/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
* published by the Free Software Foundation.
*/
-const char *yaffs_guts_c_version =
- "$Id: yaffs_guts.c,v 1.92 2009-11-03 02:41:00 charles Exp $";
-
#include "yportenv.h"
+#include "yaffs_trace.h"
-#include "yaffsinterface.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"
-#define YAFFS_PASSIVE_GC_CHUNKS 2
+#include "yaffs_attribs.h"
-#include "yaffs_ecc.h"
+/* 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"
/* 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);
+static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block);
+static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk,
+ int erased_ok);
+static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk,
+ const u8 * data,
+ const struct yaffs_ext_tags *tags);
+static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk,
+ const struct yaffs_ext_tags *tags);
/* Other local prototypes */
-static void yaffs_UpdateParent(yaffs_Object *obj);
-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_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
- int chunkOffset, int *limit);
-static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
+static void yaffs_update_parent(struct yaffs_obj *obj);
+static int yaffs_unlink_obj(struct yaffs_obj *obj);
+static int yaffs_obj_cache_dirty(struct yaffs_obj *obj);
-static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo);
+static int yaffs_write_new_chunk(struct yaffs_dev *dev,
+ const u8 * buffer,
+ struct yaffs_ext_tags *tags, int use_reserver);
+static struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number,
+ enum yaffs_obj_type type);
-static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
- int chunkInNAND);
+static int yaffs_apply_xattrib_mod(struct yaffs_obj *obj, char *buffer,
+ struct yaffs_xattr_mod *xmod);
-static int yaffs_UnlinkWorker(yaffs_Object *obj);
+static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj);
+static int yaffs_generic_obj_del(struct yaffs_obj *in);
-static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
- int chunkInObject);
+static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk);
-static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
- yaffs_BlockInfo **blockUsedPtr);
+static int yaffs_unlink_worker(struct yaffs_obj *obj);
-static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
+static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id,
+ int chunk_obj);
-static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
+static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver,
+ struct yaffs_block_info **block_ptr);
-static void yaffs_VerifyDirectory(yaffs_Object *directory);
-#ifdef YAFFS_PARANOID
-static int yaffs_CheckFileSanity(yaffs_Object *in);
-#else
-#define yaffs_CheckFileSanity(in)
-#endif
+static void yaffs_check_obj_details_loaded(struct yaffs_obj *in);
-static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
-static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
+static void yaffs_invalidate_whole_cache(struct yaffs_obj *in);
+static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object,
+ int chunk_id);
-static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
+static int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
+ struct yaffs_ext_tags *tags);
-static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
- yaffs_ExtendedTags *tags);
-
-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);
+static int yaffs_verify_chunk_written(struct yaffs_dev *dev,
+ int nand_chunk,
+ const u8 * data,
+ struct yaffs_ext_tags *tags);
+static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR * name,
+ const YCHAR * oh_name, int buff_size);
+static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR * oh_name,
+ const YCHAR * name);
/* Function to calculate chunk and offset */
-static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut,
- __u32 *offsetOut)
+static void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr,
+ int *chunk_out, u32 * offset_out)
{
int chunk;
- __u32 offset;
+ u32 offset;
- chunk = (__u32)(addr >> dev->chunkShift);
+ chunk = (u32) (addr >> dev->chunk_shift);
- if (dev->chunkDiv == 1) {
+ if (dev->chunk_div == 1) {
/* easy power of 2 case */
- offset = (__u32)(addr & dev->chunkMask);
+ offset = (u32) (addr & dev->chunk_mask);
} else {
/* Non power-of-2 case */
- loff_t chunkBase;
+ loff_t chunk_base;
- chunk /= dev->chunkDiv;
+ chunk /= dev->chunk_div;
- chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk;
- offset = (__u32)(addr - chunkBase);
+ chunk_base = ((loff_t) chunk) * dev->data_bytes_per_chunk;
+ offset = (u32) (addr - chunk_base);
}
- *chunkOut = chunk;
- *offsetOut = offset;
+ *chunk_out = chunk;
+ *offset_out = offset;
}
/* Function to return the number of shifts for a power of 2 greater than or
* be hellishly efficient.
*/
-static __u32 ShiftsGE(__u32 x)
+static 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++;
+ extra_bits++;
x >>= 1;
- nShifts++;
+ 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 Shifts(__u32 x)
+static u32 calc_shifts(u32 x)
{
- int nShifts;
+ u32 shifts;
- nShifts = 0;
+ shifts = 0;
if (!x)
return 0;
- while (!(x&1)) {
+ while (!(x & 1)) {
x >>= 1;
- nShifts++;
+ 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->totalBytesPerChunk);
+ dev->temp_buffer[i].line = 0; /* not in use */
+ dev->temp_buffer[i].buffer = buf =
+ YMALLOC_DMA(dev->param.total_bytes_per_chunk);
}
return buf ? YAFFS_OK : YAFFS_FAIL;
}
-__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo)
+u8 *yaffs_get_temp_buffer(struct yaffs_dev * dev, int line_no)
{
int i, j;
- dev->tempInUse++;
- if (dev->tempInUse > dev->maxTemp)
- dev->maxTemp = dev->tempInUse;
+ dev->temp_in_use++;
+ if (dev->temp_in_use > dev->max_temp)
+ dev->max_temp = dev->temp_in_use;
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;
+ if (dev->temp_buffer[i].line == 0) {
+ dev->temp_buffer[i].line = line_no;
+ if ((i + 1) > dev->max_temp) {
+ dev->max_temp = i + 1;
for (j = 0; j <= i; j++)
- dev->tempBuffer[j].maxLine =
- dev->tempBuffer[j].line;
+ dev->temp_buffer[j].max_line =
+ dev->temp_buffer[j].line;
}
- return dev->tempBuffer[i].buffer;
+ return dev->temp_buffer[i].buffer;
}
}
T(YAFFS_TRACE_BUFFERS,
(TSTR("Out of temp buffers at line %d, other held by lines:"),
- lineNo));
+ line_no));
for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
- T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line));
+ T(YAFFS_TRACE_BUFFERS,
+ (TSTR(" %d "), dev->temp_buffer[i].line));
T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR)));
* This is not good.
*/
- dev->unmanagedTempAllocations++;
- return YMALLOC(dev->nDataBytesPerChunk);
+ dev->unmanaged_buffer_allocs++;
+ return YMALLOC(dev->data_bytes_per_chunk);
}
-void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer,
- int lineNo)
+void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 * buffer, int line_no)
{
int i;
- dev->tempInUse--;
+ 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].line = 0;
return;
}
}
/* assume it is an unmanaged one. */
T(YAFFS_TRACE_BUFFERS,
(TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),
- lineNo));
+ line_no));
YFREE(buffer);
- dev->unmanagedTempDeallocations++;
+ dev->unmanaged_buffer_deallocs++;
}
}
/*
* 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)
+ for (i = 0; i < dev->param.n_caches; i++) {
+ if (dev->cache[i].data == buffer)
return 1;
}
- if (buffer == dev->checkpointBuffer)
+ if (buffer == dev->checkpt_buffer)
return 1;
T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
+ (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
return 0;
}
-
-
/*
- * Chunk bitmap manipulations
+ * Verification code
*/
-static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
-{
- if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
- blk));
- YBUG();
- }
- return dev->chunkBits +
- (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
-}
-
-static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
-{
- if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
- chunk < 0 || chunk >= dev->nChunksPerBlock) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
- blk, chunk));
- YBUG();
- }
-}
-
-static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
-{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
-
- memset(blkBits, 0, dev->chunkBitmapStride);
-}
-
-static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
-{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
-
- yaffs_VerifyChunkBitId(dev, blk, chunk);
-
- blkBits[chunk / 8] &= ~(1 << (chunk & 7));
-}
+/*
+ * Simple hash function. Needs to have a reasonable spread
+ */
-static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk)
+static Y_INLINE int yaffs_hash_fn(int n)
{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
-
- yaffs_VerifyChunkBitId(dev, blk, chunk);
-
- blkBits[chunk / 8] |= (1 << (chunk & 7));
+ n = abs(n);
+ return n % YAFFS_NOBJECT_BUCKETS;
}
-static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
-{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
- yaffs_VerifyChunkBitId(dev, blk, chunk);
-
- return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
-}
+/*
+ * Access functions to useful fake objects.
+ * Note that root might have a presence in NAND if permissions are set.
+ */
-static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
+struct yaffs_obj *yaffs_root(struct yaffs_dev *dev)
{
- __u8 *blkBits = yaffs_BlockBits(dev, blk);
- int i;
- for (i = 0; i < dev->chunkBitmapStride; i++) {
- if (*blkBits)
- return 1;
- blkBits++;
- }
- return 0;
+ return dev->root_dir;
}
-static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
+struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev)
{
- __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;
+ return dev->lost_n_found;
}
/*
- * Verification code
+ * Erased NAND checking functions
*/
-static int yaffs_SkipVerification(yaffs_Device *dev)
-{
- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
-}
-
-static int yaffs_SkipFullVerification(yaffs_Device *dev)
-{
- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
-}
-
-static int yaffs_SkipNANDVerification(yaffs_Device *dev)
+int yaffs_check_ff(u8 * buffer, int n_bytes)
{
- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
+ /* Horrible, slow implementation */
+ while (n_bytes--) {
+ if (*buffer != 0xFF)
+ return 0;
+ buffer++;
+ }
+ return 1;
}
-static const char *blockStateName[] = {
-"Unknown",
-"Needs scanning",
-"Scanning",
-"Empty",
-"Allocating",
-"Full",
-"Dirty",
-"Checkpoint",
-"Collecting",
-"Dead"
-};
-
-static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
+static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk)
{
- int actuallyUsed;
- int inUse;
+ int retval = YAFFS_OK;
+ u8 *data = yaffs_get_temp_buffer(dev, __LINE__);
+ struct yaffs_ext_tags tags;
+ int result;
- if (yaffs_SkipVerification(dev))
- return;
+ result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags);
- /* Report illegal runtime states */
- if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
+ if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR)
+ retval = YAFFS_FAIL;
- 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]));
+ if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) || tags.chunk_used) {
+ T(YAFFS_TRACE_NANDACCESS,
+ (TSTR("Chunk %d not erased" TENDSTR), nand_chunk));
+ retval = YAFFS_FAIL;
}
- /* Check pages in use and soft deletions are legal */
+ yaffs_release_temp_buffer(dev, data, __LINE__);
- actuallyUsed = bi->pagesInUse - bi->softDeletions;
+ return retval;
- 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));
+}
+static int yaffs_verify_chunk_written(struct yaffs_dev *dev,
+ int nand_chunk,
+ const u8 * data,
+ struct yaffs_ext_tags *tags)
+{
+ int retval = YAFFS_OK;
+ struct yaffs_ext_tags temp_tags;
+ u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__);
+ int result;
- /* 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));
+ 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 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));
+ yaffs_release_temp_buffer(dev, buffer, __LINE__);
+
+ return retval;
}
-static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
- int n)
+static int yaffs_write_new_chunk(struct yaffs_dev *dev,
+ const u8 * data,
+ struct yaffs_ext_tags *tags, int use_reserver)
{
- yaffs_VerifyBlock(dev, bi, n);
+ int attempts = 0;
+ int write_ok = 0;
+ int chunk;
- /* After collection the block should be in the erased state */
- /* This will need to change if we do partial gc */
+ yaffs2_checkpt_invalidate(dev);
- if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
- 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));
- }
-}
+ do {
+ struct yaffs_block_info *bi = 0;
+ int erased_ok = 0;
-static void yaffs_VerifyBlocks(yaffs_Device *dev)
-{
- int i;
- int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
- int nIllegalBlockStates = 0;
+ chunk = yaffs_alloc_chunk(dev, use_reserver, &bi);
+ if (chunk < 0) {
+ /* no space */
+ break;
+ }
- if (yaffs_SkipVerification(dev))
- return;
+ /* First check this chunk is erased, if it needs
+ * checking. The checking policy (unless forced
+ * always on) is as follows:
+ *
+ * Check the first page we try to write in a block.
+ * If the check passes then we don't need to check any
+ * more. If the check fails, we check again...
+ * If the block has been erased, we don't need to check.
+ *
+ * However, if the block has been prioritised for gc,
+ * then we think there might be something odd about
+ * this block and stop using it.
+ *
+ * Rationale: We should only ever see chunks that have
+ * not been erased if there was a partially written
+ * chunk due to power loss. This checking policy should
+ * catch that case with very few checks and thus save a
+ * lot of checks that are most likely not needed.
+ *
+ * Mods to the above
+ * If an erase check fails or the write fails we skip the
+ * rest of the block.
+ */
- memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
+ /* let's give it a try */
+ attempts++;
- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
- yaffs_VerifyBlock(dev, bi, i);
+ if (dev->param.always_check_erased)
+ bi->skip_erased_check = 0;
- if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
- nBlocksPerState[bi->blockState]++;
- else
- nIllegalBlockStates++;
- }
+ if (!bi->skip_erased_check) {
+ erased_ok = yaffs_check_chunk_erased(dev, chunk);
+ if (erased_ok != YAFFS_OK) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("**>> yaffs chunk %d was not erased"
+ TENDSTR), 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;
+ }
+ }
- T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
- T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
+ write_ok = yaffs_wr_chunk_tags_nand(dev, chunk, data, tags);
- 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)));
+ if (!bi->skip_erased_check)
+ write_ok =
+ yaffs_verify_chunk_written(dev, chunk, data, tags);
- for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
- T(YAFFS_TRACE_VERIFY,
- (TSTR("%s %d blocks"TENDSTR),
- blockStateName[i], nBlocksPerState[i]));
+ 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;
+ }
- 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]));
+ bi->skip_erased_check = 1;
- 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]));
+ /* Copy the data into the robustification buffer */
+ yaffs_handle_chunk_wr_ok(dev, chunk, data, tags);
- 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]));
+ } while (write_ok != YAFFS_OK &&
+ (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
- T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
+ if (!write_ok)
+ chunk = -1;
+
+ if (attempts > 1) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("**>> yaffs write required %d attempts" TENDSTR),
+ attempts));
+ dev->n_retired_writes += (attempts - 1);
+ }
+
+ return chunk;
}
/*
- * Verify the object header. oh must be valid, but obj and tags may be NULL in which
- * case those tests will not be performed.
+ * Block retiring for handling a broken block.
*/
-static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
-{
- if (obj && 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));
+static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block)
+{
+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block);
+ yaffs2_checkpt_invalidate(dev);
- /*
- * Check that the object's parent ids match if parentCheck requested.
- *
- * Tests do not apply to the root object.
- */
+ yaffs2_clear_oldest_dirty_seq(dev, bi);
- 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));
+ if (yaffs_mark_bad(dev, flash_block) != YAFFS_OK) {
+ if (yaffs_erase_block(dev, flash_block) != YAFFS_OK) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+ ("yaffs: Failed to mark bad and erase block %d"
+ TENDSTR), flash_block));
+ } else {
+ struct yaffs_ext_tags tags;
+ int chunk_id =
+ flash_block * dev->param.chunks_per_block;
+
+ u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__);
+
+ memset(buffer, 0xff, dev->data_bytes_per_chunk);
+ yaffs_init_tags(&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)
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+ ("yaffs: Failed to "
+ TCONT("write bad block marker to block %d")
+ TENDSTR), flash_block));
- 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));
+ yaffs_release_temp_buffer(dev, buffer, __LINE__);
+ }
+ }
- if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d header name is NULL"TENDSTR),
- obj->objectId));
+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
+ bi->gc_prioritise = 0;
+ bi->needs_retiring = 0;
- 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));
+ dev->n_retired_blocks++;
}
+/*
+ * Functions for robustisizing TODO
+ *
+ */
-
-static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
- __u32 level, int chunkOffset)
+static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk,
+ const u8 * data,
+ const struct yaffs_ext_tags *tags)
{
- int i;
- yaffs_Device *dev = obj->myDev;
- int ok = 1;
-
- if (tn) {
- if (level > 0) {
+ dev = dev;
+ nand_chunk = nand_chunk;
+ data = data;
+ tags = tags;
+}
- for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
- if (tn->internal[i]) {
- ok = yaffs_VerifyTnodeWorker(obj,
- tn->internal[i],
- level - 1,
- (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
- }
- }
- } else if (level == 0) {
- yaffs_ExtendedTags tags;
- __u32 objectId = obj->objectId;
+static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk,
+ const struct yaffs_ext_tags *tags)
+{
+ dev = dev;
+ nand_chunk = nand_chunk;
+ tags = tags;
+}
- chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
+void yaffs_handle_chunk_error(struct yaffs_dev *dev,
+ struct yaffs_block_info *bi)
+{
+ if (!bi->gc_prioritise) {
+ bi->gc_prioritise = 1;
+ dev->has_pending_prioritised_gc = 1;
+ bi->chunk_error_strikes++;
- for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
- __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+ if (bi->chunk_error_strikes > 3) {
+ bi->needs_retiring = 1; /* Too many stikes, so retire this */
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: Block struck out" TENDSTR)));
- if (theChunk > 0) {
- /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
- yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
- if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
- T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
- objectId, chunkOffset, theChunk,
- tags.objectId, tags.chunkId));
- }
- }
- chunkOffset++;
- }
}
}
-
- return ok;
-
}
-
-static void yaffs_VerifyFile(yaffs_Object *obj)
+static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk,
+ int erased_ok)
{
- int requiredTallness;
- int actualTallness;
- __u32 lastChunk;
- __u32 x;
- __u32 i;
- yaffs_Device *dev;
- yaffs_ExtendedTags tags;
- yaffs_Tnode *tn;
- __u32 objectId;
+ int flash_block = nand_chunk / dev->param.chunks_per_block;
+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block);
- if (!obj)
- return;
-
- if (yaffs_SkipVerification(obj->myDev))
- return;
+ yaffs_handle_chunk_error(dev, bi);
- dev = obj->myDev;
- objectId = obj->objectId;
-
- /* 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++;
+ if (erased_ok) {
+ /* Was an actual write failure, so mark the block for retirement */
+ bi->needs_retiring = 1;
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("**>> Block %d needs retiring" TENDSTR), flash_block));
}
- 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));
+ /* Delete the chunk */
+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
+ yaffs_skip_rest_of_block(dev);
+}
+/*---------------- Name handling functions ------------*/
- /* 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.
- */
+static u16 yaffs_calc_name_sum(const YCHAR * name)
+{
+ u16 sum = 0;
+ u16 i = 1;
- if (yaffs_SkipNANDVerification(dev))
- return;
+ const YUCHAR *bname = (const YUCHAR *)name;
+ if (bname) {
+ while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH / 2))) {
- for (i = 1; i <= lastChunk; i++) {
- tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
-
- 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));
- }
- }
+ /* 0x1f mask is case insensitive */
+ sum += ((*bname) & 0x1f) * i;
+ i++;
+ bname++;
}
}
+ return sum;
}
-
-static void yaffs_VerifyHardLink(yaffs_Object *obj)
+void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name)
{
- if (obj && yaffs_SkipVerification(obj->myDev))
- return;
+#ifndef CONFIG_YAFFS_NO_SHORT_NAMES
+ 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');
+#endif
+ obj->sum = yaffs_calc_name_sum(name);
+}
- /* Verify sane equivalent object */
+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
+ yaffs_set_obj_name(obj, oh->name);
+#endif
}
-static void yaffs_VerifySymlink(yaffs_Object *obj)
+/*-------------------- TNODES -------------------
+
+ * List of spare tnodes
+ * The list is hooked together using the first pointer
+ * in the tnode.
+ */
+
+struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev)
{
- if (obj && yaffs_SkipVerification(obj->myDev))
- return;
+ struct yaffs_tnode *tn = yaffs_alloc_raw_tnode(dev);
+ if (tn) {
+ memset(tn, 0, dev->tnode_size);
+ dev->n_tnodes++;
+ }
- /* Verify symlink string */
+ dev->checkpoint_blocks_required = 0; /* force recalculation */
+
+ return tn;
}
-static void yaffs_VerifySpecial(yaffs_Object *obj)
+/* FreeTnode frees up a tnode and puts it back on the free list */
+static void yaffs_free_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn)
{
- if (obj && yaffs_SkipVerification(obj->myDev))
- return;
+ yaffs_free_raw_tnode(dev, tn);
+ dev->n_tnodes--;
+ dev->checkpoint_blocks_required = 0; /* force recalculation */
}
-static void yaffs_VerifyObject(yaffs_Object *obj)
+static void yaffs_deinit_tnodes_and_objs(struct yaffs_dev *dev)
{
- yaffs_Device *dev;
+ yaffs_deinit_raw_tnodes_and_objs(dev);
+ dev->n_obj = 0;
+ dev->n_tnodes = 0;
+}
- __u32 chunkMin;
- __u32 chunkMax;
+void yaffs_load_tnode_0(struct yaffs_dev *dev, struct yaffs_tnode *tn,
+ unsigned pos, unsigned val)
+{
+ u32 *map = (u32 *) tn;
+ u32 bit_in_map;
+ u32 bit_in_word;
+ u32 word_in_map;
+ u32 mask;
- __u32 chunkIdOk;
- __u32 chunkInRange;
- __u32 chunkShouldNotBeDeleted;
- __u32 chunkValid;
+ pos &= YAFFS_TNODES_LEVEL0_MASK;
+ val >>= dev->chunk_grp_bits;
- if (!obj)
- return;
+ bit_in_map = pos * dev->tnode_width;
+ word_in_map = bit_in_map / 32;
+ bit_in_word = bit_in_map & (32 - 1);
- if (obj->beingCreated)
- return;
+ mask = dev->tnode_mask << bit_in_word;
- dev = obj->myDev;
+ map[word_in_map] &= ~mask;
+ map[word_in_map] |= (mask & (val << bit_in_word));
- if (yaffs_SkipVerification(dev))
- return;
+ if (dev->tnode_width > (32 - bit_in_word)) {
+ bit_in_word = (32 - bit_in_word);
+ word_in_map++;;
+ mask =
+ dev->tnode_mask >> ( /*dev->tnode_width - */ bit_in_word);
+ map[word_in_map] &= ~mask;
+ map[word_in_map] |= (mask & (val >> bit_in_word));
+ }
+}
- /* Check sane object header chunk */
+u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn,
+ unsigned pos)
+{
+ u32 *map = (u32 *) tn;
+ u32 bit_in_map;
+ u32 bit_in_word;
+ u32 word_in_map;
+ u32 val;
- chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
- chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
+ pos &= YAFFS_TNODES_LEVEL0_MASK;
- chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
- chunkIdOk = chunkInRange || (obj->hdrChunk == 0);
- chunkValid = chunkInRange &&
- yaffs_CheckChunkBit(dev,
- obj->hdrChunk / dev->nChunksPerBlock,
- obj->hdrChunk % dev->nChunksPerBlock);
- chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
+ bit_in_map = pos * dev->tnode_width;
+ word_in_map = bit_in_map / 32;
+ bit_in_word = bit_in_map & (32 - 1);
- if (!obj->fake &&
- (!chunkIdOk || chunkShouldNotBeDeleted)) {
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
- obj->objectId, obj->hdrChunk,
- chunkIdOk ? "" : ",out of range",
- chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
+ val = map[word_in_map] >> bit_in_word;
+
+ 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);
}
- if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
- yaffs_ExtendedTags tags;
- yaffs_ObjectHeader *oh;
- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+ val &= dev->tnode_mask;
+ val <<= dev->chunk_grp_bits;
- oh = (yaffs_ObjectHeader *)buffer;
+ return val;
+}
- yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
- &tags);
+/* ------------------- End of individual tnode manipulation -----------------*/
- yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
+/* ---------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 top_level
+ * in the tree. 0 means only the level 0 tnode is in the tree.
+ */
- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
- }
-
- /* 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));
- }
-
- /* 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));
- }
-
- 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;
- }
-}
-
-static void yaffs_VerifyObjects(yaffs_Device *dev)
-{
- yaffs_Object *obj;
- int i;
- struct ylist_head *lh;
-
- if (yaffs_SkipVerification(dev))
- return;
-
- /* Iterate through the objects in each hash entry */
-
- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
- ylist_for_each(lh, &dev->objectBucket[i].list) {
- if (lh) {
- obj = ylist_entry(lh, yaffs_Object, hashLink);
- yaffs_VerifyObject(obj);
- }
- }
- }
-}
-
-
-/*
- * Simple hash function. Needs to have a reasonable spread
- */
-
-static Y_INLINE int yaffs_HashFunction(int n)
-{
- n = abs(n);
- return n % YAFFS_NOBJECT_BUCKETS;
-}
-
-/*
- * Access functions to useful fake objects.
- * Note that root might have a presence in NAND if permissions are set.
