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author | Gabor Juhos <juhosg@openwrt.org> | 2013-12-16 07:51:19 +0000 |
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committer | Gabor Juhos <juhosg@openwrt.org> | 2013-12-16 07:51:19 +0000 |
commit | 7e3644d3cf37cd24c3a295825200743123acbd91 (patch) | |
tree | 025ced24d4bc8a7632dcfc7b4f5d06b690fe6367 /target/linux/generic/files/fs/yaffs2/yaffs_guts.c | |
parent | 85755deaf66746d5e2d65aedfda2352d566e9a53 (diff) | |
download | upstream-7e3644d3cf37cd24c3a295825200743123acbd91.tar.gz upstream-7e3644d3cf37cd24c3a295825200743123acbd91.tar.bz2 upstream-7e3644d3cf37cd24c3a295825200743123acbd91.zip |
kernel: update yaffs code
Use the latest version of the yaffs code. Fetched from the
yaffs2 git tree and it is based on the following commit:
commit bc76682d93955cfb33051beb503ad9f8a5450578
Merge: 3a8580e ffa781d
Author: Charles Manning <cdhmanning@gmail.com>
Date: Thu Jul 11 17:46:25 2013 +1200
Merge branch 'master' of ssh://www.aleph1.co.uk/home/aleph1/git/yaffs2
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 39084
Diffstat (limited to 'target/linux/generic/files/fs/yaffs2/yaffs_guts.c')
-rw-r--r-- | target/linux/generic/files/fs/yaffs2/yaffs_guts.c | 6240 |
1 files changed, 2889 insertions, 3351 deletions
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_guts.c b/target/linux/generic/files/fs/yaffs2/yaffs_guts.c index 36e11f53c8..1fd464d68a 100644 --- a/target/linux/generic/files/fs/yaffs2/yaffs_guts.c +++ b/target/linux/generic/files/fs/yaffs2/yaffs_guts.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2010 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -10,28 +10,25 @@ * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ + #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" - +#include "yaffs_tagsmarshall.h" #include "yaffs_nand.h" - #include "yaffs_yaffs1.h" #include "yaffs_yaffs2.h" #include "yaffs_bitmap.h" #include "yaffs_verify.h" - #include "yaffs_nand.h" #include "yaffs_packedtags2.h" - #include "yaffs_nameval.h" #include "yaffs_allocator.h" +#include "yaffs_attribs.h" +#include "yaffs_summary.h" /* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */ #define YAFFS_GC_GOOD_ENOUGH 2 @@ -39,94 +36,40 @@ #include "yaffs_ecc.h" +/* Forward declarations */ +static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, + const u8 *buffer, int n_bytes, int use_reserve); -/* Robustification (if it ever comes about...) */ -static void yaffs_retire_block(yaffs_dev_t *dev, int flash_block); -static void yaffs_handle_chunk_wr_error(yaffs_dev_t *dev, int nand_chunk, - int erasedOk); -static void yaffs_handle_chunk_wr_ok(yaffs_dev_t *dev, int nand_chunk, - const __u8 *data, - const yaffs_ext_tags *tags); -static void yaffs_handle_chunk_update(yaffs_dev_t *dev, int nand_chunk, - const yaffs_ext_tags *tags); - -/* Other local prototypes */ -static void yaffs_update_parent(yaffs_obj_t *obj); -static int yaffs_unlink_obj(yaffs_obj_t *obj); -static int yaffs_obj_cache_dirty(yaffs_obj_t *obj); - -static int yaffs_write_new_chunk(yaffs_dev_t *dev, - const __u8 *buffer, - yaffs_ext_tags *tags, - int useReserve); - - -static yaffs_obj_t *yaffs_new_obj(yaffs_dev_t *dev, int number, - yaffs_obj_type type); - - -static int yaffs_apply_xattrib_mod(yaffs_obj_t *obj, char *buffer, yaffs_xattr_mod *xmod); - -static void yaffs_remove_obj_from_dir(yaffs_obj_t *obj); -static int yaffs_check_structures(void); -static int yaffs_generic_obj_del(yaffs_obj_t *in); - -static int yaffs_check_chunk_erased(struct yaffs_dev_s *dev, - int nand_chunk); - -static int yaffs_unlink_worker(yaffs_obj_t *obj); - -static int yaffs_tags_match(const yaffs_ext_tags *tags, int obj_id, - int chunkInObject); - -static int yaffs_alloc_chunk(yaffs_dev_t *dev, int useReserve, - yaffs_block_info_t **blockUsedPtr); - -static void yaffs_check_obj_details_loaded(yaffs_obj_t *in); - -static void yaffs_invalidate_whole_cache(yaffs_obj_t *in); -static void yaffs_invalidate_chunk_cache(yaffs_obj_t *object, int chunk_id); - -static int yaffs_find_chunk_in_file(yaffs_obj_t *in, int inode_chunk, - yaffs_ext_tags *tags); - -static int yaffs_verify_chunk_written(yaffs_dev_t *dev, - int nand_chunk, - const __u8 *data, - yaffs_ext_tags *tags); - - -static void yaffs_load_name_from_oh(yaffs_dev_t *dev,YCHAR *name, const YCHAR *ohName, int bufferSize); -static void yaffs_load_oh_from_name(yaffs_dev_t *dev,YCHAR *ohName, const YCHAR *name); - +static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR *name, + int buffer_size); /* Function to calculate chunk and offset */ -static void yaffs_addr_to_chunk(yaffs_dev_t *dev, loff_t addr, int *chunkOut, - __u32 *offsetOut) +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->chunk_shift); + chunk = (u32) (addr >> dev->chunk_shift); if (dev->chunk_div == 1) { /* easy power of 2 case */ - offset = (__u32)(addr & dev->chunk_mask); + offset = (u32) (addr & dev->chunk_mask); } else { /* Non power-of-2 case */ - loff_t chunkBase; + loff_t chunk_base; chunk /= dev->chunk_div; - chunkBase = ((loff_t)chunk) * dev->data_bytes_per_chunk; - 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 @@ -135,110 +78,93 @@ static void yaffs_addr_to_chunk(yaffs_dev_t *dev, loff_t addr, int *chunkOut, * be hellishly efficient. */ -static __u32 ShiftsGE(__u32 x) +static inline u32 calc_shifts_ceiling(u32 x) { - int extraBits; - int nShifts; + int extra_bits; + int shifts; - nShifts = extraBits = 0; + shifts = extra_bits = 0; while (x > 1) { if (x & 1) - extraBits++; + 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 inline u32 calc_shifts(u32 x) { - __u32 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_init_tmp_buffers(yaffs_dev_t *dev) +static int yaffs_init_tmp_buffers(struct yaffs_dev *dev) { int i; - __u8 *buf = (__u8 *)1; + u8 *buf = (u8 *) 1; memset(dev->temp_buffer, 0, sizeof(dev->temp_buffer)); for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) { - dev->temp_buffer[i].line = 0; /* not in use */ - dev->temp_buffer[i].buffer = buf = - YMALLOC_DMA(dev->param.total_bytes_per_chunk); + dev->temp_buffer[i].in_use = 0; + buf = kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); + dev->temp_buffer[i].buffer = buf; } return buf ? YAFFS_OK : YAFFS_FAIL; } -__u8 *yaffs_get_temp_buffer(yaffs_dev_t *dev, int line_no) +u8 *yaffs_get_temp_buffer(struct yaffs_dev * dev) { - int i, j; + int i; 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->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->temp_buffer[j].max_line = - dev->temp_buffer[j].line; - } - + if (dev->temp_buffer[i].in_use == 0) { + dev->temp_buffer[i].in_use = 1; return dev->temp_buffer[i].buffer; } } - T(YAFFS_TRACE_BUFFERS, - (TSTR("Out of temp buffers at line %d, other held by lines:"), - line_no)); - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) - T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->temp_buffer[i].line)); - - T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR))); - + yaffs_trace(YAFFS_TRACE_BUFFERS, "Out of temp buffers"); /* * If we got here then we have to allocate an unmanaged one * This is not good. */ dev->unmanaged_buffer_allocs++; - return YMALLOC(dev->data_bytes_per_chunk); + return kmalloc(dev->data_bytes_per_chunk, GFP_NOFS); } -void yaffs_release_temp_buffer(yaffs_dev_t *dev, __u8 *buffer, - int line_no) +void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer) { int i; @@ -246,61 +172,94 @@ void yaffs_release_temp_buffer(yaffs_dev_t *dev, __u8 *buffer, for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { if (dev->temp_buffer[i].buffer == buffer) { - dev->temp_buffer[i].line = 0; + dev->temp_buffer[i].in_use = 0; return; } } if (buffer) { /* assume it is an unmanaged one. */ - T(YAFFS_TRACE_BUFFERS, - (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR), - line_no)); - YFREE(buffer); + yaffs_trace(YAFFS_TRACE_BUFFERS, + "Releasing unmanaged temp buffer"); + kfree(buffer); dev->unmanaged_buffer_deallocs++; } } /* - * Determine if we have a managed buffer. + * Functions for robustisizing TODO + * */ -int yaffs_is_managed_tmp_buffer(yaffs_dev_t *dev, const __u8 *buffer) + +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; + (void) dev; + (void) nand_chunk; + (void) data; + (void) tags; +} - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->temp_buffer[i].buffer == buffer) - return 1; - } +static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk, + const struct yaffs_ext_tags *tags) +{ + (void) dev; + (void) nand_chunk; + (void) tags; +} - for (i = 0; i < dev->param.n_caches; i++) { - if (dev->cache[i].data == buffer) - return 1; +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++; + + if (bi->chunk_error_strikes > 3) { + bi->needs_retiring = 1; /* Too many stikes, so retire */ + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Block struck out"); + + } } +} - if (buffer == dev->checkpt_buffer) - return 1; +static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk, + int erased_ok) +{ + int flash_block = nand_chunk / dev->param.chunks_per_block; + struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR))); - return 0; + yaffs_handle_chunk_error(dev, bi); + + if (erased_ok) { + /* Was an actual write failure, + * so mark the block for retirement.*/ + bi->needs_retiring = 1; + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>> Block %d needs retiring", flash_block); + } + + /* Delete the chunk */ + yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); + yaffs_skip_rest_of_block(dev); } /* * Verification code */ - - - /* * Simple hash function. Needs to have a reasonable spread */ -static Y_INLINE int yaffs_hash_fn(int n) +static inline int yaffs_hash_fn(int n) { - n = abs(n); + if (n < 0) + n = -n; return n % YAFFS_NOBJECT_BUCKETS; } @@ -309,38 +268,36 @@ static Y_INLINE int yaffs_hash_fn(int n) * Note that root might have a presence in NAND if permissions are set. */ -yaffs_obj_t *yaffs_root(yaffs_dev_t *dev) +struct yaffs_obj *yaffs_root(struct yaffs_dev *dev) { return dev->root_dir; } -yaffs_obj_t *yaffs_lost_n_found(yaffs_dev_t *dev) +struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev) { return dev->lost_n_found; } - /* * Erased NAND checking functions */ -int yaffs_check_ff(__u8 *buffer, int n_bytes) +int yaffs_check_ff(u8 *buffer, int n_bytes) { /* Horrible, slow implementation */ while (n_bytes--) { - if (*buffer != 0xFF) + if (*buffer != 0xff) return 0; buffer++; } return 1; } -static int yaffs_check_chunk_erased(struct yaffs_dev_s *dev, - int nand_chunk) +static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk) { int retval = YAFFS_OK; - __u8 *data = yaffs_get_temp_buffer(dev, __LINE__); - yaffs_ext_tags tags; + u8 *data = yaffs_get_temp_buffer(dev); + struct yaffs_ext_tags tags; int result; result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags); @@ -348,57 +305,199 @@ static int yaffs_check_chunk_erased(struct yaffs_dev_s *dev, if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR) retval = YAFFS_FAIL; - if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) || tags.chunk_used) { - T(YAFFS_TRACE_NANDACCESS, - (TSTR("Chunk %d not erased" TENDSTR), nand_chunk)); + if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) || + tags.chunk_used) { + yaffs_trace(YAFFS_TRACE_NANDACCESS, + "Chunk %d not erased", nand_chunk); retval = YAFFS_FAIL; } - yaffs_release_temp_buffer(dev, data, __LINE__); + yaffs_release_temp_buffer(dev, data); return retval; } - -static int yaffs_verify_chunk_written(yaffs_dev_t *dev, - int nand_chunk, - const __u8 *data, - yaffs_ext_tags *tags) +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; - yaffs_ext_tags tempTags; - __u8 *buffer = yaffs_get_temp_buffer(dev,__LINE__); + struct yaffs_ext_tags temp_tags; + u8 *buffer = yaffs_get_temp_buffer(dev); int result; - - result = yaffs_rd_chunk_tags_nand(dev,nand_chunk,buffer,&tempTags); - if(memcmp(buffer,data,dev->data_bytes_per_chunk) || - tempTags.obj_id != tags->obj_id || - tempTags.chunk_id != tags->chunk_id || - tempTags.n_bytes != tags->n_bytes) + + 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; - yaffs_release_temp_buffer(dev, buffer, __LINE__); + yaffs_release_temp_buffer(dev, buffer); return retval; } -static int yaffs_write_new_chunk(struct yaffs_dev_s *dev, - const __u8 *data, - yaffs_ext_tags *tags, - int useReserve) + +int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks) +{ + int reserved_chunks; + int reserved_blocks = dev->param.n_reserved_blocks; + int checkpt_blocks; + + checkpt_blocks = yaffs_calc_checkpt_blocks_required(dev); + + reserved_chunks = + (reserved_blocks + checkpt_blocks) * dev->param.chunks_per_block; + + return (dev->n_free_chunks > (reserved_chunks + n_chunks)); +} + +static int yaffs_find_alloc_block(struct yaffs_dev *dev) +{ + int i; + struct yaffs_block_info *bi; + + if (dev->n_erased_blocks < 1) { + /* Hoosterman we've got a problem. + * Can't get space to gc + */ + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: no more erased blocks"); + + return -1; + } + + /* Find an empty block. */ + + 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; + } + + 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--; + yaffs_trace(YAFFS_TRACE_ALLOCATE, + "Allocated block %d, seq %d, %d left" , + dev->alloc_block_finder, dev->seq_number, + dev->n_erased_blocks); + return dev->alloc_block_finder; + } + } + + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs tragedy: no more erased blocks, but there should have been %d", + dev->n_erased_blocks); + + return -1; +} + +static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver, + struct yaffs_block_info **block_ptr) +{ + int ret_val; + struct yaffs_block_info *bi; + + if (dev->alloc_block < 0) { + /* Get next block to allocate off */ + dev->alloc_block = yaffs_find_alloc_block(dev); + dev->alloc_page = 0; + } + + if (!use_reserver && !yaffs_check_alloc_available(dev, 1)) { + /* No space unless we're allowed to use the reserve. */ + return -1; + } + + if (dev->n_erased_blocks < dev->param.n_reserved_blocks + && dev->alloc_page == 0) + yaffs_trace(YAFFS_TRACE_ALLOCATE, "Allocating reserve"); + + /* Next page please.... */ + if (dev->alloc_block >= 0) { + bi = yaffs_get_block_info(dev, dev->alloc_block); + + 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); + + dev->alloc_page++; + + dev->n_free_chunks--; + + /* 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; + } + + if (block_ptr) + *block_ptr = bi; + + return ret_val; + } + + yaffs_trace(YAFFS_TRACE_ERROR, + "!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!"); + + return -1; +} + +static int yaffs_get_erased_chunks(struct yaffs_dev *dev) +{ + int n; + + n = dev->n_erased_blocks * dev->param.chunks_per_block; + + if (dev->alloc_block > 0) + n += (dev->param.chunks_per_block - dev->alloc_page); + + return n; + +} + +/* + * 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) +{ + struct yaffs_block_info *bi; + + if (dev->alloc_block > 0) { + bi = yaffs_get_block_info(dev, dev->alloc_block); + if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) { + bi->block_state = YAFFS_BLOCK_STATE_FULL; + dev->alloc_block = -1; + } + } +} + +static int yaffs_write_new_chunk(struct yaffs_dev *dev, + const u8 *data, + struct yaffs_ext_tags *tags, int use_reserver) { int attempts = 0; - int writeOk = 0; + int write_ok = 0; int chunk; yaffs2_checkpt_invalidate(dev); do { - yaffs_block_info_t *bi = 0; - int erasedOk = 0; + struct yaffs_block_info *bi = 0; + int erased_ok = 0; - chunk = yaffs_alloc_chunk(dev, useReserve, &bi); + chunk = yaffs_alloc_chunk(dev, use_reserver, &bi); if (chunk < 0) { /* no space */ break; @@ -410,7 +509,7 @@ static int yaffs_write_new_chunk(struct yaffs_dev_s *dev, * * Check the first page we try to write in a block. * If the check passes then we don't need to check any - * more. If the check fails, we check again... + * more. If the check fails, we check again... * If the block has been erased, we don't need to check. * * However, if the block has been prioritised for gc, @@ -424,42 +523,42 @@ static int yaffs_write_new_chunk(struct yaffs_dev_s *dev, * 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 + * If an erase check fails or the write fails we skip the * rest of the block. */ /* let's give it a try */ attempts++; - if(dev->param.always_check_erased) + if (dev->param.always_check_erased) bi->skip_erased_check = 0; if (!bi->skip_erased_check) { - erasedOk = yaffs_check_chunk_erased(dev, chunk); - if (erasedOk != YAFFS_OK) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs chunk %d was not erased" - TENDSTR), chunk)); + erased_ok = yaffs_check_chunk_erased(dev, chunk); + if (erased_ok != YAFFS_OK) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>> yaffs chunk %d was not erased", + chunk); /* 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); + yaffs_chunk_del(dev, chunk, 1, __LINE__); + yaffs_skip_rest_of_block(dev); continue; } } - writeOk = yaffs_wr_chunk_tags_nand(dev, chunk, - data, tags); + write_ok = yaffs_wr_chunk_tags_nand(dev, chunk, data, tags); - if(!bi->skip_erased_check) - writeOk = yaffs_verify_chunk_written(dev, chunk, data, tags); + if (!bi->skip_erased_check) + write_ok = + yaffs_verify_chunk_written(dev, chunk, data, tags); - if (writeOk != YAFFS_OK) { + if (write_ok != YAFFS_OK) { /* Clean up aborted write, skip to next block and * try another chunk */ - yaffs_handle_chunk_wr_error(dev, chunk, erasedOk); + yaffs_handle_chunk_wr_error(dev, chunk, erased_ok); continue; } @@ -468,58 +567,58 @@ static int yaffs_write_new_chunk(struct yaffs_dev_s *dev, /* Copy the data into the robustification buffer */ yaffs_handle_chunk_wr_ok(dev, chunk, data, tags); - } while (writeOk != YAFFS_OK && - (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); + } while (write_ok != YAFFS_OK && + (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); - if (!writeOk) + if (!write_ok) chunk = -1; if (attempts > 1) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs write required %d attempts" TENDSTR), - attempts)); - - dev->n_retired_writes += (attempts - 1); + yaffs_trace(YAFFS_TRACE_ERROR, + "**>> yaffs write required %d attempts", + attempts); + dev->n_retried_writes += (attempts - 1); } return chunk; } - - /* * Block retiring for handling a broken block. */ -static void yaffs_retire_block(yaffs_dev_t *dev, int flash_block) +static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block) { - yaffs_block_info_t *bi = yaffs_get_block_info(dev, flash_block); + struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); yaffs2_checkpt_invalidate(dev); - - yaffs2_clear_oldest_dirty_seq(dev,bi); + + yaffs2_clear_oldest_dirty_seq(dev, bi); 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)); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Failed to mark bad and erase block %d", + flash_block); } else { - yaffs_ext_tags tags; - int chunk_id = flash_block * dev->param.chunks_per_block; + struct yaffs_ext_tags tags; + int chunk_id = + flash_block * dev->param.chunks_per_block; - __u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__); + u8 *buffer = yaffs_get_temp_buffer(dev); memset(buffer, 0xff, dev->data_bytes_per_chunk); - yaffs_init_tags(&tags); + memset(&tags, 0, sizeof(tags)); tags.seq_number = YAFFS_SEQUENCE_BAD_BLOCK; - if (dev->param.write_chunk_tags_fn(dev, chunk_id - - dev->chunk_offset, buffer, &tags) != YAFFS_OK) - T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to " - TCONT("write bad block marker to block %d") - TENDSTR), flash_block)); - - yaffs_release_temp_buffer(dev, buffer, __LINE__); + if (dev->tagger.write_chunk_tags_fn(dev, chunk_id - + dev->chunk_offset, + buffer, + &tags) != YAFFS_OK) + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Failed to write bad block marker to block %d", + flash_block); + + yaffs_release_temp_buffer(dev, buffer); } } @@ -530,110 +629,64 @@ static void yaffs_retire_block(yaffs_dev_t *dev, int flash_block) dev->n_retired_blocks++; } -/* - * Functions for robustisizing TODO - * - */ - -static void yaffs_handle_chunk_wr_ok(yaffs_dev_t *dev, int nand_chunk, - const __u8 *data, - const yaffs_ext_tags *tags) -{ - dev=dev; - nand_chunk=nand_chunk; - data=data; - tags=tags; -} +/*---------------- Name handling functions ------------*/ -static void yaffs_handle_chunk_update(yaffs_dev_t *dev, int nand_chunk, - const yaffs_ext_tags *tags) +static u16 yaffs_calc_name_sum(const YCHAR *name) { - dev=dev; - nand_chunk=nand_chunk; - tags=tags; -} + u16 sum = 0; + u16 i = 1; -void yaffs_handle_chunk_error(yaffs_dev_t *dev, yaffs_block_info_t *bi) -{ - if (!bi->gc_prioritise) { - bi->gc_prioritise = 1; - dev->has_pending_prioritised_gc = 1; - bi->chunk_error_strikes++; + if (!name) + return 0; - 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))); + while ((*name) && i < (YAFFS_MAX_NAME_LENGTH / 2)) { - } + /* 0x1f mask is case insensitive */ + sum += ((*name) & 0x1f) * i; + i++; + name++; } + return sum; } -static void yaffs_handle_chunk_wr_error(yaffs_dev_t *dev, int nand_chunk, - int erasedOk) -{ - int flash_block = nand_chunk / dev->param.chunks_per_block; - yaffs_block_info_t *bi = yaffs_get_block_info(dev, flash_block); - yaffs_handle_chunk_error(dev, bi); +void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name) +{ + memset(obj->short_name, 0, sizeof(obj->short_name)); - if (erasedOk) { - /* 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)); + if (name && !name[0]) { + yaffs_fix_null_name(obj, obj->short_name, + YAFFS_SHORT_NAME_LENGTH); + name = obj->short_name; + } else if (name && + strnlen(name, YAFFS_SHORT_NAME_LENGTH + 1) <= + YAFFS_SHORT_NAME_LENGTH) { + strcpy(obj->short_name, name); } - /* Delete the chunk */ - yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); - yaffs_skip_rest_of_block(dev); + obj->sum = yaffs_calc_name_sum(name); } - -/*---------------- Name handling functions ------------*/ - -static __u16 yaffs_calc_name_sum(const YCHAR *name) +void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj, + const struct yaffs_obj_hdr *oh) { - __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; +#ifdef CONFIG_YAFFS_AUTO_UNICODE + YCHAR tmp_name[YAFFS_MAX_NAME_LENGTH + 1]; + memset(tmp_name, 0, sizeof(tmp_name)); + yaffs_load_name_from_oh(obj->my_dev, tmp_name, oh->name, + YAFFS_MAX_NAME_LENGTH + 