/*
- * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
*
* Copyright (C) 2002 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*/
const char *yaffs_guts_c_version =
- "$Id: yaffs_guts.c,v 1.18 2005-08-16 02:28:04 charles Exp $";
+ "$Id: yaffs_guts.c,v 1.45 2006-11-14 03:07:17 charles Exp $";
#include "yportenv.h"
#include "yaffs_tagsvalidity.h"
#include "yaffs_tagscompat.h"
+#ifndef CONFIG_YAFFS_OWN_SORT
+#include "yaffs_qsort.h"
+#endif
+#include "yaffs_nand.h"
+
+#include "yaffs_checkptrw.h"
+
+#include "yaffs_nand.h"
+#include "yaffs_packedtags2.h"
+
#ifdef CONFIG_YAFFS_WINCE
void yfsd_LockYAFFS(BOOL fsLockOnly);
#include "yaffs_ecc.h"
-/* NAND access */
-
-static Y_INLINE int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev,
- int chunkInNAND,
- __u8 * buffer,
- yaffs_ExtendedTags * tags);
-static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
- int chunkInNAND,
- const __u8 * data,
- yaffs_ExtendedTags * tags);
-static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo);
-static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device * dev,
- int blockNo,
- yaffs_BlockState * state,
- unsigned *sequenceNumber);
+
/* Robustification (if it ever comes about...) */
static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND);
-static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND);
+static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk);
static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND,
const __u8 * data,
const yaffs_ExtendedTags * tags);
const yaffs_ExtendedTags * tags);
/* Other local prototypes */
+static int yaffs_UnlinkObject( yaffs_Object *obj);
+static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
+
+static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
+
static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device * dev,
const __u8 * buffer,
yaffs_ExtendedTags * tags,
loff_t yaffs_GetFileSize(yaffs_Object * obj);
-static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve);
+static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr);
static void yaffs_VerifyFreeChunks(yaffs_Device * dev);
static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in);
static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId);
+static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
-/*
- * Start of real code.
- */
-/*
- * NAND access layer
- */
-
+/* Function to calculate chunk and offset */
-static int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
- __u8 * buffer,
- yaffs_ExtendedTags * tags)
+static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, __u32 *chunk, __u32 *offset)
{
- chunkInNAND -= dev->chunkOffset;
-
- if (dev->readChunkWithTagsFromNAND)
- return dev->readChunkWithTagsFromNAND(dev, chunkInNAND, buffer,
- tags);
+ if(dev->chunkShift){
+ /* Easy-peasy power of 2 case */
+ *chunk = (__u32)(addr >> dev->chunkShift);
+ *offset = (__u32)(addr & dev->chunkMask);
+ }
+ else if(dev->crumbsPerChunk)
+ {
+ /* Case where we're using "crumbs" */
+ *offset = (__u32)(addr & dev->crumbMask);
+ addr >>= dev->crumbShift;
+ *chunk = ((__u32)addr)/dev->crumbsPerChunk;
+ *offset += ((addr - (*chunk * dev->crumbsPerChunk)) << dev->crumbShift);
+ }
else
- return yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
- chunkInNAND,
- buffer,
- tags);
+ YBUG();
}
-static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
- int chunkInNAND,
- const __u8 * buffer,
- yaffs_ExtendedTags * tags)
+/* Function to return the number of shifts for a power of 2 greater than or equal
+ * to the given number
+ * Note we don't try to cater for all possible numbers and this does not have to
+ * be hellishly efficient.
+ */
+
+static __u32 ShiftsGE(__u32 x)
{
- chunkInNAND -= dev->chunkOffset;
-
- if (tags) {
- tags->sequenceNumber = dev->sequenceNumber;
- tags->chunkUsed = 1;
- if (!yaffs_ValidateTags(tags)) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("Writing uninitialised tags" TENDSTR)));
- YBUG();
- }
- T(YAFFS_TRACE_WRITE,
- (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
- tags->objectId, tags->chunkId));
- } else {
- T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
- YBUG();
+ int extraBits;
+ int nShifts;
+
+ nShifts = extraBits = 0;
+
+ while(x>1){
+ if(x & 1) extraBits++;
+ x>>=1;
+ nShifts++;
}
- if (dev->writeChunkWithTagsToNAND)
- return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
- tags);
- else
- return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
- chunkInNAND,
- buffer,
- tags);
+ if(extraBits)
+ nShifts++;
+
+ return nShifts;
}
-static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo)
-{
- blockNo -= dev->blockOffset;
-
- if (dev->markNANDBlockBad)
- return dev->markNANDBlockBad(dev, blockNo);
- else
- return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
-}
-static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device * dev,
- int blockNo,
- yaffs_BlockState * state,
- unsigned *sequenceNumber)
+/* Function to return the number of shifts to get a 1 in bit 0
+ */
+
+static __u32 ShiftDiv(__u32 x)
{
- blockNo -= dev->blockOffset;
-
- if (dev->queryNANDBlock)
- return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
- else
- return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
- state,
- sequenceNumber);
+ int nShifts;
+
+ nShifts = 0;
+
+ if(!x) return 0;
+
+ while( !(x&1)){
+ x>>=1;
+ nShifts++;
+ }
+
+ return nShifts;
}
-static int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
- int blockInNAND)
-{
- int result;
-
- blockInNAND -= dev->blockOffset;
-
- dev->nBlockErasures++;
- result = dev->eraseBlockInNAND(dev, blockInNAND);
-
- /* If at first we don't succeed, try again *once*.*/
- if (!result)
- result = dev->eraseBlockInNAND(dev, blockInNAND);
- return result;
-}
-static int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
-{
- return dev->initialiseNAND(dev);
-}
/*
* Temporary buffer manipulations.
*/
dev->unmanagedTempAllocations++;
- return YMALLOC(dev->nBytesPerChunk);
+ return YMALLOC(dev->nDataBytesPerChunk);
}
}
+/*
+ * Determine if we have a managed buffer.
+ */
+int yaffs_IsManagedTempBuffer(yaffs_Device * dev, const __u8 * buffer)
+{
+ int i;
+ for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
+ if (dev->tempBuffer[i].buffer == buffer)
+ return 1;
+
+ }
+
+ for (i = 0; i < dev->nShortOpCaches; i++) {
+ if( dev->srCache[i].data == buffer )
+ return 1;
+
+ }
+
+ if (buffer == dev->checkpointBuffer)
+ return 1;
+
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
+ return 0;
+}
+
/*
* Chunk bitmap manipulations
*/
static Y_INLINE int yaffs_HashFunction(int n)
{
+ n = abs(n);
return (n % YAFFS_NOBJECT_BUCKETS);
}
int retval = YAFFS_OK;
__u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
yaffs_ExtendedTags tags;
+ int result;
- yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
+
+ if(tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
+ retval = YAFFS_FAIL;
+
- if (!yaffs_CheckFF(data, dev->nBytesPerChunk) || tags.chunkUsed) {
+ if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
T(YAFFS_TRACE_NANDACCESS,
(TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
retval = YAFFS_FAIL;
{
int chunk;
- int writeOk = 1;
+ int writeOk = 0;
+ int erasedOk = 1;
int attempts = 0;
+ yaffs_BlockInfo *bi;
+
+ yaffs_InvalidateCheckpoint(dev);
do {
- chunk = yaffs_AllocateChunk(dev, useReserve);
+ chunk = yaffs_AllocateChunk(dev, useReserve,&bi);
if (chunk >= 0) {
+ /* First check this chunk is erased, if it needs checking.
+ * The checking policy (unless forced always on) is as follows:
+ * Check the first page we try to write in a block.
+ * - If the check passes then we don't need to check any more.
+ * - If the check fails, we check again...
+ * If the block has been erased, we don't need to check.
+ *
+ * However, if the block has been prioritised for gc, then
+ * we think there might be something odd about this block
+ * and stop using it.
+ *
+ * Rationale:
+ * We should only ever see chunks that have not been erased
+ * if there was a partially written chunk due to power loss
+ * This checking policy should catch that case with very
+ * few checks and thus save a lot of checks that are most likely not
+ * needed.
+ */
+
+ if(bi->gcPrioritise){
+ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+ } else {
+#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
+
+ bi->skipErasedCheck = 0;
- /* First check this chunk is erased... */
-#ifndef CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
- writeOk = yaffs_CheckChunkErased(dev, chunk);
#endif
- if (!writeOk) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("**>> yaffs chunk %d was not erased"
- TENDSTR), chunk));
- } else {
- writeOk =
- yaffs_WriteChunkWithTagsToNAND(dev, chunk,
- data, tags);
- }
- attempts++;
+ if(!bi->skipErasedCheck){
+ erasedOk = yaffs_CheckChunkErased(dev, chunk);
+ if(erasedOk && !bi->gcPrioritise)
+ bi->skipErasedCheck = 1;
+ }
- if (writeOk) {
- /*
- * Copy the data into the robustification buffer.
- * NB We do this at the end to prevent duplicates in the case of a write error.
