#include "yaffs_getblockinfo.h"
#include "yaffs_tagscompat.h"
-#include "yaffs_qsort.h"
#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"
#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"
-/* Private structure for doing xattr modifications */
-typedef struct {
- int set; /* If 0 then this is a deletion */
- const char *name;
- const void *data;
- int size;
- int flags;
- int result;
-} yaffs_XAttrMod;
+
/* Robustification (if it ever comes about...) */
static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND);
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, yaffs_XAttrMod *xop);
+
+
static int yaffs_ApplyXMod(yaffs_Device *dev, char *buffer, yaffs_XAttrMod *xmod);
static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
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 yaffs2_InvalidateCheckpoint(yaffs_Device *dev);
-
static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
yaffs_ExtendedTags *tags);
yaffs_FileStructure *fStruct,
__u32 chunkId);
-static int yaffs2_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 yaffs2_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
-{
- if (!dev->param.isYaffs2)
- return;
-
- if((bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
- (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
- n, bi->sequenceNumber));
-}
static void yaffs_VerifyBlock(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;
}
-/*
- * Oldest Dirty Sequence Number handling.
- */
-
-/* yaffs2_CalcOldestDirtySequence()
- * yaffs2_FindOldestDirtySequence()
- * Calculate the oldest dirty sequence number if we don't know it.
- */
-static void yaffs2_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 yaffs2_FindOldestDirtySequence(yaffs_Device *dev)
-{
- if(!dev->param.isYaffs2)
- return;
-
- if(!dev->oldestDirtySequence)
- yaffs2_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 yaffs2_ClearOldestDirtySequence(yaffs_Device *dev, yaffs_BlockInfo *bi)
-{
-
- if(!dev->param.isYaffs2)
- return;
-
- if(!bi || bi->sequenceNumber == dev->oldestDirtySequence){
- dev->oldestDirtySequence = 0;
- dev->oldestDirtyBlock = 0;
- }
-}
-
-/*
- * yaffs2_UpdateOldestDirtySequence()
- * Update the oldest dirty sequence number whenever we dirty a block.
- * Only do this if the oldestDirtySequence is actually being tracked.
- */
-static void yaffs2_UpdateOldestDirtySequence(yaffs_Device *dev, unsigned blockNo, yaffs_BlockInfo *bi)
-{
- if(!dev->param.isYaffs2)
- return;
-
- if(dev->oldestDirtySequence){
- if(dev->oldestDirtySequence > bi->sequenceNumber){
- dev->oldestDirtySequence = bi->sequenceNumber;
- dev->oldestDirtyBlock = blockNo;
- }
- }
-}
/*
* Block retiring for handling a broken block.
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));
*/
-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
+yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
{
yaffs_Tnode *tn = yaffs_AllocateRawTnode(dev);
if (tn){
* 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)
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;
dev->chunkBits = NULL;
}
-static int yaffs2_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 */
-
- yaffs2_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);
-}
-
-/*
- * yaffs2_FindRefreshBlock()
- * periodically finds the oldest full block by sequence number for refreshing.
- * Only for yaffs2.
- */
-static __u32 yaffs2_FindRefreshBlock(yaffs_Device *dev)
-{
- __u32 b ;
-
- __u32 oldest = 0;
- __u32 oldestSequence = 0;
-
- yaffs_BlockInfo *bi;
-
- if(!dev->param.isYaffs2)
- return oldest;
-
- /*
- * If refresh period < 10 then refreshing is disabled.
