diff options
Diffstat (limited to 'fs/yaffs2/yaffs_guts.c')
| -rw-r--r-- | fs/yaffs2/yaffs_guts.c | 9119 |
1 files changed, 3411 insertions, 5708 deletions
diff --git a/fs/yaffs2/yaffs_guts.c b/fs/yaffs2/yaffs_guts.c index 7390b40e0..00d1c5a91 100644 --- a/fs/yaffs2/yaffs_guts.c +++ b/fs/yaffs2/yaffs_guts.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -11,259 +11,176 @@ * published by the Free Software Foundation. */ -/* XXX U-BOOT XXX */ -#include <common.h> - -const char *yaffs_guts_c_version = - "$Id: yaffs_guts.c,v 1.52 2007/10/16 00:45:05 charles Exp $"; - #include "yportenv.h" -#include "linux/stat.h" +#include "yaffs_trace.h" -#include "yaffsinterface.h" -#include "yaffsfs.h" #include "yaffs_guts.h" -#include "yaffs_tagsvalidity.h" - +#include "yaffs_getblockinfo.h" #include "yaffs_tagscompat.h" -#ifndef CONFIG_YAFFS_USE_OWN_SORT -#include "yaffs_qsort.h" -#endif #include "yaffs_nand.h" - -#include "yaffs_checkptrw.h" - +#include "yaffs_yaffs1.h" +#include "yaffs_yaffs2.h" +#include "yaffs_bitmap.h" +#include "yaffs_verify.h" #include "yaffs_nand.h" #include "yaffs_packedtags2.h" +#include "yaffs_nameval.h" +#include "yaffs_allocator.h" +#include "yaffs_attribs.h" +#include "yaffs_summary.h" -#include "malloc.h" - -#ifdef CONFIG_YAFFS_WINCE -void yfsd_LockYAFFS(BOOL fsLockOnly); -void yfsd_UnlockYAFFS(BOOL fsLockOnly); -#endif - -#define YAFFS_PASSIVE_GC_CHUNKS 2 +/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */ +#define YAFFS_GC_GOOD_ENOUGH 2 +#define YAFFS_GC_PASSIVE_THRESHOLD 4 #include "yaffs_ecc.h" +/* Forward declarations */ -/* Robustification (if it ever comes about...) */ -static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND); -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk); -static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * tags); -static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, - const yaffs_ExtendedTags * tags); - -/* Other local prototypes */ -static int yaffs_UnlinkObject( yaffs_Object *obj); -static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj); - -static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList); - -static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device * dev, - const __u8 * buffer, - yaffs_ExtendedTags * tags, - int useReserve); -static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode, - int chunkInNAND, int inScan); - -static yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number, - yaffs_ObjectType type); -static void yaffs_AddObjectToDirectory(yaffs_Object * directory, - yaffs_Object * obj); -static int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, - int force, int isShrink, int shadows); -static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj); -static int yaffs_CheckStructures(void); -static int yaffs_DoGenericObjectDeletion(yaffs_Object * in); - -static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blockNo); - -static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo); -static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer, - int lineNo); - -static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, - int chunkInNAND); - -static int yaffs_UnlinkWorker(yaffs_Object * obj); -static void yaffs_DestroyObject(yaffs_Object * obj); - -static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId, - int chunkInObject); +static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, + const u8 *buffer, int n_bytes, int use_reserve); -loff_t yaffs_GetFileSize(yaffs_Object * obj); -static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr); -static void yaffs_VerifyFreeChunks(yaffs_Device * dev); - -static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in); - -#ifdef YAFFS_PARANOID -static int yaffs_CheckFileSanity(yaffs_Object * in); -#else -#define yaffs_CheckFileSanity(in) -#endif - -static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in); -static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId); +/* Function to calculate chunk and offset */ -static void yaffs_InvalidateCheckpoint(yaffs_Device *dev); +void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr, + int *chunk_out, u32 *offset_out) +{ + int chunk; + u32 offset; -static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode, - yaffs_ExtendedTags * tags); + chunk = (u32) (addr >> dev->chunk_shift); -static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos); -static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev, - yaffs_FileStructure * fStruct, - __u32 chunkId); + if (dev->chunk_div == 1) { + /* easy power of 2 case */ + offset = (u32) (addr & dev->chunk_mask); + } else { + /* Non power-of-2 case */ + loff_t chunk_base; -/* Function to calculate chunk and offset */ + chunk /= dev->chunk_div; -static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, __u32 *chunk, __u32 *offset) -{ - if(dev->chunkShift){ - /* Easy-peasy power of 2 case */ - *chunk = (__u32)(addr >> dev->chunkShift); - *offset = (__u32)(addr & dev->chunkMask); + chunk_base = ((loff_t) chunk) * dev->data_bytes_per_chunk; + offset = (u32) (addr - chunk_base); } - else if(dev->crumbsPerChunk) - { - /* Case where we're using "crumbs" */ - *offset = (__u32)(addr & dev->crumbMask); - addr >>= dev->crumbShift; - *chunk = ((__u32)addr)/dev->crumbsPerChunk; - *offset += ((addr - (*chunk * dev->crumbsPerChunk)) << dev->crumbShift); - } - else - YBUG(); + + *chunk_out = chunk; + *offset_out = offset; } -/* Function to return the number of shifts for a power of 2 greater than or equal - * to the given number +/* Function to return the number of shifts for a power of 2 greater than or + * equal to the given number * Note we don't try to cater for all possible numbers and this does not have to * be hellishly efficient. */ -static __u32 ShiftsGE(__u32 x) +static inline u32 calc_shifts_ceiling(u32 x) { - int extraBits; - int nShifts; + int extra_bits; + int shifts; - nShifts = extraBits = 0; + shifts = extra_bits = 0; - while(x>1){ - if(x & 1) extraBits++; - x>>=1; - nShifts++; + while (x > 1) { + if (x & 1) + extra_bits++; + x >>= 1; + shifts++; } - if(extraBits) - nShifts++; + if (extra_bits) + shifts++; - return nShifts; + return shifts; } /* Function to return the number of shifts to get a 1 in bit 0 */ -static __u32 ShiftDiv(__u32 x) +static inline u32 calc_shifts(u32 x) { - int nShifts; + u32 shifts; - nShifts = 0; + shifts = 0; - if(!x) return 0; + if (!x) + return 0; - while( !(x&1)){ - x>>=1; - nShifts++; + while (!(x & 1)) { + x >>= 1; + shifts++; } - return nShifts; + return shifts; } - - /* * Temporary buffer manipulations. */ -static int yaffs_InitialiseTempBuffers(yaffs_Device *dev) +static int yaffs_init_tmp_buffers(struct yaffs_dev *dev) { int i; - __u8 *buf = (__u8 *)1; + u8 *buf = (u8 *) 1; - memset(dev->tempBuffer,0,sizeof(dev->tempBuffer)); + memset(dev->temp_buffer, 0, sizeof(dev->temp_buffer)); for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) { - dev->tempBuffer[i].line = 0; /* not in use */ - dev->tempBuffer[i].buffer = buf = - YMALLOC_DMA(dev->nDataBytesPerChunk); + dev->temp_buffer[i].in_use = 0; + buf = kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); + dev->temp_buffer[i].buffer = buf; } return buf ? YAFFS_OK : YAFFS_FAIL; - } -static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo) +u8 *yaffs_get_temp_buffer(struct yaffs_dev * dev) { - int i, j; - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->tempBuffer[i].line == 0) { - dev->tempBuffer[i].line = lineNo; - if ((i + 1) > dev->maxTemp) { - dev->maxTemp = i + 1; - for (j = 0; j <= i; j++) - dev->tempBuffer[j].maxLine = - dev->tempBuffer[j].line; - } + int i; - return dev->tempBuffer[i].buffer; - } - } + dev->temp_in_use++; + if (dev->temp_in_use > dev->max_temp) + dev->max_temp = dev->temp_in_use; - T(YAFFS_TRACE_BUFFERS, - (TSTR("Out of temp buffers at line %d, other held by lines:"), - lineNo)); for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line)); + if (dev->temp_buffer[i].in_use == 0) { + dev->temp_buffer[i].in_use = 1; + return dev->temp_buffer[i].buffer; + } } - T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR))); + yaffs_trace(YAFFS_TRACE_BUFFERS, "Out of temp buffers"); /* * If we got here then we have to allocate an unmanaged one * This is not good. */ - dev->unmanagedTempAllocations++; - return YMALLOC(dev->nDataBytesPerChunk); + dev->unmanaged_buffer_allocs++; + return kmalloc(dev->data_bytes_per_chunk, GFP_NOFS); } -static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer, - int lineNo) +void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer) { int i; + + dev->temp_in_use--; + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->tempBuffer[i].buffer == buffer) { - dev->tempBuffer[i].line = 0; + if (dev->temp_buffer[i].buffer == buffer) { + dev->temp_buffer[i].in_use = 0; return; } } if (buffer) { /* assume it is an unmanaged one. */ - T(YAFFS_TRACE_BUFFERS, - (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR), - lineNo)); - YFREE(buffer); - dev->unmanagedTempDeallocations++; + yaffs_trace(YAFFS_TRACE_BUFFERS, + "Releasing unmanaged temp buffer"); + kfree(buffer); + dev->unmanaged_buffer_deallocs++; } } @@ -271,621 +188,339 @@ static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer, /* * Determine if we have a managed buffer. */ -int yaffs_IsManagedTempBuffer(yaffs_Device * dev, const __u8 * buffer) +int yaffs_is_managed_tmp_buffer(struct yaffs_dev *dev, const u8 *buffer) { int i; + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->tempBuffer[i].buffer == buffer) + if (dev->temp_buffer[i].buffer == buffer) return 1; - } - for (i = 0; i < dev->nShortOpCaches; i++) { - if( dev->srCache[i].data == buffer ) - return 1; - - } + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].data == buffer) + return 1; + } - if (buffer == dev->checkpointBuffer) - return 1; + if (buffer == dev->checkpt_buffer) + return 1; - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR))); - return 0; + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: unmaged buffer detected."); + return 0; } - - /* - * Chunk bitmap manipulations + * Functions for robustisizing TODO + * */ -static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device * dev, int blk) +static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk, + const u8 *data, + const struct yaffs_ext_tags *tags) { - if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR), - blk)); - YBUG(); - } - return dev->chunkBits + - (dev->chunkBitmapStride * (blk - dev->internalStartBlock)); + dev = dev; + nand_chunk = nand_chunk; + data = data; + tags = tags; } -static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk) +static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk, + const struct yaffs_ext_tags *tags) { - if(blk < dev->internalStartBlock || blk > dev->internalEndBlock || - chunk < 0 || chunk >= dev->nChunksPerBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),blk,chunk)); - YBUG(); - } + dev = dev; + nand_chunk = nand_chunk; + tags = tags; } -static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device * dev, int blk) +void yaffs_handle_chunk_error(struct yaffs_dev *dev, + struct yaffs_block_info *bi) { - __u8 *blkBits = yaffs_BlockBits(dev, blk); + if (!bi->gc_prioritise) { + bi->gc_prioritise = 1; + dev->has_pending_prioritised_gc = 1; + bi->chunk_error_strikes++; - memset(blkBits, 0, dev->chunkBitmapStride); -} + if (bi->chunk_error_strikes > 3) { + bi->needs_retiring = 1; /* Too many stikes, so retire */ + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Block struck out"); -static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device * dev, int blk, int chunk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - - yaffs_VerifyChunkBitId(dev,blk,chunk); - - blkBits[chunk / 8] &= ~(1 << (chunk & 7)); -} - -static Y_INLINE void yaffs_SetChunkBit(yaffs_Device * dev, int blk, int chunk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - - yaffs_VerifyChunkBitId(dev,blk,chunk); - - blkBits[chunk / 8] |= (1 << (chunk & 7)); + } + } } -static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device * dev, int blk, int chunk) +static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk, + int erased_ok) { - __u8 *blkBits = yaffs_BlockBits(dev, blk); - yaffs_VerifyChunkBitId(dev,blk,chunk); + int flash_block = nand_chunk / dev->param.chunks_per_block; + struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); - return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; -} + yaffs_handle_chunk_error(dev, bi); -static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device * dev, int blk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - int i; - for (i = 0; i < dev->chunkBitmapStride; i++) { - if (*blkBits) - return 1; - blkBits++; + if (erased_ok) { + /* Was an actual write failure, + * so mark the block for retirement.*/ + bi->needs_retiring = 1; + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>> Block %d needs retiring", flash_block); } - return 0; -} -static int yaffs_CountChunkBits(yaffs_Device * dev, int blk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - int i; - int n = 0; - for (i = 0; i < dev->chunkBitmapStride; i++) { - __u8 x = *blkBits; - while(x){ - if(x & 1) - n++; - x >>=1; - } - - blkBits++; - } - return n; + /* Delete the chunk */ + yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); + yaffs_skip_rest_of_block(dev); } /* * Verification code */ -static Y_INLINE int yaffs_SkipVerification(yaffs_Device *dev) -{ - return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL)); -} - -static Y_INLINE int yaffs_SkipFullVerification(yaffs_Device *dev) -{ - return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL)); -} +/* + * Simple hash function. Needs to have a reasonable spread + */ -static Y_INLINE int yaffs_SkipNANDVerification(yaffs_Device *dev) +static inline int yaffs_hash_fn(int n) { - return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND)); + if (n < 0) + n = -n; + return n % YAFFS_NOBJECT_BUCKETS; } -static const char * blockStateName[] = { -"Unknown", -"Needs scanning", -"Scanning", -"Empty", -"Allocating", -"Full", -"Dirty", -"Checkpoint", -"Collecting", -"Dead" -}; +/* + * Access functions to useful fake objects. + * Note that root might have a presence in NAND if permissions are set. + */ -static void yaffs_VerifyBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n) +struct yaffs_obj *yaffs_root(struct yaffs_dev *dev) { - int actuallyUsed; - int inUse; - - if(yaffs_SkipVerification(dev)) - return; - - /* Report illegal runtime states */ - if(bi->blockState <0 || bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES) - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has undefined state %d"TENDSTR),n,bi->blockState)); - - switch(bi->blockState){ - case YAFFS_BLOCK_STATE_UNKNOWN: - case YAFFS_BLOCK_STATE_SCANNING: - case YAFFS_BLOCK_STATE_NEEDS_SCANNING: - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has bad run-state %s"TENDSTR), - n,blockStateName[bi->blockState])); - } - - /* Check pages in use and soft deletions are legal */ - - actuallyUsed = bi->pagesInUse - bi->softDeletions; - - if(bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock || - bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock || - actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock) - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR), - n,bi->pagesInUse,bi->softDeletions)); - - - /* Check chunk bitmap legal */ - inUse = yaffs_CountChunkBits(dev,n); - if(inUse != bi->pagesInUse) - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR), - n,bi->pagesInUse,inUse)); - - /* Check that the sequence number is valid. - * Ten million is legal, but is very unlikely - */ - if(dev->isYaffs2 && - (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) && - (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000 )) - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has suspect sequence number of %d"TENDSTR), - n,bi->sequenceNumber)); - + return dev->root_dir; } -static void yaffs_VerifyCollectedBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n) +struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev) { - yaffs_VerifyBlock(dev,bi,n); + return dev->lost_n_found; +} - /* After collection the block should be in the erased state */ - /* TODO: This will need to change if we do partial gc */ +/* + * Erased NAND checking functions + */ - if(bi->blockState != YAFFS_BLOCK_STATE_EMPTY){ - T(YAFFS_TRACE_ERROR,(TSTR("Block %d is in state %d after gc, should be erased"TENDSTR), - n,bi->blockState)); +int yaffs_check_ff(u8 *buffer, int n_bytes) +{ + /* Horrible, slow implementation */ + while (n_bytes--) { + if (*buffer != 0xff) + return 0; + buffer++; } + return 1; } -static void yaffs_VerifyBlocks(yaffs_Device *dev) +static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk) { - int i; - int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES]; - int nIllegalBlockStates = 0; - - - if(yaffs_SkipVerification(dev)) - return; - - memset(nBlocksPerState,0,sizeof(nBlocksPerState)); - + int retval = YAFFS_OK; + u8 *data = yaffs_get_temp_buffer(dev); + struct yaffs_ext_tags tags; + int result; - for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++){ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i); - yaffs_VerifyBlock(dev,bi,i); + result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags); - if(bi->blockState >=0 && bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES) - nBlocksPerState[bi->blockState]++; - else - nIllegalBlockStates++; + if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR) + retval = YAFFS_FAIL; + if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) || + tags.chunk_used) { + yaffs_trace(YAFFS_TRACE_NANDACCESS, + "Chunk %d not erased", nand_chunk); + retval = YAFFS_FAIL; } - T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR))); - T(YAFFS_TRACE_VERIFY,(TSTR("Block summary"TENDSTR))); - - T(YAFFS_TRACE_VERIFY,(TSTR("%d blocks have illegal states"TENDSTR),nIllegalBlockStates)); - if(nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1) - T(YAFFS_TRACE_VERIFY,(TSTR("Too many allocating blocks"TENDSTR))); - - for(i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++) - T(YAFFS_TRACE_VERIFY, - (TSTR("%s %d blocks"TENDSTR), - blockStateName[i],nBlocksPerState[i])); - - if(dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]) - T(YAFFS_TRACE_VERIFY, - (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR), - dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])); + yaffs_release_temp_buffer(dev, data); - if(dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]) - T(YAFFS_TRACE_VERIFY, - (TSTR("Erased block count wrong dev %d count %d"TENDSTR), - dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])); - - if(nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1) - T(YAFFS_TRACE_VERIFY, - (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR), - nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING])); - - T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR))); + return retval; } -/* - * Verify the object header. oh must be valid, but obj and tags may be NULL in which - * case those tests will not be performed. - */ -static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck) +static int yaffs_verify_chunk_written(struct yaffs_dev *dev, + int nand_chunk, + const u8 *data, + struct yaffs_ext_tags *tags) { - if(yaffs_SkipVerification(obj->myDev)) - return; - - if(!(tags && obj && oh)){ - T(YAFFS_TRACE_VERIFY, - (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR), - (__u32)tags,(__u32)obj,(__u32)oh)); - return; - } - - if(oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN || - oh->type > YAFFS_OBJECT_TYPE_MAX) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR), - tags->objectId, oh->type)); - - if(tags->objectId != obj->objectId) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header mismatch objectId %d"TENDSTR), - tags->objectId, obj->objectId)); + int retval = YAFFS_OK; + struct yaffs_ext_tags temp_tags; + u8 *buffer = yaffs_get_temp_buffer(dev); + int result; + result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, buffer, &temp_tags); + if (memcmp(buffer, data, dev->data_bytes_per_chunk) || + temp_tags.obj_id != tags->obj_id || + temp_tags.chunk_id != tags->chunk_id || + temp_tags.n_bytes != tags->n_bytes) + retval = YAFFS_FAIL; - /* - * Check that the object's parent ids match if parentCheck requested. - * - * Tests do not apply to the root object. - */ + yaffs_release_temp_buffer(dev, buffer); - if(parentCheck && tags->objectId > 1 && !obj->parent) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR), - tags->objectId, oh->parentObjectId)); + return retval; +} - if(parentCheck && obj->parent && - oh->parentObjectId != obj->parent->objectId && - (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED || - obj->parent->objectId != YAFFS_OBJECTID_DELETED)) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR), - tags->objectId, oh->parentObjectId, obj->parent->objectId)); +int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks) +{ + int reserved_chunks; + int reserved_blocks = dev->param.n_reserved_blocks; + int checkpt_blocks; + checkpt_blocks = yaffs_calc_checkpt_blocks_required(dev); - if(tags->objectId > 1 && oh->name[0] == 0) /* Null name */ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header name is NULL"TENDSTR), - obj->objectId)); + reserved_chunks = + (reserved_blocks + checkpt_blocks) * dev->param.chunks_per_block; - if(tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header name is 0xFF"TENDSTR), - obj->objectId)); + return (dev->n_free_chunks > (reserved_chunks + n_chunks)); } -static void yaffs_VerifyFile(yaffs_Object *obj) +static int yaffs_find_alloc_block(struct yaffs_dev *dev) { - int requiredTallness; - int actualTallness; - __u32 lastChunk; - __u32 x; - __u32 i; - yaffs_Device *dev; - yaffs_ExtendedTags tags; - yaffs_Tnode *tn; - __u32 objectId; - - if(obj && yaffs_SkipVerification(obj->myDev)) - return; + int i; + struct yaffs_block_info *bi; - dev = obj->myDev; - objectId = obj->objectId; + if (dev->n_erased_blocks < 1) { + /* Hoosterman we've got a problem. + * Can't get space to gc + */ + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: no more erased blocks"); - /* Check file size is consistent with tnode depth */ - lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1; - x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; - while (x> 0) { - x >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; + return -1; } - actualTallness = obj->variant.fileVariant.topLevel; - - if(requiredTallness > actualTallness ) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR), - obj->objectId,actualTallness, requiredTallness)); - - - /* Check that the chunks in the tnode tree are all correct. - * We do this by scanning through the tnode tree and - * checking the tags for every chunk match. - */ + /* Find an empty block. */ - if(yaffs_SkipNANDVerification(dev)) - return; + for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { + dev->alloc_block_finder++; + if (dev->alloc_block_finder < dev->internal_start_block + || dev->alloc_block_finder > dev->internal_end_block) { + dev->alloc_block_finder = dev->internal_start_block; + } - for(i = 1; i <= lastChunk; i++){ - tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant,i); + bi = yaffs_get_block_info(dev, dev->alloc_block_finder); - if (tn) { - __u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i); - if(theChunk > 0){ - /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */ - yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags); - if(tags.objectId != objectId || tags.chunkId != i){ - T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR), - objectId, i, theChunk, - tags.objectId, tags.chunkId)); - } - } + if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { + bi->block_state = YAFFS_BLOCK_STATE_ALLOCATING; + dev->seq_number++; + bi->seq_number = dev->seq_number; + dev->n_erased_blocks--; + yaffs_trace(YAFFS_TRACE_ALLOCATE, + "Allocated block %d, seq %d, %d left" , + dev->alloc_block_finder, dev->seq_number, + dev->n_erased_blocks); + return dev->alloc_block_finder; } - } -} - -static void yaffs_VerifyDirectory(yaffs_Object *obj) -{ - if(obj && yaffs_SkipVerification(obj->myDev)) - return; - -} - -static void yaffs_VerifyHardLink(yaffs_Object *obj) -{ - if(obj && yaffs_SkipVerification(obj->myDev)) - return; - - /* Verify sane equivalent object */ -} + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs tragedy: no more erased blocks, but there should have been %d", + dev->n_erased_blocks); -static void yaffs_VerifySymlink(yaffs_Object *obj) -{ - if(obj && yaffs_SkipVerification(obj->myDev)) - return; - - /* Verify symlink string */ -} - -static void yaffs_VerifySpecial(yaffs_Object *obj) -{ - if(obj && yaffs_SkipVerification(obj->myDev)) - return; + return -1; } -static void yaffs_VerifyObject(yaffs_Object *obj) +static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver, + struct yaffs_block_info **block_ptr) { - yaffs_Device *dev; - - __u32 chunkMin; - __u32 chunkMax; + int ret_val; + struct yaffs_block_info *bi; - __u32 chunkIdOk; - __u32 chunkIsLive; - - if(!obj) - return; - - dev = obj->myDev; - - if(yaffs_SkipVerification(dev)) - return; - - /* Check sane object header chunk */ - - chunkMin = dev->internalStartBlock * dev->nChunksPerBlock; - chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1; + if (dev->alloc_block < 0) { + /* Get next block to allocate off */ + dev->alloc_block = yaffs_find_alloc_block(dev); + dev->alloc_page = 0; + } - chunkIdOk = (obj->chunkId >= chunkMin && obj->chunkId <= chunkMax); - chunkIsLive = chunkIdOk && - yaffs_CheckChunkBit(dev, - obj->chunkId / dev->nChunksPerBlock, - obj->chunkId % dev->nChunksPerBlock); - if(!obj->fake && - (!chunkIdOk || !chunkIsLive)) { - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d has chunkId %d %s %s"TENDSTR), - obj->objectId,obj->chunkId, - chunkIdOk ? "" : ",out of range", - chunkIsLive || !chunkIdOk ? "" : ",marked as deleted")); + if (!use_reserver && !yaffs_check_alloc_available(dev, 1)) { + /* No space unless we're allowed to use the reserve. */ + return -1; } - if(chunkIdOk && chunkIsLive &&!yaffs_SkipNANDVerification(dev)) { - yaffs_ExtendedTags tags; - yaffs_ObjectHeader *oh; - __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__); + if (dev->n_erased_blocks < dev->param.n_reserved_blocks + && dev->alloc_page == 0) + yaffs_trace(YAFFS_TRACE_ALLOCATE, "Allocating reserve"); - oh = (yaffs_ObjectHeader *)buffer; + /* Next page please.... */ + if (dev->alloc_block >= 0) { + bi = yaffs_get_block_info(dev, dev->alloc_block); - yaffs_ReadChunkWithTagsFromNAND(dev, obj->chunkId,buffer, &tags); + ret_val = (dev->alloc_block * dev->param.chunks_per_block) + + dev->alloc_page; + bi->pages_in_use++; + yaffs_set_chunk_bit(dev, dev->alloc_block, dev->alloc_page); - yaffs_VerifyObjectHeader(obj,oh,&tags,1); + dev->alloc_page++; - yaffs_ReleaseTempBuffer(dev,buffer,__LINE__); - } + dev->n_free_chunks--; - /* Verify it has a parent */ - if(obj && !obj->fake && - (!obj->parent || obj->parent->myDev != dev)){ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR), - obj->objectId,obj->parent)); - } + /* If the block is full set the state to full */ + if (dev->alloc_page >= dev->param.chunks_per_block) { + bi->block_state = YAFFS_BLOCK_STATE_FULL; + dev->alloc_block = -1; + } - /* Verify parent is a directory */ - if(obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY){ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR), - obj->objectId,obj->parent->variantType)); - } + if (block_ptr) + *block_ptr = bi; - switch(obj->variantType){ - case YAFFS_OBJECT_TYPE_FILE: - yaffs_VerifyFile(obj); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - yaffs_VerifySymlink(obj); - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - yaffs_VerifyDirectory(obj); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - yaffs_VerifyHardLink(obj); - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - yaffs_VerifySpecial(obj); - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - default: - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d has illegaltype %d"TENDSTR), - obj->objectId,obj->variantType)); - break; + return ret_val; } + yaffs_trace(YAFFS_TRACE_ERROR, + "!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!"); + return -1; } -static void yaffs_VerifyObjects(yaffs_Device *dev) +static int yaffs_get_erased_chunks(struct yaffs_dev *dev) { - yaffs_Object *obj; - int i; - struct list_head *lh; - - if(yaffs_SkipVerification(dev)) - return; - - /* Iterate through the objects in each hash entry */ - - for(i = 0; i < YAFFS_NOBJECT_BUCKETS; i++){ - list_for_each(lh, &dev->objectBucket[i].list) { - if (lh) { - obj = list_entry(lh, yaffs_Object, hashLink); - yaffs_VerifyObject(obj); - } - } - } - -} - - -/* - * Simple hash function. Needs to have a reasonable spread - */ + int n; -static Y_INLINE int yaffs_HashFunction(int n) -{ -/* XXX U-BOOT XXX */ - /*n = abs(n); */ - if (n < 0) - n = -n; - return (n % YAFFS_NOBJECT_BUCKETS); -} + n = dev->n_erased_blocks * dev->param.chunks_per_block; -/* - * Access functions to useful fake objects - */ + if (dev->alloc_block > 0) + n += (dev->param.chunks_per_block - dev->alloc_page); -yaffs_Object *yaffs_Root(yaffs_Device * dev) -{ - return dev->rootDir; -} + return n; -yaffs_Object *yaffs_LostNFound(yaffs_Device * dev) -{ - return dev->lostNFoundDir; } - /* - * Erased NAND checking functions + * yaffs_skip_rest_of_block() skips over the rest of the allocation block + * if we don't want to write to it. */ - -int yaffs_CheckFF(__u8 * buffer, int nBytes) -{ - /* Horrible, slow implementation */ - while (nBytes--) { - if (*buffer != 0xFF) - return 0; - buffer++; - } - return 1; -} - -static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, - int chunkInNAND) +void yaffs_skip_rest_of_block(struct yaffs_dev *dev) { + struct yaffs_block_info *bi; - int retval = YAFFS_OK; - __u8 *data = yaffs_GetTempBuffer(dev, __LINE__); - yaffs_ExtendedTags tags; - - yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags); - - if(tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR) - retval = YAFFS_FAIL; - - - if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) { - T(YAFFS_TRACE_NANDACCESS, - (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND)); - retval = YAFFS_FAIL; + if (dev->alloc_block > 0) { + bi = yaffs_get_block_info(dev, dev->alloc_block); + if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) { + bi->block_state = YAFFS_BLOCK_STATE_FULL; + dev->alloc_block = -1; + } } - - yaffs_ReleaseTempBuffer(dev, data, __LINE__); - - return retval; - } -static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, - const __u8 * data, - yaffs_ExtendedTags * tags, - int useReserve) +static int yaffs_write_new_chunk(struct yaffs_dev *dev, + const u8 *data, + struct yaffs_ext_tags *tags, int use_reserver) { int attempts = 0; - int writeOk = 0; + int write_ok = 0; int chunk; - yaffs_InvalidateCheckpoint(dev); + yaffs2_checkpt_invalidate(dev); do { - yaffs_BlockInfo *bi = 0; - int erasedOk = 0; + struct yaffs_block_info *bi = 0; + int erased_ok = 0; - chunk = yaffs_AllocateChunk(dev, useReserve, &bi); + chunk = yaffs_alloc_chunk(dev, use_reserver, &bi); if (chunk < 0) { /* no space */ break; @@ -897,7 +532,7 @@ static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, * * Check the first page we try to write in a block. * If the check passes then we don't need to check any - * more. If the check fails, we check again... + * more. If the check fails, we check again... * If the block has been erased, we don't need to check. * * However, if the block has been prioritised for gc, @@ -909,55 +544,63 @@ static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, * chunk due to power loss. This checking policy should * catch that case with very few checks and thus save a * lot of checks that are most likely not needed. + * + * Mods to the above + * If an erase check fails or the write fails we skip the + * rest of the block. */ - if (bi->gcPrioritise) { - yaffs_DeleteChunk(dev, chunk, 1, __LINE__); - /* try another chunk */ - continue; - } /* let's give it a try */ attempts++; -#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED - bi->skipErasedCheck = 0; -#endif - if (!bi->skipErasedCheck) { - erasedOk = yaffs_CheckChunkErased(dev, chunk); - if (erasedOk != YAFFS_OK) { - T(YAFFS_TRACE_ERROR, - (TSTR ("**>> yaffs chunk %d was not erased" - TENDSTR), chunk)); + if (dev->param.always_check_erased) + bi->skip_erased_check = 0; + + if (!bi->skip_erased_check) { + erased_ok = yaffs_check_chunk_erased(dev, chunk); + if (erased_ok != YAFFS_OK) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>> yaffs chunk %d was not erased", + chunk); - /* try another chunk */ + /* If not erased, delete this one, + * skip rest of block and + * try another chunk */ + yaffs_chunk_del(dev, chunk, 1, __LINE__); + yaffs_skip_rest_of_block(dev); continue; } - bi->skipErasedCheck = 1; } - writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk, - data, tags); - if (writeOk != YAFFS_OK) { - yaffs_HandleWriteChunkError(dev, chunk, erasedOk); - /* try another chunk */ + write_ok = yaffs_wr_chunk_tags_nand(dev, chunk, data, tags); + + if (!bi->skip_erased_check) + write_ok = + yaffs_verify_chunk_written(dev, chunk, data, tags); + + if (write_ok != YAFFS_OK) { + /* Clean up aborted write, skip to next block and + * try another chunk */ + yaffs_handle_chunk_wr_error(dev, chunk, erased_ok); continue; } + bi->skip_erased_check = 1; + /* Copy the data into the robustification buffer */ - yaffs_HandleWriteChunkOk(dev, chunk, data, tags); + yaffs_handle_chunk_wr_ok(dev, chunk, data, tags); - } while (writeOk != YAFFS_OK && - (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); + } while (write_ok != YAFFS_OK && + (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); - if(!writeOk) + if (!write_ok) chunk = -1; if (attempts > 1) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs write required %d