|
|
tn) ? 1 : 0;
|
|
|
|
}
|
|
|
|
if(ok)
|
|
ok = (yaffs_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 yaffs_WriteCheckpointObjects(yaffs_Device *dev)
|
|
{
|
|
yaffs_Object *obj;
|
|
yaffs_CheckpointObject cp;
|
|
int i;
|
|
int ok = 1;
|
|
struct list_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++){
|
|
list_for_each(lh, &dev->objectBucket[i].list) {
|
|
if (lh) {
|
|
obj = list_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.chunkId,(unsigned) obj));
|
|
|
|
ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp));
|
|
|
|
if(ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE){
|
|
ok = yaffs_WriteCheckpointTnodes(obj);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Dump end of list */
|
|
memset(&cp,0xFF,sizeof(yaffs_CheckpointObject));
|
|
cp.structType = sizeof(cp);
|
|
|
|
if(ok)
|
|
ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp));
|
|
|
|
return ok ? 1 : 0;
|
|
}
|
|
|
|
static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
|
|
{
|
|
yaffs_Object *obj;
|
|
yaffs_CheckpointObject cp;
|
|
int ok = 1;
|
|
int done = 0;
|
|
yaffs_Object *hardList = NULL;
|
|
|
|
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.chunkId));
|
|
|
|
if(ok && cp.objectId == ~0)
|
|
done = 1;
|
|
else if(ok){
|
|
obj = yaffs_FindOrCreateObjectByNumber(dev,cp.objectId, cp.variantType);
|
|
if(obj) {
|
|
yaffs_CheckpointObjectToObject(obj,&cp);
|
|
if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
|
|
ok = yaffs_ReadCheckpointTnodes(obj);
|
|
} else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
|
|
obj->hardLinks.next =
|
|
(struct list_head *)
|
|
hardList;
|
|
hardList = obj;
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
if(ok)
|
|
yaffs_HardlinkFixup(dev,hardList);
|
|
|
|
return ok ? 1 : 0;
|
|
}
|
|
|
|
static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
|
|
{
|
|
__u32 checkpointSum;
|
|
int ok;
|
|
|
|
yaffs_GetCheckpointSum(dev,&checkpointSum);
|
|
|
|
ok = (yaffs_CheckpointWrite(dev,&checkpointSum,sizeof(checkpointSum)) == sizeof(checkpointSum));
|
|
|
|
if(!ok)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
|
|
{
|
|
__u32 checkpointSum0;
|
|
__u32 checkpointSum1;
|
|
int ok;
|
|
|
|
yaffs_GetCheckpointSum(dev,&checkpointSum0);
|
|
|
|
ok = (yaffs_CheckpointRead(dev,&checkpointSum1,sizeof(checkpointSum1)) == sizeof(checkpointSum1));
|
|
|
|
if(!ok)
|
|
return 0;
|
|
|
|
if(checkpointSum0 != checkpointSum1)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int yaffs_WriteCheckpointData(yaffs_Device *dev)
|
|
{
|
|
|
|
int ok = 1;
|
|
|
|
if(dev->skipCheckpointWrite || !dev->isYaffs2){
|
|
T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint write" TENDSTR)));
|
|
ok = 0;
|
|
}
|
|
|
|
if(ok)
|
|
ok = yaffs_CheckpointOpen(dev,1);
|
|
|
|
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(ok){
|
|
ok = yaffs_WriteCheckpointSum(dev);
|
|
}
|
|
|
|
|
|
if(!yaffs_CheckpointClose(dev))
|
|
ok = 0;
|
|
|
|
if(ok)
|
|
dev->isCheckpointed = 1;
|
|
else
|
|
dev->isCheckpointed = 0;
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
|
|
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) {
|
|
yaffs_InvalidateCheckpoint(dev);
|
|
yaffs_WriteCheckpointData(dev);
|
|
}
|
|
|
|
T(YAFFS_TRACE_ALWAYS,(TSTR("save exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
|
|
|
|
return dev->isCheckpointed;
|
|
}
|
|
|
|
int yaffs_CheckpointRestore(yaffs_Device *dev)
|
|
{
|
|
int retval;
|
|
T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
|
|
|
|
retval = yaffs_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;
|
|
}
|
|
|
|
/*--------------------- 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.
|
|
*/
|
|
|
|
int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, loff_t offset,
|
|
int nBytes)
|
|
{
|
|
|
|
int chunk;
|
|
int start;
|
|
int nToCopy;
|
|
int n = nBytes;
|
|
int nDone = 0;
|
|
yaffs_ChunkCache *cache;
|
|
|
|
yaffs_Device *dev;
|
|
|
|
dev = in->myDev;
|
|
|
|
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);
|
|
|
|
/* If the chunk is already in the cache or it is less than a whole chunk
|
|
* then use the cache (if there is caching)
|
|
* else bypass the cache.
|
|
*/
|
|
if (cache || nToCopy != dev->nDataBytesPerChunk) {
|
|
if (dev->nShortOpCaches > 0) {
|
|
|
|
/* If we can't find the data in the cache, then load it up. */
|
|
|
|
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;
|
|
}
|
|
|
|
yaffs_UseChunkCache(dev, cache, 0);
|
|
|
|
cache->locked = 1;
|
|
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
yfsd_UnlockYAFFS(TRUE);
|
|
#endif
|
|
memcpy(buffer, &cache->data[start], nToCopy);
|
|
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
yfsd_LockYAFFS(TRUE);
|
|
#endif
|
|
cache->locked = 0;
|
|
} else {
|
|
/* Read into the local buffer then copy..*/
|
|
|
|
__u8 *localBuffer =
|
|
yaffs_GetTempBuffer(dev, __LINE__);
|
|
yaffs_ReadChunkDataFromObject(in, chunk,
|
|
localBuffer);
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
yfsd_UnlockYAFFS(TRUE);
|
|
#endif
|
|
memcpy(buffer, &localBuffer[start], nToCopy);
|
|
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
yfsd_LockYAFFS(TRUE);
|
|
#endif
|
|
yaffs_ReleaseTempBuffer(dev, localBuffer,
|
|
__LINE__);
|
|
}
|
|
|
|
} else {
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
__u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
|
|
|
|
/* Under WinCE can't do direct transfer. Need to use a local buffer.
|
|
* This is because we otherwise screw up WinCE's memory mapper
|
|
*/
|
|
yaffs_ReadChunkDataFromObject(in, chunk, localBuffer);
|
|
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
yfsd_UnlockYAFFS(TRUE);
|
|
#endif
|
|
memcpy(buffer, localBuffer, dev->nDataBytesPerChunk);
|
|
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
yfsd_LockYAFFS(TRUE);
|
|
yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
|
|
#endif
|
|
|
|
#else
|
|
/* A full chunk. Read directly into the supplied buffer. */
|
|
yaffs_ReadChunkDataFromObject(in, chunk, buffer);
|
|
#endif
|
|
}
|
|
|
|
n -= nToCopy;
|
|
offset += nToCopy;
|
|
buffer += nToCopy;
|
|
nDone += nToCopy;
|
|
|
|
}
|
|
|
|
return nDone;
|
|
}
|
|
|
|
int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset,
|
|
int nBytes, int writeThrough)
|
|
{
|
|
|
|
int chunk;
|
|
int start;
|
|
int nToCopy;
|
|
int n = nBytes;
|
|
int nDone = 0;
|
|
int nToWriteBack;
|
|
int startOfWrite = offset;
|
|
int chunkWritten = 0;
|
|
int nBytesRead;
|
|
|
|
yaffs_Device *dev;
|
|
|
|
dev = in->myDev;
|
|
|
|
while (n > 0 && chunkWritten >= 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;
|
|
|
|
/* 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.