- * Todo
- */
- yaffs_HandleWriteChunkOk(dev, chunk, data,
- tags);
- } else {
- yaffs_HandleWriteChunkError(dev, chunk);
+ if (!erasedOk) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("**>> yaffs chunk %d was not erased"
+ TENDSTR), chunk));
+ } else {
+ writeOk =
+ yaffs_WriteChunkWithTagsToNAND(dev, chunk,
+ data, tags);
+ }
+
+ attempts++;
+
+ if (writeOk) {
+ /*
+ * Copy the data into the robustification buffer.
+ * NB We do this at the end to prevent duplicates in the case of a write error.
+ * Todo
+ */
+ yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
+
+ } else {
+ /* The erased check or write failed */
+ yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
+ }
}
}
static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND)
{
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
+ yaffs_InvalidateCheckpoint(dev);
+
yaffs_MarkBlockBad(dev, blockInNAND);
- yaffs_GetBlockInfo(dev, blockInNAND)->blockState =
- YAFFS_BLOCK_STATE_DEAD;
+ bi->blockState = YAFFS_BLOCK_STATE_DEAD;
+ bi->gcPrioritise = 0;
+ bi->needsRetiring = 0;
dev->nRetiredBlocks++;
}
{
}
-static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND)
+void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
+{
+ if(!bi->gcPrioritise){
+ bi->gcPrioritise = 1;
+ dev->hasPendingPrioritisedGCs = 1;
+ bi->chunkErrorStrikes ++;
+
+ if(bi->chunkErrorStrikes > 3){
+ bi->needsRetiring = 1; /* Too many stikes, so retire this */
+ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
+
+ }
+
+ }
+}
+
+static void yaffs_ReportOddballBlocks(yaffs_Device *dev)
+{
+ int i;
+
+ for(i = dev->internalStartBlock; i <= dev->internalEndBlock && (yaffs_traceMask & YAFFS_TRACE_BAD_BLOCKS); i++){
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i);
+ if(bi->needsRetiring || bi->gcPrioritise)
+ T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("yaffs block %d%s%s" TENDSTR),
+ i,
+ bi->needsRetiring ? " needs retiring" : "",
+ bi->gcPrioritise ? " gc prioritised" : ""));
+
+ }
+}
+
+static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk)
{
+
int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
+
+ yaffs_HandleChunkError(dev,bi);
+
+
+ if(erasedOk ) {
+ /* Was an actual write failure, so mark the block for retirement */
+ bi->needsRetiring = 1;
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
- /* Mark the block for retirement */
- yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1;
+
+ }
+
/* Delete the chunk */
yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
}
static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes)
{
int i;
+ int tnodeSize;
yaffs_Tnode *newTnodes;
+ __u8 *mem;
+ yaffs_Tnode *curr;
+ yaffs_Tnode *next;
yaffs_TnodeList *tnl;
if (nTnodes < 1)
return YAFFS_OK;
+
+ /* Calculate the tnode size in bytes for variable width tnode support.
+ * Must be a multiple of 32-bits */
+ tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
/* make these things */
- newTnodes = YMALLOC(nTnodes * sizeof(yaffs_Tnode));
+ newTnodes = YMALLOC(nTnodes * tnodeSize);
+ mem = (__u8 *)newTnodes;
if (!newTnodes) {
T(YAFFS_TRACE_ERROR,
}
/* 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[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;
/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device * dev)
+static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device * dev)
{
yaffs_Tnode *tn = NULL;
#endif
dev->freeTnodes = dev->freeTnodes->internal[0];
dev->nFreeTnodes--;
- /* zero out */
- memset(tn, 0, sizeof(yaffs_Tnode));
}
return tn;
}
+static yaffs_Tnode *yaffs_GetTnode(yaffs_Device * dev)
+{
+ yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
+
+ if(tn)
+ memset(tn, 0, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
+
+ 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)
{
}
+
+void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos, unsigned val)
+{
+ __u32 *map = (__u32 *)tn;
+ __u32 bitInMap;
+ __u32 bitInWord;
+ __u32 wordInMap;
+ __u32 mask;
+
+ pos &= YAFFS_TNODES_LEVEL0_MASK;
+ val >>= dev->chunkGroupBits;
+
+ bitInMap = pos * dev->tnodeWidth;
+ wordInMap = bitInMap /32;
+ bitInWord = bitInMap & (32 -1);
+
+ mask = dev->tnodeMask << bitInWord;
+
+ map[wordInMap] &= ~mask;
+ map[wordInMap] |= (mask & (val << bitInWord));
+
+ if(dev->tnodeWidth > (32-bitInWord)) {
+ bitInWord = (32 - bitInWord);
+ wordInMap++;;
+ mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
+ map[wordInMap] &= ~mask;
+ map[wordInMap] |= (mask & (val >> bitInWord));
+ }
+}
+
+__u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos)
+{
+ __u32 *map = (__u32 *)tn;
+ __u32 bitInMap;
+ __u32 bitInWord;
+ __u32 wordInMap;
+ __u32 val;
+
+ pos &= YAFFS_TNODES_LEVEL0_MASK;
+
+ bitInMap = pos * dev->tnodeWidth;
+ wordInMap = bitInMap /32;
+ bitInWord = bitInMap & (32 -1);
+
+ val = map[wordInMap] >> bitInWord;
+
+ if(dev->tnodeWidth > (32-bitInWord)) {
+ bitInWord = (32 - bitInWord);
+ wordInMap++;;
+ val |= (map[wordInMap] << bitInWord);
+ }
+
+ val &= dev->tnodeMask;
+ val <<= dev->chunkGroupBits;
+
+ return val;
+}
+
/* ------------------- End of individual tnode manipulation -----------------*/
/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
* 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
*
* Used when modifying the tree.
+ *
+ * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
+ * be plugged into the ttree.
*/
static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev,
yaffs_FileStructure * fStruct,
- __u32 chunkId)
+ __u32 chunkId,
+ yaffs_Tnode *passedTn)
{
- yaffs_Tnode *tn;
-
int requiredTallness;
int i;
int l;
+ yaffs_Tnode *tn;
__u32 x;
l = fStruct->topLevel;
tn = fStruct->top;
- while (l > 0 && tn) {
- x = (chunkId >>
- ( YAFFS_TNODES_LEVEL0_BITS +
- (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
- YAFFS_TNODES_INTERNAL_MASK;
-
-
- if (!tn->internal[x])
- tn->internal[x] = yaffs_GetTnode(dev);
-
- tn = tn->internal[x];
- l--;
-
+
+ if(l > 0) {
+ while (l > 0 && tn) {
+ x = (chunkId >>
+ ( YAFFS_TNODES_LEVEL0_BITS +
+ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
+ YAFFS_TNODES_INTERNAL_MASK;
+
+
+ if((l>1) && !tn->internal[x]){
+ /* Add missing non-level-zero tnode */
+ tn->internal[x] = yaffs_GetTnode(dev);
+
+ } else if(l == 1) {
+ /* Looking from level 1 at level 0 */
+ if (passedTn) {
+ /* If we already have one, then release it.*/
+ if(tn->internal[x])
+ yaffs_FreeTnode(dev,tn->internal[x]);
+ tn->internal[x] = passedTn;
+
+ } else if(!tn->internal[x]) {
+ /* Don't have one, none passed in */
+ tn->internal[x] = yaffs_GetTnode(dev);
+ }
+ }
+
+ tn = tn->internal[x];
+ l--;
+ }
+ } else {
+ /* top is level 0 */
+ if(passedTn) {
+ memcpy(tn,passedTn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
+ yaffs_FreeTnode(dev,passedTn);
+ }
}
return tn;
for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
i--) {
- if (tn->level0[i]) {
+ theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
+ if (theChunk) {
chunkInInode =
(chunkOffset <<
YAFFS_TNODES_LEVEL0_BITS) + i;
- theChunk =
- tn->level0[i] << dev->
- chunkGroupBits;
-
foundChunk =
yaffs_FindChunkInGroup(dev,
theChunk,
}
- tn->level0[i] = 0;
+ yaffs_PutLevel0Tnode(dev,tn,i,0);
}
}
} else if (level == 0) {
for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
- if (tn->level0[i]) {
+ theChunk = yaffs_GetChunkGroupBase(dev,tn,i);
+ if (theChunk) {
/* Note this does not find the real chunk, only the chunk group.
* We make an assumption that a chunk group is not larger than
* a block.