attempts" TENDSTR), - attempts)); - - dev->nRetriedWrites += (attempts - 1); + yaffs_trace(YAFFS_TRACE_ERROR, + "**>> yaffs write required %d attempts", + attempts); + dev->n_retried_writes += (attempts - 1); } return chunk; @@ -967,109 +610,97 @@ static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, * Block retiring for handling a broken block. */ -static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND) +static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block) { - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); + struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); - yaffs_InvalidateCheckpoint(dev); - - yaffs_MarkBlockBad(dev, blockInNAND); - - bi->blockState = YAFFS_BLOCK_STATE_DEAD; - bi->gcPrioritise = 0; - bi->needsRetiring = 0; - - dev->nRetiredBlocks++; -} - -/* - * Functions for robustisizing TODO - * - */ + yaffs2_checkpt_invalidate(dev); -static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * tags) -{ -} + yaffs2_clear_oldest_dirty_seq(dev, bi); -static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, - const yaffs_ExtendedTags * tags) -{ -} + if (yaffs_mark_bad(dev, flash_block) != YAFFS_OK) { + if (yaffs_erase_block(dev, flash_block) != YAFFS_OK) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Failed to mark bad and erase block %d", + flash_block); + } else { + struct yaffs_ext_tags tags; + int chunk_id = + flash_block * dev->param.chunks_per_block; -void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi) -{ - if(!bi->gcPrioritise){ - bi->gcPrioritise = 1; - dev->hasPendingPrioritisedGCs = 1; - bi->chunkErrorStrikes ++; + u8 *buffer = yaffs_get_temp_buffer(dev); - if(bi->chunkErrorStrikes > 3){ - bi->needsRetiring = 1; /* Too many stikes, so retire this */ - T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR))); + memset(buffer, 0xff, dev->data_bytes_per_chunk); + memset(&tags, 0, sizeof(tags)); + tags.seq_number = YAFFS_SEQUENCE_BAD_BLOCK; + if (dev->param.write_chunk_tags_fn(dev, chunk_id - + dev->chunk_offset, + buffer, + &tags) != YAFFS_OK) + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Failed to write bad block marker to block %d", + flash_block); + yaffs_release_temp_buffer(dev, buffer); } - } -} -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk) -{ + bi->block_state = YAFFS_BLOCK_STATE_DEAD; + bi->gc_prioritise = 0; + bi->needs_retiring = 0; - int blockInNAND = chunkInNAND / dev->nChunksPerBlock; - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); + dev->n_retired_blocks++; +} - yaffs_HandleChunkError(dev,bi); +/*---------------- Name handling functions ------------*/ +static u16 yaffs_calc_name_sum(const YCHAR *name) +{ + u16 sum = 0; + u16 i = 1; - if(erasedOk ) { - /* Was an actual write failure, so mark the block for retirement */ - bi->needsRetiring = 1; - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND)); + if (!name) + return 0; + while ((*name) && i < (YAFFS_MAX_NAME_LENGTH / 2)) { + /* 0x1f mask is case insensitive */ + sum += ((*name) & 0x1f) * i; + i++; + name++; } - - /* Delete the chunk */ - yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); + return sum; } - -/*---------------- Name handling functions ------------*/ - -static __u16 yaffs_CalcNameSum(const YCHAR * name) +void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name) { - __u16 sum = 0; - __u16 i = 1; - - YUCHAR *bname = (YUCHAR *) name; - if (bname) { - while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) { + memset(obj->short_name, 0, sizeof(obj->short_name)); + if (name && + yaffs_strnlen(name, YAFFS_SHORT_NAME_LENGTH + 1) <= + YAFFS_SHORT_NAME_LENGTH) + yaffs_strcpy(obj->short_name, name); + else + obj->short_name[0] = _Y('\0'); + obj->sum = yaffs_calc_name_sum(name); +} -#ifdef CONFIG_YAFFS_CASE_INSENSITIVE - sum += yaffs_toupper(*bname) * i; +void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj, + const struct yaffs_obj_hdr *oh) +{ +#ifdef CONFIG_YAFFS_AUTO_UNICODE + YCHAR tmp_name[YAFFS_MAX_NAME_LENGTH + 1]; + memset(tmp_name, 0, sizeof(tmp_name)); + yaffs_load_name_from_oh(obj->my_dev, tmp_name, oh->name, + YAFFS_MAX_NAME_LENGTH + 1); + yaffs_set_obj_name(obj, tmp_name); #else - sum += (*bname) * i; + yaffs_set_obj_name(obj, oh->name); #endif - i++; - bname++; - } - } - return sum; } -static void yaffs_SetObjectName(yaffs_Object * obj, const YCHAR * name) +loff_t yaffs_max_file_size(struct yaffs_dev *dev) { -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH) { - yaffs_strcpy(obj->shortName, name); - } else { - obj->shortName[0] = _Y('\0'); - } -#endif - obj->sum = yaffs_CalcNameSum(name); + return ((loff_t) YAFFS_MAX_CHUNK_ID) * dev->data_bytes_per_chunk; } /*-------------------- TNODES ------------------- @@ -1079,381 +710,235 @@ static void yaffs_SetObjectName(yaffs_Object * obj, const YCHAR * name) * in the tnode. */ -/* yaffs_CreateTnodes creates a bunch more tnodes and - * adds them to the tnode free list. - * Don't use this function directly - */ - -static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes) +struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev) { - int i; - int tnodeSize; - yaffs_Tnode *newTnodes; - __u8 *mem; - yaffs_Tnode *curr; - yaffs_Tnode *next; - yaffs_TnodeList *tnl; - - if (nTnodes < 1) - return YAFFS_OK; + struct yaffs_tnode *tn = yaffs_alloc_raw_tnode(dev); - /* Calculate the tnode size in bytes for variable width tnode support. - * Must be a multiple of 32-bits */ - tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; - - /* make these things */ - - newTnodes = YMALLOC(nTnodes * tnodeSize); - mem = (__u8 *)newTnodes; - - if (!newTnodes) { - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs: Could not allocate Tnodes" TENDSTR))); - return YAFFS_FAIL; - } - - /* Hook them into the free list */ -#if 0 - for (i = 0; i < nTnodes - 1; i++) { - newTnodes[i].internal[0] = &newTnodes[i + 1]; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -#endif - } - - newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -#endif - dev->freeTnodes = newTnodes; -#else - /* New hookup for wide tnodes */ - for(i = 0; i < nTnodes -1; i++) { - curr = (yaffs_Tnode *) &mem[i * tnodeSize]; - next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize]; - curr->internal[0] = next; - } - - curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize]; - curr->internal[0] = dev->freeTnodes; - dev->freeTnodes = (yaffs_Tnode *)mem; - -#endif - - - dev->nFreeTnodes += nTnodes; - dev->nTnodesCreated += nTnodes; - - /* Now add this bunch of tnodes to a list for freeing up. - * NB If we can't add this to the management list it isn't fatal - * but it just means we can't free this bunch of tnodes later. - */ - - tnl = YMALLOC(sizeof(yaffs_TnodeList)); - if (!tnl) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs: Could not add tnodes to management list" TENDSTR))); - return YAFFS_FAIL; - - } else { - tnl->tnodes = newTnodes; - tnl->next = dev->allocatedTnodeList; - dev->allocatedTnodeList = tnl; - } - - T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR))); - - return YAFFS_OK; -} - -/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */ - -static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device * dev) -{ - yaffs_Tnode *tn = NULL; - - /* If there are none left make more */ - if (!dev->freeTnodes) { - yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES); - } - - if (dev->freeTnodes) { - tn = dev->freeTnodes; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) { - /* Hoosterman, this thing looks like it isn't in the list */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: Tnode list bug 1" TENDSTR))); - } -#endif - dev->freeTnodes = dev->freeTnodes->internal[0]; - dev->nFreeTnodes--; + if (tn) { + memset(tn, 0, dev->tnode_size); + dev->n_tnodes++; } - return tn; -} - -static yaffs_Tnode *yaffs_GetTnode(yaffs_Device * dev) -{ - yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev); - - if(tn) - memset(tn, 0, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); + dev->checkpoint_blocks_required = 0; /* force recalculation */ return tn; } /* FreeTnode frees up a tnode and puts it back on the free list */ -static void yaffs_FreeTnode(yaffs_Device * dev, yaffs_Tnode * tn) +static void yaffs_free_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn) { - if (tn) { -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) { - /* Hoosterman, this thing looks like it is already in the list */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: Tnode list bug 2" TENDSTR))); - } - tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -#endif - tn->internal[0] = dev->freeTnodes; - dev->freeTnodes = tn; - dev->nFreeTnodes++; - } + yaffs_free_raw_tnode(dev, tn); + dev->n_tnodes--; + dev->checkpoint_blocks_required = 0; /* force recalculation */ } -static void yaffs_DeinitialiseTnodes(yaffs_Device * dev) +static void yaffs_deinit_tnodes_and_objs(struct yaffs_dev *dev) { - /* Free the list of allocated tnodes */ - yaffs_TnodeList *tmp; - - while (dev->allocatedTnodeList) { - tmp = dev->allocatedTnodeList->next; - - YFREE(dev->allocatedTnodeList->tnodes); - YFREE(dev->allocatedTnodeList); - dev->allocatedTnodeList = tmp; - - } - - dev->freeTnodes = NULL; - dev->nFreeTnodes = 0; + yaffs_deinit_raw_tnodes_and_objs(dev); + dev->n_obj = 0; + dev->n_tnodes = 0; } -static void yaffs_InitialiseTnodes(yaffs_Device * dev) +void yaffs_load_tnode_0(struct yaffs_dev *dev, struct yaffs_tnode *tn, + unsigned pos, unsigned val) { - dev->allocatedTnodeList = NULL; - dev->freeTnodes = NULL; - dev->nFreeTnodes = 0; - dev->nTnodesCreated = 0; - -} + u32 *map = (u32 *) tn; + u32 bit_in_map; + u32 bit_in_word; + u32 word_in_map; + u32 mask; + pos &= YAFFS_TNODES_LEVEL0_MASK; + val >>= dev->chunk_grp_bits; -void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos, unsigned val) -{ - __u32 *map = (__u32 *)tn; - __u32 bitInMap; - __u32 bitInWord; - __u32 wordInMap; - __u32 mask; + bit_in_map = pos * dev->tnode_width; + word_in_map = bit_in_map / 32; + bit_in_word = bit_in_map & (32 - 1); - pos &= YAFFS_TNODES_LEVEL0_MASK; - val >>= dev->chunkGroupBits; + mask = dev->tnode_mask << bit_in_word; - bitInMap = pos * dev->tnodeWidth; - wordInMap = bitInMap /32; - bitInWord = bitInMap & (32 -1); + map[word_in_map] &= ~mask; + map[word_in_map] |= (mask & (val << bit_in_word)); - mask = dev->tnodeMask << bitInWord; - - map[wordInMap] &= ~mask; - map[wordInMap] |= (mask & (val << bitInWord)); - - if(dev->tnodeWidth > (32-bitInWord)) { - bitInWord = (32 - bitInWord); - wordInMap++;; - mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord); - map[wordInMap] &= ~mask; - map[wordInMap] |= (mask & (val >> bitInWord)); - } + if (dev->tnode_width > (32 - bit_in_word)) { + bit_in_word = (32 - bit_in_word); + word_in_map++; + mask = + dev->tnode_mask >> bit_in_word; + map[word_in_map] &= ~mask; + map[word_in_map] |= (mask & (val >> bit_in_word)); + } } -static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos) +u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn, + unsigned pos) { - __u32 *map = (__u32 *)tn; - __u32 bitInMap; - __u32 bitInWord; - __u32 wordInMap; - __u32 val; + u32 *map = (u32 *) tn; + u32 bit_in_map; + u32 bit_in_word; + u32 word_in_map; + u32 val; - pos &= YAFFS_TNODES_LEVEL0_MASK; + pos &= YAFFS_TNODES_LEVEL0_MASK; - bitInMap = pos * dev->tnodeWidth; - wordInMap = bitInMap /32; - bitInWord = bitInMap & (32 -1); + bit_in_map = pos * dev->tnode_width; + word_in_map = bit_in_map / 32; + bit_in_word = bit_in_map & (32 - 1); - val = map[wordInMap] >> bitInWord; + val = map[word_in_map] >> bit_in_word; - if(dev->tnodeWidth > (32-bitInWord)) { - bitInWord = (32 - bitInWord); - wordInMap++;; - val |= (map[wordInMap] << bitInWord); - } + if (dev->tnode_width > (32 - bit_in_word)) { + bit_in_word = (32 - bit_in_word); + word_in_map++; + val |= (map[word_in_map] << bit_in_word); + } - val &= dev->tnodeMask; - val <<= dev->chunkGroupBits; + val &= dev->tnode_mask; + val <<= dev->chunk_grp_bits; - return val; + return val; } /* ------------------- End of individual tnode manipulation -----------------*/ /* ---------Functions to manipulate the look-up tree (made up of tnodes) ------ - * The look up tree is represented by the top tnode and the number of topLevel + * The look up tree is represented by the top tnode and the number of top_level * in the tree. 0 means only the level 0 tnode is in the tree. */ /* FindLevel0Tnode finds the level 0 tnode, if one exists. */ -static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev, - yaffs_FileStructure * fStruct, - __u32 chunkId) +struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct, + u32 chunk_id) { + struct yaffs_tnode *tn = file_struct->top; + u32 i; + int required_depth; + int level = file_struct->top_level; - yaffs_Tnode *tn = fStruct->top; - __u32 i; - int requiredTallness; - int level = fStruct->topLevel; + dev = dev; /* Check sane level and chunk Id */ - if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) { + if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) return NULL; - } - if (chunkId > YAFFS_MAX_CHUNK_ID) { + if (chunk_id > YAFFS_MAX_CHUNK_ID) return NULL; - } - /* First check we're tall enough (ie enough topLevel) */ + /* First check we're tall enough (ie enough top_level) */ - i = chunkId >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; + i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; + required_depth = 0; while (i) { i >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; + required_depth++; } - if (requiredTallness > fStruct->topLevel) { - /* Not tall enough, so we can't find it, return NULL. */ - return NULL; - } + if (required_depth > file_struct->top_level) + return NULL; /* Not tall enough, so we can't find it */ /* Traverse down to level 0 */ while (level > 0 && tn) { - tn = tn-> - internal[(chunkId >> - ( YAFFS_TNODES_LEVEL0_BITS + - (level - 1) * - YAFFS_TNODES_INTERNAL_BITS) - ) & - YAFFS_TNODES_INTERNAL_MASK]; + tn = tn->internal[(chunk_id >> + (YAFFS_TNODES_LEVEL0_BITS + + (level - 1) * + YAFFS_TNODES_INTERNAL_BITS)) & + YAFFS_TNODES_INTERNAL_MASK]; level--; - } return tn; } -/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree. +/* add_find_tnode_0 finds the level 0 tnode if it exists, + * otherwise first expands the tree. * This happens in two steps: * 1. If the tree isn't tall enough, then make it taller. * 2. Scan down the tree towards the level 0 tnode adding tnodes if required. * * Used when modifying the tree. * - * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will - * be plugged into the ttree. + * If the tn argument is NULL, then a fresh tnode will be added otherwise the + * specified tn will be plugged into the ttree. */ -static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev, - yaffs_FileStructure * fStruct, - __u32 chunkId, - yaffs_Tnode *passedTn) +struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct, + u32 chunk_id, + struct yaffs_tnode *passed_tn) { - - int requiredTallness; + int required_depth; int i; int l; - yaffs_Tnode *tn; - - __u32 x; - + struct yaffs_tnode *tn; + u32 x; /* Check sane level and page Id */ - if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL) { + if (file_struct->top_level < 0 || + file_struct->top_level > YAFFS_TNODES_MAX_LEVEL) return NULL; - } - if (chunkId > YAFFS_MAX_CHUNK_ID) { + if (chunk_id > YAFFS_MAX_CHUNK_ID) return NULL; - } - /* First check we're tall enough (ie enough topLevel) */ + /* First check we're tall enough (ie enough top_level) */ - x = chunkId >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; + x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; + required_depth = 0; while (x) { x >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; + required_depth++; } + if (required_depth > file_struct->top_level) { + /* Not tall enough, gotta make the tree taller */ + for (i = file_struct->top_level; i < required_depth; i++) { - if (requiredTallness > fStruct->topLevel) { - /* Not tall enough,gotta make the tree taller */ - for (i = fStruct->topLevel; i < requiredTallness; i++) { - - tn = yaffs_GetTnode(dev); + tn = yaffs_get_tnode(dev); if (tn) { - tn->internal[0] = fStruct->top; - fStruct->top = tn; + tn->internal[0] = file_struct->top; + file_struct->top = tn; + file_struct->top_level++; } else { - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs: no more tnodes" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs: no more tnodes"); + return NULL; } } - - fStruct->topLevel = requiredTallness; } /* Traverse down to level 0, adding anything we need */ - l = fStruct->topLevel; - tn = fStruct->top; + l = file_struct->top_level; + tn = file_struct->top; - if(l > 0) { + if (l > 0) { while (l > 0 && tn) { - x = (chunkId >> - ( YAFFS_TNODES_LEVEL0_BITS + + x = (chunk_id >> + (YAFFS_TNODES_LEVEL0_BITS + (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) & YAFFS_TNODES_INTERNAL_MASK; - - if((l>1) && !tn->internal[x]){ + if ((l > 1) && !tn->internal[x]) { /* Add missing non-level-zero tnode */ - tn->internal[x] = yaffs_GetTnode(dev); - - } else if(l == 1) { + tn->internal[x] = yaffs_get_tnode(dev); + if (!tn->internal[x]) + return NULL; + } else if (l == 1) { /* Looking from level 1 at level 0 */ - if (passedTn) { - /* If we already have one, then release it.*/ - if(tn->internal[x]) - yaffs_FreeTnode(dev,tn->internal[x]); - tn->internal[x] = passedTn; + if (passed_tn) { + /* If we already have one, release it */ + if (tn->internal[x]) + yaffs_free_tnode(dev, + tn->internal[x]); + tn->internal[x] = passed_tn; - } else if(!tn->internal[x]) { + } else if (!tn->internal[x]) { /* Don't have one, none passed in */ - tn->internal[x] = yaffs_GetTnode(dev); + tn->internal[x] = yaffs_get_tnode(dev); + if (!tn->internal[x]) + return NULL; } } @@ -1462,2979 +947,2479 @@ static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev, } } else { /* top is level 0 */ - if(passedTn) { - memcpy(tn,passedTn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); - yaffs_FreeTnode(dev,passedTn); + if (passed_tn) { + memcpy(tn, passed_tn, + (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8); + yaffs_free_tnode(dev, passed_tn); } } return tn; } -static int yaffs_FindChunkInGroup(yaffs_Device * dev, int theChunk, - yaffs_ExtendedTags * tags, int objectId, - int chunkInInode) +static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id, + int chunk_obj) +{ + return (tags->chunk_id == chunk_obj && + tags->obj_id == obj_id && + !tags->is_deleted) ? 1 : 0; + +} + +static int yaffs_find_chunk_in_group(struct yaffs_dev *dev, int the_chunk, + struct yaffs_ext_tags *tags, int obj_id, + int inode_chunk) { int j; - for (j = 0; theChunk && j < dev->chunkGroupSize; j++) { - if (yaffs_CheckChunkBit - (dev, theChunk / dev->nChunksPerBlock, - theChunk % dev->nChunksPerBlock)) { - yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, - tags); - if (yaffs_TagsMatch(tags, objectId, chunkInInode)) { - /* found it; */ - return theChunk; + for (j = 0; the_chunk && j < dev->chunk_grp_size; j++) { + if (yaffs_check_chunk_bit + (dev, the_chunk / dev->param.chunks_per_block, + the_chunk % dev->param.chunks_per_block)) { + if (dev->chunk_grp_size == 1) + return the_chunk; + else { + yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL, + tags); + if (yaffs_tags_match(tags, + obj_id, inode_chunk)) { + /* found it; */ + return the_chunk; + } } } - theChunk++; + the_chunk++; } return -1; } -static void yaffs_SoftDeleteChunk(yaffs_Device * dev, int chunk) +static int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk, + struct yaffs_ext_tags *tags) { + /*Get the Tnode, then get the level 0 offset chunk offset */ + struct yaffs_tnode *tn; + int the_chunk = -1; + struct yaffs_ext_tags local_tags; + int ret_val = -1; + struct yaffs_dev *dev = in->my_dev; - yaffs_BlockInfo *theBlock; - - T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk)); - - theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock); - if (theBlock) { - theBlock->softDeletions++; - dev->nFreeChunks++; + if (!tags) { + /* Passed a NULL, so use our own tags space */ + tags = &local_tags; } -} -/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file. - * All soft deleting does is increment the block's softdelete count and pulls the chunk out - * of the tnode. - * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted. - */ + tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); -static int yaffs_SoftDeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, - __u32 level, int chunkOffset) -{ - int i; - int theChunk; - int allDone = 1; - yaffs_Device *dev = in->myDev; + if (!tn) + return ret_val; - if (tn) { - if (level > 0) { + the_chunk = yaffs_get_group_base(dev, tn, inode_chunk); - for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; - i--) { - if (tn->internal[i]) { - allDone = - yaffs_SoftDeleteWorker(in, - tn-> - internal[i], - level - 1, - (chunkOffset - << - YAFFS_TNODES_INTERNAL_BITS) - + i); - if (allDone) { - yaffs_FreeTnode(dev, - tn-> - internal[i]); - tn->internal[i] = NULL; - } else { - /* Hoosterman... how could this happen? */ - } - } - } - return (allDone) ? 1 : 0; - } else if (level == 0) { - - for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) { - theChunk = yaffs_GetChunkGroupBase(dev,tn,i); - if (theChunk) { - /* Note this does not find the real chunk, only the chunk group. - * We make an assumption that a chunk group is not larger than - * a block. - */ - yaffs_SoftDeleteChunk(dev, theChunk); - yaffs_PutLevel0Tnode(dev,tn,i,0); - } - - } - return 1; + ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id, + inode_chunk); + return ret_val; +} - } +static int yaffs_find_del_file_chunk(struct yaffs_obj *in, int inode_chunk, + struct yaffs_ext_tags *tags) +{ + /* Get the Tnode, then get the level 0 offset chunk offset */ + struct yaffs_tnode *tn; + int the_chunk = -1; + struct yaffs_ext_tags local_tags; + struct yaffs_dev *dev = in->my_dev; + int ret_val = -1; + if (!tags) { + /* Passed a NULL, so use our own tags space */ + tags = &local_tags; } - return 1; - -} + tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); -static void yaffs_SoftDeleteFile(yaffs_Object * obj) -{ - if (obj->deleted && - obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) { - if (obj->nDataChunks <= 0) { - /* Empty file with no duplicate object headers, just delete it immediately */ - yaffs_FreeTnode(obj->myDev, - obj->variant.fileVariant.top); - obj->variant.fileVariant.top = NULL; - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: Deleting empty file %d" TENDSTR), - obj->objectId)); - yaffs_DoGenericObjectDeletion(obj); - } else { - yaffs_SoftDeleteWorker(obj, - obj->variant.fileVariant.top, - obj->variant.fileVariant. - topLevel, 0); - obj->softDeleted = 1; - } - } -} + if (!tn) + return ret_val; -/* Pruning removes any part of the file structure tree that is beyond the - * 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 - * level 0 tnode entries must be zeroed out. - * Could also use this for file deletion, but that's probably better handled - * by a special case. - */ + the_chunk = yaffs_get_group_base(dev, tn, inode_chunk); -static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device * dev, yaffs_Tnode * tn, - __u32 level, int del0) -{ - int i; - int hasData; + ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id, + inode_chunk); - if (tn) { - hasData = 0; + /* Delete the entry in the filestructure (if found) */ + if (ret_val != -1) + yaffs_load_tnode_0(dev, tn, inode_chunk, 0); - for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i] && level > 0) { - tn->internal[i] = - yaffs_PruneWorker(dev, tn->internal[i], - level - 1, - (i == 0) ? del0 : 1); - } + return ret_val; +} - if (tn->internal[i]) { - hasData++; - } - } +int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk, + int nand_chunk, int in_scan) +{ + /* NB in_scan is zero unless scanning. + * For forward scanning, in_scan is > 0; + * for backward scanning in_scan is < 0 + * + * nand_chunk = 0 is a dummy insert to make sure the tnodes are there. + */ - if (hasData == 0 && del0) { - /* Free and return NULL */ + struct yaffs_tnode *tn; + struct yaffs_dev *dev = in->my_dev; + int existing_cunk; + struct yaffs_ext_tags existing_tags; + struct yaffs_ext_tags new_tags; + unsigned existing_serial, new_serial; - yaffs_FreeTnode(dev, tn); - tn = NULL; + if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) { + /* Just ignore an attempt at putting a chunk into a non-file + * during scanning. + * If it is not during Scanning then something went wrong! + */ + if (!in_scan) { + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy:attempt to put data chunk into a non-file" + ); + BUG(); } + yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); + return YAFFS_OK; } - return tn; - -} + tn = yaffs_add_find_tnode_0(dev, + &in->variant.file_variant, + inode_chunk, NULL); + if (!tn) + return YAFFS_FAIL; -static int yaffs_PruneFileStructure(yaffs_Device * dev, - yaffs_FileStructure * fStruct) -{ - int i; - int hasData; - int done = 0; - yaffs_Tnode *tn; + if (!nand_chunk) + /* Dummy insert, bail now */ + return YAFFS_OK; - if (fStruct->topLevel > 0) { - fStruct->top = - yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0); + existing_cunk = yaffs_get_group_base(dev, tn, inode_chunk); - /* Now we have a tree with all the non-zero branches NULL but the height - * is the same as it was. - * Let's see if we can trim internal tnodes to shorten the tree. - * We can do this if only the 0th element in the tnode is in use - * (ie all the non-zero are NULL) + if (in_scan != 0) { + /* If we're scanning then we need to test for duplicates + * NB This does not need to be efficient since it should only + * happen when the power fails during a write, then only one + * chunk should ever be affected. + * + * Correction for YAFFS2: This could happen quite a lot and we + * need to think about efficiency! TODO + * Update: For backward scanning we don't need to re-read tags + * so this is quite cheap. */ - while (fStruct->topLevel && !done) { - tn = fStruct->top; + if (existing_cunk > 0) { + /* NB Right now existing chunk will not be real + * chunk_id if the chunk group size > 1 + * thus we have to do a FindChunkInFile to get the + * real chunk id. + * + * We have a duplicate now we need to decide which + * one to use: + * + * Backwards scanning YAFFS2: The old one is what + * we use, dump the new one. + * YAFFS1: Get both sets of tags and compare serial + * numbers. + */ - hasData = 0; - for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i]) { - hasData++; - } - } + if (in_scan > 0) { + /* Only do this for forward scanning */ + yaffs_rd_chunk_tags_nand(dev, + nand_chunk, + NULL, &new_tags); - if (!hasData) { - fStruct->top = tn->internal[0]; - fStruct->topLevel--; - yaffs_FreeTnode(dev, tn); - } else { - done = 1; + /* Do a proper find */ + existing_cunk = + yaffs_find_chunk_in_file(in, inode_chunk, + &existing_tags); } - } - } - return YAFFS_OK; -} + if (existing_cunk <= 0) { + /*Hoosterman - how did this happen? */ -/*-------------------- End of File Structure functions.-------------------*/ + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: existing chunk < 0 in scan" + ); -/* yaffs_CreateFreeObjects creates a bunch more objects and - * adds them to the object free list. - */ -static int yaffs_CreateFreeObjects(yaffs_Device * dev, int nObjects) -{ - int i; - yaffs_Object *newObjects; - yaffs_ObjectList *list; + } - if (nObjects < 1) - return YAFFS_OK; + /* NB The deleted flags should be false, otherwise + * the chunks will not be loaded during a scan + */ - /* make these things */ - newObjects = YMALLOC(nObjects * sizeof(yaffs_Object)); - list = YMALLOC(sizeof(yaffs_ObjectList)); + if (in_scan > 0) { + new_serial = new_tags.serial_number; + existing_serial = existing_tags.serial_number; + } - if (!newObjects || !list) { - if(newObjects) - YFREE(newObjects); - if(list) - YFREE(list); - T(YAFFS_TRACE_ALLOCATE, - (TSTR("yaffs: Could not allocate more objects" TENDSTR))); - return YAFFS_FAIL; - } + if ((in_scan > 0) && + (existing_cunk <= 0 || + ((existing_serial + 1) & 3) == new_serial)) { + /* Forward scanning. + * Use new + * Delete the old one and drop through to + * update the tnode + */ + yaffs_chunk_del(dev, existing_cunk, 1, + __LINE__); + } else { + /* Backward scanning or we want to use the + * existing one + * Delete the new one and return early so that + * the tnode isn't changed + */ + yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); + return YAFFS_OK; + } + } - /* Hook them into the free list */ - for (i = 0; i < nObjects - 1; i++) { - newObjects[i].siblings.next = - (struct list_head *)(&newObjects[i + 1]); } - newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects; - dev->freeObjects = newObjects; - dev->nFreeObjects += nObjects; - dev->nObjectsCreated += nObjects; - - /* Now add this bunch of Objects to a list for freeing up. */ + if (existing_cunk == 0) + in->n_data_chunks++; - list->objects = newObjects; - list->next = dev->allocatedObjectList; - dev->allocatedObjectList = list; + yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk); return YAFFS_OK; } - -/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */ -static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device * dev) +static void yaffs_soft_del_chunk(struct yaffs_dev *dev, int chunk) { - yaffs_Object *tn = NULL; + struct yaffs_block_info *the_block; + unsigned block_no; + + yaffs_trace(YAFFS_TRACE_DELETION, "soft delete chunk %d", chunk); - /* If there are none left make more */ - if (!dev->freeObjects) { - yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS); + block_no = chunk / dev->param.chunks_per_block; + the_block = yaffs_get_block_info(dev, block_no); + if (the_block) { + the_block->soft_del_pages++; + dev->n_free_chunks++; + yaffs2_update_oldest_dirty_seq(dev, block_no, the_block); } +} - if (dev->freeObjects) { - tn = dev->freeObjects; - dev->freeObjects = - (yaffs_Object *) (dev->freeObjects->siblings.next); - dev->nFreeObjects--; +/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all + * the chunks in the file. + * All soft deleting does is increment the block's softdelete count and pulls + * the chunk out of the tnode. + * Thus, essentially this is the same as DeleteWorker except that the chunks + * are soft deleted. + */ - /* Now sweeten it up... */ +static int yaffs_soft_del_worker(struct yaffs_obj *in, struct yaffs_tnode *tn, + u32 level, int chunk_offset) +{ + int i; + int the_chunk; + int all_done = 1; + struct yaffs_dev *dev = in->my_dev; - memset(tn, 0, sizeof(yaffs_Object)); - tn->myDev = dev; - tn->chunkId = -1; - tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN; - INIT_LIST_HEAD(&(tn->hardLinks)); - INIT_LIST_HEAD(&(tn->hashLink)); - INIT_LIST_HEAD(&tn->siblings); + if (!tn) + return 1; - /* Add it to the lost and found directory. - * NB Can't put root or lostNFound in lostNFound so - * check if lostNFound exists first - */ - if (dev->lostNFoundDir) { - yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn); + if (level > 0) { + for (i = YAFFS_NTNODES_INTERNAL - 1; + all_done && i >= 0; + i--) { + if (tn->internal[i]) { + all_done = + yaffs_soft_del_worker(in, + tn->internal[i], + level - 1, + (chunk_offset << + YAFFS_TNODES_INTERNAL_BITS) + + i); + if (all_done) { + yaffs_free_tnode(dev, + tn->internal[i]); + tn->internal[i] = NULL; + } else { + /* Can this happen? */ + } + } } + return (all_done) ? 1 : 0; } - return tn; + /* level 0 */ + for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) { + the_chunk = yaffs_get_group_base(dev, tn, i); + if (the_chunk) { + yaffs_soft_del_chunk(dev, the_chunk); + yaffs_load_tnode_0(dev, tn, i, 0); + } + } + return 1; } -static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device * dev, int number, - __u32 mode) +static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj) { + struct yaffs_dev *dev = obj->my_dev; + struct yaffs_obj *parent; - yaffs_Object *obj = - yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); - if (obj) { - 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->yst_mode = mode; - obj->myDev = dev; - obj->chunkId = 0; /* Not a valid chunk. */ - } + yaffs_verify_obj_in_dir(obj); + parent = obj->parent; - return obj; + yaffs_verify_dir(parent); -} - -static void yaffs_UnhashObject(yaffs_Object * tn) -{ - int bucket; - yaffs_Device *dev = tn->myDev; + if (dev && dev->param.remove_obj_fn) + dev->param.remove_obj_fn(obj); - /* If it is still linked into the bucket list, free from the list */ - if (!list_empty(&tn->hashLink)) { - list_del_init(&tn->hashLink); - bucket = yaffs_HashFunction(tn->objectId); - dev->objectBucket[bucket].count--; - } + list_del_init(&obj->siblings); + obj->parent = NULL; + yaffs_verify_dir(parent); } -/* FreeObject frees up a Object and puts it back on the free list */ -static void yaffs_FreeObject(yaffs_Object * tn) +void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj) { - - yaffs_Device *dev = tn->myDev; - -/* XXX U-BOOT XXX */ -#if 0 -#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; + if (!directory) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: Trying to add an object to a null pointer directory" + ); + BUG(); return; } -#endif -#endif - yaffs_UnhashObject(tn); - - /* Link into the free list. */ - tn->siblings.next = (struct list_head *)(dev->freeObjects); - dev->freeObjects = tn; - dev->nFreeObjects++; -} - -/* XXX U-BOOT XXX */ -#if 0 -#ifdef __KERNEL__ - -void yaffs_HandleDeferedFree(yaffs_Object * obj) -{ - if (obj->deferedFree) { - yaffs_FreeObject(obj); + if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: Trying to add an object to a non-directory" + ); + BUG(); } -} -#endif -#endif + if (obj->siblings.prev == NULL) { + /* Not initialised */ + BUG(); + } -static void yaffs_DeinitialiseObjects(yaffs_Device * dev) -{ - /* Free the list of allocated Objects */ + yaffs_verify_dir(directory); - yaffs_ObjectList *tmp; + yaffs_remove_obj_from_dir(obj); - while (dev->allocatedObjectList) { - tmp = dev->allocatedObjectList->next; - YFREE(dev->allocatedObjectList->objects); - YFREE(dev->allocatedObjectList); + /* Now add it */ + list_add(&obj->siblings, &directory->variant.dir_variant.children); + obj->parent = directory; - dev->allocatedObjectList = tmp; + if (directory == obj->my_dev->unlinked_dir + || directory == obj->my_dev->del_dir) { + obj->unlinked = 1; + obj->my_dev->n_unlinked_files++; + obj->rename_allowed = 0; } - dev->freeObjects = NULL; - dev->nFreeObjects = 0; + yaffs_verify_dir(directory); + yaffs_verify_obj_in_dir(obj); } -static void yaffs_InitialiseObjects(yaffs_Device * dev) +static int yaffs_change_obj_name(struct yaffs_obj *obj, + struct yaffs_obj *new_dir, + const YCHAR *new_name, int force, int shadows) { - int i; + int unlink_op; + int del_op; + struct yaffs_obj *existing_target; - dev->allocatedObjectList = NULL; - dev->freeObjects = NULL; - dev->nFreeObjects = 0; + if (new_dir == NULL) + new_dir = obj->parent; /* use the old directory */ - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - INIT_LIST_HEAD(&dev->objectBucket[i].list); - dev->objectBucket[i].count = 0; + if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: yaffs_change_obj_name: new_dir is not a directory" + ); + BUG(); } -} + unlink_op = (new_dir == obj->my_dev->unlinked_dir); + del_op = (new_dir == obj->my_dev->del_dir); -static int yaffs_FindNiceObjectBucket(yaffs_Device * dev) -{ - static int x = 0; - int i; - int l = 999; - int lowest = 999999; + existing_target = yaffs_find_by_name(new_dir, new_name); - /* First let's see if we can find one that's empty. */ - - for (i = 0; i < 10 && lowest > 0; i++) { - x++; - x %= YAFFS_NOBJECT_BUCKETS; - if (dev->objectBucket[x].count < lowest) { - lowest = dev->objectBucket[x].count; - l = x; - } - - } - - /* If we didn't find an empty list, then try - * looking a bit further for a short one + /* If the object is a file going into the unlinked directory, + * then it is OK to just stuff it in since duplicate names are OK. + * else only proceed if the new name does not exist and we're putting + * it into a directory. */ + if (!