|
|
*/
|
|
|
|
nBytesRead =
|
|
in->variant.fileVariant.fileSize -
|
|
((chunk - 1) * dev->nDataBytesPerChunk);
|
|
|
|
if (nBytesRead > dev->nDataBytesPerChunk) {
|
|
nBytesRead = dev->nDataBytesPerChunk;
|
|
}
|
|
|
|
nToWriteBack =
|
|
(nBytesRead >
|
|
(start + n)) ? nBytesRead : (start + n);
|
|
|
|
} else {
|
|
nToCopy = dev->nDataBytesPerChunk - start;
|
|
nToWriteBack = dev->nDataBytesPerChunk;
|
|
}
|
|
|
|
if (nToCopy != dev->nDataBytesPerChunk) {
|
|
/* An incomplete start or end chunk (or maybe both start and end chunk) */
|
|
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);
|
|
|
|
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 (cache) {
|
|
yaffs_UseChunkCache(dev, cache, 1);
|
|
cache->locked = 1;
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
yfsd_UnlockYAFFS(TRUE);
|
|
#endif
|
|
|
|
memcpy(&cache->data[start], buffer,
|
|
nToCopy);
|
|
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
yfsd_LockYAFFS(TRUE);
|
|
#endif
|
|
cache->locked = 0;
|
|
cache->nBytes = nToWriteBack;
|
|
|
|
if (writeThrough) {
|
|
chunkWritten =
|
|
yaffs_WriteChunkDataToObject
|
|
(cache->object,
|
|
cache->chunkId,
|
|
cache->data, cache->nBytes,
|
|
1);
|
|
cache->dirty = 0;
|
|
}
|
|
|
|
} 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__);
|
|
|
|
yaffs_ReadChunkDataFromObject(in, chunk,
|
|
localBuffer);
|
|
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
yfsd_UnlockYAFFS(TRUE);
|
|
#endif
|
|
|
|
memcpy(&localBuffer[start], buffer, nToCopy);
|
|
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
yfsd_LockYAFFS(TRUE);
|
|
#endif
|
|
chunkWritten =
|
|
yaffs_WriteChunkDataToObject(in, chunk,
|
|
localBuffer,
|
|
nToWriteBack,
|
|
0);
|
|
|
|
yaffs_ReleaseTempBuffer(dev, localBuffer,
|
|
__LINE__);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
/* Under WinCE can't do direct transfer. Need to use a local buffer.
|
|
* This is because we otherwise screw up WinCE's memory mapper
|
|
*/
|
|
__u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
yfsd_UnlockYAFFS(TRUE);
|
|
#endif
|
|
memcpy(localBuffer, buffer, dev->nDataBytesPerChunk);
|
|
#ifdef CONFIG_YAFFS_WINCE
|
|
yfsd_LockYAFFS(TRUE);
|
|
#endif
|
|
chunkWritten =
|
|
yaffs_WriteChunkDataToObject(in, chunk, localBuffer,
|
|
dev->nDataBytesPerChunk,
|
|
0);
|
|
yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
|
|
#else
|
|
/* A full chunk. Write directly from the supplied buffer. */
|
|
chunkWritten =
|
|
yaffs_WriteChunkDataToObject(in, chunk, buffer,
|
|
dev->nDataBytesPerChunk,
|
|
0);
|
|
#endif
|
|
/* Since we've overwritten the cached data, we better invalidate it. */
|
|
yaffs_InvalidateChunkCache(in, chunk);
|
|
}
|
|
|
|
if (chunkWritten >= 0) {
|
|
n -= nToCopy;
|
|
offset += nToCopy;
|
|
buffer += nToCopy;
|
|
nDone += nToCopy;
|
|
}
|
|
|
|
}
|
|
|
|
/* Update file object */
|
|
|
|
if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize) {
|
|
in->variant.fileVariant.fileSize = (startOfWrite + nDone);
|
|
}
|
|
|
|
in->dirty = 1;
|
|
|
|
return nDone;
|
|
}
|
|
|
|
|
|
/* ---------------------- File resizing stuff ------------------ */
|
|
|
|
static void yaffs_PruneResizedChunks(yaffs_Object * in, int newSize)
|
|
{
|
|
|
|
yaffs_Device *dev = in->myDev;
|
|
int oldFileSize = in->variant.fileVariant.fileSize;
|
|
|
|
int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
|
|
|
|
int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
|
|
dev->nDataBytesPerChunk;
|
|
int i;
|
|
int chunkId;
|
|
|
|
/* 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__);
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
int yaffs_ResizeFile(yaffs_Object * in, loff_t newSize)
|
|
{
|
|
|
|
int oldFileSize = in->variant.fileVariant.fileSize;
|
|
int newSizeOfPartialChunk;
|
|
int newFullChunks;
|
|
|
|
yaffs_Device *dev = in->myDev;
|
|
|
|
yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
|
|
|
|
yaffs_FlushFilesChunkCache(in);
|
|
yaffs_InvalidateWholeChunkCache(in);
|
|
|
|
yaffs_CheckGarbageCollection(dev);
|
|
|
|
if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
|
|
return yaffs_GetFileSize(in);
|
|
}
|
|
|
|
if (newSize == oldFileSize) {
|
|
return oldFileSize;
|
|
}
|
|
|
|
if (newSize < oldFileSize) {
|
|
|
|
yaffs_PruneResizedChunks(in, newSize);
|
|
|
|
if (newSizeOfPartialChunk != 0) {
|
|
int lastChunk = 1 + newFullChunks;
|
|
|
|
__u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
|
|
|
|
/* Got to read and rewrite the last chunk with its new size and zero pad */
|
|
yaffs_ReadChunkDataFromObject(in, lastChunk,
|
|
localBuffer);
|
|
|
|
memset(localBuffer + newSizeOfPartialChunk, 0,
|
|
dev->nDataBytesPerChunk - newSizeOfPartialChunk);
|
|
|
|
yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
|
|
newSizeOfPartialChunk, 1);
|
|
|
|
yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
|
|
}
|
|
|
|
in->variant.fileVariant.fileSize = newSize;
|
|
|
|
yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
|
|
} else {
|
|
/* newsSize > oldFileSize */
|
|
in->variant.fileVariant.fileSize = newSize;
|
|
}
|
|
|
|
|
|
|
|
/* 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->objectId != YAFFS_OBJECTID_UNLINKED &&
|
|
in->parent->objectId != YAFFS_OBJECTID_DELETED) {
|
|
yaffs_UpdateObjectHeader(in, NULL, 0,
|
|
(newSize < oldFileSize) ? 1 : 0, 0);
|
|
}
|
|
|
|
return newSize;
|
|
}
|
|
|
|
loff_t yaffs_GetFileSize(yaffs_Object * obj)
|
|
{
|
|
obj = yaffs_GetEquivalentObject(obj);
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
