#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"
/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */
#define YAFFS_GC_GOOD_ENOUGH 2
#define YAFFS_GC_PASSIVE_THRESHOLD 4
-#define YAFFS_SMALL_HOLE_THRESHOLD 3
-
-/*
- * Checkpoints are really no benefit on very small partitions.
- *
- * To save space on small partitions don't bother with checkpoints unless
- * the partition is at least this big.
- */
-#define YAFFS_CHECKPOINT_MIN_BLOCKS 60
-
#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_DoGenericObjectDeletion(yaffs_Object *in);
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_HandleHole(yaffs_Object *obj, loff_t newSize);
-static void yaffs_SkipRestOfBlock(yaffs_Device *dev);
static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
int chunkInNAND,
const __u8 *data,
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->param.nChunksPerBlock) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
- blk, chunk));
- YBUG();
- }
-}
-
-static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
-{
- __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
*/
"Dead"
};
+
static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
{
int actuallyUsed;
/* Check that the sequence number is valid.
* Ten million is legal, but is very unlikely
*/
- if (dev->param.isYaffs2 &&
- (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
- (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
- n, bi->sequenceNumber));
+
+ 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];
}
}
-static void yaffs_VerifyObjects(yaffs_Device *dev)
+void yaffs_VerifyObjects(yaffs_Device *dev)
{
yaffs_Object *obj;
int i;
int writeOk = 0;
int chunk;
- yaffs_InvalidateCheckpoint(dev);
+ yaffs2_InvalidateCheckpoint(dev);
do {
yaffs_BlockInfo *bi = 0;
}
-/*
- * Oldest Dirty Sequence Number handling.
- */
-
-/* yaffs_CalcOldestDirtySequence()
- * yaffs_FindOldestDirtySequence()
- * Calculate the oldest dirty sequence number if we don't know it.
- */
-static void yaffs_CalcOldestDirtySequence(yaffs_Device *dev)
-{
- int i;
- unsigned seq;
- unsigned blockNo = 0;
- yaffs_BlockInfo *b;
-
- if(!dev->param.isYaffs2)
- return;
-
- /* Find the oldest dirty sequence number. */
- seq = dev->sequenceNumber + 1;
- b = dev->blockInfo;
- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
- if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
- (b->pagesInUse - b->softDeletions) < dev->param.nChunksPerBlock &&
- b->sequenceNumber < seq) {
- seq = b->sequenceNumber;
- blockNo = i;
- }
- b++;
- }
-
- if(blockNo){
- dev->oldestDirtySequence = seq;
- dev->oldestDirtyBlock = blockNo;
- }
-
-}
-
-
-static void yaffs_FindOldestDirtySequence(yaffs_Device *dev)
-{
- if(dev->param.isYaffs2 && !dev->oldestDirtySequence)
- yaffs_CalcOldestDirtySequence(dev);
-}
-
-/*
- * yaffs_ClearOldestDirtySequence()
- * Called when a block is erased or marked bad. (ie. when its sequenceNumber
- * becomes invalid). If the value matches the oldest then we clear
- * dev->oldestDirtySequence to force its recomputation.
- */
-static void yaffs_ClearOldestDirtySequence(yaffs_Device *dev, yaffs_BlockInfo *bi)
-{
-
- if(!dev->param.isYaffs2)
- return;
-
- if(!bi || bi->sequenceNumber == dev->oldestDirtySequence){
- dev->oldestDirtySequence = 0;
- dev->oldestDirtyBlock = 0;
- }
-}
-
-/*
- * yaffs_UpdateOldestDirtySequence()
- * Update the oldest dirty sequence number whenever we dirty a block.
- * Only do this if the oldestDirtySequence is actually being tracked.
- */
-static void yaffs_UpdateOldestDirtySequence(yaffs_Device *dev, unsigned blockNo, yaffs_BlockInfo *bi)
-{
- if(dev->param.isYaffs2 && dev->oldestDirtySequence){
- if(dev->oldestDirtySequence > bi->sequenceNumber){
- dev->oldestDirtySequence = bi->sequenceNumber;
- dev->oldestDirtyBlock = blockNo;
- }
- }
-}
/*
* Block retiring for handling a broken block.
{
yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
- yaffs_InvalidateCheckpoint(dev);
+ yaffs2_InvalidateCheckpoint(dev);
- yaffs_ClearOldestDirtySequence(dev,bi);
+ yaffs2_ClearOldestDirtySequence(dev,bi);
if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
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));
* 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 Y_INLINE int yaffs_CalcTnodeSize(yaffs_Device *dev)
-{
- int tnodeSize;
- /* Calculate the tnode size in bytes for variable width tnode support.
- * Must be a multiple of 32-bits */
- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
- return tnodeSize;
-}
-static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
+yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
{
- int i;
- int tnodeSize = yaffs_CalcTnodeSize(dev);
- yaffs_Tnode *newTnodes;
- __u8 *mem;
- yaffs_Tnode *curr;
- yaffs_Tnode *next;
- yaffs_TnodeList *tnl;
-
- if (nTnodes < 1)
- return YAFFS_OK;
-
-
- /* 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;
+ yaffs_Tnode *tn = yaffs_AllocateRawTnode(dev);
+ if (tn){
+ memset(tn, 0, dev->tnodeSize);
+ dev->nTnodes++;
}
- T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
-
- return YAFFS_OK;
-}
-
-/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
-
-static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
-{
- yaffs_Tnode *tn = NULL;
-
-#ifdef CONFIG_YAFFS_VALGRIND_TEST
- tn = YMALLOC(yaffs_CalcTnodeSize(dev));
- if(tn)
- dev->nTnodesCreated++;
-#else
- /* If there are none left make more */
- if (!dev->freeTnodes)
- yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
-
- if (dev->freeTnodes) {
- tn = dev->freeTnodes;
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
- /* Hoosterman, this thing looks like it isn't in the list */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
- }
-#endif
- dev->freeTnodes = dev->freeTnodes->internal[0];
- dev->nFreeTnodes--;
- }
-#endif
dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
return tn;
}
-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
-{
- yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
- int tnodeSize = yaffs_CalcTnodeSize(dev);
-
- 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_VALGRIND_TEST
- YFREE(tn);
- dev->nTnodesCreated--;
-#else
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
- /* Hoosterman, this thing looks like it is already in the list */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
- }
- tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- tn->internal[0] = dev->freeTnodes;
- dev->freeTnodes = tn;
- dev->nFreeTnodes++;
-#endif
- }
+ 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;
- dev->nTnodesCreated = 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;
}
* 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)
if (theBlock) {
theBlock->softDeletions++;
dev->nFreeChunks++;
- yaffs_UpdateOldestDirtySequence(dev, blockNo, theBlock);
+ yaffs2_UpdateOldestDirtySequence(dev, blockNo, theBlock);
}
}
hasData++;
}
} else {
- int tnodeSize_u32 = yaffs_CalcTnodeSize(dev)/sizeof(__u32);
+ int tnodeSize_u32 = dev->tnodeSize/sizeof(__u32);
__u32 *map = (__u32 *)tn;
for(i = 0; !hasData && i < tnodeSize_u32; i++){
/*-------------------- 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 CONFIG_YAFFS_VALGRIND_TEST
- tn = YMALLOC(sizeof(yaffs_Object));
- if(tn)
- dev->nObjectsCreated++;
-#else
- /* If there are none left make more */
- if (!dev->freeObjects)
- yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
+ if (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;
- T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
+ T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), obj, obj->myInode));
- if (!tn)
+ if (!obj)
YBUG();
- if (tn->parent)
+ if (obj->parent)
YBUG();
- if (!ylist_empty(&tn->siblings))
+ if (!ylist_empty(&obj->siblings))
YBUG();
- 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;
}
- yaffs_UnhashObject(tn);
+ yaffs_UnhashObject(obj);
-#ifdef CONFIG_YAFFS_VALGRIND_TEST
- YFREE(tn);
- dev->nObjectsCreated--;
- tn = NULL;
-#else
- /* Link into the free list. */
- tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
- dev->freeObjects = tn;
- dev->nFreeObjects++;
-#endif
+ yaffs_FreeRawObject(dev,obj);
+ dev->nObjects--;
dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
}
yaffs_FreeObject(obj);
}
-
-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;
- dev->nObjectsCreated = 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);
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;
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;
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;
}
dev->chunkBits = NULL;
}
-static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
- yaffs_BlockInfo *bi)
-{
-
- if (!dev->param.isYaffs2)
- return 1; /* disqualification only applies to yaffs2. */
-
- if (!bi->hasShrinkHeader)
- return 1; /* can gc */
-
- yaffs_FindOldestDirtySequence(dev);
-
- /* Can't do gc of this block if there are any blocks older than this one that have
- * discarded pages.
