*/
//yaffs_guts.c
+const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.14 2002-12-04 19:12:43 charles Exp $";
+
#include "yportenv.h"
#include "yaffsinterface.h"
#include "yaffs_guts.h"
-#if 0
-#define T(x) printf x
-#else
-#define T(x)
-#endif
+#define YAFFS_GARBAGE_COLLECT_LOW_WATER 2
+
+
// External functions for ECC on data
void nand_calculate_ecc (const u_char *dat, u_char *ecc_code);
// countBits is a quick way of counting the number of bits in a byte.
// ie. countBits[n] holds the number of 1 bits in a byte with the value n.
-static const char yaffs_countBits[256] =
+static const char yaffs_countBitsTable[256] =
{
0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,
1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8
};
-
-
-// Device info
-//static yaffs_Device *yaffs_device;
-//yaffs_Object *yaffs_rootDir;
-//yaffs_Object *yaffs_lostNFound;
+static int yaffs_CountBits(__u8 x)
+{
+ int retVal;
+ retVal = yaffs_countBitsTable[x];
+ return retVal;
+}
// Local prototypes
static int yaffs_CheckObjectHashSanity(yaffs_Device *dev);
static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr);
-static void yaffs_GetTagsFromSpare(yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr);
+static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr);
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 char *name);
+static int yaffs_UpdateObjectHeader(yaffs_Object *in,const char *name, int force);
static void yaffs_DeleteChunk(yaffs_Device *dev,int chunkId);
static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
static int yaffs_CheckStructures(void);
+static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, int chunkOffset,int *limit);
+static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
+
+static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev,int blockNo);
+
+// Robustification
+static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND);
+static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND);
+static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND);
+static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_Spare *spare);
+static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaffs_Spare *spare);
+
+static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND);
+
+static int yaffs_UnlinkWorker(yaffs_Object *obj);
+
+
+static int yaffs_VerifyCompare(const __u8 *d0, const __u8 * d1, const yaffs_Spare *s0, const yaffs_Spare *s1);
+
+
loff_t yaffs_GetFileSize(yaffs_Object *obj);
+static int yaffs_ReadChunkTagsFromNAND(yaffs_Device *dev,int chunkInNAND, yaffs_Tags *tags, int *chunkDeleted);
+static int yaffs_TagsMatch(const yaffs_Tags *tags, int objectId, int chunkInObject, int chunkDeleted);
+
static int yaffs_AllocateChunk(yaffs_Device *dev,int useReserve);
#define yaffs_CheckFileSanity(in)
#endif
-static int __inline__ yaffs_HashFunction(int n)
+static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
+static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
+
+
+static __inline__ yaffs_BlockInfo* yaffs_GetBlockInfo(yaffs_Device *dev, int blk)
+{
+ if(blk < dev->startBlock || blk > dev->endBlock)
+ {
+ T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs: block %d is not valid" TENDSTR),blk));
+ YBUG();
+ }
+ return &dev->blockInfo[blk - dev->startBlock];
+}
+
+
+static __inline__ int yaffs_HashFunction(int n)
{
return (n % YAFFS_NOBJECT_BUCKETS);
}
static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev,int chunkInNAND, const __u8 *data, yaffs_Spare *spare)
{
+ if(chunkInNAND < dev->startBlock * YAFFS_CHUNKS_PER_BLOCK)
+ {
+ T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs chunk %d is not valid" TENDSTR),chunkInNAND));
+ return YAFFS_FAIL;
+ }
+
+ dev->nPageWrites++;
return dev->writeChunkToNAND(dev,chunkInNAND,data,spare);
}
-int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare)
+struct nandspare {
+ yaffs_Spare spare;
+ int eccres1;
+ int eccres2;
+};
+
+int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
+ int chunkInNAND,
+ __u8 *data,
+ yaffs_Spare *spare,
+ int doErrorCorrection)
{
int retVal;
- __u8 calcEcc[3];
yaffs_Spare localSpare;
+
+#ifndef CONFIG_YAFFS_USE_NANDECC
+ __u8 calcEcc[3];
+ int eccResult1,eccResult2;
+#else
+ struct nandspare nspare;
+#endif
+
+ dev->nPageReads++;
+
+
+
if(!spare && data)
{
spare = &localSpare;
}
- retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,spare);
- if(data)
+
+#ifndef CONFIG_YAFFS_USE_NANDECC
+ retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,spare);
+ if(data && doErrorCorrection)
+ {
+ // Hoosterman, we had a data problem on this page
+ yaffs_HandleReadDataError(dev,chunkInNAND);
+ }
+#else
+ retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare*)&nspare);
+ memcpy (spare, &nspare, sizeof(yaffs_Spare));
+ if(data && doErrorCorrection)
{
- // Do ECC correction
- //Todo handle any errors
- nand_calculate_ecc(data,calcEcc);
- nand_correct_data (data,spare->ecc1, calcEcc);
- nand_calculate_ecc(&data[256],calcEcc);
- nand_correct_data (&data[256],spare->ecc2, calcEcc);
+ if(nspare.eccres1>0)
+ {
+ T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:0" TENDSTR),chunkInNAND));
+ }
+ else if(nspare.eccres1<0)
+ {
+ T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND));
+ }
+
+ if(nspare.eccres2>0)
+ {
+ T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND));
+ }
+ else if(nspare.eccres2<0)
+ {
+ T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND));
+ }
+
+ if(nspare.eccres2 || nspare.eccres2)
+ {
+ // Hoosterman, we had a data problem on this page
+ yaffs_HandleReadDataError(dev,chunkInNAND);
+ }
+
}
+#endif
return retVal;
}
-#ifdef YAFFS_PARANOID
static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND)
{
+
static int init = 0;
static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK];
static __u8 data[YAFFS_BYTES_PER_CHUNK];
static __u8 spare[16];
- int retVal;
-
- retVal = YAFFS_OK;
dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare *)spare);
init = 1;
}
- if(memcmp(cmpbuf,data,YAFFS_BYTES_PER_CHUNK)) retVal = YAFFS_FAIL;
- if(memcmp(cmpbuf,spare,16)) retVal = YAFFS_FAIL;
+ if(memcmp(cmpbuf,data,YAFFS_BYTES_PER_CHUNK)) return YAFFS_FAIL;
+ if(memcmp(cmpbuf,spare,16)) return YAFFS_FAIL;
+
- return retVal;
+ return YAFFS_OK;
}
-#endif
int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,int blockInNAND)
{
+ dev->nBlockErasures++;
return dev->eraseBlockInNAND(dev,blockInNAND);
}
{
int chunk;
- int writeOk = 0;
+ int writeOk = 1;
+ int attempts = 0;
unsigned char rbData[YAFFS_BYTES_PER_CHUNK];
yaffs_Spare rbSpare;
if(chunk >= 0)
{
- writeOk = yaffs_WriteChunkToNAND(dev,chunk,data,spare);
+
+ // 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_WriteChunkToNAND(dev,chunk,data,spare);
+ }
+ attempts++;
if(writeOk)
{
// Readback & verify
// If verify fails, then delete this chunk and try again
// To verify we compare everything except the block and
// page status bytes.
- yaffs_ReadChunkFromNAND(dev,chunk,rbData,&rbSpare);
+ // NB We check a raw read without ECC correction applied
+ yaffs_ReadChunkFromNAND(dev,chunk,rbData,&rbSpare,0);
- if(memcmp(data,rbData,YAFFS_BYTES_PER_CHUNK) != 0 ||
- spare->tagByte0 != rbSpare.tagByte0 ||
- spare->tagByte1 != rbSpare.tagByte1 ||
- spare->tagByte2 != rbSpare.tagByte2 ||
- spare->tagByte3 != rbSpare.tagByte3 ||
- spare->tagByte4 != rbSpare.tagByte4 ||
- spare->tagByte5 != rbSpare.tagByte5 ||
- spare->tagByte6 != rbSpare.tagByte6 ||
- spare->tagByte7 != rbSpare.tagByte7 ||
- spare->ecc1[0] != rbSpare.ecc1[0] ||
- spare->ecc1[1] != rbSpare.ecc1[1] ||
- spare->ecc1[2] != rbSpare.ecc1[2] ||
- spare->ecc2[0] != rbSpare.ecc2[0] ||
- spare->ecc2[1] != rbSpare.ecc2[1] ||
- spare->ecc2[2] != rbSpare.ecc2[2] )
+#ifndef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
+ if(!yaffs_VerifyCompare(data,rbData,spare,&rbSpare))
{
// Didn't verify
- yaffs_DeleteChunk(dev,chunk);
+ T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs write verify failed on chunk %d" TENDSTR), chunk));
+
writeOk = 0;
- }
+ }
+#endif
}
+ if(writeOk)
+ {
+ // Copy the data into the write buffer.
+ // NB We do this at the end to prevent duplicates in the case of a write error.
+ //Todo
+ yaffs_HandleWriteChunkOk(dev,chunk,data,spare);
+ }
+ else
+ {
+ yaffs_HandleWriteChunkError(dev,chunk);
+ }
}
+
} while(chunk >= 0 && ! writeOk);
+ if(attempts > 1)
+ {
+ T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs write required %d attempts" TENDSTR),attempts));
+ dev->nRetriedWrites+= (attempts - 1);
+ }
+
return chunk;
}
+///
+// Functions for robustisizing
+//
+//
+
+static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND)
+{
+ // Ding the blockStatus in the first two pages of the block.
+
+ yaffs_Spare spare;
+
+ memset(&spare, 0xff,sizeof(yaffs_Spare));
+
+ spare.blockStatus = 0;
+
+ yaffs_WriteChunkToNAND(dev, blockInNAND * YAFFS_CHUNKS_PER_BLOCK, NULL , &spare);
+ yaffs_WriteChunkToNAND(dev, blockInNAND * YAFFS_CHUNKS_PER_BLOCK + 1, NULL , &spare);
+
+ yaffs_GetBlockInfo(dev,blockInNAND)->blockState = YAFFS_BLOCK_STATE_DEAD;
+ dev->nRetiredBlocks++;
+}
+
+
+
+static int yaffs_RewriteBufferedBlock(yaffs_Device *dev)
+{
+ dev->doingBufferedBlockRewrite = 1;
+ //
+ // Remove erased chunks
+ // Rewrite existing chunks to a new block
+ // Set current write block to the new block
+
+ dev->doingBufferedBlockRewrite = 0;
+
+ return 1;
+}
+
+
+static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND)
+{
+ int blockInNAND = chunkInNAND/YAFFS_CHUNKS_PER_BLOCK;
+
+ // Mark the block for retirement
+ yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>>Block %d marked for retirement" TENDSTR),blockInNAND));
+
+
+ //TODO
+ // Just do a garbage collection on the affected block then retire the block
+ // NB recursion
+}
+
+
+static void yaffs_CheckWrittenBlock(yaffs_Device *dev,int chunkInNAND)
+{
+}
+
+static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_Spare *spare)
+{
+}
+
+static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaffs_Spare *spare)
+{
+}
+
+static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND)
+{
+ int blockInNAND = chunkInNAND/YAFFS_CHUNKS_PER_BLOCK;
+
+ // Mark the block for retirement
+ yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
+ // Delete the chunk
+ yaffs_DeleteChunk(dev,chunkInNAND);
+}
+
+
+
+static int yaffs_VerifyCompare(const __u8 *d0, const __u8 * d1, const yaffs_Spare *s0, const yaffs_Spare *s1)
+{
+
+
+ if( memcmp(d0,d1,YAFFS_BYTES_PER_CHUNK) != 0 ||
+ s0->tagByte0 != s1->tagByte0 ||
+ s0->tagByte1 != s1->tagByte1 ||
+ s0->tagByte2 != s1->tagByte2 ||
+ s0->tagByte3 != s1->tagByte3 ||
+ s0->tagByte4 != s1->tagByte4 ||
+ s0->tagByte5 != s1->tagByte5 ||
+ s0->tagByte6 != s1->tagByte6 ||
+ s0->tagByte7 != s1->tagByte7 ||
+ s0->ecc1[0] != s1->ecc1[0] ||
+ s0->ecc1[1] != s1->ecc1[1] ||
+ s0->ecc1[2] != s1->ecc1[2] ||
+ s0->ecc2[0] != s1->ecc2[0] ||
+ s0->ecc2[1] != s1->ecc2[1] ||
+ s0->ecc2[2] != s1->ecc2[2] )
+ {
+ return 0;
+ }
+
+ return 1;
+}
///////////////////////// Object management //////////////////
__u16 i = 1;
__u8 *bname = (__u8 *)name;
-
- while (*bname)
+ if(bname)
{
- sum += (*bname) * i;
- i++;
- bname++;
+ while ((*bname) && (i <=YAFFS_MAX_NAME_LENGTH))
+ {
+#ifdef CONFIG_YAFFS_WINCE
+ sum += toupper(*bname) * i;
+#else
+ sum += (*bname) * i;
+#endif
+ i++;
+ bname++;
+ }
}
return sum;
}
+void yaffs_SetObjectName(yaffs_Object *obj, const char *name)
+{
+#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+ if(name && strlen(name) <= YAFFS_SHORT_NAME_LENGTH)
+ {
+ strcpy(obj->shortName,name);
+ }
+ else
+ {
+ obj->shortName[0]='\0';
+ }
+#endif
+ obj->sum = yaffs_CalcNameSum(name);
+}
void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
{
void yaffs_CalcTagsECC(yaffs_Tags *tags)
{
- // Todo don't do anything yet. Need to calculate ecc
+ // Calculate an ecc
+
unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
unsigned i,j;
unsigned ecc = 0;
for(i = 0; i < 8; i++)
{
- for(j = 1; j &0x7f; j<<=1)
+ for(j = 1; j &0xff; j<<=1)
{
bit++;
if(b[i] & j)
}
-void yaffs_CheckECCOnTags(yaffs_Tags *tags)
+int yaffs_CheckECCOnTags(yaffs_Tags *tags)
{
unsigned ecc = tags->ecc;
ecc ^= tags->ecc;
- if(ecc)
+ if(ecc && ecc <= 64)
{
- // Needs fixing
+ // TODO: Handle the failure better. Retire?
unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
ecc--;
// Now recvalc the ecc
yaffs_CalcTagsECC(tags);
+
+ return 1; // recovered error
+ }
+ else if(ecc)
+ {
+ // Wierd ecc failure value
+ // TODO Need to do somethiong here
+ return -1; //unrecovered error
}
+
+ return 0;
}
if (!newTnodes)
{
- YALERT("Could not malloc tnodes");
+ T(YAFFS_TRACE_ERROR,(TSTR("yaffs: Could not allocate Tnodes"TENDSTR)));
return YAFFS_FAIL;
}
dev->nTnodesCreated += nTnodes;
// Now add this bunch of tnodes to a list for freeing up.