*/
- theChunk =
- (tn->level0[i] << dev->
- chunkGroupBits);
-
yaffs_SoftDeleteChunk(dev, theChunk);
- tn->level0[i] = 0;
+ yaffs_PutLevel0Tnode(dev,tn,i,0);
}
}
return theObject;
}
+
static YCHAR *yaffs_CloneString(const YCHAR * str)
{
#endif
obj = yaffs_FindObjectByName(oldDir, oldName);
+ /* Check new name to long. */
+ if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK &&
+ yaffs_strlen(newName) > YAFFS_MAX_ALIAS_LENGTH)
+ /* ENAMETOOLONG */
+ return YAFFS_FAIL;
+ else if (obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK &&
+ yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
+ /* ENAMETOOLONG */
+ return YAFFS_FAIL;
if (obj && obj->renameAllowed) {
*/
yaffs_ChangeObjectName(obj, newDir, newName, force,
existingTarget->objectId);
- yaffs_Unlink(newDir, newName);
+ yaffs_UnlinkObject(existingTarget);
}
- return yaffs_ChangeObjectName(obj, newDir, newName, force, 0);
+ return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
}
return YAFFS_FAIL;
}
/*------------------------- Block Management and Page Allocation ----------------*/
-static int yaffs_InitialiseBlocks(yaffs_Device * dev, int nBlocks)
+static int yaffs_InitialiseBlocks(yaffs_Device * dev)
{
+ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
+
dev->allocationBlock = -1; /* force it to get a new one */
/* Todo we're assuming the malloc will pass. */
dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
+ if(!dev->blockInfo){
+ dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
+ dev->blockInfoAlt = 1;
+ }
+ else
+ dev->blockInfoAlt = 0;
/* Set up dynamic blockinfo stuff. */
- dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8;
+ dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
+ if(!dev->chunkBits){
+ dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
+ dev->chunkBitsAlt = 1;
+ }
+ else
+ dev->chunkBitsAlt = 0;
+
if (dev->blockInfo && dev->chunkBits) {
memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
static void yaffs_DeinitialiseBlocks(yaffs_Device * dev)
{
- YFREE(dev->blockInfo);
+ if(dev->blockInfoAlt)
+ YFREE_ALT(dev->blockInfo);
+ else
+ YFREE(dev->blockInfo);
+ dev->blockInfoAlt = 0;
+
dev->blockInfo = NULL;
- YFREE(dev->chunkBits);
+
+ if(dev->chunkBitsAlt)
+ YFREE_ALT(dev->chunkBits);
+ else
+ YFREE(dev->chunkBits);
+ dev->chunkBitsAlt = 0;
dev->chunkBits = NULL;
}
*/
return (bi->sequenceNumber <= dev->oldestDirtySequence);
- return 1;
-
}
/* FindDiretiestBlock is used to select the dirtiest block (or close enough)
int iterations;
int dirtiest = -1;
int pagesInUse;
+ int prioritised=0;
yaffs_BlockInfo *bi;
static int nonAggressiveSkip = 0;
+ int pendingPrioritisedExist = 0;
+
+ /* First let's see if we need to grab a prioritised block */
+ if(dev->hasPendingPrioritisedGCs){
+ for(i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++){
+
+ bi = yaffs_GetBlockInfo(dev, i);
+ if(bi->gcPrioritise) {
+ pendingPrioritisedExist = 1;
+ if(bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+ yaffs_BlockNotDisqualifiedFromGC(dev, bi)){
+ pagesInUse = (bi->pagesInUse - bi->softDeletions);
+ dirtiest = i;
+ prioritised = 1;
+ aggressive = 1; /* Fool the non-aggressive skip logiv below */
+ }
+ }
+ }
+
+ if(!pendingPrioritisedExist) /* None found, so we can clear this */
+ dev->hasPendingPrioritisedGCs = 0;
+ }
/* If we're doing aggressive GC then we are happy to take a less-dirty block, and
* search harder.
return -1;
}
- pagesInUse =
- (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
+ if(!prioritised)
+ pagesInUse =
+ (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
if (aggressive) {
iterations =
}
}
- for (i = 0; i <= iterations && pagesInUse > 0; i++) {
+ for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
b++;
if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
b = dev->internalStartBlock;
bi = yaffs_GetBlockInfo(dev, b);
+#if 0
+ if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) {
+ dirtiest = b;
+ pagesInUse = 0;
+ }
+ else
+#endif
+
if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
- (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
+ (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
+ yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
dirtiest = b;
pagesInUse = (bi->pagesInUse - bi->softDeletions);
}
if (dirtiest > 0) {
T(YAFFS_TRACE_GC,
- (TSTR("GC Selected block %d with %d free" TENDSTR), dirtiest,
- dev->nChunksPerBlock - pagesInUse));
+ (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
+ dev->nChunksPerBlock - pagesInUse,prioritised));
}
dev->oldestDirtySequence = 0;
/* If the block is still healthy erase it and mark as clean.
* If the block has had a data failure, then retire it.
*/
+
+ T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
+ (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
+ blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
+
bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
if (!bi->needsRetiring) {
+ yaffs_InvalidateCheckpoint(dev);
erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
if (!erasedOk) {
dev->nErasureFailures++;
bi->pagesInUse = 0;
bi->softDeletions = 0;
bi->hasShrinkHeader = 0;
+ bi->skipErasedCheck = 1; /* This is clean, so no need to check */
+ bi->gcPrioritise = 0;
yaffs_ClearChunkBits(dev, blockNo);
T(YAFFS_TRACE_ERASE,
}
-
+// Check if there's space to allocate...
+// Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
static int yaffs_CheckSpaceForAllocation(yaffs_Device * dev)
{
- int reservedChunks = (dev->nReservedBlocks * dev->nChunksPerBlock);
+ int reservedChunks;
+ int reservedBlocks = dev->nReservedBlocks;
+ int checkpointBlocks;
+
+ checkpointBlocks = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint;
+ if(checkpointBlocks < 0)
+ checkpointBlocks = 0;
+
+ reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
+
return (dev->nFreeChunks > reservedChunks);
}
-static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve)
+static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr)
{
int retVal;
yaffs_BlockInfo *bi;
dev->allocationBlock = -1;
}
+ if(blockUsedPtr)
+ *blockUsedPtr = bi;
+
return retVal;
}
int retVal = YAFFS_OK;
int cleanups = 0;
int i;
+ int isCheckpointBlock;
int chunksBefore = yaffs_GetErasedChunks(dev);
int chunksAfter;
yaffs_Object *object;
+ isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
+
bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
T(YAFFS_TRACE_TRACING,
dev->isDoingGC = 1;
- if (!yaffs_StillSomeChunkBits(dev, block)) {
+ if (isCheckpointBlock ||
+ !yaffs_StillSomeChunkBits(dev, block)) {
T(YAFFS_TRACE_TRACING,
(TSTR
("Collecting block %d that has no chunks in use" TENDSTR),
("yaffs: About to finally delete object %d"
TENDSTR), object->objectId));
yaffs_DoGenericObjectDeletion(object);
+ object->myDev->nDeletedFiles--;
}
}
int aggressive;
int gcOk = YAFFS_OK;
int maxTries = 0;
+
+ int checkpointBlockAdjust;
if (dev->isDoingGC) {
/* Bail out so we don't get recursive gc */
do {
maxTries++;
- if (dev->nErasedBlocks < dev->nReservedBlocks) {
+
+ checkpointBlockAdjust = (dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint);
+ if(checkpointBlockAdjust < 0)
+ checkpointBlockAdjust = 0;
+
+ if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust)) {
/* We need a block soon...*/
aggressive = 1;
} else {
tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
if (tn) {
- theChunk =
- tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] <<
- dev->chunkGroupBits;
+ theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
retVal =
yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
if (tn) {
- theChunk =
- tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] << dev->
- chunkGroupBits;
+ theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
retVal =
yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
/* Delete the entry in the filestructure (if found) */
if (retVal != -1) {
- tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = 0;
+ yaffs_PutLevel0Tnode(dev,tn,chunkInInode,0);
}
} else {
/*T(("No level 0 found for %d\n", chunkInInode)); */
objId = in->objectId;
fSize = in->variant.fileVariant.fileSize;
nChunks =
- (fSize + in->myDev->nBytesPerChunk - 1) / in->myDev->nBytesPerChunk;
+ (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
for (chunk = 1; chunk <= nChunks; chunk++) {
tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
if (tn) {
- theChunk =
- tn->level0[chunk & YAFFS_TNODES_LEVEL0_MASK] << in->
- myDev->chunkGroupBits;
+ theChunk = yaffs_GetChunkGroupBase(dev,tn,chunk);
if (yaffs_CheckChunkBits
(dev, theChunk / dev->nChunksPerBlock,
return YAFFS_OK;
}
- tn = yaffs_AddOrFindLevel0Tnode(dev, &in->variant.fileVariant,
- chunkInInode);
+ tn = yaffs_AddOrFindLevel0Tnode(dev,
+ &in->variant.fileVariant,
+ chunkInInode,
+ NULL);
if (!tn) {
return YAFFS_FAIL;
}
- existingChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK];
+ existingChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode);
if (inScan != 0) {
/* If we're scanning then we need to test for duplicates
in->nDataChunks++;
}
- tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] =
- (chunkInNAND >> dev->chunkGroupBits);
+ yaffs_PutLevel0Tnode(dev,tn,chunkInInode,chunkInNAND);
return YAFFS_OK;
}
if (chunkInNAND >= 0) {
return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
- buffer, NULL);
+ buffer,NULL);
} else {
T(YAFFS_TRACE_NANDACCESS,
(TSTR("Chunk %d not found zero instead" TENDSTR),
chunkInNAND));
/* get sane (zero) data if you read a hole */
- memset(buffer, 0, in->myDev->nBytesPerChunk);
+ memset(buffer, 0, in->myDev->nDataBytesPerChunk);
return 0;
}
if (markNAND &&
bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
-#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
-
- /* Read data before write, to ensure correct ecc
- * if we're using MTD verification under Linux
- */
- yaffs_ReadChunkFromNAND(dev, chunkId, NULL, &spare, 0);
-#endif
-
yaffs_InitialiseTags(&tags);
tags.chunkDeleted = 1;
int prevChunkId;
int retVal = 0;
+ int result = 0;
int newChunkId;
yaffs_ExtendedTags newTags;
prevChunkId = in->chunkId;
if (prevChunkId >= 0) {
- yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
buffer, NULL);
memcpy(oldName, oh->name, sizeof(oh->name));
}
- memset(buffer, 0xFF, dev->nBytesPerChunk);
+ memset(buffer, 0xFF, dev->nDataBytesPerChunk);
oh->type = in->variantType;
oh->yst_mode = in->yst_mode;
__LINE__);
}
- in->dirty = 0;
+ if(!yaffs_ObjectHasCachedWriteData(in))
+ in->dirty = 0;
/* If this was a shrink, then mark the block that the chunk lives on */
if (isShrink) {
* need a very intelligent search.