- */
- return (bi->sequenceNumber <= dev->oldestDirtySequence);
-}
-
-/*
- * yaffs_FindRefreshBlock()
- * periodically finds the oldest full block by sequence number for refreshing.
- * Only for yaffs2.
- */
-static __u32 yaffs_FindRefreshBlock(yaffs_Device *dev)
-{
- __u32 b ;
-
- __u32 oldest = 0;
- __u32 oldestSequence = 0;
-
- yaffs_BlockInfo *bi;
-
- /*
- * If refresh period < 10 then refreshing is disabled.
- */
- if(dev->param.refreshPeriod < 10 ||
- !dev->param.isYaffs2)
- return oldest;
-
- /*
- * Fix broken values.
- */
- if(dev->refreshSkip > dev->param.refreshPeriod)
- dev->refreshSkip = dev->param.refreshPeriod;
-
- if(dev->refreshSkip > 0)
- return oldest;
-
- /*
- * Refresh skip is now zero.
- * We'll do a refresh this time around....
- * Update the refresh skip and find the oldest block.
- */
- dev->refreshSkip = dev->param.refreshPeriod;
- dev->refreshCount++;
- bi = dev->blockInfo;
- for (b = dev->internalStartBlock; b <=dev->internalEndBlock; b++){
-
- if (bi->blockState == YAFFS_BLOCK_STATE_FULL){
-
- if(oldest < 1 ||
- bi->sequenceNumber < oldestSequence){
- oldest = b;
- oldestSequence = bi->sequenceNumber;
- }
- }
- bi++;
- }
-
- if (oldest > 0) {
- T(YAFFS_TRACE_GC,
- (TSTR("GC refresh count %d selected block %d with sequenceNumber %d" TENDSTR),
- dev->refreshCount, oldest, oldestSequence));
- }
-
- return oldest;
-}
-
-
-static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
+void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
{
yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
(TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
- yaffs_ClearOldestDirtySequence(dev,bi);
+ yaffs2_ClearOldestDirtySequence(dev,bi);
bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
}
if (!bi->needsRetiring) {
- yaffs_InvalidateCheckpoint(dev);
+ yaffs2_InvalidateCheckpoint(dev);
erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
if (!erasedOk) {
dev->nErasureFailures++;
}
-
-static int yaffs_CheckpointRequired(yaffs_Device *dev)
-{
- int nblocks = dev->internalEndBlock - dev->internalStartBlock + 1 ;
- return dev->param.isYaffs2 &&
- !dev->param.skipCheckpointWrite &&
- (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS);
-}
-static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
-{
- if (!dev->nCheckpointBlocksRequired &&
- yaffs_CheckpointRequired(dev)){
- /* Not a valid value so recalculate */
- int nBytes = 0;
- int nBlocks;
- int devBlocks = (dev->param.endBlock - dev->param.startBlock + 1);
- int tnodeSize = yaffs_CalcTnodeSize(dev);
-
- nBytes += sizeof(yaffs_CheckpointValidity);
- nBytes += sizeof(yaffs_CheckpointDevice);
- nBytes += devBlocks * sizeof(yaffs_BlockInfo);
- nBytes += devBlocks * dev->chunkBitmapStride;
- nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
- nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
- nBytes += sizeof(yaffs_CheckpointValidity);
- nBytes += sizeof(__u32); /* checksum*/
-
- /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
-
- nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->param.nChunksPerBlock)) + 3;
-
- dev->nCheckpointBlocksRequired = nBlocks;
- }
-
- return dev->nCheckpointBlocksRequired;
-}
-
-/*
- * Check if there's space to allocate...
- * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
- */
-static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev, int nChunks)
+/*
+ * Check if there's space to allocate...
+ * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
+ */
+int yaffs_CheckSpaceForAllocation(yaffs_Device *dev, int nChunks)
{
int reservedChunks;
int reservedBlocks = dev->param.nReservedBlocks;
int checkpointBlocks;
- if (dev->param.isYaffs2) {
- checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
- dev->blocksInCheckpoint;
- if (checkpointBlocks < 0)
- checkpointBlocks = 0;
- } else {
- checkpointBlocks = 0;
- }
+ checkpointBlocks = yaffs2_CalcCheckpointBlocksRequired(dev);
reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->param.nChunksPerBlock);
* yaffs_SkipRestOfBlock() skips over the rest of the allocation block
* if we don't want to write to it.
*/
-static void yaffs_SkipRestOfBlock(yaffs_Device *dev)
+void yaffs_SkipRestOfBlock(yaffs_Device *dev)
{
if(dev->allocationBlock > 0){
yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
if (bi->gcPrioritise) {
prioritisedExists = 1;
if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
+ yaffs2_BlockNotDisqualifiedFromGC(dev, bi)) {
selected = i;
prioritised = 1;
}
if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
pagesUsed < dev->param.nChunksPerBlock &&
(dev->gcDirtiest < 1 || pagesUsed < dev->gcPagesInUse) &&
- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
+ yaffs2_BlockNotDisqualifiedFromGC(dev, bi)) {
dev->gcDirtiest = dev->gcBlockFinder;
dev->gcPagesInUse = pagesUsed;
}
if(!selected && dev->param.isYaffs2 &&
dev->gcNotDone >= ( background ? 10 : 20)){
- yaffs_FindOldestDirtySequence(dev);
+ yaffs2_FindOldestDirtySequence(dev);
if(dev->oldestDirtyBlock > 0) {
selected = dev->oldestDirtyBlock;
dev->gcDirtiest = selected;
do {
maxTries++;
- checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
- if (checkpointBlockAdjust < 0)
- checkpointBlockAdjust = 0;
+ checkpointBlockAdjust = yaffs2_CalcCheckpointBlocksRequired(dev);
minErased = dev->param.nReservedBlocks + checkpointBlockAdjust + 1;
erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
/* If we don't already have a block being gc'd then see if we should start another */
if (dev->gcBlock < 1 && !aggressive) {
- dev->gcBlock = yaffs_FindRefreshBlock(dev);
+ dev->gcBlock = yaffs2_FindRefreshBlock(dev);
dev->gcChunk = 0;
}
if (dev->gcBlock < 1) {
#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 (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->param.isYaffs2 ||
- existingChunk <= 0 ||
+ (existingChunk <= 0 ||
((existingSerial + 1) & 3) == newSerial)) {
/* Forward scanning.
* Use new
bi = yaffs_GetBlockInfo(dev, block);
- yaffs_UpdateOldestDirtySequence(dev, block, bi);
+ 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->param.isYaffs2) {
+ if (!dev->param.isYaffs2 && markNAND &&
+ bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
yaffs_InitialiseTags(&tags);
* 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,0);
yaffs_CheckObjectDetailsLoaded(in);
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++;
}
}
-/*--------------------- Checkpointing --------------------*/
-
-
-static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
-{
- yaffs_CheckpointValidity cp;
-
- memset(&cp, 0, sizeof(cp));
-
- cp.structType = sizeof(cp);
- cp.magic = YAFFS_MAGIC;
- cp.version = YAFFS_CHECKPOINT_VERSION;
- cp.head = (head) ? 1 : 0;
- return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
- 1 : 0;
-}
+/*--------------------- 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_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
+int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
+ int nBytes)
{
- yaffs_CheckpointValidity cp;
- int ok;
- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
-
- if (ok)
- ok = (cp.structType == sizeof(cp)) &&
- (cp.magic == YAFFS_MAGIC) &&
- (cp.version == YAFFS_CHECKPOINT_VERSION) &&
- (cp.head == ((head) ? 1 : 0));
- return ok ? 1 : 0;
-}
-
-static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
- yaffs_Device *dev)
-{
- cp->nErasedBlocks = dev->nErasedBlocks;
- cp->allocationBlock = dev->allocationBlock;
- cp->allocationPage = dev->allocationPage;
- cp->nFreeChunks = dev->nFreeChunks;
+ int chunk;
+ __u32 start;
+ int nToCopy;
+ int n = nBytes;
+ int nDone = 0;
+ yaffs_ChunkCache *cache;
- cp->nDeletedFiles = dev->nDeletedFiles;
- cp->nUnlinkedFiles = dev->nUnlinkedFiles;
- cp->nBackgroundDeletions = dev->nBackgroundDeletions;
- cp->sequenceNumber = dev->sequenceNumber;
+ yaffs_Device *dev;
-}
+ dev = in->myDev;
-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;
+ while (n > 0) {
+ /* chunk = offset / dev->nDataBytesPerChunk + 1; */
+ /* start = offset % dev->nDataBytesPerChunk; */
+ yaffs_AddrToChunk(dev, offset, &chunk, &start);
+ chunk++;
- dev->nDeletedFiles = cp->nDeletedFiles;
- dev->nUnlinkedFiles = cp->nUnlinkedFiles;
- dev->nBackgroundDeletions = cp->nBackgroundDeletions;
- dev->sequenceNumber = cp->sequenceNumber;
-}
+ /* OK now check for the curveball where the start and end are in
+ * the same chunk.