-
+ // NB If we can't add this to the management list it isn't fatal
+ // but it just means we can't free this bunch of tnodes later.
tnl = YMALLOC(sizeof(yaffs_TnodeList));
if(!tnl)
{
- YALERT("Could not add tnodes to management list");
+ T(YAFFS_TRACE_ERROR,(TSTR("yaffs: Could not add tnodes to management list" TENDSTR)));
+
}
else
{
}
- YINFO("Tnodes created");
+ T(YAFFS_TRACE_ALLOCATE,(TSTR("yaffs: Tnodes added" TENDSTR)));
return YAFFS_OK;
}
+#if 0
void yaffs_TnodeTest(yaffs_Device *dev)
{
}
}
+#endif
+
////////////////// END OF TNODE MANIPULATION ///////////////////////////
// Check sane level and chunk Id
if(level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
{
- char str[50];
- sprintf(str,"Bad level %d",level);
- YALERT(str);
+// char str[50];
+// sprintf(str,"Bad level %d",level);
+// YALERT(str);
return NULL;
}
+
if(chunkId > YAFFS_MAX_CHUNK_ID)
{
- char str[50];
- sprintf(str,"Bad chunkId %d",chunkId);
- YALERT(str);
+// char str[50];
+// sprintf(str,"Bad chunkId %d",chunkId);
+// YALERT(str);
return NULL;
}
// First check we're tall enough (ie enough topLevel)
- i = chunkId >> (dev->chunkGroupBits + YAFFS_TNODES_LEVEL0_BITS);
+ i = chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS);
requiredTallness = 0;
while(i)
{
// Traverse down to level 0
while (level > 0 && tn)
{
- tn = tn->internal[(chunkId >>(dev->chunkGroupBits + YAFFS_TNODES_LEVEL0_BITS + (level-1) * YAFFS_TNODES_INTERNAL_BITS)) &
+ tn = tn->internal[(chunkId >>(/* dev->chunkGroupBits + */ YAFFS_TNODES_LEVEL0_BITS + (level-1) * YAFFS_TNODES_INTERNAL_BITS)) &
YAFFS_TNODES_INTERNAL_MASK];
level--;
yaffs_Tnode *tn;
int requiredTallness;
+ int i;
+ int l;
- __u32 i;
- __u32 l;
-
+ __u32 x;
+
- T(("AddOrFind topLevel=%d, chunk=%d",fStruct->topLevel,chunkId));
+ //T((TSTR("AddOrFind topLevel=%d, chunk=%d"),fStruct->topLevel,chunkId));
// Check sane level and page Id
if(fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
{
- char str[50];
- sprintf(str,"Bad level %d",fStruct->topLevel);
- YALERT(str);
+// char str[50];
+// sprintf(str,"Bad level %d",fStruct->topLevel);
+// YALERT(str);
return NULL;
}
if(chunkId > YAFFS_MAX_CHUNK_ID)
{
- char str[50];
- sprintf(str,"Bad chunkId %d",chunkId);
- YALERT(str);
+// char str[50];
+// sprintf(str,"Bad chunkId %d",chunkId);
+// YALERT(str);
return NULL;
}
// First check we're tall enough (ie enough topLevel)
- i = chunkId >> (dev->chunkGroupBits + YAFFS_TNODES_LEVEL0_BITS);
+ x = chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS);
requiredTallness = 0;
- while(i)
+ while(x)
{
- i >>= YAFFS_TNODES_INTERNAL_BITS;
+ x >>= YAFFS_TNODES_INTERNAL_BITS;
requiredTallness++;
}
- T((" required=%d",requiredTallness));
+ //T((TSTR(" required=%d"),requiredTallness));
if(requiredTallness > fStruct->topLevel)
// Not tall enough,gotta make the tree taller
for(i = fStruct->topLevel; i < requiredTallness; i++)
{
- T((" add new top"));
+ //T((TSTR(" add new top")));
tn = yaffs_GetTnode(dev);
}
else
{
- YALERT("No more tnodes");
+ T(YAFFS_TRACE_ERROR,(TSTR("yaffs: no more tnodes" TENDSTR)));
}
}
tn = fStruct->top;
while (l > 0 && tn)
{
- i = (chunkId >> (dev->chunkGroupBits +YAFFS_TNODES_LEVEL0_BITS + (l-1) * YAFFS_TNODES_INTERNAL_BITS)) &
+ x = (chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS + (l-1) * YAFFS_TNODES_INTERNAL_BITS)) &
YAFFS_TNODES_INTERNAL_MASK;
- T((" [%d:%d]",l,i));
+ //T((TSTR(" [%d:%d]"),l,i));
- if(!tn->internal[i])
+ if(!tn->internal[x])
{
- T((" added"));
+ //T((TSTR(" added")));
- tn->internal[i] = yaffs_GetTnode(dev);
+ tn->internal[x] = yaffs_GetTnode(dev);
}
- tn = tn->internal[i];
+ tn = tn->internal[x];
l--;
}
- T(("\n"));
+ //TSTR(TENDSTR)));
return tn;
}
+// DeleteWorker scans backwards through the tnode tree and deletes all the
+// chunks and tnodes in the file
+// Returns 1 if the tree was deleted. Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
+
+static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, int chunkOffset,int *limit)
+{
+ int i;
+ int chunkInInode;
+ int theChunk;
+ yaffs_Tags tags;
+ int found;
+ int chunkDeleted;
+ int allDone = 1;
+
+
+ if(tn)
+ {
+ if(level > 0)
+ {
+
+ for(i = YAFFS_NTNODES_INTERNAL -1; allDone && i >= 0; i--)
+ {
+ if(tn->internal[i])
+ {
+ if(limit && (*limit) < 0)
+ {
+ allDone = 0;
+ }
+ else
+ {
+ allDone = yaffs_DeleteWorker(in,tn->internal[i],level - 1,
+ (chunkOffset << YAFFS_TNODES_INTERNAL_BITS ) + i ,limit);
+ }
+ if(allDone)
+ {
+ yaffs_FreeTnode(in->myDev,tn->internal[i]);
+ tn->internal[i] = NULL;
+ }
+ }
+
+ }
+ return (allDone) ? 1 : 0;
+ }
+ else if(level == 0)
+ {
+ for(i = YAFFS_NTNODES_LEVEL0 -1; i >= 0; i--) //NB Don't apply the limit here, always delete a whole level0
+ {
+ if(tn->level0[i])
+ {
+ int j;
+
+ chunkInInode = (chunkOffset << YAFFS_TNODES_LEVEL0_BITS ) + i;
+
+ theChunk = tn->level0[i] << in->myDev->chunkGroupBits;
+
+ // Now we need to search for it
+ for(j = 0,found = 0; theChunk && j < in->myDev->chunkGroupSize && !found; j++)
+ {
+ yaffs_ReadChunkTagsFromNAND(in->myDev,theChunk,&tags,&chunkDeleted);
+ if(yaffs_TagsMatch(&tags,in->objectId,chunkInInode,chunkDeleted))
+ {
+ // found it;
+ found = 1;
+
+ }
+ else
+ {
+ theChunk++;
+ }
+ }
+
+ if(found)
+ {
+ yaffs_DeleteChunk(in->myDev,theChunk);
+ in->nDataChunks--;
+ if(limit)
+ {
+ *limit = *limit-1;
+ }
+
+ }
+
+ tn->level0[i] = 0;
+ }
+
+ }
+ return 1;
+
+
+ }
+
+ }
+
+ return 1;
+
+}
+
+
+
// Pruning removes any part of the file structure tree that is beyond the
-// bounds of the file.
+// bounds of the file (ie that does not point to chunks).
+//
// A file should only get pruned when its size is reduced.
//
// Before pruning, the chunks must be pulled from the tree and the
+
/////////////////////// End of File Structure functions. /////////////////
// yaffs_CreateFreeObjects creates a bunch more objects and
if (!newObjects)
{
- YALERT("Could not allocate more objects");
+ T(YAFFS_TRACE_ALLOCATE,(TSTR("yaffs: Could not allocate more objects" TENDSTR)));
return YAFFS_FAIL;
}
list = YMALLOC(sizeof(yaffs_ObjectList));
if(!list)
{
- YALERT("Could not add Objects to management list");
+ T(YAFFS_TRACE_ALLOCATE,(TSTR("Could not add objects to management list" TENDSTR)));
}
else
{
}
- YINFO("Objects created");
-
return YAFFS_OK;
}
// Now sweeten it up...
memset(tn,0,sizeof(yaffs_Object));
+ tn->myDev = dev;
tn->chunkId = -1;
tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
INIT_LIST_HEAD(&(tn->hardLinks));
obj->fake = 1; // it is fake so it has no NAND presence...
obj->renameAllowed= 0; // ... and we're not allowed to rename it...
obj->unlinkAllowed= 0; // ... or unlink it
+ obj->deleted = 0;
+ obj->unlinked = 0;
obj->st_mode = mode;
obj->myDev = dev;
obj->chunkId = 0; // Not a valid chunk.
int found = 0;
struct list_head *i;
- int n = bucket;
+ __u32 n = (__u32)bucket;
//yaffs_CheckObjectHashSanity();
if(!list_empty(&in->hashLink))
{
- YINFO("!!!");
+ //YINFO("!!!");
}
-
+
list_add(&in->hashLink,&dev->objectBucket[bucket].list);
dev->objectBucket[bucket].count++;
}
-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev,int number)
+yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev,__u32 number)
{
int bucket = yaffs_HashFunction(number);
struct list_head *i;
list_for_each(i,&dev->objectBucket[bucket].list)
{
- // Lookm if it is in the list
+ // Look if it is in the list
in = list_entry(i, yaffs_Object,hashLink);
if(in->objectId == number)
{
theObject->renameAllowed = 1;
theObject->unlinkAllowed = 1;
theObject->objectId = number;
- theObject->myDev = dev;
yaffs_HashObject(theObject);
theObject->variantType = type;
- theObject->st_atime = theObject->st_mtime = theObject->st_ctime = CURRENT_TIME;
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_WinFileTimeNow(theObject->win_atime);
+ theObject->win_ctime[0] = theObject->win_mtime[0] = theObject->win_atime[0];
+ theObject->win_ctime[1] = theObject->win_mtime[1] = theObject->win_atime[1];
+#else
+ theObject->st_atime = theObject->st_mtime = theObject->st_ctime = CURRENT_TIME;
+#endif
switch(type)
{
case YAFFS_OBJECT_TYPE_FILE:
theObject->variant.fileVariant.fileSize = 0;
+ theObject->variant.fileVariant.scannedFileSize = 0;
theObject->variant.fileVariant.topLevel = 0;
theObject->variant.fileVariant.top = yaffs_GetTnode(dev);
break;
case YAFFS_OBJECT_TYPE_HARDLINK:
// No action required
break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ // No action required
+ break;
case YAFFS_OBJECT_TYPE_UNKNOWN:
// todo this should not happen
+ break;
}
}
{
yaffs_Object *theObject = NULL;
- if(number >= 0)
+ if(number > 0)
{
theObject = yaffs_FindObjectByNumber(dev,number);
}
// Mknod (create) a new object.