- */
- if(dev->param.refreshPeriod < 10)
- 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);
}
-
-static int yaffs2_CheckpointRequired(yaffs_Device *dev)
-{
- int nblocks;
-
- if(!dev->param.isYaffs2)
- return 0;
-
- nblocks = dev->internalEndBlock - dev->internalStartBlock + 1 ;
-
- return !dev->param.skipCheckpointWrite &&
- (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS);
-}
-
-static int yaffs2_CalcCheckpointBlocksRequired(yaffs_Device *dev)
-{
- int retval;
-
- if(!dev->param.isYaffs2)
- return 0;
-
- if (!dev->nCheckpointBlocksRequired &&
- yaffs2_CheckpointRequired(dev)){
- /* Not a valid value so recalculate */
- int nBytes = 0;
- int nBlocks;
- int devBlocks = (dev->param.endBlock - dev->param.startBlock + 1);
-
- nBytes += sizeof(yaffs_CheckpointValidity);
- nBytes += sizeof(yaffs_CheckpointDevice);
- nBytes += devBlocks * sizeof(yaffs_BlockInfo);
- nBytes += devBlocks * dev->chunkBitmapStride;
- nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjects);
- nBytes += (dev->tnodeSize + sizeof(__u32)) * (dev->nTnodes);
- 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;
- }
-
- retval = dev->nCheckpointBlocksRequired - dev->blocksInCheckpoint;
- if(retval < 0)
- retval = 0;
- return retval;
-}
-
/*
* Check if there's space to allocate...
* Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
*/
-static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev, int nChunks)
+int yaffs_CheckSpaceForAllocation(yaffs_Device *dev, int nChunks)
{
int reservedChunks;
int reservedBlocks = dev->param.nReservedBlocks;
* 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);
#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;
}
}
-/*--------------------- Checkpointing --------------------*/
+/*--------------------- File read/write ------------------------
+ * Read and write have very similar structures.
+ * In general the read/write has three parts to it
+ * An incomplete chunk to start with (if the read/write is not chunk-aligned)
+ * Some complete chunks
+ * An incomplete chunk to end off with
+ *
+ * Curve-balls: the first chunk might also be the last chunk.
+ */
-static int yaffs2_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
+int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
+ int nBytes)
{
- yaffs_CheckpointValidity cp;
- memset(&cp, 0, sizeof(cp));
-
- cp.structType = sizeof(cp);
- cp.magic = YAFFS_MAGIC;
- cp.version = YAFFS_CHECKPOINT_VERSION;
- cp.head = (head) ? 1 : 0;
+ int chunk;
+ __u32 start;
+ int nToCopy;
+ int n = nBytes;
+ int nDone = 0;
+ yaffs_ChunkCache *cache;
- return (yaffs2_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
- 1 : 0;
-}
+ yaffs_Device *dev;
-static int yaffs2_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
-{
- yaffs_CheckpointValidity cp;
- int ok;
+ dev = in->myDev;
- ok = (yaffs2_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+ while (n > 0) {
+ /* chunk = offset / dev->nDataBytesPerChunk + 1; */
+ /* start = offset % dev->nDataBytesPerChunk; */
+ yaffs_AddrToChunk(dev, offset, &chunk, &start);
+ chunk++;
- if (ok)
- ok = (cp.structType == sizeof(cp)) &&
- (cp.magic == YAFFS_MAGIC) &&
- (cp.version == YAFFS_CHECKPOINT_VERSION) &&
- (cp.head == ((head) ? 1 : 0));
- return ok ? 1 : 0;
-}
+ /* OK now check for the curveball where the start and end are in
+ * the same chunk.