+ */
+ if ((start + n) < dev->nDataBytesPerChunk)
+ nToCopy = n;
+ else
+ nToCopy = dev->nDataBytesPerChunk - start;
+ cache = yaffs_FindChunkCache(in, chunk);
-static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
-{
- yaffs_CheckpointDevice cp;
- __u32 nBytes;
- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 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->param.inbandTags) {
+ if (dev->param.nShortOpCaches > 0) {
- int ok;
+ /* If we can't find the data in the cache, then load it up. */
- /* Write device runtime values*/
- yaffs_DeviceToCheckpointDevice(&cp, dev);
- cp.structType = sizeof(cp);
+ 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;
+ }
- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+ yaffs_UseChunkCache(dev, cache, 0);
- /* Write block info */
- if (ok) {
- nBytes = nBlocks * sizeof(yaffs_BlockInfo);
- ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
- }
+ cache->locked = 1;
- /* Write chunk bits */
- if (ok) {
- nBytes = nBlocks * dev->chunkBitmapStride;
- ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
- }
- return ok ? 1 : 0;
-}
+ memcpy(buffer, &cache->data[start], nToCopy);
-static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
-{
- yaffs_CheckpointDevice cp;
- __u32 nBytes;
- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
+ cache->locked = 0;
+ } else {
+ /* Read into the local buffer then copy..*/
- int ok;
+ __u8 *localBuffer =
+ yaffs_GetTempBuffer(dev, __LINE__);
+ yaffs_ReadChunkDataFromObject(in, chunk,
+ localBuffer);
- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
- if (!ok)
- return 0;
+ memcpy(buffer, &localBuffer[start], nToCopy);
- if (cp.structType != sizeof(cp))
- return 0;
+ yaffs_ReleaseTempBuffer(dev, localBuffer,
+ __LINE__);
+ }
- yaffs_CheckpointDeviceToDevice(dev, &cp);
+ } else {
- nBytes = nBlocks * sizeof(yaffs_BlockInfo);
+ /* A full chunk. Read directly into the supplied buffer. */
+ yaffs_ReadChunkDataFromObject(in, chunk, buffer);
- ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
+ }
- if (!ok)
- return 0;
- nBytes = nBlocks * dev->chunkBitmapStride;
+ n -= nToCopy;
+ offset += nToCopy;
+ buffer += nToCopy;
+ nDone += nToCopy;
- ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
+ }
- return ok ? 1 : 0;
+ return nDone;
}
-static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
- yaffs_Object *obj)
+int yaffs_DoWriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
+ int nBytes, int writeThrough)
{
- cp->objectId = obj->objectId;
- cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
- cp->hdrChunk = obj->hdrChunk;
- cp->variantType = obj->variantType;
- cp->deleted = obj->deleted;
- cp->softDeleted = obj->softDeleted;
- cp->unlinked = obj->unlinked;
- cp->fake = obj->fake;
- cp->renameAllowed = obj->renameAllowed;
- cp->unlinkAllowed = obj->unlinkAllowed;
- cp->serial = obj->serial;
- cp->nDataChunks = obj->nDataChunks;
-
- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
- cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
- else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
- cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
-}
-
-static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
-{
+ 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_Object *parent;
+ yaffs_Device *dev;
- 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;
- }
+ dev = in->myDev;
- obj->objectId = cp->objectId;
+ while (n > 0 && chunkWritten >= 0) {
+ yaffs_AddrToChunk(dev, offset, &chunk, &start);
- 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;
+ 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));
}
- yaffs_AddObjectToDirectory(parent, obj);
- }
+ chunk++; /* File pos to chunk in file offset */
- 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;
+ /* OK now check for the curveball where the start and end are in
+ * the same chunk.
+ */
- 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 ((start + n) < dev->nDataBytesPerChunk) {
+ nToCopy = n;
- if (obj->hdrChunk > 0)
- obj->lazyLoaded = 1;
- return 1;
-}
+ /* 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;
-static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
- __u32 level, int chunkOffset)
-{
- int i;
- yaffs_Device *dev = in->myDev;
- int ok = 1;
- int tnodeSize = yaffs_CalcTnodeSize(dev);
+ if (nBytesRead > dev->nDataBytesPerChunk)
+ nBytesRead = dev->nDataBytesPerChunk;
- if (tn) {
- if (level > 0) {
+ nToWriteBack =
+ (nBytesRead >
+ (start + n)) ? nBytesRead : (start + n);
- for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
- if (tn->internal[i]) {
- ok = yaffs_CheckpointTnodeWorker(in,
- tn->internal[i],
- level - 1,
- (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
- }
- }
- } else if (level == 0) {
- __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
- ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
- if (ok)
- ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
+ if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
+ YBUG();
+
+ } else {
+ nToCopy = dev->nDataBytesPerChunk - start;
+ nToWriteBack = dev->nDataBytesPerChunk;
}
- }
- return ok;
+ if (nToCopy != dev->nDataBytesPerChunk || dev->param.inbandTags) {
+ /* An incomplete start or end chunk (or maybe both start and end chunk),
+ * or we're using inband tags, so we want to use the cache buffers.
+ */
+ if (dev->param.nShortOpCaches > 0) {
+ yaffs_ChunkCache *cache;
+ /* If we can't find the data in the cache, then load the cache */
+ cache = yaffs_FindChunkCache(in, chunk);
-}
+ if (!cache
+ && yaffs_CheckSpaceForAllocation(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;
+ }
-static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
-{
- __u32 endMarker = ~0;
- int ok = 1;
+ if (cache) {
+ yaffs_UseChunkCache(dev, cache, 1);
+ cache->locked = 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(&cache->data[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 = yaffs_CalcTnodeSize(dev);
- ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
+ cache->locked = 0;
+ cache->nBytes = nToWriteBack;
- while (ok && (~baseChunk)) {
- nread++;
- /* Read level 0 tnode */
+ 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.
+ */
- tn = yaffs_GetTnodeRaw(dev);
- if (tn)
- ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
- else
- ok = 0;
+ __u8 *localBuffer =
+ yaffs_GetTempBuffer(dev, __LINE__);
- if (tn && ok)
- ok = yaffs_AddOrFindLevel0Tnode(dev,
- fileStructPtr,
- baseChunk,
- tn) ? 1 : 0;
+ yaffs_ReadChunkDataFromObject(in, chunk,
+ localBuffer);
- if (ok)
- ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
- }
- T(YAFFS_TRACE_CHECKPOINT, (
- TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
- nread, baseChunk, ok));
+ memcpy(&localBuffer[start], buffer, nToCopy);
- return ok ? 1 : 0;
-}
+ chunkWritten =
+ yaffs_WriteChunkDataToObject(in, chunk,
+ localBuffer,
+ nToWriteBack,
+ 0);
+ yaffs_ReleaseTempBuffer(dev, localBuffer,
+ __LINE__);
-static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
-{
- yaffs_Object *obj;
- yaffs_CheckpointObject cp;
- int i;
- int ok = 1;
- struct ylist_head *lh;
+ }
+ } else {
+ /* A full chunk. Write directly from the supplied buffer. */
- /* Iterate through the objects in each hash entry,
- * dumping them to the checkpointing stream.
