-
/*
- * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002 Aleph One Ltd.
+ * Copyright (C) 2002-2007 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
- *
*/
- //yaffs_guts.c
-const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.5 2005-03-16 04:00:36 charles Exp $";
+const char *yaffs_guts_c_version =
+ "$Id: yaffs_guts.c,v 1.67 2008-11-27 02:46:45 charles Exp $";
#include "yportenv.h"
#include "yaffsinterface.h"
#include "yaffs_guts.h"
+#include "yaffs_tagsvalidity.h"
+#include "yaffs_getblockinfo.h"
#include "yaffs_tagscompat.h"
+#ifndef CONFIG_YAFFS_USE_OWN_SORT
+#include "yaffs_qsort.h"
+#endif
+#include "yaffs_nand.h"
+
+#include "yaffs_checkptrw.h"
+
+#include "yaffs_nand.h"
+#include "yaffs_packedtags2.h"
+
#ifdef CONFIG_YAFFS_WINCE
void yfsd_LockYAFFS(BOOL fsLockOnly);
#define YAFFS_PASSIVE_GC_CHUNKS 2
-#if 0
-// Use Steven Hill's ECC struff instead
-// External functions for ECC on data
-void nand_calculate_ecc (const u_char *dat, u_char *ecc_code);
-int nand_correct_data (u_char *dat, u_char *read_ecc, u_char *calc_ecc);
-#define yaffs_ECCCalculate(data,ecc) nand_calculate_ecc(data,ecc)
-#define yaffs_ECCCorrect(data,read_ecc,calc_ecc) nand_correct_ecc(data,read_ecc,calc_ecc)
-#else
#include "yaffs_ecc.h"
-#endif
-
-// countBits is a quick way of counting the number of bits in a byte.
-// ie. countBits[n] holds the number of 1 bits in a byte with the value n.
-
-static const char yaffs_countBitsTable[256] =
-{
-0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,
-1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
-1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
-2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
-1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
-2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
-2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
-3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
-1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
-2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
-2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
-3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
-2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
-3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
-3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
-4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8
-};
-
-static int yaffs_CountBits(__u8 x)
-{
- int retVal;
- retVal = yaffs_countBitsTable[x];
- return retVal;
-}
-#if 0
-// Stuff using yea olde tags
-static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr);
-static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr);
-
-static int yaffs_ReadChunkTagsFromNAND(yaffs_Device *dev,int chunkInNAND, yaffs_Tags *tags, int *chunkDeleted);
-static int yaffs_TagsMatch(const yaffs_Tags *tags, int objectId, int chunkInObject, int chunkDeleted);
-#else
-#endif
-
-// NAND access
-
-
-static Y_INLINE int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *buffer, yaffs_ExtendedTags *tags);
-static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND, const __u8 *data, yaffs_ExtendedTags *tags);
-static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo);
-static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device *dev,int blockNo, yaffs_BlockState *state,unsigned *sequenceNumber);
-// Local prototypes
-static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev, const __u8 *buffer, yaffs_ExtendedTags *tags, int useReserve);
-static int yaffs_CheckObjectHashSanity(yaffs_Device *dev);
-static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkInNAND, int inScan);
-
-static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev,int number,yaffs_ObjectType type);
-static void yaffs_AddObjectToDirectory(yaffs_Object *directory, yaffs_Object *obj);
-static int yaffs_UpdateObjectHeader(yaffs_Object *in,const YCHAR *name, int force,int isShrink);
-static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
+/* Robustification (if it ever comes about...) */
+static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND);
+static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk);
+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);
+
+/* Other local prototypes */
+static int yaffs_UnlinkObject( yaffs_Object *obj);
+static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
+
+static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
+
+static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device * dev,
+ const __u8 * buffer,
+ yaffs_ExtendedTags * tags,
+ int useReserve);
+static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode,
+ int chunkInNAND, int inScan);
+
+static yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number,
+ yaffs_ObjectType type);
+static void yaffs_AddObjectToDirectory(yaffs_Object * directory,
+ yaffs_Object * obj);
+static int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name,
+ int force, int isShrink, int shadows);
+static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj);
static int yaffs_CheckStructures(void);
-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, int chunkOffset,int *limit);
-static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
+static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level,
+ int chunkOffset, int *limit);
+static int yaffs_DoGenericObjectDeletion(yaffs_Object * in);
-static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev,int blockNo);
+static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blockNo);
-static __u8 *yaffs_GetTempBuffer(yaffs_Device *dev,int lineNo);
-static void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo);
+static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
+ int chunkInNAND);
-static int yaffs_ValidateTags(yaffs_ExtendedTags *tags);
+static int yaffs_UnlinkWorker(yaffs_Object * obj);
+static void yaffs_DestroyObject(yaffs_Object * obj);
-// Robustification (if it ever comes about...)
-static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND);
-static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND);
-static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND);
-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);
+static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId,
+ int chunkInObject);
-static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND);
+loff_t yaffs_GetFileSize(yaffs_Object * obj);
-static int yaffs_UnlinkWorker(yaffs_Object *obj);
-static void yaffs_DestroyObject(yaffs_Object *obj);
-
-#if 0
-static int yaffs_VerifyCompare(const __u8 *d0, const __u8 * d1, const yaffs_Spare *s0, const yaffs_Spare *s1,int dataSize);
-#endif
-
-static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId, int chunkInObject);
+static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr);
+static void yaffs_VerifyFreeChunks(yaffs_Device * dev);
-loff_t yaffs_GetFileSize(yaffs_Object *obj);
-
-
-static int yaffs_AllocateChunk(yaffs_Device *dev,int useReserve);
+static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
+static void yaffs_VerifyDirectory(yaffs_Object *directory);
#ifdef YAFFS_PARANOID
-static int yaffs_CheckFileSanity(yaffs_Object *in);
+static int yaffs_CheckFileSanity(yaffs_Object * in);
#else
#define yaffs_CheckFileSanity(in)
#endif
-static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
-static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
+static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in);
+static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId);
+
+static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
+
+static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode,
+ yaffs_ExtendedTags * tags);
+
+static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos);
+static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev,
+ yaffs_FileStructure * fStruct,
+ __u32 chunkId);
-static int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *buffer, yaffs_ExtendedTags *tags)
-{
- if(dev->readChunkWithTagsFromNAND)
- return dev->readChunkWithTagsFromNAND(dev,chunkInNAND,buffer,tags);
- else
- return yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,chunkInNAND,buffer,tags);
-}
-static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND, const __u8 *buffer, yaffs_ExtendedTags *tags)
+/* Function to calculate chunk and offset */
+
+static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut, __u32 *offsetOut)
{
- if(tags)
+ int chunk;
+ __u32 offset;
+
+ chunk = (__u32)(addr >> dev->chunkShift);
+
+ if(dev->chunkDiv == 1)
{
- tags->sequenceNumber = dev->sequenceNumber;
- tags->chunkUsed = 1;
- if(!yaffs_ValidateTags(tags))
- {
- T(YAFFS_TRACE_ERROR,(TSTR("Writing uninitialised tags" TENDSTR)));
- YBUG();
- }
- T(YAFFS_TRACE_WRITE,(TSTR("Writing chunk %d tags %d %d"TENDSTR),chunkInNAND,tags->objectId,tags->chunkId));
+ /* easy power of 2 case */
+ offset = (__u32)(addr & dev->chunkMask);
}
else
{
- T(YAFFS_TRACE_ERROR,(TSTR("Writing with no tags" TENDSTR)));
- YBUG();
+ /* Non power-of-2 case */
+
+ loff_t chunkBase;
+
+ chunk /= dev->chunkDiv;
+
+ chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk;
+ offset = (__u32)(addr - chunkBase);
}
- if(dev->writeChunkWithTagsToNAND)
- return dev->writeChunkWithTagsToNAND(dev,chunkInNAND,buffer,tags);
- else
- return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,chunkInNAND,buffer,tags);
+ *chunkOut = chunk;
+ *offsetOut = offset;
}
-static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo)
+/* Function to return the number of shifts for a power of 2 greater than or equal
+ * to the given number
+ * Note we don't try to cater for all possible numbers and this does not have to
+ * be hellishly efficient.
+ */
+
+static __u32 ShiftsGE(__u32 x)
{
- if(dev->markNANDBlockBad)
- return dev->markNANDBlockBad(dev,blockNo);
- else
- return yaffs_TagsCompatabilityMarkNANDBlockBad(dev,blockNo);
+ int extraBits;
+ int nShifts;
+
+ nShifts = extraBits = 0;
+
+ while(x>1){
+ if(x & 1) extraBits++;
+ x>>=1;
+ nShifts++;
+ }
+
+ if(extraBits)
+ nShifts++;
+
+ return nShifts;
}
-static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device *dev,int blockNo, yaffs_BlockState *state, unsigned *sequenceNumber)
+
+/* Function to return the number of shifts to get a 1 in bit 0
+ */
+
+static __u32 Shifts(__u32 x)
{
- if(dev->queryNANDBlock)
- return dev->queryNANDBlock(dev,blockNo,state,sequenceNumber);
- else
- return yaffs_TagsCompatabilityQueryNANDBlock(dev,blockNo,state,sequenceNumber);
+ int nShifts;
+
+ nShifts = 0;
+
+ if(!x) return 0;
+
+ while( !(x&1)){
+ x>>=1;
+ nShifts++;
+ }
+
+ return nShifts;
}
-int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,int blockInNAND)
-{
- int result;
- dev->nBlockErasures++;
- result = dev->eraseBlockInNAND(dev,blockInNAND);
- if(!result)result = dev->eraseBlockInNAND(dev,blockInNAND); // If at first we don't succeed, try again *once*.
- return result;
-}
+/*
+ * Temporary buffer manipulations.
+ */
-static int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
+static int yaffs_InitialiseTempBuffers(yaffs_Device *dev)
{
- return dev->initialiseNAND(dev);
+ int i;
+ __u8 *buf = (__u8 *)1;
+
+ memset(dev->tempBuffer,0,sizeof(dev->tempBuffer));
+
+ for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
+ dev->tempBuffer[i].line = 0; /* not in use */
+ dev->tempBuffer[i].buffer = buf =
+ YMALLOC_DMA(dev->totalBytesPerChunk);
+ }
+
+ return buf ? YAFFS_OK : YAFFS_FAIL;
+
}
+__u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo)
+{
+ int i, j;
+ dev->tempInUse++;
+ if(dev->tempInUse > dev->maxTemp)
+ dev->maxTemp = dev->tempInUse;
-
-// Temporary buffer manipulations
-
-static __u8 *yaffs_GetTempBuffer(yaffs_Device *dev,int lineNo)
-{
- int i,j;
- for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
- {
- if(dev->tempBuffer[i].line == 0)
- {
+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
+ if (dev->tempBuffer[i].line == 0) {
dev->tempBuffer[i].line = lineNo;
- if((i+1) > dev->maxTemp)
- {
+ if ((i + 1) > dev->maxTemp) {
dev->maxTemp = i + 1;
- for(j = 0; j <= i; j++)
- dev->tempBuffer[j].maxLine = dev->tempBuffer[j].line;
- }
-
+ for (j = 0; j <= i; j++)
+ dev->tempBuffer[j].maxLine =
+ dev->tempBuffer[j].line;
+ }
+
return dev->tempBuffer[i].buffer;
}
}
- T(YAFFS_TRACE_BUFFERS,(TSTR("Out of temp buffers at line %d, other held by lines:"),lineNo));
- for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
- {
- T(YAFFS_TRACE_BUFFERS,(TSTR(" %d "),dev->tempBuffer[i].line));
+ T(YAFFS_TRACE_BUFFERS,
+ (TSTR("Out of temp buffers at line %d, other held by lines:"),
+ lineNo));
+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
+ T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line));
}
- T(YAFFS_TRACE_BUFFERS,(TSTR(" "TENDSTR)));
-
+ T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR)));
+
+ /*
+ * If we got here then we have to allocate an unmanaged one
+ * This is not good.
+ */
+
dev->unmanagedTempAllocations++;
- // Get an unmanaged one
- return YMALLOC(dev->nBytesPerChunk);
-
-
+ return YMALLOC(dev->nDataBytesPerChunk);
+
}
-static void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo)
+void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer,
+ int lineNo)
{
int i;
- for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
- {
- if(dev->tempBuffer[i].buffer == buffer)
- {
+
+ dev->tempInUse--;
+
+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
+ if (dev->tempBuffer[i].buffer == buffer) {
dev->tempBuffer[i].line = 0;
return;
}
}
-
- if(buffer)
- {
- // assume it is an unmanaged one.
- T(YAFFS_TRACE_BUFFERS,(TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),lineNo));
+
+ if (buffer) {
+ /* assume it is an unmanaged one. */
+ T(YAFFS_TRACE_BUFFERS,
+ (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),
+ lineNo));
YFREE(buffer);
dev->unmanagedTempDeallocations++;
}
}
+/*
+ * Determine if we have a managed buffer.
+ */
+int yaffs_IsManagedTempBuffer(yaffs_Device * dev, const __u8 * buffer)
+{
+ int i;
+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
+ if (dev->tempBuffer[i].buffer == buffer)
+ return 1;
+
+ }
+
+ for (i = 0; i < dev->nShortOpCaches; i++) {
+ if( dev->srCache[i].data == buffer )
+ return 1;
+
+ }
+
+ if (buffer == dev->checkpointBuffer)
+ return 1;
+
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
+ return 0;
+}
+
+
-// Chunk bitmap manipulations
+/*
+ * Chunk bitmap manipulations
+ */
-static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
+static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device * dev, int blk)
{
- if(blk < dev->startBlock || blk > dev->endBlock)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),blk));
+ if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
+ blk));
YBUG();
}
- return dev->chunkBits + (dev->chunkBitmapStride * (blk - dev->startBlock));
+ return dev->chunkBits +
+ (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
+}
+
+static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
+{
+ if(blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
+ chunk < 0 || chunk >= dev->nChunksPerBlock) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),blk,chunk));
+ YBUG();
+ }
}
-static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev,int blk)
+static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device * dev, int blk)
{
- __u8 *blkBits = yaffs_BlockBits(dev,blk);
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
- memset(blkBits,0,dev->chunkBitmapStride);
+ memset(blkBits, 0, dev->chunkBitmapStride);
}
-static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev,int blk,int chunk)
+static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device * dev, int blk, int chunk)
{
- __u8 *blkBits = yaffs_BlockBits(dev,blk);
-
- blkBits[chunk/8] &= ~ (1<<(chunk & 7));
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
+
+ yaffs_VerifyChunkBitId(dev,blk,chunk);
+
+ blkBits[chunk / 8] &= ~(1 << (chunk & 7));
}
-static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev,int blk,int chunk)
+static Y_INLINE void yaffs_SetChunkBit(yaffs_Device * dev, int blk, int chunk)
{
- __u8 *blkBits = yaffs_BlockBits(dev,blk);
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
+
+ yaffs_VerifyChunkBitId(dev,blk,chunk);
- blkBits[chunk/8] |= (1<<(chunk & 7));
+ blkBits[chunk / 8] |= (1 << (chunk & 7));
}
-static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev,int blk,int chunk)
+static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device * dev, int blk, int chunk)
{
- __u8 *blkBits = yaffs_BlockBits(dev,blk);
- return (blkBits[chunk/8] & (1<<(chunk & 7))) ? 1 :0;
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
+ yaffs_VerifyChunkBitId(dev,blk,chunk);
+
+ return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
}
-static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev,int blk)
+static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device * dev, int blk)
{
- __u8 *blkBits = yaffs_BlockBits(dev,blk);
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
int i;
- for(i = 0; i < dev->chunkBitmapStride; i++)
- {
- if(*blkBits) return 1;
+ for (i = 0; i < dev->chunkBitmapStride; i++) {
+ if (*blkBits)
+ return 1;
blkBits++;
}
return 0;
}
-#if 0
-// Function to manipulate block info
-static Y_INLINE yaffs_BlockInfo* yaffs_GetBlockInfo(yaffs_Device *dev, int blk)
+static int yaffs_CountChunkBits(yaffs_Device * dev, int blk)
{
- if(blk < dev->startBlock || blk > dev->endBlock)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),blk));
- YBUG();
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
+ int i;
+ int n = 0;
+ for (i = 0; i < dev->chunkBitmapStride; i++) {
+ __u8 x = *blkBits;
+ while(x){
+ if(x & 1)
+ n++;
+ x >>=1;
+ }
+
+ blkBits++;
}
- return &dev->blockInfo[blk - dev->startBlock];
+ return n;
}
-#endif
-
-static Y_INLINE int yaffs_HashFunction(int n)
+/*
+ * Verification code
+ */
+
+static int yaffs_SkipVerification(yaffs_Device *dev)
{
- return (n % YAFFS_NOBJECT_BUCKETS);
+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
}
-
-yaffs_Object *yaffs_Root(yaffs_Device *dev)
+#if 0
+static int yaffs_SkipFullVerification(yaffs_Device *dev)
{
- return dev->rootDir;
+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
}
-yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
-{
- return dev->lostNFoundDir;
-}
+#endif
-#if 0
-static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev,int chunkInNAND, const __u8 *data, yaffs_Spare *spare)
+static int yaffs_SkipNANDVerification(yaffs_Device *dev)
{
- if(chunkInNAND < dev->startBlock * dev->nChunksPerBlock)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs chunk %d is not valid" TENDSTR),chunkInNAND));
- return YAFFS_FAIL;
- }
-
- dev->nPageWrites++;
- return dev->writeChunkToNAND(dev,chunkInNAND,data,spare);
+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
}
+static const char * blockStateName[] = {
+"Unknown",
+"Needs scanning",
+"Scanning",
+"Empty",
+"Allocating",
+"Full",
+"Dirty",
+"Checkpoint",
+"Collecting",
+"Dead"
+};
-
-static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
- int chunkInNAND,
- __u8 *data,
- yaffs_Spare *spare,
- int doErrorCorrection)
+static void yaffs_VerifyBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n)
{
- int retVal;
- yaffs_Spare localSpare;
-
- dev->nPageReads++;
+ int actuallyUsed;
+ int inUse;
+
+ if(yaffs_SkipVerification(dev))
+ return;
+
+ /* Report illegal runtime states */
+ if(bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has undefined state %d"TENDSTR),n,bi->blockState));
+
+ switch(bi->blockState){
+ case YAFFS_BLOCK_STATE_UNKNOWN:
+ case YAFFS_BLOCK_STATE_SCANNING:
+ case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has bad run-state %s"TENDSTR),
+ n,blockStateName[bi->blockState]));
+ }
+ /* Check pages in use and soft deletions are legal */
-
+ actuallyUsed = bi->pagesInUse - bi->softDeletions;
- if(!spare && data)
- {
- // If we don't have a real spare, then we use a local one.
- // Need this for the calculation of the ecc
- spare = &localSpare;
- }
+ if(bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
+ bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
+ actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
+ n,bi->pagesInUse,bi->softDeletions));
+
+
+ /* Check chunk bitmap legal */
+ inUse = yaffs_CountChunkBits(dev,n);
+ if(inUse != bi->pagesInUse)
+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
+ n,bi->pagesInUse,inUse));
+ /* Check that the sequence number is valid.
+ * Ten million is legal, but is very unlikely
+ */
+ if(dev->isYaffs2 &&
+ (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
+ (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000 ))
+ T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has suspect sequence number of %d"TENDSTR),
+ n,bi->sequenceNumber));
+
+}
- if(!dev->useNANDECC)
- {
- retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,spare);
- if(data && doErrorCorrection)
- {
- // Do ECC correction
- //Todo handle any errors
- int eccResult1,eccResult2;
- __u8 calcEcc[3];
-
- yaffs_ECCCalculate(data,calcEcc);
- eccResult1 = yaffs_ECCCorrect (data,spare->ecc1, calcEcc);
- yaffs_ECCCalculate(&data[256],calcEcc);
- eccResult2 = yaffs_ECCCorrect(&data[256],spare->ecc2, calcEcc);
-
- if(eccResult1>0)
- {
- T(YAFFS_TRACE_ERROR, (TSTR("**>>ecc error fix performed on chunk %d:0" TENDSTR),chunkInNAND));
- dev->eccFixed++;
- }
- else if(eccResult1<0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND));
- dev->eccUnfixed++;
- }
+static void yaffs_VerifyCollectedBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n)
+{
+ yaffs_VerifyBlock(dev,bi,n);
+
+ /* After collection the block should be in the erased state */
+ /* TODO: This will need to change if we do partial gc */
+
+ if(bi->blockState != YAFFS_BLOCK_STATE_EMPTY){
+ T(YAFFS_TRACE_ERROR,(TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
+ n,bi->blockState));
+ }
+}
- if(eccResult2>0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND));
- dev->eccFixed++;
- }
- else if(eccResult2<0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND));
- dev->eccUnfixed++;
- }
+static void yaffs_VerifyBlocks(yaffs_Device *dev)
+{
+ int i;
+ int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
+ int nIllegalBlockStates = 0;
+
- if(eccResult1 || eccResult2)
- {
- // Hoosterman, we had a data problem on this page
- yaffs_HandleReadDataError(dev,chunkInNAND);
- }
- }
- }
- else
- {
- // Must allocate enough memory for spare+2*sizeof(int) for ecc results from device.