// equivalentObject only has meaning for a hard link;
// aliasString only has meaning for a sumlink.
+// rdev only has meaning for devices (a subset of special objects)
yaffs_Object *yaffs_MknodObject( yaffs_ObjectType type,
yaffs_Object *parent,
const char *name,
__u32 uid,
__u32 gid,
yaffs_Object *equivalentObject,
- const char *aliasString)
+ const char *aliasString,
+ __u32 rdev)
{
yaffs_Object *in;
in->variantType = type;
in->st_mode = mode;
+
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_WinFileTimeNow(in->win_atime);
+ in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
+ in->win_ctime[1] = in->win_mtime[1] = in->win_atime[0];
+
+#else
+ in->st_atime = in->st_mtime = in->st_ctime = CURRENT_TIME;
+ in->st_rdev = rdev;
in->st_uid = uid;
in->st_gid = gid;
- in->st_atime = in->st_mtime = in->st_ctime = CURRENT_TIME;
+#endif
+ in->nDataChunks = 0;
- in->sum = yaffs_CalcNameSum(name);
+ yaffs_SetObjectName(in,name);
in->dirty = 1;
yaffs_AddObjectToDirectory(parent,in);
break;
case YAFFS_OBJECT_TYPE_FILE: // do nothing
case YAFFS_OBJECT_TYPE_DIRECTORY: // do nothing
+ case YAFFS_OBJECT_TYPE_SPECIAL: // do nothing
case YAFFS_OBJECT_TYPE_UNKNOWN:
+ break;
}
- yaffs_UpdateObjectHeader(in,name);
+ if(yaffs_GetNumberOfFreeChunks(dev) <= 0 ||
+ yaffs_UpdateObjectHeader(in,name,0) < 0)
+ {
+ // Could not create the object header, fail the creation
+ yaffs_UnlinkWorker(in);
+ in = NULL;
+ }
}
yaffs_Object *yaffs_MknodFile(yaffs_Object *parent,const char *name, __u32 mode, __u32 uid, __u32 gid)
{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE,parent,name,mode,uid,gid,NULL,NULL);
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE,parent,name,mode,uid,gid,NULL,NULL,0);
}
yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent,const char *name, __u32 mode, __u32 uid, __u32 gid)
{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY,parent,name,mode,uid,gid,NULL,NULL);
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY,parent,name,mode,uid,gid,NULL,NULL,0);
+}
+
+yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent,const char *name, __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
+{
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY,parent,name,mode,uid,gid,NULL,NULL,rdev);
}
yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent,const char *name, __u32 mode, __u32 uid, __u32 gid,const char *alias)
{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK,parent,name,mode,uid,gid,NULL,alias);
+ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK,parent,name,mode,uid,gid,NULL,alias,0);
}
// NB yaffs_Link returns the object id of the equivalent object.
// Get the real object in case we were fed a hard link as an equivalent object
equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
- if(yaffs_MknodObject(YAFFS_OBJECT_TYPE_HARDLINK,parent,name,0,0,0,equivalentObject,NULL))
+ if(yaffs_MknodObject(YAFFS_OBJECT_TYPE_HARDLINK,parent,name,0,0,0,equivalentObject,NULL,0))
{
return equivalentObject;
}
}
-static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir, const char *newName)
+static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir, const char *newName,int force)
{
- //yaffs_Device *dev = obj->myDev;
+ int unlinkOp;
if(newDir == NULL)
{
newDir = obj->parent; // use the old directory
}
+
+ unlinkOp = (newDir == obj->myDev->unlinkedDir && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
- // Only proceed if the new name does not exist and
- // if we're putting it into a directory.
- if(!yaffs_FindObjectByName(newDir,newName) &&
- newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
+ // If the object is a file going into the unlinked directory, then it is OK to just stuff it in since
+ // duplicate names are allowed.
+ // Otherwise only proceed if the new name does not exist and if we're putting it into a directory.
+ if( (unlinkOp||
+ force ||
+ !yaffs_FindObjectByName(newDir,newName)) &&
+ newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
{
- obj->sum = yaffs_CalcNameSum(newName);
+ yaffs_SetObjectName(obj,newName);
obj->dirty = 1;
+
yaffs_AddObjectToDirectory(newDir,obj);
- if(yaffs_UpdateObjectHeader(obj,newName) >= 0)
+ if(unlinkOp) obj->unlinked = 1;
+
+
+ if(yaffs_UpdateObjectHeader(obj,newName,0) >= 0)
{
return YAFFS_OK;
}
return YAFFS_FAIL;
}
+
+
int yaffs_RenameObject(yaffs_Object *oldDir, const char *oldName, yaffs_Object *newDir, const char *newName)
{
yaffs_Object *obj;
+ int force = 0;
+
+#ifdef CONFIG_YAFFS_WINCE
+ // Special case for WinCE.
+ // While look-up is case insensitive, the name isn't.
+ // THerefore we might want to change x.txt to X.txt
+ if(oldDir == newDir && _stricmp(oldName,newName) == 0)
+ {
+ force = 1;
+ }
+#endif
obj = yaffs_FindObjectByName(oldDir,oldName);
if(obj && obj->renameAllowed)
{
- return yaffs_ChangeObjectName(obj,newDir,newName);
+ return yaffs_ChangeObjectName(obj,newDir,newName,force);
}
return YAFFS_FAIL;
}
if(countEm != dev->objectBucket[bucket].count)
{
- YALERT("Inode hash inconsistency");
+ T(YAFFS_TRACE_ERROR,(TSTR("Inode hash inconsistency" TENDSTR)));
ok = YAFFS_FAIL;
}
}
return ok;
}
+#if 0
void yaffs_ObjectTest(yaffs_Device *dev)
{
yaffs_Object *in[1000];
for(j = 0; j < 10; j++)
{
- T(("%d\n",j));
+ //T(("%d\n",j));
for(i = 0; i < 1000; i++)
{
{
if(yaffs_FindObjectByNumber(dev,inNo[i]) != in[i])
{
- T(("Differnce in look up test\n"));
+ //T(("Differnce in look up test\n"));
}
else
{
}
-
+#endif
/////////////////////////// Block Management and Page Allocation ///////////////////
-static void yaffs_InitialiseBlocks(yaffs_Device *dev)
+static int yaffs_InitialiseBlocks(yaffs_Device *dev,int nBlocks)
{
- dev->blockInfo = YMALLOC(dev->nBlocks * sizeof(yaffs_BlockInfo));
- memset(dev->blockInfo,0,dev->nBlocks * sizeof(yaffs_BlockInfo));
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)
+ {
+ memset(dev->blockInfo,0,nBlocks * sizeof(yaffs_BlockInfo));
+ return YAFFS_OK;
+ }
+ return YAFFS_FAIL;
+
}
static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
int i;
int dirtiest = -1;
int pagesInUse = 100; // silly big number
+ yaffs_BlockInfo *bi;
for(i = dev->startBlock; i <= dev->endBlock && pagesInUse > 2 ; i++)
{
b++;
- if (b > dev->endBlock)
+ if ( b < dev->startBlock || b > dev->endBlock)
{
b = dev->startBlock;
}
+
+ if(b < dev->startBlock || b > dev->endBlock)
+ {
+ T(YAFFS_TRACE_ERROR,(TSTR("**>> Block %d is not valid" TENDSTR),b));
+ YBUG();
+ }
+
+ bi = yaffs_GetBlockInfo(dev,b);
- if(dev->blockInfo[b].blockState == YAFFS_BLOCK_STATE_FULL &&
- (dev->blockInfo)[b].pagesInUse < pagesInUse)
+ if(bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+ bi->pagesInUse < pagesInUse)
{
dirtiest = b;
- pagesInUse = (dev->blockInfo)[b].pagesInUse;
+ pagesInUse = bi->pagesInUse;
}
}
}
-static int yaffs_FindBlockForAllocation(yaffs_Device *dev,int useReserve)
+static void yaffs_BlockBecameDirty(yaffs_Device *dev,int blockNo)
{
- int i;
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,blockNo);
- if(useReserve && dev->nErasedBlocks < 1)
- {
- // Hoosterman we've got a problem.
- // Can't get space to gc
- return -1;
+ int erasedOk = 0;
+
+ // If the block is still healthy erase it and mark as clean.
+ // If the block has had a data failure, then retire it.
+ bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
+
+ if(!bi->needsRetiring)
+ {
+ erasedOk = yaffs_EraseBlockInNAND(dev,blockNo);
+ if(!erasedOk)
+ {
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>> Erasure failed %d" TENDSTR),blockNo));
+ }
+ }
+
+ if( erasedOk )
+ {
+ bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
+ dev->nErasedBlocks++;
+ bi->pagesInUse = 0;
+ bi->pageBits = 0;
+
+ T(YAFFS_TRACE_ERASE,(TSTR("Erased block %d" TENDSTR),blockNo));
}
- else if(!useReserve && dev->nErasedBlocks <= YAFFS_RESERVED_BLOCKS)
+ else
{
- // We are not in GC, so we hold some in reserve so we can get
- // a gc done.
+ yaffs_RetireBlock(dev,blockNo);
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>> Block %d retired" TENDSTR),blockNo));
+ }
+}
+
+
+static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
+{
+ int i;
+ yaffs_BlockInfo *bi;
+
+ if(dev->nErasedBlocks < 1)
+ {
+ // Hoosterman we've got a problem.
+ // Can't get space to gc
+ T(YAFFS_TRACE_ERROR, (TSTR("yaffs tradgedy: no space during gc" TENDSTR)));
+
+ return -1;
}
// Find an empty block.
for(i = dev->startBlock; i <= dev->endBlock; i++)
{
-
- if(dev->blockInfo[i].blockState == YAFFS_BLOCK_STATE_EMPTY)
+ bi = yaffs_GetBlockInfo(dev,i);
+ if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
{
- dev->blockInfo[i].blockState = YAFFS_BLOCK_STATE_ALLOCATING;
- dev->nErasedBlocks--;
- if(dev->nErasedBlocks <= YAFFS_RESERVED_BLOCKS)
- {
- dev->garbageCollectionRequired = 1;
- }
-
+ bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
+ dev->nErasedBlocks--;
return i;
}
}
}
-static void yaffs_BlockBecameDirty(yaffs_Device *dev,int blockNo)
-{
- yaffs_BlockInfo *bi = &dev->blockInfo[blockNo];
-
- // Mark as dirty, erase it and mark as clean.
- bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
- yaffs_EraseBlockInNAND(dev,blockNo);
- bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
- dev->nErasedBlocks++;
- bi->pagesInUse = 0;
- bi->pageBits = 0;
-
- T(("Erased block %d\n",blockNo));
-}
-
static int yaffs_AllocateChunk(yaffs_Device *dev,int useReserve)
{
int retVal;
+ yaffs_BlockInfo *bi;
if(dev->allocationBlock < 0)
{
// Get next block to allocate off
- dev->allocationBlock = yaffs_FindBlockForAllocation(dev,useReserve);
+ dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
dev->allocationPage = 0;
}
+ if(!useReserve && dev->nErasedBlocks <= YAFFS_RESERVED_BLOCKS)
+ {
+ // Not enough space to allocate unless we're allowed to use the reserve.
+ return -1;
+ }
+
// Next page please....
if(dev->allocationBlock >= 0)
{
+ bi = yaffs_GetBlockInfo(dev,dev->allocationBlock);
+
retVal = (dev->allocationBlock * YAFFS_CHUNKS_PER_BLOCK) +
dev->allocationPage;
- dev->blockInfo[dev->allocationBlock].pagesInUse++;
- dev->blockInfo[dev->allocationBlock].pageBits |=
- (1 << (dev->allocationPage));
+ bi->pagesInUse++;
+ bi->pageBits |= (1 << (dev->allocationPage));
dev->allocationPage++;
// If the block is full set the state to full
if(dev->allocationPage >= YAFFS_CHUNKS_PER_BLOCK)
{
- dev->blockInfo[dev->allocationBlock].blockState = YAFFS_BLOCK_STATE_FULL;
+ bi->blockState = YAFFS_BLOCK_STATE_FULL;
dev->allocationBlock = -1;
}
-#ifdef YAFFS_PARANOID
- if(yaffs_CheckChunkErased(dev,retVal) == YAFFS_FAIL)
- {
- T(("..................Trying to allocate non-erased page %d\n",retVal));
- }
-#endif
+
return retVal;
}
- T(("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!\n"));
+ T(YAFFS_TRACE_ERROR,(TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
return -1;
}
+// To determine if we have enough space we just look at the
+// number of erased blocks.
+// The cache is allowed to use reserved blocks.