- */
- for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
- ylist_for_each(lh, &dev->objectBucket[i].list) {
- if (lh) {
- obj = ylist_entry(lh, yaffs_Object, hashLink);
- if (!obj->deferedFree) {
- yaffs_ObjectToCheckpointObject(&cp, obj);
- cp.structType = sizeof(cp);
- T(YAFFS_TRACE_CHECKPOINT, (
- TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %p" TENDSTR),
- cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, obj));
+ chunkWritten =
+ yaffs_WriteChunkDataToObject(in, chunk, buffer,
+ dev->nDataBytesPerChunk,
+ 0);
- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+ /* Since we've overwritten the cached data, we better invalidate it. */
+ yaffs_InvalidateChunkCache(in, chunk);
+ }
- if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
- ok = yaffs_WriteCheckpointTnodes(obj);
- }
- }
+ if (chunkWritten >= 0) {
+ n -= nToCopy;
+ offset += nToCopy;
+ buffer += nToCopy;
+ nDone += nToCopy;
}
+
}
- /* Dump end of list */
- memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
- cp.structType = sizeof(cp);
+ /* Update file object */
+
+ if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
+ in->variant.fileVariant.fileSize = (startOfWrite + nDone);
- if (ok)
- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+ in->dirty = 1;
- return ok ? 1 : 0;
+ return nDone;
}
-static int yaffs_ReadCheckpointObjects(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 ok = 1;
- int done = 0;
- yaffs_Object *hardList = NULL;
-
- while (ok && !done) {
- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
- if (cp.structType != sizeof(cp)) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
- cp.structType, (int)sizeof(cp), ok));
- ok = 0;
- }
+ yaffs2_HandleHole(in,offset);
+ return yaffs_DoWriteDataToFile(in,buffer,offset,nBytes,writeThrough);
+}
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
- cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
-
- if (ok && cp.objectId == ~0)
- done = 1;
- else if (ok) {
- obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
- if (obj) {
- ok = yaffs_CheckpointObjectToObject(obj, &cp);
- if (!ok)
- break;
- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
- ok = yaffs_ReadCheckpointTnodes(obj);
- } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
- obj->hardLinks.next =
- (struct ylist_head *) hardList;
- hardList = obj;
- }
- } else
- ok = 0;
- }
- }
- if (ok)
- yaffs_HardlinkFixup(dev, hardList);
- return ok ? 1 : 0;
-}
+/* ---------------------- File resizing stuff ------------------ */
-static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
+static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
{
- __u32 checkpointSum;
- int ok;
- yaffs_GetCheckpointSum(dev, &checkpointSum);
+ yaffs_Device *dev = in->myDev;
+ int oldFileSize = in->variant.fileVariant.fileSize;
- ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
+ int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
- if (!ok)
- return 0;
+ 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->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__);
+ }
+ }
+ }
- return 1;
}
-static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
+
+void yaffs_ResizeDown( yaffs_Object *obj, loff_t newSize)
{
- __u32 checkpointSum0;
- __u32 checkpointSum1;
- int ok;
+ int newFullChunks;
+ __u32 newSizeOfPartialChunk;
+ yaffs_Device *dev = obj->myDev;
- yaffs_GetCheckpointSum(dev, &checkpointSum0);
+ yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
- ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
+ yaffs_PruneResizedChunks(obj, newSize);
- if (!ok)
- return 0;
+ if (newSizeOfPartialChunk != 0) {
+ int lastChunk = 1 + newFullChunks;
+ __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
- if (checkpointSum0 != checkpointSum1)
- return 0;
+ /* Got to read and rewrite the last chunk with its new size and zero pad */
+ yaffs_ReadChunkDataFromObject(obj, lastChunk, localBuffer);
+ memset(localBuffer + newSizeOfPartialChunk, 0,
+ dev->nDataBytesPerChunk - newSizeOfPartialChunk);
- return 1;
+ yaffs_WriteChunkDataToObject(obj, lastChunk, localBuffer,
+ newSizeOfPartialChunk, 1);
+
+ yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
+ }
+
+ obj->variant.fileVariant.fileSize = newSize;
+
+ yaffs_PruneFileStructure(dev, &obj->variant.fileVariant);
}
-static int yaffs_WriteCheckpointData(yaffs_Device *dev)
+int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
{
- int ok = 1;
+ yaffs_Device *dev = in->myDev;
+ int oldFileSize = in->variant.fileVariant.fileSize;
- if (!yaffs_CheckpointRequired(dev)) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
- ok = 0;
- }
+ yaffs_FlushFilesChunkCache(in);
+ yaffs_InvalidateWholeChunkCache(in);
- if (ok)
- ok = yaffs_CheckpointOpen(dev, 1);
+ yaffs_CheckGarbageCollection(dev,0);
- 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 (in->variantType != YAFFS_OBJECT_TYPE_FILE)
+ return YAFFS_FAIL;
- if (ok)
- ok = yaffs_WriteCheckpointSum(dev);
+ 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);
+ }
- if (!yaffs_CheckpointClose(dev))
- ok = 0;
+ /* 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);
- if (ok)
- dev->isCheckpointed = 1;
- else
- dev->isCheckpointed = 0;
- return dev->isCheckpointed;
+ return YAFFS_OK;
}
-static int yaffs_ReadCheckpointData(yaffs_Device *dev)
+loff_t yaffs_GetFileSize(yaffs_Object *obj)
{
- int ok = 1;
+ YCHAR *alias = NULL;
+ obj = yaffs_GetEquivalentObject(obj);
- if (dev->param.skipCheckpointRead || !dev->param.isYaffs2) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" 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, 0); /* open for read */
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
- ok = yaffs_ReadCheckpointValidityMarker(dev, 1);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
- ok = yaffs_ReadCheckpointDevice(dev);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
- ok = yaffs_ReadCheckpointObjects(dev);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
- ok = yaffs_ReadCheckpointValidityMarker(dev, 0);
- }
- if (ok) {
- ok = yaffs_ReadCheckpointSum(dev);
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
- }
+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
- if (!yaffs_CheckpointClose(dev))
- ok = 0;
+ in->yst_mtime = Y_CURRENT_TIME;
- if (ok)
- dev->isCheckpointed = 1;
- else
- dev->isCheckpointed = 0;
+#endif
+ }
- return ok ? 1 : 0;
+ retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0, NULL) >=
+ 0) ? YAFFS_OK : YAFFS_FAIL;
+ }
+ } else {
+ retVal = YAFFS_OK;
+ }
-}
+ return retVal;
-static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
-{
- if (dev->isCheckpointed ||
- dev->blocksInCheckpoint > 0) {
- dev->isCheckpointed = 0;
- yaffs_CheckpointInvalidateStream(dev);
- }
- if (dev->param.markSuperBlockDirty)
- dev->param.markSuperBlockDirty(dev);
}
-
-int yaffs_CheckpointSave(yaffs_Device *dev)
+static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
{
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+ /* First off, invalidate the file's data in the cache, without flushing. */
+ yaffs_InvalidateWholeChunkCache(in);
- yaffs_VerifyObjects(dev);
- yaffs_VerifyBlocks(dev);
- yaffs_VerifyFreeChunks(dev);
+ 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 (!dev->isCheckpointed) {
- yaffs_InvalidateCheckpoint(dev);
- yaffs_WriteCheckpointData(dev);
}
- T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+ yaffs_RemoveObjectFromDirectory(in);
+ yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
+ in->hdrChunk = 0;
+
+ yaffs_FreeObject(in);
+ return YAFFS_OK;
- return dev->isCheckpointed;
}
-int yaffs_CheckpointRestore(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)
{
- int retval;
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
- retval = yaffs_ReadCheckpointData(dev);
+ int retVal;
+ int immediateDeletion = 0;
+ yaffs_Device *dev = in->myDev;
+
+ if (!in->myInode)
+ immediateDeletion = 1;
- if (dev->isCheckpointed) {
- yaffs_VerifyObjects(dev);
- yaffs_VerifyBlocks(dev);
- yaffs_VerifyFreeChunks(dev);
+ 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);
}
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
- return retval;
+ return retVal;
}
-/*--------------------- File read/write ------------------------
- * Read and write have very similar structures.
- * In general the read/write has three parts to it
- * An incomplete chunk to start with (if the read/write is not chunk-aligned)
- * Some complete chunks
- * An incomplete chunk to end off with
- *
- * Curve-balls: the first chunk might also be the last chunk.
- */
-
-int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
- int nBytes)
+int 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;
- int chunk;
- __u32 start;
- int nToCopy;
- int n = nBytes;
- int nDone = 0;
- yaffs_ChunkCache *cache;
-
- yaffs_Device *dev;
-
- dev = in->myDev;
-
- while (n > 0) {
- /* chunk = offset / dev->nDataBytesPerChunk + 1; */
- /* start = offset % dev->nDataBytesPerChunk; */
- yaffs_AddrToChunk(dev, offset, &chunk, &start);
- chunk++;
-
- /* OK now check for the curveball where the start and end are in
- * the same chunk.
- */
- if ((start + n) < dev->nDataBytesPerChunk)
- nToCopy = n;
- else
- nToCopy = dev->nDataBytesPerChunk - start;
-
- cache = yaffs_FindChunkCache(in, chunk);
-
- /* If the chunk is already in the cache or it is less than a whole chunk
- * or we're using inband tags then use the cache (if there is caching)
- * else bypass the cache.
- */
- if (cache || nToCopy != dev->nDataBytesPerChunk || dev->param.inbandTags) {
- if (dev->param.nShortOpCaches > 0) {
-
- /* If we can't find the data in the cache, then load it up. */
-
- if (!cache) {
- cache = yaffs_GrabChunkCache(in->myDev);
- cache->object = in;
- cache->chunkId = chunk;
- cache->dirty = 0;
- cache->locked = 0;
- yaffs_ReadChunkDataFromObject(in, chunk,
- cache->
- data);
- cache->nBytes = 0;
- }
-
- yaffs_UseChunkCache(dev, cache, 0);
-
- cache->locked = 1;
-
-
- 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_DoWriteDataToFile(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) {
- 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++; /* File pos to chunk in file offset */
-
- /* 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->param.inbandTags) {
- /* An incomplete start or end chunk (or maybe both start and end chunk),
- * or we're using inband tags, so we want to use the cache buffers.