1); + yaffs_set_obj_name(obj, tmp_name); #else - sum += (*bname) * i; + yaffs_set_obj_name(obj, oh->name); #endif - i++; - bname++; - } - } - return sum; } -void yaffs_set_obj_name(yaffs_obj_t *obj, const YCHAR *name) +loff_t yaffs_max_file_size(struct yaffs_dev *dev) { -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - memset(obj->short_name, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1)); - if (name && yaffs_strnlen(name,YAFFS_SHORT_NAME_LENGTH+1) <= YAFFS_SHORT_NAME_LENGTH) - yaffs_strcpy(obj->short_name, name); + if(sizeof(loff_t) < 8) + return YAFFS_MAX_FILE_SIZE_32; else - obj->short_name[0] = _Y('\0'); -#endif - obj->sum = yaffs_calc_name_sum(name); -} - -void yaffs_set_obj_name_from_oh(yaffs_obj_t *obj, const yaffs_obj_header *oh) -{ -#ifdef CONFIG_YAFFS_AUTO_UNICODE - YCHAR tmpName[YAFFS_MAX_NAME_LENGTH+1]; - memset(tmpName,0,sizeof(tmpName)); - yaffs_load_name_from_oh(obj->my_dev,tmpName,oh->name,YAFFS_MAX_NAME_LENGTH+1); - yaffs_set_obj_name(obj,tmpName); -#else - yaffs_set_obj_name(obj,oh->name); -#endif + return ((loff_t) YAFFS_MAX_CHUNK_ID) * dev->data_bytes_per_chunk; } /*-------------------- TNODES ------------------- @@ -643,87 +696,87 @@ void yaffs_set_obj_name_from_oh(yaffs_obj_t *obj, const yaffs_obj_header *oh) * in the tnode. */ - -yaffs_tnode_t *yaffs_get_tnode(yaffs_dev_t *dev) +struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev) { - yaffs_tnode_t *tn = yaffs_alloc_raw_tnode(dev); - if (tn){ + struct yaffs_tnode *tn = yaffs_alloc_raw_tnode(dev); + + if (tn) { memset(tn, 0, dev->tnode_size); dev->n_tnodes++; } - dev->checkpoint_blocks_required = 0; /* force recalculation*/ + dev->checkpoint_blocks_required = 0; /* force recalculation */ return tn; } /* FreeTnode frees up a tnode and puts it back on the free list */ -static void yaffs_free_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn) +static void yaffs_free_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn) { - yaffs_free_raw_tnode(dev,tn); + yaffs_free_raw_tnode(dev, tn); dev->n_tnodes--; - dev->checkpoint_blocks_required = 0; /* force recalculation*/ + dev->checkpoint_blocks_required = 0; /* force recalculation */ } -static void yaffs_deinit_tnodes_and_objs(yaffs_dev_t *dev) +static void yaffs_deinit_tnodes_and_objs(struct yaffs_dev *dev) { yaffs_deinit_raw_tnodes_and_objs(dev); dev->n_obj = 0; dev->n_tnodes = 0; } - -void yaffs_load_tnode_0(yaffs_dev_t *dev, yaffs_tnode_t *tn, unsigned pos, - unsigned val) +static void yaffs_load_tnode_0(struct yaffs_dev *dev, struct yaffs_tnode *tn, + unsigned pos, unsigned val) { - __u32 *map = (__u32 *)tn; - __u32 bitInMap; - __u32 bitInWord; - __u32 wordInMap; - __u32 mask; + u32 *map = (u32 *) tn; + u32 bit_in_map; + u32 bit_in_word; + u32 word_in_map; + u32 mask; pos &= YAFFS_TNODES_LEVEL0_MASK; val >>= dev->chunk_grp_bits; - bitInMap = pos * dev->tnode_width; - wordInMap = bitInMap / 32; - bitInWord = bitInMap & (32 - 1); + bit_in_map = pos * dev->tnode_width; + word_in_map = bit_in_map / 32; + bit_in_word = bit_in_map & (32 - 1); - mask = dev->tnode_mask << bitInWord; + mask = dev->tnode_mask << bit_in_word; - map[wordInMap] &= ~mask; - map[wordInMap] |= (mask & (val << bitInWord)); + map[word_in_map] &= ~mask; + map[word_in_map] |= (mask & (val << bit_in_word)); - if (dev->tnode_width > (32 - bitInWord)) { - bitInWord = (32 - bitInWord); - wordInMap++;; - mask = dev->tnode_mask >> (/*dev->tnode_width -*/ bitInWord); - map[wordInMap] &= ~mask; - map[wordInMap] |= (mask & (val >> bitInWord)); + if (dev->tnode_width > (32 - bit_in_word)) { + bit_in_word = (32 - bit_in_word); + word_in_map++; + mask = + dev->tnode_mask >> bit_in_word; + map[word_in_map] &= ~mask; + map[word_in_map] |= (mask & (val >> bit_in_word)); } } -__u32 yaffs_get_group_base(yaffs_dev_t *dev, yaffs_tnode_t *tn, - unsigned pos) +u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn, + unsigned pos) { - __u32 *map = (__u32 *)tn; - __u32 bitInMap; - __u32 bitInWord; - __u32 wordInMap; - __u32 val; + u32 *map = (u32 *) tn; + u32 bit_in_map; + u32 bit_in_word; + u32 word_in_map; + u32 val; pos &= YAFFS_TNODES_LEVEL0_MASK; - bitInMap = pos * dev->tnode_width; - wordInMap = bitInMap / 32; - bitInWord = bitInMap & (32 - 1); + bit_in_map = pos * dev->tnode_width; + word_in_map = bit_in_map / 32; + bit_in_word = bit_in_map & (32 - 1); - val = map[wordInMap] >> bitInWord; + val = map[word_in_map] >> bit_in_word; - if (dev->tnode_width > (32 - bitInWord)) { - bitInWord = (32 - bitInWord); - wordInMap++;; - val |= (map[wordInMap] << bitInWord); + if (dev->tnode_width > (32 - bit_in_word)) { + bit_in_word = (32 - bit_in_word); + word_in_map++; + val |= (map[word_in_map] << bit_in_word); } val &= dev->tnode_mask; @@ -740,16 +793,16 @@ __u32 yaffs_get_group_base(yaffs_dev_t *dev, yaffs_tnode_t *tn, */ /* FindLevel0Tnode finds the level 0 tnode, if one exists. */ -yaffs_tnode_t *yaffs_find_tnode_0(yaffs_dev_t *dev, - yaffs_file_s *file_struct, - __u32 chunk_id) +struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct, + u32 chunk_id) { - yaffs_tnode_t *tn = file_struct->top; - __u32 i; - int requiredTallness; + struct yaffs_tnode *tn = file_struct->top; + u32 i; + int required_depth; int level = file_struct->top_level; - dev=dev; + (void) dev; /* Check sane level and chunk Id */ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) @@ -761,54 +814,54 @@ yaffs_tnode_t *yaffs_find_tnode_0(yaffs_dev_t *dev, /* First check we're tall enough (ie enough top_level) */ i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; + required_depth = 0; while (i) { i >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; + required_depth++; } - if (requiredTallness > file_struct->top_level) - return NULL; /* Not tall enough, so we can't find it */ + if (required_depth > file_struct->top_level) + return NULL; /* Not tall enough, so we can't find it */ /* Traverse down to level 0 */ while (level > 0 && tn) { tn = tn->internal[(chunk_id >> - (YAFFS_TNODES_LEVEL0_BITS + - (level - 1) * - YAFFS_TNODES_INTERNAL_BITS)) & - YAFFS_TNODES_INTERNAL_MASK]; + (YAFFS_TNODES_LEVEL0_BITS + + (level - 1) * + YAFFS_TNODES_INTERNAL_BITS)) & + YAFFS_TNODES_INTERNAL_MASK]; level--; } return tn; } -/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree. +/* add_find_tnode_0 finds the level 0 tnode if it exists, + * otherwise first expands the tree. * This happens in two steps: * 1. If the tree isn't tall enough, then make it taller. * 2. Scan down the tree towards the level 0 tnode adding tnodes if required. * * Used when modifying the tree. * - * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will - * be plugged into the ttree. + * If the tn argument is NULL, then a fresh tnode will be added otherwise the + * specified tn will be plugged into the ttree. */ -yaffs_tnode_t *yaffs_add_find_tnode_0(yaffs_dev_t *dev, - yaffs_file_s *file_struct, - __u32 chunk_id, - yaffs_tnode_t *passed_tn) +struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct, + u32 chunk_id, + struct yaffs_tnode *passed_tn) { - int requiredTallness; + int required_depth; int i; int l; - yaffs_tnode_t *tn; - - __u32 x; - + struct yaffs_tnode *tn; + u32 x; /* Check sane level and page Id */ - if (file_struct->top_level < 0 || file_struct->top_level > YAFFS_TNODES_MAX_LEVEL) + if (file_struct->top_level < 0 || + file_struct->top_level > YAFFS_TNODES_MAX_LEVEL) return NULL; if (chunk_id > YAFFS_MAX_CHUNK_ID) @@ -817,16 +870,15 @@ yaffs_tnode_t *yaffs_add_find_tnode_0(yaffs_dev_t *dev, /* First check we're tall enough (ie enough top_level) */ x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; + required_depth = 0; while (x) { x >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; + required_depth++; } - - if (requiredTallness > file_struct->top_level) { + if (required_depth > file_struct->top_level) { /* Not tall enough, gotta make the tree taller */ - for (i = file_struct->top_level; i < requiredTallness; i++) { + for (i = file_struct->top_level; i < required_depth; i++) { tn = yaffs_get_tnode(dev); @@ -835,8 +887,8 @@ yaffs_tnode_t *yaffs_add_find_tnode_0(yaffs_dev_t *dev, file_struct->top = tn; file_struct->top_level++; } else { - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs: no more tnodes" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs: no more tnodes"); return NULL; } } @@ -854,24 +906,24 @@ yaffs_tnode_t *yaffs_add_find_tnode_0(yaffs_dev_t *dev, (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_get_tnode(dev); - if(!tn->internal[x]) + 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 we already have one, release it */ if (tn->internal[x]) - yaffs_free_tnode(dev, tn->internal[x]); + yaffs_free_tnode(dev, + tn->internal[x]); tn->internal[x] = passed_tn; } else if (!tn->internal[x]) { /* Don't have one, none passed in */ tn->internal[x] = yaffs_get_tnode(dev); - if(!tn->internal[x]) + if (!tn->internal[x]) return NULL; } } @@ -882,7 +934,8 @@ yaffs_tnode_t *yaffs_add_find_tnode_0(yaffs_dev_t *dev, } else { /* top is level 0 */ if (passed_tn) { - memcpy(tn, passed_tn, (dev->tnode_width * YAFFS_NTNODES_LEVEL0)/8); + memcpy(tn, passed_tn, + (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8); yaffs_free_tnode(dev, passed_tn); } } @@ -890,425 +943,685 @@ yaffs_tnode_t *yaffs_add_find_tnode_0(yaffs_dev_t *dev, return tn; } -static int yaffs_find_chunk_in_group(yaffs_dev_t *dev, int theChunk, - yaffs_ext_tags *tags, int obj_id, - int inode_chunk) +static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id, + int chunk_obj) +{ + return (tags->chunk_id == chunk_obj && + tags->obj_id == obj_id && + !tags->is_deleted) ? 1 : 0; + +} + +static int yaffs_find_chunk_in_group(struct yaffs_dev *dev, int the_chunk, + struct yaffs_ext_tags *tags, int obj_id, + int inode_chunk) { int j; - for (j = 0; theChunk && j < dev->chunk_grp_size; j++) { - if (yaffs_check_chunk_bit(dev, theChunk / dev->param.chunks_per_block, - theChunk % dev->param.chunks_per_block)) { - - if(dev->chunk_grp_size == 1) - return theChunk; + for (j = 0; the_chunk && j < dev->chunk_grp_size; j++) { + if (yaffs_check_chunk_bit + (dev, the_chunk / dev->param.chunks_per_block, + the_chunk % dev->param.chunks_per_block)) { + + if (dev->chunk_grp_size == 1) + return the_chunk; else { - yaffs_rd_chunk_tags_nand(dev, theChunk, NULL, - tags); - if (yaffs_tags_match(tags, obj_id, inode_chunk)) { + yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL, + tags); + if (yaffs_tags_match(tags, + obj_id, inode_chunk)) { /* found it; */ - return theChunk; + return the_chunk; } } } - theChunk++; + the_chunk++; } return -1; } -#if 0 -/* Experimental code not being used yet. Might speed up file deletion */ -/* 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. - */ +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; + } -static int yaffs_del_worker(yaffs_obj_t *in, yaffs_tnode_t *tn, __u32 level, - int chunk_offset, int *limit) + tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); + + if (!tn) + return ret_val; + + 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 int yaffs_find_del_file_chunk(struct yaffs_obj *in, int inode_chunk, + struct yaffs_ext_tags *tags) { - int i; - int inode_chunk; - int theChunk; - yaffs_ext_tags tags; - int foundChunk; - yaffs_dev_t *dev = in->my_dev; + /* Get the Tnode, then get the level 0 offset chunk offset */ + struct yaffs_tnode *tn; + int the_chunk = -1; + struct yaffs_ext_tags local_tags; + struct yaffs_dev *dev = in->my_dev; + int ret_val = -1; - int allDone = 1; + if (!tags) { + /* Passed a NULL, so use our own tags space */ + tags = &local_tags; + } - 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_del_worker(in, - tn-> - internal - [i], - level - - 1, - (chunk_offset - << - YAFFS_TNODES_INTERNAL_BITS) - + i, - limit); - } - if (allDone) { - yaffs_free_tnode(dev, - tn-> - internal[i]); - tn->internal[i] = NULL; - } - } + tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); + + if (!tn) + return ret_val; + + 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_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. + */ + + 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; + + if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) { + /* Just ignore an attempt at putting a chunk into a non-file + * during scanning. + * If it is not during Scanning then something went wrong! + */ + if (!in_scan) { + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy:attempt to put data chunk into a non-file" + ); + BUG(); + } + + yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); + return YAFFS_OK; + } + + tn = yaffs_add_find_tnode_0(dev, + &in->variant.file_variant, + inode_chunk, NULL); + if (!tn) + return YAFFS_FAIL; + + if (!nand_chunk) + /* Dummy insert, bail now */ + return YAFFS_OK; + + 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 + * 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 (existing_cunk > 0) { + /* NB Right now existing chunk will not be real + * chunk_id if the chunk group size > 1 + * thus we have to do a FindChunkInFile to get the + * real chunk id. + * + * We have a duplicate now we need to decide which + * one to use: + * + * Backwards scanning YAFFS2: The old one is what + * we use, dump the new one. + * YAFFS1: Get both sets of tags and compare serial + * numbers. + */ + + if (in_scan > 0) { + /* Only do this for forward scanning */ + yaffs_rd_chunk_tags_nand(dev, + nand_chunk, + NULL, &new_tags); + + /* Do a proper find */ + existing_cunk = + yaffs_find_chunk_in_file(in, inode_chunk, + &existing_tags); } - return (allDone) ? 1 : 0; - } else if (level == 0) { - int hitLimit = 0; - - for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit; - i--) { - theChunk = yaffs_get_group_base(dev, tn, i); - if (theChunk) { - - inode_chunk = (chunk_offset << - YAFFS_TNODES_LEVEL0_BITS) + i; - - foundChunk = - yaffs_find_chunk_in_group(dev, - theChunk, - &tags, - in->obj_id, - inode_chunk); - - if (foundChunk > 0) { - yaffs_chunk_del(dev, - foundChunk, 1, - __LINE__); - in->n_data_chunks--; - if (limit) { - *limit = *limit - 1; - if (*limit <= 0) - hitLimit = 1; - } - } + if (existing_cunk <= 0) { + /*Hoosterman - how did this happen? */ - yaffs_load_tnode_0(dev, tn, i, 0); - } + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: existing chunk < 0 in scan" + ); } - return (i < 0) ? 1 : 0; + /* NB The deleted flags should be false, otherwise + * the chunks will not be loaded during a scan + */ + + 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 + * 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; + } } } - return 1; + if (existing_cunk == 0) + in->n_data_chunks++; -} + yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk); -#endif + return YAFFS_OK; +} -static void yaffs_soft_del_chunk(yaffs_dev_t *dev, int chunk) +static void yaffs_soft_del_chunk(struct yaffs_dev *dev, int chunk) { - yaffs_block_info_t *theBlock; + struct yaffs_block_info *the_block; unsigned block_no; - T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk)); + yaffs_trace(YAFFS_TRACE_DELETION, "soft delete chunk %d", chunk); - block_no = chunk / dev->param.chunks_per_block; - theBlock = yaffs_get_block_info(dev, block_no); - if (theBlock) { - theBlock->soft_del_pages++; + 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, theBlock); + yaffs2_update_oldest_dirty_seq(dev, block_no, the_block); } } -/* 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. +/* 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_soft_del_worker(yaffs_obj_t *in, yaffs_tnode_t *tn, - __u32 level, int chunk_offset) +static int yaffs_soft_del_worker(struct yaffs_obj *in, struct yaffs_tnode *tn, + u32 level, int chunk_offset) { int i; - int theChunk; - int allDone = 1; - yaffs_dev_t *dev = in->my_dev; + int the_chunk; + int all_done = 1; + struct yaffs_dev *dev = in->my_dev; - if (tn) { - if (level > 0) { - - for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; - i--) { - if (tn->internal[i]) { - allDone = - yaffs_soft_del_worker(in, - tn-> - internal[i], - level - 1, - (chunk_offset - << - YAFFS_TNODES_INTERNAL_BITS) - + i); - if (allDone) { - yaffs_free_tnode(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_get_group_base(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_soft_del_chunk(dev, theChunk); - yaffs_load_tnode_0(dev, tn, i, 0); - } + if (!tn) + return 1; + if (level > 0) { + for (i = YAFFS_NTNODES_INTERNAL - 1; + all_done && i >= 0; + i--) { + if (tn->internal[i]) { + all_done = + yaffs_soft_del_worker(in, + tn->internal[i], + level - 1, + (chunk_offset << + YAFFS_TNODES_INTERNAL_BITS) + + i); + if (all_done) { + yaffs_free_tnode(dev, + tn->internal[i]); + tn->internal[i] = NULL; + } else { + /* Can this happen? */ + } } - return 1; + } + return (all_done) ? 1 : 0; + } + /* level 0 */ + for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) { + the_chunk = yaffs_get_group_base(dev, tn, i); + if (the_chunk) { + yaffs_soft_del_chunk(dev, the_chunk); + yaffs_load_tnode_0(dev, tn, i, 0); } + } + return 1; +} +static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj) +{ + struct yaffs_dev *dev = obj->my_dev; + struct yaffs_obj *parent; + + yaffs_verify_obj_in_dir(obj); + parent = obj->parent; + + yaffs_verify_dir(parent); + + if (dev && dev->param.remove_obj_fn) + dev->param.remove_obj_fn(obj); + + list_del_init(&obj->siblings); + obj->parent = NULL; + + yaffs_verify_dir(parent); +} + +void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj) +{ + if (!directory) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: Trying to add an object to a null pointer directory" + ); + BUG(); + return; + } + if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: Trying to add an object to a non-directory" + ); + BUG(); } - return 1; + if (obj->siblings.prev == NULL) { + /* Not initialised */ + BUG(); + } + + yaffs_verify_dir(directory); + + yaffs_remove_obj_from_dir(obj); + + /* Now add it */ + list_add(&obj->siblings, &directory->variant.dir_variant.children); + obj->parent = directory; + + if (directory == obj->my_dev->unlinked_dir + || directory == obj->my_dev->del_dir) { + obj->unlinked = 1; + obj->my_dev->n_unlinked_files++; + obj->rename_allowed = 0; + } + yaffs_verify_dir(directory); + yaffs_verify_obj_in_dir(obj); } -static void yaffs_soft_del_file(yaffs_obj_t *obj) +static int yaffs_change_obj_name(struct yaffs_obj *obj, + struct yaffs_obj *new_dir, + const YCHAR *new_name, int force, int shadows) { - 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; - } + int unlink_op; + int del_op; + struct yaffs_obj *existing_target; + + if (new_dir == NULL) + new_dir = obj->parent; /* use the old directory */ + + if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: yaffs_change_obj_name: new_dir is not a directory" + ); + BUG(); } + + unlink_op = (new_dir == obj->my_dev->unlinked_dir); + del_op = (new_dir == obj->my_dev->del_dir); + + existing_target = yaffs_find_by_name(new_dir, new_name); + + /* If the object is a file going into the unlinked directory, + * then it is OK to just stuff it in since duplicate names are OK. + * else only proceed if the new name does not exist and we're putting + * it into a directory. + */ + if (!(unlink_op || del_op || force || + shadows > 0 || !existing_target) || + new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) + return YAFFS_FAIL; + + yaffs_set_obj_name(obj, new_name); + obj->dirty = 1; + yaffs_add_obj_to_dir(new_dir, obj); + + if (unlink_op) + obj->unlinked = 1; + + /* If it is a deletion then we mark it as a shrink for gc */ + if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >= 0) + return YAFFS_OK; + + return YAFFS_FAIL; } -/* 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. +/*------------------------ 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. * - * 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. + * There are a small number (~10) of cache chunks per device so that we don't + * need a very intelligent search. */ -static yaffs_tnode_t *yaffs_prune_worker(yaffs_dev_t *dev, yaffs_tnode_t *tn, - __u32 level, int del0) +static int yaffs_obj_cache_dirty(struct yaffs_obj *obj) { + struct yaffs_dev *dev = obj->my_dev; int i; - int hasData; + struct yaffs_cache *cache; + int n_caches = obj->my_dev->param.n_caches; - if (tn) { - hasData = 0; - - 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); - } + for (i = 0; i < n_caches; i++) { + cache = &dev->cache[i]; + if (cache->object == obj && cache->dirty) + return 1; + } + + return 0; +} - if (tn->internal[i]) - hasData++; +static void yaffs_flush_file_cache(struct yaffs_obj *obj) +{ + struct yaffs_dev *dev = obj->my_dev; + int lowest = -99; /* Stop compiler whining. */ + int i; + struct yaffs_cache *cache; + int chunk_written = 0; + int n_caches = obj->my_dev->param.n_caches; + + if (n_caches < 1) + return; + do { + cache = NULL; + + /* Find the lowest dirty chunk for this object */ + for (i = 0; i < n_caches; i++) { + if (dev->cache[i].object == obj && + dev->cache[i].dirty) { + if (!cache || + dev->cache[i].chunk_id < lowest) { + cache = &dev->cache[i]; + lowest = cache->chunk_id; + } } - } else { - int tnode_size_u32 = dev->tnode_size/sizeof(__u32); - __u32 *map = (__u32 *)tn; + } - for(i = 0; !hasData && i < tnode_size_u32; i++){ - if(map[i]) - hasData++; - } - } + if (cache && !cache->locked) { + /* Write it out and free it up */ + chunk_written = + yaffs_wr_data_obj(cache->object, + cache->chunk_id, + cache->data, + cache->n_bytes, 1); + cache->dirty = 0; + cache->object = NULL; + } + } while (cache && chunk_written > 0); - if (hasData == 0 && del0) { - /* Free and return NULL */ + if (cache) + /* Hoosterman, disk full while writing cache out. */ + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: no space during cache write"); +} - yaffs_free_tnode(dev, tn); - tn = NULL; +/*yaffs_flush_whole_cache(dev) + * + * + */ + +void yaffs_flush_whole_cache(struct yaffs_dev *dev) +{ + struct yaffs_obj *obj; + int n_caches = dev->param.n_caches; + 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 < n_caches && !obj; i++) { + if (dev->cache[i].object && dev->cache[i].dirty) + obj = dev->cache[i].object; } + if (obj) + yaffs_flush_file_cache(obj); + } while (obj); - } +} - return tn; +/* 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 (dev->param.n_caches > 0) { + for (i = 0; i < dev->param.n_caches; i++) { + if (!dev->cache[i].object) + return &dev->cache[i]; + } + } + return NULL; } -static int yaffs_prune_tree(yaffs_dev_t *dev, - yaffs_file_s *file_struct) +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 hasData; - int done = 0; - yaffs_tnode_t *tn; + int pushout; - if (file_struct->top_level > 0) { - file_struct->top = - yaffs_prune_worker(dev, file_struct->top, file_struct->top_level, 0); + if (dev->param.n_caches < 1) + return NULL; + + /* Try find a non-dirty one... */ - /* 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) + cache = yaffs_grab_chunk_worker(dev); + + if (!cache) { + /* They were all dirty, find the LRU object and flush + * its cache, then find again. + * NB what's here is not very accurate, + * we actually flush the object with the LRU chunk. */ - while (file_struct->top_level && !done) { - tn = file_struct->top; + /* With locking we can't assume we can use entry zero, + * Set the_obj to a valid pointer for Coverity. */ + the_obj = dev->cache[0].object; + usage = -1; + cache = NULL; + pushout = -1; - hasData = 0; - for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i]) - hasData++; + 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; } + } - if (!hasData) { - file_struct->top = tn->internal[0]; - file_struct->top_level--; - yaffs_free_tnode(dev, tn); - } else { - done = 1; - } + if (!cache || cache->dirty) { + /* Flush and try again */ + yaffs_flush_file_cache(the_obj); + cache = yaffs_grab_chunk_worker(dev); } } - - return YAFFS_OK; + return cache; } -/*-------------------- End of File Structure functions.