/*
- * 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.
- *
*/
const char *yaffs_guts_c_version =
- "$Id: yaffs_guts.c,v 1.20 2005-10-07 02:46:49 charles Exp $";
+ "$Id: yaffs_guts.c,v 1.119 2010-03-12 02:48:34 charles Exp $";
#include "yportenv.h"
+#include "yaffs_trace.h"
#include "yaffsinterface.h"
#include "yaffs_guts.h"
#include "yaffs_tagsvalidity.h"
+#include "yaffs_getblockinfo.h"
#include "yaffs_tagscompat.h"
-
-#ifdef CONFIG_YAFFS_WINCE
-void yfsd_LockYAFFS(BOOL fsLockOnly);
-void yfsd_UnlockYAFFS(BOOL fsLockOnly);
+#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"
+
#define YAFFS_PASSIVE_GC_CHUNKS 2
+#define YAFFS_SMALL_HOLE_THRESHOLD 3
#include "yaffs_ecc.h"
-/* 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);
+
/* Robustification (if it ever comes about...) */
-static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND);
-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 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_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 void yaffs_UpdateParent(yaffs_Object *obj);
+static int yaffs_UnlinkObject(yaffs_Object *obj);
+static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
+
+static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
+
+static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev,
+ const __u8 *buffer,
+ yaffs_ExtendedTags *tags,
+ int useReserve);
+static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
+ int chunkInNAND, int inScan);
+
+static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
+ yaffs_ObjectType type);
+static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
+ yaffs_Object *obj);
+static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
+ int force, int isShrink, int shadows);
+static 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);
+ int chunkInNAND);
-static int yaffs_UnlinkWorker(yaffs_Object * obj);
-static void yaffs_DestroyObject(yaffs_Object * obj);
+static int yaffs_UnlinkWorker(yaffs_Object *obj);
-static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId,
- int chunkInObject);
+static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
+ int chunkInObject);
-loff_t yaffs_GetFileSize(yaffs_Object * obj);
+static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
+ yaffs_BlockInfo **blockUsedPtr);
-static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve);
+static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
-static void yaffs_VerifyFreeChunks(yaffs_Device * dev);
+static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
+static void yaffs_VerifyDirectory(yaffs_Object *directory);
#ifdef YAFFS_PARANOID
-static int yaffs_CheckFileSanity(yaffs_Object * in);
+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);
-/*
- * Start of real code.
- */
+static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
-/*
- * NAND access layer
- */
-
+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)
-{
- chunkInNAND -= dev->chunkOffset;
+static int yaffs_HandleHole(yaffs_Object *obj, loff_t newSize);
+static void yaffs_SkipRestOfBlock(yaffs_Device *dev);
+static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
+ int chunkInNAND,
+ const __u8 *data,
+ yaffs_ExtendedTags *tags);
- if (dev->readChunkWithTagsFromNAND)
- return dev->readChunkWithTagsFromNAND(dev, chunkInNAND, buffer,
- tags);
- else
- return yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
- chunkInNAND,
- buffer,
- tags);
-}
+/* Function to calculate chunk and offset */
-static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
- int chunkInNAND,
- const __u8 * buffer,
- yaffs_ExtendedTags * tags)
+static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut,
+ __u32 *offsetOut)
{
- chunkInNAND -= dev->chunkOffset;
+ int chunk;
+ __u32 offset;
- if (tags) {
- 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));
+ chunk = (__u32)(addr >> dev->chunkShift);
+
+ if (dev->chunkDiv == 1) {
+ /* 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)
-{
- blockNo -= dev->blockOffset;
+/* 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.
+ */
- if (dev->markNANDBlockBad)
- return dev->markNANDBlockBad(dev, blockNo);
- else
- return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
-}
-static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device * dev,
- int blockNo,
- yaffs_BlockState * state,
- unsigned *sequenceNumber)
+static __u32 ShiftsGE(__u32 x)
{
- blockNo -= dev->blockOffset;
+ int extraBits;
+ int nShifts;
- if (dev->queryNANDBlock)
- return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
- else
- return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
- state,
- sequenceNumber);
+ nShifts = extraBits = 0;
+
+ while (x > 1) {
+ if (x & 1)
+ extraBits++;
+ x >>= 1;
+ nShifts++;
+ }
+
+ if (extraBits)
+ nShifts++;
+
+ return nShifts;
}
-static int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
- int blockInNAND)
+/* Function to return the number of shifts to get a 1 in bit 0
+ */
+
+static __u32 Shifts(__u32 x)
{
- int result;
+ int nShifts;
- blockInNAND -= dev->blockOffset;
+ nShifts = 0;
- dev->nBlockErasures++;
- result = dev->eraseBlockInNAND(dev, blockInNAND);
+ if (!x)
+ return 0;
- /* If at first we don't succeed, try again *once*.*/
- if (!result)
- result = dev->eraseBlockInNAND(dev, blockInNAND);
- return result;
-}
+ while (!(x&1)) {
+ x >>= 1;
+ nShifts++;
+ }
-static int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
-{
- return dev->initialiseNAND(dev);
+ return nShifts;
}
-/*
+
+
+/*
* Temporary buffer manipulations.
*/
-static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo)
+static int yaffs_InitialiseTempBuffers(yaffs_Device *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->param.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;
+
for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
if (dev->tempBuffer[i].line == 0) {
dev->tempBuffer[i].line = lineNo;
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++) {
+ 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)));
/*
*/
dev->unmanagedTempAllocations++;
- return YMALLOC(dev->nBytesPerChunk);
+ return YMALLOC(dev->nDataBytesPerChunk);
}
-static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer,
+void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer,
int lineNo)
{
int i;
+
+ dev->tempInUse--;
+
for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
if (dev->tempBuffer[i].buffer == buffer) {
dev->tempBuffer[i].line = 0;
}
+/*
+ * 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->param.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
*/
-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->internalStartBlock || blk > dev->internalEndBlock) {
T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
- blk));
+ (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
+ blk));
YBUG();
}
return dev->chunkBits +
- (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
+ (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->param.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);
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);
+ 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);
+ yaffs_VerifyChunkBitId(dev, blk, chunk);
+
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);
+ 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);
int i;
return 0;
}
-/*
- * Simple hash function. Needs to have a reasonable spread
- */
-
-static Y_INLINE int yaffs_HashFunction(int n)
+static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
{
- return (n % YAFFS_NOBJECT_BUCKETS);
+ __u8 *blkBits = yaffs_BlockBits(dev, blk);
+ int i;
+ int n = 0;
+ for (i = 0; i < dev->chunkBitmapStride; i++) {
+ __u8 x = *blkBits;
+ while (x) {
+ if (x & 1)
+ n++;
+ x >>= 1;
+ }
+
+ blkBits++;
+ }
+ return n;
}
/*
- * Access functions to useful fake objects
+ * Verification code
*/
-
-yaffs_Object *yaffs_Root(yaffs_Device * dev)
+
+static int yaffs_SkipVerification(yaffs_Device *dev)
{
- return dev->rootDir;
+ dev=dev;
+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
}
-yaffs_Object *yaffs_LostNFound(yaffs_Device * dev)
+static int yaffs_SkipFullVerification(yaffs_Device *dev)
{
- return dev->lostNFoundDir;
+ dev=dev;
+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
}
-
-/*
- * Erased NAND checking functions
- */
-
-int yaffs_CheckFF(__u8 * buffer, int nBytes)
+static int yaffs_SkipNANDVerification(yaffs_Device *dev)
{
- /* Horrible, slow implementation */
- while (nBytes--) {
- if (*buffer != 0xFF)
- return 0;
- buffer++;
- }
- return 1;
+ dev=dev;
+ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
}
-static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
- int chunkInNAND)
+static const char *blockStateName[] = {
+"Unknown",
+"Needs scanning",
+"Scanning",
+"Empty",
+"Allocating",
+"Full",
+"Dirty",
+"Checkpoint",
+"Collecting",
+"Dead"
+};
+
+static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
{
+ int actuallyUsed;
+ int inUse;
- int retval = YAFFS_OK;
- __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
- yaffs_ExtendedTags tags;
+ if (yaffs_SkipVerification(dev))
+ return;
- yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
+ /* Report illegal runtime states */
+ if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
- if (!yaffs_CheckFF(data, dev->nBytesPerChunk) || tags.chunkUsed) {
- T(YAFFS_TRACE_NANDACCESS,
- (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
- retval = YAFFS_FAIL;
+ switch (bi->blockState) {
+ case YAFFS_BLOCK_STATE_UNKNOWN:
+ case YAFFS_BLOCK_STATE_SCANNING:
+ case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
+ n, blockStateName[bi->blockState]));
}
- yaffs_ReleaseTempBuffer(dev, data, __LINE__);
+ /* Check pages in use and soft deletions are legal */
- return retval;
+ actuallyUsed = bi->pagesInUse - bi->softDeletions;
+
+ if (bi->pagesInUse < 0 || bi->pagesInUse > dev->param.nChunksPerBlock ||
+ bi->softDeletions < 0 || bi->softDeletions > dev->param.nChunksPerBlock ||
+ actuallyUsed < 0 || actuallyUsed > dev->param.nChunksPerBlock)
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
+ n, bi->pagesInUse, bi->softDeletions));
+
+ /* Check chunk bitmap legal */
+ inUse = yaffs_CountChunkBits(dev, n);
+ if (inUse != bi->pagesInUse)
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
+ n, bi->pagesInUse, inUse));
+
+ /* Check that the sequence number is valid.
+ * Ten million is legal, but is very unlikely
+ */
+ if (dev->param.isYaffs2 &&
+ (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
+ (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
+ n, bi->sequenceNumber));
}
-static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
- const __u8 * data,
- yaffs_ExtendedTags * tags,
- int useReserve)
+static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
+ int n)
{
- int chunk;
+ yaffs_VerifyBlock(dev, bi, n);
- int writeOk = 1;
- int attempts = 0;
+ /* After collection the block should be in the erased state */
+ /* This will need to change if we do partial gc */
- do {
- chunk = yaffs_AllocateChunk(dev, useReserve);
+ if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
+ bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
+ T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
+ n, bi->blockState));
+ }
+}
- if (chunk >= 0) {
+static void yaffs_VerifyBlocks(yaffs_Device *dev)
+{
+ int i;
+ int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
+ int nIllegalBlockStates = 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 (yaffs_SkipVerification(dev))
+ return;
- 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);
- } else {
- yaffs_HandleWriteChunkError(dev, chunk);
- }
- }
+ memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
- } while (chunk >= 0 && !writeOk);
+ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
+ yaffs_VerifyBlock(dev, bi, i);
- if (attempts > 1) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs write required %d attempts" TENDSTR),
- attempts));
- dev->nRetriedWrites += (attempts - 1);
+ if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
+ nBlocksPerState[bi->blockState]++;
+ else
+ nIllegalBlockStates++;
}
- return chunk;
-}
+ T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
+ T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
-/*
- * Block retiring for handling a broken block.
- */
-
-static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND)
-{
+ 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)));
- yaffs_MarkBlockBad(dev, blockInNAND);
+ for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("%s %d blocks"TENDSTR),
+ blockStateName[i], nBlocksPerState[i]));
- yaffs_GetBlockInfo(dev, blockInNAND)->blockState =
- YAFFS_BLOCK_STATE_DEAD;
+ 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)));
- dev->nRetiredBlocks++;
}
/*
- * Functions for robustisizing TODO
- *
+ * 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_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
- const __u8 * data,
- const yaffs_ExtendedTags * tags)
+static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
{
-}
+ if (obj && yaffs_SkipVerification(obj->myDev))
+ return;
-static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND,
- const yaffs_ExtendedTags * tags)
-{
-}
+ if (!(tags && obj && oh)) {
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Verifying object header tags %p obj %p oh %p"TENDSTR),
+ tags, obj, oh));
+ return;
+ }
-static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND)
-{
- int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
+ 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));
- /* Mark the block for retirement */
- yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1;
- /* Delete the chunk */
- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
-}
+ if (tags->objectId != obj->objectId)
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
+ tags->objectId, obj->objectId));
-/*---------------- Name handling functions ------------*/
+ /*
+ * Check that the object's parent ids match if parentCheck requested.
+ *
+ * Tests do not apply to the root object.
+ */
-static __u16 yaffs_CalcNameSum(const YCHAR * name)
-{
- __u16 sum = 0;
- __u16 i = 1;
+ 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));
- YUCHAR *bname = (YUCHAR *) name;
- if (bname) {
- while ((*bname) && (i <= YAFFS_MAX_NAME_LENGTH)) {
+ 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));
-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
- sum += yaffs_toupper(*bname) * i;
-#else
- sum += (*bname) * i;
-#endif
- i++;
- bname++;
- }
- }
- return sum;
-}
+ if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d header name is NULL"TENDSTR),
+ obj->objectId));
-static void yaffs_SetObjectName(yaffs_Object * obj, const YCHAR * name)
-{
-#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
- if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH) {
- yaffs_strcpy(obj->shortName, name);
- } else {
- obj->shortName[0] = _Y('\0');
- }
-#endif
- obj->sum = yaffs_CalcNameSum(name);
+ 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));
}
-/*-------------------- TNODES -------------------
- * List of spare tnodes
- * The list is hooked together using the first pointer
- * in the tnode.
- */
-
-/* yaffs_CreateTnodes creates a bunch more tnodes and
- * adds them to the tnode free list.
- * Don't use this function directly
- */
-static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes)
+static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
+ __u32 level, int chunkOffset)
{
int i;
- yaffs_Tnode *newTnodes;
- yaffs_TnodeList *tnl;
+ yaffs_Device *dev = obj->myDev;
+ int ok = 1;
- if (nTnodes < 1)
- return YAFFS_OK;
+ if (tn) {
+ if (level > 0) {
- /* make these things */
+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
+ if (tn->internal[i]) {
+ ok = yaffs_VerifyTnodeWorker(obj,
+ tn->internal[i],
+ level - 1,
+ (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
+ }
+ }
+ } else if (level == 0) {
+ yaffs_ExtendedTags tags;
+ __u32 objectId = obj->objectId;
- newTnodes = YMALLOC(nTnodes * sizeof(yaffs_Tnode));
+ chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
- if (!newTnodes) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
- return YAFFS_FAIL;
- }
+ for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
+ __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
- /* Hook them into the free list */
- for (i = 0; i < nTnodes - 1; i++) {
- newTnodes[i].internal[0] = &newTnodes[i + 1];
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
+ 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++;
+ }
+ }
}
- newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- dev->freeTnodes = newTnodes;
- dev->nFreeTnodes += nTnodes;
- dev->nTnodesCreated += nTnodes;
+ return ok;
- /* 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 {
- tnl->tnodes = newTnodes;
- tnl->next = dev->allocatedTnodeList;
- dev->allocatedTnodeList = tnl;
- }
- T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
+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;
- return YAFFS_OK;
-}
+ if (!obj)
+ return;
-/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
+ if (yaffs_SkipVerification(obj->myDev))
+ return;
-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device * dev)
-{
- yaffs_Tnode *tn = NULL;
+ dev = obj->myDev;
+ objectId = obj->objectId;
- /* If there are none left make more */
- if (!dev->freeTnodes) {
- yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
+ /* 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++;
}
- if (dev->freeTnodes) {
- tn = dev->freeTnodes;
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
- /* Hoosterman, this thing looks like it isn't in the list */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
- }
-#endif
- dev->freeTnodes = dev->freeTnodes->internal[0];
- dev->nFreeTnodes--;
- /* zero out */
- memset(tn, 0, sizeof(yaffs_Tnode));
- }
+ actualTallness = obj->variant.fileVariant.topLevel;
- return tn;
-}
+ /* 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.
+ */
-/* 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 (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));
+ }
+ }
}
- tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- tn->internal[0] = dev->freeTnodes;
- dev->freeTnodes = tn;
- dev->nFreeTnodes++;
}
}
-static void yaffs_DeinitialiseTnodes(yaffs_Device * dev)
-{
- /* Free the list of allocated tnodes */
- yaffs_TnodeList *tmp;
-
- while (dev->allocatedTnodeList) {
- tmp = dev->allocatedTnodeList->next;
-
- YFREE(dev->allocatedTnodeList->tnodes);
- YFREE(dev->allocatedTnodeList);
- dev->allocatedTnodeList = tmp;
- }
+static void yaffs_VerifyHardLink(yaffs_Object *obj)
+{
+ if (obj && yaffs_SkipVerification(obj->myDev))
+ return;
- dev->freeTnodes = NULL;
- dev->nFreeTnodes = 0;
+ /* Verify sane equivalent object */
}
-static void yaffs_InitialiseTnodes(yaffs_Device * dev)
+static void yaffs_VerifySymlink(yaffs_Object *obj)
{
- dev->allocatedTnodeList = NULL;
- dev->freeTnodes = NULL;
- dev->nFreeTnodes = 0;
- dev->nTnodesCreated = 0;
+ if (obj && yaffs_SkipVerification(obj->myDev))
+ return;
+ /* Verify symlink string */
}
-/* ------------------- 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.
- */
+static void yaffs_VerifySpecial(yaffs_Object *obj)
+{
+ if (obj && yaffs_SkipVerification(obj->myDev))
+ return;
+}
-/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev,
- yaffs_FileStructure * fStruct,
- __u32 chunkId)
+static void yaffs_VerifyObject(yaffs_Object *obj)
{
+ yaffs_Device *dev;
- yaffs_Tnode *tn = fStruct->top;
- __u32 i;
- int requiredTallness;
- int level = fStruct->topLevel;
+ __u32 chunkMin;
+ __u32 chunkMax;
- /* Check sane level and chunk Id */
- if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) {
- return NULL;
- }
+ __u32 chunkIdOk;
+ __u32 chunkInRange;
+ __u32 chunkShouldNotBeDeleted;
+ __u32 chunkValid;
- if (chunkId > YAFFS_MAX_CHUNK_ID) {
- return NULL;
- }
+ if (!obj)
+ return;
- /* First check we're tall enough (ie enough topLevel) */
+ if (obj->beingCreated)
+ return;
- i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
- requiredTallness = 0;
- while (i) {
- i >>= YAFFS_TNODES_INTERNAL_BITS;
- requiredTallness++;
- }
+ dev = obj->myDev;
- if (requiredTallness > fStruct->topLevel) {
- /* Not tall enough, so we can't find it, return NULL. */
- return NULL;
- }
+ if (yaffs_SkipVerification(dev))
+ return;
- /* 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--;
+ /* Check sane object header chunk */
- }
+ chunkMin = dev->internalStartBlock * dev->param.nChunksPerBlock;
+ chunkMax = (dev->internalEndBlock+1) * dev->param.nChunksPerBlock - 1;
- return tn;
-}
+ chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
+ chunkIdOk = chunkInRange || (obj->hdrChunk == 0);
+ chunkValid = chunkInRange &&
+ yaffs_CheckChunkBit(dev,
+ obj->hdrChunk / dev->param.nChunksPerBlock,
+ obj->hdrChunk % dev->param.nChunksPerBlock);
+ chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
-/* 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)
-{
+ if (!obj->fake &&
+ (!chunkIdOk || chunkShouldNotBeDeleted)) {
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
+ obj->objectId, obj->hdrChunk,
+ chunkIdOk ? "" : ",out of range",
+ chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
+ }
- yaffs_Tnode *tn;
+ if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
+ yaffs_ExtendedTags tags;
+ yaffs_ObjectHeader *oh;
+ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
- int requiredTallness;
- int i;
- int l;
+ oh = (yaffs_ObjectHeader *)buffer;
- __u32 x;
+ yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
+ &tags);
+ yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
- /* Check sane level and page Id */
- if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL) {
- return NULL;
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
}
- if (chunkId > YAFFS_MAX_CHUNK_ID) {
- return NULL;
+ /* 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));
}
- /* First check we're tall enough (ie enough topLevel) */
+ /* 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));
+ }
- x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
- requiredTallness = 0;
- while (x) {
- x >>= YAFFS_TNODES_INTERNAL_BITS;
- requiredTallness++;
+ 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 (requiredTallness > fStruct->topLevel) {
- /* Not tall enough,gotta make the tree taller */
- for (i = fStruct->topLevel; i < requiredTallness; i++) {
-
- tn = yaffs_GetTnode(dev);
+ if (yaffs_SkipVerification(dev))
+ return;
- if (tn) {
- tn->internal[0] = fStruct->top;
- fStruct->top = tn;
- } else {
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs: no more tnodes" TENDSTR)));
+ /* 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);
}
}
-
- fStruct->topLevel = requiredTallness;
}
+}
- /* Traverse down to level 0, adding anything we need */
- l = fStruct->topLevel;
- tn = fStruct->top;
- while (l > 0 && tn) {
- x = (chunkId >>
- ( YAFFS_TNODES_LEVEL0_BITS +
- (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
- YAFFS_TNODES_INTERNAL_MASK;
+/*
+ * 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;
+}
- if (!tn->internal[x])
- tn->internal[x] = yaffs_GetTnode(dev);
+yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
+{
+ return dev->lostNFoundDir;
+}
- tn = tn->internal[x];
- l--;
- }
+/*
+ * Erased NAND checking functions
+ */
- return tn;
+int yaffs_CheckFF(__u8 *buffer, int nBytes)
+{
+ /* Horrible, slow implementation */
+ while (nBytes--) {
+ if (*buffer != 0xFF)
+ return 0;
+ buffer++;
+ }
+ return 1;
}
-static int yaffs_FindChunkInGroup(yaffs_Device * dev, int theChunk,
- yaffs_ExtendedTags * tags, int objectId,
- int chunkInInode)
+static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
+ int chunkInNAND)
{
- int j;
+ int retval = YAFFS_OK;
+ __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
+ yaffs_ExtendedTags tags;
+ int result;
- 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;
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
- }
- }
- theChunk++;
+ 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;
}
- return -1;
-}
+ yaffs_ReleaseTempBuffer(dev, data, __LINE__);
-/* 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.
- */
+ return retval;
-static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level,
- int chunkOffset, int *limit)
-{
- int i;
- int chunkInInode;
- int theChunk;
- yaffs_ExtendedTags tags;
- int foundChunk;
- yaffs_Device *dev = in->myDev;
+}
- int allDone = 1;
- if (tn) {
- if (level > 0) {
+static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
+ int chunkInNAND,
+ const __u8 *data,
+ yaffs_ExtendedTags *tags)
+{
+ int retval = YAFFS_OK;
+ yaffs_ExtendedTags tempTags;
+ __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
+ int result;
+
+ result = yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND,buffer,&tempTags);
+ if(memcmp(buffer,data,dev->nDataBytesPerChunk) ||
+ tempTags.objectId != tags->objectId ||
+ tempTags.chunkId != tags->chunkId ||
+ tempTags.byteCount != tags->byteCount)
+ retval = YAFFS_FAIL;
- for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
- i--) {
- if (tn->internal[i]) {
- if (limit && (*limit) < 0) {
- allDone = 0;
- } else {
- allDone =
- yaffs_DeleteWorker(in,
- tn->
- internal
- [i],
- level -
- 1,
- (chunkOffset
- <<
- YAFFS_TNODES_INTERNAL_BITS)
- + i,
- limit);
- }
- if (allDone) {
- yaffs_FreeTnode(dev,
- tn->
- internal[i]);
- tn->internal[i] = NULL;
- }
- }
-
- }
- return (allDone) ? 1 : 0;
- } else if (level == 0) {
- int hitLimit = 0;
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
- for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
- i--) {
- if (tn->level0[i]) {
+ return retval;
+}
- chunkInInode =
- (chunkOffset <<
- YAFFS_TNODES_LEVEL0_BITS) + i;
+static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
+ const __u8 *data,
+ yaffs_ExtendedTags *tags,
+ int useReserve)
+{
+ int attempts = 0;
+ int writeOk = 0;
+ int chunk;
- theChunk =
- tn->level0[i] << dev->
- chunkGroupBits;
+ yaffs_InvalidateCheckpoint(dev);
- foundChunk =
- yaffs_FindChunkInGroup(dev,
- theChunk,
- &tags,
- in->objectId,
- chunkInInode);
+ do {
+ yaffs_BlockInfo *bi = 0;
+ int erasedOk = 0;
- if (foundChunk > 0) {
- yaffs_DeleteChunk(dev,
- foundChunk, 1,
- __LINE__);
- in->nDataChunks--;
- if (limit) {
- *limit = *limit - 1;
- if (*limit <= 0) {
- hitLimit = 1;
- }
- }
+ 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.
+ *
+ * Mods to the above
+ * If an erase check fails or the write fails we skip the
+ * rest of the block.
+ */
- tn->level0[i] = 0;
- }
+ /* 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));
+
+ /* If not erased, delete this one,
+ * skip rest of block and
+ * try another chunk */
+ yaffs_DeleteChunk(dev,chunk,1,__LINE__);
+ yaffs_SkipRestOfBlock(dev);
+ continue;
}
- return (i < 0) ? 1 : 0;
-
}
- }
+ writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
+ data, tags);
- return 1;
+ if(!bi->skipErasedCheck)
+ writeOk = yaffs_VerifyChunkWritten(dev, chunk, data, tags);
-}
+ if (writeOk != YAFFS_OK) {
+ /* Clean up aborted write, skip to next block and
+ * try another chunk */
+ yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
+ continue;
+ }
-static void yaffs_SoftDeleteChunk(yaffs_Device * dev, int chunk)
-{
+ bi->skipErasedCheck = 1;
- yaffs_BlockInfo *theBlock;
+ /* Copy the data into the robustification buffer */
+ yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
- T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
+ } while (writeOk != YAFFS_OK &&
+ (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
- theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock);
- if (theBlock) {
- theBlock->softDeletions++;
- dev->nFreeChunks++;
+ 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;
}
-/* 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.
+
+/*
+ * Oldest Dirty Sequence Number handling.
*/
-static int yaffs_SoftDeleteWorker(yaffs_Object * in, yaffs_Tnode * tn,
- __u32 level, int chunkOffset)
+/* yaffs_CalcOldestDirtySequence()
+ * yaffs_FindOldestDirtySequence()
+ * Calculate the oldest dirty sequence number if we don't know it.
+ */
+static int yaffs_CalcOldestDirtySequence(yaffs_Device *dev)
{
int i;
- int theChunk;
- int allDone = 1;
- yaffs_Device *dev = in->myDev;
+ __u32 seq;
+ yaffs_BlockInfo *b;
- if (tn) {
- if (level > 0) {
+ if(!dev->param.isYaffs2)
+ return 0;
- for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
- i--) {
- if (tn->internal[i]) {
- allDone =
- yaffs_SoftDeleteWorker(in,
- tn->
- internal[i],
- level - 1,
- (chunkOffset
- <<
- YAFFS_TNODES_INTERNAL_BITS)
- + i);
- if (allDone) {
- yaffs_FreeTnode(dev,
- tn->
- internal[i]);
- tn->internal[i] = NULL;
- } else {
- /* Hoosterman... how could this happen? */
- }
- }
- }
- return (allDone) ? 1 : 0;
- } else if (level == 0) {
+ /* Find the oldest dirty sequence number. */
+ seq = dev->sequenceNumber;
+ b = dev->blockInfo;
+ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+ if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
+ (b->pagesInUse - b->softDeletions) < dev->param.nChunksPerBlock &&
+ b->sequenceNumber < seq)
+ seq = b->sequenceNumber;
+ b++;
+ }
+ return seq;
+}
- 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 not larger than
- * a block.
- */
- theChunk =
- (tn->level0[i] << dev->
- chunkGroupBits);
- yaffs_SoftDeleteChunk(dev, theChunk);
- tn->level0[i] = 0;
- }
+static void yaffs_FindOldestDirtySequence(yaffs_Device *dev)
+{
+ if(dev->param.isYaffs2 && !dev->oldestDirtySequence)
+ dev->oldestDirtySequence =
+ yaffs_CalcOldestDirtySequence(dev);
- }
- return 1;
+#if 0
+ if(!yaffs_SkipVerification(dev) &&
+ dev->oldestDirtySequence != yaffs_CalcOldestDirtySequence(dev))
+ YBUG();
- }
+#endif
+}
- }
+/*
+ * yaffs_ClearOldestDirtySequence()
+ * Called when a block is erased or marked bad. (ie. when its sequenceNumber
+ * becomes invalid). If the value matches the oldest then we clear
+ * dev->oldestDirtySequence to force its recomputation.