- */
-
-yaffs_Object *yaffs_Root(yaffs_Device *dev)
-{
- return dev->rootDir;
-}
-
-yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
-{
- return dev->lostNFoundDir;
-}
-
-
-/*
- * Erased NAND checking functions
- */
-
-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)
-{
- int retval = YAFFS_OK;
- __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
- yaffs_ExtendedTags tags;
- int result;
-
- result = 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;
- }
-
- yaffs_ReleaseTempBuffer(dev, data, __LINE__);
-
- return retval;
-
-}
-
-static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
- const __u8 *data,
- yaffs_ExtendedTags *tags,
- int useReserve)
-{
- int attempts = 0;
- int writeOk = 0;
- int chunk;
-
- yaffs_InvalidateCheckpoint(dev);
-
- do {
- yaffs_BlockInfo *bi = 0;
- int erasedOk = 0;
-
- chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
- if (chunk < 0) {
- /* no space */
- break;
- }
-
- /* First check this chunk is erased, if it needs
- * checking. The checking policy (unless forced
- * always on) is as follows:
- *
- * Check the first page we try to write in a block.
- * If the check passes then we don't need to check any
- * more. If the check fails, we check again...
- * If the block has been erased, we don't need to check.
- *
- * However, if the block has been prioritised for gc,
- * then we think there might be something odd about
- * this block and stop using it.
- *
- * Rationale: We should only ever see chunks that have
- * not been erased if there was a partially written
- * chunk due to power loss. This checking policy should
- * catch that case with very few checks and thus save a
- * lot of checks that are most likely not needed.
- */
- if (bi->gcPrioritise) {
- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
- /* 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));
-
- /* try another chunk */
- continue;
- }
- bi->skipErasedCheck = 1;
- }
-
- writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
- data, tags);
- if (writeOk != YAFFS_OK) {
- yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
- /* try another chunk */
- continue;
- }
-
- /* Copy the data into the robustification buffer */
- yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
-
- } while (writeOk != YAFFS_OK &&
- (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
-
- if (!writeOk)
- chunk = -1;
-
- if (attempts > 1) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs write required %d attempts" TENDSTR),
- attempts));
-
- dev->nRetriedWrites += (attempts - 1);
- }
-
- return chunk;
-}
-
-/*
- * Block retiring for handling a broken block.
- */
-
-static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
-{
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
-
- yaffs_InvalidateCheckpoint(dev);
-
- if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
- if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
- T(YAFFS_TRACE_ALWAYS, (TSTR(
- "yaffs: Failed to mark bad and erase block %d"
- TENDSTR), blockInNAND));
- } else {
- yaffs_ExtendedTags tags;
- int chunkId = blockInNAND * dev->nChunksPerBlock;
-
- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
-
- memset(buffer, 0xff, dev->nDataBytesPerChunk);
- yaffs_InitialiseTags(&tags);
- tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
- if (dev->writeChunkWithTagsToNAND(dev, chunkId -
- dev->chunkOffset, buffer, &tags) != YAFFS_OK)
- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
- TCONT("write bad block marker to block %d")
- TENDSTR), blockInNAND));
-
- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
- }
- }
-
- bi->blockState = YAFFS_BLOCK_STATE_DEAD;
- bi->gcPrioritise = 0;
- bi->needsRetiring = 0;
-
- dev->nRetiredBlocks++;
-}
-
-/*
- * Functions for robustisizing TODO
- *
- */
-
-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)
-{
-}
-
-void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
-{
- if (!bi->gcPrioritise) {
- bi->gcPrioritise = 1;
- dev->hasPendingPrioritisedGCs = 1;
- bi->chunkErrorStrikes++;
-
- if (bi->chunkErrorStrikes > 3) {
- bi->needsRetiring = 1; /* Too many stikes, so retire this */
- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
-
- }
- }
-}
-
-static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
- int erasedOk)
-{
- int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
-
- yaffs_HandleChunkError(dev, bi);
-
- if (erasedOk) {
- /* Was an actual write failure, so mark the block for retirement */
- bi->needsRetiring = 1;
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
- }
-
- /* Delete the chunk */
- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
-}
-
-
-/*---------------- Name handling functions ------------*/
-
-static __u16 yaffs_CalcNameSum(const YCHAR *name)
-{
- __u16 sum = 0;
- __u16 i = 1;
-
- const YUCHAR *bname = (const YUCHAR *) name;
- if (bname) {
- while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
-
-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
- sum += yaffs_toupper(*bname) * i;
-#else
- sum += (*bname) * i;
-#endif
- i++;
- bname++;
- }
- }
- return sum;
-}
-
-static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
-{
-#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
- memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
- 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);
-}
-
-/*-------------------- TNODES -------------------
-
- * List of spare tnodes
- * The list is hooked together using the first pointer
- * 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)
-{
- int i;
- int tnodeSize;
- yaffs_Tnode *newTnodes;
- __u8 *mem;
- yaffs_Tnode *curr;
- yaffs_Tnode *next;
- yaffs_TnodeList *tnl;
-
- if (nTnodes < 1)
- return YAFFS_OK;
-
- /* Calculate the tnode size in bytes for variable width tnode support.
- * Must be a multiple of 32-bits */
- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
- /* 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--;
- }
-
- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
-
- return tn;
-}
-
-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
-{
- yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
- if (tn)
- memset(tn, 0, tnodeSize);
-
- 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)
-{
- 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++;
- }
- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
-}
-
-static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
-{
- /* Free the list of allocated tnodes */
- yaffs_TnodeList *tmp;
-
- while (dev->allocatedTnodeList) {
- tmp = dev->allocatedTnodeList->next;
-
- YFREE(dev->allocatedTnodeList->tnodes);
- YFREE(dev->allocatedTnodeList);
- dev->allocatedTnodeList = tmp;
-
- }
-
- dev->freeTnodes = NULL;
- dev->nFreeTnodes = 0;
-}
-
-static void yaffs_InitialiseTnodes(yaffs_Device *dev)
-{
- dev->allocatedTnodeList = NULL;
- dev->freeTnodes = NULL;
- dev->nFreeTnodes = 0;
- dev->nTnodesCreated = 0;
-}
-
-
-void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
- unsigned val)
-{
- __u32 *map = (__u32 *)tn;
- __u32 bitInMap;
- __u32 bitInWord;
- __u32 wordInMap;
- __u32 mask;
-
- pos &= YAFFS_TNODES_LEVEL0_MASK;
- val >>= dev->chunkGroupBits;
-
- bitInMap = pos * dev->tnodeWidth;
- wordInMap = bitInMap / 32;
- bitInWord = bitInMap & (32 - 1);
-
- mask = dev->tnodeMask << bitInWord;
-
- map[wordInMap] &= ~mask;
- map[wordInMap] |= (mask & (val << bitInWord));
-
- if (dev->tnodeWidth > (32 - bitInWord)) {
- bitInWord = (32 - bitInWord);
- wordInMap++;;
- mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
- map[wordInMap] &= ~mask;
- map[wordInMap] |= (mask & (val >> bitInWord));
- }
-}
-
-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
- unsigned pos)
-{
- __u32 *map = (__u32 *)tn;
- __u32 bitInMap;
- __u32 bitInWord;
- __u32 wordInMap;
- __u32 val;
-
- pos &= YAFFS_TNODES_LEVEL0_MASK;
-
- bitInMap = pos * dev->tnodeWidth;
- wordInMap = bitInMap / 32;
- bitInWord = bitInMap & (32 - 1);
-
- val = map[wordInMap] >> bitInWord;
-
- if (dev->tnodeWidth > (32 - bitInWord)) {
- bitInWord = (32 - bitInWord);
- wordInMap++;;
- val |= (map[wordInMap] << bitInWord);
- }
-
- val &= dev->tnodeMask;
- val <<= dev->chunkGroupBits;
-
- return val;
-}
-
-/* ------------------- End of individual tnode manipulation -----------------*/
-
-/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
- * The look up tree is represented by the top tnode and the number of topLevel
- * 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)
-{
- yaffs_Tnode *tn = fStruct->top;
- __u32 i;
- int requiredTallness;
- int level = fStruct->topLevel;
-
- /* Check sane level and chunk Id */
- if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
- return NULL;
-
- if (chunkId > YAFFS_MAX_CHUNK_ID)
- return NULL;
-
- /* First check we're tall enough (ie enough topLevel) */
-
- i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
- requiredTallness = 0;
- while (i) {
- i >>= YAFFS_TNODES_INTERNAL_BITS;
- requiredTallness++;
- }
-
- if (requiredTallness > fStruct->topLevel)
- 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];
- level--;
- }
-
- return tn;
-}
-
-/* AddOrFindLevel0Tnode 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.
- */
-
-static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
- yaffs_FileStructure *fStruct,
- __u32 chunkId,
- yaffs_Tnode *passedTn)
-{
- int requiredTallness;
- int i;
- int l;
- yaffs_Tnode *tn;
-
- __u32 x;
-
-
- /* Check sane level and page Id */
- if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
- return NULL;
-
- if (chunkId > YAFFS_MAX_CHUNK_ID)
- return NULL;
-
- /* First check we're tall enough (ie enough topLevel) */
-
- x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
- requiredTallness = 0;
- while (x) {
- x >>= YAFFS_TNODES_INTERNAL_BITS;
- requiredTallness++;
- }
-
-
- if (requiredTallness > fStruct->topLevel) {
- /* Not tall enough, gotta make the tree taller */
- for (i = fStruct->topLevel; i < requiredTallness; i++) {
-
- tn = yaffs_GetTnode(dev);
-
- if (tn) {
- tn->internal[0] = fStruct->top;
- fStruct->top = tn;
- } else {
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs: no more tnodes" TENDSTR)));
- }
- }
-
- fStruct->topLevel = requiredTallness;
- }
-
- /* Traverse down to level 0, adding anything we need */
-
- l = fStruct->topLevel;
- tn = fStruct->top;
-
- if (l > 0) {
- while (l > 0 && tn) {
- x = (chunkId >>
- (YAFFS_TNODES_LEVEL0_BITS +
- (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
- YAFFS_TNODES_INTERNAL_MASK;
-
-
- if ((l > 1) && !tn->internal[x]) {
- /* Add missing non-level-zero tnode */
- tn->internal[x] = yaffs_GetTnode(dev);
-
- } else if (l == 1) {
- /* Looking from level 1 at level 0 */
- if (passedTn) {
- /* If we already have one, then release it.*/
- if (tn->internal[x])
- yaffs_FreeTnode(dev, tn->internal[x]);
- tn->internal[x] = passedTn;
-
- } else if (!tn->internal[x]) {
- /* Don't have one, none passed in */
- tn->internal[x] = yaffs_GetTnode(dev);
- }
- }
-
- tn = tn->internal[x];
- l--;
- }
- } else {
- /* top is level 0 */
- if (passedTn) {
- memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
- yaffs_FreeTnode(dev, passedTn);
- }
- }
-
- return tn;
-}
-
-static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
- yaffs_ExtendedTags *tags, int objectId,
- int chunkInInode)
-{
- int j;
-
- for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
- if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock,
- theChunk % dev->nChunksPerBlock)) {
-
- if(dev->chunkGroupSize == 1)
- return theChunk;
- else {
- yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
- tags);
- if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
- /* found it; */
- return theChunk;
- }
- }
- }
- theChunk++;
- }
- return -1;
-}
-
-
-/* DeleteWorker scans backwards through the tnode tree and deletes all the
- * chunks and tnodes in the file
- * Returns 1 if the tree was deleted.
- * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
- */
-
-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
- int chunkOffset, int *limit)
-{
- int i;
- int chunkInInode;
- int theChunk;
- yaffs_ExtendedTags tags;
- int foundChunk;
- yaffs_Device *dev = in->myDev;
-
- int allDone = 1;
-
- if (tn) {
- if (level > 0) {
- for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
- i--) {
- if (tn->internal[i]) {
- if (limit && (*limit) < 0) {
- allDone = 0;
- } else {
- allDone =
- yaffs_DeleteWorker(in,
- tn->
- internal
- [i],
- level -
- 1,
- (chunkOffset
- <<
- YAFFS_TNODES_INTERNAL_BITS)
- + i,
- limit);
- }
- if (allDone) {
- yaffs_FreeTnode(dev,
- tn->
- internal[i]);
- tn->internal[i] = NULL;
- }
- }
- }
- return (allDone) ? 1 : 0;
- } else if (level == 0) {
- int hitLimit = 0;
-
- for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
- i--) {
- theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
- if (theChunk) {
-
- chunkInInode = (chunkOffset <<
- YAFFS_TNODES_LEVEL0_BITS) + i;
-
- foundChunk =
- yaffs_FindChunkInGroup(dev,
- theChunk,
- &tags,
- in->objectId,
- chunkInInode);
-
- if (foundChunk > 0) {
- yaffs_DeleteChunk(dev,
- foundChunk, 1,
- __LINE__);
- in->nDataChunks--;
- if (limit) {
- *limit = *limit - 1;
- if (*limit <= 0)
- hitLimit = 1;
- }
-
- }
-
- yaffs_PutLevel0Tnode(dev, tn, i, 0);
- }
-
- }
- return (i < 0) ? 1 : 0;
-
- }
-
- }
-
- return 1;
-
-}
-
-static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
-{
- 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++;
- }
-}
-
-/* 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.
- */
-
-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) {
- if (level > 0) {
-
- 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;
-
- }
-
- }
-
- return 1;
-
-}
-
-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;
- }
- }
-}
-
-/* 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.
- */
-
-static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
- __u32 level, int del0)
-{
- int i;
- int hasData;
-
- if (tn) {
- hasData = 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);
- }
-
- if (tn->internal[i])
- hasData++;
- }
-
- if (hasData == 0 && del0) {
- /* Free and return NULL */
-
- yaffs_FreeTnode(dev, tn);
- tn = NULL;
- }
-
- }
-
- return tn;
-
-}
-
-static int yaffs_PruneFileStructure(yaffs_Device *dev,
- yaffs_FileStructure *fStruct)
-{
- int i;
- int hasData;
- int done = 0;
- yaffs_Tnode *tn;
-
- if (fStruct->topLevel > 0) {
- fStruct->top =
- yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
-
- /* 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)
- */
-
- while (fStruct->topLevel && !done) {
- tn = fStruct->top;
-
- hasData = 0;
- for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
- if (tn->internal[i])
- hasData++;
- }
-
- if (!hasData) {
- fStruct->top = tn->internal[0];
- fStruct->topLevel--;
- yaffs_FreeTnode(dev, tn);
- } else {
- done = 1;
- }
- }
- }
-
- return YAFFS_OK;
-}
-
-/*-------------------- End of File Structure functions.-------------------*/
-
-/* 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;
-
- /* make these things */
- newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
- list = YMALLOC(sizeof(yaffs_ObjectList));
-
- 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;
- }
-
- /* Hook them into the free list */
- for (i = 0; i < nObjects - 1; i++) {
- newObjects[i].siblings.next =
- (struct ylist_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. */
-
- list->objects = newObjects;
- list->next = dev->allocatedObjectList;
- dev->allocatedObjectList = list;
-
- 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)
-{
- yaffs_Object *tn = NULL;
-
-#ifdef VALGRIND_TEST
- tn = YMALLOC(sizeof(yaffs_Object));
-#else
- /* If there are none left make more */
- if (!dev->freeObjects)
- yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
-
- if (dev->freeObjects) {
- tn = dev->freeObjects;
- dev->freeObjects =
- (yaffs_Object *) (dev->freeObjects->siblings.next);
- dev->nFreeObjects--;
- }
-#endif
- if (tn) {
- /* Now sweeten it up... */
-
- memset(tn, 0, sizeof(yaffs_Object));
- tn->beingCreated = 1;
-
- tn->myDev = dev;
- tn->hdrChunk = 0;
- tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
- YINIT_LIST_HEAD(&(tn->hardLinks));
- YINIT_LIST_HEAD(&(tn->hashLink));
- YINIT_LIST_HEAD(&tn->siblings);
-
-
- /* Now make the directory sane */
- if (dev->rootDir) {
- tn->parent = dev->rootDir;
- ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
- }
-
- /* 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);
-
- tn->beingCreated = 0;
- }
-
- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
-
- return tn;
-}
-
-static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
- __u32 mode)
-{
-
- yaffs_Object *obj =
- yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
- if (obj) {
- obj->fake = 1; /* it is fake so it might have 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->hdrChunk = 0; /* Not a valid chunk. */
- }
-
- return obj;
-
-}
-
-static void yaffs_UnhashObject(yaffs_Object *tn)
-{
- int bucket;
- yaffs_Device *dev = tn->myDev;
-
- /* If it is still linked into the bucket list, free from the list */
- if (!ylist_empty(&tn->hashLink)) {
- ylist_del_init(&tn->hashLink);
- bucket = yaffs_HashFunction(tn->objectId);
- dev->objectBucket[bucket].count--;
- }
-}
-
-/* FreeObject frees up a Object and puts it back on the free list */
-static void yaffs_FreeObject(yaffs_Object *tn)
-{
- yaffs_Device *dev = tn->myDev;
-
-#ifdef __KERNEL__
- T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
-#endif
-
- if (tn->parent)
- YBUG();
- if (!ylist_empty(&tn->siblings))
- YBUG();
-
-
-#ifdef __KERNEL__
- if (tn->myInode) {
- /* We're still hooked up to a cached inode.
- * Don't delete now, but mark for later deletion
- */
- tn->deferedFree = 1;
- return;
- }
-#endif
-
- yaffs_UnhashObject(tn);
-
-#ifdef VALGRIND_TEST
- YFREE(tn);
-#else
- /* Link into the free list. */
- tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
- dev->freeObjects = tn;
- dev->nFreeObjects++;
-#endif
- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
-}
-
-#ifdef __KERNEL__
-
-void yaffs_HandleDeferedFree(yaffs_Object *obj)
-{
- if (obj->deferedFree)
- yaffs_FreeObject(obj);
-}
-
-#endif
-
-static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
-{
- /* Free the list of allocated Objects */
-
- yaffs_ObjectList *tmp;
-
- while (dev->allocatedObjectList) {
- tmp = dev->allocatedObjectList->next;
- YFREE(dev->allocatedObjectList->objects);
- YFREE(dev->allocatedObjectList);
-
- dev->allocatedObjectList = tmp;
- }
-
- dev->freeObjects = NULL;
- dev->nFreeObjects = 0;
-}
-
-static void yaffs_InitialiseObjects(yaffs_Device *dev)
-{
- int i;
-
- dev->allocatedObjectList = NULL;
- dev->freeObjects = NULL;
- dev->nFreeObjects = 0;
-
- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
- YINIT_LIST_HEAD(&dev->objectBucket[i].list);
- dev->objectBucket[i].count = 0;
- }
-}
-
-static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
-{
- static int x;
- int i;
- int l = 999;
- int lowest = 999999;
-
- /* 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
- */
-
- 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;
- }
-
- }
-
- return l;
-}
-
-static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
-{
- int bucket = yaffs_FindNiceObjectBucket(dev);
-
- /* Now find an object value that has not already been taken
- * by scanning the list.
- */
-
- int found = 0;
- struct ylist_head *i;
-
- __u32 n = (__u32) bucket;
-
- /* yaffs_CheckObjectHashSanity(); */
-
- while (!found) {
- found = 1;
- n += YAFFS_NOBJECT_BUCKETS;
- if (1 || dev->objectBucket[bucket].count > 0) {
- ylist_for_each(i, &dev->objectBucket[bucket].list) {
- /* If there is already one in the list */
- if (i && ylist_entry(i, yaffs_Object,
- hashLink)->objectId == n) {
- found = 0;
- }
- }
- }
- }
-
- return n;
-}
-
-static void yaffs_HashObject(yaffs_Object *in)
-{
- int bucket = yaffs_HashFunction(in->objectId);
- yaffs_Device *dev = in->myDev;
-
- ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
- dev->objectBucket[bucket].count++;
-}
-
-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
-{
- int bucket = yaffs_HashFunction(number);
- struct ylist_head *i;
- yaffs_Object *in;
-
- ylist_for_each(i, &dev->objectBucket[bucket].list) {
- /* Look if it is in the list */
- if (i) {
- in = ylist_entry(i, yaffs_Object, hashLink);
- if (in->objectId == number) {
-#ifdef __KERNEL__
- /* Don't tell the VFS about this one if it is defered free */
- if (in->deferedFree)
- return NULL;
-#endif
-
- return in;
- }
- }
- }
-
- return NULL;
-}
-
-yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
- yaffs_ObjectType type)
-{
- yaffs_Object *theObject;
- yaffs_Tnode *tn = NULL;
-
- if (number < 0)
- number = yaffs_CreateNewObjectNumber(dev);
-
- theObject = yaffs_AllocateEmptyObject(dev);
- if (!theObject)
- return NULL;
-
- if (type == YAFFS_OBJECT_TYPE_FILE) {
- tn = yaffs_GetTnode(dev);
- if (!tn) {
- yaffs_FreeObject(theObject);
- return NULL;
- }
- }
-
- 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];
-
-#else
-
- 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:
- YINIT_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;
- }
- }
-
- return theObject;
-}
-
-static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
- int number,
- yaffs_ObjectType type)
-{
- yaffs_Object *theObject = NULL;
-
- if (number > 0)
- theObject = yaffs_FindObjectByNumber(dev, number);
-
- if (!theObject)
- theObject = yaffs_CreateNewObject(dev, number, type);
-
- return theObject;
-
-}
-
-
-static YCHAR *yaffs_CloneString(const YCHAR *str)
-{
- YCHAR *newStr = NULL;
-
- if (str && *str) {
- newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
- if (newStr)
- yaffs_strcpy(newStr, str);
- }
-
- return newStr;
-
-}
-
-/*
- * 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)
- */
-
-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)
-{
- yaffs_Object *in;
- YCHAR *str = NULL;
-
- yaffs_Device *dev = parent->myDev;
-
- /* 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;
-
- in = yaffs_CreateNewObject(dev, -1, type);
-
- if (!in)
- return YAFFS_FAIL;
-
- if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
- str = yaffs_CloneString(aliasString);
- if (!str) {
- yaffs_FreeObject(in);
- return NULL;
- }
- }
-
-
-
- if (in) {
- in->hdrChunk = 0;
- 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;
- ylist_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;
- }
-
- if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
- /* Could not create the object header, fail the creation */
- yaffs_DeleteObject(in);
- in = NULL;
- }
-
- yaffs_UpdateParent(parent);
- }
-
- return in;
-}
-
-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_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
- __u32 mode, __u32 uid, __u32 gid)
-{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
- mode, uid, gid, NULL, NULL, 0);
-}
-
-yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
- __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
-{
- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
- uid, gid, NULL, NULL, rdev);
-}
-
-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);
-}
-
-/* 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);
-
- if (yaffs_MknodObject
- (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
- equivalentObject, NULL, 0)) {
- return equivalentObject;
- } else {
- return NULL;
- }
-
-}
-
-static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
- const YCHAR *newName, int force, int shadows)
-{
- 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
- ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
- TENDSTR)));
- YBUG();
- }
-
- /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
- if (obj->myDev->isYaffs2)
- unlinkOp = (newDir == obj->myDev->unlinkedDir);
- else
- unlinkOp = (newDir == obj->myDev->unlinkedDir
- && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
-
- deleteOp = (newDir == obj->myDev->deletedDir);
-
- existingTarget = yaffs_FindObjectByName(newDir, newName);
-
- /* 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;
-
- yaffs_AddObjectToDirectory(newDir, obj);
-
- if (unlinkOp)
- obj->unlinked = 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;
- }
-
- return YAFFS_FAIL;
-}
-
-int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
- yaffs_Object *newDir, const YCHAR *newName)
-{
- yaffs_Object *obj = NULL;
- yaffs_Object *existingTarget = NULL;
- int force = 0;
- int result;
- yaffs_Device *dev;
-
-
- if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
- YBUG();
- if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
- YBUG();
-
- dev = oldDir->myDev;
-
-#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(yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
- /* ENAMETOOLONG */
- return YAFFS_FAIL;
-
- obj = yaffs_FindObjectByName(oldDir, oldName);
-
- if (obj && obj->renameAllowed) {
-
- /* Now do the handling for an existing target, if there is one */
-
- existingTarget = yaffs_FindObjectByName(newDir, newName);
- if (existingTarget &&
- existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
- !ylist_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.
- *
- * Note we must disable gc otherwise it can mess up the shadowing.
