/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
* 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 1.96 2009-12-03 03:42:28 charles Exp $";
-
#include "yportenv.h"
+#include "yaffs_trace.h"
#include "yaffsinterface.h"
#include "yaffs_guts.h"
#include "yaffs_getblockinfo.h"
#include "yaffs_tagscompat.h"
-#ifndef CONFIG_YAFFS_USE_OWN_SORT
-#include "yaffs_qsort.h"
-#endif
+
#include "yaffs_nand.h"
-#include "yaffs_checkptrw.h"
+#include "yaffs_yaffs1.h"
+#include "yaffs_yaffs2.h"
+#include "yaffs_bitmap.h"
#include "yaffs_nand.h"
#include "yaffs_packedtags2.h"
+#include "yaffs_nameval.h"
+#include "yaffs_allocator.h"
-#define YAFFS_PASSIVE_GC_CHUNKS 2
+/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */
+#define YAFFS_GC_GOOD_ENOUGH 2
+#define YAFFS_GC_PASSIVE_THRESHOLD 4
#include "yaffs_ecc.h"
+
/* Robustification (if it ever comes about...) */
static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND);
static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
static int yaffs_UnlinkObject(yaffs_Object *obj);
static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
-static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
-
static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev,
const __u8 *buffer,
yaffs_ExtendedTags *tags,
int useReserve);
-static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
- int chunkInNAND, int inScan);
+
static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
yaffs_ObjectType type);
-static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
- yaffs_Object *obj);
-static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
- int force, int isShrink, int shadows);
+
+
+static int yaffs_ApplyXMod(yaffs_Device *dev, char *buffer, yaffs_XAttrMod *xmod);
+
static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
static int yaffs_CheckStructures(void);
-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
- int chunkOffset, int *limit);
static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo);
static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
yaffs_BlockInfo **blockUsedPtr);
-static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
-
static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
static void yaffs_VerifyDirectory(yaffs_Object *directory);
static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
-static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
-
static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
yaffs_ExtendedTags *tags);
yaffs_FileStructure *fStruct,
__u32 chunkId);
+static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
+ int chunkInNAND,
+ const __u8 *data,
+ yaffs_ExtendedTags *tags);
+
/* Function to calculate chunk and offset */
static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut,
static __u32 Shifts(__u32 x)
{
- int nShifts;
+ __u32 nShifts;
nShifts = 0;
for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
dev->tempBuffer[i].line = 0; /* not in use */
dev->tempBuffer[i].buffer = buf =
- YMALLOC_DMA(dev->totalBytesPerChunk);
+ YMALLOC_DMA(dev->param.totalBytesPerChunk);
}
return buf ? YAFFS_OK : YAFFS_FAIL;
return 1;
}
- for (i = 0; i < dev->nShortOpCaches; i++) {
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
if (dev->srCache[i].data == buffer)
return 1;
}
return 0;
}
-
-
-/*
- * Chunk bitmap manipulations
- */
-
-static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
-{
- if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
- blk));
- YBUG();
- }
- return dev->chunkBits +
- (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
-}
-
-static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
-{
- if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
- chunk < 0 || chunk >= dev->nChunksPerBlock) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
- blk, chunk));
- YBUG();
- }
-}
-
-static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
-{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
-
- memset(blkBits, 0, dev->chunkBitmapStride);
-}
-
-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)
-{
- __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)
-{
- __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)
-{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
- int i;
- for (i = 0; i < dev->chunkBitmapStride; i++) {
- if (*blkBits)
- return 1;
- blkBits++;
- }
- return 0;
-}
-
-static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
-{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
- int i;
- int n = 0;
- for (i = 0; i < dev->chunkBitmapStride; i++) {
- __u8 x = *blkBits;
- while (x) {
- if (x & 1)
- n++;
- x >>= 1;
- }
-
- blkBits++;
- }
- return n;
-}
-
/*
* Verification code
*/
static int yaffs_SkipVerification(yaffs_Device *dev)
{
+ dev=dev;
return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
}
static int yaffs_SkipFullVerification(yaffs_Device *dev)
{
+ dev=dev;
return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
}
static int yaffs_SkipNANDVerification(yaffs_Device *dev)
{
+ dev=dev;
return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
}
"Dead"
};
+
static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
{
int actuallyUsed;
actuallyUsed = bi->pagesInUse - bi->softDeletions;
- if (bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
- bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
- actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
+ 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 that the sequence number is valid.
* Ten million is legal, but is very unlikely
*/
- if (dev->isYaffs2 &&
- (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
- (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
- n, bi->sequenceNumber));
+
+ yaffs2_VerifyBlock(dev,bi,n);
}
+
+
static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
int n)
{
}
}
-static void yaffs_VerifyBlocks(yaffs_Device *dev)
+void yaffs_VerifyBlocks(yaffs_Device *dev)
{
int i;
int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
if (!(tags && obj && oh)) {
T(YAFFS_TRACE_VERIFY,
- (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR),
- (__u32)tags, (__u32)obj, (__u32)oh));
+ (TSTR("Verifying object header tags %p obj %p oh %p"TENDSTR),
+ tags, obj, oh));
return;
}
}
-
+#if 0
+/* Not being used, but don't want to throw away yet */
static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
__u32 level, int chunkOffset)
{
}
+#endif
static void yaffs_VerifyFile(yaffs_Object *obj)
{
actualTallness = obj->variant.fileVariant.topLevel;
- if (requiredTallness > actualTallness)
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
- obj->objectId, actualTallness, requiredTallness));
-
-
/* Check that the chunks in the tnode tree are all correct.
* We do this by scanning through the tnode tree and
* checking the tags for every chunk match.
/* Check sane object header chunk */
- chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
- chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
+ chunkMin = dev->internalStartBlock * dev->param.nChunksPerBlock;
+ chunkMax = (dev->internalEndBlock+1) * dev->param.nChunksPerBlock - 1;
chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
chunkIdOk = chunkInRange || (obj->hdrChunk == 0);
chunkValid = chunkInRange &&
yaffs_CheckChunkBit(dev,
- obj->hdrChunk / dev->nChunksPerBlock,
- obj->hdrChunk % dev->nChunksPerBlock);
+ obj->hdrChunk / dev->param.nChunksPerBlock,
+ obj->hdrChunk % dev->param.nChunksPerBlock);
chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
if (!obj->fake &&
}
}
-static void yaffs_VerifyObjects(yaffs_Device *dev)
+void yaffs_VerifyObjects(yaffs_Device *dev)
{
yaffs_Object *obj;
int i;
}
+
+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;
+
+ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+
+ return retval;
+}
+
static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
const __u8 *data,
yaffs_ExtendedTags *tags,
int writeOk = 0;
int chunk;
- yaffs_InvalidateCheckpoint(dev);
+ yaffs2_InvalidateCheckpoint(dev);
do {
yaffs_BlockInfo *bi = 0;
* chunk due to power loss. This checking policy should
* catch that case with very few checks and thus save a
* lot of checks that are most likely not needed.
+ *
+ * Mods to the above
+ * If an erase check fails or the write fails we skip the
+ * rest of the block.
*/
- if (bi->gcPrioritise) {
- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
- /* try another chunk */
- continue;
- }
/* let's give it a try */
attempts++;
(TSTR("**>> yaffs chunk %d was not erased"
TENDSTR), chunk));
- /* try another 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;
}
- bi->skipErasedCheck = 1;
}
writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
data, tags);
+
+ 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);
- /* try another chunk */
continue;
}
+ bi->skipErasedCheck = 1;
+
/* Copy the data into the robustification buffer */
yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
return chunk;
}
+
+
/*
* Block retiring for handling a broken block.
*/
{
yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
- yaffs_InvalidateCheckpoint(dev);
+ yaffs2_InvalidateCheckpoint(dev);
+
+ yaffs2_ClearOldestDirtySequence(dev,bi);
if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
TENDSTR), blockInNAND));
} else {
yaffs_ExtendedTags tags;
- int chunkId = blockInNAND * dev->nChunksPerBlock;
+ int chunkId = blockInNAND * dev->param.nChunksPerBlock;
__u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
memset(buffer, 0xff, dev->nDataBytesPerChunk);
yaffs_InitialiseTags(&tags);
tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
- if (dev->writeChunkWithTagsToNAND(dev, chunkId -
+ 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")
const __u8 *data,
const yaffs_ExtendedTags *tags)
{
+ dev=dev;
+ chunkInNAND=chunkInNAND;
+ data=data;
+ tags=tags;
}
static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
const yaffs_ExtendedTags *tags)
{
+ dev=dev;
+ chunkInNAND=chunkInNAND;
+ tags=tags;
}
void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
int erasedOk)
{
- int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
+ int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock;
yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
yaffs_HandleChunkError(dev, bi);
/* Delete the chunk */
yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
+ yaffs_SkipRestOfBlock(dev);
}
return sum;
}
-static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
+void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
{
#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
- if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH)
+ 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');
* in the tnode.
*/
-/* yaffs_CreateTnodes creates a bunch more tnodes and
- * adds them to the tnode free list.
- * Don't use this function directly
- */
-
-static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
-{
- int i;
- int tnodeSize;
- yaffs_Tnode *newTnodes;
- __u8 *mem;
- yaffs_Tnode *curr;
- yaffs_Tnode *next;
- yaffs_TnodeList *tnl;
-
- if (nTnodes < 1)
- return YAFFS_OK;
-
- /* Calculate the tnode size in bytes for variable width tnode support.
- * Must be a multiple of 32-bits */
- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
- /* make these things */
-
- newTnodes = YMALLOC(nTnodes * tnodeSize);
- mem = (__u8 *)newTnodes;
-
- if (!newTnodes) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
- return YAFFS_FAIL;
- }
-
- /* Hook them into the free list */
-#if 0
- for (i = 0; i < nTnodes - 1; i++) {
- newTnodes[i].internal[0] = &newTnodes[i + 1];
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- }
-
- newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- dev->freeTnodes = newTnodes;
-#else
- /* New hookup for wide tnodes */
- for (i = 0; i < nTnodes - 1; i++) {
- curr = (yaffs_Tnode *) &mem[i * tnodeSize];
- next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
- curr->internal[0] = next;
- }
-
- curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
- curr->internal[0] = dev->freeTnodes;
- dev->freeTnodes = (yaffs_Tnode *)mem;
-
-#endif
-
-
- dev->nFreeTnodes += nTnodes;
- dev->nTnodesCreated += nTnodes;
-
- /* Now add this bunch of tnodes to a list for freeing up.
- * NB If we can't add this to the management list it isn't fatal
- * but it just means we can't free this bunch of tnodes later.
- */
-
- tnl = YMALLOC(sizeof(yaffs_TnodeList));
- if (!tnl) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs: Could not add tnodes to management list" TENDSTR)));
- return YAFFS_FAIL;
- } else {
- tnl->tnodes = newTnodes;
- tnl->next = dev->allocatedTnodeList;
- dev->allocatedTnodeList = tnl;
- }
-
- T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
-
- return YAFFS_OK;
-}
-/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
-
-static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
+yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
{
- yaffs_Tnode *tn = NULL;
-
- /* If there are none left make more */
- if (!dev->freeTnodes)
- yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
-
- if (dev->freeTnodes) {
- tn = dev->freeTnodes;
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
- /* Hoosterman, this thing looks like it isn't in the list */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
- }
-#endif
- dev->freeTnodes = dev->freeTnodes->internal[0];
- dev->nFreeTnodes--;
+ yaffs_Tnode *tn = yaffs_AllocateRawTnode(dev);
+ if (tn){
+ memset(tn, 0, dev->tnodeSize);
+ dev->nTnodes++;
}
dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
return tn;
}
-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
-{
- yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
- if (tn)
- memset(tn, 0, tnodeSize);
-
- return tn;
-}
-
/* FreeTnode frees up a tnode and puts it back on the free list */
static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
{
- if (tn) {
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
- /* Hoosterman, this thing looks like it is already in the list */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
- }
- tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- tn->internal[0] = dev->freeTnodes;
- dev->freeTnodes = tn;
- dev->nFreeTnodes++;
- }
+ yaffs_FreeRawTnode(dev,tn);
+ dev->nTnodes--;
dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
}
-static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
-{
- /* Free the list of allocated tnodes */
- yaffs_TnodeList *tmp;
-
- while (dev->allocatedTnodeList) {
- tmp = dev->allocatedTnodeList->next;
-
- YFREE(dev->allocatedTnodeList->tnodes);
- YFREE(dev->allocatedTnodeList);
- dev->allocatedTnodeList = tmp;
-
- }
-
- dev->freeTnodes = NULL;
- dev->nFreeTnodes = 0;
-}
-
-static void yaffs_InitialiseTnodes(yaffs_Device *dev)
+static void yaffs_DeinitialiseTnodesAndObjects(yaffs_Device *dev)
{
- dev->allocatedTnodeList = NULL;
- dev->freeTnodes = NULL;
- dev->nFreeTnodes = 0;
- dev->nTnodesCreated = 0;
+ yaffs_DeinitialiseRawTnodesAndObjects(dev);
+ dev->nObjects = 0;
+ dev->nTnodes = 0;
}
int requiredTallness;
int level = fStruct->topLevel;
+ dev=dev;
+
/* Check sane level and chunk Id */
if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
return NULL;
* be plugged into the ttree.
*/
-static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
+yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
yaffs_FileStructure *fStruct,
__u32 chunkId,
yaffs_Tnode *passedTn)
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) {
int j;
for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
- if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock,
- theChunk % dev->nChunksPerBlock)) {
+ if (yaffs_CheckChunkBit(dev, theChunk / dev->param.nChunksPerBlock,
+ theChunk % dev->param.nChunksPerBlock)) {
if(dev->chunkGroupSize == 1)
return theChunk;
return -1;
}
-
+#if 0
+/* Experimental code not being used yet. Might speed up file deletion */
/* DeleteWorker scans backwards through the tnode tree and deletes all the
- * chunks and tnodes in the file
+ * 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.
*/
}
+#endif
+
static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
{
yaffs_BlockInfo *theBlock;
+ unsigned blockNo;
T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
- theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock);
+ blockNo = chunk / dev->param.nChunksPerBlock;
+ theBlock = yaffs_GetBlockInfo(dev, blockNo);
if (theBlock) {
theBlock->softDeletions++;
dev->nFreeChunks++;
+ yaffs2_UpdateOldestDirtySequence(dev, blockNo, theBlock);
}
}
* 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,
if (tn) {
hasData = 0;
- for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
- if (tn->internal[i] && level > 0) {
- tn->internal[i] =
- yaffs_PruneWorker(dev, tn->internal[i],
- level - 1,
- (i == 0) ? del0 : 1);
+ if(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);
+ }
+
+ if (tn->internal[i])
+ hasData++;
}
+ } else {
+ int tnodeSize_u32 = dev->tnodeSize/sizeof(__u32);
+ __u32 *map = (__u32 *)tn;
- if (tn->internal[i])
- hasData++;
- }
+ for(i = 0; !hasData && i < tnodeSize_u32; i++){
+ if(map[i])
+ hasData++;
+ }
+ }
if (hasData == 0 && del0) {
/* Free and return NULL */
/*-------------------- End of File Structure functions.-------------------*/
-/* yaffs_CreateFreeObjects creates a bunch more objects and
- * adds them to the object free list.
- */
-static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
-{
- int i;
- yaffs_Object *newObjects;
- yaffs_ObjectList *list;
-
- if (nObjects < 1)
- return YAFFS_OK;
-
- /* make these things */
- newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
- list = YMALLOC(sizeof(yaffs_ObjectList));
-
- if (!newObjects || !list) {
- if (newObjects){
- YFREE(newObjects);
- newObjects = NULL;
- }
- if (list){
- YFREE(list);
- list = NULL;
- }
- T(YAFFS_TRACE_ALLOCATE,
- (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
- return YAFFS_FAIL;
- }
-
- /* Hook them into the free list */
- for (i = 0; i < nObjects - 1; i++) {
- newObjects[i].siblings.next =
- (struct ylist_head *)(&newObjects[i + 1]);
- }
-
- newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
- dev->freeObjects = newObjects;
- dev->nFreeObjects += nObjects;
- dev->nObjectsCreated += nObjects;
-
- /* Now add this bunch of Objects to a list for freeing up. */
-
- list->objects = newObjects;
- list->next = dev->allocatedObjectList;
- dev->allocatedObjectList = list;
-
- return YAFFS_OK;
-}
-
/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
{
- yaffs_Object *tn = NULL;
+ yaffs_Object *obj = yaffs_AllocateRawObject(dev);
-#ifdef VALGRIND_TEST
- tn = YMALLOC(sizeof(yaffs_Object));
-#else
- /* If there are none left make more */
- if (!dev->freeObjects)
- yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
+ if (obj) {
+ dev->nObjects++;
- if (dev->freeObjects) {
- tn = dev->freeObjects;
- dev->freeObjects =
- (yaffs_Object *) (dev->freeObjects->siblings.next);
- dev->nFreeObjects--;
- }
-#endif
- if (tn) {
/* Now sweeten it up... */
- memset(tn, 0, sizeof(yaffs_Object));
- tn->beingCreated = 1;
+ memset(obj, 0, sizeof(yaffs_Object));
+ obj->beingCreated = 1;
- tn->myDev = dev;
- tn->hdrChunk = 0;
- tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
- YINIT_LIST_HEAD(&(tn->hardLinks));
- YINIT_LIST_HEAD(&(tn->hashLink));
- YINIT_LIST_HEAD(&tn->siblings);
+ obj->myDev = dev;
+ obj->hdrChunk = 0;
+ obj->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
+ YINIT_LIST_HEAD(&(obj->hardLinks));
+ YINIT_LIST_HEAD(&(obj->hashLink));
+ YINIT_LIST_HEAD(&obj->siblings);
/* Now make the directory sane */
if (dev->rootDir) {
- tn->parent = dev->rootDir;
- ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
+ obj->parent = dev->rootDir;
+ ylist_add(&(obj->siblings), &dev->rootDir->variant.directoryVariant.children);
}
/* Add it to the lost and found directory.