+ */
+static void yaffs_ClearOldestDirtySequence(yaffs_Device *dev, yaffs_BlockInfo *bi)
+{
- return 1;
+ if(!dev->param.isYaffs2)
+ return;
+ if(!bi || bi->sequenceNumber == dev->oldestDirtySequence)
+ dev->oldestDirtySequence = 0;
}
-static void yaffs_SoftDeleteFile(yaffs_Object * obj)
+/*
+ * yaffs_UpdateOldestDirtySequence()
+ * Update the oldest dirty sequence number whenever we dirty a block.
+ * Only do this if the oldestDirtySequence is actually being tracked.
+ */
+static void yaffs_UpdateOldestDirtySequence(yaffs_Device *dev, yaffs_BlockInfo *bi)
{
- 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;
- }
+ if(dev->param.isYaffs2 && dev->oldestDirtySequence){
+ if(dev->oldestDirtySequence > bi->sequenceNumber)
+ dev->oldestDirtySequence = bi->sequenceNumber;
}
}
-
-/* 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.
+
+/*
+ * Block retiring for handling a broken block.
*/
-static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device * dev, yaffs_Tnode * tn,
- __u32 level, int del0)
+static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
{
- int i;
- int hasData;
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
- if (tn) {
- hasData = 0;
+ yaffs_InvalidateCheckpoint(dev);
+
+ yaffs_ClearOldestDirtySequence(dev,bi);
- 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 (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
+ if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR(
+ "yaffs: Failed to mark bad and erase block %d"
+ TENDSTR), blockInNAND));
+ } else {
+ yaffs_ExtendedTags tags;
+ int chunkId = blockInNAND * dev->param.nChunksPerBlock;
- if (tn->internal[i]) {
- hasData++;
- }
- }
+ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
- if (hasData == 0 && del0) {
- /* Free and return NULL */
+ memset(buffer, 0xff, dev->nDataBytesPerChunk);
+ yaffs_InitialiseTags(&tags);
+ tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
+ if (dev->param.writeChunkWithTagsToNAND(dev, chunkId -
+ dev->chunkOffset, buffer, &tags) != YAFFS_OK)
+ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
+ TCONT("write bad block marker to block %d")
+ TENDSTR), blockInNAND));
- yaffs_FreeTnode(dev, tn);
- tn = NULL;
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
}
-
}
- return tn;
+ bi->blockState = YAFFS_BLOCK_STATE_DEAD;
+ bi->gcPrioritise = 0;
+ bi->needsRetiring = 0;
+ dev->nRetiredBlocks++;
}
-static int yaffs_PruneFileStructure(yaffs_Device * dev,
- yaffs_FileStructure * fStruct)
-{
- int i;
- int hasData;
- int done = 0;
- yaffs_Tnode *tn;
+/*
+ * Functions for robustisizing TODO
+ *
+ */
- if (fStruct->topLevel > 0) {
- fStruct->top =
- yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
+static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
+ const __u8 *data,
+ const yaffs_ExtendedTags *tags)
+{
+ dev=dev;
+ chunkInNAND=chunkInNAND;
+ data=data;
+ tags=tags;
+}
- /* 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)
- */
+static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
+ const yaffs_ExtendedTags *tags)
+{
+ dev=dev;
+ chunkInNAND=chunkInNAND;
+ tags=tags;
+}
- while (fStruct->topLevel && !done) {
- tn = fStruct->top;
+void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
+{
+ if (!bi->gcPrioritise) {
+ bi->gcPrioritise = 1;
+ dev->hasPendingPrioritisedGCs = 1;
+ bi->chunkErrorStrikes++;
- hasData = 0;
- for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
- if (tn->internal[i]) {
- hasData++;
- }
- }
+ if (bi->chunkErrorStrikes > 3) {
+ bi->needsRetiring = 1; /* Too many stikes, so retire this */
+ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
- if (!hasData) {
- fStruct->top = tn->internal[0];
- fStruct->topLevel--;
- yaffs_FreeTnode(dev, tn);
- } else {
- done = 1;
- }
}
}
-
- return YAFFS_OK;
}
-/*-------------------- End of File Structure functions.-------------------*/
-
-/* yaffs_CreateFreeObjects creates a bunch more objects and
- * adds them to the object free list.
- */
-static int yaffs_CreateFreeObjects(yaffs_Device * dev, int nObjects)
+static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
+ int erasedOk)
{
- int i;
- yaffs_Object *newObjects;
- yaffs_ObjectList *list;
-
- if (nObjects < 1)
- return YAFFS_OK;
+ int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock;
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
- /* make these things */
- newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
+ yaffs_HandleChunkError(dev, bi);
- if (!newObjects) {
- 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]);
+ 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));
}
- newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
- dev->freeObjects = newObjects;
- dev->nFreeObjects += nObjects;
- dev->nObjectsCreated += nObjects;
+ /* Delete the chunk */
+ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
+ yaffs_SkipRestOfBlock(dev);
+}
- /* 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;
- }
-
- return YAFFS_OK;
-}
+/*---------------- Name handling functions ------------*/
-/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
-static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device * dev)
+static __u16 yaffs_CalcNameSum(const YCHAR *name)
{
- yaffs_Object *tn = NULL;
-
- /* If there are none left make more */
- if (!dev->freeObjects) {
- yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
- }
-
- if (dev->freeObjects) {
- tn = dev->freeObjects;
- dev->freeObjects =
- (yaffs_Object *) (dev->freeObjects->siblings.next);
- dev->nFreeObjects--;
-
- /* Now sweeten it up... */
+ __u16 sum = 0;
+ __u16 i = 1;
- memset(tn, 0, sizeof(yaffs_Object));
- tn->myDev = dev;
- tn->chunkId = -1;
- tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
- INIT_LIST_HEAD(&(tn->hardLinks));
- INIT_LIST_HEAD(&(tn->hashLink));
- INIT_LIST_HEAD(&tn->siblings);
+ const YUCHAR *bname = (const YUCHAR *) name;
+ if (bname) {
+ while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
- /* 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);
+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
+ sum += yaffs_toupper(*bname) * i;
+#else
+ sum += (*bname) * i;
+#endif
+ i++;
+ bname++;
}
}
-
- return tn;
+ return sum;
}
-static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device * dev, int number,
- __u32 mode)
+static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
{
+#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+ memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
+ if (name && yaffs_strnlen(name,YAFFS_SHORT_NAME_LENGTH+1) <= YAFFS_SHORT_NAME_LENGTH)
+ yaffs_strcpy(obj->shortName, name);
+ else
+ obj->shortName[0] = _Y('\0');
+#endif
+ obj->sum = yaffs_CalcNameSum(name);
+}
- yaffs_Object *obj =
- yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
- if (obj) {
- obj->fake = 1; /* it is fake so it has no NAND presence... */
- obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
- obj->unlinkAllowed = 0; /* ... or unlink it */
- obj->deleted = 0;
- obj->unlinked = 0;
- obj->yst_mode = mode;
- obj->myDev = dev;
- obj->chunkId = 0; /* Not a valid chunk. */
- }
-
- return obj;
+/*-------------------- TNODES -------------------
-}
+ * List of spare tnodes
+ * The list is hooked together using the first pointer
+ * in the tnode.
+ */
-static void yaffs_UnhashObject(yaffs_Object * tn)
+/* yaffs_CreateTnodes creates a bunch more tnodes and
+ * adds them to the tnode free list.
+ * Don't use this function directly
+ */
+static Y_INLINE int yaffs_CalcTnodeSize(yaffs_Device *dev)
{
- 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--;
- }
+ int tnodeSize;
+ /* 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);
+ return tnodeSize;
}
-/* FreeObject frees up a Object and puts it back on the free list */
-static void yaffs_FreeObject(yaffs_Object * tn)
+static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
{
+ int i;
+ int tnodeSize = yaffs_CalcTnodeSize(dev);
+ yaffs_Tnode *newTnodes;
+ __u8 *mem;
+ yaffs_Tnode *curr;
+ yaffs_Tnode *next;
+ yaffs_TnodeList *tnl;
- yaffs_Device *dev = tn->myDev;
+ if (nTnodes < 1)
+ return YAFFS_OK;
-#ifdef __KERNEL__
- if (tn->myInode) {
- /* We're still hooked up to a cached inode.
- * Don't delete now, but mark for later deletion
- */
- tn->deferedFree = 1;
- return;
- }
-#endif
- yaffs_UnhashObject(tn);
+ /* make these things */
- /* Link into the free list. */
- tn->siblings.next = (struct list_head *)(dev->freeObjects);
- dev->freeObjects = tn;
- dev->nFreeObjects++;
-}
+ newTnodes = YMALLOC(nTnodes * tnodeSize);
+ mem = (__u8 *)newTnodes;
-#ifdef __KERNEL__
+ if (!newTnodes) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
+ return YAFFS_FAIL;
+ }
-void yaffs_HandleDeferedFree(yaffs_Object * obj)
-{
- if (obj->deferedFree) {
- yaffs_FreeObject(obj);
+ /* Hook them into the free list */
+#if 0
+ for (i = 0; i < nTnodes - 1; i++) {
+ newTnodes[i].internal[0] = &newTnodes[i + 1];
+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+ newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+#endif
}
-}
+ newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+ newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
#endif
+ dev->freeTnodes = newTnodes;
+#else
+ /* New hookup for wide tnodes */
+ for (i = 0; i < nTnodes - 1; i++) {
+ curr = (yaffs_Tnode *) &mem[i * tnodeSize];
+ next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
+ curr->internal[0] = next;
+ }
-static void yaffs_DeinitialiseObjects(yaffs_Device * dev)
-{
- /* Free the list of allocated Objects */
+ curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
+ curr->internal[0] = dev->freeTnodes;
+ dev->freeTnodes = (yaffs_Tnode *)mem;
- yaffs_ObjectList *tmp;
+#endif
- while (dev->allocatedObjectList) {
- tmp = dev->allocatedObjectList->next;
- YFREE(dev->allocatedObjectList->objects);
- YFREE(dev->allocatedObjectList);
- dev->allocatedObjectList = tmp;
+ dev->nFreeTnodes += nTnodes;
+ dev->nTnodesCreated += nTnodes;
+
+ /* Now add this bunch of tnodes to a list for freeing up.
+ * NB If we can't add this to the management list it isn't fatal
+ * but it just means we can't free this bunch of tnodes later.
+ */
+
+ tnl = YMALLOC(sizeof(yaffs_TnodeList));
+ if (!tnl) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs: Could not add tnodes to management list" TENDSTR)));
+ return YAFFS_FAIL;
+ } else {
+ tnl->tnodes = newTnodes;
+ tnl->next = dev->allocatedTnodeList;
+ dev->allocatedTnodeList = tnl;
}
- dev->freeObjects = NULL;
- dev->nFreeObjects = 0;
+ T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
+
+ return YAFFS_OK;
}
-static void yaffs_InitialiseObjects(yaffs_Device * dev)
+/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
+
+static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
{
- int i;
+ yaffs_Tnode *tn = NULL;
- dev->allocatedObjectList = NULL;
- dev->freeObjects = NULL;
- dev->nFreeObjects = 0;
+#ifdef CONFIG_YAFFS_VALGRIND_TEST
+ tn = YMALLOC(yaffs_CalcTnodeSize(dev));
+ if(tn)
+ dev->nTnodesCreated++;
+#else
+ /* If there are none left make more */
+ if (!dev->freeTnodes)
+ yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
- INIT_LIST_HEAD(&dev->objectBucket[i].list);
- dev->objectBucket[i].count = 0;
+ if (dev->freeTnodes) {
+ tn = dev->freeTnodes;
+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+ if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
+ /* Hoosterman, this thing looks like it isn't in the list */
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
+ }
+#endif
+ dev->freeTnodes = dev->freeTnodes->internal[0];
+ dev->nFreeTnodes--;
}
+#endif
+ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+ return tn;
}
-static int yaffs_FindNiceObjectBucket(yaffs_Device * dev)
+static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
{
- static int x = 0;
- int i;
- int l = 999;
- int lowest = 999999;
+ yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
+ int tnodeSize = yaffs_CalcTnodeSize(dev);
- /* First let's see if we can find one that's empty. */
+ if (tn)
+ memset(tn, 0, tnodeSize);
- for (i = 0; i < 10 && lowest > 0; i++) {
- x++;
- x %= YAFFS_NOBJECT_BUCKETS;
- if (dev->objectBucket[x].count < lowest) {
- lowest = dev->objectBucket[x].count;
- l = x;
- }
+ 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_VALGRIND_TEST
+ YFREE(tn);
+ dev->nTnodesCreated--;
+#else
+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+ if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
+ /* Hoosterman, this thing looks like it is already in the list */
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
+ }
+ tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+#endif
+ tn->internal[0] = dev->freeTnodes;
+ dev->freeTnodes = tn;
+ dev->nFreeTnodes++;
+#endif
}
+ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+}
- /* If we didn't find an empty list, then try
- * looking a bit further for a short one
- */
+static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
+{
+ /* Free the list of allocated tnodes */
+ yaffs_TnodeList *tmp;
- for (i = 0; i < 10 && lowest > 3; i++) {
- x++;
- x %= YAFFS_NOBJECT_BUCKETS;
- if (dev->objectBucket[x].count < lowest) {
- lowest = dev->objectBucket[x].count;
- l = x;
- }
+ while (dev->allocatedTnodeList) {
+ tmp = dev->allocatedTnodeList->next;
+
+ YFREE(dev->allocatedTnodeList->tnodes);
+ YFREE(dev->allocatedTnodeList);
+ dev->allocatedTnodeList = tmp;
}
- return l;
+ dev->freeTnodes = NULL;
+ dev->nFreeTnodes = 0;
+ dev->nTnodesCreated = 0;
}
-static int yaffs_CreateNewObjectNumber(yaffs_Device * dev)
+static void yaffs_InitialiseTnodes(yaffs_Device *dev)
{
- int bucket = yaffs_FindNiceObjectBucket(dev);
+ dev->allocatedTnodeList = NULL;
+ dev->freeTnodes = NULL;
+ dev->nFreeTnodes = 0;
+ dev->nTnodesCreated = 0;
+}
- /* Now find an object value that has not already been taken
- * by scanning the list.
- */
- int found = 0;
- struct list_head *i;
+void yaffs_LoadLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
+ unsigned val)
+{
+ __u32 *map = (__u32 *)tn;
+ __u32 bitInMap;
+ __u32 bitInWord;
+ __u32 wordInMap;
+ __u32 mask;
- __u32 n = (__u32) bucket;
+ pos &= YAFFS_TNODES_LEVEL0_MASK;
+ val >>= dev->chunkGroupBits;
- /* yaffs_CheckObjectHashSanity(); */
+ bitInMap = pos * dev->tnodeWidth;
+ wordInMap = bitInMap / 32;
+ bitInWord = bitInMap & (32 - 1);
- 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;
- }
- }
- }
- }
+ mask = dev->tnodeMask << bitInWord;
+ map[wordInMap] &= ~mask;
+ map[wordInMap] |= (mask & (val << bitInWord));
- return n;
+ if (dev->tnodeWidth > (32 - bitInWord)) {
+ bitInWord = (32 - bitInWord);
+ wordInMap++;;
+ mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
+ map[wordInMap] &= ~mask;
+ map[wordInMap] |= (mask & (val >> bitInWord));
+ }
}
-static void yaffs_HashObject(yaffs_Object * in)
+static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
+ unsigned pos)
{
- int bucket = yaffs_HashFunction(in->objectId);
- yaffs_Device *dev = in->myDev;
+ __u32 *map = (__u32 *)tn;
+ __u32 bitInMap;
+ __u32 bitInWord;
+ __u32 wordInMap;
+ __u32 val;
- list_add(&in->hashLink, &dev->objectBucket[bucket].list);
- dev->objectBucket[bucket].count++;
+ pos &= YAFFS_TNODES_LEVEL0_MASK;
-}
+ bitInMap = pos * dev->tnodeWidth;
+ wordInMap = bitInMap / 32;
+ bitInWord = bitInMap & (32 - 1);
-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number)
-{
- int bucket = yaffs_HashFunction(number);
- struct list_head *i;
- yaffs_Object *in;
+ val = map[wordInMap] >> bitInWord;
- list_for_each(i, &dev->objectBucket[bucket].list) {
- /* Look if it is in the list */
- if (i) {
- in = list_entry(i, yaffs_Object, hashLink);
- if (in->objectId == number) {
-#ifdef __KERNEL__
- /* Don't tell the VFS about this one if it is defered free */
- if (in->deferedFree)
- return NULL;
-#endif
+ if (dev->tnodeWidth > (32 - bitInWord)) {
+ bitInWord = (32 - bitInWord);
+ wordInMap++;;
+ val |= (map[wordInMap] << bitInWord);
+ }
- return in;
- }
- }
- }
+ val &= dev->tnodeMask;
+ val <<= dev->chunkGroupBits;
- return NULL;
+ return val;
}
-yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number,
- yaffs_ObjectType type)
-{
-
- yaffs_Object *theObject;
-
- if (number < 0) {
- number = yaffs_CreateNewObjectNumber(dev);
- }
+/* ------------------- End of individual tnode manipulation -----------------*/
- theObject = yaffs_AllocateEmptyObject(dev);
+/* ---------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.
+ */
- if (theObject) {
- theObject->fake = 0;
- theObject->renameAllowed = 1;
- theObject->unlinkAllowed = 1;
- theObject->objectId = number;
- yaffs_HashObject(theObject);
- theObject->variantType = type;
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_WinFileTimeNow(theObject->win_atime);
- theObject->win_ctime[0] = theObject->win_mtime[0] =
- theObject->win_atime[0];
- theObject->win_ctime[1] = theObject->win_mtime[1] =
- theObject->win_atime[1];
+/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
+static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
+ yaffs_FileStructure *fStruct,
+ __u32 chunkId)
+{
+ yaffs_Tnode *tn = fStruct->top;
+ __u32 i;
+ int requiredTallness;
+ int level = fStruct->topLevel;
-#else
+ dev=dev;
- theObject->yst_atime = theObject->yst_mtime =
- theObject->yst_ctime = Y_CURRENT_TIME;
-#endif
- switch (type) {
- case YAFFS_OBJECT_TYPE_FILE:
- theObject->variant.fileVariant.fileSize = 0;
- theObject->variant.fileVariant.scannedFileSize = 0;
- theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
- theObject->variant.fileVariant.topLevel = 0;
- theObject->variant.fileVariant.top =
- yaffs_GetTnode(dev);
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- INIT_LIST_HEAD(&theObject->variant.directoryVariant.
- children);
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- case YAFFS_OBJECT_TYPE_HARDLINK:
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* No action required */
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* todo this should not happen */
- break;
- }
- }
+ /* Check sane level and chunk Id */
+ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
+ return NULL;
- return theObject;
-}
+ if (chunkId > YAFFS_MAX_CHUNK_ID)
+ return NULL;
-static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device * dev,
- int number,
- yaffs_ObjectType type)
-{
- yaffs_Object *theObject = NULL;
+ /* First check we're tall enough (ie enough topLevel) */
- if (number > 0) {
- theObject = yaffs_FindObjectByNumber(dev, number);
+ i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
+ requiredTallness = 0;
+ while (i) {
+ i >>= YAFFS_TNODES_INTERNAL_BITS;
+ requiredTallness++;
}
- if (!theObject) {
- theObject = yaffs_CreateNewObject(dev, number, type);
- }
+ if (requiredTallness > fStruct->topLevel)
+ return NULL; /* Not tall enough, so we can't find it */
- return theObject;
+ /* 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;
}
-static YCHAR *yaffs_CloneString(const YCHAR * str)
+/* 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)
{
- YCHAR *newStr = NULL;
+ int requiredTallness;
+ int i;
+ int l;
+ yaffs_Tnode *tn;
- if (str && *str) {
- newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
- yaffs_strcpy(newStr, str);
- }
+ __u32 x;
- return newStr;
-}
+ /* Check sane level and page Id */
+ if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
+ return NULL;
-/*
- * 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;
+ if (chunkId > YAFFS_MAX_CHUNK_ID)
+ return NULL;
- yaffs_Device *dev = parent->myDev;
+ /* First check we're tall enough (ie enough topLevel) */
- /* 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;
+ x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
+ requiredTallness = 0;
+ while (x) {
+ x >>= YAFFS_TNODES_INTERNAL_BITS;
+ requiredTallness++;
}
- in = yaffs_CreateNewObject(dev, -1, type);
- if (in) {
- in->chunkId = -1;
- in->valid = 1;
- in->variantType = type;
+ if (requiredTallness > fStruct->topLevel) {
+ /* Not tall enough, gotta make the tree taller */
+ for (i = fStruct->topLevel; i < requiredTallness; i++) {
- in->yst_mode = mode;
+ tn = yaffs_GetTnode(dev);
-#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];
+ if (tn) {
+ tn->internal[0] = fStruct->top;
+ fStruct->top = tn;
+ fStruct->topLevel++;
+ } else {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("yaffs: no more tnodes" TENDSTR)));
+ return NULL;
+ }
+ }
+ }
-#else
- in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
+ /* Traverse down to level 0, adding anything we need */
- in->yst_rdev = rdev;
- in->yst_uid = uid;
- in->yst_gid = gid;
-#endif
- in->nDataChunks = 0;
+ l = fStruct->topLevel;
+ tn = fStruct->top;
- yaffs_SetObjectName(in, name);
- in->dirty = 1;
+ if (l > 0) {
+ while (l > 0 && tn) {
+ x = (chunkId >>
+ (YAFFS_TNODES_LEVEL0_BITS +
+ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
+ YAFFS_TNODES_INTERNAL_MASK;
- yaffs_AddObjectToDirectory(parent, in);
- in->myDev = parent->myDev;
+ if ((l > 1) && !tn->internal[x]) {
+ /* Add missing non-level-zero tnode */
+ tn->internal[x] = yaffs_GetTnode(dev);
+ if(!tn->internal[x])
+ return NULL;
+ } else if (l == 1) {
+ /* Looking from level 1 at level 0 */
+ if (passedTn) {
+ /* If we already have one, then release it.*/
+ if (tn->internal[x])
+ yaffs_FreeTnode(dev, tn->internal[x]);
+ tn->internal[x] = passedTn;
+
+ } else if (!tn->internal[x]) {
+ /* Don't have one, none passed in */
+ tn->internal[x] = yaffs_GetTnode(dev);
+ if(!tn->internal[x])
+ return NULL;
+ }
+ }
- 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:
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- case YAFFS_OBJECT_TYPE_SPECIAL:
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* do nothing */
- break;
+ tn = tn->internal[x];
+ l--;
}
-
- if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
- /* Could not create the object header, fail the creation */
- yaffs_DestroyObject(in);
- in = NULL;
+ } else {
+ /* top is level 0 */
+ if (passedTn) {
+ memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
+ yaffs_FreeTnode(dev, passedTn);
}
-
}
- return in;
+ return tn;
}
-yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name,
- __u32 mode, __u32 uid, __u32 gid)
+static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
+ yaffs_ExtendedTags *tags, int objectId,
+ int chunkInInode)
{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
- uid, gid, NULL, NULL, 0);
-}
+ int j;
-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);
+ for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
+ if (yaffs_CheckChunkBit(dev, theChunk / dev->param.nChunksPerBlock,
+ theChunk % dev->param.nChunksPerBlock)) {
+
+ if(dev->chunkGroupSize == 1)
+ return theChunk;
+ else {
+ yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
+ tags);
+ if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
+ /* found it; */
+ return theChunk;
+ }
+ }
+ }
+ theChunk++;
+ }
+ return -1;
}
-yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name,
- __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
-{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
- uid, gid, NULL, NULL, rdev);
-}
-yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name,
- __u32 mode, __u32 uid, __u32 gid,
- const YCHAR * alias)
-{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
- uid, gid, NULL, alias, 0);
-}
+/* 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.
+ */
-/* yaffs_Link returns the object id of the equivalent object.*/
-yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name,
- yaffs_Object * equivalentObject)
+static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
+ int chunkOffset, int *limit)
{
- /* Get the real object in case we were fed a hard link as an equivalent object */
- equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
+ int i;
+ int chunkInInode;
+ int theChunk;
+ yaffs_ExtendedTags tags;
+ int foundChunk;
+ yaffs_Device *dev = in->myDev;
- if (yaffs_MknodObject
- (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
- equivalentObject, NULL, 0)) {
- return equivalentObject;
- } else {
- return NULL;
- }
+ int allDone = 1;
-}
+ if (tn) {
+ if (level > 0) {
+ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
+ i--) {
+ if (tn->internal[i]) {
+ if (limit && (*limit) < 0) {
+ allDone = 0;
+ } else {
+ allDone =
+ yaffs_DeleteWorker(in,
+ tn->
+ internal
+ [i],
+ level -
+ 1,
+ (chunkOffset
+ <<
+ YAFFS_TNODES_INTERNAL_BITS)
+ + i,
+ limit);
+ }
+ if (allDone) {
+ yaffs_FreeTnode(dev,
+ tn->
+ internal[i]);
+ tn->internal[i] = NULL;
+ }
+ }
+ }
+ return (allDone) ? 1 : 0;
+ } else if (level == 0) {
+ int hitLimit = 0;
-static int yaffs_ChangeObjectName(yaffs_Object * obj, yaffs_Object * newDir,
- const YCHAR * newName, int force, int shadows)
-{
- int unlinkOp;
- int deleteOp;
+ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
+ i--) {
+ theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+ if (theChunk) {
- yaffs_Object *existingTarget;
+ chunkInInode = (chunkOffset <<
+ YAFFS_TNODES_LEVEL0_BITS) + i;
- if (newDir == NULL) {
- newDir = obj->parent; /* use the old directory */
- }
-
- if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("tragendy: yaffs_ChangeObjectName: newDir is not a directory"
- TENDSTR)));
- YBUG();
- }
-
- /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
- if (obj->myDev->isYaffs2) {
- unlinkOp = (newDir == obj->myDev->unlinkedDir);
- } else {
- unlinkOp = (newDir == obj->myDev->unlinkedDir
- && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
- }
+ foundChunk =
+ yaffs_FindChunkInGroup(dev,
+ theChunk,
+ &tags,
+ in->objectId,
+ chunkInInode);
- deleteOp = (newDir == obj->myDev->deletedDir);
+ if (foundChunk > 0) {
+ yaffs_DeleteChunk(dev,
+ foundChunk, 1,
+ __LINE__);
+ in->nDataChunks--;
+ if (limit) {
+ *limit = *limit - 1;
+ if (*limit <= 0)
+ hitLimit = 1;
+ }
- 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_LoadLevel0Tnode(dev, tn, i, 0);
+ }
- yaffs_AddObjectToDirectory(newDir, obj);
+ }
+ return (i < 0) ? 1 : 0;
- 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;
+ return 1;
+
}
-int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName,
- yaffs_Object * newDir, const YCHAR * newName)
+static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
{
- yaffs_Object *obj;
- yaffs_Object *existingTarget;
- int force = 0;
+ yaffs_BlockInfo *theBlock;
-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
- /* Special case for case insemsitive systems (eg. WinCE).
- * While look-up is case insensitive, the name isn't.
- * Therefore we might want to change x.txt to X.txt
- */
- if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0) {
- force = 1;
+ T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
+
+ theBlock = yaffs_GetBlockInfo(dev, chunk / dev->param.nChunksPerBlock);
+ if (theBlock) {
+ theBlock->softDeletions++;
+ dev->nFreeChunks++;
+ yaffs_UpdateOldestDirtySequence(dev,theBlock);
}
-#endif
+}
- obj = yaffs_FindObjectByName(oldDir, oldName);
+/* 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.
+ */
- if (obj && obj->renameAllowed) {
+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;
- /* Now do the handling for an existing target, if there is one */
+ if (tn) {
+ if (level > 0) {
- existingTarget = yaffs_FindObjectByName(newDir, newName);
- if (existingTarget &&
- existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
- !list_empty(&existingTarget->variant.directoryVariant.children)) {
- /* There is a target that is a non-empty directory, so we fail */
- return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
- } else if (existingTarget && existingTarget != obj) {
- /* Nuke the target first, using shadowing,
- * but only if it isn't the same object
- */
- yaffs_ChangeObjectName(obj, newDir, newName, force,
- existingTarget->objectId);
- yaffs_UnlinkObject(existingTarget);
- }
+ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
+ i--) {
+ if (tn->internal[i]) {
+ allDone =
+ yaffs_SoftDeleteWorker(in,
+ tn->
+ internal[i],
+ level - 1,
+ (chunkOffset
+ <<
+ YAFFS_TNODES_INTERNAL_BITS)
+ + i);
+ if (allDone) {
+ yaffs_FreeTnode(dev,
+ tn->
+ internal[i]);
+ tn->internal[i] = NULL;
+ } else {
+ /* Hoosterman... how could this happen? */
+ }
+ }
+ }
+ return (allDone) ? 1 : 0;
+ } else if (level == 0) {
- return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
- }
- return YAFFS_FAIL;
-}
+ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
+ theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+ if (theChunk) {
+ /* Note this does not find the real chunk, only the chunk group.