-------------------*/ - - -/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */ -static yaffs_obj_t *yaffs_alloc_empty_obj(yaffs_dev_t *dev) +/* Find a cached chunk */ +static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj, + int chunk_id) { - yaffs_obj_t *obj = yaffs_alloc_raw_obj(dev); - - if (obj) { - dev->n_obj++; + struct yaffs_dev *dev = obj->my_dev; + int i; - /* Now sweeten it up... */ + if (dev->param.n_caches < 1) + return NULL; - memset(obj, 0, sizeof(yaffs_obj_t)); - obj->being_created = 1; + 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++; - obj->my_dev = dev; - obj->hdr_chunk = 0; - obj->variant_type = YAFFS_OBJECT_TYPE_UNKNOWN; - YINIT_LIST_HEAD(&(obj->hard_links)); - YINIT_LIST_HEAD(&(obj->hash_link)); - YINIT_LIST_HEAD(&obj->siblings); + 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) +{ + int i; - /* Now make the directory sane */ - if (dev->root_dir) { - obj->parent = dev->root_dir; - ylist_add(&(obj->siblings), &dev->root_dir->variant.dir_variant.children); - } + if (dev->param.n_caches < 1) + return; - /* 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->lost_n_found) - yaffs_add_obj_to_dir(dev->lost_n_found, obj); + if (dev->cache_last_use < 0 || + dev->cache_last_use > 100000000) { + /* Reset the cache usages */ + for (i = 1; i < dev->param.n_caches; i++) + dev->cache[i].last_use = 0; - obj->being_created = 0; + dev->cache_last_use = 0; } + dev->cache_last_use++; + cache->last_use = dev->cache_last_use; - dev->checkpoint_blocks_required = 0; /* force recalculation*/ - - return obj; + if (is_write) + cache->dirty = 1; } -static yaffs_obj_t *yaffs_create_fake_dir(yaffs_dev_t *dev, int number, - __u32 mode) +/* 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) { + struct yaffs_cache *cache; - yaffs_obj_t *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. */ + if (object->my_dev->param.n_caches > 0) { + cache = yaffs_find_chunk_cache(object, chunk_id); + + if (cache) + cache->object = NULL; } +} - return obj; +/* Invalidate all the cache pages associated with this object + * Do this whenever ther file is deleted or resized. + */ +static void yaffs_invalidate_whole_cache(struct yaffs_obj *in) +{ + int i; + struct yaffs_dev *dev = in->my_dev; + if (dev->param.n_caches > 0) { + /* Invalidate it. */ + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].object == in) + dev->cache[i].object = NULL; + } + } } -static void yaffs_unhash_obj(yaffs_obj_t *obj) +static void yaffs_unhash_obj(struct yaffs_obj *obj) { int bucket; - yaffs_dev_t *dev = obj->my_dev; + struct yaffs_dev *dev = obj->my_dev; /* If it is still linked into the bucket list, free from the list */ - if (!ylist_empty(&obj->hash_link)) { - ylist_del_init(&obj->hash_link); + if (!list_empty(&obj->hash_link)) { + list_del_init(&obj->hash_link); bucket = yaffs_hash_fn(obj->obj_id); dev->obj_bucket[bucket].count--; } } /* FreeObject frees up a Object and puts it back on the free list */ -static void yaffs_free_obj(yaffs_obj_t *obj) +static void yaffs_free_obj(struct yaffs_obj *obj) { - yaffs_dev_t *dev = obj->my_dev; + struct yaffs_dev *dev; - T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), obj, obj->my_inode)); - - if (!obj) - YBUG(); + if (!obj) { + BUG(); + return; + } + dev = obj->my_dev; + yaffs_trace(YAFFS_TRACE_OS, "FreeObject %p inode %p", + obj, obj->my_inode); if (obj->parent) - YBUG(); - if (!ylist_empty(&obj->siblings)) - YBUG(); - + BUG(); + if (!list_empty(&obj->siblings)) + BUG(); if (obj->my_inode) { /* We're still hooked up to a cached inode. @@ -1320,40 +1633,213 @@ static void yaffs_free_obj(yaffs_obj_t *obj) yaffs_unhash_obj(obj); - yaffs_free_raw_obj(dev,obj); + yaffs_free_raw_obj(dev, obj); dev->n_obj--; - dev->checkpoint_blocks_required = 0; /* force recalculation*/ + dev->checkpoint_blocks_required = 0; /* force recalculation */ } - -void yaffs_handle_defered_free(yaffs_obj_t *obj) +void yaffs_handle_defered_free(struct yaffs_obj *obj) { if (obj->defered_free) yaffs_free_obj(obj); } -static void yaffs_init_tnodes_and_objs(yaffs_dev_t *dev) +static int yaffs_generic_obj_del(struct yaffs_obj *in) +{ + /* Iinvalidate 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 unlinked directory so we have a deletion record */ + yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0, + 0); + } + + yaffs_remove_obj_from_dir(in); + yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__); + in->hdr_chunk = 0; + + yaffs_free_obj(in); + return YAFFS_OK; + +} + +static void yaffs_soft_del_file(struct yaffs_obj *obj) +{ + if (!obj->deleted || + obj->variant_type != YAFFS_OBJECT_TYPE_FILE || + obj->soft_del) + return; + + if (obj->n_data_chunks <= 0) { + /* Empty file with no duplicate object headers, + * just delete it immediately */ + yaffs_free_tnode(obj->my_dev, obj->variant.file_variant.top); + obj->variant.file_variant.top = NULL; + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: Deleting empty file %d", + obj->obj_id); + yaffs_generic_obj_del(obj); + } else { + yaffs_soft_del_worker(obj, + obj->variant.file_variant.top, + obj->variant. + file_variant.top_level, 0); + obj->soft_del = 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. + * + * 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. + */ + +static struct yaffs_tnode *yaffs_prune_worker(struct yaffs_dev *dev, + struct yaffs_tnode *tn, u32 level, + int del0) { int i; + int has_data; - dev->n_obj = 0; - dev->n_tnodes = 0; + if (!tn) + return tn; + + has_data = 0; + + 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); + } - yaffs_init_raw_tnodes_and_objs(dev); + if (tn->internal[i]) + has_data++; + } + } else { + int tnode_size_u32 = dev->tnode_size / sizeof(u32); + u32 *map = (u32 *) tn; - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - YINIT_LIST_HEAD(&dev->obj_bucket[i].list); - dev->obj_bucket[i].count = 0; + for (i = 0; !has_data && i < tnode_size_u32; i++) { + if (map[i]) + has_data++; + } + } + + if (has_data == 0 && del0) { + /* Free and return NULL */ + yaffs_free_tnode(dev, tn); + tn = NULL; + } + return tn; +} + +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; + + if (file_struct->top_level < 1) + return YAFFS_OK; + + file_struct->top = + yaffs_prune_worker(dev, file_struct->top, file_struct->top_level, 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 (file_struct->top_level && !done) { + tn = file_struct->top; + + has_data = 0; + for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { + if (tn->internal[i]) + has_data++; + } + + if (!has_data) { + file_struct->top = tn->internal[0]; + file_struct->top_level--; + yaffs_free_tnode(dev, tn); + } else { + done = 1; + } + } + + return YAFFS_OK; +} + +/*-------------------- End of File Structure functions.-------------------*/ + +/* alloc_empty_obj gets us a clean Object.*/ +static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev) +{ + struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev); + + if (!obj) + return obj; + + dev->n_obj++; + + /* Now sweeten it up... */ + + memset(obj, 0, sizeof(struct yaffs_obj)); + obj->being_created = 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); } + + /* 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; + + dev->checkpoint_blocks_required = 0; /* force recalculation */ + + return obj; } -static int yaffs_find_nice_bucket(yaffs_dev_t *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. */ @@ -1365,82 +1851,72 @@ static int yaffs_find_nice_bucket(yaffs_dev_t *dev) lowest = dev->obj_bucket[dev->bucket_finder].count; l = dev->bucket_finder; } - } return l; } -static int yaffs_new_obj_id(yaffs_dev_t *dev) +static int yaffs_new_obj_id(struct yaffs_dev *dev) { int bucket = yaffs_find_nice_bucket(dev); + int found = 0; + struct list_head *i; + u32 n = (u32) bucket; /* 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_check_obj_hash_sane(); */ - while (!found) { found = 1; n += YAFFS_NOBJECT_BUCKETS; if (1 || dev->obj_bucket[bucket].count > 0) { - ylist_for_each(i, &dev->obj_bucket[bucket].list) { + list_for_each(i, &dev->obj_bucket[bucket].list) { /* If there is already one in the list */ - if (i && ylist_entry(i, yaffs_obj_t, - hash_link)->obj_id == n) { + if (i && list_entry(i, struct yaffs_obj, + hash_link)->obj_id == n) { found = 0; } } } } - return n; } -static void yaffs_hash_obj(yaffs_obj_t *in) +static void yaffs_hash_obj(struct yaffs_obj *in) { int bucket = yaffs_hash_fn(in->obj_id); - yaffs_dev_t *dev = in->my_dev; + struct yaffs_dev *dev = in->my_dev; - ylist_add(&in->hash_link, &dev->obj_bucket[bucket].list); + list_add(&in->hash_link, &dev->obj_bucket[bucket].list); dev->obj_bucket[bucket].count++; } -yaffs_obj_t *yaffs_find_by_number(yaffs_dev_t *dev, __u32 number) +struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number) { int bucket = yaffs_hash_fn(number); - struct ylist_head *i; - yaffs_obj_t *in; + struct list_head *i; + struct yaffs_obj *in; - ylist_for_each(i, &dev->obj_bucket[bucket].list) { + list_for_each(i, &dev->obj_bucket[bucket].list) { /* Look if it is in the list */ - if (i) { - in = ylist_entry(i, yaffs_obj_t, 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 in; - } + in = list_entry(i, struct yaffs_obj, hash_link); + if (in->obj_id == number) { + /* Don't show if it is defered free */ + if (in->defered_free) + return NULL; + return in; } } return NULL; } -yaffs_obj_t *yaffs_new_obj(yaffs_dev_t *dev, int number, - yaffs_obj_type type) +static struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number, + enum yaffs_obj_type type) { - yaffs_obj_t *theObject=NULL; - yaffs_tnode_t *tn = NULL; + struct yaffs_obj *the_obj = NULL; + struct yaffs_tnode *tn = NULL; if (number < 0) number = yaffs_new_obj_id(dev); @@ -1451,876 +1927,666 @@ yaffs_obj_t *yaffs_new_obj(yaffs_dev_t *dev, int number, return NULL; } - theObject = yaffs_alloc_empty_obj(dev); - if (!theObject){ - if(tn) - yaffs_free_tnode(dev,tn); + the_obj = yaffs_alloc_empty_obj(dev); + if (!the_obj) { + if (tn) + yaffs_free_tnode(dev, tn); return NULL; } + 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); - if (theObject) { - theObject->fake = 0; - theObject->rename_allowed = 1; - theObject->unlink_allowed = 1; - theObject->obj_id = number; - yaffs_hash_obj(theObject); - theObject->variant_type = type; -#ifdef CONFIG_YAFFS_WINCE - yfsd_win_file_time_now(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]; + switch (type) { + case YAFFS_OBJECT_TYPE_FILE: + the_obj->variant.file_variant.file_size = 0; + the_obj->variant.file_variant.scanned_size = 0; + the_obj->variant.file_variant.shrink_size = + yaffs_max_file_size(dev); + the_obj->variant.file_variant.top_level = 0; + the_obj->variant.file_variant.top = tn; + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + INIT_LIST_HEAD(&the_obj->variant.dir_variant.children); + INIT_LIST_HEAD(&the_obj->variant.dir_variant.dirty); + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + case YAFFS_OBJECT_TYPE_HARDLINK: + case YAFFS_OBJECT_TYPE_SPECIAL: + /* No action required */ + break; + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* todo this should not happen */ + break; + } + return the_obj; +} -#else +static struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev, + int number, u32 mode) +{ - theObject->yst_atime = theObject->yst_mtime = - theObject->yst_ctime = Y_CURRENT_TIME; -#endif - switch (type) { - case YAFFS_OBJECT_TYPE_FILE: - theObject->variant.file_variant.file_size = 0; - theObject->variant.file_variant.scanned_size = 0; - theObject->variant.file_variant.shrink_size = 0xFFFFFFFF; /* max __u32 */ - theObject->variant.file_variant.top_level = 0; - theObject->variant.file_variant.top = tn; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - YINIT_LIST_HEAD(&theObject->variant.dir_variant. - children); - YINIT_LIST_HEAD(&theObject->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; - } - } + struct yaffs_obj *obj = + yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); + + if (!obj) + return NULL; - return theObject; + obj->fake = 1; /* it is fake so it might not use NAND */ + obj->rename_allowed = 0; + obj->unlink_allowed = 0; + obj->deleted = 0; + obj->unlinked = 0; + obj->yst_mode = mode; + obj->my_dev = dev; + obj->hdr_chunk = 0; /* Not a valid chunk. */ + return obj; + +} + + +static void yaffs_init_tnodes_and_objs(struct yaffs_dev *dev) +{ + int i; + + dev->n_obj = 0; + dev->n_tnodes = 0; + 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; + } } -yaffs_obj_t *yaffs_find_or_create_by_number(yaffs_dev_t *dev, - int number, - yaffs_obj_type type) +struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev, + int number, + enum yaffs_obj_type type) { - yaffs_obj_t *theObject = NULL; + struct yaffs_obj *the_obj = NULL; if (number > 0) - theObject = yaffs_find_by_number(dev, number); + the_obj = yaffs_find_by_number(dev, number); - if (!theObject) - theObject = yaffs_new_obj(dev, number, type); + if (!the_obj) + the_obj = yaffs_new_obj(dev, number, type); - return theObject; + return the_obj; } - YCHAR *yaffs_clone_str(const YCHAR *str) { - YCHAR *newStr = NULL; + YCHAR *new_str = NULL; int len; if (!str) str = _Y(""); - len = yaffs_strnlen(str,YAFFS_MAX_ALIAS_LENGTH); - newStr = YMALLOC((len + 1) * sizeof(YCHAR)); - if (newStr){ - yaffs_strncpy(newStr, str,len); - newStr[len] = 0; + len = strnlen(str, YAFFS_MAX_ALIAS_LENGTH); + new_str = kmalloc((len + 1) * sizeof(YCHAR), GFP_NOFS); + if (new_str) { + strncpy(new_str, str, len); + new_str[len] = 0; } - return newStr; + return new_str; } +/* + *yaffs_update_parent() handles fixing a directories mtime and ctime when a new + * link (ie. name) is created or deleted in the directory. + * + * ie. + * create dir/a : update dir's mtime/ctime + * rm dir/a: update dir's mtime/ctime + * modify dir/a: don't update dir's mtimme/ctime + * + * This can be handled immediately or defered. Defering helps reduce the number + * of updates when many files in a directory are changed within a brief period. + * + * If the directory updating is defered then yaffs_update_dirty_dirs must be + * called periodically. + */ + +static void yaffs_update_parent(struct yaffs_obj *obj) +{ + struct yaffs_dev *dev; + + if (!obj) + return; + dev = obj->my_dev; + obj->dirty = 1; + yaffs_load_current_time(obj, 0, 1); + if (dev->param.defered_dir_update) { + struct list_head *link = &obj->variant.dir_variant.dirty; + + if (list_empty(link)) { + list_add(link, &dev->dirty_dirs); + yaffs_trace(YAFFS_TRACE_BACKGROUND, + "Added object %d to dirty directories", + obj->obj_id); + } + + } else { + yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); + } +} + +void yaffs_update_dirty_dirs(struct yaffs_dev *dev) +{ + struct list_head *link; + struct yaffs_obj *obj; + struct yaffs_dir_var *d_s; + union yaffs_obj_var *o_v; + + yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update dirty directories"); + + 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); + + yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update directory %d", + obj->obj_id); + + if (obj->dirty) + yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); + } +} /* * Mknod (create) a new object. * equiv_obj only has meaning for a hard link; - * aliasString only has meaning for a symlink. + * alias_str only has meaning for a symlink. * rdev only has meaning for devices (a subset of special objects) */ -static yaffs_obj_t *yaffs_create_obj(yaffs_obj_type type, - yaffs_obj_t *parent, - const YCHAR *name, - __u32 mode, - __u32 uid, - __u32 gid, - yaffs_obj_t *equiv_obj, - const YCHAR *aliasString, __u32 rdev) +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) { - yaffs_obj_t *in; + struct yaffs_obj *in; YCHAR *str = NULL; + struct yaffs_dev *dev = parent->my_dev; - yaffs_dev_t *dev = parent->my_dev; - - /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/ + /* 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(aliasString); + str = yaffs_clone_str(alias_str); if (!str) return NULL; } in = yaffs_new_obj(dev, -1, type); - if (!in){ - if(str) - YFREE(str); + if (!in) { + kfree(str); return NULL; } + in->hdr_chunk = 0; + in->valid = 1; + in->variant_type = type; + in->yst_mode = mode; + yaffs_attribs_init(in, gid, uid, rdev); + in->n_data_chunks = 0; - if (in) { - in->hdr_chunk = 0; - in->valid = 1; - in->variant_type = type; - - in->yst_mode = mode; - -#ifdef CONFIG_YAFFS_WINCE - yfsd_win_file_time_now(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->n_data_chunks = 0; - - yaffs_set_obj_name(in, name); - in->dirty = 1; + yaffs_set_obj_name(in, name); + in->dirty = 1; - yaffs_add_obj_to_dir(parent, in); + yaffs_add_obj_to_dir(parent, in); - in->my_dev = parent->my_dev; + in->my_dev = parent->my_dev; - 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; - ylist_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; - } + 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; + } - 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; - } + if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) { + /* Could not create the object header, fail */ + yaffs_del_obj(in); + in = NULL; + } + if (in) yaffs_update_parent(parent); - } return in; } -yaffs_obj_t *yaffs_create_file(yaffs_obj_t *parent, const YCHAR *name, - __u32 mode, __u32 uid, __u32 gid) +struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent, + const YCHAR *name, u32 mode, u32 uid, + u32 gid) { return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode, uid, gid, NULL, NULL, 0); } -yaffs_obj_t *yaffs_create_dir(yaffs_obj_t *parent, const YCHAR *name, - __u32 mode, __u32 uid, __u32 gid) +struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name, + u32 mode, u32 uid, u32 gid) { return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name, - mode, uid, gid, NULL, NULL, 0); + mode, uid, gid, NULL, NULL, 0); } -yaffs_obj_t *yaffs_create_special(yaffs_obj_t *parent, const YCHAR *name, - __u32 mode, __u32 uid, __u32 gid, __u32 rdev) +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); + uid, gid, NULL, NULL, rdev); } -yaffs_obj_t *yaffs_create_symlink(yaffs_obj_t *parent, const YCHAR *name, - __u32 mode, __u32 uid, __u32 gid, - const YCHAR *alias) +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); } /* yaffs_link_obj returns the object id of the equivalent object.*/ -yaffs_obj_t *yaffs_link_obj(yaffs_obj_t *parent, const YCHAR *name, - yaffs_obj_t *equiv_obj) +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 */ + /* Get the real object in case we were fed a hard link obj */ equiv_obj = yaffs_get_equivalent_obj(equiv_obj); - if (yaffs_create_obj - (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0, - equiv_obj, NULL, 0)) { + if (yaffs_create_obj(YAFFS_OBJECT_TYPE_HARDLINK, + parent, name, 0, 0, 0, + equiv_obj, NULL, 0)) return equiv_obj; - } else { - return NULL; - } - -} - -static int yaffs_change_obj_name(yaffs_obj_t *obj, yaffs_obj_t *new_dir, - const YCHAR *new_name, int force, int shadows) -{ - int unlinkOp; - int deleteOp; - - yaffs_obj_t *existingTarget; - - if (new_dir == NULL) - new_dir = obj->parent; /* use the old directory */ - - 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) - unlinkOp = (new_dir == obj->my_dev->unlinked_dir); - else - unlinkOp = (new_dir == obj->my_dev->unlinked_dir - && obj->variant_type == YAFFS_OBJECT_TYPE_FILE); - deleteOp = (new_dir == obj->my_dev->del_dir); - - existingTarget = yaffs_find_by_name(new_dir, new_name); - - /* 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) && - new_dir->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_set_obj_name(obj, new_name); - obj->dirty = 1; - - yaffs_add_obj_to_dir(new_dir, obj); - - if (unlinkOp) - obj->unlinked = 1; - - /* If it is a deletion then we mark it as a shrink for gc purposes. */ - if (yaffs_update_oh(obj, new_name, 0, deleteOp, shadows, NULL) >= 0) - return YAFFS_OK; - } + return NULL; - return YAFFS_FAIL; } -int yaffs_rename_obj(yaffs_obj_t *old_dir, const YCHAR *old_name, - yaffs_obj_t *new_dir, const YCHAR *new_name) -{ - yaffs_obj_t *obj = NULL; - yaffs_obj_t *existingTarget = NULL; - int force = 0; - int result; - yaffs_dev_t *dev; - if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) - YBUG(); - if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) - YBUG(); +/*---------------------- Block Management and Page Allocation -------------*/ - dev = old_dir->my_dev; - -#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 (old_dir == new_dir && yaffs_strcmp(old_name, new_name) == 0) - force = 1; -#endif - - if(yaffs_strnlen(new_name,YAFFS_MAX_NAME_LENGTH+1) > YAFFS_MAX_NAME_LENGTH) - /* ENAMETOOLONG */ - return YAFFS_FAIL; - - obj = yaffs_find_by_name(old_dir, old_name); - - if (obj && obj->rename_allowed) { - - /* Now do the handling for an existing target, if there is one */ +static void yaffs_deinit_blocks(struct yaffs_dev *dev) +{ + if (dev->block_info_alt && dev->block_info) + vfree(dev->block_info); + else + kfree(dev->block_info); - existingTarget = yaffs_find_by_name(new_dir, new_name); - if (existingTarget && - existingTarget->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY && - !ylist_empty(&existingTarget->variant.dir_variant.