* check if lostNFound exists first
*/
if (dev->lostNFoundDir)
- yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
+ yaffs_AddObjectToDirectory(dev->lostNFoundDir, obj);
- tn->beingCreated = 0;
+ obj->beingCreated = 0;
}
dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
- return tn;
+ return obj;
}
static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
}
-static void yaffs_UnhashObject(yaffs_Object *tn)
+static void yaffs_UnhashObject(yaffs_Object *obj)
{
int bucket;
- yaffs_Device *dev = tn->myDev;
+ yaffs_Device *dev = obj->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);
+ if (!ylist_empty(&obj->hashLink)) {
+ ylist_del_init(&obj->hashLink);
+ bucket = yaffs_HashFunction(obj->objectId);
dev->objectBucket[bucket].count--;
}
}
/* FreeObject frees up a Object and puts it back on the free list */
-static void yaffs_FreeObject(yaffs_Object *tn)
+static void yaffs_FreeObject(yaffs_Object *obj)
{
- yaffs_Device *dev = tn->myDev;
+ yaffs_Device *dev = obj->myDev;
-#ifdef __KERNEL__
- T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
-#endif
+ T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), obj, obj->myInode));
- if (tn->parent)
+ if (!obj)
+ YBUG();
+ if (obj->parent)
YBUG();
- if (!ylist_empty(&tn->siblings))
+ if (!ylist_empty(&obj->siblings))
YBUG();
-#ifdef __KERNEL__
- if (tn->myInode) {
+ if (obj->myInode) {
/* We're still hooked up to a cached inode.
* Don't delete now, but mark for later deletion
*/
- tn->deferedFree = 1;
+ obj->deferedFree = 1;
return;
}
-#endif
- yaffs_UnhashObject(tn);
+ yaffs_UnhashObject(obj);
-#ifdef VALGRIND_TEST
- YFREE(tn);
- tn = NULL;
-#else
- /* Link into the free list. */
- tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
- dev->freeObjects = tn;
- dev->nFreeObjects++;
-#endif
+ yaffs_FreeRawObject(dev,obj);
+ dev->nObjects--;
dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
}
-#ifdef __KERNEL__
void yaffs_HandleDeferedFree(yaffs_Object *obj)
{
yaffs_FreeObject(obj);
}
-#endif
-
-static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
-{
- /* Free the list of allocated Objects */
-
- yaffs_ObjectList *tmp;
-
- while (dev->allocatedObjectList) {
- tmp = dev->allocatedObjectList->next;
- YFREE(dev->allocatedObjectList->objects);
- YFREE(dev->allocatedObjectList);
-
- dev->allocatedObjectList = tmp;
- }
-
- dev->freeObjects = NULL;
- dev->nFreeObjects = 0;
-}
-
-static void yaffs_InitialiseObjects(yaffs_Device *dev)
+static void yaffs_InitialiseTnodesAndObjects(yaffs_Device *dev)
{
int i;
- dev->allocatedObjectList = NULL;
- dev->freeObjects = NULL;
- dev->nFreeObjects = 0;
+ dev->nObjects = 0;
+ dev->nTnodes = 0;
+
+ yaffs_InitialiseRawTnodesAndObjects(dev);
for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
YINIT_LIST_HEAD(&dev->objectBucket[i].list);
static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
{
- static int x;
int i;
int l = 999;
int lowest = 999999;
- /* First let's see if we can find one that's empty. */
-
- for (i = 0; i < 10 && lowest > 0; i++) {
- x++;
- x %= YAFFS_NOBJECT_BUCKETS;
- if (dev->objectBucket[x].count < lowest) {
- lowest = dev->objectBucket[x].count;
- l = x;
- }
-
- }
- /* If we didn't find an empty list, then try
- * looking a bit further for a short one
+ /* Search for the shortest list or one that
+ * isn't too long.
*/
- 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;
+ 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;
}
}
if (i) {
in = ylist_entry(i, yaffs_Object, hashLink);
if (in->objectId == number) {
-#ifdef __KERNEL__
+
/* Don't tell the VFS about this one if it is defered free */
if (in->deferedFree)
return NULL;
-#endif
return in;
}
yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
yaffs_ObjectType type)
{
- yaffs_Object *theObject;
+ yaffs_Object *theObject=NULL;
yaffs_Tnode *tn = NULL;
if (number < 0)
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:
return theObject;
}
-static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
- int number,
- yaffs_ObjectType type)
+yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
+ int number,
+ yaffs_ObjectType type)
{
yaffs_Object *theObject = NULL;
}
-static YCHAR *yaffs_CloneString(const YCHAR *str)
+YCHAR *yaffs_CloneString(const YCHAR *str)
{
YCHAR *newStr = NULL;
+ int len;
if (!str)
str = _Y("");
- newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
- if (newStr)
- yaffs_strcpy(newStr, str);
-
+ len = yaffs_strnlen(str,YAFFS_MAX_ALIAS_LENGTH);
+ newStr = YMALLOC((len + 1) * sizeof(YCHAR));
+ if (newStr){
+ yaffs_strncpy(newStr, str,len);
+ newStr[len] = 0;
+ }
return newStr;
}
+
if (in) {
in->hdrChunk = 0;
in->valid = 1;
break;
}
- if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
+ if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0, NULL) < 0) {
/* Could not create the object header, fail the creation */
yaffs_DeleteObject(in);
in = NULL;
}
/* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
- if (obj->myDev->isYaffs2)
+ if (obj->myDev->param.isYaffs2)
unlinkOp = (newDir == obj->myDev->unlinkedDir);
else
unlinkOp = (newDir == obj->myDev->unlinkedDir
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)
+ if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows, NULL) >= 0)
return YAFFS_OK;
}
force = 1;
#endif
- if(yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
+ if(yaffs_strnlen(newName,YAFFS_MAX_NAME_LENGTH+1) > YAFFS_MAX_NAME_LENGTH)
/* ENAMETOOLONG */
return YAFFS_FAIL;
* Note we must disable gc otherwise it can mess up the shadowing.
*
*/
- dev->isDoingGC=1;
+ dev->gcDisable=1;
yaffs_ChangeObjectName(obj, newDir, newName, force,
existingTarget->objectId);
existingTarget->isShadowed = 1;
yaffs_UnlinkObject(existingTarget);
- dev->isDoingGC=0;
+ dev->gcDisable=0;
}
result = yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
if (dev->blockInfo) {
/* Set up dynamic blockinfo stuff. */
- dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
+ 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->chunkBits = NULL;
}
-static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
- yaffs_BlockInfo *bi)
+void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
{
- int i;
- __u32 seq;
- yaffs_BlockInfo *b;
-
- if (!dev->isYaffs2)
- return 1; /* disqualification only applies to yaffs2. */
-
- if (!bi->hasShrinkHeader)
- return 1; /* can gc */
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
- /* Find the oldest dirty sequence number if we don't know it and save it
- * so we don't have to keep recomputing it.
- */
- if (!dev->oldestDirtySequence) {
- seq = dev->sequenceNumber;
-
- for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
- i++) {
- b = yaffs_GetBlockInfo(dev, i);
- if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
- (b->pagesInUse - b->softDeletions) <
- dev->nChunksPerBlock && b->sequenceNumber < seq) {
- seq = b->sequenceNumber;
- }
- }
- dev->oldestDirtySequence = seq;
- }
+ int erasedOk = 0;
- /* Can't do gc of this block if there are any blocks older than this one that have
- * discarded pages.
+ /* If the block is still healthy erase it and mark as clean.
+ * If the block has had a data failure, then retire it.
*/
- return (bi->sequenceNumber <= dev->oldestDirtySequence);
-}
-/* FindDiretiestBlock is used to select the dirtiest block (or close enough)
- * for garbage collection.
- */
+ T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
+ (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
+ blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
-static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
- int aggressive)
-{
- int b = dev->currentDirtyChecker;
+ yaffs2_ClearOldestDirtySequence(dev,bi);
- int i;
- int iterations;
- int dirtiest = -1;
- int pagesInUse = 0;
- int prioritised = 0;
- yaffs_BlockInfo *bi;
- int pendingPrioritisedExist = 0;
+ bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
- /* First let's see if we need to grab a prioritised block */
- if (dev->hasPendingPrioritisedGCs) {
- for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) {
+ /* If this is the block being garbage collected then stop gc'ing this block */
+ if(blockNo == dev->gcBlock)
+ dev->gcBlock = 0;
- bi = yaffs_GetBlockInfo(dev, i);
- /* yaffs_VerifyBlock(dev,bi,i); */
-
- if (bi->gcPrioritise) {
- pendingPrioritisedExist = 1;
- if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
- pagesInUse = (bi->pagesInUse - bi->softDeletions);
- dirtiest = i;
- prioritised = 1;
- aggressive = 1; /* Fool the non-aggressive skip logiv below */
- }
- }
- }
-
- if (!pendingPrioritisedExist) /* None found, so we can clear this */
- dev->hasPendingPrioritisedGCs = 0;
- }
-
- /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
- * search harder.
- * else (we're doing a leasurely gc), then we only bother to do this if the
- * block has only a few pages in use.
- */
-
- dev->nonAggressiveSkip--;
-
- if (!aggressive && (dev->nonAggressiveSkip > 0))
- return -1;
-
- if (!prioritised)
- pagesInUse =
- (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
-
- if (aggressive)
- iterations =
- dev->internalEndBlock - dev->internalStartBlock + 1;
- else {
- iterations =
- dev->internalEndBlock - dev->internalStartBlock + 1;
- iterations = iterations / 16;
- if (iterations > 200)
- iterations = 200;
- }
-
- for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
- b++;
- if (b < dev->internalStartBlock || b > dev->internalEndBlock)
- b = dev->internalStartBlock;
-
- if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> Block %d is not valid" TENDSTR), b));
- YBUG();
- }
-
- bi = yaffs_GetBlockInfo(dev, b);
-
- if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
- (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
- dirtiest = b;
- pagesInUse = (bi->pagesInUse - bi->softDeletions);
- }
- }
-
- dev->currentDirtyChecker = b;
-
- if (dirtiest > 0) {
- T(YAFFS_TRACE_GC,
- (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
- dev->nChunksPerBlock - pagesInUse, prioritised));
- }
-
- dev->oldestDirtySequence = 0;
-
- if (dirtiest > 0)
- dev->nonAggressiveSkip = 4;
-
- return dirtiest;
-}
-
-static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
-{
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
-
- int erasedOk = 0;
-
- /* If the block is still healthy erase it and mark as clean.
- * If the block has had a data failure, then retire it.
- */
-
- T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
- (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
- blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
-
- bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
+ /* If this block is currently the best candidate for gc then drop as a candidate */
+ if(blockNo == dev->gcDirtiest){
+ dev->gcDirtiest = 0;
+ dev->gcPagesInUse = 0;
+ }
if (!bi->needsRetiring) {
- yaffs_InvalidateCheckpoint(dev);
+ yaffs2_InvalidateCheckpoint(dev);
erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
if (!erasedOk) {
dev->nErasureFailures++;
if (erasedOk &&
((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
int i;
- for (i = 0; i < dev->nChunksPerBlock; i++) {
+ for (i = 0; i < dev->param.nChunksPerBlock; i++) {
if (!yaffs_CheckChunkErased
- (dev, blockNo * dev->nChunksPerBlock + i)) {
+ (dev, blockNo * dev->param.nChunksPerBlock + i)) {
T(YAFFS_TRACE_ERROR,
(TSTR
(">>Block %d erasure supposedly OK, but chunk %d not erased"
if (erasedOk) {
/* Clean it up... */
bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
+ bi->sequenceNumber = 0;
dev->nErasedBlocks++;
bi->pagesInUse = 0;
bi->softDeletions = 0;
T(YAFFS_TRACE_ERASE,
(TSTR("Erased block %d" TENDSTR), blockNo));
} else {
- dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */
+ dev->nFreeChunks -= dev->param.nChunksPerBlock; /* We lost a block of free space */
yaffs_RetireBlock(dev, blockNo);
T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
}
-
-static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
-{
- if (!dev->nCheckpointBlocksRequired &&
- dev->isYaffs2) {
- /* Not a valid value so recalculate */
- int nBytes = 0;
- int nBlocks;
- int devBlocks = (dev->endBlock - dev->startBlock + 1);
- int tnodeSize;
-
- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
- nBytes += sizeof(yaffs_CheckpointValidity);
- nBytes += sizeof(yaffs_CheckpointDevice);
- nBytes += devBlocks * sizeof(yaffs_BlockInfo);
- nBytes += devBlocks * dev->chunkBitmapStride;
- nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
- nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
- nBytes += sizeof(yaffs_CheckpointValidity);
- nBytes += sizeof(__u32); /* checksum*/
-
- /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
-
- nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
-
- dev->nCheckpointBlocksRequired = nBlocks;
- }
-
- return dev->nCheckpointBlocksRequired;
-}
-
/*
* Check if there's space to allocate...
* Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
*/
-static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
+int yaffs_CheckSpaceForAllocation(yaffs_Device *dev, int nChunks)
{
int reservedChunks;
- int reservedBlocks = dev->nReservedBlocks;
+ int reservedBlocks = dev->param.nReservedBlocks;
int checkpointBlocks;
- if (dev->isYaffs2) {
- checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
- dev->blocksInCheckpoint;
- if (checkpointBlocks < 0)
- checkpointBlocks = 0;
- } else {
- checkpointBlocks = 0;
- }
+ checkpointBlocks = yaffs2_CalcCheckpointBlocksRequired(dev);
- reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
+ reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->param.nChunksPerBlock);
- return (dev->nFreeChunks > reservedChunks);
+ return (dev->nFreeChunks > (reservedChunks + nChunks));
}
static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
dev->allocationPage = 0;
}
- if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
+ 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->nReservedBlocks
+ if (dev->nErasedBlocks < dev->param.nReservedBlocks
&& dev->allocationPage == 0) {
T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
}
if (dev->allocationBlock >= 0) {
bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
- retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
+ retVal = (dev->allocationBlock * dev->param.nChunksPerBlock) +
dev->allocationPage;
bi->pagesInUse++;
yaffs_SetChunkBit(dev, dev->allocationBlock,
dev->nFreeChunks--;
/* If the block is full set the state to full */
- if (dev->allocationPage >= dev->nChunksPerBlock) {
+ if (dev->allocationPage >= dev->param.nChunksPerBlock) {
bi->blockState = YAFFS_BLOCK_STATE_FULL;
dev->allocationBlock = -1;
}
{
int n;
- n = dev->nErasedBlocks * dev->nChunksPerBlock;
+ n = dev->nErasedBlocks * dev->param.nChunksPerBlock;
if (dev->allocationBlock > 0)
- n += (dev->nChunksPerBlock - dev->allocationPage);
+ 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.
+ */
+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)
{
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;
+ dev->gcDisable = 1;
if (isCheckpointBlock ||
!yaffs_StillSomeChunkBits(dev, block)) {
yaffs_VerifyBlock(dev, bi, block);
- maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
- oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
+ maxCopies = (wholeBlock) ? dev->param.nChunksPerBlock : 5;
+ oldChunk = block * dev->param.nChunksPerBlock + dev->gcChunk;
for (/* init already done */;
retVal == YAFFS_OK &&
- dev->gcChunk < dev->nChunksPerBlock &&
+ dev->gcChunk < dev->param.nChunksPerBlock &&
(bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
maxCopies > 0;
dev->gcChunk++, oldChunk++) {
* No need to copy this, just forget about it and
* fix up the object.
*/
+
+ /* Free chunks already includes softdeleted chunks.
+ * How ever this chunk is going to soon be really deleted
+ * which will increment free chunks.
+ * We have to decrement free chunks so this works out properly.
+ */
+ dev->nFreeChunks--;
object->nDataChunks--;
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;
- yaffs_VerifyObjectHeader(object, oh, &tags, 1);
- }
+ 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;
+ }
- newChunk =
- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
+ 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;
object->serial = tags.serialNumber;
} else {
/* It's a data chunk */
- yaffs_PutChunkIntoFile
+ int ok;
+ ok = yaffs_PutChunkIntoFile
(object,
tags.chunkId,
newChunk, 0);
yaffs_VerifyCollectedBlock(dev, bi, block);
- 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));
- }
- /* If the gc completed then clear the current gcBlock so that we find another. */
- if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
- dev->gcBlock = -1;
+
+ if (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
+ /*
+ * The gc did not complete. Set block state back to FULL
+ * because checkpointing does not restore gc.