- *
- */
- dev->isDoingGC=1;
- yaffs_ChangeObjectName(obj, newDir, newName, force,
- existingTarget->objectId);
- existingTarget->isShadowed = 1;
- yaffs_UnlinkObject(existingTarget);
- dev->isDoingGC=0;
- }
-
- result = yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
-
- yaffs_UpdateParent(oldDir);
- if(newDir != oldDir)
- yaffs_UpdateParent(newDir);
-
- return result;
- }
- return YAFFS_FAIL;
-}
-
-/*------------------------- Block Management and Page Allocation ----------------*/
-
-static int yaffs_InitialiseBlocks(yaffs_Device *dev)
-{
- int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
-
- dev->blockInfo = NULL;
- dev->chunkBits = NULL;
-
- dev->allocationBlock = -1; /* force it to get a new one */
-
- /* 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;
-
- if (dev->blockInfo) {
- /* 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;
- }
-
- if (dev->blockInfo && dev->chunkBits) {
- memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
- memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
- return YAFFS_OK;
- }
-
- 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);
-
- dev->blockInfoAlt = 0;
-
- dev->blockInfo = NULL;
-
- if (dev->chunkBitsAlt && dev->chunkBits)
- YFREE_ALT(dev->chunkBits);
- else if (dev->chunkBits)
- YFREE(dev->chunkBits);
- dev->chunkBitsAlt = 0;
- dev->chunkBits = NULL;
-}
-
-static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
- yaffs_BlockInfo *bi)
-{
- int i;
- __u32 seq;
- yaffs_BlockInfo *b;
-
- if (!dev->isYaffs2)
- return 1; /* disqualification only applies to yaffs2. */
-
- if (!bi->hasShrinkHeader)
- return 1; /* can gc */
-
- /* Find the oldest dirty sequence number if we don't know it and save it
- * so we don't have to keep recomputing it.
- */
- 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;
- }
- }
- 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);
-}
-
-/* FindDiretiestBlock is used to select the dirtiest block (or close enough)
- * for garbage collection.
- */
-
-static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
- int aggressive)
-{
- 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); */
-
- if (bi->gcPrioritise) {
- pendingPrioritisedExist = 1;
- if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
- pagesInUse = (bi->pagesInUse - bi->softDeletions);
- dirtiest = i;
- prioritised = 1;
- aggressive = 1; /* Fool the non-aggressive skip logiv below */
- }
- }
- }
-
- if (!pendingPrioritisedExist) /* None found, so we can clear this */
- dev->hasPendingPrioritisedGCs = 0;
- }
-
- /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
- * search harder.
- * 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();
- }
-
- bi = yaffs_GetBlockInfo(dev, b);
-
- if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
- (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
- dirtiest = b;
- pagesInUse = (bi->pagesInUse - bi->softDeletions);
- }
- }
-
- 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;
-}
-
-static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
-{
- 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" : ""));
-
- bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
-
- 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 (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));
- }
- }
- }
-
- 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 */
-
- yaffs_RetireBlock(dev, blockNo);
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("**>> Block %d retired" TENDSTR), blockNo));
- }
-}
-
-static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
-{
- int i;
-
- yaffs_BlockInfo *bi;
-
- if (dev->nErasedBlocks < 1) {
- /* Hoosterman we've got a problem.
- * Can't get space to gc
- */
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs tragedy: no more erased 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;
- }
-
- 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;
- }
- }
-
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("yaffs tragedy: no more erased blocks, but there should have been %d"
- TENDSTR), dev->nErasedBlocks));
-
- return -1;
-}
-
-
-
-static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
-{
- if (!dev->nCheckpointBlocksRequired &&
- dev->isYaffs2) {
- /* Not a valid value so recalculate */
- int nBytes = 0;
- int nBlocks;
- int devBlocks = (dev->endBlock - dev->startBlock + 1);
- int tnodeSize;
-
- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
-
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
-
- nBytes += sizeof(yaffs_CheckpointValidity);
- nBytes += sizeof(yaffs_CheckpointDevice);
- nBytes += devBlocks * sizeof(yaffs_BlockInfo);
- nBytes += devBlocks * dev->chunkBitmapStride;
- nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
- nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
- nBytes += sizeof(yaffs_CheckpointValidity);
- nBytes += sizeof(__u32); /* checksum*/
-
- /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
-
- nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
-
- dev->nCheckpointBlocksRequired = nBlocks;
- }
-
- return dev->nCheckpointBlocksRequired;
-}
-
-/*
- * Check if there's space to allocate...
- * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
- */
-static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
-{
- int reservedChunks;
- int reservedBlocks = dev->nReservedBlocks;
- int checkpointBlocks;
-
- if (dev->isYaffs2) {
- checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
- dev->blocksInCheckpoint;
- if (checkpointBlocks < 0)
- checkpointBlocks = 0;
- } else {
- checkpointBlocks = 0;
- }
-
- reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
-
- return (dev->nFreeChunks > reservedChunks);
-}
-
-static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
- yaffs_BlockInfo **blockUsedPtr)
-{
- int retVal;
- yaffs_BlockInfo *bi;
-
- if (dev->allocationBlock < 0) {
- /* Get next block to allocate off */
- dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
- dev->allocationPage = 0;
- }
-
- 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);
-
- dev->allocationPage++;
-
- 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)
-{
- int n;
-
- n = dev->nErasedBlocks * dev->nChunksPerBlock;
-
- if (dev->allocationBlock > 0)
- n += (dev->nChunksPerBlock - dev->allocationPage);
-
- return n;
-
-}
-
-static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
- int wholeBlock)
-{
- int oldChunk;
- int newChunk;
- int markNAND;
- int retVal = YAFFS_OK;
- int cleanups = 0;
- int i;
- int isCheckpointBlock;
- int matchingChunk;
- int maxCopies;
-
- int chunksBefore = yaffs_GetErasedChunks(dev);
- int chunksAfter;
-
- yaffs_ExtendedTags tags;
-
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
-
- yaffs_Object *object;
-
- isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
-
-
- T(YAFFS_TRACE_TRACING,
- (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
- block,
- bi->pagesInUse,
- bi->hasShrinkHeader,
- wholeBlock));
-
- /*yaffs_VerifyFreeChunks(dev); */
-
- if(bi->blockState == YAFFS_BLOCK_STATE_FULL)
- bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
-
- 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.
- */
- if(dev->gcChunk == 0) /* first time through for this block */
- dev->nFreeChunks -= bi->softDeletions;
-
- dev->isDoingGC = 1;
-
- 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 {
-
- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
-
- yaffs_VerifyBlock(dev, bi, block);
-
- maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
- oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
-
- for (/* init already done */;
- retVal == YAFFS_OK &&
- dev->gcChunk < dev->nChunksPerBlock &&
- (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
- maxCopies > 0;
- dev->gcChunk++, oldChunk++) {
- if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
-
- /* This page is in use and might need to be copied off */
-
- maxCopies--;
-
- markNAND = 1;
-
- yaffs_InitialiseTags(&tags);
-
- yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
- buffer, &tags);
-
- object =
- yaffs_FindObjectByNumber(dev,
- tags.objectId);
-
- T(YAFFS_TRACE_GC_DETAIL,
- (TSTR
- ("Collecting chunk in block %d, %d %d %d " TENDSTR),
- dev->gcChunk, tags.objectId, tags.chunkId,
- tags.byteCount));
-
- if (object && !yaffs_SkipVerification(dev)) {
- if (tags.chunkId == 0)
- matchingChunk = object->hdrChunk;
- 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));
-
- }
-
- 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));
- }
-
- if (object &&
- object->deleted &&
- object->softDeleted &&
- tags.chunkId != 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.
- */
-
- object->nDataChunks--;
-
- 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->hdrChunk = 0;
- yaffs_FreeTnode(object->myDev,
- object->variant.
- fileVariant.top);
- object->variant.fileVariant.top = NULL;
- yaffs_DoGenericObjectDeletion(object);
-
- } 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++;
-
- dev->nGCCopies++;
-
- 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.
- */
-
- yaffs_ObjectHeader *oh;
- oh = (yaffs_ObjectHeader *)buffer;
- oh->isShrink = 0;
- tags.extraIsShrinkHeader = 0;
-
- yaffs_VerifyObjectHeader(object, oh, &tags, 1);
- }
-
- newChunk =
- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
-
- if (newChunk < 0) {
- retVal = YAFFS_FAIL;
- } else {
-
- /* Ok, now fix up the Tnodes etc. */
-
- if (tags.chunkId == 0) {
- /* It's a header */
- object->hdrChunk = newChunk;
- object->serial = tags.serialNumber;
- } else {
- /* It's a data chunk */
- yaffs_PutChunkIntoFile
- (object,
- tags.chunkId,
- newChunk, 0);
- }
- }
- }
-
- if (retVal == YAFFS_OK)
- yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
-
- }
- }
-
- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
-
-
- /* 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--;
- }
-
- }
-
- }
-
- yaffs_VerifyCollectedBlock(dev, bi, block);
-
- chunksAfter = yaffs_GetErasedChunks(dev);
- if (chunksBefore >= chunksAfter) {
- T(YAFFS_TRACE_GC,
- (TSTR
- ("gc did not increase free chunks before %d after %d"
- TENDSTR), chunksBefore, chunksAfter));
- }
-
- /* If the gc completed then clear the current gcBlock so that we find another. */
- if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
- dev->gcBlock = -1;
- dev->gcChunk = 0;
- }
-
- dev->isDoingGC = 0;
-
- return retVal;
-}
-
-/* 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)
-{
- 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 = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
- if (checkpointBlockAdjust < 0)
- checkpointBlockAdjust = 0;
-
- if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
- /* We need a block soon...*/
- aggressive = 1;
- } else {
- /* We're in no hurry */
- aggressive = 0;
- }
-
- if (dev->gcBlock <= 0) {
- dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
- dev->gcChunk = 0;
- }
-
- block = dev->gcBlock;
-
- if (block > 0) {
- dev->garbageCollections++;
- if (!aggressive)
- dev->passiveGarbageCollections++;
-
- T(YAFFS_TRACE_GC,
- (TSTR
- ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
- dev->nErasedBlocks, aggressive));
-
- gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
- }
-
- 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 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;
-
-}
-
-
-/*-------------------- Data file manipulation -----------------*/
-
-static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
- yaffs_ExtendedTags *tags)
+/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
+struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev,
+ struct yaffs_file_var *file_struct,
+ u32 chunk_id)
{
- /*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;
- }
-
- tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
+ struct yaffs_tnode *tn = file_struct->top;
+ u32 i;
+ int required_depth;
+ int level = file_struct->top_level;
- if (tn) {
- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+ dev = dev;
- retVal =
- yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
- chunkInInode);
- }
- return retVal;
-}
+ /* Check sane level and chunk Id */
+ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
+ return NULL;
-static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
- yaffs_ExtendedTags *tags)
-{
- /* Get the Tnode, then get the level 0 offset chunk offset */
- yaffs_Tnode *tn;
- int theChunk = -1;
- yaffs_ExtendedTags localTags;
+ if (chunk_id > YAFFS_MAX_CHUNK_ID)
+ return NULL;
- yaffs_Device *dev = in->myDev;
- int retVal = -1;
+ /* First check we're tall enough (ie enough top_level) */
- if (!tags) {
- /* Passed a NULL, so use our own tags space */
- tags = &localTags;
+ i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS;
+ required_depth = 0;
+ while (i) {
+ i >>= YAFFS_TNODES_INTERNAL_BITS;
+ required_depth++;
}
- tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
-
- if (tn) {
-
- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+ if (required_depth > file_struct->top_level)
+ return NULL; /* Not tall enough, so we can't find it */
- retVal =
- yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
- chunkInInode);
-
- /* Delete the entry in the filestructure (if found) */
- if (retVal != -1)
- yaffs_PutLevel0Tnode(dev, tn, chunkInInode, 0);
+ /* Traverse down to level 0 */
+ while (level > 0 && tn) {
+ tn = tn->internal[(chunk_id >>
+ (YAFFS_TNODES_LEVEL0_BITS +
+ (level - 1) *
+ YAFFS_TNODES_INTERNAL_BITS)) &
+ YAFFS_TNODES_INTERNAL_MASK];
+ level--;
}
- return retVal;
+ return tn;
}
-#ifdef YAFFS_PARANOID
+/* AddOrFindLevel0Tnode 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.
+ */
-static int yaffs_CheckFileSanity(yaffs_Object *in)
+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 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)
- return YAFFS_FAIL;
-
- objId = in->objectId;
- fSize = in->variant.fileVariant.fileSize;
- nChunks =
- (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
-
- for (chunk = 1; chunk <= nChunks; chunk++) {
- tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
- chunk);
-
- if (tn) {
-
- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
+ int required_depth;
+ int i;
+ int l;
+ struct yaffs_tnode *tn;
- if (yaffs_CheckChunkBits
- (dev, theChunk / dev->nChunksPerBlock,
- theChunk % dev->nChunksPerBlock)) {
+ u32 x;
- yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
- tags,
- &chunkDeleted);
- if (yaffs_TagsMatch
- (tags, in->objectId, chunk, chunkDeleted)) {
- /* found it; */
+ /* Check sane level and page Id */
+ if (file_struct->top_level < 0
+ || file_struct->top_level > YAFFS_TNODES_MAX_LEVEL)
+ return NULL;
- }
- } else {
+ if (chunk_id > YAFFS_MAX_CHUNK_ID)
+ return NULL;
- failed = 1;
- }
+ /* First check we're tall enough (ie enough top_level) */
- } else {
- /* T(("No level 0 found for %d\n", chunk)); */
- }
+ x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS;
+ required_depth = 0;
+ while (x) {
+ x >>= YAFFS_TNODES_INTERNAL_BITS;
+ required_depth++;
}
- return failed ? YAFFS_FAIL : YAFFS_OK;
-}
-
-#endif
-
-static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
- int chunkInNAND, int inScan)
-{
- /* NB inScan is zero unless scanning.
- * For forward scanning, inScan is > 0;
- * for backward scanning inScan is < 0
- */
+ 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++) {
- yaffs_Tnode *tn;
- yaffs_Device *dev = in->myDev;
- int existingChunk;
- yaffs_ExtendedTags existingTags;
- yaffs_ExtendedTags newTags;
- unsigned existingSerial, newSerial;
+ tn = yaffs_get_tnode(dev);
- 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();
+ if (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)));
+ return NULL;
+ }
}
-
- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
- return YAFFS_OK;
}
- tn = yaffs_AddOrFindLevel0Tnode(dev,
- &in->variant.fileVariant,
- chunkInInode,
- NULL);
- if (!tn)
- return YAFFS_FAIL;
-
- existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
-
- 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.
- */
-
- 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.
- */
-
- if (inScan > 0) {
- /* Only do this for forward scanning */
- yaffs_ReadChunkWithTagsFromNAND(dev,
- chunkInNAND,
- NULL, &newTags);
-
- /* Do a proper find */
- existingChunk =
- yaffs_FindChunkInFile(in, chunkInInode,
- &existingTags);
- }
-
- if (existingChunk <= 0) {
- /*Hoosterman - how did this happen? */
+ /* Traverse down to level 0, adding anything we need */
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy: existing chunk < 0 in scan"
- TENDSTR)));
+ l = file_struct->top_level;
+ tn = file_struct->top;
- }
+ if (l > 0) {
+ while (l > 0 && tn) {
+ x = (chunk_id >>
+ (YAFFS_TNODES_LEVEL0_BITS +
+ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
+ YAFFS_TNODES_INTERNAL_MASK;
- /* NB The deleted flags should be false, otherwise the chunks will
- * not be loaded during a scan
- */
+ if ((l > 1) && !tn->internal[x]) {
+ /* Add missing non-level-zero tnode */
+ 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 (passed_tn) {
+ /* If we already have one, then release it. */
+ if (tn->internal[x])
+ yaffs_free_tnode(dev,
+ tn->
+ internal[x]);
+ tn->internal[x] = passed_tn;
- if (inScan > 0) {
- newSerial = newTags.serialNumber;
- existingSerial = existingTags.serialNumber;
+ } else if (!tn->internal[x]) {
+ /* Don't have one, none passed in */
+ tn->internal[x] = yaffs_get_tnode(dev);
+ if (!tn->internal[x])
+ return NULL;
+ }
}
- 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__);
- } 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;
- }
+ tn = tn->internal[x];
+ l--;
+ }
+ } else {
+ /* top is level 0 */
+ if (passed_tn) {
+ memcpy(tn, passed_tn,
+ (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8);
+ yaffs_free_tnode(dev, passed_tn);
}
-
}
- if (existingChunk == 0)
- in->nDataChunks++;
-
- yaffs_PutLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
-
- return YAFFS_OK;
+ return tn;
}
-static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
- __u8 *buffer)
+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 chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
+ int j;
- 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;
- }
+ 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;
+ }
+ }
+ }
+ the_chunk++;
+ }
+ return -1;
}
-void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
+static void yaffs_soft_del_chunk(struct yaffs_dev *dev, int chunk)
{
- int block;
- int page;
- yaffs_ExtendedTags tags;
- yaffs_BlockInfo *bi;
-
- if (chunkId <= 0)
- return;
-
- dev->nDeletions++;
- block = chunkId / dev->nChunksPerBlock;
- page = chunkId % dev->nChunksPerBlock;
-
-
- if (!yaffs_CheckChunkBit(dev, block, page))
- T(YAFFS_TRACE_VERIFY,
- (TSTR("Deleting invalid chunk %d"TENDSTR),
- chunkId));
-
- bi = yaffs_GetBlockInfo(dev, block);
-
- T(YAFFS_TRACE_DELETION,
- (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
-
- if (markNAND &&
- bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
-
- yaffs_InitialiseTags(&tags);
-
- tags.chunkDeleted = 1;
+ struct yaffs_block_info *the_block;
+ unsigned block_no;
- yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
- yaffs_HandleUpdateChunk(dev, chunkId, &tags);
- } 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++;
-
- yaffs_ClearChunkBit(dev, block, page);
-
- bi->pagesInUse--;
-
- if (bi->pagesInUse == 0 &&
- !bi->hasShrinkHeader &&
- bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
- bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- yaffs_BlockBecameDirty(dev, block);
- }
+ T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
+ 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);
}
-
}
-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;
+/* 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.
+ */
- int newChunkId;
- yaffs_ExtendedTags newTags;
+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;
- yaffs_Device *dev = in->myDev;
+ if (tn) {
+ if (level > 0) {
- yaffs_CheckGarbageCollection(dev);
+ 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 {
+ /* Hoosterman... how could this happen? */
+ }
+ }
+ }
+ return (all_done) ? 1 : 0;
+ } else if (level == 0) {
- /* Get the previous chunk at this location in the file if it exists */
- prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
+ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
+ the_chunk = yaffs_get_group_base(dev, tn, i);
+ if (the_chunk) {
+ /* 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_soft_del_chunk(dev, the_chunk);
+ yaffs_load_tnode_0(dev, tn, i, 0);
+ }
- /* Set up new tags */
- yaffs_InitialiseTags(&newTags);
+ }
+ return 1;
- newTags.chunkId = chunkInInode;
- newTags.objectId = in->objectId;
- newTags.serialNumber =
- (prevChunkId > 0) ? prevTags.serialNumber + 1 : 1;
- newTags.byteCount = nBytes;
+ }
- if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
- YBUG();
}
- 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__);
-
- yaffs_CheckFileSanity(in);
- }
- return newChunkId;
+ return 1;
}
-/* UpdateObjectHeader updates the header on NAND for an object.
- * If name is not NULL, then that new name is used.
- */
-int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
- int isShrink, int shadows)
+static void yaffs_soft_del_file(struct yaffs_obj *obj)
{
+ if (obj->deleted &&
+ obj->variant_type == YAFFS_OBJECT_TYPE_FILE && !obj->soft_del) {
+ 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;
+ T(YAFFS_TRACE_TRACING,
+ (TSTR("yaffs: Deleting empty file %d" TENDSTR),
+ obj->obj_id));
+ yaffs_generic_obj_del(obj);
+ } else {
+ yaffs_soft_del_worker(obj,
+ obj->variant.file_variant.top,
+ obj->variant.
+ file_variant.top_level, 0);
+ obj->soft_del = 1;
+ }
+ }
+}
- yaffs_BlockInfo *bi;
-
- yaffs_Device *dev = in->myDev;
-
- int prevChunkId;
- int retVal = 0;
- int result = 0;
-
- int newChunkId;
- yaffs_ExtendedTags newTags;
- yaffs_ExtendedTags oldTags;
+/* 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.
+ */
- __u8 *buffer = NULL;
- YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
+static struct yaffs_tnode *yaffs_prune_worker(struct yaffs_dev *dev,
+ struct yaffs_tnode *tn, u32 level,
+ int del0)
+{
+ int i;
+ int has_data;
- yaffs_ObjectHeader *oh = NULL;
+ if (tn) {
+ has_data = 0;
- yaffs_strcpy(oldName, _Y("silly old name"));
+ 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 (tn->internal[i])
+ has_data++;
+ }
+ } else {
+ int tnode_size_u32 = dev->tnode_size / sizeof(u32);
+ u32 *map = (u32 *) tn;
- if (!in->fake ||
- in == dev->rootDir || /* The rootDir should also be saved */
- force) {
+ for (i = 0; !has_data && i < tnode_size_u32; i++) {
+ if (map[i])
+ has_data++;
+ }
+ }
- yaffs_CheckGarbageCollection(dev);
- yaffs_CheckObjectDetailsLoaded(in);
+ if (has_data == 0 && del0) {
+ /* Free and return NULL */
- buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
- oh = (yaffs_ObjectHeader *) buffer;
+ yaffs_free_tnode(dev, tn);
+ tn = NULL;
+ }
- prevChunkId = in->hdrChunk;
+ }
- if (prevChunkId > 0) {
- result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
- buffer, &oldTags);
+ return tn;
- yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
+}
- memcpy(oldName, oh->name, sizeof(oh->name));
- }
+static int yaffs_prune_tree(struct yaffs_dev *dev,
+ struct yaffs_file_var *file_struct)
+{
+ int i;
+ int has_data;
+ int done = 0;
+ struct yaffs_tnode *tn;
- memset(buffer, 0xFF, dev->nDataBytesPerChunk);
+ if (file_struct->top_level > 0) {
+ file_struct->top =
+ yaffs_prune_worker(dev, file_struct->top,
+ file_struct->top_level, 0);
- oh->type = in->variantType;
- oh->yst_mode = in->yst_mode;
- oh->shadowsObject = oh->inbandShadowsObject = shadows;
-
-#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;
+ /* 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 (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));
+ while (file_struct->top_level && !done) {
+ tn = file_struct->top;
- oh->isShrink = isShrink;
+ has_data = 0;
+ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
+ if (tn->internal[i])
+ has_data++;
+ }
- 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 (!has_data) {
+ file_struct->top = tn->internal[0];
+ file_struct->top_level--;
+ yaffs_free_tnode(dev, tn);
+ } else {
+ done = 1;
+ }
}
+ }
- /* Tags */
- yaffs_InitialiseTags(&newTags);
- in->serial++;
- newTags.chunkId = 0;
- newTags.objectId = in->objectId;
- newTags.serialNumber = in->serial;
-
- /* Add extra info for file header */
-
- 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;
-
- yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
+ return YAFFS_OK;
+}
- /* Create new chunk in NAND */
- newChunkId =
- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
- (prevChunkId > 0) ? 1 : 0);
+/*-------------------- End of File Structure functions.-------------------*/
- if (newChunkId >= 0) {
+/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
+static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev)
+{
+ struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev);
- in->hdrChunk = newChunkId;
+ if (obj) {
+ dev->n_obj++;
- if (prevChunkId > 0) {
- yaffs_DeleteChunk(dev, prevChunkId, 1,
- __LINE__);
- }
+ /* Now sweeten it up... */
- if (!yaffs_ObjectHasCachedWriteData(in))
- in->dirty = 0;
+ memset(obj, 0, sizeof(struct yaffs_obj));
+ obj->being_created = 1;
- /* 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;
- }
+ 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);
+ /* 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);
}
- retVal = newChunkId;
+ /* 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);
+ obj->being_created = 0;
}
- if (buffer)
- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+ dev->checkpoint_blocks_required = 0; /* force recalculation */
- return retVal;
+ return obj;
}
-/*------------------------ 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.
- *
- * There are a limited number (~10) of cache chunks per device so that we don't
- * need a very intelligent search.
