#include "yaffs_ecc.h"
-/* Robustification (if it ever comes about...) */
-static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block);
-static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk,
- int erased_ok);
-static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk,
- const u8 * data,
- const struct yaffs_ext_tags *tags);
-static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk,
- const struct yaffs_ext_tags *tags);
-
-/* Other local prototypes */
-static void yaffs_update_parent(struct yaffs_obj *obj);
-static int yaffs_unlink_obj(struct yaffs_obj *obj);
-static int yaffs_obj_cache_dirty(struct yaffs_obj *obj);
-
-static int yaffs_write_new_chunk(struct yaffs_dev *dev,
- const u8 * buffer,
- struct yaffs_ext_tags *tags, int use_reserver);
-
-static struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number,
- enum yaffs_obj_type type);
-
-static int yaffs_apply_xattrib_mod(struct yaffs_obj *obj, char *buffer,
- struct yaffs_xattr_mod *xmod);
-
-static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj);
-static int yaffs_generic_obj_del(struct yaffs_obj *in);
-
-static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk);
-
-static int yaffs_unlink_worker(struct yaffs_obj *obj);
-
-static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id,
- int chunk_obj);
-
-static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver,
- struct yaffs_block_info **block_ptr);
-
-static void yaffs_check_obj_details_loaded(struct yaffs_obj *in);
+/* Forward declarations */
-static void yaffs_invalidate_whole_cache(struct yaffs_obj *in);
-static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object,
- int chunk_id);
-
-static int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
- struct yaffs_ext_tags *tags);
+static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk,
+ const u8 * buffer, int n_bytes, int use_reserve);
-static int yaffs_verify_chunk_written(struct yaffs_dev *dev,
- int nand_chunk,
- const u8 * data,
- struct yaffs_ext_tags *tags);
-static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR * name,
- const YCHAR * oh_name, int buff_size);
-static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR * oh_name,
- const YCHAR * name);
/* Function to calculate chunk and offset */
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);
+ kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
}
return buf ? YAFFS_OK : YAFFS_FAIL;
}
}
- T(YAFFS_TRACE_BUFFERS,
- (TSTR("Out of temp buffers at line %d, other held by lines:"),
- line_no));
+ yaffs_trace(YAFFS_TRACE_BUFFERS,
+ "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," %d", dev->temp_buffer[i].line);
/*
* If we got here then we have to allocate an unmanaged one
*/
dev->unmanaged_buffer_allocs++;
- return YMALLOC(dev->data_bytes_per_chunk);
+ return kmalloc(dev->data_bytes_per_chunk, GFP_NOFS);
}
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 in line %d",
+ line_no);
+ kfree(buffer);
dev->unmanaged_buffer_deallocs++;
}
if (buffer == dev->checkpt_buffer)
return 1;
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "yaffs: unmaged buffer detected.");
return 0;
}
+/*
+ * Functions for robustisizing TODO
+ *
+ */
+
+static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk,
+ const u8 * data,
+ const struct yaffs_ext_tags *tags)
+{
+ dev = dev;
+ nand_chunk = nand_chunk;
+ data = data;
+ tags = tags;
+}
+
+static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk,
+ const struct yaffs_ext_tags *tags)
+{
+ dev = dev;
+ nand_chunk = nand_chunk;
+ tags = tags;
+}
+
+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 this */
+ yaffs_trace(YAFFS_TRACE_ALWAYS, "yaffs: Block struck out");
+
+ }
+ }
+}
+
+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);
+
+ 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);
return n % YAFFS_NOBJECT_BUCKETS;
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;
}
return retval;
}
+
+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)) {
+ /* 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)
+ 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)
+{
+ if (dev->alloc_block > 0) {
+ struct yaffs_block_info *bi =
+ yaffs_get_block_info(dev, dev->alloc_block);
+ if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) {
+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
+ dev->alloc_block = -1;
+ }
+ }
+}
+
static int yaffs_write_new_chunk(struct yaffs_dev *dev,
const u8 * data,
struct yaffs_ext_tags *tags, int use_reserver)
if (!bi->skip_erased_check) {
erased_ok = yaffs_check_chunk_erased(dev, chunk);
if (erased_ok != YAFFS_OK) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs chunk %d was not erased"
- TENDSTR), chunk));
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "**>> yaffs chunk %d was not erased",
+ chunk);
/* If not erased, delete this one,
* skip rest of block and
chunk = -1;
if (attempts > 1) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("**>> yaffs write required %d attempts" TENDSTR),
- attempts));
-
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "**>> yaffs write required %d attempts",
+ attempts);
dev->n_retired_writes += (attempts - 1);
}
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 {
struct yaffs_ext_tags tags;
int 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_trace(YAFFS_TRACE_ALWAYS,
+ "yaffs: Failed to write bad block marker to block %d",
+ flash_block);
yaffs_release_temp_buffer(dev, buffer, __LINE__);
}
dev->n_retired_blocks++;
}
-/*
- * Functions for robustisizing TODO
- *
- */
+/*---------------- Name handling functions ------------*/
-static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk,
- const u8 * data,
- const struct yaffs_ext_tags *tags)
+static u16 yaffs_calc_name_sum(const YCHAR * name)
{
- dev = dev;
- nand_chunk = nand_chunk;
- data = data;
- tags = tags;
+ u16 sum = 0;
+ u16 i = 1;
+
+ const YUCHAR *bname = (const YUCHAR *)name;
+ if (bname) {
+ while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH / 2))) {
+
+ /* 0x1f mask is case insensitive */
+ sum += ((*bname) & 0x1f) * i;
+ i++;
+ bname++;
+ }
+ }
+ return sum;
}
-static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk,
- const struct yaffs_ext_tags *tags)
+void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name)
{
- dev = dev;
- nand_chunk = nand_chunk;
- tags = tags;
-}
-
-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 this */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Block struck out" TENDSTR)));
-
- }
- }
-}
-
-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);