- */
- if (dev->param.nShortOpCaches > 0) {
- yaffs_ChunkCache *cache;
- /* If we can't find the data in the cache, then load the cache */
- cache = yaffs_FindChunkCache(in, chunk);
-
- if (!cache
- && yaffs_CheckSpaceForAllocation(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;
-
-
- 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;
-}
-
-int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
- int nBytes, int writeThrough)
-{
- yaffs_HandleHole(in,offset);
- return yaffs_DoWriteDataToFile(in,buffer,offset,nBytes,writeThrough);
-}
-
-
-
-/* ---------------------- File resizing stuff ------------------ */
-
-static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
-{
-
- 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->param.nChunksPerBlock)
- || chunkId >=
- ((dev->internalEndBlock +
- 1) * dev->param.nChunksPerBlock)) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("Found daft chunkId %d for %d" TENDSTR),
- chunkId, i));
- } else {
- in->nDataChunks--;
- yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
- }
- }
- }
-
-}
-
-
-static void yaffs_ResizeDown( yaffs_Object *obj, loff_t newSize)
-{
- int newFullChunks;
- __u32 newSizeOfPartialChunk;
- yaffs_Device *dev = obj->myDev;
-
- yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
-
- yaffs_PruneResizedChunks(obj, 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(obj, lastChunk, localBuffer);
- memset(localBuffer + newSizeOfPartialChunk, 0,
- dev->nDataBytesPerChunk - newSizeOfPartialChunk);
-
- yaffs_WriteChunkDataToObject(obj, lastChunk, localBuffer,
- newSizeOfPartialChunk, 1);
-
- yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
- }
-
- obj->variant.fileVariant.fileSize = newSize;
-
- yaffs_PruneFileStructure(dev, &obj->variant.fileVariant);
-}
-
-
-static int yaffs_HandleHole(yaffs_Object *obj, loff_t newSize)
-{
- /* if newsSize > oldFileSize.
- * We're going to be writing a hole.
- * If the hole is small then write zeros otherwise write a start of hole marker.
- */
-
-
- loff_t oldFileSize;
- int increase;
- int smallHole ;
- int result = YAFFS_OK;
- yaffs_Device *dev = NULL;
-
- __u8 *localBuffer = NULL;
-
- int smallIncreaseOk = 0;
-
- if(!obj)
- return YAFFS_FAIL;
-
- if(obj->variantType != YAFFS_OBJECT_TYPE_FILE)
- return YAFFS_FAIL;
-
- dev = obj->myDev;
-
- /* Bail out if not yaffs2 mode */
- if(!dev->param.isYaffs2)
- return YAFFS_OK;
-
- oldFileSize = obj->variant.fileVariant.fileSize;
-
- if (newSize <= oldFileSize)
- return YAFFS_OK;
-
- increase = newSize - oldFileSize;
-
- if(increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->nDataBytesPerChunk &&
- yaffs_CheckSpaceForAllocation(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1))
- smallHole = 1;
- else
- smallHole = 0;
-
- if(smallHole)
- localBuffer= yaffs_GetTempBuffer(dev, __LINE__);
-
- if(localBuffer){
- /* fill hole with zero bytes */
- int pos = oldFileSize;
- int thisWrite;
- int written;
- memset(localBuffer,0,dev->nDataBytesPerChunk);
- smallIncreaseOk = 1;
-
- while(increase > 0 && smallIncreaseOk){
- thisWrite = increase;
- if(thisWrite > dev->nDataBytesPerChunk)
- thisWrite = dev->nDataBytesPerChunk;
- written = yaffs_DoWriteDataToFile(obj,localBuffer,pos,thisWrite,0);
- if(written == thisWrite){
- pos += thisWrite;
- increase -= thisWrite;
- } else
- smallIncreaseOk = 0;
- }
-
- yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
-
- /* If we were out of space then reverse any chunks we've added */
- if(!smallIncreaseOk)
- yaffs_ResizeDown(obj, oldFileSize);
- }
-
- if (!smallIncreaseOk &&
- obj->parent &&
- obj->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
- obj->parent->objectId != YAFFS_OBJECTID_DELETED){
- /* Write a hole start header with the old file size */
- yaffs_UpdateObjectHeader(obj, NULL, 0,1,0);
- }
-
- return result;
-
-}
-
-int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
-{
- yaffs_Device *dev = in->myDev;
- int oldFileSize = in->variant.fileVariant.fileSize;
-
- yaffs_FlushFilesChunkCache(in);
- yaffs_InvalidateWholeChunkCache(in);
-
- yaffs_CheckGarbageCollection(dev,0);
-
- if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
- return YAFFS_FAIL;
-
- if (newSize == oldFileSize)
- return YAFFS_OK;
-
- if(newSize > oldFileSize){
- yaffs_HandleHole(in,newSize);
- in->variant.fileVariant.fileSize = newSize;
- } else {
- /* newSize < oldFileSize */
- yaffs_ResizeDown(in, newSize);
- }
-
- /* Write a new object header to reflect the resize.
- * show we've shrunk the file, if need be
- * Do this only if the file is not in the deleted directories
- * 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);
-
-
- 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_strnlen(alias,YAFFS_MAX_ALIAS_LENGTH);
- 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->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);
-
- }
-
- 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;
- 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);
- }
-
-
- return retVal;
-}
-
-int yaffs_DeleteFile(yaffs_Object *in)
-{
- int retVal = YAFFS_OK;
- int deleted = in->deleted;
- yaffs_Device *dev = in->myDev;
-
- if (dev->param.disableSoftDelete || dev->param.isYaffs2)
- yaffs_ResizeFile(in, 0);
-
- if (in->nDataChunks > 0) {
- /* Use soft deletion if there is data in the file.
- * That won't be the case if it has been resized to zero.
- */
- if (!in->unlinked)
- retVal = yaffs_UnlinkFileIfNeeded(in);
-
- 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:
- 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. */
- }
-
- return retVal;
-}
-
-static int yaffs_UnlinkWorker(yaffs_Object *obj)
-{
-
- int immediateDeletion = 0;
-
- if (!obj->myInode)
- immediateDeletion = 1;
-
- if(obj)
- yaffs_UpdateParent(obj->parent);
-
- if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
- return yaffs_DeleteHardLink(obj);
- } else if (!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
- */
-
- yaffs_Object *hl;
- yaffs_Object *parent;
- int retVal;
- YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
-
- hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
-
- yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
- parent = hl->parent;
-
- ylist_del_init(&hl->hardLinks);
-
- yaffs_AddObjectToDirectory(obj->myDev->unlinkedDir, hl);
-
- retVal = yaffs_ChangeObjectName(obj,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:
- ylist_del_init(&obj->variant.directoryVariant.dirty);
- return yaffs_DeleteDirectory(obj);
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- return yaffs_DeleteSymLink(obj);
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- return yaffs_DoGenericObjectDeletion(obj);
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- default:
- return YAFFS_FAIL;
- }
- } else if(yaffs_IsNonEmptyDirectory(obj))
- return YAFFS_FAIL;
- else
- return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
- _Y("unlinked"), 0, 0);
-}
-
-
-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 */
- bi = dev->blockInfo;
- for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
- yaffs_ClearChunkBits(dev, blk);
- bi->pagesInUse = 0;
- bi->softDeletions = 0;
-
- yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
-
- bi->blockState = state;
- bi->sequenceNumber = sequenceNumber;
-
- if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
- bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
-
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
- state, sequenceNumber));
-
- if (state == YAFFS_BLOCK_STATE_DEAD) {
- T(YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("block %d is bad" TENDSTR), blk));
- } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block empty " TENDSTR)));
- dev->nErasedBlocks++;
- dev->nFreeChunks += dev->param.nChunksPerBlock;
- }
- bi++;
- }
-
- startIterator = dev->internalStartBlock;
- endIterator = dev->internalEndBlock;
-
- /* For each block.... */
- for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
- blockIterator++) {
-
- YYIELD();
-
- YYIELD();
-
- blk = blockIterator;
-
- bi = yaffs_GetBlockInfo(dev, blk);
- state = bi->blockState;
-
- deleted = 0;
-
- /* For each chunk in each block that needs scanning....*/
- for (c = 0; !alloc_failed && c < dev->param.nChunksPerBlock &&
- state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
- /* Read the tags and decide what to do */
- chunk = blk * dev->param.nChunksPerBlock + c;
-
- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
- &tags);
-
- /* Let's have a good look at this chunk... */
-
- if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
- /* YAFFS1 only...