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
|
|
|
|
in->yst_mtime = Y_CURRENT_TIME;
|
|
|
|
#endif
|
|
}
|
|
|
|
retVal =
|
|
(yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
|
|
0) ? YAFFS_OK : YAFFS_FAIL;
|
|
} else {
|
|
retVal = YAFFS_OK;
|
|
}
|
|
|
|
return retVal;
|
|
|
|
}
|
|
|
|
static int yaffs_DoGenericObjectDeletion(yaffs_Object * in)
|
|
{
|
|
|
|
/* First off, invalidate the file's data in the cache, without flushing. */
|
|
yaffs_InvalidateWholeChunkCache(in);
|
|
|
|
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,"deleted", 0, 0);
|
|
|
|
}
|
|
|
|
yaffs_RemoveObjectFromDirectory(in);
|
|
yaffs_DeleteChunk(in->myDev, in->chunkId, 1, __LINE__);
|
|
in->chunkId = -1;
|
|
|
|
yaffs_FreeObject(in);
|
|
return YAFFS_OK;
|
|
|
|
}
|
|
|
|
/* 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_UnlinkFile(yaffs_Object * in)
|
|
{
|
|
|
|
int retVal;
|
|
int immediateDeletion = 0;
|
|
|
|
if (1) {
|
|
#ifdef __KERNEL__
|
|
if (!in->myInode) {
|
|
immediateDeletion = 1;
|
|
|
|
}
|
|
#else
|
|
if (in->inUse <= 0) {
|
|
immediateDeletion = 1;
|
|
|
|
}
|
|
#endif
|
|
if (immediateDeletion) {
|
|
retVal =
|
|
yaffs_ChangeObjectName(in, in->myDev->deletedDir,
|
|
"deleted", 0, 0);
|
|
T(YAFFS_TRACE_TRACING,
|
|
(TSTR("yaffs: immediate deletion of file %d" TENDSTR),
|
|
in->objectId));
|
|
in->deleted = 1;
|
|
in->myDev->nDeletedFiles++;
|
|
if (0 && in->myDev->isYaffs2) {
|
|
yaffs_ResizeFile(in, 0);
|
|
}
|
|
yaffs_SoftDeleteFile(in);
|
|
} else {
|
|
retVal =
|
|
yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
|
|
"unlinked", 0, 0);
|
|
}
|
|
|
|
}
|
|
return retVal;
|
|
}
|
|
|
|
int yaffs_DeleteFile(yaffs_Object * in)
|
|
{
|
|
int retVal = YAFFS_OK;
|
|
|
|
if (in->nDataChunks > 0) {
|
|
/* Use soft deletion if there is data in the file */
|
|
if (!in->unlinked) {
|
|
retVal = yaffs_UnlinkFile(in);
|
|
}
|
|
if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
|
|
in->deleted = 1;
|
|
in->myDev->nDeletedFiles++;
|
|
yaffs_SoftDeleteFile(in);
|
|
}
|
|
return in->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);
|
|
|
|
return YAFFS_OK;
|
|
}
|
|
}
|
|
|
|
static int yaffs_DeleteDirectory(yaffs_Object * in)
|
|
{
|
|
/* First check that the directory is empty. */
|
|
if (list_empty(&in->variant.directoryVariant.children)) {
|
|
return yaffs_DoGenericObjectDeletion(in);
|
|
}
|
|
|
|
return YAFFS_FAIL;
|
|
|
|
}
|
|
|
|
static int yaffs_DeleteSymLink(yaffs_Object * in)
|
|
{
|
|
YFREE(in->variant.symLinkVariant.alias);
|
|
|
|
return yaffs_DoGenericObjectDeletion(in);
|
|
}
|
|
|
|
static int yaffs_DeleteHardLink(yaffs_Object * in)
|
|
{
|
|
/* remove this hardlink from the list assocaited with the equivalent
|
|
* object
|
|
*/
|
|
list_del(&in->hardLinks);
|
|
return yaffs_DoGenericObjectDeletion(in);
|
|
}
|
|
|
|
static void yaffs_DestroyObject(yaffs_Object * obj)
|
|
{
|
|
switch (obj->variantType) {
|
|
case YAFFS_OBJECT_TYPE_FILE:
|
|
yaffs_DeleteFile(obj);
|
|
break;
|
|
case YAFFS_OBJECT_TYPE_DIRECTORY:
|
|
yaffs_DeleteDirectory(obj);
|
|
break;
|
|
case YAFFS_OBJECT_TYPE_SYMLINK:
|
|
yaffs_DeleteSymLink(obj);
|
|
break;
|
|
case YAFFS_OBJECT_TYPE_HARDLINK:
|
|
yaffs_DeleteHardLink(obj);
|
|
break;
|
|
case YAFFS_OBJECT_TYPE_SPECIAL:
|
|
yaffs_DoGenericObjectDeletion(obj);
|
|
break;
|
|
case YAFFS_OBJECT_TYPE_UNKNOWN:
|
|
break; /* should not happen. */
|
|
}
|
|
}
|
|
|
|
static int yaffs_UnlinkWorker(yaffs_Object * obj)
|
|
{
|
|
|
|
if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
|
|
return yaffs_DeleteHardLink(obj);
|
|
} else if (!list_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];
|
|
|
|
hl = list_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
|
|
|
|
list_del_init(&hl->hardLinks);
|
|
list_del_init(&hl->siblings);
|
|
|
|
yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
|
|
|
|
retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
|
|
|
|
if (retVal == YAFFS_OK) {
|
|
retVal = yaffs_DoGenericObjectDeletion(hl);
|
|
}
|
|
return retVal;
|
|
|
|
} else {
|
|
switch (obj->variantType) {
|
|
case YAFFS_OBJECT_TYPE_FILE:
|
|
return yaffs_UnlinkFile(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;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static int yaffs_UnlinkObject( yaffs_Object *obj)
|
|
{
|
|
|
|
if (obj && obj->unlinkAllowed) {
|
|
return yaffs_UnlinkWorker(obj);
|
|
}
|
|
|
|
return YAFFS_FAIL;
|
|
|
|
}
|
|
int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name)
|
|
{
|
|
yaffs_Object *obj;
|
|
|
|
obj = yaffs_FindObjectByName(dir, name);
|
|
return yaffs_UnlinkObject(obj);
|
|
}
|
|
|
|
/*----------------------- Initialisation Scanning ---------------------- */
|
|
|
|
static 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
|
|
*/
|
|
|
|
} else {
|
|
/* Handle YAFFS2 case (backward scanning)
|
|
* If the shadowed object exists then ignore.
|
|
*/
|
|
if (yaffs_FindObjectByNumber(dev, objId)) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* 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);
|
|
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 */
|
|
|
|
}
|
|
|
|
typedef struct {
|
|
int seq;
|
|
int block;
|
|
} yaffs_BlockIndex;
|
|
|
|
|
|
static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
|
|
{
|
|
yaffs_Object *hl;
|
|
yaffs_Object *in;
|
|
|
|
while (hardList) {
|
|
hl = hardList;
|
|
hardList = (yaffs_Object *) (hardList->hardLinks.next);
|
|
|
|
in = yaffs_FindObjectByNumber(dev,
|
|
hl->variant.hardLinkVariant.