-
- yaffs_handle_chunk_error(dev, bi);
-
- if (erased_ok) {
- /* Was an actual write failure, so mark the block for retirement */
- bi->needs_retiring = 1;
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("**>> Block %d needs retiring" TENDSTR), flash_block));
- }
-
- /* Delete the chunk */
- yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
- yaffs_skip_rest_of_block(dev);
-}
-
-/*---------------- Name handling functions ------------*/
-
-static u16 yaffs_calc_name_sum(const YCHAR * name)
-{
- u16 sum = 0;
- u16 i = 1;
-
- const YUCHAR *bname = (const YUCHAR *)name;
- if (bname) {
- while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH / 2))) {
-
- /* 0x1f mask is case insensitive */
- sum += ((*bname) & 0x1f) * i;
- i++;
- bname++;
- }
- }
- return sum;
-}
-
-void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name)
-{
-#ifndef CONFIG_YAFFS_NO_SHORT_NAMES
- memset(obj->short_name, 0, sizeof(obj->short_name));
- if (name &&
- yaffs_strnlen(name, YAFFS_SHORT_NAME_LENGTH + 1) <=
- YAFFS_SHORT_NAME_LENGTH)
- yaffs_strcpy(obj->short_name, name);
- else
- obj->short_name[0] = _Y('\0');
-#endif
- obj->sum = yaffs_calc_name_sum(name);
+#ifndef CONFIG_YAFFS_NO_SHORT_NAMES
+ memset(obj->short_name, 0, sizeof(obj->short_name));
+ if (name &&
+ strnlen(name, YAFFS_SHORT_NAME_LENGTH + 1) <=
+ YAFFS_SHORT_NAME_LENGTH)
+ strcpy(obj->short_name, name);
+ else
+ obj->short_name[0] = _Y('\0');
+#endif
+ obj->sum = yaffs_calc_name_sum(name);
}
void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj,
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;
}
}
return tn;
}
+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)
return -1;
}
+static int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
+ struct yaffs_ext_tags *tags)
+{
+ /*Get the Tnode, then get the level 0 offset chunk offset */
+ struct yaffs_tnode *tn;
+ int the_chunk = -1;
+ struct yaffs_ext_tags local_tags;
+ int ret_val = -1;
+
+ struct yaffs_dev *dev = in->my_dev;
+
+ if (!tags) {
+ /* Passed a NULL, so use our own tags space */
+ tags = &local_tags;
+ }
+
+ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
+
+ if (tn) {
+ the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
+
+ ret_val =
+ yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
+ inode_chunk);
+ }
+ return ret_val;
+}
+
+static int yaffs_find_del_file_chunk(struct yaffs_obj *in, int inode_chunk,
+ struct yaffs_ext_tags *tags)
+{
+ /* Get the Tnode, then get the level 0 offset chunk offset */
+ struct yaffs_tnode *tn;
+ int the_chunk = -1;
+ struct yaffs_ext_tags local_tags;
+
+ struct yaffs_dev *dev = in->my_dev;
+ int ret_val = -1;
+
+ if (!tags) {
+ /* Passed a NULL, so use our own tags space */
+ tags = &local_tags;
+ }
+
+ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
+
+ if (tn) {
+
+ the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
+
+ ret_val =
+ yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
+ inode_chunk);
+
+ /* 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"
+ );
+ 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;
+
+ existing_cunk = yaffs_get_group_base(dev, tn, inode_chunk);
+
+ if (in_scan != 0) {
+ /* If we're scanning then we need to test for duplicates
+ * NB This does not need to be efficient since it should only ever
+ * happen when the power fails during a write, then only one
+ * chunk should ever be affected.
+ *
+ * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
+ * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
+ */
+
+ if (existing_cunk > 0) {
+ /* NB Right now existing chunk will not be real chunk_id if the chunk group size > 1
+ * thus we have to do a FindChunkInFile to get the real chunk id.
+ *
+ * We have a duplicate now we need to decide which one to use:
+ *
+ * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
+ * Forward scanning YAFFS2: The new one is what we use, dump the old one.
+ * YAFFS1: Get both sets of tags and compare serial numbers.
+ */
+
+ if (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);
+ }
+
+ if (existing_cunk <= 0) {
+ /*Hoosterman - how did this happen? */
+
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "yaffs tragedy: existing chunk < 0 in scan"
+ );
+
+ }
+
+ /* 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
+ * 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 (existing_cunk == 0)
+ in->n_data_chunks++;
+
+ yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk);
+
+ return YAFFS_OK;
+}
+
static void yaffs_soft_del_chunk(struct yaffs_dev *dev, int chunk)
{
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;
the_block = yaffs_get_block_info(dev, block_no);
}
-static void yaffs_soft_del_file(struct yaffs_obj *obj)
+static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj)
{
- if (obj->deleted &&
+ 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"
+ );
+ YBUG();
+ return;
+ }
+ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "tragedy: Trying to add an object to a non-directory"
+ );
+ YBUG();
+ }
+
+ if (obj->siblings.prev == NULL) {
+ /* Not initialised */
+ YBUG();
+ }
+
+ 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 int yaffs_change_obj_name(struct yaffs_obj *obj,
+ struct yaffs_obj *new_dir,
+ const YCHAR * new_name, int force, int shadows)
+{
+ 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"
+ );
+ YBUG();
+ }
+
+ /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
+ if (obj->my_dev->param.is_yaffs2)
+ unlink_op = (new_dir == obj->my_dev->unlinked_dir);
+ else
+ unlink_op = (new_dir == obj->my_dev->unlinked_dir
+ && obj->variant_type == YAFFS_OBJECT_TYPE_FILE);
+
+ del_op = (new_dir == obj->my_dev->del_dir);
+
+ 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 allowed.
+ * else only proceed if the new name does not exist and if we're putting
+ * it into a directory.
+ */
+ if ((unlink_op ||
+ del_op ||
+ force ||
+ (shadows > 0) ||
+ !existing_target) &&
+ new_dir->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
+ yaffs_set_obj_name(obj, new_name);
+ obj->dirty = 1;
+
+ 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 purposes. */
+ if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >=
+ 0)
+ return YAFFS_OK;
+ }
+
+ return YAFFS_FAIL;
+}
+
+/*------------------------ Short Operations Cache ----------------------------------------
+ * In many situations where there is no high level buffering a lot of
+ * reads might be short sequential reads, and a lot of writes may be short
+ * sequential writes. eg. scanning/writing a jpeg file.