+ */
+ bi->blockState = YAFFS_BLOCK_STATE_FULL;
+ } else {
+ /* The gc completed. */
+ chunksAfter = yaffs_GetErasedChunks(dev);
+ if (chunksBefore >= chunksAfter) {
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("gc did not increase free chunks before %d after %d"
+ TENDSTR), chunksBefore, chunksAfter));
+ }
+ dev->gcBlock = 0;
dev->gcChunk = 0;
}
- dev->isDoingGC = 0;
+ dev->gcDisable = 0;
return retVal;
}
+/*
+ * FindBlockForgarbageCollection is used to select the dirtiest block (or close enough)
+ * for garbage collection.
+ */
+
+static unsigned yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
+ int aggressive,
+ int background)
+{
+ int i;
+ int iterations;
+ unsigned selected = 0;
+ int prioritised = 0;
+ int prioritisedExists = 0;
+ yaffs_BlockInfo *bi;
+ int threshold;
+
+ /* First let's see if we need to grab a prioritised block */
+ if (dev->hasPendingPrioritisedGCs && !aggressive) {
+ dev->gcDirtiest = 0;
+ bi = dev->blockInfo;
+ for (i = dev->internalStartBlock;
+ i <= dev->internalEndBlock && !selected;
+ i++) {
+
+ if (bi->gcPrioritise) {
+ prioritisedExists = 1;
+ if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+ yaffs2_BlockNotDisqualifiedFromGC(dev, bi)) {
+ selected = i;
+ prioritised = 1;
+ }
+ }
+ bi++;
+ }
+
+ /*
+ * If there is a prioritised block and none was selected then
+ * this happened because there is at least one old dirty block gumming
+ * up the works. Let's gc the oldest dirty block.
+ */
+
+ if(prioritisedExists &&
+ !selected &&
+ dev->oldestDirtyBlock > 0)
+ selected = dev->oldestDirtyBlock;
+
+ if (!prioritisedExists) /* 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.
+ */
+
+ if (!selected){
+ int pagesUsed;
+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
+ if (aggressive){
+ threshold = dev->param.nChunksPerBlock;
+ iterations = nBlocks;
+ } else {
+ int maxThreshold = dev->param.nChunksPerBlock/2;
+ threshold = background ?
+ (dev->gcNotDone + 2) * 2 : 0;
+ if(threshold <YAFFS_GC_PASSIVE_THRESHOLD)
+ threshold = YAFFS_GC_PASSIVE_THRESHOLD;
+ if(threshold > maxThreshold)
+ threshold = maxThreshold;
+
+ iterations = nBlocks / 16 + 1;
+ if (iterations > 100)
+ iterations = 100;
+ }
+
+ for (i = 0;
+ i < iterations &&
+ (dev->gcDirtiest < 1 ||
+ dev->gcPagesInUse > YAFFS_GC_GOOD_ENOUGH);
+ i++) {
+ dev->gcBlockFinder++;
+ if (dev->gcBlockFinder < dev->internalStartBlock ||
+ dev->gcBlockFinder > dev->internalEndBlock)
+ dev->gcBlockFinder = dev->internalStartBlock;
+
+ bi = yaffs_GetBlockInfo(dev, dev->gcBlockFinder);
+
+ pagesUsed = bi->pagesInUse - bi->softDeletions;
+
+ if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+ pagesUsed < dev->param.nChunksPerBlock &&
+ (dev->gcDirtiest < 1 || pagesUsed < dev->gcPagesInUse) &&
+ yaffs2_BlockNotDisqualifiedFromGC(dev, bi)) {
+ dev->gcDirtiest = dev->gcBlockFinder;
+ dev->gcPagesInUse = pagesUsed;
+ }
+ }
+
+ if(dev->gcDirtiest > 0 && dev->gcPagesInUse <= threshold)
+ selected = dev->gcDirtiest;
+ }
+
+ /*
+ * If nothing has been selected for a while, try selecting the oldest dirty
+ * because that's gumming up the works.
+ */
+
+ if(!selected && dev->param.isYaffs2 &&
+ dev->gcNotDone >= ( background ? 10 : 20)){
+ yaffs2_FindOldestDirtySequence(dev);
+ if(dev->oldestDirtyBlock > 0) {
+ selected = dev->oldestDirtyBlock;
+ dev->gcDirtiest = selected;
+ dev->oldestDirtyGCs++;
+ bi = yaffs_GetBlockInfo(dev, selected);
+ dev->gcPagesInUse = bi->pagesInUse - bi->softDeletions;
+ } else
+ dev->gcNotDone = 0;
+ }
+
+ if(selected){
+ T(YAFFS_TRACE_GC,
+ (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR),
+ selected,
+ dev->param.nChunksPerBlock - dev->gcPagesInUse,
+ prioritised));
+
+ if(background)
+ dev->backgroundGCs++;
+ dev->gcDirtiest = 0;
+ dev->gcPagesInUse = 0;
+ dev->gcNotDone = 0;
+ if(dev->refreshSkip > 0)
+ dev->refreshSkip--;
+ } else{
+ dev->gcNotDone++;
+ T(YAFFS_TRACE_GC,
+ (TSTR("GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s" TENDSTR),
+ dev->gcBlockFinder, dev->gcNotDone,
+ threshold,
+ dev->gcDirtiest, dev->gcPagesInUse,
+ dev->oldestDirtyBlock,
+ background ? " bg" : ""));
+ }
+
+ return selected;
+}
+
/* New garbage collector
* If we're very low on erased blocks then we do aggressive garbage collection
* otherwise we do "leasurely" garbage collection.
* 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)
+static int yaffs_CheckGarbageCollection(yaffs_Device *dev, int background)
{
- int block;
- int aggressive;
+ int aggressive = 0;
int gcOk = YAFFS_OK;
int maxTries = 0;
+ int minErased;
+ int erasedChunks;
+
int checkpointBlockAdjust;
- if (dev->isDoingGC) {
+ if(dev->param.gcControl &&
+ (dev->param.gcControl(dev) & 1) == 0)
+ return YAFFS_OK;
+
+ if (dev->gcDisable) {
/* 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.
+ * We'll only see looping here if the collection does not increase space.
*/
do {
maxTries++;
- checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
- if (checkpointBlockAdjust < 0)
- checkpointBlockAdjust = 0;
+ checkpointBlockAdjust = yaffs2_CalcCheckpointBlocksRequired(dev);
- if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
- /* We need a block soon...*/
+ minErased = dev->param.nReservedBlocks + checkpointBlockAdjust + 1;
+ erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
+
+ /* If we need a block soon then do aggressive gc.*/
+ if (dev->nErasedBlocks < minErased)
aggressive = 1;
- } else {
- /* We're in no hurry */
- aggressive = 0;
+ else {
+ if(dev->gcSkip > 20)
+ dev->gcSkip = 20;
+ if(erasedChunks < dev->nFreeChunks/2 ||
+ dev->gcSkip < 1 ||
+ background)
+ aggressive = 0;
+ else {
+ dev->gcSkip--;
+ break;
+ }
}
- if (dev->gcBlock <= 0) {
- dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
+ dev->gcSkip = 5;
+
+ /* If we don't already have a block being gc'd then see if we should start another */
+
+ if (dev->gcBlock < 1 && !aggressive) {
+ dev->gcBlock = yaffs2_FindRefreshBlock(dev);
+ dev->gcChunk = 0;
+ }
+ if (dev->gcBlock < 1) {
+ dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive, background);
dev->gcChunk = 0;
}
- block = dev->gcBlock;
-
- if (block > 0) {
- dev->garbageCollections++;
+ if (dev->gcBlock > 0) {
+ dev->allGCs++;
if (!aggressive)
- dev->passiveGarbageCollections++;
+ dev->passiveGCs++;
T(YAFFS_TRACE_GC,
(TSTR
("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
dev->nErasedBlocks, aggressive));
- gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
+ gcOk = yaffs_GarbageCollectBlock(dev, dev->gcBlock, aggressive);
}
- if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) {
+ if (dev->nErasedBlocks < (dev->param.nReservedBlocks) && dev->gcBlock > 0) {
T(YAFFS_TRACE_GC,
(TSTR
("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
- TENDSTR), dev->nErasedBlocks, maxTries, block));
+ TENDSTR), dev->nErasedBlocks, maxTries, dev->gcBlock));
}
- } while ((dev->nErasedBlocks < dev->nReservedBlocks) &&
- (block > 0) &&
+ } while ((dev->nErasedBlocks < dev->param.nReservedBlocks) &&
+ (dev->gcBlock > 0) &&
(maxTries < 2));
return aggressive ? gcOk : YAFFS_OK;
}
+/*
+ * yaffs_BackgroundGarbageCollect()
+ * Garbage collects. Intended to be called from a background thread.
+ * Returns non-zero if at least half the free chunks are erased.
+ */
+int yaffs_BackgroundGarbageCollect(yaffs_Device *dev, unsigned urgency)
+{
+ int erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
+
+ T(YAFFS_TRACE_BACKGROUND, (TSTR("Background gc %u" TENDSTR),urgency));
+
+ yaffs_CheckGarbageCollection(dev, 1);
+ return erasedChunks > dev->nFreeChunks/2;
+}
+
/*------------------------- TAGS --------------------------------*/
static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
if (yaffs_CheckChunkBits
- (dev, theChunk / dev->nChunksPerBlock,
- theChunk % dev->nChunksPerBlock)) {
+ (dev, theChunk / dev->param.nChunksPerBlock,
+ theChunk % dev->param.nChunksPerBlock)) {
yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
tags,
#endif
-static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
- int chunkInNAND, int inScan)
+int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
+ int chunkInNAND, int inScan)
{
/* NB inScan is zero unless scanning.
* For forward scanning, inScan is > 0;
if(!chunkInNAND)
/* Dummy insert, bail now */
return YAFFS_OK;
-
existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
*/
if (existingChunk > 0) {
- /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
+ /* NB Right now existing chunk will not be real chunkId if the chunk group size > 1
* thus we have to do a FindChunkInFile to get the real chunk id.
*
* We have a duplicate now we need to decide which one to use:
}
if ((inScan > 0) &&
- (in->myDev->isYaffs2 ||
- existingChunk <= 0 ||
+ (existingChunk <= 0 ||
((existingSerial + 1) & 3) == newSerial)) {
/* Forward scanning.
* Use new
return;
dev->nDeletions++;
- block = chunkId / dev->nChunksPerBlock;
- page = chunkId % dev->nChunksPerBlock;
+ block = chunkId / dev->param.nChunksPerBlock;
+ page = chunkId % dev->param.nChunksPerBlock;
if (!yaffs_CheckChunkBit(dev, block, page))
chunkId));
bi = yaffs_GetBlockInfo(dev, block);
+
+ yaffs2_UpdateOldestDirtySequence(dev, block, bi);
T(YAFFS_TRACE_DELETION,
(TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
- if (markNAND &&
- bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
+ if (!dev->param.isYaffs2 && markNAND &&
+ bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
yaffs_InitialiseTags(&tags);
yaffs_Device *dev = in->myDev;
- yaffs_CheckGarbageCollection(dev);
+ yaffs_CheckGarbageCollection(dev,0);
- /* Get the previous chunk at this location in the file if it exists */
+ /* 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);
(prevChunkId > 0) ? prevTags.serialNumber + 1 : 1;
newTags.byteCount = nBytes;
- if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
+ if (nBytes < 1 || nBytes > dev->param.totalBytesPerChunk) {
T(YAFFS_TRACE_ERROR,
(TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
YBUG();
}
- /*
- * If there isn't already a chunk there then do a dummy
- * insert to make sue we have the desired tnode structure.
- */
- if(prevChunkId < 1 &&
- yaffs_PutChunkIntoFile(in, chunkInInode, 0, 0) != YAFFS_OK)
- return -1;
newChunkId =
yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
* 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)
+ int isShrink, int shadows, yaffs_XAttrMod *xmod)
{
yaffs_BlockInfo *bi;
if (!in->fake ||
in == dev->rootDir || /* The rootDir should also be saved */
- force) {
+ force || xmod) {
- yaffs_CheckGarbageCollection(dev);
+ yaffs_CheckGarbageCollection(dev,0);
yaffs_CheckObjectDetailsLoaded(in);
buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
memcpy(oldName, oh->name, sizeof(oh->name));
- }
-
- memset(buffer, 0xFF, dev->nDataBytesPerChunk);
+ memset(buffer, 0xFF, sizeof(yaffs_ObjectHeader));
+ } else
+ memset(buffer, 0xFF, dev->nDataBytesPerChunk);
oh->type = in->variantType;
oh->yst_mode = in->yst_mode;
break;
}
+ /* process any xattrib modifications */
+ if(xmod)
+ yaffs_ApplyXMod(dev, (char *)buffer, xmod);
+
+
/* Tags */
yaffs_InitialiseTags(&newTags);
in->serial++;
/* 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);
+ newChunkId / in->myDev->param.nChunksPerBlock);
bi->hasShrinkHeader = 1;
}
yaffs_Device *dev = obj->myDev;
int i;
yaffs_ChunkCache *cache;
- int nCaches = obj->myDev->nShortOpCaches;
+ int nCaches = obj->myDev->param.nShortOpCaches;
for (i = 0; i < nCaches; i++) {
cache = &dev->srCache[i];
int i;
yaffs_ChunkCache *cache;
int chunkWritten = 0;
- int nCaches = obj->myDev->nShortOpCaches;
+ int nCaches = obj->myDev->param.nShortOpCaches;
if (nCaches > 0) {
do {
void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
{
yaffs_Object *obj;
- int nCaches = dev->nShortOpCaches;
+ int nCaches = dev->param.nShortOpCaches;
int i;
/* Find a dirty object in the cache and flush it...
{
int i;
- if (dev->nShortOpCaches > 0) {
- for (i = 0; i < dev->nShortOpCaches; i++) {
+ if (dev->param.nShortOpCaches > 0) {
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
if (!dev->srCache[i].object)
return &dev->srCache[i];
}
int i;
int pushout;
- if (dev->nShortOpCaches > 0) {
+ if (dev->param.nShortOpCaches > 0) {
/* Try find a non-dirty one... */
cache = yaffs_GrabChunkCacheWorker(dev);
cache = NULL;
pushout = -1;
- for (i = 0; i < dev->nShortOpCaches; i++) {
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
if (dev->srCache[i].object &&
!dev->srCache[i].locked &&
(dev->srCache[i].lastUse < usage || !cache)) {
{
yaffs_Device *dev = obj->myDev;
int i;
- if (dev->nShortOpCaches > 0) {
- for (i = 0; i < dev->nShortOpCaches; 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++;
int isAWrite)
{
- if (dev->nShortOpCaches > 0) {
+ if (dev->param.nShortOpCaches > 0) {
if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
/* Reset the cache usages */
int i;
- for (i = 1; i < dev->nShortOpCaches; i++)
+ for (i = 1; i < dev->param.nShortOpCaches; i++)
dev->srCache[i].lastUse = 0;
dev->srLastUse = 0;
*/
static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
{
- if (object->myDev->nShortOpCaches > 0) {
+ if (object->myDev->param.nShortOpCaches > 0) {
yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
if (cache)
int i;
yaffs_Device *dev = in->myDev;
- if (dev->nShortOpCaches > 0) {
+ if (dev->param.nShortOpCaches > 0) {
/* Invalidate it. */
- for (i = 0; i < dev->nShortOpCaches; i++) {
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
if (dev->srCache[i].object == in)
dev->srCache[i].object = NULL;
}
}
}
-/*--------------------- Checkpointing --------------------*/
+/*--------------------- File read/write ------------------------
+ * Read and write have very similar structures.
+ * In general the read/write has three parts to it
+ * An incomplete chunk to start with (if the read/write is not chunk-aligned)
+ * Some complete chunks
+ * An incomplete chunk to end off with
+ *
+ * Curve-balls: the first chunk might also be the last chunk.
+ */
-static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
+int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
+ int nBytes)
{
- yaffs_CheckpointValidity cp;
- memset(&cp, 0, sizeof(cp));
+ int chunk;
+ __u32 start;
+ int nToCopy;
+ int n = nBytes;
+ int nDone = 0;
+ yaffs_ChunkCache *cache;
- cp.structType = sizeof(cp);
- cp.magic = YAFFS_MAGIC;
- cp.version = YAFFS_CHECKPOINT_VERSION;
- cp.head = (head) ? 1 : 0;
+ yaffs_Device *dev;
- return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
- 1 : 0;
-}
+ dev = in->myDev;
-static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
-{
- yaffs_CheckpointValidity cp;
- int ok;
+ while (n > 0) {
+ /* chunk = offset / dev->nDataBytesPerChunk + 1; */
+ /* start = offset % dev->nDataBytesPerChunk; */
+ yaffs_AddrToChunk(dev, offset, &chunk, &start);
+ chunk++;
- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+ /* OK now check for the curveball where the start and end are in
+ * the same chunk.