(unlink_op || del_op || force || + shadows > 0 || !existing_target) || + new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) + return YAFFS_FAIL; - for (i = 0; i < 10 && lowest > 3; i++) { - x++; - x %= YAFFS_NOBJECT_BUCKETS; - if (dev->objectBucket[x].count < lowest) { - lowest = dev->objectBucket[x].count; - l = x; - } + yaffs_set_obj_name(obj, new_name); + obj->dirty = 1; + yaffs_add_obj_to_dir(new_dir, obj); - } + if (unlink_op) + obj->unlinked = 1; - return l; + /* If it is a deletion then we mark it as a shrink for gc */ + if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >= 0) + return YAFFS_OK; + + return YAFFS_FAIL; } -static int yaffs_CreateNewObjectNumber(yaffs_Device * dev) +/*------------------------ Short Operations Cache ------------------------------ + * In many situations where there is no high level buffering 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. + * In Linux, the page cache provides read buffering and the short op cache + * provides write buffering. + * + * There are a small number (~10) of cache chunks per device so that we don't + * need a very intelligent search. + */ + +static int yaffs_obj_cache_dirty(struct yaffs_obj *obj) { - int bucket = yaffs_FindNiceObjectBucket(dev); + struct yaffs_dev *dev = obj->my_dev; + int i; + struct yaffs_cache *cache; + int n_caches = obj->my_dev->param.n_caches; - /* Now find an object value that has not already been taken - * by scanning the list. - */ + for (i = 0; i < n_caches; i++) { + cache = &dev->cache[i]; + if (cache->object == obj && cache->dirty) + return 1; + } - int found = 0; - struct list_head *i; + return 0; +} - __u32 n = (__u32) bucket; +static void yaffs_flush_file_cache(struct yaffs_obj *obj) +{ + struct yaffs_dev *dev = obj->my_dev; + int lowest = -99; /* Stop compiler whining. */ + int i; + struct yaffs_cache *cache; + int chunk_written = 0; + int n_caches = obj->my_dev->param.n_caches; - /* yaffs_CheckObjectHashSanity(); */ + if (n_caches < 1) + return; + do { + cache = NULL; - while (!found) { - found = 1; - n += YAFFS_NOBJECT_BUCKETS; - if (1 || dev->objectBucket[bucket].count > 0) { - list_for_each(i, &dev->objectBucket[bucket].list) { - /* If there is already one in the list */ - if (i - && list_entry(i, yaffs_Object, - hashLink)->objectId == n) { - found = 0; + /* Find the lowest dirty chunk for this object */ + for (i = 0; i < n_caches; i++) { + if (dev->cache[i].object == obj && + dev->cache[i].dirty) { + if (!cache || + dev->cache[i].chunk_id < lowest) { + cache = &dev->cache[i]; + lowest = cache->chunk_id; } } } - } + if (cache && !cache->locked) { + /* Write it out and free it up */ + chunk_written = + yaffs_wr_data_obj(cache->object, + cache->chunk_id, + cache->data, + cache->n_bytes, 1); + cache->dirty = 0; + cache->object = NULL; + } + } while (cache && chunk_written > 0); - return n; + if (cache) + /* Hoosterman, disk full while writing cache out. */ + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: no space during cache write"); } -static void yaffs_HashObject(yaffs_Object * in) +/*yaffs_flush_whole_cache(dev) + * + * + */ + +void yaffs_flush_whole_cache(struct yaffs_dev *dev) { - int bucket = yaffs_HashFunction(in->objectId); - yaffs_Device *dev = in->myDev; + struct yaffs_obj *obj; + int n_caches = dev->param.n_caches; + int i; - list_add(&in->hashLink, &dev->objectBucket[bucket].list); - dev->objectBucket[bucket].count++; + /* Find a dirty object in the cache and flush it... + * until there are no further dirty objects. + */ + do { + obj = NULL; + for (i = 0; i < n_caches && !obj; i++) { + if (dev->cache[i].object && dev->cache[i].dirty) + obj = dev->cache[i].object; + } + if (obj) + yaffs_flush_file_cache(obj); + } while (obj); } -yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number) +/* Grab us a cache 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 struct yaffs_cache *yaffs_grab_chunk_worker(struct yaffs_dev *dev) { - int bucket = yaffs_HashFunction(number); - struct list_head *i; - yaffs_Object *in; + int i; - list_for_each(i, &dev->objectBucket[bucket].list) { - /* Look if it is in the list */ - if (i) { - in = list_entry(i, yaffs_Object, hashLink); - if (in->objectId == number) { -/* XXX U-BOOT XXX */ -#if 0 -#ifdef __KERNEL__ - /* Don't tell the VFS about this one if it is defered free */ - if (in->deferedFree) - return NULL; -#endif -#endif - return in; - } + if (dev->param.n_caches > 0) { + for (i = 0; i < dev->param.n_caches; i++) { + if (!dev->cache[i].object) + return &dev->cache[i]; } } - return NULL; } -yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number, - yaffs_ObjectType type) +static struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev) { + struct yaffs_cache *cache; + struct yaffs_obj *the_obj; + int usage; + int i; + int pushout; - yaffs_Object *theObject; - yaffs_Tnode *tn = NULL; - - if (number < 0) { - number = yaffs_CreateNewObjectNumber(dev); - } - - theObject = yaffs_AllocateEmptyObject(dev); - if(!theObject) + if (dev->param.n_caches < 1) return NULL; - if(type == YAFFS_OBJECT_TYPE_FILE){ - tn = yaffs_GetTnode(dev); - if(!tn){ - yaffs_FreeObject(theObject); - return NULL; - } - } + /* Try find a non-dirty one... */ + cache = yaffs_grab_chunk_worker(dev); + if (!cache) { + /* They were all dirty, find the LRU object and flush + * its cache, then find again. + * NB what's here is not very accurate, + * we actually flush the object with the LRU chunk. + */ - if (theObject) { - theObject->fake = 0; - theObject->renameAllowed = 1; - theObject->unlinkAllowed = 1; - theObject->objectId = number; - yaffs_HashObject(theObject); - theObject->variantType = type; -#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]; + /* With locking we can't assume we can use entry zero, + * Set the_obj to a valid pointer for Coverity. */ + the_obj = dev->cache[0].object; + usage = -1; + cache = NULL; + pushout = -1; -#else + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].object && + !dev->cache[i].locked && + (dev->cache[i].last_use < usage || + !cache)) { + usage = dev->cache[i].last_use; + the_obj = dev->cache[i].object; + cache = &dev->cache[i]; + pushout = i; + } + } - theObject->yst_atime = theObject->yst_mtime = - theObject->yst_ctime = Y_CURRENT_TIME; -#endif - switch (type) { - case YAFFS_OBJECT_TYPE_FILE: - theObject->variant.fileVariant.fileSize = 0; - theObject->variant.fileVariant.scannedFileSize = 0; - theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */ - theObject->variant.fileVariant.topLevel = 0; - theObject->variant.fileVariant.top = tn; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - INIT_LIST_HEAD(&theObject->variant.directoryVariant. - children); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - case YAFFS_OBJECT_TYPE_HARDLINK: - case YAFFS_OBJECT_TYPE_SPECIAL: - /* No action required */ - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* todo this should not happen */ - break; + if (!cache || cache->dirty) { + /* Flush and try again */ + yaffs_flush_file_cache(the_obj); + cache = yaffs_grab_chunk_worker(dev); } } - - return theObject; + return cache; } -static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device * dev, - int number, - yaffs_ObjectType type) +/* Find a cached chunk */ +static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj, + int chunk_id) { - yaffs_Object *theObject = NULL; - - if (number > 0) { - theObject = yaffs_FindObjectByNumber(dev, number); - } + struct yaffs_dev *dev = obj->my_dev; + int i; - if (!theObject) { - theObject = yaffs_CreateNewObject(dev, number, type); - } + if (dev->param.n_caches < 1) + return NULL; - return theObject; + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].object == obj && + dev->cache[i].chunk_id == chunk_id) { + dev->cache_hits++; + return &dev->cache[i]; + } + } + return NULL; } - -static YCHAR *yaffs_CloneString(const YCHAR * str) +/* Mark the chunk for the least recently used algorithym */ +static void yaffs_use_cache(struct yaffs_dev *dev, struct yaffs_cache *cache, + int is_write) { - YCHAR *newStr = NULL; + int i; - if (str && *str) { - newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR)); - if(newStr) - yaffs_strcpy(newStr, str); - } + if (dev->param.n_caches < 1) + return; + + if (dev->cache_last_use < 0 || + dev->cache_last_use > 100000000) { + /* Reset the cache usages */ + for (i = 1; i < dev->param.n_caches; i++) + dev->cache[i].last_use = 0; - return newStr; + dev->cache_last_use = 0; + } + dev->cache_last_use++; + cache->last_use = dev->cache_last_use; + if (is_write) + cache->dirty = 1; } -/* - * 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) +/* 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 yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type, - yaffs_Object * parent, - const YCHAR * name, - __u32 mode, - __u32 uid, - __u32 gid, - yaffs_Object * equivalentObject, - const YCHAR * aliasString, __u32 rdev) +static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object, int chunk_id) { - yaffs_Object *in; - YCHAR *str = NULL; + struct yaffs_cache *cache; - yaffs_Device *dev = parent->myDev; + if (object->my_dev->param.n_caches > 0) { + cache = yaffs_find_chunk_cache(object, chunk_id); - /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/ - if (yaffs_FindObjectByName(parent, name)) { - return NULL; + if (cache) + cache->object = NULL; } +} - in = yaffs_CreateNewObject(dev, -1, type); +/* Invalidate all the cache pages associated with this object + * Do this whenever ther file is deleted or resized. + */ +static void yaffs_invalidate_whole_cache(struct yaffs_obj *in) +{ + int i; + struct yaffs_dev *dev = in->my_dev; - if(type == YAFFS_OBJECT_TYPE_SYMLINK){ - str = yaffs_CloneString(aliasString); - if(!str){ - yaffs_FreeObject(in); - return NULL; + if (dev->param.n_caches > 0) { + /* Invalidate it. */ + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].object == in) + dev->cache[i].object = NULL; } } +} +static void yaffs_unhash_obj(struct yaffs_obj *obj) +{ + int bucket; + struct yaffs_dev *dev = obj->my_dev; + /* If it is still linked into the bucket list, free from the list */ + if (!list_empty(&obj->hash_link)) { + list_del_init(&obj->hash_link); + bucket = yaffs_hash_fn(obj->obj_id); + dev->obj_bucket[bucket].count--; + } +} - if (in) { - in->chunkId = -1; - in->valid = 1; - in->variantType = type; - - in->yst_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[1]; - -#else - in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME; - - in->yst_rdev = rdev; - in->yst_uid = uid; - in->yst_gid = gid; -#endif - in->nDataChunks = 0; - - yaffs_SetObjectName(in, name); - in->dirty = 1; - - yaffs_AddObjectToDirectory(parent, in); - - in->myDev = parent->myDev; - - switch (type) { - case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symLinkVariant.alias = str; - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - in->variant.hardLinkVariant.equivalentObject = - equivalentObject; - in->variant.hardLinkVariant.equivalentObjectId = - equivalentObject->objectId; - list_add(&in->hardLinks, &equivalentObject->hardLinks); - break; - case YAFFS_OBJECT_TYPE_FILE: - case YAFFS_OBJECT_TYPE_DIRECTORY: - case YAFFS_OBJECT_TYPE_SPECIAL: - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* do nothing */ - break; - } +/* FreeObject frees up a Object and puts it back on the free list */ +static void yaffs_free_obj(struct yaffs_obj *obj) +{ + struct yaffs_dev *dev; - if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) { - /* Could not create the object header, fail the creation */ - yaffs_DestroyObject(in); - in = NULL; - } + if (!obj) { + BUG(); + return; + } + dev = obj->my_dev; + yaffs_trace(YAFFS_TRACE_OS, "FreeObject %p inode %p", + obj, obj->my_inode); + if (obj->parent) + BUG(); + if (!list_empty(&obj->siblings)) + BUG(); + if (obj->my_inode) { + /* We're still hooked up to a cached inode. + * Don't delete now, but mark for later deletion + */ + obj->defered_free = 1; + return; } - return in; -} + yaffs_unhash_obj(obj); -yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid) -{ - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode, - uid, gid, NULL, NULL, 0); + yaffs_free_raw_obj(dev, obj); + dev->n_obj--; + dev->checkpoint_blocks_required = 0; /* force recalculation */ } -yaffs_Object *yaffs_MknodDirectory(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid) +void yaffs_handle_defered_free(struct yaffs_obj *obj) { - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name, - mode, uid, gid, NULL, NULL, 0); + if (obj->defered_free) + yaffs_free_obj(obj); } -yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid, __u32 rdev) +static int yaffs_generic_obj_del(struct yaffs_obj *in) { - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode, - uid, gid, NULL, NULL, rdev); -} + /* Iinvalidate the file's data in the cache, without flushing. */ + yaffs_invalidate_whole_cache(in); -yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid, - const YCHAR * alias) -{ - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode, - uid, gid, NULL, alias, 0); -} + if (in->my_dev->param.is_yaffs2 && in->parent != in->my_dev->del_dir) { + /* Move to unlinked directory so we have a deletion record */ + yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0, + 0); + } -/* yaffs_Link returns the object id of the equivalent object.*/ -yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name, - yaffs_Object * equivalentObject) -{ - /* Get the real object in case we were fed a hard link as an equivalent object */ - equivalentObject = yaffs_GetEquivalentObject(equivalentObject); + yaffs_remove_obj_from_dir(in); + yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__); + in->hdr_chunk = 0; - if (yaffs_MknodObject - (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0, - equivalentObject, NULL, 0)) { - return equivalentObject; - } else { - return NULL; - } + yaffs_free_obj(in); + return YAFFS_OK; } -static int yaffs_ChangeObjectName(yaffs_Object * obj, yaffs_Object * newDir, - const YCHAR * newName, int force, int shadows) +static void yaffs_soft_del_file(struct yaffs_obj *obj) { - int unlinkOp; - int deleteOp; - - yaffs_Object *existingTarget; - - if (newDir == NULL) { - newDir = obj->parent; /* use the old directory */ - } - - if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragendy: yaffs_ChangeObjectName: newDir is not a directory" - TENDSTR))); - YBUG(); - } + if (!obj->deleted || + obj->variant_type != YAFFS_OBJECT_TYPE_FILE || + obj->soft_del) + return; - /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */ - if (obj->myDev->isYaffs2) { - unlinkOp = (newDir == obj->myDev->unlinkedDir); + if (obj->n_data_chunks <= 0) { + /* Empty file with no duplicate object headers, + * just delete it immediately */ + yaffs_free_tnode(obj->my_dev, obj->variant.file_variant.top); + obj->variant.file_variant.top = NULL; + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: Deleting empty file %d", + obj->obj_id); + yaffs_generic_obj_del(obj); } else { - unlinkOp = (newDir == obj->myDev->unlinkedDir - && obj->variantType == YAFFS_OBJECT_TYPE_FILE); + yaffs_soft_del_worker(obj, + obj->variant.file_variant.top, + obj->variant. + file_variant.top_level, 0); + obj->soft_del = 1; } +} - deleteOp = (newDir == obj->myDev->deletedDir); +/* Pruning removes any part of the file structure tree that is beyond the + * 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 + * level 0 tnode entries must be zeroed out. + * Could also use this for file deletion, but that's probably better handled + * by a special case. + * + * This function is recursive. For levels > 0 the function is called again on + * any sub-tree. For level == 0 we just check if the sub-tree has data. + * If there is no data in a subtree then it is pruned. + */ - existingTarget = yaffs_FindObjectByName(newDir, newName); +static struct yaffs_tnode *yaffs_prune_worker(struct yaffs_dev *dev, + struct yaffs_tnode *tn, u32 level, + int del0) +{ + int i; + int has_data; - /* 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. - * else only proceed if the new name does not exist and if we're putting - * it into a directory. - */ - if ((unlinkOp || - deleteOp || - force || - (shadows > 0) || - !existingTarget) && - newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_SetObjectName(obj, newName); - obj->dirty = 1; + if (!tn) + return tn; - yaffs_AddObjectToDirectory(newDir, obj); + has_data = 0; - if (unlinkOp) - obj->unlinked = 1; + if (level > 0) { + for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { + if (tn->internal[i]) { + tn->internal[i] = + yaffs_prune_worker(dev, + tn->internal[i], + level - 1, + (i == 0) ? del0 : 1); + } - /* If it is a deletion then we mark it as a shrink for gc purposes. */ - if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows)>= 0) - return YAFFS_OK; + if (tn->internal[i]) + has_data++; + } + } else { + int tnode_size_u32 = dev->tnode_size / sizeof(u32); + u32 *map = (u32 *) tn; + + for (i = 0; !has_data && i < tnode_size_u32; i++) { + if (map[i]) + has_data++; + } } - return YAFFS_FAIL; + if (has_data == 0 && del0) { + /* Free and return NULL */ + yaffs_free_tnode(dev, tn); + tn = NULL; + } + return tn; } -int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName, - yaffs_Object * newDir, const YCHAR * newName) +static int yaffs_prune_tree(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct) { - yaffs_Object *obj; - yaffs_Object *existingTarget; - int force = 0; + int i; + int has_data; + int done = 0; + struct yaffs_tnode *tn; -#ifdef CONFIG_YAFFS_CASE_INSENSITIVE - /* Special case for case insemsitive systems (eg. 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 && yaffs_strcmp(oldName, newName) == 0) { - force = 1; - } -#endif + if (file_struct->top_level < 1) + return YAFFS_OK; - obj = yaffs_FindObjectByName(oldDir, oldName); - /* Check new name to long. */ - if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK && - yaffs_strlen(newName) > YAFFS_MAX_ALIAS_LENGTH) - /* ENAMETOOLONG */ - return YAFFS_FAIL; - else if (obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK && - yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH) - /* ENAMETOOLONG */ - return YAFFS_FAIL; + file_struct->top = + yaffs_prune_worker(dev, file_struct->top, file_struct->top_level, 0); - if (obj && obj->renameAllowed) { + /* Now we have a tree with all the non-zero branches NULL but + * the height is the same as it was. + * Let's see if we can trim internal tnodes to shorten the tree. + * We can do this if only the 0th element in the tnode is in use + * (ie all the non-zero are NULL) + */ - /* Now do the handling for an existing target, if there is one */ + while (file_struct->top_level && !done) { + tn = file_struct->top; - existingTarget = yaffs_FindObjectByName(newDir, newName); - if (existingTarget && - existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY && - !list_empty(&existingTarget->variant.directoryVariant.children)) { - /* There is a target that is a non-empty directory, so we fail */ - return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */ - } else if (existingTarget && existingTarget != obj) { - /* Nuke the target first, using shadowing, - * but only if it isn't the same object - */ - yaffs_ChangeObjectName(obj, newDir, newName, force, - existingTarget->objectId); - yaffs_UnlinkObject(existingTarget); + has_data = 0; + for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { + if (tn->internal[i]) + has_data++; } - return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0); + if (!has_data) { + file_struct->top = tn->internal[0]; + file_struct->top_level--; + yaffs_free_tnode(dev, tn); + } else { + done = 1; + } } - return YAFFS_FAIL; + + return YAFFS_OK; } -/*------------------------- Block Management and Page Allocation ----------------*/ +/*-------------------- End of File Structure functions.-------------------*/ -static int yaffs_InitialiseBlocks(yaffs_Device * dev) +/* alloc_empty_obj gets us a clean Object.*/ +static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev) { - int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; + struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev); - dev->blockInfo = NULL; - dev->chunkBits = NULL; + if (!obj) + return obj; - dev->allocationBlock = -1; /* force it to get a new one */ + dev->n_obj++; - /* If the first allocation strategy fails, thry the alternate one */ - dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo)); - if(!dev->blockInfo){ - dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo)); - dev->blockInfoAlt = 1; - } - else - dev->blockInfoAlt = 0; + /* Now sweeten it up... */ - if(dev->blockInfo){ + memset(obj, 0, sizeof(struct yaffs_obj)); + obj->being_created = 1; - /* Set up dynamic blockinfo stuff. */ - dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */ - dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks); - if(!dev->chunkBits){ - dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks); - dev->chunkBitsAlt = 1; - } - else - dev->chunkBitsAlt = 0; - } + obj->my_dev = dev; + obj->hdr_chunk = 0; + obj->variant_type = YAFFS_OBJECT_TYPE_UNKNOWN; + INIT_LIST_HEAD(&(obj->hard_links)); + INIT_LIST_HEAD(&(obj->hash_link)); + INIT_LIST_HEAD(&obj->siblings); - if (dev->blockInfo && dev->chunkBits) { - memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo)); - memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks); - return YAFFS_OK; + /* Now make the directory sane */ + if (dev->root_dir) { + obj->parent = dev->root_dir; + list_add(&(obj->siblings), + &dev->root_dir->variant.dir_variant.children); } - return YAFFS_FAIL; - -} - -static void yaffs_DeinitialiseBlocks(yaffs_Device * dev) -{ - if(dev->blockInfoAlt && dev->blockInfo) - YFREE_ALT(dev->blockInfo); - else if(dev->blockInfo) - YFREE(dev->blockInfo); + /* Add it to the lost and found directory. + * NB Can't put root or lost-n-found in lost-n-found so + * check if lost-n-found exists first + */ + if (dev->lost_n_found) + yaffs_add_obj_to_dir(dev->lost_n_found, obj); - dev->blockInfoAlt = 0; + obj->being_created = 0; - dev->blockInfo = NULL; + dev->checkpoint_blocks_required = 0; /* force recalculation */ - if(dev->chunkBitsAlt && dev->chunkBits) - YFREE_ALT(dev->chunkBits); - else if(dev->chunkBits) - YFREE(dev->chunkBits); - dev->chunkBitsAlt = 0; - dev->chunkBits = NULL; + return obj; } -static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device * dev, - yaffs_BlockInfo * bi) +static int yaffs_find_nice_bucket(struct yaffs_dev *dev) { int i; - __u32 seq; - yaffs_BlockInfo *b; - - if (!dev->isYaffs2) - return 1; /* disqualification only applies to yaffs2. */ - - if (!bi->hasShrinkHeader) - return 1; /* can gc */ + int l = 999; + int lowest = 999999; - /* Find the oldest dirty sequence number if we don't know it and save it - * so we don't have to keep recomputing it. + /* Search for the shortest list or one that + * isn't too long. */ - if (!dev->oldestDirtySequence) { - seq = dev->sequenceNumber; - for (i = dev->internalStartBlock; i <= dev->internalEndBlock; - i++) { - b = yaffs_GetBlockInfo(dev, i); - if (b->blockState == YAFFS_BLOCK_STATE_FULL && - (b->pagesInUse - b->softDeletions) < - dev->nChunksPerBlock && b->sequenceNumber < seq) { - seq = b->sequenceNumber; - } + for (i = 0; i < 10 && lowest > 4; i++) { + dev->bucket_finder++; + dev->bucket_finder %= YAFFS_NOBJECT_BUCKETS; + if (dev->obj_bucket[dev->bucket_finder].count < lowest) { + lowest = dev->obj_bucket[dev->bucket_finder].count; + l = dev->bucket_finder; } - dev->oldestDirtySequence = seq; } - /* Can't do gc of this block if there are any blocks older than this one that have - * discarded pages. - */ - return (bi->sequenceNumber <= dev->oldestDirtySequence); - + return l; } -/* FindDiretiestBlock is used to select the dirtiest block (or close enough) - * for garbage collection. - */ - -static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev, - int aggressive) +static int yaffs_new_obj_id(struct yaffs_dev *dev) { + int bucket = yaffs_find_nice_bucket(dev); + int found = 0; + struct list_head *i; + u32 n = (u32) bucket; - int b = dev->currentDirtyChecker; - - int i; - int iterations; - int dirtiest = -1; - int pagesInUse = 0; - int prioritised=0; - yaffs_BlockInfo *bi; - int pendingPrioritisedExist = 0; - - /* First let's see if we need to grab a prioritised block */ - if(dev->hasPendingPrioritisedGCs){ - for(i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++){ - - bi = yaffs_GetBlockInfo(dev, i); - //yaffs_VerifyBlock(dev,bi,i); + /* Now find an object value that has not already been taken + * by scanning the list. + */ - if(bi->gcPrioritise) { - pendingPrioritisedExist = 1; - if(bi->blockState == YAFFS_BLOCK_STATE_FULL && - yaffs_BlockNotDisqualifiedFromGC(dev, bi)){ - pagesInUse = (bi->pagesInUse - bi->softDeletions); - dirtiest = i; - prioritised = 1; - aggressive = 1; /* Fool the non-aggressive skip logiv below */ + while (!found) { + found = 1; + n += YAFFS_NOBJECT_BUCKETS; + if (1 || dev->obj_bucket[bucket].count > 0) { + list_for_each(i, &dev->obj_bucket[bucket].list) { + /* If there is already one in the list */ + if (i && list_entry(i, struct yaffs_obj, + hash_link)->obj_id == n) { + found = 0; } } } - - if(!pendingPrioritisedExist) /* None found, so we can clear this */ - dev->hasPendingPrioritisedGCs = 0; } + return n; +} - /* If we're doing aggressive GC then we are happy to take a less-dirty block, and - * search harder. - * else (we're doing a leasurely gc), then we only bother to do this if the - * block has only a few pages in use. - */ - - dev->nonAggressiveSkip--; - - if (!aggressive && (dev->nonAggressiveSkip > 0)) { - return -1; - } - - if(!prioritised) - pagesInUse = - (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1; - - if (aggressive) { - iterations = - dev->internalEndBlock - dev->internalStartBlock + 1; - } else { - iterations = - dev->internalEndBlock - dev->internalStartBlock + 1; - iterations = iterations / 16; - if (iterations > 200) { - iterations = 200; - } - } - - for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) { - b++; - if (b < dev->internalStartBlock || b > dev->internalEndBlock) { - b = dev->internalStartBlock; - } - - if (b < dev->internalStartBlock || b > dev->internalEndBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> Block %d is not valid" TENDSTR), b)); - YBUG(); - } +static void yaffs_hash_obj(struct yaffs_obj *in) +{ + int bucket = yaffs_hash_fn(in->obj_id); + struct yaffs_dev *dev = in->my_dev; - bi = yaffs_GetBlockInfo(dev, b); + list_add(&in->hash_link, &dev->obj_bucket[bucket].list); + dev->obj_bucket[bucket].count++; +} -#if 0 - if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) { - dirtiest = b; - pagesInUse = 0; - } - else -#endif +struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number) +{ + int bucket = yaffs_hash_fn(number); + struct list_head *i; + struct yaffs_obj *in; - if (bi->blockState == YAFFS_BLOCK_STATE_FULL && - (bi->pagesInUse - bi->softDeletions) < pagesInUse && - yaffs_BlockNotDisqualifiedFromGC(dev, bi)) { - dirtiest = b; - pagesInUse = (bi->pagesInUse - bi->softDeletions); + list_for_each(i, &dev->obj_bucket[bucket].list) { + /* Look if it is in the list */ + in = list_entry(i, struct yaffs_obj, hash_link); + if (in->obj_id == number) { + /* Don't show if it is defered free */ + if (in->defered_free) + return NULL; + return in; } } - dev->currentDirtyChecker = b; - - if (dirtiest > 0) { - T(YAFFS_TRACE_GC, - (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest, - dev->nChunksPerBlock - pagesInUse,prioritised)); - } - - dev->oldestDirtySequence = 0; - - if (dirtiest > 0) { - dev->nonAggressiveSkip = 4; - } - - return dirtiest; + return NULL; } -static void yaffs_BlockBecameDirty(yaffs_Device * dev, int blockNo) +struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number, + enum yaffs_obj_type type) { - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo); - - 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. - */ - - T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, - (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR), - blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : "")); + struct yaffs_obj *the_obj = NULL; + struct yaffs_tnode *tn = NULL; - bi->blockState = YAFFS_BLOCK_STATE_DIRTY; + if (number < 0) + number = yaffs_new_obj_id(dev); - if (!bi->needsRetiring) { - yaffs_InvalidateCheckpoint(dev); - erasedOk = yaffs_EraseBlockInNAND(dev, blockNo); - if (!erasedOk) { - dev->nErasureFailures++; - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>> Erasure failed %d" TENDSTR), blockNo)); - } + if (type == YAFFS_OBJECT_TYPE_FILE) { + tn = yaffs_get_tnode(dev); + if (!tn) + return NULL; } - if (erasedOk && - ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) { - int i; - for (i = 0; i < dev->nChunksPerBlock; i++) { - if (!yaffs_CheckChunkErased - (dev, blockNo * dev->nChunksPerBlock + i)) { - T(YAFFS_TRACE_ERROR, - (TSTR - (">>Block %d erasure supposedly OK, but chunk %d not erased" - TENDSTR), blockNo, i)); - } - } + the_obj = yaffs_alloc_empty_obj(dev); + if (!the_obj) { + if (tn) + yaffs_free_tnode(dev, tn); + return NULL; } - if (erasedOk) { - /* Clean it up... */ - bi->blockState = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - bi->pagesInUse = 0; - bi->softDeletions = 0; - bi->hasShrinkHeader = 0; - bi->skipErasedCheck = 1; /* This is clean, so no need to check */ - bi->gcPrioritise = 0; - yaffs_ClearChunkBits(dev, blockNo); - - T(YAFFS_TRACE_ERASE, - (TSTR("Erased block %d" TENDSTR), blockNo)); - } else { - dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */ + the_obj->fake = 0; + the_obj->rename_allowed = 1; + the_obj->unlink_allowed = 1; + the_obj->obj_id = number; + yaffs_hash_obj(the_obj); + the_obj->variant_type = type; + yaffs_load_current_time(the_obj, 1, 1); - yaffs_RetireBlock(dev, blockNo); - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>> Block %d retired" TENDSTR), blockNo)); + switch (type) { + case YAFFS_OBJECT_TYPE_FILE: + the_obj->variant.file_variant.file_size = 0; + the_obj->variant.file_variant.scanned_size = 0; + the_obj->variant.file_variant.shrink_size = + yaffs_max_file_size(dev); + the_obj->variant.file_variant.top_level = 0; + the_obj->variant.file_variant.top = tn; + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + INIT_LIST_HEAD(&the_obj->variant.dir_variant.children); + INIT_LIST_HEAD(&the_obj->variant.dir_variant.dirty); + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + case YAFFS_OBJECT_TYPE_HARDLINK: + case YAFFS_OBJECT_TYPE_SPECIAL: + /* No action required */ + break; + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* todo this should not happen */ + break; } + return the_obj; } -static int yaffs_FindBlockForAllocation(yaffs_Device * dev) +static struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev, + int number, u32 mode) { - 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 tragedy: no more eraased blocks" TENDSTR))); - - return -1; - } - /* Find an empty block. */ - - for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { - dev->allocationBlockFinder++; - if (dev->allocationBlockFinder < dev->internalStartBlock - || dev->allocationBlockFinder > dev->internalEndBlock) { - dev->allocationBlockFinder = dev->internalStartBlock; - } + struct yaffs_obj *obj = + yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); - bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder); - - if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) { - bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING; - dev->sequenceNumber++; - bi->sequenceNumber = dev->sequenceNumber; - dev->nErasedBlocks--; - T(YAFFS_TRACE_ALLOCATE, - (TSTR("Allocated block %d, seq %d, %d left" TENDSTR), - dev->allocationBlockFinder, dev->sequenceNumber, - dev->nErasedBlocks)); - return dev->allocationBlockFinder; - } - } + if (!obj) + return NULL; - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs tragedy: no more eraased blocks, but there should have been %d" - TENDSTR), dev->nErasedBlocks)); + obj->fake = 1; /* it is fake so it