*/
//yaffs_guts.c
-const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.21 2003-02-03 18:33:28 charles Exp $";
+const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.39 2005-01-24 22:26:45 charles Exp $";
#include "yportenv.h"
#include "yaffsinterface.h"
#include "yaffs_guts.h"
-
-
-
#define YAFFS_PASSIVE_GC_CHUNKS 2
+#if 0
+// Use Steven Hill's ECC struff instead
// External functions for ECC on data
void nand_calculate_ecc (const u_char *dat, u_char *ecc_code);
int nand_correct_data (u_char *dat, u_char *read_ecc, u_char *calc_ecc);
-
+#define yaffs_ECCCalculate(data,ecc) nand_calculate_ecc(data,ecc)
+#define yaffs_ECCCorrect(data,read_ecc,calc_ecc) nand_correct_ecc(data,read_ecc,calc_ecc)
+#else
+#include "yaffs_ecc.h"
+#endif
// 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.
int retVal;
yaffs_Spare localSpare;
- __u8 calcEcc[3];
- int eccResult1,eccResult2;
- struct yaffs_NANDSpare nspare;
-
dev->nPageReads++;
{
// Do ECC correction
//Todo handle any errors
- nand_calculate_ecc(data,calcEcc);
- eccResult1 = nand_correct_data (data,spare->ecc1, calcEcc);
- nand_calculate_ecc(&data[256],calcEcc);
- eccResult2 = nand_correct_data (&data[256],spare->ecc2, calcEcc);
+ int eccResult1,eccResult2;
+ __u8 calcEcc[3];
+
+ yaffs_ECCCalculate(data,calcEcc);
+ eccResult1 = yaffs_ECCCorrect (data,spare->ecc1, calcEcc);
+ yaffs_ECCCalculate(&data[256],calcEcc);
+ eccResult2 = yaffs_ECCCorrect(&data[256],spare->ecc2, calcEcc);
if(eccResult1>0)
{
}
else
{
+ // Must allocate enough memory for spare+2*sizeof(int) for ecc results from device.
+ struct yaffs_NANDSpare nspare;
retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare*)&nspare);
memcpy (spare, &nspare, sizeof(yaffs_Spare));
if(data && doErrorCorrection)
T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND));
}
- if(nspare.eccres2 || nspare.eccres2)
+ if(nspare.eccres1 || nspare.eccres2)
{
// Hoosterman, we had a data problem on this page
yaffs_HandleReadDataError(dev,chunkInNAND);
static int init = 0;
static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK];
static __u8 data[YAFFS_BYTES_PER_CHUNK];
- static __u8 spare[16];
-
-
- dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare *)spare);
-
-
+ // Might as well always allocate the larger size for dev->useNANDECC == true;
+ static __u8 spare[sizeof(struct yaffs_NANDSpare)];
+
+ dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare *)spare);
if(!init)
{
void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
{
- nand_calculate_ecc (data , spare->ecc1);
- nand_calculate_ecc (&data[256] , spare->ecc2);
+ yaffs_ECCCalculate(data , spare->ecc1);
+ yaffs_ECCCalculate(&data[256] , spare->ecc2);
}
void yaffs_CalcTagsECC(yaffs_Tags *tags)
static void yaffs_DeinitialiseTnodes(yaffs_Device*dev)
{
// Free the list of allocated tnodes
-
+ yaffs_TnodeList *tmp;
+
while(dev->allocatedTnodeList)
{
+ tmp = dev->allocatedTnodeList->next;
+
YFREE(dev->allocatedTnodeList->tnodes);
- dev->allocatedTnodeList = dev->allocatedTnodeList->next;
+ YFREE(dev->allocatedTnodeList);
+ dev->allocatedTnodeList = tmp;
+
}
dev->freeTnodes = NULL;
if(limit)
{
*limit = *limit-1;
- if(limit <= 0)
+ if(*limit <= 0)
{
hitLimit = 1;
}
{
if(tn->level0[i])
{
+ // Note this does not find the real chunk, only the chunk group.
+ // We make an assumption that a chunk group is niot larger than a block.
theChunk = (tn->level0[i] << in->myDev->chunkGroupBits);
T(YAFFS_TRACE_SCAN,(TSTR("soft delete tch %d cgb %d chunk %d" TENDSTR),
tn->level0[i],in->myDev->chunkGroupBits,theChunk));
yaffs_Device *dev = tn->myDev;
+#ifdef __KERNEL__
+ if(tn->myInode)
+ {
+ // We're still hooked up to a cached inode.
+ // Don't delete now, but mark for later deletion
+ tn->deferedFree = 1;
+ return;
+ }
+#endif
+
yaffs_UnhashObject(tn);
// Link into the free list.