+ * In these cases, a short read/write cache can provide a huge perfomance
+ * benefit with dumb-as-a-rock code.
+ * In Linux, the page cache provides read buffering and the short op cache
+ * provides write buffering.
+ *
+ * There are a limited number (~10) of cache chunks per device so that we don't
+ * need a very intelligent search.
+ */
+
+static int yaffs_obj_cache_dirty(struct yaffs_obj *obj)
+{
+ struct yaffs_dev *dev = obj->my_dev;
+ int i;
+ struct yaffs_cache *cache;
+ int n_caches = obj->my_dev->param.n_caches;
+
+ for (i = 0; i < n_caches; i++) {
+ cache = &dev->cache[i];
+ if (cache->object == obj && cache->dirty)
+ return 1;
+ }
+
+ return 0;
+}
+
+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 > 0) {
+ do {
+ cache = NULL;
+
+ /* Find the dirty cache for this object with the lowest chunk id. */
+ for (i = 0; i < n_caches; i++) {
+ if (dev->cache[i].object == obj &&
+ dev->cache[i].dirty) {
+ if (!cache
+ || dev->cache[i].chunk_id <
+ lowest) {
+ cache = &dev->cache[i];
+ lowest = cache->chunk_id;
+ }
+ }
+ }
+
+ 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 (cache)
+ /* Hoosterman, disk full while writing cache out. */
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "yaffs tragedy: no space during cache write");
+
+ }
+
+}
+
+/*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);
+
+}
+
+/* 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 struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev)
+{
+ struct yaffs_cache *cache;
+ struct yaffs_obj *the_obj;
+ int usage;
+ int i;
+ int pushout;
+
+ if (dev->param.n_caches > 0) {
+ /* Try find a non-dirty one... */
+
+ cache = yaffs_grab_chunk_worker(dev);
+
+ if (!cache) {
+ /* They were all dirty, find the last recently used object and flush
+ * its cache, then find again.
+ * NB what's here is not very accurate, we actually flush the object
+ * the last recently used page.
+ */
+
+ /* With locking we can't assume we can use entry zero */
+
+ the_obj = NULL;
+ usage = -1;
+ cache = NULL;
+ pushout = -1;
+
+ 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 (!cache || cache->dirty) {
+ /* Flush and try again */
+ yaffs_flush_file_cache(the_obj);
+ cache = yaffs_grab_chunk_worker(dev);
+ }
+
+ }
+ return cache;
+ } else {
+ return NULL;
+ }
+}
+
+/* Find a cached chunk */
+static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj,
+ int chunk_id)
+{
+ struct yaffs_dev *dev = obj->my_dev;
+ int i;
+ if (dev->param.n_caches > 0) {
+ for (i = 0; i < dev->param.n_caches; i++) {
+ if (dev->cache[i].object == obj &&
+ dev->cache[i].chunk_id == chunk_id) {
+ dev->cache_hits++;
+
+ 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)
+{
+
+ 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;
+
+ dev->cache_last_use = 0;
+ }
+
+ dev->cache_last_use++;
+
+ cache->last_use = dev->cache_last_use;
+
+ if (is_write)
+ cache->dirty = 1;
+ }
+}
+
+/* Invalidate a single cache page.
+ * Do this when a whole page gets written,
+ * ie the short cache for this page is no longer valid.
+ */
+static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object, int chunk_id)
+{
+ if (object->my_dev->param.n_caches > 0) {
+ struct yaffs_cache *cache =
+ yaffs_find_chunk_cache(object, chunk_id);
+
+ if (cache)
+ cache->object = NULL;
+ }
+}
+
+/* Invalidate all the cache pages associated with this object
+ * Do this whenever ther file is deleted or resized.
+ */
+static void yaffs_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(struct yaffs_obj *obj)
+{
+ int bucket;
+ struct yaffs_dev *dev = obj->my_dev;
+
+ /* If it is still linked into the bucket list, free from the list */
+ if (!list_empty(&obj->hash_link)) {
+ list_del_init(&obj->hash_link);
+ bucket = yaffs_hash_fn(obj->obj_id);
+ dev->obj_bucket[bucket].count--;
+ }
+}
+
+/* FreeObject frees up a Object and puts it back on the free list */
+static void yaffs_free_obj(struct yaffs_obj *obj)
+{
+ struct yaffs_dev *dev = obj->my_dev;
+
+ yaffs_trace(YAFFS_TRACE_OS, "FreeObject %p inode %p",
+ obj, obj->my_inode);
+
+ if (!obj)
+ YBUG();
+ if (obj->parent)
+ YBUG();
+ if (!list_empty(&obj->siblings))
+ YBUG();
+
+ if (obj->my_inode) {
+ /* We're still hooked up to a cached inode.