|
|
equivalentObjectId);
|
|
|
|
if (in) {
|
|
/* Add the hardlink pointers */
|
|
hl->variant.hardLinkVariant.equivalentObject = in;
|
|
list_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;
|
|
INIT_LIST_HEAD(&hl->hardLinks);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
static int yaffs_Scan(yaffs_Device * dev)
|
|
{
|
|
yaffs_ExtendedTags tags;
|
|
int blk;
|
|
int blockIterator;
|
|
int startIterator;
|
|
int endIterator;
|
|
int nBlocksToScan = 0;
|
|
int result;
|
|
|
|
int chunk;
|
|
int c;
|
|
int deleted;
|
|
yaffs_BlockState state;
|
|
yaffs_Object *hardList = NULL;
|
|
yaffs_BlockInfo *bi;
|
|
int sequenceNumber;
|
|
yaffs_ObjectHeader *oh;
|
|
yaffs_Object *in;
|
|
yaffs_Object *parent;
|
|
int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
|
|
|
|
int alloc_failed = 0;
|
|
|
|
|
|
__u8 *chunkData;
|
|
|
|
yaffs_BlockIndex *blockIndex = NULL;
|
|
|
|
if (dev->isYaffs2) {
|
|
T(YAFFS_TRACE_SCAN,
|
|
(TSTR("yaffs_Scan is not for YAFFS2!" TENDSTR)));
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
//TODO Throw all the yaffs2 stuuf out of yaffs_Scan since it is only for yaffs1 format.
|
|
|
|
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;
|
|
|
|
if (dev->isYaffs2) {
|
|
blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
|
|
if(!blockIndex)
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
|
|
|
|
bi->blockState = state;
|
|
bi->sequenceNumber = sequenceNumber;
|
|
|
|
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->nChunksPerBlock;
|
|
} else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
|
|
|
|
/* Determine the highest sequence number */
|
|
if (dev->isYaffs2 &&
|
|
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 if (dev->isYaffs2) {
|
|
/* TODO: Nasty sequence number! */
|
|
T(YAFFS_TRACE_SCAN,
|
|
(TSTR
|
|
("Block scanning block %d has bad sequence number %d"
|
|
TENDSTR), blk, sequenceNumber));
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Sort the blocks
|
|
* Dungy old bubble sort for now...
|
|
*/
|
|
if (dev->isYaffs2) {
|
|
yaffs_BlockIndex temp;
|
|
int i;
|
|
int j;
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
/* Now scan the blocks looking at the data. */
|
|
if (dev->isYaffs2) {
|
|
startIterator = 0;
|
|
endIterator = nBlocksToScan - 1;
|
|
T(YAFFS_TRACE_SCAN_DEBUG,
|
|
(TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
|
|
} else {
|
|
startIterator = dev->internalStartBlock;
|
|
endIterator = dev->internalEndBlock;
|
|
}
|
|
|
|
/* For each block.... */
|
|
for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
|
|
blockIterator++) {
|
|
|
|
if (dev->isYaffs2) {
|
|
/* get the block to scan in the correct order */
|
|
blk = blockIndex[blockIterator].block;
|
|
} else {
|
|
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->nChunksPerBlock &&
|
|
state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
|
|
/* Read the tags and decide what to do */
|
|
chunk = blk * dev->nChunksPerBlock + c;
|
|
|
|
result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
|
|
&tags);
|
|
|
|
/* Let's have a good look at this chunk... */
|
|
|
|
if (!dev->isYaffs2 && 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. */
|
|
|
|
/* Yaffs2 sanity check:
|
|
* This should be the one with the highest sequence number
|
|
*/
|
|
if (dev->isYaffs2
|
|
&& (dev->sequenceNumber !=
|
|
bi->sequenceNumber)) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR
|
|
("yaffs: Allocation block %d was not highest sequence id:"
|
|
" block seq = %d, dev seq = %d"
|
|
TENDSTR), blk,bi->sequenceNumber,dev->sequenceNumber));
|
|
}
|
|
}
|
|
|
|
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).
|
|
*/
|
|
|
|
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->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_DestroyObject(in);
|
|
|
|
in = 0;
|
|
}
|
|
|
|
in = yaffs_FindOrCreateObjectByNumber(dev,
|
|
tags.
|
|
objectId,
|
|
oh->type);
|
|
|
|
if(!in)
|
|
alloc_failed = 1;
|
|
|
|
if (in && oh->shadowsObject > 0) {
|
|
yaffs_HandleShadowedObject(dev,
|
|
oh->
|
|
shadowsObject,
|
|
0);
|
|
}
|
|
|
|
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 (dev->isYaffs2 ||
|
|
((existingSerial + 1) & 3) ==
|
|
newSerial) {
|
|
/* Use new one - destroy the exisiting one */
|
|
yaffs_DeleteChunk(dev,
|
|
in->chunkId,
|
|
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->chunkId = chunk;
|
|
|
|
} 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->chunkId = chunk;
|
|
|
|
yaffs_SetObjectName(in, oh->name);
|
|
in->dirty = 0;
|
|
|
|
/* directory stuff...
|
|
* hook up to parent
|
|
*/
|
|
|
|
parent =
|
|
yaffs_FindOrCreateObjectByNumber
|
|
(dev, oh->parentObjectId,
|
|
YAFFS_OBJECT_TYPE_DIRECTORY);
|
|
if (parent->variantType ==
|
|
YAFFS_OBJECT_TYPE_UNKNOWN) {
|
|
/* Set up as a directory */
|
|
parent->variantType =
|
|
YAFFS_OBJECT_TYPE_DIRECTORY;
|
|
INIT_LIST_HEAD(&parent->variant.
|
|
directoryVariant.
|
|
children);
|
|
} else if (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->isYaffs2
|
|
&& oh->isShrink) {
|
|
/* Prune back the shrunken chunks */
|
|
yaffs_PruneResizedChunks
|
|
(in, oh->fileSize);
|
|
/* Mark the block as having a shrinkHeader */
|
|
bi->hasShrinkHeader = 1;
|
|
}
|
|
|
|
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 list_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 (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;
|
|
|
|
/* Now let's see if it was dirty */
|
|
if (bi->pagesInUse == 0 &&
|
|
!bi->hasShrinkHeader &&
|
|
bi->blockState == YAFFS_BLOCK_STATE_FULL) {
|
|
yaffs_BlockBecameDirty(dev, blk);
|
|
}
|
|
|
|
}
|
|
|
|
if (blockIndex) {
|
|
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);
|
|
|
|
/* Handle the unlinked files. Since they were left in an unlinked state we should
|
|
* just delete them.
|
|
*/
|
|
{
|
|
struct list_head *i;
|
|
struct list_head *n;
|
|
|
|
yaffs_Object *l;
|
|
/* Soft delete all the unlinked files */
|
|
list_for_each_safe(i, n,
|
|
&dev->unlinkedDir->variant.directoryVariant.