+
+int yaffs_CheckSpaceForChunkCache(yaffs_Device *dev)
+{
+ return (dev->nErasedBlocks >= YAFFS_RESERVED_BLOCKS);
+}
+
int yaffs_GarbageCollectBlock(yaffs_Device *dev,int block)
{
yaffs_Tags tags;
__u8 buffer[YAFFS_BYTES_PER_CHUNK];
- yaffs_BlockInfo *bi = &dev->blockInfo[block];
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,block);
yaffs_Object *object;
- T(("Collecting block %d n %d bits %x\n",block, bi->pagesInUse, bi->pageBits));
+ //T(("Collecting block %d n %d bits %x\n",block, bi->pagesInUse, bi->pageBits));
for(mask = 1,oldChunk = block * YAFFS_CHUNKS_PER_BLOCK;
mask && bi->pageBits;
// This page is in use and needs to be copied off
- T(("copying page %x from %d to %d\n",mask,oldChunk,newChunk));
+ dev->nGCCopies++;
- yaffs_ReadChunkFromNAND(dev,oldChunk,buffer, &spare);
+ //T(("copying page %x from %d to %d\n",mask,oldChunk,newChunk));
- yaffs_GetTagsFromSpare(&spare,&tags);
- tags.serialNumber++;
- yaffs_LoadTagsIntoSpare(&spare,&tags);
+ yaffs_ReadChunkFromNAND(dev,oldChunk,buffer, &spare,1);
+
+ yaffs_GetTagsFromSpare(dev,&spare,&tags);
-#if 0
- newChunk = yaffs_AllocatePage(dev,1);
- if(newChunk < 0)
+ object = yaffs_FindObjectByNumber(dev,tags.objectId);
+
+ if(object && object->deleted && tags.chunkId != 0)
{
- return YAFFS_FAIL;
+ // Data chunk in a deleted file, throw it away
+ // It's a deleted data chunk,
+ // No need to copy this, just forget about it and fix up the
+ // object.
+
+ yaffs_PutChunkIntoFile(object, tags.chunkId, 0,0);
+ object->nDataChunks--;
}
-
- yaffs_WriteChunkToNAND(dev,newChunk, buffer, &spare);
-
-#else
- newChunk = yaffs_WriteNewChunkToNAND(dev, buffer, &spare,1);
-#endif
- if(newChunk < 0)
+ else if( 0 /* Todo object && object->deleted && object->nDataChunks == 0 */)
{
- return YAFFS_FAIL;
+ // Deleted object header with no data chunks.
+ // Can be discarded
+ object->chunkId = 0;
+ //Todo some clean up
+
}
+ else if(object)
+ {
+ // It's either a data chunk in a live file or
+ // an ObjectHeader, so we're interested in it.
+ // NB Need to keep the ObjectHeaders of deleted files
+ // until the whole file has been deleted off
+ tags.serialNumber++;
+ yaffs_LoadTagsIntoSpare(&spare,&tags);
- object = yaffs_FindObjectByNumber(dev,tags.objectId);
+
+ newChunk = yaffs_WriteNewChunkToNAND(dev, buffer, &spare,1);
- // Ok, now fix up the Tnodes etc.
+ if(newChunk < 0)
+ {
+ return YAFFS_FAIL;
+ }
- if(tags.chunkId == 0)
- {
- // It's a header
- object->chunkId = newChunk;
- }
- else
- {
- // It's a data chunk
- yaffs_PutChunkIntoFile(object, tags.chunkId, newChunk,0);
-
+ // Ok, now fix up the Tnodes etc.
+
+ if(tags.chunkId == 0)
+ {
+ // It's a header
+ object->chunkId = newChunk;
+ }
+ else
+ {
+ // It's a data chunk
+ yaffs_PutChunkIntoFile(object, tags.chunkId, newChunk,0);
+ }
}
yaffs_DeleteChunk(dev,oldChunk);
return YAFFS_OK;
}
-int yaffs_CheckGarbageCollection(yaffs_Device *dev)
+
+static yaffs_Object *yaffs_FindDeletedUnlinkedFile(yaffs_Device *dev)
+{
+ // todo find a file to delete
+ struct list_head *i;
+ yaffs_Object *l;
+
+
+ // To the free chunks add the chunks that are in the deleted unlinked files.
+ list_for_each(i,&dev->unlinkedDir->variant.directoryVariant.children)
+ {
+ l = list_entry(i, yaffs_Object,siblings);
+ if(l->deleted)
+ {
+ return l;
+ }
+ }
+ return NULL;
+}
+
+static void yaffs_DoUnlinkedFileDeletion(yaffs_Device *dev)
+{
+ // This does background deletion on unlinked files.. only deleted ones.
+ // If we don't have a file we're working on then find one
+ if(!dev->unlinkedDeletion && dev->nDeletedFiles > 0)
+ {
+ dev->unlinkedDeletion = yaffs_FindDeletedUnlinkedFile(dev);
+ }
+
+ // OK, we're working on a file...
+ if(dev->unlinkedDeletion)
+ {
+ yaffs_Object *obj = dev->unlinkedDeletion;
+ int delresult;
+ int limit; // Number of chunks to delete in a file.
+ // NB this can be exceeded, but not by much.
+
+ limit = 5;
+#if 0
+ if(dev->nErasedBlocks <= (YAFFS_RESERVED_BLOCKS + YAFFS_GARBAGE_COLLECT_LOW_WATER))
+ {
+ limit = 50; // Doing GC soon, so dig deeper
+ }
+ else
+ {
+ limit = 5;
+ }
+#endif
+
+ delresult = yaffs_DeleteWorker(obj, obj->variant.fileVariant.top, obj->variant.fileVariant.topLevel, 0,&limit);
+
+ if(obj->nDataChunks == 0)
+ {
+ // Done all the deleting of data chunks.
+ // Now dump the header and clean up
+ yaffs_FreeTnode(dev,obj->variant.fileVariant.top);
+ yaffs_DoGenericObjectDeletion(obj);
+ dev->nDeletedFiles--;
+ dev->nUnlinkedFiles--;
+ dev->nBackgroundDeletions++;
+ dev->unlinkedDeletion = NULL;
+ }
+ }
+}
+
+
+
+static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
{
int block;
+ yaffs_DoUnlinkedFileDeletion(dev);
+
+ if(dev->nErasedBlocks <= (YAFFS_RESERVED_BLOCKS + YAFFS_GARBAGE_COLLECT_LOW_WATER))
+ {
+ dev->garbageCollectionRequired = 1;
+ }
+
if(dev->garbageCollectionRequired)
{
+ dev->garbageCollections++;
dev->garbageCollectionRequired = 0;
- block = yaffs_FindDirtiestBlock(dev);
+ if(dev->blockSelectedForGC >= 0)
+ {
+ block = dev->blockSelectedForGC;
+ }
+ else
+ {
+ block = yaffs_FindDirtiestBlock(dev);
+ }
+
if(block >= 0)
{
return yaffs_GarbageCollectBlock(dev,block);
sparePtr->tagByte7 = tu->asBytes[7];
}
-static void yaffs_GetTagsFromSpare(yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr)
+static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr)
{
yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
+ int result;
tu->asBytes[0]= sparePtr->tagByte0;
tu->asBytes[1]= sparePtr->tagByte1;
tu->asBytes[6]= sparePtr->tagByte6;
tu->asBytes[7]= sparePtr->tagByte7;
- yaffs_CheckECCOnTags(tagsPtr);
+ result = yaffs_CheckECCOnTags(tagsPtr);
+ if(result> 0)
+ {
+ dev->tagsEccFixed++;
+ }
+ else if(result <0)
+ {
+ dev->tagsEccUnfixed++;
+ }
}
static void yaffs_SpareInitialise(yaffs_Spare *spare)
memset(spare,0xFF,sizeof(yaffs_Spare));
}
-static int yaffs_ReadChunkTagsFromNAND(yaffs_Device *dev,int chunkInNAND, yaffs_Tags *tags)
+static int yaffs_ReadChunkTagsFromNAND(yaffs_Device *dev,int chunkInNAND, yaffs_Tags *tags, int *chunkDeleted)
{
if(tags)
{
yaffs_Spare spare;
- if(yaffs_ReadChunkFromNAND(dev,chunkInNAND,NULL,&spare) == YAFFS_OK)
+ if(yaffs_ReadChunkFromNAND(dev,chunkInNAND,NULL,&spare,1) == YAFFS_OK)
{
- yaffs_GetTagsFromSpare(&spare,tags);
+ *chunkDeleted = (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0;
+ yaffs_GetTagsFromSpare(dev,&spare,tags);
return YAFFS_OK;
}
else
yaffs_SpareInitialise(&spare);
-
+#ifndef CONFIG_YAFFS_USE_NANDECC
if(buffer)
{
yaffs_CalcECC(buffer,&spare);
}
+#endif
yaffs_LoadTagsIntoSpare(&spare,tags);
yaffs_SpareInitialise(&spare);
+#ifndef CONFIG_YAFFS_USE_NANDECC
if(buffer)
{
yaffs_CalcECC(buffer,&spare);
}
+#endif
yaffs_LoadTagsIntoSpare(&spare,tags);
}
+static int yaffs_TagsMatch(const yaffs_Tags *tags, int objectId, int chunkInObject, int chunkDeleted)
+{
+ return ( tags->chunkId == chunkInObject &&
+ tags->objectId == objectId &&
+ !chunkDeleted) ? 1 : 0;
+
+}
yaffs_Tags localTags;
int i;
int found = 0;
+ int chunkDeleted;
+
yaffs_Device *dev = in->myDev;
// Now we need to do the shifting etc and search for it
for(i = 0,found = 0; theChunk && i < dev->chunkGroupSize && !found; i++)
{
- yaffs_ReadChunkTagsFromNAND(dev,theChunk,tags);
- if(tags->chunkId == chunkInInode &&
- tags->objectId == in->objectId)
+ yaffs_ReadChunkTagsFromNAND(dev,theChunk,tags,&chunkDeleted);
+ if(yaffs_TagsMatch(tags,in->objectId,chunkInInode,chunkDeleted))
{
// found it;
found = 1;
int i;
int found = 0;
yaffs_Device *dev = in->myDev;
+ int chunkDeleted;
if(!tags)
{
// Now we need to do the shifting etc and search for it
for(i = 0,found = 0; theChunk && i < dev->chunkGroupSize && !found; i++)
{
- yaffs_ReadChunkTagsFromNAND(dev,theChunk,tags);
- if(tags->chunkId == chunkInInode &&
- tags->objectId == in->objectId)
+ yaffs_ReadChunkTagsFromNAND(dev,theChunk,tags,&chunkDeleted);
+ if(yaffs_TagsMatch(tags,in->objectId,chunkInInode,chunkDeleted))
{
// found it;
found = 1;
}
else
{
- T(("No level 0 found for %d\n", chunkInInode));
+ //T(("No level 0 found for %d\n", chunkInInode));
}
if(!found)
{
- T(("Could not find %d to delete\n",chunkInInode));
+ //T(("Could not find %d to delete\n",chunkInInode));
}
return found ? theChunk : -1;
}
-#if YAFFS_PARANOID
+#ifdef YAFFS_PARANOID
static int yaffs_CheckFileSanity(yaffs_Object *in)
{
yaffs_Tags localTags;
yaffs_Tags *tags = &localTags;
int theChunk;
+ int chunkDeleted;
if(in->variantType != YAFFS_OBJECT_TYPE_FILE)
{
- T(("Object not a file\n"));
+ //T(("Object not a file\n"));
return YAFFS_FAIL;
}
theChunk = tn->level0[chunk & YAFFS_TNODES_LEVEL0_MASK] << in->myDev->chunkGroupBits;
- yaffs_ReadChunkTagsFromNAND(in->myDev,theChunk,tags);
- if(tags->chunkId == chunk &&
- tags->objectId == in->objectId)
+ yaffs_ReadChunkTagsFromNAND(in->myDev,theChunk,tags,&chunkDeleted);
+ if(yaffs_TagsMatch(tags,in->objectId,chunk,chunkDeleted))
{
// found it;
}
else
{
- T(("No level 0 found for %d\n", chunk));
+ //T(("No level 0 found for %d\n", chunk));
}
}
yaffs_Tags newTags;
unsigned existingSerial, newSerial;
+ int newChunkDeleted;
+
tn = yaffs_AddOrFindLevel0Tnode(dev,&in->variant.fileVariant, chunkInInode);
+ if(!tn)
+ {
+ return YAFFS_FAIL;
+ }
+
+ existingChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK];
if(inScan)
{
// happen when the power fails during a write, then only one
// chunk should ever be affected.
- existingChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK];
if(existingChunk != 0)
{
+ // NB Right now existing chunk will not be real chunkId if the device >= 32MB
+ // thus we have to do a FindChunkInFile to get the real chunk id.
+ //
// We have a duplicate now we need to decide which one to use
// To do this we get both sets of tags and compare serial numbers.