- struct yaffs_NANDSpare nspare;
- retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare*)&nspare);
- memcpy (spare, &nspare, sizeof(yaffs_Spare));
- if(data && doErrorCorrection)
- {
- if(nspare.eccres1>0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:0" TENDSTR),chunkInNAND));
- }
- else if(nspare.eccres1<0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND));
- }
+ if(yaffs_SkipVerification(dev))
+ return;
- if(nspare.eccres2>0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND));
- }
- else if(nspare.eccres2<0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND));
- }
+ memset(nBlocksPerState,0,sizeof(nBlocksPerState));
- if(nspare.eccres1 || nspare.eccres2)
- {
- // Hoosterman, we had a data problem on this page
- yaffs_HandleReadDataError(dev,chunkInNAND);
- }
+
+ for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++){
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i);
+ yaffs_VerifyBlock(dev,bi,i);
- }
+ if(bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
+ nBlocksPerState[bi->blockState]++;
+ else
+ nIllegalBlockStates++;
+
}
- return retVal;
-}
+
+ 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)));
-#endif
+ 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)));
+}
-int yaffs_CheckFF(__u8 *buffer,int nBytes)
+/*
+ * 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)
{
- //Horrible, slow implementation
- while(nBytes--)
- {
- if(*buffer != 0xFF) return 0;
- buffer++;
+ if(obj && 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;
}
- return 1;
-}
+
+ 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));
-static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND)
-{
+ if(tags->objectId != obj->objectId)
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
+ tags->objectId, obj->objectId));
- int retval = YAFFS_OK;
- __u8 *data = yaffs_GetTempBuffer(dev,__LINE__);
- yaffs_ExtendedTags tags;
-// NCB dev->readChunkWithTagsFromNAND(dev,chunkInNAND,data,&tags);
- yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND,data,&tags);
+ /*
+ * Check that the object's parent ids match if parentCheck requested.
+ *
+ * Tests do not apply to the root object.
+ */
- if(!yaffs_CheckFF(data,dev->nBytesPerChunk) || tags.chunkUsed)
- {
- T(YAFFS_TRACE_NANDACCESS,(TSTR("Chunk %d not erased" TENDSTR),chunkInNAND));
- retval = YAFFS_FAIL;
- }
-
- yaffs_ReleaseTempBuffer(dev,data,__LINE__);
+ 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));
+
- return retval;
+ if(parentCheck && obj->parent &&
+ oh->parentObjectId != obj->parent->objectId &&
+ (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
+ obj->parent->objectId != YAFFS_OBJECTID_DELETED))
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
+ tags->objectId, oh->parentObjectId, obj->parent->objectId));
+
+ if(tags->objectId > 1 && oh->name[0] == 0) /* Null name */
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header name is NULL"TENDSTR),
+ obj->objectId));
+
+ if(tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header name is 0xFF"TENDSTR),
+ obj->objectId));
}
-#if 1
-static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, const __u8 *data, yaffs_ExtendedTags *tags,int useReserve)
+static int yaffs_VerifyTnodeWorker(yaffs_Object * obj, yaffs_Tnode * tn,
+ __u32 level, int chunkOffset)
{
- int chunk;
-
- int writeOk = 1;
- int attempts = 0;
-
+ int i;
+ yaffs_Device *dev = obj->myDev;
+ int ok = 1;
-
- do{
- chunk = yaffs_AllocateChunk(dev,useReserve);
-
- if(chunk >= 0)
- {
+ if (tn) {
+ if (level > 0) {
- // First check this chunk is erased...
-#ifndef CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
- writeOk = yaffs_CheckChunkErased(dev,chunk);
-#endif
- if(!writeOk)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs chunk %d was not erased" TENDSTR),chunk));
- }
- else
- {
- writeOk = yaffs_WriteChunkWithTagsToNAND(dev,chunk,data,tags);
- }
- attempts++;
-
- if(writeOk)
- {
- // Copy the data into the robustification buffer.
- // NB We do this at the end to prevent duplicates in the case of a write error.
- //Todo
- yaffs_HandleWriteChunkOk(dev,chunk,data,tags);
+ 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
- {
- yaffs_HandleWriteChunkError(dev,chunk);
+ } else if (level == 0) {
+ yaffs_ExtendedTags tags;
+ __u32 objectId = obj->objectId;
+
+ chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
+
+ for(i = 0; i < YAFFS_NTNODES_LEVEL0; i++){
+ __u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
+
+ if(theChunk > 0){
+ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
+ yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags);
+ if(tags.objectId != objectId || tags.chunkId != chunkOffset){
+ T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
+ objectId, chunkOffset, theChunk,
+ tags.objectId, tags.chunkId));
+ }
+ }
+ chunkOffset++;
}
}
-
- } while(chunk >= 0 && ! writeOk);
-
- if(attempts > 1)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs write required %d attempts" TENDSTR),attempts));
- dev->nRetriedWrites+= (attempts - 1);
}
-
-
- return chunk;
-}
-#endif
+ return ok;
+}
-///
-// Functions for robustisizing
-//
-//
-static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND)
+static void yaffs_VerifyFile(yaffs_Object *obj)
{
+ int requiredTallness;
+ int actualTallness;
+ __u32 lastChunk;
+ __u32 x;
+ __u32 i;
+ yaffs_Device *dev;
+ yaffs_ExtendedTags tags;
+ yaffs_Tnode *tn;
+ __u32 objectId;
- yaffs_MarkBlockBad(dev,blockInNAND);
-
- yaffs_GetBlockInfo(dev,blockInNAND)->blockState = YAFFS_BLOCK_STATE_DEAD;
+ if(!obj)
+ return;
+
+ if(yaffs_SkipVerification(obj->myDev))
+ return;
+
+ dev = obj->myDev;
+ objectId = obj->objectId;
+
+ /* Check file size is consistent with tnode depth */
+ lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
+ x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
+ requiredTallness = 0;
+ while (x> 0) {
+ x >>= YAFFS_TNODES_INTERNAL_BITS;
+ requiredTallness++;
+ }
+
+ actualTallness = obj->variant.fileVariant.topLevel;
+
+ 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));
+ }
+ }
+ }
+
+ }
- dev->nRetiredBlocks++;
}
+static void yaffs_VerifyHardLink(yaffs_Object *obj)
+{
+ if(obj && yaffs_SkipVerification(obj->myDev))
+ return;
+
+ /* Verify sane equivalent object */
+}
-static int yaffs_RewriteBufferedBlock(yaffs_Device *dev)
+static void yaffs_VerifySymlink(yaffs_Object *obj)
{
- dev->doingBufferedBlockRewrite = 1;
- //
- // Remove erased chunks
- // Rewrite existing chunks to a new block
- // Set current write block to the new block
-
- dev->doingBufferedBlockRewrite = 0;
-
- return 1;
+ 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_HandleReadDataError(yaffs_Device *dev,int chunkInNAND)
+static void yaffs_VerifyObject(yaffs_Object *obj)
{
- int blockInNAND = chunkInNAND/dev->nChunksPerBlock;
+ 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 = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
+ chunkIsLive = chunkIdOk &&
+ yaffs_CheckChunkBit(dev,
+ obj->hdrChunk / dev->nChunksPerBlock,
+ obj->hdrChunk % dev->nChunksPerBlock);
+ if(!obj->fake &&
+ (!chunkIdOk || !chunkIsLive)) {
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
+ obj->objectId,obj->hdrChunk,
+ 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;
- // Mark the block for retirement
- yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>>Block %d marked for retirement" TENDSTR),blockInNAND));
+ yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk,buffer, &tags);
+ yaffs_VerifyObjectHeader(obj,oh,&tags,1);
+
+ yaffs_ReleaseTempBuffer(dev,buffer,__LINE__);
+ }
+
+ /* Verify it has a parent */
+ if(obj && !obj->fake &&
+ (!obj->parent || obj->parent->myDev != dev)){
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
+ obj->objectId,obj->parent));
+ }
+
+ /* Verify parent is a directory */
+ if(obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY){
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
+ obj->objectId,obj->parent->variantType));
+ }
+
+ switch(obj->variantType){
+ case YAFFS_OBJECT_TYPE_FILE:
+ yaffs_VerifyFile(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ yaffs_VerifySymlink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ yaffs_VerifyDirectory(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ yaffs_VerifyHardLink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ yaffs_VerifySpecial(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ default:
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d has illegaltype %d"TENDSTR),
+ obj->objectId,obj->variantType));
+ break;
+ }
+
+
+}
+
+static void yaffs_VerifyObjects(yaffs_Device *dev)
+{
+ yaffs_Object *obj;
+ int i;
+ struct ylist_head *lh;
+
+ if(yaffs_SkipVerification(dev))
+ return;
+
+ /* Iterate through the objects in each hash entry */
+
+ for(i = 0; i < YAFFS_NOBJECT_BUCKETS; i++){
+ ylist_for_each(lh, &dev->objectBucket[i].list) {
+ if (lh) {
+ obj = ylist_entry(lh, yaffs_Object, hashLink);
+ yaffs_VerifyObject(obj);
+ }
+ }
+ }
- //TODO
- // Just do a garbage collection on the affected block then retire the block
- // NB recursion
}
-static void yaffs_CheckWrittenBlock(yaffs_Device *dev,int chunkInNAND)
+/*
+ * 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.
+ * Note that root might have a presence in NAND if permissions are set.
+ */
+
+yaffs_Object *yaffs_Root(yaffs_Device * dev)
{
+ return dev->rootDir;
}
-static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *tags)
+yaffs_Object *yaffs_LostNFound(yaffs_Device * dev)
{
+ return dev->lostNFoundDir;
}
-static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaffs_ExtendedTags *tags)
+
+/*
+ * 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 void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND)
+static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
+ int chunkInNAND)
{
- int blockInNAND = chunkInNAND/dev->nChunksPerBlock;
- // Mark the block for retirement
- yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
- // Delete the chunk
- yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__);
+ 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);
-#if 0
-static int yaffs_VerifyCompare(const __u8 *d0, const __u8 * d1, const yaffs_Spare *s0, const yaffs_Spare *s1,int dataSize)
-{
-
-
- if( memcmp(d0,d1,dataSize) != 0 ||
- s0->tagByte0 != s1->tagByte0 ||
- s0->tagByte1 != s1->tagByte1 ||
- s0->tagByte2 != s1->tagByte2 ||
- s0->tagByte3 != s1->tagByte3 ||
- s0->tagByte4 != s1->tagByte4 ||
- s0->tagByte5 != s1->tagByte5 ||
- s0->tagByte6 != s1->tagByte6 ||
- s0->tagByte7 != s1->tagByte7 ||
- s0->ecc1[0] != s1->ecc1[0] ||
- s0->ecc1[1] != s1->ecc1[1] ||
- s0->ecc1[2] != s1->ecc1[2] ||
- s0->ecc2[0] != s1->ecc2[0] ||
- s0->ecc2[1] != s1->ecc2[1] ||
- s0->ecc2[2] != s1->ecc2[2] )
- {
- return 0;
+ do {
+ yaffs_BlockInfo *bi = 0;
+ int erasedOk = 0;
+
+ chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
+ if (chunk < 0) {
+ /* no space */
+ break;
+ }
+
+ /* First check this chunk is erased, if it needs
+ * checking. The checking policy (unless forced
+ * always on) is as follows:
+ *
+ * Check the first page we try to write in a block.
+ * If the check passes then we don't need to check any
+ * more. If the check fails, we check again...
+ * If the block has been erased, we don't need to check.
+ *
+ * However, if the block has been prioritised for gc,
+ * then we think there might be something odd about
+ * this block and stop using it.
+ *
+ * Rationale: We should only ever see chunks that have
+ * not been erased if there was a partially written
+ * chunk due to power loss. This checking policy should
+ * catch that case with very few checks and thus save a
+ * lot of checks that are most likely not needed.
+ */
+ if (bi->gcPrioritise) {
+ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+ /* try another chunk */
+ continue;
+ }
+
+ /* let's give it a try */
+ attempts++;
+
+#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
+ bi->skipErasedCheck = 0;
+#endif
+ if (!bi->skipErasedCheck) {
+ erasedOk = yaffs_CheckChunkErased(dev, chunk);
+ if (erasedOk != YAFFS_OK) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR ("**>> yaffs chunk %d was not erased"
+ TENDSTR), chunk));
+
+ /* try another chunk */
+ continue;
+ }
+ bi->skipErasedCheck = 1;
+ }
+
+ writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
+ data, tags);
+ if (writeOk != YAFFS_OK) {
+ yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
+ /* try another chunk */
+ continue;
}
+
+ /* Copy the data into the robustification buffer */
+ yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
+
+ } while (writeOk != YAFFS_OK &&
+ (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
- return 1;
+ if(!writeOk)
+ chunk = -1;
+
+ if (attempts > 1) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("**>> yaffs write required %d attempts" TENDSTR),
+ attempts));
+
+ dev->nRetriedWrites += (attempts - 1);
+ }
+
+ return chunk;
+}
+
+/*
+ * Block retiring for handling a broken block.
+ */
+
+static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND)
+{
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
+
+ yaffs_InvalidateCheckpoint(dev);
+
+ 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)
+{
}
-#endif
+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)));
+
+ }
+
+ }
+}
-///////////////////////// Object management //////////////////
-// List of spare objects
-// The list is hooked together using the first pointer
-// in the object
+static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk)
+{
-// static yaffs_Object *yaffs_freeObjects = NULL;
+ int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
-// static int yaffs_nFreeObjects;
+ 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));
-// static yaffs_ObjectList *yaffs_allocatedObjectList = NULL;
+
+ }
+
+ /* Delete the chunk */
+ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
+}
-// static yaffs_ObjectBucket yaffs_objectBucket[YAFFS_NOBJECT_BUCKETS];
+/*---------------- Name handling functions ------------*/
-static __u16 yaffs_CalcNameSum(const YCHAR *name)
+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))
- {
+
+ const YUCHAR *bname = (const YUCHAR *) name;
+ if (bname) {
+ while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
sum += yaffs_toupper(*bname) * i;
bname++;
}
}
+
return sum;
}
-void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
+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');
- }
+ memset(obj->shortName,0,sizeof (YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
+ if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH) {
+ yaffs_strcpy(obj->shortName, name);
+ } else {
+ obj->shortName[0] = _Y('\0');
+ }
#endif
- obj->sum = yaffs_CalcNameSum(name);
+ obj->sum = yaffs_CalcNameSum(name);
}
-#if 0
-void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
-{
- yaffs_ECCCalculate(data , spare->ecc1);
- yaffs_ECCCalculate(&data[256] , spare->ecc2);
-}
-#endif
-
-
-///////////////////////// TNODES ///////////////////////
-
-// List of spare tnodes
-// The list is hooked together using the first pointer
-// in the tnode.
-
-//static yaffs_Tnode *yaffs_freeTnodes = NULL;
+/*-------------------- TNODES -------------------
-// static int yaffs_nFreeTnodes;
+ * 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 yaffs_TnodeList *yaffs_allocatedTnodeList = NULL;
+static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes)
+{
+ int i;
+ int tnodeSize;
+ yaffs_Tnode *newTnodes;
+ __u8 *mem;
+ yaffs_Tnode *curr;
+ yaffs_Tnode *next;
+ yaffs_TnodeList *tnl;
+
+ if (nTnodes < 1)
+ return YAFFS_OK;
+
+ /* Calculate the tnode size in bytes for variable width tnode support.
+ * Must be a multiple of 32-bits */
+ tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+ if(tnodeSize < sizeof(yaffs_Tnode))
+ tnodeSize = sizeof(yaffs_Tnode);
+
+ /* make these things */
-// yaffs_CreateTnodes creates a bunch more tnodes and
-// adds them to the tnode free list.
-// Don't use this function directly
+ newTnodes = YMALLOC(nTnodes * tnodeSize);
+ mem = (__u8 *)newTnodes;
-static int yaffs_CreateTnodes(yaffs_Device *dev,int nTnodes)
-{
- int i;
- yaffs_Tnode *newTnodes;
- yaffs_TnodeList *tnl;
-
- if(nTnodes < 1) return YAFFS_OK;
-
- // make these things
-
- newTnodes = YMALLOC(nTnodes * sizeof(yaffs_Tnode));
-
- if (!newTnodes)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("yaffs: Could not allocate Tnodes"TENDSTR)));
+ if (!newTnodes) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
return YAFFS_FAIL;
- }
-
- // Hook them into the free list
- for(i = 0; i < nTnodes - 1; i++)
- {
- newTnodes[i].internal[0] = &newTnodes[i+1];
+ }
+
+ /* 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] = 1;
+ 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] = 1;
+ newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
#endif
dev->freeTnodes = newTnodes;
- dev->nFreeTnodes+= nTnodes;
+#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.
+ /* 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)));
-
- }
- else
- {
+ 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)));
-
+ 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 */
-// GetTnode gets us a clean tnode. Tries to make allocate more if we run out
-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
+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 there are none left make more */
+ if (!dev->freeTnodes) {
+ yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
}
-
- if(dev->freeTnodes)
- {
+
+ if (dev->freeTnodes) {
tn = dev->freeTnodes;
#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- if(tn->internal[YAFFS_NTNODES_INTERNAL] != 1)
- {
- // Hoosterman, this thing looks like it isn't in the list
- T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Tnode list bug 1" TENDSTR)));
+ 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--;
- // zero out
- memset(tn,0,sizeof(yaffs_Tnode));
}
-
+
+ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
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)
+static yaffs_Tnode *yaffs_GetTnode(yaffs_Device * dev)
{
+ yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
+ int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+
+ if(tnodeSize < sizeof(yaffs_Tnode))
+ tnodeSize = sizeof(yaffs_Tnode);
+
if(tn)
- {
+ memset(tn, 0, tnodeSize);
+
+ return tn;
+}
+
+/* FreeTnode frees up a tnode and puts it back on the free list */
+static void yaffs_FreeTnode(yaffs_Device * dev, yaffs_Tnode * tn)
+{
+ if (tn) {
#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- if(tn->internal[YAFFS_NTNODES_INTERNAL] != 0)
- {
- // Hoosterman, this thing looks like it is already in the list
- T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Tnode list bug 2" TENDSTR)));
+ 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] = 1;
+ tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
#endif
tn->internal[0] = dev->freeTnodes;
dev->freeTnodes = tn;
dev->nFreeTnodes++;
}
+ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+
}
-
-static void yaffs_DeinitialiseTnodes(yaffs_Device*dev)
+static void yaffs_DeinitialiseTnodes(yaffs_Device * dev)
{
- // Free the list of allocated tnodes
+ /* Free the list of allocated tnodes */
yaffs_TnodeList *tmp;
-
- while(dev->allocatedTnodeList)
- {
- tmp = dev->allocatedTnodeList->next;
+
+ while (dev->allocatedTnodeList) {
+ tmp = dev->allocatedTnodeList->next;
YFREE(dev->allocatedTnodeList->tnodes);
YFREE(dev->allocatedTnodeList);
- dev->allocatedTnodeList = tmp;
-
+ dev->allocatedTnodeList = tmp;
+
}
-
+
dev->freeTnodes = NULL;
dev->nFreeTnodes = 0;
}
-static void yaffs_InitialiseTnodes(yaffs_Device*dev)
+static void yaffs_InitialiseTnodes(yaffs_Device * dev)
{
dev->allocatedTnodeList = NULL;
dev->freeTnodes = NULL;
}
-#if 0
-void yaffs_TnodeTest(yaffs_Device *dev)
-{
- int i;
- int j;
- yaffs_Tnode *tn[1000];
-
- YINFO("Testing TNodes");
-
- for(j = 0; j < 50; j++)
- {
- for(i = 0; i < 1000; i++)
- {
- tn[i] = yaffs_GetTnode(dev);
- if(!tn[i])
- {
- YALERT("Getting tnode failed");
- }
- }
- for(i = 0; i < 1000; i+=3)
- {
- yaffs_FreeTnode(dev,tn[i]);
- tn[i] = NULL;
- }
-
- }
+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;
}
-#endif
-
-
-////////////////// END OF 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.
+/* ------------------- 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.
-// Used when reading.....
-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,yaffs_FileStructure *fStruct, __u32 chunkId)
+/* 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 requiredTallness;
int level = fStruct->topLevel;
-
- // Check sane level and chunk Id
- if(level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
- {
-// char str[50];
-// sprintf(str,"Bad level %d",level);
-// YALERT(str);
+
+ /* Check sane level and chunk Id */
+ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) {
return NULL;
}
-
- if(chunkId > YAFFS_MAX_CHUNK_ID)
- {
-// char str[50];
-// sprintf(str,"Bad chunkId %d",chunkId);
-// YALERT(str);
+
+ if (chunkId > YAFFS_MAX_CHUNK_ID) {
return NULL;
}
- // First check we're tall enough (ie enough topLevel)
-
- i = chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS);
+ /* First check we're tall enough (ie enough topLevel) */
+
+ i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
requiredTallness = 0;
- while(i)
- {
+ while (i) {
i >>= YAFFS_TNODES_INTERNAL_BITS;
requiredTallness++;
}
-
-
- if(requiredTallness > fStruct->topLevel)
- {
- // Not tall enough, so we can't find it, return NULL.
+
+ 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 >>(/* dev->chunkGroupBits + */ YAFFS_TNODES_LEVEL0_BITS + (level-1) * YAFFS_TNODES_INTERNAL_BITS)) &
- YAFFS_TNODES_INTERNAL_MASK];
+
+ /* 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;
+
+ 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.