+ */
+ if ((start + n) < dev->nDataBytesPerChunk)
+ nToCopy = n;
+ else
+ nToCopy = dev->nDataBytesPerChunk - start;
-static void yaffs2_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
- yaffs_Device *dev)
-{
- cp->nErasedBlocks = dev->nErasedBlocks;
- cp->allocationBlock = dev->allocationBlock;
- cp->allocationPage = dev->allocationPage;
- cp->nFreeChunks = dev->nFreeChunks;
+ cache = yaffs_FindChunkCache(in, chunk);
- cp->nDeletedFiles = dev->nDeletedFiles;
- cp->nUnlinkedFiles = dev->nUnlinkedFiles;
- cp->nBackgroundDeletions = dev->nBackgroundDeletions;
- cp->sequenceNumber = dev->sequenceNumber;
+ /* 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. */
-static void yaffs2_CheckpointDeviceToDevice(yaffs_Device *dev,
- yaffs_CheckpointDevice *cp)
-{
- dev->nErasedBlocks = cp->nErasedBlocks;
- dev->allocationBlock = cp->allocationBlock;
- dev->allocationPage = cp->allocationPage;
- dev->nFreeChunks = cp->nFreeChunks;
+ 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;
+ }
- dev->nDeletedFiles = cp->nDeletedFiles;
- dev->nUnlinkedFiles = cp->nUnlinkedFiles;
- dev->nBackgroundDeletions = cp->nBackgroundDeletions;
- dev->sequenceNumber = cp->sequenceNumber;
-}
+ yaffs_UseChunkCache(dev, cache, 0);
+ cache->locked = 1;
-static int yaffs2_WriteCheckpointDevice(yaffs_Device *dev)
-{
- yaffs_CheckpointDevice cp;
- __u32 nBytes;
- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
- int ok;
+ memcpy(buffer, &cache->data[start], nToCopy);
- /* Write device runtime values*/
- yaffs2_DeviceToCheckpointDevice(&cp, dev);
- cp.structType = sizeof(cp);
+ cache->locked = 0;
+ } else {
+ /* Read into the local buffer then copy..*/
- ok = (yaffs2_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+ __u8 *localBuffer =
+ yaffs_GetTempBuffer(dev, __LINE__);
+ yaffs_ReadChunkDataFromObject(in, chunk,
+ localBuffer);
- /* Write block info */
- if (ok) {
- nBytes = nBlocks * sizeof(yaffs_BlockInfo);
- ok = (yaffs2_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
- }
+ memcpy(buffer, &localBuffer[start], nToCopy);
- /* Write chunk bits */
- if (ok) {
- nBytes = nBlocks * dev->chunkBitmapStride;
- ok = (yaffs2_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
- }
- return ok ? 1 : 0;
-}
+ yaffs_ReleaseTempBuffer(dev, localBuffer,
+ __LINE__);
+ }
-static int yaffs2_ReadCheckpointDevice(yaffs_Device *dev)
-{
- yaffs_CheckpointDevice cp;
- __u32 nBytes;
- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
+ } else {
- int ok;
+ /* A full chunk. Read directly into the supplied buffer. */
+ yaffs_ReadChunkDataFromObject(in, chunk, buffer);
- ok = (yaffs2_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
- if (!ok)
- return 0;
+ }
- if (cp.structType != sizeof(cp))
- return 0;
+ n -= nToCopy;
+ offset += nToCopy;
+ buffer += nToCopy;
+ nDone += nToCopy;
+ }
- yaffs2_CheckpointDeviceToDevice(dev, &cp);
+ return nDone;
+}
- nBytes = nBlocks * sizeof(yaffs_BlockInfo);
-
- ok = (yaffs2_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
-
- if (!ok)
- return 0;
- nBytes = nBlocks * dev->chunkBitmapStride;
-
- ok = (yaffs2_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
-
- return ok ? 1 : 0;
-}
-
-static void yaffs2_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
- yaffs_Object *obj)
-{
-
- 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 yaffs2_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
-{
-
- yaffs_Object *parent;
-
- 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;
- }
-
- obj->objectId = cp->objectId;
-
- if (cp->parentId)
- parent = yaffs_FindOrCreateObjectByNumber(
- obj->myDev,
- cp->parentId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
- else
- parent = NULL;
-
- if (parent) {
- if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
- TCONT(" chunk %d Parent type, %d, not directory")
- TENDSTR),
- cp->objectId, cp->parentId, cp->variantType,
- cp->hdrChunk, parent->variantType));
- return 0;
- }
- yaffs_AddObjectToDirectory(parent, obj);
- }
-
- obj->hdrChunk = cp->hdrChunk;
- obj->variantType = cp->variantType;