*/
+static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
+{
+ yaffs_Device *dev = obj->myDev;
+ int i;
+ yaffs_ChunkCache *cache;
+ int nCaches = obj->myDev->nShortOpCaches;
+
+ for(i = 0; i < nCaches; i++){
+ cache = &dev->srCache[i];
+ if (cache->object == obj &&
+ cache->dirty)
+ return 1;
+ }
+
+ return 0;
+}
+
+
static void yaffs_FlushFilesChunkCache(yaffs_Object * obj)
{
yaffs_Device *dev = obj->myDev;
}
+/*yaffs_FlushEntireDeviceCache(dev)
+ *
+ *
+ */
+
+void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
+{
+ yaffs_Object *obj;
+ int nCaches = dev->nShortOpCaches;
+ int i;
+
+ /* Find a dirty object in the cache and flush it...
+ * until there are no further dirty objects.
+ */
+ do {
+ obj = NULL;
+ for( i = 0; i < nCaches && !obj; i++) {
+ if (dev->srCache[i].object &&
+ dev->srCache[i].dirty)
+ obj = dev->srCache[i].object;
+
+ }
+ if(obj)
+ yaffs_FlushFilesChunkCache(obj);
+
+ } while(obj);
+
+}
+
+
/* Grab us a cache chunk for use.
* First look for an empty one.
* Then look for the least recently used non-dirty one.
}
}
-/*--------------------- 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.
- */
+/*--------------------- Checkpointing --------------------*/
-int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, __u32 offset,
- int nBytes)
+
+static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev,int head)
{
+ yaffs_CheckpointValidity 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;
+}
- int chunk;
- int start;
- int nToCopy;
- int n = nBytes;
- int nDone = 0;
- yaffs_ChunkCache *cache;
+static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
+{
+ 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;
+}
- yaffs_Device *dev;
+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;
+
+ cp->nDeletedFiles = dev->nDeletedFiles;
+ cp->nUnlinkedFiles = dev->nUnlinkedFiles;
+ cp->nBackgroundDeletions = dev->nBackgroundDeletions;
+ cp->sequenceNumber = dev->sequenceNumber;
+ cp->oldestDirtySequence = dev->oldestDirtySequence;
+
+}
- 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;
+
+ dev->nDeletedFiles = cp->nDeletedFiles;
+ dev->nUnlinkedFiles = cp->nUnlinkedFiles;
+ dev->nBackgroundDeletions = cp->nBackgroundDeletions;
+ dev->sequenceNumber = cp->sequenceNumber;
+ dev->oldestDirtySequence = cp->oldestDirtySequence;
+}
- while (n > 0) {
- chunk = offset / dev->nBytesPerChunk + 1; /* The first chunk is 1 */
- start = offset % dev->nBytesPerChunk;
- /* OK now check for the curveball where the start and end are in
- * the same chunk.
- */
- if ((start + n) < dev->nBytesPerChunk) {
- nToCopy = n;
- } else {
- nToCopy = dev->nBytesPerChunk - start;
- }
+static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
+{
+ yaffs_CheckpointDevice cp;
+ __u32 nBytes;
+ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
+
+ int ok;
+
+ /* Write device runtime values*/
+ yaffs_DeviceToCheckpointDevice(&cp,dev);
+ cp.structType = sizeof(cp);
+
+ ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp));
+
+ /* Write block info */
+ if(ok) {
+ nBytes = nBlocks * sizeof(yaffs_BlockInfo);
+ ok = (yaffs_CheckpointWrite(dev,dev->blockInfo,nBytes) == nBytes);
+ }
+
+ /* Write chunk bits */
+ if(ok) {
+ nBytes = nBlocks * dev->chunkBitmapStride;
+ ok = (yaffs_CheckpointWrite(dev,dev->chunkBits,nBytes) == nBytes);
+ }
+ return ok ? 1 : 0;
+
+}
+
+static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
+{
+ yaffs_CheckpointDevice cp;
+ __u32 nBytes;
+ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
+
+ int ok;
+
+ ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp));
+ if(!ok)
+ return 0;
+
+ if(cp.structType != sizeof(cp))
+ return 0;
+
+
+ yaffs_CheckpointDeviceToDevice(dev,&cp);
+
+ nBytes = nBlocks * sizeof(yaffs_BlockInfo);
+
+ ok = (yaffs_CheckpointRead(dev,dev->blockInfo,nBytes) == nBytes);
+
+ if(!ok)
+ return 0;
+ nBytes = nBlocks * dev->chunkBitmapStride;
+
+ ok = (yaffs_CheckpointRead(dev,dev->chunkBits,nBytes) == nBytes);
+
+ return ok ? 1 : 0;
+}
+
+static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
+ yaffs_Object *obj)
+{
+
+ cp->objectId = obj->objectId;
+ cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
+ cp->chunkId = obj->chunkId;
+ 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 void yaffs_CheckpointObjectToObject( yaffs_Object *obj,yaffs_CheckpointObject *cp)
+{
+
+ yaffs_Object *parent;
+
+ obj->objectId = cp->objectId;
+
+ if(cp->parentId)
+ parent = yaffs_FindOrCreateObjectByNumber(
+ obj->myDev,
+ cp->parentId,
+ YAFFS_OBJECT_TYPE_DIRECTORY);
+ else
+ parent = NULL;
+
+ if(parent)
+ yaffs_AddObjectToDirectory(parent, obj);
+
+ obj->chunkId = cp->chunkId;
+ 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->objectId >= YAFFS_NOBJECT_BUCKETS)
+ obj->lazyLoaded = 1;
+}
+
+
+
+static int yaffs_CheckpointTnodeWorker(yaffs_Object * in, yaffs_Tnode * tn,
+ __u32 level, int chunkOffset)
+{
+ int i;
+ yaffs_Device *dev = in->myDev;
+ int ok = 1;
+ int nTnodeBytes = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+
+ 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;
+ /* printf("write tnode at %d\n",baseOffset); */
+ ok = (yaffs_CheckpointWrite(dev,&baseOffset,sizeof(baseOffset)) == sizeof(baseOffset));
+ if(ok)
+ ok = (yaffs_CheckpointWrite(dev,tn,nTnodeBytes) == nTnodeBytes);
+ }
+ }
+
+ return ok;
+
+}
+
+static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
+{
+ __u32 endMarker = ~0;
+ int ok = 1;
+
+ if(obj->variantType == YAFFS_OBJECT_TYPE_FILE){
+ ok = yaffs_CheckpointTnodeWorker(obj,
+ obj->variant.fileVariant.top,
+ obj->variant.fileVariant.topLevel,
+ 0);
+ if(ok)
+ ok = (yaffs_CheckpointWrite(obj->myDev,&endMarker,sizeof(endMarker)) ==
+ sizeof(endMarker));
+ }
+
+ return ok ? 1 : 0;
+}
+
+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;
+
+ ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk));
+
+ while(ok && (~baseChunk)){
+ /* Read level 0 tnode */
+
+ /* printf("read tnode at %d\n",baseChunk); */
+ tn = yaffs_GetTnodeRaw(dev);
+ if(tn)
+ ok = (yaffs_CheckpointRead(dev,tn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8) ==
+ (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
+ else
+ ok = 0;
+
+ if(tn && ok){
+ ok = yaffs_AddOrFindLevel0Tnode(dev,
+ fileStructPtr,
+ baseChunk,
+ tn) ? 1 : 0;
+ }
+
+ if(ok)
+ ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk));
+
+ }
+
+ return ok ? 1 : 0;
+}
+
+
+static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
+{
+ yaffs_Object *obj;
+ yaffs_CheckpointObject cp;
+ int i;
+ int ok = 1;
+ struct list_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++){
+ list_for_each(lh, &dev->objectBucket[i].list) {
+ if (lh) {
+ obj = list_entry(lh, yaffs_Object, hashLink);
+ if (!obj->deferedFree) {
+ yaffs_ObjectToCheckpointObject(&cp,obj);
+ cp.structType = sizeof(cp);
+
+ T(YAFFS_TRACE_CHECKPOINT,(
+ TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
+ cp.objectId,cp.parentId,cp.variantType,cp.chunkId,(unsigned) obj));
+
+ ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp));
+
+ if(ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE){
+ ok = yaffs_WriteCheckpointTnodes(obj);
+ }
+ }
+ }
+ }
+ }
+
+ /* Dump end of list */
+ memset(&cp,0xFF,sizeof(yaffs_CheckpointObject));
+ cp.structType = sizeof(cp);
+
+ if(ok)
+ ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp));
+
+ return ok ? 1 : 0;
+}
+
+static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
+{
+ yaffs_Object *obj;
+ yaffs_CheckpointObject cp;
+ int ok = 1;
+ int done = 0;
+ yaffs_Object *hardList = NULL;
+
+ while(ok && !done) {
+ ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp));
+ if(cp.structType != sizeof(cp)) {
+ /* printf("structure parsing failed\n"); */
+ ok = 0;
+ }
+
+ if(ok && cp.objectId == ~0)
+ done = 1;
+ else if(ok){