-//
-static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev, yaffs_FileStructure *fStruct, __u32 chunkId)
+/* 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)
{
-
- yaffs_Tnode *tn;
-
+
int requiredTallness;
int i;
int l;
-
+ yaffs_Tnode *tn;
+
__u32 x;
-
-
- //T((TSTR("AddOrFind topLevel=%d, chunk=%d"),fStruct->topLevel,chunkId));
-
- // Check sane level and page Id
- if(fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
- {
-// char str[50];
-// sprintf(str,"Bad level %d",fStruct->topLevel);
-// YALERT(str);
+
+
+ /* Check sane level and page Id */
+ if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL) {
return NULL;
}
-
- if(chunkId > YAFFS_MAX_CHUNK_ID)
- {
-// char str[50];
-// sprintf(str,"Bad chunkId %d",chunkId);
-// YALERT(str);
+
+ if (chunkId > YAFFS_MAX_CHUNK_ID) {
return NULL;
}
-
- // First check we're tall enough (ie enough topLevel)
-
- x = chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS);
+
+ /* First check we're tall enough (ie enough topLevel) */
+
+ x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
requiredTallness = 0;
- while(x)
- {
+ while (x) {
x >>= YAFFS_TNODES_INTERNAL_BITS;
requiredTallness++;
}
-
- //T((TSTR(" required=%d"),requiredTallness));
-
-
- if(requiredTallness > fStruct->topLevel)
- {
- // Not tall enough,gotta make the tree taller
- for(i = fStruct->topLevel; i < requiredTallness; i++)
- {
- //T((TSTR(" add new top")));
-
+
+
+ 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)
- {
+
+ if (tn) {
tn->internal[0] = fStruct->top;
fStruct->top = tn;
- }
- else
- {
- T(YAFFS_TRACE_ERROR,(TSTR("yaffs: no more tnodes" TENDSTR)));
+ } else {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("yaffs: no more tnodes" TENDSTR)));
}
}
-
+
fStruct->topLevel = requiredTallness;
}
-
-
- // Traverse down to level 0, adding anything we need
-
+
+ /* Traverse down to level 0, adding anything we need */
+
l = fStruct->topLevel;
tn = fStruct->top;
- while (l > 0 && tn)
- {
- x = (chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS + (l-1) * YAFFS_TNODES_INTERNAL_BITS)) &
- YAFFS_TNODES_INTERNAL_MASK;
-
- //T((TSTR(" [%d:%d]"),l,i));
-
- if(!tn->internal[x])
- {
- //T((TSTR(" added")));
-
- tn->internal[x] = yaffs_GetTnode(dev);
- }
-
- tn = tn->internal[x];
- l--;
+ 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);
+ }
}
-
- //TSTR(TENDSTR)));
-
- return tn;
-}
+ return tn;
+}
-int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk, yaffs_ExtendedTags *tags, int objectId, int chunkInInode)
+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;
+
+ 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)
+/* 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;
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)
- {
+
+ 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);
}
- 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;
+ if (allDone) {
+ yaffs_FreeTnode(dev,
+ tn->
+ internal[i]);
+ tn->internal[i] = NULL;
}
- }
-
+ }
+
}
return (allDone) ? 1 : 0;
- }
- else if(level == 0)
- {
+ } else if (level == 0) {
int hitLimit = 0;
-
- for(i = YAFFS_NTNODES_LEVEL0 -1; i >= 0 && !hitLimit; i--)
- {
- if(tn->level0[i])
- {
-
- chunkInInode = (chunkOffset << YAFFS_TNODES_LEVEL0_BITS ) + i;
-
- theChunk = tn->level0[i] << dev->chunkGroupBits;
-
- foundChunk = yaffs_FindChunkInGroup(dev,theChunk,&tags,in->objectId,chunkInInode);
-
- if(foundChunk > 0)
- {
- yaffs_DeleteChunk(dev,foundChunk,1,__LINE__);
+
+ 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)
- {
+ if (limit) {
+ *limit = *limit - 1;
+ if (*limit <= 0) {
hitLimit = 1;
}
}
-
+
}
-
- tn->level0[i] = 0;
- }
-
+
+ yaffs_PutLevel0Tnode(dev,tn,i,0);
+ }
+
}
return (i < 0) ? 1 : 0;
-
}
-
+
}
-
+
return 1;
-
-}
+}
-static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
+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)
- {
+ 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)
+/* 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;
+
+ 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? */
}
- else
- {
- //Hoosterman... how could this happen.
- }
- }
+ }
}
return (allDone) ? 1 : 0;
- }
- else if(level == 0)
- {
-
- for(i = YAFFS_NTNODES_LEVEL0 -1; i >=0; i--)
- {
- if(tn->level0[i])
- {
- // Note this does not find the real chunk, only the chunk group.
- // We make an assumption that a chunk group is niot larger than a block.
- theChunk = (tn->level0[i] << dev->chunkGroupBits);
-
- yaffs_SoftDeleteChunk(dev,theChunk);
- tn->level0[i] = 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;
-
-}
+ return 1;
+}
-static void yaffs_SoftDeleteFile(yaffs_Object *obj)
+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);
+ 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.
+ */
-
-
-
-// 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.
-
-// yaffs_PruneWorker should only be called by yaffs_PruneFileStructure()
-
-static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn, __u32 level, int del0)
+static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device * dev, yaffs_Tnode * tn,
+ __u32 level, int del0)
{
int i;
int hasData;
-
- if(tn)
- {
+
+ 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++;
+
+ 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);
+
+ 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)
+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)
- {
+
+ 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++;
+ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
+ if (tn->internal[i]) {
+ hasData++;
}
}
-
- if(!hasData)
- {
+
+ if (!hasData) {
fStruct->top = tn->internal[0];
fStruct->topLevel--;
- yaffs_FreeTnode(dev,tn);
- }
- else
- {
+ 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));
-/////////////////////// 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));
-
- if (!newObjects)
- {
- T(YAFFS_TRACE_ALLOCATE,(TSTR("yaffs: Could not allocate more objects" TENDSTR)));
+ 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 = YMALLOC(sizeof(yaffs_ObjectList));
- if(!list)
- {
- T(YAFFS_TRACE_ALLOCATE,(TSTR("Could not add objects to management list" TENDSTR)));
- }
- else
- {
- list->objects = newObjects;
- list->next = dev->allocatedObjectList;
- dev->allocatedObjectList = list;
}
-
-
+ /* Hook them into the free list */
+ for (i = 0; i < nObjects - 1; i++) {
+ newObjects[i].siblings.next =
+ (struct ylist_head *)(&newObjects[i + 1]);
+ }
+
+ newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
+ dev->freeObjects = newObjects;
+ dev->nFreeObjects += nObjects;
+ dev->nObjectsCreated += nObjects;
+
+ /* Now add this bunch of Objects to a list for freeing up. */
+
+ list->objects = newObjects;
+ list->next = dev->allocatedObjectList;
+ dev->allocatedObjectList = list;
+
return YAFFS_OK;
}
-// AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out
-static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
+/* 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);
+
+#ifdef VALGRIND_TEST
+ tn = YMALLOC(sizeof(yaffs_Object));
+#else
+ /* If there are none left make more */
+ if (!dev->freeObjects) {
+ yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
}
-
- if(dev->freeObjects)
- {
+
+ if (dev->freeObjects) {
tn = dev->freeObjects;
- dev->freeObjects = (yaffs_Object *)(dev->freeObjects->siblings.next);
+ dev->freeObjects =
+ (yaffs_Object *) (dev->freeObjects->siblings.next);
dev->nFreeObjects--;
-
- // Now sweeten it up...
-
- memset(tn,0,sizeof(yaffs_Object));
+ }
+#endif
+ if(tn){
+ /* Now sweeten it up... */
+
+ memset(tn, 0, sizeof(yaffs_Object));
tn->myDev = dev;
- tn->chunkId = -1;
+ tn->hdrChunk = 0;
tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
- INIT_LIST_HEAD(&(tn->hardLinks));
- INIT_LIST_HEAD(&(tn->hashLink));
- INIT_LIST_HEAD(&tn->siblings);
+ YINIT_LIST_HEAD(&(tn->hardLinks));
+ YINIT_LIST_HEAD(&(tn->hashLink));
+ YINIT_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);
+
+ /* Now make the directory sane */
+ if(dev->rootDir){
+ tn->parent = dev->rootDir;
+ ylist_add(&(tn->siblings),&dev->rootDir->variant.directoryVariant.children);
+ }
+
+ /* Add it to the lost and found directory.
+ * NB Can't put root or lostNFound in lostNFound so
+ * check if lostNFound exists first
+ */
+ if (dev->lostNFoundDir) {
+ yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
}
}
+ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
return tn;
}
-static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev,int number,__u32 mode)
+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
+ yaffs_Object *obj =
+ yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
+ if (obj) {
+ obj->fake = 1; /* it is fake so it might have no NAND presence... */
+ obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
+ obj->unlinkAllowed = 0; /* ... or unlink it */
obj->deleted = 0;
obj->unlinked = 0;
- obj->st_mode = mode;
+ obj->yst_mode = mode;
obj->myDev = dev;
- obj->chunkId = 0; // Not a valid chunk.
+ obj->hdrChunk = 0; /* Not a valid chunk. */
}
-
+
return obj;
-
-}
+}
-static void yaffs_UnhashObject(yaffs_Object *tn)
+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--;
- }
-
-}
+ yaffs_Device *dev = tn->myDev;
+
+ /* If it is still linked into the bucket list, free from the list */
+ if (!ylist_empty(&tn->hashLink)) {
+ ylist_del_init(&tn->hashLink);
+ bucket = yaffs_HashFunction(tn->objectId);
+ dev->objectBucket[bucket].count--;
+ }
+}
-// FreeObject frees up a Object and puts it back on the free list
-static void yaffs_FreeObject(yaffs_Object *tn)
+/* 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;
+
+ if(tn->parent)
+ YBUG();
+ if(!ylist_empty(&tn->siblings))
+ YBUG();
+
+
#ifdef __KERNEL__
- if(tn->myInode)
- {
- // We're still hooked up to a cached inode.
- // Don't delete now, but mark for later deletion
+ 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++;
-}
+ yaffs_UnhashObject(tn);
+#ifdef VALGRIND_TEST
+ YFREE(tn);
+#else
+ /* Link into the free list. */
+ tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
+ dev->freeObjects = tn;
+ dev->nFreeObjects++;
+#endif
+ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+
+}
#ifdef __KERNEL__
-void yaffs_HandleDeferedFree(yaffs_Object *obj)
+void yaffs_HandleDeferedFree(yaffs_Object * obj)
{
- if(obj->deferedFree)
- {
- yaffs_FreeObject(obj);
+ if (obj->deferedFree) {
+ yaffs_FreeObject(obj);
}
}
#endif
-
-
-static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
+static void yaffs_DeinitialiseObjects(yaffs_Device * dev)
{
- // Free the list of allocated Objects
-
+ /* Free the list of allocated Objects */
+
yaffs_ObjectList *tmp;
-
- while( dev->allocatedObjectList)
- {
- tmp = dev->allocatedObjectList->next;
+
+ while (dev->allocatedObjectList) {
+ tmp = dev->allocatedObjectList->next;
YFREE(dev->allocatedObjectList->objects);
YFREE(dev->allocatedObjectList);
-
- dev->allocatedObjectList = tmp;
+
+ dev->allocatedObjectList = tmp;
}
-
+
dev->freeObjects = NULL;
dev->nFreeObjects = 0;
}
-static void yaffs_InitialiseObjects(yaffs_Device *dev)
+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;
- }
-
-}
-
-
-
+ dev->nFreeObjects = 0;
+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+ YINIT_LIST_HEAD(&dev->objectBucket[i].list);
+ dev->objectBucket[i].count = 0;
+ }
+}
-int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
+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++)
- {
+ /* 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)
- {
+ 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++)
- {
+
+ /* 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)
- {
+ 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)
+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;
- }
+ /* Now find an object value that has not already been taken
+ * by scanning the list.
+ */
+
+ int found = 0;
+ struct ylist_head *i;
+
+ __u32 n = (__u32) bucket;
+
+ /* yaffs_CheckObjectHashSanity(); */
+
+ while (!found) {
+ found = 1;
+ n += YAFFS_NOBJECT_BUCKETS;
+ if (1 || dev->objectBucket[bucket].count > 0) {
+ ylist_for_each(i, &dev->objectBucket[bucket].list) {
+ /* If there is already one in the list */
+ if (i
+ && ylist_entry(i, yaffs_Object,
+ hashLink)->objectId == n) {
+ found = 0;
+ }
}
}
}
-
- //T(("bucket %d count %d inode %d\n",bucket,yaffs_objectBucket[bucket].count,n);
-
- return n;
+
+
+ return n;
}
-void yaffs_HashObject(yaffs_Object *in)
+static void yaffs_HashObject(yaffs_Object * in)
{
- int bucket = yaffs_HashFunction(in->objectId);
- yaffs_Device *dev = in->myDev;
-
- if(!list_empty(&in->hashLink))
- {
- //YINFO("!!!");
- }
+ int bucket = yaffs_HashFunction(in->objectId);
+ yaffs_Device *dev = in->myDev;
-
- list_add(&in->hashLink,&dev->objectBucket[bucket].list);
- dev->objectBucket[bucket].count++;
+ ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
+ dev->objectBucket[bucket].count++;
}
-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev,__u32 number)
+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)
- {
+ int bucket = yaffs_HashFunction(number);
+ struct ylist_head *i;
+ yaffs_Object *in;
+
+ ylist_for_each(i, &dev->objectBucket[bucket].list) {
+ /* Look if it is in the list */
+ if (i) {
+ in = ylist_entry(i, yaffs_Object, hashLink);
+ if (in->objectId == number) {
+#ifdef __KERNEL__
+ /* Don't tell the VFS about this one if it is defered free */
+ if (in->deferedFree)
+ return NULL;
+#endif
+
return in;
}
}
}
-
+
return NULL;
}
-
-
-yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev,int number,yaffs_ObjectType type)
+yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number,
+ yaffs_ObjectType type)
{
-
+
yaffs_Object *theObject;
+ yaffs_Tnode *tn = NULL;
- if(number < 0)
- {
+ 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)
- {
+
+ if (theObject) {
theObject->fake = 0;
theObject->renameAllowed = 1;
theObject->unlinkAllowed = 1;
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];
+ 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->st_atime = theObject->st_mtime = theObject->st_ctime = Y_CURRENT_TIME;
+ theObject->yst_atime = theObject->yst_mtime =
+ theObject->yst_ctime = Y_CURRENT_TIME;
+#endif
+
+#if 0
+ theObject->sum_prev = 12345;
+ theObject->sum_trailer = 6789;
#endif
- switch(type)
- {
- case YAFFS_OBJECT_TYPE_FILE:
- theObject->variant.fileVariant.fileSize = 0;
- theObject->variant.fileVariant.scannedFileSize = 0;
- theObject->variant.fileVariant.topLevel = 0;
- theObject->variant.fileVariant.top = yaffs_GetTnode(dev);
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- INIT_LIST_HEAD(&theObject->variant.directoryVariant.children);
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- // No action required
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- // No action required
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- // No action required
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- // todo this should not happen
- break;
+
+ switch (type) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ theObject->variant.fileVariant.fileSize = 0;
+ theObject->variant.fileVariant.scannedFileSize = 0;
+ theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
+ theObject->variant.fileVariant.topLevel = 0;
+ theObject->variant.fileVariant.top = tn;
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
+ children);
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ /* No action required */
+ break;
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ /* todo this should not happen */
+ break;
}
}
-
+
return theObject;
}
-yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev, int number,yaffs_ObjectType type)
+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 (number > 0) {
+ theObject = yaffs_FindObjectByNumber(dev, number);
}
-
- if(!theObject)
- {
- theObject = yaffs_CreateNewObject(dev,number,type);
+
+ if (!theObject) {
+ theObject = yaffs_CreateNewObject(dev, number, type);
}
-
+
return theObject;
}
+
-YCHAR *yaffs_CloneString(const YCHAR *str)
+static YCHAR *yaffs_CloneString(const YCHAR * str)
{
YCHAR *newStr = NULL;
-
- if(str && *str)
- {
+
+ if (str && *str) {
newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
- yaffs_strcpy(newStr,str);
+ 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)
-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)
+/*
+ * Mknod (create) a new object.
+ * equivalentObject only has meaning for a hard link;
+ * aliasString only has meaning for a sumlink.
+ * rdev only has meaning for devices (a subset of special objects)
+ */
+
+static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
+ yaffs_Object * parent,
+ const YCHAR * name,
+ __u32 mode,
+ __u32 uid,
+ __u32 gid,
+ yaffs_Object * equivalentObject,
+ const YCHAR * aliasString, __u32 rdev)
{
yaffs_Object *in;
+ YCHAR *str = NULL;
yaffs_Device *dev = parent->myDev;
-
- // Check if the entry exists. If it does then fail the call since we don't want a dup.
- if(yaffs_FindObjectByName(parent,name))
- {
+
+ /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
+ if (yaffs_FindObjectByName(parent, name)) {
return NULL;
}
+
+ in = yaffs_CreateNewObject(dev, -1, type);
+
+ if(!in)
+ return YAFFS_FAIL;
+
+ if(type == YAFFS_OBJECT_TYPE_SYMLINK){
+ str = yaffs_CloneString(aliasString);
+ if(!str){
+ yaffs_FreeObject(in);
+ return NULL;
+ }
+ }
- in = yaffs_CreateNewObject(dev,-1,type);
- if(in)
- {
- in->chunkId = -1;
+
+ if (in) {
+ in->hdrChunk = 0;
in->valid = 1;
in->variantType = type;
- in->st_mode = mode;
-
+ 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->st_atime = in->st_mtime = in->st_ctime = Y_CURRENT_TIME;
+ in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
- in->st_rdev = rdev;
- in->st_uid = uid;
- in->st_gid = gid;
-#endif
+ in->yst_rdev = rdev;
+ in->yst_uid = uid;
+ in->yst_gid = gid;
+#endif
in->nDataChunks = 0;
- yaffs_SetObjectName(in,name);
+ yaffs_SetObjectName(in, name);
in->dirty = 1;
-
- yaffs_AddObjectToDirectory(parent,in);
-
+
+ yaffs_AddObjectToDirectory(parent, in);
+
in->myDev = parent->myDev;
-
-
- switch(type)
- {
- case YAFFS_OBJECT_TYPE_SYMLINK:
- in->variant.symLinkVariant.alias = yaffs_CloneString(aliasString);
- 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: // do nothing
- case YAFFS_OBJECT_TYPE_DIRECTORY: // do nothing
- case YAFFS_OBJECT_TYPE_SPECIAL: // do nothing
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- break;
+
+ switch (type) {
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ in->variant.symLinkVariant.alias = str;
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ in->variant.hardLinkVariant.equivalentObject =
+ equivalentObject;
+ in->variant.hardLinkVariant.equivalentObjectId =
+ equivalentObject->objectId;
+ ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
+ break;
+ case YAFFS_OBJECT_TYPE_FILE:
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ /* do nothing */
+ break;
}
- if(/*yaffs_GetNumberOfFreeChunks(dev) <= 0 || */
- yaffs_UpdateObjectHeader(in,name,0,0) < 0)
- {
- // Could not create the object header, fail the creation
+ 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)
+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);
+ 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)
+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);
+ 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)
+yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name,
+ __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY,parent,name,mode,uid,gid,NULL,NULL,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)
+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);
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
+ uid, gid, NULL, alias, 0);
}
-// NB yaffs_Link returns the object id of the equivalent object.
-yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name, yaffs_Object *equivalentObject)
+/* 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
+ /* 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))
- {
+
+ if (yaffs_MknodObject
+ (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
+ equivalentObject, NULL, 0)) {
return equivalentObject;
- }
- else
- {
+ } else {
return NULL;
}
-
-}
+}
-static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir, const YCHAR *newName,int force)
+static int yaffs_ChangeObjectName(yaffs_Object * obj, yaffs_Object * newDir,
+ const YCHAR * newName, int force, int shadows)
{
int unlinkOp;
int deleteOp;
- if(newDir == NULL)
- {
- newDir = obj->parent; // use the old directory
+ yaffs_Object *existingTarget;
+
+ if (newDir == NULL) {
+ newDir = obj->parent; /* use the old directory */
}
- // TODO: Do we need this different handling for YAFFS2 and YAFFS1??
- if(obj->myDev->isYaffs2)
- {
- unlinkOp = (newDir == obj->myDev->unlinkedDir);
+ if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+ ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
+ TENDSTR)));
+ YBUG();
}
- else
- {
- unlinkOp = (newDir == obj->myDev->unlinkedDir && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
+
+ /* 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);
-
- // 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.
- // Otherwise only proceed if the new name does not exist and if we're putting it into a directory.
- if( (unlinkOp||
- deleteOp ||
- force ||
- !yaffs_FindObjectByName(newDir,newName)) &&
- newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
- {
- yaffs_SetObjectName(obj,newName);
+
+ 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 dletion then we mark it as a shrink for gc purposes.
- if(yaffs_UpdateObjectHeader(obj,newName,0,deleteOp) >= 0)
- {
+
+ 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)
+int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName,
+ yaffs_Object * newDir, const YCHAR * newName)
{
- yaffs_Object *obj;
+ yaffs_Object *obj=NULL;
+ yaffs_Object *existingTarget=NULL;
int force = 0;
+
+ if(!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
+ if(!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
+
#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
- // Special case for case insemsitive systems (eg. WinCE).
- // While look-up is case insensitive, the name isn't.