- obj->deleted = cp->deleted;
- obj->softDeleted = cp->softDeleted;
- obj->unlinked = cp->unlinked;
- obj->fake = cp->fake;
- obj->renameAllowed = cp->renameAllowed;
- obj->unlinkAllowed = cp->unlinkAllowed;
- obj->serial = cp->serial;
- obj->nDataChunks = cp->nDataChunks;
-
- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
- obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
- else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
- obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
-
- if (obj->hdrChunk > 0)
- obj->lazyLoaded = 1;
- return 1;
-}
-
-
-
-static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
- __u32 level, int chunkOffset)
-{
- int i;
- yaffs_Device *dev = in->myDev;
- int ok = 1;
-
- if (tn) {
- if (level > 0) {
-
- for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
- if (tn->internal[i]) {
- ok = yaffs_CheckpointTnodeWorker(in,
- tn->internal[i],
- level - 1,
- (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
- }
- }
- } else if (level == 0) {
- __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
- ok = (yaffs2_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
- if (ok)
- ok = (yaffs2_CheckpointWrite(dev, tn, dev->tnodeSize) == dev->tnodeSize);
- }
- }
-
- return ok;
-
-}
-
-static int yaffs2_WriteCheckpointTnodes(yaffs_Object *obj)
-{
- __u32 endMarker = ~0;
- int ok = 1;
-
- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
- ok = yaffs_CheckpointTnodeWorker(obj,
- obj->variant.fileVariant.top,
- obj->variant.fileVariant.topLevel,
- 0);
- if (ok)
- ok = (yaffs2_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
- sizeof(endMarker));
- }
-
- return ok ? 1 : 0;
-}
-
-static int yaffs2_ReadCheckpointTnodes(yaffs_Object *obj)
-{
- __u32 baseChunk;
- int ok = 1;
- yaffs_Device *dev = obj->myDev;
- yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
- yaffs_Tnode *tn;
- int nread = 0;
-
- ok = (yaffs2_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
-
- while (ok && (~baseChunk)) {
- nread++;
- /* Read level 0 tnode */
-
-
- tn = yaffs_GetTnode(dev);
- if (tn){
- ok = (yaffs2_CheckpointRead(dev, tn, dev->tnodeSize) == dev->tnodeSize);
- } else
- ok = 0;
-
- if (tn && ok)
- ok = yaffs_AddOrFindLevel0Tnode(dev,
- fileStructPtr,
- baseChunk,
- tn) ? 1 : 0;
-
- if (ok)
- ok = (yaffs2_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
-
- }
-
- T(YAFFS_TRACE_CHECKPOINT, (
- TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
- nread, baseChunk, ok));
-
- return ok ? 1 : 0;
-}
-
-
-static int yaffs2_WriteCheckpointObjects(yaffs_Device *dev)
-{
- yaffs_Object *obj;
- yaffs_CheckpointObject cp;
- int i;
- int ok = 1;
- struct ylist_head *lh;
-
-
- /* Iterate through the objects in each hash entry,
- * dumping them to the checkpointing stream.
- */
-
- for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
- ylist_for_each(lh, &dev->objectBucket[i].list) {
- if (lh) {
- obj = ylist_entry(lh, yaffs_Object, hashLink);
- if (!obj->deferedFree) {
- yaffs2_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));
-
- ok = (yaffs2_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
-
- if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
- ok = yaffs2_WriteCheckpointTnodes(obj);
- }
- }
- }
- }
-
- /* Dump end of list */
- memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
- cp.structType = sizeof(cp);
-
- if (ok)
- ok = (yaffs2_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
-
- return ok ? 1 : 0;
-}
-
-static int yaffs2_ReadCheckpointObjects(yaffs_Device *dev)
-{
- yaffs_Object *obj;
- yaffs_CheckpointObject cp;
- int ok = 1;
- int done = 0;
- yaffs_Object *hardList = NULL;
-
- while (ok && !done) {
- ok = (yaffs2_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
- if (cp.structType != sizeof(cp)) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
- cp.structType, (int)sizeof(cp), ok));
- ok = 0;
- }
-
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
- cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
-
- if (ok && cp.objectId == ~0)
- done = 1;
- else if (ok) {
- obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
- if (obj) {
- ok = yaffs2_CheckpointObjectToObject(obj, &cp);
- if (!ok)
- break;
- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
- ok = yaffs2_ReadCheckpointTnodes(obj);
- } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
- obj->hardLinks.next =
- (struct ylist_head *) hardList;
- hardList = obj;
- }
- } else
- ok = 0;
- }
- }
-
- if (ok)
- yaffs_HardlinkFixup(dev, hardList);
-
- return ok ? 1 : 0;
-}
-
-static int yaffs2_WriteCheckpointSum(yaffs_Device *dev)
-{
- __u32 checkpointSum;
- int ok;
-
- yaffs2_GetCheckpointSum(dev, &checkpointSum);
-
- ok = (yaffs2_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
-
- if (!ok)
- return 0;
-
- return 1;
-}
-
-static int yaffs2_ReadCheckpointSum(yaffs_Device *dev)
-{
- __u32 checkpointSum0;
- __u32 checkpointSum1;
- int ok;
-
- yaffs2_GetCheckpointSum(dev, &checkpointSum0);
-
- ok = (yaffs2_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
-
- if (!ok)
- return 0;
-
- if (checkpointSum0 != checkpointSum1)
- return 0;
-
- return 1;
-}
-
-
-static int yaffs2_WriteCheckpointData(yaffs_Device *dev)
-{
- int ok = 1;
-
- if (!yaffs2_CheckpointRequired(dev)) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
- ok = 0;
- }
-
- if (ok)
- ok = yaffs2_CheckpointOpen(dev, 1);
-
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
- ok = yaffs2_WriteCheckpointValidityMarker(dev, 1);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
- ok = yaffs2_WriteCheckpointDevice(dev);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
- ok = yaffs2_WriteCheckpointObjects(dev);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
- ok = yaffs2_WriteCheckpointValidityMarker(dev, 0);
- }
-
- if (ok)
- ok = yaffs2_WriteCheckpointSum(dev);
-
- if (!yaffs2_CheckpointClose(dev))
- ok = 0;
-
- if (ok)
- dev->isCheckpointed = 1;
- else
- dev->isCheckpointed = 0;
-
- return dev->isCheckpointed;
-}
-
-static int yaffs2_ReadCheckpointData(yaffs_Device *dev)
-{
- int ok = 1;
-
- if(!dev->param.isYaffs2)
- ok = 0;
-
- if (ok && dev->param.skipCheckpointRead) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
- ok = 0;
- }
-
- if (ok)
- ok = yaffs2_CheckpointOpen(dev, 0); /* open for read */
-
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
- ok = yaffs2_ReadCheckpointValidityMarker(dev, 1);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
- ok = yaffs2_ReadCheckpointDevice(dev);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
- ok = yaffs2_ReadCheckpointObjects(dev);
- }
- if (ok) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
- ok = yaffs2_ReadCheckpointValidityMarker(dev, 0);
- }
-
- if (ok) {
- ok = yaffs2_ReadCheckpointSum(dev);
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
- }
-
- if (!yaffs2_CheckpointClose(dev))
- ok = 0;
-
- if (ok)
- dev->isCheckpointed = 1;
- else
- dev->isCheckpointed = 0;
-
- return ok ? 1 : 0;
-
-}
-
-static void yaffs2_InvalidateCheckpoint(yaffs_Device *dev)
-{
- if (dev->isCheckpointed ||
- dev->blocksInCheckpoint > 0) {
- dev->isCheckpointed = 0;
- yaffs2_CheckpointInvalidateStream(dev);
- }
- if (dev->param.markSuperBlockDirty)
- dev->param.markSuperBlockDirty(dev);
-}
-
-
-int yaffs_CheckpointSave(yaffs_Device *dev)
-{
-
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
-
- yaffs_VerifyObjects(dev);
- yaffs_VerifyBlocks(dev);
- yaffs_VerifyFreeChunks(dev);
-
- if (!dev->isCheckpointed) {
- yaffs2_InvalidateCheckpoint(dev);
- yaffs2_WriteCheckpointData(dev);
- }
-
- T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
-
- return dev->isCheckpointed;
-}
-
-int yaffs2_CheckpointRestore(yaffs_Device *dev)
-{
- int retval;
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
-
- retval = yaffs2_ReadCheckpointData(dev);
-
- if (dev->isCheckpointed) {
- yaffs_VerifyObjects(dev);
- yaffs_VerifyBlocks(dev);
- yaffs_VerifyFreeChunks(dev);
- }
-
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
-
- return retval;
-}
-
-/*--------------------- File read/write ------------------------
- * Read and write have very similar structures.