+ obj = yaffs_FindOrCreateObjectByNumber(dev,cp.objectId, cp.variantType);
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("Checkpoint read object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
+ cp.objectId,cp.parentId,cp.variantType,cp.chunkId,(unsigned) obj));
+ if(obj) {
+ yaffs_CheckpointObjectToObject(obj,&cp);
+ if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
+ ok = yaffs_ReadCheckpointTnodes(obj);
+ } else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
+ obj->hardLinks.next =
+ (struct list_head *)
+ hardList;
+ hardList = obj;
+ }
+
+ }
+ }
+ }
+
+ if(ok)
+ yaffs_HardlinkFixup(dev,hardList);
+
+ return ok ? 1 : 0;
+}
+
+static int yaffs_WriteCheckpointData(yaffs_Device *dev)
+{
+
+ int ok;
+
+ ok = yaffs_CheckpointOpen(dev,1);
+
+ if(ok)
+ ok = yaffs_WriteCheckpointValidityMarker(dev,1);
+ if(ok)
+ ok = yaffs_WriteCheckpointDevice(dev);
+ if(ok)
+ ok = yaffs_WriteCheckpointObjects(dev);
+ if(ok)
+ ok = yaffs_WriteCheckpointValidityMarker(dev,0);
+
+ if(!yaffs_CheckpointClose(dev))
+ ok = 0;
+
+ if(ok)
+ dev->isCheckpointed = 1;
+ else
+ dev->isCheckpointed = 0;
+
+ return dev->isCheckpointed;
+}
+
+static int yaffs_ReadCheckpointData(yaffs_Device *dev)
+{
+ int ok;
+
+ ok = yaffs_CheckpointOpen(dev,0); /* open for read */
+
+ if(ok)
+ ok = yaffs_ReadCheckpointValidityMarker(dev,1);
+ if(ok)
+ ok = yaffs_ReadCheckpointDevice(dev);
+ if(ok)
+ ok = yaffs_ReadCheckpointObjects(dev);
+ if(ok)
+ ok = yaffs_ReadCheckpointValidityMarker(dev,0);
+
+
+
+ if(!yaffs_CheckpointClose(dev))
+ ok = 0;
+
+ if(ok)
+ dev->isCheckpointed = 1;
+ else
+ dev->isCheckpointed = 0;
+
+ return ok ? 1 : 0;
+
+}
+
+static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
+{
+ if(dev->isCheckpointed ||
+ dev->blocksInCheckpoint > 0){
+ dev->isCheckpointed = 0;
+ yaffs_CheckpointInvalidateStream(dev);
+ if(dev->superBlock && dev->markSuperBlockDirty)
+ dev->markSuperBlockDirty(dev->superBlock);
+ }
+}
+
+
+int yaffs_CheckpointSave(yaffs_Device *dev)
+{
+ yaffs_ReportOddballBlocks(dev);
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("save entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
+
+ if(!dev->isCheckpointed)
+ yaffs_WriteCheckpointData(dev);
+
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("save exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
+
+ return dev->isCheckpointed;
+}
+
+int yaffs_CheckpointRestore(yaffs_Device *dev)
+{
+ int retval;
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
+
+ retval = yaffs_ReadCheckpointData(dev);
+
+ T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed));
+
+ yaffs_ReportOddballBlocks(dev);
+
+ 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;
+ int 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);
* then use the cache (if there is caching)
* else bypass the cache.
*/
- if (cache || nToCopy != dev->nBytesPerChunk) {
+ if (cache || nToCopy != dev->nDataBytesPerChunk) {
if (dev->nShortOpCaches > 0) {
/* If we can't find the data in the cache, then load it up. */
#ifdef CONFIG_YAFFS_WINCE
yfsd_UnlockYAFFS(TRUE);
#endif
- memcpy(buffer, localBuffer, dev->nBytesPerChunk);
+ memcpy(buffer, localBuffer, dev->nDataBytesPerChunk);
#ifdef CONFIG_YAFFS_WINCE
yfsd_LockYAFFS(TRUE);
return nDone;
}
-int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, __u32 offset,
+int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset,
int nBytes, int writeThrough)
{
dev = in->myDev;
while (n > 0 && chunkWritten >= 0) {
- chunk = offset / dev->nBytesPerChunk + 1;
- start = offset % dev->nBytesPerChunk;
+ //chunk = offset / dev->nDataBytesPerChunk + 1;
+ //start = offset % dev->nDataBytesPerChunk;
+ yaffs_AddrToChunk(dev,offset,&chunk,&start);
+ chunk++;
/* OK now check for the curveball where the start and end are in
* the same chunk.
*/
- if ((start + n) < dev->nBytesPerChunk) {
+ if ((start + n) < dev->nDataBytesPerChunk) {
nToCopy = n;
/* Now folks, to calculate how many bytes to write back....
nBytesRead =
in->variant.fileVariant.fileSize -
- ((chunk - 1) * dev->nBytesPerChunk);
+ ((chunk - 1) * dev->nDataBytesPerChunk);
- if (nBytesRead > dev->nBytesPerChunk) {
- nBytesRead = dev->nBytesPerChunk;
+ if (nBytesRead > dev->nDataBytesPerChunk) {
+ nBytesRead = dev->nDataBytesPerChunk;
}
nToWriteBack =
(start + n)) ? nBytesRead : (start + n);
} else {
- nToCopy = dev->nBytesPerChunk - start;
- nToWriteBack = dev->nBytesPerChunk;
+ nToCopy = dev->nDataBytesPerChunk - start;
+ nToWriteBack = dev->nDataBytesPerChunk;
}
- if (nToCopy != dev->nBytesPerChunk) {
+ if (nToCopy != dev->nDataBytesPerChunk) {
/* An incomplete start or end chunk (or maybe both start and end chunk) */
if (dev->nShortOpCaches > 0) {
yaffs_ChunkCache *cache;
/* If we can't find the data in the cache, then load the cache */
cache = yaffs_FindChunkCache(in, chunk);
+
if (!cache
&& yaffs_CheckSpaceForAllocation(in->
myDev)) {
cache->
data);
}
+ else if(cache &&
+ !cache->dirty &&
+ !yaffs_CheckSpaceForAllocation(in->myDev)){
+ /* Drop the cache if it was a read cache item and
+ * no space check has been made for it.
+ */
+ cache = NULL;
+ }
if (cache) {
yaffs_UseChunkCache(dev, cache, 1);
#ifdef CONFIG_YAFFS_WINCE
yfsd_UnlockYAFFS(TRUE);
#endif
- memcpy(localBuffer, buffer, dev->nBytesPerChunk);
+ memcpy(localBuffer, buffer, dev->nDataBytesPerChunk);
#ifdef CONFIG_YAFFS_WINCE
yfsd_LockYAFFS(TRUE);
#endif
chunkWritten =
yaffs_WriteChunkDataToObject(in, chunk, localBuffer,
- dev->nBytesPerChunk,
+ dev->nDataBytesPerChunk,
0);
yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
#else
/* A full chunk. Write directly from the supplied buffer. */
chunkWritten =
yaffs_WriteChunkDataToObject(in, chunk, buffer,
- dev->nBytesPerChunk,
+ dev->nDataBytesPerChunk,
0);
#endif
/* Since we've overwritten the cached data, we better invalidate it. */
yaffs_Device *dev = in->myDev;
int oldFileSize = in->variant.fileVariant.fileSize;
- int lastDel = 1 + (oldFileSize - 1) / dev->nBytesPerChunk;
+ int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
- int startDel = 1 + (newSize + dev->nBytesPerChunk - 1) /
- dev->nBytesPerChunk;
+ int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
+ dev->nDataBytesPerChunk;
int i;
int chunkId;
}
-int yaffs_ResizeFile(yaffs_Object * in, int newSize)
+int yaffs_ResizeFile(yaffs_Object * in, loff_t newSize)
{
int oldFileSize = in->variant.fileVariant.fileSize;
- int sizeOfPartialChunk;
+ int newSizeOfPartialChunk;
+ int newFullChunks;
+
yaffs_Device *dev = in->myDev;
-
- sizeOfPartialChunk = newSize % dev->nBytesPerChunk;
+
+ yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
yaffs_FlushFilesChunkCache(in);
yaffs_InvalidateWholeChunkCache(in);
yaffs_PruneResizedChunks(in, newSize);
- if (sizeOfPartialChunk != 0) {
- int lastChunk = 1 + newSize / dev->nBytesPerChunk;
+ if (newSizeOfPartialChunk != 0) {
+ int lastChunk = 1 + newFullChunks;
+
__u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
/* Got to read and rewrite the last chunk with its new size and zero pad */
yaffs_ReadChunkDataFromObject(in, lastChunk,
localBuffer);
- memset(localBuffer + sizeOfPartialChunk, 0,
- dev->nBytesPerChunk - sizeOfPartialChunk);
+ memset(localBuffer + newSizeOfPartialChunk, 0,
+ dev->nDataBytesPerChunk - newSizeOfPartialChunk);
yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
- sizeOfPartialChunk, 1);
+ newSizeOfPartialChunk, 1);
yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
}
}
}
-int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name)
-{
- yaffs_Object *obj;
- obj = yaffs_FindObjectByName(dir, name);
+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 ---------------------- */
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;
+ list_add(&hl->hardLinks, &in->hardLinks);
+ } else {
+ /* Todo Need to report/handle this better.