- yaffs_ReadChunkTagsFromNAND(dev,chunkInInode, &newTags);
- yaffs_ReadChunkTagsFromNAND(dev,existingChunk, &existingTags);
+ yaffs_ReadChunkTagsFromNAND(dev,chunkInNAND, &newTags,&newChunkDeleted);
+
+
+ // Do a proper find
+ existingChunk = yaffs_FindChunkInFile(in,chunkInInode, &existingTags);
+
+ if(existingChunk <=0)
+ {
+ //Hoosterman - how did this happen?
+
+ T(YAFFS_TRACE_ERROR, (TSTR("yaffs tradgedy: existing chunk < 0 in scan" TENDSTR)));
+
+ }
+
+
+ // NB The deleted flags should be false, otherwise the chunks will
+ // not be loaded during a scan
+
newSerial = newTags.serialNumber;
existingSerial = existingTags.serialNumber;
- if(((existingSerial+1) & 3) == newSerial)
+
+ if( existingChunk <= 0 ||
+ ((existingSerial+1) & 3) == newSerial)
{
// Use new
// Delete the old one and drop through to update the tnode
{
// Use existing.
// Delete the new one and return early so that the tnode isn't changed
- yaffs_DeleteChunk(dev,chunkInInode);
+ yaffs_DeleteChunk(dev,chunkInNAND);
return YAFFS_OK;
}
}
+
+ }
+
+ if(existingChunk == 0)
+ {
+ in->nDataChunks++;
}
- tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = chunkInNAND;
+ tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = (chunkInNAND >> dev->chunkGroupBits);
return YAFFS_OK;
}
if(chunkInNAND >= 0)
{
- return yaffs_ReadChunkFromNAND(in->myDev,chunkInNAND,buffer,NULL);
+ return yaffs_ReadChunkFromNAND(in->myDev,chunkInNAND,buffer,NULL,1);
}
else
{
static void yaffs_DeleteChunk(yaffs_Device *dev,int chunkId)
{
- int block = chunkId / YAFFS_CHUNKS_PER_BLOCK;
- int page = chunkId % YAFFS_CHUNKS_PER_BLOCK;
+ int block;
+ int page;
yaffs_Spare spare;
+ yaffs_BlockInfo *bi;
+
+ if(chunkId <= 0) return;
+ block = chunkId / YAFFS_CHUNKS_PER_BLOCK;
+ page = chunkId % YAFFS_CHUNKS_PER_BLOCK;
yaffs_SpareInitialise(&spare);
spare.pageStatus = 0; // To mark it as deleted.
yaffs_WriteChunkToNAND(dev,chunkId,NULL,&spare);
+ yaffs_HandleUpdateChunk(dev,chunkId,&spare);
+ bi = yaffs_GetBlockInfo(dev,block);
// Pull out of the management area.
// If the whole block became dirty, this will kick off an erasure.
- if( dev->blockInfo[block].blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
- dev->blockInfo[block].blockState == YAFFS_BLOCK_STATE_FULL)
+ if( bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
+ bi->blockState == YAFFS_BLOCK_STATE_FULL)
{
dev->nFreeChunks++;
- dev->blockInfo[block].pageBits &= ~(1 << page);
- dev->blockInfo[block].pagesInUse--;
+ bi->pageBits &= ~(1 << page);
+ bi->pagesInUse--;
- if( dev->blockInfo[block].pagesInUse == 0 &&
- dev->blockInfo[block].blockState == YAFFS_BLOCK_STATE_FULL)
+ if(bi->pagesInUse == 0 &&
+ bi->blockState == YAFFS_BLOCK_STATE_FULL)
{
yaffs_BlockBecameDirty(dev,block);
}
}
else
{
- T(("Bad news deleting chunk %d\n",chunkId));
+ // T(("Bad news deleting chunk %d\n",chunkId));
}
}
yaffs_CalcTagsECC(&newTags);
-
- #if 0
- // Create new chunk in NAND
- newChunkId = yaffs_AllocatePage(dev,useReserve);
-
-
- if(newChunkId >= 0)
- {
-
-
- yaffs_WriteChunkWithTagsToNAND(dev,newChunkId,buffer,&newTags);
-
- yaffs_PutChunkIntoFile(in,chunkInInode,newChunkId);
-
-
- if(prevChunkId >= 0)
- {
- yaffs_DeleteChunk(dev,prevChunkId);
-
- }
-
- yaffs_CheckFileSanity(in);
-
- return newChunkId;
- }
-
-
- return -1;
-#else
-
newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,buffer,&newTags,useReserve);
if(newChunkId >= 0)
{
}
return newChunkId;
-#endif
+
// UpdateObjectHeader updates the header on NAND for an object.
// If name is not NULL, then that new name is used.
//
-int yaffs_UpdateObjectHeader(yaffs_Object *in,const char *name)
+int yaffs_UpdateObjectHeader(yaffs_Object *in,const char *name, int force)
{
yaffs_Device *dev = in->myDev;
yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)bufferNew;
yaffs_ObjectHeader *ohOld = (yaffs_ObjectHeader *)bufferOld;
+
- if(!in->fake)
+ if(!in->fake || force)
{
yaffs_CheckGarbageCollection(dev);
if(prevChunkId >= 0)
{
- yaffs_ReadChunkFromNAND(dev,prevChunkId,bufferOld,NULL);
+ yaffs_ReadChunkFromNAND(dev,prevChunkId,bufferOld,NULL,1);
}
// Header data
oh->type = in->variantType;
-
+
oh->st_mode = in->st_mode;
+
+#ifdef CONFIG_YAFFS_WINCE
+ oh->win_atime[0] = in->win_atime[0];
+ oh->win_ctime[0] = in->win_ctime[0];
+ oh->win_mtime[0] = in->win_mtime[0];
+ oh->win_atime[1] = in->win_atime[1];
+ oh->win_ctime[1] = in->win_ctime[1];
+ oh->win_mtime[1] = in->win_mtime[1];
+#else
oh->st_uid = in->st_uid;
oh->st_gid = in->st_gid;
oh->st_atime = in->st_atime;
oh->st_mtime = in->st_mtime;
oh->st_ctime = in->st_ctime;
-
- oh->parentObjectId = in->parent->objectId;
- oh->sum = in->sum;
+ oh->st_rdev = in->st_rdev;
+#endif
+ if(in->parent)
+ {
+ oh->parentObjectId = in->parent->objectId;
+ }
+ else
+ {
+ oh->parentObjectId = 0;
+ }
+
+ //oh->sum = in->sum;
if(name && *name)
{
memset(oh->name,0,YAFFS_MAX_NAME_LENGTH + 1);
strncpy(oh->name,name,YAFFS_MAX_NAME_LENGTH);
}
- else
+ else if(prevChunkId)
{
memcpy(oh->name, ohOld->name,YAFFS_MAX_NAME_LENGTH + 1);
}
+ else
+ {
+ memset(oh->name,0,YAFFS_MAX_NAME_LENGTH + 1);
+ }
switch(in->variantType)
{
case YAFFS_OBJECT_TYPE_HARDLINK:
oh->equivalentObjectId = in->variant.hardLinkVariant.equivalentObjectId;
break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ // Do nothing
+ break;
case YAFFS_OBJECT_TYPE_DIRECTORY:
// Do nothing
break;
yaffs_CalcTagsECC(&newTags);
-
-
-#if 0
+
// Create new chunk in NAND
- newChunkId = yaffs_AllocatePage(dev,1);
+ newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,bufferNew,&newTags,1);
if(newChunkId >= 0)
{
-
- yaffs_WriteChunkWithTagsToNAND(dev,newChunkId,bufferNew,&newTags);
in->chunkId = newChunkId;
}
in->dirty = 0;
- return newChunkId;
}
-
- return -1;
-#else
- // Create new chunk in NAND
- newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,bufferNew,&newTags,1);
-
- if(newChunkId >= 0)
- {
- in->chunkId = newChunkId;
+ return newChunkId;
+
+ }
+ return 0;
+}
+
+
+/////////////////////// Short Operations Cache ////////////////////////////////
+// In many siturations where there is no high level buffering (eg WinCE) a lot of
+// reads might be short sequential reads, and a lot of writes may be short
+// sequential writes. eg. scanning/writing a jpeg file.
+// In these cases, a short read/write cache can provide a huge perfomance benefit
+// with dumb-as-a-rock code.
+// There are a limited number (~10) of cache chunks per device so that we don't
+// need a very intelligent search.
+
+
+#ifdef CONFIG_YAFFS_SHORT_OP_CACHE
+
+
+static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
+{
+ yaffs_Device *dev = obj->myDev;
+ int lowest;
+ int i;
+ yaffs_ChunkCache *cache;
+ int chunkWritten;
+ int nBytes;
+
+ do{
+ cache = NULL;
- if(prevChunkId >= 0)
+ // Find the dirty cache for this object with the lowest chunk id.
+ for(i = 0; i < YAFFS_N_CACHE_CHUNKS; i++)
+ {
+ if(dev->srCache[i].object == obj &&
+ dev->srCache[i].dirty)
{
- yaffs_DeleteChunk(dev,prevChunkId);
+ if(!cache || dev->srCache[i].chunkId < lowest)
+ {
+ cache = &dev->srCache[i];
+ lowest = cache->chunkId;
+ }
}
+ }
- in->dirty = 0;
+ if(cache)
+ {
+ //Write it out
+
+ nBytes = cache->object->variant.fileVariant.fileSize - ((cache->chunkId -1) * YAFFS_BYTES_PER_CHUNK);
+
+ if(nBytes > YAFFS_BYTES_PER_CHUNK)
+ {
+ nBytes= YAFFS_BYTES_PER_CHUNK;
+ }
+
+ chunkWritten = yaffs_WriteChunkDataToObject(cache->object,
+ cache->chunkId,
+ cache->data,
+ nBytes,1);
+
+ cache->dirty = 0;
}
- return newChunkId;
+ } while(cache && chunkWritten > 0);
+
+ if(cache)
+ {
+ //Hoosterman, disk full while writing cache out.
+ T(YAFFS_TRACE_ERROR, (TSTR("yaffs tradgedy: no space during caceh write" TENDSTR)));
-#endif
- }
- return 0;
+ }
+
}
+// Grab us a chunk for use.
+// First look for an empty one.
+// Then look for the least recently used non-dirty one.
+// Then look for the least recently used dirty one...., flush and look again.
+static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
+{
+ int i;
+ int usage;
+ int theOne;
+
+ for(i = 0; i < YAFFS_N_CACHE_CHUNKS; i++)
+ {
+ if(!dev->srCache[i].object)
+ {
+ //T(("Grabbing empty %d\n",i));
+
+ return &dev->srCache[i];
+ }
+ }
+
+ theOne = -1;
+ usage = 0; // just to stop the compiler grizzling
+
+ for(i = 0; i < YAFFS_N_CACHE_CHUNKS; i++)
+ {
+ if(!dev->srCache[i].dirty &&
+ ((dev->srCache[i].lastUse < usage && theOne >= 0)||
+ theOne < 0))
+ {
+ usage = dev->srCache[i].lastUse;
+ theOne = i;
+ }
+ }
+
+ //T(("Grabbing non-empty %d\n",theOne));
+ return theOne >= 0 ? &dev->srCache[theOne] : NULL;
+
+}
+
+
+static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
+{
+ yaffs_ChunkCache *cache;
+ yaffs_Object *theObj;
+ int usage;
+ int i;
+
+ // Try find a non-dirty one...
+
+ cache = yaffs_GrabChunkCacheWorker(dev);
+
+ if(!cache)
+ {
+ // They were all dirty, find the last recently used object and flush
+ // its cache, then find again.
+ // NB what's here is not very accurate, we actually flush the object
+ // the last recently used page.
+
+ theObj = dev->srCache[0].object;
+ usage = dev->srCache[0].lastUse;
+
+ for(i = 1; i < YAFFS_N_CACHE_CHUNKS; i++)
+ {
+ if( dev->srCache[i].object &&
+ dev->srCache[i].lastUse < usage)
+ {
+ usage = dev->srCache[i].lastUse;
+ theObj = dev->srCache[i].object;
+ }
+ }
+
+ yaffs_FlushFilesChunkCache(theObj);
+
+ // Try again
+ cache = yaffs_GrabChunkCacheWorker(dev);
+ }
+
+ return cache;
+
+}
+
+
+// Find a cached chunk
+static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj, int chunkId)
+{
+ yaffs_Device *dev = obj->myDev;
+ int i;
+
+ for(i = 0; i < YAFFS_N_CACHE_CHUNKS; i++)
+ {
+ if(dev->srCache[i].object == obj &&
+ dev->srCache[i].chunkId == chunkId)
+ {
+ dev->cacheHits++;
+
+ return &dev->srCache[i];
+ }
+ }
+
+ return NULL;
+}
+
+// Mark the chunk for the least recently used algorithym
+static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache, int isAWrite)
+{
+ if( dev->srLastUse < 0 ||
+ dev->srLastUse > 100000000)
+ {
+ // Reset the cache usages
+ int i;
+ for(i = 1; i < YAFFS_N_CACHE_CHUNKS; i++)
+ {
+ dev->srCache[i].lastUse = 0;
+ }
+ dev->srLastUse = 0;
+ }
+
+ dev->srLastUse++;
+
+ cache->lastUse = dev->srLastUse;
+
+ if(isAWrite)
+ {
+ cache->dirty = 1;
+ }
+}
+
+// Invalidate a single cache page.