+ */
+ if ((start + n) < dev->nDataBytesPerChunk)
+ nToCopy = n;
+ else
+ nToCopy = dev->nDataBytesPerChunk - start;
- 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;
-}
+ cache = yaffs_FindChunkCache(in, chunk);
-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;
+ /* If the chunk is already in the cache or it is less than a whole chunk
+ * or we're using inband tags then use the cache (if there is caching)
+ * else bypass the cache.
+ */
+ if (cache || nToCopy != dev->nDataBytesPerChunk || dev->param.inbandTags) {
+ if (dev->param.nShortOpCaches > 0) {
- cp->nDeletedFiles = dev->nDeletedFiles;
- cp->nUnlinkedFiles = dev->nUnlinkedFiles;
- cp->nBackgroundDeletions = dev->nBackgroundDeletions;
- cp->sequenceNumber = dev->sequenceNumber;
- cp->oldestDirtySequence = dev->oldestDirtySequence;
+ /* If we can't find the data in the cache, then load it up. */
-}
+ if (!cache) {
+ cache = yaffs_GrabChunkCache(in->myDev);
+ cache->object = in;
+ cache->chunkId = chunk;
+ cache->dirty = 0;
+ cache->locked = 0;
+ yaffs_ReadChunkDataFromObject(in, chunk,
+ cache->
+ data);
+ cache->nBytes = 0;
+ }
-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;
+ yaffs_UseChunkCache(dev, cache, 0);
- dev->nDeletedFiles = cp->nDeletedFiles;
- dev->nUnlinkedFiles = cp->nUnlinkedFiles;
- dev->nBackgroundDeletions = cp->nBackgroundDeletions;
- dev->sequenceNumber = cp->sequenceNumber;
- dev->oldestDirtySequence = cp->oldestDirtySequence;
-}
+ cache->locked = 1;
-static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
-{
- yaffs_CheckpointDevice cp;
- __u32 nBytes;
- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
+ memcpy(buffer, &cache->data[start], nToCopy);
- int ok;
+ cache->locked = 0;
+ } else {
+ /* Read into the local buffer then copy..*/
- /* Write device runtime values*/
- yaffs_DeviceToCheckpointDevice(&cp, dev);
- cp.structType = sizeof(cp);
+ __u8 *localBuffer =
+ yaffs_GetTempBuffer(dev, __LINE__);
+ yaffs_ReadChunkDataFromObject(in, chunk,
+ localBuffer);
- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+ memcpy(buffer, &localBuffer[start], nToCopy);
- /* Write block info */
- if (ok) {
- nBytes = nBlocks * sizeof(yaffs_BlockInfo);
- ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
- }
- /* Write chunk bits */
- if (ok) {
- nBytes = nBlocks * dev->chunkBitmapStride;
- ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
- }
- return ok ? 1 : 0;
+ yaffs_ReleaseTempBuffer(dev, localBuffer,
+ __LINE__);
+ }
-}
+ } else {
-static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
-{
- yaffs_CheckpointDevice cp;
- __u32 nBytes;
- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
+ /* A full chunk. Read directly into the supplied buffer. */
+ yaffs_ReadChunkDataFromObject(in, chunk, buffer);
- int ok;
+ }
- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
- if (!ok)
- return 0;
+ n -= nToCopy;
+ offset += nToCopy;
+ buffer += nToCopy;
+ nDone += nToCopy;
- if (cp.structType != sizeof(cp))
- return 0;
+ }
+ return nDone;
+}
- yaffs_CheckpointDeviceToDevice(dev, &cp);
+int yaffs_DoWriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
+ int nBytes, int writeThrough)
+{
- nBytes = nBlocks * sizeof(yaffs_BlockInfo);
+ int chunk;
+ __u32 start;
+ int nToCopy;
+ int n = nBytes;
+ int nDone = 0;
+ int nToWriteBack;
+ int startOfWrite = offset;
+ int chunkWritten = 0;
+ __u32 nBytesRead;
+ __u32 chunkStart;
- ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
+ yaffs_Device *dev;
- if (!ok)
- return 0;
- nBytes = nBlocks * dev->chunkBitmapStride;
+ dev = in->myDev;
- ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
+ while (n > 0 && chunkWritten >= 0) {
+ yaffs_AddrToChunk(dev, offset, &chunk, &start);
- return ok ? 1 : 0;
-}
+ if (chunk * dev->nDataBytesPerChunk + start != offset ||
+ start >= dev->nDataBytesPerChunk) {
+ T(YAFFS_TRACE_ERROR, (
+ TSTR("AddrToChunk of offset %d gives chunk %d start %d"
+ TENDSTR),
+ (int)offset, chunk, start));
+ }
+ chunk++; /* File pos to chunk in file offset */
-static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
- yaffs_Object *obj)
-{
+ /* OK now check for the curveball where the start and end are in
+ * the same chunk.
+ */
- cp->objectId = obj->objectId;
- cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
- cp->hdrChunk = obj->hdrChunk;
- cp->variantType = obj->variantType;
- cp->deleted = obj->deleted;
- cp->softDeleted = obj->softDeleted;
- cp->unlinked = obj->unlinked;
- cp->fake = obj->fake;
- cp->renameAllowed = obj->renameAllowed;
- cp->unlinkAllowed = obj->unlinkAllowed;
- cp->serial = obj->serial;
- cp->nDataChunks = obj->nDataChunks;
+ if ((start + n) < dev->nDataBytesPerChunk) {
+ nToCopy = n;
- 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;
-}
+ /* Now folks, to calculate how many bytes to write back....
+ * If we're overwriting and not writing to then end of file then
+ * we need to write back as much as was there before.
+ */
-static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
-{
+ chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
- yaffs_Object *parent;
+ if (chunkStart > in->variant.fileVariant.fileSize)
+ nBytesRead = 0; /* Past end of file */
+ else
+ nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
- if (obj->variantType != cp->variantType) {
- T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
- TCONT("chunk %d does not match existing object type %d")
- TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
- obj->variantType));
- return 0;
- }
+ if (nBytesRead > dev->nDataBytesPerChunk)
+ nBytesRead = dev->nDataBytesPerChunk;
+
+ nToWriteBack =
+ (nBytesRead >
+ (start + n)) ? nBytesRead : (start + n);
- obj->objectId = cp->objectId;
+ if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
+ YBUG();
- 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;
+ } else {
+ nToCopy = dev->nDataBytesPerChunk - start;
+ nToWriteBack = dev->nDataBytesPerChunk;
}
- 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 (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 (obj->hdrChunk > 0)
- obj->lazyLoaded = 1;
- return 1;
-}
+ if (!cache
+ && yaffs_CheckSpaceForAllocation(dev, 1)) {
+ cache = yaffs_GrabChunkCache(dev);
+ cache->object = in;
+ cache->chunkId = chunk;
+ cache->dirty = 0;
+ cache->locked = 0;
+ yaffs_ReadChunkDataFromObject(in, chunk,
+ cache->data);
+ } else if (cache &&
+ !cache->dirty &&
+ !yaffs_CheckSpaceForAllocation(dev, 1)) {
+ /* Drop the cache if it was a read cache item and
+ * no space check has been made for it.
+ */
+ cache = NULL;
+ }
+ if (cache) {
+ yaffs_UseChunkCache(dev, cache, 1);
+ cache->locked = 1;
-static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
- __u32 level, int chunkOffset)
-{
- int i;
- yaffs_Device *dev = in->myDev;
- int ok = 1;
- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+ memcpy(&cache->data[start], buffer,
+ nToCopy);
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
+ cache->locked = 0;
+ cache->nBytes = nToWriteBack;
- if (tn) {
- if (level > 0) {
+ if (writeThrough) {
+ chunkWritten =
+ yaffs_WriteChunkDataToObject
+ (cache->object,
+ cache->chunkId,
+ cache->data, cache->nBytes,
+ 1);
+ cache->dirty = 0;
+ }
- for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
- if (tn->internal[i]) {
- ok = yaffs_CheckpointTnodeWorker(in,
- tn->internal[i],
- level - 1,
- (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
+ } else {
+ chunkWritten = -1; /* fail the write */
}
- }
- } 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);
- }
- }
+ } else {
+ /* An incomplete start or end chunk (or maybe both start and end chunk)
+ * Read into the local buffer then copy, then copy over and write back.
+ */
- return ok;
+ __u8 *localBuffer =
+ yaffs_GetTempBuffer(dev, __LINE__);
-}
+ yaffs_ReadChunkDataFromObject(in, chunk,
+ localBuffer);
-static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
-{
- __u32 endMarker = ~0;
- int ok = 1;
- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
- ok = yaffs_CheckpointTnodeWorker(obj,
- obj->variant.fileVariant.top,
- obj->variant.fileVariant.topLevel,
- 0);
- if (ok)
- ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
- sizeof(endMarker));
- }
- return ok ? 1 : 0;
-}
+ memcpy(&localBuffer[start], buffer, nToCopy);
-static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
-{
- __u32 baseChunk;
- int ok = 1;
- yaffs_Device *dev = obj->myDev;
- yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
- yaffs_Tnode *tn;
- int nread = 0;
- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+ chunkWritten =
+ yaffs_WriteChunkDataToObject(in, chunk,
+ localBuffer,
+ nToWriteBack,
+ 0);
+
+ yaffs_ReleaseTempBuffer(dev, localBuffer,
+ __LINE__);
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
+ }
- ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
+ } else {
+ /* A full chunk. Write directly from the supplied buffer. */
- while (ok && (~baseChunk)) {
- nread++;
- /* Read level 0 tnode */
- tn = yaffs_GetTnodeRaw(dev);
- if (tn)
- ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
- else
- ok = 0;
+ chunkWritten =
+ yaffs_WriteChunkDataToObject(in, chunk, buffer,
+ dev->nDataBytesPerChunk,
+ 0);
- if (tn && ok)
- ok = yaffs_AddOrFindLevel0Tnode(dev,
- fileStructPtr,
- baseChunk,
- tn) ? 1 : 0;
+ /* Since we've overwritten the cached data, we better invalidate it. */
+ yaffs_InvalidateChunkCache(in, chunk);
+ }
- if (ok)
- ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
+ if (chunkWritten >= 0) {
+ n -= nToCopy;
+ offset += nToCopy;
+ buffer += nToCopy;
+ nDone += nToCopy;
+ }
}
- T(YAFFS_TRACE_CHECKPOINT, (
- TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
- nread, baseChunk, ok));
+ /* Update file object */
+
+ if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
+ in->variant.fileVariant.fileSize = (startOfWrite + nDone);
- return ok ? 1 : 0;
-}
+ in->dirty = 1;
+ return nDone;
+}
-static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
+int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
+ int nBytes, int writeThrough)
{
- yaffs_Object *obj;
- yaffs_CheckpointObject cp;
- int i;
- int ok = 1;
- struct ylist_head *lh;
+ yaffs2_HandleHole(in,offset);
+ return yaffs_DoWriteDataToFile(in,buffer,offset,nBytes,writeThrough);
+}
- /* 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);
+/* ---------------------- File resizing stuff ------------------ */
+
+static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
+{
+
+ yaffs_Device *dev = in->myDev;
+ int oldFileSize = in->variant.fileVariant.fileSize;
- T(YAFFS_TRACE_CHECKPOINT, (
- TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
- cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, (unsigned) obj));
+ int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+ int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
+ dev->nDataBytesPerChunk;
+ int i;
+ int chunkId;
- if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
- ok = yaffs_WriteCheckpointTnodes(obj);
- }
+ /* Delete backwards so that we don't end up with holes if
+ * power is lost part-way through the operation.
+ */
+ for (i = lastDel; i >= startDel; i--) {
+ /* NB this could be optimised somewhat,
+ * eg. could retrieve the tags and write them without
+ * using yaffs_DeleteChunk
+ */
+
+ chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
+ if (chunkId > 0) {
+ if (chunkId <
+ (dev->internalStartBlock * dev->param.nChunksPerBlock)
+ || chunkId >=
+ ((dev->internalEndBlock +
+ 1) * dev->param.nChunksPerBlock)) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("Found daft chunkId %d for %d" TENDSTR),
+ chunkId, i));
+ } else {
+ in->nDataChunks--;
+ yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
}
}
}
- /* Dump end of list */
- memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
- cp.structType = sizeof(cp);
-
- if (ok)
- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
-
- return ok ? 1 : 0;
}
-static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
+
+void yaffs_ResizeDown( yaffs_Object *obj, loff_t newSize)
{
- yaffs_Object *obj;
- yaffs_CheckpointObject cp;
- int ok = 1;
- int done = 0;
- yaffs_Object *hardList = NULL;
-
- while (ok && !done) {
- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
- if (cp.structType != sizeof(cp)) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
- cp.structType, sizeof(cp), ok));
- ok = 0;
- }
+ int newFullChunks;
+ __u32 newSizeOfPartialChunk;
+ yaffs_Device *dev = obj->myDev;
- 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;
- }
- }
+ yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
- if (ok)
- yaffs_HardlinkFixup(dev, hardList);
+ yaffs_PruneResizedChunks(obj, newSize);
- return ok ? 1 : 0;
-}
+ if (newSizeOfPartialChunk != 0) {
+ int lastChunk = 1 + newFullChunks;
+ __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
-static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
-{
- __u32 checkpointSum;
- int ok;
+ /* 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);
- yaffs_GetCheckpointSum(dev, &checkpointSum);
+ yaffs_WriteChunkDataToObject(obj, lastChunk, localBuffer,
+ newSizeOfPartialChunk, 1);
- ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
+ yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
+ }
- if (!ok)
- return 0;
+ obj->variant.fileVariant.fileSize = newSize;
- return 1;
+ yaffs_PruneFileStructure(dev, &obj->variant.fileVariant);
}
-static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
+
+int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
{
- __u32 checkpointSum0;
- __u32 checkpointSum1;
- int ok;
+ yaffs_Device *dev = in->myDev;
+ int oldFileSize = in->variant.fileVariant.fileSize;
- yaffs_GetCheckpointSum(dev, &checkpointSum0);
+ yaffs_FlushFilesChunkCache(in);
+ yaffs_InvalidateWholeChunkCache(in);
- ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
+ yaffs_CheckGarbageCollection(dev,0);
- if (!ok)
- return 0;
+ if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
+ return YAFFS_FAIL;
- if (checkpointSum0 != checkpointSum1)
- return 0;
+ if (newSize == oldFileSize)
+ return YAFFS_OK;
+
+ if(newSize > oldFileSize){
+ yaffs2_HandleHole(in,newSize);
+ in->variant.fileVariant.fileSize = newSize;
+ } else {
+ /* newSize < oldFileSize */
+ yaffs_ResizeDown(in, newSize);
+ }
+
+ /* Write a new object header to reflect the resize.
+ * show we've shrunk the file, if need be
+ * Do this only if the file is not in the deleted directories
+ * and is not shadowed.
+ */
+ if (in->parent &&
+ !in->isShadowed &&
+ in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
+ in->parent->objectId != YAFFS_OBJECTID_DELETED)
+ yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0, NULL);
- return 1;
-}
+ return YAFFS_OK;
+}
-static int yaffs_WriteCheckpointData(yaffs_Device *dev)
+loff_t yaffs_GetFileSize(yaffs_Object *obj)
{
- int ok = 1;
+ YCHAR *alias = NULL;
+ obj = yaffs_GetEquivalentObject(obj);
- if (dev->skipCheckpointWrite || !dev->isYaffs2) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
- ok = 0;
+ switch (obj->variantType) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ return obj->variant.fileVariant.fileSize;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ alias = obj->variant.symLinkVariant.alias;
+ if(!alias)
+ return 0;
+ return yaffs_strnlen(alias,YAFFS_MAX_ALIAS_LENGTH);
+ default:
+ return 0;
}
+}
- 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);
+int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync)
+{
+ int retVal;
+ if (in->dirty) {
+ yaffs_FlushFilesChunkCache(in);
+ if(dataSync) /* Only sync data */
+ retVal=YAFFS_OK;
+ else {
+ if (updateTime) {
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_WinFileTimeNow(in->win_mtime);
+#else
+
+ in->yst_mtime = Y_CURRENT_TIME;
- if (!yaffs_CheckpointClose(dev))
- ok = 0;
+#endif
+ }
- if (ok)
- dev->isCheckpointed = 1;
- else
- dev->isCheckpointed = 0;
+ retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0, NULL) >=
+ 0) ? YAFFS_OK : YAFFS_FAIL;
+ }
+ } else {
+ retVal = YAFFS_OK;
+ }
+
+ return retVal;
- return dev->isCheckpointed;
}
-static int yaffs_ReadCheckpointData(yaffs_Device *dev)
+static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
{
- int ok = 1;
- if (dev->skipCheckpointRead || !dev->isYaffs2) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
- ok = 0;
- }
-
- if (ok)
- ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
+ /* First off, invalidate the file's data in the cache, without flushing. */
+ yaffs_InvalidateWholeChunkCache(in);
- 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 (in->myDev->param.isYaffs2 && (in->parent != in->myDev->deletedDir)) {
+ /* Move to the unlinked directory so we have a record that it was deleted. */
+ yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
- 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;
+ yaffs_RemoveObjectFromDirectory(in);
+ yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
+ in->hdrChunk = 0;
- return ok ? 1 : 0;
+ yaffs_FreeObject(in);
+ return YAFFS_OK;
}
-static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
+/* yaffs_DeleteFile deletes the whole file data
+ * and the inode associated with the file.