+ * Don't delete now, but mark for later deletion
+ */
+ obj->defered_free = 1;
+ return;
+ }
+
+ yaffs_unhash_obj(obj);
+
+ yaffs_free_raw_obj(dev, obj);
+ dev->n_obj--;
+ dev->checkpoint_blocks_required = 0; /* force recalculation */
+}
+
+void yaffs_handle_defered_free(struct yaffs_obj *obj)
+{
+ if (obj->defered_free)
+ yaffs_free_obj(obj);
+}
+
+static int yaffs_generic_obj_del(struct yaffs_obj *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;
+
+}
+
+static void yaffs_soft_del_file(struct yaffs_obj *obj)
+{
+ if (obj->deleted &&
obj->variant_type == YAFFS_OBJECT_TYPE_FILE && !obj->soft_del) {
if (obj->n_data_chunks <= 0) {
- /* Empty file with no duplicate object headers, just delete it immediately */
+ /* 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_trace(YAFFS_TRACE_TRACING,
+ "yaffs: Deleting empty file %d",
+ obj->obj_id);
yaffs_generic_obj_del(obj);
} else {
yaffs_soft_del_worker(obj,
file_struct->top_level--;
yaffs_free_tnode(dev, tn);
} else {
- done = 1;
- }
- }
- }
-
- return YAFFS_OK;
-}
-
-/*-------------------- End of File Structure functions.-------------------*/
-
-/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
-static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev)
-{
- struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev);
-
- if (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 struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev,
- int number, u32 mode)
-{
-
- struct yaffs_obj *obj =
- yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
- if (obj) {
- obj->fake = 1; /* it is fake so it might have no NAND presence... */
- obj->rename_allowed = 0; /* ... and we're not allowed to rename it... */
- obj->unlink_allowed = 0; /* ... or unlink it */
- obj->deleted = 0;
- obj->unlinked = 0;
- obj->yst_mode = mode;
- obj->my_dev = dev;
- obj->hdr_chunk = 0; /* Not a valid chunk. */
- }
-
- return obj;
-
-}
-
-static void yaffs_unhash_obj(struct yaffs_obj *obj)
-{
- int bucket;
- struct yaffs_dev *dev = obj->my_dev;
-
- /* If it is still linked into the bucket list, free from the list */
- if (!list_empty(&obj->hash_link)) {
- list_del_init(&obj->hash_link);
- bucket = yaffs_hash_fn(obj->obj_id);
- dev->obj_bucket[bucket].count--;
- }
-}
-
-/* FreeObject frees up a Object and puts it back on the free list */
-static void yaffs_free_obj(struct yaffs_obj *obj)
-{
- struct yaffs_dev *dev = obj->my_dev;
-
- T(YAFFS_TRACE_OS,
- (TSTR("FreeObject %p inode %p" TENDSTR), obj, obj->my_inode));
-
- if (!obj)
- YBUG();
- if (obj->parent)
- YBUG();
- if (!list_empty(&obj->siblings))
- YBUG();
-
- if (obj->my_inode) {
- /* We're still hooked up to a cached inode.
- * Don't delete now, but mark for later deletion
- */
- obj->defered_free = 1;
- return;
+ done = 1;
+ }
+ }
}
- yaffs_unhash_obj(obj);
-
- yaffs_free_raw_obj(dev, obj);
- dev->n_obj--;
- dev->checkpoint_blocks_required = 0; /* force recalculation */
+ return YAFFS_OK;
}
-void yaffs_handle_defered_free(struct yaffs_obj *obj)
-{
- if (obj->defered_free)
- yaffs_free_obj(obj);
-}
+/*-------------------- End of File Structure functions.-------------------*/
-static void yaffs_init_tnodes_and_objs(struct yaffs_dev *dev)
+/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
+static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev)
{
- int i;
+ struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev);
- dev->n_obj = 0;
- dev->n_tnodes = 0;
+ if (obj) {
+ dev->n_obj++;
- yaffs_init_raw_tnodes_and_objs(dev);
+ /* Now sweeten it up... */
- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
- INIT_LIST_HEAD(&dev->obj_bucket[i].list);
- dev->obj_bucket[i].count = 0;
+ 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(struct yaffs_dev *dev)
return the_obj;
}
+static struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev,
+ int number, u32 mode)
+{
+
+ struct yaffs_obj *obj =
+ yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
+ if (obj) {
+ obj->fake = 1; /* it is fake so it might have no NAND presence... */
+ obj->rename_allowed = 0; /* ... and we're not allowed to rename it... */
+ obj->unlink_allowed = 0; /* ... or unlink it */
+ obj->deleted = 0;
+ obj->unlinked = 0;
+ obj->yst_mode = mode;
+ obj->my_dev = dev;
+ obj->hdr_chunk = 0; /* Not a valid chunk. */
+ }
+
+ return 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;
+ }
+}
+
struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev,
int number,
enum yaffs_obj_type type)
if (!str)
str = _Y("");
- len = yaffs_strnlen(str, YAFFS_MAX_ALIAS_LENGTH);
- new_str = YMALLOC((len + 1) * sizeof(YCHAR));
+ len = strnlen(str, YAFFS_MAX_ALIAS_LENGTH);
+ new_str = kmalloc((len + 1) * sizeof(YCHAR), GFP_NOFS);
if (new_str) {
- yaffs_strncpy(new_str, str, len);
+ strncpy(new_str, str, len);
new_str[len] = 0;
}
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.
if (!in) {
if (str)
- YFREE(str);
+ kfree(str);
return NULL;
}
}
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;
- }
-
- yaffs_update_parent(parent);
- }
-
- return in;
-}
-
-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);
-}
-
-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);
-}
-
-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);
-}
-
-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.*/
-struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name,
- struct yaffs_obj *equiv_obj)
-{
- /* Get the real object in case we were fed a hard link as an equivalent object */
- equiv_obj = yaffs_get_equivalent_obj(equiv_obj);
-
- 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(struct yaffs_obj *obj,
- struct yaffs_obj *new_dir,
- const YCHAR * new_name, int force, int shadows)
-{
- 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) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("tragedy: yaffs_change_obj_name: new_dir is not a directory"
- TENDSTR)));
- YBUG();
- }
-
- /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
- if (obj->my_dev->param.is_yaffs2)
- unlink_op = (new_dir == obj->my_dev->unlinked_dir);
- else
- unlink_op = (new_dir == obj->my_dev->unlinked_dir
- && obj->variant_type == YAFFS_OBJECT_TYPE_FILE);
-
- del_op = (new_dir == obj->my_dev->del_dir);
-
- 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 allowed.
- * else only proceed if the new name does not exist and if we're putting
- * it into a directory.