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->gc_disable=1; - yaffs_change_obj_name(obj, new_dir, new_name, force, - existingTarget->obj_id); - existingTarget->is_shadowed = 1; - yaffs_unlink_obj(existingTarget); - dev->gc_disable=0; - } + dev->block_info_alt = 0; - result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0); + dev->block_info = NULL; - yaffs_update_parent(old_dir); - if(new_dir != old_dir) - yaffs_update_parent(new_dir); - - return result; - } - return YAFFS_FAIL; + if (dev->chunk_bits_alt && dev->chunk_bits) + vfree(dev->chunk_bits); + else + kfree(dev->chunk_bits); + dev->chunk_bits_alt = 0; + dev->chunk_bits = NULL; } -/*------------------------- Block Management and Page Allocation ----------------*/ - -static int yaffs_init_blocks(yaffs_dev_t *dev) +static int yaffs_init_blocks(struct yaffs_dev *dev) { - int nBlocks = dev->internal_end_block - dev->internal_start_block + 1; + int n_blocks = dev->internal_end_block - dev->internal_start_block + 1; dev->block_info = NULL; dev->chunk_bits = NULL; - dev->alloc_block = -1; /* force it to get a new one */ /* If the first allocation strategy fails, thry the alternate one */ - dev->block_info = YMALLOC(nBlocks * sizeof(yaffs_block_info_t)); + dev->block_info = + kmalloc(n_blocks * sizeof(struct yaffs_block_info), GFP_NOFS); if (!dev->block_info) { - dev->block_info = YMALLOC_ALT(nBlocks * sizeof(yaffs_block_info_t)); + dev->block_info = + vmalloc(n_blocks * sizeof(struct yaffs_block_info)); dev->block_info_alt = 1; - } else + } else { dev->block_info_alt = 0; - - 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 * nBlocks); - if (!dev->chunk_bits) { - dev->chunk_bits = YMALLOC_ALT(dev->chunk_bit_stride * nBlocks); - dev->chunk_bits_alt = 1; - } else - dev->chunk_bits_alt = 0; } - if (dev->block_info && dev->chunk_bits) { - memset(dev->block_info, 0, nBlocks * sizeof(yaffs_block_info_t)); - memset(dev->chunk_bits, 0, dev->chunk_bit_stride * nBlocks); - return YAFFS_OK; - } - - return YAFFS_FAIL; -} + if (!dev->block_info) + goto alloc_error; -static void yaffs_deinit_blocks(yaffs_dev_t *dev) -{ - if (dev->block_info_alt && dev->block_info) - YFREE_ALT(dev->block_info); - else if (dev->block_info) - YFREE(dev->block_info); + /* Set up dynamic blockinfo stuff. Round up bytes. */ + dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8; + dev->chunk_bits = + kmalloc(dev->chunk_bit_stride * n_blocks, GFP_NOFS); + if (!dev->chunk_bits) { + dev->chunk_bits = + vmalloc(dev->chunk_bit_stride * n_blocks); + dev->chunk_bits_alt = 1; + } else { + dev->chunk_bits_alt = 0; + } + if (!dev->chunk_bits) + goto alloc_error; - dev->block_info_alt = 0; - dev->block_info = NULL; + 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; - 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; +alloc_error: + yaffs_deinit_blocks(dev); + return YAFFS_FAIL; } -void yaffs_block_became_dirty(yaffs_dev_t *dev, int block_no) -{ - yaffs_block_info_t *bi = yaffs_get_block_info(dev, block_no); - int erasedOk = 0; +void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no) +{ + struct yaffs_block_info *bi = yaffs_get_block_info(dev, block_no); + int erased_ok = 0; + int i; /* 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_block_became_dirty block %d state %d %s"TENDSTR), - block_no, bi->block_state, (bi->needs_retiring) ? "needs retiring" : "")); + yaffs_trace(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, + "yaffs_block_became_dirty block %d state %d %s", + block_no, bi->block_state, + (bi->needs_retiring) ? "needs retiring" : ""); - yaffs2_clear_oldest_dirty_seq(dev,bi); + yaffs2_clear_oldest_dirty_seq(dev, bi); bi->block_state = YAFFS_BLOCK_STATE_DIRTY; - /* If this is the block being garbage collected then stop gc'ing this block */ - if(block_no == dev->gc_block) + /* If this is the block being garbage collected then stop gc'ing */ + if (block_no == dev->gc_block) dev->gc_block = 0; - /* If this block is currently the best candidate for gc then drop as a candidate */ - if(block_no == dev->gc_dirtiest){ + /* 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); - erasedOk = yaffs_erase_block(dev, block_no); - if (!erasedOk) { + 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)); + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>> Erasure failed %d", block_no); } } - if (erasedOk && - ((yaffs_trace_mask & YAFFS_TRACE_ERASE) || !yaffs_skip_verification(dev))) { - int i; + /* Verify erasure if needed */ + if (erased_ok && + ((yaffs_trace_mask & YAFFS_TRACE_ERASE) || + !yaffs_skip_verification(dev))) { for (i = 0; i < dev->param.chunks_per_block; i++) { - if (!yaffs_check_chunk_erased - (dev, block_no * dev->param.chunks_per_block + i)) { - T(YAFFS_TRACE_ERROR, - (TSTR - (">>Block %d erasure supposedly OK, but chunk %d not erased" - TENDSTR), block_no, i)); + if (!yaffs_check_chunk_erased(dev, + block_no * dev->param.chunks_per_block + i)) { + yaffs_trace(YAFFS_TRACE_ERROR, + ">>Block %d erasure supposedly OK, but chunk %d not erased", + block_no, i); } } } - if (erasedOk) { - /* 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); - - 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 */ - + if (!erased_ok) { + /* We lost a block of free space */ + dev->n_free_chunks -= dev->param.chunks_per_block; yaffs_retire_block(dev, block_no); - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>> Block %d retired" TENDSTR), block_no)); - } -} - -static int yaffs_find_alloc_block(yaffs_dev_t *dev) -{ - int i; - - yaffs_block_info_t *bi; - - 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))); - - return -1; - } - - /* Find an empty block. */ - - 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; - } - - 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; - } + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>> Block %d retired", block_no); + return; } - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs tragedy: no more erased blocks, but there should have been %d" - TENDSTR), dev->n_erased_blocks)); - - return -1; -} - - -/* - * 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(yaffs_dev_t *dev, int n_chunks) -{ - int reservedChunks; - int reservedBlocks = dev->param.n_reserved_blocks; - int checkpointBlocks; - - checkpointBlocks = yaffs_calc_checkpt_blocks_required(dev); + /* Clean it up... */ + bi->block_state = YAFFS_BLOCK_STATE_EMPTY; + bi->seq_number = 0; + dev->n_erased_blocks++; + bi->pages_in_use = 0; + bi->soft_del_pages = 0; + bi->has_shrink_hdr = 0; + bi->skip_erased_check = 1; /* Clean, so no need to check */ + bi->gc_prioritise = 0; + bi->has_summary = 0; - reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->param.chunks_per_block); + yaffs_clear_chunk_bits(dev, block_no); - return (dev->n_free_chunks > (reservedChunks + n_chunks)); + yaffs_trace(YAFFS_TRACE_ERASE, "Erased block %d", block_no); } -static int yaffs_alloc_chunk(yaffs_dev_t *dev, int useReserve, - yaffs_block_info_t **blockUsedPtr) +static inline int yaffs_gc_process_chunk(struct yaffs_dev *dev, + struct yaffs_block_info *bi, + int old_chunk, u8 *buffer) { - int retVal; - yaffs_block_info_t *bi; + int new_chunk; + int mark_flash = 1; + struct yaffs_ext_tags tags; + struct yaffs_obj *object; + int matching_chunk; + int ret_val = YAFFS_OK; - if (dev->alloc_block < 0) { - /* Get next block to allocate off */ - dev->alloc_block = yaffs_find_alloc_block(dev); - dev->alloc_page = 0; - } + memset(&tags, 0, sizeof(tags)); + yaffs_rd_chunk_tags_nand(dev, old_chunk, + buffer, &tags); + object = yaffs_find_by_number(dev, tags.obj_id); - if (!useReserve && !yaffs_check_alloc_available(dev, 1)) { - /* Not enough space to allocate unless we're allowed to use the reserve. */ - return -1; - } - - if (dev->n_erased_blocks < dev->param.n_reserved_blocks - && dev->alloc_page == 0) { - T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR))); - } + yaffs_trace(YAFFS_TRACE_GC_DETAIL, + "Collecting chunk in block %d, %d %d %d ", + dev->gc_chunk, tags.obj_id, + tags.chunk_id, tags.n_bytes); - /* Next page please.... */ - if (dev->alloc_block >= 0) { - bi = yaffs_get_block_info(dev, dev->alloc_block); - - retVal = (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); - - dev->alloc_page++; + if (object && !yaffs_skip_verification(dev)) { + if (tags.chunk_id == 0) + matching_chunk = + object->hdr_chunk; + else if (object->soft_del) + /* Defeat the test */ + matching_chunk = old_chunk; + else + matching_chunk = + yaffs_find_chunk_in_file + (object, tags.chunk_id, + NULL); + + if (old_chunk != matching_chunk) + yaffs_trace(YAFFS_TRACE_ERROR, + "gc: page in gc mismatch: %d %d %d %d", + old_chunk, + matching_chunk, + tags.obj_id, + tags.chunk_id); + } + + if (!object) { + yaffs_trace(YAFFS_TRACE_ERROR, + "page %d in gc has no object: %d %d %d ", + old_chunk, + tags.obj_id, tags.chunk_id, + tags.n_bytes); + } + + 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. + */ + /* Free chunks already includes + * softdeleted chunks, how ever this + * chunk is going to soon be really + * deleted which will increment free + * chunks. We have to decrement free + * chunks so this works out properly. + */ dev->n_free_chunks--; + bi->soft_del_pages--; - /* If 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; + object->n_data_chunks--; + if (object->n_data_chunks <= 0) { + /* remeber to clean up obj */ + dev->gc_cleanup_list[dev->n_clean_ups] = tags.obj_id; + dev->n_clean_ups++; } + mark_flash = 0; + } else if (object) { + /* It's either a data chunk in a live + * file or an ObjectHeader, so we're + * interested in it. + * NB Need to keep the ObjectHeaders of + * deleted files until the whole file + * has been deleted off + */ + tags.serial_number++; + dev->n_gc_copies++; + + if (tags.chunk_id == 0) { + /* It is an object Id, + * We need to nuke the + * shrinkheader flags since its + * work is done. + * Also need to clean up + * shadowing. + */ + struct yaffs_obj_hdr *oh; + oh = (struct yaffs_obj_hdr *) buffer; + + 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) { + yaffs_oh_size_load(oh, + object->variant.file_variant.file_size); + tags.extra_file_size = + object->variant.file_variant.file_size; + } - if (blockUsedPtr) - *blockUsedPtr = bi; - - return retVal; - } - - T(YAFFS_TRACE_ERROR, - (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR))); - - return -1; -} - -static int yaffs_get_erased_chunks(yaffs_dev_t *dev) -{ - int n; - - n = dev->n_erased_blocks * dev->param.chunks_per_block; - - if (dev->alloc_block > 0) - n += (dev->param.chunks_per_block - dev->alloc_page); + 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); + } - return n; + if (new_chunk < 0) { + ret_val = YAFFS_FAIL; + } else { -} + /* Now fix up the Tnodes etc. */ -/* - * 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(yaffs_dev_t *dev) -{ - if(dev->alloc_block > 0){ - yaffs_block_info_t *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; + 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 */ + yaffs_put_chunk_in_file(object, tags.chunk_id, + new_chunk, 0); + } } } + if (ret_val == YAFFS_OK) + yaffs_chunk_del(dev, old_chunk, mark_flash, __LINE__); + return ret_val; } - -static int yaffs_gc_block(yaffs_dev_t *dev, int block, - int wholeBlock) +static int yaffs_gc_block(struct yaffs_dev *dev, int block, int whole_block) { - int oldChunk; - int newChunk; - int mark_flash; - int retVal = YAFFS_OK; + int old_chunk; + int ret_val = YAFFS_OK; int i; - int isCheckpointBlock; - int matchingChunk; - int maxCopies; - - int chunksBefore = yaffs_get_erased_chunks(dev); - int chunksAfter; + int is_checkpt_block; + int max_copies; + int chunks_before = yaffs_get_erased_chunks(dev); + int chunks_after; + struct yaffs_block_info *bi = yaffs_get_block_info(dev, block); - yaffs_ext_tags tags; + is_checkpt_block = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT); - yaffs_block_info_t *bi = yaffs_get_block_info(dev, block); - - yaffs_obj_t *object; - - isCheckpointBlock = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT); - - - T(YAFFS_TRACE_TRACING, - (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR), - block, - bi->pages_in_use, - bi->has_shrink_hdr, - wholeBlock)); + yaffs_trace(YAFFS_TRACE_TRACING, + "Collecting block %d, in use %d, shrink %d, whole_block %d", + block, bi->pages_in_use, bi->has_shrink_hdr, + whole_block); /*yaffs_verify_free_chunks(dev); */ - if(bi->block_state == YAFFS_BLOCK_STATE_FULL) + 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 */ dev->gc_disable = 1; - if (isCheckpointBlock || - !yaffs_still_some_chunks(dev, block)) { - T(YAFFS_TRACE_TRACING, - (TSTR - ("Collecting block %d that has no chunks in use" TENDSTR), - block)); + yaffs_summary_gc(dev, block); + + if (is_checkpt_block || !yaffs_still_some_chunks(dev, block)) { + yaffs_trace(YAFFS_TRACE_TRACING, + "Collecting block %d that has no chunks in use", + block); yaffs_block_became_dirty(dev, block); } else { - __u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__); + u8 *buffer = yaffs_get_temp_buffer(dev); yaffs_verify_blk(dev, bi, block); - maxCopies = (wholeBlock) ? dev->param.chunks_per_block : 5; - oldChunk = block * dev->param.chunks_per_block + dev->gc_chunk; + max_copies = (whole_block) ? dev->param.chunks_per_block : 5; + old_chunk = block * dev->param.chunks_per_block + dev->gc_chunk; - for (/* init already done */; - retVal == YAFFS_OK && + for (/* init already done */ ; + ret_val == YAFFS_OK && dev->gc_chunk < dev->param.chunks_per_block && (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) && - maxCopies > 0; - dev->gc_chunk++, oldChunk++) { + max_copies > 0; + dev->gc_chunk++, old_chunk++) { if (yaffs_check_chunk_bit(dev, block, dev->gc_chunk)) { - - /* This page is in use and might need to be copied off */ - - maxCopies--; - - mark_flash = 1; - - yaffs_init_tags(&tags); - - yaffs_rd_chunk_tags_nand(dev, oldChunk, - buffer, &tags); - - object = - yaffs_find_by_number(dev, - tags.obj_id); - - 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) - matchingChunk = object->hdr_chunk; - else if (object->soft_del) - matchingChunk = oldChunk; /* Defeat the test */ - else - matchingChunk = yaffs_find_chunk_in_file(object, tags.chunk_id, NULL); - - if (oldChunk != matchingChunk) - T(YAFFS_TRACE_ERROR, - (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR), - oldChunk, matchingChunk, tags.obj_id, tags.chunk_id)); - - } - - if (!object) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("page %d in gc has no object: %d %d %d " - TENDSTR), oldChunk, - tags.obj_id, tags.chunk_id, tags.n_bytes)); - } - - 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. - */ - - /* 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--; - - object->n_data_chunks--; - - 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); - - } else if (object) { - /* It's either a data chunk in a live file or - * an ObjectHeader, so we're interested in it. - * NB Need to keep the ObjectHeaders of deleted files - * until the whole file has been deleted off - */ - tags.serial_number++; - - dev->n_gc_copies++; - - if (tags.chunk_id == 0) { - /* It is an object Id, - * We need to nuke the shrinkheader flags first - * Also need to clean up shadowing. - * 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_obj_header *oh; - oh = (yaffs_obj_header *)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_verify_oh(object, oh, &tags, 1); - newChunk = - yaffs_write_new_chunk(dev,(__u8 *) oh, &tags, 1); - } else - newChunk = - yaffs_write_new_chunk(dev, buffer, &tags, 1); - - if (newChunk < 0) { - retVal = YAFFS_FAIL; - } else { - - /* Ok, now fix up the Tnodes etc. */ - - if (tags.chunk_id == 0) { - /* It's a header */ - object->hdr_chunk = newChunk; - object->serial = tags.serial_number; - } else { - /* It's a data chunk */ - int ok; - ok = yaffs_put_chunk_in_file - (object, - tags.chunk_id, - newChunk, 0); - } - } - } - - if (retVal == YAFFS_OK) - yaffs_chunk_del(dev, oldChunk, mark_flash, __LINE__); - + /* Page is in use and might need to be copied */ + max_copies--; + ret_val = yaffs_gc_process_chunk(dev, bi, + old_chunk, buffer); } } - - yaffs_release_temp_buffer(dev, buffer, __LINE__); - - - + yaffs_release_temp_buffer(dev, buffer); } yaffs_verify_collected_blk(dev, bi, block); - - if (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { /* * The gc did not complete. Set block state back to FULL @@ -2332,32 +2598,25 @@ static int yaffs_gc_block(yaffs_dev_t *dev, int block, /* 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]); + struct yaffs_obj *object = + yaffs_find_by_number(dev, dev->gc_cleanup_list[i]); if (object) { yaffs_free_tnode(dev, - object->variant.file_variant. - top); + object->variant.file_variant.top); object->variant.file_variant.top = NULL; - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: About to finally delete object %d" - TENDSTR), object->obj_id)); + yaffs_trace(YAFFS_TRACE_GC, + "yaffs: About to finally delete object %d", + object->obj_id); yaffs_generic_obj_del(object); object->my_dev->n_deleted_files--; } } - - - chunksAfter = yaffs_get_erased_chunks(dev); - if (chunksBefore >= chunksAfter) { - T(YAFFS_TRACE_GC, - (TSTR - ("gc did not increase free chunks before %d after %d" - TENDSTR), chunksBefore, chunksAfter)); - } + chunks_after = yaffs_get_erased_chunks(dev); + if (chunks_before >= chunks_after) + yaffs_trace(YAFFS_TRACE_GC, + "gc did not increase free chunks before %d after %d", + chunks_before, chunks_after); dev->gc_block = 0; dev->gc_chunk = 0; dev->n_clean_ups = 0; @@ -2365,24 +2624,23 @@ static int yaffs_gc_block(yaffs_dev_t *dev, int block, dev->gc_disable = 0; - return retVal; + return ret_val; } /* - * FindBlockForgarbageCollection is used to select the dirtiest block (or close enough) + * find_gc_block() selects the dirtiest block (or close enough) * for garbage collection. */ -static unsigned yaffs_find_gc_block(yaffs_dev_t *dev, - int aggressive, - int background) +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 prioritisedExists = 0; - yaffs_block_info_t *bi; + int prioritised_exist = 0; + struct yaffs_block_info *bi; int threshold; /* First let's see if we need to grab a prioritised block */ @@ -2390,13 +2648,12 @@ static unsigned yaffs_find_gc_block(yaffs_dev_t *dev, dev->gc_dirtiest = 0; bi = dev->block_info; for (i = dev->internal_start_block; - i <= dev->internal_end_block && !selected; - i++) { + i <= dev->internal_end_block && !selected; i++) { if (bi->gc_prioritise) { - prioritisedExists = 1; + prioritised_exist = 1; if (bi->block_state == YAFFS_BLOCK_STATE_FULL && - yaffs_block_ok_for_gc(dev, bi)) { + yaffs_block_ok_for_gc(dev, bi)) { selected = i; prioritised = 1; } @@ -2406,124 +2663,125 @@ static unsigned yaffs_find_gc_block(yaffs_dev_t *dev, /* * 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. + * this happened because there is at least one old dirty block + * gumming up the works. Let's gc the oldest dirty block. */ - if(prioritisedExists && - !selected && - dev->oldest_dirty_block > 0) + if (prioritised_exist && + !selected && dev->oldest_dirty_block > 0) selected = dev->oldest_dirty_block; - if (!prioritisedExists) /* None found, so we can clear this */ + 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 + /* If we're doing aggressive GC then we are happy to take a less-dirty + * block, and search harder. + * else (leasurely gc), then we only bother to do this if the * block has only a few pages in use. */ - if (!selected){ - int pagesUsed; - int nBlocks = dev->internal_end_block - dev->internal_start_block + 1; - if (aggressive){ + 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 = nBlocks; + iterations = n_blocks; } else { - int maxThreshold; + int max_threshold; - if(background) - maxThreshold = dev->param.chunks_per_block/2; + if (background) + max_threshold = dev->param.chunks_per_block / 2; else - maxThreshold = dev->param.chunks_per_block/8; + max_threshold = dev->param.chunks_per_block / 8; - if(maxThreshold < YAFFS_GC_PASSIVE_THRESHOLD) - maxThreshold = YAFFS_GC_PASSIVE_THRESHOLD; + if (max_threshold < YAFFS_GC_PASSIVE_THRESHOLD) + max_threshold = YAFFS_GC_PASSIVE_THRESHOLD; - threshold = background ? - (dev->gc_not_done + 2) * 2 : 0; - if(threshold <YAFFS_GC_PASSIVE_THRESHOLD) + threshold = background ? (dev->gc_not_done + 2) * 2 : 0; + if (threshold < YAFFS_GC_PASSIVE_THRESHOLD) threshold = YAFFS_GC_PASSIVE_THRESHOLD; - if(threshold > maxThreshold) - threshold = maxThreshold; + if (threshold > max_threshold) + threshold = max_threshold; - iterations = nBlocks / 16 + 1; + iterations = n_blocks / 16 + 1; if (iterations > 100) iterations = 100; } for (i = 0; - i < iterations && - (dev->gc_dirtiest < 1 || - dev->gc_pages_in_use > YAFFS_GC_GOOD_ENOUGH); - i++) { + 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; + 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); - pagesUsed = bi->pages_in_use - bi->soft_del_pages; + pages_used = bi->pages_in_use - bi->soft_del_pages; if (bi->block_state == YAFFS_BLOCK_STATE_FULL && - pagesUsed < dev->param.chunks_per_block && - (dev->gc_dirtiest < 1 || pagesUsed < dev->gc_pages_in_use) && - yaffs_block_ok_for_gc(dev, bi)) { + 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 = pagesUsed; + dev->gc_pages_in_use = pages_used; } } - if(dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold) + 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 + * If nothing has been selected for a while, try the oldest dirty * because that's gumming up the works. */ - if(!selected && dev->param.is_yaffs2 && - dev->gc_not_done >= ( background ? 