- // THerefore we might want to change x.txt to X.txt
- if(oldDir == newDir && yaffs_strcmp(oldName,newName) == 0)
- {
+ /* 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);
- if(obj && obj->renameAllowed)
- {
- return yaffs_ChangeObjectName(obj,newDir,newName,force);
}
- return YAFFS_FAIL;
-}
-
-
+#endif
-static int yaffs_CheckObjectHashSanity(yaffs_Device *dev)
-{
- // Scan the buckets and check that the lists
- // have as many members as the count says there are
- int bucket;
- int countEm;
- struct list_head *j;
- int ok = YAFFS_OK;
-
- for(bucket = 0; bucket < YAFFS_NOBJECT_BUCKETS; bucket++)
- {
- countEm = 0;
-
- list_for_each(j,&dev->objectBucket[bucket].list)
- {
- countEm++;
+ else if (yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
+ /* ENAMETOOLONG */
+ return YAFFS_FAIL;
+
+ obj = yaffs_FindObjectByName(oldDir, oldName);
+
+ if (obj && obj->renameAllowed) {
+
+ /* Now do the handling for an existing target, if there is one */
+
+ existingTarget = yaffs_FindObjectByName(newDir, newName);
+ if (existingTarget &&
+ existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+ !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
+ /* There is a target that is a non-empty directory, so we fail */
+ return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
+ } else if (existingTarget && existingTarget != obj) {
+ /* Nuke the target first, using shadowing,
+ * but only if it isn't the same object
+ */
+ yaffs_ChangeObjectName(obj, newDir, newName, force,
+ existingTarget->objectId);
+ yaffs_UnlinkObject(existingTarget);
}
-
- if(countEm != dev->objectBucket[bucket].count)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("Inode hash inconsistency" TENDSTR)));
- ok = YAFFS_FAIL;
- }
- }
- return ok;
+ return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
+ }
+ return YAFFS_FAIL;
}
-#if 0
-void yaffs_ObjectTest(yaffs_Device *dev)
+/*------------------------- Block Management and Page Allocation ----------------*/
+
+static int yaffs_InitialiseBlocks(yaffs_Device * dev)
{
- yaffs_Object *in[1000];
- int inNo[1000];
- yaffs_Object *inold[1000];
- int i;
- int j;
+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
- memset(in,0,1000*sizeof(yaffs_Object *));
- memset(inold,0,1000*sizeof(yaffs_Object *));
-
- yaffs_CheckObjectHashSanity(dev);
+ dev->blockInfo = NULL;
+ dev->chunkBits = NULL;
- for(j = 0; j < 10; j++)
- {
- //T(("%d\n",j));
-
- for(i = 0; i < 1000; i++)
- {
- in[i] = yaffs_CreateNewObject(dev,-1,YAFFS_OBJECT_TYPE_FILE);
- if(!in[i])
- {
- YINFO("No more inodes");
- }
- else
- {
- inNo[i] = in[i]->objectId;
- }
- }
-
- for(i = 0; i < 1000; i++)
- {
- if(yaffs_FindObjectByNumber(dev,inNo[i]) != in[i])
- {
- //T(("Differnce in look up test\n"));
- }
- else
- {
- // T(("Look up ok\n"));
- }
- }
+ 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;
- yaffs_CheckObjectHashSanity(dev);
+ if(dev->blockInfo){
- for(i = 0; i < 1000; i+=3)
- {
- yaffs_FreeObject(in[i]);
- in[i] = NULL;
+ /* 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;
}
-
-
- yaffs_CheckObjectHashSanity(dev);
+ else
+ dev->chunkBitsAlt = 0;
}
-
-}
-
-#endif
-
-/////////////////////////// Block Management and Page Allocation ///////////////////
-
-
-static int yaffs_InitialiseBlocks(yaffs_Device *dev,int nBlocks)
-{
- dev->allocationBlock = -1; // force it to get a new one
- //Todo we're assuming the malloc will pass.
- dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
- // Set up dynamic blockinfo stuff.
- dev->chunkBitmapStride = (dev->nChunksPerBlock+7)/8;
- dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
- if(dev->blockInfo && dev->chunkBits)
- {
- memset(dev->blockInfo,0,nBlocks * sizeof(yaffs_BlockInfo));
- memset(dev->chunkBits,0,dev->chunkBitmapStride * nBlocks);
+
+ 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)
+static void yaffs_DeinitialiseBlocks(yaffs_Device * dev)
{
- YFREE(dev->blockInfo);
+ if(dev->blockInfoAlt && dev->blockInfo)
+ YFREE_ALT(dev->blockInfo);
+ else if(dev->blockInfo)
+ YFREE(dev->blockInfo);
+
+ dev->blockInfoAlt = 0;
+
dev->blockInfo = NULL;
- YFREE(dev->chunkBits);
+
+ 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)
+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
+ if (!dev->isYaffs2)
+ return 1; /* disqualification only applies to yaffs2. */
- // 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)
- {
+ 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->startBlock; i <= dev->endBlock; 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;
+ 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.
+ /* 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);
-
-
- return 1;
}
-// FindDiretiestBlock is used to select the dirtiest block (or close enough)
-// for garbage collection.
-//
-
-
+/* FindDiretiestBlock is used to select the dirtiest block (or close enough)
+ * for garbage collection.
+ */
-static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,int aggressive)
+static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev,
+ int aggressive)
{
int b = dev->currentDirtyChecker;
-
+
int i;
int iterations;
int dirtiest = -1;
- int pagesInUse;
+ int pagesInUse = 0;
+ int prioritised=0;
yaffs_BlockInfo *bi;
- static int nonAggressiveSkip = 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.
+ 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++){
- nonAggressiveSkip--;
-
- if(!aggressive &&(nonAggressiveSkip > 0))
- {
- return -1;
+ 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;
}
- pagesInUse = (aggressive)? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
- if(aggressive)
- {
- iterations = dev->endBlock - dev->startBlock + 1;
+ /* 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;
}
- else
- {
- iterations = dev->endBlock - dev->startBlock + 1;
- iterations = iterations / 16;
- if(iterations > 200)
- {
+
+ 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 ; i++)
- {
+
+ for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
b++;
- if ( b < dev->startBlock || b > dev->endBlock)
- {
- b = dev->startBlock;
+ if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
+ b = dev->internalStartBlock;
}
- if(b < dev->startBlock || b > dev->endBlock)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>> Block %d is not valid" TENDSTR),b));
+ if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("**>> Block %d is not valid" TENDSTR), b));
YBUG();
}
-
- bi = yaffs_GetBlockInfo(dev,b);
-
- if(bi->blockState == YAFFS_BLOCK_STATE_FULL &&
- (bi->pagesInUse - bi->softDeletions )< pagesInUse &&
- yaffs_BlockNotDisqualifiedFromGC(dev,bi))
- {
+
+ 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" TENDSTR),dirtiest,dev->nChunksPerBlock - pagesInUse));
+
+ 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; // clear this
-
- if(dirtiest > 0)
- {
- nonAggressiveSkip = 4;
+
+ dev->oldestDirtySequence = 0;
+
+ if (dirtiest > 0) {
+ dev->nonAggressiveSkip = 4;
}
return dirtiest;
}
-
-static void yaffs_BlockBecameDirty(yaffs_Device *dev,int blockNo)
+static void yaffs_BlockBecameDirty(yaffs_Device * dev, int blockNo)
{
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,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.
+
+ /* 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)
- {
- erasedOk = yaffs_EraseBlockInNAND(dev,blockNo);
- if(!erasedOk)
- {
+ 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));
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
}
}
- if(erasedOk && (yaffs_traceMask & YAFFS_TRACE_ERASE))
- {
- 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 &&
+ ((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...
+
+ if (erasedOk) {
+ /* Clean it up... */
bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
dev->nErasedBlocks++;
bi->pagesInUse = 0;
bi->softDeletions = 0;
- bi->hasShrinkHeader=0;
- yaffs_ClearChunkBits(dev,blockNo);
-
- T(YAFFS_TRACE_ERASE,(TSTR("Erased block %d" TENDSTR),blockNo));
- }
- else
- {
- yaffs_RetireBlock(dev,blockNo);
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>> Block %d retired" TENDSTR),blockNo));
- }
-}
-
-static void yaffs_DumpBlockStats(yaffs_Device *dev)
-{
- int i,j;
- yaffs_BlockInfo *bi;
-
- for(i= dev->startBlock; i <=dev->endBlock; i++)
- {
- bi = yaffs_GetBlockInfo(dev,i);
- T(YAFFS_TRACE_ALLOCATE,(TSTR("%3d state %d shrink %d inuse %d/%d seq %d pages"),i,
- bi->blockState,bi->hasShrinkHeader,bi->pagesInUse,bi->softDeletions,bi->sequenceNumber));
-
- for(j = 0; j < dev->nChunksPerBlock; j++)
- {
- if(yaffs_CheckChunkBit(dev,i,j))
- {
- T(YAFFS_TRACE_ALLOCATE,(TSTR(" %d"),j));
+ bi->hasShrinkHeader = 0;
+ bi->skipErasedCheck = 1; /* This is clean, so no need to check */
+ bi->gcPrioritise = 0;
+ yaffs_ClearChunkBits(dev, blockNo);
- }
- }
- T(YAFFS_TRACE_ALLOCATE,(TSTR(" " TENDSTR)));
+ 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)
+static int yaffs_FindBlockForAllocation(yaffs_Device * dev)
{
int i;
-
+
yaffs_BlockInfo *bi;
-
-#if 0
- static int j = 0;
- j++;
- if(j < 0 || j > 100)
- {
- j = 0;
- yaffs_DumpBlockStats(dev);
- }
-
-#endif
-
- 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)));
+
+ if (dev->nErasedBlocks < 1) {
+ /* Hoosterman we've got a problem.
+ * Can't get space to gc
+ */
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
return -1;
}
- // Find an empty block.
-
- for(i = dev->startBlock; i <= dev->endBlock; i++)
- {
+ /* Find an empty block. */
+
+ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
dev->allocationBlockFinder++;
- if(dev->allocationBlockFinder < dev->startBlock || dev->allocationBlockFinder> dev->endBlock)
- {
- dev->allocationBlockFinder = dev->startBlock;
+ 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 = 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" TENDSTR),dev->allocationBlockFinder,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_ERROR, (TSTR("yaffs tragedy: no more eraased blocks, but there should have been one" TENDSTR)));
-
- return -1;
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+ ("yaffs tragedy: no more erased blocks, but there should have been %d"
+ TENDSTR), dev->nErasedBlocks));
+
+ return -1;
}
-static int yaffs_AllocateChunk(yaffs_Device *dev,int useReserve)
+static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
+{
+ if(!dev->nCheckpointBlocksRequired &&
+ dev->isYaffs2){
+ /* Not a valid value so recalculate */
+ int nBytes = 0;
+ int nBlocks;
+ int devBlocks = (dev->endBlock - dev->startBlock + 1);
+ int tnodeSize;
+
+ tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+
+ if(tnodeSize < sizeof(yaffs_Tnode))
+ tnodeSize = sizeof(yaffs_Tnode);
+
+ nBytes += sizeof(yaffs_CheckpointValidity);
+ nBytes += sizeof(yaffs_CheckpointDevice);
+ nBytes += devBlocks * sizeof(yaffs_BlockInfo);
+ nBytes += devBlocks * dev->chunkBitmapStride;
+ nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
+ nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
+ nBytes += sizeof(yaffs_CheckpointValidity);
+ nBytes += sizeof(__u32); /* checksum*/
+
+ /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
+
+ nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
+
+ dev->nCheckpointBlocksRequired = nBlocks;
+ }
+
+ return dev->nCheckpointBlocksRequired;
+}
+
+// Check if there's space to allocate...
+// Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
+static int yaffs_CheckSpaceForAllocation(yaffs_Device * dev)
+{
+ int reservedChunks;
+ int reservedBlocks = dev->nReservedBlocks;
+ int checkpointBlocks;
+
+ if(dev->isYaffs2){
+ checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
+ dev->blocksInCheckpoint;
+ if(checkpointBlocks < 0)
+ checkpointBlocks = 0;
+ } else {
+ checkpointBlocks =0;
+ }
+
+ reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
+
+ return (dev->nFreeChunks > reservedChunks);
+}
+
+static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr)
{
int retVal;
yaffs_BlockInfo *bi;
-
- if(dev->allocationBlock < 0)
- {
- // Get next block to allocate off
+
+ if (dev->allocationBlock < 0) {
+ /* Get next block to allocate off */
dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
dev->allocationPage = 0;
}
-
- if(!useReserve && dev->nErasedBlocks </*=*/ dev->nReservedBlocks)
- {
- // Not enough space to allocate unless we're allowed to use the reserve.
+
+ 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)));
+ 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;
+ /* 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);
+ 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)
- {
+
+ /* 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;
-}
-
-
-// To determine if we have enough space we just look at the
-// number of erased blocks.
-// The cache is allowed to use reserved blocks.
+
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
-static int yaffs_CheckSpaceForChunkCache(yaffs_Device *dev)
-{
- return (dev->nErasedBlocks >= dev->nReservedBlocks);
+ return -1;
}
-
-static int yaffs_GetErasedChunks(yaffs_Device *dev)
+static int yaffs_GetErasedChunks(yaffs_Device * dev)
{
- int n;
+ int n;
- n = dev->nErasedBlocks * dev->nChunksPerBlock;
+ n = dev->nErasedBlocks * dev->nChunksPerBlock;
- if(dev->allocationBlock> 0)
- {
- n += (dev->nChunksPerBlock - dev->allocationPage);
- }
+ if (dev->allocationBlock > 0) {
+ n += (dev->nChunksPerBlock - dev->allocationPage);
+ }
- return n;
+ return n;
}
-int yaffs_GarbageCollectBlock(yaffs_Device *dev,int block)
+static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block, int wholeBlock)
{
int oldChunk;
int newChunk;
- int chunkInBlock;
int markNAND;
int retVal = YAFFS_OK;
int cleanups = 0;
int i;
+ int isCheckpointBlock;
+ int matchingChunk;
+ int maxCopies;
int chunksBefore = yaffs_GetErasedChunks(dev);
int chunksAfter;
- yaffs_ExtendedTags tags;
-
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,block);
-
+ yaffs_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));
- //T(("Collecting block %d n %d bits %x\n",block, bi->pagesInUse, bi->pageBits));
+ T(YAFFS_TRACE_TRACING,
+ (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
+ block,
+ bi->pagesInUse,
+ bi->hasShrinkHeader,
+ wholeBlock));
- bi->hasShrinkHeader = 0; // clear the flag so that the block can erase
+ /*yaffs_VerifyFreeChunks(dev); */
+ bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
- if(!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
- {
+ /* Take off the number of soft deleted entries because
+ * they're going to get really deleted during GC.
+ */
+ dev->nFreeChunks -= bi->softDeletions;
- __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
+ dev->isDoingGC = 1;
- 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;
-
- //T(("copying page %x from %d to %d\n",mask,oldChunk,newChunk));
-
- yaffs_InitialiseTags(&tags);
-
- yaffs_ReadChunkWithTagsFromNAND(dev,oldChunk,buffer, &tags);
+ 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 {
- 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)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("page %d in gc has no object " TENDSTR),oldChunk));
- }
-
- if(object && object->deleted && tags.chunkId != 0)
- {
- // Data chunk in a deleted file, throw it away
- // It's a deleted data chunk,
- // No need to copy this, just forget about it and fix up the
- // object.
-
- //yaffs_PutChunkIntoFile(object, tags.chunkId, 0,0);
- 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);
+ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+
+ yaffs_VerifyBlock(dev,bi,block);
+
+ maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
+ oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
+
+ for ( /* init already done */;
+ retVal == YAFFS_OK &&
+ dev->gcChunk < dev->nChunksPerBlock &&
+ (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING)&&
+ maxCopies > 0;
+ dev->gcChunk++, oldChunk++) {
+ if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
+
+ /* This page is in use and might need to be copied off */
- }
- 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++;
+ maxCopies--;
- dev->nGCCopies++;
+ markNAND = 1;
- newChunk = yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags,1);
-
- if(newChunk < 0)
- {
- retVal = YAFFS_FAIL;
- }
- else
- {
-
- // Ok, now fix up the Tnodes etc.
-
+ yaffs_InitialiseTags(&tags);
+
+ yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
+ buffer, &tags);
+
+ object =
+ yaffs_FindObjectByNumber(dev,
+ tags.objectId);
+
+ T(YAFFS_TRACE_GC_DETAIL,
+ (TSTR
+ ("Collecting chunk in block %d, %d %d %d " TENDSTR),
+ dev->gcChunk, tags.objectId, tags.chunkId,
+ tags.byteCount));
+
+ if(object && !yaffs_SkipVerification(dev)){
if(tags.chunkId == 0)
- {
- // It's a header
- object->chunkId = newChunk;
- object->serial = tags.serialNumber;
- }
+ matchingChunk = object->hdrChunk;
+ else if(object->softDeleted)
+ matchingChunk = oldChunk; /* Defeat the test */
else
- {
- // It's a data chunk
- yaffs_PutChunkIntoFile(object, tags.chunkId, newChunk,0);
- }
+ 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));
+
}
- }
-
- yaffs_DeleteChunk(dev,oldChunk,markNAND,__LINE__);
-
- }
- }
-
- yaffs_ReleaseTempBuffer(dev,buffer,__LINE__);
+ 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));
+ }
- // 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);
- }
+ if (object &&
+ object->deleted &&
+ object->softDeleted &&
+ tags.chunkId != 0) {
+ /* Data chunk in a soft deleted file, throw it away
+ * It's a soft deleted data chunk,
+ * No need to copy this, just forget about it and
+ * fix up the object.
+ */
+
+ object->nDataChunks--;
+
+ if (object->nDataChunks <= 0) {
+ /* remeber to clean up the object */
+ dev->gcCleanupList[cleanups] =
+ tags.objectId;
+ cleanups++;
+ }
+ markNAND = 0;
+ } else if (0
+ /* Todo object && object->deleted && object->nDataChunks == 0 */
+ ) {
+ /* Deleted object header with no data chunks.
+ * Can be discarded and the file deleted.
+ */
+ object->hdrChunk = 0;
+ yaffs_FreeTnode(object->myDev,
+ object->variant.
+ fileVariant.top);
+ object->variant.fileVariant.top = NULL;
+ yaffs_DoGenericObjectDeletion(object);
+
+ } else if (object) {
+ /* It's either a data chunk in a live file or
+ * an ObjectHeader, so we're interested in it.
+ * NB Need to keep the ObjectHeaders of deleted files
+ * until the whole file has been deleted off
+ */
+ tags.serialNumber++;
+
+ dev->nGCCopies++;
+
+ if (tags.chunkId == 0) {
+ /* It is an object Id,
+ * We need to nuke the shrinkheader flags first
+ * We no longer want the shrinkHeader flag since its work is done
+ * and if it is left in place it will mess up scanning.
+ * Also, clear out any shadowing stuff
+ */
+
+ yaffs_ObjectHeader *oh;
+ oh = (yaffs_ObjectHeader *)buffer;
+ oh->isShrink = 0;
+ 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->hdrChunk = newChunk;
+ object->serial = tags.serialNumber;
+ } else {
+ /* It's a data chunk */
+ yaffs_PutChunkIntoFile
+ (object,
+ tags.chunkId,
+ newChunk, 0);
+ }
+ }
+ }
- }
+ if(retVal == YAFFS_OK)
+ yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
- if(chunksBefore >= (chunksAfter = yaffs_GetErasedChunks(dev)))
- {
- T(YAFFS_TRACE_GC,(TSTR("gc did not increase free chunks before %d after %d" TENDSTR),chunksBefore,chunksAfter));
- }
-
- return YAFFS_OK;
-}
+ }
+ }
-#if 0
-static yaffs_Object *yaffs_FindDeletedUnlinkedFile(yaffs_Device *dev)
-{
- // find a file to delete
- struct list_head *i;
- yaffs_Object *l;
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+
- //Scan the unlinked files looking for one to delete
- list_for_each(i,&dev->unlinkedDir->variant.directoryVariant.children)
- {
- if(i)
- {
- l = list_entry(i, yaffs_Object,siblings);
- if(l->deleted)
- {
- return l;
+ /* 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--;
}
- }
- }
- return NULL;
-}
+ }
-static void yaffs_DoUnlinkedFileDeletion(yaffs_Device *dev)
-{
- // This does background deletion on unlinked files.. only deleted ones.
- // If we don't have a file we're working on then find one
- if(!dev->unlinkedDeletion && dev->nDeletedFiles > 0)
- {
- dev->unlinkedDeletion = yaffs_FindDeletedUnlinkedFile(dev);
}
-
- // OK, we're working on a file...
- if(dev->unlinkedDeletion)
- {
- yaffs_Object *obj = dev->unlinkedDeletion;
- int delresult;
- int limit; // Number of chunks to delete in a file.
- // NB this can be exceeded, but not by much.
-
- limit = -1;
- delresult = yaffs_DeleteWorker(obj, obj->variant.fileVariant.top, obj->variant.fileVariant.topLevel, 0,&limit);
-
- if(obj->nDataChunks == 0)
- {
- // Done all the deleting of data chunks.
- // Now dump the header and clean up
- yaffs_FreeTnode(dev,obj->variant.fileVariant.top);
- obj->variant.fileVariant.top = NULL;
- yaffs_DoGenericObjectDeletion(obj);
- dev->nDeletedFiles--;
- dev->nUnlinkedFiles--;
- dev->nBackgroundDeletions++;
- dev->unlinkedDeletion = NULL;
- }
+ 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));
}
-}
-#endif
-
-#if 0
-#define YAFFS_GARBAGE_COLLECT_LOW_WATER 2
-static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
-{
- int block;
- int aggressive=0;
-
- //yaffs_DoUnlinkedFileDeletion(dev);
-
- if(dev->nErasedBlocks <= (dev->nReservedBlocks + YAFFS_GARBAGE_COLLECT_LOW_WATER))
- {
- aggressive = 1;
- }
-
- if(aggressive)
- {
- block = yaffs_FindBlockForGarbageCollection(dev,aggressive);
-
- if(block >= 0)
- {
- dev->garbageCollections++;
- return yaffs_GarbageCollectBlock(dev,block);
- }
- else
- {
- return YAFFS_FAIL;
- }
+ /* If the gc completed then clear the current gcBlock so that we find another. */
+ if(bi->blockState != YAFFS_BLOCK_STATE_COLLECTING){
+ dev->gcBlock = -1;
+ dev->gcChunk = 0;
}
+
+ dev->isDoingGC = 0;
- return YAFFS_OK;
+ return retVal;
}
-#endif
-// 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 dirtier blocks.