- */
- if ((unlink_op ||
- del_op ||
- force ||
- (shadows > 0) ||
- !existing_target) &&
- new_dir->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
- yaffs_set_obj_name(obj, new_name);
- obj->dirty = 1;
-
- yaffs_add_obj_to_dir(new_dir, obj);
-
- if (unlink_op)
- obj->unlinked = 1;
+ /* Could not create the object header, fail the creation */
+ yaffs_del_obj(in);
+ in = NULL;
+ }
- /* If it is a deletion then we mark it as a shrink for gc purposes. */
- if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >=
- 0)
- return YAFFS_OK;
+ yaffs_update_parent(parent);
}
- return YAFFS_FAIL;
+ return in;
}
-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 *yaffs_create_file(struct yaffs_obj *parent,
+ const YCHAR * name, u32 mode, u32 uid,
+ u32 gid)
{
- 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)
- YBUG();
- if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
- YBUG();
-
- 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 && yaffs_strcmp(old_name, new_name) == 0)
- force = 1;
-#endif
+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
+ uid, gid, NULL, NULL, 0);
+}
- if (yaffs_strnlen(new_name, YAFFS_MAX_NAME_LENGTH + 1) >
- YAFFS_MAX_NAME_LENGTH)
- /* ENAMETOOLONG */
- return YAFFS_FAIL;
+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);
+}
- obj = yaffs_find_by_name(old_dir, old_name);
+struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent,
+ const YCHAR * name, u32 mode, u32 uid,
+ u32 gid, u32 rdev)
+{
+ return yaffs_create_obj(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
+ uid, gid, NULL, NULL, rdev);
+}
- if (obj && obj->rename_allowed) {
+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);
+}
- /* Now do the handling for an existing target, if there is one */
+/* yaffs_link_obj returns the object id of the equivalent object.*/
+struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name,
+ struct yaffs_obj *equiv_obj)
+{
+ /* Get the real object in case we were fed a hard link as an equivalent object */
+ equiv_obj = yaffs_get_equivalent_obj(equiv_obj);
- existing_target = yaffs_find_by_name(new_dir, new_name);
- if (existing_target &&
- existing_target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY
- && !list_empty(&existing_target->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 (existing_target && existing_target != obj) {
- /* Nuke the target first, using shadowing,
- * but only if it isn't the same object.
- *
- * Note we must disable gc otherwise it can mess up the shadowing.
- *
- */
- dev->gc_disable = 1;
- yaffs_change_obj_name(obj, new_dir, new_name, force,
- existing_target->obj_id);
- existing_target->is_shadowed = 1;
- yaffs_unlink_obj(existing_target);
- dev->gc_disable = 0;
- }
+ if (yaffs_create_obj
+ (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
+ equiv_obj, NULL, 0)) {
+ return equiv_obj;
+ } else {
+ return NULL;
+ }
- result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0);
+}
- yaffs_update_parent(old_dir);
- if (new_dir != old_dir)
- yaffs_update_parent(new_dir);
- return result;
- }
- return YAFFS_FAIL;
-}
/*------------------------- Block Management and Page Allocation ----------------*/
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(n_blocks * sizeof(struct yaffs_block_info));
+ dev->block_info =
+ kmalloc(n_blocks * sizeof(struct yaffs_block_info), GFP_NOFS);
if (!dev->block_info) {
dev->block_info =
- YMALLOC_ALT(n_blocks * sizeof(struct yaffs_block_info));
+ vmalloc(n_blocks * sizeof(struct yaffs_block_info));
dev->block_info_alt = 1;
} 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 * n_blocks);
+ /* 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 =
- YMALLOC_ALT(dev->chunk_bit_stride * n_blocks);
+ vmalloc(dev->chunk_bit_stride * n_blocks);
dev->chunk_bits_alt = 1;
} else {
dev->chunk_bits_alt = 0;
static void yaffs_deinit_blocks(struct yaffs_dev *dev)
{
if (dev->block_info_alt && dev->block_info)
- YFREE_ALT(dev->block_info);
+ vfree(dev->block_info);
else if (dev->block_info)
- YFREE(dev->block_info);
+ kfree(dev->block_info);
dev->block_info_alt = 0;
dev->block_info = NULL;
if (dev->chunk_bits_alt && dev->chunk_bits)
- YFREE_ALT(dev->chunk_bits);
+ vfree(dev->chunk_bits);
else if (dev->chunk_bits)
- YFREE(dev->chunk_bits);
+ kfree(dev->chunk_bits);
dev->chunk_bits_alt = 0;
dev->chunk_bits = NULL;
}
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;
-
- /* 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" : ""));
-
- 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)
- 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) {
- dev->gc_dirtiest = 0;
- dev->gc_pages_in_use = 0;
- }
-
- if (!bi->needs_retiring) {
- yaffs2_checkpt_invalidate(dev);
- erased_ok = yaffs_erase_block(dev, block_no);
- if (!erased_ok) {
- dev->n_erase_failures++;
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("**>> Erasure failed %d" TENDSTR), block_no));
- }
- }
-
- if (erased_ok &&
- ((yaffs_trace_mask & YAFFS_TRACE_ERASE)
- || !yaffs_skip_verification(dev))) {
- int i;
- for (i = 0; i < dev->param.chunks_per_block; i++) {
- if (!yaffs_check_chunk_erased
- (dev, block_no * dev->param.chunks_per_block + i)) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- (">>Block %d erasure supposedly OK, but chunk %d not erased"
- TENDSTR), block_no, i));
- }
- }
- }
-
- if (erased_ok) {
- /* Clean it up... */
- bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
- bi->seq_number = 0;
- dev->n_erased_blocks++;
- bi->pages_in_use = 0;
- bi->soft_del_pages = 0;
- bi->has_shrink_hdr = 0;
- bi->skip_erased_check = 1; /* This is clean, so no need to check */
- bi->gc_prioritise = 0;
- yaffs_clear_chunk_bits(dev, block_no);
-
- T(YAFFS_TRACE_ERASE,
- (TSTR("Erased block %d" TENDSTR), block_no));
- } else {
- dev->n_free_chunks -= dev->param.chunks_per_block; /* We lost a block of free space */
-
- yaffs_retire_block(dev, block_no);
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
- (TSTR("**>> Block %d retired" TENDSTR), block_no));
- }
-}
-
-static int yaffs_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
- */
- 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;
- }
- }
-
- 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(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_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)) {
- /* 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)));
- }
-
- /* 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;
+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, block_no);
- return ret_val;
- }
+ int erased_ok = 0;
- T(YAFFS_TRACE_ERROR,
- (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
+ /* If the block is still healthy erase it and mark as clean.
+ * If the block has had a data failure, then retire it.