|
|
children) {
|
|
if (i) {
|
|
l = list_entry(i, yaffs_Object, siblings);
|
|
yaffs_DestroyObject(l);
|
|
}
|
|
}
|
|
}
|
|
|
|
yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
|
|
|
|
if(alloc_failed){
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
|
|
|
|
|
|
return YAFFS_OK;
|
|
}
|
|
|
|
static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
|
|
{
|
|
__u8 *chunkData;
|
|
yaffs_ObjectHeader *oh;
|
|
yaffs_Device *dev = in->myDev;
|
|
yaffs_ExtendedTags tags;
|
|
int result;
|
|
int alloc_failed = 0;
|
|
|
|
if(!in)
|
|
return;
|
|
|
|
#if 0
|
|
T(YAFFS_TRACE_SCAN,(TSTR("details for object %d %s loaded" TENDSTR),
|
|
in->objectId,
|
|
in->lazyLoaded ? "not yet" : "already"));
|
|
#endif
|
|
|
|
if(in->lazyLoaded){
|
|
in->lazyLoaded = 0;
|
|
chunkData = yaffs_GetTempBuffer(dev, __LINE__);
|
|
|
|
result = yaffs_ReadChunkWithTagsFromNAND(dev,in->chunkId,chunkData,&tags);
|
|
oh = (yaffs_ObjectHeader *) chunkData;
|
|
|
|
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
|
|
yaffs_SetObjectName(in, oh->name);
|
|
|
|
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 */
|
|
}
|
|
|
|
yaffs_ReleaseTempBuffer(dev,chunkData, __LINE__);
|
|
}
|
|
}
|
|
|
|
static int yaffs_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;
|
|
int 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;
|
|
|
|
if (!dev->isYaffs2) {
|
|
T(YAFFS_TRACE_SCAN,
|
|
(TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
T(YAFFS_TRACE_SCAN,
|
|
(TSTR
|
|
("yaffs_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("yaffs_Scan() 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 */
|
|
for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
|
|
bi = yaffs_GetBlockInfo(dev, 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;
|
|
|
|
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->nChunksPerBlock;
|
|
} else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
|
|
|
|
/* Determine the highest sequence number */
|
|
if (dev->isYaffs2 &&
|
|
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 if (dev->isYaffs2) {
|
|
/* TODO: Nasty sequence number! */
|
|
T(YAFFS_TRACE_SCAN,
|
|
(TSTR
|
|
("Block scanning block %d has bad sequence number %d"
|
|
TENDSTR), blk, sequenceNumber));
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
T(YAFFS_TRACE_SCAN,
|
|
(TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
|
|
|
|
|
|
|
|
YYIELD();
|
|
|
|
/* Sort the blocks */
|
|
#ifndef CONFIG_YAFFS_USE_OWN_SORT
|
|
yaffs_qsort(blockIndex, nBlocksToScan,
|
|
sizeof(yaffs_BlockIndex), ybicmp);
|
|
#else
|
|
{
|
|
/* Dungy old bubble sort... */
|
|
|
|
yaffs_BlockIndex temp;
|
|
int i;
|
|
int j;
|
|
|
|
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;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
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->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->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. This block must have
|
|
* had a write failure, so set up for retirement.
|
|
*/
|
|
|
|
bi->needsRetiring = 1;
|
|
bi->gcPrioritise = 1;
|
|
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR("Partially written block %d being set for retirement" TENDSTR),
|
|
blk));
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
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 =
|
|
(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;
|
|
}
|
|
|
|
} else if(in) {
|
|
/* This chunk has been invalidated by a resize, so delete */
|
|
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 ||
|
|
#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.
|
|
*/
|
|
|
|
result = yaffs_ReadChunkWithTagsFromNAND(dev,
|
|
chunk,
|
|
chunkData,
|
|
NULL);
|
|
|
|
oh = (yaffs_ObjectHeader *) chunkData;
|
|
|
|
if (!in)
|
|
in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
|
|
|
|
}
|
|
|
|
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));
|
|
|
|
}
|
|
|
|
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;
|
|
unsigned 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 &&
|
|
(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->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
|
|
} else {
|
|
in->variantType = tags.extraObjectType;
|
|
in->lazyLoaded = 1;
|
|
}
|
|
|
|
in->chunkId = chunk;
|
|
|
|
} else if (!in->valid) {
|
|
/* we need to load this info */
|
|
|
|
in->valid = 1;
|
|
in->chunkId = 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_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;
|
|
|
|
}
|
|
in->dirty = 0;
|
|
|
|
/* directory stuff...
|
|
* hook up to parent
|
|
*/
|
|
|
|
if (parent->variantType ==
|
|
YAFFS_OBJECT_TYPE_UNKNOWN) {
|
|
/* Set up as a directory */
|
|
parent->variantType =
|
|
YAFFS_OBJECT_TYPE_DIRECTORY;
|
|
INIT_LIST_HEAD(&parent->variant.
|
|
directoryVariant.
|
|
children);
|
|
} else if (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 =
|
|
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 list_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);
|
|
}
|
|
|
|
}
|
|
|
|
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);
|
|
|
|
|
|
/*
|
|
* Sort out state of unlinked and deleted objects.
|
|
*/
|
|
{
|
|
struct list_head *i;
|
|
struct list_head *n;
|
|
|
|
yaffs_Object *l;
|
|
|
|
/* Soft delete all the unlinked files */
|
|
list_for_each_safe(i, n,
|
|
&dev->unlinkedDir->variant.directoryVariant.
|
|
children) {
|
|
if (i) {
|
|
l = list_entry(i, yaffs_Object, siblings);
|
|
yaffs_DestroyObject(l);
|
|
}
|
|
}
|
|
|
|
/* Soft delete all the deletedDir files */
|
|
list_for_each_safe(i, n,
|
|
&dev->deletedDir->variant.directoryVariant.
|
|
children) {
|
|
if (i) {
|
|
l = list_entry(i, yaffs_Object, siblings);
|
|
yaffs_DestroyObject(l);
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
|
|
|
|
if(alloc_failed){
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
|
|
|
|
return YAFFS_OK;
|
|
}
|
|
|
|
/*------------------------------ Directory Functions ----------------------------- */
|
|
|
|
static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj)
|
|
{
|
|
yaffs_Device *dev = obj->myDev;
|
|
|
|
if(dev && dev->removeObjectCallback)
|
|
dev->removeObjectCallback(obj);
|
|
|
|
list_del_init(&obj->siblings);
|
|
obj->parent = NULL;
|
|
}
|
|
|
|
|
|
static void yaffs_AddObjectToDirectory(yaffs_Object * directory,
|
|
yaffs_Object * obj)
|
|
{
|
|
|
|
if (!directory) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR
|
|
("tragedy: Trying to add an object to a null pointer directory"
|
|
TENDSTR)));
|
|
YBUG();
|
|
}
|
|
if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR
|
|
("tragedy: Trying to add an object to a non-directory"
|
|
TENDSTR)));
|
|
YBUG();
|
|
}
|
|
|
|
if (obj->siblings.prev == NULL) {
|
|
/* Not initialised */
|
|
INIT_LIST_HEAD(&obj->siblings);
|
|
|
|
} else if (!list_empty(&obj->siblings)) {
|
|
/* If it is holed up somewhere else, un hook it */
|
|
yaffs_RemoveObjectFromDirectory(obj);
|
|
}
|
|
/* Now add it */
|
|
list_add(&obj->siblings, &directory->variant.directoryVariant.children);
|
|
obj->parent = directory;
|
|
|
|
if (directory == obj->myDev->unlinkedDir
|
|
|| directory == obj->myDev->deletedDir) {
|
|
obj->unlinked = 1;
|
|
obj->myDev->nUnlinkedFiles++;
|
|
obj->renameAllowed = 0;
|
|
}
|
|
}
|
|
|
|
yaffs_Object *yaffs_FindObjectByName(yaffs_Object * directory,
|
|
const YCHAR * name)
|
|
{
|
|
int sum;
|
|
|
|
struct list_head *i;
|
|
YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
|
|
|
|
yaffs_Object *l;
|
|
|
|
if (!name) {
|
|
return NULL;
|
|
}
|
|
|
|
if (!directory) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR
|
|
("tragedy: yaffs_FindObjectByName: null pointer directory"
|
|
TENDSTR)));
|
|
YBUG();
|
|
}
|
|
if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR
|
|
("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
|
|
YBUG();
|
|
}
|
|
|
|
sum = yaffs_CalcNameSum(name);
|
|
|
|
list_for_each(i, &directory->variant.directoryVariant.children) {
|
|
if (i) {
|
|
l = list_entry(i, yaffs_Object, siblings);
|
|
|
|
yaffs_CheckObjectDetailsLoaded(l);
|
|
|
|
/* Special case for lost-n-found */
|
|
if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
|
|
if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0) {
|
|
return l;
|
|
}
|
|
} else if (yaffs_SumCompare(l->sum, sum) || l->chunkId <= 0)
|
|
{
|
|
/* LostnFound cunk called Objxxx
|
|
* Do a real check
|
|
*/
|
|
yaffs_GetObjectName(l, buffer,
|
|
YAFFS_MAX_NAME_LENGTH);
|
|
if (yaffs_strncmp(name, buffer,YAFFS_MAX_NAME_LENGTH) == 0) {
|
|
return l;
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
#if 0
|
|
int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir,
|
|
int (*fn) (yaffs_Object *))
|
|
{
|
|
struct list_head *i;
|
|
yaffs_Object *l;
|
|
|
|
if (!theDir) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR
|
|
("tragedy: yaffs_FindObjectByName: null pointer directory"
|
|
TENDSTR)));
|
|
YBUG();
|
|
}
|
|
if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR
|
|
("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
|
|
YBUG();
|
|
}
|
|
|
|
list_for_each(i, &theDir->variant.directoryVariant.children) {
|
|
if (i) {
|
|
l = list_entry(i, yaffs_Object, siblings);
|
|
if (l && !fn(l)) {
|
|
return YAFFS_FAIL;
|
|
}
|
|
}
|
|
}
|
|
|
|
return YAFFS_OK;
|
|
|
|
}
|
|
#endif
|
|
|
|
/* GetEquivalentObject dereferences any hard links to get to the
|
|
* actual object.