-// Passive gc only inspects smaller areas and will only accept cleaner blocks.
-//
-// The idea is to help clear out space in a more spread-out manner.
-// Dunno if it really does anything useful.
-//
-int yaffs_CheckGarbageCollection(yaffs_Device *dev)
+/* 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 aggressive;
int gcOk = YAFFS_OK;
int maxTries = 0;
- //yaffs_DoUnlinkedFileDeletion(dev);
+ int checkpointBlockAdjust;
- // This loop should pass the first time.
- // We'll only see looping here if the erase of the collected block fails.
+ if (dev->isDoingGC) {
+ /* Bail out so we don't get recursive gc */
+ return YAFFS_OK;
+ }
- do{
+ /* This loop should pass the first time.
+ * We'll only see looping here if the erase of the collected block fails.
+ */
+
+ do {
maxTries++;
- if(dev->nErasedBlocks <= (dev->nReservedBlocks + 2))
- {
- // We need a block soon...
+
+ checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - 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
+ } else {
+ /* We're in no hurry */
aggressive = 0;
}
-
- block = yaffs_FindBlockForGarbageCollection(dev,aggressive);
-
- if(block > 0)
- {
- dev->garbageCollections++;
- if(!aggressive)
- {
- dev->passiveGarbageCollections++;
+
+ if(dev->gcBlock <= 0){
+ dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
+ dev->gcChunk = 0;
+ }
+
+ block = dev->gcBlock;
+
+ if (block > 0) {
+ dev->garbageCollections++;
+ if (!aggressive) {
+ dev->passiveGarbageCollections++;
}
- T(YAFFS_TRACE_GC,(TSTR("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),dev->nErasedBlocks,aggressive));
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
+ dev->nErasedBlocks, aggressive));
- gcOk = yaffs_GarbageCollectBlock(dev,block);
+ gcOk = yaffs_GarbageCollectBlock(dev,block,aggressive);
}
- if(dev->nErasedBlocks <= (dev->nReservedBlocks + 1))
- {
- T(YAFFS_TRACE_GC,(TSTR("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d" TENDSTR),dev->nErasedBlocks,maxTries,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 + 1)) && (block > 0) && (maxTries < 5));
+ } while ((dev->nErasedBlocks < dev->nReservedBlocks) &&
+ (block > 0) &&
+ (maxTries < 2));
- return aggressive ? gcOk: YAFFS_OK;
+ return aggressive ? gcOk : YAFFS_OK;
}
+/*------------------------- TAGS --------------------------------*/
-//////////////////////////// TAGS ///////////////////////////////////////
-
-
-void yaffs_InitialiseTags(yaffs_ExtendedTags *tags)
+static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId,
+ int chunkInObject)
{
- memset(tags,0,sizeof(yaffs_ExtendedTags));
- tags->validMarker0 = 0xAAAAAAAA;
- tags->validMarker1 = 0x55555555;
-}
-
-static int yaffs_ValidateTags(yaffs_ExtendedTags *tags)
-{
- return (tags->validMarker0 == 0xAAAAAAAA && tags->validMarker1 == 0x55555555);
+ return (tags->chunkId == chunkInObject &&
+ tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
}
-#if 0
+/*-------------------- Data file manipulation -----------------*/
-void yaffs_CalcTagsECC(yaffs_Tags *tags)
+static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode,
+ yaffs_ExtendedTags * tags)
{
- // Calculate an ecc
-
- unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
- unsigned i,j;
- unsigned ecc = 0;
- unsigned bit = 0;
-
- tags->ecc = 0;
-
- for(i = 0; i < 8; i++)
- {
- for(j = 1; j &0xff; j<<=1)
- {
- bit++;
- if(b[i] & j)
- {
- ecc ^= bit;
- }
- }
- }
-
- tags->ecc = ecc;
-
-
-}
+ /*Get the Tnode, then get the level 0 offset chunk offset */
+ yaffs_Tnode *tn;
+ int theChunk = -1;
+ yaffs_ExtendedTags localTags;
+ int retVal = -1;
-int yaffs_CheckECCOnTags(yaffs_Tags *tags)
-{
- unsigned ecc = tags->ecc;
-
- yaffs_CalcTagsECC(tags);
-
- ecc ^= tags->ecc;
-
- if(ecc && ecc <= 64)
- {
- // TODO: Handle the failure better. Retire?
- unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
+ yaffs_Device *dev = in->myDev;
- ecc--;
-
- b[ecc / 8] ^= (1 << (ecc & 7));
-
- // Now recvalc the ecc
- yaffs_CalcTagsECC(tags);
-
- return 1; // recovered error
- }
- else if(ecc)
- {
- // Wierd ecc failure value
- // TODO Need to do somethiong here
- return -1; //unrecovered error
+ if (!tags) {
+ /* Passed a NULL, so use our own tags space */
+ tags = &localTags;
}
-
- return 0;
-}
-static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr)
-{
- yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
-
- yaffs_CalcTagsECC(tagsPtr);
-
- sparePtr->tagByte0 = tu->asBytes[0];
- sparePtr->tagByte1 = tu->asBytes[1];
- sparePtr->tagByte2 = tu->asBytes[2];
- sparePtr->tagByte3 = tu->asBytes[3];
- sparePtr->tagByte4 = tu->asBytes[4];
- sparePtr->tagByte5 = tu->asBytes[5];
- sparePtr->tagByte6 = tu->asBytes[6];
- sparePtr->tagByte7 = tu->asBytes[7];
-}
+ tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
-static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr)
-{
- yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
- int result;
+ if (tn) {
+ theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
- tu->asBytes[0]= sparePtr->tagByte0;
- tu->asBytes[1]= sparePtr->tagByte1;
- tu->asBytes[2]= sparePtr->tagByte2;
- tu->asBytes[3]= sparePtr->tagByte3;
- tu->asBytes[4]= sparePtr->tagByte4;
- tu->asBytes[5]= sparePtr->tagByte5;
- tu->asBytes[6]= sparePtr->tagByte6;
- tu->asBytes[7]= sparePtr->tagByte7;
-
- result = yaffs_CheckECCOnTags(tagsPtr);
- if(result> 0)
- {
- dev->tagsEccFixed++;
- }
- else if(result <0)
- {
- dev->tagsEccUnfixed++;
+ retVal =
+ yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
+ chunkInInode);
}
+ return retVal;
}
-static void yaffs_SpareInitialise(yaffs_Spare *spare)
+static int yaffs_FindAndDeleteChunkInFile(yaffs_Object * in, int chunkInInode,
+ yaffs_ExtendedTags * tags)
{
- memset(spare,0xFF,sizeof(yaffs_Spare));
-}
+ /* Get the Tnode, then get the level 0 offset chunk offset */
+ yaffs_Tnode *tn;
+ int theChunk = -1;
+ yaffs_ExtendedTags localTags;
-#endif
+ yaffs_Device *dev = in->myDev;
+ int retVal = -1;
-#if 0
-static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev, const __u8 *buffer, yaffs_ExtendedTags *tags, int useReserve)
-{
- // NB There must be tags, data is optional
- // If there is data, then an ECC is calculated on it.
-
- yaffs_Spare spare;
-
- if(!tags)
- {
- return YAFFS_FAIL;
+ if (!tags) {
+ /* Passed a NULL, so use our own tags space */
+ tags = &localTags;
}
-
- //yaffs_SpareInitialise(&spare);
-
- //if(!dev->useNANDECC && buffer)
- //{
- // yaffs_CalcECC(buffer,&spare);
- //}
-
- //yaffs_LoadTagsIntoSpare(&spare,tags);
-
- return yaffs_WriteNewChunkToNAND(dev,buffer,&spare,useReserve);
-
-}
-#endif
-
-static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId, int chunkInObject)
-{
- return ( tags->chunkId == chunkInObject &&
- tags->objectId == objectId &&
- !tags->chunkDeleted) ? 1 : 0;
-
-}
+ tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
+ if (tn) {
-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 = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] << dev->chunkGroupBits;
-
- retVal = yaffs_FindChunkInGroup(dev,theChunk,tags,in->objectId,chunkInInode);
- }
- return retVal;
-}
+ theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
-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;
+ retVal =
+ yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
+ chunkInInode);
- 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 = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] << dev->chunkGroupBits;
-
- retVal = yaffs_FindChunkInGroup(dev,theChunk,tags,in->objectId,chunkInInode);
-
- // Delete the entry in the filestructure (if found)
- if(retVal != -1)
- {
- tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = 0;
+ /* 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;
-}
+ } 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)
+static int yaffs_CheckFileSanity(yaffs_Object * in)
{
int chunk;
int nChunks;
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"));
+ 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->nBytesPerChunk -1)/in->myDev->nBytesPerChunk;
-
- for(chunk = 1; chunk <= nChunks; chunk++)
- {
- tn = yaffs_FindLevel0Tnode(in->myDev,&in->variant.fileVariant, chunk);
-
- if(tn)
- {
-
- theChunk = tn->level0[chunk & YAFFS_TNODES_LEVEL0_MASK] << in->myDev->chunkGroupBits;
-
- if(yaffs_CheckChunkBits(dev,theChunk/dev->nChunksPerBlock,theChunk%dev->nChunksPerBlock))
- {
+ 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; */
- yaffs_ReadChunkTagsFromNAND(in->myDev,theChunk,tags,&chunkDeleted);
- if(yaffs_TagsMatch(tags,in->objectId,chunk,chunkDeleted))
- {
- // found it;
-
}
- }
- else
- {
- //T(("File problem file [%d,%d] NAND %d tags[%d,%d]\n",
- // objId,chunk,theChunk,tags->chunkId,tags->objectId);
-
+ } else {
+
failed = 1;
-
}
-
- }
- else
- {
- //T(("No level 0 found for %d\n", chunk));
+
+ } 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)
+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;
-
- tn = yaffs_AddOrFindLevel0Tnode(dev,&in->variant.fileVariant, chunkInInode);
- if(!tn)
- {
+
+ 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 = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK];
-
- if(inScan)
- {
- // 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.
-
-
- 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
- // To do this we get both sets of tags and compare serial numbers.
- yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND, NULL,&newTags);
-
-
- // Do a proper find
- existingChunk = yaffs_FindChunkInFile(in,chunkInInode, &existingTags);
+ 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)));
+ 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( in->myDev->isYaffs2 ||
- existingChunk <= 0 ||
- ((existingSerial+1) & 3) == newSerial)
- {
- // Use new
- // Delete the old one and drop through to update the tnode
- yaffs_DeleteChunk(dev,existingChunk,1,__LINE__);
+ /* NB The deleted flags should be false, otherwise the chunks will
+ * not be loaded during a scan
+ */
+
+ if(inScan > 0) {
+ newSerial = newTags.serialNumber;
+ existingSerial = existingTags.serialNumber;
}
- else
- {
- // Use existing.
- // Delete the new one and return early so that the tnode isn't changed
- yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__);
+
+ 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)
- {
+
+ if (existingChunk == 0) {
in->nDataChunks++;
}
-
- tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = (chunkInNAND >> dev->chunkGroupBits);
-
- return YAFFS_OK;
-}
+ yaffs_PutLevel0Tnode(dev,tn,chunkInInode,chunkInNAND);
+ return YAFFS_OK;
+}
-int yaffs_ReadChunkDataFromObject(yaffs_Object *in,int chunkInInode, __u8 *buffer)
+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));
+ int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
- memset(buffer,0,in->myDev->nBytesPerChunk); // get sane data if you read a hole
+ 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)
+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;
-
+
+ if (chunkId <= 0)
+ return;
+
+
dev->nDeletions++;
block = chunkId / dev->nChunksPerBlock;
page = chunkId % dev->nChunksPerBlock;
-
- 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_SpareInitialise(&spare);
-#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
- //read data before write, to ensure correct ecc
- //if we're using MTD verification under Linux
- yaffs_ReadChunkFromNAND(dev,chunkId,NULL,&spare,0);
-#endif
+ 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);
+ yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
+ yaffs_HandleUpdateChunk(dev, chunkId, &tags);
+ } else {
+ dev->nUnmarkedDeletions++;
}
- 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 ||
+
+ /* 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)
- {
+ bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
dev->nFreeChunks++;
- yaffs_ClearChunkBit(dev,block,page);
+ 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);
- }
+ 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)); */
}
- 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;
-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.
+ yaffs_Device *dev = in->myDev;
- int prevChunkId;
- yaffs_ExtendedTags prevTags;
-
- int newChunkId;
- yaffs_ExtendedTags newTags;
+ yaffs_CheckGarbageCollection(dev);
- yaffs_Device *dev = in->myDev;
+ /* Get the previous chunk at this location in the file if it exists */
+ prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
- yaffs_CheckGarbageCollection(dev);
+ /* Set up new tags */
+ yaffs_InitialiseTags(&newTags);
- // 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.chunkId = chunkInInode;
newTags.objectId = in->objectId;
- newTags.serialNumber = (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1;
- newTags.byteCount = nBytes;
-
-// yaffs_CalcTagsECC(&newTags);
-
- newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,buffer,&newTags,useReserve);
+ newTags.serialNumber =
+ (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1;
+ newTags.byteCount = nBytes;
+
+ if(nBytes < 1 || nBytes > dev->totalBytesPerChunk){
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
+ while(1){}
+ }
- if(newChunkId >= 0)
- {
- yaffs_PutChunkIntoFile(in,chunkInInode,newChunkId,0);
-
-
- if(prevChunkId >= 0)
- {
- yaffs_DeleteChunk(dev,prevChunkId,1,__LINE__);
+
+ 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;
-// 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)
-{
+ __u8 *buffer = NULL;
+ YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
- yaffs_BlockInfo *bi;
-
- yaffs_Device *dev = in->myDev;
-
- int prevChunkId;
- int retVal = 0;
-
- int newChunkId;
- yaffs_ExtendedTags newTags;
-
- __u8 *buffer = NULL;
- YCHAR oldName[YAFFS_MAX_NAME_LENGTH+1];
-
- // __u8 bufferOld[YAFFS_BYTES_PER_CHUNK];
-
- yaffs_ObjectHeader *oh = NULL;
- // yaffs_ObjectHeader *ohOld = (yaffs_ObjectHeader *)bufferOld;
-
-
- if(!in->fake || force)
- {
-
- yaffs_CheckGarbageCollection(dev);
-
- buffer = yaffs_GetTempBuffer(in->myDev,__LINE__);
- oh = (yaffs_ObjectHeader *)buffer;
-
- prevChunkId = in->chunkId;
-
- if(prevChunkId >= 0)
- {
- yaffs_ReadChunkWithTagsFromNAND(dev,prevChunkId,buffer,NULL);
- memcpy(oldName,oh->name,sizeof(oh->name));
+ yaffs_ObjectHeader *oh = NULL;
+
+ yaffs_strcpy(oldName,_Y("silly old name"));
+
+
+ if (!in->fake ||
+ in == dev->rootDir || /* The rootDir should also be saved */
+ force) {
+
+ yaffs_CheckGarbageCollection(dev);
+ yaffs_CheckObjectDetailsLoaded(in);
+
+ buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
+ oh = (yaffs_ObjectHeader *) buffer;
+
+ prevChunkId = in->hdrChunk;
+
+ 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->nBytesPerChunk);
+ memset(buffer, 0xFF, dev->nDataBytesPerChunk);
- // Header data
oh->type = in->variantType;
-
- oh->st_mode = in->st_mode;
+ oh->yst_mode = in->yst_mode;
+ oh->shadowsObject = oh->inbandShadowsObject = shadows;
#ifdef CONFIG_YAFFS_WINCE
oh->win_atime[0] = in->win_atime[0];
oh->win_ctime[1] = in->win_ctime[1];
oh->win_mtime[1] = in->win_mtime[1];
#else
- oh->st_uid = in->st_uid;
- oh->st_gid = in->st_gid;
- oh->st_atime = in->st_atime;
- oh->st_mtime = in->st_mtime;
- oh->st_ctime = in->st_ctime;
- oh->st_rdev = in->st_rdev;
-#endif
- if(in->parent)
- {
+ 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
- {
+ } else {
oh->parentObjectId = 0;
}
-
- //oh->sum = in->sum;
- if(name && *name)
- {
- memset(oh->name,0,sizeof(oh->name));
- yaffs_strncpy(oh->name,name,YAFFS_MAX_NAME_LENGTH);
- }
- else if(prevChunkId)
- {
- memcpy(oh->name, oldName,sizeof(oh->name));
- }
- else
- {
- memset(oh->name,0,sizeof(oh->name));
+
+ 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 = 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;
+
+ 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
+ /* Tags */
yaffs_InitialiseTags(&newTags);
in->serial++;
newTags.chunkId = 0;
newTags.objectId = in->objectId;
newTags.serialNumber = in->serial;
-
- // 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__);
- }
-
- 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;
+ /* Add extra info for file header */
- }
-
- if(buffer)
- yaffs_ReleaseTempBuffer(dev,buffer,__LINE__);
-
- return retVal;
-}
+ 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);
-/////////////////////// Short Operations Cache ////////////////////////////////
-// In many siturations 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.
-// There are a limited number (~10) of cache chunks per device so that we don't
-// need a very intelligent search.
+ /* Create new chunk in NAND */
+ newChunkId =
+ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
+ (prevChunkId >= 0) ? 1 : 0);
+ if (newChunkId >= 0) {
+ in->hdrChunk = newChunkId;
+ if (prevChunkId >= 0) {
+ yaffs_DeleteChunk(dev, prevChunkId, 1,
+ __LINE__);
+ }
+ if(!yaffs_ObjectHasCachedWriteData(in))
+ in->dirty = 0;
-static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
-{
- yaffs_Device *dev = obj->myDev;
- int lowest;
- int i;
- yaffs_ChunkCache *cache;
- int chunkWritten;
- //int nBytes;
+ /* 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;
- if (nCaches > 0)
- {
- do{
+ 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)
- {
+
+ /* 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
-#if 0
- nBytes = cache->object->variant.fileVariant.fileSize - ((cache->chunkId -1) * YAFFS_BYTES_PER_CHUNK);
-
- if(nBytes > YAFFS_BYTES_PER_CHUNK)
- {
- nBytes= YAFFS_BYTES_PER_CHUNK;
- }
-#endif
- chunkWritten = yaffs_WriteChunkDataToObject(cache->object,
- cache->chunkId,
- cache->data,
- cache->nBytes,1);
+ 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)));
+
+ } 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)
+ *
+ *
+ */
-// Grab us a 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)
+void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
{
+ yaffs_Object *obj;
+ int nCaches = dev->nShortOpCaches;
int i;
- int usage;
- int theOne;
- if(dev->nShortOpCaches > 0)
- {
- for(i = 0; i < dev->nShortOpCaches; i++)
- {
- if(!dev->srCache[i].object)
- {
- //T(("Grabbing empty %d\n",i));
-
- //printf("Grabbing empty %d\n",i);
-
- return &dev->srCache[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;
+
}
-
- return NULL;
+ if(obj)
+ yaffs_FlushFilesChunkCache(obj);
+
+ } while(obj);
- 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;
- }
+}
+
+
+/* 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;
+
+ if (dev->nShortOpCaches > 0) {
+ for (i = 0; i < dev->nShortOpCaches; i++) {
+ if (!dev->srCache[i].object)
+ return &dev->srCache[i];
}
-
- //T(("Grabbing non-empty %d\n",theOne));
-
- //if(theOne >= 0) printf("Grabbed non-empty cache %d\n",theOne);
-
- return theOne >= 0 ? &dev->srCache[theOne] : NULL;
- }
- else
- {
- return NULL;
}
-
-}
+ return NULL;
+}
-static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
+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...
-
+
+ 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.
-
+
+ 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 = 0;
+ usage = -1;
cache = NULL;
- pushout = 0;
-
- for(i = 0; i < dev->nShortOpCaches; i++)
- {
- if( dev->srCache[i].object &&
- !dev->srCache[i].locked &&
- (dev->srCache[i].lastUse < usage || !cache))
+ 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;
+ usage = dev->srCache[i].lastUse;
theObj = dev->srCache[i].object;
cache = &dev->srCache[i];
pushout = i;
}
}
-
- if(!cache || cache->dirty)
- {
-
- //printf("Dirty ");
+
+ if (!cache || cache->dirty) {
+ /* Flush and try again */
yaffs_FlushFilesChunkCache(theObj);
-
- // Try again
cache = yaffs_GrabChunkCacheWorker(dev);
}
- else
- {
- //printf(" pushout %d\n",pushout);
- }
-
- }
+ }
return cache;
- }
- else
+ } else
return NULL;
}
-
-// Find a cached chunk
-static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj, int chunkId)
+/* 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)
- {
+ 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)
+/* 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
+ if (dev->nShortOpCaches > 0) {
+ if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
+ /* Reset the cache usages */
int i;
- for(i = 1; i < dev->nShortOpCaches; i++)
- {
+ for (i = 1; i < dev->nShortOpCaches; i++) {
dev->srCache[i].lastUse = 0;
}
dev->srLastUse = 0;
}
dev->srLastUse++;
-
+
cache->lastUse = dev->srLastUse;
- if(isAWrite)
- {
+ 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)
+/* 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 (object->myDev->nShortOpCaches > 0) {
+ yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
- if(cache)
- {
+ 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)
+/* 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)
- {
- // Now invalidate it.