- * A deleted chunk
- */
- deleted++;
- dev->nFreeChunks++;
- /*T((" %d %d deleted\n",blk,c)); */
- } else if (!tags.chunkUsed) {
- /* An unassigned chunk in the block
- * This means that either the block is empty or
- * this is the one being allocated from
- */
-
- if (c == 0) {
- /* We're looking at the first chunk in the block so the block is unused */
- state = YAFFS_BLOCK_STATE_EMPTY;
- dev->nErasedBlocks++;
- } else {
- /* this is the block being allocated from */
- T(YAFFS_TRACE_SCAN,
- (TSTR
- (" Allocating from %d %d" TENDSTR),
- blk, c));
- state = YAFFS_BLOCK_STATE_ALLOCATING;
- dev->allocationBlock = blk;
- dev->allocationPage = c;
- dev->allocationBlockFinder = blk;
- /* Set block finder here to encourage the allocator to go forth from here. */
-
- }
-
- dev->nFreeChunks += (dev->param.nChunksPerBlock - c);
- } else if (tags.chunkId > 0) {
- /* chunkId > 0 so it is a data chunk... */
- unsigned int endpos;
-
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
-
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.
- objectId,
- YAFFS_OBJECT_TYPE_FILE);
- /* PutChunkIntoFile checks for a clash (two data chunks with
- * the same chunkId).
- */
-
- if (!in)
- alloc_failed = 1;
-
- if (in) {
- if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
- alloc_failed = 1;
- }
-
- endpos =
- (tags.chunkId - 1) * dev->nDataBytesPerChunk +
- tags.byteCount;
- if (in &&
- in->variantType == YAFFS_OBJECT_TYPE_FILE
- && in->variant.fileVariant.scannedFileSize <
- endpos) {
- in->variant.fileVariant.
- scannedFileSize = endpos;
- if (!dev->param.useHeaderFileSize) {
- in->variant.fileVariant.
- fileSize =
- in->variant.fileVariant.
- scannedFileSize;
- }
-
- }
- /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
- } else {
- /* chunkId == 0, so it is an ObjectHeader.
- * Thus, we read in the object header and make the object
- */
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
-
- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
- chunkData,
- NULL);
-
- oh = (yaffs_ObjectHeader *) chunkData;
-
- in = yaffs_FindObjectByNumber(dev,
- tags.objectId);
- if (in && in->variantType != oh->type) {
- /* This should not happen, but somehow
- * Wev'e ended up with an objectId that has been reused but not yet
- * deleted, and worse still it has changed type. Delete the old object.
- */
-
- yaffs_DeleteObject(in);
-
- in = 0;
- }
-
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.
- objectId,
- oh->type);
-
- if (!in)
- alloc_failed = 1;
-
- if (in && oh->shadowsObject > 0) {
-
- struct yaffs_ShadowFixerStruct *fixer;
- fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
- if (fixer) {
- fixer->next = shadowFixerList;
- shadowFixerList = fixer;
- fixer->objectId = tags.objectId;
- fixer->shadowedId = oh->shadowsObject;
- }
-
- }
-
- 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->param.useHeaderFileSize)
-
- in->variant.fileVariant.
- fileSize =
- oh->fileSize;
-
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- in->variant.hardLinkVariant.
- equivalentObjectId =
- oh->equivalentObjectId;
- in->hardLinks.next =
- (struct ylist_head *)
- hardList;
- hardList = in;
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- in->variant.symLinkVariant.alias =
- yaffs_CloneString(oh->alias);
- if (!in->variant.symLinkVariant.alias)
- alloc_failed = 1;
- break;
- }
-
- }
- }
- }
-
- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- /* If we got this far while scanning, then the block is fully allocated.*/
- state = YAFFS_BLOCK_STATE_FULL;
- }
-
- if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
- /* If the block was partially allocated then treat it as fully allocated.*/
- state = YAFFS_BLOCK_STATE_FULL;
- dev->allocationBlock = -1;
- }
-
- bi->blockState = state;
-
- /* Now let's see if it was dirty */
- if (bi->pagesInUse == 0 &&
- !bi->hasShrinkHeader &&
- bi->blockState == YAFFS_BLOCK_STATE_FULL) {
- yaffs_BlockBecameDirty(dev, blk);
- }
-
- }
-
-
- /* Ok, we've done all the scanning.
- * Fix up the hard link chains.
- * We should now have scanned all the objects, now it's time to add these
- * hardlinks.
- */
-
- yaffs_HardlinkFixup(dev, hardList);
-
- /* Fix up any shadowed objects */
- {
- struct yaffs_ShadowFixerStruct *fixer;
- yaffs_Object *obj;
-
- while (shadowFixerList) {
- fixer = shadowFixerList;
- shadowFixerList = fixer->next;
- /* Complete the rename transaction by deleting the shadowed object
- * then setting the object header to unshadowed.
- */
- obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
- if (obj)
- yaffs_DeleteObject(obj);
-
- obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
-
- if (obj)
- yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
-
- 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
-
- if (in->lazyLoaded && in->hdrChunk > 0) {
- in->lazyLoaded = 0;
- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
-
- result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
- oh = (yaffs_ObjectHeader *) chunkData;
-
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
-
-#endif
- yaffs_SetObjectName(in, oh->name);
-
- if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
- in->variant.symLinkVariant.alias =
- yaffs_CloneString(oh->alias);
- if (!in->variant.symLinkVariant.alias)
- alloc_failed = 1; /* Not returned to caller */
- }
-
- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
- }
-}
-
-static int yaffs_ScanBackwards(yaffs_Device *dev)
-{
- yaffs_ExtendedTags tags;
- int blk;
- int blockIterator;
- int startIterator;
- int endIterator;
- int nBlocksToScan = 0;
-
- int chunk;
- int result;
- int c;
- int deleted;
- yaffs_BlockState state;
- yaffs_Object *hardList = NULL;
- yaffs_BlockInfo *bi;
- __u32 sequenceNumber;
- yaffs_ObjectHeader *oh;
- yaffs_Object *in;
- yaffs_Object *parent;
- int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
- int itsUnlinked;
- __u8 *chunkData;
-
- int fileSize;
- int isShrink;
- int foundChunksInBlock;
- int equivalentObjectId;
- int alloc_failed = 0;
-
-
- yaffs_BlockIndex *blockIndex = NULL;
- int altBlockIndex = 0;
-
- if (!dev->param.isYaffs2) {
- T(YAFFS_TRACE_SCAN,
- (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
- return YAFFS_FAIL;
- }
-
- T(YAFFS_TRACE_SCAN,
- (TSTR
- ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
- TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
-
-
- dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
-
- blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
-
- if (!blockIndex) {
- blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
- altBlockIndex = 1;
- }
-
- if (!blockIndex) {
- T(YAFFS_TRACE_SCAN,
- (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
- return YAFFS_FAIL;
- }
-
- dev->blocksInCheckpoint = 0;
-
- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
-
- /* Scan all the blocks to determine their state */
- bi = dev->blockInfo;
- for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
- yaffs_ClearChunkBits(dev, blk);
- bi->pagesInUse = 0;
- bi->softDeletions = 0;
-
- yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
-
- bi->blockState = state;
- bi->sequenceNumber = sequenceNumber;
-
- if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
- bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
- if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
- bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
-
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
- state, sequenceNumber));
-
-
- if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
- dev->blocksInCheckpoint++;
-
- } else if (state == YAFFS_BLOCK_STATE_DEAD) {
- T(YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("block %d is bad" TENDSTR), blk));
- } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block empty " TENDSTR)));
- dev->nErasedBlocks++;
- dev->nFreeChunks += dev->param.nChunksPerBlock;
- } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
-
- /* Determine the highest sequence number */
- if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
- sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
-
- blockIndex[nBlocksToScan].seq = sequenceNumber;
- blockIndex[nBlocksToScan].block = blk;
-
- nBlocksToScan++;
-
- if (sequenceNumber >= dev->sequenceNumber)
- dev->sequenceNumber = sequenceNumber;
- } else {
- /* TODO: Nasty sequence number! */
- T(YAFFS_TRACE_SCAN,
- (TSTR
- ("Block scanning block %d has bad sequence number %d"
- TENDSTR), blk, sequenceNumber));
-
- }
- }
- bi++;
- }
-
- T(YAFFS_TRACE_SCAN,
- (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
-
+ if (dev->param.disableSoftDelete || dev->param.isYaffs2)
+ yaffs_ResizeFile(in, 0);
+ if (in->nDataChunks > 0) {
+ /* Use soft deletion if there is data in the file.
+ * That won't be the case if it has been resized to zero.
+ */
+ if (!in->unlinked)
+ retVal = yaffs_UnlinkFileIfNeeded(in);
- YYIELD();
+ deleted = in->deleted;
- /* Sort the blocks */
-#ifndef CONFIG_YAFFS_USE_OWN_SORT
- {
- /* Use qsort now. */
- yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
- }
-#else
- {
- /* Dungy old bubble sort... */
+ 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);
- 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;
- }
+ return YAFFS_OK;
}
-#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->param.nChunksPerBlock - 1;
- !alloc_failed && c >= 0 &&
- (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
- state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
- /* Scan backwards...