- */
-
-static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
+static struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev,
+ int number, u32 mode)
{
- yaffs_Device *dev = obj->myDev;
- int i;
- yaffs_ChunkCache *cache;
- int nCaches = obj->myDev->nShortOpCaches;
- for (i = 0; i < nCaches; i++) {
- cache = &dev->srCache[i];
- if (cache->object == obj &&
- cache->dirty)
- return 1;
+ struct yaffs_obj *obj =
+ yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
+ if (obj) {
+ obj->fake = 1; /* it is fake so it might have no NAND presence... */
+ obj->rename_allowed = 0; /* ... and we're not allowed to rename it... */
+ obj->unlink_allowed = 0; /* ... or unlink it */
+ obj->deleted = 0;
+ obj->unlinked = 0;
+ obj->yst_mode = mode;
+ obj->my_dev = dev;
+ obj->hdr_chunk = 0; /* Not a valid chunk. */
}
- return 0;
-}
+ return obj;
+}
-static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
+static void yaffs_unhash_obj(struct yaffs_obj *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;
-
- if (nCaches > 0) {
- do {
- cache = NULL;
-
- /* 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;
- }
- }
- }
+ int bucket;
+ struct yaffs_dev *dev = obj->my_dev;
- if (cache && !cache->locked) {
- /* Write it out and free it up */
+ /* 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--;
+ }
+}
- chunkWritten =
- yaffs_WriteChunkDataToObject(cache->object,
- cache->chunkId,
- cache->data,
- cache->nBytes,
- 1);
- cache->dirty = 0;
- cache->object = NULL;
- }
+/* 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 = obj->my_dev;
- } while (cache && chunkWritten > 0);
+ T(YAFFS_TRACE_OS,
+ (TSTR("FreeObject %p inode %p" TENDSTR), obj, obj->my_inode));
- if (cache) {
- /* Hoosterman, disk full while writing cache out. */
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
+ if (!obj)
+ YBUG();
+ if (obj->parent)
+ YBUG();
+ if (!list_empty(&obj->siblings))
+ YBUG();
- }
+ 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;
}
+ yaffs_unhash_obj(obj);
+
+ yaffs_free_raw_obj(dev, obj);
+ dev->n_obj--;
+ dev->checkpoint_blocks_required = 0; /* force recalculation */
}
-/*yaffs_FlushEntireDeviceCache(dev)
- *
- *
- */
+void yaffs_handle_defered_free(struct yaffs_obj *obj)
+{
+ if (obj->defered_free)
+ yaffs_free_obj(obj);
+}
-void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
+static void yaffs_init_tnodes_and_objs(struct yaffs_dev *dev)
{
- yaffs_Object *obj;
- int nCaches = dev->nShortOpCaches;
int i;
- /* Find a dirty object in the cache and flush it...
- * until there are no further dirty objects.
- */
- do {
- obj = NULL;
- for (i = 0; i < nCaches && !obj; i++) {
- if (dev->srCache[i].object &&
- dev->srCache[i].dirty)
- obj = dev->srCache[i].object;
-
- }
- if (obj)
- yaffs_FlushFilesChunkCache(obj);
+ dev->n_obj = 0;
+ dev->n_tnodes = 0;
- } while (obj);
+ yaffs_init_raw_tnodes_and_objs(dev);
+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+ INIT_LIST_HEAD(&dev->obj_bucket[i].list);
+ dev->obj_bucket[i].count = 0;
+ }
}
-
-/* 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 yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
+static int yaffs_find_nice_bucket(struct yaffs_dev *dev)
{
int i;
+ int l = 999;
+ int lowest = 999999;
+
+ /* Search for the shortest list or one that
+ * isn't too long.
+ */
- if (dev->nShortOpCaches > 0) {
- for (i = 0; i < dev->nShortOpCaches; i++) {
- if (!dev->srCache[i].object)
- return &dev->srCache[i];
+ 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;
}
+
}
- return NULL;
+ return l;
}
-static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
+static int yaffs_new_obj_id(struct yaffs_dev *dev)
{
- yaffs_ChunkCache *cache;
- yaffs_Object *theObj;
- int usage;
- int i;
- int pushout;
-
- if (dev->nShortOpCaches > 0) {
- /* Try find a non-dirty one... */
+ int bucket = yaffs_find_nice_bucket(dev);
- cache = yaffs_GrabChunkCacheWorker(dev);
+ /* Now find an object value that has not already been taken
+ * by scanning the list.
+ */
- 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.
- */
+ int found = 0;
+ struct list_head *i;
- /* With locking we can't assume we can use entry zero */
+ u32 n = (u32) bucket;
- theObj = NULL;
- usage = -1;
- cache = NULL;
- pushout = -1;
+ /* yaffs_check_obj_hash_sane(); */
- 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];
- pushout = i;
+ 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 (!cache || cache->dirty) {
- /* Flush and try again */
- yaffs_FlushFilesChunkCache(theObj);
- cache = yaffs_GrabChunkCacheWorker(dev);
- }
+ return n;
+}
- }
- return cache;
- } else
- return NULL;
+static void yaffs_hash_obj(struct yaffs_obj *in)
+{
+ int bucket = yaffs_hash_fn(in->obj_id);
+ struct yaffs_dev *dev = in->my_dev;
+ list_add(&in->hash_link, &dev->obj_bucket[bucket].list);
+ dev->obj_bucket[bucket].count++;
}
-/* Find a cached chunk */
-static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
- int chunkId)
+struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number)
{
- 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++;
+ int bucket = yaffs_hash_fn(number);
+ struct list_head *i;
+ struct yaffs_obj *in;
+
+ list_for_each(i, &dev->obj_bucket[bucket].list) {
+ /* Look if it is in the list */
+ if (i) {
+ in = list_entry(i, struct yaffs_obj, hash_link);
+ if (in->obj_id == number) {
+
+ /* Don't tell the VFS about this one if it is defered free */
+ if (in->defered_free)
+ return NULL;
- return &dev->srCache[i];
+ return in;
}
}
}
+
return NULL;
}
-/* Mark the chunk for the least recently used algorithym */
-static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
- int isAWrite)
+struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number,
+ enum yaffs_obj_type type)
{
+ struct yaffs_obj *the_obj = NULL;
+ struct yaffs_tnode *tn = NULL;
+
+ if (number < 0)
+ number = yaffs_new_obj_id(dev);
+
+ if (type == YAFFS_OBJECT_TYPE_FILE) {
+ tn = yaffs_get_tnode(dev);
+ if (!tn)
+ return NULL;
+ }
+
+ the_obj = yaffs_alloc_empty_obj(dev);
+ if (!the_obj) {
+ if (tn)
+ yaffs_free_tnode(dev, tn);
+ return NULL;
+ }
+
+ if (the_obj) {
+ 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);
+
+ 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 = ~0; /* max */
+ 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;
+}
- 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;
+struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev,
+ int number,
+ enum yaffs_obj_type type)
+{
+ struct yaffs_obj *the_obj = NULL;
- dev->srLastUse = 0;
- }
+ if (number > 0)
+ the_obj = yaffs_find_by_number(dev, number);
- dev->srLastUse++;
+ if (!the_obj)
+ the_obj = yaffs_new_obj(dev, number, type);
- cache->lastUse = dev->srLastUse;
+ return the_obj;
- if (isAWrite)
- cache->dirty = 1;
- }
}
-/* Invalidate a single cache page.
- * Do this when a whole page gets written,
- * ie the short cache for this page is no longer valid.
- */
-static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
+YCHAR *yaffs_clone_str(const YCHAR * str)
{
- if (object->myDev->nShortOpCaches > 0) {
- yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
+ YCHAR *new_str = NULL;
+ int len;
- if (cache)
- cache->object = NULL;
+ if (!str)
+ str = _Y("");
+
+ len = yaffs_strnlen(str, YAFFS_MAX_ALIAS_LENGTH);
+ new_str = YMALLOC((len + 1) * sizeof(YCHAR));
+ if (new_str) {
+ yaffs_strncpy(new_str, str, len);
+ new_str[len] = 0;
}
+ return new_str;
+
}
-/* Invalidate all the cache pages associated with this object
- * Do this whenever ther file is deleted or resized.
+/*
+ * 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)
*/
-static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
+
+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)
{
- int i;
- yaffs_Device *dev = in->myDev;
+ struct yaffs_obj *in;
+ YCHAR *str = NULL;
- if (dev->nShortOpCaches > 0) {
- /* Invalidate it. */
- for (i = 0; i < dev->nShortOpCaches; i++) {
- if (dev->srCache[i].object == in)
- dev->srCache[i].object = NULL;
- }
+ struct yaffs_dev *dev = parent->my_dev;
+
+ /* 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;
+
+ if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
+ str = yaffs_clone_str(alias_str);
+ if (!str)
+ return NULL;
}
-}
-/*--------------------- Checkpointing --------------------*/
+ in = yaffs_new_obj(dev, -1, type);
+
+ if (!in) {
+ if (str)
+ YFREE(str);
+ return NULL;
+ }
+ if (in) {
+ in->hdr_chunk = 0;
+ in->valid = 1;
+ in->variant_type = type;
-static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
-{
- yaffs_CheckpointValidity cp;
+ in->yst_mode = mode;
- memset(&cp, 0, sizeof(cp));
+ yaffs_attribs_init(in, gid, uid, rdev);
- cp.structType = sizeof(cp);
- cp.magic = YAFFS_MAGIC;
- cp.version = YAFFS_CHECKPOINT_VERSION;
- cp.head = (head) ? 1 : 0;
+ in->n_data_chunks = 0;
- return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
- 1 : 0;
-}
+ yaffs_set_obj_name(in, name);
+ in->dirty = 1;
-static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
-{
- yaffs_CheckpointValidity cp;
- int ok;
+ yaffs_add_obj_to_dir(parent, in);
- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+ in->my_dev = parent->my_dev;
- 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;
-}
+ 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;
+ }
-static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
- yaffs_Device *dev)
-{
- cp->nErasedBlocks = dev->nErasedBlocks;
- cp->allocationBlock = dev->allocationBlock;
- cp->allocationPage = dev->allocationPage;
- cp->nFreeChunks = dev->nFreeChunks;
+ if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) {
+ /* Could not create the object header, fail the creation */
+ yaffs_del_obj(in);
+ in = NULL;
+ }
- cp->nDeletedFiles = dev->nDeletedFiles;
- cp->nUnlinkedFiles = dev->nUnlinkedFiles;
- cp->nBackgroundDeletions = dev->nBackgroundDeletions;
- cp->sequenceNumber = dev->sequenceNumber;
- cp->oldestDirtySequence = dev->oldestDirtySequence;
+ yaffs_update_parent(parent);
+ }
+ return in;
}
-static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev,
- yaffs_CheckpointDevice *cp)
+struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent,
+ const YCHAR * name, u32 mode, u32 uid,
+ u32 gid)
{
- 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;
+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
+ uid, gid, NULL, NULL, 0);
}
-
-static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
+struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR * name,
+ u32 mode, u32 uid, u32 gid)
{
- yaffs_CheckpointDevice cp;
- __u32 nBytes;
- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
-
- int ok;
+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
+ mode, uid, gid, NULL, NULL, 0);
+}
- /* Write device runtime values*/
- yaffs_DeviceToCheckpointDevice(&cp, dev);
- cp.structType = sizeof(cp);
+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);
+}
- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+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);
+}
- /* Write block info */
- if (ok) {
- nBytes = nBlocks * sizeof(yaffs_BlockInfo);
- ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
- }
+/* 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 as an equivalent object */
+ equiv_obj = yaffs_get_equivalent_obj(equiv_obj);
- /* Write chunk bits */
- if (ok) {
- nBytes = nBlocks * dev->chunkBitmapStride;
- ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
+ if (yaffs_create_obj
+ (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
+ equiv_obj, NULL, 0)) {
+ return equiv_obj;
+ } else {
+ return NULL;
}
- return ok ? 1 : 0;
}
-static int yaffs_ReadCheckpointDevice(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)
{
- yaffs_CheckpointDevice cp;
- __u32 nBytes;
- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
+ int unlink_op;
+ int del_op;
- int ok;
+ struct yaffs_obj *existing_target;
- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
- if (!ok)
- return 0;
+ if (new_dir == NULL)
+ new_dir = obj->parent; /* use the old directory */
- if (cp.structType != sizeof(cp))
- return 0;
+ if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+ ("tragedy: yaffs_change_obj_name: new_dir is not a directory"
+ TENDSTR)));
+ YBUG();
+ }
+
+ /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
+ if (obj->my_dev->param.is_yaffs2)
+ unlink_op = (new_dir == obj->my_dev->unlinked_dir);
+ else
+ unlink_op = (new_dir == obj->my_dev->unlinked_dir
+ && obj->variant_type == YAFFS_OBJECT_TYPE_FILE);
+ del_op = (new_dir == obj->my_dev->del_dir);
- yaffs_CheckpointDeviceToDevice(dev, &cp);
+ existing_target = yaffs_find_by_name(new_dir, new_name);
- nBytes = nBlocks * sizeof(yaffs_BlockInfo);
+ /* 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 ((unlink_op ||
+ del_op ||
+ force ||
+ (shadows > 0) ||
+ !existing_target) &&
+ new_dir->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
+ yaffs_set_obj_name(obj, new_name);
+ obj->dirty = 1;
- ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
+ yaffs_add_obj_to_dir(new_dir, obj);
- if (!ok)
- return 0;
- nBytes = nBlocks * dev->chunkBitmapStride;
+ if (unlink_op)
+ obj->unlinked = 1;
- ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
+ /* If it is a deletion then we mark it as a shrink for gc purposes. */
+ if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >=
+ 0)
+ return YAFFS_OK;
+ }
- return ok ? 1 : 0;
+ return YAFFS_FAIL;
}
-static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
- yaffs_Object *obj)
+
+/* 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)
{
+ struct yaffs_obj *obj = NULL;
+ struct yaffs_obj *existing_target = NULL;
+ int force = 0;
+ int result;
+ struct yaffs_dev *dev;
- cp->objectId = obj->objectId;
- cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
- cp->hdrChunk = obj->hdrChunk;
- cp->variantType = obj->variantType;
- cp->deleted = obj->deleted;
- cp->softDeleted = obj->softDeleted;
- cp->unlinked = obj->unlinked;
- cp->fake = obj->fake;
- cp->renameAllowed = obj->renameAllowed;
- cp->unlinkAllowed = obj->unlinkAllowed;
- cp->serial = obj->serial;
- cp->nDataChunks = obj->nDataChunks;
+ if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
+ if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
- 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;
-}
+ dev = old_dir->my_dev;
-static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
-{
+#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
- yaffs_Object *parent;
+ if (yaffs_strnlen(new_name, YAFFS_MAX_NAME_LENGTH + 1) >
+ YAFFS_MAX_NAME_LENGTH)
+ /* ENAMETOOLONG */
+ return YAFFS_FAIL;
- if (obj->variantType != cp->variantType) {
- T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
- TCONT("chunk %d does not match existing object type %d")
- TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
- obj->variantType));
- return 0;
+ if(old_name)
+ obj = yaffs_find_by_name(old_dir, old_name);
+ else{
+ obj = old_dir;
+ old_dir = obj->parent;
}
- obj->objectId = cp->objectId;
- if (cp->parentId)
- parent = yaffs_FindOrCreateObjectByNumber(
- obj->myDev,
- cp->parentId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
- else
- parent = NULL;
-
- if (parent) {
- if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
- TCONT(" chunk %d Parent type, %d, not directory")
- TENDSTR),
- cp->objectId, cp->parentId, cp->variantType,
- cp->hdrChunk, parent->variantType));
- return 0;
+ if (obj && obj->rename_allowed) {
+
+ /* Now do the handling for 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 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;
}
- yaffs_AddObjectToDirectory(parent, obj);
- }
-
- obj->hdrChunk = cp->hdrChunk;
- obj->variantType = cp->variantType;
- obj->deleted = cp->deleted;
- obj->softDeleted = cp->softDeleted;
- obj->unlinked = cp->unlinked;
- obj->fake = cp->fake;
- obj->renameAllowed = cp->renameAllowed;
- obj->unlinkAllowed = cp->unlinkAllowed;
- obj->serial = cp->serial;
- obj->nDataChunks = cp->nDataChunks;
-
- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
- obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
- else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
- obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
-
- if (obj->hdrChunk > 0)
- obj->lazyLoaded = 1;
- return 1;
-}
+ 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;
+}
+/*------------------------- Block Management and Page Allocation ----------------*/
-static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
- __u32 level, int chunkOffset)
+static int yaffs_init_blocks(struct yaffs_dev *dev)
{
- int i;
- yaffs_Device *dev = in->myDev;
- int ok = 1;
- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+ int n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
+ dev->block_info = NULL;
+ dev->chunk_bits = NULL;
+ dev->alloc_block = -1; /* force it to get a new one */
- if (tn) {
- if (level > 0) {
+ /* If the first allocation strategy fails, thry the alternate one */
+ dev->block_info = YMALLOC(n_blocks * sizeof(struct yaffs_block_info));
+ if (!dev->block_info) {
+ dev->block_info =
+ YMALLOC_ALT(n_blocks * sizeof(struct yaffs_block_info));
+ dev->block_info_alt = 1;
+ } else {
+ dev->block_info_alt = 0;
+ }
- for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
- if (tn->internal[i]) {
- ok = yaffs_CheckpointTnodeWorker(in,
- tn->internal[i],
- level - 1,
- (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
- }
- }
- } else if (level == 0) {
- __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
- ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
- if (ok)
- ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
- }
+ if (dev->block_info) {
+ /* Set up dynamic blockinfo stuff. */
+ dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8; /* round up bytes */
+ dev->chunk_bits = YMALLOC(dev->chunk_bit_stride * n_blocks);
+ if (!dev->chunk_bits) {
+ dev->chunk_bits =
+ YMALLOC_ALT(dev->chunk_bit_stride * n_blocks);
+ dev->chunk_bits_alt = 1;
+ } else {
+ dev->chunk_bits_alt = 0;
+ }
}
- return ok;
+ if (dev->block_info && dev->chunk_bits) {
+ 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;
+ }
+ return YAFFS_FAIL;
}
-static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
+static void yaffs_deinit_blocks(struct yaffs_dev *dev)
{
- __u32 endMarker = ~0;
- int ok = 1;
+ if (dev->block_info_alt && dev->block_info)
+ YFREE_ALT(dev->block_info);
+ else if (dev->block_info)
+ YFREE(dev->block_info);
- 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));
- }
+ dev->block_info_alt = 0;
+
+ dev->block_info = NULL;
- return ok ? 1 : 0;
+ if (dev->chunk_bits_alt && dev->chunk_bits)
+ YFREE_ALT(dev->chunk_bits);
+ else if (dev->chunk_bits)
+ YFREE(dev->chunk_bits);
+ dev->chunk_bits_alt = 0;
+ dev->chunk_bits = NULL;
}
-static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
+void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no)
{
- __u32 baseChunk;
- int ok = 1;
- yaffs_Device *dev = obj->myDev;
- yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
- yaffs_Tnode *tn;
- int nread = 0;
- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, block_no);
- if (tnodeSize < sizeof(yaffs_Tnode))
- tnodeSize = sizeof(yaffs_Tnode);
+ int erased_ok = 0;
- ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
+ /* If the block is still healthy erase it and mark as clean.
+ * If the block has had a data failure, then retire it.
+ */
- while (ok && (~baseChunk)) {
- nread++;
- /* Read level 0 tnode */
+ T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
+ (TSTR("yaffs_block_became_dirty block %d state %d %s" TENDSTR),
+ block_no, bi->block_state,
+ (bi->needs_retiring) ? "needs retiring" : ""));
+ yaffs2_clear_oldest_dirty_seq(dev, bi);
- tn = yaffs_GetTnodeRaw(dev);
- if (tn)
- ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
- else
- ok = 0;
+ bi->block_state = YAFFS_BLOCK_STATE_DIRTY;
- if (tn && ok)
- ok = yaffs_AddOrFindLevel0Tnode(dev,
- fileStructPtr,
- baseChunk,
- tn) ? 1 : 0;
+ /* If this is the block being garbage collected then stop gc'ing this block */
+ if (block_no == dev->gc_block)
+ dev->gc_block = 0;
- if (ok)
- ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
+ /* 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;
+ }
+
+ if (!bi->needs_retiring) {
+ yaffs2_checkpt_invalidate(dev);
+ erased_ok = yaffs_erase_block(dev, block_no);
+ if (!erased_ok) {
+ dev->n_erase_failures++;
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("**>> Erasure failed %d" TENDSTR), block_no));
+ }
+ }
+ if (erased_ok &&
+ ((yaffs_trace_mask & YAFFS_TRACE_ERASE)
+ || !yaffs_skip_verification(dev))) {
+ int i;
+ for (i = 0; i < dev->param.chunks_per_block; i++) {
+ if (!yaffs_check_chunk_erased
+ (dev, block_no * dev->param.chunks_per_block + i)) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ (">>Block %d erasure supposedly OK, but chunk %d not erased"
+ TENDSTR), block_no, i));
+ }
+ }
}
- T(YAFFS_TRACE_CHECKPOINT, (
- TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
- nread, baseChunk, ok));
+ if (erased_ok) {
+ /* 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; /* This is clean, so no need to check */
+ bi->gc_prioritise = 0;
+ yaffs_clear_chunk_bits(dev, block_no);
- return ok ? 1 : 0;
-}
+ T(YAFFS_TRACE_ERASE,
+ (TSTR("Erased block %d" TENDSTR), block_no));
+ } else {
+ dev->n_free_chunks -= dev->param.chunks_per_block; /* We lost a block of free space */
+ yaffs_retire_block(dev, block_no);
+ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ (TSTR("**>> Block %d retired" TENDSTR), block_no));
+ }
+}
-static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
+static int yaffs_find_alloc_block(struct yaffs_dev *dev)
{
- yaffs_Object *obj;
- yaffs_CheckpointObject cp;
int i;
- int ok = 1;
- struct ylist_head *lh;
+ struct yaffs_block_info *bi;
- /* Iterate through the objects in each hash entry,
- * dumping them to the checkpointing stream.
- */
+ if (dev->n_erased_blocks < 1) {
+ /* Hoosterman we've got a problem.
+ * Can't get space to gc
+ */
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
- for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
- ylist_for_each(lh, &dev->objectBucket[i].list) {
- if (lh) {
- obj = ylist_entry(lh, yaffs_Object, hashLink);
- if (!obj->deferedFree) {
- yaffs_ObjectToCheckpointObject(&cp, obj);
- cp.structType = sizeof(cp);
+ return -1;
+ }
- 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.hdrChunk, (unsigned) obj));
+ /* Find an empty block. */
- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
+ 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;
+ }
- if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
- ok = yaffs_WriteCheckpointTnodes(obj);
- }
- }
+ bi = yaffs_get_block_info(dev, dev->alloc_block_finder);
+
+ 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--;
+ T(YAFFS_TRACE_ALLOCATE,
+ (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
+ dev->alloc_block_finder, dev->seq_number,
+ dev->n_erased_blocks));
+ return dev->alloc_block_finder;
}
}
- /* 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));
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+ ("yaffs tragedy: no more erased blocks, but there should have been %d"
+ TENDSTR), dev->n_erased_blocks));
- return ok ? 1 : 0;
+ return -1;
}
-static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
+/*
+ * Check if there's space to allocate...
+ * Thinks.... do we need top make this ths same as yaffs_get_free_chunks()?
+ */
+int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks)
{
- yaffs_Object *obj;
- yaffs_CheckpointObject cp;
- int ok = 1;
- int done = 0;
- yaffs_Object *hardList = NULL;
-
- while (ok && !done) {
- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
- if (cp.structType != sizeof(cp)) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
- cp.structType, sizeof(cp), ok));
- ok = 0;
- }
+ int reserved_chunks;
+ int reserved_blocks = dev->param.n_reserved_blocks;
+ int checkpt_blocks;
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
- cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
-
- if (ok && cp.objectId == ~0)
- done = 1;
- else if (ok) {
- obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
- if (obj) {
- ok = yaffs_CheckpointObjectToObject(obj, &cp);
- if (!ok)
- break;
- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
- ok = yaffs_ReadCheckpointTnodes(obj);
- } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
- obj->hardLinks.next =
- (struct ylist_head *) hardList;
- hardList = obj;
- }
- } else
- ok = 0;
- }
- }
+ checkpt_blocks = yaffs_calc_checkpt_blocks_required(dev);
- if (ok)
- yaffs_HardlinkFixup(dev, hardList);
+ reserved_chunks =
+ ((reserved_blocks + checkpt_blocks) * dev->param.chunks_per_block);
- return ok ? 1 : 0;
+ return (dev->n_free_chunks > (reserved_chunks + n_chunks));
}
-static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
+static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver,
+ struct yaffs_block_info **block_ptr)
{
- __u32 checkpointSum;
- int ok;
+ int ret_val;
+ struct yaffs_block_info *bi;
- yaffs_GetCheckpointSum(dev, &checkpointSum);
-
- ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
+ if (dev->alloc_block < 0) {
+ /* Get next block to allocate off */
+ dev->alloc_block = yaffs_find_alloc_block(dev);
+ dev->alloc_page = 0;
+ }
- if (!ok)
- return 0;
+ if (!use_reserver && !yaffs_check_alloc_available(dev, 1)) {
+ /* Not enough space to allocate unless we're allowed to use the reserve. */
+ return -1;
+ }
- return 1;
-}
+ if (dev->n_erased_blocks < dev->param.n_reserved_blocks
+ && dev->alloc_page == 0) {
+ T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
+ }
-static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
-{
- __u32 checkpointSum0;
- __u32 checkpointSum1;
- int ok;
+ /* Next page please.... */
+ if (dev->alloc_block >= 0) {
+ bi = yaffs_get_block_info(dev, dev->alloc_block);
- yaffs_GetCheckpointSum(dev, &checkpointSum0);
+ 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);
- ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
+ dev->alloc_page++;
- if (!ok)
- return 0;
+ dev->n_free_chunks--;
- if (checkpointSum0 != checkpointSum1)
- return 0;
+ /* 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;
+ }
- return 1;
-}
+ if (block_ptr)
+ *block_ptr = bi;
+ return ret_val;
+ }
-static int yaffs_WriteCheckpointData(yaffs_Device *dev)
-{
- int ok = 1;
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
- if (dev->skipCheckpointWrite || !dev->isYaffs2) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
- ok = 0;
- }
+ return -1;
+}
- if (ok)
- ok = yaffs_CheckpointOpen(dev, 1);
+static int yaffs_get_erased_chunks(struct yaffs_dev *dev)
+{
+ int n;
- 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);
- }
+ n = dev->n_erased_blocks * dev->param.chunks_per_block;
- if (ok)
- ok = yaffs_WriteCheckpointSum(dev);
+ if (dev->alloc_block > 0)
+ n += (dev->param.chunks_per_block - dev->alloc_page);
- if (!yaffs_CheckpointClose(dev))
- ok = 0;
+ return n;
- if (ok)
- dev->isCheckpointed = 1;
- else
- dev->isCheckpointed = 0;
+}
- return dev->isCheckpointed;
+/*
+ * yaffs_skip_rest_of_block() skips over the rest of the allocation block
+ * if we don't want to write to it.