+ */
- return -1;
-}
+ 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" : "");
-static int yaffs_get_erased_chunks(struct yaffs_dev *dev)
-{
- int n;
+ yaffs2_clear_oldest_dirty_seq(dev, bi);
- n = dev->n_erased_blocks * dev->param.chunks_per_block;
+ bi->block_state = YAFFS_BLOCK_STATE_DIRTY;
- if (dev->alloc_block > 0)
- n += (dev->param.chunks_per_block - dev->alloc_page);
+ /* If this is the block being garbage collected then stop gc'ing this block */
+ if (block_no == dev->gc_block)
+ dev->gc_block = 0;
- return n;
+ /* If this block is currently the best candidate for gc then drop as a candidate */
+ if (block_no == dev->gc_dirtiest) {
+ dev->gc_dirtiest = 0;
+ dev->gc_pages_in_use = 0;
+ }
-}
+ if (!bi->needs_retiring) {
+ yaffs2_checkpt_invalidate(dev);
+ erased_ok = yaffs_erase_block(dev, block_no);
+ if (!erased_ok) {
+ dev->n_erase_failures++;
+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ "**>> Erasure failed %d", block_no);
+ }
+ }
-/*
- * yaffs_skip_rest_of_block() skips over the rest of the allocation block
- * if we don't want to write to it.
- */
-void yaffs_skip_rest_of_block(struct yaffs_dev *dev)
-{
- if (dev->alloc_block > 0) {
- struct yaffs_block_info *bi =
- yaffs_get_block_info(dev, dev->alloc_block);
- if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) {
- bi->block_state = YAFFS_BLOCK_STATE_FULL;
- dev->alloc_block = -1;
+ if (erased_ok &&
+ ((yaffs_trace_mask & YAFFS_TRACE_ERASE)
+ || !yaffs_skip_verification(dev))) {
+ int i;
+ for (i = 0; i < dev->param.chunks_per_block; i++) {
+ if (!yaffs_check_chunk_erased
+ (dev, block_no * dev->param.chunks_per_block + i)) {
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ ">>Block %d erasure supposedly OK, but chunk %d not erased",
+ block_no, i);
+ }
}
}
+
+ if (erased_ok) {
+ /* Clean it up... */
+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
+ bi->seq_number = 0;
+ dev->n_erased_blocks++;
+ bi->pages_in_use = 0;
+ bi->soft_del_pages = 0;
+ bi->has_shrink_hdr = 0;
+ bi->skip_erased_check = 1; /* Clean, so no need to check */
+ bi->gc_prioritise = 0;
+ yaffs_clear_chunk_bits(dev, block_no);
+
+ yaffs_trace(YAFFS_TRACE_ERASE,
+ "Erased block %d", block_no);
+ } else {
+ /* We lost a block of free space */
+ dev->n_free_chunks -= dev->param.chunks_per_block;
+ yaffs_retire_block(dev, block_no);
+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ "**>> Block %d retired", block_no);
+ }
}
+
+
static int yaffs_gc_block(struct yaffs_dev *dev, int block, int whole_block)
{
int old_chunk;
is_checkpt_block = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT);
- T(YAFFS_TRACE_TRACING,
- (TSTR
- ("Collecting block %d, in use %d, shrink %d, whole_block %d"
- TENDSTR), block, bi->pages_in_use, bi->has_shrink_hdr,
- whole_block));
+ 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); */
dev->gc_disable = 1;
if (is_checkpt_block || !yaffs_still_some_chunks(dev, block)) {
- T(YAFFS_TRACE_TRACING,
- (TSTR
- ("Collecting block %d that has no chunks in use" TENDSTR),
- block));
+ yaffs_trace(YAFFS_TRACE_TRACING,
+ "Collecting block %d that has no chunks in use",
+ block);
yaffs_block_became_dirty(dev, block);
} else {
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));
+ 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);
if (object && !yaffs_skip_verification(dev)) {
if (tags.chunk_id == 0)
NULL);
if (old_chunk != matching_chunk)
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("gc: page in gc mismatch: %d %d %d %d"
- TENDSTR), old_chunk,
- matching_chunk, tags.obj_id,
- tags.chunk_id));
+ 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) {
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("page %d in gc has no object: %d %d %d "
- TENDSTR), old_chunk,
- tags.obj_id, tags.chunk_id,
- tags.n_bytes));
+ yaffs_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->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--;
}
}
chunks_after = yaffs_get_erased_chunks(dev);
- if (chunks_before >= chunks_after) {
- T(YAFFS_TRACE_GC,
- (TSTR
- ("gc did not increase free chunks before %d after %d"
- TENDSTR), chunks_before, chunks_after));
- }
+ 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;
}
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));
+ yaffs_trace(YAFFS_TRACE_GC,
+ "GC Selected block %d with %d free, prioritised:%d",
+ selected,
+ dev->param.chunks_per_block - dev->gc_pages_in_use,
+ prioritised);
dev->n_gc_blocks++;
if (background)
dev->refresh_skip--;
} else {
dev->gc_not_done++;
- T(YAFFS_TRACE_GC,
- (TSTR
- ("GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s"
- TENDSTR), dev->gc_block_finder, dev->gc_not_done, threshold,
- dev->gc_dirtiest, dev->gc_pages_in_use,
- dev->oldest_dirty_block, background ? " bg" : ""));
+ 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;
if (!aggressive)
dev->passive_gc_count++;
- T(YAFFS_TRACE_GC,
- (TSTR
- ("yaffs: GC n_erased_blocks %d aggressive %d"
- TENDSTR), dev->n_erased_blocks, aggressive));
-
- gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive);
- }
-
- if (dev->n_erased_blocks < (dev->param.n_reserved_blocks)
- && dev->gc_block > 0) {
- T(YAFFS_TRACE_GC,
- (TSTR
- ("yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d"
- TENDSTR), dev->n_erased_blocks, max_tries,
- dev->gc_block));
- }
- } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) &&
- (dev->gc_block > 0) && (max_tries < 2));
-
- return aggressive ? gc_ok : YAFFS_OK;
-}
-
-/*
- * yaffs_bg_gc()
- * Garbage collects. Intended to be called from a background thread.
- * Returns non-zero if at least half the free chunks are erased.