might not use NAND */ + obj->rename_allowed = 0; + obj->unlink_allowed = 0; + obj->deleted = 0; + obj->unlinked = 0; + obj->yst_mode = mode; + obj->my_dev = dev; + obj->hdr_chunk = 0; /* Not a valid chunk. */ + return obj; - return -1; } -// Check if there's space to allocate... -// Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()? -static int yaffs_CheckSpaceForAllocation(yaffs_Device * dev) +static void yaffs_init_tnodes_and_objs(struct yaffs_dev *dev) { - int reservedChunks; - int reservedBlocks = dev->nReservedBlocks; - int checkpointBlocks; - - checkpointBlocks = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint; - if(checkpointBlocks < 0) - checkpointBlocks = 0; + int i; - reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock); + dev->n_obj = 0; + dev->n_tnodes = 0; + yaffs_init_raw_tnodes_and_objs(dev); - return (dev->nFreeChunks > reservedChunks); + for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { + INIT_LIST_HEAD(&dev->obj_bucket[i].list); + dev->obj_bucket[i].count = 0; + } } -static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr) +struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev, + int number, + enum yaffs_obj_type type) { - int retVal; - yaffs_BlockInfo *bi; + struct yaffs_obj *the_obj = NULL; - if (dev->allocationBlock < 0) { - /* Get next block to allocate off */ - dev->allocationBlock = yaffs_FindBlockForAllocation(dev); - dev->allocationPage = 0; - } + if (number > 0) + the_obj = yaffs_find_by_number(dev, number); - if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) { - /* Not enough space to allocate unless we're allowed to use the reserve. */ - return -1; - } - - if (dev->nErasedBlocks < dev->nReservedBlocks - && dev->allocationPage == 0) { - T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR))); - } - - /* Next page please.... */ - if (dev->allocationBlock >= 0) { - bi = yaffs_GetBlockInfo(dev, dev->allocationBlock); - - retVal = (dev->allocationBlock * dev->nChunksPerBlock) + - dev->allocationPage; - bi->pagesInUse++; - yaffs_SetChunkBit(dev, dev->allocationBlock, - dev->allocationPage); + if (!the_obj) + the_obj = yaffs_new_obj(dev, number, type); - dev->allocationPage++; + return the_obj; - dev->nFreeChunks--; - - /* If the block is full set the state to full */ - if (dev->allocationPage >= dev->nChunksPerBlock) { - bi->blockState = YAFFS_BLOCK_STATE_FULL; - dev->allocationBlock = -1; - } - - if(blockUsedPtr) - *blockUsedPtr = bi; - - return retVal; - } - - T(YAFFS_TRACE_ERROR, - (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR))); - - return -1; } -static int yaffs_GetErasedChunks(yaffs_Device * dev) +YCHAR *yaffs_clone_str(const YCHAR *str) { - int n; + YCHAR *new_str = NULL; + int len; - n = dev->nErasedBlocks * dev->nChunksPerBlock; + if (!str) + str = _Y(""); - if (dev->allocationBlock > 0) { - n += (dev->nChunksPerBlock - dev->allocationPage); + len = yaffs_strnlen(str, YAFFS_MAX_ALIAS_LENGTH); + new_str = kmalloc((len + 1) * sizeof(YCHAR), GFP_NOFS); + if (new_str) { + yaffs_strncpy(new_str, str, len); + new_str[len] = 0; } - - return n; + return new_str; } +/* + *yaffs_update_parent() handles fixing a directories mtime and ctime when a new + * link (ie. name) is created or deleted in the directory. + * + * ie. + * create dir/a : update dir's mtime/ctime + * rm dir/a: update dir's mtime/ctime + * modify dir/a: don't update dir's mtimme/ctime + * + * This can be handled immediately or defered. Defering helps reduce the number + * of updates when many files in a directory are changed within a brief period. + * + * If the directory updating is defered then yaffs_update_dirty_dirs must be + * called periodically. + */ -static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) +static void yaffs_update_parent(struct yaffs_obj *obj) { - int oldChunk; - int newChunk; - int chunkInBlock; - int markNAND; - int retVal = YAFFS_OK; - int cleanups = 0; - int i; - int isCheckpointBlock; - int matchingChunk; - - int chunksBefore = yaffs_GetErasedChunks(dev); - int chunksAfter; - - yaffs_ExtendedTags tags; + struct yaffs_dev *dev; - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block); - - yaffs_Object *object; - - isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT); - - bi->blockState = YAFFS_BLOCK_STATE_COLLECTING; - - T(YAFFS_TRACE_TRACING, - (TSTR("Collecting block %d, in use %d, shrink %d, " TENDSTR), block, - bi->pagesInUse, bi->hasShrinkHeader)); - - /*yaffs_VerifyFreeChunks(dev); */ - - bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */ - - /* Take off the number of soft deleted entries because - * they're going to get really deleted during GC. - */ - dev->nFreeChunks -= bi->softDeletions; + if (!obj) + return; + dev = obj->my_dev; + obj->dirty = 1; + yaffs_load_current_time(obj, 0, 1); + if (dev->param.defered_dir_update) { + struct list_head *link = &obj->variant.dir_variant.dirty; - dev->isDoingGC = 1; + if (list_empty(link)) { + list_add(link, &dev->dirty_dirs); + yaffs_trace(YAFFS_TRACE_BACKGROUND, + "Added object %d to dirty directories", + obj->obj_id); + } - if (isCheckpointBlock || - !yaffs_StillSomeChunkBits(dev, block)) { - T(YAFFS_TRACE_TRACING, - (TSTR - ("Collecting block %d that has no chunks in use" TENDSTR), - block)); - yaffs_BlockBecameDirty(dev, block); } else { + yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); + } +} - __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__); - - yaffs_VerifyBlock(dev,bi,block); - - for (chunkInBlock = 0, oldChunk = block * dev->nChunksPerBlock; - chunkInBlock < dev->nChunksPerBlock - && yaffs_StillSomeChunkBits(dev, block); - chunkInBlock++, oldChunk++) { - if (yaffs_CheckChunkBit(dev, block, chunkInBlock)) { - - /* This page is in use and might need to be copied off */ - - markNAND = 1; - - yaffs_InitialiseTags(&tags); - - yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk, - buffer, &tags); - - object = - yaffs_FindObjectByNumber(dev, - tags.objectId); - - T(YAFFS_TRACE_GC_DETAIL, - (TSTR - ("Collecting page %d, %d %d %d " TENDSTR), - chunkInBlock, tags.objectId, tags.chunkId, - tags.byteCount)); - - if(object && !yaffs_SkipVerification(dev)){ - if(tags.chunkId == 0) - matchingChunk = object->chunkId; - else if(object->softDeleted) - matchingChunk = oldChunk; /* Defeat the test */ - else - matchingChunk = yaffs_FindChunkInFile(object,tags.chunkId,NULL); - - if(oldChunk != matchingChunk) - T(YAFFS_TRACE_ERROR, - (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR), - oldChunk,matchingChunk,tags.objectId, tags.chunkId)); +void yaffs_update_dirty_dirs(struct yaffs_dev *dev) +{ + struct list_head *link; + struct yaffs_obj *obj; + struct yaffs_dir_var *d_s; + union yaffs_obj_var *o_v; - } + yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update dirty directories"); - if (!object) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("page %d in gc has no object: %d %d %d " - TENDSTR), oldChunk, - tags.objectId, tags.chunkId, tags.byteCount)); - } + while (!list_empty(&dev->dirty_dirs)) { + link = dev->dirty_dirs.next; + list_del_init(link); - if (object && object->deleted - && tags.chunkId != 0) { - /* Data chunk in a deleted file, throw it away - * It's a soft deleted data chunk, - * No need to copy this, just forget about it and - * fix up the object. - */ + d_s = list_entry(link, struct yaffs_dir_var, dirty); + o_v = list_entry(d_s, union yaffs_obj_var, dir_variant); + obj = list_entry(o_v, struct yaffs_obj, variant); - object->nDataChunks--; + yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update directory %d", + obj->obj_id); - if (object->nDataChunks <= 0) { - /* remeber to clean up the object */ - dev->gcCleanupList[cleanups] = - tags.objectId; - cleanups++; - } - markNAND = 0; - } else if (0 - /* Todo object && object->deleted && object->nDataChunks == 0 */ - ) { - /* Deleted object header with no data chunks. - * Can be discarded and the file deleted. - */ - object->chunkId = 0; - yaffs_FreeTnode(object->myDev, - object->variant. - fileVariant.top); - object->variant.fileVariant.top = NULL; - yaffs_DoGenericObjectDeletion(object); + if (obj->dirty) + yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); + } +} - } 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++; +/* + * Mknod (create) a new object. + * equiv_obj only has meaning for a hard link; + * alias_str only has meaning for a symlink. + * rdev only has meaning for devices (a subset of special objects) + */ - dev->nGCCopies++; +static struct yaffs_obj *yaffs_create_obj(enum yaffs_obj_type type, + struct yaffs_obj *parent, + const YCHAR *name, + u32 mode, + u32 uid, + u32 gid, + struct yaffs_obj *equiv_obj, + const YCHAR *alias_str, u32 rdev) +{ + struct yaffs_obj *in; + YCHAR *str = NULL; + struct yaffs_dev *dev = parent->my_dev; - if (tags.chunkId == 0) { - /* It is an object Id, - * We need to nuke the shrinkheader flags first - * We no longer want the shrinkHeader flag since its work is done - * and if it is left in place it will mess up scanning. - * Also, clear out any shadowing stuff - */ + /* Check if the entry exists. + * If it does then fail the call since we don't want a dup. */ + if (yaffs_find_by_name(parent, name)) + return NULL; - yaffs_ObjectHeader *oh; - oh = (yaffs_ObjectHeader *)buffer; - oh->isShrink = 0; - oh->shadowsObject = -1; - tags.extraShadows = 0; - tags.extraIsShrinkHeader = 0; + if (type == YAFFS_OBJECT_TYPE_SYMLINK) { + str = yaffs_clone_str(alias_str); + if (!str) + return NULL; + } - yaffs_VerifyObjectHeader(object,oh,&tags,1); - } + in = yaffs_new_obj(dev, -1, type); - newChunk = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1); + if (!in) { + kfree(str); + return NULL; + } - if (newChunk < 0) { - retVal = YAFFS_FAIL; - } else { + in->hdr_chunk = 0; + in->valid = 1; + in->variant_type = type; - /* Ok, now fix up the Tnodes etc. */ + in->yst_mode = mode; - if (tags.chunkId == 0) { - /* It's a header */ - object->chunkId = newChunk; - object->serial = tags.serialNumber; - } else { - /* It's a data chunk */ - yaffs_PutChunkIntoFile - (object, - tags.chunkId, - newChunk, 0); - } - } - } + yaffs_attribs_init(in, gid, uid, rdev); - yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__); + in->n_data_chunks = 0; - } - } + yaffs_set_obj_name(in, name); + in->dirty = 1; - yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); + yaffs_add_obj_to_dir(parent, in); + in->my_dev = parent->my_dev; - /* Do any required cleanups */ - for (i = 0; i < cleanups; i++) { - /* Time to delete the file too */ - object = - yaffs_FindObjectByNumber(dev, - dev->gcCleanupList[i]); - if (object) { - yaffs_FreeTnode(dev, - object->variant.fileVariant. - top); - object->variant.fileVariant.top = NULL; - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: About to finally delete object %d" - TENDSTR), object->objectId)); - yaffs_DoGenericObjectDeletion(object); - object->myDev->nDeletedFiles--; - } - - } - + switch (type) { + case YAFFS_OBJECT_TYPE_SYMLINK: + in->variant.symlink_variant.alias = str; + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + in->variant.hardlink_variant.equiv_obj = equiv_obj; + in->variant.hardlink_variant.equiv_id = equiv_obj->obj_id; + list_add(&in->hard_links, &equiv_obj->hard_links); + break; + case YAFFS_OBJECT_TYPE_FILE: + case YAFFS_OBJECT_TYPE_DIRECTORY: + case YAFFS_OBJECT_TYPE_SPECIAL: + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* do nothing */ + break; } - yaffs_VerifyCollectedBlock(dev,bi,block); - - if (chunksBefore >= (chunksAfter = yaffs_GetErasedChunks(dev))) { - T(YAFFS_TRACE_GC, - (TSTR - ("gc did not increase free chunks before %d after %d" - TENDSTR), chunksBefore, chunksAfter)); + if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) { + /* Could not create the object header, fail */ + yaffs_del_obj(in); + in = NULL; } - dev->isDoingGC = 0; + if (in) + yaffs_update_parent(parent); - return retVal; + return in; } -/* New garbage collector - * If we're very low on erased blocks then we do aggressive garbage collection - * otherwise we do "leasurely" garbage collection. - * Aggressive gc looks further (whole array) and will accept less dirty blocks. - * Passive gc only inspects smaller areas and will only accept more dirty blocks. - * - * The idea is to help clear out space in a more spread-out manner. - * Dunno if it really does anything useful. - */ -static int yaffs_CheckGarbageCollection(yaffs_Device * dev) +struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent, + const YCHAR *name, u32 mode, u32 uid, + u32 gid) { - int block; - int aggressive; - int gcOk = YAFFS_OK; - int maxTries = 0; - - int checkpointBlockAdjust; - - if (dev->isDoingGC) { - /* Bail out so we don't get recursive gc */ - return YAFFS_OK; - } - - /* This loop should pass the first time. - * We'll only see looping here if the erase of the collected block fails. - */ - - do { - maxTries++; - - checkpointBlockAdjust = (dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint); - if(checkpointBlockAdjust < 0) - checkpointBlockAdjust = 0; + return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode, + uid, gid, NULL, NULL, 0); +} - if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) { - /* We need a block soon...*/ - aggressive = 1; - } else { - /* We're in no hurry */ - aggressive = 0; - } +struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name, + u32 mode, u32 uid, u32 gid) +{ + return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name, + mode, uid, gid, NULL, NULL, 0); +} - block = yaffs_FindBlockForGarbageCollection(dev, aggressive); +struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent, + const YCHAR *name, u32 mode, u32 uid, + u32 gid, u32 rdev) +{ + return yaffs_create_obj(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode, + uid, gid, NULL, NULL, rdev); +} - if (block > 0) { - dev->garbageCollections++; - if (!aggressive) { - dev->passiveGarbageCollections++; - } +struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent, + const YCHAR *name, u32 mode, u32 uid, + u32 gid, const YCHAR *alias) +{ + return yaffs_create_obj(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode, + uid, gid, NULL, alias, 0); +} - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR), - dev->nErasedBlocks, aggressive)); +/* yaffs_link_obj returns the object id of the equivalent object.*/ +struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name, + struct yaffs_obj *equiv_obj) +{ + /* Get the real object in case we were fed a hard link obj */ + equiv_obj = yaffs_get_equivalent_obj(equiv_obj); - gcOk = yaffs_GarbageCollectBlock(dev, block); - } + if (yaffs_create_obj(YAFFS_OBJECT_TYPE_HARDLINK, + parent, name, 0, 0, 0, + equiv_obj, NULL, 0)) + return equiv_obj; - if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) { - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d" - TENDSTR), dev->nErasedBlocks, maxTries, block)); - } - } while ((dev->nErasedBlocks < dev->nReservedBlocks) && (block > 0) - && (maxTries < 2)); + return NULL; - return aggressive ? gcOk : YAFFS_OK; } -/*------------------------- TAGS --------------------------------*/ -static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId, - int chunkInObject) -{ - return (tags->chunkId == chunkInObject && - tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0; - -} +/*---------------------- Block Management and Page Allocation -------------*/ -/*-------------------- Data file manipulation -----------------*/ - -static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode, - yaffs_ExtendedTags * tags) +static void yaffs_deinit_blocks(struct yaffs_dev *dev) { - /*Get the Tnode, then get the level 0 offset chunk offset */ - yaffs_Tnode *tn; - int theChunk = -1; - yaffs_ExtendedTags localTags; - int retVal = -1; - - yaffs_Device *dev = in->myDev; - - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &localTags; - } + if (dev->block_info_alt && dev->block_info) + vfree(dev->block_info); + else + kfree(dev->block_info); - tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode); + dev->block_info_alt = 0; - if (tn) { - theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); + dev->block_info = NULL; - retVal = - yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId, - chunkInInode); - } - return retVal; + if (dev->chunk_bits_alt && dev->chunk_bits) + vfree(dev->chunk_bits); + else + kfree(dev->chunk_bits); + dev->chunk_bits_alt = 0; + dev->chunk_bits = NULL; } -static int yaffs_FindAndDeleteChunkInFile(yaffs_Object * in, int chunkInInode, - yaffs_ExtendedTags * tags) +static int yaffs_init_blocks(struct yaffs_dev *dev) { - /* Get the Tnode, then get the level 0 offset chunk offset */ - yaffs_Tnode *tn; - int theChunk = -1; - yaffs_ExtendedTags localTags; + int n_blocks = dev->internal_end_block - dev->internal_start_block + 1; - yaffs_Device *dev = in->myDev; - int retVal = -1; + dev->block_info = NULL; + dev->chunk_bits = NULL; + dev->alloc_block = -1; /* force it to get a new one */ - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &localTags; + /* If the first allocation strategy fails, thry the alternate one */ + dev->block_info = + kmalloc(n_blocks * sizeof(struct yaffs_block_info), GFP_NOFS); + if (!dev->block_info) { + dev->block_info = + vmalloc(n_blocks * sizeof(struct yaffs_block_info)); + dev->block_info_alt = 1; + } else { + dev->block_info_alt = 0; } - tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode); - - if (tn) { - - theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); - - retVal = - yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId, - chunkInInode); + if (!dev->block_info) + goto alloc_error; - /* Delete the entry in the filestructure (if found) */ - if (retVal != -1) { - yaffs_PutLevel0Tnode(dev,tn,chunkInInode,0); - } + /* Set up dynamic blockinfo stuff. Round up bytes. */ + dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8; + dev->chunk_bits = + kmalloc(dev->chunk_bit_stride * n_blocks, GFP_NOFS); + if (!dev->chunk_bits) { + dev->chunk_bits = + vmalloc(dev->chunk_bit_stride * n_blocks); + dev->chunk_bits_alt = 1; } else { - /*T(("No level 0 found for %d\n", chunkInInode)); */ + dev->chunk_bits_alt = 0; } + if (!dev->chunk_bits) + goto alloc_error; - if (retVal == -1) { - /* T(("Could not find %d to delete\n",chunkInInode)); */ - } - return retVal; + + memset(dev->block_info, 0, n_blocks * sizeof(struct yaffs_block_info)); + memset(dev->chunk_bits, 0, dev->chunk_bit_stride * n_blocks); + return YAFFS_OK; + +alloc_error: + yaffs_deinit_blocks(dev); + return YAFFS_FAIL; } -#ifdef YAFFS_PARANOID -static int yaffs_CheckFileSanity(yaffs_Object * in) +void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no) { - int chunk; - int nChunks; - int fSize; - int failed = 0; - int objId; - yaffs_Tnode *tn; - yaffs_Tags localTags; - yaffs_Tags *tags = &localTags; - int theChunk; - int chunkDeleted; - - if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { - /* T(("Object not a file\n")); */ - return YAFFS_FAIL; - } + struct yaffs_block_info *bi = yaffs_get_block_info(dev, block_no); + int erased_ok = 0; + int i; - objId = in->objectId; - fSize = in->variant.fileVariant.fileSize; - nChunks = - (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk; + /* If the block is still healthy erase it and mark as clean. + * If the block has had a data failure, then retire it. + */ - for (chunk = 1; chunk <= nChunks; chunk++) { - tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant, - chunk); + yaffs_trace(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, + "yaffs_block_became_dirty block %d state %d %s", + block_no, bi->block_state, + (bi->needs_retiring) ? "needs retiring" : ""); - if (tn) { + yaffs2_clear_oldest_dirty_seq(dev, bi); - theChunk = yaffs_GetChunkGroupBase(dev,tn,chunk); + bi->block_state = YAFFS_BLOCK_STATE_DIRTY; - if (yaffs_CheckChunkBits - (dev, theChunk / dev->nChunksPerBlock, - theChunk % dev->nChunksPerBlock)) { + /* If this is the block being garbage collected then stop gc'ing */ + if (block_no == dev->gc_block) + dev->gc_block = 0; - yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk, - tags, - &chunkDeleted); - if (yaffs_TagsMatch - (tags, in->objectId, chunk, chunkDeleted)) { - /* found it; */ + /* If this block is currently the best candidate for gc + * then drop as a candidate */ + if (block_no == dev->gc_dirtiest) { + dev->gc_dirtiest = 0; + dev->gc_pages_in_use = 0; + } - } - } else { + if (!bi->needs_retiring) { + yaffs2_checkpt_invalidate(dev); + erased_ok = yaffs_erase_block(dev, block_no); + if (!erased_ok) { + dev->n_erase_failures++; + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>> Erasure failed %d", block_no); + } + } - failed = 1; + /* Verify erasure if needed */ + if (erased_ok && + ((yaffs_trace_mask & YAFFS_TRACE_ERASE) || + !yaffs_skip_verification(dev))) { + for (i = 0; i < dev->param.chunks_per_block; i++) { + if (!yaffs_check_chunk_erased(dev, + block_no * dev->param.chunks_per_block + i)) { + yaffs_trace(YAFFS_TRACE_ERROR, + ">>Block %d erasure supposedly OK, but chunk %d not erased", + block_no, i); } - - } else { - /* T(("No level 0 found for %d\n", chunk)); */ } } - return failed ? YAFFS_FAIL : YAFFS_OK; -} + if (!erased_ok) { + /* We lost a block of free space */ + dev->n_free_chunks -= dev->param.chunks_per_block; + yaffs_retire_block(dev, block_no); + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>> Block %d retired", block_no); + return; + } -#endif + /* Clean it up... */ + bi->block_state = YAFFS_BLOCK_STATE_EMPTY; + bi->seq_number = 0; + dev->n_erased_blocks++; + bi->pages_in_use = 0; + bi->soft_del_pages = 0; + bi->has_shrink_hdr = 0; + bi->skip_erased_check = 1; /* Clean, so no need to check */ + bi->gc_prioritise = 0; + bi->has_summary = 0; + + yaffs_clear_chunk_bits(dev, block_no); + + yaffs_trace(YAFFS_TRACE_ERASE, "Erased block %d", block_no); +} -static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode, - int chunkInNAND, int inScan) +static inline int yaffs_gc_process_chunk(struct yaffs_dev *dev, + struct yaffs_block_info *bi, + int old_chunk, u8 *buffer) { - /* NB inScan is zero unless scanning. - * For forward scanning, inScan is > 0; - * for backward scanning inScan is < 0 - */ + int new_chunk; + int mark_flash = 1; + struct yaffs_ext_tags tags; + struct yaffs_obj *object; + int matching_chunk; + int ret_val = YAFFS_OK; - yaffs_Tnode *tn; - yaffs_Device *dev = in->myDev; - int existingChunk; - yaffs_ExtendedTags existingTags; - yaffs_ExtendedTags newTags; - unsigned existingSerial, newSerial; + memset(&tags, 0, sizeof(tags)); + yaffs_rd_chunk_tags_nand(dev, old_chunk, + buffer, &tags); + object = yaffs_find_by_number(dev, tags.obj_id); - if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { - /* Just ignore an attempt at putting a chunk into a non-file during scanning - * If it is not during Scanning then something went wrong! - */ - if (!inScan) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy:attempt to put data chunk into a non-file" - TENDSTR))); - YBUG(); - } + yaffs_trace(YAFFS_TRACE_GC_DETAIL, + "Collecting chunk in block %d, %d %d %d ", + dev->gc_chunk, tags.obj_id, + tags.chunk_id, tags.n_bytes); - yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); - return YAFFS_OK; + if (object && !yaffs_skip_verification(dev)) { + if (tags.chunk_id == 0) + matching_chunk = + object->hdr_chunk; + else if (object->soft_del) + /* Defeat the test */ + matching_chunk = old_chunk; + else + matching_chunk = + yaffs_find_chunk_in_file + (object, tags.chunk_id, + NULL); + + if (old_chunk != matching_chunk) + yaffs_trace(YAFFS_TRACE_ERROR, + "gc: page in gc mismatch: %d %d %d %d", + old_chunk, + matching_chunk, + tags.obj_id, + tags.chunk_id); } - tn = yaffs_AddOrFindLevel0Tnode(dev, - &in->variant.fileVariant, - chunkInInode, - NULL); - if (!tn) { - return YAFFS_FAIL; + if (!object) { + yaffs_trace(YAFFS_TRACE_ERROR, + "page %d in gc has no object: %d %d %d ", + old_chunk, + tags.obj_id, tags.chunk_id, + tags.n_bytes); } - existingChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); + if (object && + object->deleted && + object->soft_del && tags.chunk_id != 0) { + /* Data chunk in a soft deleted file, + * throw it away. + * It's a soft deleted data chunk, + * No need to copy this, just forget + * about it and fix up the object. + */ - if (inScan != 0) { - /* If we're scanning then we need to test for duplicates - * NB This does not need to be efficient since it should only ever - * happen when the power fails during a write, then only one - * chunk should ever be affected. - * - * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO - * Update: For backward scanning we don't need to re-read tags so this is quite cheap. + /* Free chunks already includes + * softdeleted chunks, how ever this + * chunk is going to soon be really + * deleted which will increment free + * chunks. We have to decrement free + * chunks so this works out properly. */ + dev->n_free_chunks--; + bi->soft_del_pages--; - 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: - * - * Backwards scanning YAFFS2: The old one is what we use, dump the new one. - * Forward scanning YAFFS2: The new one is what we use, dump the old one. - * YAFFS1: Get both sets of tags and compare serial numbers. + object->n_data_chunks--; + if (object->n_data_chunks <= 0) { + /* remeber to clean up obj */ + dev->gc_cleanup_list[dev->n_clean_ups] = tags.obj_id; + dev->n_clean_ups++; + } + mark_flash = 0; + } 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.serial_number++; + dev->n_gc_copies++; + + if (tags.chunk_id == 0) { + /* It is an object Id, + * We need to nuke the + * shrinkheader flags since its + * work is done. + * Also need to clean up + * shadowing. */ + struct yaffs_obj_hdr *oh; + oh = (struct yaffs_obj_hdr *) buffer; - if (inScan > 0) { - /* Only do this for forward scanning */ - yaffs_ReadChunkWithTagsFromNAND(dev, - chunkInNAND, - NULL, &newTags); + oh->is_shrink = 0; + tags.extra_is_shrink = 0; + oh->shadows_obj = 0; + oh->inband_shadowed_obj_id = 0; + tags.extra_shadows = 0; - /* Do a proper find */ - existingChunk = - yaffs_FindChunkInFile(in, chunkInInode, - &existingTags); + /* Update file size */ + if (object->variant_type == YAFFS_OBJECT_TYPE_FILE) { + yaffs_oh_size_load(oh, + object->variant.file_variant.file_size); + tags.extra_file_size = + object->variant.file_variant.file_size; } - if (existingChunk <= 0) { - /*Hoosterman - how did this happen? */ - - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: existing chunk < 0 in scan" - TENDSTR))); - - } + yaffs_verify_oh(object, oh, &tags, 1); + new_chunk = + yaffs_write_new_chunk(dev, (u8 *) oh, &tags, 1); + } else { + new_chunk = + yaffs_write_new_chunk(dev, buffer, &tags, 1); + } - /* NB The deleted flags should be false, otherwise the chunks will - * not be loaded during a scan - */ + if (new_chunk < 0) { + ret_val = YAFFS_FAIL; + } else { - newSerial = newTags.serialNumber; - existingSerial = existingTags.serialNumber; + /* Now fix up the Tnodes etc. */ - if ((inScan > 0) && - (in->myDev->isYaffs2 || - existingChunk <= 0 || - ((existingSerial + 1) & 3) == newSerial)) { - /* Forward scanning. - * Use new - * Delete the old one and drop through to update the tnode - */ - yaffs_DeleteChunk(dev, existingChunk, 1, - __LINE__); + if (tags.chunk_id == 0) { + /* It's a header */ + object->hdr_chunk = new_chunk; + object->serial = tags.serial_number; } else { - /* Backward scanning or we want to use the existing one - * Use existing. - * Delete the new one and return early so that the tnode isn't changed - */ - yaffs_DeleteChunk(dev, chunkInNAND, 1, - __LINE__); - return YAFFS_OK; + /* It's a data chunk */ + yaffs_put_chunk_in_file(object, tags.chunk_id, + new_chunk, 0); } } - - } - - if (existingChunk == 0) { - in->nDataChunks++; - } - - yaffs_PutLevel0Tnode(dev,tn,chunkInInode,chunkInNAND); - - return YAFFS_OK; -} - -static int yaffs_ReadChunkDataFromObject(yaffs_Object * in, int chunkInInode, - __u8 * buffer) -{ - int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL); - - if (chunkInNAND >= 0) { - return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND, - buffer,NULL); - } else { - T(YAFFS_TRACE_NANDACCESS, - (TSTR("Chunk %d not found zero instead" TENDSTR), - chunkInNAND)); - /* get sane (zero) data if you read a hole */ - memset(buffer, 0, in->myDev->nDataBytesPerChunk); - return 0; } - + if (ret_val == YAFFS_OK) + yaffs_chunk_del(dev, old_chunk, mark_flash, __LINE__); + return ret_val; } -void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn) +static int yaffs_gc_block(struct yaffs_dev *dev, int block, int whole_block) { - int block; - int page; - yaffs_ExtendedTags tags; - yaffs_BlockInfo *bi; - - if (chunkId <= 0) - return; - - - dev->nDeletions++; - block = chunkId / dev->nChunksPerBlock; - page = chunkId % dev->nChunksPerBlock; + int old_chunk; + int ret_val = YAFFS_OK; + int i; + int is_checkpt_block; + int max_copies; + int chunks_before = yaffs_get_erased_chunks(dev); + int chunks_after; + struct yaffs_block_info *bi = yaffs_get_block_info(dev, block); + is_checkpt_block = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT); - if(!yaffs_CheckChunkBit(dev,block,page)) - T(YAFFS_TRACE_VERIFY, - (TSTR("Deleting invalid chunk %d"TENDSTR), - chunkId)); + yaffs_trace(YAFFS_TRACE_TRACING, + "Collecting block %d, in use %d, shrink %d, whole_block %d", + block, bi->pages_in_use, bi->has_shrink_hdr, + whole_block); - bi = yaffs_GetBlockInfo(dev, block); + /*yaffs_verify_free_chunks(dev); */ - T(YAFFS_TRACE_DELETION, - (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId)); + if (bi->block_state == YAFFS_BLOCK_STATE_FULL) + bi->block_state = YAFFS_BLOCK_STATE_COLLECTING; - if (markNAND && - bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) { + bi->has_shrink_hdr = 0; /* clear the flag so that the block can erase */ - yaffs_InitialiseTags(&tags); + dev->gc_disable = 1; - tags.chunkDeleted = 1; + yaffs_summary_gc(dev, block); - yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags); - yaffs_HandleUpdateChunk(dev, chunkId, &tags); + if (is_checkpt_block || !yaffs_still_some_chunks(dev, block)) { + yaffs_trace(YAFFS_TRACE_TRACING, + "Collecting block %d that has no chunks in use", + block); + yaffs_block_became_dirty(dev, block); } else { - dev->nUnmarkedDeletions++; - } - /* Pull out of the management area. - * If the whole block became dirty, this will kick off an erasure. - */ - if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || - bi->blockState == YAFFS_BLOCK_STATE_FULL || - bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) { - dev->nFreeChunks++; + u8 *buffer = yaffs_get_temp_buffer(dev); - yaffs_ClearChunkBit(dev, block, page); + yaffs_verify_blk(dev, bi, block); - bi->pagesInUse--; + max_copies = (whole_block) ? dev->param.chunks_per_block : 5; + old_chunk = block * dev->param.chunks_per_block + dev->gc_chunk; - if (bi->pagesInUse == 0 && - !bi->hasShrinkHeader && - bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING && - bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - yaffs_BlockBecameDirty(dev, block); + for (/* init already done */ ; + ret_val == YAFFS_OK && + dev->gc_chunk < dev->param.chunks_per_block && + (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) && + max_copies > 0; + dev->gc_chunk++, old_chunk++) { + if (yaffs_check_chunk_bit(dev, block, dev->gc_chunk)) { + /* Page is in use and might need to be copied */ + max_copies--; + ret_val = yaffs_gc_process_chunk(dev, bi, + old_chunk, buffer); + } } - - } else { - /* T(("Bad news deleting chunk %d\n",chunkId)); */ + yaffs_release_temp_buffer(dev, buffer); } -} - -static int yaffs_WriteChunkDataToObject(yaffs_Object * in, int chunkInInode, - const __u8 * buffer, int nBytes, - int useReserve) -{ - /* Find old chunk Need to do this to get serial number - * Write new one and patch into tree. - * Invalidate old tags. - */ - - int prevChunkId; - yaffs_ExtendedTags prevTags; - - int newChunkId; - yaffs_ExtendedTags newTags; - - yaffs_Device *dev = in->myDev; - - yaffs_CheckGarbageCollection(dev); - - /* Get the previous chunk at this location in the file if it exists */ - prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags); + yaffs_verify_collected_blk(dev, bi, block); - /* Set up new tags */ - yaffs_InitialiseTags(&newTags); - - newTags.chunkId = chunkInInode; - newTags.objectId = in->objectId; - newTags.serialNumber = - (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1; - newTags.byteCount = nBytes; - - newChunkId = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, - useReserve); - - if (newChunkId >= 0) { - yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0); - - if (prevChunkId >= 0) { - yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__); + if (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { + /* + * The gc did not complete. Set block state back to FULL + * because checkpointing does not restore gc. + */ + bi->block_state = YAFFS_BLOCK_STATE_FULL; + } else { + /* The gc completed. */ + /* Do any required cleanups */ + for (i = 0; i < dev->n_clean_ups; i++) { + /* Time to delete the file too */ + struct yaffs_obj *object = + yaffs_find_by_number(dev, dev->gc_cleanup_list[i]); + if (object) { + yaffs_free_tnode(dev, + object->variant.file_variant.top); + object->variant.file_variant.top = NULL; + yaffs_trace(YAFFS_TRACE_GC, + "yaffs: About to finally delete object %d", + object->obj_id); + yaffs_generic_obj_del(object); + object->my_dev->n_deleted_files--; + } } - - yaffs_CheckFileSanity(in); + chunks_after = yaffs_get_erased_chunks(dev); + if (chunks_before >= chunks_after) + yaffs_trace(YAFFS_TRACE_GC, + "gc did not increase free chunks before %d after %d", + chunks_before, chunks_after); + dev->gc_block = 0; + dev->gc_chunk = 0; + dev->n_clean_ups = 0; } - return newChunkId; + dev->gc_disable = 0; + + return ret_val; } -/* UpdateObjectHeader updates the header on NAND for an object. - * If name is not NULL, then that new name is used. +/* + * find_gc_block() selects the dirtiest block (or close enough) + * for garbage collection. */ -int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force, - int isShrink, int shadows) -{ - yaffs_BlockInfo *bi; - - yaffs_Device *dev = in->myDev; - - int prevChunkId; - int retVal = 0; - - int newChunkId; - yaffs_ExtendedTags newTags; - yaffs_ExtendedTags oldTags; - - __u8 *buffer = NULL; - YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1]; - - yaffs_ObjectHeader *oh = NULL; - - yaffs_strcpy(oldName,"silly old name"); - - if (!in->fake || force) { - - yaffs_CheckGarbageCollection(dev); - yaffs_CheckObjectDetailsLoaded(in); - - buffer = yaffs_GetTempBuffer(in->myDev, __LINE__); - oh = (yaffs_ObjectHeader *) buffer; - - prevChunkId = in->chunkId; - - if (prevChunkId >= 0) { - yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId, - buffer, &oldTags); +static unsigned yaffs_find_gc_block(struct yaffs_dev *dev, + int aggressive, int background) +{ + int i; + int iterations; + unsigned selected = 0; + int prioritised = 0; + int prioritised_exist = 0; + struct yaffs_block_info *bi; + int threshold; - yaffs_VerifyObjectHeader(in,oh,&oldTags,0); + /* First let's see if we need to grab a prioritised block */ + if (dev->has_pending_prioritised_gc && !aggressive) { + dev->gc_dirtiest = 0; + bi = dev->block_info; + for (i = dev->internal_start_block; + i <= dev->internal_end_block && !selected; i++) { - memcpy(oldName, oh->name, sizeof(oh->name)); + if (bi->gc_prioritise) { + prioritised_exist = 1; + if (bi->block_state == YAFFS_BLOCK_STATE_FULL && + yaffs_block_ok_for_gc(dev, bi)) { + selected = i; + prioritised = 1; + } + } + bi++; } - memset(buffer, 0xFF, dev->nDataBytesPerChunk); + /* + * If there is a prioritised block and none was selected then + * this happened because there is at least one old dirty block + * gumming up the works. Let's gc the oldest dirty block. + */ - oh->type = in->variantType; - oh->yst_mode = in->yst_mode; - oh->shadowsObject = shadows; + if (prioritised_exist && + !selected && dev->oldest_dirty_block > 0) + selected = dev->oldest_dirty_block; -#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->yst_uid = in->yst_uid; - oh->yst_gid = in->yst_gid; - oh->yst_atime = in->yst_atime; - oh->yst_mtime = in->yst_mtime; - oh->yst_ctime = in->yst_ctime; - oh->yst_rdev = in->yst_rdev; -#endif - if (in->parent) { - oh->parentObjectId = in->parent->objectId; - } else { - oh->parentObjectId = 0; - } - - if (name && *name) { - memset(oh->name, 0, sizeof(oh->name)); - yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH); - } else if (prevChunkId>=0) { - memcpy(oh->name, oldName, sizeof(oh->name)); - } else { - memset(oh->name, 0, sizeof(oh->name)); - } + if (!prioritised_exist) /* None found, so we can clear this */ + dev->has_pending_prioritised_gc = 0; + } - oh->isShrink = isShrink; + /* If we're doing aggressive GC then we are happy to take a less-dirty + * block, and search harder. + * else (leasurely gc), then we only bother to do this if the + * block has only a few pages in use. + */ - switch (in->variantType) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Should not happen */ - break; - case YAFFS_OBJECT_TYPE_FILE: - oh->fileSize = - (oh->parentObjectId == YAFFS_OBJECTID_DELETED - || oh->parentObjectId == - YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant. - fileVariant.fileSize; - break; - 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; - case YAFFS_OBJECT_TYPE_SYMLINK: - yaffs_strncpy(oh->alias, - in->variant.symLinkVariant.alias, - YAFFS_MAX_ALIAS_LENGTH); - oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; - break; - } + if (!selected) { + int pages_used; + int n_blocks = + dev->internal_end_block - dev->internal_start_block + 1; + if (aggressive) { + threshold = dev->param.chunks_per_block; + iterations = n_blocks; + } else { + int max_threshold; - /* Tags */ - yaffs_InitialiseTags(&newTags); - in->serial++; - newTags.chunkId = 0; - newTags.objectId = in->objectId; - newTags.serialNumber = in->serial; + if (background) + max_threshold = dev->param.chunks_per_block / 2; + else + max_threshold = dev->param.chunks_per_block / 8; - /* Add extra info for file header */ + if (max_threshold < YAFFS_GC_PASSIVE_THRESHOLD) + max_threshold = YAFFS_GC_PASSIVE_THRESHOLD; - newTags.extraHeaderInfoAvailable = 1; - newTags.extraParentObjectId = oh->parentObjectId; - newTags.extraFileLength = oh->fileSize; - newTags.extraIsShrinkHeader = oh->isShrink; - newTags.extraEquivalentObjectId = oh->equivalentObjectId; - newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0; - newTags.extraObjectType = in->variantType; + threshold = background ? (dev->gc_not_done + 2) * 2 : 0; + if (threshold < YAFFS_GC_PASSIVE_THRESHOLD) + threshold = YAFFS_GC_PASSIVE_THRESHOLD; + if (threshold > max_threshold) + threshold = max_threshold; - yaffs_VerifyObjectHeader(in,oh,&newTags,1); + iterations = n_blocks / 16 + 1; + if (iterations > 100) + iterations = 100; + } - /* Create new chunk in NAND */ - newChunkId = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, - (prevChunkId >= 0) ? 