+ */
+void yaffs_skip_rest_of_block(struct yaffs_dev *dev)
+{
+ if (dev->alloc_block > 0) {
+ struct yaffs_block_info *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;
+ }
+ }
}
-static int yaffs_ReadCheckpointData(yaffs_Device *dev)
+static int yaffs_gc_block(struct yaffs_dev *dev, int block, int whole_block)
{
- int ok = 1;
+ int old_chunk;
+ int new_chunk;
+ int mark_flash;
+ int ret_val = YAFFS_OK;
+ int i;
+ int is_checkpt_block;
+ int matching_chunk;
+ int max_copies;
- if (dev->skipCheckpointRead || !dev->isYaffs2) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
- ok = 0;
- }
+ int chunks_before = yaffs_get_erased_chunks(dev);
+ int chunks_after;
- if (ok)
- ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
+ struct yaffs_ext_tags tags;
- 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);
- }
+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, block);
- if (ok) {
- ok = yaffs_ReadCheckpointSum(dev);
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
- }
+ struct yaffs_obj *object;
+
+ is_checkpt_block = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT);
- if (!yaffs_CheckpointClose(dev))
- ok = 0;
+ T(YAFFS_TRACE_TRACING,
+ (TSTR
+ ("Collecting block %d, in use %d, shrink %d, whole_block %d"
+ TENDSTR), block, bi->pages_in_use, bi->has_shrink_hdr,
+ whole_block));
- if (ok)
- dev->isCheckpointed = 1;
- else
- dev->isCheckpointed = 0;
+ /*yaffs_verify_free_chunks(dev); */
- return ok ? 1 : 0;
+ if (bi->block_state == YAFFS_BLOCK_STATE_FULL)
+ bi->block_state = YAFFS_BLOCK_STATE_COLLECTING;
-}
+ bi->has_shrink_hdr = 0; /* clear the flag so that the block can erase */
-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);
- }
-}
+ dev->gc_disable = 1;
+ if (is_checkpt_block || !yaffs_still_some_chunks(dev, block)) {
+ T(YAFFS_TRACE_TRACING,
+ (TSTR
+ ("Collecting block %d that has no chunks in use" TENDSTR),
+ block));
+ yaffs_block_became_dirty(dev, block);
+ } else {
-int yaffs_CheckpointSave(yaffs_Device *dev)
-{
+ u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__);
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+ yaffs_verify_blk(dev, bi, block);
- yaffs_VerifyObjects(dev);
- yaffs_VerifyBlocks(dev);
- yaffs_VerifyFreeChunks(dev);
+ max_copies = (whole_block) ? dev->param.chunks_per_block : 5;
+ old_chunk = block * dev->param.chunks_per_block + dev->gc_chunk;
- if (!dev->isCheckpointed) {
- yaffs_InvalidateCheckpoint(dev);
- yaffs_WriteCheckpointData(dev);
- }
+ 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)) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+ /* This page is in use and might need to be copied off */
- return dev->isCheckpointed;
-}
+ max_copies--;
-int yaffs_CheckpointRestore(yaffs_Device *dev)
-{
- int retval;
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+ mark_flash = 1;
- retval = yaffs_ReadCheckpointData(dev);
+ yaffs_init_tags(&tags);
- if (dev->isCheckpointed) {
- yaffs_VerifyObjects(dev);
- yaffs_VerifyBlocks(dev);
- yaffs_VerifyFreeChunks(dev);
- }
+ yaffs_rd_chunk_tags_nand(dev, old_chunk,
+ buffer, &tags);
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
+ object = yaffs_find_by_number(dev, tags.obj_id);
- return retval;
-}
+ T(YAFFS_TRACE_GC_DETAIL,
+ (TSTR
+ ("Collecting chunk in block %d, %d %d %d "
+ TENDSTR), dev->gc_chunk, tags.obj_id,
+ tags.chunk_id, tags.n_bytes));
+
+ if (object && !yaffs_skip_verification(dev)) {
+ if (tags.chunk_id == 0)
+ matching_chunk =
+ object->hdr_chunk;
+ else if (object->soft_del)
+ matching_chunk = old_chunk; /* Defeat the test */
+ else
+ matching_chunk =
+ yaffs_find_chunk_in_file
+ (object, tags.chunk_id,
+ NULL);
-/*--------------------- File read/write ------------------------
- * Read and write have very similar structures.
- * In general the read/write has three parts to it
- * An incomplete chunk to start with (if the read/write is not chunk-aligned)
- * Some complete chunks
- * An incomplete chunk to end off with
- *
- * Curve-balls: the first chunk might also be the last chunk.
- */
+ if (old_chunk != matching_chunk)
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("gc: page in gc mismatch: %d %d %d %d"
+ TENDSTR), old_chunk,
+ matching_chunk, tags.obj_id,
+ tags.chunk_id));
-int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
- int nBytes)
-{
+ }
- int chunk;
- __u32 start;
- int nToCopy;
- int n = nBytes;
- int nDone = 0;
- yaffs_ChunkCache *cache;
+ if (!object) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("page %d in gc has no object: %d %d %d "
+ TENDSTR), old_chunk,
+ tags.obj_id, tags.chunk_id,
+ tags.n_bytes));
+ }
- yaffs_Device *dev;
+ 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.
+ */
- dev = in->myDev;
+ /* 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--;
- while (n > 0) {
- /* chunk = offset / dev->nDataBytesPerChunk + 1; */
- /* start = offset % dev->nDataBytesPerChunk; */
- yaffs_AddrToChunk(dev, offset, &chunk, &start);
- chunk++;
+ object->n_data_chunks--;
- /* 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 (object->n_data_chunks <= 0) {
+ /* remeber to clean up the object */
+ dev->gc_cleanup_list[dev->
+ n_clean_ups]
+ = tags.obj_id;
+ dev->n_clean_ups++;
+ }
+ mark_flash = 0;
+ } else if (0) {
+ /* Todo object && object->deleted && object->n_data_chunks == 0 */
+ /* Deleted object header with no data chunks.
+ * Can be discarded and the file deleted.
+ */
+ object->hdr_chunk = 0;
+ yaffs_free_tnode(object->my_dev,
+ object->
+ variant.file_variant.
+ top);
+ object->variant.file_variant.top = NULL;
+ yaffs_generic_obj_del(object);
- cache = yaffs_FindChunkCache(in, chunk);
+ } 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++;
- /* If the chunk is already in the cache or it is less than a whole chunk
- * or we're using inband tags then use the cache (if there is caching)
- * else bypass the cache.
- */
- if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
- if (dev->nShortOpCaches > 0) {
+ dev->n_gc_copies++;
- /* If we can't find the data in the cache, then load it up. */
+ if (tags.chunk_id == 0) {
+ /* It is an object Id,
+ * We need to nuke the shrinkheader flags first
+ * Also need to clean up shadowing.
+ * We no longer want the shrink_header flag since its work is done
+ * and if it is left in place it will mess up scanning.
+ */
- if (!cache) {
- cache = yaffs_GrabChunkCache(in->myDev);
- cache->object = in;
- cache->chunkId = chunk;
- cache->dirty = 0;
- cache->locked = 0;
- yaffs_ReadChunkDataFromObject(in, chunk,
- cache->
- data);
- cache->nBytes = 0;
- }
+ struct yaffs_obj_hdr *oh;
+ oh = (struct yaffs_obj_hdr *)
+ buffer;
+
+ oh->is_shrink = 0;
+ tags.extra_is_shrink = 0;
+
+ oh->shadows_obj = 0;
+ oh->inband_shadowed_obj_id = 0;
+ tags.extra_shadows = 0;
+
+ /* Update file size */
+ if (object->variant_type ==
+ YAFFS_OBJECT_TYPE_FILE) {
+ oh->file_size =
+ object->variant.
+ file_variant.
+ file_size;
+ tags.extra_length =
+ oh->file_size;
+ }
- yaffs_UseChunkCache(dev, cache, 0);
+ 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);
+ }
+
+ if (new_chunk < 0) {
+ ret_val = YAFFS_FAIL;
+ } else {
- cache->locked = 1;
+ /* Ok, now fix up the Tnodes etc. */
+ if (tags.chunk_id == 0) {
+ /* It's a header */
+ object->hdr_chunk =
+ new_chunk;
+ object->serial =
+ tags.serial_number;
+ } else {
+ /* It's a data chunk */
+ int ok;
+ ok = yaffs_put_chunk_in_file(object, tags.chunk_id, new_chunk, 0);
+ }
+ }
+ }
- memcpy(buffer, &cache->data[start], nToCopy);
+ if (ret_val == YAFFS_OK)
+ yaffs_chunk_del(dev, old_chunk,
+ mark_flash, __LINE__);
- cache->locked = 0;
- } else {
- /* Read into the local buffer then copy..*/
+ }
+ }
- __u8 *localBuffer =
- yaffs_GetTempBuffer(dev, __LINE__);
- yaffs_ReadChunkDataFromObject(in, chunk,
- localBuffer);
+ yaffs_release_temp_buffer(dev, buffer, __LINE__);
- memcpy(buffer, &localBuffer[start], nToCopy);
+ }
+ yaffs_verify_collected_blk(dev, bi, block);
- yaffs_ReleaseTempBuffer(dev, localBuffer,
- __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 */
+ 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;
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("yaffs: About to finally delete object %d"
+ TENDSTR), object->obj_id));
+ yaffs_generic_obj_del(object);
+ object->my_dev->n_deleted_files--;
}
- } else {
-
- /* A full chunk. Read directly into the supplied buffer. */
- yaffs_ReadChunkDataFromObject(in, chunk, buffer);
-
}
- n -= nToCopy;
- offset += nToCopy;
- buffer += nToCopy;
- nDone += nToCopy;
-
+ chunks_after = yaffs_get_erased_chunks(dev);
+ if (chunks_before >= chunks_after) {
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("gc did not increase free chunks before %d after %d"
+ TENDSTR), chunks_before, chunks_after));
+ }
+ dev->gc_block = 0;
+ dev->gc_chunk = 0;
+ dev->n_clean_ups = 0;
}
- return nDone;
+ dev->gc_disable = 0;
+
+ return ret_val;
}
-int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
- int nBytes, int writeThrough)
+/*
+ * FindBlockForgarbageCollection is used to select the dirtiest block (or close enough)
+ * for garbage collection.
+ */
+
+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;
- int chunk;
- __u32 start;
- int nToCopy;
- int n = nBytes;
- int nDone = 0;
- int nToWriteBack;
- int startOfWrite = offset;
- int chunkWritten = 0;
- __u32 nBytesRead;
- __u32 chunkStart;
-
- yaffs_Device *dev;
-
- dev = in->myDev;
-
- while (n > 0 && chunkWritten >= 0) {
- /* chunk = offset / dev->nDataBytesPerChunk + 1; */
- /* start = offset % dev->nDataBytesPerChunk; */
- yaffs_AddrToChunk(dev, offset, &chunk, &start);
-
- if (chunk * dev->nDataBytesPerChunk + start != offset ||
- start >= dev->nDataBytesPerChunk) {
- T(YAFFS_TRACE_ERROR, (
- TSTR("AddrToChunk of offset %d gives chunk %d start %d"
- TENDSTR),
- (int)offset, chunk, start));
+ /* 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++) {
+
+ 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++;
}
- chunk++;
- /* OK now check for the curveball where the start and end are in
- * the same chunk.
+ /*
+ * 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.
*/
- if ((start + n) < dev->nDataBytesPerChunk) {
- nToCopy = n;
+ if (prioritised_exist &&
+ !selected && dev->oldest_dirty_block > 0)
+ selected = dev->oldest_dirty_block;
- /* 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.
- */
+ if (!prioritised_exist) /* None found, so we can clear this */
+ dev->has_pending_prioritised_gc = 0;
+ }
+
+ /* 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.
+ */
- chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
+ 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;
- if (chunkStart > in->variant.fileVariant.fileSize)
- nBytesRead = 0; /* Past end of file */
+ if (background)
+ max_threshold = dev->param.chunks_per_block / 2;
else
- nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
-
- if (nBytesRead > dev->nDataBytesPerChunk)
- nBytesRead = dev->nDataBytesPerChunk;
+ max_threshold = dev->param.chunks_per_block / 8;
- nToWriteBack =
- (nBytesRead >
- (start + n)) ? nBytesRead : (start + n);
+ if (max_threshold < YAFFS_GC_PASSIVE_THRESHOLD)
+ max_threshold = YAFFS_GC_PASSIVE_THRESHOLD;
- if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
- YBUG();
+ 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;
- } else {
- nToCopy = dev->nDataBytesPerChunk - start;
- nToWriteBack = dev->nDataBytesPerChunk;
+ iterations = n_blocks / 16 + 1;
+ if (iterations > 100)
+ iterations = 100;
}
- if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
- /* 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->nShortOpCaches > 0) {
- yaffs_ChunkCache *cache;
- /* If we can't find the data in the cache, then load the cache */
- cache = yaffs_FindChunkCache(in, chunk);
-
- if (!cache
- && yaffs_CheckSpaceForAllocation(in->
- myDev)) {
- cache = yaffs_GrabChunkCache(in->myDev);
- cache->object = in;
- cache->chunkId = 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.
- */
- cache = NULL;
- }
-
- if (cache) {
- yaffs_UseChunkCache(dev, cache, 1);
- cache->locked = 1;
-
+ 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;
+
+ bi = yaffs_get_block_info(dev, dev->gc_block_finder);
+
+ pages_used = bi->pages_in_use - bi->soft_del_pages;
+
+ 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;
+ }
+ }
- memcpy(&cache->data[start], buffer,
- nToCopy);
+ if (dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold)
+ selected = dev->gc_dirtiest;
+ }
+ /*
+ * If nothing has been selected for a while, try selecting the oldest dirty
+ * because that's gumming up the works.
+ */
- cache->locked = 0;
- cache->nBytes = nToWriteBack;
+ 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;
+ }
+ }
- if (writeThrough) {
- chunkWritten =
- yaffs_WriteChunkDataToObject
- (cache->object,
- cache->chunkId,
- cache->data, cache->nBytes,
- 1);
- cache->dirty = 0;
- }
+ if (selected) {
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("GC Selected block %d with %d free, prioritised:%d"
+ TENDSTR), selected,
+ dev->param.chunks_per_block - dev->gc_pages_in_use,
+ prioritised));
+
+ dev->n_gc_blocks++;
+ if (background)
+ dev->bg_gcs++;
+
+ 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++;
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s"
+ TENDSTR), dev->gc_block_finder, dev->gc_not_done, threshold,
+ dev->gc_dirtiest, dev->gc_pages_in_use,
+ dev->oldest_dirty_block, background ? " bg" : ""));
+ }
- } else {
- chunkWritten = -1; /* fail the write */
- }
- } else {
- /* An incomplete start or end chunk (or maybe both start and end chunk)
- * Read into the local buffer then copy, then copy over and write back.
- */
+ return selected;
+}
- __u8 *localBuffer =
- yaffs_GetTempBuffer(dev, __LINE__);
+/* 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_check_gc(struct yaffs_dev *dev, int background)
+{
+ int aggressive = 0;
+ int gc_ok = YAFFS_OK;
+ int max_tries = 0;
+ int min_erased;
+ int erased_chunks;
+ int checkpt_block_adjust;
- yaffs_ReadChunkDataFromObject(in, chunk,
- localBuffer);
+ if (dev->param.gc_control && (dev->param.gc_control(dev) & 1) == 0)
+ return YAFFS_OK;
+ if (dev->gc_disable) {
+ /* 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 collection does not increase space.
+ */
- memcpy(&localBuffer[start], buffer, nToCopy);
+ do {
+ max_tries++;
- chunkWritten =
- yaffs_WriteChunkDataToObject(in, chunk,
- localBuffer,
- nToWriteBack,
- 0);
+ checkpt_block_adjust = yaffs_calc_checkpt_blocks_required(dev);
- yaffs_ReleaseTempBuffer(dev, localBuffer,
- __LINE__);
+ min_erased =
+ dev->param.n_reserved_blocks + checkpt_block_adjust + 1;
+ erased_chunks =
+ dev->n_erased_blocks * dev->param.chunks_per_block;
+ /* 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;
+
+ 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;
}
+ }
- } else {
- /* A full chunk. Write directly from the supplied buffer. */
+ dev->gc_skip = 5;
+ /* 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;
+ }
- chunkWritten =
- yaffs_WriteChunkDataToObject(in, chunk, buffer,
- dev->nDataBytesPerChunk,
- 0);
+ if (dev->gc_block > 0) {
+ dev->all_gcs++;
+ if (!aggressive)
+ dev->passive_gc_count++;
- /* Since we've overwritten the cached data, we better invalidate it. */
- yaffs_InvalidateChunkCache(in, chunk);
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("yaffs: GC n_erased_blocks %d aggressive %d"
+ TENDSTR), dev->n_erased_blocks, aggressive));
+
+ gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive);
}
- if (chunkWritten >= 0) {
- n -= nToCopy;
- offset += nToCopy;
- buffer += nToCopy;
- nDone += nToCopy;
+ if (dev->n_erased_blocks < (dev->param.n_reserved_blocks)
+ && dev->gc_block > 0) {
+ T(YAFFS_TRACE_GC,
+ (TSTR
+ ("yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d"
+ TENDSTR), 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;
+}
- /* Update file object */
+/*
+ * 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.
+ */
+int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency)
+{
+ int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block;
- if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
- in->variant.fileVariant.fileSize = (startOfWrite + nDone);
+ T(YAFFS_TRACE_BACKGROUND, (TSTR("Background gc %u" TENDSTR), urgency));
- in->dirty = 1;
+ yaffs_check_gc(dev, 1);
+ return erased_chunks > dev->n_free_chunks / 2;
+}
+
+/*------------------------- TAGS --------------------------------*/
+
+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;
- return nDone;
}
+/*-------------------- Data file manipulation -----------------*/
-/* ---------------------- File resizing stuff ------------------ */
+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;
+
+ if (!tags) {
+ /* Passed a NULL, so use our own tags space */
+ tags = &local_tags;
+ }
+
+ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
+
+ if (tn) {
+ the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
+
+ ret_val =
+ yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
+ inode_chunk);
+ }
+ return ret_val;
+}
-static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
+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;
- yaffs_Device *dev = in->myDev;
- int oldFileSize = in->variant.fileVariant.fileSize;
+ struct yaffs_dev *dev = in->my_dev;
+ int ret_val = -1;
- int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
+ if (!tags) {
+ /* Passed a NULL, so use our own tags space */
+ tags = &local_tags;
+ }
- int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
- dev->nDataBytesPerChunk;
- int i;
- int chunkId;
+ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
- /* Delete backwards so that we don't end up with holes if
- * power is lost part-way through the operation.
- */
- for (i = lastDel; i >= startDel; i--) {
- /* NB this could be optimised somewhat,
- * eg. could retrieve the tags and write them without
- * using yaffs_DeleteChunk
- */
+ if (tn) {
- 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__);
- }
- }
+ the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
+
+ ret_val =
+ yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
+ inode_chunk);
+
+ /* Delete the entry in the filestructure (if found) */
+ if (ret_val != -1)
+ yaffs_load_tnode_0(dev, tn, inode_chunk, 0);
}
+ return ret_val;
}
-int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
+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.
+ */
- int oldFileSize = in->variant.fileVariant.fileSize;
- __u32 newSizeOfPartialChunk;
- int newFullChunks;
-
- yaffs_Device *dev = in->myDev;
-
- yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
+ 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_FlushFilesChunkCache(in);
- yaffs_InvalidateWholeChunkCache(in);
+ 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) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs tragedy:attempt to put data chunk into a non-file"
+ TENDSTR)));
+ YBUG();
+ }
- yaffs_CheckGarbageCollection(dev);
+ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
+ return YAFFS_OK;
+ }
- if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
+ tn = yaffs_add_find_tnode_0(dev,
+ &in->variant.file_variant,
+ inode_chunk, NULL);
+ if (!tn)
return YAFFS_FAIL;
- if (newSize == oldFileSize)
+ if (!nand_chunk)
+ /* Dummy insert, bail now */
return YAFFS_OK;
- if (newSize < oldFileSize) {
+ existing_cunk = yaffs_get_group_base(dev, tn, inode_chunk);
+
+ 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 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.
+ */
- yaffs_PruneResizedChunks(in, newSize);
+ 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.
+ * Forward scanning YAFFS2: The new one is what we use, dump the old one.
+ * YAFFS1: Get both sets of tags and compare serial numbers.
+ */
- if (newSizeOfPartialChunk != 0) {
- int lastChunk = 1 + newFullChunks;
+ if (in_scan > 0) {
+ /* Only do this for forward scanning */
+ yaffs_rd_chunk_tags_nand(dev,
+ nand_chunk,
+ NULL, &new_tags);
- __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
+ /* Do a proper find */
+ existing_cunk =
+ yaffs_find_chunk_in_file(in, inode_chunk,
+ &existing_tags);
+ }
- /* Got to read and rewrite the last chunk with its new size and zero pad */
- yaffs_ReadChunkDataFromObject(in, lastChunk,
- localBuffer);
+ if (existing_cunk <= 0) {
+ /*Hoosterman - how did this happen? */
- memset(localBuffer + newSizeOfPartialChunk, 0,
- dev->nDataBytesPerChunk - newSizeOfPartialChunk);
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs tragedy: existing chunk < 0 in scan"
+ TENDSTR)));
- yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
- newSizeOfPartialChunk, 1);
+ }
- yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
- }
+ /* NB The deleted flags should be false, otherwise the chunks will
+ * not be loaded during a scan
+ */
- in->variant.fileVariant.fileSize = newSize;
+ if (in_scan > 0) {
+ new_serial = new_tags.serial_number;
+ existing_serial = existing_tags.serial_number;
+ }
+
+ 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
+ * Use existing.
+ * 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;
+ }
+ }
- yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
- } else {
- /* newsSize > oldFileSize */
- in->variant.fileVariant.fileSize = newSize;
}
+ if (existing_cunk == 0)
+ in->n_data_chunks++;
- /* 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
- * and is not shadowed.
- */
- if (in->parent &&
- !in->isShadowed &&
- in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
- in->parent->objectId != YAFFS_OBJECTID_DELETED)
- yaffs_UpdateObjectHeader(in, NULL, 0,
- (newSize < oldFileSize) ? 1 : 0, 0);
+ yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk);
return YAFFS_OK;
}
-loff_t yaffs_GetFileSize(yaffs_Object *obj)
+static int yaffs_rd_data_obj(struct yaffs_obj *in, int inode_chunk, u8 * buffer)
{
- obj = yaffs_GetEquivalentObject(obj);
+ int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL);
- 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:
+ if (nand_chunk >= 0)
+ return yaffs_rd_chunk_tags_nand(in->my_dev, nand_chunk,
+ buffer, NULL);
+ else {
+ T(YAFFS_TRACE_NANDACCESS,
+ (TSTR("Chunk %d not found zero instead" TENDSTR),
+ nand_chunk));
+ /* get sane (zero) data if you read a hole */
+ memset(buffer, 0, in->my_dev->data_bytes_per_chunk);
return 0;
}
-}
-
-
-
-int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync)
-{
- int retVal;
- if (in->dirty) {
- yaffs_FlushFilesChunkCache(in);
- if(dataSync) /* Only sync data */
- retVal=YAFFS_OK;
- else {
- if (updateTime) {
-#ifdef CONFIG_YAFFS_WINCE
- yfsd_WinFileTimeNow(in->win_mtime);
-#else
-
- in->yst_mtime = Y_CURRENT_TIME;
-
-#endif
- }
-
- retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
- 0) ? YAFFS_OK : YAFFS_FAIL;
- }
- } else {
- retVal = YAFFS_OK;
- }
-
- return retVal;
}
-static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
+void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash,
+ int lyn)
{
+ int block;
+ int page;
+ struct yaffs_ext_tags tags;
+ struct yaffs_block_info *bi;
- /* First off, invalidate the file's data in the cache, without flushing. */
- yaffs_InvalidateWholeChunkCache(in);
+ if (chunk_id <= 0)
+ return;
- 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, _Y("deleted"), 0, 0);
+ dev->n_deletions++;
+ block = chunk_id / dev->param.chunks_per_block;
+ page = chunk_id % dev->param.chunks_per_block;
- }
+ if (!yaffs_check_chunk_bit(dev, block, page))
+ T(YAFFS_TRACE_VERIFY,
+ (TSTR("Deleting invalid chunk %d" TENDSTR), chunk_id));
- yaffs_RemoveObjectFromDirectory(in);
- yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
- in->hdrChunk = 0;
+ bi = yaffs_get_block_info(dev, block);
- yaffs_FreeObject(in);
- return YAFFS_OK;
+ yaffs2_update_oldest_dirty_seq(dev, block, bi);
-}
+ T(YAFFS_TRACE_DELETION,
+ (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunk_id));
-/* yaffs_DeleteFile deletes the whole file data
- * and the inode associated with the file.