- for(i = 0; i < dev->nShortOpCaches; i++)
- {
- if(dev->srCache[i].object == in)
- {
+
+ 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 --------------------*/
-
-
-///////////////////////// 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, __u32 offset, int nBytes)
+static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev,int head)
{
+ yaffs_CheckpointValidity cp;
+ memset(&cp,0,sizeof(cp));
- int chunk;
- int start;
- int nToCopy;
- int n = nBytes;
- int nDone = 0;
- yaffs_ChunkCache *cache;
+ cp.structType = sizeof(cp);
+ cp.magic = YAFFS_MAGIC;
+ cp.version = YAFFS_CHECKPOINT_VERSION;
+ cp.head = (head) ? 1 : 0;
- yaffs_Device *dev;
+ 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;
- dev = in->myDev;
+ ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp));
- while(n > 0)
- {
- chunk = offset / dev->nBytesPerChunk + 1; // The first chunk is 1
- start = offset % dev->nBytesPerChunk;
+ 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;
+}
- // OK now check for the curveball where the start and end are in
- // the same chunk.
- if( (start + n) < dev->nBytesPerChunk)
- {
- nToCopy = n;
- }
- else
- {
- nToCopy = dev->nBytesPerChunk - start;
- }
+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;
- 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->nBytesPerChunk)
- {
- 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;
+ cp->nDeletedFiles = dev->nDeletedFiles;
+ cp->nUnlinkedFiles = dev->nUnlinkedFiles;
+ cp->nBackgroundDeletions = dev->nBackgroundDeletions;
+ cp->sequenceNumber = dev->sequenceNumber;
+ cp->oldestDirtySequence = dev->oldestDirtySequence;
+
+}
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_UnlockYAFFS(TRUE);
-#endif
- memcpy(buffer,&cache->data[start],nToCopy);
+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;
+}
-#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__);
- }
+static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
+{
+ yaffs_CheckpointDevice cp;
+ __u32 nBytes;
+ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
- }
- 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);
+ 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;
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_UnlockYAFFS(TRUE);
-#endif
- memcpy(buffer,localBuffer,dev->nBytesPerChunk);
+}
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_LockYAFFS(TRUE);
- yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
-#endif
+static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
+{
+ yaffs_CheckpointDevice cp;
+ __u32 nBytes;
+ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
-#else
- // A full chunk. Read directly into the supplied buffer.
- yaffs_ReadChunkDataFromObject(in,chunk,buffer);
-#endif
- }
+ int ok;
+
+ ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp));
+ if(!ok)
+ return 0;
- n -= nToCopy;
- offset += nToCopy;
- buffer += nToCopy;
- nDone += nToCopy;
+ if(cp.structType != sizeof(cp))
+ return 0;
- }
- return nDone;
+ 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)
+{
-
-int yaffs_WriteDataToFile(yaffs_Object *in,const __u8 * buffer, __u32 offset, int nBytes)
-{
+ cp->objectId = obj->objectId;
+ cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
+ cp->hdrChunk = obj->hdrChunk;
+ cp->variantType = obj->variantType;
+ cp->deleted = obj->deleted;
+ cp->softDeleted = obj->softDeleted;
+ cp->unlinked = obj->unlinked;
+ cp->fake = obj->fake;
+ cp->renameAllowed = obj->renameAllowed;
+ cp->unlinkAllowed = obj->unlinkAllowed;
+ cp->serial = obj->serial;
+ cp->nDataChunks = obj->nDataChunks;
- int chunk;
- int start;
- int nToCopy;
- int n = nBytes;
- int nDone = 0;
- int nToWriteBack;
- int startOfWrite = offset;
- int chunkWritten = 0;
- int nBytesRead;
+ 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;
- yaffs_Device *dev;
+ obj->objectId = cp->objectId;
- dev = in->myDev;
+ if(cp->parentId)
+ parent = yaffs_FindOrCreateObjectByNumber(
+ obj->myDev,
+ cp->parentId,
+ YAFFS_OBJECT_TYPE_DIRECTORY);
+ else
+ parent = NULL;
+
+ if(parent)
+ yaffs_AddObjectToDirectory(parent, obj);
+
+ obj->hdrChunk = cp->hdrChunk;
+ obj->variantType = cp->variantType;
+ obj->deleted = cp->deleted;
+ obj->softDeleted = cp->softDeleted;
+ obj->unlinked = cp->unlinked;
+ obj->fake = cp->fake;
+ obj->renameAllowed = cp->renameAllowed;
+ obj->unlinkAllowed = cp->unlinkAllowed;
+ obj->serial = cp->serial;
+ obj->nDataChunks = cp->nDataChunks;
+ if(obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+ obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
+ else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
+ obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
+
+ if(obj->hdrChunk > 0)
+ obj->lazyLoaded = 1;
+}
+
+
+
+static int yaffs_CheckpointTnodeWorker(yaffs_Object * in, yaffs_Tnode * tn,
+ __u32 level, int chunkOffset)
+{
+ int i;
+ yaffs_Device *dev = in->myDev;
+ int ok = 1;
+ int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+
+ if(tnodeSize < sizeof(yaffs_Tnode))
+ tnodeSize = sizeof(yaffs_Tnode);
- while(n > 0 && chunkWritten >= 0)
- {
- chunk = offset / dev->nBytesPerChunk + 1;
- start = offset % dev->nBytesPerChunk;
-
- // OK now check for the curveball where the start and end are in
- // the same chunk.
-
- if( (start + n) < dev->nBytesPerChunk)
- {
- 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->nBytesPerChunk);
-
- if(nBytesRead > dev->nBytesPerChunk)
- {
- nBytesRead = dev->nBytesPerChunk;
+ 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);
+ }
}
-
- nToWriteBack = (nBytesRead > (start + n)) ? nBytesRead : (start +n);
-
- }
- else
- {
- nToCopy = dev->nBytesPerChunk - start;
- nToWriteBack = dev->nBytesPerChunk;
+ } 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,tnodeSize) == tnodeSize);
}
+ }
+
+ return ok;
+
+}
+
+static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
+{
+ __u32 endMarker = ~0;
+ int ok = 1;
- if(nToCopy != dev->nBytesPerChunk)
- {
- // 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 it up.
- cache = yaffs_FindChunkCache(in,chunk);
- if(!cache && yaffs_CheckSpaceForChunkCache(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);
- }
-
- if(cache)
- {
- yaffs_UseChunkCache(dev,cache,1);
- cache->locked = 1;
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_UnlockYAFFS(TRUE);
-#endif
+ 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));
+ }
- memcpy(&cache->data[start],buffer,nToCopy);
+ return ok ? 1 : 0;
+}
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_LockYAFFS(TRUE);
-#endif
- cache->locked = 0;
- cache->nBytes = nToWriteBack;
- }
- 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__);
+static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
+{
+ __u32 baseChunk;
+ int ok = 1;
+ yaffs_Device *dev = obj->myDev;
+ yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
+ yaffs_Tnode *tn;
+ int nread = 0;
+ int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+
+ if(tnodeSize < sizeof(yaffs_Tnode))
+ tnodeSize = sizeof(yaffs_Tnode);
+
+ ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk));
+
+ while(ok && (~baseChunk)){
+ nread++;
+ /* Read level 0 tnode */
- 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__);
-
- //T(("Write with readback to chunk %d %d start %d copied %d wrote back %d\n",chunk,chunkWritten,start, nToCopy, nToWriteBack));
- }
-
- }
+
+ /* printf("read tnode at %d\n",baseChunk); */
+ tn = yaffs_GetTnodeRaw(dev);
+ if(tn)
+ ok = (yaffs_CheckpointRead(dev,tn,tnodeSize) == tnodeSize);
else
- {
+ ok = 0;
-#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->nBytesPerChunk);
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_LockYAFFS(TRUE);
-#endif
- chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,localBuffer,dev->nBytesPerChunk,0);
- yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
-#else
- // A full chunk. Write directly from the supplied buffer.
- chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,buffer,dev->nBytesPerChunk,0);
-#endif
- // Since we've overwritten the cached data, we better invalidate it.
- yaffs_InvalidateChunkCache(in,chunk);
- //T(("Write to chunk %d %d\n",chunk,chunkWritten));
- }
-
- if(chunkWritten >= 0)
- {
- n -= nToCopy;
- offset += nToCopy;
- buffer += nToCopy;
- nDone += nToCopy;
+ 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 ylist_head *lh;
+
+
+ /* Iterate through the objects in each hash entry,
+ * dumping them to the checkpointing stream.
+ */
+
+ for(i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++){
+ ylist_for_each(lh, &dev->objectBucket[i].list) {
+ if (lh) {
+ obj = ylist_entry(lh, yaffs_Object, hashLink);
+ if (!obj->deferedFree) {
+ yaffs_ObjectToCheckpointObject(&cp,obj);
+ cp.structType = sizeof(cp);
+
+ T(YAFFS_TRACE_CHECKPOINT,(
+ TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
+ cp.objectId,cp.parentId,cp.variantType,cp.hdrChunk,(unsigned) obj));
+
+ 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);
- // Update file object
+ 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;
- if((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
- {
- in->variant.fileVariant.fileSize = (startOfWrite + nDone);
+ while(ok && !done) {
+ ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp));
+ if(cp.structType != sizeof(cp)) {
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("struct size %d instead of %d ok %d"TENDSTR),
+ cp.structType,sizeof(cp),ok));
+ ok = 0;
+ }
+
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
+ cp.objectId,cp.parentId,cp.variantType,cp.hdrChunk));
+
+ if(ok && cp.objectId == ~0)
+ done = 1;
+ else if(ok){
+ obj = yaffs_FindOrCreateObjectByNumber(dev,cp.objectId, cp.variantType);
+ if(obj) {
+ 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 ylist_head *)
+ hardList;
+ hardList = obj;
+ }
+
+ }
+ }
}
- in->dirty = 1;
+ if(ok)
+ yaffs_HardlinkFixup(dev,hardList);
- return nDone;
+ return ok ? 1 : 0;
}
-static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
+static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
{
-
- yaffs_Device *dev = in->myDev;
- int oldFileSize = in->variant.fileVariant.fileSize;
-
+ __u32 checkpointSum;
+ int ok;
- int lastDel = 1 + (oldFileSize-1)/dev->nBytesPerChunk;
-
- int startDel = 1 + (newSize + dev->nBytesPerChunk - 1)/
- dev->nBytesPerChunk;
- int i;
- int chunkId;
+ yaffs_GetCheckpointSum(dev,&checkpointSum);
+
+ ok = (yaffs_CheckpointWrite(dev,&checkpointSum,sizeof(checkpointSum)) == sizeof(checkpointSum));
+
+ if(!ok)
+ return 0;
+
+ return 1;
+}
- // 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->startBlock * dev->nChunksPerBlock) ||
- chunkId >= ((dev->endBlock+1) * dev->nChunksPerBlock))
- {
- T(YAFFS_TRACE_ALWAYS,("Found daft chunkId %d for %d\n",chunkId,i));
- }
- else
- {
- in->nDataChunks--;
- yaffs_DeleteChunk(dev,chunkId,1,__LINE__);
- }
- }
- }
+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;
}
-int yaffs_ResizeFile(yaffs_Object *in, int newSize)
+
+static int yaffs_WriteCheckpointData(yaffs_Device *dev)
{
- int oldFileSize = in->variant.fileVariant.fileSize;
- int sizeOfPartialChunk;
- yaffs_Device *dev = in->myDev;
+ int ok = 1;
- sizeOfPartialChunk = newSize % dev->nBytesPerChunk;
+ 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;
- yaffs_FlushFilesChunkCache(in);
- yaffs_InvalidateWholeChunkCache(in);
+ return dev->isCheckpointed;
+}
- yaffs_CheckGarbageCollection(dev);
+static int yaffs_ReadCheckpointData(yaffs_Device *dev)
+{
+ int ok = 1;
- if(in->variantType != YAFFS_OBJECT_TYPE_FILE)
- {
- return yaffs_GetFileSize(in);
+ if(dev->skipCheckpointRead || !dev->isYaffs2){
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint read" TENDSTR)));
+ ok = 0;
}
- if(newSize < oldFileSize)
- {
+ 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));
+ }
- yaffs_PruneResizedChunks(in,newSize);
-
- if(sizeOfPartialChunk != 0)
- {
- int lastChunk = 1+ newSize/dev->nBytesPerChunk;
- __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 + sizeOfPartialChunk,0, dev->nBytesPerChunk - sizeOfPartialChunk);
-
- yaffs_WriteChunkDataToObject(in,lastChunk,localBuffer,sizeOfPartialChunk,1);
-
- yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
- }
-
- in->variant.fileVariant.fileSize = newSize;
-
- yaffs_PruneFileStructure(dev,&in->variant.fileVariant);
-
- // TODO write a new object header to show we've shrunk the file
- // Do this only if the file is not in the deleted directory.
- if(in->parent->objectId != YAFFS_OBJECTID_UNLINKED)
- {
- yaffs_UpdateObjectHeader(in,NULL, 0, 1);
- }
+ if(!yaffs_CheckpointClose(dev))
+ ok = 0;
-
- return newSize;
-
- }
- else
- {
- return oldFileSize;
+ 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);
}
}
-loff_t yaffs_GetFileSize(yaffs_Object *obj)
+int yaffs_CheckpointSave(yaffs_Device *dev)
{
- 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;
+
+ 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;
+}
-// yaffs_FlushFile() updates the file's
-// objectId in NAND
+/*--------------------- 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_FlushFile(yaffs_Object *in, int updateTime)
+int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, loff_t offset,
+ int nBytes)
{
- int retVal;
- if(in->dirty)
- {
- //T(("flushing object header\n"));
-
- yaffs_FlushFilesChunkCache(in);
- if(updateTime)
- {
+
+ int chunk;
+ __u32 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
+ * or we're using inband tags then use the cache (if there is caching)
+ * else bypass the cache.
+ */
+ if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
+ if (dev->nShortOpCaches > 0) {
+
+ /* If 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_WinFileTimeNow(in->win_mtime);
-#else
+ 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..*/
- in->st_mtime = Y_CURRENT_TIME;
+ __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__);
+ }
- retVal = (yaffs_UpdateObjectHeader(in,NULL,0,0) >= 0)? YAFFS_OK : YAFFS_FAIL;
- }
- else
- {
- retVal = YAFFS_OK;
- }
-
- return retVal;
-
-}
+ } 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);
-static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
-{
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_UnlockYAFFS(TRUE);
+#endif
+ memcpy(buffer, localBuffer, dev->nDataBytesPerChunk);
- // First off, invalidate the file's data in the cache, without flushing.
- yaffs_InvalidateWholeChunkCache(in);
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_LockYAFFS(TRUE);
+ yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
+#endif
- 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,NULL,0);
+#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;
+ __u32 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);
+
+ if(chunk * dev->nDataBytesPerChunk + start != offset ||
+ start >= dev->nDataBytesPerChunk){
+ T(YAFFS_TRACE_ERROR,(TSTR("AddrToChunk of offset %d gives chunk %d start %d"TENDSTR),
+ (int)offset, chunk,start));
+ }
+ chunk++;
+
+ /* OK now check for the curveball where the start and end are in
+ * the same chunk.
+ */
+
+ if ((start + n) < dev->nDataBytesPerChunk) {
+ nToCopy = n;
+
+ /* 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 >
+ ((int)start + n)) ? nBytesRead : (start + n);
+
+ } else {
+ nToCopy = dev->nDataBytesPerChunk - start;
+ nToWriteBack = dev->nDataBytesPerChunk;
+ }
+
+ if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
+ /* An incomplete start or end chunk (or maybe both start and end chunk),
+ * or we're using inband tags, so we want to use the cache buffers.
+ */
+ if (dev->nShortOpCaches > 0) {
+ yaffs_ChunkCache *cache;
+ /* If we can't find the data in the cache, then load the cache */
+ cache = yaffs_FindChunkCache(in, chunk);
+
+ 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 {
+ /* A full chunk. Write directly from the supplied buffer. */
+
+#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
+
+ 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;
+ __u32 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_FAIL;
+ }
+
+ if (newSize == oldFileSize) {
+ return YAFFS_OK;
+ }
+
+ 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 &&
+ in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
+ in->parent->objectId != YAFFS_OBJECTID_DELETED) {
+ yaffs_UpdateObjectHeader(in, NULL, 0,
+ (newSize < oldFileSize) ? 1 : 0, 0);
+ }
+
+ return YAFFS_OK;
+}
+
+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,_Y("deleted"), 0, 0);
+
+ }
+
+ yaffs_RemoveObjectFromDirectory(in);
+ yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
+ in->hdrChunk = 0;
+
+ 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;
+
+#ifdef __KERNEL__
+ if (!in->myInode) {
+ immediateDeletion = 1;
+ }
+#else
+ if (in->inUse <= 0) {
+ immediateDeletion = 1;
+ }
+#endif
+
+ if (immediateDeletion) {
+ retVal =
+ yaffs_ChangeObjectName(in, in->myDev->deletedDir,
+ _Y("deleted"), 0, 0);
+ T(YAFFS_TRACE_TRACING,
+ (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
+ in->objectId));
+ in->deleted = 1;
+ in->myDev->nDeletedFiles++;
+ if (1 || in->myDev->isYaffs2) {
+ yaffs_ResizeFile(in, 0);
+ }
+ yaffs_SoftDeleteFile(in);
+ } else {
+ retVal =
+ yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
+ _Y("unlinked"), 0, 0);
+ }
+
+
+ return retVal;
+}
+
+int yaffs_DeleteFile(yaffs_Object * in)
+{
+ int retVal = YAFFS_OK;
+ int deleted = in->deleted;
+
+ yaffs_ResizeFile(in,0);
+
+ if (in->nDataChunks > 0) {
+ /* Use soft deletion if there is data in the file.
+ * That won't be the case if it has been resized to zero.
+ */
+ if (!in->unlinked) {
+ retVal = yaffs_UnlinkFile(in);
+ }
+ if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
+ in->deleted = deleted = 1;
+ in->myDev->nDeletedFiles++;
+ yaffs_SoftDeleteFile(in);
+ }
+ return deleted ? YAFFS_OK : YAFFS_FAIL;
+ } else {
+ /* The file has no data chunks so we toss it immediately */
+ yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
+ in->variant.fileVariant.top = NULL;
+ yaffs_DoGenericObjectDeletion(in);
+
+ return YAFFS_OK;
+ }
+}
+
+static int yaffs_DeleteDirectory(yaffs_Object * in)
+{
+ /* First check that the directory is empty. */
+ if (ylist_empty(&in->variant.directoryVariant.children)) {
+ return yaffs_DoGenericObjectDeletion(in);
+ }
+
+ 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
+ */
+ ylist_del_init(&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 (!ylist_empty(&obj->hardLinks)) {
+ /* Curve ball: We're unlinking an object that has a hardlink.
+ *
+ * This problem arises because we are not strictly following
+ * The Linux link/inode model.
+ *
+ * We can't really delete the object.
+ * Instead, we do the following:
+ * - Select a hardlink.
+ * - Unhook it from the hard links
+ * - Unhook it from its parent directory (so that the rename can work)
+ * - Rename the object to the hardlink's name.
+ * - Delete the hardlink
+ */
+
+ yaffs_Object *hl;
+ int retVal;
+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
+
+ hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
+
+ ylist_del_init(&hl->hardLinks);
+ ylist_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;
+ ylist_add(&hl->hardLinks, &in->hardLinks);
+ } else {
+ /* Todo Need to report/handle this better.
+ * Got a problem... hardlink to a non-existant object
+ */
+ hl->variant.hardLinkVariant.equivalentObject = NULL;
+ YINIT_LIST_HEAD(&hl->hardLinks);
+
+ }
+
+ }
+
+}
+
+
+
+
+
+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;
+
+}
+
+
+struct yaffs_ShadowFixerStruct {
+ int objectId;
+ int shadowedId;
+ struct yaffs_ShadowFixerStruct *next;
+};
+
+static int yaffs_Scan(yaffs_Device * dev)
+{
+ yaffs_ExtendedTags tags;
+ int blk;
+ int blockIterator;
+ int startIterator;
+ int endIterator;
+ int result;
+
+ int chunk;
+ int c;
+ int deleted;
+ yaffs_BlockState state;
+ yaffs_Object *hardList = NULL;
+ yaffs_BlockInfo *bi;
+ __u32 sequenceNumber;
+ yaffs_ObjectHeader *oh;
+ yaffs_Object *in;
+ yaffs_Object *parent;
+
+ int alloc_failed = 0;
+
+ struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
+
+
+ __u8 *chunkData;
+
+
+
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
+ dev->internalStartBlock, dev->internalEndBlock));
+
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+
+ dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
+
+ /* Scan all the blocks to determine their state */
+ for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
+ bi = yaffs_GetBlockInfo(dev, blk);
+ yaffs_ClearChunkBits(dev, blk);
+ bi->pagesInUse = 0;
+ bi->softDeletions = 0;
+
+ 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;
+ }
+ }
+
+ startIterator = dev->internalStartBlock;
+ endIterator = dev->internalEndBlock;
+
+ /* For each block.... */
+ for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
+ blockIterator++) {
+
+ YYIELD();
+
+ YYIELD();
+
+ blk = blockIterator;
+
+ bi = yaffs_GetBlockInfo(dev, blk);
+ state = bi->blockState;
+
+ deleted = 0;
+
+ /* For each chunk in each block that needs scanning....*/
+ for (c = 0; !alloc_failed && c < dev->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 (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
+ /* YAFFS1 only...