- * Read the tags and decide what to do
- */
-
- chunk = blk * dev->param.nChunksPerBlock + c;
-
- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
- &tags);
-
- /* Let's have a good look at this chunk... */
-
- if (!tags.chunkUsed) {
- /* An unassigned chunk in the block.
- * If there are used chunks after this one, then
- * it is a chunk that was skipped due to failing the erased
- * check. Just skip it so that it can be deleted.
- * But, more typically, We get here when this is an unallocated
- * chunk and his means that either the block is empty or
- * this is the one being allocated from
- */
-
- if (foundChunksInBlock) {
- /* This is a chunk that was skipped due to failing the erased check */
- } else if (c == 0) {
- /* We're looking at the first chunk in the block so the block is unused */
- state = YAFFS_BLOCK_STATE_EMPTY;
- dev->nErasedBlocks++;
- } else {
- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
- state == YAFFS_BLOCK_STATE_ALLOCATING) {
- if (dev->sequenceNumber == bi->sequenceNumber) {
- /* this is the block being allocated from */
-
- T(YAFFS_TRACE_SCAN,
- (TSTR
- (" Allocating from %d %d"
- TENDSTR), blk, c));
-
- state = YAFFS_BLOCK_STATE_ALLOCATING;
- dev->allocationBlock = blk;
- dev->allocationPage = c;
- dev->allocationBlockFinder = blk;
- } else {
- /* This is a partially written block that is not
- * the current allocation block.
- */
-
- T(YAFFS_TRACE_SCAN,
- (TSTR("Partially written block %d detected" TENDSTR),
- blk));
- }
- }
- }
-
- dev->nFreeChunks++;
-
- } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
- T(YAFFS_TRACE_SCAN,
- (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
- blk, c));
-
- dev->nFreeChunks++;
+}
- } else if (tags.chunkId > 0) {
- /* chunkId > 0 so it is a data chunk... */
- unsigned int endpos;
- __u32 chunkBase =
- (tags.chunkId - 1) * dev->nDataBytesPerChunk;
+static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj)
+{
+ return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) &&
+ !(ylist_empty(&obj->variant.directoryVariant.children));
+}
- foundChunksInBlock = 1;
+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);
+}
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
+static int yaffs_DeleteSymLink(yaffs_Object *in)
+{
+ if(in->variant.symLinkVariant.alias)
+ YFREE(in->variant.symLinkVariant.alias);
+ in->variant.symLinkVariant.alias=NULL;
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.
- objectId,
- YAFFS_OBJECT_TYPE_FILE);
- if (!in) {
- /* Out of memory */
- alloc_failed = 1;
- }
+ return yaffs_DoGenericObjectDeletion(in);
+}
- 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;
- }
+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);
+}
- /* File size is calculated by looking at the data chunks if we have not
- * seen an object header yet. Stop this practice once we find an object header.
- */
- endpos = chunkBase + tags.byteCount;
+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. */
+ }
- if (!in->valid && /* have not got an object header yet */
- in->variant.fileVariant.scannedFileSize < endpos) {
- in->variant.fileVariant.scannedFileSize = endpos;
- in->variant.fileVariant.fileSize = endpos;
- }
+ return retVal;
+}
- } else if (in) {
- /* This chunk has been invalidated by a resize, or a past file deletion
- * so delete the chunk*/
- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+static int yaffs_UnlinkWorker(yaffs_Object *obj)
+{
- }
- } else {
- /* chunkId == 0, so it is an ObjectHeader.
- * Thus, we read in the object header and make the object
- */
- foundChunksInBlock = 1;
+ int immediateDeletion = 0;
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
+ if (!obj->myInode)
+ immediateDeletion = 1;
- oh = NULL;
- in = NULL;
+ if(obj)
+ yaffs_UpdateParent(obj->parent);
- if (tags.extraHeaderInfoAvailable) {
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.objectId,
- tags.extraObjectType);
- if (!in)
- alloc_failed = 1;
- }
+ if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
+ return yaffs_DeleteHardLink(obj);
+ } else if (!ylist_empty(&obj->hardLinks)) {
+ /* Curve ball: We're unlinking an object that has a hardlink.
+ *
+ * This problem arises because we are not strictly following
+ * The Linux link/inode model.
+ *
+ * We can't really delete the object.
+ * Instead, we do the following:
+ * - Select a hardlink.
+ * - Unhook it from the hard links
+ * - Move it from its parent directory (so that the rename can work)
+ * - Rename the object to the hardlink's name.
+ * - Delete the hardlink
+ */
- if (!in ||
- (!in->valid && dev->param.disableLazyLoad) ||
- tags.extraShadows ||
- (!in->valid &&
- (tags.objectId == YAFFS_OBJECTID_ROOT ||
- tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
+ yaffs_Object *hl;
+ yaffs_Object *parent;
+ int retVal;
+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
- /* 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.
- */
+ hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
- result = yaffs_ReadChunkWithTagsFromNAND(dev,
- chunk,
- chunkData,
- NULL);
+ yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
+ parent = hl->parent;
- oh = (yaffs_ObjectHeader *) chunkData;
+ ylist_del_init(&hl->hardLinks);
- if (dev->param.inbandTags) {
- /* Fix up the header if they got corrupted by inband tags */
- oh->shadowsObject = oh->inbandShadowsObject;
- oh->isShrink = oh->inbandIsShrink;
- }
+ yaffs_AddObjectToDirectory(obj->myDev->unlinkedDir, hl);
- if (!in) {
- in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
- if (!in)
- alloc_failed = 1;
- }
+ retVal = yaffs_ChangeObjectName(obj,parent, name, 0, 0);
- }
+ if (retVal == YAFFS_OK)
+ retVal = yaffs_DoGenericObjectDeletion(hl);
- 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;
- }
+ return retVal;
- 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.
- */
+ } else if (immediateDeletion) {
+ switch (obj->variantType) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ return yaffs_DeleteFile(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ ylist_del_init(&obj->variant.directoryVariant.dirty);
+ return yaffs_DeleteDirectory(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ return yaffs_DeleteSymLink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ return yaffs_DoGenericObjectDeletion(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ default:
+ return YAFFS_FAIL;
+ }
+ } else if(yaffs_IsNonEmptyDirectory(obj))
+ return YAFFS_FAIL;
+ else
+ return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
+ _Y("unlinked"), 0, 0);
+}
- if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
- ((oh &&
- oh->type == YAFFS_OBJECT_TYPE_FILE) ||
- (tags.extraHeaderInfoAvailable &&
- tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
- __u32 thisSize =
- (oh) ? oh->fileSize : tags.
- extraFileLength;
- __u32 parentObjectId =
- (oh) ? oh->
- parentObjectId : tags.
- extraParentObjectId;
-
-
- isShrink =
- (oh) ? oh->isShrink : tags.
- extraIsShrinkHeader;
-
- /* If it is deleted (unlinked at start also means deleted)
- * we treat the file size as being zeroed at this point.
- */
- if (parentObjectId ==
- YAFFS_OBJECTID_DELETED
- || parentObjectId ==
- YAFFS_OBJECTID_UNLINKED) {
- thisSize = 0;
- isShrink = 1;
- }
- if (isShrink && in->variant.fileVariant.shrinkSize > thisSize)
- in->variant.fileVariant.shrinkSize = thisSize;
+static int yaffs_UnlinkObject(yaffs_Object *obj)
+{
- if (isShrink)
- bi->hasShrinkHeader = 1;
+ if (obj && obj->unlinkAllowed)
+ return yaffs_UnlinkWorker(obj);
- }
- /* Use existing - destroy this one. */
- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+ return YAFFS_FAIL;
- }
+}
+int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
+{
+ yaffs_Object *obj;
- 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;
+ obj = yaffs_FindObjectByName(dir, name);
+ return yaffs_UnlinkObject(obj);
+}
-#endif
- } else {
- in->variantType = tags.extraObjectType;
- in->lazyLoaded = 1;
- }
+/*----------------------- Initialisation Scanning ---------------------- */
- in->hdrChunk = chunk;
+void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
+ int backwardScanning)
+{
+ yaffs_Object *obj;
- } else if (!in->valid) {
- /* we need to load this info */
+ if (!backwardScanning) {
+ /* Handle YAFFS1 forward scanning case
+ * For YAFFS1 we always do the deletion
+ */
- in->valid = 1;
- in->hdrChunk = chunk;
+ } else {
+ /* Handle YAFFS2 case (backward scanning)
+ * If the shadowed object exists then ignore.