+ * We make an assumption that a chunk group is not larger than
+ * a block.
+ */
+ yaffs_SoftDeleteChunk(dev, theChunk);
+ yaffs_LoadLevel0Tnode(dev, tn, i, 0);
+ }
-/*------------------------- Block Management and Page Allocation ----------------*/
+ }
+ return 1;
-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));
- if(!dev->blockInfo){
- dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
- dev->blockInfoAlt = 1;
- }
- else
- dev->blockInfoAlt = 0;
-
- /* 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);
- return YAFFS_OK;
}
- return YAFFS_FAIL;
+ return 1;
}
-static void yaffs_DeinitialiseBlocks(yaffs_Device * dev)
+static void yaffs_SoftDeleteFile(yaffs_Object *obj)
{
- if(dev->blockInfoAlt)
- YFREE_ALT(dev->blockInfo);
- else
- YFREE(dev->blockInfo);
- dev->blockInfoAlt = 0;
-
- dev->blockInfo = NULL;
- YFREE(dev->chunkBits);
- dev->chunkBits = NULL;
+ if (obj->deleted &&
+ obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
+ if (obj->nDataChunks <= 0) {
+ /* Empty file with no duplicate object headers, just delete it immediately */
+ yaffs_FreeTnode(obj->myDev,
+ obj->variant.fileVariant.top);
+ obj->variant.fileVariant.top = NULL;
+ T(YAFFS_TRACE_TRACING,
+ (TSTR("yaffs: Deleting empty file %d" TENDSTR),
+ obj->objectId));
+ yaffs_DoGenericObjectDeletion(obj);
+ } else {
+ yaffs_SoftDeleteWorker(obj,
+ obj->variant.fileVariant.top,
+ obj->variant.fileVariant.
+ topLevel, 0);
+ obj->softDeleted = 1;
+ }
+ }
}
-static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device * dev,
- yaffs_BlockInfo * bi)
+/* Pruning removes any part of the file structure tree that is beyond the
+ * bounds of the file (ie that does not point to chunks).
+ *
+ * A file should only get pruned when its size is reduced.
+ *
+ * Before pruning, the chunks must be pulled from the tree and the
+ * level 0 tnode entries must be zeroed out.
+ * Could also use this for file deletion, but that's probably better handled
+ * by a special case.
+ *
+ * This function is recursive. For levels > 0 the function is called again on
+ * any sub-tree. For level == 0 we just check if the sub-tree has data.
+ * If there is no data in a subtree then it is pruned.
+ */
+
+static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
+ __u32 level, int del0)
{
int i;
- __u32 seq;
- yaffs_BlockInfo *b;
+ int hasData;
- if (!dev->isYaffs2)
- return 1; /* disqualification only applies to yaffs2. */
+ if (tn) {
+ hasData = 0;
- if (!bi->hasShrinkHeader)
- return 1; /* can gc */
+ if(level > 0){
+ for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
+ if (tn->internal[i]) {
+ tn->internal[i] =
+ yaffs_PruneWorker(dev, tn->internal[i],
+ level - 1,
+ (i == 0) ? del0 : 1);
+ }
- /* Find the oldest dirty sequence number if we don't know it and save it
- * so we don't have to keep recomputing it.
- */
- if (!dev->oldestDirtySequence) {
- seq = dev->sequenceNumber;
-
- for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
- i++) {
- b = yaffs_GetBlockInfo(dev, i);
- if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
- (b->pagesInUse - b->softDeletions) <
- dev->nChunksPerBlock && b->sequenceNumber < seq) {
- seq = b->sequenceNumber;
+ if (tn->internal[i])
+ hasData++;
}
+ } else {
+ int tnodeSize_u32 = yaffs_CalcTnodeSize(dev)/sizeof(__u32);
+ __u32 *map = (__u32 *)tn;
+
+ for(i = 0; !hasData && i < tnodeSize_u32; i++){
+ if(map[i])
+ hasData++;
+ }
+ }
+
+ if (hasData == 0 && del0) {
+ /* Free and return NULL */
+
+ yaffs_FreeTnode(dev, tn);
+ tn = NULL;
}
- dev->oldestDirtySequence = seq;
- }
- /* Can't do gc of this block if there are any blocks older than this one that have
- * discarded pages.
- */
- return (bi->sequenceNumber <= dev->oldestDirtySequence);
+ }
- return 1;
+ return tn;
}
-/* 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_PruneFileStructure(yaffs_Device *dev,
+ yaffs_FileStructure *fStruct)
{
+ int i;
+ int hasData;
+ int done = 0;
+ yaffs_Tnode *tn;
- int b = dev->currentDirtyChecker;
+ if (fStruct->topLevel > 0) {
+ fStruct->top =
+ yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
- int i;
- int iterations;
- int dirtiest = -1;
- int pagesInUse;
- yaffs_BlockInfo *bi;
- static int nonAggressiveSkip = 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)
+ */
- /* 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.
- */
+ while (fStruct->topLevel && !done) {
+ tn = fStruct->top;
- nonAggressiveSkip--;
+ hasData = 0;
+ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
+ if (tn->internal[i])
+ hasData++;
+ }
- if (!aggressive && (nonAggressiveSkip > 0)) {
- return -1;
+ if (!hasData) {
+ fStruct->top = tn->internal[0];
+ fStruct->topLevel--;
+ yaffs_FreeTnode(dev, tn);
+ } else {
+ done = 1;
+ }
+ }
}
- pagesInUse =
- (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
+ return YAFFS_OK;
+}
- if (aggressive) {
- iterations =
- dev->internalEndBlock - dev->internalStartBlock + 1;
- } else {
- iterations =
- dev->internalEndBlock - dev->internalStartBlock + 1;
- iterations = iterations / 16;
- if (iterations > 200) {
- iterations = 200;
- }
- }
+/*-------------------- End of File Structure functions.-------------------*/
- for (i = 0; i <= iterations && pagesInUse > 0; i++) {
- b++;
- if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
- b = dev->internalStartBlock;
- }
+/* 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 (b < dev->internalStartBlock || b > dev->internalEndBlock) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> Block %d is not valid" TENDSTR), b));
- YBUG();
- }
+ if (nObjects < 1)
+ return YAFFS_OK;
- bi = yaffs_GetBlockInfo(dev, b);
+ /* make these things */
+ newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
+ list = YMALLOC(sizeof(yaffs_ObjectList));
- if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
- (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
- dirtiest = b;
- pagesInUse = (bi->pagesInUse - bi->softDeletions);
+ if (!newObjects || !list) {
+ if (newObjects){
+ YFREE(newObjects);
+ newObjects = NULL;
}
+ if (list){
+ YFREE(list);
+ list = NULL;
+ }
+ T(YAFFS_TRACE_ALLOCATE,
+ (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
+ return YAFFS_FAIL;
}
- dev->currentDirtyChecker = b;
-
- if (dirtiest > 0) {
- T(YAFFS_TRACE_GC,
- (TSTR("GC Selected block %d with %d free" TENDSTR), dirtiest,
- dev->nChunksPerBlock - pagesInUse));
+ /* Hook them into the free list */
+ for (i = 0; i < nObjects - 1; i++) {
+ newObjects[i].siblings.next =
+ (struct ylist_head *)(&newObjects[i + 1]);
}
- dev->oldestDirtySequence = 0;
+ newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
+ dev->freeObjects = newObjects;
+ dev->nFreeObjects += nObjects;
+ dev->nObjectsCreated += nObjects;
- if (dirtiest > 0) {
- nonAggressiveSkip = 4;
- }
+ /* Now add this bunch of Objects to a list for freeing up. */
- return dirtiest;
-}
+ list->objects = newObjects;
+ list->next = dev->allocatedObjectList;
+ dev->allocatedObjectList = list;
-static void yaffs_BlockBecameDirty(yaffs_Device * dev, int blockNo)
-{
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
+ return YAFFS_OK;
+}
- 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.
- */
- bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
+/* 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 (!bi->needsRetiring) {
- erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
- if (!erasedOk) {
- dev->nErasureFailures++;
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
- }
- }
+#ifdef CONFIG_YAFFS_VALGRIND_TEST
+ tn = YMALLOC(sizeof(yaffs_Object));
+ if(tn)
+ dev->nObjectsCreated++;
+#else
+ /* If there are none left make more */
+ if (!dev->freeObjects)
+ yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
- 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 (dev->freeObjects) {
+ tn = dev->freeObjects;
+ dev->freeObjects =
+ (yaffs_Object *) (dev->freeObjects->siblings.next);
+ dev->nFreeObjects--;
}
+#endif
+ if (tn) {
+ /* Now sweeten 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 {
- dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */
+ memset(tn, 0, sizeof(yaffs_Object));
+ tn->beingCreated = 1;
- yaffs_RetireBlock(dev, blockNo);
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("**>> Block %d retired" TENDSTR), blockNo));
- }
-}
+ tn->myDev = dev;
+ tn->hdrChunk = 0;
+ tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
+ YINIT_LIST_HEAD(&(tn->hardLinks));
+ YINIT_LIST_HEAD(&(tn->hashLink));
+ YINIT_LIST_HEAD(&tn->siblings);
-static int yaffs_FindBlockForAllocation(yaffs_Device * dev)
-{
- int i;
- yaffs_BlockInfo *bi;
+ /* Now make the directory sane */
+ if (dev->rootDir) {
+ tn->parent = dev->rootDir;
+ ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
+ }
- if (dev->nErasedBlocks < 1) {
- /* Hoosterman we've got a problem.
- * Can't get space to gc
+ /* Add it to the lost and found directory.
+ * NB Can't put root or lostNFound in lostNFound so
+ * check if lostNFound exists first
*/
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs tragedy: no more eraased blocks" TENDSTR)));
+ if (dev->lostNFoundDir)
+ yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
- return -1;
+ tn->beingCreated = 0;
}
-
- /* Find an empty block. */
- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
- dev->allocationBlockFinder++;
- if (dev->allocationBlockFinder < dev->internalStartBlock
- || dev->allocationBlockFinder > dev->internalEndBlock) {
- dev->allocationBlockFinder = dev->internalStartBlock;
- }
+ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
- bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
+ return tn;
+}
- if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
- bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
- dev->sequenceNumber++;
- bi->sequenceNumber = dev->sequenceNumber;
- dev->nErasedBlocks--;
- T(YAFFS_TRACE_ALLOCATE,
- (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
- dev->allocationBlockFinder, dev->sequenceNumber,
- dev->nErasedBlocks));
- return dev->allocationBlockFinder;
- }
+static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
+ __u32 mode)
+{
+
+ yaffs_Object *obj =
+ yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
+ if (obj) {
+ obj->fake = 1; /* it is fake so it might have no NAND presence... */
+ obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
+ obj->unlinkAllowed = 0; /* ... or unlink it */
+ obj->deleted = 0;
+ obj->unlinked = 0;
+ obj->yst_mode = mode;
+ obj->myDev = dev;
+ obj->hdrChunk = 0; /* Not a valid chunk. */
}
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("yaffs tragedy: no more eraased blocks, but there should have been %d"
- TENDSTR), dev->nErasedBlocks));
+ return obj;
- return -1;
}
-
-
-static int yaffs_CheckSpaceForAllocation(yaffs_Device * dev)
+static void yaffs_UnhashObject(yaffs_Object *tn)
{
- int reservedChunks = (dev->nReservedBlocks * dev->nChunksPerBlock);
- return (dev->nFreeChunks > reservedChunks);
+ int bucket;
+ yaffs_Device *dev = tn->myDev;
+
+ /* If it is still linked into the bucket list, free from the list */
+ if (!ylist_empty(&tn->hashLink)) {
+ ylist_del_init(&tn->hashLink);
+ bucket = yaffs_HashFunction(tn->objectId);
+ dev->objectBucket[bucket].count--;
+ }
}
-static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve)
+/* FreeObject frees up a Object and puts it back on the free list */
+static void yaffs_FreeObject(yaffs_Object *tn)
{
- int retVal;
- yaffs_BlockInfo *bi;
+ yaffs_Device *dev = tn->myDev;
- if (dev->allocationBlock < 0) {
- /* Get next block to allocate off */
- dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
- dev->allocationPage = 0;
- }
+ T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
- if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
- /* Not enough space to allocate unless we're allowed to use the reserve. */
- return -1;
- }
+ if (!tn)
+ YBUG();
+ if (tn->parent)
+ YBUG();
+ if (!ylist_empty(&tn->siblings))
+ YBUG();
- if (dev->nErasedBlocks < dev->nReservedBlocks
- && dev->allocationPage == 0) {
- T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
+
+ 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;
}
- /* Next page please.... */
- if (dev->allocationBlock >= 0) {
- bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
+ yaffs_UnhashObject(tn);
- retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
- dev->allocationPage;
- bi->pagesInUse++;
- yaffs_SetChunkBit(dev, dev->allocationBlock,
- dev->allocationPage);
+#ifdef CONFIG_YAFFS_VALGRIND_TEST
+ YFREE(tn);
+ dev->nObjectsCreated--;
+ tn = NULL;
+#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*/
+}
- dev->allocationPage++;
- dev->nFreeChunks--;
+void yaffs_HandleDeferedFree(yaffs_Object *obj)
+{
+ if (obj->deferedFree)
+ yaffs_FreeObject(obj);
+}
- /* If the block is full set the state to full */
- if (dev->allocationPage >= dev->nChunksPerBlock) {
- bi->blockState = YAFFS_BLOCK_STATE_FULL;
- dev->allocationBlock = -1;
- }
- return retVal;
+static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
+{
+ /* Free the list of allocated Objects */
+
+ yaffs_ObjectList *tmp;
+
+ while (dev->allocatedObjectList) {
+ tmp = dev->allocatedObjectList->next;
+ YFREE(dev->allocatedObjectList->objects);
+ YFREE(dev->allocatedObjectList);
+
+ dev->allocatedObjectList = tmp;
}
-
- T(YAFFS_TRACE_ERROR,
- (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
- return -1;
+ dev->freeObjects = NULL;
+ dev->nFreeObjects = 0;
+ dev->nObjectsCreated = 0;
}
-static int yaffs_GetErasedChunks(yaffs_Device * dev)
+static void yaffs_InitialiseObjects(yaffs_Device *dev)
{
- int n;
+ int i;
- n = dev->nErasedBlocks * dev->nChunksPerBlock;
+ dev->allocatedObjectList = NULL;
+ dev->freeObjects = NULL;
+ dev->nFreeObjects = 0;
- if (dev->allocationBlock > 0) {
- n += (dev->nChunksPerBlock - dev->allocationPage);
+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+ YINIT_LIST_HEAD(&dev->objectBucket[i].list);
+ dev->objectBucket[i].count = 0;
}
-
- return n;
-
}
-static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block)
+static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
{
- int oldChunk;
- int newChunk;
- int chunkInBlock;
- int markNAND;
- int retVal = YAFFS_OK;
- int cleanups = 0;
int i;
+ int l = 999;
+ int lowest = 999999;
- int chunksBefore = yaffs_GetErasedChunks(dev);
- int chunksAfter;
- yaffs_ExtendedTags tags;
+ /* Search for the shortest list or one that
+ * isn't too long.
+ */
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
-
- yaffs_Object *object;
-
- bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
+ for (i = 0; i < 10 && lowest > 4; i++) {
+ dev->bucketFinder++;
+ dev->bucketFinder %= YAFFS_NOBJECT_BUCKETS;
+ if (dev->objectBucket[dev->bucketFinder].count < lowest) {
+ lowest = dev->objectBucket[dev->bucketFinder].count;
+ l = dev->bucketFinder;
+ }
- T(YAFFS_TRACE_TRACING,
- (TSTR("Collecting block %d, in use %d, shrink %d, " TENDSTR), block,
- bi->pagesInUse, bi->hasShrinkHeader));
+ }
- /*yaffs_VerifyFreeChunks(dev); */
+ return l;
+}
- bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
+static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
+{
+ int bucket = yaffs_FindNiceObjectBucket(dev);
- /* Take off the number of soft deleted entries because
- * they're going to get really deleted during GC.
+ /* Now find an object value that has not already been taken
+ * by scanning the list.
*/
- dev->nFreeChunks -= bi->softDeletions;
- dev->isDoingGC = 1;
+ int found = 0;
+ struct ylist_head *i;
- 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 {
+ __u32 n = (__u32) bucket;
- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+ /* yaffs_CheckObjectHashSanity(); */
- for (chunkInBlock = 0, oldChunk = block * dev->nChunksPerBlock;
- chunkInBlock < dev->nChunksPerBlock
- && yaffs_StillSomeChunkBits(dev, block);
- chunkInBlock++, oldChunk++) {
- if (yaffs_CheckChunkBit(dev, block, chunkInBlock)) {
+ 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;
+ }
+ }
+ }
+ }
- /* This page is in use and might need to be copied off */
+ return n;
+}
- markNAND = 1;
+static void yaffs_HashObject(yaffs_Object *in)
+{
+ int bucket = yaffs_HashFunction(in->objectId);
+ yaffs_Device *dev = in->myDev;
- yaffs_InitialiseTags(&tags);
+ ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
+ dev->objectBucket[bucket].count++;
+}
- yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
- buffer, &tags);
+yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
+{
+ int bucket = yaffs_HashFunction(number);
+ struct ylist_head *i;
+ yaffs_Object *in;
- object =
- yaffs_FindObjectByNumber(dev,
- tags.objectId);
+ 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) {
- T(YAFFS_TRACE_GC_DETAIL,
- (TSTR
- ("Collecting page %d, %d %d %d " TENDSTR),
- chunkInBlock, tags.objectId, tags.chunkId,
- tags.byteCount));
+ /* Don't tell the VFS about this one if it is defered free */
+ if (in->deferedFree)
+ return NULL;
- if (!object) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("page %d in gc has no object "
- TENDSTR), oldChunk));
- }
+ return in;
+ }
+ }
+ }
- if (object && object->deleted
- && tags.chunkId != 0) {
- /* Data chunk in a deleted file, throw it away
- * It's a soft deleted data chunk,
- * No need to copy this, just forget about it and
- * fix up the object.
- */
+ return NULL;
+}
- object->nDataChunks--;
+yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
+ yaffs_ObjectType type)
+{
+ yaffs_Object *theObject=NULL;
+ yaffs_Tnode *tn = NULL;
- 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);
+ if (number < 0)
+ number = yaffs_CreateNewObjectNumber(dev);
- } 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++;
+ if (type == YAFFS_OBJECT_TYPE_FILE) {
+ tn = yaffs_GetTnode(dev);
+ if (!tn)
+ return NULL;
+ }
- dev->nGCCopies++;
+ theObject = yaffs_AllocateEmptyObject(dev);
+ if (!theObject){
+ if(tn)
+ yaffs_FreeTnode(dev,tn);
+ return NULL;
+ }
- if (tags.chunkId == 0) {
- /* It is an object Id,
- * We need to nuke the shrinkheader flags first
- * We no longer want the shrinkHeader flag since its work is done
- * and if it is left in place it will mess up scanning.
- * Also, clear out any shadowing stuff
- */
- yaffs_ObjectHeader *oh;
- oh = (yaffs_ObjectHeader *)buffer;
- oh->isShrink = 0;
- oh->shadowsObject = -1;
- tags.extraShadows = 0;
- tags.extraIsShrinkHeader = 0;
- }
+ if (theObject) {
+ theObject->fake = 0;
+ theObject->renameAllowed = 1;
+ theObject->unlinkAllowed = 1;
+ theObject->objectId = number;
+ yaffs_HashObject(theObject);
+ theObject->variantType = type;
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_WinFileTimeNow(theObject->win_atime);
+ theObject->win_ctime[0] = theObject->win_mtime[0] =
+ theObject->win_atime[0];
+ theObject->win_ctime[1] = theObject->win_mtime[1] =
+ theObject->win_atime[1];
- newChunk =
- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
+#else
- if (newChunk < 0) {
- retVal = YAFFS_FAIL;
- } else {
+ theObject->yst_atime = theObject->yst_mtime =
+ theObject->yst_ctime = Y_CURRENT_TIME;
+#endif
+ switch (type) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ theObject->variant.fileVariant.fileSize = 0;
+ theObject->variant.fileVariant.scannedFileSize = 0;
+ theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
+ theObject->variant.fileVariant.topLevel = 0;
+ theObject->variant.fileVariant.top = tn;
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
+ children);
+ YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
+ dirty);
+ 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;
+ }
+ }
- /* Ok, now fix up the Tnodes etc. */
+ return theObject;
+}
- if (tags.chunkId == 0) {
- /* It's a header */
- object->chunkId = newChunk;
- object->serial = tags.serialNumber;
- } else {
- /* It's a data chunk */
- yaffs_PutChunkIntoFile
- (object,
- tags.chunkId,
- newChunk, 0);
- }
- }
- }
+static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
+ int number,
+ yaffs_ObjectType type)
+{
+ yaffs_Object *theObject = NULL;
- yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
+ if (number > 0)
+ theObject = yaffs_FindObjectByNumber(dev, number);
- }
- }
+ if (!theObject)
+ theObject = yaffs_CreateNewObject(dev, number, type);
- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+ return theObject;
+}
- /* 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);
- }
- }
+static YCHAR *yaffs_CloneString(const YCHAR *str)
+{
+ YCHAR *newStr = NULL;
+ int len;
- }
+ if (!str)
+ str = _Y("");
- if (chunksBefore >= (chunksAfter = yaffs_GetErasedChunks(dev))) {
- T(YAFFS_TRACE_GC,
- (TSTR
- ("gc did not increase free chunks before %d after %d"
- TENDSTR), chunksBefore, chunksAfter));
+ len = yaffs_strnlen(str,YAFFS_MAX_ALIAS_LENGTH);
+ newStr = YMALLOC((len + 1) * sizeof(YCHAR));
+ if (newStr){
+ yaffs_strncpy(newStr, str,len);
+ newStr[len] = 0;
}
+ return newStr;
- dev->isDoingGC = 0;
-
- return YAFFS_OK;
}
-/* New garbage collector
- * If we're very low on erased blocks then we do aggressive garbage collection
- * otherwise we do "leasurely" garbage collection.
- * Aggressive gc looks further (whole array) and will accept less dirty blocks.
- * Passive gc only inspects smaller areas and will only accept more dirty blocks.
- *
- * The idea is to help clear out space in a more spread-out manner.
- * Dunno if it really does anything useful.
+/*
+ * Mknod (create) a new object.
+ * equivalentObject only has meaning for a hard link;
+ * aliasString only has meaning for a symlink.
+ * rdev only has meaning for devices (a subset of special objects)
*/
-static int yaffs_CheckGarbageCollection(yaffs_Device * dev)
+
+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)
{
- int block;
- int aggressive;
- int gcOk = YAFFS_OK;
- int maxTries = 0;
+ yaffs_Object *in;
+ YCHAR *str = NULL;
- if (dev->isDoingGC) {
- /* Bail out so we don't get recursive gc */
- return YAFFS_OK;
- }
-
- /* This loop should pass the first time.
- * We'll only see looping here if the erase of the collected block fails.
- */
+ yaffs_Device *dev = parent->myDev;
- do {
- maxTries++;
- if (dev->nErasedBlocks < dev->nReservedBlocks) {
- /* We need a block soon...*/
- aggressive = 1;
- } else {
- /* We're in no hurry */
- aggressive = 0;
- }
+ /* 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;
- block = yaffs_FindBlockForGarbageCollection(dev, aggressive);
+ if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
+ str = yaffs_CloneString(aliasString);
+ if (!str)
+ return NULL;
+ }
- if (block > 0) {
- dev->garbageCollections++;
- if (!aggressive) {
- dev->passiveGarbageCollections++;
- }
+ in = yaffs_CreateNewObject(dev, -1, type);
- T(YAFFS_TRACE_GC,
- (TSTR
- ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
- dev->nErasedBlocks, aggressive));
+ if (!in){
+ if(str)
+ YFREE(str);
+ return NULL;
+ }
+
+
+
+
+
+ if (in) {
+ in->hdrChunk = 0;
+ in->valid = 1;
+ in->variantType = type;
+
+ in->yst_mode = mode;
+
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_WinFileTimeNow(in->win_atime);
+ in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
+ in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
+
+#else
+ in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
+
+ in->yst_rdev = rdev;
+ in->yst_uid = uid;
+ in->yst_gid = gid;
+#endif
+ in->nDataChunks = 0;
+
+ yaffs_SetObjectName(in, name);
+ in->dirty = 1;
+
+ yaffs_AddObjectToDirectory(parent, in);
+
+ in->myDev = parent->myDev;
- gcOk = yaffs_GarbageCollectBlock(dev, block);
+ 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 (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));
+ if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
+ /* Could not create the object header, fail the creation */
+ yaffs_DeleteObject(in);
+ in = NULL;
}
- } while ((dev->nErasedBlocks < dev->nReservedBlocks) && (block > 0)
- && (maxTries < 2));
- return aggressive ? gcOk : YAFFS_OK;
+ yaffs_UpdateParent(parent);
+ }
+
+ return in;
}
-/*------------------------- TAGS --------------------------------*/
+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);
+}
-static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId,
- int chunkInObject)
+yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
+ __u32 mode, __u32 uid, __u32 gid)
{
- return (tags->chunkId == chunkInObject &&
- tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 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)
+{
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
+ uid, gid, NULL, NULL, rdev);
}
+yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
+ __u32 mode, __u32 uid, __u32 gid,
+ const YCHAR *alias)
+{
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
+ uid, gid, NULL, alias, 0);
+}
-/*-------------------- Data file manipulation -----------------*/
+/* yaffs_Link returns the object id of the equivalent object.*/
+yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
+ yaffs_Object *equivalentObject)
+{
+ /* Get the real object in case we were fed a hard link as an equivalent object */
+ equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
+
+ if (yaffs_MknodObject
+ (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
+ equivalentObject, NULL, 0)) {
+ return equivalentObject;
+ } else {
+ return NULL;
+ }
+
+}
-static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode,
- yaffs_ExtendedTags * tags)
+static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
+ const YCHAR *newName, int force, int shadows)
{
- /*Get the Tnode, then get the level 0 offset chunk offset */
- yaffs_Tnode *tn;
- int theChunk = -1;
- yaffs_ExtendedTags localTags;
- int retVal = -1;
+ int unlinkOp;
+ int deleteOp;
- yaffs_Device *dev = in->myDev;
+ yaffs_Object *existingTarget;
- if (!tags) {
- /* Passed a NULL, so use our own tags space */
- tags = &localTags;
+ if (newDir == NULL)
+ newDir = obj->parent; /* use the old directory */
+
+ if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+ ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
+ TENDSTR)));
+ YBUG();
}
- tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
+ /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
+ if (obj->myDev->param.isYaffs2)
+ unlinkOp = (newDir == obj->myDev->unlinkedDir);
+ else
+ unlinkOp = (newDir == obj->myDev->unlinkedDir
+ && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
- if (tn) {
- theChunk =
- tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] <<
- dev->chunkGroupBits;
+ deleteOp = (newDir == obj->myDev->deletedDir);
- retVal =
- yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
- chunkInInode);
+ existingTarget = yaffs_FindObjectByName(newDir, newName);
+
+ /* If the object is a file going into the unlinked directory,
+ * then it is OK to just stuff it in since duplicate names are allowed.
+ * else only proceed if the new name does not exist and if we're putting
+ * it into a directory.
+ */
+ if ((unlinkOp ||
+ deleteOp ||
+ force ||
+ (shadows > 0) ||
+ !existingTarget) &&
+ newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
+ yaffs_SetObjectName(obj, newName);
+ obj->dirty = 1;
+
+ yaffs_AddObjectToDirectory(newDir, obj);
+
+ if (unlinkOp)
+ obj->unlinked = 1;
+
+ /* If it is a deletion then we mark it as a shrink for gc purposes. */
+ if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
+ return YAFFS_OK;
}
- return retVal;
+
+ return YAFFS_FAIL;
}
-static int yaffs_FindAndDeleteChunkInFile(yaffs_Object * in, int chunkInInode,
- yaffs_ExtendedTags * tags)
+int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
+ yaffs_Object *newDir, const YCHAR *newName)
{
- /* Get the Tnode, then get the level 0 offset chunk offset */
- yaffs_Tnode *tn;
- int theChunk = -1;
- yaffs_ExtendedTags localTags;
+ yaffs_Object *obj = NULL;
+ yaffs_Object *existingTarget = NULL;
+ int force = 0;
+ int result;
+ yaffs_Device *dev;
- yaffs_Device *dev = in->myDev;
- int retVal = -1;
- if (!tags) {
- /* Passed a NULL, so use our own tags space */
- tags = &localTags;
+ if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
+ if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
+
+ dev = oldDir->myDev;
+
+#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
+ /* Special case for case insemsitive systems (eg. WinCE).