+ * Got a problem... hardlink to a non-existant object
+ */
+ hl->variant.hardLinkVariant.equivalentObject = NULL;
+ INIT_LIST_HEAD(&hl->hardLinks);
+
+ }
+
+ }
+
+}
+
+
+
+
+
+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;
+
+}
+
static int yaffs_Scan(yaffs_Device * dev)
{
yaffs_ExtendedTags tags;
int startIterator;
int endIterator;
int nBlocksToScan = 0;
+ int result;
int chunk;
int c;
yaffs_BlockIndex *blockIndex = NULL;
+ if (dev->isYaffs2) {
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("yaffs_Scan is not for YAFFS2!" TENDSTR)));
+ return YAFFS_FAIL;
+ }
+
+ //TODO Throw all the yaffs2 stuuf out of yaffs_Scan since it is only for yaffs1 format.
+
T(YAFFS_TRACE_SCAN,
(TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
dev->internalStartBlock, dev->internalEndBlock));
/* Read the tags and decide what to do */
chunk = blk * dev->nChunksPerBlock + c;
- yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
&tags);
/* Let's have a good look at this chunk... */
yaffs_PutChunkIntoFile(in, tags.chunkId, chunk,
1);
endpos =
- (tags.chunkId - 1) * dev->nBytesPerChunk +
+ (tags.chunkId - 1) * dev->nDataBytesPerChunk +
tags.byteCount;
if (in->variantType == YAFFS_OBJECT_TYPE_FILE
&& in->variant.fileVariant.scannedFileSize <
yaffs_SetChunkBit(dev, blk, c);
bi->pagesInUse++;
- yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
chunkData,
NULL);
YFREE(blockIndex);
}
+
/* Ok, we've done all the scanning.
* Fix up the hard link chains.
* We should now have scanned all the objects, now it's time to add these
* hardlinks.
*/
- while (hardList) {
- hl = hardList;
- hardList = (yaffs_Object *) (hardList->hardLinks.next);
- in = yaffs_FindObjectByNumber(dev,
- hl->variant.hardLinkVariant.
- equivalentObjectId);
-
- if (in) {
- /* Add the hardlink pointers */
- hl->variant.hardLinkVariant.equivalentObject = in;
- list_add(&hl->hardLinks, &in->hardLinks);
- } else {
- /* Todo Need to report/handle this better.
- * Got a problem... hardlink to a non-existant object
- */
- hl->variant.hardLinkVariant.equivalentObject = NULL;
- INIT_LIST_HEAD(&hl->hardLinks);
-
- }
-
- }
+ yaffs_HardlinkFixup(dev,hardList);
/* Handle the unlinked files. Since they were left in an unlinked state we should
* just delete them.
return YAFFS_OK;
}
+static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
+{
+ __u8 *chunkData;
+ yaffs_ObjectHeader *oh;
+ yaffs_Device *dev = in->myDev;
+ yaffs_ExtendedTags tags;
+ int result;
+
+#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->lazyLoaded = 0;
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+
+ result = yaffs_ReadChunkWithTagsFromNAND(dev,in->chunkId,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);
+
+ yaffs_ReleaseTempBuffer(dev,chunkData, __LINE__);
+ }
+}
+
static int yaffs_ScanBackwards(yaffs_Device * dev)
{
yaffs_ExtendedTags tags;
int nBlocksToScan = 0;
int chunk;
+ int result;
int c;
int deleted;
yaffs_BlockState state;
yaffs_Object *hardList = NULL;
- yaffs_Object *hl;
yaffs_BlockInfo *bi;
int sequenceNumber;
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;
+
yaffs_BlockIndex *blockIndex = NULL;
+ int altBlockIndex = 0;
if (!dev->isYaffs2) {
T(YAFFS_TRACE_SCAN,
("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
+
+ if(!blockIndex) {
+ blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
+ altBlockIndex = 1;
+ }
+
+ if(!blockIndex) {
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
+ return YAFFS_FAIL;
+ }
+
+ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
/* Scan all the blocks to determine their state */
for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
bi->blockState = state;
bi->sequenceNumber = sequenceNumber;
+ if(bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
+ bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
+
T(YAFFS_TRACE_SCAN_DEBUG,
(TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
state, sequenceNumber));
- if (state == YAFFS_BLOCK_STATE_DEAD) {
+
+ if(state == YAFFS_BLOCK_STATE_CHECKPOINT){
+ /* todo .. fix free space ? */
+
+ } 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) {
}
}
- /*
- * Sort the blocks
- * Dungy old bubble sort for now...
- */
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
+
+
+
+ YYIELD();
+
+ /* Sort the blocks */
+#ifndef CONFIG_YAFFS_USE_OWN_SORT
+ {
+ /* Use qsort now. */
+ qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
+ }
+#else
{
+ /* Dungy old bubble sort... */
+
yaffs_BlockIndex temp;
int i;
int j;
blockIndex[i] = temp;
}
}
+#endif
+
+ YYIELD();
+
+ T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
/* Now scan the blocks looking at the data. */
startIterator = 0;
/* For each block.... backwards */
for (blockIterator = endIterator; 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;
deleted = 0;
/* For each chunk in each block that needs scanning.... */
+ foundChunksInBlock = 0;
for (c = dev->nChunksPerBlock - 1; c >= 0 &&
(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
*/
chunk = blk * dev->nChunksPerBlock + c;
- yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
+ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
&tags);
/* Let's have a good look at this chunk... */
if (!tags.chunkUsed) {
- // An unassigned chunk in the block
- // This means that either the block is empty or
- // this is the one being allocated from
+ /* An unassigned chunk in the block.
+ * If there are used chunks after this one, then
+ * it is a chunk that was skipped due to failing the erased
+ * check. Just skip it so that it can be deleted.
+ * But, more typically, We get here when this is an unallocated
+ * chunk and his means that either the block is empty or
+ * this is the one being allocated from
+ */
- if (c == 0) {
+ if(foundChunksInBlock)
+ {
+ /* This is a chunk that was skipped due to failing the erased check */
+
+ } else if (c == 0) {
/* We're looking at the first chunk in the block so the block is unused */
state = YAFFS_BLOCK_STATE_EMPTY;
dev->nErasedBlocks++;
} else {
- /* this is the block being allocated from */
- if (state ==
- YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- T(YAFFS_TRACE_SCAN,
- (TSTR
- (" Allocating from %d %d"
- TENDSTR), blk, c));
+ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+ state == YAFFS_BLOCK_STATE_ALLOCATING) {
+ if(dev->sequenceNumber == bi->sequenceNumber) {
+ /* this is the block being allocated from */
+
+ T(YAFFS_TRACE_SCAN,
+ (TSTR
+ (" Allocating from %d %d"
+ TENDSTR), blk, c));
+
+ state = YAFFS_BLOCK_STATE_ALLOCATING;
+ dev->allocationBlock = blk;
+ dev->allocationPage = c;
+ dev->allocationBlockFinder = blk;
+ }
+ else {
+ /* This is a partially written block that is not
+ * the current allocation block. This block must have
+ * had a write failure, so set up for retirement.
+ */
+
+ bi->needsRetiring = 1;
+ bi->gcPrioritise = 1;
+
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("Partially written block %d being set for retirement" TENDSTR),
+ blk));
+ }
+
}
- state = YAFFS_BLOCK_STATE_ALLOCATING;
- dev->allocationBlock = blk;
- dev->allocationPage = c;
- dev->allocationBlockFinder = blk;
- /* Set it to here to encourage the allocator to
- * go forth from here.