- * It does not delete the links associated with the file.
- */
-static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
-{
+ if (!dev->param.is_yaffs2 && mark_flash &&
+ bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) {
- int retVal;
- int immediateDeletion = 0;
+ yaffs_init_tags(&tags);
-#ifdef __KERNEL__
- if (!in->myInode)
- immediateDeletion = 1;
-#else
- if (in->inUse <= 0)
- immediateDeletion = 1;
-#endif
+ tags.is_deleted = 1;
- if (immediateDeletion) {
- retVal =
- yaffs_ChangeObjectName(in, in->myDev->deletedDir,
- _Y("deleted"), 0, 0);
- T(YAFFS_TRACE_TRACING,
- (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
- in->objectId));
- in->deleted = 1;
- in->myDev->nDeletedFiles++;
- if (1 || in->myDev->isYaffs2)
- yaffs_ResizeFile(in, 0);
- yaffs_SoftDeleteFile(in);
+ yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags);
+ yaffs_handle_chunk_update(dev, chunk_id, &tags);
} else {
- retVal =
- yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
- _Y("unlinked"), 0, 0);
+ dev->n_unmarked_deletions++;
}
+ /* 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_SCANNING ||
+ bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) {
+ dev->n_free_chunks++;
- return retVal;
-}
-
-int yaffs_DeleteFile(yaffs_Object *in)
-{
- int retVal = YAFFS_OK;
- int deleted = in->deleted;
-
- yaffs_ResizeFile(in, 0);
+ yaffs_clear_chunk_bit(dev, block, page);
- if (in->nDataChunks > 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)
- retVal = yaffs_UnlinkFileIfNeeded(in);
+ bi->pages_in_use--;
- if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
- in->deleted = 1;
- deleted = 1;
- in->myDev->nDeletedFiles++;
- yaffs_SoftDeleteFile(in);
+ if (bi->pages_in_use == 0 &&
+ !bi->has_shrink_hdr &&
+ bi->block_state != YAFFS_BLOCK_STATE_ALLOCATING &&
+ bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+ yaffs_block_became_dirty(dev, block);
}
- 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);
- return YAFFS_OK;
}
-}
-static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj)
-{
- return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) &&
- !(ylist_empty(&obj->variant.directoryVariant.children));
}
-static int yaffs_DeleteDirectory(yaffs_Object *obj)
+static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk,
+ const u8 * buffer, int n_bytes, int use_reserve)
{
- /* First check that the directory is empty. */
- if (yaffs_IsNonEmptyDirectory(obj))
- return YAFFS_FAIL;
+ /* Find old chunk Need to do this to get serial number
+ * Write new one and patch into tree.
+ * Invalidate old tags.
+ */
- return yaffs_DoGenericObjectDeletion(obj);
-}
+ int prev_chunk_id;
+ struct yaffs_ext_tags prev_tags;
-static int yaffs_DeleteSymLink(yaffs_Object *in)
-{
- YFREE(in->variant.symLinkVariant.alias);
+ int new_chunk_id;
+ struct yaffs_ext_tags new_tags;
- return yaffs_DoGenericObjectDeletion(in);
-}
+ struct yaffs_dev *dev = in->my_dev;
-static int yaffs_DeleteHardLink(yaffs_Object *in)
-{
- /* remove this hardlink from the list assocaited with the equivalent
- * object
+ yaffs_check_gc(dev, 0);
+
+ /* 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.
*/
- ylist_del_init(&in->hardLinks);
- return yaffs_DoGenericObjectDeletion(in);
-}
+ 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;
-int yaffs_DeleteObject(yaffs_Object *obj)
-{
-int retVal = -1;
- switch (obj->variantType) {
- case YAFFS_OBJECT_TYPE_FILE:
- retVal = yaffs_DeleteFile(obj);
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- return yaffs_DeleteDirectory(obj);
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- retVal = yaffs_DeleteSymLink(obj);
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- retVal = yaffs_DeleteHardLink(obj);
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- retVal = yaffs_DoGenericObjectDeletion(obj);
- break;
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- retVal = 0;
- break; /* should not happen. */
+ /* Set up new tags */
+ yaffs_init_tags(&new_tags);
+
+ 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 (n_bytes < 1 || n_bytes > dev->param.total_bytes_per_chunk) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR),
+ n_bytes));
+ YBUG();
}
- return retVal;
-}
+ new_chunk_id =
+ yaffs_write_new_chunk(dev, buffer, &new_tags, use_reserve);
-static int yaffs_UnlinkWorker(yaffs_Object *obj)
-{
+ if (new_chunk_id > 0) {
+ yaffs_put_chunk_in_file(in, inode_chunk, new_chunk_id, 0);
- int immediateDeletion = 0;
+ if (prev_chunk_id > 0)
+ yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__);
-#ifdef __KERNEL__
- if (!obj->myInode)
- immediateDeletion = 1;
-#else
- if (obj->inUse <= 0)
- immediateDeletion = 1;
-#endif
+ yaffs_verify_file_sane(in);
+ }
+ return new_chunk_id;
- if(obj)
- yaffs_UpdateParent(obj->parent);
+}
- if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
- return yaffs_DeleteHardLink(obj);
- } else if (!ylist_empty(&obj->hardLinks)) {
- /* Curve ball: We're unlinking an object that has a hardlink.
- *
- * This problem arises because we are not strictly following
- * The Linux link/inode model.
- *
- * We can't really delete the object.
- * 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)
- * - Rename the object to the hardlink's name.
- * - Delete the hardlink
- */
+/* 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)
+{
- yaffs_Object *hl;
- int retVal;
- YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
+ struct yaffs_block_info *bi;
- hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
+ struct yaffs_dev *dev = in->my_dev;
- ylist_del_init(&hl->hardLinks);
- ylist_del_init(&hl->siblings);
+ int prev_chunk_id;
+ int ret_val = 0;
+ int result = 0;
- yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
+ int new_chunk_id;
+ struct yaffs_ext_tags new_tags;
+ struct yaffs_ext_tags old_tags;
+ const YCHAR *alias = NULL;
- retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
+ u8 *buffer = NULL;
+ YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1];
- if (retVal == YAFFS_OK)
- retVal = yaffs_DoGenericObjectDeletion(hl);
+ struct yaffs_obj_hdr *oh = NULL;
- return retVal;
+ yaffs_strcpy(old_name, _Y("silly old name"));
- } else if (immediateDeletion) {
- switch (obj->variantType) {
- case YAFFS_OBJECT_TYPE_FILE:
- return yaffs_DeleteFile(obj);
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- return yaffs_DeleteDirectory(obj);
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- return yaffs_DeleteSymLink(obj);
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- return yaffs_DoGenericObjectDeletion(obj);
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- default:
- return YAFFS_FAIL;
- }
- } else if(yaffs_IsNonEmptyDirectory(obj))
- return YAFFS_FAIL;
- else
- return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
- _Y("unlinked"), 0, 0);
-}
+ if (!in->fake || in == dev->root_dir || /* The root_dir should also be saved */
+ force || xmod) {
+ yaffs_check_gc(dev, 0);
+ yaffs_check_obj_details_loaded(in);
-static int yaffs_UnlinkObject(yaffs_Object *obj)
-{
+ buffer = yaffs_get_temp_buffer(in->my_dev, __LINE__);
+ oh = (struct yaffs_obj_hdr *)buffer;
- if (obj && obj->unlinkAllowed)
- return yaffs_UnlinkWorker(obj);
+ prev_chunk_id = in->hdr_chunk;
- return YAFFS_FAIL;
+ if (prev_chunk_id > 0) {
+ result = yaffs_rd_chunk_tags_nand(dev, prev_chunk_id,
+ buffer, &old_tags);
-}
-int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
-{
- yaffs_Object *obj;
+ yaffs_verify_oh(in, oh, &old_tags, 0);
- obj = yaffs_FindObjectByName(dir, name);
- return yaffs_UnlinkObject(obj);
-}
+ 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);
+ }
-/*----------------------- Initialisation Scanning ---------------------- */
+ oh->type = in->variant_type;
+ oh->yst_mode = in->yst_mode;
+ oh->shadows_obj = oh->inband_shadowed_obj_id = shadows;
-static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
- int backwardScanning)
-{
- yaffs_Object *obj;
+ yaffs_load_attribs_oh(oh, in);
- if (!backwardScanning) {
- /* Handle YAFFS1 forward scanning case
- * For YAFFS1 we always do the deletion
- */
+ if (in->parent)
+ oh->parent_obj_id = in->parent->obj_id;
+ else
+ oh->parent_obj_id = 0;
- } else {
- /* Handle YAFFS2 case (backward scanning)
- * If the shadowed object exists then ignore.
- */
- obj = yaffs_FindObjectByNumber(dev, objId);
- if(obj)
- return;
- }
+ 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));
+ }
- /* 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);
- if (!obj)
- return;
- obj->isShadowed = 1;
- 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 */
+ oh->is_shrink = is_shrink;
+
+ switch (in->variant_type) {
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ /* Should not happen */
+ break;
+ case YAFFS_OBJECT_TYPE_FILE:
+ oh->file_size =
+ (oh->parent_obj_id == YAFFS_OBJECTID_DELETED
+ || oh->parent_obj_id ==
+ YAFFS_OBJECTID_UNLINKED) ? 0 : in->
+ variant.file_variant.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);
-typedef struct {
- int seq;
- int block;
-} yaffs_BlockIndex;
+ /* Tags */
+ yaffs_init_tags(&new_tags);
+ in->serial++;
+ new_tags.chunk_id = 0;
+ new_tags.obj_id = in->obj_id;
+ new_tags.serial_number = in->serial;
+ /* Add extra info for file header */
-static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
-{
- yaffs_Object *hl;
- yaffs_Object *in;
+ new_tags.extra_available = 1;
+ new_tags.extra_parent_id = oh->parent_obj_id;
+ new_tags.extra_length = oh->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;
- while (hardList) {
- hl = hardList;
- hardList = (yaffs_Object *) (hardList->hardLinks.next);
+ yaffs_verify_oh(in, oh, &new_tags, 1);
- in = yaffs_FindObjectByNumber(dev,
- hl->variant.hardLinkVariant.
- equivalentObjectId);
+ /* Create new chunk in NAND */
+ new_chunk_id =
+ yaffs_write_new_chunk(dev, buffer, &new_tags,
+ (prev_chunk_id > 0) ? 1 : 0);
- if (in) {
- /* Add the hardlink pointers */
- hl->variant.hardLinkVariant.equivalentObject = in;
- ylist_add(&hl->hardLinks, &in->hardLinks);
- } else {
- /* Todo Need to report/handle this better.
- * Got a problem... hardlink to a non-existant object
- */
- hl->variant.hardLinkVariant.equivalentObject = NULL;
- YINIT_LIST_HEAD(&hl->hardLinks);
+ if (new_chunk_id >= 0) {
- }
- }
-}
+ in->hdr_chunk = new_chunk_id;
+ if (prev_chunk_id > 0) {
+ yaffs_chunk_del(dev, prev_chunk_id, 1,
+ __LINE__);
+ }
+ if (!yaffs_obj_cache_dirty(in))
+ in->dirty = 0;
+ /* 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;
+ }
+ }
-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;
-}
+ ret_val = new_chunk_id;
+ }
-struct yaffs_ShadowFixerStruct {
- int objectId;
- int shadowedId;
- struct yaffs_ShadowFixerStruct *next;
-};
+ if (buffer)
+ yaffs_release_temp_buffer(dev, buffer, __LINE__);
+ return ret_val;
+}
-static void yaffs_StripDeletedObjects(yaffs_Device *dev)
-{
- /*
- * Sort out state of unlinked and deleted objects after scanning.
- */
- struct ylist_head *i;
- struct ylist_head *n;
- yaffs_Object *l;
+/*------------------------ 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 limited number (~10) of cache chunks per device so that we don't
+ * need a very intelligent search.
+ */
- /* Soft delete all the unlinked files */
- ylist_for_each_safe(i, n,
- &dev->unlinkedDir->variant.directoryVariant.children) {
- if (i) {
- l = ylist_entry(i, yaffs_Object, siblings);
- yaffs_DeleteObject(l);
- }
- }
+static int yaffs_obj_cache_dirty(struct yaffs_obj *obj)
+{
+ struct yaffs_dev *dev = obj->my_dev;
+ int i;
+ struct yaffs_cache *cache;
+ int n_caches = obj->my_dev->param.n_caches;
- ylist_for_each_safe(i, n,
- &dev->deletedDir->variant.directoryVariant.children) {
- if (i) {
- l = ylist_entry(i, yaffs_Object, siblings);
- yaffs_DeleteObject(l);
- }
+ for (i = 0; i < n_caches; i++) {
+ cache = &dev->cache[i];
+ if (cache->object == obj && cache->dirty)
+ return 1;
}
+ return 0;
}
-static int yaffs_Scan(yaffs_Device *dev)
+static void yaffs_flush_file_cache(struct yaffs_obj *obj)
{
- yaffs_ExtendedTags tags;
- int blk;
- int blockIterator;
- int startIterator;
- int endIterator;
- int result;
+ 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;
- int chunk;
- int c;
- int deleted;
- yaffs_BlockState state;
- yaffs_Object *hardList = NULL;
- yaffs_BlockInfo *bi;
- __u32 sequenceNumber;
- yaffs_ObjectHeader *oh;
- yaffs_Object *in;
- yaffs_Object *parent;
+ if (n_caches > 0) {
+ do {
+ cache = NULL;
- int alloc_failed = 0;
+ /* Find the dirty cache for this object with the lowest chunk id. */
+ 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;
+ }
+ }
+ }
- struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
+ 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;
+ }
- __u8 *chunkData;
+ } while (cache && chunk_written > 0);
+ if (cache) {
+ /* Hoosterman, disk full while writing cache out. */
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs tragedy: no space during cache write"
+ TENDSTR)));
+ }
+ }
- T(YAFFS_TRACE_SCAN,
- (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
- dev->internalStartBlock, dev->internalEndBlock));
+}
- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+/*yaffs_flush_whole_cache(dev)
+ *
+ *
+ */
- dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
+void yaffs_flush_whole_cache(struct yaffs_dev *dev)
+{
+ struct yaffs_obj *obj;
+ int n_caches = dev->param.n_caches;
+ int i;
- /* 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;
+ /* 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;
- yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
+ }
+ if (obj)
+ yaffs_flush_file_cache(obj);
- bi->blockState = state;
- bi->sequenceNumber = sequenceNumber;
+ } while (obj);
- if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
- bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
+}
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
- state, sequenceNumber));
+/* 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 i;
- 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;
+ if (dev->param.n_caches > 0) {
+ for (i = 0; i < dev->param.n_caches; i++) {
+ if (!dev->cache[i].object)
+ return &dev->cache[i];
}
}
- startIterator = dev->internalStartBlock;
- endIterator = dev->internalEndBlock;
+ return NULL;
+}
- /* For each block.... */
- for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
- blockIterator++) {
+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;
- YYIELD();
+ if (dev->param.n_caches > 0) {
+ /* Try find a non-dirty one... */
- YYIELD();
+ cache = yaffs_grab_chunk_worker(dev);
- blk = blockIterator;
+ 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.
+ */
- bi = yaffs_GetBlockInfo(dev, blk);
- state = bi->blockState;
+ /* With locking we can't assume we can use entry zero */
- deleted = 0;
+ the_obj = NULL;
+ usage = -1;
+ cache = NULL;
+ pushout = -1;
- /* 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;
+ 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;
+ }
+ }
- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
- &tags);
+ if (!cache || cache->dirty) {
+ /* Flush and try again */
+ yaffs_flush_file_cache(the_obj);
+ cache = yaffs_grab_chunk_worker(dev);
+ }
- /* Let's have a good look at this chunk... */
+ }
+ return cache;
+ } else {
+ return NULL;
+ }
+}
- if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
- /* YAFFS1 only...
- * A deleted chunk
- */
- deleted++;
- dev->nFreeChunks++;
- /*T((" %d %d deleted\n",blk,c)); */
- } else if (!tags.chunkUsed) {
- /* An unassigned chunk in the block
- * This means that either the block is empty or
- * this is the one being allocated from
- */
+/* Find a cached chunk */
+static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj,
+ int chunk_id)
+{
+ struct yaffs_dev *dev = obj->my_dev;
+ int i;
+ if (dev->param.n_caches > 0) {
+ 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++;
- 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. */
+ return &dev->cache[i];
+ }
+ }
+ }
+ return NULL;
+}
- }
+/* 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)
+{
- dev->nFreeChunks += (dev->nChunksPerBlock - c);
- } else if (tags.chunkId > 0) {
- /* chunkId > 0 so it is a data chunk... */
- unsigned int endpos;
+ if (dev->param.n_caches > 0) {
+ if (dev->cache_last_use < 0 || dev->cache_last_use > 100000000) {
+ /* Reset the cache usages */
+ int i;
+ for (i = 1; i < dev->param.n_caches; i++)
+ dev->cache[i].last_use = 0;
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
+ dev->cache_last_use = 0;
+ }
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.
- objectId,
- YAFFS_OBJECT_TYPE_FILE);
- /* PutChunkIntoFile checks for a clash (two data chunks with
- * the same chunkId).
- */
+ dev->cache_last_use++;
- if (!in)
- alloc_failed = 1;
+ cache->last_use = dev->cache_last_use;
- if (in) {
- if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
- alloc_failed = 1;
- }
+ if (is_write)
+ cache->dirty = 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;
- }
+/* 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_invalidate_chunk_cache(struct yaffs_obj *object, int chunk_id)
+{
+ if (object->my_dev->param.n_caches > 0) {
+ struct yaffs_cache *cache =
+ yaffs_find_chunk_cache(object, chunk_id);
- }
- /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
- } else {
- /* chunkId == 0, so it is an ObjectHeader.
- * Thus, we read in the object header and make the object
- */
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
+ if (cache)
+ cache->object = NULL;
+ }
+}
- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
- chunkData,
- NULL);
+/* 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;
- oh = (yaffs_ObjectHeader *) chunkData;
+ 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;
+ }
+ }
+}
- 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.
- */
+/*--------------------- File read/write ------------------------
+ * Read and write have very similar structures.
+ * In general the read/write has three parts to it
+ * An incomplete chunk to start with (if the read/write is not chunk-aligned)
+ * Some complete chunks
+ * An incomplete chunk to end off with
+ *
+ * Curve-balls: the first chunk might also be the last chunk.
+ */
- yaffs_DeleteObject(in);
+int yaffs_file_rd(struct yaffs_obj *in, u8 * buffer, loff_t offset, int n_bytes)
+{
- in = 0;
- }
+ int chunk;
+ u32 start;
+ int n_copy;
+ int n = n_bytes;
+ int n_done = 0;
+ struct yaffs_cache *cache;
- in = yaffs_FindOrCreateObjectByNumber(dev,
- tags.
- objectId,
- oh->type);
+ struct yaffs_dev *dev;
- if (!in)
- alloc_failed = 1;
+ dev = in->my_dev;
- if (in && oh->shadowsObject > 0) {
+ while (n > 0) {
+ /* chunk = offset / dev->data_bytes_per_chunk + 1; */
+ /* start = offset % dev->data_bytes_per_chunk; */
+ yaffs_addr_to_chunk(dev, offset, &chunk, &start);
+ chunk++;
- struct yaffs_ShadowFixerStruct *fixer;
- fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
- if (fixer) {
- fixer->next = shadowFixerList;
- shadowFixerList = fixer;
- fixer->objectId = tags.objectId;
- fixer->shadowedId = oh->shadowsObject;
- }
+ /* OK now check for the curveball where the start and end are in
+ * the same chunk.
+ */
+ if ((start + n) < dev->data_bytes_per_chunk)
+ n_copy = n;
+ else
+ n_copy = dev->data_bytes_per_chunk - start;
- }
+ cache = yaffs_find_chunk_cache(in, chunk);
- if (in && in->valid) {
- /* We have already filled this one. We have a duplicate and need to resolve it. */
+ /* 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 || n_copy != dev->data_bytes_per_chunk
+ || dev->param.inband_tags) {
+ if (dev->param.n_caches > 0) {
- unsigned existingSerial = in->serial;
- unsigned newSerial = tags.serialNumber;
+ /* If we can't find the data in the cache, then load it up. */
- if (((existingSerial + 1) & 3) == newSerial) {
- /* Use new one - destroy the exisiting one */
- yaffs_DeleteChunk(dev,
- in->hdrChunk,
- 1, __LINE__);
- in->valid = 0;
- } else {
- /* Use existing - destroy this one. */
- yaffs_DeleteChunk(dev, chunk, 1,
- __LINE__);
- }
+ if (!cache) {
+ cache =
+ yaffs_grab_chunk_cache(in->my_dev);
+ cache->object = in;
+ cache->chunk_id = chunk;
+ cache->dirty = 0;
+ cache->locked = 0;
+ yaffs_rd_data_obj(in, chunk,
+ cache->data);
+ cache->n_bytes = 0;
}
- if (in && !in->valid &&
- (tags.objectId == YAFFS_OBJECTID_ROOT ||
- tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
- /* We only load some info, don't fiddle with directory structure */
- in->valid = 1;
- in->variantType = oh->type;
-
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
-#endif
- in->hdrChunk = chunk;
- in->serial = tags.serialNumber;
-
- } else if (in && !in->valid) {
- /* we need to load this info */
-
- in->valid = 1;
- in->variantType = oh->type;
-
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
-#endif
- in->hdrChunk = chunk;
- in->serial = tags.serialNumber;
-
- yaffs_SetObjectName(in, oh->name);
- in->dirty = 0;
-
- /* directory stuff...
- * hook up to parent
- */
+ yaffs_use_cache(dev, cache, 0);
- parent =
- yaffs_FindOrCreateObjectByNumber
- (dev, oh->parentObjectId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
- if (!parent)
- alloc_failed = 1;
- if (parent && parent->variantType ==
- YAFFS_OBJECT_TYPE_UNKNOWN) {
- /* Set up as a directory */
- parent->variantType =
- YAFFS_OBJECT_TYPE_DIRECTORY;
- YINIT_LIST_HEAD(&parent->variant.
- directoryVariant.
- children);
- } else if (!parent || parent->variantType !=
- YAFFS_OBJECT_TYPE_DIRECTORY) {
- /* Hoosterman, another problem....
- * We're trying to use a non-directory as a directory
- */
+ cache->locked = 1;
- 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;
- }
+ memcpy(buffer, &cache->data[start], n_copy);
- yaffs_AddObjectToDirectory(parent, in);
+ cache->locked = 0;
+ } else {
+ /* Read into the local buffer then copy.. */
- 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.
- */
+ u8 *local_buffer =
+ yaffs_get_temp_buffer(dev, __LINE__);
+ yaffs_rd_data_obj(in, chunk, local_buffer);
- switch (in->variantType) {
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* Todo got a problem */
- break;
- case YAFFS_OBJECT_TYPE_FILE:
- 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 ylist_head *)
- hardList;
- hardList = in;
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- in->variant.symLinkVariant.alias =
- yaffs_CloneString(oh->alias);
- if (!in->variant.symLinkVariant.alias)
- alloc_failed = 1;
- break;
- }
+ memcpy(buffer, &local_buffer[start], n_copy);
-/*
- if (parent == dev->deletedDir) {
- yaffs_DestroyObject(in);
- bi->hasShrinkHeader = 1;
- }
-*/
- }
+ yaffs_release_temp_buffer(dev, local_buffer,
+ __LINE__);
}
- }
- 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;
- }
+ } else {
- bi->blockState = state;
+ /* A full chunk. Read directly into the supplied buffer. */
+ yaffs_rd_data_obj(in, chunk, buffer);
- /* Now let's see if it was dirty */
- if (bi->pagesInUse == 0 &&
- !bi->hasShrinkHeader &&
- bi->blockState == YAFFS_BLOCK_STATE_FULL) {
- yaffs_BlockBecameDirty(dev, blk);
}
- }
+ n -= n_copy;
+ offset += n_copy;
+ buffer += n_copy;
+ n_done += n_copy;
+ }
- /* 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.