1 : 0); + for (i = 0; + i < iterations && + (dev->gc_dirtiest < 1 || + dev->gc_pages_in_use > YAFFS_GC_GOOD_ENOUGH); + i++) { + dev->gc_block_finder++; + if (dev->gc_block_finder < dev->internal_start_block || + dev->gc_block_finder > dev->internal_end_block) + dev->gc_block_finder = + dev->internal_start_block; - if (newChunkId >= 0) { + bi = yaffs_get_block_info(dev, dev->gc_block_finder); - in->chunkId = newChunkId; + pages_used = bi->pages_in_use - bi->soft_del_pages; - if (prevChunkId >= 0) { - yaffs_DeleteChunk(dev, prevChunkId, 1, - __LINE__); + if (bi->block_state == YAFFS_BLOCK_STATE_FULL && + pages_used < dev->param.chunks_per_block && + (dev->gc_dirtiest < 1 || + pages_used < dev->gc_pages_in_use) && + yaffs_block_ok_for_gc(dev, bi)) { + dev->gc_dirtiest = dev->gc_block_finder; + dev->gc_pages_in_use = pages_used; } + } - if(!yaffs_ObjectHasCachedWriteData(in)) - in->dirty = 0; + if (dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold) + selected = dev->gc_dirtiest; + } - /* If this was a shrink, then mark the block that the chunk lives on */ - if (isShrink) { - bi = yaffs_GetBlockInfo(in->myDev, - newChunkId /in->myDev-> nChunksPerBlock); - bi->hasShrinkHeader = 1; - } + /* + * If nothing has been selected for a while, try the oldest dirty + * because that's gumming up the works. + */ + if (!selected && dev->param.is_yaffs2 && + dev->gc_not_done >= (background ? 10 : 20)) { + yaffs2_find_oldest_dirty_seq(dev); + if (dev->oldest_dirty_block > 0) { + selected = dev->oldest_dirty_block; + dev->gc_dirtiest = selected; + dev->oldest_dirty_gc_count++; + bi = yaffs_get_block_info(dev, selected); + dev->gc_pages_in_use = + bi->pages_in_use - bi->soft_del_pages; + } else { + dev->gc_not_done = 0; } + } - retVal = newChunkId; + if (selected) { + yaffs_trace(YAFFS_TRACE_GC, + "GC Selected block %d with %d free, prioritised:%d", + selected, + dev->param.chunks_per_block - dev->gc_pages_in_use, + prioritised); - } + dev->n_gc_blocks++; + if (background) + dev->bg_gcs++; - if (buffer) - yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); + dev->gc_dirtiest = 0; + dev->gc_pages_in_use = 0; + dev->gc_not_done = 0; + if (dev->refresh_skip > 0) + dev->refresh_skip--; + } else { + dev->gc_not_done++; + yaffs_trace(YAFFS_TRACE_GC, + "GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s", + dev->gc_block_finder, dev->gc_not_done, threshold, + dev->gc_dirtiest, dev->gc_pages_in_use, + dev->oldest_dirty_block, background ? " bg" : ""); + } - return retVal; + return selected; } -/*------------------------ Short Operations Cache ---------------------------------------- - * In many situations 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. - * In Linux, the page cache provides read buffering aand the short op cache provides write - * buffering. +/* New garbage collector + * If we're very low on erased blocks then we do aggressive garbage collection + * otherwise we do "leasurely" garbage collection. + * Aggressive gc looks further (whole array) and will accept less dirty blocks. + * Passive gc only inspects smaller areas and only accepts more dirty blocks. * - * There are a limited number (~10) of cache chunks per device so that we don't - * need a very intelligent search. + * The idea is to help clear out space in a more spread-out manner. + * Dunno if it really does anything useful. */ - -static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj) +static int yaffs_check_gc(struct yaffs_dev *dev, int background) { - yaffs_Device *dev = obj->myDev; - int i; - yaffs_ChunkCache *cache; - int nCaches = obj->myDev->nShortOpCaches; + int aggressive = 0; + int gc_ok = YAFFS_OK; + int max_tries = 0; + int min_erased; + int erased_chunks; + int checkpt_block_adjust; - for(i = 0; i < nCaches; i++){ - cache = &dev->srCache[i]; - if (cache->object == obj && - cache->dirty) - return 1; - } + if (dev->param.gc_control && (dev->param.gc_control(dev) & 1) == 0) + return YAFFS_OK; - return 0; -} + if (dev->gc_disable) + /* Bail out so we don't get recursive gc */ + return YAFFS_OK; + /* This loop should pass the first time. + * Only loops here if the collection does not increase space. + */ -static void yaffs_FlushFilesChunkCache(yaffs_Object * obj) -{ - yaffs_Device *dev = obj->myDev; - int lowest = -99; /* Stop compiler whining. */ - int i; - yaffs_ChunkCache *cache; - int chunkWritten = 0; - int nCaches = obj->myDev->nShortOpCaches; + do { + max_tries++; - if (nCaches > 0) { - do { - cache = NULL; + checkpt_block_adjust = yaffs_calc_checkpt_blocks_required(dev); - /* Find the dirty cache for this object with the lowest chunk id. */ - for (i = 0; i < nCaches; i++) { - if (dev->srCache[i].object == obj && - dev->srCache[i].dirty) { - if (!cache - || dev->srCache[i].chunkId < - lowest) { - cache = &dev->srCache[i]; - lowest = cache->chunkId; - } - } - } + min_erased = + dev->param.n_reserved_blocks + checkpt_block_adjust + 1; + erased_chunks = + dev->n_erased_blocks * dev->param.chunks_per_block; - if (cache && !cache->locked) { - /* Write it out and free it up */ + /* If we need a block soon then do aggressive gc. */ + if (dev->n_erased_blocks < min_erased) + aggressive = 1; + else { + if (!background + && erased_chunks > (dev->n_free_chunks / 4)) + break; - chunkWritten = - yaffs_WriteChunkDataToObject(cache->object, - cache->chunkId, - cache->data, - cache->nBytes, - 1); - cache->dirty = 0; - cache->object = NULL; + if (dev->gc_skip > 20) + dev->gc_skip = 20; + if (erased_chunks < dev->n_free_chunks / 2 || + dev->gc_skip < 1 || background) + aggressive = 0; + else { + dev->gc_skip--; + break; } + } - } while (cache && chunkWritten > 0); + dev->gc_skip = 5; - if (cache) { - /* Hoosterman, disk full while writing cache out. */ - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs tragedy: no space during cache write" TENDSTR))); + /* If we don't already have a block being gc'd then see if we + * should start another */ + if (dev->gc_block < 1 && !aggressive) { + dev->gc_block = yaffs2_find_refresh_block(dev); + dev->gc_chunk = 0; + dev->n_clean_ups = 0; + } + if (dev->gc_block < 1) { + dev->gc_block = + yaffs_find_gc_block(dev, aggressive, background); + dev->gc_chunk = 0; + dev->n_clean_ups = 0; } - } - -} - -/*yaffs_FlushEntireDeviceCache(dev) - * - * - */ -void yaffs_FlushEntireDeviceCache(yaffs_Device *dev) -{ - yaffs_Object *obj; - int nCaches = dev->nShortOpCaches; - int i; + if (dev->gc_block > 0) { + dev->all_gcs++; + if (!aggressive) + dev->passive_gc_count++; - /* Find a dirty object in the cache and flush it... - * until there are no further dirty objects. - */ - do { - obj = NULL; - for( i = 0; i < nCaches && !obj; i++) { - if (dev->srCache[i].object && - dev->srCache[i].dirty) - obj = dev->srCache[i].object; + yaffs_trace(YAFFS_TRACE_GC, + "yaffs: GC n_erased_blocks %d aggressive %d", + dev->n_erased_blocks, aggressive); + gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive); } - if(obj) - yaffs_FlushFilesChunkCache(obj); - } while(obj); + if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) && + dev->gc_block > 0) { + yaffs_trace(YAFFS_TRACE_GC, + "yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d", + dev->n_erased_blocks, max_tries, + dev->gc_block); + } + } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) && + (dev->gc_block > 0) && (max_tries < 2)); + return aggressive ? gc_ok : YAFFS_OK; } - -/* Grab us a cache 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. +/* + * yaffs_bg_gc() + * Garbage collects. Intended to be called from a background thread. + * Returns non-zero if at least half the free chunks are erased. */ -static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device * dev) +int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency) { - int i; - int usage; - int theOne; + int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block; - if (dev->nShortOpCaches > 0) { - for (i = 0; i < dev->nShortOpCaches; i++) { - if (!dev->srCache[i].object) - return &dev->srCache[i]; - } + yaffs_trace(YAFFS_TRACE_BACKGROUND, "Background gc %u", urgency); - return NULL; - - theOne = -1; - usage = 0; /* just to stop the compiler grizzling */ + yaffs_check_gc(dev, 1); + return erased_chunks > dev->n_free_chunks / 2; +} - for (i = 0; i < dev->nShortOpCaches; i++) { - if (!dev->srCache[i].dirty && - ((dev->srCache[i].lastUse < usage && theOne >= 0) || - theOne < 0)) { - usage = dev->srCache[i].lastUse; - theOne = i; - } - } +/*-------------------- Data file manipulation -----------------*/ +static int yaffs_rd_data_obj(struct yaffs_obj *in, int inode_chunk, u8 * buffer) +{ + int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL); - return theOne >= 0 ? &dev->srCache[theOne] : NULL; - } else { - return NULL; + if (nand_chunk >= 0) + return yaffs_rd_chunk_tags_nand(in->my_dev, nand_chunk, + buffer, NULL); + else { + yaffs_trace(YAFFS_TRACE_NANDACCESS, + "Chunk %d not found zero instead", + nand_chunk); + /* get sane (zero) data if you read a hole */ + memset(buffer, 0, in->my_dev->data_bytes_per_chunk); + return 0; } } -static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device * dev) +void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash, + int lyn) { - yaffs_ChunkCache *cache; - yaffs_Object *theObj; - int usage; - int i; + int block; + int page; + struct yaffs_ext_tags tags; + struct yaffs_block_info *bi; - if (dev->nShortOpCaches > 0) { - /* Try find a non-dirty one... */ + if (chunk_id <= 0) + return; - cache = yaffs_GrabChunkCacheWorker(dev); + dev->n_deletions++; + block = chunk_id / dev->param.chunks_per_block; + page = chunk_id % dev->param.chunks_per_block; - 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. - */ + if (!yaffs_check_chunk_bit(dev, block, page)) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Deleting invalid chunk %d", chunk_id); - /* With locking we can't assume we can use entry zero */ + bi = yaffs_get_block_info(dev, block); - theObj = NULL; - usage = -1; - cache = NULL; + yaffs2_update_oldest_dirty_seq(dev, block, bi); - for (i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].object && - !dev->srCache[i].locked && - (dev->srCache[i].lastUse < usage || !cache)) - { - usage = dev->srCache[i].lastUse; - theObj = dev->srCache[i].object; - cache = &dev->srCache[i]; - } - } - - if (!cache || cache->dirty) { - /* Flush and try again */ - yaffs_FlushFilesChunkCache(theObj); - cache = yaffs_GrabChunkCacheWorker(dev); - } + yaffs_trace(YAFFS_TRACE_DELETION, + "line %d delete of chunk %d", + lyn, chunk_id); - } - return cache; - } else - return NULL; + if (!dev->param.is_yaffs2 && mark_flash && + bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) { -} + memset(&tags, 0, sizeof(tags)); + tags.is_deleted = 1; + yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags); + yaffs_handle_chunk_update(dev, chunk_id, &tags); + } else { + dev->n_unmarked_deletions++; + } -/* Find a cached chunk */ -static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object * obj, - int chunkId) -{ - yaffs_Device *dev = obj->myDev; - int i; - if (dev->nShortOpCaches > 0) { - for (i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].object == obj && - dev->srCache[i].chunkId == chunkId) { - dev->cacheHits++; + /* Pull out of the management area. + * If the whole block became dirty, this will kick off an erasure. + */ + if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING || + bi->block_state == YAFFS_BLOCK_STATE_FULL || + bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN || + bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { + dev->n_free_chunks++; + yaffs_clear_chunk_bit(dev, block, page); + bi->pages_in_use--; - return &dev->srCache[i]; - } + if (bi->pages_in_use == 0 && + !bi->has_shrink_hdr && + bi->block_state != YAFFS_BLOCK_STATE_ALLOCATING && + bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCAN) { + yaffs_block_became_dirty(dev, block); } } - return NULL; } -/* Mark the chunk for the least recently used algorithym */ -static void yaffs_UseChunkCache(yaffs_Device * dev, yaffs_ChunkCache * cache, - int isAWrite) +static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, + const u8 *buffer, int n_bytes, int use_reserve) { + /* Find old chunk Need to do this to get serial number + * Write new one and patch into tree. + * Invalidate old tags. + */ - if (dev->nShortOpCaches > 0) { - if (dev->srLastUse < 0 || dev->srLastUse > 100000000) { - /* Reset the cache usages */ - int i; - for (i = 1; i < dev->nShortOpCaches; i++) { - dev->srCache[i].lastUse = 0; - } - dev->srLastUse = 0; - } - - dev->srLastUse++; - - cache->lastUse = dev->srLastUse; + int prev_chunk_id; + struct yaffs_ext_tags prev_tags; + int new_chunk_id; + struct yaffs_ext_tags new_tags; + struct yaffs_dev *dev = in->my_dev; - if (isAWrite) { - cache->dirty = 1; - } - } -} + yaffs_check_gc(dev, 0); -/* 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) -{ - if (object->myDev->nShortOpCaches > 0) { - yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId); + /* Get the previous chunk at this location in the file if it exists. + * If it does not exist then put a zero into the tree. This creates + * the tnode now, rather than later when it is harder to clean up. + */ + prev_chunk_id = yaffs_find_chunk_in_file(in, inode_chunk, &prev_tags); + if (prev_chunk_id < 1 && + !yaffs_put_chunk_in_file(in, inode_chunk, 0, 0)) + return 0; - if (cache) { - cache->object = NULL; - } - } -} + /* Set up new tags */ + memset(&new_tags, 0, sizeof(new_tags)); -/* 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; + new_tags.chunk_id = inode_chunk; + new_tags.obj_id = in->obj_id; + new_tags.serial_number = + (prev_chunk_id > 0) ? prev_tags.serial_number + 1 : 1; + new_tags.n_bytes = n_bytes; - if (dev->nShortOpCaches > 0) { - /* Invalidate it. */ - for (i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].object == in) { - dev->srCache[i].object = NULL; - } - } + if (n_bytes < 1 || n_bytes > dev->param.total_bytes_per_chunk) { + yaffs_trace(YAFFS_TRACE_ERROR, + "Writing %d bytes to chunk!!!!!!!!!", + n_bytes); + BUG(); } -} -/*--------------------- Checkpointing --------------------*/ + new_chunk_id = + yaffs_write_new_chunk(dev, buffer, &new_tags, use_reserve); + if (new_chunk_id > 0) { + yaffs_put_chunk_in_file(in, inode_chunk, new_chunk_id, 0); -static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev,int head) -{ - yaffs_CheckpointValidity cp; + if (prev_chunk_id > 0) + yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__); - memset(&cp,0,sizeof(cp)); - - cp.structType = sizeof(cp); - cp.magic = YAFFS_MAGIC; - cp.version = YAFFS_CHECKPOINT_VERSION; - cp.head = (head) ? 1 : 0; + yaffs_verify_file_sane(in); + } + return new_chunk_id; - return (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp))? - 1 : 0; } -static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head) -{ - yaffs_CheckpointValidity cp; - int ok; - - ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); - if(ok) - ok = (cp.structType == sizeof(cp)) && - (cp.magic == YAFFS_MAGIC) && - (cp.version == YAFFS_CHECKPOINT_VERSION) && - (cp.head == ((head) ? 1 : 0)); - return ok ? 1 : 0; -} -static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp, - yaffs_Device *dev) +static int yaffs_do_xattrib_mod(struct yaffs_obj *obj, int set, + const YCHAR *name, const void *value, int size, + int flags) { - cp->nErasedBlocks = dev->nErasedBlocks; - cp->allocationBlock = dev->allocationBlock; - cp->allocationPage = dev->allocationPage; - cp->nFreeChunks = dev->nFreeChunks; + struct yaffs_xattr_mod xmod; + int result; - cp->nDeletedFiles = dev->nDeletedFiles; - cp->nUnlinkedFiles = dev->nUnlinkedFiles; - cp->nBackgroundDeletions = dev->nBackgroundDeletions; - cp->sequenceNumber = dev->sequenceNumber; - cp->oldestDirtySequence = dev->oldestDirtySequence; + xmod.set = set; + xmod.name = name; + xmod.data = value; + xmod.size = size; + xmod.flags = flags; + xmod.result = -ENOSPC; -} + result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod); -static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev, - yaffs_CheckpointDevice *cp) -{ - dev->nErasedBlocks = cp->nErasedBlocks; - dev->allocationBlock = cp->allocationBlock; - dev->allocationPage = cp->allocationPage; - dev->nFreeChunks = cp->nFreeChunks; - - dev->nDeletedFiles = cp->nDeletedFiles; - dev->nUnlinkedFiles = cp->nUnlinkedFiles; - dev->nBackgroundDeletions = cp->nBackgroundDeletions; - dev->sequenceNumber = cp->sequenceNumber; - dev->oldestDirtySequence = cp->oldestDirtySequence; + if (result > 0) + return xmod.result; + else + return -ENOSPC; } - -static int yaffs_WriteCheckpointDevice(yaffs_Device *dev) +static int yaffs_apply_xattrib_mod(struct yaffs_obj *obj, char *buffer, + struct yaffs_xattr_mod *xmod) { - yaffs_CheckpointDevice cp; - __u32 nBytes; - __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); + int retval = 0; + int x_offs = sizeof(struct yaffs_obj_hdr); + struct yaffs_dev *dev = obj->my_dev; + int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr); + char *x_buffer = buffer + x_offs; - int ok; - - /* Write device runtime values*/ - yaffs_DeviceToCheckpointDevice(&cp,dev); - cp.structType = sizeof(cp); - - ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); - - /* Write block info */ - if(ok) { - nBytes = nBlocks * sizeof(yaffs_BlockInfo); - ok = (yaffs_CheckpointWrite(dev,dev->blockInfo,nBytes) == nBytes); - } + if (xmod->set) + retval = + nval_set(x_buffer, x_size, xmod->name, xmod->data, + xmod->size, xmod->flags); + else + retval = nval_del(x_buffer, x_size, xmod->name); - /* Write chunk bits */ - if(ok) { - nBytes = nBlocks * dev->chunkBitmapStride; - ok = (yaffs_CheckpointWrite(dev,dev->chunkBits,nBytes) == nBytes); - } - return ok ? 1 : 0; + obj->has_xattr = nval_hasvalues(x_buffer, x_size); + obj->xattr_known = 1; + xmod->result = retval; + return retval; } -static int yaffs_ReadCheckpointDevice(yaffs_Device *dev) +static int yaffs_do_xattrib_fetch(struct yaffs_obj *obj, const YCHAR *name, + void *value, int size) { - yaffs_CheckpointDevice cp; - __u32 nBytes; - __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); + char *buffer = NULL; + int result; + struct yaffs_ext_tags tags; + struct yaffs_dev *dev = obj->my_dev; + int x_offs = sizeof(struct yaffs_obj_hdr); + int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr); + char *x_buffer; + int retval = 0; - int ok; - - ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); - if(!ok) - return 0; + if (obj->hdr_chunk < 1) + return -ENODATA; - if(cp.structType != sizeof(cp)) - return 0; - - - yaffs_CheckpointDeviceToDevice(dev,&cp); + /* If we know that the object has no xattribs then don't do all the + * reading and parsing. + */ + if (obj->xattr_known && !obj->has_xattr) { + if (name) + return -ENODATA; + else + return 0; + } - nBytes = nBlocks * sizeof(yaffs_BlockInfo); + buffer = (char *)yaffs_get_temp_buffer(dev); + if (!buffer) + return -ENOMEM; - ok = (yaffs_CheckpointRead(dev,dev->blockInfo,nBytes) == nBytes); + result = + yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, (u8 *) buffer, &tags); - if(!ok) - return 0; - nBytes = nBlocks * dev->chunkBitmapStride; + if (result != YAFFS_OK) + retval = -ENOENT; + else { + x_buffer = buffer + x_offs; - ok = (yaffs_CheckpointRead(dev,dev->chunkBits,nBytes) == nBytes); + if (!obj->xattr_known) { + obj->has_xattr = nval_hasvalues(x_buffer, x_size); + obj->xattr_known = 1; + } - return ok ? 1 : 0; + if (name) + retval = nval_get(x_buffer, x_size, name, value, size); + else + retval = nval_list(x_buffer, x_size, value, size); + } + yaffs_release_temp_buffer(dev, (u8 *) buffer); + return retval; } -static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp, - yaffs_Object *obj) +int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name, + const void *value, int size, int flags) { - - cp->objectId = obj->objectId; - cp->parentId = (obj->parent) ? obj->parent->objectId : 0; - cp->chunkId = obj->chunkId; - cp->variantType = obj->variantType; - cp->deleted = obj->deleted; - cp->softDeleted = obj->softDeleted; - cp->unlinked = obj->unlinked; - cp->fake = obj->fake; - cp->renameAllowed = obj->renameAllowed; - cp->unlinkAllowed = obj->unlinkAllowed; - cp->serial = obj->serial; - cp->nDataChunks = obj->nDataChunks; - - if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) - cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize; - else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) - cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId; + return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags); } -static void yaffs_CheckpointObjectToObject( yaffs_Object *obj,yaffs_CheckpointObject *cp) +int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name) { - - yaffs_Object *parent; - - obj->objectId = cp->objectId; - - if(cp->parentId) - parent = yaffs_FindOrCreateObjectByNumber( - obj->myDev, - cp->parentId, - YAFFS_OBJECT_TYPE_DIRECTORY); - else - parent = NULL; - - if(parent) - yaffs_AddObjectToDirectory(parent, obj); - - obj->chunkId = cp->chunkId; - obj->variantType = cp->variantType; - obj->deleted = cp->deleted; - obj->softDeleted = cp->softDeleted; - obj->unlinked = cp->unlinked; - obj->fake = cp->fake; - obj->renameAllowed = cp->renameAllowed; - obj->unlinkAllowed = cp->unlinkAllowed; - obj->serial = cp->serial; - obj->nDataChunks = cp->nDataChunks; - - if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) - obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId; - else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) - obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId; - - if(obj->objectId >= YAFFS_NOBJECT_BUCKETS) - obj->lazyLoaded = 1; + return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0); } - - -static int yaffs_CheckpointTnodeWorker(yaffs_Object * in, yaffs_Tnode * tn, - __u32 level, int chunkOffset) +int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value, + int size) { - int i; - yaffs_Device *dev = in->myDev; - int ok = 1; - int nTnodeBytes = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; - - if (tn) { - if (level > 0) { - - for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){ - if (tn->internal[i]) { - ok = yaffs_CheckpointTnodeWorker(in, - tn->internal[i], - level - 1, - (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i); - } - } - } else if (level == 0) { - __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS; - /* printf("write tnode at %d\n",baseOffset); */ - ok = (yaffs_CheckpointWrite(dev,&baseOffset,sizeof(baseOffset)) == sizeof(baseOffset)); - if(ok) - ok = (yaffs_CheckpointWrite(dev,tn,nTnodeBytes) == nTnodeBytes); - } - } - - return ok; - + return yaffs_do_xattrib_fetch(obj, name, value, size); } -static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj) +int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size) { - __u32 endMarker = ~0; - int ok = 1; - - if(obj->variantType == YAFFS_OBJECT_TYPE_FILE){ - ok = yaffs_CheckpointTnodeWorker(obj, - obj->variant.fileVariant.top, - obj->variant.fileVariant.topLevel, - 0); - if(ok) - ok = (yaffs_CheckpointWrite(obj->myDev,&endMarker,sizeof(endMarker)) == - sizeof(endMarker)); - } - - return ok ? 1 : 0; + return yaffs_do_xattrib_fetch(obj, NULL, buffer, size); } -static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj) +static void yaffs_check_obj_details_loaded(struct yaffs_obj *in) { - __u32 baseChunk; - int ok = 1; - yaffs_Device *dev = obj->myDev; - yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant; - yaffs_Tnode *tn; - int nread = 0; - - ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk)); + u8 *buf; + struct yaffs_obj_hdr *oh; + struct yaffs_dev *dev; + struct yaffs_ext_tags tags; + int result; + int alloc_failed = 0; - while(ok && (~baseChunk)){ - nread++; - /* Read level 0 tnode */ + if (!in || !in->lazy_loaded || in->hdr_chunk < 1) + return; + dev = in->my_dev; + in->lazy_loaded = 0; + buf = yaffs_get_temp_buffer(dev); - /* printf("read tnode at %d\n",baseChunk); */ - tn = yaffs_GetTnodeRaw(dev); - if(tn) - ok = (yaffs_CheckpointRead(dev,tn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8) == - (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); - else - ok = 0; + result = yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, buf, &tags); + oh = (struct yaffs_obj_hdr *)buf; - if(tn && ok){ - ok = yaffs_AddOrFindLevel0Tnode(dev, - fileStructPtr, - baseChunk, - tn) ? 1 : 0; - - } - - if(ok) - ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk)); + in->yst_mode = oh->yst_mode; + yaffs_load_attribs(in, oh); + yaffs_set_obj_name_from_oh(in, oh); + if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { + in->variant.symlink_variant.alias = + yaffs_clone_str(oh->alias); + if (!in->variant.symlink_variant.alias) + alloc_failed = 1; /* Not returned */ } - - T(YAFFS_TRACE_CHECKPOINT,( - TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR), - nread,baseChunk,ok)); - - return ok ? 1 : 0; + yaffs_release_temp_buffer(dev, buf); } - -static int yaffs_WriteCheckpointObjects(yaffs_Device *dev) +static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR *name, + const YCHAR *oh_name, int buff_size) { - yaffs_Object *obj; - yaffs_CheckpointObject cp; - int i; - int ok = 1; - struct list_head *lh; - - - /* Iterate through the objects in each hash entry, - * dumping them to the checkpointing stream. - */ - - for(i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++){ - list_for_each(lh, &dev->objectBucket[i].list) { - if (lh) { - obj = list_entry(lh, yaffs_Object, hashLink); - if (!obj->deferedFree) { - yaffs_ObjectToCheckpointObject(&cp,obj); - cp.structType = sizeof(cp); - - T(YAFFS_TRACE_CHECKPOINT,( - TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR), - cp.objectId,cp.parentId,cp.variantType,cp.chunkId,(unsigned) obj)); - - ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); - - if(ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE){ - ok = yaffs_WriteCheckpointTnodes(obj); - } - } +#ifdef CONFIG_YAFFS_AUTO_UNICODE + if (dev->param.auto_unicode) { + if (*oh_name) { + /* It is an ASCII name, do an ASCII to + * unicode conversion */ + const char *ascii_oh_name = (const char *)oh_name; + int n = buff_size - 1; + while (n > 0 && *ascii_oh_name) { + *name = *ascii_oh_name; + name++; + ascii_oh_name++; + n--; } + } else { + yaffs_strncpy(name, oh_name + 1, buff_size - 1); } - } - - /* Dump end of list */ - memset(&cp,0xFF,sizeof(yaffs_CheckpointObject)); - cp.structType = sizeof(cp); - - if(ok) - ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); - - return ok ? 1 : 0; + } else { +#else + dev = dev; + { +#endif + yaffs_strncpy(name, oh_name, buff_size - 1); + } } -static int yaffs_ReadCheckpointObjects(yaffs_Device *dev) +static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR *oh_name, + const YCHAR *name) { - yaffs_Object *obj; - yaffs_CheckpointObject cp; - int ok = 1; - int done = 0; - yaffs_Object *hardList = NULL; +#ifdef CONFIG_YAFFS_AUTO_UNICODE - while(ok && !done) { - ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); - if(cp.structType != sizeof(cp)) { - T(YAFFS_TRACE_CHECKPOINT,(TSTR("struct size %d instead of %d ok %d"TENDSTR), - cp.structType,sizeof(cp),ok)); - ok = 0; - } + int is_ascii; + YCHAR *w; - T(YAFFS_TRACE_CHECKPOINT,(TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR), - cp.objectId,cp.parentId,cp.variantType,cp.chunkId)); + if (dev->param.auto_unicode) { - if(ok && cp.objectId == ~0) - done = 1; - else if(ok){ - obj = yaffs_FindOrCreateObjectByNumber(dev,cp.objectId, cp.variantType); - if(obj) { - yaffs_CheckpointObjectToObject(obj,&cp); - if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) { - ok = yaffs_ReadCheckpointTnodes(obj); - } else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { - obj->hardLinks.next = - (struct list_head *) - hardList; - hardList = obj; - } + is_ascii = 1; + w = name; + + /* Figure out if the name will fit in ascii character set */ + while (is_ascii && *w) { + if ((*w) & 0xff00) + is_ascii = 0; + w++; + } + if (is_ascii) { + /* It is an ASCII name, so convert unicode to ascii */ + char *ascii_oh_name = (char *)oh_name; + int n = YAFFS_MAX_NAME_LENGTH - 1; + while (n > 0 && *name) { + *ascii_oh_name = *name; + name++; + ascii_oh_name++; + n--; } + } else { + /* Unicode name, so save starting at the second YCHAR */ + *oh_name = 0; + yaffs_strncpy(oh_name + 1, name, YAFFS_MAX_NAME_LENGTH - 2); } + } else { +#else + dev = dev; + { +#endif + yaffs_strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1); } - - if(ok) - yaffs_HardlinkFixup(dev,hardList); - - return ok ? 