- */
-int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency)
-{
- int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block;
-
- T(YAFFS_TRACE_BACKGROUND, (TSTR("Background gc %u" TENDSTR), urgency));
-
- yaffs_check_gc(dev, 1);
- return erased_chunks > dev->n_free_chunks / 2;
-}
-
-/*------------------------- TAGS --------------------------------*/
-
-static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id,
- int chunk_obj)
-{
- return (tags->chunk_id == chunk_obj &&
- tags->obj_id == obj_id && !tags->is_deleted) ? 1 : 0;
-
-}
-
-/*-------------------- Data file manipulation -----------------*/
-
-static int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk,
- struct yaffs_ext_tags *tags)
-{
- /*Get the Tnode, then get the level 0 offset chunk offset */
- struct yaffs_tnode *tn;
- int the_chunk = -1;
- struct yaffs_ext_tags local_tags;
- int ret_val = -1;
-
- struct yaffs_dev *dev = in->my_dev;
-
- if (!tags) {
- /* Passed a NULL, so use our own tags space */
- tags = &local_tags;
- }
-
- tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
-
- if (tn) {
- the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
-
- ret_val =
- yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
- inode_chunk);
- }
- return ret_val;
-}
-
-static int yaffs_find_del_file_chunk(struct yaffs_obj *in, int inode_chunk,
- struct yaffs_ext_tags *tags)
-{
- /* Get the Tnode, then get the level 0 offset chunk offset */
- struct yaffs_tnode *tn;
- int the_chunk = -1;
- struct yaffs_ext_tags local_tags;
-
- struct yaffs_dev *dev = in->my_dev;
- int ret_val = -1;
-
- if (!tags) {
- /* Passed a NULL, so use our own tags space */
- tags = &local_tags;
- }
-
- tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk);
-
- if (tn) {
-
- the_chunk = yaffs_get_group_base(dev, tn, inode_chunk);
-
- ret_val =
- yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id,
- inode_chunk);
-
- /* 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) {
- 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;
-
- existing_cunk = yaffs_get_group_base(dev, tn, inode_chunk);
-
- if (in_scan != 0) {
- /* If we're scanning then we need to test for duplicates
- * NB This does not need to be efficient since it should only ever
- * happen when the power fails during a write, then only one
- * chunk should ever be affected.
- *
- * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
- * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
- */
-
- if (existing_cunk > 0) {
- /* NB Right now existing chunk will not be real chunk_id if the chunk group size > 1
- * thus we have to do a FindChunkInFile to get the real chunk id.
- *
- * We have a duplicate now we need to decide which one to use:
- *
- * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
- * Forward scanning YAFFS2: The new one is what we use, dump the old one.
- * YAFFS1: Get both sets of tags and compare serial numbers.
- */
-
- if (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);
- }
-
- if (existing_cunk <= 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) {
- new_serial = new_tags.serial_number;
- existing_serial = existing_tags.serial_number;
- }
+ yaffs_trace(YAFFS_TRACE_GC,
+ "yaffs: GC n_erased_blocks %d aggressive %d",
+ dev->n_erased_blocks, aggressive);
- if ((in_scan > 0) &&
- (existing_cunk <= 0 ||
- ((existing_serial + 1) & 3) == new_serial)) {
- /* Forward scanning.
- * Use new
- * Delete the old one and drop through to update the tnode
- */
- yaffs_chunk_del(dev, existing_cunk, 1,
- __LINE__);
- } else {
- /* Backward scanning or we want to use the existing one
- * Use existing.
- * Delete the new one and return early so that the tnode isn't changed
- */
- yaffs_chunk_del(dev, nand_chunk, 1, __LINE__);
- return YAFFS_OK;
- }
+ gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive);
}
- }
+ if (dev->n_erased_blocks < (dev->param.n_reserved_blocks)
+ && dev->gc_block > 0) {
+ yaffs_trace(YAFFS_TRACE_GC,
+ "yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d",
+ dev->n_erased_blocks, max_tries,
+ dev->gc_block);
+ }
+ } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) &&
+ (dev->gc_block > 0) && (max_tries < 2));
- if (existing_cunk == 0)
- in->n_data_chunks++;
+ return aggressive ? gc_ok : YAFFS_OK;
+}
- yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk);
+/*
+ * yaffs_bg_gc()
+ * Garbage collects. Intended to be called from a background thread.
+ * Returns non-zero if at least half the free chunks are erased.
+ */
+int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency)
+{
+ int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block;
- return YAFFS_OK;
+ yaffs_trace(YAFFS_TRACE_BACKGROUND, "Background gc %u", urgency);
+
+ yaffs_check_gc(dev, 1);
+ return erased_chunks > dev->n_free_chunks / 2;
}
+/*-------------------- Data file manipulation -----------------*/
+
static int yaffs_rd_data_obj(struct yaffs_obj *in, int inode_chunk, u8 * buffer)
{
int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL);
return 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;
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) {
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));
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "Writing %d bytes to chunk!!!!!!!!!",
+ n_bytes);
YBUG();
}
- new_chunk_id =
- yaffs_write_new_chunk(dev, buffer, &new_tags, use_reserve);
+ 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 (prev_chunk_id > 0)
+ yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__);
+
+ yaffs_verify_file_sane(in);
+ }
+ return new_chunk_id;
+
+}
+
+
+
+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;
+
+ 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(struct yaffs_obj *obj, char *buffer,
+ struct yaffs_xattr_mod *xmod)
+{
+ int retval = 0;
+ int x_offs = sizeof(struct yaffs_obj_hdr);
+ struct yaffs_dev *dev = obj->my_dev;
+ int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr);
+
+ char *x_buffer = buffer + x_offs;
+
+ if (xmod->set)
+ retval =