+// Do this when a whole page gets written,
+// ie the short cache for this page is no longer valid.
+static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
+{
+ yaffs_ChunkCache *cache = yaffs_FindChunkCache(object,chunkId);
+
+ if(cache)
+ {
+ cache->object = NULL;
+ }
+}
+
+
+// Invalidate all the cache pages associated with this object
+// Do this whenever ther file is deleted or resized.
+static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
+{
+ int i;
+ yaffs_Device *dev = in->myDev;
+
+ // Now invalidate it.
+ for(i = 0; i < YAFFS_N_CACHE_CHUNKS; i++)
+ {
+ if(dev->srCache[i].object == in)
+ {
+ dev->srCache[i].object = NULL;
+ }
+ }
+}
+
+
+#else
+// Stubs for disabling short op caching
+
+static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
+{}
+
+static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
+{
+ return NULL;
+}
+
+
+static yaffs_ChunkCache *yaffs_FindChunkCache(yaffs_Device *dev, int objectId, int chunkId)
+{
+ return NULL;
+}
+
+static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache)
+{
+}
+
+static void yaffs_InvalidateChunkCache(yaffs_Object *obj, int chunkId)
+{
+}
+
+static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
+{
+}
+
+
+
+#endif
+
+
///////////////////////// File read/write ///////////////////////////////
// Read and write have very similar structures.
int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 * buffer, __u32 offset, int nBytes)
{
-// yaffs_Device *dev = in->myDev;
-
- __u8 localBuffer[YAFFS_BYTES_PER_CHUNK];
int chunk;
int start;
int n = nBytes;
int nDone = 0;
+ yaffs_Device *dev;
+
+ dev = in->myDev;
+
while(n > 0)
{
chunk = offset / YAFFS_BYTES_PER_CHUNK + 1; // The first chunk is 1
if(nToCopy != YAFFS_BYTES_PER_CHUNK)
{
// An incomplete start or end chunk (or maybe both start and end chunk)
+#ifdef CONFIG_YAFFS_SHORT_OP_CACHE
+ yaffs_ChunkCache *cache;
+ // If we can't find the data in the cache, then load it up.
+ cache = yaffs_FindChunkCache(in,chunk);
+ if(!cache)
+ {
+ cache = yaffs_GrabChunkCache(in->myDev);
+ cache->object = in;
+ cache->chunkId = chunk;
+ cache->dirty = 0;
+ yaffs_ReadChunkDataFromObject(in,chunk,cache->data);
+ }
+
+ yaffs_UseChunkCache(dev,cache,0);
+
+ memcpy(buffer,&cache->data[start],nToCopy);
+#else
// Read into the local buffer then copy...
-
- yaffs_ReadChunkDataFromObject(in,chunk,localBuffer);
- memcpy(buffer,&localBuffer[start],nToCopy);
+ yaffs_ReadChunkDataFromObject(in,chunk,dev->localBuffer);
+ memcpy(buffer,&dev->localBuffer[start],nToCopy);
+#endif
}
else
{
+#ifdef CONFIG_YAFFS_WINCE
+
+ // Under WinCE can't do direct transfer. Need to use a local buffer.
+ // This is because we otherwise screw up WinCE's memory mapper
+ yaffs_ReadChunkDataFromObject(in,chunk,dev->localBuffer);
+ memcpy(buffer,dev->localBuffer,YAFFS_BYTES_PER_CHUNK);
+#else
// A full chunk. Read directly into the supplied buffer.
yaffs_ReadChunkDataFromObject(in,chunk,buffer);
+#endif
}
n -= nToCopy;
}
+
int yaffs_WriteDataToFile(yaffs_Object *in,const __u8 * buffer, __u32 offset, int nBytes)
{
- __u8 localBuffer[YAFFS_BYTES_PER_CHUNK];
int chunk;
int start;
int n = nBytes;
int nDone = 0;
int nToWriteBack;
- int endOfWrite = offset+nBytes;
+ int startOfWrite = offset;
int chunkWritten = 0;
+ int nBytesRead;
+
+ yaffs_Device *dev;
+
+ dev = in->myDev;
+
while(n > 0 && chunkWritten >= 0)
{
// OK now check for the curveball where the start and end are in
// the same chunk.
+
if( (start + n) < YAFFS_BYTES_PER_CHUNK)
{
nToCopy = n;
- nToWriteBack = (start + n);
+
+ // Now folks, to calculate how many bytes to write back....
+ // If we're overwriting and not writing to then end of file then
+ // we need to write back as much as was there before.
+
+ nBytesRead = in->variant.fileVariant.fileSize - ((chunk -1) * YAFFS_BYTES_PER_CHUNK);
+
+ if(nBytesRead > YAFFS_BYTES_PER_CHUNK)
+ {
+ nBytesRead = YAFFS_BYTES_PER_CHUNK;
+ }
+
+ nToWriteBack = (nBytesRead > (start + n)) ? nBytesRead : (start +n);
+
}
else
{
if(nToCopy != YAFFS_BYTES_PER_CHUNK)
{
+ // An incomplete start or end chunk (or maybe both start and end chunk)
+#ifdef CONFIG_YAFFS_SHORT_OP_CACHE
+ yaffs_ChunkCache *cache;
+ // If we can't find the data in the cache, then load it up.
+ cache = yaffs_FindChunkCache(in,chunk);
+ if(!cache && yaffs_CheckSpaceForChunkCache(in->myDev))
+ {
+ cache = yaffs_GrabChunkCache(in->myDev);
+ cache->object = in;
+ cache->chunkId = chunk;
+ cache->dirty = 0;
+ yaffs_ReadChunkDataFromObject(in,chunk,cache->data);
+ }
+
+ if(cache)
+ {
+ yaffs_UseChunkCache(dev,cache,1);
+ memcpy(&cache->data[start],buffer,nToCopy);
+ }
+ else
+ {
+ chunkWritten = -1; // fail the write
+ }
+#else
+
+
// An incomplete start or end chunk (or maybe both start and end chunk)
// Read into the local buffer then copy, then copy over and write back.
- yaffs_ReadChunkDataFromObject(in,chunk,localBuffer);
+ yaffs_ReadChunkDataFromObject(in,chunk,dev->localBuffer);
- memcpy(&localBuffer[start],buffer,nToCopy);
+ memcpy(&dev->localBuffer[start],buffer,nToCopy);
- chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,localBuffer,nToWriteBack,0);
+ chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,dev->localBuffer,nToWriteBack,0);
- T(("Write with readback to chunk %d %d\n",chunk,chunkWritten));
+ //T(("Write with readback to chunk %d %d start %d copied %d wrote back %d\n",chunk,chunkWritten,start, nToCopy, nToWriteBack));
+#endif
}
else
{
+
+#ifdef CONFIG_YAFFS_WINCE
+ // Under WinCE can't do direct transfer. Need to use a local buffer.
+ // This is because we otherwise screw up WinCE's memory mapper
+ memcpy(dev->localBuffer,buffer,YAFFS_BYTES_PER_CHUNK);
+ chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,dev->localBuffer,YAFFS_BYTES_PER_CHUNK,0);
+#else
// A full chunk. Write directly from the supplied buffer.
chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,buffer,YAFFS_BYTES_PER_CHUNK,0);
- T(("Write to chunk %d %d\n",chunk,chunkWritten));
+#endif
+ // Since we've overwritten the cached data, we better invalidate it.
+ yaffs_InvalidateChunkCache(in,chunk);
+ //T(("Write to chunk %d %d\n",chunk,chunkWritten));
}
if(chunkWritten >= 0)
// Update file object
- if(endOfWrite > in->variant.fileVariant.fileSize)
+ if((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
{
- in->variant.fileVariant.fileSize = endOfWrite;
+ in->variant.fileVariant.fileSize = (startOfWrite + nDone);
}
in->dirty = 1;
- in->st_mtime = CURRENT_TIME;
return nDone;
}
int i;
int chunkId;
int oldFileSize = in->variant.fileVariant.fileSize;
- int sizeOfLastChunk = newSize % YAFFS_BYTES_PER_CHUNK;
+ int sizeOfPartialChunk = newSize % YAFFS_BYTES_PER_CHUNK;
yaffs_Device *dev = in->myDev;
- __u8 localBuffer[YAFFS_BYTES_PER_CHUNK];
+
+ yaffs_FlushFilesChunkCache(in);
+ yaffs_InvalidateWholeChunkCache(in);
if(in->variantType != YAFFS_OBJECT_TYPE_FILE)
{
if(newSize < oldFileSize)
{
- int lastDel = 1 + oldFileSize/YAFFS_BYTES_PER_CHUNK;
+ int lastDel = 1 + (oldFileSize-1)/YAFFS_BYTES_PER_CHUNK;
int startDel = 1 + (newSize + YAFFS_BYTES_PER_CHUNK - 1)/
YAFFS_BYTES_PER_CHUNK;
- for(i = startDel; i <= lastDel; i++)
+ // Delete backwards so that we don't end up with holes if
+ // power is lost part-way through the operation.
+ for(i = lastDel; i >= startDel; i--)
{
// NB this could be optimised somewhat,
// eg. could retrieve the tags and write them without
// using yaffs_DeleteChunk
+
chunkId = yaffs_FindAndDeleteChunkInFile(in,i,NULL);
- if(chunkId < 0 || chunkId >= (dev->endBlock * 32))
+ if(chunkId <= 0 || chunkId >= (dev->endBlock * 32))
{
- T(("Found daft chunkId %d for %d\n",chunkId,i));
+ //T(("Found daft chunkId %d for %d\n",chunkId,i));
}
else
{
+ in->nDataChunks--;
yaffs_DeleteChunk(dev,chunkId);
}
}
- if(sizeOfLastChunk != 0)
+ if(sizeOfPartialChunk != 0)
{
int lastChunk = 1+ newSize/YAFFS_BYTES_PER_CHUNK;
// Got to read and rewrite the last chunk with its new size.
- yaffs_ReadChunkDataFromObject(in,lastChunk,localBuffer);
+ yaffs_ReadChunkDataFromObject(in,lastChunk,dev->localBuffer);
- yaffs_WriteChunkDataToObject(in,lastChunk,localBuffer,sizeOfLastChunk,1);
+ yaffs_WriteChunkDataToObject(in,lastChunk,dev->localBuffer,sizeOfPartialChunk,1);
}
int retVal;
if(in->dirty)
{
- T(("flushing object header\n"));
- retVal = yaffs_UpdateObjectHeader(in,NULL);
+ //T(("flushing object header\n"));
+
+ yaffs_FlushFilesChunkCache(in);
+
+#ifdef CONFIG_YAFFS_WINCE
+ yfsd_WinFileTimeNow(in->win_mtime);
+#else
+ in->st_mtime = CURRENT_TIME;
+#endif
+
+ retVal = yaffs_UpdateObjectHeader(in,NULL,0);
}
else
{
static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
{
+
+ // First off, invalidate the file's data in the cache, without flushing.
+ yaffs_InvalidateWholeChunkCache(in);
+
yaffs_RemoveObjectFromDirectory(in);
yaffs_DeleteChunk(in->myDev,in->chunkId);
+#ifdef __KERNEL__
+ if(in->myInode)
+ {
+ in->myInode->u.generic_ip = NULL;
+ in->myInode = 0;
+ }
+#endif
yaffs_FreeObject(in);
return YAFFS_OK;
// yaffs_DeleteFile deletes the whole file data
// and the inode associated with the file.
// It does not delete the links associated with the file.
-static int yaffs_DeleteFile(yaffs_Object *in)
+static int yaffs_UnlinkFile(yaffs_Object *in)
{
+
+#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND_DELETION
// Delete the file data & tnodes
- yaffs_ResizeFile(in,0);
+
+ yaffs_DeleteWorker(in, in->variant.fileVariant.top, in->variant.fileVariant.topLevel, 0,NULL);
+
+
yaffs_FreeTnode(in->myDev,in->variant.fileVariant.top);
return yaffs_DoGenericObjectDeletion(in);
+#else
+ int retVal;
+ int immediateDeletion=0;
+ retVal = yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,NULL,0);
+ if(retVal == YAFFS_OK)
+ {
+ //in->unlinked = 1;
+ //in->myDev->nUnlinkedFiles++;
+ //in->renameAllowed = 0;
+#ifdef __KERNEL__
+ if(!in->myInode)
+ {
+ immediateDeletion = 1;
+
+ }
+#endif
+#ifdef CONFIG_YAFFS_WINCE
+ if(in->inUse <= 0)
+ {
+ immediateDeletion = 1;
+
+ }
+#endif
+
+ if(immediateDeletion)
+ {
+ T(YAFFS_TRACE_TRACING,(TSTR("yaffs: immediate deletion of file %d" TENDSTR),in->objectId));
+ in->deleted=1;
+ in->myDev->nDeletedFiles++;
+ }
+
+ }
+ return retVal;
+
+
+#endif
+}
+
+int yaffs_DeleteFile(yaffs_Object *in)
+{
+ int retVal = YAFFS_OK;
+ if(!in->unlinked)
+ {
+ retVal = yaffs_UnlinkFile(in);
+ }
+ if(retVal == YAFFS_OK &&
+ in->unlinked &&
+ !in->deleted)
+ {
+ in->deleted = 1;
+ in->myDev->nDeletedFiles++;
+ }
+ return in->deleted ? YAFFS_OK : YAFFS_FAIL;
}
static int yaffs_DeleteDirectory(yaffs_Object *in)
}
else if(!list_empty(&obj->hardLinks))
{
-#if 0
- // Curve ball: We're unlinking an object that has a hardlink.