+ * It does not delete the links associated with the file.
+ */
+static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
{
- if (dev->isCheckpointed ||
- dev->blocksInCheckpoint > 0) {
- dev->isCheckpointed = 0;
- yaffs_CheckpointInvalidateStream(dev);
- if (dev->superBlock && dev->markSuperBlockDirty)
- dev->markSuperBlockDirty(dev->superBlock);
+
+ int retVal;
+ int immediateDeletion = 0;
+ yaffs_Device *dev = in->myDev;
+
+ if (!in->myInode)
+ 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 (dev->param.disableSoftDelete || dev->param.isYaffs2)
+ yaffs_ResizeFile(in, 0);
+ yaffs_SoftDeleteFile(in);
+ } else {
+ retVal =
+ yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
+ _Y("unlinked"), 0, 0);
}
-}
-int yaffs_CheckpointSave(yaffs_Device *dev)
+ return retVal;
+}
+
+int yaffs_DeleteFile(yaffs_Object *in)
{
+ int retVal = YAFFS_OK;
+ int deleted; /* Need to cache value on stack if in is freed */
+ yaffs_Device *dev = in->myDev;
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+ if (dev->param.disableSoftDelete || dev->param.isYaffs2)
+ yaffs_ResizeFile(in, 0);
- yaffs_VerifyObjects(dev);
- yaffs_VerifyBlocks(dev);
- yaffs_VerifyFreeChunks(dev);
+ if (in->nDataChunks > 0) {
+ /* Use soft deletion if there is data in the file.
+ * That won't be the case if it has been resized to zero.
+ */
+ if (!in->unlinked)
+ retVal = yaffs_UnlinkFileIfNeeded(in);
- if (!dev->isCheckpointed) {
- yaffs_InvalidateCheckpoint(dev);
- yaffs_WriteCheckpointData(dev);
- }
+ deleted = in->deleted;
- T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+ if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
+ in->deleted = 1;
+ deleted = 1;
+ in->myDev->nDeletedFiles++;
+ yaffs_SoftDeleteFile(in);
+ }
+ return deleted ? YAFFS_OK : YAFFS_FAIL;
+ } else {
+ /* The file has no data chunks so we toss it immediately */
+ yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
+ in->variant.fileVariant.top = NULL;
+ yaffs_DoGenericObjectDeletion(in);
- return dev->isCheckpointed;
+ return YAFFS_OK;
+ }
}
-int yaffs_CheckpointRestore(yaffs_Device *dev)
+static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj)
{
- int retval;
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+ return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) &&
+ !(ylist_empty(&obj->variant.directoryVariant.children));
+}
- retval = yaffs_ReadCheckpointData(dev);
+static int yaffs_DeleteDirectory(yaffs_Object *obj)
+{
+ /* First check that the directory is empty. */
+ if (yaffs_IsNonEmptyDirectory(obj))
+ return YAFFS_FAIL;
- if (dev->isCheckpointed) {
- yaffs_VerifyObjects(dev);
- yaffs_VerifyBlocks(dev);
- yaffs_VerifyFreeChunks(dev);
- }
+ return yaffs_DoGenericObjectDeletion(obj);
+}
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+static int yaffs_DeleteSymLink(yaffs_Object *in)
+{
+ if(in->variant.symLinkVariant.alias)
+ YFREE(in->variant.symLinkVariant.alias);
+ in->variant.symLinkVariant.alias=NULL;
- return retval;
+ return yaffs_DoGenericObjectDeletion(in);
}
-/*--------------------- File read/write ------------------------
- * Read and write have very similar structures.
- * In general the read/write has three parts to it
- * An incomplete chunk to start with (if the read/write is not chunk-aligned)
- * Some complete chunks
- * An incomplete chunk to end off with
- *
- * Curve-balls: the first chunk might also be the last chunk.
- */
+static int yaffs_DeleteHardLink(yaffs_Object *in)
+{
+ /* remove this hardlink from the list assocaited with the equivalent
+ * object
+ */
+ ylist_del_init(&in->hardLinks);
+ return yaffs_DoGenericObjectDeletion(in);
+}
-int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
- int nBytes)
+int yaffs_DeleteObject(yaffs_Object *obj)
{
+int retVal = -1;
+ switch (obj->variantType) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ retVal = yaffs_DeleteFile(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ if(!ylist_empty(&obj->variant.directoryVariant.dirty)){
+ T(YAFFS_TRACE_BACKGROUND, (TSTR("Remove object %d from dirty directories" TENDSTR),obj->objectId));
+ ylist_del_init(&obj->variant.directoryVariant.dirty);
+ }
+ return yaffs_DeleteDirectory(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ retVal = yaffs_DeleteSymLink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ retVal = yaffs_DeleteHardLink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ retVal = yaffs_DoGenericObjectDeletion(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ retVal = 0;
+ break; /* should not happen. */
+ }
- int chunk;
- __u32 start;
- int nToCopy;
- int n = nBytes;
- int nDone = 0;
- yaffs_ChunkCache *cache;
+ return retVal;
+}
- yaffs_Device *dev;
+static int yaffs_UnlinkWorker(yaffs_Object *obj)
+{
- dev = in->myDev;
+ int immediateDeletion = 0;
- while (n > 0) {
- /* chunk = offset / dev->nDataBytesPerChunk + 1; */
- /* start = offset % dev->nDataBytesPerChunk; */
- yaffs_AddrToChunk(dev, offset, &chunk, &start);
- chunk++;
+ if (!obj->myInode)
+ immediateDeletion = 1;
- /* OK now check for the curveball where the start and end are in
- * the same chunk.
+ if(obj)
+ yaffs_UpdateParent(obj->parent);
+
+ if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
+ return yaffs_DeleteHardLink(obj);
+ } else if (!ylist_empty(&obj->hardLinks)) {
+ /* Curve ball: We're unlinking an object that has a hardlink.
+ *
+ * This problem arises because we are not strictly following
+ * The Linux link/inode model.
+ *
+ * We can't really delete the object.
+ * Instead, we do the following:
+ * - Select a hardlink.
+ * - Unhook it from the hard links
+ * - Move it from its parent directory (so that the rename can work)
+ * - Rename the object to the hardlink's name.
+ * - Delete the hardlink
*/
- if ((start + n) < dev->nDataBytesPerChunk)
- nToCopy = n;
- else
- nToCopy = dev->nDataBytesPerChunk - start;
- cache = yaffs_FindChunkCache(in, chunk);
+ yaffs_Object *hl;
+ yaffs_Object *parent;
+ int retVal;
+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
- /* If the chunk is already in the cache or it is less than a whole chunk
- * or we're using inband tags then use the cache (if there is caching)
- * else bypass the cache.
- */
- if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
- if (dev->nShortOpCaches > 0) {
+ hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
- /* If we can't find the data in the cache, then load it up. */
+ yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
+ parent = hl->parent;
- if (!cache) {
- cache = yaffs_GrabChunkCache(in->myDev);
- cache->object = in;
- cache->chunkId = chunk;
- cache->dirty = 0;
- cache->locked = 0;
- yaffs_ReadChunkDataFromObject(in, chunk,
- cache->
- data);
- cache->nBytes = 0;
- }
-
- yaffs_UseChunkCache(dev, cache, 0);
-
- cache->locked = 1;
-
-
- memcpy(buffer, &cache->data[start], nToCopy);
-
- cache->locked = 0;
- } else {
- /* Read into the local buffer then copy..*/
-
- __u8 *localBuffer =
- yaffs_GetTempBuffer(dev, __LINE__);
- yaffs_ReadChunkDataFromObject(in, chunk,
- localBuffer);
-
- memcpy(buffer, &localBuffer[start], nToCopy);
-
-
- yaffs_ReleaseTempBuffer(dev, localBuffer,
- __LINE__);
- }
-
- } else {
-
- /* A full chunk. Read directly into the supplied buffer. */
- yaffs_ReadChunkDataFromObject(in, chunk, buffer);
-
- }
-
- n -= nToCopy;
- offset += nToCopy;
- buffer += nToCopy;
- nDone += nToCopy;
-
- }
-
- return nDone;
-}
-
-int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
- int nBytes, int writeThrough)
-{
-
- int chunk;
- __u32 start;
- int nToCopy;
- int n = nBytes;
- int nDone = 0;
- int nToWriteBack;
- int startOfWrite = offset;
- int chunkWritten = 0;
- __u32 nBytesRead;
- __u32 chunkStart;
-
- yaffs_Device *dev;
-
- dev = in->myDev;
-
- while (n > 0 && chunkWritten >= 0) {
- /* chunk = offset / dev->nDataBytesPerChunk + 1; */
- /* start = offset % dev->nDataBytesPerChunk; */
- yaffs_AddrToChunk(dev, offset, &chunk, &start);
-
- if (chunk * dev->nDataBytesPerChunk + start != offset ||
- start >= dev->nDataBytesPerChunk) {
- T(YAFFS_TRACE_ERROR, (
- TSTR("AddrToChunk of offset %d gives chunk %d start %d"
- TENDSTR),
- (int)offset, chunk, start));
- }
- chunk++;
-
- /* OK now check for the curveball where the start and end are in
- * the same chunk.
- */
-
- if ((start + n) < dev->nDataBytesPerChunk) {
- nToCopy = n;
-
- /* Now folks, to calculate how many bytes to write back....
- * If we're overwriting and not writing to then end of file then
- * we need to write back as much as was there before.
- */
-
- chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
-
- if (chunkStart > in->variant.fileVariant.fileSize)
- nBytesRead = 0; /* Past end of file */
- else
- nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
-
- if (nBytesRead > dev->nDataBytesPerChunk)
- nBytesRead = dev->nDataBytesPerChunk;
-
- nToWriteBack =
- (nBytesRead >
- (start + n)) ? nBytesRead : (start + n);
-
- if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
- YBUG();
-
- } else {
- nToCopy = dev->nDataBytesPerChunk - start;
- nToWriteBack = dev->nDataBytesPerChunk;
- }
-
- if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
- /* An incomplete start or end chunk (or maybe both start and end chunk),
- * or we're using inband tags, so we want to use the cache buffers.
- */
- if (dev->nShortOpCaches > 0) {
- yaffs_ChunkCache *cache;
- /* If we can't find the data in the cache, then load the cache */
- cache = yaffs_FindChunkCache(in, chunk);
-
- if (!cache
- && yaffs_CheckSpaceForAllocation(in->
- myDev)) {
- cache = yaffs_GrabChunkCache(in->myDev);
- cache->object = in;
- cache->chunkId = chunk;
- cache->dirty = 0;
- cache->locked = 0;
- yaffs_ReadChunkDataFromObject(in, chunk,
- cache->
- data);
- } else if (cache &&
- !cache->dirty &&
- !yaffs_CheckSpaceForAllocation(in->myDev)) {
- /* Drop the cache if it was a read cache item and
- * no space check has been made for it.
- */
- cache = NULL;
- }
-
- if (cache) {
- yaffs_UseChunkCache(dev, cache, 1);
- cache->locked = 1;
-
-
- memcpy(&cache->data[start], buffer,
- nToCopy);
-
-
- cache->locked = 0;
- cache->nBytes = nToWriteBack;
-
- if (writeThrough) {
- chunkWritten =
- yaffs_WriteChunkDataToObject
- (cache->object,
- cache->chunkId,
- cache->data, cache->nBytes,
- 1);
- cache->dirty = 0;
- }
-
- } else {
- chunkWritten = -1; /* fail the write */
- }
- } else {
- /* An incomplete start or end chunk (or maybe both start and end chunk)
- * Read into the local buffer then copy, then copy over and write back.
- */
-
- __u8 *localBuffer =
- yaffs_GetTempBuffer(dev, __LINE__);
-
- yaffs_ReadChunkDataFromObject(in, chunk,
- localBuffer);
-
-
-
- memcpy(&localBuffer[start], buffer, nToCopy);
-
- chunkWritten =
- yaffs_WriteChunkDataToObject(in, chunk,
- localBuffer,
- nToWriteBack,
- 0);
-
- yaffs_ReleaseTempBuffer(dev, localBuffer,
- __LINE__);
-
- }
-
- } else {
- /* A full chunk. Write directly from the supplied buffer. */
-
-
-
- chunkWritten =
- yaffs_WriteChunkDataToObject(in, chunk, buffer,
- dev->nDataBytesPerChunk,
- 0);
-
- /* Since we've overwritten the cached data, we better invalidate it. */
- yaffs_InvalidateChunkCache(in, chunk);
- }
-
- if (chunkWritten >= 0) {
- n -= nToCopy;
- offset += nToCopy;
- buffer += nToCopy;
- nDone += nToCopy;
- }
-
- }
-
- /* Update file object */
-
- if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
- in->variant.fileVariant.fileSize = (startOfWrite + nDone);
-
- in->dirty = 1;
-
- return nDone;
-}
-
-
-/* ---------------------- File resizing stuff ------------------ */
-
-static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
-{
-
- yaffs_Device *dev = in->myDev;
- int oldFileSize = in->variant.fileVariant.fileSize;
-
- int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
-
- int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
- dev->nDataBytesPerChunk;
- int i;
- int chunkId;
-
- /* Delete backwards so that we don't end up with holes if
- * power is lost part-way through the operation.
- */
- for (i = lastDel; i >= startDel; i--) {
- /* NB this could be optimised somewhat,
- * eg. could retrieve the tags and write them without
- * using yaffs_DeleteChunk
- */
-
- chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
- if (chunkId > 0) {
- if (chunkId <
- (dev->internalStartBlock * dev->nChunksPerBlock)
- || chunkId >=
- ((dev->internalEndBlock +
- 1) * dev->nChunksPerBlock)) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("Found daft chunkId %d for %d" TENDSTR),
- chunkId, i));
- } else {
- in->nDataChunks--;
- yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
- }
- }
- }
-
-}
-
-int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
-{
-
- int oldFileSize = in->variant.fileVariant.fileSize;
- __u32 newSizeOfPartialChunk;
- int newFullChunks;
-
- yaffs_Device *dev = in->myDev;
-
- yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
-
- yaffs_FlushFilesChunkCache(in);
- yaffs_InvalidateWholeChunkCache(in);
-
- yaffs_CheckGarbageCollection(dev);
-
- if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
- return YAFFS_FAIL;
-
- if (newSize == oldFileSize)
- return YAFFS_OK;
-
- if (newSize < oldFileSize) {
-
- yaffs_PruneResizedChunks(in, newSize);
-
- if (newSizeOfPartialChunk != 0) {
- int lastChunk = 1 + newFullChunks;
-
- __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
-
- /* Got to read and rewrite the last chunk with its new size and zero pad */
- yaffs_ReadChunkDataFromObject(in, lastChunk,
- localBuffer);
-
- memset(localBuffer + newSizeOfPartialChunk, 0,
- dev->nDataBytesPerChunk - newSizeOfPartialChunk);
-
- yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
- newSizeOfPartialChunk, 1);
-
- yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
- }
-
- in->variant.fileVariant.fileSize = newSize;
-
- yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
- } else {
- /* newsSize > oldFileSize */
- in->variant.fileVariant.fileSize = newSize;
- }
-
-
- /* Write a new object header to reflect the resize.
- * show we've shrunk the file, if need be
- * Do this only if the file is not in the deleted directories
- * and is not shadowed.
- */
- if (in->parent &&
- !in->isShadowed &&
- in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
- in->parent->objectId != YAFFS_OBJECTID_DELETED)
- yaffs_UpdateObjectHeader(in, NULL, 0,
- (newSize < oldFileSize) ? 1 : 0, 0);
-
- return YAFFS_OK;
-}
-
-loff_t yaffs_GetFileSize(yaffs_Object *obj)
-{
- YCHAR *alias = NULL;
- obj = yaffs_GetEquivalentObject(obj);
-
- switch (obj->variantType) {
- case YAFFS_OBJECT_TYPE_FILE:
- return obj->variant.fileVariant.fileSize;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- alias = obj->variant.symLinkVariant.alias;
- if(!alias)
- return 0;
- return yaffs_strlen(alias);
- default:
- return 0;
- }
-}
-
-
-
-int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync)
-{
- int retVal;
- if (in->dirty) {
- yaffs_FlushFilesChunkCache(in);
- if(dataSync) /* Only sync data */
- retVal=YAFFS_OK;
- else {
- if (updateTime) {
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_WinFileTimeNow(in->win_mtime);
-#else
-
- in->yst_mtime = Y_CURRENT_TIME;
-
-#endif
- }
-
- retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
- 0) ? YAFFS_OK : YAFFS_FAIL;
- }
- } else {
- retVal = YAFFS_OK;
- }
-
- return retVal;
-
-}
-
-static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
-{
-
- /* First off, invalidate the file's data in the cache, without flushing. */
- yaffs_InvalidateWholeChunkCache(in);
-
- if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) {
- /* Move to the unlinked directory so we have a record that it was deleted. */
- yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
-
- }
-
- yaffs_RemoveObjectFromDirectory(in);
- yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
- in->hdrChunk = 0;
-
- yaffs_FreeObject(in);
- return YAFFS_OK;
-
-}
-
-/* yaffs_DeleteFile deletes the whole file data
- * and the inode associated with the file.