}
+#ifdef __KERNEL__
+
+void yaffs_HandleDeferedFree(yaffs_Object *obj)
+{
+ if(obj->deferedFree)
+ {
+ yaffs_FreeObject(obj);
+ }
+}
+
+#endif
+
static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
{
// Free the list of allocated Objects
+ yaffs_ObjectList *tmp;
+
while( dev->allocatedObjectList)
{
+ tmp = dev->allocatedObjectList->next;
YFREE(dev->allocatedObjectList->objects);
- dev->allocatedObjectList = dev->allocatedObjectList->next;
+ YFREE(dev->allocatedObjectList);
+
+ dev->allocatedObjectList = tmp;
}
dev->freeObjects = NULL;
in = list_entry(i, yaffs_Object,hashLink);
if(in->objectId == number)
{
+#ifdef __KERNEL__
+ // Don't tell the VFS about this if it has been marked for freeing
+ if(in->deferedFree)
+ return NULL;
+#endif
return in;
}
}
theObject->win_ctime[1] = theObject->win_mtime[1] = theObject->win_atime[1];
#else
- theObject->st_atime = theObject->st_mtime = theObject->st_ctime = CURRENT_TIME;
+
+ theObject->st_atime = theObject->st_mtime = theObject->st_ctime = Y_CURRENT_TIME;
+
#endif
switch(type)
{
#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];
+ in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
#else
- in->st_atime = in->st_mtime = in->st_ctime = CURRENT_TIME;
+
+ in->st_atime = in->st_mtime = in->st_ctime = Y_CURRENT_TIME;
in->st_rdev = rdev;
in->st_uid = uid;
in->st_gid = gid;
{
// It's a header
object->chunkId = newChunk;
+ object->serial = tags.serialNumber;
}
else
{
}
else
{
+ memset(buffer,0,YAFFS_BYTES_PER_CHUNK);
return 0;
}
if(markNAND)
{
yaffs_SpareInitialise(&spare);
-
+
+#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
+
spare.pageStatus = 0; // To mark it as deleted.
int lowest;
int i;
yaffs_ChunkCache *cache;
- int chunkWritten;
+ int chunkWritten = 0;
int nBytes;
int nCaches = obj->myDev->nShortOpCaches;
cache->nBytes,1);
cache->dirty = 0;
+ cache->object = NULL;
}
} while(cache && chunkWritten > 0);
if(!dev->srCache[i].object)
{
//T(("Grabbing empty %d\n",i));
+
+ //printf("Grabbing empty %d\n",i);
return &dev->srCache[i];
}
}
+
+ return NULL;
theOne = -1;
usage = 0; // just to stop the compiler grizzling
}
//T(("Grabbing non-empty %d\n",theOne));
+
+ //if(theOne >= 0) printf("Grabbed non-empty cache %d\n",theOne);
+
return theOne >= 0 ? &dev->srCache[theOne] : NULL;
}
else
yaffs_Object *theObj;
int usage;
int i;
+ int pushout;
if(dev->nShortOpCaches > 0)
{
theObj = dev->srCache[0].object;
usage = dev->srCache[0].lastUse;
+ cache = &dev->srCache[0];
+ pushout = 0;
for(i = 1; i < dev->nShortOpCaches; i++)
{
{
usage = dev->srCache[i].lastUse;
theObj = dev->srCache[i].object;
+ cache = &dev->srCache[i];
+ pushout = i;
}
}
- yaffs_FlushFilesChunkCache(theObj);
+ if(!cache || cache->dirty)
+ {
+
+ //printf("Dirty ");
+ yaffs_FlushFilesChunkCache(theObj);
- // Try again
- cache = yaffs_GrabChunkCacheWorker(dev);
+ // Try again
+ cache = yaffs_GrabChunkCacheWorker(dev);
+ }
+ else
+ {
+ //printf(" pushout %d\n",pushout);
+ }
+
}
-
+
return cache;
}
else
int nToCopy;
int n = nBytes;
int nDone = 0;
+ yaffs_ChunkCache *cache;
yaffs_Device *dev;
nToCopy = YAFFS_BYTES_PER_CHUNK - start;
}
- if(nToCopy != YAFFS_BYTES_PER_CHUNK)
+ cache = yaffs_FindChunkCache(in,chunk);
+
+ // If the chunk is already in the cache or it is less than a whole chunk
+ // then use the cache (if there is caching)
+ // else bypass the cache.
+ if( cache || nToCopy != YAFFS_BYTES_PER_CHUNK)
{
- // 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 it up.
- cache = yaffs_FindChunkCache(in,chunk);
+
if(!cache)
{
cache = yaffs_GrabChunkCache(in->myDev);
// using yaffs_DeleteChunk
chunkId = yaffs_FindAndDeleteChunkInFile(in,i,NULL);
- if(chunkId <= 0 || chunkId >= (dev->endBlock * 32))
+ if(chunkId < (dev->startBlock * 32) || chunkId >= ((dev->endBlock+1) * 32))
{
//T(("Found daft chunkId %d for %d\n",chunkId,i));
}
int lastChunk = 1+ newSize/YAFFS_BYTES_PER_CHUNK;
// Got to read and rewrite the last chunk with its new size.