- // Therefore we can't really delete the object.
- // Instead, we do the following:
- // - Select a hardlink.
- // - Re-type a hardlink as the equivalent object and populate the fields, including the
- // objectId. Updating the object id is important so that all the hardlinks do not need
- // to be rewritten.
- // - Update the equivalet object pointers.
- // - Delete all object.
-
- yaffs_Object *hl;
- struct list_head *i;
-
-
- yaffs_RemoveObjectFromDirectory(obj);
-
-
-
- hl = list_entry(obj->hardLinks.next, yaffs_Object,hardLinks);
-
- hl->dirty = 1;
- hl->st_mode = obj->st_mode;
- hl->st_uid = obj->st_uid;
- hl->st_gid = obj->st_gid;
- hl->st_atime = obj->st_atime;
- hl->st_mtime = obj->st_mtime;
- hl->st_ctime = obj->st_ctime;
-
- hl->variantType = obj->variantType;
-
- switch(hl->variantType)
- {
- case YAFFS_OBJECT_TYPE_FILE:
- case YAFFS_OBJECT_TYPE_SYMLINK:
- // These types are OK to just copy across.
- hl->variant = obj->variant;
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- // Fix the list up
- list_add(&hl->variant.directoryVariant.children,
- &obj->variant.directoryVariant.children);
- list_del(&obj->variant.directoryVariant.children);
-
- // Now change all the directory children to point to the new parent.
- list_for_each(i,&hl->variant.directoryVariant.children)
- {
- list_entry(i,yaffs_Object,siblings)->parent = hl;
- }
- break;
-
- case YAFFS_OBJECT_TYPE_HARDLINK:
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- // Should not be either of these types.
- }
-
- // Now fix up the hardlink chain
- list_del(&obj->hardLinks);
-
- list_for_each(i,&hl->hardLinks)
- {
- list_entry(i,yaffs_Object,hardLinks)->variant.hardLinkVariant.equivalentObject = hl;
- list_entry(i,yaffs_Object,hardLinks)->variant.hardLinkVariant.equivalentObjectId = hl->objectId;
- }
-
- // Now fix up the hash links.
- yaffs_UnhashObject(hl);
- hl->objectId = obj->objectId;
- yaffs_HashObject(hl);
-
- // Update the hardlink which has become an object
- yaffs_UpdateObjectHeader(hl,NULL);
-
- // Finally throw away the deleted object
- yaffs_DeleteChunk(obj->myDev,obj->chunkId);
- yaffs_FreeObject(obj);
-
- return YAFFS_OK;
-#else
// Curve ball: We're unlinking an object that has a hardlink.
//
// This problem arises because we are not strictly following
yaffs_GetObjectName(hl,name,YAFFS_MAX_NAME_LENGTH+1);
- retVal = yaffs_ChangeObjectName(obj, hl->parent, name);
+ retVal = yaffs_ChangeObjectName(obj, hl->parent, name,0);
if(retVal == YAFFS_OK)
{
retVal = yaffs_DoGenericObjectDeletion(hl);
}
return retVal;
-
-#endif
-
}
else
switch(obj->variantType)
{
case YAFFS_OBJECT_TYPE_FILE:
- return yaffs_DeleteFile(obj);
+ return yaffs_UnlinkFile(obj);
break;
case YAFFS_OBJECT_TYPE_DIRECTORY:
return yaffs_DeleteDirectory(obj);
//////////////// Initialisation Scanning /////////////////
+
+// For now we use the SmartMedia check.
+// We look at the blockStatus byte in the first two chunks
+// These must be 0xFF to pass as OK.
+// todo: this function needs to be modifyable foir different NAND types
+// and different chunk sizes. Suggest make this into a per-device configurable
+// function.
+static int yaffs_IsBlockBad(yaffs_Device *dev, int blk)
+{
+ yaffs_Spare spare;
+
+ yaffs_ReadChunkFromNAND(dev,blk * YAFFS_CHUNKS_PER_BLOCK,NULL,&spare,1);
+#if 1
+ if(yaffs_CountBits(spare.blockStatus) < 7)
+ {
+ return 1;
+ }
+#else
+ if(spare.blockStatus != 0xFF)
+ {
+ return 1;
+ }
+#endif
+ yaffs_ReadChunkFromNAND(dev,blk * YAFFS_CHUNKS_PER_BLOCK + 1,NULL,&spare,1);
+
+#if 1
+ if(yaffs_CountBits(spare.blockStatus) < 7)
+ {
+ return 1;
+ }
+#else
+ if(spare.blockStatus != 0xFF)
+ {
+ return 1;
+ }
+#endif
+
+ return 0;
+
+}
+
static int yaffs_Scan(yaffs_Device *dev)
{
yaffs_Spare spare;
yaffs_BlockState state;
yaffs_Object *hardList = NULL;
yaffs_Object *hl;
-
-// int inuse;
-// __u32 pageBits;
+ yaffs_BlockInfo *bi;
+
yaffs_ObjectHeader *oh;
yaffs_Object *in;
for(blk = dev->startBlock; blk <= dev->endBlock; blk++)
{
deleted = 0;
- dev->blockInfo[blk].pageBits = 0;
- dev->blockInfo[blk].pagesInUse = 0;
+ bi = yaffs_GetBlockInfo(dev,blk);
+ bi->pageBits = 0;
+ bi->pagesInUse = 0;
state = YAFFS_BLOCK_STATE_SCANNING;
+
+ if(yaffs_IsBlockBad(dev,blk))
+ {
+ state = YAFFS_BLOCK_STATE_DEAD;
+ T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("block %d is bad" TENDSTR),blk));
+ }
+
// Read each chunk in the block.
for(c = 0; c < YAFFS_CHUNKS_PER_BLOCK &&
// Read the spare area and decide what to do
chunk = blk * YAFFS_CHUNKS_PER_BLOCK + c;
- yaffs_ReadChunkFromNAND(dev,chunk,NULL,&spare);
+ yaffs_ReadChunkFromNAND(dev,chunk,NULL,&spare,1);
- // Is this a valid block?
- if(yaffs_countBits[spare.blockStatus] >= 7)
+ // This block looks ok, now what's in this chunk?
+ yaffs_GetTagsFromSpare(dev,&spare,&tags);
+
+ if(yaffs_CountBits(spare.pageStatus) < 6)
+ {
+ // A deleted chunk
+ deleted++;
+ dev->nFreeChunks ++;
+ //T((" %d %d deleted\n",blk,c));
+ }
+ else if(tags.objectId == YAFFS_UNUSED_OBJECT_ID)
{
- // This block looks ok, now what's in this chunk?
- yaffs_GetTagsFromSpare(&spare,&tags);
+ // An unassigned chunk in the block
+ // This means that either the block is empty or
+ // this is the one being allocated from
- if(yaffs_countBits[spare.pageStatus] < 6)
+ if(c == 0)
+ {
+ // 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->nFreeChunks += (YAFFS_CHUNKS_PER_BLOCK - c);
+ }
+ else if(tags.chunkId > 0)
+ {
+ int endpos;
+ // A data chunk.
+ bi->pageBits |= (1 << 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).
+ yaffs_PutChunkIntoFile(in,tags.chunkId,chunk,1);
+ endpos = (tags.chunkId - 1)* YAFFS_BYTES_PER_CHUNK + tags.byteCount;
+ if(in->variant.fileVariant.scannedFileSize <endpos)
{
- // A deleted chunk
- deleted++;
- dev->nFreeChunks ++;
- T((" %d %d deleted\n",blk,c));
+ in->variant.fileVariant.scannedFileSize = endpos;
+#ifndef CONFIG_YAFFS_USE_HEADER_FILE_SIZE
+ in->variant.fileVariant.fileSize =
+ in->variant.fileVariant.scannedFileSize;
+#endif
+
}
- else if(tags.objectId == YAFFS_UNUSED_OBJECT_ID)
+ //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
+ bi->pageBits |= (1 << c);
+ bi->pagesInUse++;
+
+ yaffs_ReadChunkFromNAND(dev,chunk,chunkData,NULL,1);
+
+ oh = (yaffs_ObjectHeader *)chunkData;
+
+ in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,oh->type);
+
+ if(in->valid)
{
- // An unassigned chunk in the block
- // This means that either the block is empty or
- // this is the one being allocated from
+ // We have already filled this one. We have a duplicate and need to resolve it.
- if(c == 0)
+ unsigned existingSerial = in->serial;
+ unsigned newSerial = tags.serialNumber;
+
+ if(((existingSerial+1) & 3) == newSerial)
{
- // the block is unused
- state = YAFFS_BLOCK_STATE_EMPTY;
- dev->nErasedBlocks++;
+ // Use new one - destroy the exisiting one
+ yaffs_DeleteChunk(dev,in->chunkId);
+ in->valid = 0;
}
else
{
- // this is the block being allocated from
- T((" allocating %d %d\n",blk,c));
- state = YAFFS_BLOCK_STATE_ALLOCATING;
- dev->allocationBlock = blk;
- dev->allocationPage = c;
+ // Use existing - destroy this one.
+ yaffs_DeleteChunk(dev,chunk);
}
-
- dev->nFreeChunks += (YAFFS_CHUNKS_PER_BLOCK - c);
}
- else if(tags.chunkId > 0)
+
+ if(!in->valid &&
+ (tags.objectId == YAFFS_OBJECTID_ROOT ||
+ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))
{
- // A data chunk.
- dev->blockInfo[blk].pageBits |= (1 << c);
- dev->blockInfo[blk].pagesInUse++;
-
- in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,YAFFS_OBJECT_TYPE_FILE);
- // PutChunkIntoFIle checks for a clash (two data chunks with
- // the same chunkId).
- yaffs_PutChunkIntoFile(in,tags.chunkId,chunk,1);
- T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId));
+ // We only load some info, don't fiddle with directory structure
+ in->valid = 1;
+ in->variantType = oh->type;
+
+ in->st_mode = oh->st_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->st_uid = oh->st_uid;
+ in->st_gid = oh->st_gid;
+ in->st_atime = oh->st_atime;
+ in->st_mtime = oh->st_mtime;
+ in->st_ctime = oh->st_ctime;
+ in->st_rdev = oh->st_rdev;
+#endif
+ in->chunkId = chunk;
+
}
- else
+ else if(!in->valid)
{
- // chunkId == 0, so it is an ObjectHeader.
- // Thus, we read in the object header and make the object
- dev->blockInfo[blk].pageBits |= (1 << c);
- dev->blockInfo[blk].pagesInUse++;
-
- yaffs_ReadChunkFromNAND(dev,chunk,chunkData,NULL);
-
- oh = (yaffs_ObjectHeader *)chunkData;
-
- in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,oh->type);
-
- if(in->valid)
+ // we need to load this info
+
+ in->valid = 1;
+ in->variantType = oh->type;
+
+ in->st_mode = oh->st_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->st_uid = oh->st_uid;
+ in->st_gid = oh->st_gid;
+ in->st_atime = oh->st_atime;
+ in->st_mtime = oh->st_mtime;
+ in->st_ctime = oh->st_ctime;
+ in->st_rdev = oh->st_rdev;
+#endif
+ in->chunkId = chunk;
+
+ 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)
{
- // 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->chunkId);
- in->valid = 0;
- }
- else
- {
- // Use existing - destroy this one.
- yaffs_DeleteChunk(dev,chunk);
- }
+ // Set up as a directory
+ parent->variantType = YAFFS_OBJECT_TYPE_DIRECTORY;
+ INIT_LIST_HEAD(&parent->variant.directoryVariant.children);
}
-
- if(!in->valid)
+ else if(parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
{
- // we need to load this info
-
- in->valid = 1;
- in->variantType = oh->type;
-
- in->st_mode = oh->st_mode;
- in->st_uid = oh->st_uid;
- in->st_gid = oh->st_gid;
- in->st_atime = oh->st_atime;
- in->st_mtime = oh->st_mtime;
- in->st_ctime = oh->st_ctime;
- in->chunkId = chunk;
-
- in->sum = oh->sum;
- 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
- parent->variantType = YAFFS_OBJECT_TYPE_DIRECTORY;
- INIT_LIST_HEAD(&parent->variant.directoryVariant.children);
- }
- else if(parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
- {
- // Hoosterman, another problem....