- * It does not delete the links associated with the file.
- */
-static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
-{
-
- int retVal;
- int immediateDeletion = 0;
-
-#ifdef __KERNEL__
- if (!in->myInode)
- immediateDeletion = 1;
-#else
- if (in->inUse <= 0)
- immediateDeletion = 1;
-#endif
-
- if (immediateDeletion) {
- retVal =
- yaffs_ChangeObjectName(in, in->myDev->deletedDir,
- _Y("deleted"), 0, 0);
- T(YAFFS_TRACE_TRACING,
- (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
- in->objectId));
- in->deleted = 1;
- in->myDev->nDeletedFiles++;
- if (1 || in->myDev->isYaffs2)
- yaffs_ResizeFile(in, 0);
- yaffs_SoftDeleteFile(in);
- } else {
- retVal =
- yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
- _Y("unlinked"), 0, 0);
- }
-
-
- return retVal;
-}
-
-int yaffs_DeleteFile(yaffs_Object *in)
-{
- int retVal = YAFFS_OK;
- int deleted = in->deleted;
-
- yaffs_ResizeFile(in, 0);
-
- if (in->nDataChunks > 0) {
- /* Use soft deletion if there is data in the file.
- * That won't be the case if it has been resized to zero.
- */
- if (!in->unlinked)
- retVal = yaffs_UnlinkFileIfNeeded(in);
-
- if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
- in->deleted = 1;
- deleted = 1;
- in->myDev->nDeletedFiles++;
- yaffs_SoftDeleteFile(in);
- }
- return deleted ? YAFFS_OK : YAFFS_FAIL;
- } else {
- /* The file has no data chunks so we toss it immediately */
- yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
- in->variant.fileVariant.top = NULL;
- yaffs_DoGenericObjectDeletion(in);
-
- return YAFFS_OK;
- }
-}
-
-static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj)
-{
- return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) &&
- !(ylist_empty(&obj->variant.directoryVariant.children));
-}
-
-static int yaffs_DeleteDirectory(yaffs_Object *obj)
-{
- /* First check that the directory is empty. */
- if (yaffs_IsNonEmptyDirectory(obj))
- return YAFFS_FAIL;
-
- return yaffs_DoGenericObjectDeletion(obj);
-}
-
-static int yaffs_DeleteSymLink(yaffs_Object *in)
-{
- 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)
-{
- /* remove this hardlink from the list assocaited with the equivalent
- * object
- */
- ylist_del_init(&in->hardLinks);
- return yaffs_DoGenericObjectDeletion(in);
-}
-
-int yaffs_DeleteObject(yaffs_Object *obj)
-{
-int retVal = -1;
- switch (obj->variantType) {
- case YAFFS_OBJECT_TYPE_FILE:
- retVal = yaffs_DeleteFile(obj);
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- return yaffs_DeleteDirectory(obj);
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- retVal = yaffs_DeleteSymLink(obj);
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- retVal = yaffs_DeleteHardLink(obj);
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- retVal = yaffs_DoGenericObjectDeletion(obj);
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- retVal = 0;
- break; /* should not happen. */
- }
-
- return retVal;
-}
-
-static int yaffs_UnlinkWorker(yaffs_Object *obj)
-{
-
- int immediateDeletion = 0;
-
-#ifdef __KERNEL__
- if (!obj->myInode)
- immediateDeletion = 1;
-#else
- if (obj->inUse <= 0)
- immediateDeletion = 1;
-#endif
-
- if(obj)
- yaffs_UpdateParent(obj->parent);
-
- if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
- return yaffs_DeleteHardLink(obj);
- } else if (!ylist_empty(&obj->hardLinks)) {
- /* Curve ball: We're unlinking an object that has a hardlink.
- *
- * This problem arises because we are not strictly following
- * The Linux link/inode model.
- *
- * We can't really delete the object.
- * Instead, we do the following:
- * - Select a hardlink.
- * - Unhook it from the hard links
- * - Unhook it from its parent directory (so that the rename can work)
- * - Rename the object to the hardlink's name.
- * - Delete the hardlink
- */
-
- yaffs_Object *hl;
- int retVal;
- YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
-
- hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
-
- ylist_del_init(&hl->hardLinks);
- ylist_del_init(&hl->siblings);
-
- yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
-
- retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
-
- if (retVal == YAFFS_OK)
- retVal = yaffs_DoGenericObjectDeletion(hl);
-
- return retVal;
-
- } else if (immediateDeletion) {
- switch (obj->variantType) {
- case YAFFS_OBJECT_TYPE_FILE:
- return yaffs_DeleteFile(obj);
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- return yaffs_DeleteDirectory(obj);
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- return yaffs_DeleteSymLink(obj);
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- return yaffs_DoGenericObjectDeletion(obj);
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- default:
- return YAFFS_FAIL;
- }
- } else 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)
-{
-
- if (obj && obj->unlinkAllowed)
- return yaffs_UnlinkWorker(obj);
-
- return YAFFS_FAIL;
-
-}
-int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
-{
- yaffs_Object *obj;
-
- obj = yaffs_FindObjectByName(dir, name);
- return yaffs_UnlinkObject(obj);
-}
-
-/*----------------------- Initialisation Scanning ---------------------- */
-
-static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
- int backwardScanning)
-{
- yaffs_Object *obj;
-
- if (!backwardScanning) {
- /* Handle YAFFS1 forward scanning case
- * For YAFFS1 we always do the deletion
- */
-
- } else {
- /* Handle YAFFS2 case (backward scanning)
- * If the shadowed object exists then ignore.
- */
- 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.
- * We put it in unlinked dir to be cleaned up after the scanning
- */
- obj =
- yaffs_FindOrCreateObjectByNumber(dev, objId,
- YAFFS_OBJECT_TYPE_FILE);
- if (!obj)
- return;
- obj->isShadowed = 1;
- yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
- obj->variant.fileVariant.shrinkSize = 0;
- obj->valid = 1; /* So that we don't read any other info for this file */
-
-}
-
-typedef struct {
- int seq;
- int block;
-} yaffs_BlockIndex;
-
-
-static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
-{
- yaffs_Object *hl;
- yaffs_Object *in;
-
- while (hardList) {
- hl = hardList;
- hardList = (yaffs_Object *) (hardList->hardLinks.next);
-
- in = yaffs_FindObjectByNumber(dev,
- hl->variant.hardLinkVariant.
- equivalentObjectId);
-
- if (in) {
- /* Add the hardlink pointers */
- hl->variant.hardLinkVariant.equivalentObject = in;
- ylist_add(&hl->hardLinks, &in->hardLinks);
- } else {
- /* Todo Need to report/handle this better.
- * Got a problem... hardlink to a non-existant object
- */
- hl->variant.hardLinkVariant.equivalentObject = NULL;
- YINIT_LIST_HEAD(&hl->hardLinks);
-
- }
- }
-}
-
-
-
-
-
-static int ybicmp(const void *a, const void *b)
-{
- register int aseq = ((yaffs_BlockIndex *)a)->seq;
- register int bseq = ((yaffs_BlockIndex *)b)->seq;
- register int ablock = ((yaffs_BlockIndex *)a)->block;
- register int bblock = ((yaffs_BlockIndex *)b)->block;
- if (aseq == bseq)
- return ablock - bblock;
- else
- return aseq - bseq;
-}
-
-
-struct yaffs_ShadowFixerStruct {
- int objectId;
- int shadowedId;
- struct yaffs_ShadowFixerStruct *next;
-};
-
-
-static 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 result;
-
- int chunk;
- int c;
- int deleted;
- yaffs_BlockState state;
- yaffs_Object *hardList = NULL;
- yaffs_BlockInfo *bi;
- __u32 sequenceNumber;
- yaffs_ObjectHeader *oh;
- yaffs_Object *in;
- yaffs_Object *parent;
-
- int alloc_failed = 0;
-
- struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
-
-
- __u8 *chunkData;
-
-
-
- T(YAFFS_TRACE_SCAN,
- (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
- dev->internalStartBlock, dev->internalEndBlock));
-
- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
-
- dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
-
- /* Scan all the blocks to determine their state */
- for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
- bi = yaffs_GetBlockInfo(dev, blk);
- yaffs_ClearChunkBits(dev, blk);
- bi->pagesInUse = 0;
- bi->softDeletions = 0;
-
- yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
-
- bi->blockState = state;
- bi->sequenceNumber = sequenceNumber;
-
- if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
- bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
-
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
- state, sequenceNumber));
-
- if (state == YAFFS_BLOCK_STATE_DEAD) {
- T(YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("block %d is bad" TENDSTR), blk));
- } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block empty " TENDSTR)));
- dev->nErasedBlocks++;
- dev->nFreeChunks += dev->nChunksPerBlock;
- }
- }
-
- startIterator = dev->internalStartBlock;
- endIterator = dev->internalEndBlock;
-
- /* For each block.... */
- for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
- blockIterator++) {
-
- YYIELD();
-
- YYIELD();
-
- blk = blockIterator;
-
- bi = yaffs_GetBlockInfo(dev, blk);
- state = bi->blockState;
-
- deleted = 0;
-
- /* For each chunk in each block that needs scanning....*/
- for (c = 0; !alloc_failed && c < dev->nChunksPerBlock &&
- state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
- /* Read the tags and decide what to do */
- chunk = blk * dev->nChunksPerBlock + c;
-
- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
- &tags);
-
- /* Let's have a good look at this chunk... */
-
- if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
- /* YAFFS1 only...
- * A deleted chunk
- */
- deleted++;
- dev->nFreeChunks++;
- /*T((" %d %d deleted\n",blk,c)); */
- } else if (!tags.chunkUsed) {
- /* An unassigned chunk in the block
- * This means that either the block is empty or
- * this is the one being allocated from
- */
-
- if (c == 0) {
- /* We're looking at the first chunk in the block so the block is unused */
- state = YAFFS_BLOCK_STATE_EMPTY;
- dev->nErasedBlocks++;
- } else {
- /* this is the block being allocated from */
- T(YAFFS_TRACE_SCAN,
- (TSTR
- (" Allocating from %d %d" TENDSTR),
- blk, c));
- state = YAFFS_BLOCK_STATE_ALLOCATING;
- dev->allocationBlock = blk;
- dev->allocationPage = c;
- dev->allocationBlockFinder = blk;
- /* Set it to here to encourage the allocator to go forth from here. */
-
- }
-
- dev->nFreeChunks += (dev->nChunksPerBlock - c);
- } else if (tags.chunkId > 0) {
- /* chunkId > 0 so it is a data chunk... */
- unsigned int endpos;
-
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
-
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.
- objectId,
- YAFFS_OBJECT_TYPE_FILE);
- /* PutChunkIntoFile checks for a clash (two data chunks with
- * the same chunkId).
- */
-
- if (!in)
- alloc_failed = 1;
-
- if (in) {
- if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
- alloc_failed = 1;
- }
-
- endpos =
- (tags.chunkId - 1) * dev->nDataBytesPerChunk +
- tags.byteCount;
- if (in &&
- in->variantType == YAFFS_OBJECT_TYPE_FILE
- && in->variant.fileVariant.scannedFileSize <
- endpos) {
- in->variant.fileVariant.
- scannedFileSize = endpos;
- if (!dev->useHeaderFileSize) {
- in->variant.fileVariant.
- fileSize =
- in->variant.fileVariant.
- scannedFileSize;
- }
-
- }
- /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
- } else {
- /* chunkId == 0, so it is an ObjectHeader.
- * Thus, we read in the object header and make the object
- */
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
-
- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
- chunkData,
- NULL);
-
- oh = (yaffs_ObjectHeader *) chunkData;
-
- in = yaffs_FindObjectByNumber(dev,
- tags.objectId);
- if (in && in->variantType != oh->type) {
- /* This should not happen, but somehow
- * Wev'e ended up with an objectId that has been reused but not yet
- * deleted, and worse still it has changed type. Delete the old object.
- */
-
- yaffs_DeleteObject(in);
-
- in = 0;
- }
-
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.
- objectId,
- oh->type);
-
- if (!in)
- alloc_failed = 1;
-
- if (in && oh->shadowsObject > 0) {
-
- struct yaffs_ShadowFixerStruct *fixer;
- fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
- if (fixer) {
- fixer->next = shadowFixerList;
- shadowFixerList = fixer;
- fixer->objectId = tags.objectId;
- fixer->shadowedId = oh->shadowsObject;
- }
-
- }
-
- if (in && in->valid) {
- /* We have already filled this one. We have a duplicate and need to resolve it. */
-
- unsigned existingSerial = in->serial;
- unsigned newSerial = tags.serialNumber;
-
- if (((existingSerial + 1) & 3) == newSerial) {
- /* Use new one - destroy the exisiting one */
- yaffs_DeleteChunk(dev,
- in->hdrChunk,
- 1, __LINE__);
- in->valid = 0;
- } else {
- /* Use existing - destroy this one. */
- yaffs_DeleteChunk(dev, chunk, 1,
- __LINE__);
- }
- }
-
- if (in && !in->valid &&
- (tags.objectId == YAFFS_OBJECTID_ROOT ||
- tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
- /* We only load some info, don't fiddle with directory structure */
- in->valid = 1;
- in->variantType = oh->type;
-
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
-#endif
- in->hdrChunk = chunk;
- in->serial = tags.serialNumber;
-
- } else if (in && !in->valid) {
- /* we need to load this info */
-
- in->valid = 1;
- in->variantType = oh->type;
-
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
-#endif
- in->hdrChunk = chunk;
- in->serial = tags.serialNumber;
-
- yaffs_SetObjectName(in, oh->name);
- in->dirty = 0;
-
- /* directory stuff...
- * hook up to parent
- */
-
- parent =
- yaffs_FindOrCreateObjectByNumber
- (dev, oh->parentObjectId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
- if (!parent)
- alloc_failed = 1;
- if (parent && parent->variantType ==
- YAFFS_OBJECT_TYPE_UNKNOWN) {
- /* Set up as a directory */
- parent->variantType =
- YAFFS_OBJECT_TYPE_DIRECTORY;
- YINIT_LIST_HEAD(&parent->variant.
- directoryVariant.
- children);
- } else if (!parent || parent->variantType !=
- YAFFS_OBJECT_TYPE_DIRECTORY) {
- /* Hoosterman, another problem....
- * We're trying to use a non-directory as a directory
- */
-
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
- TENDSTR)));
- parent = dev->lostNFoundDir;
- }
-
- yaffs_AddObjectToDirectory(parent, in);
-
- if (0 && (parent == dev->deletedDir ||
- parent == dev->unlinkedDir)) {
- in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
- dev->nDeletedFiles++;
- }
- /* Note re hardlinks.
- * Since we might scan a hardlink before its equivalent object is scanned
- * we put them all in a list.
- * After scanning is complete, we should have all the objects, so we run through this
- * list and fix up all the chains.
- */
-
- switch (in->variantType) {
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* Todo got a problem */
- break;
- case YAFFS_OBJECT_TYPE_FILE:
- if (dev->useHeaderFileSize)
-
- in->variant.fileVariant.
- fileSize =
- oh->fileSize;
-
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- in->variant.hardLinkVariant.
- equivalentObjectId =
- oh->equivalentObjectId;
- in->hardLinks.next =
- (struct ylist_head *)
- hardList;
- hardList = in;
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- in->variant.symLinkVariant.alias =
- yaffs_CloneString(oh->alias);
- if (!in->variant.symLinkVariant.alias)
- alloc_failed = 1;
- break;
- }
-
-/*
- if (parent == dev->deletedDir) {
- yaffs_DestroyObject(in);
- bi->hasShrinkHeader = 1;
- }
-*/
- }
- }
- }
-
- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- /* If we got this far while scanning, then the block is fully allocated.*/
- state = YAFFS_BLOCK_STATE_FULL;
- }
-
- bi->blockState = state;
-
- /* Now let's see if it was dirty */
- if (bi->pagesInUse == 0 &&
- !bi->hasShrinkHeader &&
- bi->blockState == YAFFS_BLOCK_STATE_FULL) {
- yaffs_BlockBecameDirty(dev, blk);
- }
-
- }
-
-
- /* Ok, we've done all the scanning.
- * Fix up the hard link chains.
- * We should now have scanned all the objects, now it's time to add these
- * hardlinks.
- */
-
- yaffs_HardlinkFixup(dev, hardList);
-
- /* Fix up any shadowed objects */
- {
- struct yaffs_ShadowFixerStruct *fixer;
- yaffs_Object *obj;
-
- while (shadowFixerList) {
- fixer = shadowFixerList;
- shadowFixerList = fixer->next;
- /* Complete the rename transaction by deleting the shadowed object
- * then setting the object header to unshadowed.