+ * While look-up is case insensitive, the name isn't.
+ * Therefore we might want to change x.txt to X.txt
+ */
+ if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
+ force = 1;
+#endif
+
+ if(yaffs_strnlen(newName,YAFFS_MAX_NAME_LENGTH+1) > 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.
+ *
+ * Note we must disable gc otherwise it can mess up the shadowing.
+ *
+ */
+ dev->isDoingGC=1;
+ yaffs_ChangeObjectName(obj, newDir, newName, force,
+ existingTarget->objectId);
+ existingTarget->isShadowed = 1;
+ yaffs_UnlinkObject(existingTarget);
+ dev->isDoingGC=0;
+ }
+
+ result = yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
+
+ yaffs_UpdateParent(oldDir);
+ if(newDir != oldDir)
+ yaffs_UpdateParent(newDir);
+
+ return result;
}
+ return YAFFS_FAIL;
+}
- tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
+/*------------------------- Block Management and Page Allocation ----------------*/
- if (tn) {
+static int yaffs_InitialiseBlocks(yaffs_Device *dev)
+{
+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
+
+ dev->blockInfo = NULL;
+ dev->chunkBits = NULL;
+
+ dev->allocationBlock = -1; /* force it to get a new one */
+
+ /* If the first allocation strategy fails, thry the alternate one */
+ dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
+ if (!dev->blockInfo) {
+ dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
+ dev->blockInfoAlt = 1;
+ } else
+ dev->blockInfoAlt = 0;
+
+ if (dev->blockInfo) {
+ /* Set up dynamic blockinfo stuff. */
+ dev->chunkBitmapStride = (dev->param.nChunksPerBlock + 7) / 8; /* round up bytes */
+ dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
+ if (!dev->chunkBits) {
+ dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
+ dev->chunkBitsAlt = 1;
+ } else
+ dev->chunkBitsAlt = 0;
+ }
+
+ if (dev->blockInfo && dev->chunkBits) {
+ memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
+ memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
+ return YAFFS_OK;
+ }
+
+ return YAFFS_FAIL;
+}
+
+static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
+{
+ if (dev->blockInfoAlt && dev->blockInfo)
+ YFREE_ALT(dev->blockInfo);
+ else if (dev->blockInfo)
+ YFREE(dev->blockInfo);
+
+ dev->blockInfoAlt = 0;
+
+ dev->blockInfo = NULL;
+
+ if (dev->chunkBitsAlt && dev->chunkBits)
+ YFREE_ALT(dev->chunkBits);
+ else if (dev->chunkBits)
+ YFREE(dev->chunkBits);
+ dev->chunkBitsAlt = 0;
+ dev->chunkBits = NULL;
+}
+
+static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
+ yaffs_BlockInfo *bi)
+{
+
+ if (!dev->param.isYaffs2)
+ return 1; /* disqualification only applies to yaffs2. */
+
+ if (!bi->hasShrinkHeader)
+ return 1; /* can gc */
+
+ yaffs_FindOldestDirtySequence(dev);
+
+ /* Can't do gc of this block if there are any blocks older than this one that have
+ * discarded pages.
+ */
+ return (bi->sequenceNumber <= dev->oldestDirtySequence);
+}
+
+/*
+ * yaffs_FindRefreshBlock()
+ * periodically finds the oldest full block by sequence number for refreshing.
+ * Only for yaffs2.
+ */
+static __u32 yaffs_FindRefreshBlock(yaffs_Device *dev)
+{
+ __u32 b ;
+
+ __u32 oldest = 0;
+ __u32 oldestSequence = 0;
+
+ yaffs_BlockInfo *bi;
+
+ /*
+ * If refresh period < 10 then refreshing is disabled.
+ */
+ if(dev->param.refreshPeriod < 10 ||
+ !dev->param.isYaffs2)
+ return oldest;
+
+ /*
+ * Fix broken values.
+ */
+ if(dev->refreshSkip > dev->param.refreshPeriod)
+ dev->refreshSkip = dev->param.refreshPeriod;
+
+ if(dev->refreshSkip > 0){
+ dev->refreshSkip--;
+ return oldest;
+ }
+
+ /*
+ * Refresh skip is now zero.
+ * We'll do a refresh this time around....
+ * Update the refresh skip and find the oldest block.
+ */
+ dev->refreshSkip = dev->param.refreshPeriod;
+ dev->refreshCount++;
+ bi = dev->blockInfo;
+ for (b = dev->internalStartBlock; b <=dev->internalEndBlock; b++){
+
+ if (bi->blockState == YAFFS_BLOCK_STATE_FULL){
+
+ if(oldest < 1 ||
+ bi->sequenceNumber < oldestSequence){
+ oldest = b;
+ oldestSequence = bi->sequenceNumber;
+ }
+ }
+ bi++;
+ }
+
+ if (oldest > 0) {
+ T(YAFFS_TRACE_GC,
+ (TSTR("GC refresh count %d selected block %d with sequenceNumber %d" TENDSTR),
+ dev->refreshCount, oldest, oldestSequence));
+ }
+
+ return oldest;
+}
+
+/*
+ * FindDiretiestBlock is used to select the dirtiest block (or close enough)
+ * for garbage collection.
+ */
+
+static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
+ int aggressive)
+{
+ int b = dev->currentDirtyChecker;
+
+ int i;
+ int iterations;
+ int dirtiest = -1;
+ int pagesInUse = 0;
+ int prioritised = 0;
+ yaffs_BlockInfo *bi;
+ int pendingPrioritisedExist = 0;
+
+ /* First let's see if we need to grab a prioritised block */
+ if (dev->hasPendingPrioritisedGCs) {
+ bi = dev->blockInfo;
+ for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; 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 */
+ }
+ }
+ bi++;
+ }
+
+ if (!pendingPrioritisedExist) /* None found, so we can clear this */
+ dev->hasPendingPrioritisedGCs = 0;
+ }
+
+ /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
+ * search harder.
+ * else (we're doing a leasurely gc), then we only bother to do this if the
+ * block has only a few pages in use.
+ */
+
+ dev->nonAggressiveSkip--;
+
+ if (!aggressive && (dev->nonAggressiveSkip > 0))
+ return -1;
+
+ if (!prioritised)
+ pagesInUse =
+ (aggressive) ? dev->param.nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
+
+ if (aggressive)
+ iterations =
+ dev->internalEndBlock - dev->internalStartBlock + 1;
+ else {
+ iterations =
+ dev->internalEndBlock - dev->internalStartBlock + 1;
+ iterations = iterations / 16;
+ if (iterations > 200)
+ iterations = 200;
+ }
+
+ for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
+ b++;
+ if (b < dev->internalStartBlock || b > dev->internalEndBlock)
+ b = dev->internalStartBlock;
+
+ if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("**>> Block %d is not valid" TENDSTR), b));
+ YBUG();
+ }
+
+ bi = yaffs_GetBlockInfo(dev, b);
+
+ if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+ (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
+ yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
+ dirtiest = b;
+ pagesInUse = (bi->pagesInUse - bi->softDeletions);
+ }
+ }
+
+ dev->currentDirtyChecker = b;
+
+ if (dirtiest > 0) {
+ T(YAFFS_TRACE_GC,
+ (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
+ dev->param.nChunksPerBlock - pagesInUse, prioritised));
+ }
+
+ if (dirtiest > 0)
+ dev->nonAggressiveSkip = 4;
+
+ return dirtiest;
+}
+
+static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
+{
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
+
+ int erasedOk = 0;
+
+ /* If the block is still healthy erase it and mark as clean.
+ * If the block has had a data failure, then retire it.
+ */
+
+ T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
+ (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
+ blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
+
+ yaffs_ClearOldestDirtySequence(dev,bi);
+
+ bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
+
+ if (!bi->needsRetiring) {
+ yaffs_InvalidateCheckpoint(dev);
+ erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
+ if (!erasedOk) {
+ dev->nErasureFailures++;
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
+ }
+ }
+
+ if (erasedOk &&
+ ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
+ int i;
+ for (i = 0; i < dev->param.nChunksPerBlock; i++) {
+ if (!yaffs_CheckChunkErased
+ (dev, blockNo * dev->param.nChunksPerBlock + i)) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ (">>Block %d erasure supposedly OK, but chunk %d not erased"
+ TENDSTR), blockNo, i));
+ }
+ }
+ }
+
+ if (erasedOk) {
+ /* Clean it up... */
+ bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
+ bi->sequenceNumber = 0;
+ dev->nErasedBlocks++;
+ bi->pagesInUse = 0;
+ bi->softDeletions = 0;
+ bi->hasShrinkHeader = 0;
+ bi->skipErasedCheck = 1; /* This is clean, so no need to check */
+ bi->gcPrioritise = 0;
+ yaffs_ClearChunkBits(dev, blockNo);
+
+ T(YAFFS_TRACE_ERASE,
+ (TSTR("Erased block %d" TENDSTR), blockNo));
+ } else {
+ dev->nFreeChunks -= dev->param.nChunksPerBlock; /* We lost a block of free space */
+
+ yaffs_RetireBlock(dev, blockNo);
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("**>> Block %d retired" TENDSTR), blockNo));
+ }
+}
+
+static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
+{
+ int i;
+
+ yaffs_BlockInfo *bi;
+
+ if (dev->nErasedBlocks < 1) {
+ /* Hoosterman we've got a problem.
+ * Can't get space to gc
+ */
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
+
+ return -1;
+ }
+
+ /* Find an empty block. */
+
+ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+ dev->allocationBlockFinder++;
+ if (dev->allocationBlockFinder < dev->internalStartBlock
+ || dev->allocationBlockFinder > dev->internalEndBlock) {
+ dev->allocationBlockFinder = dev->internalStartBlock;
+ }
+
+ bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
+
+ if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
+ bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
+ dev->sequenceNumber++;
+ bi->sequenceNumber = dev->sequenceNumber;
+ dev->nErasedBlocks--;
+ T(YAFFS_TRACE_ALLOCATE,
+ (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
+ dev->allocationBlockFinder, dev->sequenceNumber,
+ dev->nErasedBlocks));
+ return dev->allocationBlockFinder;
+ }
+ }
+
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+ ("yaffs tragedy: no more erased blocks, but there should have been %d"
+ TENDSTR), dev->nErasedBlocks));
+
+ return -1;
+}
+
+
+
+static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
+{
+ if (!dev->nCheckpointBlocksRequired &&
+ dev->param.isYaffs2) {
+ /* Not a valid value so recalculate */
+ int nBytes = 0;
+ int nBlocks;
+ int devBlocks = (dev->param.endBlock - dev->param.startBlock + 1);
+ int tnodeSize = yaffs_CalcTnodeSize(dev);
+
+ 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->param.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 nChunks)
+{
+ int reservedChunks;
+ int reservedBlocks = dev->param.nReservedBlocks;
+ int checkpointBlocks;
+
+ if (dev->param.isYaffs2) {
+ checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
+ dev->blocksInCheckpoint;
+ if (checkpointBlocks < 0)
+ checkpointBlocks = 0;
+ } else {
+ checkpointBlocks = 0;
+ }
+
+ reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->param.nChunksPerBlock);
+
+ return (dev->nFreeChunks > (reservedChunks + nChunks));
+}
+
+static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
+ yaffs_BlockInfo **blockUsedPtr)
+{
+ int retVal;
+ yaffs_BlockInfo *bi;
+
+ if (dev->allocationBlock < 0) {
+ /* Get next block to allocate off */
+ dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
+ dev->allocationPage = 0;
+ }
+
+ if (!useReserve && !yaffs_CheckSpaceForAllocation(dev, 1)) {
+ /* Not enough space to allocate unless we're allowed to use the reserve. */
+ return -1;
+ }
+
+ if (dev->nErasedBlocks < dev->param.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->param.nChunksPerBlock) +
+ dev->allocationPage;
+ bi->pagesInUse++;
+ yaffs_SetChunkBit(dev, dev->allocationBlock,
+ dev->allocationPage);
+
+ dev->allocationPage++;
+
+ dev->nFreeChunks--;
+
+ /* If the block is full set the state to full */
+ if (dev->allocationPage >= dev->param.nChunksPerBlock) {
+ bi->blockState = YAFFS_BLOCK_STATE_FULL;
+ dev->allocationBlock = -1;
+ }
+
+ if (blockUsedPtr)
+ *blockUsedPtr = bi;
+
+ return retVal;
+ }
+
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
+
+ return -1;
+}
+
+static int yaffs_GetErasedChunks(yaffs_Device *dev)
+{
+ int n;
+
+ n = dev->nErasedBlocks * dev->param.nChunksPerBlock;
+
+ if (dev->allocationBlock > 0)
+ n += (dev->param.nChunksPerBlock - dev->allocationPage);
+
+ return n;
+
+}
+
+/*
+ * yaffs_SkipRestOfBlock() skips over the rest of the allocation block
+ * if we don't want to write to it.
+ */
+static void yaffs_SkipRestOfBlock(yaffs_Device *dev)
+{
+ if(dev->allocationBlock > 0){
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
+ if(bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING){
+ bi->blockState = YAFFS_BLOCK_STATE_FULL;
+ dev->allocationBlock = -1;
+ }
+ }
+}
+
+
+static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
+ int wholeBlock)
+{
+ int oldChunk;
+ int newChunk;
+ int markNAND;
+ int retVal = YAFFS_OK;
+ int cleanups = 0;
+ int i;
+ int isCheckpointBlock;
+ int matchingChunk;
+ int maxCopies;
+
+ int chunksBefore = yaffs_GetErasedChunks(dev);
+ int chunksAfter;
+
+ yaffs_ExtendedTags tags;
+
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
+
+ yaffs_Object *object;
+
+ isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
+
+
+ T(YAFFS_TRACE_TRACING,
+ (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
+ block,
+ bi->pagesInUse,
+ bi->hasShrinkHeader,
+ wholeBlock));
+
+ /*yaffs_VerifyFreeChunks(dev); */
+
+ if(bi->blockState == YAFFS_BLOCK_STATE_FULL)
+ bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
+
+ bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
+
+ /* Take off the number of soft deleted entries because
+ * they're going to get really deleted during GC.
+ */
+ if(dev->gcChunk == 0) /* first time through for this block */
+ dev->nFreeChunks -= bi->softDeletions;
+
+ dev->isDoingGC = 1;
+
+ if (isCheckpointBlock ||
+ !yaffs_StillSomeChunkBits(dev, block)) {
+ T(YAFFS_TRACE_TRACING,
+ (TSTR
+ ("Collecting block %d that has no chunks in use" TENDSTR),
+ block));
+ yaffs_BlockBecameDirty(dev, block);
+ } else {
+
+ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+
+ yaffs_VerifyBlock(dev, bi, block);
+
+ maxCopies = (wholeBlock) ? dev->param.nChunksPerBlock : 10;
+ oldChunk = block * dev->param.nChunksPerBlock + dev->gcChunk;
+
+ for (/* init already done */;
+ retVal == YAFFS_OK &&
+ dev->gcChunk < dev->param.nChunksPerBlock &&
+ (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
+ maxCopies > 0;
+ dev->gcChunk++, oldChunk++) {
+ if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
+
+ /* This page is in use and might need to be copied off */
+
+ maxCopies--;
+
+ markNAND = 1;
+
+ yaffs_InitialiseTags(&tags);
+
+ yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
+ buffer, &tags);
+
+ object =
+ yaffs_FindObjectByNumber(dev,
+ tags.objectId);
+
+ T(YAFFS_TRACE_GC_DETAIL,
+ (TSTR
+ ("Collecting chunk in block %d, %d %d %d " TENDSTR),
+ dev->gcChunk, tags.objectId, tags.chunkId,
+ tags.byteCount));
+
+ if (object && !yaffs_SkipVerification(dev)) {
+ if (tags.chunkId == 0)
+ matchingChunk = object->hdrChunk;
+ else if (object->softDeleted)
+ matchingChunk = oldChunk; /* Defeat the test */
+ else
+ matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
+
+ if (oldChunk != matchingChunk)
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
+ oldChunk, matchingChunk, tags.objectId, tags.chunkId));
+
+ }
+
+ if (!object) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("page %d in gc has no object: %d %d %d "
+ TENDSTR), oldChunk,
+ tags.objectId, tags.chunkId, tags.byteCount));
+ }
+
+ if (object &&
+ object->deleted &&
+ object->softDeleted &&
+ tags.chunkId != 0) {
+ /* Data chunk in a soft deleted file, throw it away
+ * It's a soft deleted data chunk,
+ * No need to copy this, just forget about it and
+ * fix up the object.
+ */
+
+ object->nDataChunks--;
+
+ if (object->nDataChunks <= 0) {
+ /* remeber to clean up the object */
+ dev->gcCleanupList[cleanups] =
+ tags.objectId;
+ cleanups++;
+ }
+ markNAND = 0;
+ } else if (0) {
+ /* Todo object && object->deleted && object->nDataChunks == 0 */
+ /* Deleted object header with no data chunks.
+ * Can be discarded and the file deleted.
+ */
+ object->hdrChunk = 0;
+ yaffs_FreeTnode(object->myDev,
+ object->variant.
+ fileVariant.top);
+ object->variant.fileVariant.top = NULL;
+ yaffs_DoGenericObjectDeletion(object);
+
+ } else if (object) {
+ /* It's either a data chunk in a live file or
+ * an ObjectHeader, so we're interested in it.
+ * NB Need to keep the ObjectHeaders of deleted files
+ * until the whole file has been deleted off
+ */
+ tags.serialNumber++;
+
+ dev->nGCCopies++;
+
+ if (tags.chunkId == 0) {
+ /* It is an object Id,
+ * We need to nuke the shrinkheader flags first
+ * Also need to clean up shadowing.
+ * We no longer want the shrinkHeader flag since its work is done
+ * and if it is left in place it will mess up scanning.
+ */
+
+ yaffs_ObjectHeader *oh;
+ oh = (yaffs_ObjectHeader *)buffer;
+
+ oh->isShrink = 0;
+ tags.extraIsShrinkHeader = 0;
+
+ oh->shadowsObject = 0;
+ oh->inbandShadowsObject = 0;
+ tags.extraShadows = 0;
+
+ /* Update file size */
+ if(object->variantType == YAFFS_OBJECT_TYPE_FILE){
+ oh->fileSize = object->variant.fileVariant.fileSize;
+ tags.extraFileLength = oh->fileSize;
+ }
+
+ yaffs_VerifyObjectHeader(object, oh, &tags, 1);
+ newChunk =
+ yaffs_WriteNewChunkWithTagsToNAND(dev,(__u8 *) oh, &tags, 1);
+ } else
+ 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 */
+ int ok;
+ ok = yaffs_PutChunkIntoFile
+ (object,
+ tags.chunkId,
+ newChunk, 0);
+ }
+ }
+ }
+
+ if (retVal == YAFFS_OK)
+ yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
+
+ }
+ }
+
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+
+
+ /* Do any required cleanups */
+ for (i = 0; i < cleanups; i++) {
+ /* Time to delete the file too */
+ object =
+ yaffs_FindObjectByNumber(dev,
+ dev->gcCleanupList[i]);
+ if (object) {
+ yaffs_FreeTnode(dev,
+ object->variant.fileVariant.
+ top);
+ object->variant.fileVariant.top = NULL;
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("yaffs: About to finally delete object %d"
+ TENDSTR), object->objectId));
+ yaffs_DoGenericObjectDeletion(object);
+ object->myDev->nDeletedFiles--;
+ }
+
+ }
+
+ }
+
+ yaffs_VerifyCollectedBlock(dev, bi, block);
+
+
+
+ /* If the gc completed then clear the current gcBlock so that we find another. */
+ if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
+ chunksAfter = yaffs_GetErasedChunks(dev);
+ if (chunksBefore >= chunksAfter) {
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("gc did not increase free chunks before %d after %d"
+ TENDSTR), chunksBefore, chunksAfter));
+ }
+ dev->gcBlock = -1;
+ dev->gcChunk = 0;
+ }
+
+ dev->isDoingGC = 0;
+
+ return retVal;
+}
+
+/* New garbage collector
+ * If we're very low on erased blocks then we do aggressive garbage collection
+ * otherwise we do "leasurely" garbage collection.
+ * Aggressive gc looks further (whole array) and will accept less dirty blocks.
+ * Passive gc only inspects smaller areas and will only accept more dirty blocks.
+ *
+ * The idea is to help clear out space in a more spread-out manner.
+ * Dunno if it really does anything useful.
+ */
+static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
+{
+ int block;
+ int aggressive;
+ int gcOk = YAFFS_OK;
+ int maxTries = 0;
+
+ int checkpointBlockAdjust;
+
+ if (dev->isDoingGC) {
+ /* Bail out so we don't get recursive gc */
+ return YAFFS_OK;
+ }
+
+ /* This loop should pass the first time.
+ * We'll only see looping here if the erase of the collected block fails.
+ */
+
+ do {
+ maxTries++;
+
+ checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
+ if (checkpointBlockAdjust < 0)
+ checkpointBlockAdjust = 0;
+
+ /* If we need a block soon then do aggressive gc.*/
+ if (dev->nErasedBlocks < (dev->param.nReservedBlocks + checkpointBlockAdjust + 2))
+ aggressive = 1;
+ else
+ aggressive = 0;
+
+ /* If we don't already have a block being gc'd then see if we should start another */
+
+ if (dev->gcBlock < 1 && !aggressive) {
+ dev->gcBlock = yaffs_FindRefreshBlock(dev);
+ dev->gcChunk = 0;
+ }
+ if (dev->gcBlock < 1) {
+ 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));
+
+ gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
+ }
+
+ if (dev->nErasedBlocks < (dev->param.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->param.nReservedBlocks) &&
+ (block > 0) &&
+ (maxTries < 2));
+
+ return aggressive ? gcOk : YAFFS_OK;
+}
+
+/*------------------------- TAGS --------------------------------*/
+
+static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
+ int chunkInObject)
+{
+ return (tags->chunkId == chunkInObject &&
+ tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
+
+}
+
+
+/*-------------------- Data file manipulation -----------------*/
+
+static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
+ yaffs_ExtendedTags *tags)
+{
+ /*Get the Tnode, then get the level 0 offset chunk offset */
+ yaffs_Tnode *tn;
+ int theChunk = -1;
+ yaffs_ExtendedTags localTags;
+ int retVal = -1;
+
+ yaffs_Device *dev = in->myDev;
+
+ if (!tags) {
+ /* Passed a NULL, so use our own tags space */
+ tags = &localTags;
+ }
+
+ tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
+
+ if (tn) {
+ theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+
+ retVal =
+ yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
+ chunkInInode);
+ }
+ return retVal;
+}
+
+static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
+ yaffs_ExtendedTags *tags)
+{
+ /* Get the Tnode, then get the level 0 offset chunk offset */
+ yaffs_Tnode *tn;
+ int theChunk = -1;
+ yaffs_ExtendedTags localTags;
+
+ yaffs_Device *dev = in->myDev;
+ int retVal = -1;
+
+ if (!tags) {
+ /* Passed a NULL, so use our own tags space */
+ tags = &localTags;
+ }
+
+ tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
+
+ if (tn) {
+
+ theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+
+ retVal =
+ yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
+ chunkInInode);
+
+ /* Delete the entry in the filestructure (if found) */
+ if (retVal != -1)
+ yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, 0);
+ }
+
+ return retVal;
+}
+
+#ifdef YAFFS_PARANOID
+
+static int yaffs_CheckFileSanity(yaffs_Object *in)
+{
+ int chunk;
+ int nChunks;
+ int fSize;
+ int failed = 0;
+ int objId;
+ yaffs_Tnode *tn;
+ yaffs_Tags localTags;
+ yaffs_Tags *tags = &localTags;
+ int theChunk;
+ int chunkDeleted;
+
+ if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
+ return YAFFS_FAIL;
+
+ objId = in->objectId;
+ fSize = in->variant.fileVariant.fileSize;
+ nChunks =
+ (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
+
+ for (chunk = 1; chunk <= nChunks; chunk++) {
+ tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
+ chunk);
+
+ if (tn) {
+
+ theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
+
+ if (yaffs_CheckChunkBits
+ (dev, theChunk / dev->param.nChunksPerBlock,
+ theChunk % dev->param.nChunksPerBlock)) {
+
+ yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
+ tags,
+ &chunkDeleted);
+ if (yaffs_TagsMatch
+ (tags, in->objectId, chunk, chunkDeleted)) {
+ /* found it; */
+
+ }
+ } else {
+
+ failed = 1;
+ }
+
+ } else {
+ /* T(("No level 0 found for %d\n", chunk)); */
+ }
+ }
+
+ return failed ? YAFFS_FAIL : YAFFS_OK;
+}
+
+#endif
+
+static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
+ int chunkInNAND, int inScan)
+{
+ /* NB inScan is zero unless scanning.
+ * For forward scanning, inScan is > 0;
+ * for backward scanning inScan is < 0
+ *
+ * chunkInNAND = 0 is a dummy insert to make sure the tnodes are there.
+ */
+
+ yaffs_Tnode *tn;
+ yaffs_Device *dev = in->myDev;
+ int existingChunk;
+ yaffs_ExtendedTags existingTags;
+ yaffs_ExtendedTags newTags;
+ unsigned existingSerial, newSerial;
+
+ if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
+ /* Just ignore an attempt at putting a chunk into a non-file during scanning
+ * If it is not during Scanning then something went wrong!
+ */
+ if (!inScan) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs tragedy:attempt to put data chunk into a non-file"
+ TENDSTR)));
+ YBUG();
+ }
+
+ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
+ return YAFFS_OK;
+ }
+
+ tn = yaffs_AddOrFindLevel0Tnode(dev,
+ &in->variant.fileVariant,
+ chunkInInode,
+ NULL);
+ if (!tn)
+ return YAFFS_FAIL;
+
+ if(!chunkInNAND)
+ /* Dummy insert, bail now */
+ return YAFFS_OK;
+
+ existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+
+ if (inScan != 0) {
+ /* If we're scanning then we need to test for duplicates
+ * NB This does not need to be efficient since it should only ever
+ * happen when the power fails during a write, then only one
+ * chunk should ever be affected.
+ *
+ * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
+ * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
+ */
+
+ if (existingChunk > 0) {
+ /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
+ * thus we have to do a FindChunkInFile to get the real chunk id.
+ *
+ * We have a duplicate now we need to decide which one to use:
+ *
+ * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
+ * Forward scanning YAFFS2: The new one is what we use, dump the old one.
+ * YAFFS1: Get both sets of tags and compare serial numbers.
+ */
+
+ if (inScan > 0) {
+ /* Only do this for forward scanning */
+ yaffs_ReadChunkWithTagsFromNAND(dev,
+ chunkInNAND,
+ NULL, &newTags);
+
+ /* Do a proper find */
+ existingChunk =
+ yaffs_FindChunkInFile(in, chunkInInode,
+ &existingTags);
+ }
+
+ if (existingChunk <= 0) {
+ /*Hoosterman - how did this happen? */
+
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs tragedy: existing chunk < 0 in scan"
+ TENDSTR)));
+
+ }
+
+ /* NB The deleted flags should be false, otherwise the chunks will
+ * not be loaded during a scan
+ */
+
+ if (inScan > 0) {
+ newSerial = newTags.serialNumber;
+ existingSerial = existingTags.serialNumber;
+ }
+
+ if ((inScan > 0) &&
+ (in->myDev->param.isYaffs2 ||
+ existingChunk <= 0 ||
+ ((existingSerial + 1) & 3) == newSerial)) {
+ /* Forward scanning.
+ * Use new
+ * Delete the old one and drop through to update the tnode
+ */
+ yaffs_DeleteChunk(dev, existingChunk, 1,
+ __LINE__);
+ } else {
+ /* Backward scanning or we want to use the existing one
+ * Use existing.