- */
+ return n_done;
+}
- yaffs_HardlinkFixup(dev, hardList);
+int yaffs_do_file_wr(struct yaffs_obj *in, const u8 * buffer, loff_t offset,
+ int n_bytes, int write_trhrough)
+{
- /* Fix up any shadowed objects */
- {
- struct yaffs_ShadowFixerStruct *fixer;
- yaffs_Object *obj;
+ int chunk;
+ u32 start;
+ int n_copy;
+ int n = n_bytes;
+ int n_done = 0;
+ int n_writeback;
+ int start_write = offset;
+ int chunk_written = 0;
+ u32 n_bytes_read;
+ u32 chunk_start;
- while (shadowFixerList) {
- fixer = shadowFixerList;
- shadowFixerList = fixer->next;
- /* Complete the rename transaction by deleting the shadowed object
- * then setting the object header to unshadowed.
- */
- obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
- if (obj)
- yaffs_DeleteObject(obj);
+ struct yaffs_dev *dev;
- obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
+ dev = in->my_dev;
- if (obj)
- yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
+ while (n > 0 && chunk_written >= 0) {
+ yaffs_addr_to_chunk(dev, offset, &chunk, &start);
- YFREE(fixer);
+ if (chunk * dev->data_bytes_per_chunk + start != offset ||
+ start >= dev->data_bytes_per_chunk) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("AddrToChunk of offset %d gives chunk %d start %d"
+ TENDSTR), (int)offset, chunk, start));
}
- }
+ chunk++; /* File pos to chunk in file offset */
- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+ /* OK now check for the curveball where the start and end are in
+ * the same chunk.
+ */
- if (alloc_failed)
- return YAFFS_FAIL;
+ if ((start + n) < dev->data_bytes_per_chunk) {
+ n_copy = n;
- T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
+ /* 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.
+ */
+ chunk_start = ((chunk - 1) * dev->data_bytes_per_chunk);
- return YAFFS_OK;
-}
+ 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;
-static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
-{
- __u8 *chunkData;
- yaffs_ObjectHeader *oh;
- yaffs_Device *dev;
- yaffs_ExtendedTags tags;
- int result;
- int alloc_failed = 0;
+ if (n_bytes_read > dev->data_bytes_per_chunk)
+ n_bytes_read = dev->data_bytes_per_chunk;
- if (!in)
- return;
+ n_writeback =
+ (n_bytes_read >
+ (start + n)) ? n_bytes_read : (start + n);
- dev = in->myDev;
+ if (n_writeback < 0
+ || n_writeback > dev->data_bytes_per_chunk)
+ YBUG();
+
+ } else {
+ n_copy = dev->data_bytes_per_chunk - start;
+ n_writeback = dev->data_bytes_per_chunk;
+ }
-#if 0
- T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
- in->objectId,
- in->lazyLoaded ? "not yet" : "already"));
-#endif
+ 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 (in->lazyLoaded && in->hdrChunk > 0) {
- in->lazyLoaded = 0;
- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+ if (!cache
+ && yaffs_check_alloc_available(dev, 1)) {
+ cache = yaffs_grab_chunk_cache(dev);
+ cache->object = in;
+ cache->chunk_id = chunk;
+ cache->dirty = 0;
+ cache->locked = 0;
+ 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;
+ }
- result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
- oh = (yaffs_ObjectHeader *) chunkData;
+ if (cache) {
+ yaffs_use_cache(dev, cache, 1);
+ cache->locked = 1;
- 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;
+ memcpy(&cache->data[start], buffer,
+ n_copy);
-#endif
- yaffs_SetObjectName(in, oh->name);
+ cache->locked = 0;
+ cache->n_bytes = n_writeback;
- if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
- in->variant.symLinkVariant.alias =
- yaffs_CloneString(oh->alias);
- if (!in->variant.symLinkVariant.alias)
- alloc_failed = 1; /* Not returned to caller */
- }
+ if (write_trhrough) {
+ chunk_written =
+ yaffs_wr_data_obj
+ (cache->object,
+ cache->chunk_id,
+ cache->data,
+ cache->n_bytes, 1);
+ cache->dirty = 0;
+ }
- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
- }
-}
+ } else {
+ chunk_written = -1; /* fail the write */
+ }
+ } else {
+ /* An incomplete start or end chunk (or maybe both start and end chunk)
+ * Read into the local buffer then copy, then copy over and write back.
+ */
-static int yaffs_ScanBackwards(yaffs_Device *dev)
-{
- yaffs_ExtendedTags tags;
- int blk;
- int blockIterator;
- int startIterator;
- int endIterator;
- int nBlocksToScan = 0;
+ u8 *local_buffer =
+ yaffs_get_temp_buffer(dev, __LINE__);
- int chunk;
- int result;
- int c;
- int deleted;
- yaffs_BlockState state;
- yaffs_Object *hardList = NULL;
- yaffs_BlockInfo *bi;
- __u32 sequenceNumber;
- yaffs_ObjectHeader *oh;
- yaffs_Object *in;
- yaffs_Object *parent;
- int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
- int itsUnlinked;
- __u8 *chunkData;
-
- int fileSize;
- int isShrink;
- int foundChunksInBlock;
- int equivalentObjectId;
- int alloc_failed = 0;
+ yaffs_rd_data_obj(in, chunk, local_buffer);
+ memcpy(&local_buffer[start], buffer, n_copy);
- yaffs_BlockIndex *blockIndex = NULL;
- int altBlockIndex = 0;
+ chunk_written =
+ yaffs_wr_data_obj(in, chunk,
+ local_buffer,
+ n_writeback, 0);
- if (!dev->isYaffs2) {
- T(YAFFS_TRACE_SCAN,
- (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
- return YAFFS_FAIL;
- }
+ yaffs_release_temp_buffer(dev, local_buffer,
+ __LINE__);
- T(YAFFS_TRACE_SCAN,
- (TSTR
- ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
- TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
+ }
+ } else {
+ /* A full chunk. Write directly from the supplied buffer. */
- dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
+ chunk_written =
+ yaffs_wr_data_obj(in, chunk, buffer,
+ dev->data_bytes_per_chunk, 0);
- blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
+ /* Since we've overwritten the cached data, we better invalidate it. */
+ yaffs_invalidate_chunk_cache(in, chunk);
+ }
- if (!blockIndex) {
- blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
- altBlockIndex = 1;
- }
+ if (chunk_written >= 0) {
+ n -= n_copy;
+ offset += n_copy;
+ buffer += n_copy;
+ n_done += n_copy;
+ }
- 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;
+ /* Update file object */
- yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
+ if ((start_write + n_done) > in->variant.file_variant.file_size)
+ in->variant.file_variant.file_size = (start_write + n_done);
- bi->blockState = state;
- bi->sequenceNumber = sequenceNumber;
+ in->dirty = 1;
- if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
- bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
- if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
- bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
+ return n_done;
+}
- T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
- state, sequenceNumber));
+int yaffs_wr_file(struct yaffs_obj *in, const u8 * buffer, loff_t offset,
+ int n_bytes, int write_trhrough)
+{
+ yaffs2_handle_hole(in, offset);
+ return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_trhrough);
+}
+/* ---------------------- File resizing stuff ------------------ */
- if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
- dev->blocksInCheckpoint++;
+static void yaffs_prune_chunks(struct yaffs_obj *in, int new_size)
+{
- } 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) {
+ struct yaffs_dev *dev = in->my_dev;
+ int old_size = in->variant.file_variant.file_size;
- /* Determine the highest sequence number */
- if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
- sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
+ int last_del = 1 + (old_size - 1) / dev->data_bytes_per_chunk;
- blockIndex[nBlocksToScan].seq = sequenceNumber;
- blockIndex[nBlocksToScan].block = blk;
+ int start_del = 1 + (new_size + dev->data_bytes_per_chunk - 1) /
+ dev->data_bytes_per_chunk;
+ int i;
+ int chunk_id;
- nBlocksToScan++;
+ /* Delete backwards so that we don't end up with holes if
+ * power is lost part-way through the operation.
+ */
+ 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_chunk_del
+ */
- if (sequenceNumber >= dev->sequenceNumber)
- dev->sequenceNumber = sequenceNumber;
- } else {
- /* TODO: Nasty sequence number! */
- T(YAFFS_TRACE_SCAN,
+ chunk_id = yaffs_find_del_file_chunk(in, i, NULL);
+ if (chunk_id > 0) {
+ if (chunk_id <
+ (dev->internal_start_block *
+ dev->param.chunks_per_block)
+ || chunk_id >=
+ ((dev->internal_end_block +
+ 1) * dev->param.chunks_per_block)) {
+ T(YAFFS_TRACE_ALWAYS,
(TSTR
- ("Block scanning block %d has bad sequence number %d"
- TENDSTR), blk, sequenceNumber));
-
+ ("Found daft chunk_id %d for %d" TENDSTR),
+ chunk_id, i));
+ } else {
+ in->n_data_chunks--;
+ yaffs_chunk_del(dev, chunk_id, 1, __LINE__);
}
}
}
- 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
+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;
- YYIELD();
+ yaffs_addr_to_chunk(dev, new_size, &new_full, &new_partial);
- T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
+ yaffs_prune_chunks(obj, new_size);
- /* 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));
+ if (new_partial != 0) {
+ int last_chunk = 1 + new_full;
+ u8 *local_buffer = yaffs_get_temp_buffer(dev, __LINE__);
- /* 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();
+ /* Got to read and 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);
- /* get the block to scan in the correct order */
- blk = blockIndex[blockIterator].block;
+ yaffs_wr_data_obj(obj, last_chunk, local_buffer,
+ new_partial, 1);
- bi = yaffs_GetBlockInfo(dev, blk);
+ yaffs_release_temp_buffer(dev, local_buffer, __LINE__);
+ }
+ obj->variant.file_variant.file_size = new_size;
- state = bi->blockState;
+ yaffs_prune_tree(dev, &obj->variant.file_variant);
+}
- deleted = 0;
+int yaffs_resize_file(struct yaffs_obj *in, loff_t new_size)
+{
+ struct yaffs_dev *dev = in->my_dev;
+ int old_size = in->variant.file_variant.file_size;
- /* 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
- */
+ yaffs_flush_file_cache(in);
+ yaffs_invalidate_whole_cache(in);
- chunk = blk * dev->nChunksPerBlock + c;
+ yaffs_check_gc(dev, 0);
- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
- &tags);
+ if (in->variant_type != YAFFS_OBJECT_TYPE_FILE)
+ return YAFFS_FAIL;
- /* Let's have a good look at this chunk... */
+ if (new_size == old_size)
+ return YAFFS_OK;
- 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 (new_size > old_size) {
+ yaffs2_handle_hole(in, new_size);
+ in->variant.file_variant.file_size = new_size;
+ } else {
+ /* new_size < old_size */
+ yaffs_resize_file_down(in, new_size);
+ }
- 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.
- */
+ /* 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
+ * and is not shadowed.
+ */
+ 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);
- /* bi->needsRetiring = 1; ??? TODO */
- bi->gcPrioritise = 1;
+ return YAFFS_OK;
+}
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("Partially written block %d detected" TENDSTR),
- blk));
- }
- }
- }
+int yaffs_flush_file(struct yaffs_obj *in, int update_time, int data_sync)
+{
+ int ret_val;
+ if (in->dirty) {
+ yaffs_flush_file_cache(in);
+ if (data_sync) /* Only sync data */
+ ret_val = YAFFS_OK;
+ else {
+ if (update_time)
+ yaffs_load_current_time(in, 0, 0);
- dev->nFreeChunks++;
+ ret_val = (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >=
+ 0) ? YAFFS_OK : YAFFS_FAIL;
+ }
+ } else {
+ ret_val = YAFFS_OK;
+ }
- } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
- T(YAFFS_TRACE_SCAN,
- (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
- blk, c));
+ return ret_val;
- 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;
+static int yaffs_generic_obj_del(struct yaffs_obj *in)
+{
- foundChunksInBlock = 1;
+ /* First off, invalidate the file's data in the cache, without flushing. */
+ yaffs_invalidate_whole_cache(in);
+ if (in->my_dev->param.is_yaffs2 && (in->parent != in->my_dev->del_dir)) {
+ /* Move to the unlinked directory so we have a record that it was deleted. */
+ yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0,
+ 0);
- 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;
- }
+ yaffs_remove_obj_from_dir(in);
+ yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__);
+ in->hdr_chunk = 0;
- 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;
- }
+ yaffs_free_obj(in);
+ return YAFFS_OK;
- /* 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 (!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;
- }
+}
- } else if (in) {
- /* This chunk has been invalidated by a resize, so delete */
- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+/* 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_unlink_file_if_needed(struct yaffs_obj *in)
+{
- }
- } else {
- /* chunkId == 0, so it is an ObjectHeader.
- * Thus, we read in the object header and make the object
- */
- foundChunksInBlock = 1;
+ int ret_val;
+ int del_now = 0;
+ struct yaffs_dev *dev = in->my_dev;
- yaffs_SetChunkBit(dev, blk, c);
- bi->pagesInUse++;
+ if (!in->my_inode)
+ del_now = 1;
- oh = NULL;
- in = NULL;
+ if (del_now) {
+ ret_val =
+ yaffs_change_obj_name(in, in->my_dev->del_dir,
+ _Y("deleted"), 0, 0);
+ T(YAFFS_TRACE_TRACING,
+ (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
+ 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);
+ }
- if (tags.extraHeaderInfoAvailable) {
- in = yaffs_FindOrCreateObjectByNumber
- (dev, tags.objectId,
- tags.extraObjectType);
- if (!in)
- alloc_failed = 1;
- }
+ return ret_val;
+}
- if (!in ||
- (!in->valid && dev->disableLazyLoad) ||
- tags.extraShadows ||
- (!in->valid &&
- (tags.objectId == YAFFS_OBJECTID_ROOT ||
- tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
+int yaffs_del_file(struct yaffs_obj *in)
+{
+ 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 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.
- */
+ if (dev->param.disable_soft_del || dev->param.is_yaffs2)
+ yaffs_resize_file(in, 0);
- result = yaffs_ReadChunkWithTagsFromNAND(dev,
- chunk,
- chunkData,
- NULL);
+ 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);
- oh = (yaffs_ObjectHeader *) chunkData;
+ deleted = in->deleted;
- if (dev->inbandTags) {
- /* Fix up the header if they got corrupted by inband tags */
- oh->shadowsObject = oh->inbandShadowsObject;
- oh->isShrink = oh->inbandIsShrink;
- }
+ if (ret_val == YAFFS_OK && in->unlinked && !in->deleted) {
+ in->deleted = 1;
+ deleted = 1;
+ in->my_dev->n_deleted_files++;
+ yaffs_soft_del_file(in);
+ }
+ return deleted ? YAFFS_OK : YAFFS_FAIL;
+ } else {
+ /* The file has no data chunks so we toss it immediately */
+ yaffs_free_tnode(in->my_dev, in->variant.file_variant.top);
+ in->variant.file_variant.top = NULL;
+ yaffs_generic_obj_del(in);
- if (!in) {
- in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
- if (!in)
- alloc_failed = 1;
- }
+ return YAFFS_OK;
+ }
+}
- }
+int yaffs_is_non_empty_dir(struct yaffs_obj *obj)
+{
+ return (obj &&
+ obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) &&
+ !(list_empty(&obj->variant.dir_variant.children));
+}
- if (!in) {
- /* TODO Hoosterman we have a problem! */
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
- TENDSTR), tags.objectId, chunk));
- continue;
- }
+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;
- 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.
- */
+ return yaffs_generic_obj_del(obj);
+}
- if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
- ((oh &&
- oh->type == YAFFS_OBJECT_TYPE_FILE) ||
- (tags.extraHeaderInfoAvailable &&
- tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
- __u32 thisSize =
- (oh) ? oh->fileSize : tags.
- extraFileLength;
- __u32 parentObjectId =
- (oh) ? oh->
- parentObjectId : tags.
- extraParentObjectId;
-
-
- isShrink =
- (oh) ? oh->isShrink : tags.
- extraIsShrinkHeader;
-
- /* If it is deleted (unlinked at start also means deleted)
- * we treat the file size as being zeroed at this point.
- */
- if (parentObjectId ==
- YAFFS_OBJECTID_DELETED
- || parentObjectId ==
- YAFFS_OBJECTID_UNLINKED) {
- thisSize = 0;
- isShrink = 1;
- }
+static int yaffs_del_symlink(struct yaffs_obj *in)
+{
+ if (in->variant.symlink_variant.alias)
+ YFREE(in->variant.symlink_variant.alias);
+ in->variant.symlink_variant.alias = NULL;
- if (isShrink &&
- in->variant.fileVariant.
- shrinkSize > thisSize) {
- in->variant.fileVariant.
- shrinkSize =
- thisSize;
- }
+ return yaffs_generic_obj_del(in);
+}
- if (isShrink)
- bi->hasShrinkHeader = 1;
+static int yaffs_del_link(struct yaffs_obj *in)
+{
+ /* remove this hardlink from the list assocaited with the equivalent
+ * object
+ */
+ list_del_init(&in->hard_links);
+ return yaffs_generic_obj_del(in);
+}
- }
- /* Use existing - destroy this one. */
- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+int yaffs_del_obj(struct yaffs_obj *obj)
+{
+ int ret_val = -1;
+ switch (obj->variant_type) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ ret_val = yaffs_del_file(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ if (!list_empty(&obj->variant.dir_variant.dirty)) {
+ T(YAFFS_TRACE_BACKGROUND,
+ (TSTR
+ ("Remove object %d from dirty directories" TENDSTR),
+ obj->obj_id));
+ list_del_init(&obj->variant.dir_variant.dirty);
+ }
+ return yaffs_del_dir(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ ret_val = yaffs_del_symlink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ ret_val = yaffs_del_link(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ ret_val = yaffs_generic_obj_del(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ ret_val = 0;
+ break; /* should not happen. */
+ }
- }
+ return ret_val;
+}
- if (!in->valid && in->variantType !=
- (oh ? oh->type : tags.extraObjectType))
- T(YAFFS_TRACE_ERROR, (
- TSTR("yaffs tragedy: Bad object type, "
- TCONT("%d != %d, for object %d at chunk ")
- TCONT("%d during scan")
- TENDSTR), oh ?
- oh->type : tags.extraObjectType,
- in->variantType, tags.objectId,
- chunk));
-
- if (!in->valid &&
- (tags.objectId == YAFFS_OBJECTID_ROOT ||
- tags.objectId ==
- YAFFS_OBJECTID_LOSTNFOUND)) {
- /* We only load some info, don't fiddle with directory structure */
- in->valid = 1;
-
- if (oh) {
- in->variantType = oh->type;
-
- in->yst_mode = oh->yst_mode;
-#ifdef CONFIG_YAFFS_WINCE
- in->win_atime[0] = oh->win_atime[0];
- in->win_ctime[0] = oh->win_ctime[0];
- in->win_mtime[0] = oh->win_mtime[0];
- in->win_atime[1] = oh->win_atime[1];
- in->win_ctime[1] = oh->win_ctime[1];
- in->win_mtime[1] = oh->win_mtime[1];
-#else
- in->yst_uid = oh->yst_uid;
- in->yst_gid = oh->yst_gid;
- in->yst_atime = oh->yst_atime;
- in->yst_mtime = oh->yst_mtime;
- in->yst_ctime = oh->yst_ctime;
- in->yst_rdev = oh->yst_rdev;
+static int yaffs_unlink_worker(struct yaffs_obj *obj)
+{
-#endif
- } else {
- in->variantType = tags.extraObjectType;
- in->lazyLoaded = 1;
- }
+ int del_now = 0;
- in->hdrChunk = chunk;
+ if (!obj->my_inode)
+ del_now = 1;
- } else if (!in->valid) {
- /* we need to load this info */
+ if (obj)
+ yaffs_update_parent(obj->parent);
- in->valid = 1;
- in->hdrChunk = chunk;
+ 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
+ * The Linux link/inode model.
+ *
+ * We can't really delete the object.
+ * Instead, we do the following:
+ * - Select a hardlink.
+ * - Unhook it from the hard links
+ * - Move it from its parent directory (so that the rename can work)
+ * - Rename the object to the hardlink's name.
+ * - Delete the hardlink
+ */
- if (oh) {
- in->variantType = oh->type;
+ struct yaffs_obj *hl;
+ struct yaffs_obj *parent;
+ int ret_val;
+ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
- 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
+ hl = list_entry(obj->hard_links.next, struct yaffs_obj,
+ hard_links);
- if (oh->shadowsObject > 0)
- yaffs_HandleShadowedObject(dev,
- oh->
- shadowsObject,
- 1);
+ yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
+ parent = hl->parent;
+ list_del_init(&hl->hard_links);
- yaffs_SetObjectName(in, oh->name);
- parent =
- yaffs_FindOrCreateObjectByNumber
- (dev, oh->parentObjectId,
- YAFFS_OBJECT_TYPE_DIRECTORY);
+ yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl);
- fileSize = oh->fileSize;
- isShrink = oh->isShrink;
- equivalentObjectId = oh->equivalentObjectId;
+ ret_val = yaffs_change_obj_name(obj, parent, name, 0, 0);
- } 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;
+ if (ret_val == YAFFS_OK)
+ ret_val = yaffs_generic_obj_del(hl);
- }
- in->dirty = 0;
+ return ret_val;
- if (!parent)
- alloc_failed = 1;
+ } else if (del_now) {
+ switch (obj->variant_type) {
+ case YAFFS_OBJECT_TYPE_FILE:
+ return yaffs_del_file(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ list_del_init(&obj->variant.dir_variant.dirty);
+ return yaffs_del_dir(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ return yaffs_del_symlink(obj);
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ 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);
+ }
+}
- /* directory stuff...
- * hook up to parent
- */
+static int yaffs_unlink_obj(struct yaffs_obj *obj)
+{
- if (parent && parent->variantType ==
- YAFFS_OBJECT_TYPE_UNKNOWN) {
- /* Set up as a directory */
- parent->variantType =
- YAFFS_OBJECT_TYPE_DIRECTORY;
- YINIT_LIST_HEAD(&parent->variant.
- directoryVariant.
- children);
- } else if (!parent || parent->variantType !=
- YAFFS_OBJECT_TYPE_DIRECTORY) {
- /* Hoosterman, another problem....
- * We're trying to use a non-directory as a directory
- */
+ if (obj && obj->unlink_allowed)
+ return yaffs_unlink_worker(obj);
- 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;
- }
+ return YAFFS_FAIL;
- yaffs_AddObjectToDirectory(parent, in);
+}
- itsUnlinked = (parent == dev->deletedDir) ||
- (parent == dev->unlinkedDir);
+int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR * name)
+{
+ struct yaffs_obj *obj;
- if (isShrink) {
- /* Mark the block as having a shrinkHeader */
- bi->hasShrinkHeader = 1;
- }
+ obj = yaffs_find_by_name(dir, name);
+ return yaffs_unlink_obj(obj);
+}
- /* 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.
- */
+/*----------------------- Initialisation Scanning ---------------------- */
- 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;
- }
+void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id,
+ int backward_scanning)
+{
+ struct yaffs_obj *obj;
- if (isShrink &&
- in->variant.fileVariant.shrinkSize > fileSize) {
- in->variant.fileVariant.shrinkSize = fileSize;
- }
+ if (!backward_scanning) {
+ /* Handle YAFFS1 forward scanning case
+ * For YAFFS1 we always do the deletion
+ */
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- if (!itsUnlinked) {
- in->variant.hardLinkVariant.equivalentObjectId =
- equivalentObjectId;
- in->hardLinks.next =
- (struct ylist_head *) hardList;
- hardList = in;
- }
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- if (oh) {
- in->variant.symLinkVariant.alias =
- yaffs_CloneString(oh->alias);
- if (!in->variant.symLinkVariant.alias)
- alloc_failed = 1;
- }
- break;
- }
+ } else {
+ /* Handle YAFFS2 case (backward scanning)
+ * If the shadowed object exists then ignore.
+ */
+ 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.
+ * We put it in unlinked dir to be cleaned up after the scanning
+ */
+ obj =
+ 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 for this file */
- }
+}
- } /* End of scanning for each chunk */
+void yaffs_link_fixup(struct yaffs_dev *dev, struct yaffs_obj *hard_list)
+{
+ struct yaffs_obj *hl;
+ struct yaffs_obj *in;
- 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;
- }
+ while (hard_list) {
+ hl = hard_list;
+ hard_list = (struct yaffs_obj *)(hard_list->hard_links.next);
- bi->blockState = state;
+ in = yaffs_find_by_number(dev,
+ hl->variant.
+ hardlink_variant.equiv_id);
- /* 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 (in) {
+ /* Add the hardlink pointers */
+ 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.hardlink_variant.equiv_obj = NULL;
+ INIT_LIST_HEAD(&hl->hard_links);
+ }
}
+}
- 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.