|
|
*/
|
|
|
|
yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj)
|
|
{
|
|
if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
|
|
/* We want the object id of the equivalent object, not this one */
|
|
obj = obj->variant.hardLinkVariant.equivalentObject;
|
|
yaffs_CheckObjectDetailsLoaded(obj);
|
|
}
|
|
return obj;
|
|
|
|
}
|
|
|
|
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);
|
|
} else if (obj->chunkId <= 0) {
|
|
YCHAR locName[20];
|
|
/* make up a name */
|
|
yaffs_sprintf(locName, _Y("%s%d"), YAFFS_LOSTNFOUND_PREFIX,
|
|
obj->objectId);
|
|
yaffs_strncpy(name, locName, buffSize - 1);
|
|
|
|
}
|
|
#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
|
|
else if (obj->shortName[0]) {
|
|
yaffs_strcpy(name, obj->shortName);
|
|
}
|
|
#endif
|
|
else {
|
|
int result;
|
|
__u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
|
|
|
|
yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer;
|
|
|
|
memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
|
|
|
|
if (obj->chunkId >= 0) {
|
|
result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
|
|
obj->chunkId, buffer,
|
|
NULL);
|
|
}
|
|
yaffs_strncpy(name, oh->name, buffSize - 1);
|
|
|
|
yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
|
|
}
|
|
|
|
return yaffs_strlen(name);
|
|
}
|
|
|
|
int yaffs_GetObjectFileLength(yaffs_Object * obj)
|
|
{
|
|
|
|
/* Dereference any hard linking */
|
|
obj = yaffs_GetEquivalentObject(obj);
|
|
|
|
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 {
|
|
/* Only a directory should drop through to here */
|
|
return obj->myDev->nDataBytesPerChunk;
|
|
}
|
|
}
|
|
|
|
int yaffs_GetObjectLinkCount(yaffs_Object * obj)
|
|
{
|
|
int count = 0;
|
|
struct list_head *i;
|
|
|
|
if (!obj->unlinked) {
|
|
count++; /* the object itself */
|
|
}
|
|
list_for_each(i, &obj->hardLinks) {
|
|
count++; /* add the hard links; */
|
|
}
|
|
return count;
|
|
|
|
}
|
|
|
|
int yaffs_GetObjectInode(yaffs_Object * obj)
|
|
{
|
|
obj = yaffs_GetEquivalentObject(obj);
|
|
|
|
return obj->objectId;
|
|
}
|
|
|
|
unsigned yaffs_GetObjectType(yaffs_Object * obj)
|
|
{
|
|
obj = yaffs_GetEquivalentObject(obj);
|
|
|
|
switch (obj->variantType) {
|
|
case YAFFS_OBJECT_TYPE_FILE:
|
|
return DT_REG;
|
|
break;
|
|
case YAFFS_OBJECT_TYPE_DIRECTORY:
|
|
return DT_DIR;
|
|
break;
|
|
case YAFFS_OBJECT_TYPE_SYMLINK:
|
|
return DT_LNK;
|
|
break;
|
|
case YAFFS_OBJECT_TYPE_HARDLINK:
|
|
return DT_REG;
|
|
break;
|
|
case YAFFS_OBJECT_TYPE_SPECIAL:
|
|
if (S_ISFIFO(obj->yst_mode))
|
|
return DT_FIFO;
|
|
if (S_ISCHR(obj->yst_mode))
|
|
return DT_CHR;
|
|
if (S_ISBLK(obj->yst_mode))
|
|
return DT_BLK;
|
|
if (S_ISSOCK(obj->yst_mode))
|
|
return DT_SOCK;
|
|
default:
|
|
return DT_REG;
|
|
break;
|
|
}
|
|
}
|
|
|
|
YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj)
|
|
{
|
|
obj = yaffs_GetEquivalentObject(obj);
|
|
if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
|
|
return yaffs_CloneString(obj->variant.symLinkVariant.alias);
|
|
} else {
|
|
return yaffs_CloneString(_Y(""));
|
|
}
|
|
}
|
|
|
|
#ifndef CONFIG_YAFFS_WINCE
|
|
|
|
int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr)
|
|
{
|
|
unsigned int valid = attr->ia_valid;
|
|
|
|
if (valid & ATTR_MODE)
|
|
obj->yst_mode = attr->ia_mode;
|
|
if (valid & ATTR_UID)
|
|
obj->yst_uid = attr->ia_uid;
|
|
if (valid & ATTR_GID)
|
|
obj->yst_gid = attr->ia_gid;
|
|
|
|
if (valid & ATTR_ATIME)
|
|
obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
|
|
if (valid & ATTR_CTIME)
|
|
obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
|
|
if (valid & ATTR_MTIME)
|
|
obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
|
|
|
|
if (valid & ATTR_SIZE)
|
|
yaffs_ResizeFile(obj, attr->ia_size);
|
|
|
|
yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
|
|
|
|
return YAFFS_OK;
|
|
|
|
}
|
|
int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr)
|
|
{
|
|
unsigned int valid = 0;
|
|
|
|
attr->ia_mode = obj->yst_mode;
|
|
valid |= ATTR_MODE;
|
|
attr->ia_uid = obj->yst_uid;
|
|
valid |= ATTR_UID;
|
|
attr->ia_gid = obj->yst_gid;
|
|
valid |= ATTR_GID;
|
|
|
|
Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
|
|
valid |= ATTR_ATIME;
|
|
Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
|
|
valid |= ATTR_CTIME;
|
|
Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
|
|
valid |= ATTR_MTIME;
|
|
|
|
attr->ia_size = yaffs_GetFileSize(obj);
|
|
valid |= ATTR_SIZE;
|
|
|
|
attr->ia_valid = valid;
|
|
|
|
return YAFFS_OK;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
#if 0
|
|
int yaffs_DumpObject(yaffs_Object * obj)
|
|
{
|
|
YCHAR name[257];
|
|
|
|
yaffs_GetObjectName(obj, name, 256);
|
|
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR
|
|
("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d"
|
|
" chunk %d type %d size %d\n"
|
|
TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name,
|
|
obj->dirty, obj->valid, obj->serial, obj->sum, obj->chunkId,
|
|
yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
|
|
|
|
return YAFFS_OK;
|
|
}
|
|
#endif
|
|
|
|
/*---------------------------- Initialisation code -------------------------------------- */
|
|
|
|