+ * Delete the new one and return early so that the tnode isn't changed
+ */
+ yaffs_DeleteChunk(dev, chunkInNAND, 1,
+ __LINE__);
+ return YAFFS_OK;
+ }
+ }
+
+ }
+
+ if (existingChunk == 0)
+ in->nDataChunks++;
+
+ yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
+
+ return YAFFS_OK;
+}
+
+static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
+ __u8 *buffer)
+{
+ int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
+
+ if (chunkInNAND >= 0)
+ return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
+ buffer, NULL);
+ else {
+ T(YAFFS_TRACE_NANDACCESS,
+ (TSTR("Chunk %d not found zero instead" TENDSTR),
+ chunkInNAND));
+ /* get sane (zero) data if you read a hole */
+ memset(buffer, 0, in->myDev->nDataBytesPerChunk);
+ return 0;
+ }
+
+}
+
+void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
+{
+ int block;
+ int page;
+ yaffs_ExtendedTags tags;
+ yaffs_BlockInfo *bi;
+
+ if (chunkId <= 0)
+ return;
+
+ dev->nDeletions++;
+ block = chunkId / dev->param.nChunksPerBlock;
+ page = chunkId % dev->param.nChunksPerBlock;
+
+
+ if (!yaffs_CheckChunkBit(dev, block, page))
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Deleting invalid chunk %d"TENDSTR),
+ chunkId));
+
+ bi = yaffs_GetBlockInfo(dev, block);
+
+ yaffs_UpdateOldestDirtySequence(dev,bi);
+
+ T(YAFFS_TRACE_DELETION,
+ (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
+
+ if (markNAND &&
+ bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->param.isYaffs2) {
+
+ yaffs_InitialiseTags(&tags);
+
+ tags.chunkDeleted = 1;
+
+ yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
+ yaffs_HandleUpdateChunk(dev, chunkId, &tags);
+ } else {
+ dev->nUnmarkedDeletions++;
+ }
+
+ /* Pull out of the management area.
+ * If the whole block became dirty, this will kick off an erasure.
+ */
+ if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
+ bi->blockState == YAFFS_BLOCK_STATE_FULL ||
+ bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+ bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
+ dev->nFreeChunks++;
+
+ yaffs_ClearChunkBit(dev, block, page);
+
+ bi->pagesInUse--;
+
+ if (bi->pagesInUse == 0 &&
+ !bi->hasShrinkHeader &&
+ bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
+ bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+ yaffs_BlockBecameDirty(dev, block);
+ }
+
+ }
+
+}
+
+static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
+ const __u8 *buffer, int nBytes,
+ int useReserve)
+{
+ /* Find old chunk Need to do this to get serial number
+ * Write new one and patch into tree.
+ * Invalidate old tags.
+ */
+
+ int prevChunkId;
+ yaffs_ExtendedTags prevTags;
+
+ int newChunkId;
+ yaffs_ExtendedTags newTags;
+
+ yaffs_Device *dev = in->myDev;
+
+ yaffs_CheckGarbageCollection(dev);
+
+ /* Get the previous chunk at this location in the file if it exists.
+ * If it does not exist then put a zero into the tree. This creates
+ * the tnode now, rather than later when it is harder to clean up.
+ */
+ prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
+ if(prevChunkId < 1 &&
+ !yaffs_PutChunkIntoFile(in, chunkInInode, 0, 0))
+ return 0;
+
+ /* Set up new tags */
+ yaffs_InitialiseTags(&newTags);
+
+ newTags.chunkId = chunkInInode;
+ newTags.objectId = in->objectId;
+ newTags.serialNumber =
+ (prevChunkId > 0) ? prevTags.serialNumber + 1 : 1;
+ newTags.byteCount = nBytes;
+
+ if (nBytes < 1 || nBytes > dev->param.totalBytesPerChunk) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
+ YBUG();
+ }
+
+
+ newChunkId =
+ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
+ useReserve);
+
+ 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;
+ YCHAR *alias = NULL;
+
+ __u8 *buffer = NULL;
+ YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
+
+ 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->nDataBytesPerChunk);
+
+ oh->type = in->variantType;
+ 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[0] = in->win_ctime[0];
+ oh->win_mtime[0] = in->win_mtime[0];
+ oh->win_atime[1] = in->win_atime[1];
+ oh->win_ctime[1] = in->win_ctime[1];
+ oh->win_mtime[1] = in->win_mtime[1];
+#else
+ oh->yst_uid = in->yst_uid;
+ oh->yst_gid = in->yst_gid;
+ oh->yst_atime = in->yst_atime;
+ oh->yst_mtime = in->yst_mtime;
+ oh->yst_ctime = in->yst_ctime;
+ oh->yst_rdev = in->yst_rdev;
+#endif
+ if (in->parent)
+ oh->parentObjectId = in->parent->objectId;
+ else
+ oh->parentObjectId = 0;
+
+ if (name && *name) {
+ memset(oh->name, 0, sizeof(oh->name));
+ yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
+ } else if (prevChunkId > 0)
+ memcpy(oh->name, oldName, sizeof(oh->name));
+ else
+ memset(oh->name, 0, sizeof(oh->name));
+
+ oh->isShrink = isShrink;
+
+ switch (in->variantType) {
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ /* Should not happen */
+ break;
+ case YAFFS_OBJECT_TYPE_FILE:
+ oh->fileSize =
+ (oh->parentObjectId == YAFFS_OBJECTID_DELETED
+ || oh->parentObjectId ==
+ YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
+ fileVariant.fileSize;
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ oh->equivalentObjectId =
+ in->variant.hardLinkVariant.equivalentObjectId;
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ alias = in->variant.symLinkVariant.alias;
+ if(!alias)
+ alias = _Y("no alias");
+ yaffs_strncpy(oh->alias,
+ alias,
+ YAFFS_MAX_ALIAS_LENGTH);
+ oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
+ break;
+ }
+
+ /* Tags */
+ yaffs_InitialiseTags(&newTags);
+ in->serial++;
+ newTags.chunkId = 0;
+ newTags.objectId = in->objectId;
+ newTags.serialNumber = in->serial;
+
+ /* Add extra info for file header */
+
+ newTags.extraHeaderInfoAvailable = 1;
+ newTags.extraParentObjectId = oh->parentObjectId;
+ newTags.extraFileLength = oh->fileSize;
+ newTags.extraIsShrinkHeader = oh->isShrink;
+ newTags.extraEquivalentObjectId = oh->equivalentObjectId;
+ newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
+ newTags.extraObjectType = in->variantType;
+
+ yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
+
+ /* Create new chunk in NAND */
+ newChunkId =
+ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
+ (prevChunkId > 0) ? 1 : 0);
+
+ if (newChunkId >= 0) {
+
+ in->hdrChunk = newChunkId;
+
+ if (prevChunkId > 0) {
+ yaffs_DeleteChunk(dev, prevChunkId, 1,
+ __LINE__);
+ }
+
+ if (!yaffs_ObjectHasCachedWriteData(in))
+ in->dirty = 0;
+
+ /* If this was a shrink, then mark the block that the chunk lives on */
+ if (isShrink) {
+ bi = yaffs_GetBlockInfo(in->myDev,
+ newChunkId / in->myDev->param.nChunksPerBlock);
+ bi->hasShrinkHeader = 1;
+ }
- theChunk =
- tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] << dev->
- chunkGroupBits;
+ }
- retVal =
- yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
- chunkInInode);
+ retVal = newChunkId;
- /* Delete the entry in the filestructure (if found) */
- if (retVal != -1) {
- tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = 0;
- }
- } else {
- /*T(("No level 0 found for %d\n", chunkInInode)); */
}
- if (retVal == -1) {
- /* T(("Could not find %d to delete\n",chunkInInode)); */
- }
+ if (buffer)
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+
return retVal;
}
-#ifdef YAFFS_PARANOID
+/*------------------------ 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_CheckFileSanity(yaffs_Object * in)
+static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
{
- int chunk;
- int nChunks;
- int fSize;
- int failed = 0;
- int objId;
- yaffs_Tnode *tn;
- yaffs_Tags localTags;
- yaffs_Tags *tags = &localTags;
- int theChunk;
- int chunkDeleted;
+ yaffs_Device *dev = obj->myDev;
+ int i;
+ yaffs_ChunkCache *cache;
+ int nCaches = obj->myDev->param.nShortOpCaches;
- if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
- /* T(("Object not a file\n")); */
- return YAFFS_FAIL;
+ for (i = 0; i < nCaches; i++) {
+ cache = &dev->srCache[i];
+ if (cache->object == obj &&
+ cache->dirty)
+ return 1;
}
- 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) {
+ return 0;
+}
- theChunk =
- tn->level0[chunk & YAFFS_TNODES_LEVEL0_MASK] << in->
- myDev->chunkGroupBits;
- if (yaffs_CheckChunkBits
- (dev, theChunk / dev->nChunksPerBlock,
- theChunk % dev->nChunksPerBlock)) {
+static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
+{
+ yaffs_Device *dev = obj->myDev;
+ int lowest = -99; /* Stop compiler whining. */
+ int i;
+ yaffs_ChunkCache *cache;
+ int chunkWritten = 0;
+ int nCaches = obj->myDev->param.nShortOpCaches;
- yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
- tags,
- &chunkDeleted);
- if (yaffs_TagsMatch
- (tags, in->objectId, chunk, chunkDeleted)) {
- /* found it; */
+ if (nCaches > 0) {
+ do {
+ cache = NULL;
+ /* Find the dirty cache for this object with the lowest chunk id. */
+ for (i = 0; i < nCaches; i++) {
+ if (dev->srCache[i].object == obj &&
+ dev->srCache[i].dirty) {
+ if (!cache
+ || dev->srCache[i].chunkId <
+ lowest) {
+ cache = &dev->srCache[i];
+ lowest = cache->chunkId;
+ }
}
- } else {
+ }
- failed = 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;
}
- } else {
- /* T(("No level 0 found for %d\n", chunk)); */
+ } 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)));
+
}
}
- return failed ? YAFFS_FAIL : YAFFS_OK;
}
-#endif
+/*yaffs_FlushEntireDeviceCache(dev)
+ *
+ *
+ */
-static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode,
- int chunkInNAND, int inScan)
+void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
{
- /* NB inScan is zero unless scanning.
- * For forward scanning, inScan is > 0;
- * for backward scanning inScan is < 0
+ yaffs_Object *obj;
+ int nCaches = dev->param.nShortOpCaches;
+ int i;
+
+ /* Find a dirty object in the cache and flush it...
+ * until there are no further dirty objects.
*/
-
- yaffs_Tnode *tn;
- yaffs_Device *dev = in->myDev;
- int existingChunk;
- yaffs_ExtendedTags existingTags;
- yaffs_ExtendedTags newTags;
- unsigned existingSerial, newSerial;
+ do {
+ obj = NULL;
+ for (i = 0; i < nCaches && !obj; i++) {
+ if (dev->srCache[i].object &&
+ dev->srCache[i].dirty)
+ obj = dev->srCache[i].object;
- if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
- /* Just ignore an attempt at putting a chunk into a non-file during scanning
- * If it is not during Scanning then something went wrong!
- */
- if (!inScan) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy:attempt to put data chunk into a non-file"
- TENDSTR)));
- YBUG();
}
+ if (obj)
+ yaffs_FlushFilesChunkCache(obj);
- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
- return YAFFS_OK;
- }
-
- tn = yaffs_AddOrFindLevel0Tnode(dev, &in->variant.fileVariant,
- chunkInInode);
- if (!tn) {
- return YAFFS_FAIL;
- }
+ } while (obj);
- existingChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK];
+}
- 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.
- */
+/* 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 (inScan > 0) {
- /* Only do this for forward scanning */
- yaffs_ReadChunkWithTagsFromNAND(dev,
- chunkInNAND,
- NULL, &newTags);
+ if (dev->param.nShortOpCaches > 0) {
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
+ if (!dev->srCache[i].object)
+ return &dev->srCache[i];
+ }
+ }
- /* Do a proper find */
- existingChunk =
- yaffs_FindChunkInFile(in, chunkInInode,
- &existingTags);
- }
+ return NULL;
+}
- if (existingChunk <= 0) {
- /*Hoosterman - how did this happen? */
+static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
+{
+ yaffs_ChunkCache *cache;
+ yaffs_Object *theObj;
+ int usage;
+ int i;
+ int pushout;
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy: existing chunk < 0 in scan"
- TENDSTR)));
+ if (dev->param.nShortOpCaches > 0) {
+ /* Try find a non-dirty one... */
- }
+ cache = yaffs_GrabChunkCacheWorker(dev);
- /* NB The deleted flags should be false, otherwise the chunks will
- * not be loaded during a scan
+ 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.
*/
- newSerial = newTags.serialNumber;
- existingSerial = existingTags.serialNumber;
+ /* With locking we can't assume we can use entry zero */
- 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;
- }
- }
+ theObj = NULL;
+ usage = -1;
+ cache = NULL;
+ pushout = -1;
- }
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
+ if (dev->srCache[i].object &&
+ !dev->srCache[i].locked &&
+ (dev->srCache[i].lastUse < usage || !cache)) {
+ usage = dev->srCache[i].lastUse;
+ theObj = dev->srCache[i].object;
+ cache = &dev->srCache[i];
+ pushout = i;
+ }
+ }
- if (existingChunk == 0) {
- in->nDataChunks++;
- }
+ if (!cache || cache->dirty) {
+ /* Flush and try again */
+ yaffs_FlushFilesChunkCache(theObj);
+ cache = yaffs_GrabChunkCacheWorker(dev);
+ }
- tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] =
- (chunkInNAND >> dev->chunkGroupBits);
+ }
+ return cache;
+ } else
+ return NULL;
- return YAFFS_OK;
}
-static int yaffs_ReadChunkDataFromObject(yaffs_Object * in, int chunkInInode,
- __u8 * buffer)
+/* Find a cached chunk */
+static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
+ int chunkId)
{
- int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
-
- if (chunkInNAND >= 0) {
- return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
- buffer, NULL);
- } else {
- T(YAFFS_TRACE_NANDACCESS,
- (TSTR("Chunk %d not found zero instead" TENDSTR),
- chunkInNAND));
- /* get sane (zero) data if you read a hole */
- memset(buffer, 0, in->myDev->nBytesPerChunk);
- return 0;
- }
+ yaffs_Device *dev = obj->myDev;
+ int i;
+ if (dev->param.nShortOpCaches > 0) {
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
+ if (dev->srCache[i].object == obj &&
+ dev->srCache[i].chunkId == chunkId) {
+ dev->cacheHits++;
+ return &dev->srCache[i];
+ }
+ }
+ }
+ return NULL;
}
-void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn)
+/* Mark the chunk for the least recently used algorithym */
+static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
+ int isAWrite)
{
- int block;
- int page;
- yaffs_ExtendedTags tags;
- yaffs_BlockInfo *bi;
-
- if (chunkId <= 0)
- return;
- dev->nDeletions++;
- block = chunkId / dev->nChunksPerBlock;
- page = chunkId % dev->nChunksPerBlock;
+ if (dev->param.nShortOpCaches > 0) {
+ if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
+ /* Reset the cache usages */
+ int i;
+ for (i = 1; i < dev->param.nShortOpCaches; i++)
+ dev->srCache[i].lastUse = 0;
- bi = yaffs_GetBlockInfo(dev, block);
+ dev->srLastUse = 0;
+ }
- T(YAFFS_TRACE_DELETION,
- (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
+ dev->srLastUse++;
- if (markNAND &&
- bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
+ cache->lastUse = dev->srLastUse;
-#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
+ if (isAWrite)
+ cache->dirty = 1;
+ }
+}
- /* Read data before write, to ensure correct ecc
- * if we're using MTD verification under Linux
- */
- yaffs_ReadChunkFromNAND(dev, chunkId, NULL, &spare, 0);
-#endif
+/* Invalidate a single cache page.
+ * Do this when a whole page gets written,
+ * ie the short cache for this page is no longer valid.
+ */
+static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
+{
+ if (object->myDev->param.nShortOpCaches > 0) {
+ yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
- yaffs_InitialiseTags(&tags);
+ if (cache)
+ cache->object = NULL;
+ }
+}
- tags.chunkDeleted = 1;
+/* 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;
- yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
- yaffs_HandleUpdateChunk(dev, chunkId, &tags);
- } else {
- dev->nUnmarkedDeletions++;
+ if (dev->param.nShortOpCaches > 0) {
+ /* Invalidate it. */
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
+ if (dev->srCache[i].object == in)
+ dev->srCache[i].object = NULL;
+ }
}
+}
- /* Pull out of the management area.
- * If the whole block became dirty, this will kick off an erasure.
- */
- if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
- bi->blockState == YAFFS_BLOCK_STATE_FULL ||
- bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
- bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
- dev->nFreeChunks++;
+/*--------------------- Checkpointing --------------------*/
- yaffs_ClearChunkBit(dev, block, page);
- bi->pagesInUse--;
+static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
+{
+ yaffs_CheckpointValidity cp;
- if (bi->pagesInUse == 0 &&
- !bi->hasShrinkHeader &&
- bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
- bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- yaffs_BlockBecameDirty(dev, block);
- }
+ memset(&cp, 0, sizeof(cp));
- } else {
- /* T(("Bad news deleting chunk %d\n",chunkId)); */
- }
+ cp.structType = sizeof(cp);
+ cp.magic = YAFFS_MAGIC;
+ cp.version = YAFFS_CHECKPOINT_VERSION;
+ cp.head = (head) ? 1 : 0;
+ return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
+ 1 : 0;
}
-static int yaffs_WriteChunkDataToObject(yaffs_Object * in, int chunkInInode,
- const __u8 * buffer, int nBytes,
- int useReserve)
+static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
{
- /* Find old chunk Need to do this to get serial number
- * Write new one and patch into tree.
- * Invalidate old tags.
- */
+ yaffs_CheckpointValidity cp;
+ int ok;
- int prevChunkId;
- yaffs_ExtendedTags prevTags;
+ ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
- int newChunkId;
- yaffs_ExtendedTags newTags;
+ 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;
+}
- yaffs_Device *dev = in->myDev;
+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;
- yaffs_CheckGarbageCollection(dev);
+ cp->nDeletedFiles = dev->nDeletedFiles;
+ cp->nUnlinkedFiles = dev->nUnlinkedFiles;
+ cp->nBackgroundDeletions = dev->nBackgroundDeletions;
+ cp->sequenceNumber = dev->sequenceNumber;
- /* 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);
+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;
- newTags.chunkId = chunkInInode;
- newTags.objectId = in->objectId;
- newTags.serialNumber =
- (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1;
- newTags.byteCount = nBytes;
+ dev->nDeletedFiles = cp->nDeletedFiles;
+ dev->nUnlinkedFiles = cp->nUnlinkedFiles;
+ dev->nBackgroundDeletions = cp->nBackgroundDeletions;
+ dev->sequenceNumber = cp->sequenceNumber;
+}
- newChunkId =
- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
- useReserve);
- if (newChunkId >= 0) {
- yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
+static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
+{
+ yaffs_CheckpointDevice cp;
+ __u32 nBytes;
+ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
- if (prevChunkId >= 0) {
- yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
+ int ok;
- }
+ /* Write device runtime values*/
+ yaffs_DeviceToCheckpointDevice(&cp, dev);
+ cp.structType = sizeof(cp);
- yaffs_CheckFileSanity(in);
+ 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);
}
- return newChunkId;
+
+ /* Write chunk bits */
+ if (ok) {
+ nBytes = nBlocks * dev->chunkBitmapStride;
+ ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
+ }
+ return ok ? 1 : 0;
}
-/* UpdateObjectHeader updates the header on NAND for an object.
- * If name is not NULL, then that new name is used.
- */
-int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force,
- int isShrink, int shadows)
+static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
{
+ yaffs_CheckpointDevice cp;
+ __u32 nBytes;
+ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
- yaffs_BlockInfo *bi;
-
- yaffs_Device *dev = in->myDev;
-
- int prevChunkId;
- int retVal = 0;
-
- int newChunkId;
- yaffs_ExtendedTags newTags;
+ int ok;
- __u8 *buffer = NULL;
- YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
+ ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+ if (!ok)
+ return 0;
- yaffs_ObjectHeader *oh = NULL;
+ if (cp.structType != sizeof(cp))
+ return 0;
- if (!in->fake || force) {
- yaffs_CheckGarbageCollection(dev);
+ yaffs_CheckpointDeviceToDevice(dev, &cp);
- buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
- oh = (yaffs_ObjectHeader *) buffer;
+ nBytes = nBlocks * sizeof(yaffs_BlockInfo);
- prevChunkId = in->chunkId;
+ ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
- if (prevChunkId >= 0) {
- yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
- buffer, NULL);
- memcpy(oldName, oh->name, sizeof(oh->name));
- }
+ if (!ok)
+ return 0;
+ nBytes = nBlocks * dev->chunkBitmapStride;
- memset(buffer, 0xFF, dev->nBytesPerChunk);
+ ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
- oh->type = in->variantType;
- oh->yst_mode = in->yst_mode;
- oh->shadowsObject = shadows;
+ return ok ? 1 : 0;
+}
-#ifdef CONFIG_YAFFS_WINCE
- oh->win_atime[0] = in->win_atime[0];
- oh->win_ctime[0] = in->win_ctime[0];
- oh->win_mtime[0] = in->win_mtime[0];
- oh->win_atime[1] = in->win_atime[1];
- oh->win_ctime[1] = in->win_ctime[1];
- oh->win_mtime[1] = in->win_mtime[1];
-#else
- oh->yst_uid = in->yst_uid;
- oh->yst_gid = in->yst_gid;
- oh->yst_atime = in->yst_atime;
- oh->yst_mtime = in->yst_mtime;
- oh->yst_ctime = in->yst_ctime;
- oh->yst_rdev = in->yst_rdev;
-#endif
- if (in->parent) {
- oh->parentObjectId = in->parent->objectId;
- } else {
- oh->parentObjectId = 0;
- }
+static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
+ yaffs_Object *obj)
+{
- 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));
- }
+ 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;
- oh->isShrink = isShrink;
+ 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;
+}
- 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;
- }
+static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
+{
- /* Tags */
- yaffs_InitialiseTags(&newTags);
- in->serial++;
- newTags.chunkId = 0;
- newTags.objectId = in->objectId;
- newTags.serialNumber = in->serial;
+ yaffs_Object *parent;
- /* Add extra info for file header */
+ if (obj->variantType != cp->variantType) {
+ T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
+ TCONT("chunk %d does not match existing object type %d")
+ TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
+ obj->variantType));
+ return 0;
+ }
- 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;
+ obj->objectId = cp->objectId;
- /* Create new chunk in NAND */
- newChunkId =
- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
- (prevChunkId >= 0) ? 1 : 0);
+ if (cp->parentId)
+ parent = yaffs_FindOrCreateObjectByNumber(
+ obj->myDev,
+ cp->parentId,
+ YAFFS_OBJECT_TYPE_DIRECTORY);
+ else
+ parent = NULL;
+
+ if (parent) {
+ if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
+ TCONT(" chunk %d Parent type, %d, not directory")
+ TENDSTR),
+ cp->objectId, cp->parentId, cp->variantType,
+ cp->hdrChunk, parent->variantType));
+ return 0;
+ }
+ yaffs_AddObjectToDirectory(parent, obj);
+ }
+
+ obj->hdrChunk = cp->hdrChunk;
+ obj->variantType = cp->variantType;
+ obj->deleted = cp->deleted;
+ obj->softDeleted = cp->softDeleted;
+ obj->unlinked = cp->unlinked;
+ obj->fake = cp->fake;
+ obj->renameAllowed = cp->renameAllowed;
+ obj->unlinkAllowed = cp->unlinkAllowed;
+ obj->serial = cp->serial;
+ obj->nDataChunks = cp->nDataChunks;
+
+ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+ obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
+ else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
+ obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
+
+ if (obj->hdrChunk > 0)
+ obj->lazyLoaded = 1;
+ return 1;
+}
- if (newChunkId >= 0) {
- in->chunkId = newChunkId;
- if (prevChunkId >= 0) {
- yaffs_DeleteChunk(dev, prevChunkId, 1,
- __LINE__);
- }
+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 = yaffs_CalcTnodeSize(dev);
- in->dirty = 0;
+ if (tn) {
+ if (level > 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;
+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
+ if (tn->internal[i]) {
+ ok = yaffs_CheckpointTnodeWorker(in,
+ tn->internal[i],
+ level - 1,
+ (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
+ }
}
-
+ } else if (level == 0) {
+ __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
+ ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
+ if (ok)
+ ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
}
-
- retVal = newChunkId;
-
}
- if (buffer)
- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+ return ok;
- 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_WriteCheckpointTnodes(yaffs_Object *obj)
+{
+ __u32 endMarker = ~0;
+ int ok = 1;
+
+ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
+ ok = yaffs_CheckpointTnodeWorker(obj,
+ obj->variant.fileVariant.top,
+ obj->variant.fileVariant.topLevel,
+ 0);
+ if (ok)
+ ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
+ sizeof(endMarker));
+ }
-static void yaffs_FlushFilesChunkCache(yaffs_Object * obj)
+ return ok ? 1 : 0;
+}
+
+static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
{
+ __u32 baseChunk;
+ int ok = 1;
yaffs_Device *dev = obj->myDev;
- int lowest = -99; /* Stop compiler whining. */
- int i;
- yaffs_ChunkCache *cache;
- int chunkWritten = 0;
- int nCaches = obj->myDev->nShortOpCaches;
+ yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
+ yaffs_Tnode *tn;
+ int nread = 0;
+ int tnodeSize = yaffs_CalcTnodeSize(dev);
- if (nCaches > 0) {
- do {
- cache = NULL;
+ ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
- /* 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;
- }
- }
- }
+ while (ok && (~baseChunk)) {
+ nread++;
+ /* Read level 0 tnode */
- 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;
- }
+ tn = yaffs_GetTnodeRaw(dev);
+ if (tn)
+ ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
+ else
+ ok = 0;
- } while (cache && chunkWritten > 0);
+ if (tn && ok)
+ ok = yaffs_AddOrFindLevel0Tnode(dev,
+ fileStructPtr,
+ baseChunk,
+ tn) ? 1 : 0;
- if (cache) {
- /* Hoosterman, disk full while writing cache out. */
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
+ 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;
}
-/* 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)
+
+static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
{
+ yaffs_Object *obj;
+ yaffs_CheckpointObject cp;
int i;
- int usage;
- int theOne;
+ int ok = 1;
+ struct ylist_head *lh;
- if (dev->nShortOpCaches > 0) {
- for (i = 0; i < dev->nShortOpCaches; i++) {
- if (!dev->srCache[i].object)
- return &dev->srCache[i];
- }
- return NULL;
+ /* 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);
- theOne = -1;
- usage = 0; /* just to stop the compiler grizzling */
+ T(YAFFS_TRACE_CHECKPOINT, (
+ TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %p" TENDSTR),
+ cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, obj));
- 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;
+ 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);
- return theOne >= 0 ? &dev->srCache[theOne] : NULL;
- } else {
- return NULL;
+ if (ok)
+ ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+
+ return ok ? 1 : 0;
+}
+
+static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
+{
+ yaffs_Object *obj;
+ yaffs_CheckpointObject cp;
+ int ok = 1;
+ int done = 0;
+ yaffs_Object *hardList = NULL;
+
+ while (ok && !done) {
+ ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+ if (cp.structType != sizeof(cp)) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
+ cp.structType, (int)sizeof(cp), ok));
+ ok = 0;
+ }
+
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
+ cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
+
+ if (ok && cp.objectId == ~0)
+ done = 1;
+ else if (ok) {
+ obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
+ if (obj) {
+ ok = yaffs_CheckpointObjectToObject(obj, &cp);
+ if (!ok)
+ break;
+ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
+ ok = yaffs_ReadCheckpointTnodes(obj);
+ } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
+ obj->hardLinks.next =
+ (struct ylist_head *) hardList;
+ hardList = obj;
+ }
+ } else
+ ok = 0;
+ }
}
+ if (ok)
+ yaffs_HardlinkFixup(dev, hardList);
+
+ return ok ? 1 : 0;
}
-static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device * dev)
+static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
{
- yaffs_ChunkCache *cache;
- yaffs_Object *theObj;
- int usage;
- int i;
- int pushout;
+ __u32 checkpointSum;
+ int ok;
- if (dev->nShortOpCaches > 0) {
- /* Try find a non-dirty one... */
+ yaffs_GetCheckpointSum(dev, &checkpointSum);
- cache = yaffs_GrabChunkCacheWorker(dev);
+ ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
- 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 (!ok)
+ return 0;
- /* With locking we can't assume we can use entry zero */
+ return 1;
+}
- theObj = NULL;
- usage = -1;
- cache = NULL;
- pushout = -1;
+static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
+{
+ __u32 checkpointSum0;
+ __u32 checkpointSum1;
+ int ok;
- for (i = 0; i < dev->nShortOpCaches; i++) {
- if (dev->srCache[i].object &&
- !dev->srCache[i].locked &&
- (dev->srCache[i].lastUse < usage || !cache))
- {
- usage = dev->srCache[i].lastUse;
- theObj = dev->srCache[i].object;
- cache = &dev->srCache[i];
- pushout = i;
- }
- }
+ yaffs_GetCheckpointSum(dev, &checkpointSum0);
- if (!cache || cache->dirty) {
- /* Flush and try again */
- yaffs_FlushFilesChunkCache(theObj);
- cache = yaffs_GrabChunkCacheWorker(dev);
- }
+ ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
- }
- return cache;
- } else
- return NULL;
+ if (!ok)
+ return 0;
+
+ if (checkpointSum0 != checkpointSum1)
+ return 0;
+ return 1;
}
-/* Find a cached chunk */
-static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object * obj,
- int chunkId)
+
+static int yaffs_WriteCheckpointData(yaffs_Device *dev)
{
- yaffs_Device *dev = obj->myDev;
- int i;
- if (dev->nShortOpCaches > 0) {
- for (i = 0; i < dev->nShortOpCaches; i++) {
- if (dev->srCache[i].object == obj &&
- dev->srCache[i].chunkId == chunkId) {
- dev->cacheHits++;
+ int ok = 1;
- return &dev->srCache[i];
- }
- }
+ if (dev->param.skipCheckpointWrite || !dev->param.isYaffs2) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
+ ok = 0;
}
- return NULL;
+
+ if (ok)
+ ok = yaffs_CheckpointOpen(dev, 1);
+
+ if (ok) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
+ ok = yaffs_WriteCheckpointValidityMarker(dev, 1);
+ }
+ if (ok) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
+ ok = yaffs_WriteCheckpointDevice(dev);
+ }
+ if (ok) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
+ ok = yaffs_WriteCheckpointObjects(dev);
+ }
+ if (ok) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
+ ok = yaffs_WriteCheckpointValidityMarker(dev, 0);
+ }
+
+ if (ok)
+ ok = yaffs_WriteCheckpointSum(dev);
+
+ if (!yaffs_CheckpointClose(dev))
+ ok = 0;
+
+ if (ok)
+ dev->isCheckpointed = 1;
+ else
+ dev->isCheckpointed = 0;
+
+ return dev->isCheckpointed;
}
-/* Mark the chunk for the least recently used algorithym */
-static void yaffs_UseChunkCache(yaffs_Device * dev, yaffs_ChunkCache * cache,
- int isAWrite)
+static int yaffs_ReadCheckpointData(yaffs_Device *dev)
{
+ int ok = 1;
- if (dev->nShortOpCaches > 0) {
- if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
- /* Reset the cache usages */
- int i;
- for (i = 1; i < dev->nShortOpCaches; i++) {
- dev->srCache[i].lastUse = 0;
- }
- dev->srLastUse = 0;
- }
+ if (dev->param.skipCheckpointRead || !dev->param.isYaffs2) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
+ ok = 0;
+ }
- dev->srLastUse++;
+ if (ok)
+ ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
- cache->lastUse = dev->srLastUse;
+ 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 (isAWrite) {
- cache->dirty = 1;
- }
+ if (ok) {
+ ok = yaffs_ReadCheckpointSum(dev);
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
}
+
+ if (!yaffs_CheckpointClose(dev))
+ ok = 0;
+
+ if (ok)
+ dev->isCheckpointed = 1;
+ else
+ dev->isCheckpointed = 0;
+
+ return ok ? 1 : 0;
+
}
-/* 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)
+static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
{
- if (object->myDev->nShortOpCaches > 0) {
- yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
+ if (dev->isCheckpointed ||
+ dev->blocksInCheckpoint > 0) {
+ dev->isCheckpointed = 0;
+ yaffs_CheckpointInvalidateStream(dev);
+ }
+ if (dev->param.markSuperBlockDirty)
+ dev->param.markSuperBlockDirty(dev);
+}
- if (cache) {
- cache->object = NULL;
- }
+
+int yaffs_CheckpointSave(yaffs_Device *dev)
+{
+
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+
+ yaffs_VerifyObjects(dev);
+ yaffs_VerifyBlocks(dev);
+ yaffs_VerifyFreeChunks(dev);
+
+ if (!dev->isCheckpointed) {
+ yaffs_InvalidateCheckpoint(dev);
+ yaffs_WriteCheckpointData(dev);
}
+
+ T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+
+ return dev->isCheckpointed;
}
-/* 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 yaffs_CheckpointRestore(yaffs_Device *dev)
{
- int i;
- yaffs_Device *dev = in->myDev;
+ int retval;
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
- if (dev->nShortOpCaches > 0) {
- /* Invalidate it. */
- for (i = 0; i < dev->nShortOpCaches; i++) {
- if (dev->srCache[i].object == in) {
- dev->srCache[i].object = NULL;
- }
- }
+ retval = yaffs_ReadCheckpointData(dev);
+
+ if (dev->isCheckpointed) {
+ yaffs_VerifyObjects(dev);
+ yaffs_VerifyBlocks(dev);
+ yaffs_VerifyFreeChunks(dev);
}
+
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+
+ return retval;
}
/*--------------------- File read/write ------------------------
* Curve-balls: the first chunk might also be the last chunk.