- */
- obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
- if (obj)
- yaffs_DeleteObject(obj);
-
- obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
-
- if (obj)
- yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
-
- 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 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
+ ylist_del_init(&hl->hardLinks);
- if (in->lazyLoaded && in->hdrChunk > 0) {
- in->lazyLoaded = 0;
- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+ yaffs_AddObjectToDirectory(obj->myDev->unlinkedDir, hl);
- result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
- oh = (yaffs_ObjectHeader *) chunkData;
+ retVal = yaffs_ChangeObjectName(obj,parent, name, 0, 0);
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
+ if (retVal == YAFFS_OK)
+ retVal = yaffs_DoGenericObjectDeletion(hl);
-#endif
- yaffs_SetObjectName(in, oh->name);
+ return retVal;
- 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 */
+ } else if (immediateDeletion) {
+ switch (obj->variantType) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ return yaffs_DeleteFile(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ ylist_del_init(&obj->variant.directoryVariant.dirty);
+ return yaffs_DeleteDirectory(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ return yaffs_DeleteSymLink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ return yaffs_DoGenericObjectDeletion(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ default:
+ return YAFFS_FAIL;
}
-
- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
- }
+ } else if(yaffs_IsNonEmptyDirectory(obj))
+ return YAFFS_FAIL;
+ else
+ return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
+ _Y("unlinked"), 0, 0);
}
-static int yaffs_ScanBackwards(yaffs_Device *dev)
-{
- yaffs_ExtendedTags tags;
- int blk;
- int blockIterator;
- int startIterator;
- int endIterator;
- int nBlocksToScan = 0;
-
- int chunk;
- int result;
- int c;
- int deleted;
- yaffs_BlockState state;
- yaffs_Object *hardList = NULL;
- yaffs_BlockInfo *bi;
- __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;
+static int yaffs_UnlinkObject(yaffs_Object *obj)
+{
- yaffs_BlockIndex *blockIndex = NULL;
- int altBlockIndex = 0;
+ if (obj && obj->unlinkAllowed)
+ return yaffs_UnlinkWorker(obj);
- if (!dev->isYaffs2) {
- T(YAFFS_TRACE_SCAN,
- (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
- return YAFFS_FAIL;
- }
+ return YAFFS_FAIL;
- T(YAFFS_TRACE_SCAN,
- (TSTR
- ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
- TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
+}
+int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
+{
+ yaffs_Object *obj;
+ obj = yaffs_FindObjectByName(dir, name);
+ return yaffs_UnlinkObject(obj);
+}
- dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
+/*----------------------- Initialisation Scanning ---------------------- */
- blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
+void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
+ int backwardScanning)
+{
+ yaffs_Object *obj;
- if (!blockIndex) {
- blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
- altBlockIndex = 1;
- }
+ if (!backwardScanning) {
+ /* Handle YAFFS1 forward scanning case
+ * For YAFFS1 we always do the deletion
+ */
- if (!blockIndex) {
- T(YAFFS_TRACE_SCAN,
- (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
- return YAFFS_FAIL;
+ } else {
+ /* Handle YAFFS2 case (backward scanning)
+ * If the shadowed object exists then ignore.
+ */
+ obj = yaffs_FindObjectByNumber(dev, objId);
+ if(obj)
+ return;
}
- dev->blocksInCheckpoint = 0;
-
- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
-
- /* Scan all the blocks to determine their state */
- for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
- bi = yaffs_GetBlockInfo(dev, blk);
- yaffs_ClearChunkBits(dev, blk);
- bi->pagesInUse = 0;
- bi->softDeletions = 0;
-
- yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
-
- bi->blockState = state;
- bi->sequenceNumber = sequenceNumber;
-
- if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
- bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
- 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));
-
+ /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
+ * We put it in unlinked dir to be cleaned up after the scanning
+ */
+ obj =
+ yaffs_FindOrCreateObjectByNumber(dev, objId,
+ YAFFS_OBJECT_TYPE_FILE);
+ if (!obj)
+ return;
+ obj->isShadowed = 1;
+ yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
+ obj->variant.fileVariant.shrinkSize = 0;
+ obj->valid = 1; /* So that we don't read any other info for this file */
- if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
- dev->blocksInCheckpoint++;
+}
- } else if (state == YAFFS_BLOCK_STATE_DEAD) {
- T(YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("block %d is bad" TENDSTR), blk));
- } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block empty " TENDSTR)));
- dev->nErasedBlocks++;
- dev->nFreeChunks += dev->nChunksPerBlock;
- } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- /* Determine the highest sequence number */
- if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
- sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
+void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
+{
+ yaffs_Object *hl;
+ yaffs_Object *in;
- blockIndex[nBlocksToScan].seq = sequenceNumber;
- blockIndex[nBlocksToScan].block = blk;
+ while (hardList) {
+ hl = hardList;
+ hardList = (yaffs_Object *) (hardList->hardLinks.next);
- nBlocksToScan++;
+ in = yaffs_FindObjectByNumber(dev,
+ hl->variant.hardLinkVariant.
+ equivalentObjectId);
- if (sequenceNumber >= dev->sequenceNumber)
- dev->sequenceNumber = sequenceNumber;
- } else {
- /* TODO: Nasty sequence number! */
- T(YAFFS_TRACE_SCAN,
- (TSTR
- ("Block scanning block %d has bad sequence number %d"
- TENDSTR), blk, sequenceNumber));
+ if (in) {
+ /* 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);
- }
}
}
-
- T(YAFFS_TRACE_SCAN,
- (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
-
+}
- YYIELD();
+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;
- /* Sort the blocks */
-#ifndef CONFIG_YAFFS_USE_OWN_SORT
- {
- /* Use qsort now. */
- yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
+ /* 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);
+ }
}
-#else
- {
- /* Dungy old bubble sort... */
- yaffs_BlockIndex temp;
- int i;
- int j;
-
- for (i = 0; i < nBlocksToScan; i++)
- for (j = i + 1; j < nBlocksToScan; j++)
- if (blockIndex[i].seq > blockIndex[j].seq) {
- temp = blockIndex[j];
- blockIndex[j] = blockIndex[i];
- blockIndex[i] = temp;
- }
+ ylist_for_each_safe(i, n,
+ &dev->deletedDir->variant.directoryVariant.children) {
+ if (i) {
+ l = ylist_entry(i, yaffs_Object, siblings);
+ yaffs_DeleteObject(l);
+ }
}
-#endif
-
- YYIELD();
-
- T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
-
- /* Now scan the blocks looking at the data. */
- startIterator = 0;
- endIterator = nBlocksToScan - 1;
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
-
- /* For each block.... backwards */
- for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
- blockIterator--) {
- /* Cooperative multitasking! This loop can run for so
- long that watchdog timers expire. */
- YYIELD();
-
- /* get the block to scan in the correct order */
- blk = blockIndex[blockIterator].block;
-
- bi = yaffs_GetBlockInfo(dev, blk);
+}
- state = bi->blockState;
-
- deleted = 0;
-
- /* For each chunk in each block that needs scanning.... */
- foundChunksInBlock = 0;
- for (c = dev->nChunksPerBlock - 1;
- !alloc_failed && c >= 0 &&
- (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
- state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
- /* Scan backwards...
- * Read the tags and decide what to do
- */
-
- chunk = blk * dev->nChunksPerBlock + c;
-
- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
- &tags);
-
- /* Let's have a good look at this chunk... */
-
- if (!tags.chunkUsed) {
- /* An unassigned chunk in the block.
- * If there are used chunks after this one, then
- * it is a chunk that was skipped due to failing the erased
- * check. Just skip it so that it can be deleted.
- * But, more typically, We get here when this is an unallocated
- * chunk and his means that either the block is empty or
- * this is the one being allocated from
- */
-
- if (foundChunksInBlock) {
- /* This is a chunk that was skipped due to failing the erased check */
- } else if (c == 0) {
- /* We're looking at the first chunk in the block so the block is unused */
- state = YAFFS_BLOCK_STATE_EMPTY;
- dev->nErasedBlocks++;
- } else {
- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
- state == YAFFS_BLOCK_STATE_ALLOCATING) {
- if (dev->sequenceNumber == bi->sequenceNumber) {
- /* this is the block being allocated from */
-
- T(YAFFS_TRACE_SCAN,
- (TSTR
- (" Allocating from %d %d"
- TENDSTR), blk, c));
-
- state = YAFFS_BLOCK_STATE_ALLOCATING;
- dev->allocationBlock = blk;
- dev->allocationPage = c;
- dev->allocationBlockFinder = blk;
- } else {
- /* This is a partially written block that is not
- * the current allocation block. This block must have
- * had a write failure, so set up for retirement.
- */
-
- /* bi->needsRetiring = 1; ??? TODO */
- bi->gcPrioritise = 1;
-
- 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->nDataBytesPerChunk;
-
- foundChunksInBlock = 1;
-
-
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
-
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.
- objectId,
- YAFFS_OBJECT_TYPE_FILE);
- if (!in) {
- /* Out of memory */
- alloc_failed = 1;
- }
-
- if (in &&
- in->variantType == YAFFS_OBJECT_TYPE_FILE
- && chunkBase <
- in->variant.fileVariant.shrinkSize) {
- /* This has not been invalidated by a resize */
- if (!yaffs_PutChunkIntoFile(in, tags.chunkId,
- chunk, -1)) {
- alloc_failed = 1;
- }
-
- /* File size is calculated by looking at the data chunks if we have not
- * seen an object header yet. Stop this practice once we find an object header.
- */
- endpos =
- (tags.chunkId -
- 1) * dev->nDataBytesPerChunk +
- tags.byteCount;
-
- if (!in->valid && /* have not got an object header yet */
- in->variant.fileVariant.
- scannedFileSize < endpos) {
- in->variant.fileVariant.
- scannedFileSize = endpos;
- in->variant.fileVariant.
- fileSize =
- in->variant.fileVariant.
- scannedFileSize;
- }
-
- } else if (in) {
- /* This chunk has been invalidated by a resize, so delete */
- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+/*
+ * 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);
+}
- }
- } else {
- /* chunkId == 0, so it is an ObjectHeader.
- * Thus, we read in the object header and make the object
- */
- foundChunksInBlock = 1;
+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;
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
- oh = NULL;
- in = NULL;
+ /* Iterate through the objects in each hash entry,
+ * looking at each object.
+ * Make sure it is rooted.
+ */
- if (tags.extraHeaderInfoAvailable) {
- in = yaffs_FindOrCreateObjectByNumber
- (dev, tags.objectId,
- tags.extraObjectType);
- if (!in)
- alloc_failed = 1;
+ 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;
}
-
- if (!in ||
- (!in->valid && dev->disableLazyLoad) ||
- tags.extraShadows ||
- (!in->valid &&
- (tags.objectId == YAFFS_OBJECTID_ROOT ||
- tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
-
- /* If we don't have valid info then we need to read the chunk
- * TODO In future we can probably defer reading the chunk and
- * living with invalid data until needed.
+ 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;
- result = yaffs_ReadChunkWithTagsFromNAND(dev,
- chunk,
- chunkData,
- NULL);
-
- oh = (yaffs_ObjectHeader *) chunkData;
-
- if (dev->inbandTags) {
- /* Fix up the header if they got corrupted by inband tags */
- oh->shadowsObject = oh->inbandShadowsObject;
- oh->isShrink = oh->inbandIsShrink;
- }
-
- if (!in) {
- in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
- if (!in)
- alloc_failed = 1;
+ 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 (!in) {
- /* TODO Hoosterman we have a problem! */
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
- TENDSTR), tags.objectId, chunk));
- continue;
+ if(hanging){
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("Hanging object %d moved to lost and found" TENDSTR),
+ obj->objectId));
+ yaffs_AddObjectToDirectory(dev->lostNFoundDir,obj);
}
+ }
+ }
+ }
+}
- if (in->valid) {
- /* We have already filled this one.
- * We have a duplicate that will be discarded, but
- * we first have to suck out resize info if it is a file.
- */
- if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
- ((oh &&
- oh->type == YAFFS_OBJECT_TYPE_FILE) ||
- (tags.extraHeaderInfoAvailable &&
- tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
- __u32 thisSize =
- (oh) ? oh->fileSize : tags.
- extraFileLength;
- __u32 parentObjectId =
- (oh) ? oh->
- parentObjectId : tags.
- extraParentObjectId;
-
-
- isShrink =
- (oh) ? oh->isShrink : tags.
- extraIsShrinkHeader;
-
- /* If it is deleted (unlinked at start also means deleted)
- * we treat the file size as being zeroed at this point.
- */
- if (parentObjectId ==
- YAFFS_OBJECTID_DELETED
- || parentObjectId ==
- YAFFS_OBJECTID_UNLINKED) {
- thisSize = 0;
- isShrink = 1;
- }
+/*
+ * 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 (isShrink &&
- in->variant.fileVariant.
- shrinkSize > thisSize) {
- in->variant.fileVariant.
- shrinkSize =
- thisSize;
- }
+ 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);
- if (isShrink)
- bi->hasShrinkHeader = 1;
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("Deleting lost_found object %d" TENDSTR),
+ obj->objectId));
- }
- /* Use existing - destroy this one. */
- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+ /* 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);
+}
- if (!in->valid && in->variantType !=
- (oh ? oh->type : tags.extraObjectType))
- T(YAFFS_TRACE_ERROR, (
- TSTR("yaffs tragedy: Bad object type, "
- TCONT("%d != %d, for object %d at chunk ")
- TCONT("%d during scan")
- TENDSTR), oh ?
- oh->type : tags.extraObjectType,
- in->variantType, tags.objectId,
- chunk));
-
- if (!in->valid &&
- (tags.objectId == YAFFS_OBJECTID_ROOT ||
- tags.objectId ==
- YAFFS_OBJECTID_LOSTNFOUND)) {
- /* We only load some info, don't fiddle with directory structure */
- in->valid = 1;
-
- if (oh) {
- in->variantType = oh->type;
-
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
+static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
+{
+ __u8 *chunkData;
+ yaffs_ObjectHeader *oh;
+ yaffs_Device *dev;
+ yaffs_ExtendedTags tags;
+ int result;
+ int alloc_failed = 0;
-#endif
- } else {
- in->variantType = tags.extraObjectType;
- in->lazyLoaded = 1;
- }
+ if (!in)
+ return;
- in->hdrChunk = chunk;
+ dev = in->myDev;
- } else if (!in->valid) {
- /* we need to load this info */
+#if 0
+ T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
+ in->objectId,
+ in->lazyLoaded ? "not yet" : "already"));
+#endif
- in->valid = 1;
- in->hdrChunk = chunk;
+ if (in->lazyLoaded && in->hdrChunk > 0) {
+ in->lazyLoaded = 0;
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
- if (oh) {
- in->variantType = oh->type;
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
+ oh = (yaffs_ObjectHeader *) chunkData;
- in->yst_mode = oh->yst_mode;
+ 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;
-#endif
-
- if (oh->shadowsObject > 0)
- yaffs_HandleShadowedObject(dev,
- oh->
- shadowsObject,
- 1);
-
-
- yaffs_SetObjectName(in, oh->name);
- parent =
- yaffs_FindOrCreateObjectByNumber
- (dev, oh->parentObjectId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
-
- fileSize = oh->fileSize;
- isShrink = oh->isShrink;
- equivalentObjectId = oh->equivalentObjectId;
-
- } else {
- in->variantType = tags.extraObjectType;
- parent =
- yaffs_FindOrCreateObjectByNumber
- (dev, tags.extraParentObjectId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
- fileSize = tags.extraFileLength;
- isShrink = tags.extraIsShrinkHeader;
- equivalentObjectId = tags.extraEquivalentObjectId;
- in->lazyLoaded = 1;
-
- }
- in->dirty = 0;
-
- if (!parent)
- alloc_failed = 1;
-
- /* directory stuff...
- * hook up to parent
- */
-
- if (parent && parent->variantType ==
- YAFFS_OBJECT_TYPE_UNKNOWN) {
- /* Set up as a directory */
- parent->variantType =
- YAFFS_OBJECT_TYPE_DIRECTORY;
- YINIT_LIST_HEAD(&parent->variant.
- directoryVariant.
- children);
- } else if (!parent || parent->variantType !=
- YAFFS_OBJECT_TYPE_DIRECTORY) {
- /* Hoosterman, another problem....
- * We're trying to use a non-directory as a directory
- */
-
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
- TENDSTR)));
- parent = dev->lostNFoundDir;
- }
-
- yaffs_AddObjectToDirectory(parent, in);
-
- itsUnlinked = (parent == dev->deletedDir) ||
- (parent == dev->unlinkedDir);
-
- if (isShrink) {
- /* Mark the block as having a shrinkHeader */
- bi->hasShrinkHeader = 1;
- }
-
- /* Note re hardlinks.
- * Since we might scan a hardlink before its equivalent object is scanned
- * we put them all in a list.
- * After scanning is complete, we should have all the objects, so we run
- * through this list and fix up all the chains.
- */
-
- switch (in->variantType) {
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* Todo got a problem */
- break;
- case YAFFS_OBJECT_TYPE_FILE:
-
- if (in->variant.fileVariant.
- scannedFileSize < fileSize) {
- /* This covers the case where the file size is greater
- * than where the data is
- * This will happen if the file is resized to be larger
- * than its current data extents.