static int yaffs_CheckDevFunctions(const yaffs_Device * dev)
|
|
{
|
|
|
|
/* Common functions, gotta have */
|
|
if (!dev->eraseBlockInNAND || !dev->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)
|
|
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)
|
|
return 1;
|
|
|
|
return 0; /* bad */
|
|
}
|
|
|
|
|
|
static int yaffs_CreateInitialDirectories(yaffs_Device *dev)
|
|
{
|
|
/* Initialise the unlinked, deleted, root and lost and found directories */
|
|
|
|
dev->lostNFoundDir = dev->rootDir = NULL;
|
|
dev->unlinkedDir = dev->deletedDir = NULL;
|
|
|
|
dev->unlinkedDir =
|
|
yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
|
|
|
|
dev->deletedDir =
|
|
yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
|
|
|
|
dev->rootDir =
|
|
yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT,
|
|
YAFFS_ROOT_MODE | S_IFDIR);
|
|
dev->lostNFoundDir =
|
|
yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
|
|
YAFFS_LOSTNFOUND_MODE | S_IFDIR);
|
|
|
|
if(dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir){
|
|
yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
|
|
return YAFFS_OK;
|
|
}
|
|
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
int yaffs_GutsInitialise(yaffs_Device * dev)
|
|
{
|
|
int init_failed = 0;
|
|
unsigned x;
|
|
int bits;
|
|
|
|
T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
|
|
|
|
/* Check stuff that must be set */
|
|
|
|
if (!dev) {
|
|
T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR)));
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
dev->internalStartBlock = dev->startBlock;
|
|
dev->internalEndBlock = dev->endBlock;
|
|
dev->blockOffset = 0;
|
|
dev->chunkOffset = 0;
|
|
dev->nFreeChunks = 0;
|
|
|
|
if (dev->startBlock == 0) {
|
|
dev->internalStartBlock = dev->startBlock + 1;
|
|
dev->internalEndBlock = dev->endBlock + 1;
|
|
dev->blockOffset = 1;
|
|
dev->chunkOffset = dev->nChunksPerBlock;
|
|
}
|
|
|
|
/* Check geometry parameters. */
|
|
|
|
if ((dev->isYaffs2 && dev->nDataBytesPerChunk < 1024) ||
|
|
(!dev->isYaffs2 && dev->nDataBytesPerChunk != 512) ||
|
|
dev->nChunksPerBlock < 2 ||
|
|
dev->nReservedBlocks < 2 ||
|
|
dev->internalStartBlock <= 0 ||
|
|
dev->internalEndBlock <= 0 ||
|
|
dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2) // otherwise it is too small
|
|
) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR
|
|
("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s "
|
|
TENDSTR), dev->nDataBytesPerChunk, dev->isYaffs2 ? "2" : ""));
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
if (yaffs_InitialiseNAND(dev) != YAFFS_OK) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
/* Got the right mix of functions? */
|
|
if (!yaffs_CheckDevFunctions(dev)) {
|
|
/* Function missing */
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR
|
|
("yaffs: device function(s) missing or wrong\n" TENDSTR)));
|
|
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
/* This is really a compilation check. */
|
|
if (!yaffs_CheckStructures()) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
if (dev->isMounted) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR("yaffs: device already mounted\n" TENDSTR)));
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
/* Finished with most checks. One or two more checks happen later on too. */
|
|
|
|
dev->isMounted = 1;
|
|
|
|
|
|
|
|
/* OK now calculate a few things for the device */
|
|
|
|
/*
|
|
* Calculate all the chunk size manipulation numbers:
|
|
*/
|
|
/* Start off assuming it is a power of 2 */
|
|
dev->chunkShift = ShiftDiv(dev->nDataBytesPerChunk);
|
|
dev->chunkMask = (1<<dev->chunkShift) - 1;
|
|
|
|
if(dev->nDataBytesPerChunk == (dev->chunkMask + 1)){
|
|
/* Yes it is a power of 2, disable crumbs */
|
|
dev->crumbMask = 0;
|
|
dev->crumbShift = 0;
|
|
dev->crumbsPerChunk = 0;
|
|
} else {
|
|
/* Not a power of 2, use crumbs instead */
|
|
dev->crumbShift = ShiftDiv(sizeof(yaffs_PackedTags2TagsPart));
|
|
dev->crumbMask = (1<<dev->crumbShift)-1;
|
|
dev->crumbsPerChunk = dev->nDataBytesPerChunk/(1 << dev->crumbShift);
|
|
dev->chunkShift = 0;
|
|
dev->chunkMask = 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Calculate chunkGroupBits.
|
|
* We need to find the next power of 2 > than internalEndBlock
|
|
*/
|
|
|
|
x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
|
|
|
|
bits = ShiftsGE(x);
|
|
|
|
/* Set up tnode width if wide tnodes are enabled. */
|
|
if(!dev->wideTnodesDisabled){
|
|
/* bits must be even so that we end up with 32-bit words */
|
|
if(bits & 1)
|
|
bits++;
|
|
if(bits < 16)
|
|
dev->tnodeWidth = 16;
|
|
else
|
|
dev->tnodeWidth = bits;
|
|
}
|
|
else
|
|
dev->tnodeWidth = 16;
|
|
|
|
dev->tnodeMask = (1<<dev->tnodeWidth)-1;
|
|
|
|
/* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
|
|
* so if the bitwidth of the
|
|
* chunk range we're using is greater than 16 we need
|
|
* to figure out chunk shift and chunkGroupSize
|
|
*/
|
|
|
|
if (bits <= dev->tnodeWidth)
|
|
dev->chunkGroupBits = 0;
|
|
else
|
|
dev->chunkGroupBits = bits - dev->tnodeWidth;
|
|
|
|
|
|
dev->chunkGroupSize = 1 << dev->chunkGroupBits;
|
|
|
|
if (dev->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".