10 : 20)){ + 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) { + 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_pages_in_use = + bi->pages_in_use - bi->soft_del_pages; + } else { dev->gc_not_done = 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)); + if (selected) { + yaffs_trace(YAFFS_TRACE_GC, + "GC Selected block %d with %d free, prioritised:%d", + selected, + dev->param.chunks_per_block - dev->gc_pages_in_use, + prioritised); dev->n_gc_blocks++; - if(background) + 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) + if (dev->refresh_skip > 0) dev->refresh_skip--; - } else{ + } 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" : "")); + yaffs_trace(YAFFS_TRACE_GC, + "GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s", + dev->gc_block_finder, dev->gc_not_done, threshold, + dev->gc_dirtiest, dev->gc_pages_in_use, + dev->oldest_dirty_block, background ? " bg" : ""); } return selected; @@ -2533,53 +2791,54 @@ static unsigned yaffs_find_gc_block(yaffs_dev_t *dev, * 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. + * Passive gc only inspects smaller areas and only accepts 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(yaffs_dev_t *dev, int background) +static int yaffs_check_gc(struct yaffs_dev *dev, int background) { int aggressive = 0; - int gcOk = YAFFS_OK; - int maxTries = 0; - int minErased; - int erasedChunks; - int checkpointBlockAdjust; - - if(dev->param.gc_control && - (dev->param.gc_control(dev) & 1) == 0) + int gc_ok = YAFFS_OK; + int max_tries = 0; + int min_erased; + int erased_chunks; + int checkpt_block_adjust; + + if (dev->param.gc_control_fn && + (dev->param.gc_control_fn(dev) & 1) == 0) return YAFFS_OK; - if (dev->gc_disable) { + 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. + * Only loops here if the collection does not increase space. */ do { - maxTries++; + max_tries++; - checkpointBlockAdjust = yaffs_calc_checkpt_blocks_required(dev); + checkpt_block_adjust = yaffs_calc_checkpt_blocks_required(dev); - minErased = dev->param.n_reserved_blocks + checkpointBlockAdjust + 1; - erasedChunks = dev->n_erased_blocks * dev->param.chunks_per_block; + 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 < minErased) + /* If we need a block soon then do aggressive gc. */ + if (dev->n_erased_blocks < min_erased) aggressive = 1; else { - if(!background && erasedChunks > (dev->n_free_chunks / 4)) + if (!background + && erased_chunks > (dev->n_free_chunks / 4)) break; - if(dev->gc_skip > 20) + if (dev->gc_skip > 20) dev->gc_skip = 20; - if(erasedChunks < dev->n_free_chunks/2 || - dev->gc_skip < 1 || - background) + if (erased_chunks < dev->n_free_chunks / 2 || + dev->gc_skip < 1 || background) aggressive = 0; else { dev->gc_skip--; @@ -2589,17 +2848,19 @@ static int yaffs_check_gc(yaffs_dev_t *dev, int background) dev->gc_skip = 5; - /* If we don't already have a block being gc'd then see if we should start another */ + /* 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; + dev->n_clean_ups = 0; } if (dev->gc_block < 1) { - dev->gc_block = yaffs_find_gc_block(dev, aggressive, background); + dev->gc_block = + yaffs_find_gc_block(dev, aggressive, background); dev->gc_chunk = 0; - dev->n_clean_ups=0; + dev->n_clean_ups = 0; } if (dev->gc_block > 0) { @@ -2607,25 +2868,24 @@ static int yaffs_check_gc(yaffs_dev_t *dev, int background) if (!aggressive) dev->passive_gc_count++; - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR), - dev->n_erased_blocks, aggressive)); + yaffs_trace(YAFFS_TRACE_GC, + "yaffs: GC n_erased_blocks %d aggressive %d", + dev->n_erased_blocks, aggressive); - gcOk = yaffs_gc_block(dev, dev->gc_block, aggressive); + gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive); } - if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) && dev->gc_block > 0) { - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d" - TENDSTR), dev->n_erased_blocks, maxTries, dev->gc_block)); + if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) && + dev->gc_block > 0) { + yaffs_trace(YAFFS_TRACE_GC, + "yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d", + dev->n_erased_blocks, max_tries, + dev->gc_block); } } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) && - (dev->gc_block > 0) && - (maxTries < 2)); + (dev->gc_block > 0) && (max_tries < 2)); - return aggressive ? gcOk : YAFFS_OK; + return aggressive ? gc_ok : YAFFS_OK; } /* @@ -2633,222 +2893,19 @@ static int yaffs_check_gc(yaffs_dev_t *dev, int background) * 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(yaffs_dev_t *dev, unsigned urgency) +int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency) { - int erasedChunks = dev->n_erased_blocks * dev->param.chunks_per_block; + int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block; - T(YAFFS_TRACE_BACKGROUND, (TSTR("Background gc %u" TENDSTR),urgency)); + yaffs_trace(YAFFS_TRACE_BACKGROUND, "Background gc %u", urgency); yaffs_check_gc(dev, 1); - return erasedChunks > dev->n_free_chunks/2; -} - -/*------------------------- TAGS --------------------------------*/ - -static int yaffs_tags_match(const yaffs_ext_tags *tags, int obj_id, - int chunkInObject) -{ - return (tags->chunk_id == chunkInObject && - tags->obj_id == obj_id && !tags->is_deleted) ? 1 : 0; - + return erased_chunks > dev->n_free_chunks / 2; } - /*-------------------- Data file manipulation -----------------*/ -static int yaffs_find_chunk_in_file(yaffs_obj_t *in, int inode_chunk, - yaffs_ext_tags *tags) -{ - /*Get the Tnode, then get the level 0 offset chunk offset */ - yaffs_tnode_t *tn; - int theChunk = -1; - yaffs_ext_tags localTags; - int retVal = -1; - - yaffs_dev_t *dev = in->my_dev; - - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &localTags; - } - - tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); - - if (tn) { - theChunk = yaffs_get_group_base(dev, tn, inode_chunk); - - retVal = - yaffs_find_chunk_in_group(dev, theChunk, tags, in->obj_id, - inode_chunk); - } - return retVal; -} - -static int yaffs_find_del_file_chunk(yaffs_obj_t *in, int inode_chunk, - yaffs_ext_tags *tags) -{ - /* Get the Tnode, then get the level 0 offset chunk offset */ - yaffs_tnode_t *tn; - int theChunk = -1; - yaffs_ext_tags localTags; - - yaffs_dev_t *dev = in->my_dev; - int retVal = -1; - - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &localTags; - } - - tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); - - if (tn) { - - theChunk = yaffs_get_group_base(dev, tn, inode_chunk); - - retVal = - yaffs_find_chunk_in_group(dev, theChunk, tags, in->obj_id, - inode_chunk); - - /* Delete the entry in the filestructure (if found) */ - if (retVal != -1) - yaffs_load_tnode_0(dev, tn, inode_chunk, 0); - } - - return retVal; -} - - -int yaffs_put_chunk_in_file(yaffs_obj_t *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. - */ - - yaffs_tnode_t *tn; - yaffs_dev_t *dev = in->my_dev; - int existingChunk; - yaffs_ext_tags existingTags; - yaffs_ext_tags newTags; - unsigned existingSerial, newSerial; - - 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_chunk_del(dev, nand_chunk, 1, __LINE__); - return YAFFS_OK; - } - - tn = yaffs_add_find_tnode_0(dev, - &in->variant.file_variant, - inode_chunk, - NULL); - if (!tn) - return YAFFS_FAIL; - - if(!nand_chunk) - /* Dummy insert, bail now */ - return YAFFS_OK; - - existingChunk = 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. - */ - - if (existingChunk > 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 (in_scan > 0) { - /* Only do this for forward scanning */ - yaffs_rd_chunk_tags_nand(dev, - nand_chunk, - NULL, &newTags); - - /* Do a proper find */ - existingChunk = - yaffs_find_chunk_in_file(in, inode_chunk, - &existingTags); - } - - if (existingChunk <= 0) { - /*Hoosterman - how did this happen? */ - - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: existing chunk < 0 in scan" - TENDSTR))); - - } - - /* NB The deleted flags should be false, otherwise the chunks will - * not be loaded during a scan - */ - - if (in_scan > 0) { - newSerial = newTags.serial_number; - existingSerial = existingTags.serial_number; - } - - if ((in_scan > 0) && - (existingChunk <= 0 || - ((existingSerial + 1) & 3) == newSerial)) { - /* Forward scanning. - * Use new - * Delete the old one and drop through to update the tnode - */ - yaffs_chunk_del(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_chunk_del(dev, nand_chunk, 1, - __LINE__); - return YAFFS_OK; - } - } - - } - - if (existingChunk == 0) - in->n_data_chunks++; - - yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk); - - return YAFFS_OK; -} - -static int yaffs_rd_data_obj(yaffs_obj_t *in, int inode_chunk, - __u8 *buffer) +static int yaffs_rd_data_obj(struct yaffs_obj *in, int inode_chunk, u8 * buffer) { int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL); @@ -2856,9 +2913,9 @@ static int yaffs_rd_data_obj(yaffs_obj_t *in, int inode_chunk, 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)); + yaffs_trace(YAFFS_TRACE_NANDACCESS, + "Chunk %d not found zero instead", + nand_chunk); /* get sane (zero) data if you read a hole */ memset(buffer, 0, in->my_dev->data_bytes_per_chunk); return 0; @@ -2866,12 +2923,13 @@ static int yaffs_rd_data_obj(yaffs_obj_t *in, int inode_chunk, } -void yaffs_chunk_del(yaffs_dev_t *dev, int chunk_id, int mark_flash, int lyn) +void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash, + int lyn) { int block; int page; - yaffs_ext_tags tags; - yaffs_block_info_t *bi; + struct yaffs_ext_tags tags; + struct yaffs_block_info *bi; if (chunk_id <= 0) return; @@ -2880,26 +2938,23 @@ void yaffs_chunk_del(yaffs_dev_t *dev, int chunk_id, int mark_flash, int lyn) 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_trace(YAFFS_TRACE_VERIFY, + "Deleting invalid chunk %d", chunk_id); bi = yaffs_get_block_info(dev, block); - + yaffs2_update_oldest_dirty_seq(dev, block, bi); - T(YAFFS_TRACE_DELETION, - (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunk_id)); + yaffs_trace(YAFFS_TRACE_DELETION, + "line %d delete of chunk %d", + lyn, chunk_id); if (!dev->param.is_yaffs2 && mark_flash && bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) { - yaffs_init_tags(&tags); - + memset(&tags, 0, sizeof(tags)); tags.is_deleted = 1; - yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags); yaffs_handle_chunk_update(dev, chunk_id, &tags); } else { @@ -2911,519 +2966,449 @@ void yaffs_chunk_del(yaffs_dev_t *dev, int chunk_id, int mark_flash, int lyn) */ 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_NEEDS_SCAN || bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { dev->n_free_chunks++; - yaffs_clear_chunk_bit(dev, block, page); - bi->pages_in_use--; 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) { + bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCAN) { yaffs_block_became_dirty(dev, block); } - } - } -static int yaffs_wr_data_obj(yaffs_obj_t *in, int inode_chunk, - const __u8 *buffer, int n_bytes, - int useReserve) +static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, + const u8 *buffer, int n_bytes, int use_reserve) { /* Find old chunk Need to do this to get serial number * Write new one and patch into tree. * Invalidate old tags. */ - int prevChunkId; - yaffs_ext_tags prevTags; - - int newChunkId; - yaffs_ext_tags newTags; + int prev_chunk_id; + struct yaffs_ext_tags prev_tags; + int new_chunk_id; + struct yaffs_ext_tags new_tags; + struct yaffs_dev *dev = in->my_dev; - yaffs_dev_t *dev = in->my_dev; - - yaffs_check_gc(dev,0); + 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. */ - prevChunkId = yaffs_find_chunk_in_file(in, inode_chunk, &prevTags); - if(prevChunkId < 1 && - !yaffs_put_chunk_in_file(in, inode_chunk, 0, 0)) + 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; /* Set up new tags */ - yaffs_init_tags(&newTags); + memset(&new_tags, 0, sizeof(new_tags)); - newTags.chunk_id = inode_chunk; - newTags.obj_id = in->obj_id; - newTags.serial_number = - (prevChunkId > 0) ? prevTags.serial_number + 1 : 1; - newTags.n_bytes = n_bytes; + 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(); + yaffs_trace(YAFFS_TRACE_ERROR, + "Writing %d bytes to chunk!!!!!!!!!", + n_bytes); + BUG(); } - - - newChunkId = - yaffs_write_new_chunk(dev, buffer, &newTags, - useReserve); - if (newChunkId > 0) { - yaffs_put_chunk_in_file(in, inode_chunk, newChunkId, 0); + new_chunk_id = + yaffs_write_new_chunk(dev, buffer, &new_tags, use_reserve); + + if (new_chunk_id > 0) { + yaffs_put_chunk_in_file(in, inode_chunk, new_chunk_id, 0); - if (prevChunkId > 0) - yaffs_chunk_del(dev, prevChunkId, 1, __LINE__); + if (prev_chunk_id > 0) + yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__); yaffs_verify_file_sane(in); } - return newChunkId; + return new_chunk_id; } -/* UpdateObjectHeader updates the header on NAND for an object. - * If name is not NULL, then that new name is used. - */ -int yaffs_update_oh(yaffs_obj_t *in, const YCHAR *name, int force, - int is_shrink, int shadows, yaffs_xattr_mod *xmod) -{ - - yaffs_block_info_t *bi; - - yaffs_dev_t *dev = in->my_dev; - - int prevChunkId; - int retVal = 0; - int result = 0; - - int newChunkId; - yaffs_ext_tags newTags; - yaffs_ext_tags oldTags; - const YCHAR *alias = NULL; - - __u8 *buffer = NULL; - YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1]; - - yaffs_obj_header *oh = NULL; - yaffs_strcpy(old_name, _Y("silly old name")); +static int yaffs_do_xattrib_mod(struct yaffs_obj *obj, int set, + const YCHAR *name, const void *value, int size, + int flags) +{ + struct yaffs_xattr_mod xmod; + int result; - 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); + xmod.set = set; + xmod.name = name; + xmod.data = value; + xmod.size = size; + xmod.flags = flags; + xmod.result = -ENOSPC; - buffer = yaffs_get_temp_buffer(in->my_dev, __LINE__); - oh = (yaffs_obj_header *) buffer; + result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod); - prevChunkId = in->hdr_chunk; + if (result > 0) + return xmod.result; + else + return -ENOSPC; +} - if (prevChunkId > 0) { - result = yaffs_rd_chunk_tags_nand(dev, prevChunkId, - buffer, &oldTags); +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); - yaffs_verify_oh(in, oh, &oldTags, 0); + obj->has_xattr = nval_hasvalues(x_buffer, x_size); + obj->xattr_known = 1; + xmod->result = retval; - memcpy(old_name, oh->name, sizeof(oh->name)); - memset(buffer, 0xFF, sizeof(yaffs_obj_header)); - } else - memset(buffer, 0xFF, dev->data_bytes_per_chunk); + return retval; +} - oh->type = in->variant_type; - oh->yst_mode = in->yst_mode; - oh->shadows_obj = oh->inband_shadowed_obj_id = shadows; +static int yaffs_do_xattrib_fetch(struct yaffs_obj *obj, const YCHAR *name, + void *value, int size) +{ + char *buffer = NULL; + int result; + struct yaffs_ext_tags tags; + struct yaffs_dev *dev = obj->my_dev; + int x_offs = sizeof(struct yaffs_obj_hdr); + int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr); + char *x_buffer; + int retval = 0; -#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->parent_obj_id = in->parent->obj_id; - else - oh->parent_obj_id = 0; + if (obj->hdr_chunk < 1) + return -ENODATA; - if (name && *name) { - memset(oh->name, 0, sizeof(oh->name)); - yaffs_load_oh_from_name(dev,oh->name,name); - } else if (prevChunkId > 0) - memcpy(oh->name, old_name, sizeof(oh->name)); + /* 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 - memset(oh->name, 0, sizeof(oh->name)); - - 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; - } + return 0; + } - /* process any xattrib modifications */ - if(xmod) - yaffs_apply_xattrib_mod(in, (char *)buffer, xmod); + buffer = (char *)yaffs_get_temp_buffer(dev); + if (!buffer) + return -ENOMEM; + result = + yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, (u8 *) buffer, &tags); - /* Tags */ - yaffs_init_tags(&newTags); - in->serial++; - newTags.chunk_id = 0; - newTags.obj_id = in->obj_id; - newTags.serial_number = in->serial; + if (result != YAFFS_OK) + retval = -ENOENT; + else { + x_buffer = buffer + x_offs; - /* Add extra info for file header */ + if (!obj->xattr_known) { + obj->has_xattr = nval_hasvalues(x_buffer, x_size); + obj->xattr_known = 1; + } - newTags.extra_available = 1; - newTags.extra_parent_id = oh->parent_obj_id; - newTags.extra_length = oh->file_size; - newTags.extra_is_shrink = oh->is_shrink; - newTags.extra_equiv_id = oh->equiv_id; - newTags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0; - newTags.extra_obj_type = in->variant_type; + if (name) + retval = nval_get(x_buffer, x_size, name, value, size); + else + retval = nval_list(x_buffer, x_size, value, size); + } + yaffs_release_temp_buffer(dev, (u8 *) buffer); + return retval; +} - yaffs_verify_oh(in, oh, &newTags, 1); +int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name, + const void *value, int size, int flags) +{ + return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags); +} - /* Create new chunk in NAND */ - newChunkId = - yaffs_write_new_chunk(dev, buffer, &newTags, - (prevChunkId > 0) ? 1 : 0); +int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name) +{ + return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0); +} - if (newChunkId >= 0) { +int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value, + int size) +{ + return yaffs_do_xattrib_fetch(obj, name, value, size); +} - in->hdr_chunk = newChunkId; +int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size) +{ + return yaffs_do_xattrib_fetch(obj, NULL, buffer, size); +} - if (prevChunkId > 0) { - yaffs_chunk_del(dev, prevChunkId, 1, - __LINE__); - } +static void yaffs_check_obj_details_loaded(struct yaffs_obj *in) +{ + u8 *buf; + struct yaffs_obj_hdr *oh; + struct yaffs_dev *dev; + struct yaffs_ext_tags tags; + int result; + int alloc_failed = 0; - if (!yaffs_obj_cache_dirty(in)) - in->dirty = 0; + if (!in || !in->lazy_loaded || in->hdr_chunk < 1) + return; - /* 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, - newChunkId / in->my_dev->param.chunks_per_block); - bi->has_shrink_hdr = 1; - } + dev = in->my_dev; + in->lazy_loaded = 0; + buf = yaffs_get_temp_buffer(dev); - } + result = yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, buf, &tags); + oh = (struct yaffs_obj_hdr *)buf; - retVal = newChunkId; + 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 */ } - - if (buffer) - yaffs_release_temp_buffer(dev, buffer, __LINE__); - - return retVal; + yaffs_release_temp_buffer(dev, buf); } -/*------------------------ 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_obj_cache_dirty(yaffs_obj_t *obj) +static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR *name, + const YCHAR *oh_name, int buff_size) { - yaffs_dev_t *dev = obj->my_dev; - int i; - yaffs_cache_t *cache; - int nCaches = obj->my_dev->param.n_caches; - - for (i = 0; i < nCaches; i++) { - cache = &dev->cache[i]; - if (cache->object == obj && - cache->dirty) - return 1; +#ifdef CONFIG_YAFFS_AUTO_UNICODE + if (dev->param.auto_unicode) { + if (*oh_name) { + /* It is an ASCII name, do an ASCII to + * unicode conversion */ + const char *ascii_oh_name = (const char *)oh_name; + int n = buff_size - 1; + while (n > 0 && *ascii_oh_name) { + *name = *ascii_oh_name; + name++; + ascii_oh_name++; + n--; + } + } else { + strncpy(name, oh_name + 1, buff_size - 1); + } + } else { +#else + (void) dev; + { +#endif + strncpy(name, oh_name, buff_size - 1); } - - return 0; } - -static void yaffs_flush_file_cache(yaffs_obj_t *obj) +static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR *oh_name, + const YCHAR *name) { - yaffs_dev_t *dev = obj->my_dev; - int lowest = -99; /* Stop compiler whining. */ - int i; - yaffs_cache_t *cache; - int chunkWritten = 0; - int nCaches = obj->my_dev->param.n_caches; - - 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->cache[i].object == obj && - dev->cache[i].dirty) { - if (!cache - || dev->cache[i].chunk_id < - lowest) { - cache = &dev->cache[i]; - lowest = cache->chunk_id; - } - } - } +#ifdef CONFIG_YAFFS_AUTO_UNICODE - if (cache && !cache->locked) { - /* Write it out and free it up */ - - chunkWritten = - yaffs_wr_data_obj(cache->object, - cache->chunk_id, - cache->data, - cache->n_bytes, - 1); - cache->dirty = 0; - cache->object = NULL; - } + int is_ascii; + YCHAR *w; - } while (cache && chunkWritten > 0); + if (dev->param.auto_unicode) { - if (cache) { - /* Hoosterman, disk full while writing cache out. */ - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs tragedy: no space during cache write" TENDSTR))); + 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++; } - } - -} - -/*yaffs_flush_whole_cache(dev) - * - * - */ - -void yaffs_flush_whole_cache(yaffs_dev_t *dev) -{ - yaffs_obj_t *obj; - int nCaches = dev->param.n_caches; - 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->cache[i].object && - dev->cache[i].dirty) - obj = dev->cache[i].object; + if (is_ascii) { + /* It is an ASCII name, so convert unicode to ascii */ + char *ascii_oh_name = (char *)oh_name; + int n = YAFFS_MAX_NAME_LENGTH - 1; + while (n > 0 && *name) { + *ascii_oh_name = *name; + name++; + ascii_oh_name++; + n--; + } + } else { + /* Unicode name, so save starting at the second YCHAR */ + *oh_name = 0; + strncpy(oh_name + 1, name, YAFFS_MAX_NAME_LENGTH - 2); } - if (obj) - yaffs_flush_file_cache(obj); - - } while (obj); - + } else { +#else + dev = dev; + { +#endif + strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1); + } } - -/* 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. +/* UpdateObjectHeader updates the header on NAND for an object. + * If name is not NULL, then that new name is used. */ -static yaffs_cache_t *yaffs_grab_chunk_worker(yaffs_dev_t *dev) +int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, int force, + int is_shrink, int shadows, struct yaffs_xattr_mod *xmod) { - int i; - if (dev->param.n_caches > 0) { - for (i = 0; i < dev->param.n_caches; i++) { - if (!dev->cache[i].object) - return &dev->cache[i]; - } - } + struct yaffs_block_info *bi; + struct yaffs_dev *dev = in->my_dev; + int prev_chunk_id; + int ret_val = 0; + int result = 0; + int new_chunk_id; + struct yaffs_ext_tags new_tags; + struct yaffs_ext_tags old_tags; + const YCHAR *alias = NULL; + u8 *buffer = NULL; + YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1]; + struct yaffs_obj_hdr *oh = NULL; + loff_t file_size = 0; - return NULL; -} + strcpy(old_name, _Y("silly old name")); -static yaffs_cache_t *yaffs_grab_chunk_cache(yaffs_dev_t *dev) -{ - yaffs_cache_t *cache; - yaffs_obj_t *theObj; - int usage; - int i; - int pushout; + if (in->fake && in != dev->root_dir && !force && !xmod) + return