+ * A deleted chunk
+ */
+ deleted++;
+ dev->nFreeChunks++;
+ /*T((" %d %d deleted\n",blk,c)); */
+ } else if (!tags.chunkUsed) {
+ /* An unassigned chunk in the block
+ * This means that either the block is empty or
+ * this is the one being allocated from
+ */
+
+ if (c == 0) {
+ /* We're looking at the first chunk in the block so the block is unused */
+ state = YAFFS_BLOCK_STATE_EMPTY;
+ dev->nErasedBlocks++;
+ } else {
+ /* this is the block being allocated from */
+ T(YAFFS_TRACE_SCAN,
+ (TSTR
+ (" Allocating from %d %d" TENDSTR),
+ blk, c));
+ state = YAFFS_BLOCK_STATE_ALLOCATING;
+ dev->allocationBlock = blk;
+ dev->allocationPage = c;
+ dev->allocationBlockFinder = blk;
+ /* Set it to here to encourage the allocator to go forth from here. */
+
+ }
+
+ 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) {
+
+ struct yaffs_ShadowFixerStruct *fixer;
+ fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
+ if(fixer){
+ fixer-> next = shadowFixerList;
+ shadowFixerList = fixer;
+ fixer->objectId = tags.objectId;
+ fixer->shadowedId = oh->shadowsObject;
+ }
+
+ }
+
+ if (in && in->valid) {
+ /* We have already filled this one. We have a duplicate and need to resolve it. */
+
+ unsigned existingSerial = in->serial;
+ unsigned newSerial = tags.serialNumber;
+
+ if (((existingSerial + 1) & 3) == newSerial) {
+ /* Use new one - destroy the exisiting one */
+ yaffs_DeleteChunk(dev,
+ in->hdrChunk,
+ 1, __LINE__);
+ in->valid = 0;
+ } else {
+ /* Use existing - destroy this one. */
+ yaffs_DeleteChunk(dev, chunk, 1,
+ __LINE__);
+ }
+ }
+
+ if (in && !in->valid &&
+ (tags.objectId == YAFFS_OBJECTID_ROOT ||
+ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
+ /* We only load some info, don't fiddle with directory structure */
+ in->valid = 1;
+ in->variantType = oh->type;
+
+ in->yst_mode = oh->yst_mode;
+#ifdef CONFIG_YAFFS_WINCE
+ in->win_atime[0] = oh->win_atime[0];
+ in->win_ctime[0] = oh->win_ctime[0];
+ in->win_mtime[0] = oh->win_mtime[0];
+ in->win_atime[1] = oh->win_atime[1];
+ in->win_ctime[1] = oh->win_ctime[1];
+ in->win_mtime[1] = oh->win_mtime[1];
+#else
+ in->yst_uid = oh->yst_uid;
+ in->yst_gid = oh->yst_gid;
+ in->yst_atime = oh->yst_atime;
+ in->yst_mtime = oh->yst_mtime;
+ in->yst_ctime = oh->yst_ctime;
+ in->yst_rdev = oh->yst_rdev;
+#endif
+ in->hdrChunk = chunk;
+ in->serial = tags.serialNumber;
- }
+ } else if (in && !in->valid) {
+ /* we need to load this info */
-
- yaffs_RemoveObjectFromDirectory(in);
- yaffs_DeleteChunk(in->myDev,in->chunkId,1,__LINE__);
- in->chunkId = -1;
+ in->valid = 1;
+ in->variantType = oh->type;
-#ifdef __KERNEL__
- if(in->myInode)
- {
- in->myInode->u.generic_ip = NULL;
- in->myInode = 0;
- }
+ 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_FreeObject(in);
- return YAFFS_OK;
+ in->hdrChunk = chunk;
+ in->serial = tags.serialNumber;
-}
+ yaffs_SetObjectName(in, oh->name);
+ in->dirty = 0;
-// yaffs_DeleteFile deletes the whole file data
-// and the inode associated with the file.
-// It does not delete the links associated with the file.
-static int yaffs_UnlinkFile(yaffs_Object *in)
-{
+ /* 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;
+ YINIT_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;
+ }
-#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND_DELETION
+ yaffs_AddObjectToDirectory(parent, in);
- // Delete the file data & tnodes
+ 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->useHeaderFileSize)
+
+ in->variant.fileVariant.
+ fileSize =
+ oh->fileSize;
+
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ in->variant.hardLinkVariant.
+ equivalentObjectId =
+ oh->equivalentObjectId;
+ in->hardLinks.next =
+ (struct ylist_head *)
+ hardList;
+ hardList = in;
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ in->variant.symLinkVariant.alias =
+ yaffs_CloneString(oh->alias);
+ if(!in->variant.symLinkVariant.alias)
+ alloc_failed = 1;
+ break;
+ }
- yaffs_DeleteWorker(in, in->variant.fileVariant.top, in->variant.fileVariant.topLevel, 0,NULL);
-
+/*
+ if (parent == dev->deletedDir) {
+ yaffs_DestroyObject(in);
+ bi->hasShrinkHeader = 1;
+ }
+*/
+ }
+ }
+ }
- yaffs_FreeTnode(in->myDev,in->variant.fileVariant.top);
-
- return yaffs_DoGenericObjectDeletion(in);
-#else
- int retVal;
- int immediateDeletion=0;
+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+ /* If we got this far while scanning, then the block is fully allocated.*/
+ state = YAFFS_BLOCK_STATE_FULL;
+ }
- if(1)
- {
- //in->unlinked = 1;
- //in->myDev->nUnlinkedFiles++;
- //in->renameAllowed = 0;
-#ifdef __KERNEL__
- if(!in->myInode)
- {
- immediateDeletion = 1;
+ bi->blockState = state;
+ /* Now let's see if it was dirty */
+ if (bi->pagesInUse == 0 &&
+ !bi->hasShrinkHeader &&
+ bi->blockState == YAFFS_BLOCK_STATE_FULL) {
+ yaffs_BlockBecameDirty(dev, blk);
}
-#else
- if(in->inUse <= 0)
- {
- immediateDeletion = 1;
- }
-#endif
- if(immediateDeletion)
- {
- retVal = yaffs_ChangeObjectName(in, in->myDev->deletedDir,NULL,0);
- T(YAFFS_TRACE_TRACING,(TSTR("yaffs: immediate deletion of file %d" TENDSTR),in->objectId));
- in->deleted=1;
- in->myDev->nDeletedFiles++;
- yaffs_SoftDeleteFile(in);
- }
- else
- {
- retVal = yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,NULL,0);
- }
-
}
- return retVal;
-#endif
-}
+ /* 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.
+ */
-int yaffs_DeleteFile(yaffs_Object *in)
-{
- int retVal = YAFFS_OK;
+ yaffs_HardlinkFixup(dev,hardList);
- if(in->nDataChunks > 0)
- {
- // Use soft deletion
- 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;
+ /* Handle the unlinked files. Since they were left in an unlinked state we should
+ * just delete them.
+ */
+ {
+ struct ylist_head *i;
+ struct ylist_head *n;
+
+ yaffs_Object *l;
+ /* Soft delete all the unlinked files */
+ ylist_for_each_safe(i, n,
+ &dev->unlinkedDir->variant.directoryVariant.
+ children) {
+ if (i) {
+ l = ylist_entry(i, yaffs_Object, siblings);
+ yaffs_DestroyObject(l);
+ }
+ }
}
- else
+
+ /* Fix up any shadowed objects */
{
- // 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);
+ struct yaffs_ShadowFixerStruct *fixer;
+ yaffs_Object *obj;
- return YAFFS_OK;
+ while(shadowFixerList){
+ fixer = shadowFixerList;
+ shadowFixerList = fixer->next;
+ /* Complete the rename transaction by deleting the shadowed object
+ * then setting the object header to unshadowed.
+ */
+ obj = yaffs_FindObjectByNumber(dev,fixer->shadowedId);
+ if(obj)
+ yaffs_DestroyObject(obj);
+
+ obj = yaffs_FindObjectByNumber(dev,fixer->objectId);
+ if(obj){
+ yaffs_UpdateObjectHeader(obj,NULL,1,0,0);
+ }
+
+ YFREE(fixer);
+ }
}
-}
-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);
+ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+
+ if(alloc_failed){
+ return YAFFS_FAIL;
}
- return YAFFS_FAIL;
+ T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
-}
-
-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.
- }
+ return YAFFS_OK;
}
-
-static int yaffs_UnlinkWorker(yaffs_Object *obj)
+static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
{
+ __u8 *chunkData;
+ yaffs_ObjectHeader *oh;
+ yaffs_Device *dev;
+ yaffs_ExtendedTags tags;
+ int result;
+ int alloc_failed = 0;
-
- if(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);
+ if(!in)
+ return;
- retVal = yaffs_ChangeObjectName(obj, hl->parent, name,0);
+ dev = in->myDev;
- 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_HARDLINK:
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- default:
- return YAFFS_FAIL;
- }
- }
-}
-
-int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
-{
- yaffs_Object *obj;
-
- obj = yaffs_FindObjectByName(dir,name);
-
- if(obj && obj->unlinkAllowed)
- {
- return yaffs_UnlinkWorker(obj);
- }
-
- return YAFFS_FAIL;
-
-}
+#if 0
+ T(YAFFS_TRACE_SCAN,(TSTR("details for object %d %s loaded" TENDSTR),
+ in->objectId,
+ in->lazyLoaded ? "not yet" : "already"));
+#endif
-//////////////// Initialisation Scanning /////////////////
+ if(in->lazyLoaded && in->hdrChunk > 0){
+ in->lazyLoaded = 0;
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+ result = yaffs_ReadChunkWithTagsFromNAND(dev,in->hdrChunk,chunkData,&tags);
+ oh = (yaffs_ObjectHeader *) chunkData;
-#if 0
-// For now we use the SmartMedia check.
-// We look at the blockStatus byte in the first two chunks
-// These must be 0xFF to pass as OK.
-// todo: this function needs to be modifyable foir different NAND types
-// and different chunk sizes. Suggest make this into a per-device configurable
-// function.
-static int yaffs_IsBlockBad(yaffs_Device *dev, int blk)
-{
- yaffsExtendedTags *tags;
-
- yaffs_ReadChunkFromNAND(dev,blk * dev->nChunksPerBlock,NULL,&tags,1);
-#if 1
- if(yaffs_CountBits(spare.blockStatus) < 7)
- {
- return 1;
- }
+ in->yst_mode = oh->yst_mode;
+#ifdef CONFIG_YAFFS_WINCE
+ in->win_atime[0] = oh->win_atime[0];
+ in->win_ctime[0] = oh->win_ctime[0];
+ in->win_mtime[0] = oh->win_mtime[0];
+ in->win_atime[1] = oh->win_atime[1];
+ in->win_ctime[1] = oh->win_ctime[1];
+ in->win_mtime[1] = oh->win_mtime[1];
#else
- if(spare.blockStatus != 0xFF)
- {
- return 1;
- }
+ 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_ReadChunkFromNAND(dev,blk * dev->nChunksPerBlock + 1,NULL,&spare,1);
-
-#if 1
- if(yaffs_CountBits(spare.blockStatus) < 7)
- {
- return 1;
- }
-#else
- if(spare.blockStatus != 0xFF)
- {
- return 1;
+ 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__);
}
-#endif
-
- return 0;
-
}
-#endif
-
-
-typedef struct
-{
- int seq;
- int block;
-} yaffs_BlockIndex;
-
-
-
-static int yaffs_Scan(yaffs_Device *dev)
+static int yaffs_ScanBackwards(yaffs_Device * dev)
{
yaffs_ExtendedTags tags;
int blk;
int startIterator;
int endIterator;
int nBlocksToScan = 0;
-
+
int chunk;
+ int result;
int c;
int deleted;
yaffs_BlockState state;
yaffs_Object *hardList = NULL;
- yaffs_Object *hl;
yaffs_BlockInfo *bi;
- int sequenceNumber;
+ __u32 sequenceNumber;
yaffs_ObjectHeader *oh;
yaffs_Object *in;
yaffs_Object *parent;
- int nBlocks = dev->endBlock - dev->startBlock + 1;
-
+ 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));
+
- T(YAFFS_TRACE_SCAN,(TSTR("yaffs_Scan starts startblk %d endblk %d..." TENDSTR),dev->startBlock,dev->endBlock));
-
- chunkData = yaffs_GetTempBuffer(dev,__LINE__);
-
-
dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
+
+ blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
- if(dev->isYaffs2)
- {
- 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;
+ }
- // Scan all the blocks to determine their state
- for(blk = dev->startBlock; blk <= dev->endBlock; blk++)
- {
- bi = yaffs_GetBlockInfo(dev,blk);
- yaffs_ClearChunkBits(dev,blk);
+ 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);
-
+
+ yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
+
bi->blockState = state;
- bi->sequenceNumber = sequenceNumber;
+ 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));
- 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)));
+ 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)
- {
-
+ } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+
+ /* Determine the highest sequence number */
+ if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
+ sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
+
blockIndex[nBlocksToScan].seq = sequenceNumber;
blockIndex[nBlocksToScan].block = blk;
-
+
nBlocksToScan++;
- if(sequenceNumber >= dev->sequenceNumber)
- {
- dev->sequenceNumber = sequenceNumber;
+ 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));
+ } else {
+ /* 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)
+
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
+
+
+
+ YYIELD();
+
+ /* Sort the blocks */
+#ifndef CONFIG_YAFFS_USE_OWN_SORT
{
+ /* Use qsort now. */
+ yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
+ }
+#else
+ {
+ /* Dungy old bubble sort... */
+
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->startBlock;
- endIterator = dev->endBlock;
+
+ 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;
+ }
}
-
- for(blockIterator = startIterator; blockIterator <= endIterator; blockIterator++)
- {
-
- if(dev->isYaffs2)
- {
- // get the block to scan in the correct order
- blk = blockIndex[blockIterator].block;
- }
- else
- {
- blk = blockIterator;
- }
+#endif
+ YYIELD();
- bi = yaffs_GetBlockInfo(dev,blk);
- state = bi->blockState;
+ 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);
- deleted = 0;
- for(c = 0; c < dev->nChunksPerBlock &&
- state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++)
- {
- // Read the tags and decide what to do
- chunk = blk * dev->nChunksPerBlock + c;
-
- yaffs_ReadChunkWithTagsFromNAND(dev,chunk,NULL,&tags);
+ state = bi->blockState;
- // Let's have a good look at this chunk...
-
+ 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
+ */
- if(!dev->isYaffs2 && tags.chunkDeleted)
- {
- // 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)
+ 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)
{
- // We're looking at the first chunk in the block so the block is unused
+ /* 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
- {
- // 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));
+ } else {
+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+ state == YAFFS_BLOCK_STATE_ALLOCATING) {
+ if(dev->sequenceNumber == bi->sequenceNumber) {
+ /* this is the block being allocated from */
+
+ T(YAFFS_TRACE_SCAN,
+ (TSTR
+ (" Allocating from %d %d"
+ TENDSTR), blk, c));
+
+ state = YAFFS_BLOCK_STATE_ALLOCATING;
+ dev->allocationBlock = blk;
+ dev->allocationPage = c;
+ dev->allocationBlockFinder = blk;
+ }
+ else {
+ /* This is a partially written block that is not
+ * the current allocation block. This block must have
+ * had a write failure, so set up for retirement.
+ */
+
+ /* bi->needsRetiring = 1; ??? TODO */
+ bi->gcPrioritise = 1;
+
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("Partially written block %d detected" TENDSTR),
+ blk));
+ }
+
}
+
}
- dev->nFreeChunks += (dev->nChunksPerBlock - c);
- }
- else if(tags.chunkId > 0)
- {
- int endpos;
- // A data chunk.
- yaffs_SetChunkBit(dev,blk,c);
- bi->pagesInUse++;
+ 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;
- in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,YAFFS_OBJECT_TYPE_FILE);
- // PutChunkIntoFIle checks for a clash (two data chunks with
- // the same chunkId).
- yaffs_PutChunkIntoFile(in,tags.chunkId,chunk,1);
- endpos = (tags.chunkId - 1)* dev->nBytesPerChunk + tags.byteCount;
- if(in->variant.fileVariant.scannedFileSize <endpos)
- {
- in->variant.fileVariant.scannedFileSize = endpos;
- if(!dev->useHeaderFileSize)
- {
- in->variant.fileVariant.fileSize =
- in->variant.fileVariant.scannedFileSize;
+ 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__);
+
}
- //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);
+ } 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++;
-
- yaffs_ReadChunkWithTagsFromNAND(dev,chunk,chunkData,NULL);
-
- oh = (yaffs_ObjectHeader *)chunkData;
-
- in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,oh->type);
-
- if(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;
+
+ 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( dev->isYaffs2 ||
- ((existingSerial+1) & 3) == newSerial)
- {
- // Use new one - destroy the exisiting one
- yaffs_DeleteChunk(dev,in->chunkId,1,__LINE__);
- in->valid = 0;
+ if(dev->inbandTags){
+ /* Fix up the header if they got corrupted by inband tags */
+ oh->shadowsObject = oh->inbandShadowsObject;
+ oh->isShrink = oh->inbandIsShrink;
}
- else
- {
- // Use existing - destroy this one.
- yaffs_DeleteChunk(dev,chunk,1,__LINE__);
+
+ 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;
+
+
+ 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
+
+ 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;
- in->variantType = oh->type;
-
- in->st_mode = oh->st_mode;
+
+ 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];
+ 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->st_uid = oh->st_uid;
- in->st_gid = oh->st_gid;
- in->st_atime = oh->st_atime;
- in->st_mtime = oh->st_mtime;
- in->st_ctime = oh->st_ctime;
- in->st_rdev = oh->st_rdev;
+ 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 {
+ in->variantType = tags.extraObjectType;
+ in->lazyLoaded = 1;
+ }
+
+ in->hdrChunk = chunk;
+
+ } else if (!in->valid) {
+ /* we need to load this info */
- }
- else if(!in->valid)
- {
- // we need to load this info
-
in->valid = 1;
- in->variantType = oh->type;
-
- in->st_mode = oh->st_mode;
+ in->hdrChunk = chunk;
+
+ if(oh) {
+ in->variantType = oh->type;
+
+ in->yst_mode = oh->yst_mode;
#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
+ 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->st_uid = oh->st_uid;
- in->st_gid = oh->st_gid;
- in->st_atime = oh->st_atime;
- in->st_mtime = oh->st_mtime;
- in->st_ctime = oh->st_ctime;
- in->st_rdev = oh->st_rdev;
+ 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
+ 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;
- 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);
+ 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;
- 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)
+ 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;
+ YINIT_LIST_HEAD(&parent->variant.
+ directoryVariant.
+ children);
+ } else if (parent->variantType !=
+ YAFFS_OBJECT_TYPE_DIRECTORY)
{
- 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: // Do nothing
- in->variant.symLinkVariant.alias = yaffs_CloneString(oh->alias);
- break;
+ /* 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;
}
- if(parent == dev->deletedDir)
- {
- yaffs_DestroyObject(in);
+ yaffs_AddObjectToDirectory(parent, in);
+
+ itsUnlinked = (parent == dev->deletedDir) ||
+ (parent == dev->unlinkedDir);
+
+ if (isShrink) {
+ /* Mark the block as having a shrinkHeader */
bi->hasShrinkHeader = 1;
}
- //T((" %d %d header %d \"%s\" type %d\n",blk,c,tags.objectId,oh->name,in->variantType));
+
+ /* 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 ylist_head *) hardList;
+ hardList = in;
+ }
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ if(oh){
+ in->variant.symLinkVariant.alias =
+ yaffs_CloneString(oh->
+ alias);
+ if(!in->variant.symLinkVariant.alias)
+ alloc_failed = 1;
+ }
+ break;
+ }
+
}
+
}
+
+ } /* End of scanning for each chunk */
+
+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+ /* If we got this far while scanning, then the block is fully allocated. */
+ state = YAFFS_BLOCK_STATE_FULL;
}
-
- 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);
- }
+
+ /* 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)
- {
+
+ 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.
- 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);
+ /* 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 ylist_head *i;
+ struct ylist_head *n;
+
+ yaffs_Object *l;
+
+ /* Soft delete all the unlinked files */
+ ylist_for_each_safe(i, n,
+ &dev->unlinkedDir->variant.directoryVariant.
+ children) {
+ if (i) {
+ l = ylist_entry(i, yaffs_Object, siblings);
+ yaffs_DestroyObject(l);
+ }
+ }
+
+ /* Soft delete all the deletedDir files */
+ ylist_for_each_safe(i, n,
+ &dev->deletedDir->variant.directoryVariant.