|
|
*/
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR("yaffs: chunk group too large\n" TENDSTR)));
|
|
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
/* OK, we've finished verifying the device, lets continue with initialisation */
|
|
|
|
/* More device initialisation */
|
|
dev->garbageCollections = 0;
|
|
dev->passiveGarbageCollections = 0;
|
|
dev->currentDirtyChecker = 0;
|
|
dev->bufferedBlock = -1;
|
|
dev->doingBufferedBlockRewrite = 0;
|
|
dev->nDeletedFiles = 0;
|
|
dev->nBackgroundDeletions = 0;
|
|
dev->nUnlinkedFiles = 0;
|
|
dev->eccFixed = 0;
|
|
dev->eccUnfixed = 0;
|
|
dev->tagsEccFixed = 0;
|
|
dev->tagsEccUnfixed = 0;
|
|
dev->nErasureFailures = 0;
|
|
dev->nErasedBlocks = 0;
|
|
dev->isDoingGC = 0;
|
|
dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
|
|
|
|
/* Initialise temporary buffers and caches. */
|
|
if(!yaffs_InitialiseTempBuffers(dev))
|
|
init_failed = 1;
|
|
|
|
dev->srCache = NULL;
|
|
dev->gcCleanupList = NULL;
|
|
|
|
|
|
if (!init_failed &&
|
|
dev->nShortOpCaches > 0) {
|
|
int i;
|
|
__u8 *buf;
|
|
int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
|
|
|
|
if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES) {
|
|
dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
|
|
}
|
|
|
|
buf = dev->srCache = YMALLOC(srCacheBytes);
|
|
|
|
if(dev->srCache)
|
|
memset(dev->srCache,0,srCacheBytes);
|
|
|
|
for (i = 0; i < dev->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->nDataBytesPerChunk);
|
|
}
|
|
if(!buf)
|
|
init_failed = 1;
|
|
|
|
dev->srLastUse = 0;
|
|
}
|
|
|
|
dev->cacheHits = 0;
|
|
|
|
if(!init_failed){
|
|
dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
|
|
if(!dev->gcCleanupList)
|
|
init_failed = 1;
|
|
}
|
|
|
|
if (dev->isYaffs2) {
|
|
dev->useHeaderFileSize = 1;
|
|
}
|
|
if(!init_failed && !yaffs_InitialiseBlocks(dev))
|
|
init_failed = 1;
|
|
|
|
yaffs_InitialiseTnodes(dev);
|
|
yaffs_InitialiseObjects(dev);
|
|
|
|
if(!init_failed && !yaffs_CreateInitialDirectories(dev))
|
|
init_failed = 1;
|
|
|
|
|
|
if(!init_failed){
|
|
/* Now scan the flash. */
|
|
if (dev->isYaffs2) {
|
|
if(yaffs_CheckpointRestore(dev)) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR("yaffs: restored from checkpoint" TENDSTR)));
|
|
} else {
|
|
|
|
/* Clean up the mess caused by an aborted checkpoint load
|
|
* and scan backwards.
|
|
*/
|
|
yaffs_DeinitialiseBlocks(dev);
|
|
yaffs_DeinitialiseTnodes(dev);
|
|
yaffs_DeinitialiseObjects(dev);
|
|
|
|
|
|
dev->nErasedBlocks = 0;
|
|
dev->nFreeChunks = 0;
|
|
dev->allocationBlock = -1;
|
|
dev->allocationPage = -1;
|
|
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);
|
|
|
|
if(!init_failed && !yaffs_CreateInitialDirectories(dev))
|
|
init_failed = 1;
|
|
|
|
if(!init_failed && !yaffs_ScanBackwards(dev))
|
|
init_failed = 1;
|
|
}
|
|
}else
|
|
if(!yaffs_Scan(dev))
|
|
init_failed = 1;
|
|
}
|
|
|
|
if(init_failed){
|
|
/* Clean up the mess */
|
|
T(YAFFS_TRACE_TRACING,
|
|
(TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR)));
|
|
|
|
yaffs_Deinitialise(dev);
|
|
return YAFFS_FAIL;
|
|
}
|
|
|
|
/* Zero out stats */
|
|
dev->nPageReads = 0;
|
|
dev->nPageWrites = 0;
|
|
dev->nBlockErasures = 0;
|
|
dev->nGCCopies = 0;
|
|
dev->nRetriedWrites = 0;
|
|
|
|
dev->nRetiredBlocks = 0;
|
|
|
|
yaffs_VerifyFreeChunks(dev);
|
|
yaffs_VerifyBlocks(dev);
|
|
|
|
|
|
T(YAFFS_TRACE_TRACING,
|
|
(TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
|
|
return YAFFS_OK;
|
|
|
|
}
|
|
|
|
void yaffs_Deinitialise(yaffs_Device * dev)
|
|
{
|
|
if (dev->isMounted) {
|
|
int i;
|
|
|
|
yaffs_DeinitialiseBlocks(dev);
|
|
yaffs_DeinitialiseTnodes(dev);
|
|
yaffs_DeinitialiseObjects(dev);
|
|
if (dev->nShortOpCaches > 0 &&
|
|
dev->srCache) {
|
|
|
|
for (i = 0; i < dev->nShortOpCaches; i++) {
|
|
if(dev->srCache[i].data)
|
|
YFREE(dev->srCache[i].data);
|
|
dev->srCache[i].data = NULL;
|
|
}
|
|
|
|
YFREE(dev->srCache);
|
|
dev->srCache = NULL;
|
|
}
|
|
|
|
YFREE(dev->gcCleanupList);
|
|
|
|
for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
|
|
YFREE(dev->tempBuffer[i].buffer);
|
|
}
|
|
|
|
dev->isMounted = 0;
|
|
}
|
|
|
|
}
|
|
|
|
static int yaffs_CountFreeChunks(yaffs_Device * dev)
|
|
{
|
|
int nFree;
|
|
int b;
|
|
|
|
yaffs_BlockInfo *blk;
|
|
|
|
for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
|
|
b++) {
|
|
blk = yaffs_GetBlockInfo(dev, 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 +
|
|
blk->softDeletions);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
return nFree;
|
|
}
|
|
|
|
int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev)
|
|
{
|
|
/* This is what we report to the outside world */
|
|
|
|
int nFree;
|
|
int nDirtyCacheChunks;
|
|
int blocksForCheckpoint;
|
|
|
|
#if 1
|
|
nFree = dev->nFreeChunks;
|
|
#else
|
|
nFree = yaffs_CountFreeChunks(dev);
|
|
#endif
|
|
|
|
nFree += dev->nDeletedFiles;
|
|
|
|
/* Now count the number of dirty chunks in the cache and subtract those */
|
|
|
|
{
|
|
int i;
|
|
for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
|
|
if (dev->srCache[i].dirty)
|
|
nDirtyCacheChunks++;
|
|
}
|
|
}
|
|
|
|
nFree -= nDirtyCacheChunks;
|
|
|
|
nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
|
|
|
|
/* Now we figure out how much to reserve for the checkpoint and report that... */
|
|
blocksForCheckpoint = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint;
|
|
if(blocksForCheckpoint < 0)
|
|
blocksForCheckpoint = 0;
|
|
|
|
nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
|
|
|
|
if (nFree < 0)
|
|
nFree = 0;
|
|
|
|
return nFree;
|
|
|
|
}
|
|
|
|
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 ----------------------*/
|
|
|
|
#define yaffs_CheckStruct(structure,syze, name) \
|
|
if(sizeof(structure) != syze) \
|
|
{ \
|
|
T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),\
|
|
name,syze,sizeof(structure))); \
|
|
return YAFFS_FAIL; \
|
|
}
|
|
|
|
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_ObjectHeader, 512, "yaffs_ObjectHeader")
|
|
|
|
return YAFFS_OK;
|
|
}
|