*/
-int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, __u32 offset,
- int nBytes)
+int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
+ int nBytes)
{
int chunk;
- int start;
+ __u32 start;
int nToCopy;
int n = nBytes;
int nDone = 0;
dev = in->myDev;
while (n > 0) {
- chunk = offset / dev->nBytesPerChunk + 1; /* The first chunk is 1 */
- start = offset % dev->nBytesPerChunk;
+ /* 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.
+ * the same chunk.
*/
- if ((start + n) < dev->nBytesPerChunk) {
+ if ((start + n) < dev->nDataBytesPerChunk)
nToCopy = n;
- } else {
- nToCopy = dev->nBytesPerChunk - start;
- }
+ else
+ nToCopy = dev->nDataBytesPerChunk - start;
cache = yaffs_FindChunkCache(in, chunk);
/* If the chunk is already in the cache or it is less than a whole chunk
- * then use the cache (if there is caching)
+ * or we're using inband tags then use the cache (if there is caching)
* else bypass the cache.
*/
- if (cache || nToCopy != dev->nBytesPerChunk) {
- if (dev->nShortOpCaches > 0) {
+ if (cache || nToCopy != dev->nDataBytesPerChunk || dev->param.inbandTags) {
+ if (dev->param.nShortOpCaches > 0) {
/* If we can't find the data in the cache, then load it up. */
cache->locked = 1;
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_UnlockYAFFS(TRUE);
-#endif
+
memcpy(buffer, &cache->data[start], nToCopy);
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_LockYAFFS(TRUE);
-#endif
cache->locked = 0;
} else {
/* Read into the local buffer then copy..*/
yaffs_GetTempBuffer(dev, __LINE__);
yaffs_ReadChunkDataFromObject(in, chunk,
localBuffer);
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_UnlockYAFFS(TRUE);
-#endif
+
memcpy(buffer, &localBuffer[start], nToCopy);
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_LockYAFFS(TRUE);
-#endif
+
yaffs_ReleaseTempBuffer(dev, localBuffer,
__LINE__);
}
} else {
-#ifdef CONFIG_YAFFS_WINCE
- __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
-
- /* Under WinCE can't do direct transfer. Need to use a local buffer.
- * This is because we otherwise screw up WinCE's memory mapper
- */
- yaffs_ReadChunkDataFromObject(in, chunk, localBuffer);
-
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_UnlockYAFFS(TRUE);
-#endif
- memcpy(buffer, localBuffer, dev->nBytesPerChunk);
-
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_LockYAFFS(TRUE);
- yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
-#endif
-#else
/* A full chunk. Read directly into the supplied buffer. */
yaffs_ReadChunkDataFromObject(in, chunk, buffer);
-#endif
+
}
n -= nToCopy;
return nDone;
}
-int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, __u32 offset,
- int nBytes, int writeThrough)
+int yaffs_DoWriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
+ int nBytes, int writeThrough)
{
int chunk;
- int start;
+ __u32 start;
int nToCopy;
int n = nBytes;
int nDone = 0;
int nToWriteBack;
int startOfWrite = offset;
int chunkWritten = 0;
- int nBytesRead;
+ __u32 nBytesRead;
+ __u32 chunkStart;
yaffs_Device *dev;
dev = in->myDev;
while (n > 0 && chunkWritten >= 0) {
- chunk = offset / dev->nBytesPerChunk + 1;
- start = offset % dev->nBytesPerChunk;
+ /* 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->nBytesPerChunk) {
+ if ((start + n) < dev->nDataBytesPerChunk) {
nToCopy = n;
/* Now folks, to calculate how many bytes to write back....
* we need to write back as much as was there before.
*/
- nBytesRead =
- in->variant.fileVariant.fileSize -
- ((chunk - 1) * dev->nBytesPerChunk);
+ chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
- if (nBytesRead > dev->nBytesPerChunk) {
- nBytesRead = dev->nBytesPerChunk;
- }
+ if (chunkStart > in->variant.fileVariant.fileSize)
+ nBytesRead = 0; /* Past end of file */
+ else
+ nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
+
+ if (nBytesRead > dev->nDataBytesPerChunk)
+ nBytesRead = dev->nDataBytesPerChunk;
nToWriteBack =
(nBytesRead >
(start + n)) ? nBytesRead : (start + n);
+ if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
+ YBUG();
+
} else {
- nToCopy = dev->nBytesPerChunk - start;
- nToWriteBack = dev->nBytesPerChunk;
+ nToCopy = dev->nDataBytesPerChunk - start;
+ nToWriteBack = dev->nDataBytesPerChunk;
}
- if (nToCopy != dev->nBytesPerChunk) {
- /* An incomplete start or end chunk (or maybe both start and end chunk) */
- if (dev->nShortOpCaches > 0) {
+ if (nToCopy != dev->nDataBytesPerChunk || dev->param.inbandTags) {
+ /* An incomplete start or end chunk (or maybe both start and end chunk),
+ * or we're using inband tags, so we want to use the cache buffers.
+ */
+ if (dev->param.nShortOpCaches > 0) {
yaffs_ChunkCache *cache;
/* If we can't find the data in the cache, then load the cache */
cache = yaffs_FindChunkCache(in, chunk);
+
if (!cache
- && yaffs_CheckSpaceForAllocation(in->
- myDev)) {
- cache = yaffs_GrabChunkCache(in->myDev);
+ && yaffs_CheckSpaceForAllocation(dev, 1)) {
+ cache = yaffs_GrabChunkCache(dev);
cache->object = in;
cache->chunkId = chunk;
cache->dirty = 0;
cache->locked = 0;
yaffs_ReadChunkDataFromObject(in, chunk,
- cache->
- data);
+ cache->data);
+ } else if (cache &&
+ !cache->dirty &&
+ !yaffs_CheckSpaceForAllocation(dev, 1)) {
+ /* Drop the cache if it was a read cache item and
+ * no space check has been made for it.
+ */
+ cache = NULL;
}
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;
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,
}
} else {
-
-#ifdef CONFIG_YAFFS_WINCE
- /* Under WinCE can't do direct transfer. Need to use a local buffer.
- * This is because we otherwise screw up WinCE's memory mapper
- */
- __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_UnlockYAFFS(TRUE);
-#endif
- memcpy(localBuffer, buffer, dev->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,
+ dev->nDataBytesPerChunk,
0);
-#endif
+
/* Since we've overwritten the cached data, we better invalidate it. */
yaffs_InvalidateChunkCache(in, chunk);
}
/* Update file object */
- if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize) {
+ if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
in->variant.fileVariant.fileSize = (startOfWrite + nDone);
- }
in->dirty = 1;
- return nDone;
+ return nDone;
+}
+
+int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
+ int nBytes, int writeThrough)
+{
+ yaffs_HandleHole(in,offset);
+ return yaffs_DoWriteDataToFile(in,buffer,offset,nBytes,writeThrough);
}
+
/* ---------------------- File resizing stuff ------------------ */
-static void yaffs_PruneResizedChunks(yaffs_Object * in, int newSize)
+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->nBytesPerChunk;
+ int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
- int startDel = 1 + (newSize + dev->nBytesPerChunk - 1) /
- dev->nBytesPerChunk;
+ int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
+ dev->nDataBytesPerChunk;
int i;
int chunkId;
chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
if (chunkId > 0) {
if (chunkId <
- (dev->internalStartBlock * dev->nChunksPerBlock)
+ (dev->internalStartBlock * dev->param.nChunksPerBlock)
|| chunkId >=
((dev->internalEndBlock +
- 1) * dev->nChunksPerBlock)) {
+ 1) * dev->param.nChunksPerBlock)) {
T(YAFFS_TRACE_ALWAYS,
(TSTR("Found daft chunkId %d for %d" TENDSTR),
chunkId, i));
}
-int yaffs_ResizeFile(yaffs_Object * in, int newSize)
+
+static void yaffs_ResizeDown( yaffs_Object *obj, loff_t newSize)
{
+ int newFullChunks;
+ __u32 newSizeOfPartialChunk;
+ yaffs_Device *dev = obj->myDev;
- int oldFileSize = in->variant.fileVariant.fileSize;
- int sizeOfPartialChunk;
- yaffs_Device *dev = in->myDev;
+ yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
- sizeOfPartialChunk = newSize % dev->nBytesPerChunk;
+ yaffs_PruneResizedChunks(obj, newSize);
- yaffs_FlushFilesChunkCache(in);
- yaffs_InvalidateWholeChunkCache(in);
+ if (newSizeOfPartialChunk != 0) {
+ int lastChunk = 1 + newFullChunks;
+ __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
- yaffs_CheckGarbageCollection(dev);
+ /* Got to read and rewrite the last chunk with its new size and zero pad */
+ yaffs_ReadChunkDataFromObject(obj, lastChunk, localBuffer);
+ memset(localBuffer + newSizeOfPartialChunk, 0,
+ dev->nDataBytesPerChunk - newSizeOfPartialChunk);
- if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
- return yaffs_GetFileSize(in);
- }
+ yaffs_WriteChunkDataToObject(obj, lastChunk, localBuffer,
+ newSizeOfPartialChunk, 1);
- if (newSize == oldFileSize) {
- return oldFileSize;
+ yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
}
- if (newSize < oldFileSize) {
+ obj->variant.fileVariant.fileSize = newSize;
+
+ yaffs_PruneFileStructure(dev, &obj->variant.fileVariant);
+}
+
+
+static int yaffs_HandleHole(yaffs_Object *obj, loff_t newSize)
+{
+ /* if newsSize > oldFileSize.
+ * We're going to be writing a hole.
+ * If the hole is small then write zeros otherwise write a start of hole marker.
+ */
+
+
+ loff_t oldFileSize;
+ int increase;
+ int smallHole ;
+ int result = YAFFS_OK;
+ yaffs_Device *dev = NULL;
+
+ __u8 *localBuffer = NULL;
+
+ int smallIncreaseOk = 0;
+
+ if(!obj)
+ return YAFFS_FAIL;
- yaffs_PruneResizedChunks(in, newSize);
+ if(obj->variantType != YAFFS_OBJECT_TYPE_FILE)
+ return YAFFS_FAIL;
+
+ dev = obj->myDev;
+
+ /* Bail out if not yaffs2 mode */
+ if(!dev->param.isYaffs2)
+ return YAFFS_OK;
- if (sizeOfPartialChunk != 0) {
- int lastChunk = 1 + newSize / dev->nBytesPerChunk;
- __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
+ oldFileSize = obj->variant.fileVariant.fileSize;
- /* Got to read and rewrite the last chunk with its new size and zero pad */
- yaffs_ReadChunkDataFromObject(in, lastChunk,
- localBuffer);
+ if (newSize <= oldFileSize)
+ return YAFFS_OK;
- memset(localBuffer + sizeOfPartialChunk, 0,
- dev->nBytesPerChunk - sizeOfPartialChunk);
+ increase = newSize - oldFileSize;
- yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
- sizeOfPartialChunk, 1);
+ if(increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->nDataBytesPerChunk &&
+ yaffs_CheckSpaceForAllocation(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1))
+ smallHole = 1;
+ else
+ smallHole = 0;
- yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
+ if(smallHole)
+ localBuffer= yaffs_GetTempBuffer(dev, __LINE__);
+
+ if(localBuffer){
+ /* fill hole with zero bytes */
+ int pos = oldFileSize;
+ int thisWrite;
+ int written;
+ memset(localBuffer,0,dev->nDataBytesPerChunk);
+ smallIncreaseOk = 1;
+
+ while(increase > 0 && smallIncreaseOk){
+ thisWrite = increase;
+ if(thisWrite > dev->nDataBytesPerChunk)
+ thisWrite = dev->nDataBytesPerChunk;
+ written = yaffs_DoWriteDataToFile(obj,localBuffer,pos,thisWrite,0);
+ if(written == thisWrite){
+ pos += thisWrite;
+ increase -= thisWrite;
+ } else
+ smallIncreaseOk = 0;
}
- in->variant.fileVariant.fileSize = newSize;
+ yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
- yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
+ /* If we were out of space then reverse any chunks we've added */
+ if(!smallIncreaseOk)
+ yaffs_ResizeDown(obj, oldFileSize);
}
- /* Write a new object header.
+
+ if (!smallIncreaseOk &&
+ obj->parent &&
+ obj->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
+ obj->parent->objectId != YAFFS_OBJECTID_DELETED){
+ /* Write a hole start header with the old file size */
+ yaffs_UpdateObjectHeader(obj, NULL, 0,1,0);
+ }
+
+ return result;
+
+}
+
+int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
+{
+ yaffs_Device *dev = in->myDev;
+ int oldFileSize = in->variant.fileVariant.fileSize;
+
+ 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_HandleHole(in,newSize);
+ in->variant.fileVariant.fileSize = newSize;
+ } else {
+ /* newSize < oldFileSize */
+ yaffs_ResizeDown(in, newSize);
+ }
+
+ /* Write a new object header to reflect the resize.
* show we've shrunk the file, if need be
- * Do this only if the file is not in the deleted directories.
+ * Do this only if the file is not in the deleted directories
+ * and is not shadowed.
*/
- if (in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
- in->parent->objectId != YAFFS_OBJECTID_DELETED) {
- yaffs_UpdateObjectHeader(in, NULL, 0,
- (newSize < oldFileSize) ? 1 : 0, 0);
- }
+ if (in->parent &&
+ !in->isShadowed &&
+ in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
+ in->parent->objectId != YAFFS_OBJECTID_DELETED)
+ yaffs_UpdateObjectHeader(in, NULL, 0,0,0);
- return newSize;
+
+ return YAFFS_OK;
}
-loff_t yaffs_GetFileSize(yaffs_Object * obj)
+loff_t yaffs_GetFileSize(yaffs_Object *obj)
{
+ YCHAR *alias = NULL;
obj = yaffs_GetEquivalentObject(obj);
switch (obj->variantType) {
case YAFFS_OBJECT_TYPE_FILE:
return obj->variant.fileVariant.fileSize;
case YAFFS_OBJECT_TYPE_SYMLINK:
- return yaffs_strlen(obj->variant.symLinkVariant.alias);
+ alias = obj->variant.symLinkVariant.alias;
+ if(!alias)
+ return 0;
+ return yaffs_strnlen(alias,YAFFS_MAX_ALIAS_LENGTH);
default:
return 0;
}
-int yaffs_FlushFile(yaffs_Object * in, int updateTime)
+int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync)
{
int retVal;
if (in->dirty) {
yaffs_FlushFilesChunkCache(in);
- if (updateTime) {
+ if(dataSync) /* Only sync data */
+ retVal=YAFFS_OK;
+ else {
+ if (updateTime) {
#ifdef CONFIG_YAFFS_WINCE
- yfsd_WinFileTimeNow(in->win_mtime);
+ yfsd_WinFileTimeNow(in->win_mtime);
#else
- in->yst_mtime = Y_CURRENT_TIME;
+ in->yst_mtime = Y_CURRENT_TIME;
#endif
- }
+ }
- retVal =
- (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
- 0) ? YAFFS_OK : YAFFS_FAIL;
+ retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
+ 0) ? YAFFS_OK : YAFFS_FAIL;
+ }
} else {
retVal = YAFFS_OK;
}
}
-static int yaffs_DoGenericObjectDeletion(yaffs_Object * in)
+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)) {
+ if (in->myDev->param.isYaffs2 && (in->parent != in->myDev->deletedDir)) {
/* Move to the unlinked directory so we have a record that it was deleted. */
- yaffs_ChangeObjectName(in, in->myDev->deletedDir, NULL, 0, 0);
+ yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
}
yaffs_RemoveObjectFromDirectory(in);
- yaffs_DeleteChunk(in->myDev, in->chunkId, 1, __LINE__);
- in->chunkId = -1;
+ yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
+ in->hdrChunk = 0;
yaffs_FreeObject(in);
return YAFFS_OK;
* and the inode associated with the file.
* It does not delete the links associated with the file.
*/
-static int yaffs_UnlinkFile(yaffs_Object * in)
+static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
{
int retVal;
int immediateDeletion = 0;
- if (1) {
-#ifdef __KERNEL__
- if (!in->myInode) {
- immediateDeletion = 1;
+ if (!in->myInode)
+ immediateDeletion = 1;
- }
-#else
- if (in->inUse <= 0) {
- immediateDeletion = 1;
+ 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->param.isYaffs2)
+ yaffs_ResizeFile(in, 0);
+ yaffs_SoftDeleteFile(in);
+ } else {
+ retVal =
+ yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
+ _Y("unlinked"), 0, 0);
+ }
- }
-#endif
- if (immediateDeletion) {
- retVal =
- yaffs_ChangeObjectName(in, in->myDev->deletedDir,
- NULL, 0, 0);
- T(YAFFS_TRACE_TRACING,
- (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
- in->objectId));
- in->deleted = 1;
- in->myDev->nDeletedFiles++;
- if (0 && in->myDev->isYaffs2) {
- yaffs_ResizeFile(in, 0);
- }
- yaffs_SoftDeleteFile(in);
- } else {
- retVal =
- yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
- NULL, 0, 0);
- }
- }
return retVal;
}
-int yaffs_DeleteFile(yaffs_Object * in)
+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 */
- if (!in->unlinked) {
- retVal = yaffs_UnlinkFile(in);
- }
+ /* Use soft deletion if there is data in the file.
+ * That won't be the case if it has been resized to zero.
+ */
+ if (!in->unlinked)
+ retVal = yaffs_UnlinkFileIfNeeded(in);
+
if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
in->deleted = 1;
+ deleted = 1;
in->myDev->nDeletedFiles++;
yaffs_SoftDeleteFile(in);
}
- return in->deleted ? YAFFS_OK : YAFFS_FAIL;
+ 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);
}
}
-static int yaffs_DeleteDirectory(yaffs_Object * in)
+static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj)
{
- /* First check that the directory is empty. */
- if (list_empty(&in->variant.directoryVariant.children)) {
- return yaffs_DoGenericObjectDeletion(in);
- }
+ return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) &&
+ !(ylist_empty(&obj->variant.directoryVariant.children));
+}
- return YAFFS_FAIL;
+static int yaffs_DeleteDirectory(yaffs_Object *obj)
+{
+ /* First check that the directory is empty. */
+ if (yaffs_IsNonEmptyDirectory(obj))
+ return YAFFS_FAIL;
+ return yaffs_DoGenericObjectDeletion(obj);
}
-static int yaffs_DeleteSymLink(yaffs_Object * in)
+static int yaffs_DeleteSymLink(yaffs_Object *in)
{
- YFREE(in->variant.symLinkVariant.alias);
+ if(in->variant.symLinkVariant.alias)
+ YFREE(in->variant.symLinkVariant.alias);
+ in->variant.symLinkVariant.alias=NULL;
return yaffs_DoGenericObjectDeletion(in);
}
-static int yaffs_DeleteHardLink(yaffs_Object * in)
+static int yaffs_DeleteHardLink(yaffs_Object *in)
{
/* remove this hardlink from the list assocaited with the equivalent
* object
*/
- list_del(&in->hardLinks);
+ ylist_del_init(&in->hardLinks);
return yaffs_DoGenericObjectDeletion(in);
}
-static void yaffs_DestroyObject(yaffs_Object * obj)
+int yaffs_DeleteObject(yaffs_Object *obj)
{
+int retVal = -1;
switch (obj->variantType) {
case YAFFS_OBJECT_TYPE_FILE:
- yaffs_DeleteFile(obj);
+ retVal = yaffs_DeleteFile(obj);
break;
case YAFFS_OBJECT_TYPE_DIRECTORY:
- yaffs_DeleteDirectory(obj);
+ if(!ylist_empty(&obj->variant.directoryVariant.dirty)){
+ T(YAFFS_TRACE_BACKGROUND, (TSTR("Remove object %d from dirty directories" TENDSTR),obj->objectId));
+ ylist_del_init(&obj->variant.directoryVariant.dirty);
+ }
+ return yaffs_DeleteDirectory(obj);
break;
case YAFFS_OBJECT_TYPE_SYMLINK:
- yaffs_DeleteSymLink(obj);
+ retVal = yaffs_DeleteSymLink(obj);
break;
case YAFFS_OBJECT_TYPE_HARDLINK:
- yaffs_DeleteHardLink(obj);
+ retVal = yaffs_DeleteHardLink(obj);
break;
case YAFFS_OBJECT_TYPE_SPECIAL:
- yaffs_DoGenericObjectDeletion(obj);
+ retVal = yaffs_DoGenericObjectDeletion(obj);
break;
case YAFFS_OBJECT_TYPE_UNKNOWN:
+ retVal = 0;
break; /* should not happen. */
}
+
+ return retVal;
}
-static int yaffs_UnlinkWorker(yaffs_Object * obj)
+static int yaffs_UnlinkWorker(yaffs_Object *obj)
{
+ int immediateDeletion = 0;
+
+ if (!obj->myInode)
+ immediateDeletion = 1;
+
+ if(obj)
+ yaffs_UpdateParent(obj->parent);
+
if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
return yaffs_DeleteHardLink(obj);
- } else if (!list_empty(&obj->hardLinks)) {
+ } 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
* 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)
+ * - Move 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;
+ yaffs_Object *parent;
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);
+ hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
+ parent = hl->parent;
+
+ ylist_del_init(&hl->hardLinks);
- retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
+ yaffs_AddObjectToDirectory(obj->myDev->unlinkedDir, hl);
- if (retVal == YAFFS_OK) {
+ retVal = yaffs_ChangeObjectName(obj,parent, name, 0, 0);
+
+ if (retVal == YAFFS_OK)
retVal = yaffs_DoGenericObjectDeletion(hl);
- }
+
return retVal;
- } else {
+ } else if (immediateDeletion) {
switch (obj->variantType) {
case YAFFS_OBJECT_TYPE_FILE:
- return yaffs_UnlinkFile(obj);
+ return yaffs_DeleteFile(obj);
break;
case YAFFS_OBJECT_TYPE_DIRECTORY:
+ ylist_del_init(&obj->variant.directoryVariant.dirty);
return yaffs_DeleteDirectory(obj);
break;
case YAFFS_OBJECT_TYPE_SYMLINK:
default:
return YAFFS_FAIL;
}
- }
+ } else if(yaffs_IsNonEmptyDirectory(obj))
+ return YAFFS_FAIL;
+ else
+ return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
+ _Y("unlinked"), 0, 0);
}
-static int yaffs_UnlinkObject( yaffs_Object *obj)
+static int yaffs_UnlinkObject(yaffs_Object *obj)
{
- if (obj && obj->unlinkAllowed) {
+ if (obj && obj->unlinkAllowed)
return yaffs_UnlinkWorker(obj);
- }
return YAFFS_FAIL;
}
-int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name)
+int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
{
yaffs_Object *obj;
/*----------------------- Initialisation Scanning ---------------------- */
-static void yaffs_HandleShadowedObject(yaffs_Device * dev, int objId,
- int backwardScanning)
+static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
+ int backwardScanning)
{
yaffs_Object *obj;
/* Handle YAFFS2 case (backward scanning)
* If the shadowed object exists then ignore.