+ children) {
+ if (i) {
+ l = ylist_entry(i, yaffs_Object, siblings);
+ yaffs_DestroyObject(l);
+
+ }
}
- 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);
-
- }
-
}
+
+ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
- {
- 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);
- if(l->deleted)
- {
- yaffs_DestroyObject(l);
- }
- }
- }
+ if(alloc_failed){
+ return YAFFS_FAIL;
}
-
- yaffs_ReleaseTempBuffer(dev,chunkData,__LINE__);
- T(YAFFS_TRACE_SCAN,(TSTR("yaffs_Scan ends" TENDSTR)));
+ T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
return YAFFS_OK;
}
+/*------------------------------ Directory Functions ----------------------------- */
+static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
+{
+ struct ylist_head *lh;
+ yaffs_Object *listObj;
+
+ int count = 0;
+
+ if(!obj)
+ YBUG();
+
+ if(yaffs_SkipVerification(obj->myDev))
+ return;
-////////////////////////// Directory Functions /////////////////////////
+ if(!obj->parent)
+ YBUG();
+
+ if(obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
+
+ /* Iterate through the objects in each hash entry */
+
+ ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
+ if (lh) {
+ listObj = ylist_entry(lh, yaffs_Object, siblings);
+ yaffs_VerifyObject(listObj);
+ if(obj == listObj)
+ count ++;
+ }
+ }
+
+ if(count != 1)
+ YBUG();
+
+}
-static void yaffs_AddObjectToDirectory(yaffs_Object *directory, yaffs_Object *obj)
+static void yaffs_VerifyDirectory(yaffs_Object *directory)
{
- if(obj->siblings.prev == NULL)
- {
- // Not initialised
- INIT_LIST_HEAD(&obj->siblings);
+ struct ylist_head *lh;
+ yaffs_Object *listObj;
+
+ if(!directory)
+ YBUG();
+
+ if(yaffs_SkipVerification(directory->myDev))
+ return;
+
+ if(directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
+
+ /* Iterate through the objects in each hash entry */
+
+ ylist_for_each(lh, &directory->variant.directoryVariant.children) {
+ if (lh) {
+ listObj = ylist_entry(lh, yaffs_Object, siblings);
+ if(listObj->parent != directory)
+ YBUG();
+ yaffs_VerifyObjectInDirectory(listObj);
+ }
+ }
+
+}
+
+
+static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj)
+{
+ yaffs_Device *dev = obj->myDev;
+ yaffs_Object *parent;
+
+ yaffs_VerifyObjectInDirectory(obj);
+ parent = obj->parent;
+
+ yaffs_VerifyDirectory(parent);
+
+ if(dev && dev->removeObjectCallback)
+ dev->removeObjectCallback(obj);
+
+
+ ylist_del_init(&obj->siblings);
+ obj->parent = NULL;
+
+ yaffs_VerifyDirectory(parent);
+
+}
+
+
+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();
}
- else if(!list_empty(&obj->siblings))
- {
- // If it is holed up somewhere else, un hook it
- list_del_init(&obj->siblings);
+ if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+ ("tragedy: Trying to add an object to a non-directory"
+ TENDSTR)));
+ YBUG();
}
- // Now add it
- list_add(&obj->siblings,&directory->variant.directoryVariant.children);
- obj->parent = directory;
-
- if(directory == obj->myDev->unlinkedDir || directory == obj->myDev->deletedDir)
- {
+
+ if (obj->siblings.prev == NULL) {
+ /* Not initialised */
+ YBUG();
+
+ } else if (ylist_empty(&obj->siblings)) {
+ YBUG();
+ }
+
+
+ yaffs_VerifyDirectory(directory);
+
+ yaffs_RemoveObjectFromDirectory(obj);
+
+
+ /* Now add it */
+ ylist_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;
}
-}
-static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
-{
- list_del_init(&obj->siblings);
- obj->parent = NULL;
+ yaffs_VerifyDirectory(directory);
+ yaffs_VerifyObjectInDirectory(obj);
+
+
}
-yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,const YCHAR *name)
+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;
-
- sum = yaffs_CalcNameSum(name);
-
- list_for_each(i,&directory->variant.directoryVariant.children)
- {
- if(i)
- {
- l = list_entry(i, yaffs_Object,siblings);
-
- // Special case for lost-n-found
- if(l->objectId == YAFFS_OBJECTID_LOSTNFOUND)
- {
- if(yaffs_strcmp(name,YAFFS_LOSTNFOUND_NAME) == 0)
- {
+ int sum;
+
+ struct ylist_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);
+
+ ylist_for_each(i, &directory->variant.directoryVariant.children) {
+ if (i) {
+ l = ylist_entry(i, yaffs_Object, siblings);
+
+ if(l->parent != directory)
+ YBUG();
+
+ 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_strcmp(name,buffer) == 0)
- {
+ } else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0){
+ /* LostnFound chunk 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;
}
-int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,int (*fn)(yaffs_Object *))
+#if 0
+int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir,
+ int (*fn) (yaffs_Object *))
{
- struct list_head *i;
- yaffs_Object *l;
-
-
- list_for_each(i,&theDir->variant.directoryVariant.children)
- {
- if(i)
- {
- l = list_entry(i, yaffs_Object,siblings);
- if(l && !fn(l))
- {
- return YAFFS_FAIL;
- }
+ struct ylist_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();
+ }
+
+ ylist_for_each(i, &theDir->variant.directoryVariant.children) {
+ if (i) {
+ l = ylist_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.
+ */
-// GetEquivalentObject dereferences any hard links to get to the
-// actual object.
-
-yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj)
+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
+ 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)
+int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize)
{
- memset(name,0,buffSize * sizeof(YCHAR));
+ memset(name, 0, buffSize * sizeof(YCHAR));
- if(obj->objectId == YAFFS_OBJECTID_LOSTNFOUND)
- {
- yaffs_strncpy(name,YAFFS_LOSTNFOUND_NAME,buffSize - 1);
- }
- else if(obj->chunkId <= 0)
- {
+ yaffs_CheckObjectDetailsLoaded(obj);
+
+ if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
+ yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
+ } else if (obj->hdrChunk <= 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);
+ YCHAR numString[20];
+ YCHAR *x = &numString[19];
+ unsigned v = obj->objectId;
+ numString[19] = 0;
+ while(v>0){
+ x--;
+ *x = '0' + (v % 10);
+ v /= 10;
+ }
+ /* make up a name */
+ yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
+ yaffs_strcat(locName,x);
+ yaffs_strncpy(name, locName, buffSize - 1);
}
#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
- else if(obj->shortName[0])
- {
- yaffs_strcpy(name,obj->shortName);
+ else if (obj->shortName[0]) {
+ yaffs_strcpy(name, obj->shortName);
}
#endif
- else
- {
- __u8 *buffer = yaffs_GetTempBuffer(obj->myDev,__LINE__);
-
- yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)buffer;
+ else {
+ int result;
+ __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
- memset(buffer,0,obj->myDev->nBytesPerChunk);
-
- if(obj->chunkId >= 0)
- {
- yaffs_ReadChunkWithTagsFromNAND(obj->myDev,obj->chunkId,buffer,NULL);
+ yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer;
+
+ memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
+
+ if (obj->hdrChunk > 0) {
+ result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
+ obj->hdrChunk, buffer,
+ NULL);
}
- yaffs_strncpy(name,oh->name,buffSize - 1);
+ yaffs_strncpy(name, oh->name, buffSize - 1);
- yaffs_ReleaseTempBuffer(obj->myDev,buffer,__LINE__);
+ yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
}
-
+
return yaffs_strlen(name);
}
-int yaffs_GetObjectFileLength(yaffs_Object *obj)
+int yaffs_GetObjectFileLength(yaffs_Object * obj)
{
-
- // Dereference any hard linking
- obj = yaffs_GetEquivalentObject(obj);
-
- if(obj->variantType == YAFFS_OBJECT_TYPE_FILE)
- {
+
+ /* 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)
- {
+ 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;
}
- else
- {
- // Only a directory should drop through to here
- return obj->myDev->nBytesPerChunk;
- }
}
-int yaffs_GetObjectLinkCount(yaffs_Object *obj)
+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 count = 0;
+ struct ylist_head *i;
+
+ if (!obj->unlinked) {
+ count++; /* the object itself */
+ }
+ ylist_for_each(i, &obj->hardLinks) {
+ count++; /* add the hard links; */
+ }
+ return count;
+}
-int yaffs_GetObjectInode(yaffs_Object *obj)
+int yaffs_GetObjectInode(yaffs_Object * obj)
{
obj = yaffs_GetEquivalentObject(obj);
-
+
return obj->objectId;
}
-unsigned yaffs_GetObjectType(yaffs_Object *obj)
+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->st_mode)) return DT_FIFO;
- if(S_ISCHR(obj->st_mode)) return DT_CHR;
- if(S_ISBLK(obj->st_mode)) return DT_BLK;
- if(S_ISSOCK(obj->st_mode)) return DT_SOCK;
- default: return DT_REG; break;
- }
-}
-YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *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)
- {
+ if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
return yaffs_CloneString(obj->variant.symLinkVariant.alias);
- }
- else
- {
+ } else {
return yaffs_CloneString(_Y(""));
}
}
#ifndef CONFIG_YAFFS_WINCE
-int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
+int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr)
{
unsigned int valid = attr->ia_valid;
-
- if(valid & ATTR_MODE) obj->st_mode = attr->ia_mode;
- if(valid & ATTR_UID) obj->st_uid = attr->ia_uid;
- if(valid & ATTR_GID) obj->st_gid = attr->ia_gid;
-
- if(valid & ATTR_ATIME) obj->st_atime = Y_TIME_CONVERT(attr->ia_atime);
- if(valid & ATTR_CTIME) obj->st_ctime = Y_TIME_CONVERT(attr->ia_ctime);
- if(valid & ATTR_MTIME) obj->st_mtime = Y_TIME_CONVERT(attr->ia_mtime);
-
- if(valid & ATTR_SIZE) yaffs_ResizeFile(obj,attr->ia_size);
-
- yaffs_UpdateObjectHeader(obj,NULL,1,0);
-
+
+ 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)
+int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr)
{
unsigned int valid = 0;
-
- attr->ia_mode = obj->st_mode; valid |= ATTR_MODE;
- attr->ia_uid = obj->st_uid; valid |= ATTR_UID;
- attr->ia_gid = obj->st_gid; valid |= ATTR_GID;
-
- Y_TIME_CONVERT(attr->ia_atime)= obj->st_atime; valid |= ATTR_ATIME;
- Y_TIME_CONVERT(attr->ia_ctime) = obj->st_ctime; valid |= ATTR_CTIME;
- Y_TIME_CONVERT(attr->ia_mtime) = obj->st_mtime; valid |= ATTR_MTIME;
- attr->ia_size = yaffs_GetFileSize(obj); valid |= ATTR_SIZE;
-
+ 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
-int yaffs_DumpObject(yaffs_Object *obj)
+#if 0
+int yaffs_DumpObject(yaffs_Object * obj)
{
-// __u8 buffer[YAFFS_BYTES_PER_CHUNK];
YCHAR name[257];
-// yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)buffer;
-// memset(buffer,0,YAFFS_BYTES_PER_CHUNK);
-
-// if(obj->chunkId >= 0)
-// {
-// yaffs_ReadChunkFromNAND(obj->myDev,obj->chunkId,buffer,NULL);
-// }
-
- 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)));
+ 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->hdrChunk,
+ yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
-#if 0
- YPRINTF(("Object %d \"%s\"\n dirty %d valid %d serial %d sum %d chunk %d\n",
- obj->objectId, oh->name, obj->dirty, obj->valid, obj->serial,
- obj->sum, obj->chunkId));
- switch(obj->variantType)
- {
- case YAFFS_OBJECT_TYPE_FILE:
- YPRINTF((" FILE length %d\n",obj->variant.fileVariant.fileSize));
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- YPRINTF((" DIRECTORY\n"));
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK: //todo
- case YAFFS_OBJECT_TYPE_SYMLINK:
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- default:
- }
-#endif
-
return YAFFS_OK;
}
+#endif
+/*---------------------------- Initialisation code -------------------------------------- */
-///////////////////////// Initialisation code ///////////////////////////
-
-
-int yaffs_CheckDevFunctions(const yaffs_Device *dev)
+static int yaffs_CheckDevFunctions(const yaffs_Device * dev)
{
- // Common functions, gotta have
- if(!dev->eraseBlockInNAND ||
- !dev->initialiseNAND) return 0;
+ /* 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;
+ /* 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;
+ /* 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
+ return 0; /* bad */
}
-int yaffs_GutsInitialise(yaffs_Device *dev)
+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;
- int extraBits;
- int nBlocks;
- T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
- // Check stuff that must be set
+ T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
- if(!dev)
- {
- T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Need a device" TENDSTR)));
+ /* Check stuff that must be set */
+
+ if (!dev) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR)));
return YAFFS_FAIL;
}
- // Check geometry parameters.
-
- if( (dev->isYaffs2 && dev->nBytesPerChunk <1024) ||
- (!dev->isYaffs2 && dev->nBytesPerChunk !=512) ||
- dev->nChunksPerBlock < 2 ||
- dev->nReservedBlocks < 2 ||
- dev->startBlock <= 0 ||
- dev->endBlock <= 0 ||
- dev->endBlock <= (dev->startBlock + 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->nBytesPerChunk, dev->isYaffs2 ? "2" : ""));
+ dev->internalStartBlock = dev->startBlock;
+ dev->internalEndBlock = dev->endBlock;
+ dev->blockOffset = 0;
+ dev->chunkOffset = 0;
+ dev->nFreeChunks = 0;
+
+ dev->gcBlock = -1;
+
+ 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->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
+ (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
+ (dev->inbandTags && !dev->isYaffs2 ) ||
+ 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, inbandTags %d "
+ TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
return YAFFS_FAIL;
}
- if(yaffs_InitialiseNAND(dev) != YAFFS_OK)
- {
- T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
+ if (yaffs_InitialiseNAND(dev) != YAFFS_OK) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
return YAFFS_FAIL;
}
+
+ /* Sort out space for inband tags, if required */
+ if(dev->inbandTags)
+ dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
+ else
+ dev->nDataBytesPerChunk = dev->totalBytesPerChunk;
- // 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)));
+ /* 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)));
+ /* 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)));
+ 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.
- //
+ /* Finished with most checks. One or two more checks happen later on too. */
dev->isMounted = 1;
-
- nBlocks = dev->endBlock - dev->startBlock + 1;
-
-
-
- // OK now calculate a few things for the device
- // Calculate chunkGroupBits.
- // We need to find the next power of 2 > than endBlock
-
- x = dev->nChunksPerBlock * (dev->endBlock+1);
-
- for(bits = extraBits = 0; x > 1; bits++)
- {
- if(x & 1) extraBits++;
- x >>= 1;
+ /* OK now calculate a few things for the device */
+
+ /*
+ * Calculate all the chunk size manipulation numbers:
+ */
+ x = dev->nDataBytesPerChunk;
+ /* We always use dev->chunkShift and dev->chunkDiv */
+ dev->chunkShift = Shifts(x);
+ x >>= dev->chunkShift;
+ dev->chunkDiv = x;
+ /* We only use chunk mask if chunkDiv is 1 */
+ dev->chunkMask = (1<<dev->chunkShift) - 1;
+
+ /*
+ * 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;
}
-
- if(extraBits > 0) bits++;
-
-
- // Level0 Tnodes are 16 bits, 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 <= 16)
- {
+ 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 - 16;
- }
-
+ 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)));
-
+ 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
+ /* 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->nBackgroundDeletions = 0;
dev->nUnlinkedFiles = 0;
- dev->eccFixed=0;
- dev->eccUnfixed=0;
- dev->tagsEccFixed=0;
- dev->tagsEccUnfixed=0;
+ dev->eccFixed = 0;
+ dev->eccUnfixed = 0;
+ dev->tagsEccFixed = 0;
+ dev->tagsEccUnfixed = 0;
dev->nErasureFailures = 0;
-
- //dev->localBuffer = YMALLOC(dev->nBytesPerChunk);
- // Initialise temporary buffers
- {
- int i;
- for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
- {
- dev->tempBuffer[i].line = 0; // not in use
- dev->tempBuffer[i].buffer = YMALLOC(dev->nBytesPerChunk);
- }
- }
-
+ 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;
- yaffs_InitialiseBlocks(dev,nBlocks);
-
- yaffs_InitialiseTnodes(dev);
-
- yaffs_InitialiseObjects(dev);
+ dev->srCache = NULL;
+ dev->gcCleanupList = NULL;
- dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
- if(dev->nShortOpCaches > 0)
- {
+ if (!init_failed &&
+ dev->nShortOpCaches > 0) {
int i;
-
- if(dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
- {
+ void *buf;
+ int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
+
+ if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES) {
dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
}
+
+ dev->srCache = YMALLOC(srCacheBytes);
- dev->srCache = YMALLOC( dev->nShortOpCaches * sizeof(yaffs_ChunkCache));
-
- for(i=0; i < dev->nShortOpCaches; i++)
- {
+ buf = (__u8 *) dev->srCache;
+
+ 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 = YMALLOC(dev->nBytesPerChunk);
+ dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk);
}
+ if(!buf)
+ init_failed = 1;
+
dev->srLastUse = 0;
}
dev->cacheHits = 0;
-
- // Initialise the unlinked, root and lost and found directories
- dev->lostNFoundDir = dev->rootDir = dev->unlinkedDir = dev->deletedDir = NULL;
-
- dev->unlinkedDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_UNLINKED, S_IFDIR);
- dev->deletedDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_UNLINKED, S_IFDIR);
+ if(!init_failed){
+ dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
+ if(!dev->gcCleanupList)
+ init_failed = 1;
+ }
- 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);
- yaffs_AddObjectToDirectory(dev->rootDir,dev->lostNFoundDir);
-
- if(dev->isYaffs2)
- {
+ if (dev->isYaffs2) {
dev->useHeaderFileSize = 1;
}
+ if(!init_failed && !yaffs_InitialiseBlocks(dev))
+ init_failed = 1;
- // Now scan the flash.
- yaffs_Scan(dev);
-
- // Zero out stats
+ 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)) {
+ yaffs_CheckObjectDetailsLoaded(dev->rootDir);
+ 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->nPageWrites = 0;
dev->nBlockErasures = 0;
dev->nGCCopies = 0;
dev->nRetriedWrites = 0;
dev->nRetiredBlocks = 0;
- T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
+ 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)
+void yaffs_Deinitialise(yaffs_Device * dev)
{
- if(dev->isMounted)
- {
+ if (dev->isMounted) {
int i;
-
+
yaffs_DeinitialiseBlocks(dev);
yaffs_DeinitialiseTnodes(dev);
yaffs_DeinitialiseObjects(dev);
- if(dev->nShortOpCaches > 0)
- {
-
- for(i=0; i < dev->nShortOpCaches; i++)
- {
- YFREE(dev->srCache[i].data);
+ 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++)
- {
+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
YFREE(dev->tempBuffer[i].buffer);
}
-
- dev->isMounted = 0;
- }
-
-}
-#if 0
-int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
-{
- int nFree = dev->nFreeChunks - (dev->nChunksPerBlock * YAFFS_RESERVED_BLOCKS);
-
- struct list_head *i;
- yaffs_Object *l;
-
-
- // To the free chunks add the chunks that are in the deleted unlinked files.
- list_for_each(i,&dev->deletedDir->variant.directoryVariant.children)
- {
- l = list_entry(i, yaffs_Object,siblings);
- if(l->deleted)
- {
- nFree++;
- nFree += l->nDataChunks;
- }
+ dev->isMounted = 0;
+
+ if(dev->deinitialiseNAND)
+ dev->deinitialiseNAND(dev);
}
-
-
- // printf("___________ nFreeChunks is %d nFree is %d\n",dev->nFreeChunks,nFree);
- if(nFree < 0) nFree = 0;
-
- return nFree;
-
}
-#endif
-
-int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
+static int yaffs_CountFreeChunks(yaffs_Device * dev)
{
int nFree;
- int pending;
int b;
- int nDirtyCacheChunks=0;
-
+
yaffs_BlockInfo *blk;
-
- struct list_head *i;
- yaffs_Object *l;
-
- for(nFree = 0, b = dev->startBlock; b <= dev->endBlock; b++)
- {
- blk = yaffs_GetBlockInfo(dev,b);
-
- switch(blk->blockState)
- {
- case YAFFS_BLOCK_STATE_EMPTY:
- case YAFFS_BLOCK_STATE_ALLOCATING:
- case YAFFS_BLOCK_STATE_FULL: nFree += (dev->nChunksPerBlock - blk->pagesInUse); break;
- default: break;
- }
- }
-
-
- pending = 0;
-
- // To the free chunks add the chunks that are in the deleted unlinked files.
- list_for_each(i,&dev->deletedDir->variant.directoryVariant.children)
- {
- if(i)
- {
- l = list_entry(i, yaffs_Object,siblings);
- if(l->deleted)
- {
- pending++;
- pending += l->nDataChunks;
- }
+
+ 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;
}
- }
-
-
-
- //printf("___________ really free is %d, pending %d, nFree is %d\n",nFree,pending, nFree+pending);
-
- if(nFree != dev->nFreeChunks)
- {
- // printf("___________Different! really free is %d, nFreeChunks %d\n",nFree dev->nFreeChunks);
+
}
- nFree += pending;
-
- // Now count the number of dirty chunks in the cache and subtract those
+ 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(i = 0; i < dev->nShortOpCaches; i++)
- {
- if(dev->srCache[i].dirty) nDirtyCacheChunks++;
+ for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
+ if (dev->srCache[i].dirty)
+ nDirtyCacheChunks++;
}
}
-
+
nFree -= nDirtyCacheChunks;
-
+
nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
- if(nFree < 0) nFree = 0;
+ /* Now we figure out how much to reserve for the checkpoint and report that... */
+ blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
+ if(blocksForCheckpoint < 0)
+ blocksForCheckpoint = 0;
+
+ nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
+
+ if (nFree < 0)
+ nFree = 0;
+
+ return nFree;
- 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 //////////////////////////////////
+/*---------------------------------------- YAFFS test code ----------------------*/
#define yaffs_CheckStruct(structure,syze, name) \
+ do { \
if(sizeof(structure) != syze) \
{ \
- T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),name,syze,sizeof(structure))); \
+ T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),\
+ name,syze,sizeof(structure))); \
return YAFFS_FAIL; \
- }
-
-
+ } \
+ } while(0)
+
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")
+/* 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")
+ yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode");
#endif
- yaffs_CheckStruct(yaffs_ObjectHeader,512,"yaffs_ObjectHeader")
-
-
- return YAFFS_OK;
-}
-
-#if 0
-void yaffs_GutsTest(yaffs_Device *dev)
-{
-
- if(yaffs_CheckStructures() != YAFFS_OK)
- {
- T(YAFFS_TRACE_ALWAYS,(TSTR("One or more structures malformed-- aborting\n" TENDSTR)));
- return;
- }
-
- yaffs_TnodeTest(dev);
- yaffs_ObjectTest(dev);
-}
+#ifndef CONFIG_YAFFS_WINCE
+ yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");
#endif
-
-
+ return YAFFS_OK;
+}
projects / yaffs2.git / blobdiff