- */
- /* Yaffs2 sanity check:
- * This should be the one with the highest sequence number
- */
- if (dev->isYaffs2
- && (dev->sequenceNumber !=
- bi->sequenceNumber)) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("yaffs: Allocation block %d was not highest sequence "
- "id: block seq = %d, dev seq = %d"
- TENDSTR), blk,
- bi->sequenceNumber,
- dev->sequenceNumber));
- }
}
dev->nFreeChunks++;
+
} else if (tags.chunkId > 0) {
/* chunkId > 0 so it is a data chunk... */
unsigned int endpos;
-
__u32 chunkBase =
- (tags.chunkId - 1) * dev->nBytesPerChunk;
+ (tags.chunkId - 1) * dev->nDataBytesPerChunk;
+
+ foundChunksInBlock = 1;
+
yaffs_SetChunkBit(dev, blk, c);
bi->pagesInUse++;
*/
endpos =
(tags.chunkId -
- 1) * dev->nBytesPerChunk +
+ 1) * dev->nDataBytesPerChunk +
tags.byteCount;
if (!in->valid && /* have not got an object header yet */
/* 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++;
tags.extraObjectType);
}
- if (!in || !in->valid) {
+ if (!in ||
+#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
+ !in->valid ||
+#endif
+ tags.extraShadows ||
+ (!in->valid &&
+ (tags.objectId == YAFFS_OBJECTID_ROOT ||
+ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))
+ ) {
/* If we don't have valid info then we need to read the chunk
* TODO In future we can probably defer reading the chunk and
* living with invalid data until needed.
*/
- yaffs_ReadChunkWithTagsFromNAND(dev,
+ result = yaffs_ReadChunkWithTagsFromNAND(dev,
chunk,
chunkData,
NULL);
* we first have to suck out resize info if it is a file.
*/
- if ((in->variantType ==
- YAFFS_OBJECT_TYPE_FILE) && ((oh
- &&
- oh->
- type
- ==
- YAFFS_OBJECT_TYPE_FILE)
- ||
- (tags.
- extraHeaderInfoAvailable
- &&
- tags.
- extraObjectType
- ==
- YAFFS_OBJECT_TYPE_FILE))
+ if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
+ ((oh &&
+ oh-> type == YAFFS_OBJECT_TYPE_FILE)||
+ (tags.extraHeaderInfoAvailable &&
+ tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))
) {
__u32 thisSize =
(oh) ? oh->fileSize : tags.
YAFFS_OBJECTID_LOSTNFOUND)) {
/* We only load some info, don't fiddle with directory structure */
in->valid = 1;
- in->variantType = oh->type;
+
+ if(oh) {
+ in->variantType = oh->type;
- in->yst_mode = oh->yst_mode;
+ in->yst_mode = oh->yst_mode;
#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
+ in->win_atime[0] = oh->win_atime[0];
+ in->win_ctime[0] = oh->win_ctime[0];
+ in->win_mtime[0] = oh->win_mtime[0];
+ in->win_atime[1] = oh->win_atime[1];
+ in->win_ctime[1] = oh->win_ctime[1];
+ in->win_mtime[1] = oh->win_mtime[1];
#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
+ 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->chunkId = chunk;
} else if (!in->valid) {
/* we need to load this info */
in->valid = 1;
- in->variantType = oh->type;
+ in->chunkId = chunk;
+
+ if(oh) {
+ in->variantType = oh->type;
- in->yst_mode = oh->yst_mode;
+ in->yst_mode = oh->yst_mode;
#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
+ in->win_atime[0] = oh->win_atime[0];
+ in->win_ctime[0] = oh->win_ctime[0];
+ in->win_mtime[0] = oh->win_mtime[0];
+ in->win_atime[1] = oh->win_atime[1];
+ in->win_ctime[1] = oh->win_ctime[1];
+ in->win_mtime[1] = oh->win_mtime[1];
#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
+ in->yst_uid = oh->yst_uid;
+ in->yst_gid = oh->yst_gid;
+ in->yst_atime = oh->yst_atime;
+ in->yst_mtime = oh->yst_mtime;
+ in->yst_ctime = oh->yst_ctime;
+ in->yst_rdev = oh->yst_rdev;
#endif
- in->chunkId = chunk;
- if (oh->shadowsObject > 0) {
- yaffs_HandleShadowedObject(dev,
+ if (oh->shadowsObject > 0)
+ yaffs_HandleShadowedObject(dev,
oh->
shadowsObject,
1);
+
+
+ yaffs_SetObjectName(in, oh->name);
+ 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;
- yaffs_SetObjectName(in, oh->name);
+ }
in->dirty = 0;
/* directory stuff...
* hook up to parent
*/
- parent =
- yaffs_FindOrCreateObjectByNumber
- (dev, oh->parentObjectId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
if (parent->variantType ==
YAFFS_OBJECT_TYPE_UNKNOWN) {
/* Set up as a directory */
yaffs_AddObjectToDirectory(parent, in);
- if ((parent == dev->deletedDir ||
- parent == dev->unlinkedDir)) {
- /* If it is unlinked at start up then it wants deleting */
- in->deleted = 1;
- }
+ itsUnlinked = (parent == dev->deletedDir) ||
+ (parent == dev->unlinkedDir);
- if (oh->isShrink) {
+ if (isShrink) {
/* Mark the block as having a shrinkHeader */
bi->hasShrinkHeader = 1;
}
case YAFFS_OBJECT_TYPE_FILE:
if (in->variant.fileVariant.
- scannedFileSize <
- oh->fileSize) {
+ scannedFileSize < fileSize) {
/* This covers the case where the file size is greater
* than where the data is
* This will happen if the file is resized to be larger
* than its current data extents.
*/
- in->variant.fileVariant.fileSize =
- oh->fileSize;
+ in->variant.fileVariant.fileSize = fileSize;
in->variant.fileVariant.scannedFileSize =
in->variant.fileVariant.fileSize;
}
- if (oh->isShrink &&
- in->variant.fileVariant.shrinkSize >
- oh->fileSize) {
- in->variant.fileVariant.shrinkSize =
- oh->fileSize;
+ if (isShrink &&
+ in->variant.fileVariant.shrinkSize > fileSize) {
+ in->variant.fileVariant.shrinkSize = fileSize;
}
break;
case YAFFS_OBJECT_TYPE_HARDLINK:
- in->variant.hardLinkVariant.equivalentObjectId =
- oh->equivalentObjectId;
- in->hardLinks.next =
+ if(!itsUnlinked) {
+ in->variant.hardLinkVariant.equivalentObjectId =
+ equivalentObjectId;
+ in->hardLinks.next =
(struct list_head *) hardList;
- hardList = in;
+ hardList = in;
+ }
break;
case YAFFS_OBJECT_TYPE_DIRECTORY:
/* Do nothing */
/* Do nothing */
break;
case YAFFS_OBJECT_TYPE_SYMLINK:
- in->variant.symLinkVariant.
- alias =
+ if(oh)
+ in->variant.symLinkVariant.alias =
yaffs_CloneString(oh->
alias);
break;
}
- if (blockIndex) {
+ if (altBlockIndex)
+ YFREE_ALT(blockIndex);
+ else
YFREE(blockIndex);
- }
+
/* Ok, we've done all the scanning.
* Fix up the hard link chains.
* We should now have scanned all the objects, now it's time to add these
* hardlinks.
*/
- while (hardList) {
- hl = hardList;
- hardList = (yaffs_Object *) (hardList->hardLinks.next);
-
- in = yaffs_FindObjectByNumber(dev,
- hl->variant.hardLinkVariant.
- equivalentObjectId);
-
- if (in) {
- /* Add the hardlink pointers */
- hl->variant.hardLinkVariant.equivalentObject = in;
- list_add(&hl->hardLinks, &in->hardLinks);
- } else {
- /* Todo Need to report/handle this better.
- * Got a problem... hardlink to a non-existant object
- */
- hl->variant.hardLinkVariant.equivalentObject = NULL;
- INIT_LIST_HEAD(&hl->hardLinks);
-
- }
-
- }
-
+ yaffs_HardlinkFixup(dev,hardList);
+
+
+ /*
+ * Sort out state of unlinked and deleted objects.