- * In general the read/write has three parts to it
- * An incomplete chunk to start with (if the read/write is not chunk-aligned)
- * Some complete chunks
- * An incomplete chunk to end off with
- *
- * Curve-balls: the first chunk might also be the last chunk.
- */
-
-int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
- int nBytes)
-{
-
- int chunk;
- __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 yaffs_DoWriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
+ int nBytes, int writeThrough)
+{
int chunk;
__u32 start;
}
-static void yaffs_ResizeDown( yaffs_Object *obj, loff_t newSize)
+void yaffs_ResizeDown( yaffs_Object *obj, loff_t newSize)
{
int newFullChunks;
__u32 newSizeOfPartialChunk;
}
-static int yaffs2_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, NULL);
- }
-
- return result;
-
-}
-
int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
{
yaffs_Device *dev = in->myDev;
/*----------------------- Initialisation Scanning ---------------------- */
-static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
+void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
int backwardScanning)
{
yaffs_Object *obj;
}
-typedef struct {
- int seq;
- int block;
-} yaffs_BlockIndex;
-
-static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
+void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
{
yaffs_Object *hl;
yaffs_Object *in;
}
-
-
-
-static int yaffs2_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)
{
/*
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 yaffs1_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("yaffs1_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;
- }
-
+ 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);
}
}
}
-
- 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.
- */
+/*
+ * 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;
- yaffs_HardlinkFixup(dev, hardList);
+ 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);
- /* Fix up any shadowed objects */
- {
- struct yaffs_ShadowFixerStruct *fixer;
- yaffs_Object *obj;
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("Deleting lost_found object %d" TENDSTR),
+ obj->objectId));
- while (shadowFixerList) {
- fixer = shadowFixerList;
- shadowFixerList = fixer->next;
- /* Complete the rename transaction by deleting the shadowed object
- * then setting the object header to unshadowed.
+ /* Need to use UnlinkObject since Delete would not handle
+ * hardlinked objects correctly.
*/
- 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, NULL);
-
- YFREE(fixer);
+ yaffs_UnlinkObject(obj);
}
}
+
+}
- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
-
- if (alloc_failed)
- return YAFFS_FAIL;
-
- T(YAFFS_TRACE_SCAN, (TSTR("yaffs1_Scan ends" TENDSTR)));
-
-
- return YAFFS_OK;
+static void yaffs_EmptyLostAndFound(yaffs_Device *dev)
+{
+ yaffs_DeleteDirectoryContents(dev->lostNFoundDir);
}
static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
}
}
-static int yaffs2_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;
-
- T(YAFFS_TRACE_SCAN,
- (TSTR
- ("yaffs2_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("yaffs2_ScanBackwards() 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));
-
-
-
- YYIELD();
-
- /* Sort the blocks by sequence number*/
- yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), yaffs2_ybicmp);
-
- 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;
-
- foundChunksInBlock = 1;
-
-
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
-
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.
- objectId,
- YAFFS_OBJECT_TYPE_FILE);
- if (!in) {
- /* Out of memory */
- alloc_failed = 1;
- }
-
- if (in &&
- in->variantType == YAFFS_OBJECT_TYPE_FILE
- && chunkBase < in->variant.fileVariant.shrinkSize) {
- /* This has not been invalidated by a resize */
- if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, -1)) {
- alloc_failed = 1;
- }
-
- /* File size is calculated by looking at the data chunks if we have not
- * seen an object header yet. Stop this practice once we find an object header.