+ // NB Got to zero pad to nuke old data
yaffs_ReadChunkDataFromObject(in,lastChunk,dev->localBuffer);
-
+ memset(dev->localBuffer + sizeOfPartialChunk,0, YAFFS_BYTES_PER_CHUNK - sizeOfPartialChunk);
+
yaffs_WriteChunkDataToObject(in,lastChunk,dev->localBuffer,sizeOfPartialChunk,1);
}
#ifdef CONFIG_YAFFS_WINCE
yfsd_WinFileTimeNow(in->win_mtime);
#else
- in->st_mtime = CURRENT_TIME;
+ in->st_mtime = Y_CURRENT_TIME;
#endif
}
yaffs_RemoveObjectFromDirectory(in);
yaffs_DeleteChunk(in->myDev,in->chunkId,1);
+ in->chunkId = -1;
+#if 0
#ifdef __KERNEL__
if(in->myInode)
{
in->myInode->u.generic_ip = NULL;
- in->myInode = 0;
+ in->myInode = NULL;
}
+#endif
#endif
yaffs_FreeObject(in);
return YAFFS_OK;
#ifdef __KERNEL__
if(!in->myInode)
{
+ // Might be open at present,
+ // Caught by delete_inode in yaffs_fs.c
immediateDeletion = 1;
}
{
// Hoosterman, another problem....
// We're trying to use a non-directory as a directory
- // Todo ... handle
- T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: attempting to use non-directory as a directory in scan" TENDSTR)));
+
+ T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." TENDSTR)));
+ parent = dev->lostNFoundDir;
}
if(valid & ATTR_UID) obj->st_uid = attr->ia_uid;
if(valid & ATTR_GID) obj->st_gid = attr->ia_gid;
- if(valid & ATTR_ATIME) obj->st_atime = attr->ia_atime;
- if(valid & ATTR_CTIME) obj->st_ctime = attr->ia_ctime;
- if(valid & ATTR_MTIME) obj->st_mtime = attr->ia_mtime;
+ if(valid & ATTR_ATIME) obj->st_atime = Y_TIME_CONVERT(attr->ia_atime);
+ if(valid & ATTR_CTIME) obj->st_ctime = Y_TIME_CONVERT(attr->ia_ctime);
+ if(valid & ATTR_MTIME) obj->st_mtime = Y_TIME_CONVERT(attr->ia_mtime);
+
if(valid & ATTR_SIZE) yaffs_ResizeFile(obj,attr->ia_size);
return YAFFS_OK;
}
+
int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
{
unsigned int valid = 0;
attr->ia_uid = obj->st_uid; valid |= ATTR_UID;
attr->ia_gid = obj->st_gid; valid |= ATTR_GID;
- attr->ia_atime = obj->st_atime; valid |= ATTR_ATIME;
- attr->ia_ctime = obj->st_ctime; valid |= ATTR_CTIME;
- attr->ia_mtime = obj->st_mtime; valid |= ATTR_MTIME;
+ Y_TIME_CONVERT(attr->ia_atime) = obj->st_atime; valid |= ATTR_ATIME;
+ Y_TIME_CONVERT(attr->ia_ctime) = obj->st_ctime; valid |= ATTR_CTIME;
+ Y_TIME_CONVERT(attr->ia_mtime) = obj->st_mtime; valid |= ATTR_MTIME;
+
attr->ia_size = yaffs_GetFileSize(obj); valid |= ATTR_SIZE;
attr->ia_valid = valid;
int extraBits;
int nBlocks;
- if( dev->nBytesPerChunk != YAFFS_BYTES_PER_CHUNK ||
-
+ if( dev->nBytesPerChunk != YAFFS_BYTES_PER_CHUNK ||
dev->nChunksPerBlock < 2 ||
dev->nReservedBlocks < 2 ||
dev->startBlock <= 0 ||
{
dev->chunkGroupBits = bits - 16;
}
+
dev->chunkGroupSize = 1 << dev->chunkGroupBits;
+
+ if(dev->nChunksPerBlock < dev->chunkGroupSize)
+ {
+ // We have a problem because the soft delete won't work if
+ // the chunk group size > chunks per block.
+ // This can be remedied by using larger "virtual blocks".
+
+ return YAFFS_FAIL;
+ }
+
yaffs_DeinitialiseBlocks(dev);
yaffs_DeinitialiseTnodes(dev);
yaffs_DeinitialiseObjects(dev);
+ if(dev->nShortOpCaches > 0)
+ YFREE(dev->srCache);
YFREE(dev->localBuffer);
+ dev->isMounted = 0;
}
}
}
- printf("___________ nFreeChunks is %d nFree is %d\n",dev->nFreeChunks,nFree);
+ // printf("___________ nFreeChunks is %d nFree is %d\n",dev->nFreeChunks,nFree);
if(nFree < 0) nFree = 0;
int nFree;
int pending;
int b;
+ int nDirtyCacheChunks=0;
yaffs_BlockInfo *blk;
nFree += pending;
+ // Now count the number of dirty chunks in the cache and subtract those
+
+ {
+ int i;
+ for(i = 0; i < dev->nShortOpCaches; i++)
+ {
+ if(dev->srCache[i].dirty) nDirtyCacheChunks++;
+ }
+ }
+
+ nFree -= nDirtyCacheChunks;
+
+ nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
+
if(nFree < 0) nFree = 0;
return nFree;
+
+
+
projects / yaffs / .git / blobdiff