- */
- in->variant.fileVariant.fileSize = fileSize;
- in->variant.fileVariant.scannedFileSize =
- in->variant.fileVariant.fileSize;
- }
-
- if (isShrink &&
- in->variant.fileVariant.shrinkSize > fileSize) {
- in->variant.fileVariant.shrinkSize = fileSize;
- }
-
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- if (!itsUnlinked) {
- in->variant.hardLinkVariant.equivalentObjectId =
- equivalentObjectId;
- in->hardLinks.next =
- (struct ylist_head *) hardList;
- hardList = in;
- }
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- if (oh) {
- in->variant.symLinkVariant.alias =
- yaffs_CloneString(oh->alias);
- if (!in->variant.symLinkVariant.alias)
- alloc_failed = 1;
- }
- break;
- }
-
- }
-
- }
-
- } /* End of scanning for each chunk */
-
- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- /* If we got this far while scanning, then the block is fully allocated. */
- state = YAFFS_BLOCK_STATE_FULL;
- }
+ 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;
- bi->blockState = state;
+#endif
+ yaffs_SetObjectName(in, oh->name);
- /* Now let's see if it was dirty */
- if (bi->pagesInUse == 0 &&
- !bi->hasShrinkHeader &&
- bi->blockState == YAFFS_BLOCK_STATE_FULL) {
- yaffs_BlockBecameDirty(dev, blk);
+ if (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__);
}
-
- if (altBlockIndex)
- YFREE_ALT(blockIndex);
- else
- YFREE(blockIndex);
-
- /* Ok, we've done all the scanning.
- * Fix up the hard link chains.
- * We should now have scanned all the objects, now it's time to add these
- * hardlinks.
- */
- yaffs_HardlinkFixup(dev, hardList);
-
-
- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
-
- if (alloc_failed)
- return YAFFS_FAIL;
-
- T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
-
- return YAFFS_OK;
}
/*------------------------------ Directory Functions ----------------------------- */
* 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;
+ 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));
+ }
+
+ } else
+ yaffs_UpdateObjectHeader(obj, NULL, 0, 0, 0, NULL);
+}
+
+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)));
- yaffs_UpdateObjectHeader(obj,NULL,0,0,0);
+ 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, NULL);
+ }
}
static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
yaffs_VerifyDirectory(parent);
- if (dev && dev->removeObjectCallback)
- dev->removeObjectCallback(obj);
+ if (dev && dev->param.removeObjectCallback)
+ dev->param.removeObjectCallback(obj);
ylist_del_init(&obj->siblings);
yaffs_VerifyDirectory(parent);
}
-static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
+void yaffs_AddObjectToDirectory(yaffs_Object *directory,
yaffs_Object *obj)
{
if (!directory) {
}
#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
else if (obj->shortName[0])
- yaffs_strcpy(name, obj->shortName);
+ yaffs_strncpy(name, obj->shortName,YAFFS_SHORT_NAME_LENGTH+1);
#endif
else {
int result;
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)
if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK){
if(!obj->variant.symLinkVariant.alias)
return 0;
- return yaffs_strlen(obj->variant.symLinkVariant.alias);
+ return yaffs_strnlen(obj->variant.symLinkVariant.alias,YAFFS_MAX_ALIAS_LENGTH);
} else {
/* Only a directory should drop through to here */
return obj->myDev->nDataBytesPerChunk;
if (valid & ATTR_SIZE)
yaffs_ResizeFile(obj, attr->ia_size);
- yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
+ yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0, NULL);
return YAFFS_OK;
#endif
+
+static int yaffs_DoXMod(yaffs_Object *obj, int set, const char *name, const void *value, int size, int flags)
+{
+ yaffs_XAttrMod xmod;
+
+ int result;
+
+ xmod.set = set;
+ xmod.name = name;
+ xmod.data = value;
+ xmod.size = size;
+ xmod.flags = flags;
+ xmod.result = -ENOSPC;
+
+ result = yaffs_UpdateObjectHeader(obj, NULL, 0, 0, 0, &xmod);
+
+ if(result > 0)
+ return xmod.result;
+ else
+ return -ENOSPC;
+}
+
+static int yaffs_ApplyXMod(yaffs_Device *dev, char *buffer, yaffs_XAttrMod *xmod)
+{
+ int retval = 0;
+ int x_offs = sizeof(yaffs_ObjectHeader);
+ int x_size = dev->nDataBytesPerChunk - sizeof(yaffs_ObjectHeader);
+
+ char * x_buffer = buffer + x_offs;
+
+ if(xmod->set)
+ retval = nval_set(x_buffer, x_size, xmod->name, xmod->data, xmod->size, xmod->flags);
+ else
+ retval = nval_del(x_buffer, x_size, xmod->name);
+
+ xmod->result = retval;
+
+ return retval;
+}
+
+static int yaffs_DoXFetch(yaffs_Object *obj, const char *name, void *value, int size)
+{
+ char *buffer = NULL;
+ int result;
+ yaffs_ExtendedTags tags;
+ yaffs_Device *dev = obj->myDev;
+ int x_offs = sizeof(yaffs_ObjectHeader);
+ int x_size = dev->nDataBytesPerChunk - sizeof(yaffs_ObjectHeader);
+
+ __u8 * x_buffer;
+
+ int retval = 0;
+
+ if(obj->hdrChunk < 1)
+ return -ENODATA;
+
+ buffer = yaffs_GetTempBuffer(dev, __LINE__);
+ if(!buffer)
+ return -ENOMEM;
+
+ result = yaffs_ReadChunkWithTagsFromNAND(dev,obj->hdrChunk, buffer, &tags);
+
+ if(result != YAFFS_OK)
+ retval = -ENOENT;
+ else{
+ x_buffer = buffer + x_offs;
+
+ if(name)
+ retval = nval_get(x_buffer, x_size, name, value, size);
+ else
+ retval = nval_list(x_buffer, x_size, value,size);
+ }
+ yaffs_ReleaseTempBuffer(dev,buffer,__LINE__);
+ return retval;
+}
+
+int yaffs_SetXAttribute(yaffs_Object *obj, const char *name, const void * value, int size, int flags)
+{
+ return yaffs_DoXMod(obj, 1, name, value, size, flags);
+}
+
+int yaffs_RemoveXAttribute(yaffs_Object *obj, const char *name)
+{
+ return yaffs_DoXMod(obj, 0, name, NULL, 0, 0);
+}
+
+int yaffs_GetXAttribute(yaffs_Object *obj, const char *name, void *value, int size)
+{
+ return yaffs_DoXFetch(obj, name, value, size);
+}
+
+int yaffs_ListXAttributes(yaffs_Object *obj, char *buffer, int size)
+{
+ return yaffs_DoXFetch(obj, NULL, buffer,size);
+}
+
+
+
#if 0
int yaffs_DumpObject(yaffs_Object *obj)
{
{
/* 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 */
}
return YAFFS_FAIL;
}
- dev->internalStartBlock = dev->startBlock;
- dev->internalEndBlock = dev->endBlock;
+ dev->internalStartBlock = dev->param.startBlock;
+ dev->internalEndBlock = dev->param.endBlock;
dev->blockOffset = 0;
dev->chunkOffset = 0;
dev->nFreeChunks = 0;
- dev->gcBlock = -1;
+ dev->gcBlock = 0;
- if (dev->startBlock == 0) {
- dev->internalStartBlock = dev->startBlock + 1;
- dev->internalEndBlock = dev->endBlock + 1;
+ if (dev->param.startBlock == 0) {
+ dev->internalStartBlock = dev->param.startBlock + 1;
+ dev->internalEndBlock = dev->param.endBlock + 1;
dev->blockOffset = 1;
- dev->chunkOffset = dev->nChunksPerBlock;
+ dev->chunkOffset = dev->param.nChunksPerBlock;
}
/* Check geometry parameters. */
- if ((!dev->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
- (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
- (dev->inbandTags && !dev->isYaffs2) ||
- dev->nChunksPerBlock < 2 ||
- dev->nReservedBlocks < 2 ||
+ if ((!dev->param.inbandTags && dev->param.isYaffs2 && dev->param.totalBytesPerChunk < 1024) ||
+ (!dev->param.isYaffs2 && dev->param.totalBytesPerChunk < 512) ||
+ (dev->param.inbandTags && !dev->param.isYaffs2) ||
+ dev->param.nChunksPerBlock < 2 ||
+ dev->param.nReservedBlocks < 2 ||
dev->internalStartBlock <= 0 ||
dev->internalEndBlock <= 0 ||
- dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)) { /* otherwise it is too small */
+ dev->internalEndBlock <= (dev->internalStartBlock + dev->param.nReservedBlocks + 2)) { /* otherwise it is too small */
T(YAFFS_TRACE_ALWAYS,
(TSTR
("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
- TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
+ TENDSTR), dev->param.totalBytesPerChunk, dev->param.isYaffs2 ? "2" : "", dev->param.inbandTags));
return YAFFS_FAIL;
}
}
/* Sort out space for inband tags, if required */
- if (dev->inbandTags)
- dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
+ if (dev->param.inbandTags)
+ dev->nDataBytesPerChunk = dev->param.totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
else
- dev->nDataBytesPerChunk = dev->totalBytesPerChunk;
+ dev->nDataBytesPerChunk = dev->param.totalBytesPerChunk;
/* Got the right mix of functions? */
if (!yaffs_CheckDevFunctions(dev)) {
* We need to find the next power of 2 > than internalEndBlock
*/
- x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
+ x = dev->param.nChunksPerBlock * (dev->internalEndBlock + 1);
bits = ShiftsGE(x);
/* Set up tnode width if wide tnodes are enabled. */
- if (!dev->wideTnodesDisabled) {
+ if (!dev->param.wideTnodesDisabled) {
/* bits must be even so that we end up with 32-bit words */
if (bits & 1)
bits++;
else
dev->chunkGroupBits = bits - dev->tnodeWidth;
+ dev->tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+ if(dev->tnodeSize < sizeof(yaffs_Tnode))
+ dev->tnodeSize = sizeof(yaffs_Tnode);
dev->chunkGroupSize = 1 << dev->chunkGroupBits;
- if (dev->nChunksPerBlock < dev->chunkGroupSize) {
+ if (dev->param.nChunksPerBlock < dev->chunkGroupSize) {
/* We have a problem because the soft delete won't work if
* the chunk group size > chunks per block.
* This can be remedied by using larger "virtual blocks".
/* OK, we've finished verifying the device, lets continue with initialisation */
/* More device initialisation */
- dev->garbageCollections = 0;
- dev->passiveGarbageCollections = 0;
- dev->currentDirtyChecker = 0;
+ dev->allGCs = 0;
+ dev->passiveGCs = 0;
+ dev->oldestDirtyGCs = 0;
+ dev->backgroundGCs = 0;
+ dev->gcBlockFinder = 0;
dev->bufferedBlock = -1;
dev->doingBufferedBlockRewrite = 0;
dev->nDeletedFiles = 0;
dev->tagsEccUnfixed = 0;
dev->nErasureFailures = 0;
dev->nErasedBlocks = 0;
- dev->isDoingGC = 0;
+ dev->gcDisable= 0;
dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
+ YINIT_LIST_HEAD(&dev->dirtyDirectories);
+ dev->oldestDirtySequence = 0;
+ dev->oldestDirtyBlock = 0;
/* Initialise temporary buffers and caches. */
if (!yaffs_InitialiseTempBuffers(dev))
if (!init_failed &&
- dev->nShortOpCaches > 0) {
+ dev->param.nShortOpCaches > 0) {
int i;
void *buf;
- int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
+ int srCacheBytes = dev->param.nShortOpCaches * sizeof(yaffs_ChunkCache);
- if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
- dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
+ if (dev->param.nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
+ dev->param.nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
dev->srCache = YMALLOC(srCacheBytes);
if (dev->srCache)
memset(dev->srCache, 0, srCacheBytes);
- for (i = 0; i < dev->nShortOpCaches && buf; i++) {
+ for (i = 0; i < dev->param.nShortOpCaches && buf; i++) {
dev->srCache[i].object = NULL;
dev->srCache[i].lastUse = 0;
dev->srCache[i].dirty = 0;
- dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk);
+ dev->srCache[i].data = buf = YMALLOC_DMA(dev->param.totalBytesPerChunk);
}
if (!buf)
init_failed = 1;
dev->cacheHits = 0;
if (!init_failed) {
- dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
+ dev->gcCleanupList = YMALLOC(dev->param.nChunksPerBlock * sizeof(__u32));
if (!dev->gcCleanupList)
init_failed = 1;
}
- if (dev->isYaffs2)
- dev->useHeaderFileSize = 1;
+ if (dev->param.isYaffs2)
+ dev->param.useHeaderFileSize = 1;
if (!init_failed && !yaffs_InitialiseBlocks(dev))
init_failed = 1;
- yaffs_InitialiseTnodes(dev);
- yaffs_InitialiseObjects(dev);
+ yaffs_InitialiseTnodesAndObjects(dev);
if (!init_failed && !yaffs_CreateInitialDirectories(dev))
init_failed = 1;
if (!init_failed) {
/* Now scan the flash. */
- if (dev->isYaffs2) {
- if (yaffs_CheckpointRestore(dev)) {
+ if (dev->param.isYaffs2) {
+ if (yaffs2_CheckpointRestore(dev)) {
yaffs_CheckObjectDetailsLoaded(dev->rootDir);
T(YAFFS_TRACE_ALWAYS,
(TSTR("yaffs: restored from checkpoint" TENDSTR)));
* and scan backwards.
*/
yaffs_DeinitialiseBlocks(dev);
- yaffs_DeinitialiseTnodes(dev);
- yaffs_DeinitialiseObjects(dev);
+ yaffs_DeinitialiseTnodesAndObjects(dev);
dev->nErasedBlocks = 0;
dev->nFreeChunks = 0;
dev->nDeletedFiles = 0;
dev->nUnlinkedFiles = 0;
dev->nBackgroundDeletions = 0;
- dev->oldestDirtySequence = 0;
if (!init_failed && !yaffs_InitialiseBlocks(dev))
init_failed = 1;
- yaffs_InitialiseTnodes(dev);
- yaffs_InitialiseObjects(dev);
+ yaffs_InitialiseTnodesAndObjects(dev);
if (!init_failed && !yaffs_CreateInitialDirectories(dev))
init_failed = 1;
- if (!init_failed && !yaffs_ScanBackwards(dev))
+ if (!init_failed && !yaffs2_ScanBackwards(dev))
init_failed = 1;
}
- } else if (!yaffs_Scan(dev))
+ } else if (!yaffs1_Scan(dev))
init_failed = 1;
yaffs_StripDeletedObjects(dev);
yaffs_FixHangingObjects(dev);
- if(dev->emptyLostAndFound)
+ if(dev->param.emptyLostAndFound)
yaffs_EmptyLostAndFound(dev);
}
/* Clean up any aborted checkpoint data */
if(!dev->isCheckpointed && dev->blocksInCheckpoint > 0)
- yaffs_InvalidateCheckpoint(dev);
+ yaffs2_InvalidateCheckpoint(dev);
T(YAFFS_TRACE_TRACING,
(TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
int i;
yaffs_DeinitialiseBlocks(dev);
- yaffs_DeinitialiseTnodes(dev);
- yaffs_DeinitialiseObjects(dev);
- if (dev->nShortOpCaches > 0 &&
+ yaffs_DeinitialiseTnodesAndObjects(dev);
+ if (dev->param.nShortOpCaches > 0 &&
dev->srCache) {
- for (i = 0; i < dev->nShortOpCaches; i++) {
+ for (i = 0; i < dev->param.nShortOpCaches; i++) {
if (dev->srCache[i].data)
YFREE(dev->srCache[i].data);
dev->srCache[i].data = NULL;
dev->isMounted = 0;
- if (dev->deinitialiseNAND)
- dev->deinitialiseNAND(dev);
+ if (dev->param.deinitialiseNAND)
+ dev->param.deinitialiseNAND(dev);
}
}
static int yaffs_CountFreeChunks(yaffs_Device *dev)
{
- int 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;
/* Now count the number of dirty chunks in the cache and subtract those */
- for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
+ for (nDirtyCacheChunks = 0, i = 0; i < dev->param.nShortOpCaches; i++) {
if (dev->srCache[i].dirty)
nDirtyCacheChunks++;
}
nFree -= nDirtyCacheChunks;
- nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
+ nFree -= ((dev->param.nReservedBlocks + 1) * dev->param.nChunksPerBlock);
/* Now we figure out how much to reserve for the checkpoint and report that... */
- blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
- if (blocksForCheckpoint < 0)
- blocksForCheckpoint = 0;
+ blocksForCheckpoint = yaffs2_CalcCheckpointBlocksRequired(dev);
- nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
+ nFree -= (blocksForCheckpoint * dev->param.nChunksPerBlock);
if (nFree < 0)
nFree = 0;
static int yaffs_freeVerificationFailures;
-static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
+void yaffs_VerifyFreeChunks(yaffs_Device *dev)
{
int counted;
int difference;
do { \
if (sizeof(structure) != syze) { \
T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\
- name, syze, sizeof(structure))); \
+ name, syze, (int) sizeof(structure))); \
return YAFFS_FAIL; \
} \
} while (0)
/* 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
#ifndef CONFIG_YAFFS_WINCE
yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");