- */
- endpos = chunkBase + tags.byteCount;
-
- if (!in->valid && /* have not got an object header yet */
- in->variant.fileVariant.scannedFileSize < endpos) {
- in->variant.fileVariant.scannedFileSize = endpos;
- in->variant.fileVariant.fileSize = endpos;
- }
-
- } 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__);
-
- }
- } else {
- /* chunkId == 0, so it is an ObjectHeader.
- * Thus, we read in the object header and make the object
- */
- foundChunksInBlock = 1;
-
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
-
- oh = NULL;
- in = NULL;
-
- if (tags.extraHeaderInfoAvailable) {
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.objectId,
- tags.extraObjectType);
- if (!in)
- alloc_failed = 1;
- }
-
- if (!in ||
- (!in->valid && dev->param.disableLazyLoad) ||
- tags.extraShadows ||
- (!in->valid &&
- (tags.objectId == YAFFS_OBJECTID_ROOT ||
- tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
-
- /* If we don't have valid info then we need to read the chunk
- * TODO In future we can probably defer reading the chunk and
- * living with invalid data until needed.
- */
-
- result = yaffs_ReadChunkWithTagsFromNAND(dev,
- chunk,
- chunkData,
- NULL);
-
- oh = (yaffs_ObjectHeader *) chunkData;
-
- if (dev->param.inbandTags) {
- /* Fix up the header if they got corrupted by inband tags */
- oh->shadowsObject = oh->inbandShadowsObject;
- oh->isShrink = oh->inbandIsShrink;
- }
-
- if (!in) {
- in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
- if (!in)
- alloc_failed = 1;
- }
-
- }
-
- if (!in) {
- /* TODO Hoosterman we have a problem! */
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
- TENDSTR), tags.objectId, chunk));
- continue;
- }
-
- if (in->valid) {
- /* We have already filled this one.
- * We have a duplicate that will be discarded, but
- * we first have to suck out resize info if it is a file.
- */
-
- if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
- ((oh &&
- oh->type == YAFFS_OBJECT_TYPE_FILE) ||
- (tags.extraHeaderInfoAvailable &&
- tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
- __u32 thisSize =
- (oh) ? oh->fileSize : tags.
- extraFileLength;
- __u32 parentObjectId =
- (oh) ? oh->
- parentObjectId : tags.
- extraParentObjectId;
-
-
- isShrink =
- (oh) ? oh->isShrink : tags.
- extraIsShrinkHeader;
-
- /* If it is deleted (unlinked at start also means deleted)
- * we treat the file size as being zeroed at this point.
- */
- if (parentObjectId ==
- YAFFS_OBJECTID_DELETED
- || parentObjectId ==
- YAFFS_OBJECTID_UNLINKED) {
- thisSize = 0;
- isShrink = 1;
- }
-
- if (isShrink && in->variant.fileVariant.shrinkSize > thisSize)
- in->variant.fileVariant.shrinkSize = thisSize;
-
- if (isShrink)
- bi->hasShrinkHeader = 1;
-
- }
- /* Use existing - destroy this one. */
- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
-
- }
-
- if (!in->valid && 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;
-
-#endif
- } else {
- in->variantType = tags.extraObjectType;
- in->lazyLoaded = 1;
- }
-
- in->hdrChunk = chunk;
-
- } else if (!in->valid) {
- /* we need to load this info */
-
- in->valid = 1;
- in->hdrChunk = chunk;
-
- if (oh) {
- in->variantType = oh->type;
-
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
-#endif
-
- if (oh->shadowsObject > 0)
- yaffs_HandleShadowedObject(dev,
- oh->
- shadowsObject,
- 1);
-
-
-
- yaffs_SetObjectName(in, oh->name);
- parent =
- yaffs_FindOrCreateObjectByNumber
- (dev, oh->parentObjectId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
-
- fileSize = oh->fileSize;
- isShrink = oh->isShrink;
- equivalentObjectId = oh->equivalentObjectId;
-
- } else {
- in->variantType = tags.extraObjectType;
- parent =
- yaffs_FindOrCreateObjectByNumber
- (dev, tags.extraParentObjectId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
- fileSize = tags.extraFileLength;
- isShrink = tags.extraIsShrinkHeader;
- equivalentObjectId = tags.extraEquivalentObjectId;
- in->lazyLoaded = 1;
-
- }
- in->dirty = 0;
-
- if (!parent)
- alloc_failed = 1;
-
- /* directory stuff...