*/
- if (yaffs_FindObjectByNumber(dev, objId)) {
+ obj = yaffs_FindObjectByNumber(dev, objId);
+ if(obj)
return;
- }
}
/* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
obj =
yaffs_FindOrCreateObjectByNumber(dev, objId,
YAFFS_OBJECT_TYPE_FILE);
+ if (!obj)
+ return;
+ obj->isShadowed = 1;
yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
obj->variant.fileVariant.shrinkSize = 0;
obj->valid = 1; /* So that we don't read any other info for this file */
int block;
} yaffs_BlockIndex;
-static int yaffs_Scan(yaffs_Device * dev)
+
+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 void yaffs_StripDeletedObjects(yaffs_Device *dev)
+{
+ /*
+ * Sort out state of unlinked and deleted objects after scanning.
+ */
+ struct ylist_head *i;
+ struct ylist_head *n;
+ yaffs_Object *l;
+
+ /* Soft delete all the unlinked files */
+ ylist_for_each_safe(i, n,
+ &dev->unlinkedDir->variant.directoryVariant.children) {
+ if (i) {
+ l = ylist_entry(i, yaffs_Object, siblings);
+ yaffs_DeleteObject(l);
+ }
+ }
+
+ ylist_for_each_safe(i, n,
+ &dev->deletedDir->variant.directoryVariant.children) {
+ if (i) {
+ l = ylist_entry(i, yaffs_Object, siblings);
+ yaffs_DeleteObject(l);
+ }
+ }
+
+}
+
+/*
+ * This code iterates through all the objects making sure that they are rooted.
+ * Any unrooted objects are re-rooted in lost+found.
+ * An object needs to be in one of:
+ * - Directly under deleted, unlinked
+ * - Directly or indirectly under root.
+ *
+ * Note:
+ * This code assumes that we don't ever change the current relationships between
+ * directories:
+ * rootDir->parent == unlinkedDir->parent == deletedDir->parent == NULL
+ * lostNfound->parent == rootDir
+ *
+ * This fixes the problem where directories might have inadvertently been deleted
+ * leaving the object "hanging" without being rooted in the directory tree.
+ */
+
+static int yaffs_HasNULLParent(yaffs_Device *dev, yaffs_Object *obj)
+{
+ return (obj == dev->deletedDir ||
+ obj == dev->unlinkedDir||
+ obj == dev->rootDir);
+}
+
+static void yaffs_FixHangingObjects(yaffs_Device *dev)
+{
+ yaffs_Object *obj;
+ yaffs_Object *parent;
+ int i;
+ struct ylist_head *lh;
+ struct ylist_head *n;
+ int depthLimit;
+ int hanging;
+
+
+ /* Iterate through the objects in each hash entry,
+ * looking at each object.
+ * Make sure it is rooted.
+ */
+
+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+ ylist_for_each_safe(lh, n, &dev->objectBucket[i].list) {
+ if (lh) {
+ obj = ylist_entry(lh, yaffs_Object, hashLink);
+ parent= obj->parent;
+
+ if(yaffs_HasNULLParent(dev,obj)){
+ /* These directories are not hanging */
+ hanging = 0;
+ }
+ else if(!parent || parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ hanging = 1;
+ else if(yaffs_HasNULLParent(dev,parent))
+ hanging = 0;
+ else {
+ /*
+ * Need to follow the parent chain to see if it is hanging.
+ */
+ hanging = 0;
+ depthLimit=100;
+
+ while(parent != dev->rootDir &&
+ parent->parent &&
+ parent->parent->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+ depthLimit > 0){
+ parent = parent->parent;
+ depthLimit--;
+ }
+ if(parent != dev->rootDir)
+ hanging = 1;
+ }
+ if(hanging){
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("Hanging object %d moved to lost and found" TENDSTR),
+ obj->objectId));
+ yaffs_AddObjectToDirectory(dev->lostNFoundDir,obj);
+ }
+ }
+ }
+ }
+}
+
+
+/*
+ * Delete directory contents for cleaning up lost and found.
+ */
+static void yaffs_DeleteDirectoryContents(yaffs_Object *dir)
+{
+ yaffs_Object *obj;
+ struct ylist_head *lh;
+ struct ylist_head *n;
+
+ if(dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
+
+ ylist_for_each_safe(lh, n, &dir->variant.directoryVariant.children) {
+ if (lh) {
+ obj = ylist_entry(lh, yaffs_Object, siblings);
+ if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
+ yaffs_DeleteDirectoryContents(obj);
+
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("Deleting lost_found object %d" TENDSTR),
+ obj->objectId));
+
+ /* Need to use UnlinkObject since Delete would not handle
+ * hardlinked objects correctly.
+ */
+ yaffs_UnlinkObject(obj);
+ }
+ }
+
+}
+
+static void yaffs_EmptyLostAndFound(yaffs_Device *dev)
+{
+ yaffs_DeleteDirectoryContents(dev->lostNFoundDir);
+}
+
+static int yaffs_Scan(yaffs_Device *dev)
{
yaffs_ExtendedTags tags;
int blk;
int blockIterator;
int startIterator;
int endIterator;
- int nBlocksToScan = 0;
+ int result;
int chunk;
int c;
int deleted;
yaffs_BlockState state;
yaffs_Object *hardList = NULL;
- yaffs_Object *hl;
yaffs_BlockInfo *bi;
- int sequenceNumber;
+ __u32 sequenceNumber;
yaffs_ObjectHeader *oh;
yaffs_Object *in;
yaffs_Object *parent;
- int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
+
+ int alloc_failed = 0;
+
+ struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
+
__u8 *chunkData;
- yaffs_BlockIndex *blockIndex = NULL;
+
T(YAFFS_TRACE_SCAN,
(TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
- if (dev->isYaffs2) {
- blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
- }
-
/* Scan all the blocks to determine their state */
+ bi = dev->blockInfo;
for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
- bi = yaffs_GetBlockInfo(dev, blk);
yaffs_ClearChunkBits(dev, blk);
bi->pagesInUse = 0;
- bi->softDeletions = 0;
-
- yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
-
- bi->blockState = state;
- bi->sequenceNumber = sequenceNumber;
-
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
- state, sequenceNumber));
-
- if (state == YAFFS_BLOCK_STATE_DEAD) {
- T(YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("block %d is bad" TENDSTR), blk));
- } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block empty " TENDSTR)));
- dev->nErasedBlocks++;
- dev->nFreeChunks += dev->nChunksPerBlock;
- } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
-
- /* Determine the highest sequence number */
- if (dev->isYaffs2 &&
- sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
- sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
-
- blockIndex[nBlocksToScan].seq = sequenceNumber;
- blockIndex[nBlocksToScan].block = blk;
-
- nBlocksToScan++;
-
- if (sequenceNumber >= dev->sequenceNumber) {
- dev->sequenceNumber = sequenceNumber;
- }
- } else if (dev->isYaffs2) {
- /* TODO: Nasty sequence number! */
- T(YAFFS_TRACE_SCAN,
- (TSTR
- ("Block scanning block %d has bad sequence number %d"
- TENDSTR), blk, sequenceNumber));
-
- }
- }
- }
+ bi->softDeletions = 0;
- /* Sort the blocks
- * Dungy old bubble sort for now...
- */
- if (dev->isYaffs2) {
- yaffs_BlockIndex temp;
- int i;
- int j;
+ yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
- 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;
- }
- }
+ bi->blockState = state;
+ bi->sequenceNumber = sequenceNumber;
+
+ if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
+ bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
- /* Now scan the blocks looking at the data. */
- if (dev->isYaffs2) {
- startIterator = 0;
- endIterator = nBlocksToScan - 1;
T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
- } else {
- startIterator = dev->internalStartBlock;
- endIterator = dev->internalEndBlock;
+ (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
+ state, sequenceNumber));
+
+ if (state == YAFFS_BLOCK_STATE_DEAD) {
+ T(YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("block %d is bad" TENDSTR), blk));
+ } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
+ T(YAFFS_TRACE_SCAN_DEBUG,
+ (TSTR("Block empty " TENDSTR)));
+ dev->nErasedBlocks++;
+ dev->nFreeChunks += dev->param.nChunksPerBlock;
+ }
+ bi++;
}
+ startIterator = dev->internalStartBlock;
+ endIterator = dev->internalEndBlock;
+
/* For each block.... */
- for (blockIterator = startIterator; blockIterator <= endIterator;
+ for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
blockIterator++) {
- if (dev->isYaffs2) {
- /* get the block to scan in the correct order */
- blk = blockIndex[blockIterator].block;
- } else {
- blk = blockIterator;
- }
+ 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; c < dev->nChunksPerBlock &&
+ for (c = 0; !alloc_failed && c < dev->param.nChunksPerBlock &&
state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
/* Read the tags and decide what to do */
- chunk = blk * dev->nChunksPerBlock + c;
+ chunk = blk * dev->param.nChunksPerBlock + c;
- yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
&tags);
/* Let's have a good look at this chunk... */
- if (!dev->isYaffs2 && tags.chunkDeleted) {
+ if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
/* YAFFS1 only...
* A deleted chunk
*/
/*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 means that either the block is empty or
* this is the one being allocated from
*/
state = YAFFS_BLOCK_STATE_ALLOCATING;
dev->allocationBlock = blk;
dev->allocationPage = c;
- dev->allocationBlockFinder = blk;
- /* Set it to here to encourage the allocator to go forth from here. */
-
- /* Yaffs2 sanity check:
- * This should be the one with the highest sequence number
- */
- if (dev->isYaffs2
- && (dev->sequenceNumber !=
- bi->sequenceNumber)) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("yaffs: Allocation block %d was not highest sequence id:"
- " block seq = %d, dev seq = %d"
- TENDSTR), blk,bi->sequenceNumber,dev->sequenceNumber));
- }
+ dev->allocationBlockFinder = blk;
+ /* Set block finder here to encourage the allocator to go forth from here. */
+
}
- dev->nFreeChunks += (dev->nChunksPerBlock - c);
+ dev->nFreeChunks += (dev->param.nChunksPerBlock - c);
} else if (tags.chunkId > 0) {
/* chunkId > 0 so it is a data chunk... */
unsigned int endpos;
/* PutChunkIntoFile checks for a clash (two data chunks with
* the same chunkId).
*/
- yaffs_PutChunkIntoFile(in, tags.chunkId, chunk,
- 1);
+
+ if (!in)
+ alloc_failed = 1;
+
+ if (in) {
+ if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
+ alloc_failed = 1;
+ }
+
endpos =
- (tags.chunkId - 1) * dev->nBytesPerChunk +
+ (tags.chunkId - 1) * dev->nDataBytesPerChunk +
tags.byteCount;
- if (in->variantType == YAFFS_OBJECT_TYPE_FILE
+ if (in &&
+ in->variantType == YAFFS_OBJECT_TYPE_FILE
&& in->variant.fileVariant.scannedFileSize <
endpos) {
in->variant.fileVariant.
scannedFileSize = endpos;
- if (!dev->useHeaderFileSize) {
+ if (!dev->param.useHeaderFileSize) {
in->variant.fileVariant.
fileSize =
in->variant.fileVariant.
yaffs_SetChunkBit(dev, blk, c);
bi->pagesInUse++;
- yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
chunkData,
NULL);
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
+ * 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);
+ yaffs_DeleteObject(in);
in = 0;
}
objectId,
oh->type);
- if (oh->shadowsObject > 0) {
- yaffs_HandleShadowedObject(dev,
- oh->
- shadowsObject,
- 0);
+ 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->valid) {
+ if (in && in->valid) {
/* We have already filled this one. We have a duplicate and need to resolve it. */
unsigned existingSerial = in->serial;
unsigned newSerial = tags.serialNumber;
- if (dev->isYaffs2 ||
- ((existingSerial + 1) & 3) ==
- newSerial) {
+ if (((existingSerial + 1) & 3) == newSerial) {
/* Use new one - destroy the exisiting one */
yaffs_DeleteChunk(dev,
- in->chunkId,
+ in->hdrChunk,
1, __LINE__);
in->valid = 0;
} else {
}
}
- if (!in->valid &&
+ 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->yst_ctime = oh->yst_ctime;
in->yst_rdev = oh->yst_rdev;
#endif
- in->chunkId = chunk;
+ in->hdrChunk = chunk;
+ in->serial = tags.serialNumber;
- } else if (!in->valid) {
+ } else if (in && !in->valid) {
/* we need to load this info */
in->valid = 1;
in->yst_ctime = oh->yst_ctime;
in->yst_rdev = oh->yst_rdev;
#endif
- in->chunkId = chunk;
+ in->hdrChunk = chunk;
+ in->serial = tags.serialNumber;
yaffs_SetObjectName(in, oh->name);
in->dirty = 0;
yaffs_FindOrCreateObjectByNumber
(dev, oh->parentObjectId,
YAFFS_OBJECT_TYPE_DIRECTORY);
- if (parent->variantType ==
+ if (!parent)
+ alloc_failed = 1;
+ if (parent && 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)
- {
+ YAFFS_OBJECT_TYPE_DIRECTORY;
+ YINIT_LIST_HEAD(&parent->variant.
+ directoryVariant.
+ children);
+ } else if (!parent || parent->variantType !=
+ YAFFS_OBJECT_TYPE_DIRECTORY) {
/* Hoosterman, another problem....
* We're trying to use a non-directory as a directory
*/
T(YAFFS_TRACE_ERROR,
(TSTR
- ("yaffs tragedy: attempting to use non-directory as"
- " a directory in scan. Put in lost+found."
+ ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
TENDSTR)));
parent = dev->lostNFoundDir;
}
* 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.
+ * list and fix up all the chains.
*/
switch (in->variantType) {
- case YAFFS_OBJECT_TYPE_UNKNOWN:
+ 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)
+ if (dev->param.useHeaderFileSize)
in->variant.fileVariant.
fileSize =
break;
case YAFFS_OBJECT_TYPE_HARDLINK:
in->variant.hardLinkVariant.
- equivalentObjectId =
- oh->equivalentObjectId;
+ equivalentObjectId =
+ oh->equivalentObjectId;
in->hardLinks.next =
- (struct list_head *)
- hardList;
+ (struct ylist_head *)
+ hardList;
hardList = in;
break;
case YAFFS_OBJECT_TYPE_DIRECTORY:
case YAFFS_OBJECT_TYPE_SPECIAL:
/* Do nothing */
break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- in->variant.symLinkVariant.
- alias =
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ in->variant.symLinkVariant.alias =
yaffs_CloneString(oh->alias);
+ if (!in->variant.symLinkVariant.alias)
+ alloc_failed = 1;
break;
}
- if (parent == dev->deletedDir) {
- yaffs_DestroyObject(in);
- bi->hasShrinkHeader = 1;
- }
}
}
}
state = YAFFS_BLOCK_STATE_FULL;
}
+ if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
+ /* If the block was partially allocated then treat it as fully allocated.*/
+ state = YAFFS_BLOCK_STATE_FULL;
+ dev->allocationBlock = -1;
+ }
+
bi->blockState = state;
/* Now let's see if it was dirty */
}
- if (blockIndex) {
- YFREE(blockIndex);
- }
-
+
/* Ok, we've done all the scanning.
* Fix up the hard link chains.
- * We should now have scanned all the objects, now it's time to add these
+ * 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);
+ yaffs_HardlinkFixup(dev, hardList);
- if (in) {
- /* Add the hardlink pointers */
- hl->variant.hardLinkVariant.equivalentObject = in;
- list_add(&hl->hardLinks, &in->hardLinks);
- } else {
- /* Todo Need to report/handle this better.
- * Got a problem... hardlink to a non-existant object
+ /* Fix up any shadowed objects */
+ {
+ struct yaffs_ShadowFixerStruct *fixer;
+ yaffs_Object *obj;
+
+ while (shadowFixerList) {
+ fixer = shadowFixerList;
+ shadowFixerList = fixer->next;
+ /* Complete the rename transaction by deleting the shadowed object
+ * then setting the object header to unshadowed.
*/
- hl->variant.hardLinkVariant.equivalentObject = NULL;
- INIT_LIST_HEAD(&hl->hardLinks);
+ obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
+ if (obj)
+ yaffs_DeleteObject(obj);
- }
+ obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
- }
+ if (obj)
+ yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
- /* Handle the unlinked files. Since they were left in an unlinked state we should
- * just delete them.
- */
- {
- struct list_head *i;
- struct list_head *n;
-
- yaffs_Object *l;
- /* Soft delete all the unlinked files */
- list_for_each_safe(i, n,
- &dev->unlinkedDir->variant.directoryVariant.
- children) {
- if (i) {
- l = list_entry(i, yaffs_Object, siblings);
- yaffs_DestroyObject(l);
- }
+ YFREE(fixer);
}
}
yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+ if (alloc_failed)
+ return YAFFS_FAIL;
+
T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
+
return YAFFS_OK;
}
-static int yaffs_ScanBackwards(yaffs_Device * dev)
+static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
+{
+ __u8 *chunkData;
+ yaffs_ObjectHeader *oh;
+ yaffs_Device *dev;
+ yaffs_ExtendedTags tags;
+ int result;
+ int alloc_failed = 0;
+
+ if (!in)
+ return;
+
+ dev = in->myDev;
+
+#if 0
+ T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
+ in->objectId,
+ in->lazyLoaded ? "not yet" : "already"));
+#endif
+
+ 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;
+
+ in->yst_mode = oh->yst_mode;
+#ifdef CONFIG_YAFFS_WINCE
+ in->win_atime[0] = oh->win_atime[0];
+ in->win_ctime[0] = oh->win_ctime[0];
+ in->win_mtime[0] = oh->win_mtime[0];
+ in->win_atime[1] = oh->win_atime[1];
+ in->win_ctime[1] = oh->win_ctime[1];
+ in->win_mtime[1] = oh->win_mtime[1];
+#else
+ in->yst_uid = oh->yst_uid;
+ in->yst_gid = oh->yst_gid;
+ in->yst_atime = oh->yst_atime;
+ in->yst_mtime = oh->yst_mtime;
+ in->yst_ctime = oh->yst_ctime;
+ in->yst_rdev = oh->yst_rdev;
+
+#endif
+ yaffs_SetObjectName(in, oh->name);
+
+ if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
+ in->variant.symLinkVariant.alias =
+ yaffs_CloneString(oh->alias);
+ if (!in->variant.symLinkVariant.alias)
+ alloc_failed = 1; /* Not returned to caller */
+ }
+
+ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+ }
+}
+
+static int yaffs_ScanBackwards(yaffs_Device *dev)
{
yaffs_ExtendedTags tags;
int blk;
int 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->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) {
+ if (!dev->param.isYaffs2) {
T(YAFFS_TRACE_SCAN,
(TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
return YAFFS_FAIL;
("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
+ if (!blockIndex) {
+ blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
+ altBlockIndex = 1;
+ }
+
+ if (!blockIndex) {
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
+ return YAFFS_FAIL;
+ }
+
+ dev->blocksInCheckpoint = 0;
+
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+
/* Scan all the blocks to determine their state */
+ bi = dev->blockInfo;
for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
- bi = yaffs_GetBlockInfo(dev, blk);
yaffs_ClearChunkBits(dev, blk);
bi->pagesInUse = 0;
bi->softDeletions = 0;
bi->blockState = state;
bi->sequenceNumber = sequenceNumber;
+ if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
+ bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
+ if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
+ bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
+
T(YAFFS_TRACE_SCAN_DEBUG,
(TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
state, sequenceNumber));
- if (state == YAFFS_BLOCK_STATE_DEAD) {
+
+ 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;
+ dev->nFreeChunks += dev->param.nChunksPerBlock;
} else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
/* Determine the highest sequence number */
- if (dev->isYaffs2 &&
- sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
+ if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
blockIndex[nBlocksToScan].seq = sequenceNumber;
nBlocksToScan++;
- if (sequenceNumber >= dev->sequenceNumber) {
+ if (sequenceNumber >= dev->sequenceNumber)
dev->sequenceNumber = sequenceNumber;
- }
- } else if (dev->isYaffs2) {
+ } else {
/* TODO: Nasty sequence number! */
T(YAFFS_TRACE_SCAN,
(TSTR
}
}
+ bi++;
}
- /*
- * Sort the blocks
- * Dungy old bubble sort for now...
- */
+ 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;
blockIndex[i] = temp;
}
}
+#endif
+
+ YYIELD();
+
+ T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
/* Now scan the blocks looking at the data. */
startIterator = 0;
(TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
/* For each block.... backwards */
- for (blockIterator = endIterator; blockIterator >= startIterator;
- blockIterator--) {
+ for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
+ blockIterator--) {
+ /* Cooperative multitasking! This loop can run for so
+ long that watchdog timers expire. */
+ YYIELD();
/* get the block to scan in the correct order */
blk = blockIndex[blockIterator].block;
bi = yaffs_GetBlockInfo(dev, blk);
+
+
state = bi->blockState;
deleted = 0;
/* For each chunk in each block that needs scanning.... */
- for (c = dev->nChunksPerBlock - 1; c >= 0 &&
+ foundChunksInBlock = 0;
+ for (c = dev->param.nChunksPerBlock - 1;
+ !alloc_failed && c >= 0 &&
(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
- /* Scan backwards...
+ /* Scan backwards...
* Read the tags and decide what to do
*/
- chunk = blk * dev->nChunksPerBlock + c;
- yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
+ chunk = blk * dev->param.nChunksPerBlock + c;
+
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
&tags);
/* Let's have a good look at this chunk... */
if (!tags.chunkUsed) {
- // An unassigned chunk in the block
- // This means that either the block is empty or
- // this is the one being allocated from
+ /* 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 (c == 0) {
+ if (foundChunksInBlock) {
+ /* This is a chunk that was skipped due to failing the erased check */
+ } else if (c == 0) {
/* We're looking at the first chunk in the block so the block is unused */
state = YAFFS_BLOCK_STATE_EMPTY;
dev->nErasedBlocks++;
} else {
- /* this is the block being allocated from */
- if (state ==
- YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- 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));
+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+ state == YAFFS_BLOCK_STATE_ALLOCATING) {
+ if (dev->sequenceNumber == bi->sequenceNumber) {
+ /* this is the block being allocated from */
+
+ T(YAFFS_TRACE_SCAN,
+ (TSTR
+ (" Allocating from %d %d"
+ TENDSTR), blk, c));
+
+ state = YAFFS_BLOCK_STATE_ALLOCATING;
+ dev->allocationBlock = blk;
+ dev->allocationPage = c;
+ dev->allocationBlockFinder = blk;
+ } else {
+ /* This is a partially written block that is not
+ * the current allocation block.
+ */
+
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("Partially written block %d detected" TENDSTR),
+ blk));
+ }
}
}
dev->nFreeChunks++;
+
+ } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
+ T(YAFFS_TRACE_SCAN,
+ (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
+ blk, c));
+
+ dev->nFreeChunks++;
+
} else if (tags.chunkId > 0) {
/* chunkId > 0 so it is a data chunk... */
unsigned int endpos;
-
__u32 chunkBase =
- (tags.chunkId - 1) * dev->nBytesPerChunk;
+ (tags.chunkId - 1) * dev->nDataBytesPerChunk;
+
+ foundChunksInBlock = 1;
+
yaffs_SetChunkBit(dev, blk, c);
bi->pagesInUse++;
tags.
objectId,
YAFFS_OBJECT_TYPE_FILE);
- if (in->variantType == YAFFS_OBJECT_TYPE_FILE
- && chunkBase <
- in->variant.fileVariant.shrinkSize) {
+ 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 */
- yaffs_PutChunkIntoFile(in, tags.chunkId,
- chunk, -1);
+ 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
+ /* 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->nBytesPerChunk +
- tags.byteCount;
-
+ endpos = chunkBase + tags.byteCount;
+
if (!in->valid && /* have not got an object header yet */
- in->variant.fileVariant.
- scannedFileSize < endpos) {
- in->variant.fileVariant.
- scannedFileSize = endpos;
- in->variant.fileVariant.
- fileSize =
- in->variant.fileVariant.
- scannedFileSize;
+ in->variant.fileVariant.scannedFileSize < endpos) {
+ in->variant.fileVariant.scannedFileSize = endpos;
+ in->variant.fileVariant.fileSize = endpos;
}
- } else {
- /* This chunk has been invalidated by a resize, so delete */
+ } else if (in) {
+ /* This chunk has been invalidated by a resize, or a past file deletion
+ * so delete the chunk*/
yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
}
/* 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++;
in = NULL;
if (tags.extraHeaderInfoAvailable) {
- in = yaffs_FindOrCreateObjectByNumber
- (dev, tags.objectId,
- tags.extraObjectType);
+ in = yaffs_FindOrCreateObjectByNumber(dev,
+ tags.objectId,
+ tags.extraObjectType);
+ if (!in)
+ alloc_failed = 1;
}
- if (!in || !in->valid) {
+ if (!in ||
+ (!in->valid && dev->param.disableLazyLoad) ||
+ tags.extraShadows ||
+ (!in->valid &&
+ (tags.objectId == YAFFS_OBJECTID_ROOT ||
+ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
/* If we don't have valid info then we need to read the chunk
- * TODO In future we can probably defer reading the chunk and
+ * TODO In future we can probably defer reading the chunk and
* living with invalid data until needed.
*/
- yaffs_ReadChunkWithTagsFromNAND(dev,
+ result = yaffs_ReadChunkWithTagsFromNAND(dev,
chunk,
chunkData,
NULL);
oh = (yaffs_ObjectHeader *) chunkData;
- if (!in)
+ if (dev->param.inbandTags) {
+ /* Fix up the header if they got corrupted by inband tags */
+ oh->shadowsObject = oh->inbandShadowsObject;
+ oh->isShrink = oh->inbandIsShrink;
+ }
+
+ if (!in) {
in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
+ if (!in)
+ alloc_failed = 1;
+ }
}
/* 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"
+ ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
TENDSTR), tags.objectId, chunk));
-
+ continue;
}
if (in->valid) {
/* We have already filled this one.
- * We have a duplicate that will be discarded, but
+ * We 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))
- ) {
+ 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;
(oh) ? oh->
parentObjectId : tags.
extraParentObjectId;
- unsigned isShrink =
+
+
+ isShrink =
(oh) ? oh->isShrink : tags.
extraIsShrinkHeader;
isShrink = 1;
}
- if (isShrink &&
- in->variant.fileVariant.
- shrinkSize > thisSize) {
- in->variant.fileVariant.
- shrinkSize =
- thisSize;
- }
+ if (isShrink && in->variant.fileVariant.shrinkSize > thisSize)
+ in->variant.fileVariant.shrinkSize = thisSize;
- if (isShrink) {
+ if (isShrink)
bi->hasShrinkHeader = 1;
- }
}
/* Use existing - destroy this one. */
}
+ if (!in->valid && in->variantType !=
+ (oh ? oh->type : tags.extraObjectType))
+ T(YAFFS_TRACE_ERROR, (
+ TSTR("yaffs tragedy: Bad object type, "
+ TCONT("%d != %d, for object %d at chunk ")
+ TCONT("%d during scan")
+ TENDSTR), oh ?
+ oh->type : tags.extraObjectType,
+ in->variantType, tags.objectId,
+ chunk));
+
if (!in->valid &&
(tags.objectId == YAFFS_OBJECTID_ROOT ||
tags.objectId ==
YAFFS_OBJECTID_LOSTNFOUND)) {
/* We only load some info, don't fiddle with directory structure */
in->valid = 1;
- in->variantType = oh->type;
- in->yst_mode = oh->yst_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->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
+ in->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 */
in->valid = 1;
- in->variantType = oh->type;
+ in->hdrChunk = chunk;
- in->yst_mode = oh->yst_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->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
+ in->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;
- if (oh->shadowsObject > 0) {
- yaffs_HandleShadowedObject(dev,
+ if (oh->shadowsObject > 0)
+ yaffs_HandleShadowedObject(dev,
oh->
shadowsObject,
1);
- }
+
- yaffs_SetObjectName(in, oh->name);
+
+ yaffs_SetObjectName(in, oh->name);
+ parent =
+ yaffs_FindOrCreateObjectByNumber
+ (dev, oh->parentObjectId,
+ YAFFS_OBJECT_TYPE_DIRECTORY);
+
+ fileSize = oh->fileSize;
+ isShrink = oh->isShrink;
+ equivalentObjectId = oh->equivalentObjectId;
+
+ } else {
+ in->variantType = tags.extraObjectType;
+ parent =
+ yaffs_FindOrCreateObjectByNumber
+ (dev, tags.extraParentObjectId,
+ YAFFS_OBJECT_TYPE_DIRECTORY);
+ fileSize = tags.extraFileLength;
+ isShrink = tags.extraIsShrinkHeader;
+ equivalentObjectId = tags.extraEquivalentObjectId;
+ in->lazyLoaded = 1;
+
+ }
in->dirty = 0;
+ if (!parent)
+ alloc_failed = 1;
+
/* directory stuff...