ret_val; - if (dev->param.n_caches > 0) { - /* Try find a non-dirty one... */ + yaffs_check_gc(dev, 0); + yaffs_check_obj_details_loaded(in); - cache = yaffs_grab_chunk_worker(dev); + buffer = yaffs_get_temp_buffer(in->my_dev); + oh = (struct yaffs_obj_hdr *)buffer; - 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. - */ + prev_chunk_id = in->hdr_chunk; - /* With locking we can't assume we can use entry zero */ + if (prev_chunk_id > 0) { + result = yaffs_rd_chunk_tags_nand(dev, prev_chunk_id, + buffer, &old_tags); - theObj = NULL; - usage = -1; - cache = NULL; - pushout = -1; + yaffs_verify_oh(in, oh, &old_tags, 0); + memcpy(old_name, oh->name, sizeof(oh->name)); + memset(buffer, 0xff, sizeof(struct yaffs_obj_hdr)); + } else { + memset(buffer, 0xff, dev->data_bytes_per_chunk); + } - 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; - theObj = dev->cache[i].object; - cache = &dev->cache[i]; - pushout = i; - } - } + oh->type = in->variant_type; + oh->yst_mode = in->yst_mode; + oh->shadows_obj = oh->inband_shadowed_obj_id = shadows; - if (!cache || cache->dirty) { - /* Flush and try again */ - yaffs_flush_file_cache(theObj); - cache = yaffs_grab_chunk_worker(dev); - } + yaffs_load_attribs_oh(oh, in); - } - return cache; - } else - return NULL; + if (in->parent) + oh->parent_obj_id = in->parent->obj_id; + else + oh->parent_obj_id = 0; -} + 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)); + } -/* Find a cached chunk */ -static yaffs_cache_t *yaffs_find_chunk_cache(const yaffs_obj_t *obj, - int chunk_id) -{ - yaffs_dev_t *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++; + oh->is_shrink = is_shrink; - return &dev->cache[i]; - } - } + switch (in->variant_type) { + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* Should not happen */ + break; + case YAFFS_OBJECT_TYPE_FILE: + if (oh->parent_obj_id != YAFFS_OBJECTID_DELETED && + oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED) + file_size = in->variant.file_variant.file_size; + yaffs_oh_size_load(oh, file_size); + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + oh->equiv_id = in->variant.hardlink_variant.equiv_id; + break; + case YAFFS_OBJECT_TYPE_SPECIAL: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + alias = in->variant.symlink_variant.alias; + if (!alias) + alias = _Y("no alias"); + strncpy(oh->alias, alias, YAFFS_MAX_ALIAS_LENGTH); + oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; + break; } - return NULL; -} -/* Mark the chunk for the least recently used algorithym */ -static void yaffs_use_cache(yaffs_dev_t *dev, yaffs_cache_t *cache, - int isAWrite) -{ + /* process any xattrib modifications */ + if (xmod) + yaffs_apply_xattrib_mod(in, (char *)buffer, xmod); + + /* Tags */ + memset(&new_tags, 0, sizeof(new_tags)); + in->serial++; + new_tags.chunk_id = 0; + new_tags.obj_id = in->obj_id; + new_tags.serial_number = in->serial; + + /* Add extra info for file header */ + new_tags.extra_available = 1; + new_tags.extra_parent_id = oh->parent_obj_id; + new_tags.extra_file_size = file_size; + new_tags.extra_is_shrink = oh->is_shrink; + new_tags.extra_equiv_id = oh->equiv_id; + new_tags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0; + new_tags.extra_obj_type = in->variant_type; + yaffs_verify_oh(in, oh, &new_tags, 1); + + /* Create new chunk in NAND */ + new_chunk_id = + yaffs_write_new_chunk(dev, buffer, &new_tags, + (prev_chunk_id > 0) ? 1 : 0); - 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; + if (buffer) + yaffs_release_temp_buffer(dev, buffer); - dev->cache_last_use = 0; - } + if (new_chunk_id < 0) + return new_chunk_id; - dev->cache_last_use++; + in->hdr_chunk = new_chunk_id; - cache->last_use = dev->cache_last_use; + if (prev_chunk_id > 0) + yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__); - if (isAWrite) - cache->dirty = 1; - } -} + if (!yaffs_obj_cache_dirty(in)) + in->dirty = 0; -/* Invalidate a single cache page. - * Do this when a whole page gets written, - * ie the short cache for this page is no longer valid. - */ -static void yaffs_invalidate_chunk_cache(yaffs_obj_t *object, int chunk_id) -{ - if (object->my_dev->param.n_caches > 0) { - yaffs_cache_t *cache = yaffs_find_chunk_cache(object, chunk_id); - - if (cache) - cache->object = NULL; + /* 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; } -} -/* Invalidate all the cache pages associated with this object - * Do this whenever ther file is deleted or resized. - */ -static void yaffs_invalidate_whole_cache(yaffs_obj_t *in) -{ - int i; - yaffs_dev_t *dev = in->my_dev; - 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; - } - } + return new_chunk_id; } - /*--------------------- File read/write ------------------------ * Read and write have very similar structures. * In general the read/write has three parts to it @@ -3434,24 +3419,19 @@ static void yaffs_invalidate_whole_cache(yaffs_obj_t *in) * Curve-balls: the first chunk might also be the last chunk. */ -int yaffs_file_rd(yaffs_obj_t *in, __u8 *buffer, loff_t offset, - int n_bytes) +int yaffs_file_rd(struct yaffs_obj *in, u8 * buffer, loff_t offset, int n_bytes) { - int chunk; - __u32 start; - int nToCopy; + u32 start; + int n_copy; int n = n_bytes; - int nDone = 0; - yaffs_cache_t *cache; - - yaffs_dev_t *dev; + int n_done = 0; + struct yaffs_cache *cache; + struct yaffs_dev *dev; dev = in->my_dev; 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++; @@ -3459,30 +3439,32 @@ int yaffs_file_rd(yaffs_obj_t *in, __u8 *buffer, loff_t offset, * the same chunk. */ if ((start + n) < dev->data_bytes_per_chunk) - nToCopy = n; + n_copy = n; else - nToCopy = dev->data_bytes_per_chunk - start; + n_copy = dev->data_bytes_per_chunk - start; cache = yaffs_find_chunk_cache(in, chunk); - /* 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 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->data_bytes_per_chunk || dev->param.inband_tags) { + if (cache || n_copy != dev->data_bytes_per_chunk || + dev->param.inband_tags) { if (dev->param.n_caches > 0) { - /* If we can't find the data in the cache, then load it up. */ + /* If we can't find the data in the cache, + * then load it up. */ if (!cache) { - cache = yaffs_grab_chunk_cache(in->my_dev); + 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->data); cache->n_bytes = 0; } @@ -3490,294 +3472,287 @@ int yaffs_file_rd(yaffs_obj_t *in, __u8 *buffer, loff_t offset, cache->locked = 1; - - memcpy(buffer, &cache->data[start], nToCopy); + memcpy(buffer, &cache->data[start], n_copy); cache->locked = 0; } else { - /* Read into the local buffer then copy..*/ - - __u8 *localBuffer = - yaffs_get_temp_buffer(dev, __LINE__); - yaffs_rd_data_obj(in, chunk, - localBuffer); + /* Read into the local buffer then copy.. */ - memcpy(buffer, &localBuffer[start], nToCopy); + u8 *local_buffer = + yaffs_get_temp_buffer(dev); + yaffs_rd_data_obj(in, chunk, local_buffer); + memcpy(buffer, &local_buffer[start], n_copy); - yaffs_release_temp_buffer(dev, localBuffer, - __LINE__); + yaffs_release_temp_buffer(dev, local_buffer); } - } else { - - /* A full chunk. Read directly into the supplied buffer. */ + /* A full chunk. Read directly into the buffer. */ yaffs_rd_data_obj(in, chunk, buffer); - } - - n -= nToCopy; - offset += nToCopy; - buffer += nToCopy; - nDone += nToCopy; - + n -= n_copy; + offset += n_copy; + buffer += n_copy; + n_done += n_copy; } - - return nDone; + return n_done; } -int yaffs_do_file_wr(yaffs_obj_t *in, const __u8 *buffer, loff_t offset, - int n_bytes, int write_trhrough) +int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset, + int n_bytes, int write_through) { int chunk; - __u32 start; - int nToCopy; + u32 start; + int n_copy; int n = n_bytes; - int nDone = 0; - int nToWriteBack; - int startOfWrite = offset; - int chunkWritten = 0; - __u32 n_bytesRead; - __u32 chunkStart; - - yaffs_dev_t *dev; + int n_done = 0; + int n_writeback; + loff_t start_write = offset; + int chunk_written = 0; + u32 n_bytes_read; + loff_t chunk_start; + struct yaffs_dev *dev; dev = in->my_dev; - while (n > 0 && chunkWritten >= 0) { + while (n > 0 && chunk_written >= 0) { yaffs_addr_to_chunk(dev, offset, &chunk, &start); - 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)); + if (((loff_t)chunk) * + dev->data_bytes_per_chunk + start != offset || + start >= dev->data_bytes_per_chunk) { + yaffs_trace(YAFFS_TRACE_ERROR, + "AddrToChunk of offset %lld gives chunk %d start %d", + offset, chunk, start); } - chunk++; /* File pos to chunk in file offset */ + chunk++; /* File pos to chunk in file offset */ /* OK now check for the curveball where the start and end are in * the same chunk. */ if ((start + n) < dev->data_bytes_per_chunk) { - nToCopy = n; + n_copy = n; - /* Now folks, to calculate how many bytes to write back.... - * If we're overwriting and not writing to then end of file then - * we need to write back as much as was there before. + /* Now calculate how many bytes to write back.... + * If we're overwriting and not writing to then end of + * file then we need to write back as much as was there + * before. */ - chunkStart = ((chunk - 1) * dev->data_bytes_per_chunk); + chunk_start = (((loff_t)(chunk - 1)) * + dev->data_bytes_per_chunk); - if (chunkStart > in->variant.file_variant.file_size) - n_bytesRead = 0; /* Past end of file */ + if (chunk_start > in->variant.file_variant.file_size) + n_bytes_read = 0; /* Past end of file */ else - n_bytesRead = in->variant.file_variant.file_size - chunkStart; + n_bytes_read = + in->variant.file_variant.file_size - + chunk_start; - if (n_bytesRead > dev->data_bytes_per_chunk) - n_bytesRead = dev->data_bytes_per_chunk; + if (n_bytes_read > dev->data_bytes_per_chunk) + n_bytes_read = dev->data_bytes_per_chunk; - nToWriteBack = - (n_bytesRead > - (start + n)) ? n_bytesRead : (start + n); + n_writeback = + (n_bytes_read > + (start + n)) ? n_bytes_read : (start + n); - if (nToWriteBack < 0 || nToWriteBack > dev->data_bytes_per_chunk) - YBUG(); + if (n_writeback < 0 || + n_writeback > dev->data_bytes_per_chunk) + BUG(); } else { - nToCopy = dev->data_bytes_per_chunk - start; - nToWriteBack = dev->data_bytes_per_chunk; + n_copy = dev->data_bytes_per_chunk - start; + n_writeback = dev->data_bytes_per_chunk; } - if (nToCopy != 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 (n_copy != dev->data_bytes_per_chunk || + !dev->param.cache_bypass_aligned || + dev->param.inband_tags) { + /* An incomplete start or end chunk (or maybe both + * start and end chunk), or we're using inband tags, + * or we're forcing writes through the cache, + * so we want to use the cache buffers. */ if (dev->param.n_caches > 0) { - yaffs_cache_t *cache; - /* If we can't find the data in the cache, then load the cache */ + struct yaffs_cache *cache; + + /* If we can't find the data in the cache, then + * load the cache */ cache = yaffs_find_chunk_cache(in, chunk); - if (!cache - && yaffs_check_alloc_available(dev, 1)) { + 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); + 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->dirty && + !yaffs_check_alloc_available(dev, + 1)) { + /* Drop the cache if it was a read cache + * item and no space check has been made + * for it. */ - cache = NULL; + cache = NULL; } if (cache) { yaffs_use_cache(dev, cache, 1); cache->locked = 1; - memcpy(&cache->data[start], buffer, - nToCopy); - + n_copy); cache->locked = 0; - cache->n_bytes = nToWriteBack; + cache->n_bytes = n_writeback; - if (write_trhrough) { - chunkWritten = + if (write_through) { + chunk_written = yaffs_wr_data_obj (cache->object, cache->chunk_id, - cache->data, cache->n_bytes, - 1); + cache->data, + cache->n_bytes, 1); cache->dirty = 0; } - } else { - chunkWritten = -1; /* fail the write */ + chunk_written = -1; /* fail write */ } } else { - /* An incomplete start or end chunk (or maybe both start and end chunk) - * Read into the local buffer then copy, then copy over and write back. + /* An incomplete start or end chunk (or maybe + * both start and end chunk). Read into the + * local buffer then copy over and write back. */ - __u8 *localBuffer = - yaffs_get_temp_buffer(dev, __LINE__); + u8 *local_buffer = yaffs_get_temp_buffer(dev); - yaffs_rd_data_obj(in, chunk, - localBuffer); + yaffs_rd_data_obj(in, chunk, local_buffer); + memcpy(&local_buffer[start], buffer, n_copy); - - - memcpy(&localBuffer[start], buffer, nToCopy); - - chunkWritten = + chunk_written = yaffs_wr_data_obj(in, chunk, - localBuffer, - nToWriteBack, - 0); - - yaffs_release_temp_buffer(dev, localBuffer, - __LINE__); + local_buffer, + n_writeback, 0); + yaffs_release_temp_buffer(dev, local_buffer); } - } else { - /* A full chunk. Write directly from the supplied buffer. */ - + /* A full chunk. Write directly from the buffer. */ - - chunkWritten = + chunk_written = yaffs_wr_data_obj(in, chunk, buffer, - dev->data_bytes_per_chunk, - 0); + dev->data_bytes_per_chunk, 0); - /* Since we've overwritten the cached data, we better invalidate it. */ + /* Since we've overwritten the cached data, + * we better invalidate it. */ yaffs_invalidate_chunk_cache(in, chunk); } - if (chunkWritten >= 0) { - n -= nToCopy; - offset += nToCopy; - buffer += nToCopy; - nDone += nToCopy; + if (chunk_written >= 0) { + n -= n_copy; + offset += n_copy; + buffer += n_copy; + n_done += n_copy; } - } /* Update file object */ - if ((startOfWrite + nDone) > in->variant.file_variant.file_size) - in->variant.file_variant.file_size = (startOfWrite + nDone); + if ((start_write + n_done) > in->variant.file_variant.file_size) + in->variant.file_variant.file_size = (start_write + n_done); in->dirty = 1; - - return nDone; + return n_done; } -int yaffs_wr_file(yaffs_obj_t *in, const __u8 *buffer, loff_t offset, - int n_bytes, int write_trhrough) +int yaffs_wr_file(struct yaffs_obj *in, const u8 *buffer, loff_t offset, + int n_bytes, int write_through) { - yaffs2_handle_hole(in,offset); - return yaffs_do_file_wr(in,buffer,offset,n_bytes,write_trhrough); + yaffs2_handle_hole(in, offset); + return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_through); } - - /* ---------------------- File resizing stuff ------------------ */ -static void yaffs_prune_chunks(yaffs_obj_t *in, int new_size) +static void yaffs_prune_chunks(struct yaffs_obj *in, loff_t new_size) { - yaffs_dev_t *dev = in->my_dev; - int oldFileSize = in->variant.file_variant.file_size; - - int lastDel = 1 + (oldFileSize - 1) / dev->data_bytes_per_chunk; - - int startDel = 1 + (new_size + dev->data_bytes_per_chunk - 1) / - dev->data_bytes_per_chunk; + struct yaffs_dev *dev = in->my_dev; + loff_t old_size = in->variant.file_variant.file_size; int i; int chunk_id; + u32 dummy; + int last_del; + int start_del; + + if (old_size > 0) + yaffs_addr_to_chunk(dev, old_size - 1, &last_del, &dummy); + else + last_del = 0; + + yaffs_addr_to_chunk(dev, new_size + dev->data_bytes_per_chunk - 1, + &start_del, &dummy); + last_del++; + start_del++; /* Delete backwards so that we don't end up with holes if * power is lost part-way through the operation. */ - for (i = lastDel; i >= startDel; i--) { + for (i = last_del; i >= start_del; i--) { /* NB this could be optimised somewhat, * eg. could retrieve the tags and write them without * using yaffs_chunk_del */ 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("Found daft chunk_id %d for %d" TENDSTR), - chunk_id, i)); - } else { - in->n_data_chunks--; - yaffs_chunk_del(dev, chunk_id, 1, __LINE__); - } + + if (chunk_id < 1) + continue; + + if (chunk_id < + (dev->internal_start_block * dev->param.chunks_per_block) || + chunk_id >= + ((dev->internal_end_block + 1) * + dev->param.chunks_per_block)) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Found daft chunk_id %d for %d", + chunk_id, i); + } else { + in->n_data_chunks--; + yaffs_chunk_del(dev, chunk_id, 1, __LINE__); } } - } - -void yaffs_resize_file_down( yaffs_obj_t *obj, loff_t new_size) +void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size) { - int newFullChunks; - __u32 new_sizeOfPartialChunk; - yaffs_dev_t *dev = obj->my_dev; + int new_full; + u32 new_partial; + struct yaffs_dev *dev = obj->my_dev; - yaffs_addr_to_chunk(dev, new_size, &newFullChunks, &new_sizeOfPartialChunk); + yaffs_addr_to_chunk(dev, new_size, &new_full, &new_partial); yaffs_prune_chunks(obj, new_size); - if (new_sizeOfPartialChunk != 0) { - int lastChunk = 1 + newFullChunks; - __u8 *localBuffer = yaffs_get_temp_buffer(dev, __LINE__); + if (new_partial != 0) { + int last_chunk = 1 + new_full; + u8 *local_buffer = yaffs_get_temp_buffer(dev); - /* Got to read and rewrite the last chunk with its new size and zero pad */ - yaffs_rd_data_obj(obj, lastChunk, localBuffer); - memset(localBuffer + new_sizeOfPartialChunk, 0, - dev->data_bytes_per_chunk - new_sizeOfPartialChunk); + /* Rewrite the last chunk with its new size and zero pad */ + yaffs_rd_data_obj(obj, last_chunk, local_buffer); + memset(local_buffer + new_partial, 0, + dev->data_bytes_per_chunk - new_partial); - yaffs_wr_data_obj(obj, lastChunk, localBuffer, - new_sizeOfPartialChunk, 1); + yaffs_wr_data_obj(obj, last_chunk, local_buffer, + new_partial, 1); - yaffs_release_temp_buffer(dev, localBuffer, __LINE__); + yaffs_release_temp_buffer(dev, local_buffer); } obj->variant.file_variant.file_size = new_size; @@ -3785,30 +3760,29 @@ void yaffs_resize_file_down( yaffs_obj_t *obj, loff_t new_size) yaffs_prune_tree(dev, &obj->variant.file_variant); } - -int yaffs_resize_file(yaffs_obj_t *in, loff_t new_size) +int yaffs_resize_file(struct yaffs_obj *in, loff_t new_size) { - yaffs_dev_t *dev = in->my_dev; - int oldFileSize = in->variant.file_variant.file_size; + struct yaffs_dev *dev = in->my_dev; + loff_t old_size = in->variant.file_variant.file_size; yaffs_flush_file_cache(in); yaffs_invalidate_whole_cache(in); - yaffs_check_gc(dev,0); + yaffs_check_gc(dev, 0); if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) return YAFFS_FAIL; - if (new_size == oldFileSize) + if (new_size == old_size) return YAFFS_OK; - - if(new_size > oldFileSize){ - yaffs2_handle_hole(in,new_size); + + if (new_size > old_size) { + yaffs2_handle_hole(in, new_size); in->variant.file_variant.file_size = new_size; } else { - /* new_size < oldFileSize */ + /* new_size < old_size */ yaffs_resize_file_down(in, new_size); - } + } /* Write a new object header to reflect the resize. * show we've shrunk the file, if need be @@ -3821,121 +3795,65 @@ int yaffs_resize_file(yaffs_obj_t *in, loff_t new_size) in->parent->obj_id != YAFFS_OBJECTID_DELETED) yaffs_update_oh(in, NULL, 0, 0, 0, NULL); - return YAFFS_OK; } -loff_t yaffs_get_file_size(yaffs_obj_t *obj) -{ - YCHAR *alias = NULL; - obj = yaffs_get_equivalent_obj(obj); - - switch (obj->variant_type) { - case YAFFS_OBJECT_TYPE_FILE: - return obj->variant.file_variant.file_size; - case YAFFS_OBJECT_TYPE_SYMLINK: - alias = obj->variant.symlink_variant.alias; - if(!alias) - return 0; - return yaffs_strnlen(alias,YAFFS_MAX_ALIAS_LENGTH); - default: - return 0; - } -} - - - -int yaffs_flush_file(yaffs_obj_t *in, int update_time, int data_sync) +int yaffs_flush_file(struct yaffs_obj *in, int update_time, int data_sync) { - int retVal; - if (in->dirty) { - yaffs_flush_file_cache(in); - if(data_sync) /* Only sync data */ - retVal=YAFFS_OK; - else { - if (update_time) { -#ifdef CONFIG_YAFFS_WINCE - yfsd_win_file_time_now(in->win_mtime); -#else - - in->yst_mtime = Y_CURRENT_TIME; + if (!in->dirty) + return YAFFS_OK; -#endif - } + yaffs_flush_file_cache(in); - retVal = (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >= - 0) ? YAFFS_OK : YAFFS_FAIL; - } - } else { - retVal = YAFFS_OK; - } + if (data_sync) + return YAFFS_OK; - return retVal; + if (update_time) + yaffs_load_current_time(in, 0, 0); + return (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >= 0) ? + YAFFS_OK : YAFFS_FAIL; } -static int yaffs_generic_obj_del(yaffs_obj_t *in) -{ - - /* 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_remove_obj_from_dir(in); - yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__); - in->hdr_chunk = 0; - - yaffs_free_obj(in); - return YAFFS_OK; - -} /* 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(yaffs_obj_t *in) +static int yaffs_unlink_file_if_needed(struct yaffs_obj *in) { - - int retVal; - int immediateDeletion = 0; - yaffs_dev_t *dev = in->my_dev; + int ret_val; + int del_now = 0; + struct yaffs_dev *dev = in->my_dev; if (!in->my_inode) - immediateDeletion = 1; + del_now = 1; - if (immediateDeletion) { - retVal = + 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)); + _Y("deleted"), 0, 0); + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: immediate deletion of file %d", + in->obj_id); in->deleted = 1; in->my_dev->n_deleted_files++; if (dev->param.disable_soft_del || dev->param.is_yaffs2) yaffs_resize_file(in, 0); yaffs_soft_del_file(in); } else { - retVal = + ret_val = yaffs_change_obj_name(in, in->my_dev->unlinked_dir, - _Y("unlinked"), 0, 0); + _Y("unlinked"), 0, 0); } - - - return retVal; + return ret_val; } -int yaffs_del_file(yaffs_obj_t *in) +static int yaffs_del_file(struct yaffs_obj *in) { - int retVal = YAFFS_OK; - int deleted; /* Need to cache value on stack if in is freed */ - yaffs_dev_t *dev = in->my_dev; + 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 (dev->param.disable_soft_del || dev->param.is_yaffs2) yaffs_resize_file(in, 0); @@ -3945,11 +3863,11 @@ int yaffs_del_file(yaffs_obj_t *in) * That won't be the case if it has been resized to zero. */ if (!in->unlinked) - retVal = yaffs_unlink_file_if_needed(in); + ret_val = yaffs_unlink_file_if_needed(in); deleted = in->deleted; - if (retVal == YAFFS_OK && in->unlinked && !in->deleted) { + if (ret_val == YAFFS_OK && in->unlinked && !in->deleted) { in->deleted = 1; deleted = 1; in->my_dev->n_deleted_files++; @@ -3966,13 +3884,14 @@ int yaffs_del_file(yaffs_obj_t *in) } } -static int yaffs_is_non_empty_dir(yaffs_obj_t *obj) +int yaffs_is_non_empty_dir(struct yaffs_obj *obj) { - return (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) && - !(ylist_empty(&obj->variant.dir_variant.children)); + return (obj && + obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) && + !