+static void yaffs_strip_deleted_objs(struct yaffs_dev *dev)
+{
+ /*
+ * Sort out state of unlinked and deleted objects after scanning.
*/
- yaffs_HardlinkFixup(dev, hardList);
+ struct list_head *i;
+ struct list_head *n;
+ struct yaffs_obj *l;
+ if (dev->read_only)
+ return;
- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
-
- if (alloc_failed)
- return YAFFS_FAIL;
+ /* Soft delete all the unlinked files */
+ list_for_each_safe(i, n,
+ &dev->unlinked_dir->variant.dir_variant.children) {
+ if (i) {
+ l = list_entry(i, struct yaffs_obj, siblings);
+ yaffs_del_obj(l);
+ }
+ }
- T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
+ list_for_each_safe(i, n, &dev->del_dir->variant.dir_variant.children) {
+ if (i) {
+ l = list_entry(i, struct yaffs_obj, siblings);
+ yaffs_del_obj(l);
+ }
+ }
- return YAFFS_OK;
}
-/*------------------------------ Directory Functions ----------------------------- */
+/*
+ * 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.
+ */
-static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
+static int yaffs_has_null_parent(struct yaffs_dev *dev, struct yaffs_obj *obj)
{
- struct ylist_head *lh;
- yaffs_Object *listObj;
+ return (obj == dev->del_dir ||
+ obj == dev->unlinked_dir || obj == dev->root_dir);
+}
- int count = 0;
+static void yaffs_fix_hanging_objs(struct yaffs_dev *dev)
+{
+ struct yaffs_obj *obj;
+ struct yaffs_obj *parent;
+ int i;
+ struct list_head *lh;
+ struct list_head *n;
+ int depth_limit;
+ int hanging;
- if (!obj) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
- YBUG();
+ if (dev->read_only)
return;
- }
- if (yaffs_SkipVerification(obj->myDev))
- return;
+ /* Iterate through the objects in each hash entry,
+ * looking at each object.
+ * Make sure it is rooted.
+ */
- if (!obj->parent) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
- YBUG();
- return;
+ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+ list_for_each_safe(lh, n, &dev->obj_bucket[i].list) {
+ if (lh) {
+ 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 {
+ /*
+ * Need to follow the parent chain to see if it is hanging.
+ */
+ 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;
+ }
+ if (hanging) {
+ T(YAFFS_TRACE_SCAN,
+ (TSTR
+ ("Hanging object %d moved to lost and found"
+ TENDSTR), obj->obj_id));
+ yaffs_add_obj_to_dir(dev->lost_n_found,
+ obj);
+ }
+ }
+ }
}
+}
- if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
- YBUG();
- }
+/*
+ * Delete directory contents for cleaning up lost and found.
+ */
+static void yaffs_del_dir_contents(struct yaffs_obj *dir)
+{
+ struct yaffs_obj *obj;
+ struct list_head *lh;
+ struct list_head *n;
- /* Iterate through the objects in each hash entry */
+ if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
- ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
+ list_for_each_safe(lh, n, &dir->variant.dir_variant.children) {
if (lh) {
- listObj = ylist_entry(lh, yaffs_Object, siblings);
- yaffs_VerifyObject(listObj);
- if (obj == listObj)
- count++;
- }
- }
+ obj = list_entry(lh, struct yaffs_obj, siblings);
+ if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
+ yaffs_del_dir_contents(obj);
- if (count != 1) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
- YBUG();
+ T(YAFFS_TRACE_SCAN,
+ (TSTR("Deleting lost_found object %d" TENDSTR),
+ obj->obj_id));
+
+ /* Need to use UnlinkObject since Delete would not handle
+ * hardlinked objects correctly.
+ */
+ yaffs_unlink_obj(obj);
+ }
}
+
}
-static void yaffs_VerifyDirectory(yaffs_Object *directory)
+static void yaffs_empty_l_n_f(struct yaffs_dev *dev)
{
- struct ylist_head *lh;
- yaffs_Object *listObj;
+ yaffs_del_dir_contents(dev->lost_n_found);
+}
- if (!directory) {
- YBUG();
- return;
- }
+static void yaffs_check_obj_details_loaded(struct yaffs_obj *in)
+{
+ u8 *chunk_data;
+ struct yaffs_obj_hdr *oh;
+ struct yaffs_dev *dev;
+ struct yaffs_ext_tags tags;
+ int result;
+ int alloc_failed = 0;
- if (yaffs_SkipFullVerification(directory->myDev))
+ if (!in)
return;
- if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
- YBUG();
- }
+ dev = in->my_dev;
- /* Iterate through the objects in each hash entry */
+ if (in->lazy_loaded && in->hdr_chunk > 0) {
+ in->lazy_loaded = 0;
+ chunk_data = yaffs_get_temp_buffer(dev, __LINE__);
- ylist_for_each(lh, &directory->variant.directoryVariant.children) {
- if (lh) {
- listObj = ylist_entry(lh, yaffs_Object, siblings);
- if (listObj->parent != directory) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
- YBUG();
- }
- yaffs_VerifyObjectInDirectory(listObj);
+ result =
+ yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, chunk_data,
+ &tags);
+ oh = (struct yaffs_obj_hdr *)chunk_data;
+
+ 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 to caller */
}
+
+ yaffs_release_temp_buffer(dev, chunk_data, __LINE__);
}
}
+/*------------------------------ Directory Functions ----------------------------- */
+
/*
- *yaffs_UpdateParent() handles fixing a directories mtime and ctime when a new
+ *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 void yaffs_UpdateParent(yaffs_Object *obj)
+
+static void yaffs_update_parent(struct yaffs_obj *obj)
{
- if(!obj)
+ struct yaffs_dev *dev;
+ if (!obj)
return;
-
+ dev = obj->my_dev;
obj->dirty = 1;
- obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME;
+ yaffs_load_current_time(obj, 0, 1);
+ if (dev->param.defered_dir_update) {
+ struct list_head *link = &obj->variant.dir_variant.dirty;
+
+ if (list_empty(link)) {
+ list_add(link, &dev->dirty_dirs);
+ T(YAFFS_TRACE_BACKGROUND,
+ (TSTR("Added object %d to dirty directories" TENDSTR),
+ obj->obj_id));
+ }
- yaffs_UpdateObjectHeader(obj,NULL,0,0,0);
+ } else {
+ yaffs_update_oh(obj, NULL, 0, 0, 0, NULL);
+ }
}
-static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
+void yaffs_update_dirty_dirs(struct yaffs_dev *dev)
{
- yaffs_Device *dev = obj->myDev;
- yaffs_Object *parent;
+ struct list_head *link;
+ struct yaffs_obj *obj;
+ struct yaffs_dir_var *d_s;
+ union yaffs_obj_var *o_v;
- yaffs_VerifyObjectInDirectory(obj);
- parent = obj->parent;
+ T(YAFFS_TRACE_BACKGROUND, (TSTR("Update dirty directories" TENDSTR)));
+
+ while (!list_empty(&dev->dirty_dirs)) {
+ link = dev->dirty_dirs.next;
+ list_del_init(link);
+
+ 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);
+
+ T(YAFFS_TRACE_BACKGROUND,
+ (TSTR("Update directory %d" TENDSTR), obj->obj_id));
+
+ if (obj->dirty)
+ yaffs_update_oh(obj, NULL, 0, 0, 0, NULL);
+ }
+}
+
+static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj)
+{
+ struct yaffs_dev *dev = obj->my_dev;
+ struct yaffs_obj *parent;
- yaffs_VerifyDirectory(parent);
+ yaffs_verify_obj_in_dir(obj);
+ parent = obj->parent;
- if (dev && dev->removeObjectCallback)
- dev->removeObjectCallback(obj);
+ yaffs_verify_dir(parent);
+ if (dev && dev->param.remove_obj_fn)
+ dev->param.remove_obj_fn(obj);
- ylist_del_init(&obj->siblings);
+ list_del_init(&obj->siblings);
obj->parent = NULL;
-
- yaffs_VerifyDirectory(parent);
+
+ yaffs_verify_dir(parent);
}
-static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
- yaffs_Object *obj)
+void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj)
{
if (!directory) {
T(YAFFS_TRACE_ALWAYS,
YBUG();
return;
}
- if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
T(YAFFS_TRACE_ALWAYS,
(TSTR
("tragedy: Trying to add an object to a non-directory"
YBUG();
}
+ yaffs_verify_dir(directory);
- yaffs_VerifyDirectory(directory);
-
- yaffs_RemoveObjectFromDirectory(obj);
-
+ yaffs_remove_obj_from_dir(obj);
/* Now add it */
- ylist_add(&obj->siblings, &directory->variant.directoryVariant.children);
+ list_add(&obj->siblings, &directory->variant.dir_variant.children);
obj->parent = directory;
- if (directory == obj->myDev->unlinkedDir
- || directory == obj->myDev->deletedDir) {
+ if (directory == obj->my_dev->unlinked_dir
+ || directory == obj->my_dev->del_dir) {
obj->unlinked = 1;
- obj->myDev->nUnlinkedFiles++;
- obj->renameAllowed = 0;
+ obj->my_dev->n_unlinked_files++;
+ obj->rename_allowed = 0;
}
- yaffs_VerifyDirectory(directory);
- yaffs_VerifyObjectInDirectory(obj);
+ yaffs_verify_dir(directory);
+ yaffs_verify_obj_in_dir(obj);
}
-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 ylist_head *i;
+ struct list_head *i;
YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
- yaffs_Object *l;
+ struct yaffs_obj *l;
if (!name)
return NULL;
if (!directory) {
T(YAFFS_TRACE_ALWAYS,
(TSTR
- ("tragedy: yaffs_FindObjectByName: null pointer directory"
+ ("tragedy: yaffs_find_by_name: null pointer directory"
TENDSTR)));
YBUG();
return NULL;
}
- if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
+ (TSTR("tragedy: yaffs_find_by_name: non-directory" TENDSTR)));
YBUG();
}
- sum = yaffs_CalcNameSum(name);
+ sum = yaffs_calc_name_sum(name);
- ylist_for_each(i, &directory->variant.directoryVariant.children) {
+ list_for_each(i, &directory->variant.dir_variant.children) {
if (i) {
- l = ylist_entry(i, yaffs_Object, siblings);
+ l = list_entry(i, struct yaffs_obj, siblings);
if (l->parent != directory)
YBUG();
- yaffs_CheckObjectDetailsLoaded(l);
+ yaffs_check_obj_details_loaded(l);
/* Special case for lost-n-found */
- if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
- if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0)
+ if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) {
+ if (!yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME))
return l;
- } else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0) {
+ } else if (yaffs_sum_cmp(l->sum, sum)
+ || l->hdr_chunk <= 0) {
/* LostnFound chunk called Objxxx
* Do a real check
*/
- yaffs_GetObjectName(l, buffer,
- YAFFS_MAX_NAME_LENGTH + 1);
- if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
+ yaffs_get_obj_name(l, buffer,
+ YAFFS_MAX_NAME_LENGTH + 1);
+ if (yaffs_strncmp
+ (name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
return l;
}
}
return NULL;
}
-
-#if 0
-int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
- int (*fn) (yaffs_Object *))
-{
- struct ylist_head *i;
- yaffs_Object *l;
-
- if (!theDir) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("tragedy: yaffs_FindObjectByName: null pointer directory"
- TENDSTR)));
- YBUG();
- return YAFFS_FAIL;
- }
- if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
- YBUG();
- return YAFFS_FAIL;
- }
-
- ylist_for_each(i, &theDir->variant.directoryVariant.children) {
- if (i) {
- l = ylist_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) {
+ if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) {
/* We want the object id of the equivalent object, not this one */
- obj = obj->variant.hardLinkVariant.equivalentObject;
- yaffs_CheckObjectDetailsLoaded(obj);
+ 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->hdrChunk <= 0) {
- YCHAR locName[20];
- YCHAR numString[20];
- YCHAR *x = &numString[19];
- unsigned v = obj->objectId;
- numString[19] = 0;
+ */
+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_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
- yaffs_strcat(locName, x);
- yaffs_strncpy(name, locName, buffSize - 1);
+ yaffs_strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX);
+ yaffs_strcat(local_name, x);
+ yaffs_strncpy(name, local_name, buffer_size - 1);
+ }
+}
+
+static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR * name,
+ const YCHAR * oh_name, int buff_size)
+{
+#ifdef CONFIG_YAFFS_AUTO_UNICODE
+ if (dev->param.auto_unicode) {
+ if (*oh_name) {
+ /* It is an ASCII name, so 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);
+ }
+ } else {
+#else
+ {
+#endif
+ yaffs_strncpy(name, oh_name, buff_size - 1);
+ }
+}
+
+static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR * oh_name,
+ const YCHAR * name)
+{
+#ifdef CONFIG_YAFFS_AUTO_UNICODE
+
+ int is_ascii;
+ YCHAR *w;
+
+ if (dev->param.auto_unicode) {
+
+ 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 do a unicode to ascii conversion */
+ 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 {
+ /* It is a 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
+ {
+#endif
+ yaffs_strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1);
+ }
+}
+
+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);
+ }
+#ifndef CONFIG_YAFFS_NO_SHORT_NAMES
+ else if (obj->short_name[0]) {
+ yaffs_strcpy(name, obj->short_name);
}
-#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
- else if (obj->shortName[0])
- yaffs_strcpy(name, obj->shortName);
#endif
- else {
+ else if (obj->hdr_chunk > 0) {
int result;
- __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
+ u8 *buffer = yaffs_get_temp_buffer(obj->my_dev, __LINE__);
- 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->hdrChunk > 0) {
- result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
- obj->hdrChunk, 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, __LINE__);
}
- 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)
+int 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);
- else {
+ 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 ylist_head *i;
+ struct list_head *i;
if (!obj->unlinked)
- count++; /* the object itself */
+ count++; /* the object itself */
- ylist_for_each(i, &obj->hardLinks)
- count++; /* add the hard links; */
+ 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;
}
}
-YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj)
+YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj)
{
- obj = yaffs_GetEquivalentObject(obj);
- if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
- return yaffs_CloneString(obj->variant.symLinkVariant.alias);
+ 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_CloneString(_Y(""));
+ return yaffs_clone_str(_Y(""));
}
-#ifndef CONFIG_YAFFS_WINCE
-
-int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
+static int yaffs_do_xattrib_mod(struct yaffs_obj *obj, int set,
+ const YCHAR * name, const void *value, int size,
+ int flags)
{
- unsigned int valid = attr->ia_valid;
+ struct yaffs_xattr_mod xmod;
- 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;
+ int result;
- 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);
+ xmod.set = set;
+ xmod.name = name;
+ xmod.data = value;
+ xmod.size = size;
+ xmod.flags = flags;
+ xmod.result = -ENOSPC;
- if (valid & ATTR_SIZE)
- yaffs_ResizeFile(obj, attr->ia_size);
+ result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod);
- yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
+ if (result > 0)
+ return xmod.result;
+ else
+ return -ENOSPC;
+}
- return YAFFS_OK;
+static int yaffs_apply_xattrib_mod(struct yaffs_obj *obj, char *buffer,
+ struct yaffs_xattr_mod *xmod)
+{
+ 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;
+
+ 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);
+ obj->has_xattr = nval_hasvalues(x_buffer, x_size);
+ obj->xattr_known = 1;
+
+ xmod->result = retval;
+
+ return retval;
}
-int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
+
+static int yaffs_do_xattrib_fetch(struct yaffs_obj *obj, const YCHAR * name,
+ void *value, int size)
{
- unsigned int valid = 0;
+ 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);
- 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;
+ char *x_buffer;
- 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;
+ int retval = 0;
- attr->ia_size = yaffs_GetFileSize(obj);
- valid |= ATTR_SIZE;
+ if (obj->hdr_chunk < 1)
+ return -ENODATA;
- attr->ia_valid = valid;
+ /* 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;
+ }
- return YAFFS_OK;
-}
+ buffer = (char *)yaffs_get_temp_buffer(dev, __LINE__);
+ if (!buffer)
+ return -ENOMEM;
-#endif
+ result =
+ yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, (u8 *) buffer, &tags);
+
+ if (result != YAFFS_OK)
+ retval = -ENOENT;
+ else {
+ x_buffer = buffer + x_offs;
+
+ if (!obj->xattr_known) {
+ obj->has_xattr = nval_hasvalues(x_buffer, x_size);
+ obj->xattr_known = 1;
+ }
+
+ 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, __LINE__);
+ return retval;
+}
-#if 0
-int yaffs_DumpObject(yaffs_Object *obj)
+int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name,
+ const void *value, int size, int flags)
{
- YCHAR name[257];
+ return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags);
+}
- yaffs_GetObjectName(obj, name, YAFFS_MAX_NAME_LENGTH + 1);
+int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name)
+{
+ return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0);
+}
- 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->hdrChunk,
- yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
+int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value,
+ int size)
+{
+ return yaffs_do_xattrib_fetch(obj, name, value, size);
+}
- return YAFFS_OK;
+int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size)
+{
+ return yaffs_do_xattrib_fetch(obj, NULL, buffer, size);
}
-#endif
/*---------------------------- 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;
+ dev->lost_n_found = dev->root_dir = NULL;
+ dev->unlinked_dir = dev->del_dir = NULL;
- dev->unlinkedDir =
- yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
+ dev->unlinked_dir =
+ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
- dev->deletedDir =
- yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
+ dev->del_dir =
+ yaffs_create_fake_dir(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);
+ 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);
- 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)));
+ T(YAFFS_TRACE_TRACING,
+ (TSTR("yaffs: yaffs_guts_initialise()" TENDSTR)));
/* Check stuff that must be set */
return YAFFS_FAIL;
}
- dev->internalStartBlock = dev->startBlock;
- dev->internalEndBlock = dev->endBlock;
- dev->blockOffset = 0;
- dev->chunkOffset = 0;
- dev->nFreeChunks = 0;
+ 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;
- dev->gcBlock = -1;
+ dev->gc_block = 0;
- if (dev->startBlock == 0) {
- dev->internalStartBlock = dev->startBlock + 1;
- dev->internalEndBlock = dev->endBlock + 1;
- dev->blockOffset = 1;
- dev->chunkOffset = dev->nChunksPerBlock;
+ 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->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
- (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
- (dev->inbandTags && !dev->isYaffs2) ||
- dev->nChunksPerBlock < 2 ||
- dev->nReservedBlocks < 2 ||
- dev->internalStartBlock <= 0 ||
- dev->internalEndBlock <= 0 ||
- dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)) { /* otherwise it is too small */
+ if ((!dev->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 */
T(YAFFS_TRACE_ALWAYS,
(TSTR
- ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
- TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
+ ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d "
+ TENDSTR), dev->param.total_bytes_per_chunk,
+ dev->param.is_yaffs2 ? "2" : "", dev->param.inband_tags));
return YAFFS_FAIL;
}
- if (yaffs_InitialiseNAND(dev) != YAFFS_OK) {
+ if (yaffs_init_nand(dev) != YAFFS_OK) {
T(YAFFS_TRACE_ALWAYS,
(TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
return YAFFS_FAIL;
}
/* Sort out space for inband tags, if required */
- if (dev->inbandTags)
- dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
+ 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->nDataBytesPerChunk = dev->totalBytesPerChunk;
+ 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
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) {
+ if (dev->is_mounted) {
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;
+ dev->is_mounted = 1;
/* OK now calculate a few things for the device */
/*
* Calculate all the chunk size manipulation numbers:
*/
- x = dev->nDataBytesPerChunk;
- /* We always use dev->chunkShift and dev->chunkDiv */
- dev->chunkShift = Shifts(x);
- x >>= dev->chunkShift;
- dev->chunkDiv = x;
- /* We only use chunk mask if chunkDiv is 1 */
- dev->chunkMask = (1<<dev->chunkShift) - 1;
+ 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)
bits++;
if (bits < 16)
- dev->tnodeWidth = 16;
+ dev->tnode_width = 16;
else
- dev->tnodeWidth = bits;
- } else
- dev->tnodeWidth = 16;
+ dev->tnode_width = bits;
+ } else {
+ dev->tnode_width = 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".
/* OK, we've finished verifying the device, lets 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;
void *buf;
- int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
+ 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->srCache = YMALLOC(srCacheBytes);
+ dev->cache = YMALLOC(cache_bytes);
- 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->totalBytesPerChunk);
+ 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 =
+ YMALLOC_DMA(dev->param.total_bytes_per_chunk);
}
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)
+ dev->gc_cleanup_list =
+ YMALLOC(dev->param.chunks_per_block * sizeof(u32));
+ if (!dev->gc_cleanup_list)
init_failed = 1;
}
- if (dev->isYaffs2)
- dev->useHeaderFileSize = 1;
+ if (dev->param.is_yaffs2)
+ dev->param.use_header_file_size = 1;
- 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) {
/* Now scan the flash. */
- if (dev->isYaffs2) {
- if (yaffs_CheckpointRestore(dev)) {
- yaffs_CheckObjectDetailsLoaded(dev->rootDir);
- 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);
+ T(YAFFS_TRACE_CHECKPOINT | YAFFS_TRACE_MOUNT,
+ (TSTR
+ ("yaffs: restored from checkpoint"
+ TENDSTR)));
} else {
/* Clean up the mess caused by an aborted checkpoint load
* and 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_StripDeletedObjects(dev);
+ 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) {
/* Clean up the mess */
T(YAFFS_TRACE_TRACING,
- (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR)));
+ (TSTR("yaffs: yaffs_guts_initialise() aborted.\n" TENDSTR)));
- 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_retired_writes = 0;
- dev->nRetiredBlocks = 0;
-
- yaffs_VerifyFreeChunks(dev);
- yaffs_VerifyBlocks(dev);
+ dev->n_retired_blocks = 0;
+ yaffs_verify_free_chunks(dev);
+ yaffs_verify_blocks(dev);
/* Clean up any aborted checkpoint data */
- if(!dev->isCheckpointed && dev->blocksInCheckpoint > 0)
- yaffs_InvalidateCheckpoint(dev);
+ if (!dev->is_checkpointed && dev->blocks_in_checkpt > 0)
+ yaffs2_checkpt_invalidate(dev);
T(YAFFS_TRACE_TRACING,
- (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
+ (TSTR("yaffs: yaffs_guts_initialise() done.\n" TENDSTR)));
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);
+ if (dev->param.n_caches > 0 && dev->cache) {
- for (i = 0; i < dev->nShortOpCaches; i++) {
- if (dev->srCache[i].data)
- YFREE(dev->srCache[i].data);
- dev->srCache[i].data = NULL;
+ for (i = 0; i < dev->param.n_caches; i++) {
+ if (dev->cache[i].data)
+ YFREE(dev->cache[i].data);
+ dev->cache[i].data = NULL;
}
- YFREE(dev->srCache);
- dev->srCache = NULL;
+ YFREE(dev->cache);
+ dev->cache = NULL;
}
- YFREE(dev->gcCleanupList);
+ YFREE(dev->gc_cleanup_list);
for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
- YFREE(dev->tempBuffer[i].buffer);
+ YFREE(dev->temp_buffer[i].buffer);
- dev->isMounted = 0;
+ dev->is_mounted = 0;
- if (dev->deinitialiseNAND)
- dev->deinitialiseNAND(dev);
+ 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;
- yaffs_BlockInfo *blk;
-
- for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
- b++) {
- blk = yaffs_GetBlockInfo(dev, b);
+ struct yaffs_block_info *blk;
- 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 nFree;
- int nDirtyCacheChunks;
- int blocksForCheckpoint;
+ int n_free;
+ int n_dirty_caches;
+ int blocks_for_checkpt;
int i;
-#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 */
- 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;
+ n_free -= n_dirty_caches;
- nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
+ n_free -=
+ ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block);
/* Now we figure out how much to reserve for the checkpoint and report that... */
- blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
- if (blocksForCheckpoint < 0)
- blocksForCheckpoint = 0;
-
- nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
-
- if (nFree < 0)
- nFree = 0;
-
- return nFree;
+ blocks_for_checkpt = yaffs_calc_checkpt_blocks_required(dev);
-}
-
-static int yaffs_freeVerificationFailures;
-
-static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
-{
- int counted;
- int difference;
-
- if (yaffs_SkipVerification(dev))
- return;
-
- counted = yaffs_CountFreeChunks(dev);
-
- difference = dev->nFreeChunks - counted;
+ n_free -= (blocks_for_checkpt * dev->param.chunks_per_block);
- if (difference) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
- dev->nFreeChunks, counted, difference));
- yaffs_freeVerificationFailures++;
- }
-}
-
-/*---------------------------------------- YAFFS test code ----------------------*/
+ if (n_free < 0)
+ n_free = 0;
-#define yaffs_CheckStruct(structure, syze, name) \
- do { \
- 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; \
- } \
- } while (0)
+ return n_free;
-static int yaffs_CheckStructures(void)
-{
-/* 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
-#ifndef CONFIG_YAFFS_WINCE
- yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");
-#endif
- return YAFFS_OK;
}
projects / yaffs2.git / blobdiff