- * hook up to parent
- */
-
- if (parent && parent->variantType ==
- YAFFS_OBJECT_TYPE_UNKNOWN) {
- /* Set up as a directory */
- parent->variantType =
- YAFFS_OBJECT_TYPE_DIRECTORY;
- YINIT_LIST_HEAD(&parent->variant.
- directoryVariant.
- children);
- } else if (!parent || parent->variantType !=
- YAFFS_OBJECT_TYPE_DIRECTORY) {
- /* Hoosterman, another problem....
- * We're trying to use a non-directory as a directory
- */
-
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
- TENDSTR)));
- parent = dev->lostNFoundDir;
- }
-
- yaffs_AddObjectToDirectory(parent, in);
-
- itsUnlinked = (parent == dev->deletedDir) ||
- (parent == dev->unlinkedDir);
-
- if (isShrink) {
- /* Mark the block as having a shrinkHeader */
- bi->hasShrinkHeader = 1;
- }
-
- /* Note re hardlinks.
- * Since we might scan a hardlink before its equivalent object is scanned
- * we put them all in a list.
- * After scanning is complete, we should have all the objects, so we run
- * through this list and fix up all the chains.
- */
-
- switch (in->variantType) {
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* Todo got a problem */
- break;
- case YAFFS_OBJECT_TYPE_FILE:
-
- if (in->variant.fileVariant.
- scannedFileSize < fileSize) {
- /* This covers the case where the file size is greater
- * than where the data is
- * This will happen if the file is resized to be larger
- * than its current data extents.
- */
- in->variant.fileVariant.fileSize = fileSize;
- in->variant.fileVariant.scannedFileSize = fileSize;
- }
-
- if (in->variant.fileVariant.shrinkSize > fileSize)
- in->variant.fileVariant.shrinkSize = fileSize;
-
-
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- if (!itsUnlinked) {
- in->variant.hardLinkVariant.equivalentObjectId =
- equivalentObjectId;
- in->hardLinks.next =
- (struct ylist_head *) hardList;
- hardList = in;
- }
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- if (oh) {
- in->variant.symLinkVariant.alias =
- yaffs_CloneString(oh->alias);
- if (!in->variant.symLinkVariant.alias)
- alloc_failed = 1;
- }
- break;
- }
-
- }
-
- }
-
- } /* End of scanning for each chunk */
-
- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- /* If we got this far while scanning, then the block is fully allocated. */
- state = YAFFS_BLOCK_STATE_FULL;
- }
-
-
- 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);
- }
-
- }
-
- yaffs_SkipRestOfBlock(dev);
-
- if (altBlockIndex)
- YFREE_ALT(blockIndex);
- else
- YFREE(blockIndex);
-
- /* Ok, we've done all the scanning.
- * Fix up the hard link chains.
- * We should now have scanned all the objects, now it's time to add these
- * hardlinks.
- */
- yaffs_HardlinkFixup(dev, hardList);
-
-
- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
-
- if (alloc_failed)
- return YAFFS_FAIL;
-
- T(YAFFS_TRACE_SCAN, (TSTR("yaffs2_ScanBackwards ends" TENDSTR)));
-
- return YAFFS_OK;
-}
-
/*------------------------------ Directory Functions ----------------------------- */
static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
yaffs_VerifyDirectory(parent);
}
-static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
+void yaffs_AddObjectToDirectory(yaffs_Object *directory,
yaffs_Object *obj)
{
if (!directory) {
static int yaffs_freeVerificationFailures;
-static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
+void yaffs_VerifyFreeChunks(yaffs_Device *dev)
{
int counted;
int difference;