(list_empty(&obj->variant.dir_variant.children)); } -static int yaffs_del_dir(yaffs_obj_t *obj) +static int yaffs_del_dir(struct yaffs_obj *obj) { /* First check that the directory is empty. */ if (yaffs_is_non_empty_dir(obj)) @@ -3981,69 +3900,71 @@ static int yaffs_del_dir(yaffs_obj_t *obj) return yaffs_generic_obj_del(obj); } -static int yaffs_del_symlink(yaffs_obj_t *in) +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; + kfree(in->variant.symlink_variant.alias); + in->variant.symlink_variant.alias = NULL; return yaffs_generic_obj_del(in); } -static int yaffs_del_link(yaffs_obj_t *in) +static int yaffs_del_link(struct yaffs_obj *in) { - /* remove this hardlink from the list assocaited with the equivalent + /* remove this hardlink from the list associated with the equivalent * object */ - ylist_del_init(&in->hard_links); + list_del_init(&in->hard_links); return yaffs_generic_obj_del(in); } -int yaffs_del_obj(yaffs_obj_t *obj) +int yaffs_del_obj(struct yaffs_obj *obj) { -int retVal = -1; + int ret_val = -1; + switch (obj->variant_type) { case YAFFS_OBJECT_TYPE_FILE: - retVal = yaffs_del_file(obj); + ret_val = yaffs_del_file(obj); break; case YAFFS_OBJECT_TYPE_DIRECTORY: - if(!ylist_empty(&obj->variant.dir_variant.dirty)){ - T(YAFFS_TRACE_BACKGROUND, (TSTR("Remove object %d from dirty directories" TENDSTR),obj->obj_id)); - ylist_del_init(&obj->variant.dir_variant.dirty); + if (!list_empty(&obj->variant.dir_variant.dirty)) { + yaffs_trace(YAFFS_TRACE_BACKGROUND, + "Remove object %d from dirty directories", + obj->obj_id); + list_del_init(&obj->variant.dir_variant.dirty); } return yaffs_del_dir(obj); break; case YAFFS_OBJECT_TYPE_SYMLINK: - retVal = yaffs_del_symlink(obj); + ret_val = yaffs_del_symlink(obj); break; case YAFFS_OBJECT_TYPE_HARDLINK: - retVal = yaffs_del_link(obj); + ret_val = yaffs_del_link(obj); break; case YAFFS_OBJECT_TYPE_SPECIAL: - retVal = yaffs_generic_obj_del(obj); + ret_val = yaffs_generic_obj_del(obj); break; case YAFFS_OBJECT_TYPE_UNKNOWN: - retVal = 0; + ret_val = 0; break; /* should not happen. */ } - - return retVal; + return ret_val; } -static int yaffs_unlink_worker(yaffs_obj_t *obj) +static int yaffs_unlink_worker(struct yaffs_obj *obj) { + int del_now = 0; - int immediateDeletion = 0; + if (!obj) + return YAFFS_FAIL; if (!obj->my_inode) - immediateDeletion = 1; + del_now = 1; - if(obj) - yaffs_update_parent(obj->parent); + yaffs_update_parent(obj->parent); if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { return yaffs_del_link(obj); - } else if (!ylist_empty(&obj->hard_links)) { + } 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 @@ -4053,39 +3974,40 @@ static int yaffs_unlink_worker(yaffs_obj_t *obj) * 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) + * - Move it from its parent directory so that the rename works. * - Rename the object to the hardlink's name. * - Delete the hardlink */ - yaffs_obj_t *hl; - yaffs_obj_t *parent; - int retVal; + struct yaffs_obj *hl; + struct yaffs_obj *parent; + int ret_val; YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; - hl = ylist_entry(obj->hard_links.next, yaffs_obj_t, hard_links); + hl = list_entry(obj->hard_links.next, struct yaffs_obj, + hard_links); yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1); parent = hl->parent; - ylist_del_init(&hl->hard_links); + list_del_init(&hl->hard_links); - yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl); + yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl); - retVal = yaffs_change_obj_name(obj,parent, name, 0, 0); + ret_val = yaffs_change_obj_name(obj, parent, name, 0, 0); - if (retVal == YAFFS_OK) - retVal = yaffs_generic_obj_del(hl); + if (ret_val == YAFFS_OK) + ret_val = yaffs_generic_obj_del(hl); - return retVal; + return ret_val; - } else if (immediateDeletion) { + } else if (del_now) { switch (obj->variant_type) { case YAFFS_OBJECT_TYPE_FILE: return yaffs_del_file(obj); break; case YAFFS_OBJECT_TYPE_DIRECTORY: - ylist_del_init(&obj->variant.dir_variant.dirty); + list_del_init(&obj->variant.dir_variant.dirty); return yaffs_del_dir(obj); break; case YAFFS_OBJECT_TYPE_SYMLINK: @@ -4099,126 +4021,187 @@ static int yaffs_unlink_worker(yaffs_obj_t *obj) default: return YAFFS_FAIL; } - } else if(yaffs_is_non_empty_dir(obj)) + } else if (yaffs_is_non_empty_dir(obj)) { return YAFFS_FAIL; - else + } else { return yaffs_change_obj_name(obj, obj->my_dev->unlinked_dir, - _Y("unlinked"), 0, 0); + _Y("unlinked"), 0, 0); + } } - -static int yaffs_unlink_obj(yaffs_obj_t *obj) +static int yaffs_unlink_obj(struct yaffs_obj *obj) { - if (obj && obj->unlink_allowed) return yaffs_unlink_worker(obj); return YAFFS_FAIL; - } -int yaffs_unlinker(yaffs_obj_t *dir, const YCHAR *name) + +int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR *name) { - yaffs_obj_t *obj; + struct yaffs_obj *obj; obj = yaffs_find_by_name(dir, name); return yaffs_unlink_obj(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; + + if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + BUG(); + return YAFFS_FAIL; + } + if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + BUG(); + return YAFFS_FAIL; + } + + dev = old_dir->my_dev; + +#ifdef CONFIG_YAFFS_CASE_INSENSITIVE + /* Special case for case insemsitive systems. + * While look-up is case insensitive, the name isn't. + * Therefore we might want to change x.txt to X.txt + */ + if (old_dir == new_dir && + old_name && new_name && + strcmp(old_name, new_name) == 0) + force = 1; +#endif + + if (strnlen(new_name, YAFFS_MAX_NAME_LENGTH + 1) > + YAFFS_MAX_NAME_LENGTH) + /* ENAMETOOLONG */ + return YAFFS_FAIL; + + if (old_name) + obj = yaffs_find_by_name(old_dir, old_name); + else{ + obj = old_dir; + old_dir = obj->parent; + } + + if (obj && obj->rename_allowed) { + /* Now handle an existing target, if there is one */ + existing_target = yaffs_find_by_name(new_dir, new_name); + if (yaffs_is_non_empty_dir(existing_target)) { + return YAFFS_FAIL; /* ENOTEMPTY */ + } else if (existing_target && existing_target != obj) { + /* Nuke the target first, using shadowing, + * but only if it isn't the same object. + * + * Note we must disable gc here otherwise it can mess + * up the shadowing. + * + */ + dev->gc_disable = 1; + yaffs_change_obj_name(obj, new_dir, new_name, force, + existing_target->obj_id); + existing_target->is_shadowed = 1; + yaffs_unlink_obj(existing_target); + dev->gc_disable = 0; + } + + result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0); + + yaffs_update_parent(old_dir); + if (new_dir != old_dir) + yaffs_update_parent(new_dir); + + return result; + } + return YAFFS_FAIL; +} + /*----------------------- Initialisation Scanning ---------------------- */ -void yaffs_handle_shadowed_obj(yaffs_dev_t *dev, int obj_id, - int backward_scanning) +void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id, + int backward_scanning) { - yaffs_obj_t *obj; + struct yaffs_obj *obj; - if (!backward_scanning) { - /* Handle YAFFS1 forward scanning case - * For YAFFS1 we always do the deletion - */ - - } else { + if (backward_scanning) { /* Handle YAFFS2 case (backward scanning) * If the shadowed object exists then ignore. */ obj = yaffs_find_by_number(dev, obj_id); - if(obj) + if (obj) return; } - /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc. + /* Let's create it (if it does not exist) assuming it is a file so that + * it can do shrinking etc. * We put it in unlinked dir to be cleaned up after the scanning */ obj = - yaffs_find_or_create_by_number(dev, obj_id, - YAFFS_OBJECT_TYPE_FILE); + yaffs_find_or_create_by_number(dev, obj_id, YAFFS_OBJECT_TYPE_FILE); if (!obj) return; obj->is_shadowed = 1; yaffs_add_obj_to_dir(dev->unlinked_dir, obj); obj->variant.file_variant.shrink_size = 0; - obj->valid = 1; /* So that we don't read any other info for this file */ - + obj->valid = 1; /* So that we don't read any other info. */ } - -void yaffs_link_fixup(yaffs_dev_t *dev, yaffs_obj_t *hard_list) +void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list) { - yaffs_obj_t *hl; - yaffs_obj_t *in; - - while (hard_list) { - hl = hard_list; - hard_list = (yaffs_obj_t *) (hard_list->hard_links.next); + struct list_head *lh; + struct list_head *save; + struct yaffs_obj *hl; + struct yaffs_obj *in; + list_for_each_safe(lh, save, hard_list) { + hl = list_entry(lh, struct yaffs_obj, hard_links); in = yaffs_find_by_number(dev, - hl->variant.hardlink_variant. - equiv_id); + hl->variant.hardlink_variant.equiv_id); if (in) { /* Add the hardlink pointers */ hl->variant.hardlink_variant.equiv_obj = in; - ylist_add(&hl->hard_links, &in->hard_links); + 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; - YINIT_LIST_HEAD(&hl->hard_links); - + INIT_LIST_HEAD(&hl->hard_links); } } } - -static void yaffs_strip_deleted_objs(yaffs_dev_t *dev) +static void yaffs_strip_deleted_objs(struct yaffs_dev *dev) { /* - * Sort out state of unlinked and deleted objects after scanning. - */ - struct ylist_head *i; - struct ylist_head *n; - yaffs_obj_t *l; + * Sort out state of unlinked and deleted objects after scanning. + */ + struct list_head *i; + struct list_head *n; + struct yaffs_obj *l; if (dev->read_only) return; /* Soft delete all the unlinked files */ - ylist_for_each_safe(i, n, - &dev->unlinked_dir->variant.dir_variant.children) { - if (i) { - l = ylist_entry(i, yaffs_obj_t, siblings); - yaffs_del_obj(l); - } + list_for_each_safe(i, n, + &dev->unlinked_dir->variant.dir_variant.children) { + l = list_entry(i, struct yaffs_obj, siblings); + yaffs_del_obj(l); } - ylist_for_each_safe(i, n, - &dev->del_dir->variant.dir_variant.children) { - if (i) { - l = ylist_entry(i, yaffs_obj_t, siblings); - yaffs_del_obj(l); - } + list_for_each_safe(i, n, &dev->del_dir->variant.dir_variant.children) { + l = list_entry(i, struct yaffs_obj, siblings); + yaffs_del_obj(l); } - } /* @@ -4229,30 +4212,30 @@ static void yaffs_strip_deleted_objs(yaffs_dev_t *dev) * - Directly or indirectly under root. * * Note: - * This code assumes that we don't ever change the current relationships between - * directories: + * This code assumes that we don't ever change the current relationships + * between directories: * root_dir->parent == unlinked_dir->parent == del_dir->parent == NULL - * lostNfound->parent == root_dir + * 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. + * This fixes the problem where directories might have inadvertently been + * deleted leaving the object "hanging" without being rooted in the + * directory tree. */ - -static int yaffs_has_null_parent(yaffs_dev_t *dev, yaffs_obj_t *obj) + +static int yaffs_has_null_parent(struct yaffs_dev *dev, struct yaffs_obj *obj) { return (obj == dev->del_dir || - obj == dev->unlinked_dir|| - obj == dev->root_dir); + obj == dev->unlinked_dir || obj == dev->root_dir); } -static void yaffs_fix_hanging_objs(yaffs_dev_t *dev) +static void yaffs_fix_hanging_objs(struct yaffs_dev *dev) { - yaffs_obj_t *obj; - yaffs_obj_t *parent; + struct yaffs_obj *obj; + struct yaffs_obj *parent; int i; - struct ylist_head *lh; - struct ylist_head *n; - int depthLimit; + struct list_head *lh; + struct list_head *n; + int depth_limit; int hanging; if (dev->read_only) @@ -4263,375 +4246,137 @@ static void yaffs_fix_hanging_objs(yaffs_dev_t *dev) * Make sure it is rooted. */ - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - ylist_for_each_safe(lh, n, &dev->obj_bucket[i].list) { - if (lh) { - obj = ylist_entry(lh, yaffs_obj_t, hash_link); - parent= obj->parent; - - if(yaffs_has_null_parent(dev,obj)){ - /* These directories are not hanging */ - hanging = 0; + for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { + list_for_each_safe(lh, n, &dev->obj_bucket[i].list) { + obj = list_entry(lh, struct yaffs_obj, hash_link); + parent = obj->parent; + + if (yaffs_has_null_parent(dev, obj)) { + /* These directories are not hanging */ + hanging = 0; + } else if (!parent || + parent->variant_type != + YAFFS_OBJECT_TYPE_DIRECTORY) { + hanging = 1; + } else if (yaffs_has_null_parent(dev, parent)) { + hanging = 0; + } else { + /* + * 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--; } - else if(!parent || parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) + if (parent != dev->root_dir) 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; - depthLimit=100; - - while(parent != dev->root_dir && - parent->parent && - parent->parent->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY && - depthLimit > 0){ - parent = parent->parent; - depthLimit--; - } - 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 (hanging) { + yaffs_trace(YAFFS_TRACE_SCAN, + "Hanging object %d moved to lost and found", + obj->obj_id); + yaffs_add_obj_to_dir(dev->lost_n_found, obj); } } } } - /* * Delete directory contents for cleaning up lost and found. */ -static void yaffs_del_dir_contents(yaffs_obj_t *dir) -{ - yaffs_obj_t *obj; - struct ylist_head *lh; - struct ylist_head *n; - - if(dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) - YBUG(); - - ylist_for_each_safe(lh, n, &dir->variant.dir_variant.children) { - if (lh) { - obj = ylist_entry(lh, yaffs_obj_t, siblings); - if(obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) - yaffs_del_dir_contents(obj); - - 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_empty_l_n_f(yaffs_dev_t *dev) +static void yaffs_del_dir_contents(struct yaffs_obj *dir) { - yaffs_del_dir_contents(dev->lost_n_found); -} - -static void yaffs_check_obj_details_loaded(yaffs_obj_t *in) -{ - __u8 *chunkData; - yaffs_obj_header *oh; - yaffs_dev_t *dev; - yaffs_ext_tags tags; - int result; - int alloc_failed = 0; - - if (!in) - return; - - dev = in->my_dev; - -#if 0 - T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR), - in->obj_id, - in->lazy_loaded ? "not yet" : "already")); -#endif + struct yaffs_obj *obj; + struct list_head *lh; + struct list_head *n; - if (in->lazy_loaded && in->hdr_chunk > 0) { - in->lazy_loaded = 0; - chunkData = yaffs_get_temp_buffer(dev, __LINE__); - - result = yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, chunkData, &tags); - oh = (yaffs_obj_header *) chunkData; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; + if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) + BUG(); -#endif - 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, chunkData, __LINE__); + list_for_each_safe(lh, n, &dir->variant.dir_variant.children) { + obj = list_entry(lh, struct yaffs_obj, siblings); + if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) + yaffs_del_dir_contents(obj); + yaffs_trace(YAFFS_TRACE_SCAN, + "Deleting lost_found object %d", + obj->obj_id); + yaffs_unlink_obj(obj); } } -/*------------------------------ Directory Functions ----------------------------- */ - -/* - *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_update_parent(yaffs_obj_t *obj) -{ - yaffs_dev_t *dev; - if(!obj) - return; -#ifndef CONFIG_YAFFS_WINCE - - dev = obj->my_dev; - obj->dirty = 1; - obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME; - if(dev->param.defered_dir_update){ - struct ylist_head *link = &obj->variant.dir_variant.dirty; - - if(ylist_empty(link)){ - ylist_add(link,&dev->dirty_dirs); - T(YAFFS_TRACE_BACKGROUND, (TSTR("Added object %d to dirty directories" TENDSTR),obj->obj_id)); - } - - } else - yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); -#endif -} - -void yaffs_update_dirty_dirs(yaffs_dev_t *dev) +static void yaffs_empty_l_n_f(struct yaffs_dev *dev) { - struct ylist_head *link; - yaffs_obj_t *obj; - yaffs_dir_s *dS; - yaffs_obj_variant *oV; - - T(YAFFS_TRACE_BACKGROUND, (TSTR("Update dirty directories" TENDSTR))); - - while(!ylist_empty(&dev->dirty_dirs)){ - link = dev->dirty_dirs.next; - ylist_del_init(link); - - dS=ylist_entry(link,yaffs_dir_s,dirty); - oV = ylist_entry(dS,yaffs_obj_variant,dir_variant); - obj = ylist_entry(oV,yaffs_obj_t,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(yaffs_obj_t *obj) -{ - yaffs_dev_t *dev = obj->my_dev; - yaffs_obj_t *parent; - - yaffs_verify_obj_in_dir(obj); - parent = obj->parent; - - yaffs_verify_dir(parent); - - if (dev && dev->param.remove_obj_fn) - dev->param.remove_obj_fn(obj); - - - ylist_del_init(&obj->siblings); - obj->parent = NULL; - - yaffs_verify_dir(parent); + yaffs_del_dir_contents(dev->lost_n_found); } -void yaffs_add_obj_to_dir(yaffs_obj_t *directory, - yaffs_obj_t *obj) -{ - if (!directory) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: Trying to add an object to a null pointer directory" - TENDSTR))); - YBUG(); - return; - } - if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: Trying to add an object to a non-directory" - TENDSTR))); - YBUG(); - } - - if (obj->siblings.prev == NULL) { - /* Not initialised */ - YBUG(); - } - - - yaffs_verify_dir(directory); - yaffs_remove_obj_from_dir(obj); - - - /* Now add it */ - ylist_add(&obj->siblings, &directory->variant.dir_variant.children); - obj->parent = directory; - - if (directory == obj->my_dev->unlinked_dir - || directory == obj->my_dev->del_dir) { - obj->unlinked = 1; - obj->my_dev->n_unlinked_files++; - obj->rename_allowed = 0; - } - - yaffs_verify_dir(directory); - yaffs_verify_obj_in_dir(obj); -} - -yaffs_obj_t *yaffs_find_by_name(yaffs_obj_t *directory, +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_obj_t *l; + struct yaffs_obj *l; if (!name) return NULL; if (!directory) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_find_by_name: null pointer directory" - TENDSTR))); - YBUG(); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: yaffs_find_by_name: null pointer directory" + ); + BUG(); return NULL; } if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_find_by_name: non-directory" TENDSTR))); - YBUG(); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: yaffs_find_by_name: non-directory" + ); + BUG(); } sum = yaffs_calc_name_sum(name); - ylist_for_each(i, &directory->variant.dir_variant.children) { - if (i) { - l = ylist_entry(i, yaffs_obj_t, siblings); + list_for_each(i, &directory->variant.dir_variant.children) { + l = list_entry(i, struct yaffs_obj, siblings); - if (l->parent != directory) - YBUG(); + if (l->parent != directory) + BUG(); - yaffs_check_obj_details_loaded(l); + yaffs_check_obj_details_loaded(l); - /* Special case for lost-n-found */ - if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { - if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0) - return l; - } else if (yaffs_sum_cmp(l->sum, sum) || l->hdr_chunk <= 0) { - /* LostnFound chunk called Objxxx - * Do a real check - */ - yaffs_get_obj_name(l, buffer, - YAFFS_MAX_NAME_LENGTH + 1); - if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0) - return l; - } + /* Special case for lost-n-found */ + if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { + if (!strcmp(name, YAFFS_LOSTNFOUND_NAME)) + return l; + } else if (l->sum == sum || l->hdr_chunk <= 0) { + /* LostnFound chunk called Objxxx + * Do a real check + */ + yaffs_get_obj_name(l, buffer, + YAFFS_MAX_NAME_LENGTH + 1); + if (!strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH)) + return l; } } - return NULL; } - -#if 0 -int yaffs_ApplyToDirectoryChildren(yaffs_obj_t *the_dir, - int (*fn) (yaffs_obj_t *)) -{ - struct ylist_head *i; - yaffs_obj_t *l; - - if (!the_dir) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_find_by_name: null pointer directory" - TENDSTR))); - YBUG(); - return YAFFS_FAIL; - } - if (the_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_find_by_name: non-directory" TENDSTR))); - YBUG(); - return YAFFS_FAIL; - } - - ylist_for_each(i, &the_dir->variant.dir_variant.children) { - if (i) { - l = ylist_entry(i, yaffs_obj_t, siblings); - if (l && !fn(l)) - return YAFFS_FAIL; - } - } - - return YAFFS_OK; - -} -#endif - /* GetEquivalentObject dereferences any hard links to get to the * actual object. */ -yaffs_obj_t *yaffs_get_equivalent_obj(yaffs_obj_t *obj) +struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj) { if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { - /* We want the object id of the equivalent object, not this one */ obj = obj->variant.hardlink_variant.equiv_obj; yaffs_check_obj_details_loaded(obj); } @@ -4651,173 +4396,106 @@ yaffs_obj_t *yaffs_get_equivalent_obj(yaffs_obj_t *obj) * 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 + * - 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]. */ -static void yaffs_fix_null_name(yaffs_obj_t * obj,YCHAR * name, int buffer_size) +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 locName[20]; - YCHAR numString[20]; - YCHAR *x = &numString[19]; + if (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; - numString[19] = 0; - while(v>0){ + 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, buffer_size - 1); - } -} - -static void yaffs_load_name_from_oh(yaffs_dev_t *dev,YCHAR *name, const YCHAR *ohName, int bufferSize) -{ -#ifdef CONFIG_YAFFS_AUTO_UNICODE - if(dev->param.auto_unicode){ - if(*ohName){ - /* It is an ASCII name, so do an ASCII to unicode conversion */ - const char *asciiOhName = (const char *)ohName; - int n = bufferSize - 1; - while(n > 0 && *asciiOhName){ - *name = *asciiOhName; - name++; - asciiOhName++; - n--; - } - } else - yaffs_strncpy(name,ohName+1, bufferSize -1); - } else -#endif - yaffs_strncpy(name, ohName, bufferSize - 1); -} - - -static void yaffs_load_oh_from_name(yaffs_dev_t *dev, YCHAR *ohName, const YCHAR *name) -{ -#ifdef CONFIG_YAFFS_AUTO_UNICODE - - int isAscii; - YCHAR *w; - - if(dev->param.auto_unicode){ - - isAscii = 1; - w = name; - - /* Figure out if the name will fit in ascii character set */ - while(isAscii && *w){ - if((*w) & 0xff00) - isAscii = 0; - w++; - } - - if(isAscii){ - /* It is an ASCII name, so do a unicode to ascii conversion */ - char *asciiOhName = (char *)ohName; - int n = YAFFS_MAX_NAME_LENGTH - 1; - while(n > 0 && *name){ - *asciiOhName= *name; - name++; - asciiOhName++; - n--; - } - } else{ - /* It is a unicode name, so save starting at the second YCHAR */ - *ohName = 0; - yaffs_strncpy(ohName+1,name, YAFFS_MAX_NAME_LENGTH -2); - } + strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX); + strcat(local_name, x); + strncpy(name, local_name, buffer_size - 1); } - else -#endif - yaffs_strncpy(ohName,name, YAFFS_MAX_NAME_LENGTH - 1); - } -int yaffs_get_obj_name(yaffs_obj_t * obj, YCHAR * name, int buffer_size) +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); - } -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - else if (obj->short_name[0]) { - yaffs_strcpy(name, obj->short_name); - } -#endif - else if(obj->hdr_chunk > 0) { + strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1); + } else if (obj->short_name[0]) { + strcpy(name, obj->short_name); + } else if (obj->hdr_chunk > 0) { int result; - __u8 *buffer = yaffs_get_temp_buffer(obj->my_dev, __LINE__); + u8 *buffer = yaffs_get_temp_buffer(obj->my_dev); - yaffs_obj_header *oh = (yaffs_obj_header *) buffer; + struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)buffer; memset(buffer, 0, obj->my_dev->data_bytes_per_chunk); if (obj->hdr_chunk > 0) { result = yaffs_rd_chunk_tags_nand(obj->my_dev, - obj->hdr_chunk, buffer, - NULL); + obj->hdr_chunk, + buffer, NULL); } - yaffs_load_name_from_oh(obj->my_dev,name,oh->name,buffer_size); + yaffs_load_name_from_oh(obj->my_dev, name, oh->name, + buffer_size); - yaffs_release_temp_buffer(obj->my_dev, buffer, __LINE__); + yaffs_release_temp_buffer(obj->my_dev, buffer); } - yaffs_fix_null_name(obj,name,buffer_size); + yaffs_fix_null_name(obj, name, buffer_size); - return yaffs_strnlen(name,YAFFS_MAX_NAME_LENGTH); + return strnlen(name, YAFFS_MAX_NAME_LENGTH); } - -int yaffs_get_obj_length(yaffs_obj_t *obj) +loff_t yaffs_get_obj_length(struct yaffs_obj *obj) { /* Dereference any hard linking */ obj = yaffs_get_equivalent_obj(obj); 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) + 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); + return strnlen(obj->variant.symlink_variant.alias, + YAFFS_MAX_ALIAS_LENGTH); } else { /* Only a directory should drop through to here */ return obj->my_dev->data_bytes_per_chunk; } } -int yaffs_get_obj_link_count(yaffs_obj_t *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->hard_links) - count++; /* add the hard links; */ + list_for_each(i, &obj->hard_links) + count++; /* add the hard links; */ return count; } -int yaffs_get_obj_inode(yaffs_obj_t *obj) +int yaffs_get_obj_inode(struct yaffs_obj *obj) { obj = yaffs_get_equivalent_obj(obj); return obj->obj_id; } -unsigned yaffs_get_obj_type(yaffs_obj_t *obj) +unsigned yaffs_get_obj_type(struct yaffs_obj *obj) { obj = yaffs_get_equivalent_obj(obj); @@ -4843,13 +4521,15 @@ unsigned yaffs_get_obj_type(yaffs_obj_t *obj) return DT_BLK; if (S_ISSOCK(obj->yst_mode)) return DT_SOCK; + return DT_REG; + break; default: return DT_REG; break; } } -YCHAR *yaffs_get_symlink_alias(yaffs_obj_t *obj) +YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj) { obj = yaffs_get_equivalent_obj(obj); if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) @@ -4858,276 +4538,82 @@ YCHAR *yaffs_get_symlink_alias(yaffs_obj_t *obj) return yaffs_clone_str(_Y("")); } -#ifndef CONFIG_YAFFS_WINCE - -int yaffs_set_attribs(yaffs_obj_t *obj, struct iattr *attr) -{ - unsigned int valid = attr->ia_valid; - - if (valid & ATTR_MODE) - obj->yst_mode = attr->ia_mode; - if (valid & ATTR_UID) - obj->yst_uid = attr->ia_uid; - if (valid & ATTR_GID) - obj->yst_gid = attr->ia_gid; - - if (valid & ATTR_ATIME) - obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime); - if (valid & ATTR_CTIME) - obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime); - if (valid & ATTR_MTIME) - obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime); - - if (valid & ATTR_SIZE) - yaffs_resize_file(obj, attr->ia_size); - - yaffs_update_oh(obj, NULL, 1, 0, 0, NULL); - - return YAFFS_OK; - -} -int yaffs_get_attribs(yaffs_obj_t *obj, struct iattr *attr) -{ - unsigned int valid = 0; - - attr->ia_mode = obj->yst_mode; - valid |= ATTR_MODE; - attr->ia_uid = obj->yst_uid; - valid |= ATTR_UID; - attr->ia_gid = obj->yst_gid; - valid |= ATTR_GID; - - Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime; - valid |= ATTR_ATIME; - Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime; - valid |= ATTR_CTIME; - Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; - valid |= ATTR_MTIME; - - attr->ia_size = yaffs_get_file_size(obj); - valid |= ATTR_SIZE; - - attr->ia_valid = valid; - - return YAFFS_OK; -} - -#endif - - -static int yaffs_do_xattrib_mod(yaffs_obj_t *obj, int set, const YCHAR *name, const void *value, int size, int flags) -{ - yaffs_xattr_mod xmod; - - int result; - - xmod.set = set; - xmod.name = name; - xmod.data = value; - xmod.size = size; - xmod.flags = flags; - xmod.result = -ENOSPC; - - result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod); - - if(result > 0) - return xmod.result; - else - return -ENOSPC; -} - -static int yaffs_apply_xattrib_mod(yaffs_obj_t *obj, char *buffer, yaffs_xattr_mod *xmod) -{ - int retval = 0; - int x_offs = sizeof(yaffs_obj_header); - yaffs_dev_t *dev = obj->my_dev; - int x_size = dev->data_bytes_per_chunk - sizeof(yaffs_obj_header); - - 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; -} - -static int yaffs_do_xattrib_fetch(yaffs_obj_t *obj, const YCHAR *name, void *value, int size) -{ - char *buffer = NULL; - int result; - yaffs_ext_tags tags; - yaffs_dev_t *dev = obj->my_dev; - int x_offs = sizeof(yaffs_obj_header); - int x_size = dev->data_bytes_per_chunk - sizeof(yaffs_obj_header); - - char * x_buffer; - - int retval = 0; - - if(obj->hdr_chunk < 1) - return -ENODATA; - - /* 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; - } - - buffer = (char *) yaffs_get_temp_buffer(dev, __LINE__); - if(!buffer) - return -ENOMEM; - - 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; -} - -int yaffs_set_xattrib(yaffs_obj_t *obj, const YCHAR *name, const void * value, int size, int flags) -{ - return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags); -} - -int yaffs_remove_xattrib(yaffs_obj_t *obj, const YCHAR *name) -{ - return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0); -} - -int yaffs_get_xattrib(yaffs_obj_t *obj, const YCHAR *name, void *value, int size) -{ - return yaffs_do_xattrib_fetch(obj, name, value, size); -} - -int yaffs_list_xattrib(yaffs_obj_t *obj, char *buffer, int size) -{ - return yaffs_do_xattrib_fetch(obj, NULL, buffer,size); -} - - - -#if 0 -int yaffs_dump_obj(yaffs_obj_t *obj) -{ - YCHAR name[257]; - - yaffs_get_obj_name(obj, name, YAFFS_MAX_NAME_LENGTH + 1); - - 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->obj_id, yaffs_get_obj_inode(obj), name, - obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdr_chunk, - yaffs_get_obj_type(obj), yaffs_get_obj_length(obj))); - - return YAFFS_OK; -} -#endif - -/*---------------------------- Initialisation code -------------------------------------- */ +/*--------------------------- Initialisation code -------------------------- */ -static int yaffs_cehck_dev_fns(const yaffs_dev_t *dev) +static int yaffs_check_dev_fns(struct yaffs_dev *dev) { + struct yaffs_driver *drv = &dev->drv; + struct yaffs_tags_handler *tagger = &dev->tagger; /* Common functions, gotta have */ - if (!dev->param.erase_fn || !dev->param.initialise_flash_fn) + if (!drv->drv_read_chunk_fn || + !drv->drv_write_chunk_fn || + !drv->drv_erase_fn) return 0; -#ifdef CONFIG_YAFFS_YAFFS2 + if (dev->param.is_yaffs2 && + (!drv->drv_mark_bad_fn || !drv->drv_check_bad_fn)) + return 0; - /* Can use the "with tags" style interface for yaffs1 or yaffs2 */ - 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 + /* Install the default tags marshalling functions if needed. */ + yaffs_tags_compat_install(dev); + yaffs_tags_marshall_install(dev); - /* Can use the "spare" style interface for yaffs1 */ - 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; + /* Check we now have the marshalling functions required. */ + if (!tagger->write_chunk_tags_fn || + !tagger->read_chunk_tags_fn || + !tagger->query_block_fn || + !tagger->mark_bad_fn) + return 0; - return 0; /* bad */ + return 1; } - -static int yaffs_create_initial_dir(yaffs_dev_t *dev) +static int yaffs_create_initial_dir(struct yaffs_dev *dev) { - /* Initialise the unlinked, deleted, root and lost and found directories */ - - dev->lost_n_found = dev->root_dir = NULL; + /* Initialise the unlinked, deleted, root and lost+found directories */ + dev->lost_n_found = dev->root_dir = NULL; dev->unlinked_dir = dev->del_dir = NULL; - dev->unlinked_dir = yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); - dev->del_dir = yaffs_create_fake_dir(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); - dev->root_dir = yaffs_create_fake_dir(dev, YAFFS_OBJECTID_ROOT, - YAFFS_ROOT_MODE | S_IFDIR); + YAFFS_ROOT_MODE | S_IFDIR); dev->lost_n_found = yaffs_create_fake_dir(dev, YAFFS_OBJECTID_LOSTNFOUND, - YAFFS_LOSTNFOUND_MODE | S_IFDIR); + YAFFS_LOSTNFOUND_MODE | S_IFDIR); - if (dev->lost_n_found && dev->root_dir && dev->unlinked_dir && dev->del_dir) { + 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_guts_initialise(yaffs_dev_t *dev) +/* Low level init. + * Typically only used by yaffs_guts_initialise, but also used by the + * Low level yaffs driver tests. + */ + +int yaffs_guts_ll_init(struct yaffs_dev *dev) { - int init_failed = 0; - unsigned x; - int bits; - T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_guts_initialise()" TENDSTR))); - /* Check stuff that must be set */ + yaffs_trace(YAFFS_TRACE_TRACING, "yaffs: yaffs_ll_init()"); if (!dev) { - T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Need a device" + ); return YAFFS_FAIL; } + if (dev->ll_init) + return YAFFS_OK; + dev->internal_start_block = dev->param.start_block; dev->internal_end_block = dev->param.end_block; dev->block_offset = 0; @@ -5145,57 +4631,88 @@ int yaffs_guts_initialise(yaffs_dev_t *dev) /* Check geometry parameters. */ - 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, inband_tags %d " - TENDSTR), dev->param.total_bytes_per_chunk, dev->param.is_yaffs2 ? "2" : "", dev->param.inband_tags)); - return YAFFS_FAIL; - } - - if (yaffs_init_nand(dev) != YAFFS_OK) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: InitialiseNAND failed" TENDSTR))); + if ((!dev->param.inband_tags && dev->param.is_yaffs2 && + dev->param.total_bytes_per_chunk < 1024) || + (!dev->param.is_yaffs2 && + dev->param.total_bytes_per_chunk < 512) || + (dev->param.inband_tags && !dev->param.is_yaffs2) || + dev->param.chunks_per_block < 2 || + dev->param.n_reserved_blocks < 2 || + dev->internal_start_block <= 0 || + dev->internal_end_block <= 0 || + dev->internal_end_block <= + (dev->internal_start_block + dev->param.n_reserved_blocks + 2) + ) { + /* otherwise it is too small */ + yaffs_trace(YAFFS_TRACE_ALWAYS, + "NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d ", + dev->param.total_bytes_per_chunk, + dev->param.is_yaffs2 ? "2" : "", + dev->param.inband_tags); return YAFFS_FAIL; } /* Sort out space for inband tags, if required */ if (dev->param.inband_tags) - dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk - sizeof(yaffs_PackedTags2TagsPart); + dev->data_bytes_per_chunk = + dev->param.total_bytes_per_chunk - + sizeof(struct yaffs_packed_tags2_tags_only); else dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk; /* Got the right mix of functions? */ - if (!yaffs_cehck_dev_fns(dev)) { + if (!yaffs_check_dev_fns(dev)) { /* Function missing */ - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs: device function(s) missing or wrong\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "device function(s) missing or wrong"); return YAFFS_FAIL; } - /* This is really a compilation check. */ - if (!yaffs_check_structures()) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs_check_structures failed\n" TENDSTR))); + if (yaffs_init_nand(dev) != YAFFS_OK) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "InitialiseNAND failed"); return YAFFS_FAIL; } - if (dev->is_mounted) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: device already mounted\n" TENDSTR))); + return YAFFS_OK; +} + + +int yaffs_format_dev(struct yaffs_dev *dev) +{ + int i; + enum yaffs_block_state state; + u32 dummy; + + if(yaffs_guts_ll_init(dev) != YAFFS_OK) + return YAFFS_FAIL; + + if(dev->is_mounted) return YAFFS_FAIL; + + for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { + yaffs_query_init_block_state(dev, i, &state, &dummy); + if (state != YAFFS_BLOCK_STATE_DEAD) + yaffs_erase_block(dev, i); } - /* Finished with most checks. One or two more checks happen later on too. */ + return YAFFS_OK; +} + + +int yaffs_guts_initialise(struct yaffs_dev *dev) +{ + int init_failed = 0; + unsigned x; + int bits; + + if(yaffs_guts_ll_init(dev) != YAFFS_OK) + return YAFFS_FAIL; + + if (dev->is_mounted) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "device already mounted"); + return YAFFS_FAIL; + } dev->is_mounted = 1; @@ -5206,11 +4723,11 @@ int yaffs_guts_initialise(yaffs_dev_t *dev) */ x = dev->data_bytes_per_chunk; /* We always use dev->chunk_shift and dev->chunk_div */ - dev->chunk_shift = Shifts(x); + 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; + dev->chunk_mask = (1 << dev->chunk_shift) - 1; /* * Calculate chunk_grp_bits. @@ -5219,7 +4736,7 @@ int yaffs_guts_initialise(yaffs_dev_t *dev) 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->param.wide_tnodes_disabled) { @@ -5230,10 +4747,11 @@ int yaffs_guts_initialise(yaffs_dev_t *dev) dev->tnode_width = 16; else dev->tnode_width = bits; - } else + } else { dev->tnode_width = 16; + } - dev->tnode_mask = (1<<dev->tnode_width)-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 @@ -5246,9 +4764,9 @@ int yaffs_guts_initialise(yaffs_dev_t *dev) else dev->chunk_grp_bits = bits - dev->tnode_width; - dev->tnode_size = (dev->tnode_width * YAFFS_NTNODES_LEVEL0)/8; - if(dev->tnode_size < sizeof(yaffs_tnode_t)) - dev->tnode_size = sizeof(yaffs_tnode_t); + 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->chunk_grp_size = 1 << dev->chunk_grp_bits; @@ -5257,13 +4775,12 @@ int yaffs_guts_initialise(yaffs_dev_t *dev) * the chunk group size > chunks per block. * This can be remedied by using larger "virtual blocks". */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: chunk group too large\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, "chunk group too large"); return YAFFS_FAIL; } - /* OK, we've finished verifying the device, lets continue with initialisation */ + /* Finished verifying the device, continue with initialisation */ /* More device initialisation */ dev->all_gcs = 0; @@ -5282,9 +4799,10 @@ int yaffs_guts_initialise(yaffs_dev_t *dev) 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 */ - YINIT_LIST_HEAD(&dev->dirty_dirs); + 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; @@ -5295,28 +4813,28 @@ int yaffs_guts_initialise(yaffs_dev_t *dev) dev->cache = NULL; dev->gc_cleanup_list = NULL; - - if (!init_failed && - dev->param.n_caches > 0) { + if (!init_failed && dev->param.n_caches > 0) { int i; void *buf; - int cacheBytes = dev->param.n_caches * sizeof(yaffs_cache_t); + int cache_bytes = + dev->param.n_caches * sizeof(struct yaffs_cache); if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES) dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES; - dev->cache = YMALLOC(cacheBytes); + dev->cache = kmalloc(cache_bytes, GFP_NOFS); - buf = (__u8 *) dev->cache; + buf = (u8 *) dev->cache; if (dev->cache) - memset(dev->cache, 0, cacheBytes); + memset(dev->cache, 0, cache_bytes); 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); + dev->cache[i].data = buf = + kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); } if (!buf) init_failed = 1; @@ -5327,7 +4845,9 @@ int yaffs_guts_initialise(yaffs_dev_t *dev) dev->cache_hits = 0; if (!init_failed) { - dev->gc_cleanup_list = YMALLOC(dev->param.chunks_per_block * sizeof(__u32)); + dev->gc_cleanup_list = + kmalloc(dev->param.chunks_per_block * sizeof(u32), + GFP_NOFS); if (!dev->gc_cleanup_list) init_failed = 1; } @@ -5343,18 +4863,24 @@ int yaffs_guts_initialise(yaffs_dev_t *dev) if (!init_failed && !yaffs_create_initial_dir(dev)) init_failed = 1; + if (!init_failed && dev->param.is_yaffs2 && + !dev->param.disable_summary && + !yaffs_summary_init(dev)) + init_failed = 1; if (!init_failed) { /* Now scan the flash. */ if (dev->param.is_yaffs2) { if (yaffs2_checkpt_restore(dev)) { yaffs_check_obj_details_loaded(dev->root_dir); - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: restored from checkpoint" TENDSTR))); + yaffs_trace(YAFFS_TRACE_CHECKPOINT | + YAFFS_TRACE_MOUNT, + "yaffs: restored from checkpoint" + ); } else { - /* Clean up the mess caused by an aborted checkpoint load - * and scan backwards. + /* Clean up the mess caused by an aborted + * checkpoint load then scan backwards. */ yaffs_deinit_blocks(dev); @@ -5373,25 +4899,27 @@ int yaffs_guts_initialise(yaffs_dev_t *dev) yaffs_init_tnodes_and_objs(dev); - if (!init_failed && !yaffs_create_initial_dir(dev)) + if (!init_failed + && !yaffs_create_initial_dir(dev)) init_failed = 1; if (!init_failed && !yaffs2_scan_backwards(dev)) init_failed = 1; } - } else if (!yaffs1_scan(dev)) - init_failed = 1; + } else if (!yaffs1_scan(dev)) { + init_failed = 1; + } yaffs_strip_deleted_objs(dev); yaffs_fix_hanging_objs(dev); - if(dev->param.empty_lost_n_found) + 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_guts_initialise() aborted.\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: yaffs_guts_initialise() aborted."); yaffs_deinitialise(dev); return YAFFS_FAIL; @@ -5402,7 +4930,7 @@ int yaffs_guts_initialise(yaffs_dev_t *dev) dev->n_page_writes = 0; dev->n_erasures = 0; dev->n_gc_copies = 0; - dev->n_retired_writes = 0; + dev->n_retried_writes = 0; dev->n_retired_blocks = 0; @@ -5410,53 +4938,50 @@ int yaffs_guts_initialise(yaffs_dev_t *dev) yaffs_verify_blocks(dev); /* Clean up any aborted checkpoint data */ - if(!dev->is_checkpointed && dev->blocks_in_checkpt > 0) + if (!dev->is_checkpointed && dev->blocks_in_checkpt > 0) yaffs2_checkpt_invalidate(dev); - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: yaffs_guts_initialise() done.\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: yaffs_guts_initialise() done."); return YAFFS_OK; - } -void yaffs_deinitialise(yaffs_dev_t *dev) +void yaffs_deinitialise(struct yaffs_dev *dev) { if (dev->is_mounted) { int i; yaffs_deinit_blocks(dev); yaffs_deinit_tnodes_and_objs(dev); - if (dev->param.n_caches > 0 && - dev->cache) { + yaffs_summary_deinit(dev); + + if (dev->param.n_caches > 0 && dev->cache) { for (i = 0; i < dev->param.n_caches; i++) { - if (dev->cache[i].data) - YFREE(dev->cache[i].data); + kfree(dev->cache[i].data); dev->cache[i].data = NULL; } - YFREE(dev->cache); + kfree(dev->cache); dev->cache = NULL; } - YFREE(dev->gc_cleanup_list); + kfree(dev->gc_cleanup_list); for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) - YFREE(dev->temp_buffer[i].buffer); + kfree(dev->temp_buffer[i].buffer); dev->is_mounted = 0; - if (dev->param.deinitialise_flash_fn) - dev->param.deinitialise_flash_fn(dev); + yaffs_deinit_nand(dev); } } -int yaffs_count_free_chunks(yaffs_dev_t *dev) +int yaffs_count_free_chunks(struct yaffs_dev *dev) { - int nFree=0; + int n_free = 0; int b; - - yaffs_block_info_t *blk; + struct yaffs_block_info *blk; blk = dev->block_info; for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) { @@ -5465,7 +4990,7 @@ int yaffs_count_free_chunks(yaffs_dev_t *dev) case YAFFS_BLOCK_STATE_ALLOCATING: case YAFFS_BLOCK_STATE_COLLECTING: case YAFFS_BLOCK_STATE_FULL: - nFree += + n_free += (dev->param.chunks_per_block - blk->pages_in_use + blk->soft_del_pages); break; @@ -5474,71 +4999,84 @@ int yaffs_count_free_chunks(yaffs_dev_t *dev) } blk++; } - - return nFree; + return n_free; } -int yaffs_get_n_free_chunks(yaffs_dev_t *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->n_free_chunks; -#else - nFree = yaffs_count_free_chunks(dev); -#endif - - nFree += dev->n_deleted_files; + n_free = dev->n_free_chunks; + n_free += dev->n_deleted_files; - /* Now count the number of dirty chunks in the cache and subtract those */ + /* Now count and subtract the number of dirty chunks in the cache. */ - for (nDirtyCacheChunks = 0, i = 0; i < dev->param.n_caches; i++) { + for (n_dirty_caches = 0, i = 0; i < dev->param.n_caches; i++) { if (dev->cache[i].dirty) - nDirtyCacheChunks++; + n_dirty_caches++; } - nFree -= nDirtyCacheChunks; + n_free -= n_dirty_caches; - nFree -= ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block); + 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_calc_checkpt_blocks_required(dev); + /* Now figure checkpoint space and report that... */ + blocks_for_checkpt = yaffs_calc_checkpt_blocks_required(dev); - nFree -= (blocksForCheckpoint * dev->param.chunks_per_block); + n_free -= (blocks_for_checkpt * dev->param.chunks_per_block); + + if (n_free < 0) + n_free = 0; + + return n_free; +} - if (nFree < 0) - nFree = 0; - return nFree; +/* + * Marshalling functions to get loff_t file sizes into and out of + * object headers. + */ +void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize) +{ + oh->file_size_low = (fsize & 0xFFFFFFFF); + oh->file_size_high = ((fsize >> 32) & 0xFFFFFFFF); } +loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh) +{ + loff_t retval; -/*---------------------------------------- YAFFS test code ----------------------*/ + if (sizeof(loff_t) >= 8 && ~(oh->file_size_high)) + retval = (((loff_t) oh->file_size_high) << 32) | + (((loff_t) oh->file_size_low) & 0xFFFFFFFF); + else + retval = (loff_t) oh->file_size_low; + + return retval; +} -#define yaffs_check_struct(structure, syze, name) \ - do { \ - if (sizeof(structure) != syze) { \ - T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\ - name, syze, (int) sizeof(structure))); \ - return YAFFS_FAIL; \ - } \ - } while (0) -static int yaffs_check_structures(void) +void yaffs_count_blocks_by_state(struct yaffs_dev *dev, int bs[10]) { -/* yaffs_check_struct(yaffs_tags_t,8,"yaffs_tags_t"); */ -/* yaffs_check_struct(yaffs_tags_union_t,8,"yaffs_tags_union_t"); */ -/* yaffs_check_struct(yaffs_spare,16,"yaffs_spare"); */ -/* yaffs_check_struct(yaffs_tnode_t, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_tnode_t"); */ + int i; + struct yaffs_block_info *bi; + int s; -#ifndef CONFIG_YAFFS_WINCE - yaffs_check_struct(yaffs_obj_header, 512, "yaffs_obj_header"); -#endif - return YAFFS_OK; + for(i = 0; i < 10; i++) + bs[i] = 0; + + for(i = dev->internal_start_block; i <= dev->internal_end_block; i++) { + bi = yaffs_get_block_info(dev, i); + s = bi->block_state; + if(s > YAFFS_BLOCK_STATE_DEAD || s < YAFFS_BLOCK_STATE_UNKNOWN) + bs[0]++; + else + bs[s]++; + } } |