1 : 0; } -static int yaffs_WriteCheckpointSum(yaffs_Device *dev) -{ - __u32 checkpointSum; - int ok; - - yaffs_GetCheckpointSum(dev,&checkpointSum); - - ok = (yaffs_CheckpointWrite(dev,&checkpointSum,sizeof(checkpointSum)) == sizeof(checkpointSum)); - - if(!ok) - return 0; - - return 1; -} - -static int yaffs_ReadCheckpointSum(yaffs_Device *dev) +/* UpdateObjectHeader updates the header on NAND for an object. + * If name is not NULL, then that new name is used. + */ +int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, int force, + int is_shrink, int shadows, struct yaffs_xattr_mod *xmod) { - __u32 checkpointSum0; - __u32 checkpointSum1; - int ok; - - yaffs_GetCheckpointSum(dev,&checkpointSum0); - ok = (yaffs_CheckpointRead(dev,&checkpointSum1,sizeof(checkpointSum1)) == sizeof(checkpointSum1)); + struct yaffs_block_info *bi; + struct yaffs_dev *dev = in->my_dev; + int prev_chunk_id; + int ret_val = 0; + int result = 0; + int new_chunk_id; + struct yaffs_ext_tags new_tags; + struct yaffs_ext_tags old_tags; + const YCHAR *alias = NULL; + u8 *buffer = NULL; + YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1]; + struct yaffs_obj_hdr *oh = NULL; + loff_t file_size = 0; - if(!ok) - return 0; + yaffs_strcpy(old_name, _Y("silly old name")); - if(checkpointSum0 != checkpointSum1) - return 0; + if (in->fake && in != dev->root_dir && !force && !xmod) + return ret_val; - return 1; -} + yaffs_check_gc(dev, 0); + yaffs_check_obj_details_loaded(in); + buffer = yaffs_get_temp_buffer(in->my_dev); + oh = (struct yaffs_obj_hdr *)buffer; -static int yaffs_WriteCheckpointData(yaffs_Device *dev) -{ + prev_chunk_id = in->hdr_chunk; - int ok = 1; + if (prev_chunk_id > 0) { + result = yaffs_rd_chunk_tags_nand(dev, prev_chunk_id, + buffer, &old_tags); - if(dev->skipCheckpointWrite || !dev->isYaffs2){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint write" TENDSTR))); - ok = 0; - } - - if(ok) - ok = yaffs_CheckpointOpen(dev,1); - - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR))); - ok = yaffs_WriteCheckpointValidityMarker(dev,1); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint device" TENDSTR))); - ok = yaffs_WriteCheckpointDevice(dev); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint objects" TENDSTR))); - ok = yaffs_WriteCheckpointObjects(dev); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR))); - ok = yaffs_WriteCheckpointValidityMarker(dev,0); - } - - if(ok){ - ok = yaffs_WriteCheckpointSum(dev); + yaffs_verify_oh(in, oh, &old_tags, 0); + memcpy(old_name, oh->name, sizeof(oh->name)); + memset(buffer, 0xff, sizeof(struct yaffs_obj_hdr)); + } else { + memset(buffer, 0xff, dev->data_bytes_per_chunk); } + oh->type = in->variant_type; + oh->yst_mode = in->yst_mode; + oh->shadows_obj = oh->inband_shadowed_obj_id = shadows; - if(!yaffs_CheckpointClose(dev)) - ok = 0; - - if(ok) - dev->isCheckpointed = 1; - else - dev->isCheckpointed = 0; + yaffs_load_attribs_oh(oh, in); - return dev->isCheckpointed; -} - -static int yaffs_ReadCheckpointData(yaffs_Device *dev) -{ - int ok = 1; - - if(dev->skipCheckpointRead || !dev->isYaffs2){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint read" TENDSTR))); - ok = 0; - } - - if(ok) - ok = yaffs_CheckpointOpen(dev,0); /* open for read */ - - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR))); - ok = yaffs_ReadCheckpointValidityMarker(dev,1); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint device" TENDSTR))); - ok = yaffs_ReadCheckpointDevice(dev); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint objects" TENDSTR))); - ok = yaffs_ReadCheckpointObjects(dev); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR))); - ok = yaffs_ReadCheckpointValidityMarker(dev,0); - } + if (in->parent) + oh->parent_obj_id = in->parent->obj_id; + else + oh->parent_obj_id = 0; - if(ok){ - ok = yaffs_ReadCheckpointSum(dev); - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint checksum %d" TENDSTR),ok)); + if (name && *name) { + memset(oh->name, 0, sizeof(oh->name)); + yaffs_load_oh_from_name(dev, oh->name, name); + } else if (prev_chunk_id > 0) { + memcpy(oh->name, old_name, sizeof(oh->name)); + } else { + memset(oh->name, 0, sizeof(oh->name)); } - if(!yaffs_CheckpointClose(dev)) - ok = 0; - - if(ok) - dev->isCheckpointed = 1; - else - dev->isCheckpointed = 0; + oh->is_shrink = is_shrink; - return ok ? 1 : 0; - -} - -static void yaffs_InvalidateCheckpoint(yaffs_Device *dev) -{ - if(dev->isCheckpointed || - dev->blocksInCheckpoint > 0){ - dev->isCheckpointed = 0; - yaffs_CheckpointInvalidateStream(dev); - if(dev->superBlock && dev->markSuperBlockDirty) - dev->markSuperBlockDirty(dev->superBlock); + switch (in->variant_type) { + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* Should not happen */ + break; + case YAFFS_OBJECT_TYPE_FILE: + if (oh->parent_obj_id != YAFFS_OBJECTID_DELETED && + oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED) + file_size = in->variant.file_variant.file_size; + yaffs_oh_size_load(oh, file_size); + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + oh->equiv_id = in->variant.hardlink_variant.equiv_id; + break; + case YAFFS_OBJECT_TYPE_SPECIAL: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + alias = in->variant.symlink_variant.alias; + if (!alias) + alias = _Y("no alias"); + yaffs_strncpy(oh->alias, alias, YAFFS_MAX_ALIAS_LENGTH); + oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; + break; } -} + /* process any xattrib modifications */ + if (xmod) + yaffs_apply_xattrib_mod(in, (char *)buffer, xmod); -int yaffs_CheckpointSave(yaffs_Device *dev) -{ + /* Tags */ + memset(&new_tags, 0, sizeof(new_tags)); + in->serial++; + new_tags.chunk_id = 0; + new_tags.obj_id = in->obj_id; + new_tags.serial_number = in->serial; - T(YAFFS_TRACE_CHECKPOINT,(TSTR("save entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); + /* Add extra info for file header */ + new_tags.extra_available = 1; + new_tags.extra_parent_id = oh->parent_obj_id; + new_tags.extra_file_size = file_size; + new_tags.extra_is_shrink = oh->is_shrink; + new_tags.extra_equiv_id = oh->equiv_id; + new_tags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0; + new_tags.extra_obj_type = in->variant_type; + yaffs_verify_oh(in, oh, &new_tags, 1); - yaffs_VerifyObjects(dev); - yaffs_VerifyBlocks(dev); - yaffs_VerifyFreeChunks(dev); + /* Create new chunk in NAND */ + new_chunk_id = + yaffs_write_new_chunk(dev, buffer, &new_tags, + (prev_chunk_id > 0) ? 1 : 0); - if(!dev->isCheckpointed) { - yaffs_InvalidateCheckpoint(dev); - yaffs_WriteCheckpointData(dev); - } + if (buffer) + yaffs_release_temp_buffer(dev, buffer); - T(YAFFS_TRACE_ALWAYS,(TSTR("save exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); + if (new_chunk_id < 0) + return new_chunk_id; - return dev->isCheckpointed; -} + in->hdr_chunk = new_chunk_id; -int yaffs_CheckpointRestore(yaffs_Device *dev) -{ - int retval; - T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); + if (prev_chunk_id > 0) + yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__); - retval = yaffs_ReadCheckpointData(dev); + if (!yaffs_obj_cache_dirty(in)) + in->dirty = 0; - if(dev->isCheckpointed){ - yaffs_VerifyObjects(dev); - yaffs_VerifyBlocks(dev); - yaffs_VerifyFreeChunks(dev); + /* If this was a shrink, then mark the block + * that the chunk lives on */ + if (is_shrink) { + bi = yaffs_get_block_info(in->my_dev, + new_chunk_id / + in->my_dev->param.chunks_per_block); + bi->has_shrink_hdr = 1; } - T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); - return retval; + return new_chunk_id; } /*--------------------- File read/write ------------------------ @@ -4447,622 +3432,550 @@ int yaffs_CheckpointRestore(yaffs_Device *dev) * Curve-balls: the first chunk might also be the last chunk. */ -int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, loff_t offset, - int nBytes) +int yaffs_file_rd(struct yaffs_obj *in, u8 * buffer, loff_t offset, int n_bytes) { + int chunk; + u32 start; + int n_copy; + int n = n_bytes; + int n_done = 0; + struct yaffs_cache *cache; + struct yaffs_dev *dev; - __u32 chunk = 0; - __u32 start = 0; - int nToCopy; - int n = nBytes; - int nDone = 0; - yaffs_ChunkCache *cache; - - yaffs_Device *dev; - - dev = in->myDev; + dev = in->my_dev; while (n > 0) { - //chunk = offset / dev->nDataBytesPerChunk + 1; - //start = offset % dev->nDataBytesPerChunk; - yaffs_AddrToChunk(dev,offset,&chunk,&start); + yaffs_addr_to_chunk(dev, offset, &chunk, &start); chunk++; /* OK now check for the curveball where the start and end are in * the same chunk. */ - if ((start + n) < dev->nDataBytesPerChunk) { - nToCopy = n; - } else { - nToCopy = dev->nDataBytesPerChunk - start; - } + if ((start + n) < dev->data_bytes_per_chunk) + n_copy = n; + else + n_copy = dev->data_bytes_per_chunk - start; - cache = yaffs_FindChunkCache(in, chunk); + cache = yaffs_find_chunk_cache(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 the chunk is already in the cache or it is less than + * a whole chunk or we're using inband tags then use the cache + * (if there is caching) else bypass the cache. */ - if (cache || nToCopy != dev->nDataBytesPerChunk) { - if (dev->nShortOpCaches > 0) { + if (cache || n_copy != dev->data_bytes_per_chunk || + dev->param.inband_tags) { + if (dev->param.n_caches > 0) { - /* If we can't find the data in the cache, then load it up. */ + /* If we can't find the data in the cache, + * then load it up. */ if (!cache) { - cache = yaffs_GrabChunkCache(in->myDev); + cache = + yaffs_grab_chunk_cache(in->my_dev); cache->object = in; - cache->chunkId = chunk; + cache->chunk_id = chunk; cache->dirty = 0; cache->locked = 0; - yaffs_ReadChunkDataFromObject(in, chunk, - cache-> - data); - cache->nBytes = 0; + yaffs_rd_data_obj(in, chunk, + cache->data); + cache->n_bytes = 0; } - yaffs_UseChunkCache(dev, cache, 0); + yaffs_use_cache(dev, cache, 0); cache->locked = 1; -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(buffer, &cache->data[start], nToCopy); + memcpy(buffer, &cache->data[start], n_copy); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif cache->locked = 0; } else { - /* Read into the local buffer then copy..*/ + /* Read into the local buffer then copy.. */ - __u8 *localBuffer = - yaffs_GetTempBuffer(dev, __LINE__); - yaffs_ReadChunkDataFromObject(in, chunk, - localBuffer); -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(buffer, &localBuffer[start], nToCopy); + u8 *local_buffer = + yaffs_get_temp_buffer(dev); + yaffs_rd_data_obj(in, chunk, local_buffer); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif - yaffs_ReleaseTempBuffer(dev, localBuffer, - __LINE__); - } + memcpy(buffer, &local_buffer[start], n_copy); + yaffs_release_temp_buffer(dev, local_buffer); + } } else { -#ifdef CONFIG_YAFFS_WINCE - __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); - - /* 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, localBuffer); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(buffer, localBuffer, dev->nDataBytesPerChunk); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); - yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); -#endif - -#else - /* A full chunk. Read directly into the supplied buffer. */ - yaffs_ReadChunkDataFromObject(in, chunk, buffer); -#endif + /* A full chunk. Read directly into the buffer. */ + yaffs_rd_data_obj(in, chunk, buffer); } - - n -= nToCopy; - offset += nToCopy; - buffer += nToCopy; - nDone += nToCopy; - + n -= n_copy; + offset += n_copy; + buffer += n_copy; + n_done += n_copy; } - - return nDone; + return n_done; } -int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset, - int nBytes, int writeThrough) +int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset, + int n_bytes, int write_through) { - __u32 chunk = 0; - __u32 start = 0; - int nToCopy; - int n = nBytes; - int nDone = 0; - int nToWriteBack; - int startOfWrite = offset; - int chunkWritten = 0; - int nBytesRead; + int chunk; + u32 start; + int n_copy; + int n = n_bytes; + int n_done = 0; + int n_writeback; + loff_t start_write = offset; + int chunk_written = 0; + u32 n_bytes_read; + loff_t chunk_start; + struct yaffs_dev *dev; - yaffs_Device *dev; + dev = in->my_dev; - dev = in->myDev; + while (n > 0 && chunk_written >= 0) { + yaffs_addr_to_chunk(dev, offset, &chunk, &start); - while (n > 0 && chunkWritten >= 0) { - //chunk = offset / dev->nDataBytesPerChunk + 1; - //start = offset % dev->nDataBytesPerChunk; - yaffs_AddrToChunk(dev,offset,&chunk,&start); - chunk++; + if (((loff_t)chunk) * + dev->data_bytes_per_chunk + start != offset || + start >= dev->data_bytes_per_chunk) { + yaffs_trace(YAFFS_TRACE_ERROR, + "AddrToChunk of offset %lld gives chunk %d start %d", + offset, chunk, start); + } + chunk++; /* File pos to chunk in file offset */ /* OK now check for the curveball where the start and end are in * the same chunk. */ - if ((start + n) < dev->nDataBytesPerChunk) { - nToCopy = n; + if ((start + n) < dev->data_bytes_per_chunk) { + n_copy = 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. + /* Now 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) * dev->nDataBytesPerChunk); + chunk_start = (((loff_t)(chunk - 1)) * + dev->data_bytes_per_chunk); - if (nBytesRead > dev->nDataBytesPerChunk) { - nBytesRead = dev->nDataBytesPerChunk; - } + if (chunk_start > in->variant.file_variant.file_size) + n_bytes_read = 0; /* Past end of file */ + else + n_bytes_read = + in->variant.file_variant.file_size - + chunk_start; + + if (n_bytes_read > dev->data_bytes_per_chunk) + n_bytes_read = dev->data_bytes_per_chunk; - nToWriteBack = - (nBytesRead > - (start + n)) ? nBytesRead : (start + n); + n_writeback = + (n_bytes_read > + (start + n)) ? n_bytes_read : (start + n); + + if (n_writeback < 0 || + n_writeback > dev->data_bytes_per_chunk) + BUG(); } else { - nToCopy = dev->nDataBytesPerChunk - start; - nToWriteBack = dev->nDataBytesPerChunk; + n_copy = dev->data_bytes_per_chunk - start; + n_writeback = dev->data_bytes_per_chunk; } - if (nToCopy != dev->nDataBytesPerChunk) { - /* An incomplete start or end chunk (or maybe both start and end chunk) */ - if (dev->nShortOpCaches > 0) { - yaffs_ChunkCache *cache; - /* If we can't find the data in the cache, then load the cache */ - cache = yaffs_FindChunkCache(in, chunk); + if (n_copy != dev->data_bytes_per_chunk || + dev->param.inband_tags) { + /* An incomplete start or end chunk (or maybe both + * start and end chunk), or we're using inband tags, + * so we want to use the cache buffers. + */ + if (dev->param.n_caches > 0) { + struct yaffs_cache *cache; + + /* If we can't find the data in the cache, then + * load the cache */ + cache = yaffs_find_chunk_cache(in, chunk); - if (!cache - && yaffs_CheckSpaceForAllocation(in-> - myDev)) { - cache = yaffs_GrabChunkCache(in->myDev); + if (!cache && + yaffs_check_alloc_available(dev, 1)) { + cache = yaffs_grab_chunk_cache(dev); cache->object = in; - cache->chunkId = chunk; + cache->chunk_id = chunk; cache->dirty = 0; cache->locked = 0; - yaffs_ReadChunkDataFromObject(in, chunk, - cache-> - data); - } - else if(cache && - !cache->dirty && - !yaffs_CheckSpaceForAllocation(in->myDev)){ - /* Drop the cache if it was a read cache item and - * no space check has been made for it. + yaffs_rd_data_obj(in, chunk, + cache->data); + } else if (cache && + !cache->dirty && + !yaffs_check_alloc_available(dev, + 1)) { + /* Drop the cache if it was a read cache + * item and no space check has been made + * for it. */ - cache = NULL; + cache = NULL; } if (cache) { - yaffs_UseChunkCache(dev, cache, 1); + yaffs_use_cache(dev, cache, 1); cache->locked = 1; -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif memcpy(&cache->data[start], buffer, - nToCopy); + n_copy); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif cache->locked = 0; - cache->nBytes = nToWriteBack; + cache->n_bytes = n_writeback; - if (writeThrough) { - chunkWritten = - yaffs_WriteChunkDataToObject + if (write_through) { + chunk_written = + yaffs_wr_data_obj (cache->object, - cache->chunkId, - cache->data, cache->nBytes, - 1); + cache->chunk_id, + cache->data, + cache->n_bytes, 1); cache->dirty = 0; } - } else { - chunkWritten = -1; /* fail the write */ + chunk_written = -1; /* fail 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. + /* An incomplete start or end chunk (or maybe + * both start and end chunk). Read into the + * local buffer then copy over and write back. */ - __u8 *localBuffer = - yaffs_GetTempBuffer(dev, __LINE__); + u8 *local_buffer = yaffs_get_temp_buffer(dev); - yaffs_ReadChunkDataFromObject(in, chunk, - localBuffer); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif + yaffs_rd_data_obj(in, chunk, local_buffer); + memcpy(&local_buffer[start], buffer, n_copy); - memcpy(&localBuffer[start], buffer, nToCopy); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif - chunkWritten = - yaffs_WriteChunkDataToObject(in, chunk, - localBuffer, - nToWriteBack, - 0); - - yaffs_ReleaseTempBuffer(dev, localBuffer, - __LINE__); + chunk_written = + yaffs_wr_data_obj(in, chunk, + local_buffer, + n_writeback, 0); + yaffs_release_temp_buffer(dev, local_buffer); } - } else { + /* A full chunk. Write directly from the buffer. */ -#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 - */ - __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(localBuffer, buffer, dev->nDataBytesPerChunk); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif - chunkWritten = - yaffs_WriteChunkDataToObject(in, chunk, localBuffer, - dev->nDataBytesPerChunk, - 0); - yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); -#else - /* A full chunk. Write directly from the supplied buffer. */ - chunkWritten = - yaffs_WriteChunkDataToObject(in, chunk, buffer, - dev->nDataBytesPerChunk, - 0); -#endif - /* Since we've overwritten the cached data, we better invalidate it. */ - yaffs_InvalidateChunkCache(in, chunk); - } + chunk_written = + yaffs_wr_data_obj(in, chunk, buffer, + dev->data_bytes_per_chunk, 0); - if (chunkWritten >= 0) { - n -= nToCopy; - offset += nToCopy; - buffer += nToCopy; - nDone += nToCopy; + /* Since we've overwritten the cached data, + * we better invalidate it. */ + yaffs_invalidate_chunk_cache(in, chunk); } + if (chunk_written >= 0) { + n -= n_copy; + offset += n_copy; + buffer += n_copy; + n_done += n_copy; + } } /* Update file object */ - if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize) { - in->variant.fileVariant.fileSize = (startOfWrite + nDone); - } + if ((start_write + n_done) > in->variant.file_variant.file_size) + in->variant.file_variant.file_size = (start_write + n_done); in->dirty = 1; - - return nDone; + return n_done; } +int yaffs_wr_file(struct yaffs_obj *in, const u8 *buffer, loff_t offset, + int n_bytes, int write_through) +{ + yaffs2_handle_hole(in, offset); + return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_through); +} /* ---------------------- File resizing stuff ------------------ */ -static void yaffs_PruneResizedChunks(yaffs_Object * in, int newSize) +static void yaffs_prune_chunks(struct yaffs_obj *in, loff_t new_size) { - yaffs_Device *dev = in->myDev; - int oldFileSize = in->variant.fileVariant.fileSize; + struct yaffs_dev *dev = in->my_dev; + loff_t old_size = in->variant.file_variant.file_size; + int i; + int chunk_id; + u32 dummy; + int last_del; + int start_del; - int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk; + if (old_size > 0) + yaffs_addr_to_chunk(dev, old_size - 1, &last_del, &dummy); + else + last_del = 0; - int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) / - dev->nDataBytesPerChunk; - int i; - int chunkId; + yaffs_addr_to_chunk(dev, new_size + dev->data_bytes_per_chunk - 1, + &start_del, &dummy); + last_del++; + start_del++; /* 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--) { + for (i = last_del; i >= start_del; i--) { /* NB this could be optimised somewhat, * eg. could retrieve the tags and write them without - * using yaffs_DeleteChunk + * using yaffs_chunk_del */ - chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL); - if (chunkId > 0) { - if (chunkId < - (dev->internalStartBlock * dev->nChunksPerBlock) - || chunkId >= - ((dev->internalEndBlock + - 1) * dev->nChunksPerBlock)) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("Found daft chunkId %d for %d" TENDSTR), - chunkId, i)); - } else { - in->nDataChunks--; - yaffs_DeleteChunk(dev, chunkId, 1, __LINE__); - } + chunk_id = yaffs_find_del_file_chunk(in, i, NULL); + + if (chunk_id < 1) + continue; + + if (chunk_id < + (dev->internal_start_block * dev->param.chunks_per_block) || + chunk_id >= + ((dev->internal_end_block + 1) * + dev->param.chunks_per_block)) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Found daft chunk_id %d for %d", + chunk_id, i); + } else { + in->n_data_chunks--; + yaffs_chunk_del(dev, chunk_id, 1, __LINE__); } } - } -int yaffs_ResizeFile(yaffs_Object * in, loff_t newSize) +void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size) { + int new_full; + u32 new_partial; + struct yaffs_dev *dev = obj->my_dev; - int oldFileSize = in->variant.fileVariant.fileSize; - __u32 newSizeOfPartialChunk = 0; - __u32 newFullChunks = 0; + yaffs_addr_to_chunk(dev, new_size, &new_full, &new_partial); - yaffs_Device *dev = in->myDev; + yaffs_prune_chunks(obj, new_size); - yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk); + if (new_partial != 0) { + int last_chunk = 1 + new_full; + u8 *local_buffer = yaffs_get_temp_buffer(dev); - yaffs_FlushFilesChunkCache(in); - yaffs_InvalidateWholeChunkCache(in); + /* Rewrite the last chunk with its new size and zero pad */ + yaffs_rd_data_obj(obj, last_chunk, local_buffer); + memset(local_buffer + new_partial, 0, + dev->data_bytes_per_chunk - new_partial); - yaffs_CheckGarbageCollection(dev); - - if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { - return yaffs_GetFileSize(in); - } + yaffs_wr_data_obj(obj, last_chunk, local_buffer, + new_partial, 1); - if (newSize == oldFileSize) { - return oldFileSize; + yaffs_release_temp_buffer(dev, local_buffer); } - if (newSize < oldFileSize) { + obj->variant.file_variant.file_size = new_size; - yaffs_PruneResizedChunks(in, newSize); - - if (newSizeOfPartialChunk != 0) { - int lastChunk = 1 + newFullChunks; - - __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); + yaffs_prune_tree(dev, &obj->variant.file_variant); +} - /* Got to read and rewrite the last chunk with its new size and zero pad */ - yaffs_ReadChunkDataFromObject(in, lastChunk, - localBuffer); +int yaffs_resize_file(struct yaffs_obj *in, loff_t new_size) +{ + struct yaffs_dev *dev = in->my_dev; + loff_t old_size = in->variant.file_variant.file_size; - memset(localBuffer + newSizeOfPartialChunk, 0, - dev->nDataBytesPerChunk - newSizeOfPartialChunk); + yaffs_flush_file_cache(in); + yaffs_invalidate_whole_cache(in); - yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer, - newSizeOfPartialChunk, 1); + yaffs_check_gc(dev, 0); - yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); - } + if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) + return YAFFS_FAIL; - in->variant.fileVariant.fileSize = newSize; + if (new_size == old_size) + return YAFFS_OK; - yaffs_PruneFileStructure(dev, &in->variant.fileVariant); + if (new_size > old_size) { + yaffs2_handle_hole(in, new_size); + in->variant.file_variant.file_size = new_size; } else { - /* newsSize > oldFileSize */ - in->variant.fileVariant.fileSize = newSize; + /* new_size < old_size */ + yaffs_resize_file_down(in, new_size); } - - - /* Write a new object header. + /* Write a new object header to reflect the resize. * show we've shrunk the file, if need be - * Do this only if the file is not in the deleted directories. + * Do this only if the file is not in the deleted directories + * and is not shadowed. */ - if (in->parent->objectId != YAFFS_OBJECTID_UNLINKED && - in->parent->objectId != YAFFS_OBJECTID_DELETED) { - yaffs_UpdateObjectHeader(in, NULL, 0, - (newSize < oldFileSize) ? 1 : 0, 0); - } + if (in->parent && + !in->is_shadowed && + in->parent->obj_id != YAFFS_OBJECTID_UNLINKED && + in->parent->obj_id != YAFFS_OBJECTID_DELETED) + yaffs_update_oh(in, NULL, 0, 0, 0, NULL); return YAFFS_OK; } -loff_t yaffs_GetFileSize(yaffs_Object * obj) +int yaffs_flush_file(struct yaffs_obj *in, int update_time, int data_sync) { - obj = yaffs_GetEquivalentObject(obj); - - switch (obj->variantType) { - case YAFFS_OBJECT_TYPE_FILE: - return obj->variant.fileVariant.fileSize; - case YAFFS_OBJECT_TYPE_SYMLINK: - return yaffs_strlen(obj->variant.symLinkVariant.alias); - default: - return 0; - } -} - - - -int yaffs_FlushFile(yaffs_Object * in, int updateTime) -{ - int retVal; - if (in->dirty) { - yaffs_FlushFilesChunkCache(in); - if (updateTime) { -#ifdef CONFIG_YAFFS_WINCE - yfsd_WinFileTimeNow(in->win_mtime); -#else - - in->yst_mtime = Y_CURRENT_TIME; + if (!in->dirty) + return YAFFS_OK; -#endif - } + yaffs_flush_file_cache(in); - retVal = - (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >= - 0) ? YAFFS_OK : YAFFS_FAIL; - } else { - retVal = YAFFS_OK; - } + if (data_sync) + return YAFFS_OK; - return retVal; + if (update_time) + yaffs_load_current_time(in, 0, 0); + return (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >= 0) ? + YAFFS_OK : YAFFS_FAIL; } -static int yaffs_DoGenericObjectDeletion(yaffs_Object * in) -{ - /* First off, invalidate the file's data in the cache, without flushing. */ - yaffs_InvalidateWholeChunkCache(in); - - if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) { - /* Move to the unlinked directory so we have a record that it was deleted. */ - yaffs_ChangeObjectName(in, in->myDev->deletedDir,"deleted", 0, 0); - - } - - yaffs_RemoveObjectFromDirectory(in); - yaffs_DeleteChunk(in->myDev, in->chunkId, 1, __LINE__); - in->chunkId = -1; - - yaffs_FreeObject(in); - return YAFFS_OK; - -} - -/* yaffs_DeleteFile deletes the whole file data +/* yaffs_del_file 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_UnlinkFile(yaffs_Object * in) +static int yaffs_unlink_file_if_needed(struct yaffs_obj *in) { + int ret_val; + int del_now = 0; + struct yaffs_dev *dev = in->my_dev; - int retVal; - int immediateDeletion = 0; - - if (1) { -/* XXX U-BOOT XXX */ -#if 0 -#ifdef __KERNEL__ - if (!in->myInode) { - immediateDeletion = 1; - - } -#endif -#else - if (in->inUse <= 0) { - immediateDeletion = 1; - - } -#endif - if (immediateDeletion) { - retVal = - yaffs_ChangeObjectName(in, in->myDev->deletedDir, - "deleted", 0, 0); - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: immediate deletion of file %d" TENDSTR), - in->objectId)); - in->deleted = 1; - in->myDev->nDeletedFiles++; - if (0 && in->myDev->isYaffs2) { - yaffs_ResizeFile(in, 0); - } - yaffs_SoftDeleteFile(in); - } else { - retVal = - yaffs_ChangeObjectName(in, in->myDev->unlinkedDir, - "unlinked", 0, 0); - } + if (!in->my_inode) + del_now = 1; + if (del_now) { + ret_val = + yaffs_change_obj_name(in, in->my_dev->del_dir, + _Y("deleted"), 0, 0); + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: immediate deletion of file %d", + in->obj_id); + in->deleted = 1; + in->my_dev->n_deleted_files++; + if (dev->param.disable_soft_del || dev->param.is_yaffs2) + yaffs_resize_file(in, 0); + yaffs_soft_del_file(in); + } else { + ret_val = + yaffs_change_obj_name(in, in->my_dev->unlinked_dir, + _Y("unlinked"), 0, 0); } - return retVal; + return ret_val; } -int yaffs_DeleteFile(yaffs_Object * in) +int yaffs_del_file(struct yaffs_obj *in) { - int retVal = YAFFS_OK; + int ret_val = YAFFS_OK; + int deleted; /* Need to cache value on stack if in is freed */ + struct yaffs_dev *dev = in->my_dev; - if (in->nDataChunks > 0) { - /* Use soft deletion if there is data in the file */ - if (!in->unlinked) { - retVal = yaffs_UnlinkFile(in); - } - if (retVal == YAFFS_OK && in->unlinked && !in->deleted) { + if (dev->param.disable_soft_del || dev->param.is_yaffs2) + yaffs_resize_file(in, 0); + + if (in->n_data_chunks > 0) { + /* Use soft deletion if there is data in the file. + * That won't be the case if it has been resized to zero. + */ + if (!in->unlinked) + ret_val = yaffs_unlink_file_if_needed(in); + + deleted = in->deleted; + + if (ret_val == YAFFS_OK && in->unlinked && !in->deleted) { in->deleted = 1; - in->myDev->nDeletedFiles++; - yaffs_SoftDeleteFile(in); + deleted = 1; + in->my_dev->n_deleted_files++; + yaffs_soft_del_file(in); } - return in->deleted ? YAFFS_OK : YAFFS_FAIL; + return deleted ? YAFFS_OK : YAFFS_FAIL; } else { /* The file has no data chunks so we toss it immediately */ - yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top); - in->variant.fileVariant.top = NULL; - yaffs_DoGenericObjectDeletion(in); + yaffs_free_tnode(in->my_dev, in->variant.file_variant.top); + in->variant.file_variant.top = NULL; + yaffs_generic_obj_del(in); return YAFFS_OK; } } -static int yaffs_DeleteDirectory(yaffs_Object * in) +int yaffs_is_non_empty_dir(struct yaffs_obj *obj) { - /* First check that the directory is empty. */ - if (list_empty(&in->variant.directoryVariant.children)) { - return yaffs_DoGenericObjectDeletion(in); - } + return (obj && + obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) && + !(list_empty(&obj->variant.dir_variant.children)); +} - return YAFFS_FAIL; +static int yaffs_del_dir(struct yaffs_obj *obj) +{ + /* First check that the directory is empty. */ + if (yaffs_is_non_empty_dir(obj)) + return YAFFS_FAIL; + return yaffs_generic_obj_del(obj); } -static int yaffs_DeleteSymLink(yaffs_Object * in) +static int yaffs_del_symlink(struct yaffs_obj *in) { - YFREE(in->variant.symLinkVariant.alias); + kfree(in->variant.symlink_variant.alias); + in->variant.symlink_variant.alias = NULL; - return yaffs_DoGenericObjectDeletion(in); + return yaffs_generic_obj_del(in); } -static int yaffs_DeleteHardLink(yaffs_Object * in) +static int yaffs_del_link(struct yaffs_obj *in) { - /* remove this hardlink from the list assocaited with the equivalent + /* remove this hardlink from the list associated with the equivalent * object */ - list_del(&in->hardLinks); - return yaffs_DoGenericObjectDeletion(in); + list_del_init(&in->hard_links); + return yaffs_generic_obj_del(in); } -static void yaffs_DestroyObject(yaffs_Object * obj) +int yaffs_del_obj(struct yaffs_obj *obj) { - switch (obj->variantType) { + int ret_val = -1; + + switch (obj->variant_type) { case YAFFS_OBJECT_TYPE_FILE: - yaffs_DeleteFile(obj); + ret_val = yaffs_del_file(obj); break; case YAFFS_OBJECT_TYPE_DIRECTORY: - yaffs_DeleteDirectory(obj); + if (!list_empty(&obj->variant.dir_variant.dirty)) { + yaffs_trace(YAFFS_TRACE_BACKGROUND, + "Remove object %d from dirty directories", + obj->obj_id); + list_del_init(&obj->variant.dir_variant.dirty); + } + return yaffs_del_dir(obj); break; case YAFFS_OBJECT_TYPE_SYMLINK: - yaffs_DeleteSymLink(obj); + ret_val = yaffs_del_symlink(obj); break; case YAFFS_OBJECT_TYPE_HARDLINK: - yaffs_DeleteHardLink(obj); + ret_val = yaffs_del_link(obj); break; case YAFFS_OBJECT_TYPE_SPECIAL: - yaffs_DoGenericObjectDeletion(obj); + ret_val = yaffs_generic_obj_del(obj); break; case YAFFS_OBJECT_TYPE_UNKNOWN: + ret_val = 0; break; /* should not happen. */ } + return ret_val; } -static int yaffs_UnlinkWorker(yaffs_Object * obj) +static int yaffs_unlink_worker(struct yaffs_obj *obj) { + int del_now = 0; + + if (!obj) + return YAFFS_FAIL; + + if (!obj->my_inode) + del_now = 1; + + yaffs_update_parent(obj->parent); - if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { - return yaffs_DeleteHardLink(obj); - } else if (!list_empty(&obj->hardLinks)) { + if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { + return yaffs_del_link(obj); + } else if (!list_empty(&obj->hard_links)) { /* Curve ball: We're unlinking an object that has a hardlink. * * This problem arises because we are not strictly following @@ -5072,1638 +3985,532 @@ static int yaffs_UnlinkWorker(yaffs_Object * obj) * Instead, we do the following: * - Select a hardlink. * - Unhook it from the hard links - * - Unhook it from its parent directory (so that the rename can work) + * - Move it from its parent directory so that the rename works. * - Rename the object to the hardlink's name. * - Delete the hardlink */ - yaffs_Object *hl; - int retVal; + struct yaffs_obj *hl; + struct yaffs_obj *parent; + int ret_val; YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; - hl = list_entry(obj->hardLinks.next, yaffs_Object, hardLinks); + hl = list_entry(obj->hard_links.next, struct yaffs_obj, + hard_links); - list_del_init(&hl->hardLinks); - list_del_init(&hl->siblings); + yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1); + parent = hl->parent; - yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1); + list_del_init(&hl->hard_links); - retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0); + yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl); - if (retVal == YAFFS_OK) { - retVal = yaffs_DoGenericObjectDeletion(hl); - } - return retVal; + ret_val = yaffs_change_obj_name(obj, parent, name, 0, 0); - } else { - switch (obj->variantType) { + if (ret_val == YAFFS_OK) + ret_val = yaffs_generic_obj_del(hl); + + return ret_val; + + } else if (del_now) { + switch (obj->variant_type) { case YAFFS_OBJECT_TYPE_FILE: - return yaffs_UnlinkFile(obj); + return yaffs_del_file(obj); break; case YAFFS_OBJECT_TYPE_DIRECTORY: - return yaffs_DeleteDirectory(obj); + list_del_init(&obj->variant.dir_variant.dirty); + return yaffs_del_dir(obj); break; case YAFFS_OBJECT_TYPE_SYMLINK: - return yaffs_DeleteSymLink(obj); + return yaffs_del_symlink(obj); break; case YAFFS_OBJECT_TYPE_SPECIAL: - return yaffs_DoGenericObjectDeletion(obj); + return yaffs_generic_obj_del(obj); break; case YAFFS_OBJECT_TYPE_HARDLINK: case YAFFS_OBJECT_TYPE_UNKNOWN: default: return YAFFS_FAIL; } + } else if (yaffs_is_non_empty_dir(obj)) { + return YAFFS_FAIL; + } else { + return yaffs_change_obj_name(obj, obj->my_dev->unlinked_dir, + _Y("unlinked"), 0, 0); } } - -static int yaffs_UnlinkObject( yaffs_Object *obj) +static int yaffs_unlink_obj(struct yaffs_obj *obj) { - - if (obj && obj->unlinkAllowed) { - return yaffs_UnlinkWorker(obj); - } + if (obj && obj->unlink_allowed) + return yaffs_unlink_worker(obj); return YAFFS_FAIL; +} + +int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR *name) +{ + struct yaffs_obj *obj; + obj = yaffs_find_by_name(dir, name); + return yaffs_unlink_obj(obj); } -int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name) + +/* Note: + * If old_name is NULL then we take old_dir as the object to be renamed. + */ +int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR *old_name, + struct yaffs_obj *new_dir, const YCHAR *new_name) { - yaffs_Object *obj; + struct