* hook up to parent
*/
- parent =
- yaffs_FindOrCreateObjectByNumber
- (dev, oh->parentObjectId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
- if (parent->variantType ==
+ if (parent && 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)
- {
+ YAFFS_OBJECT_TYPE_DIRECTORY;
+ YINIT_LIST_HEAD(&parent->variant.
+ directoryVariant.
+ children);
+ } else if (!parent || parent->variantType !=
+ YAFFS_OBJECT_TYPE_DIRECTORY) {
/* Hoosterman, another problem....
* We're trying to use a non-directory as a directory
*/
T(YAFFS_TRACE_ERROR,
(TSTR
- ("yaffs tragedy: attempting to use non-directory as"
- " a directory in scan. Put in lost+found."
+ ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
TENDSTR)));
parent = dev->lostNFoundDir;
}
yaffs_AddObjectToDirectory(parent, in);
- if ((parent == dev->deletedDir ||
- parent == dev->unlinkedDir)) {
- /* If it is unlinked at start up then it wants deleting */
- in->deleted = 1;
- }
+ itsUnlinked = (parent == dev->deletedDir) ||
+ (parent == dev->unlinkedDir);
- if (oh->isShrink) {
+ if (isShrink) {
/* Mark the block as having a shrinkHeader */
bi->hasShrinkHeader = 1;
}
* 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.
+ * through this list and fix up all the chains.
*/
switch (in->variantType) {
- case YAFFS_OBJECT_TYPE_UNKNOWN:
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
/* Todo got a problem */
break;
case YAFFS_OBJECT_TYPE_FILE:
if (in->variant.fileVariant.
- scannedFileSize <
- oh->fileSize) {
+ 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
+ * This will happen if the file is resized to be larger
* than its current data extents.
*/
- in->variant.fileVariant.fileSize =
- oh->fileSize;
- in->variant.fileVariant.scannedFileSize =
- in->variant.fileVariant.fileSize;
+ in->variant.fileVariant.fileSize = fileSize;
+ in->variant.fileVariant.scannedFileSize = fileSize;
}
- if (oh->isShrink &&
- in->variant.fileVariant.shrinkSize >
- oh->fileSize) {
- in->variant.fileVariant.shrinkSize =
- oh->fileSize;
- }
+ if (in->variant.fileVariant.shrinkSize > fileSize)
+ in->variant.fileVariant.shrinkSize = fileSize;
+
break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- in->variant.hardLinkVariant.equivalentObjectId =
- oh->equivalentObjectId;
- in->hardLinks.next =
- (struct list_head *) hardList;
- hardList = in;
+ 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 */
/* Do nothing */
break;
case YAFFS_OBJECT_TYPE_SYMLINK:
- in->variant.symLinkVariant.
- alias =
- yaffs_CloneString(oh->
- alias);
+ if (oh) {
+ in->variant.symLinkVariant.alias =
+ yaffs_CloneString(oh->alias);
+ if (!in->variant.symLinkVariant.alias)
+ alloc_failed = 1;
+ }
break;
}
}
+
}
- }
+
+ } /* End of scanning for each chunk */
if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
/* If we got this far while scanning, then the block is fully allocated. */
state = YAFFS_BLOCK_STATE_FULL;
}
+
bi->blockState = state;
/* Now let's see if it was dirty */
}
}
+
+ yaffs_SkipRestOfBlock(dev);
- 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
+ * 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);
+ yaffs_HardlinkFixup(dev, hardList);
- in = yaffs_FindObjectByNumber(dev,
- hl->variant.hardLinkVariant.
- equivalentObjectId);
- if (in) {
- /* Add the hardlink pointers */
- hl->variant.hardLinkVariant.equivalentObject = in;
- list_add(&hl->hardLinks, &in->hardLinks);
- } else {
- /* Todo Need to report/handle this better.
- * Got a problem... hardlink to a non-existant object
- */
- hl->variant.hardLinkVariant.equivalentObject = NULL;
- INIT_LIST_HEAD(&hl->hardLinks);
+ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
- }
+ if (alloc_failed)
+ return YAFFS_FAIL;
+
+ T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
+
+ return YAFFS_OK;
+}
+
+/*------------------------------ Directory Functions ----------------------------- */
+
+static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
+{
+ struct ylist_head *lh;
+ yaffs_Object *listObj;
+
+ int count = 0;
+ if (!obj) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
+ YBUG();
+ return;
}
- {
- struct list_head *i;
- struct list_head *n;
-
- yaffs_Object *l;
-
- /* Soft delete all the unlinked files */
- list_for_each_safe(i, n,
- &dev->unlinkedDir->variant.directoryVariant.
- children) {
- if (i) {
- l = list_entry(i, yaffs_Object, siblings);
- yaffs_DestroyObject(l);
- }
+ if (yaffs_SkipVerification(obj->myDev))
+ return;
+
+ if (!obj->parent) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
+ YBUG();
+ return;
+ }
+
+ if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
+ YBUG();
+ }
+
+ /* Iterate through the objects in each hash entry */
+
+ ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
+ if (lh) {
+ listObj = ylist_entry(lh, yaffs_Object, siblings);
+ yaffs_VerifyObject(listObj);
+ if (obj == listObj)
+ count++;
}
+ }
+
+ if (count != 1) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
+ YBUG();
+ }
+}
+
+static void yaffs_VerifyDirectory(yaffs_Object *directory)
+{
+ struct ylist_head *lh;
+ yaffs_Object *listObj;
+
+ if (!directory) {
+ YBUG();
+ return;
+ }
- /* Soft delete all the deletedDir files */
- list_for_each_safe(i, n,
- &dev->deletedDir->variant.directoryVariant.
- children) {
- if (i) {
- l = list_entry(i, yaffs_Object, siblings);
- yaffs_DestroyObject(l);
+ if (yaffs_SkipFullVerification(directory->myDev))
+ return;
+
+ if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
+ YBUG();
+ }
+
+ /* Iterate through the objects in each hash entry */
+ ylist_for_each(lh, &directory->variant.directoryVariant.children) {
+ if (lh) {
+ listObj = ylist_entry(lh, yaffs_Object, siblings);
+ if (listObj->parent != directory) {
+ T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
+ YBUG();
}
+ yaffs_VerifyObjectInDirectory(listObj);
}
}
+}
- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+/*
+ *yaffs_UpdateParent() handles fixing a directories mtime and ctime when a new
+ * link (ie. name) is created or deleted in the directory.
+ *
+ * ie.
+ * create dir/a : update dir's mtime/ctime
+ * rm dir/a: update dir's mtime/ctime
+ * modify dir/a: don't update dir's mtimme/ctime
+ *
+ * This can be handled immediately or defered. Defering helps reduce the number
+ * of updates when many files in a directory are changed within a brief period.
+ *
+ * If the directory updating is defered then yaffs_UpdateDirtyDirecories must be
+ * called periodically.
+ */
+
+static void yaffs_UpdateParent(yaffs_Object *obj)
+{
+ yaffs_Device *dev;
+ if(!obj)
+ return;
- T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
+ dev = obj->myDev;
+ obj->dirty = 1;
+ obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME;
+ if(dev->param.deferDirectoryUpdate){
+ struct ylist_head *link = &obj->variant.directoryVariant.dirty;
+
+ if(ylist_empty(link)){
+ ylist_add(link,&dev->dirtyDirectories);
+ T(YAFFS_TRACE_BACKGROUND, (TSTR("Added object %d to dirty directories" TENDSTR),obj->objectId));
+ }
- return YAFFS_OK;
+ } else
+ yaffs_UpdateObjectHeader(obj,NULL,0,0,0);
}
-/*------------------------------ Directory Functions ----------------------------- */
+void yaffs_UpdateDirtyDirectories(yaffs_Device *dev)
+{
+ struct ylist_head *link;
+ yaffs_Object *obj;
+ yaffs_DirectoryStructure *dS;
+ yaffs_ObjectVariant *oV;
+
+ T(YAFFS_TRACE_BACKGROUND, (TSTR("Update dirty directories" TENDSTR)));
+
+ while(!ylist_empty(&dev->dirtyDirectories)){
+ link = dev->dirtyDirectories.next;
+ ylist_del_init(link);
+
+ dS=ylist_entry(link,yaffs_DirectoryStructure,dirty);
+ oV = ylist_entry(dS,yaffs_ObjectVariant,directoryVariant);
+ obj = ylist_entry(oV,yaffs_Object,variant);
+
+ T(YAFFS_TRACE_BACKGROUND, (TSTR("Update directory %d" TENDSTR), obj->objectId));
+
+ if(obj->dirty)
+ yaffs_UpdateObjectHeader(obj,NULL,0,0,0);
+ }
+}
-static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj)
+static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
{
yaffs_Device *dev = obj->myDev;
-
- if(dev && dev->removeObjectCallback)
- dev->removeObjectCallback(obj);
-
- list_del_init(&obj->siblings);
+ yaffs_Object *parent;
+
+ yaffs_VerifyObjectInDirectory(obj);
+ parent = obj->parent;
+
+ yaffs_VerifyDirectory(parent);
+
+ if (dev && dev->param.removeObjectCallback)
+ dev->param.removeObjectCallback(obj);
+
+
+ ylist_del_init(&obj->siblings);
obj->parent = NULL;
+
+ yaffs_VerifyDirectory(parent);
}
-
-static void yaffs_AddObjectToDirectory(yaffs_Object * directory,
- yaffs_Object * obj)
+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();
+ return;
}
if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
T(YAFFS_TRACE_ALWAYS,
if (obj->siblings.prev == NULL) {
/* Not initialised */
- INIT_LIST_HEAD(&obj->siblings);
-
- } else if (!list_empty(&obj->siblings)) {
- /* If it is holed up somewhere else, un hook it */
- yaffs_RemoveObjectFromDirectory(obj);
+ YBUG();
}
+
+
+ yaffs_VerifyDirectory(directory);
+
+ yaffs_RemoveObjectFromDirectory(obj);
+
+
/* Now add it */
- list_add(&obj->siblings, &directory->variant.directoryVariant.children);
+ ylist_add(&obj->siblings, &directory->variant.directoryVariant.children);
obj->parent = directory;
if (directory == obj->myDev->unlinkedDir
- || directory == obj->myDev->deletedDir) {
+ || directory == obj->myDev->deletedDir) {
obj->unlinked = 1;
obj->myDev->nUnlinkedFiles++;
obj->renameAllowed = 0;
}
+
+ 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;
+ struct ylist_head *i;
YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
yaffs_Object *l;
- if (!name) {
+ if (!name)
return NULL;
- }
if (!directory) {
T(YAFFS_TRACE_ALWAYS,
("tragedy: yaffs_FindObjectByName: null pointer directory"
TENDSTR)));
YBUG();
+ return NULL;
}
if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
T(YAFFS_TRACE_ALWAYS,
sum = yaffs_CalcNameSum(name);
- list_for_each(i, &directory->variant.directoryVariant.children) {
+ ylist_for_each(i, &directory->variant.directoryVariant.children) {
if (i) {
- l = list_entry(i, yaffs_Object, siblings);
+ 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) {
+ if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0)
return l;
- }
- } else if (yaffs_SumCompare(l->sum, sum) || l->chunkId <= 0)
- {
- /* LostnFound cunk called Objxxx
+ } 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_strcmp(name, buffer) == 0) {
+ YAFFS_MAX_NAME_LENGTH + 1);
+ if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
return l;
- }
-
}
}
}
#if 0
-int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir,
- int (*fn) (yaffs_Object *))
+int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
+ int (*fn) (yaffs_Object *))
{
- struct list_head *i;
+ struct ylist_head *i;
yaffs_Object *l;
if (!theDir) {
("tragedy: yaffs_FindObjectByName: null pointer directory"
TENDSTR)));
YBUG();
+ return YAFFS_FAIL;
}
if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
T(YAFFS_TRACE_ALWAYS,
(TSTR
("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
YBUG();
+ return YAFFS_FAIL;
}
- list_for_each(i, &theDir->variant.directoryVariant.children) {
+ ylist_for_each(i, &theDir->variant.directoryVariant.children) {
if (i) {
- l = list_entry(i, yaffs_Object, siblings);
- if (l && !fn(l)) {
+ l = ylist_entry(i, yaffs_Object, siblings);
+ if (l && !fn(l))
return YAFFS_FAIL;
- }
}
}
* 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 */
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));
+ yaffs_CheckObjectDetailsLoaded(obj);
+
if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
- } else if (obj->chunkId <= 0) {
+ } else if (obj->hdrChunk <= 0) {
YCHAR locName[20];
+ 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_sprintf(locName, _Y("%s%d"), YAFFS_LOSTNFOUND_PREFIX,
- obj->objectId);
+ 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_strncpy(name, obj->shortName,YAFFS_SHORT_NAME_LENGTH+1);
#endif
else {
+ int result;
__u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer;
- memset(buffer, 0, obj->myDev->nBytesPerChunk);
+ memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
- if (obj->chunkId >= 0) {
- yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
- obj->chunkId, buffer,
+ if (obj->hdrChunk > 0) {
+ result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
+ obj->hdrChunk, buffer,
NULL);
}
yaffs_strncpy(name, oh->name, buffSize - 1);
+ name[buffSize-1]=0;
yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
}
- return yaffs_strlen(name);
+ return yaffs_strnlen(name,buffSize-1);
}
-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) {
+ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
return obj->variant.fileVariant.fileSize;
- }
- if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
- return yaffs_strlen(obj->variant.symLinkVariant.alias);
+ if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK){
+ if(!obj->variant.symLinkVariant.alias)
+ return 0;
+ return yaffs_strnlen(obj->variant.symLinkVariant.alias,YAFFS_MAX_ALIAS_LENGTH);
} else {
/* Only a directory should drop through to here */
- return obj->myDev->nBytesPerChunk;
+ return obj->myDev->nDataBytesPerChunk;
}
}
-int yaffs_GetObjectLinkCount(yaffs_Object * obj)
+int yaffs_GetObjectLinkCount(yaffs_Object *obj)
{
int count = 0;
- struct list_head *i;
+ struct ylist_head *i;
- if (!obj->unlinked) {
- count++; /* the object itself */
- }
- list_for_each(i, &obj->hardLinks) {
- count++; /* add the hard links; */
- }
- return count;
+ 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);
}
}
-YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj)
+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;
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_valid = valid;
return YAFFS_OK;
-
}
#endif
#if 0
-int yaffs_DumpObject(yaffs_Object * obj)
+int yaffs_DumpObject(yaffs_Object *obj)
{
YCHAR name[257];
- yaffs_GetObjectName(obj, name, 256);
+ yaffs_GetObjectName(obj, name, YAFFS_MAX_NAME_LENGTH + 1);
T(YAFFS_TRACE_ALWAYS,
(TSTR
("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,
+ obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdrChunk,
yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
return YAFFS_OK;
/*---------------------------- Initialisation code -------------------------------------- */
-static int yaffs_CheckDevFunctions(const yaffs_Device * dev)
+static int yaffs_CheckDevFunctions(const yaffs_Device *dev)
{
/* Common functions, gotta have */
- if (!dev->eraseBlockInNAND || !dev->initialiseNAND)
+ if (!dev->param.eraseBlockInNAND || !dev->param.initialiseNAND)
return 0;
#ifdef CONFIG_YAFFS_YAFFS2
/* Can use the "with tags" style interface for yaffs1 or yaffs2 */
- if (dev->writeChunkWithTagsToNAND &&
- dev->readChunkWithTagsFromNAND &&
- !dev->writeChunkToNAND &&
- !dev->readChunkFromNAND &&
- dev->markNANDBlockBad && dev->queryNANDBlock)
+ if (dev->param.writeChunkWithTagsToNAND &&
+ dev->param.readChunkWithTagsFromNAND &&
+ !dev->param.writeChunkToNAND &&
+ !dev->param.readChunkFromNAND &&
+ dev->param.markNANDBlockBad &&
+ dev->param.queryNANDBlock)
return 1;
#endif
/* Can use the "spare" style interface for yaffs1 */
- if (!dev->isYaffs2 &&
- !dev->writeChunkWithTagsToNAND &&
- !dev->readChunkWithTagsFromNAND &&
- dev->writeChunkToNAND &&
- dev->readChunkFromNAND &&
- !dev->markNANDBlockBad && !dev->queryNANDBlock)
+ if (!dev->param.isYaffs2 &&
+ !dev->param.writeChunkWithTagsToNAND &&
+ !dev->param.readChunkWithTagsFromNAND &&
+ dev->param.writeChunkToNAND &&
+ dev->param.readChunkFromNAND &&
+ !dev->param.markNANDBlockBad &&
+ !dev->param.queryNANDBlock)
return 1;
- return 0; /* bad */
+ return 0; /* bad */
+}
+
+
+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 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)));
+ T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
/* Check stuff that must be set */
return YAFFS_FAIL;
}
- dev->internalStartBlock = dev->startBlock;
- dev->internalEndBlock = dev->endBlock;
+ dev->internalStartBlock = dev->param.startBlock;
+ dev->internalEndBlock = dev->param.endBlock;
dev->blockOffset = 0;
dev->chunkOffset = 0;
dev->nFreeChunks = 0;
- if (dev->startBlock == 0) {
- dev->internalStartBlock = dev->startBlock + 1;
- dev->internalEndBlock = dev->endBlock + 1;
+ dev->gcBlock = -1;
+
+ if (dev->param.startBlock == 0) {
+ dev->internalStartBlock = dev->param.startBlock + 1;
+ dev->internalEndBlock = dev->param.endBlock + 1;
dev->blockOffset = 1;
- dev->chunkOffset = dev->nChunksPerBlock;
+ dev->chunkOffset = dev->param.nChunksPerBlock;
}
/* Check geometry parameters. */
- if ((dev->isYaffs2 && dev->nBytesPerChunk < 1024) || (!dev->isYaffs2 && dev->nBytesPerChunk != 512) || dev->nChunksPerBlock < 2 || dev->nReservedBlocks < 2 || dev->internalStartBlock <= 0 || dev->internalEndBlock <= 0 || dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2) // otherwise it is too small
- ) {
+ if ((!dev->param.inbandTags && dev->param.isYaffs2 && dev->param.totalBytesPerChunk < 1024) ||
+ (!dev->param.isYaffs2 && dev->param.totalBytesPerChunk < 512) ||
+ (dev->param.inbandTags && !dev->param.isYaffs2) ||
+ dev->param.nChunksPerBlock < 2 ||
+ dev->param.nReservedBlocks < 2 ||
+ dev->internalStartBlock <= 0 ||
+ dev->internalEndBlock <= 0 ||
+ dev->internalEndBlock <= (dev->internalStartBlock + dev->param.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" : ""));
+ ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
+ TENDSTR), dev->param.totalBytesPerChunk, dev->param.isYaffs2 ? "2" : "", dev->param.inbandTags));
return YAFFS_FAIL;
}
return YAFFS_FAIL;
}
+ /* Sort out space for inband tags, if required */
+ if (dev->param.inbandTags)
+ dev->nDataBytesPerChunk = dev->param.totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
+ else
+ dev->nDataBytesPerChunk = dev->param.totalBytesPerChunk;
+
/* Got the right mix of functions? */
if (!yaffs_CheckDevFunctions(dev)) {
/* Function missing */
dev->isMounted = 1;
- nBlocks = dev->internalEndBlock - dev->internalStartBlock + 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;
- /* OK now calculate a few things for the device
+ /*
* Calculate chunkGroupBits.
* We need to find the next power of 2 > than internalEndBlock
*/
- x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
+ x = dev->param.nChunksPerBlock * (dev->internalEndBlock + 1);
- for (bits = extraBits = 0; x > 1; bits++) {
- if (x & 1)
- extraBits++;
- x >>= 1;
- }
+ bits = ShiftsGE(x);
+
+ /* Set up tnode width if wide tnodes are enabled. */
+ if (!dev->param.wideTnodesDisabled) {
+ /* bits must be even so that we end up with 32-bit words */
+ if (bits & 1)
+ bits++;
+ if (bits < 16)
+ dev->tnodeWidth = 16;
+ else
+ dev->tnodeWidth = bits;
+ } else
+ dev->tnodeWidth = 16;
- if (extraBits > 0)
- bits++;
+ dev->tnodeMask = (1<<dev->tnodeWidth)-1;
- /* Level0 Tnodes are 16 bits, so if the bitwidth of the
+ /* 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 <= 16) {
+
+ if (bits <= dev->tnodeWidth)
dev->chunkGroupBits = 0;
- } else {
- dev->chunkGroupBits = bits - 16;
- }
+ else
+ dev->chunkGroupBits = bits - dev->tnodeWidth;
+
dev->chunkGroupSize = 1 << dev->chunkGroupBits;
- if (dev->nChunksPerBlock < dev->chunkGroupSize) {
+ if (dev->param.nChunksPerBlock < dev->chunkGroupSize) {
/* We have a problem because the soft delete won't work if
* the chunk group size > chunks per block.
* This can be remedied by using larger "virtual blocks".
dev->nErasureFailures = 0;
dev->nErasedBlocks = 0;
dev->isDoingGC = 0;
+ dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
+ YINIT_LIST_HEAD(&dev->dirtyDirectories);
+ dev->oldestDirtySequence = 0;
- /* 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);
- }
- }
+ /* Initialise temporary buffers and caches. */
+ if (!yaffs_InitialiseTempBuffers(dev))
+ init_failed = 1;
- yaffs_InitialiseBlocks(dev, nBlocks);
+ dev->srCache = NULL;
+ dev->gcCleanupList = NULL;
- yaffs_InitialiseTnodes(dev);
- yaffs_InitialiseObjects(dev);
+ if (!init_failed &&
+ dev->param.nShortOpCaches > 0) {
+ int i;
+ void *buf;
+ int srCacheBytes = dev->param.nShortOpCaches * sizeof(yaffs_ChunkCache);
- dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
+ if (dev->param.nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
+ dev->param.nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
- if (dev->nShortOpCaches > 0) {
- int i;
+ dev->srCache = YMALLOC(srCacheBytes);
- if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES) {
- dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
- }
+ buf = (__u8 *) dev->srCache;
- dev->srCache =
- YMALLOC(dev->nShortOpCaches * sizeof(yaffs_ChunkCache));
+ if (dev->srCache)
+ memset(dev->srCache, 0, srCacheBytes);
- for (i = 0; i < dev->nShortOpCaches; i++) {
+ for (i = 0; i < dev->param.nShortOpCaches && buf; i++) {
dev->srCache[i].object = NULL;
dev->srCache[i].lastUse = 0;
dev->srCache[i].dirty = 0;
- dev->srCache[i].data = YMALLOC(dev->nBytesPerChunk);
+ dev->srCache[i].data = buf = YMALLOC_DMA(dev->param.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 = NULL;
- dev->unlinkedDir = dev->deletedDir = NULL;
+ if (!init_failed) {
+ dev->gcCleanupList = YMALLOC(dev->param.nChunksPerBlock * sizeof(__u32));
+ if (!dev->gcCleanupList)
+ init_failed = 1;
+ }
- dev->unlinkedDir =
- yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
- dev->deletedDir =
- yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
+ if (dev->param.isYaffs2)
+ dev->param.useHeaderFileSize = 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 (!init_failed && !yaffs_InitialiseBlocks(dev))
+ init_failed = 1;
+
+ yaffs_InitialiseTnodes(dev);
+ yaffs_InitialiseObjects(dev);
+
+ if (!init_failed && !yaffs_CreateInitialDirectories(dev))
+ init_failed = 1;
+
+
+ if (!init_failed) {
+ /* Now scan the flash. */
+ if (dev->param.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;
+
+ if (!init_failed && !yaffs_InitialiseBlocks(dev))
+ init_failed = 1;
+
+ yaffs_InitialiseTnodes(dev);
+ yaffs_InitialiseObjects(dev);
- if (dev->isYaffs2) {
- dev->useHeaderFileSize = 1;
+ 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;
+
+ yaffs_StripDeletedObjects(dev);
+ yaffs_FixHangingObjects(dev);
+ if(dev->param.emptyLostAndFound)
+ yaffs_EmptyLostAndFound(dev);
}
- /* Now scan the flash. */
- if (dev->isYaffs2)
- yaffs_ScanBackwards(dev);
- else
- yaffs_Scan(dev);
+ 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->nRetiredBlocks = 0;
yaffs_VerifyFreeChunks(dev);
+ yaffs_VerifyBlocks(dev);
- T(YAFFS_TRACE_ALWAYS,
+ /* Clean up any aborted checkpoint data */
+ if(!dev->isCheckpointed && dev->blocksInCheckpoint > 0)
+ yaffs_InvalidateCheckpoint(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) {
int i;
yaffs_DeinitialiseBlocks(dev);
yaffs_DeinitialiseTnodes(dev);
yaffs_DeinitialiseObjects(dev);
- if (dev->nShortOpCaches > 0) {
+ if (dev->param.nShortOpCaches > 0 &&
+ dev->srCache) {
- for (i = 0; i < dev->nShortOpCaches; i++) {
- YFREE(dev->srCache[i].data);
+ for (i = 0; i < dev->param.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 (dev->param.deinitialiseNAND)
+ dev->param.deinitialiseNAND(dev);
+ }
}
-static int yaffs_CountFreeChunks(yaffs_Device * dev)
+static int yaffs_CountFreeChunks(yaffs_Device *dev)
{
- int nFree;
+ int nFree=0;
int b;
yaffs_BlockInfo *blk;
- for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
- b++) {
- blk = yaffs_GetBlockInfo(dev, b);
-
+ blk = dev->blockInfo;
+ for (b = dev->internalStartBlock; b <= dev->internalEndBlock; b++) {
switch (blk->blockState) {
case YAFFS_BLOCK_STATE_EMPTY:
case YAFFS_BLOCK_STATE_ALLOCATING:
case YAFFS_BLOCK_STATE_COLLECTING:
case YAFFS_BLOCK_STATE_FULL:
nFree +=
- (dev->nChunksPerBlock - blk->pagesInUse +
+ (dev->param.nChunksPerBlock - blk->pagesInUse +
blk->softDeletions);
break;
default:
break;
}
-
+ blk++;
}
return nFree;
}
-int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev)
+int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
{
/* This is what we report to the outside world */
int nFree;
int nDirtyCacheChunks;
+ int blocksForCheckpoint;
+ int i;
#if 1
nFree = dev->nFreeChunks;
nFree = yaffs_CountFreeChunks(dev);
#endif
+ nFree += dev->nDeletedFiles;
+
/* Now count the number of dirty chunks in the cache and subtract those */
- {
- int i;
- for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
- if (dev->srCache[i].dirty)
- nDirtyCacheChunks++;
- }
+ for (nDirtyCacheChunks = 0, i = 0; i < dev->param.nShortOpCaches; i++) {
+ if (dev->srCache[i].dirty)
+ nDirtyCacheChunks++;
}
nFree -= nDirtyCacheChunks;
- nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
+ nFree -= ((dev->param.nReservedBlocks + 1) * dev->param.nChunksPerBlock);
+
+ /* Now we figure out how much to reserve for the checkpoint and report that... */
+ blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
+ if (blocksForCheckpoint < 0)
+ blocksForCheckpoint = 0;
+
+ nFree -= (blocksForCheckpoint * dev->param.nChunksPerBlock);
if (nFree < 0)
nFree = 0;
static int yaffs_freeVerificationFailures;
-static void yaffs_VerifyFreeChunks(yaffs_Device * dev)
+static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
{
- int counted = yaffs_CountFreeChunks(dev);
+ int counted;
+ int difference;
- int difference = dev->nFreeChunks - counted;
+ if (yaffs_SkipVerification(dev))
+ return;
+
+ counted = yaffs_CountFreeChunks(dev);
+
+ difference = dev->nFreeChunks - counted;
if (difference) {
T(YAFFS_TRACE_ALWAYS,
/*---------------------------------------- YAFFS test code ----------------------*/
-#define yaffs_CheckStruct(structure,syze, name) \
- if(sizeof(structure) != syze) \
- { \
- T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),\
- name,syze,sizeof(structure))); \
- return YAFFS_FAIL; \
- }
+#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, (int) 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;
+#ifndef CONFIG_YAFFS_WINCE
+ yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");
+#endif
+ return YAFFS_OK;
}