- // We're trying to use a non-directory as a directory
- // Todo ... handle
- }
-
- yaffs_AddObjectToDirectory(parent,in);
-
- // 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:
- in->variant.fileVariant.fileSize = oh->fileSize;
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- in->variant.hardLinkVariant.equivalentObjectId = oh->equivalentObjectId;
- (yaffs_Object *)(in->hardLinks.next) = hardList;
- hardList = in;
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY: // Do nothing
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK: // Do nothing
- in->variant.symLinkVariant.alias = yaffs_CloneString(oh->alias);
- break;
- }
- T((" %d %d header %d \"%s\" type %d\n",blk,c,tags.objectId,oh->name,in->variantType));
+ // Hoosterman, another problem....
+ // We're trying to use a non-directory as a directory
+ // Todo ... handle
+ T(YAFFS_TRACE_ERROR, (TSTR("yaffs tradgedy: attempting to use non-directory as a directory in scan" TENDSTR)));
+
+ }
+
+ yaffs_AddObjectToDirectory(parent,in);
+ if(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:
+#ifdef CONFIG_YAFFS_USE_HEADER_FILE_SIZE
+ in->variant.fileVariant.fileSize = oh->fileSize;
+#endif
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ in->variant.hardLinkVariant.equivalentObjectId = oh->equivalentObjectId;
+ (yaffs_Object *)(in->hardLinks.next) = 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: // Do nothing
+ in->variant.symLinkVariant.alias = yaffs_CloneString(oh->alias);
+ break;
}
+ //T((" %d %d header %d \"%s\" type %d\n",blk,c,tags.objectId,oh->name,in->variantType));
}
}
- else
- {
- // it's a bad block
- state = YAFFS_BLOCK_STATE_DEAD;
- }
}
if(state == YAFFS_BLOCK_STATE_SCANNING)
state = YAFFS_BLOCK_STATE_FULL;
}
- dev->blockInfo[blk].blockState = state;
+ bi->blockState = state;
// Now let's see if it was dirty
- if( dev->blockInfo[blk].pagesInUse == 0 &&
- dev->blockInfo[blk].blockState == YAFFS_BLOCK_STATE_FULL)
+ if( bi->pagesInUse == 0 &&
+ bi->blockState == YAFFS_BLOCK_STATE_FULL)
{
yaffs_BlockBecameDirty(dev,blk);
}
// Now add it
list_add(&obj->siblings,&directory->variant.directoryVariant.children);
obj->parent = directory;
+
+ if(directory == obj->myDev->unlinkedDir)
+ {
+ obj->unlinked = 1;
+ obj->myDev->nUnlinkedFiles++;
+ obj->renameAllowed = 0;
+ }
}
static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
int sum;
struct list_head *i;
- __u8 buffer[YAFFS_BYTES_PER_CHUNK];
- yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)buffer;
+ char buffer[YAFFS_MAX_NAME_LENGTH+1];
yaffs_Object *l;
// Special case for lost-n-found
if(l->objectId == YAFFS_OBJECTID_LOSTNFOUND)
{
- if(strcmp(name,YAFFS_LOSTNFOUND_NAME) == 0)
+ if(yaffs_strcmp(name,YAFFS_LOSTNFOUND_NAME) == 0)
{
return l;
}
}
- else if(l->sum == sum)
+ else if(yaffs_SumCompare(l->sum, sum))
{
// Do a real check
- yaffs_ReadChunkFromNAND(l->myDev,l->chunkId,buffer,NULL);
- if(strcmp(name,oh->name) == 0)
+ yaffs_GetObjectName(l,buffer,YAFFS_MAX_NAME_LENGTH);
+ if(yaffs_strcmp(name,buffer) == 0)
{
return l;
}
{
strncpy(name,YAFFS_LOSTNFOUND_NAME,buffSize - 1);
}
+ else if(obj->chunkId <= 0)
+ {
+ char locName[20];
+ // make up a name
+ sprintf(locName,"%s%d",YAFFS_LOSTNFOUND_PREFIX,obj->objectId);
+ strncpy(name,locName,buffSize - 1);
+
+ }
+#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+ else if(obj->shortName[0])
+ {
+ strcpy(name,obj->shortName);
+ }
+#endif
else
{
__u8 buffer[YAFFS_BYTES_PER_CHUNK];
if(obj->chunkId >= 0)
{
- yaffs_ReadChunkFromNAND(obj->myDev,obj->chunkId,buffer,NULL);
+ yaffs_ReadChunkFromNAND(obj->myDev,obj->chunkId,buffer,NULL,1);
}
strncpy(name,oh->name,buffSize - 1);
}
int yaffs_GetObjectLinkCount(yaffs_Object *obj)
{
- int count = 1; // the object itself
+ int count = 0;
struct list_head *i;
+ if(!obj->unlinked)
+ {
+ count++; // the object itself
+ }
list_for_each(i,&obj->hardLinks)
{
- count++;
+ count++; // add the hard links;
}
return count;
case YAFFS_OBJECT_TYPE_DIRECTORY: return DT_DIR; break;
case YAFFS_OBJECT_TYPE_SYMLINK: return DT_LNK; break;
case YAFFS_OBJECT_TYPE_HARDLINK: return DT_REG; break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ if(S_ISFIFO(obj->st_mode)) return DT_FIFO;
+ if(S_ISCHR(obj->st_mode)) return DT_CHR;
+ if(S_ISBLK(obj->st_mode)) return DT_BLK;
+ if(S_ISSOCK(obj->st_mode)) return DT_SOCK;
default: return DT_REG; break;
}
}
}
}
+#ifndef CONFIG_YAFFS_WINCE
int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
{
if(valid & ATTR_SIZE) yaffs_ResizeFile(obj,attr->ia_size);
- yaffs_UpdateObjectHeader(obj,NULL);
+ yaffs_UpdateObjectHeader(obj,NULL,1);
return YAFFS_OK;
}
-
+#endif
int yaffs_DumpObject(yaffs_Object *obj)
{
- __u8 buffer[YAFFS_BYTES_PER_CHUNK];
- char name[256];
+// __u8 buffer[YAFFS_BYTES_PER_CHUNK];
+ char name[257];
// yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)buffer;
- memset(buffer,0,YAFFS_BYTES_PER_CHUNK);
+// memset(buffer,0,YAFFS_BYTES_PER_CHUNK);
- if(obj->chunkId >= 0)
- {
- yaffs_ReadChunkFromNAND(obj->myDev,obj->chunkId,buffer,NULL);
- }
+// if(obj->chunkId >= 0)
+// {
+// yaffs_ReadChunkFromNAND(obj->myDev,obj->chunkId,buffer,NULL);
+// }
yaffs_GetObjectName(obj,name,256);
- YPRINTF(("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d chunk %d type %d size %d\n",
+ T(YAFFS_TRACE_ALWAYS,(TSTR("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d chunk %d type %d size %d\n" TENDSTR),
obj->objectId,yaffs_GetObjectInode(obj), name, obj->dirty, obj->valid, obj->serial,
obj->sum, obj->chunkId, yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
int yaffs_GutsInitialise(yaffs_Device *dev)
{
- unsigned nChunks,x;
+ unsigned x;
int bits;
+ int extraBits;
+ int nBlocks;
- dev = dev;
if(!yaffs_CheckStructures())
{
+ T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
+ return YAFFS_FAIL;
+ }
+
+ if(dev->startBlock <= 0 ||
+ (dev->endBlock - dev->startBlock) < 10)
+ {
+ T(YAFFS_TRACE_ALWAYS,(TSTR("startBlock %d or endBlock %d invalid\n" TENDSTR),
+ dev->startBlock, dev->endBlock));
return YAFFS_FAIL;
}
+
+ nBlocks = dev->endBlock - dev->startBlock + 1;
+
// OK now calculate a few things for the device
// Calculate chunkGroupBits.
- // If there are 64k or less chunks then this is 1
- // Else it is log2(nChunks) - 16
- //
- x = nChunks = YAFFS_CHUNKS_PER_BLOCK * dev->nBlocks;
+ // We need to find the next power of 2 > than endBlock
- for(bits = 0, x = nChunks; (x & 1) == 0; bits++)
+ x = YAFFS_CHUNKS_PER_BLOCK * (dev->endBlock+1);
+
+ for(bits = extraBits = 0; x > 1; bits++)
{
+ if(x & 1) extraBits++;
x >>= 1;
}
+
+ if(extraBits > 0) bits++;
- if( x != 1)
- {
- // Not a power of 2
- YPRINTF(("nBlocks should be a power of 2 but is %u\n",
- dev->nBlocks));
- return YAFFS_FAIL;
- }
+ // Level0 Tnodes are 16 bits, 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)
{
dev->chunkGroupBits = 0;
- dev->chunkGroupSize = 1;
}
else
{
dev->chunkGroupBits = bits - 16;
- dev->chunkGroupSize = nChunks/0x10000;
}
+ dev->chunkGroupSize = 1 << dev->chunkGroupBits;
+
// More device initialisation
dev->garbageCollectionRequired = 0;
+ dev->garbageCollections = 0;
dev->currentDirtyChecker = 0;
+ dev->bufferedBlock = -1;
+ dev->doingBufferedBlockRewrite = 0;
+ dev->blockSelectedForGC = -1;
+ dev->nDeletedFiles = 0;
+ dev->nBackgroundDeletions=0;
+ dev->nUnlinkedFiles = 0;
+ dev->eccFixed=0;
+ dev->eccUnfixed=0;
+ dev->tagsEccFixed=0;
+ dev->tagsEccUnfixed=0;
- yaffs_InitialiseBlocks(dev);
+ dev->localBuffer = YMALLOC(YAFFS_BYTES_PER_CHUNK);
+
+ yaffs_InitialiseBlocks(dev,nBlocks);
yaffs_InitialiseTnodes(dev);
yaffs_InitialiseObjects(dev);
+#ifdef CONFIG_YAFFS_SHORT_OP_CACHE
+ {
+ int i;
+ for(i=0; i < YAFFS_N_CACHE_CHUNKS; i++)
+ {
+ dev->srCache[i].object = NULL;
+ dev->srCache[i].lastUse = 0;
+ dev->srCache[i].dirty = 0;
+ }
+ dev->srLastUse = 0;
+ }
+#endif
+
+ dev->cacheHits = 0;
+
+
+ // Initialise the unlinked, root and lost and found directories
+ dev->lostNFoundDir = dev->rootDir = dev->unlinkedDir = NULL;
- // Initialise the root and lost and found directories
- dev->lostNFoundDir = dev->rootDir = NULL;
+ dev->unlinkedDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_UNLINKED, S_IFDIR);
+
dev->rootDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_ROOT,YAFFS_ROOT_MODE | S_IFDIR);
- dev->lostNFoundDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_LOSTNFOUND,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.
yaffs_Scan(dev);
+
+ // Zero out stats
+ dev->nPageReads = 0;
+ dev->nPageWrites = 0;
+ dev->nBlockErasures = 0;
+ dev->nGCCopies = 0;
+ dev->nRetriedWrites = 0;
+ dev->nRetiredBlocks = 0;
return YAFFS_OK;
int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
{
int nFree = dev->nFreeChunks - (YAFFS_CHUNKS_PER_BLOCK * YAFFS_RESERVED_BLOCKS);
+
+ struct list_head *i;
+ yaffs_Object *l;
+
+
+ // To the free chunks add the chunks that are in the deleted unlinked files.
+ list_for_each(i,&dev->unlinkedDir->variant.directoryVariant.children)
+ {
+ l = list_entry(i, yaffs_Object,siblings);
+ if(l->deleted)
+ {
+ nFree++;
+ nFree += l->nDataChunks;
+ }
+ }
+
return (nFree < 0) ? 0 : nFree;
#define yaffs_CheckStruct(structure,syze, name) \
if(sizeof(structure) != syze) \
- { YPRINTF(("%s should be %d but is %d\n",name,syze,sizeof(structure))); \
+ { \
+ T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),name,syze,sizeof(structure))); \
return YAFFS_FAIL; \
}
return YAFFS_OK;
}
+#if 0
void yaffs_GutsTest(yaffs_Device *dev)
{
if(yaffs_CheckStructures() != YAFFS_OK)
{
- YPRINTF(("One or more structures malformed-- aborting\n"));
- }
- else
- {
- YPRINTF(("Structures OK\n"));
+ T(YAFFS_TRACE_ALWAYS,(TSTR("One or more structures malformed-- aborting\n" TENDSTR)));
+ return;
}
yaffs_TnodeTest(dev);
yaffs_ObjectTest(dev);
}
+#endif
+
projects / yaffs / .git / blobdiff