yaffs_obj *obj = NULL; + struct yaffs_obj *existing_target = NULL; + int force = 0; + int result; + struct yaffs_dev *dev; + + if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + BUG(); + return YAFFS_FAIL; + } + if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + BUG(); + return YAFFS_FAIL; + } + + dev = old_dir->my_dev; + +#ifdef CONFIG_YAFFS_CASE_INSENSITIVE + /* Special case for case insemsitive systems. + * While look-up is case insensitive, the name isn't. + * Therefore we might want to change x.txt to X.txt + */ + if (old_dir == new_dir && + old_name && new_name && + yaffs_strcmp(old_name, new_name) == 0) + force = 1; +#endif + + if (yaffs_strnlen(new_name, YAFFS_MAX_NAME_LENGTH + 1) > + YAFFS_MAX_NAME_LENGTH) + /* ENAMETOOLONG */ + return YAFFS_FAIL; - obj = yaffs_FindObjectByName(dir, name); - return yaffs_UnlinkObject(obj); + if (old_name) + obj = yaffs_find_by_name(old_dir, old_name); + else{ + obj = old_dir; + old_dir = obj->parent; + } + + if (obj && obj->rename_allowed) { + /* Now handle an existing target, if there is one */ + existing_target = yaffs_find_by_name(new_dir, new_name); + if (yaffs_is_non_empty_dir(existing_target)) { + return YAFFS_FAIL; /* ENOTEMPTY */ + } else if (existing_target && existing_target != obj) { + /* Nuke the target first, using shadowing, + * but only if it isn't the same object. + * + * Note we must disable gc here otherwise it can mess + * up the shadowing. + * + */ + dev->gc_disable = 1; + yaffs_change_obj_name(obj, new_dir, new_name, force, + existing_target->obj_id); + existing_target->is_shadowed = 1; + yaffs_unlink_obj(existing_target); + dev->gc_disable = 0; + } + + result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0); + + yaffs_update_parent(old_dir); + if (new_dir != old_dir) + yaffs_update_parent(new_dir); + + return result; + } + return YAFFS_FAIL; } /*----------------------- Initialisation Scanning ---------------------- */ -static void yaffs_HandleShadowedObject(yaffs_Device * dev, int objId, - int backwardScanning) +void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id, + int backward_scanning) { - yaffs_Object *obj; - - if (!backwardScanning) { - /* Handle YAFFS1 forward scanning case - * For YAFFS1 we always do the deletion - */ + struct yaffs_obj *obj; - } else { + if (backward_scanning) { /* Handle YAFFS2 case (backward scanning) * If the shadowed object exists then ignore. */ - if (yaffs_FindObjectByNumber(dev, objId)) { + obj = yaffs_find_by_number(dev, obj_id); + if (obj) return; - } } - /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc. + /* Let's create it (if it does not exist) assuming it is a file so that + * it can do shrinking etc. * We put it in unlinked dir to be cleaned up after the scanning */ obj = - yaffs_FindOrCreateObjectByNumber(dev, objId, - YAFFS_OBJECT_TYPE_FILE); - yaffs_AddObjectToDirectory(dev->unlinkedDir, obj); - obj->variant.fileVariant.shrinkSize = 0; - obj->valid = 1; /* So that we don't read any other info for this file */ - + yaffs_find_or_create_by_number(dev, obj_id, YAFFS_OBJECT_TYPE_FILE); + if (!obj) + return; + obj->is_shadowed = 1; + yaffs_add_obj_to_dir(dev->unlinked_dir, obj); + obj->variant.file_variant.shrink_size = 0; + obj->valid = 1; /* So that we don't read any other info. */ } -typedef struct { - int seq; - int block; -} yaffs_BlockIndex; - - -static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList) +void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list) { - yaffs_Object *hl; - yaffs_Object *in; - - while (hardList) { - hl = hardList; - hardList = (yaffs_Object *) (hardList->hardLinks.next); + struct list_head *lh; + struct list_head *save; + struct yaffs_obj *hl; + struct yaffs_obj *in; - in = yaffs_FindObjectByNumber(dev, - hl->variant.hardLinkVariant. - equivalentObjectId); + list_for_each_safe(lh, save, hard_list) { + hl = list_entry(lh, struct yaffs_obj, hard_links); + in = yaffs_find_by_number(dev, + hl->variant.hardlink_variant.equiv_id); if (in) { /* Add the hardlink pointers */ - hl->variant.hardLinkVariant.equivalentObject = in; - list_add(&hl->hardLinks, &in->hardLinks); + hl->variant.hardlink_variant.equiv_obj = in; + list_add(&hl->hard_links, &in->hard_links); } else { /* Todo Need to report/handle this better. * Got a problem... hardlink to a non-existant object */ - hl->variant.hardLinkVariant.equivalentObject = NULL; - INIT_LIST_HEAD(&hl->hardLinks); - + hl->variant.hardlink_variant.equiv_obj = NULL; + INIT_LIST_HEAD(&hl->hard_links); } - } - -} - - - - - -static int ybicmp(const void *a, const void *b){ - register int aseq = ((yaffs_BlockIndex *)a)->seq; - register int bseq = ((yaffs_BlockIndex *)b)->seq; - register int ablock = ((yaffs_BlockIndex *)a)->block; - register int bblock = ((yaffs_BlockIndex *)b)->block; - if( aseq == bseq ) - return ablock - bblock; - else - return aseq - bseq; - } -static int yaffs_Scan(yaffs_Device * dev) +static void yaffs_strip_deleted_objs(struct yaffs_dev *dev) { - yaffs_ExtendedTags tags; - int blk; - int blockIterator; - int startIterator; - int endIterator; - int nBlocksToScan = 0; - - int chunk; - int c; - int deleted; - yaffs_BlockState state; - yaffs_Object *hardList = NULL; - yaffs_BlockInfo *bi; - int sequenceNumber; - yaffs_ObjectHeader *oh; - yaffs_Object *in; - yaffs_Object *parent; - int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; - - int alloc_failed = 0; - - - __u8 *chunkData; - - yaffs_BlockIndex *blockIndex = NULL; - - if (dev->isYaffs2) { - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_Scan is not for YAFFS2!" TENDSTR))); - return YAFFS_FAIL; - } - - //TODO Throw all the yaffs2 stuuf out of yaffs_Scan since it is only for yaffs1 format. - - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR), - dev->internalStartBlock, dev->internalEndBlock)); - - chunkData = yaffs_GetTempBuffer(dev, __LINE__); - - dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; - - if (dev->isYaffs2) { - blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex)); - if(!blockIndex) - return YAFFS_FAIL; - } - - /* Scan all the blocks to determine their state */ - for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { - bi = yaffs_GetBlockInfo(dev, blk); - yaffs_ClearChunkBits(dev, blk); - bi->pagesInUse = 0; - bi->softDeletions = 0; - - yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber); - - bi->blockState = state; - bi->sequenceNumber = sequenceNumber; - - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, - state, sequenceNumber)); - - if (state == YAFFS_BLOCK_STATE_DEAD) { - T(YAFFS_TRACE_BAD_BLOCKS, - (TSTR("block %d is bad" TENDSTR), blk)); - } else if (state == YAFFS_BLOCK_STATE_EMPTY) { - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block empty " TENDSTR))); - dev->nErasedBlocks++; - dev->nFreeChunks += dev->nChunksPerBlock; - } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - - /* Determine the highest sequence number */ - if (dev->isYaffs2 && - sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER && - sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) { - - blockIndex[nBlocksToScan].seq = sequenceNumber; - blockIndex[nBlocksToScan].block = blk; - - nBlocksToScan++; - - if (sequenceNumber >= dev->sequenceNumber) { - dev->sequenceNumber = sequenceNumber; - } - } else if (dev->isYaffs2) { - /* TODO: Nasty sequence number! */ - T(YAFFS_TRACE_SCAN, - (TSTR - ("Block scanning block %d has bad sequence number %d" - TENDSTR), blk, sequenceNumber)); - - } - } - } - - /* Sort the blocks - * Dungy old bubble sort for now... - */ - if (dev->isYaffs2) { - yaffs_BlockIndex temp; - int i; - int j; - - for (i = 0; i < nBlocksToScan; i++) - for (j = i + 1; j < nBlocksToScan; j++) - if (blockIndex[i].seq > blockIndex[j].seq) { - temp = blockIndex[j]; - blockIndex[j] = blockIndex[i]; - blockIndex[i] = temp; - } - } - - /* Now scan the blocks looking at the data. */ - if (dev->isYaffs2) { - startIterator = 0; - endIterator = nBlocksToScan - 1; - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan)); - } else { - startIterator = dev->internalStartBlock; - endIterator = dev->internalEndBlock; - } - - /* For each block.... */ - for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator; - blockIterator++) { - - if (dev->isYaffs2) { - /* get the block to scan in the correct order */ - blk = blockIndex[blockIterator].block; - } else { - blk = blockIterator; - } - - bi = yaffs_GetBlockInfo(dev, blk); - state = bi->blockState; - - deleted = 0; - - /* For each chunk in each block that needs scanning....*/ - for (c = 0; !alloc_failed && c < dev->nChunksPerBlock && - state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) { - /* Read the tags and decide what to do */ - chunk = blk * dev->nChunksPerBlock + c; - - yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL, - &tags); - - /* Let's have a good look at this chunk... */ - - if (!dev->isYaffs2 && tags.chunkDeleted) { - /* YAFFS1 only... - * A deleted chunk - */ - deleted++; - dev->nFreeChunks++; - /*T((" %d %d deleted\n",blk,c)); */ - } else if (!tags.chunkUsed) { - /* An unassigned chunk in the block - * This means that either the block is empty or - * this is the one being allocated from - */ - - if (c == 0) { - /* We're looking at the first chunk in the block so the block is unused */ - state = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - } else { - /* this is the block being allocated from */ - T(YAFFS_TRACE_SCAN, - (TSTR - (" Allocating from %d %d" TENDSTR), - blk, c)); - state = YAFFS_BLOCK_STATE_ALLOCATING; - dev->allocationBlock = blk; - dev->allocationPage = c; - dev->allocationBlockFinder = blk; - /* Set it to here to encourage the allocator to go forth from here. */ - - /* Yaffs2 sanity check: - * This should be the one with the highest sequence number - */ - if (dev->isYaffs2 - && (dev->sequenceNumber != - bi->sequenceNumber)) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs: Allocation block %d was not highest sequence id:" - " block seq = %d, dev seq = %d" - TENDSTR), blk,bi->sequenceNumber,dev->sequenceNumber)); - } - } - - dev->nFreeChunks += (dev->nChunksPerBlock - c); - } else if (tags.chunkId > 0) { - /* chunkId > 0 so it is a data chunk... */ - unsigned int endpos; - - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - in = yaffs_FindOrCreateObjectByNumber(dev, - tags. - objectId, - YAFFS_OBJECT_TYPE_FILE); - /* PutChunkIntoFile checks for a clash (two data chunks with - * the same chunkId). - */ - - if(!in) - alloc_failed = 1; - - if(in){ - if(!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk,1)) - alloc_failed = 1; - } - - endpos = - (tags.chunkId - 1) * dev->nDataBytesPerChunk + - tags.byteCount; - if (in && - in->variantType == YAFFS_OBJECT_TYPE_FILE - && in->variant.fileVariant.scannedFileSize < - endpos) { - in->variant.fileVariant. - scannedFileSize = endpos; - if (!dev->useHeaderFileSize) { - in->variant.fileVariant. - fileSize = - in->variant.fileVariant. - scannedFileSize; - } - - } - /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */ - } else { - /* chunkId == 0, so it is an ObjectHeader. - * Thus, we read in the object header and make the object - */ - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - yaffs_ReadChunkWithTagsFromNAND(dev, chunk, - chunkData, - NULL); - - oh = (yaffs_ObjectHeader *) chunkData; - - in = yaffs_FindObjectByNumber(dev, - tags.objectId); - if (in && in->variantType != oh->type) { - /* This should not happen, but somehow - * Wev'e ended up with an objectId that has been reused but not yet - * deleted, and worse still it has changed type. Delete the old object. - */ - - yaffs_DestroyObject(in); - - in = 0; - } - - in = yaffs_FindOrCreateObjectByNumber(dev, - tags. - objectId, - oh->type); - - if(!in) - alloc_failed = 1; - - if (in && oh->shadowsObject > 0) { - yaffs_HandleShadowedObject(dev, - oh-> - shadowsObject, - 0); - } - - if (in && in->valid) { - /* We have already filled this one. We have a duplicate and need to resolve it. */ - - unsigned existingSerial = in->serial; - unsigned newSerial = tags.serialNumber; - - if (dev->isYaffs2 || - ((existingSerial + 1) & 3) == - newSerial) { - /* Use new one - destroy the exisiting one */ - yaffs_DeleteChunk(dev, - in->chunkId, - 1, __LINE__); - in->valid = 0; - } else { - /* Use existing - destroy this one. */ - yaffs_DeleteChunk(dev, chunk, 1, - __LINE__); - } - } - - if (in && !in->valid && - (tags.objectId == YAFFS_OBJECTID_ROOT || - tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) { - /* We only load some info, don't fiddle with directory structure */ - in->valid = 1; - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; -#endif - in->chunkId = chunk; - - } else if (in && !in->valid) { - /* we need to load this info */ - - in->valid = 1; - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; -#endif - in->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) { - /* 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 - */ - - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: attempting to use non-directory as" - " a directory in scan. Put in lost+found." - TENDSTR))); - parent = dev->lostNFoundDir; - } - - yaffs_AddObjectToDirectory(parent, in); - - if (0 && (parent == dev->deletedDir || - parent == dev->unlinkedDir)) { - in->deleted = 1; /* If it is unlinked at start up then it wants deleting */ - dev->nDeletedFiles++; - } - /* Note re hardlinks. - * Since we might scan a hardlink before its equivalent object is scanned - * we put them all in a list. - * After scanning is complete, we should have all the objects, so we run through this - * list and fix up all the chains. - */ - - switch (in->variantType) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Todo got a problem */ - break; - case YAFFS_OBJECT_TYPE_FILE: - if (dev->isYaffs2 - && oh->isShrink) { - /* Prune back the shrunken chunks */ - yaffs_PruneResizedChunks - (in, oh->fileSize); - /* Mark the block as having a shrinkHeader */ - bi->hasShrinkHeader = 1; - } - - if (dev->useHeaderFileSize) - - in->variant.fileVariant. - fileSize = - oh->fileSize; - - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - in->variant.hardLinkVariant. - equivalentObjectId = - oh->equivalentObjectId; - in->hardLinks.next = - (struct list_head *) - hardList; - hardList = in; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symLinkVariant.alias = - yaffs_CloneString(oh->alias); - if(!in->variant.symLinkVariant.alias) - alloc_failed = 1; - break; - } - - if (parent == dev->deletedDir) { - yaffs_DestroyObject(in); - bi->hasShrinkHeader = 1; - } - } - } - } - - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - /* If we got this far while scanning, then the block is fully allocated.*/ - state = YAFFS_BLOCK_STATE_FULL; - } - - bi->blockState = state; - - /* Now let's see if it was dirty */ - if (bi->pagesInUse == 0 && - !bi->hasShrinkHeader && - bi->blockState == YAFFS_BLOCK_STATE_FULL) { - yaffs_BlockBecameDirty(dev, blk); - } - - } - - if (blockIndex) { - YFREE(blockIndex); - } - - - /* Ok, we've done all the scanning. - * Fix up the hard link chains. - * We should now have scanned all the objects, now it's time to add these - * hardlinks. + /* + * Sort out state of unlinked and deleted objects after scanning. */ + struct list_head *i; + struct list_head *n; + struct yaffs_obj *l; - yaffs_HardlinkFixup(dev,hardList); - - /* Handle the unlinked files. Since they were left in an unlinked state we should - * just delete them. - */ - { - struct list_head *i; - struct list_head *n; + if (dev->read_only) + return; - yaffs_Object *l; - /* Soft delete all the unlinked files */ - list_for_each_safe(i, n, - &dev->unlinkedDir->variant.directoryVariant. - children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - yaffs_DestroyObject(l); - } - } + /* Soft delete all the unlinked files */ + list_for_each_safe(i, n, + &dev->unlinked_dir->variant.dir_variant.children) { + l = list_entry(i, struct yaffs_obj, siblings); + yaffs_del_obj(l); } - yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); - - if(alloc_failed){ - return YAFFS_FAIL; + list_for_each_safe(i, n, &dev->del_dir->variant.dir_variant.children) { + l = list_entry(i, struct yaffs_obj, siblings); + yaffs_del_obj(l); } - - T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR))); - - - return YAFFS_OK; } -static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in) -{ - __u8 *chunkData; - yaffs_ObjectHeader *oh; - yaffs_Device *dev = in->myDev; - yaffs_ExtendedTags tags; - - if(!in) - return; - -#if 0 - T(YAFFS_TRACE_SCAN,(TSTR("details for object %d %s loaded" TENDSTR), - in->objectId, - in->lazyLoaded ? "not yet" : "already")); -#endif - - if(in->lazyLoaded){ - in->lazyLoaded = 0; - chunkData = yaffs_GetTempBuffer(dev, __LINE__); - - yaffs_ReadChunkWithTagsFromNAND(dev, in->chunkId, - chunkData, &tags); - oh = (yaffs_ObjectHeader *) chunkData; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; - -#endif - yaffs_SetObjectName(in, oh->name); - - if(in->variantType == YAFFS_OBJECT_TYPE_SYMLINK){ - in->variant.symLinkVariant.alias = - yaffs_CloneString(oh->alias); - } +/* + * This code iterates through all the objects making sure that they are rooted. + * Any unrooted objects are re-rooted in lost+found. + * An object needs to be in one of: + * - Directly under deleted, unlinked + * - Directly or indirectly under root. + * + * Note: + * This code assumes that we don't ever change the current relationships + * between directories: + * root_dir->parent == unlinked_dir->parent == del_dir->parent == NULL + * lost-n-found->parent == root_dir + * + * This fixes the problem where directories might have inadvertently been + * deleted leaving the object "hanging" without being rooted in the + * directory tree. + */ - yaffs_ReleaseTempBuffer(dev,chunkData, __LINE__); - } +static int yaffs_has_null_parent(struct yaffs_dev *dev, struct yaffs_obj *obj) +{ + return (obj == dev->del_dir || + obj == dev->unlinked_dir || obj == dev->root_dir); } -static int yaffs_ScanBackwards(yaffs_Device * dev) +static void yaffs_fix_hanging_objs(struct yaffs_dev *dev) { - yaffs_ExtendedTags tags; - int blk; - int blockIterator; - int startIterator; - int endIterator; - int nBlocksToScan = 0; - - int chunk; - int c; - yaffs_BlockState state; - yaffs_Object *hardList = NULL; - yaffs_BlockInfo *bi; - int sequenceNumber; - yaffs_ObjectHeader *oh; - yaffs_Object *in; - yaffs_Object *parent; - int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; - int itsUnlinked; - __u8 *chunkData; - - int fileSize; - int isShrink; - int foundChunksInBlock; - int equivalentObjectId; - int alloc_failed = 0; - - - yaffs_BlockIndex *blockIndex = NULL; - int altBlockIndex = 0; - - if (!dev->isYaffs2) { - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR))); - return YAFFS_FAIL; - } - - T(YAFFS_TRACE_SCAN, - (TSTR - ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..." - TENDSTR), dev->internalStartBlock, dev->internalEndBlock)); - - - dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; - - blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex)); - - if(!blockIndex) { - blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex)); - altBlockIndex = 1; - } - - if(!blockIndex) { - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR))); - return YAFFS_FAIL; - } - - dev->blocksInCheckpoint = 0; - - chunkData = yaffs_GetTempBuffer(dev, __LINE__); - - /* Scan all the blocks to determine their state */ - for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { - bi = yaffs_GetBlockInfo(dev, blk); - yaffs_ClearChunkBits(dev, blk); - bi->pagesInUse = 0; - bi->softDeletions = 0; - - yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber); - - bi->blockState = state; - bi->sequenceNumber = sequenceNumber; - - if(bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) - bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT; - - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, - state, sequenceNumber)); - - - if(state == YAFFS_BLOCK_STATE_CHECKPOINT){ - dev->blocksInCheckpoint++; - - } else if (state == YAFFS_BLOCK_STATE_DEAD) { - T(YAFFS_TRACE_BAD_BLOCKS, - (TSTR("block %d is bad" TENDSTR), blk)); - } else if (state == YAFFS_BLOCK_STATE_EMPTY) { - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block empty " TENDSTR))); - dev->nErasedBlocks++; - dev->nFreeChunks += dev->nChunksPerBlock; - } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - - /* Determine the highest sequence number */ - if (dev->isYaffs2 && - sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER && - sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) { - - blockIndex[nBlocksToScan].seq = sequenceNumber; - blockIndex[nBlocksToScan].block = blk; - - nBlocksToScan++; - - if (sequenceNumber >= dev->sequenceNumber) { - dev->sequenceNumber = sequenceNumber; - } - } else if (dev->isYaffs2) { - /* TODO: Nasty sequence number! */ - T(YAFFS_TRACE_SCAN, - (TSTR - ("Block scanning block %d has bad sequence number %d" - TENDSTR), blk, sequenceNumber)); - - } - } - } - - T(YAFFS_TRACE_SCAN, - (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan)); - - - - YYIELD(); - - /* Sort the blocks */ -#ifndef CONFIG_YAFFS_USE_OWN_SORT - { - /* Use qsort now. */ - yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp); - } -#else - { - /* Dungy old bubble sort... */ - - yaffs_BlockIndex temp; - int i; - int j; - - for (i = 0; i < nBlocksToScan; i++) - for (j = i + 1; j < nBlocksToScan; j++) - if (blockIndex[i].seq > blockIndex[j].seq) { - temp = blockIndex[j]; - blockIndex[j] = blockIndex[i]; - blockIndex[i] = temp; - } - } -#endif - - YYIELD(); - - T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR))); - - /* Now scan the blocks looking at the data. */ - startIterator = 0; - endIterator = nBlocksToScan - 1; - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan)); - - /* For each block.... backwards */ - for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator; - blockIterator--) { - /* Cooperative multitasking! This loop can run for so - long that watchdog timers expire. */ - YYIELD(); - - /* get the block to scan in the correct order */ - blk = blockIndex[blockIterator].block; - - bi = yaffs_GetBlockInfo(dev, blk); - - - state = bi->blockState; - - /* For each chunk in each block that needs scanning.... */ - foundChunksInBlock = 0; - for (c = dev->nChunksPerBlock - 1; - !alloc_failed && c >= 0 && - (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - state == YAFFS_BLOCK_STATE_ALLOCATING); c--) { - /* Scan backwards... - * Read the tags and decide what to do - */ - - chunk = blk * dev->nChunksPerBlock + c; - - yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL, - &tags); - - /* Let's have a good look at this chunk... */ - - if (!tags.chunkUsed) { - /* An unassigned chunk in the block. - * If there are used chunks after this one, then - * it is a chunk that was skipped due to failing the erased - * check. Just skip it so that it can be deleted. - * But, more typically, We get here when this is an unallocated - * chunk and his means that either the block is empty or - * this is the one being allocated from - */ - - if(foundChunksInBlock) - { - /* This is a chunk that was skipped due to failing the erased check */ - - } else if (c == 0) { - /* We're looking at the first chunk in the block so the block is unused */ - state = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - } else { - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - state == YAFFS_BLOCK_STATE_ALLOCATING) { - if(dev->sequenceNumber == bi->sequenceNumber) { - /* this is the block being allocated from */ - - T(YAFFS_TRACE_SCAN, - (TSTR - (" Allocating from %d %d" - TENDSTR), blk, c)); - - state = YAFFS_BLOCK_STATE_ALLOCATING; - dev->allocationBlock = blk; - dev->allocationPage = c; - dev->allocationBlockFinder = blk; - } - else { - /* This is a partially written block that is not - * the current allocation block. This block must have - * had a write failure, so set up for retirement. - */ - - bi->needsRetiring = 1; - bi->gcPrioritise = 1; - - T(YAFFS_TRACE_ALWAYS, - (TSTR("Partially written block %d being set for retirement" TENDSTR), - blk)); - } - - } - - } - - dev->nFreeChunks++; - - } else if (tags.chunkId > 0) { - /* chunkId > 0 so it is a data chunk... */ - unsigned int endpos; - __u32 chunkBase = - (tags.chunkId - 1) * dev->nDataBytesPerChunk; - - foundChunksInBlock = 1; - - - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - in = yaffs_FindOrCreateObjectByNumber(dev, - tags. - objectId, - YAFFS_OBJECT_TYPE_FILE); - if(!in){ - /* Out of memory */ - alloc_failed = 1; - } - - if (in && - in->variantType == YAFFS_OBJECT_TYPE_FILE - && chunkBase < - in->variant.fileVariant.shrinkSize) { - /* This has not been invalidated by a resize */ - if(!yaffs_PutChunkIntoFile(in, tags.chunkId, - chunk, -1)){ - alloc_failed = 1; - } + struct yaffs_obj *obj; + struct yaffs_obj *parent; + int i; + struct list_head *lh; + struct list_head *n; + int depth_limit; + int hanging; - /* File size is calculated by looking at the data chunks if we have not - * seen an object header yet. Stop this practice once we find an object header. - */ - endpos = - (tags.chunkId - - 1) * dev->nDataBytesPerChunk + - tags.byteCount; + if (dev->read_only) + return; - if (!in->valid && /* have not got an object header yet */ - in->variant.fileVariant. - scannedFileSize < endpos) { - in->variant.fileVariant. - scannedFileSize = endpos; - in->variant.fileVariant. - fileSize = - in->variant.fileVariant. - scannedFileSize; - } + /* Iterate through the objects in each hash entry, + * looking at each object. + * Make sure it is rooted. + */ - } else if(in) { - /* This chunk has been invalidated by a resize, so delete */ - yaffs_DeleteChunk(dev, chunk, 1, __LINE__); + for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { + list_for_each_safe(lh, n, &dev->obj_bucket[i].list) { + obj = list_entry(lh, struct yaffs_obj, hash_link); + parent = obj->parent; - } + if (yaffs_has_null_parent(dev, obj)) { + /* These directories are not hanging */ + hanging = 0; + } else if (!parent || + parent->variant_type != + YAFFS_OBJECT_TYPE_DIRECTORY) { + hanging = 1; + } else if (yaffs_has_null_parent(dev, parent)) { + hanging = 0; } else { - /* chunkId == 0, so it is an ObjectHeader. - * Thus, we read in the object header and make the object + /* + * Need to follow the parent chain to + * see if it is hanging. */ - foundChunksInBlock = 1; - - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - oh = NULL; - in = NULL; - - if (tags.extraHeaderInfoAvailable) { - in = yaffs_FindOrCreateObjectByNumber - (dev, tags.objectId, - tags.extraObjectType); - } - - if (!in || -#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD - !in->valid || -#endif - tags.extraShadows || - (!in->valid && - (tags.objectId == YAFFS_OBJECTID_ROOT || - tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) - ) { - - /* If we don't have valid info then we need to read the chunk - * TODO In future we can probably defer reading the chunk and - * living with invalid data until needed. - */ - - yaffs_ReadChunkWithTagsFromNAND(dev, - chunk, - chunkData, - NULL); - - oh = (yaffs_ObjectHeader *) chunkData; - - if (!in) - in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type); - - } - - if (!in) { - /* TODO Hoosterman we have a problem! */ - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: Could not make object for object %d " - "at chunk %d during scan" - TENDSTR), tags.objectId, chunk)); - - } - - if (in->valid) { - /* We have already filled this one. - * We have a duplicate that will be discarded, but - * we first have to suck out resize info if it is a file. - */ - - if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) && - ((oh && - oh-> type == YAFFS_OBJECT_TYPE_FILE)|| - (tags.extraHeaderInfoAvailable && - tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE)) - ) { - __u32 thisSize = - (oh) ? oh->fileSize : tags. - extraFileLength; - __u32 parentObjectId = - (oh) ? oh-> - parentObjectId : tags. - extraParentObjectId; - unsigned isShrink = - (oh) ? oh->isShrink : tags. - extraIsShrinkHeader; - - /* If it is deleted (unlinked at start also means deleted) - * we treat the file size as being zeroed at this point. - */ - if (parentObjectId == - YAFFS_OBJECTID_DELETED - || parentObjectId == - YAFFS_OBJECTID_UNLINKED) { - thisSize = 0; - isShrink = 1; - } - - if (isShrink && - in->variant.fileVariant. - shrinkSize > thisSize) { - in->variant.fileVariant. - shrinkSize = - thisSize; - } - - if (isShrink) { - bi->hasShrinkHeader = 1; - } - - } - /* Use existing - destroy this one. */ - yaffs_DeleteChunk(dev, chunk, 1, __LINE__); - - } - - if (!in->valid && - (tags.objectId == YAFFS_OBJECTID_ROOT || - tags.objectId == - YAFFS_OBJECTID_LOSTNFOUND)) { - /* We only load some info, don't fiddle with directory structure */ - in->valid = 1; - - if(oh) { - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; - -#endif - } else { - in->variantType = tags.extraObjectType; - in->lazyLoaded = 1; - } - - in->chunkId = chunk; - - } else if (!in->valid) { - /* we need to load this info */ - - in->valid = 1; - in->chunkId = chunk; - - if(oh) { - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; -#endif - - if (oh->shadowsObject > 0) - yaffs_HandleShadowedObject(dev, - oh-> - shadowsObject, - 1); - - - yaffs_SetObjectName(in, oh->name); - parent = - yaffs_FindOrCreateObjectByNumber - (dev, oh->parentObjectId, - YAFFS_OBJECT_TYPE_DIRECTORY); - - fileSize = oh->fileSize; - isShrink = oh->isShrink; - equivalentObjectId = oh->equivalentObjectId; - - } - else { - in->variantType = tags.extraObjectType; - parent = - yaffs_FindOrCreateObjectByNumber - (dev, tags.extraParentObjectId, - YAFFS_OBJECT_TYPE_DIRECTORY); - fileSize = tags.extraFileLength; - isShrink = tags.extraIsShrinkHeader; - equivalentObjectId = tags.extraEquivalentObjectId; - in->lazyLoaded = 1; - - } - in->dirty = 0; - - /* directory stuff... - * hook up to parent - */ - - 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 - */ - - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: attempting to use non-directory as" - " a directory in scan. Put in lost+found." - TENDSTR))); - parent = dev->lostNFoundDir; - } - - yaffs_AddObjectToDirectory(parent, in); - - itsUnlinked = (parent == dev->deletedDir) || - (parent == dev->unlinkedDir); - - if (isShrink) { - /* Mark the block as having a shrinkHeader */ - bi->hasShrinkHeader = 1; - } - - /* Note re hardlinks. - * Since we might scan a hardlink before its equivalent object is scanned - * we put them all in a list. - * After scanning is complete, we should have all the objects, so we run - * through this list and fix up all the chains. - */ - - switch (in->variantType) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Todo got a problem */ - break; - case YAFFS_OBJECT_TYPE_FILE: - - if (in->variant.fileVariant. - scannedFileSize < fileSize) { - /* This covers the case where the file size is greater - * than where the data is - * This will happen if the file is resized to be larger - * than its current data extents. - */ - in->variant.fileVariant.fileSize = fileSize; - in->variant.fileVariant.scannedFileSize = - in->variant.fileVariant.fileSize; - } - - if (isShrink && - in->variant.fileVariant.shrinkSize > fileSize) { - in->variant.fileVariant.shrinkSize = fileSize; - } - - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - if(!itsUnlinked) { - in->variant.hardLinkVariant.equivalentObjectId = - equivalentObjectId; - in->hardLinks.next = - (struct list_head *) hardList; - hardList = in; - } - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - if(oh){ - in->variant.symLinkVariant.alias = - yaffs_CloneString(oh-> - alias); - if(!in->variant.symLinkVariant.alias) - alloc_failed = 1; - } - break; - } + hanging = 0; + depth_limit = 100; + while (parent != dev->root_dir && + parent->parent && + parent->parent->variant_type == + YAFFS_OBJECT_TYPE_DIRECTORY && + depth_limit > 0) { + parent = parent->parent; + depth_limit--; } - + if (parent != dev->root_dir) + hanging = 1; } - - } /* End of scanning for each chunk */ - - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - /* If we got this far while scanning, then the block is fully allocated. */ - state = YAFFS_BLOCK_STATE_FULL; - } - - bi->blockState = state; - - /* Now let's see if it was dirty */ - if (bi->pagesInUse == 0 && - !bi->hasShrinkHeader && - bi->blockState == YAFFS_BLOCK_STATE_FULL) { - yaffs_BlockBecameDirty(dev, blk); - } - - } - - if (altBlockIndex) - YFREE_ALT(blockIndex); - else - YFREE(blockIndex); - - /* Ok, we've done all the scanning. - * Fix up the hard link chains. - * We should now have scanned all the objects, now it's time to add these - * hardlinks. - */ - yaffs_HardlinkFixup(dev,hardList); - - - /* - * Sort out state of unlinked and deleted objects. - */ - { - struct list_head *i; - struct list_head *n; - - yaffs_Object *l; - - /* Soft delete all the unlinked files */ - list_for_each_safe(i, n, - &dev->unlinkedDir->variant.directoryVariant. - children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - yaffs_DestroyObject(l); - } - } - - /* Soft delete all the deletedDir files */ - list_for_each_safe(i, n, - &dev->deletedDir->variant.directoryVariant. - children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - yaffs_DestroyObject(l); - + if (hanging) { + yaffs_trace(YAFFS_TRACE_SCAN, + "Hanging object %d moved to lost and found", + obj->obj_id); + yaffs_add_obj_to_dir(dev->lost_n_found, obj); } } } - - yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); - - if(alloc_failed){ - return YAFFS_FAIL; - } - - T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR))); - - return YAFFS_OK; } -/*------------------------------ Directory Functions ----------------------------- */ - -static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj) +/* + * Delete directory contents for cleaning up lost and found. + */ +static void yaffs_del_dir_contents(struct yaffs_obj *dir) { - yaffs_Device *dev = obj->myDev; + struct yaffs_obj *obj; + struct list_head *lh; + struct list_head *n; - if(dev && dev->removeObjectCallback) - dev->removeObjectCallback(obj); + if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) + BUG(); - list_del_init(&obj->siblings); - obj->parent = NULL; + list_for_each_safe(lh, n, &dir->variant.dir_variant.children) { + obj = list_entry(lh, struct yaffs_obj, siblings); + if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) + yaffs_del_dir_contents(obj); + yaffs_trace(YAFFS_TRACE_SCAN, + "Deleting lost_found object %d", + obj->obj_id); + yaffs_unlink_obj(obj); + } } - -static void yaffs_AddObjectToDirectory(yaffs_Object * directory, - yaffs_Object * obj) +static void yaffs_empty_l_n_f(struct yaffs_dev *dev) { - - if (!directory) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: Trying to add an object to a null pointer directory" - TENDSTR))); - YBUG(); - } - if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: Trying to add an object to a non-directory" - TENDSTR))); - YBUG(); - } - - if (obj->siblings.prev == NULL) { - /* Not initialised */ - INIT_LIST_HEAD(&obj->siblings); - - } else if (!list_empty(&obj->siblings)) { - /* If it is holed up somewhere else, un hook it */ - yaffs_RemoveObjectFromDirectory(obj); - } - /* Now add it */ - list_add(&obj->siblings, &directory->variant.directoryVariant.children); - obj->parent = directory; - - if (directory == obj->myDev->unlinkedDir - || directory == obj->myDev->deletedDir) { - obj->unlinked = 1; - obj->myDev->nUnlinkedFiles++; - obj->renameAllowed = 0; - } + yaffs_del_dir_contents(dev->lost_n_found); } -yaffs_Object *yaffs_FindObjectByName(yaffs_Object * directory, - const YCHAR * name) + +struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *directory, + const YCHAR *name) { int sum; - struct list_head *i; YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1]; + struct yaffs_obj *l; - yaffs_Object *l; - - if (!name) { + if (!name) return NULL; - } if (!directory) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: null pointer directory" - TENDSTR))); - YBUG(); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: yaffs_find_by_name: null pointer directory" + ); + BUG(); + return NULL; } - if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR))); - YBUG(); + if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: yaffs_find_by_name: non-directory" + ); + BUG(); } - sum = yaffs_CalcNameSum(name); + sum = yaffs_calc_name_sum(name); - list_for_each(i, &directory->variant.directoryVariant.children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); + list_for_each(i, &directory->variant.dir_variant.children) { + l = list_entry(i, struct yaffs_obj, siblings); - yaffs_CheckObjectDetailsLoaded(l); + if (l->parent != directory) + BUG(); - /* Special case for lost-n-found */ - if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) { - if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0) { - return l; - } - } else if (yaffs_SumCompare(l->sum, sum) || l->chunkId <= 0) - { - /* LostnFound cunk called Objxxx - * Do a real check - */ - yaffs_GetObjectName(l, buffer, - YAFFS_MAX_NAME_LENGTH); - if (yaffs_strncmp(name, buffer,YAFFS_MAX_NAME_LENGTH) == 0) { - return l; - } + yaffs_check_obj_details_loaded(l); - } + /* Special case for lost-n-found */ + if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { + if (!yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME)) + return l; + } else if (l->sum == sum || l->hdr_chunk <= 0) { + /* LostnFound chunk called Objxxx + * Do a real check + */ + yaffs_get_obj_name(l, buffer, + YAFFS_MAX_NAME_LENGTH + 1); + if (!yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH)) + return l; } } - return NULL; } - -#if 0 -int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir, - int (*fn) (yaffs_Object *)) -{ - struct list_head *i; - yaffs_Object *l; - - if (!theDir) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: null pointer directory" - TENDSTR))); - YBUG(); - } - if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR))); - YBUG(); - } - - list_for_each(i, &theDir->variant.directoryVariant.children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - if (l && !fn(l)) { - return YAFFS_FAIL; - } - } - } - - return YAFFS_OK; - -} -#endif - /* GetEquivalentObject dereferences any hard links to get to the * actual object. */ -yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj) +struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj) { - if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { - /* We want the object id of the equivalent object, not this one */ - obj = obj->variant.hardLinkVariant.equivalentObject; - yaffs_CheckObjectDetailsLoaded(obj); + if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { + obj = obj->variant.hardlink_variant.equiv_obj; + yaffs_check_obj_details_loaded(obj); } return obj; - } -int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize) -{ - memset(name, 0, buffSize * sizeof(YCHAR)); - - yaffs_CheckObjectDetailsLoaded(obj); +/* + * A note or two on object names. + * * If the object name is missing, we then make one up in the form objnnn + * + * * ASCII names are stored in the object header's name field from byte zero + * * Unicode names are historically stored starting from byte zero. + * + * Then there are automatic Unicode names... + * The purpose of these is to save names in a way that can be read as + * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII + * system to share files. + * + * These automatic unicode are stored slightly differently... + * - If the name can fit in the ASCII character space then they are saved as + * ascii names as per above. + * - If the name needs Unicode then the name is saved in Unicode + * starting at oh->name[1]. - if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) { - yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1); - } else if (obj->chunkId <= 0) { - YCHAR locName[20]; + */ +static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR *name, + int buffer_size) +{ + /* Create an object name if we could not find one. */ + if (yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH) == 0) { + YCHAR local_name[20]; + YCHAR num_string[20]; + YCHAR *x = &num_string[19]; + unsigned v = obj->obj_id; + num_string[19] = 0; + while (v > 0) { + x--; + *x = '0' + (v % 10); + v /= 10; + } /* make up a name */ - yaffs_sprintf(locName, _Y("%s%d"), YAFFS_LOSTNFOUND_PREFIX, - obj->objectId); - yaffs_strncpy(name, locName, buffSize - 1); - - } -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - else if (obj->shortName[0]) { - yaffs_strcpy(name, obj->shortName); + yaffs_strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX); + yaffs_strcat(local_name, x); + yaffs_strncpy(name, local_name, buffer_size - 1); } -#endif - else { - __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__); +} + +int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR *name, int buffer_size) +{ + memset(name, 0, buffer_size * sizeof(YCHAR)); + yaffs_check_obj_details_loaded(obj); + if (obj->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { + yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1); + } else if (obj->short_name[0]) { + yaffs_strcpy(name, obj->short_name); + } else if (obj->hdr_chunk > 0) { + int result; + u8 *buffer = yaffs_get_temp_buffer(obj->my_dev); - yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer; + struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)buffer; - memset(buffer, 0, obj->myDev->nDataBytesPerChunk); + memset(buffer, 0, obj->my_dev->data_bytes_per_chunk); - if (obj->chunkId >= 0) { - yaffs_ReadChunkWithTagsFromNAND(obj->myDev, - obj->chunkId, buffer, - NULL); + if (obj->hdr_chunk > 0) { + result = yaffs_rd_chunk_tags_nand(obj->my_dev, + obj->hdr_chunk, + buffer, NULL); } - yaffs_strncpy(name, oh->name, buffSize - 1); + yaffs_load_name_from_oh(obj->my_dev, name, oh->name, + buffer_size); - yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__); + yaffs_release_temp_buffer(obj->my_dev, buffer); } - return yaffs_strlen(name); + yaffs_fix_null_name(obj, name, buffer_size); + + return yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH); } -int yaffs_GetObjectFileLength(yaffs_Object * obj) +loff_t yaffs_get_obj_length(struct yaffs_obj *obj) { - /* Dereference any hard linking */ - obj = yaffs_GetEquivalentObject(obj); + obj = yaffs_get_equivalent_obj(obj); - if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) { - return obj->variant.fileVariant.fileSize; - } - if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) { - return yaffs_strlen(obj->variant.symLinkVariant.alias); + if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) + return obj->variant.file_variant.file_size; + if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { + if (!obj->variant.symlink_variant.alias) + return 0; + return yaffs_strnlen(obj->variant.symlink_variant.alias, + YAFFS_MAX_ALIAS_LENGTH); } else { /* Only a directory should drop through to here */ - return obj->myDev->nDataBytesPerChunk; + return obj->my_dev->data_bytes_per_chunk; } } -int yaffs_GetObjectLinkCount(yaffs_Object * obj) +int yaffs_get_obj_link_count(struct yaffs_obj *obj) { int count = 0; struct list_head *i; - if (!obj->unlinked) { + if (!obj->unlinked) count++; /* the object itself */ - } - list_for_each(i, &obj->hardLinks) { - count++; /* add the hard links; */ - } - return count; + list_for_each(i, &obj->hard_links) + count++; /* add the hard links; */ + + return count; } -int yaffs_GetObjectInode(yaffs_Object * obj) +int yaffs_get_obj_inode(struct yaffs_obj *obj) { - obj = yaffs_GetEquivalentObject(obj); + obj = yaffs_get_equivalent_obj(obj); - return obj->objectId; + return obj->obj_id; } -unsigned yaffs_GetObjectType(yaffs_Object * obj) +unsigned yaffs_get_obj_type(struct yaffs_obj *obj) { - obj = yaffs_GetEquivalentObject(obj); + obj = yaffs_get_equivalent_obj(obj); - switch (obj->variantType) { + switch (obj->variant_type) { case YAFFS_OBJECT_TYPE_FILE: return DT_REG; break; @@ -6725,605 +4532,501 @@ unsigned yaffs_GetObjectType(yaffs_Object * obj) return DT_BLK; if (S_ISSOCK(obj->yst_mode)) return DT_SOCK; + return DT_REG; + break; default: return DT_REG; break; } } -YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj) -{ - obj = yaffs_GetEquivalentObject(obj); - if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) { - return yaffs_CloneString(obj->variant.symLinkVariant.alias); - } else { - return yaffs_CloneString(_Y("")); - } -} - -#ifndef CONFIG_YAFFS_WINCE - -int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr) -{ - unsigned int valid = attr->ia_valid; - - if (valid & ATTR_MODE) - obj->yst_mode = attr->ia_mode; - if (valid & ATTR_UID) - obj->yst_uid = attr->ia_uid; - if (valid & ATTR_GID) - obj->yst_gid = attr->ia_gid; - - if (valid & ATTR_ATIME) - obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime); - if (valid & ATTR_CTIME) - obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime); - if (valid & ATTR_MTIME) - obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime); - - if (valid & ATTR_SIZE) - yaffs_ResizeFile(obj, attr->ia_size); - - yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0); - - return YAFFS_OK; - -} -int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr) +YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj) { - unsigned int valid = 0; - - attr->ia_mode = obj->yst_mode; - valid |= ATTR_MODE; - attr->ia_uid = obj->yst_uid; - valid |= ATTR_UID; - attr->ia_gid = obj->yst_gid; - valid |= ATTR_GID; - - Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime; - valid |= ATTR_ATIME; - Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime; - valid |= ATTR_CTIME; - Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; - valid |= ATTR_MTIME; - - attr->ia_size = yaffs_GetFileSize(obj); - valid |= ATTR_SIZE; - - attr->ia_valid = valid; - - return YAFFS_OK; - -} - -#endif - -#if 0 -int yaffs_DumpObject(yaffs_Object * obj) -{ - YCHAR name[257]; - - yaffs_GetObjectName(obj, name, 256); - - 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))); - - return YAFFS_OK; + obj = yaffs_get_equivalent_obj(obj); + if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) + return yaffs_clone_str(obj->variant.symlink_variant.alias); + else + return yaffs_clone_str(_Y("")); } -#endif -/*---------------------------- Initialisation code -------------------------------------- */ +/*--------------------------- Initialisation code -------------------------- */ -static int yaffs_CheckDevFunctions(const yaffs_Device * dev) +static int yaffs_check_dev_fns(const struct yaffs_dev *dev) { - /* Common functions, gotta have */ - if (!dev->eraseBlockInNAND || !dev->initialiseNAND) + if (!dev->param.erase_fn || !dev->param.initialise_flash_fn) return 0; -#ifdef CONFIG_YAFFS_YAFFS2 - /* Can use the "with tags" style interface for yaffs1 or yaffs2 */ - if (dev->writeChunkWithTagsToNAND && - dev->readChunkWithTagsFromNAND && - !dev->writeChunkToNAND && - !dev->readChunkFromNAND && - dev->markNANDBlockBad && dev->queryNANDBlock) + if (dev->param.write_chunk_tags_fn && + dev->param.read_chunk_tags_fn && + !dev->param.write_chunk_fn && + !dev->param.read_chunk_fn && + dev->param.bad_block_fn && dev->param.query_block_fn) return 1; -#endif /* Can use the "spare" style interface for yaffs1 */ - if (!dev->isYaffs2 && - !dev->writeChunkWithTagsToNAND && - !dev->readChunkWithTagsFromNAND && - dev->writeChunkToNAND && - dev->readChunkFromNAND && - !dev->markNANDBlockBad && !dev->queryNANDBlock) + if (!dev->param.is_yaffs2 && + !dev->param.write_chunk_tags_fn && + !dev->param.read_chunk_tags_fn && + dev->param.write_chunk_fn && + dev->param.read_chunk_fn && + !dev->param.bad_block_fn && !dev->param.query_block_fn) return 1; return 0; /* bad */ } - -static int yaffs_CreateInitialDirectories(yaffs_Device *dev) +static int yaffs_create_initial_dir(struct yaffs_dev *dev) { - /* Initialise the unlinked, deleted, root and lost and found directories */ - - dev->lostNFoundDir = dev->rootDir = NULL; - dev->unlinkedDir = dev->deletedDir = NULL; + /* Initialise the unlinked, deleted, root and lost+found directories */ + dev->lost_n_found = dev->root_dir = NULL; + dev->unlinked_dir = dev->del_dir = NULL; + dev->unlinked_dir = + yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); + dev->del_dir = + yaffs_create_fake_dir(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); + dev->root_dir = + yaffs_create_fake_dir(dev, YAFFS_OBJECTID_ROOT, + YAFFS_ROOT_MODE | S_IFDIR); + dev->lost_n_found = + yaffs_create_fake_dir(dev, YAFFS_OBJECTID_LOSTNFOUND, + YAFFS_LOSTNFOUND_MODE | S_IFDIR); - dev->unlinkedDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); - - dev->deletedDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); - - dev->rootDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT, - YAFFS_ROOT_MODE | S_IFDIR); - dev->lostNFoundDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND, - YAFFS_LOSTNFOUND_MODE | S_IFDIR); - - if(dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir){ - yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir); + if (dev->lost_n_found && dev->root_dir && dev->unlinked_dir + && dev->del_dir) { + yaffs_add_obj_to_dir(dev->root_dir, dev->lost_n_found); return YAFFS_OK; } - return YAFFS_FAIL; } -int yaffs_GutsInitialise(yaffs_Device * dev) +int yaffs_guts_initialise(struct yaffs_dev *dev) { int init_failed = 0; unsigned x; int bits; - T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR))); + yaffs_trace(YAFFS_TRACE_TRACING, "yaffs: yaffs_guts_initialise()"); /* Check stuff that must be set */ if (!dev) { - T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Need a device" + ); return YAFFS_FAIL; } - dev->internalStartBlock = dev->startBlock; - dev->internalEndBlock = dev->endBlock; - dev->blockOffset = 0; - dev->chunkOffset = 0; - dev->nFreeChunks = 0; + if (dev->is_mounted) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "device already mounted"); + return YAFFS_FAIL; + } + + dev->internal_start_block = dev->param.start_block; + dev->internal_end_block = dev->param.end_block; + dev->block_offset = 0; + dev->chunk_offset = 0; + dev->n_free_chunks = 0; - if (dev->startBlock == 0) { - dev->internalStartBlock = dev->startBlock + 1; - dev->internalEndBlock = dev->endBlock + 1; - dev->blockOffset = 1; - dev->chunkOffset = dev->nChunksPerBlock; + dev->gc_block = 0; + + if (dev->param.start_block == 0) { + dev->internal_start_block = dev->param.start_block + 1; + dev->internal_end_block = dev->param.end_block + 1; + dev->block_offset = 1; + dev->chunk_offset = dev->param.chunks_per_block; } /* Check geometry parameters. */ - if ((dev->isYaffs2 && dev->nDataBytesPerChunk < 1024) || - (!dev->isYaffs2 && dev->nDataBytesPerChunk != 512) || - dev->nChunksPerBlock < 2 || - dev->nReservedBlocks < 2 || - dev->internalStartBlock <= 0 || - dev->internalEndBlock <= 0 || - dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2) // otherwise it is too small - ) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s " - TENDSTR), dev->nDataBytesPerChunk, dev->isYaffs2 ? "2" : "")); + if ((!dev->param.inband_tags && dev->param.is_yaffs2 && + dev->param.total_bytes_per_chunk < 1024) || + (!dev->param.is_yaffs2 && + dev->param.total_bytes_per_chunk < 512) || + (dev->param.inband_tags && !dev->param.is_yaffs2) || + dev->param.chunks_per_block < 2 || + dev->param.n_reserved_blocks < 2 || + dev->internal_start_block <= 0 || + dev->internal_end_block <= 0 || + dev->internal_end_block <= + (dev->internal_start_block + dev->param.n_reserved_blocks + 2) + ) { + /* otherwise it is too small */ + yaffs_trace(YAFFS_TRACE_ALWAYS, + "NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d ", + dev->param.total_bytes_per_chunk, + dev->param.is_yaffs2 ? "2" : "", + dev->param.inband_tags); return YAFFS_FAIL; } - if (yaffs_InitialiseNAND(dev) != YAFFS_OK) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: InitialiseNAND failed" TENDSTR))); + if (yaffs_init_nand(dev) != YAFFS_OK) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "InitialiseNAND failed"); return YAFFS_FAIL; } + /* Sort out space for inband tags, if required */ + if (dev->param.inband_tags) + dev->data_bytes_per_chunk = + dev->param.total_bytes_per_chunk - + sizeof(struct yaffs_packed_tags2_tags_only); + else + dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk; + /* Got the right mix of functions? */ - if (!yaffs_CheckDevFunctions(dev)) { + if (!yaffs_check_dev_fns(dev)) { /* Function missing */ - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs: device function(s) missing or wrong\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "device function(s) missing or wrong"); return YAFFS_FAIL; } - /* This is really a compilation check. */ - if (!yaffs_CheckStructures()) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs_CheckStructures failed\n" TENDSTR))); - return YAFFS_FAIL; - } - - if (dev->isMounted) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: device already mounted\n" TENDSTR))); - return YAFFS_FAIL; - } - - /* Finished with most checks. One or two more checks happen later on too. */ - - dev->isMounted = 1; - + /* Finished with most checks. Further checks happen later on too. */ + dev->is_mounted = 1; /* OK now calculate a few things for the device */ /* * Calculate all the chunk size manipulation numbers: */ - /* Start off assuming it is a power of 2 */ - dev->chunkShift = ShiftDiv(dev->nDataBytesPerChunk); - dev->chunkMask = (1<<dev->chunkShift) - 1; - - if(dev->nDataBytesPerChunk == (dev->chunkMask + 1)){ - /* Yes it is a power of 2, disable crumbs */ - dev->crumbMask = 0; - dev->crumbShift = 0; - dev->crumbsPerChunk = 0; - } else { - /* Not a power of 2, use crumbs instead */ - dev->crumbShift = ShiftDiv(sizeof(yaffs_PackedTags2TagsPart)); - dev->crumbMask = (1<<dev->crumbShift)-1; - dev->crumbsPerChunk = dev->nDataBytesPerChunk/(1 << dev->crumbShift); - dev->chunkShift = 0; - dev->chunkMask = 0; - } - + x = dev->data_bytes_per_chunk; + /* We always use dev->chunk_shift and dev->chunk_div */ + dev->chunk_shift = calc_shifts(x); + x >>= dev->chunk_shift; + dev->chunk_div = x; + /* We only use chunk mask if chunk_div is 1 */ + dev->chunk_mask = (1 << dev->chunk_shift) - 1; /* - * Calculate chunkGroupBits. - * We need to find the next power of 2 > than internalEndBlock + * Calculate chunk_grp_bits. + * We need to find the next power of 2 > than internal_end_block */ - x = dev->nChunksPerBlock * (dev->internalEndBlock + 1); + x = dev->param.chunks_per_block * (dev->internal_end_block + 1); - bits = ShiftsGE(x); + bits = calc_shifts_ceiling(x); /* Set up tnode width if wide tnodes are enabled. */ - if(!dev->wideTnodesDisabled){ + if (!dev->param.wide_tnodes_disabled) { /* bits must be even so that we end up with 32-bit words */ - if(bits & 1) + if (bits & 1) bits++; - if(bits < 16) - dev->tnodeWidth = 16; + if (bits < 16) + dev->tnode_width = 16; else - dev->tnodeWidth = bits; + dev->tnode_width = bits; + } else { + dev->tnode_width = 16; } - else - dev->tnodeWidth = 16; - dev->tnodeMask = (1<<dev->tnodeWidth)-1; + dev->tnode_mask = (1 << dev->tnode_width) - 1; /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled), * so if the bitwidth of the * chunk range we're using is greater than 16 we need - * to figure out chunk shift and chunkGroupSize + * to figure out chunk shift and chunk_grp_size */ - if (bits <= dev->tnodeWidth) - dev->chunkGroupBits = 0; + if (bits <= dev->tnode_width) + dev->chunk_grp_bits = 0; else - dev->chunkGroupBits = bits - dev->tnodeWidth; + dev->chunk_grp_bits = bits - dev->tnode_width; + dev->tnode_size = (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8; + if (dev->tnode_size < sizeof(struct yaffs_tnode)) + dev->tnode_size = sizeof(struct yaffs_tnode); - dev->chunkGroupSize = 1 << dev->chunkGroupBits; + dev->chunk_grp_size = 1 << dev->chunk_grp_bits; - if (dev->nChunksPerBlock < dev->chunkGroupSize) { + if (dev->param.chunks_per_block < dev->chunk_grp_size) { /* 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". */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: chunk group too large\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, "chunk group too large"); return YAFFS_FAIL; } - /* OK, we've finished verifying the device, lets continue with initialisation */ + /* Finished verifying the device, continue with initialisation */ /* More device initialisation */ - dev->garbageCollections = 0; - dev->passiveGarbageCollections = 0; - dev->currentDirtyChecker = 0; - dev->bufferedBlock = -1; - dev->doingBufferedBlockRewrite = 0; - dev->nDeletedFiles = 0; - dev->nBackgroundDeletions = 0; - dev->nUnlinkedFiles = 0; - dev->eccFixed = 0; - dev->eccUnfixed = 0; - dev->tagsEccFixed = 0; - dev->tagsEccUnfixed = 0; - dev->nErasureFailures = 0; - dev->nErasedBlocks = 0; - dev->isDoingGC = 0; - dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */ + dev->all_gcs = 0; + dev->passive_gc_count = 0; + dev->oldest_dirty_gc_count = 0; + dev->bg_gcs = 0; + dev->gc_block_finder = 0; + dev->buffered_block = -1; + dev->doing_buffered_block_rewrite = 0; + dev->n_deleted_files = 0; + dev->n_bg_deletions = 0; + dev->n_unlinked_files = 0; + dev->n_ecc_fixed = 0; + dev->n_ecc_unfixed = 0; + dev->n_tags_ecc_fixed = 0; + dev->n_tags_ecc_unfixed = 0; + dev->n_erase_failures = 0; + dev->n_erased_blocks = 0; + dev->gc_disable = 0; + dev->has_pending_prioritised_gc = 1; + /* Assume the worst for now, will get fixed on first GC */ + INIT_LIST_HEAD(&dev->dirty_dirs); + dev->oldest_dirty_seq = 0; + dev->oldest_dirty_block = 0; /* Initialise temporary buffers and caches. */ - if(!yaffs_InitialiseTempBuffers(dev)) + if (!yaffs_init_tmp_buffers(dev)) init_failed = 1; - dev->srCache = NULL; - dev->gcCleanupList = NULL; - + dev->cache = NULL; + dev->gc_cleanup_list = NULL; - if (!init_failed && - dev->nShortOpCaches > 0) { + if (!init_failed && dev->param.n_caches > 0) { int i; - __u8 *buf; - int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache); + void *buf; + int cache_bytes = + dev->param.n_caches * sizeof(struct yaffs_cache); - if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES) { - dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES; - } + if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES) + dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES; + + dev->cache = kmalloc(cache_bytes, GFP_NOFS); - dev->srCache = YMALLOC(srCacheBytes); - buf = (__u8 *)dev->srCache; + buf = (u8 *) dev->cache; - if(dev->srCache) - memset(dev->srCache,0,srCacheBytes); + if (dev->cache) + memset(dev->cache, 0, cache_bytes); - for (i = 0; i < dev->nShortOpCaches && buf; i++) { - dev->srCache[i].object = NULL; - dev->srCache[i].lastUse = 0; - dev->srCache[i].dirty = 0; - dev->srCache[i].data = buf = YMALLOC_DMA(dev->nDataBytesPerChunk); + for (i = 0; i < dev->param.n_caches && buf; i++) { + dev->cache[i].object = NULL; + dev->cache[i].last_use = 0; + dev->cache[i].dirty = 0; + dev->cache[i].data = buf = + kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); } - if(!buf) + if (!buf) init_failed = 1; - dev->srLastUse = 0; + dev->cache_last_use = 0; } - dev->cacheHits = 0; + dev->cache_hits = 0; - if(!init_failed){ - dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32)); - if(!dev->gcCleanupList) + if (!init_failed) { + dev->gc_cleanup_list = + kmalloc(dev->param.chunks_per_block * sizeof(u32), + GFP_NOFS); + if (!dev->gc_cleanup_list) init_failed = 1; } - if (dev->isYaffs2) { - dev->useHeaderFileSize = 1; - } - if(!init_failed && !yaffs_InitialiseBlocks(dev)) + if (dev->param.is_yaffs2) + dev->param.use_header_file_size = 1; + + if (!init_failed && !yaffs_init_blocks(dev)) init_failed = 1; - yaffs_InitialiseTnodes(dev); - yaffs_InitialiseObjects(dev); + yaffs_init_tnodes_and_objs(dev); - if(!init_failed && !yaffs_CreateInitialDirectories(dev)) + if (!init_failed && !yaffs_create_initial_dir(dev)) init_failed = 1; + if (!init_failed && dev->param.is_yaffs2 && + !dev->param.disable_summary && + !yaffs_summary_init(dev)) + init_failed = 1; - if(!init_failed){ + if (!init_failed) { /* Now scan the flash. */ - if (dev->isYaffs2) { - if(yaffs_CheckpointRestore(dev)) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: restored from checkpoint" TENDSTR))); + if (dev->param.is_yaffs2) { + if (yaffs2_checkpt_restore(dev)) { + yaffs_check_obj_details_loaded(dev->root_dir); + yaffs_trace(YAFFS_TRACE_CHECKPOINT | + YAFFS_TRACE_MOUNT, + "yaffs: restored from checkpoint" + ); } else { - /* Clean up the mess caused by an aborted checkpoint load - * and scan backwards. + /* Clean up the mess caused by an aborted + * checkpoint load then scan backwards. */ - yaffs_DeinitialiseBlocks(dev); - yaffs_DeinitialiseTnodes(dev); - yaffs_DeinitialiseObjects(dev); + yaffs_deinit_blocks(dev); + yaffs_deinit_tnodes_and_objs(dev); - dev->nErasedBlocks = 0; - dev->nFreeChunks = 0; - dev->allocationBlock = -1; - dev->allocationPage = -1; - dev->nDeletedFiles = 0; - dev->nUnlinkedFiles = 0; - dev->nBackgroundDeletions = 0; - dev->oldestDirtySequence = 0; + dev->n_erased_blocks = 0; + dev->n_free_chunks = 0; + dev->alloc_block = -1; + dev->alloc_page = -1; + dev->n_deleted_files = 0; + dev->n_unlinked_files = 0; + dev->n_bg_deletions = 0; - if(!init_failed && !yaffs_InitialiseBlocks(dev)) + if (!init_failed && !yaffs_init_blocks(dev)) init_failed = 1; - yaffs_InitialiseTnodes(dev); - yaffs_InitialiseObjects(dev); + yaffs_init_tnodes_and_objs(dev); - if(!init_failed && !yaffs_CreateInitialDirectories(dev)) + if (!init_failed + && !yaffs_create_initial_dir(dev)) init_failed = 1; - if(!init_failed && !yaffs_ScanBackwards(dev)) + if (!init_failed && !yaffs2_scan_backwards(dev)) init_failed = 1; } - }else - if(!yaffs_Scan(dev)) - init_failed = 1; + } else if (!yaffs1_scan(dev)) { + init_failed = 1; + } + + yaffs_strip_deleted_objs(dev); + yaffs_fix_hanging_objs(dev); + if (dev->param.empty_lost_n_found) + yaffs_empty_l_n_f(dev); } - if(init_failed){ + if (init_failed) { /* Clean up the mess */ - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: yaffs_guts_initialise() aborted."); - yaffs_Deinitialise(dev); + yaffs_deinitialise(dev); return YAFFS_FAIL; } /* Zero out stats */ - dev->nPageReads = 0; - dev->nPageWrites = 0; - dev->nBlockErasures = 0; - dev->nGCCopies = 0; - dev->nRetriedWrites = 0; + dev->n_page_reads = 0; + dev->n_page_writes = 0; + dev->n_erasures = 0; + dev->n_gc_copies = 0; + dev->n_retried_writes = 0; - dev->nRetiredBlocks = 0; + dev->n_retired_blocks = 0; - yaffs_VerifyFreeChunks(dev); - yaffs_VerifyBlocks(dev); + yaffs_verify_free_chunks(dev); + yaffs_verify_blocks(dev); + /* Clean up any aborted checkpoint data */ + if (!dev->is_checkpointed && dev->blocks_in_checkpt > 0) + yaffs2_checkpt_invalidate(dev); - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: yaffs_guts_initialise() done."); return YAFFS_OK; - } -void yaffs_Deinitialise(yaffs_Device * dev) +void yaffs_deinitialise(struct yaffs_dev *dev) { - if (dev->isMounted) { + if (dev->is_mounted) { int i; - yaffs_DeinitialiseBlocks(dev); - yaffs_DeinitialiseTnodes(dev); - yaffs_DeinitialiseObjects(dev); - if (dev->nShortOpCaches > 0 && - dev->srCache) { + yaffs_deinit_blocks(dev); + yaffs_deinit_tnodes_and_objs(dev); + yaffs_summary_deinit(dev); - for (i = 0; i < dev->nShortOpCaches; i++) { - if(dev->srCache[i].data) - YFREE(dev->srCache[i].data); - dev->srCache[i].data = NULL; + if (dev->param.n_caches > 0 && dev->cache) { + + for (i = 0; i < dev->param.n_caches; i++) { + kfree(dev->cache[i].data); + dev->cache[i].data = NULL; } - YFREE(dev->srCache); - dev->srCache = NULL; + kfree(dev->cache); + dev->cache = NULL; } - YFREE(dev->gcCleanupList); + kfree(dev->gc_cleanup_list); - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - YFREE(dev->tempBuffer[i].buffer); - } + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) + kfree(dev->temp_buffer[i].buffer); - dev->isMounted = 0; - } + dev->is_mounted = 0; + if (dev->param.deinitialise_flash_fn) + dev->param.deinitialise_flash_fn(dev); + } } -static int yaffs_CountFreeChunks(yaffs_Device * dev) +int yaffs_count_free_chunks(struct yaffs_dev *dev) { - int nFree; + int n_free = 0; int b; + struct yaffs_block_info *blk; - yaffs_BlockInfo *blk; - - for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock; - b++) { - blk = yaffs_GetBlockInfo(dev, b); - - switch (blk->blockState) { + blk = dev->block_info; + for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) { + switch (blk->block_state) { case YAFFS_BLOCK_STATE_EMPTY: case YAFFS_BLOCK_STATE_ALLOCATING: case YAFFS_BLOCK_STATE_COLLECTING: case YAFFS_BLOCK_STATE_FULL: - nFree += - (dev->nChunksPerBlock - blk->pagesInUse + - blk->softDeletions); + n_free += + (dev->param.chunks_per_block - blk->pages_in_use + + blk->soft_del_pages); break; default: break; } - + blk++; } - - return nFree; + return n_free; } -int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev) +int yaffs_get_n_free_chunks(struct yaffs_dev *dev) { /* This is what we report to the outside world */ + int n_free; + int n_dirty_caches; + int blocks_for_checkpt; + int i; - int nFree; - int nDirtyCacheChunks; - int blocksForCheckpoint; - -#if 1 - nFree = dev->nFreeChunks; -#else - nFree = yaffs_CountFreeChunks(dev); -#endif - - nFree += dev->nDeletedFiles; + n_free = dev->n_free_chunks; + n_free += dev->n_deleted_files; - /* Now count the number of dirty chunks in the cache and subtract those */ + /* Now count and subtract the number of dirty chunks in the cache. */ - { - int i; - for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].dirty) - nDirtyCacheChunks++; - } + for (n_dirty_caches = 0, i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].dirty) + n_dirty_caches++; } - nFree -= nDirtyCacheChunks; - - nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock); + n_free -= n_dirty_caches; - /* Now we figure out how much to reserve for the checkpoint and report that... */ - blocksForCheckpoint = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint; - if(blocksForCheckpoint < 0) - blocksForCheckpoint = 0; + n_free -= + ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block); - nFree -= (blocksForCheckpoint * dev->nChunksPerBlock); + /* Now figure checkpoint space and report that... */ + blocks_for_checkpt = yaffs_calc_checkpt_blocks_required(dev); - if (nFree < 0) - nFree = 0; + n_free -= (blocks_for_checkpt * dev->param.chunks_per_block); - return nFree; + if (n_free < 0) + n_free = 0; + return n_free; } -static int yaffs_freeVerificationFailures; - -static void yaffs_VerifyFreeChunks(yaffs_Device * dev) +/*\ + * Marshalling functions to get loff_t file sizes into aand out of + * object headers. + */ +void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize) { - int counted; - int difference; - - if(yaffs_SkipVerification(dev)) - return; - - counted = yaffs_CountFreeChunks(dev); - - difference = dev->nFreeChunks - counted; - - if (difference) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("Freechunks verification failure %d %d %d" TENDSTR), - dev->nFreeChunks, counted, difference)); - yaffs_freeVerificationFailures++; - } + oh->file_size_low = (fsize & 0xFFFFFFFF); + oh->file_size_high = ((fsize >> 32) & 0xFFFFFFFF); } -/*---------------------------------------- YAFFS test code ----------------------*/ - -#define yaffs_CheckStruct(structure,syze, name) \ - if(sizeof(structure) != syze) \ - { \ - T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),\ - name,syze,sizeof(structure))); \ - return YAFFS_FAIL; \ - } - -static int yaffs_CheckStructures(void) +loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh) { -/* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags") */ -/* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion") */ -/* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare") */ -#ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG - yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode") -#endif - yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader") + loff_t retval; + + if (~(oh->file_size_high)) + retval = (((loff_t) oh->file_size_high) << 32) | + (((loff_t) oh->file_size_low) & 0xFFFFFFFF); + else + retval = (loff_t) oh->file_size_low; - return YAFFS_OK; + return retval; } |