+ */
{
struct list_head *i;
struct list_head *n;
/*------------------------------ Directory Functions ----------------------------- */
+static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj)
+{
+ yaffs_Device *dev = obj->myDev;
+
+ if(dev && dev->removeObjectCallback)
+ dev->removeObjectCallback(obj);
+
+ list_del_init(&obj->siblings);
+ obj->parent = NULL;
+}
+
+
static void yaffs_AddObjectToDirectory(yaffs_Object * directory,
yaffs_Object * obj)
{
} else if (!list_empty(&obj->siblings)) {
/* If it is holed up somewhere else, un hook it */
- list_del_init(&obj->siblings);
+ yaffs_RemoveObjectFromDirectory(obj);
}
/* Now add it */
list_add(&obj->siblings, &directory->variant.directoryVariant.children);
}
}
-static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj)
-{
- list_del_init(&obj->siblings);
- obj->parent = NULL;
-}
-
yaffs_Object *yaffs_FindObjectByName(yaffs_Object * directory,
const YCHAR * name)
{
list_for_each(i, &directory->variant.directoryVariant.children) {
if (i) {
l = list_entry(i, yaffs_Object, siblings);
+
+ yaffs_CheckObjectDetailsLoaded(l);
/* Special case for lost-n-found */
if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize)
{
memset(name, 0, buffSize * sizeof(YCHAR));
+
+ yaffs_CheckObjectDetailsLoaded(obj);
if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
}
#endif
else {
+ int result;
__u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer;
- memset(buffer, 0, obj->myDev->nBytesPerChunk);
+ memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
if (obj->chunkId >= 0) {
- yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
+ result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
obj->chunkId, buffer,
NULL);
}
return yaffs_strlen(obj->variant.symLinkVariant.alias);
} else {
/* Only a directory should drop through to here */
- return obj->myDev->nBytesPerChunk;
+ return obj->myDev->nDataBytesPerChunk;
}
}
return 0; /* bad */
}
+
+static void yaffs_CreateInitialDirectories(yaffs_Device *dev)
+{
+ /* Initialise the unlinked, deleted, root and lost and found directories */
+
+ dev->lostNFoundDir = dev->rootDir = NULL;
+ dev->unlinkedDir = dev->deletedDir = NULL;
+
+ dev->unlinkedDir =
+ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
+ dev->deletedDir =
+ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
+
+ dev->rootDir =
+ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT,
+ YAFFS_ROOT_MODE | S_IFDIR);
+ dev->lostNFoundDir =
+ yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
+ YAFFS_LOSTNFOUND_MODE | S_IFDIR);
+ yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
+}
+
int yaffs_GutsInitialise(yaffs_Device * dev)
{
unsigned x;
int bits;
- int extraBits;
- int nBlocks;
- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
+ T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
/* Check stuff that must be set */
/* Check geometry parameters. */
- if ((dev->isYaffs2 && dev->nBytesPerChunk < 1024) || (!dev->isYaffs2 && dev->nBytesPerChunk != 512) || dev->nChunksPerBlock < 2 || dev->nReservedBlocks < 2 || dev->internalStartBlock <= 0 || dev->internalEndBlock <= 0 || dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2) // otherwise it is too small
+ if ((dev->isYaffs2 && dev->nDataBytesPerChunk < 1024) ||
+ (!dev->isYaffs2 && dev->nDataBytesPerChunk != 512) ||
+ dev->nChunksPerBlock < 2 ||
+ dev->nReservedBlocks < 2 ||
+ dev->internalStartBlock <= 0 ||
+ dev->internalEndBlock <= 0 ||
+ dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2) // otherwise it is too small
) {
T(YAFFS_TRACE_ALWAYS,
(TSTR
("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s "
- TENDSTR), dev->nBytesPerChunk, dev->isYaffs2 ? "2" : ""));
+ TENDSTR), dev->nDataBytesPerChunk, dev->isYaffs2 ? "2" : ""));
return YAFFS_FAIL;
}
dev->isMounted = 1;
- nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
- /* OK now calculate a few things for the device
+
+ /* OK now calculate a few things for the device */
+
+ /*
+ * Calculate all the chunk size manipulation numbers:
+ */
+ /* Start off assuming it is a power of 2 */
+ dev->chunkShift = ShiftDiv(dev->nDataBytesPerChunk);
+ dev->chunkMask = (1<<dev->chunkShift) - 1;
+
+ if(dev->nDataBytesPerChunk == (dev->chunkMask + 1)){
+ /* Yes it is a power of 2, disable crumbs */
+ dev->crumbMask = 0;
+ dev->crumbShift = 0;
+ dev->crumbsPerChunk = 0;
+ } else {
+ /* Not a power of 2, use crumbs instead */
+ dev->crumbShift = ShiftDiv(sizeof(yaffs_PackedTags2TagsPart));
+ dev->crumbMask = (1<<dev->crumbShift)-1;
+ dev->crumbsPerChunk = dev->nDataBytesPerChunk/(1 << dev->crumbShift);
+ dev->chunkShift = 0;
+ dev->chunkMask = 0;
+ }
+
+
+ /*
* Calculate chunkGroupBits.
* We need to find the next power of 2 > than internalEndBlock
*/
x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
-
- for (bits = extraBits = 0; x > 1; bits++) {
- if (x & 1)
- extraBits++;
- x >>= 1;
+
+ bits = ShiftsGE(x);
+
+ /* Set up tnode width if wide tnodes are enabled. */
+ if(!dev->wideTnodesDisabled){
+ /* bits must be even so that we end up with 32-bit words */
+ if(bits & 1)
+ bits++;
+ if(bits < 16)
+ dev->tnodeWidth = 16;
+ else
+ dev->tnodeWidth = bits;
}
-
- if (extraBits > 0)
- bits++;
-
- /* Level0 Tnodes are 16 bits, so if the bitwidth of the
+ else
+ dev->tnodeWidth = 16;
+
+ dev->tnodeMask = (1<<dev->tnodeWidth)-1;
+
+ /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
+ * so if the bitwidth of the
* chunk range we're using is greater than 16 we need
* to figure out chunk shift and chunkGroupSize
*/
- if (bits <= 16) {
+
+ if (bits <= dev->tnodeWidth)
dev->chunkGroupBits = 0;
- } else {
- dev->chunkGroupBits = bits - 16;
- }
+ else
+ dev->chunkGroupBits = bits - dev->tnodeWidth;
+
dev->chunkGroupSize = 1 << dev->chunkGroupBits;
dev->nErasureFailures = 0;
dev->nErasedBlocks = 0;
dev->isDoingGC = 0;
+ dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
- /* Initialise temporary buffers */
+ /* Initialise temporary buffers and caches. */
{
int i;
for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
dev->tempBuffer[i].line = 0; /* not in use */
dev->tempBuffer[i].buffer =
- YMALLOC(dev->nBytesPerChunk);
+ YMALLOC_DMA(dev->nDataBytesPerChunk);
}
}
-
- yaffs_InitialiseBlocks(dev, nBlocks);
-
- yaffs_InitialiseTnodes(dev);
-
- yaffs_InitialiseObjects(dev);
-
- dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
-
+
if (dev->nShortOpCaches > 0) {
int i;
dev->srCache[i].object = NULL;
dev->srCache[i].lastUse = 0;
dev->srCache[i].dirty = 0;
- dev->srCache[i].data = YMALLOC(dev->nBytesPerChunk);
+ dev->srCache[i].data = YMALLOC_DMA(dev->nDataBytesPerChunk);
}
dev->srLastUse = 0;
}
dev->cacheHits = 0;
+
+ dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
- /* Initialise the unlinked, root and lost and found directories */
- dev->lostNFoundDir = dev->rootDir = NULL;
- dev->unlinkedDir = dev->deletedDir = NULL;
+ if (dev->isYaffs2) {
+ dev->useHeaderFileSize = 1;
+ }
- dev->unlinkedDir =
- yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
- dev->deletedDir =
- yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
+ yaffs_InitialiseBlocks(dev);
+ yaffs_InitialiseTnodes(dev);
+ yaffs_InitialiseObjects(dev);
+
+ yaffs_CreateInitialDirectories(dev);
- dev->rootDir =
- yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT,
- YAFFS_ROOT_MODE | S_IFDIR);
- dev->lostNFoundDir =
- yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
- YAFFS_LOSTNFOUND_MODE | S_IFDIR);
- yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
+ /* Now scan the flash. */
if (dev->isYaffs2) {
- dev->useHeaderFileSize = 1;
- }
+ if(yaffs_CheckpointRestore(dev)) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: restored from checkpoint" TENDSTR)));
+ } else {
- /* Now scan the flash. */
- if (dev->isYaffs2)
- yaffs_ScanBackwards(dev);
- else
+ /* Clean up the mess caused by an aborted checkpoint load
+ * and scan backwards.
+ */
+ yaffs_DeinitialiseBlocks(dev);
+ yaffs_DeinitialiseTnodes(dev);
+ yaffs_DeinitialiseObjects(dev);
+ yaffs_InitialiseBlocks(dev);
+ yaffs_InitialiseTnodes(dev);
+ yaffs_InitialiseObjects(dev);
+ yaffs_CreateInitialDirectories(dev);
+
+ yaffs_ScanBackwards(dev);
+ }
+ }else
yaffs_Scan(dev);
/* Zero out stats */
yaffs_VerifyFreeChunks(dev);
- T(YAFFS_TRACE_ALWAYS,
+ T(YAFFS_TRACE_TRACING,
(TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
return YAFFS_OK;
int nFree;
int nDirtyCacheChunks;
+ int blocksForCheckpoint;
#if 1
nFree = dev->nFreeChunks;
nFree = yaffs_CountFreeChunks(dev);
#endif
+ nFree += dev->nDeletedFiles;
+
/* Now count the number of dirty chunks in the cache and subtract those */
{
nFree -= nDirtyCacheChunks;
nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
+
+ /* Now we figure out how much to reserve for the checkpoint and report that... */
+ blocksForCheckpoint = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint;
+ if(blocksForCheckpoint < 0)
+ blocksForCheckpoint = 0;
+
+ nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
if (nFree < 0)
nFree = 0;
projects / yaffs2.git / blobdiff