+ */
+ obj = yaffs_FindObjectByNumber(dev, objId);
+ if(obj)
+ return;
+ }
- if (oh) {
- in->variantType = oh->type;
+ /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
+ * We put it in unlinked dir to be cleaned up after the scanning
+ */
+ obj =
+ yaffs_FindOrCreateObjectByNumber(dev, objId,
+ YAFFS_OBJECT_TYPE_FILE);
+ if (!obj)
+ return;
+ obj->isShadowed = 1;
+ yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
+ obj->variant.fileVariant.shrinkSize = 0;
+ obj->valid = 1; /* So that we don't read any other info for this file */
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
-#endif
+}
- if (oh->shadowsObject > 0)
- yaffs_HandleShadowedObject(dev,
- oh->
- shadowsObject,
- 1);
-
+void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
+{
+ yaffs_Object *hl;
+ yaffs_Object *in;
- yaffs_SetObjectName(in, oh->name);
- parent =
- yaffs_FindOrCreateObjectByNumber
- (dev, oh->parentObjectId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
+ while (hardList) {
+ hl = hardList;
+ hardList = (yaffs_Object *) (hardList->hardLinks.next);
- fileSize = oh->fileSize;
- isShrink = oh->isShrink;
- equivalentObjectId = oh->equivalentObjectId;
+ in = yaffs_FindObjectByNumber(dev,
+ hl->variant.hardLinkVariant.
+ 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;
+ if (in) {
+ /* Add the hardlink pointers */
+ hl->variant.hardLinkVariant.equivalentObject = in;
+ ylist_add(&hl->hardLinks, &in->hardLinks);
+ } else {
+ /* Todo Need to report/handle this better.
+ * Got a problem... hardlink to a non-existant object
+ */
+ hl->variant.hardLinkVariant.equivalentObject = NULL;
+ YINIT_LIST_HEAD(&hl->hardLinks);
- }
- in->dirty = 0;
+ }
+ }
+}
- if (!parent)
- alloc_failed = 1;
- /* directory stuff...
- * hook up to parent
- */
+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;
- 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
- */
+ /* 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);
+ }
+ }
- 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;
- }
+ ylist_for_each_safe(i, n,
+ &dev->deletedDir->variant.directoryVariant.children) {
+ if (i) {
+ l = ylist_entry(i, yaffs_Object, siblings);
+ yaffs_DeleteObject(l);
+ }
+ }
- yaffs_AddObjectToDirectory(parent, in);
+}
- itsUnlinked = (parent == dev->deletedDir) ||
- (parent == dev->unlinkedDir);
+/*
+ * 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);
+}
- if (isShrink) {
- /* Mark the block as having a shrinkHeader */
- bi->hasShrinkHeader = 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;
- /* Note re hardlinks.
- * Since we might scan a hardlink before its equivalent object is scanned
- * we put them all in a list.
- * After scanning is complete, we should have all the objects, so we run
- * through this list and fix up all the chains.
- */
- switch (in->variantType) {
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* Todo got a problem */
- break;
- case YAFFS_OBJECT_TYPE_FILE:
-
- if (in->variant.fileVariant.
- scannedFileSize < fileSize) {
- /* This covers the case where the file size is greater
- * than where the data is
- * This will happen if the file is resized to be larger
- * than its current data extents.
- */
- in->variant.fileVariant.fileSize = fileSize;
- in->variant.fileVariant.scannedFileSize = fileSize;
- }
+ /* Iterate through the objects in each hash entry,
+ * looking at each object.
+ * Make sure it is rooted.
+ */
- if (in->variant.fileVariant.shrinkSize > fileSize)
- in->variant.fileVariant.shrinkSize = fileSize;
+ 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;
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- if (!itsUnlinked) {
- in->variant.hardLinkVariant.equivalentObjectId =
- equivalentObjectId;
- in->hardLinks.next =
- (struct ylist_head *) hardList;
- hardList = in;
- }
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- if (oh) {
- in->variant.symLinkVariant.alias =
- yaffs_CloneString(oh->alias);
- if (!in->variant.symLinkVariant.alias)
- alloc_failed = 1;
- }
- break;
+ while(parent != dev->rootDir &&
+ parent->parent &&
+ parent->parent->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+ depthLimit > 0){
+ parent = parent->parent;
+ depthLimit--;
}
-
+ if(parent != dev->rootDir)
+ hanging = 1;
+ }
+ if(hanging){
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("Hanging object %d moved to lost and found" TENDSTR),
+ obj->objectId));
+ yaffs_AddObjectToDirectory(dev->lostNFoundDir,obj);
}
-
}
+ }
+ }
+}
- } /* End of scanning for each chunk */
- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- /* If we got this far while scanning, then the block is fully allocated. */
- state = YAFFS_BLOCK_STATE_FULL;
- }
+/*
+ * Delete directory contents for cleaning up lost and found.
+ */
+static void yaffs_DeleteDirectoryContents(yaffs_Object *dir)
+{
+ yaffs_Object *obj;
+ struct ylist_head *lh;
+ struct ylist_head *n;
+ 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);
- bi->blockState = state;
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("Deleting lost_found object %d" TENDSTR),
+ obj->objectId));
- /* Now let's see if it was dirty */
- if (bi->pagesInUse == 0 &&
- !bi->hasShrinkHeader &&
- bi->blockState == YAFFS_BLOCK_STATE_FULL) {
- yaffs_BlockBecameDirty(dev, blk);
+ /* Need to use UnlinkObject since Delete would not handle
+ * hardlinked objects correctly.
+ */
+ yaffs_UnlinkObject(obj);
}
-
}
-
- yaffs_SkipRestOfBlock(dev);
+
+}
- if (altBlockIndex)
- YFREE_ALT(blockIndex);
- else
- YFREE(blockIndex);
+static void yaffs_EmptyLostAndFound(yaffs_Device *dev)
+{
+ yaffs_DeleteDirectoryContents(dev->lostNFoundDir);
+}
- /* Ok, we've done all the scanning.
- * Fix up the hard link chains.
- * We should now have scanned all the objects, now it's time to add these
- * hardlinks.
- */
- yaffs_HardlinkFixup(dev, hardList);
+static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
+{
+ __u8 *chunkData;
+ yaffs_ObjectHeader *oh;
+ yaffs_Device *dev;
+ yaffs_ExtendedTags tags;
+ int result;
+ int alloc_failed = 0;
+ if (!in)
+ return;
- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+ dev = in->myDev;
- if (alloc_failed)
- return YAFFS_FAIL;
+#if 0
+ T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
+ in->objectId,
+ in->lazyLoaded ? "not yet" : "already"));
+#endif
- T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
+ if (in->lazyLoaded && in->hdrChunk > 0) {
+ in->lazyLoaded = 0;
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
- return YAFFS_OK;
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
+ oh = (yaffs_ObjectHeader *) chunkData;
+
+ in->yst_mode = oh->yst_mode;
+#ifdef CONFIG_YAFFS_WINCE
+ in->win_atime[0] = oh->win_atime[0];
+ in->win_ctime[0] = oh->win_ctime[0];
+ in->win_mtime[0] = oh->win_mtime[0];
+ in->win_atime[1] = oh->win_atime[1];
+ in->win_ctime[1] = oh->win_ctime[1];
+ in->win_mtime[1] = oh->win_mtime[1];
+#else
+ in->yst_uid = oh->yst_uid;
+ in->yst_gid = oh->yst_gid;
+ in->yst_atime = oh->yst_atime;
+ in->yst_mtime = oh->yst_mtime;
+ in->yst_ctime = oh->yst_ctime;
+ in->yst_rdev = oh->yst_rdev;
+
+#endif
+ yaffs_SetObjectName(in, oh->name);
+
+ if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
+ in->variant.symLinkVariant.alias =
+ yaffs_CloneString(oh->alias);
+ if (!in->variant.symLinkVariant.alias)
+ alloc_failed = 1; /* Not returned to caller */
+ }
+
+ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+ }
}
/*------------------------------ Directory Functions ----------------------------- */
}
} else
- yaffs_UpdateObjectHeader(obj,NULL,0,0,0);
+ yaffs_UpdateObjectHeader(obj, NULL, 0, 0, 0, NULL);
}
void yaffs_UpdateDirtyDirectories(yaffs_Device *dev)
T(YAFFS_TRACE_BACKGROUND, (TSTR("Update directory %d" TENDSTR), obj->objectId));
if(obj->dirty)
- yaffs_UpdateObjectHeader(obj,NULL,0,0,0);
+ yaffs_UpdateObjectHeader(obj, NULL, 0, 0, 0, NULL);
}
}
yaffs_VerifyDirectory(parent);
}
-static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
+void yaffs_AddObjectToDirectory(yaffs_Object *directory,
yaffs_Object *obj)
{
if (!directory) {
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)
{
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 (!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->param.isYaffs2) {
- if (yaffs_CheckpointRestore(dev)) {
+ 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;
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);
/* 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);
+ yaffs_DeinitialiseTnodesAndObjects(dev);
if (dev->param.nShortOpCaches > 0 &&
dev->srCache) {
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->param.nChunksPerBlock);
static int yaffs_freeVerificationFailures;
-static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
+void yaffs_VerifyFreeChunks(yaffs_Device *dev)
{
int counted;
int difference;
projects / yaffs2.git / blobdiff