+ nval_set(x_buffer, x_size, xmod->name, xmod->data,
+ xmod->size, xmod->flags);
+ else
+ retval = nval_del(x_buffer, x_size, xmod->name);
+
+ obj->has_xattr = nval_hasvalues(x_buffer, x_size);
+ obj->xattr_known = 1;
+
+ xmod->result = retval;
+
+ return retval;
+}
+
+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;
+
+ 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(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);
+}
+
+int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name)
+{
+ return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 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);
+}
+
+int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size)
+{
+ return yaffs_do_xattrib_fetch(obj, NULL, buffer, size);
+}
+
+static void yaffs_check_obj_details_loaded(struct yaffs_obj *in)
+{
+ u8 *chunk_data;
+ struct yaffs_obj_hdr *oh;
+ struct yaffs_dev *dev;
+ struct yaffs_ext_tags tags;
+ int result;
+ int alloc_failed = 0;
+
+ if (!in)
+ return;
+
+ dev = in->my_dev;
+
+ if (in->lazy_loaded && in->hdr_chunk > 0) {
+ in->lazy_loaded = 0;
+ chunk_data = yaffs_get_temp_buffer(dev, __LINE__);
+
+ result =
+ yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, chunk_data,
+ &tags);
+ oh = (struct yaffs_obj_hdr *)chunk_data;
+
+ in->yst_mode = oh->yst_mode;
+ yaffs_load_attribs(in, oh);
+ yaffs_set_obj_name_from_oh(in, oh);
+
+ if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
+ in->variant.symlink_variant.alias =
+ yaffs_clone_str(oh->alias);
+ if (!in->variant.symlink_variant.alias)
+ alloc_failed = 1; /* Not returned to caller */
+ }
+
+ yaffs_release_temp_buffer(dev, chunk_data, __LINE__);
+ }
+}
+
+static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR * name,
+ const YCHAR * oh_name, int buff_size)
+{
+#ifdef CONFIG_YAFFS_AUTO_UNICODE
+ if (dev->param.auto_unicode) {
+ if (*oh_name) {
+ /* It is an ASCII name, 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
+ {
+#endif
+ strncpy(name, oh_name, buff_size - 1);
+ }
+}
+
+static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR * oh_name,
+ const YCHAR * name)
+{
+#ifdef CONFIG_YAFFS_AUTO_UNICODE
+
+ int is_ascii;
+ YCHAR *w;
+
+ if (dev->param.auto_unicode) {
- if (new_chunk_id > 0) {
- yaffs_put_chunk_in_file(in, inode_chunk, new_chunk_id, 0);
+ is_ascii = 1;
+ w = name;
- if (prev_chunk_id > 0)
- yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__);
+ /* Figure out if the name will fit in ascii character set */
+ while (is_ascii && *w) {
+ if ((*w) & 0xff00)
+ is_ascii = 0;
+ w++;
+ }
- yaffs_verify_file_sane(in);
- }
- return new_chunk_id;
+ if (is_ascii) {
+ /* It is an ASCII name, so do a unicode to ascii conversion */
+ char *ascii_oh_name = (char *)oh_name;
+ int n = YAFFS_MAX_NAME_LENGTH - 1;
+ while (n > 0 && *name) {
+ *ascii_oh_name = *name;
+ name++;
+ ascii_oh_name++;
+ n--;
+ }
+ } else {
+ /* It is a unicode name, so save starting at the second YCHAR */
+ *oh_name = 0;
+ strncpy(oh_name + 1, name,
+ YAFFS_MAX_NAME_LENGTH - 2);
+ }
+ } else {
+#else
+ {
+#endif
+ strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1);
+ }
}
struct yaffs_obj_hdr *oh = NULL;
- yaffs_strcpy(old_name, _Y("silly old name"));
+ strcpy(old_name, _Y("silly old name"));
- if (!in->fake || in == dev->root_dir || /* The root_dir should also be saved */
+ if (!in->fake || in == dev->root_dir ||
force || xmod) {
yaffs_check_gc(dev, 0);
alias = in->variant.symlink_variant.alias;
if (!alias)
alias = _Y("no alias");
- yaffs_strncpy(oh->alias, alias, YAFFS_MAX_ALIAS_LENGTH);
+ strncpy(oh->alias, alias, YAFFS_MAX_ALIAS_LENGTH);
oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
break;
}
}
- ret_val = new_chunk_id;
-
- }
-
- if (buffer)
- yaffs_release_temp_buffer(dev, buffer, __LINE__);
-
- return ret_val;
-}
-
-/*------------------------ Short Operations Cache ----------------------------------------
- * In many situations where there is no high level buffering a lot of
- * reads might be short sequential reads, and a lot of writes may be short
- * sequential writes. eg. scanning/writing a jpeg file.
- * In these cases, a short read/write cache can provide a huge perfomance
- * benefit with dumb-as-a-rock code.
- * In Linux, the page cache provides read buffering and the short op cache
- * provides write buffering.
- *
- * There are a limited number (~10) of cache chunks per device so that we don't
- * need a very intelligent search.
- */
-
-static int yaffs_obj_cache_dirty(struct yaffs_obj *obj)
-{
- struct yaffs_dev *dev = obj->my_dev;
- int i;
- struct yaffs_cache *cache;
- int n_caches = obj->my_dev->param.n_caches;
-
- for (i = 0; i < n_caches; i++) {
- cache = &dev->cache[i];
- if (cache->object == obj && cache->dirty)
- return 1;
- }
-
- return 0;
-}
-
-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 > 0) {
- do {
- cache = NULL;
-
- /* Find the dirty cache for this object with the lowest chunk id. */
- for (i = 0; i < n_caches; i++) {
- if (dev->cache[i].object == obj &&
- dev->cache[i].dirty) {
- if (!cache
- || dev->cache[i].chunk_id <
- lowest) {
- cache = &dev->cache[i];
- lowest = cache->chunk_id;
- }
- }
- }
-
- 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 (cache) {
- /* Hoosterman, disk full while writing cache out. */
- T(YAFFS_TRACE_ERROR,
- (TSTR
- ("yaffs tragedy: no space during cache write"
- TENDSTR)));
-
- }
- }
-
-}
-
-/*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);
-
-}
-
-/* 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 struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev)
-{
- struct yaffs_cache *cache;
- struct yaffs_obj *the_obj;
- int usage;
- int i;
- int pushout;
-
- if (dev->param.n_caches > 0) {
- /* Try find a non-dirty one... */
-
- cache = yaffs_grab_chunk_worker(dev);
-
- if (!cache) {
- /* They were all dirty, find the last recently used object and flush
- * its cache, then find again.
- * NB what's here is not very accurate, we actually flush the object
- * the last recently used page.
- */
-
- /* With locking we can't assume we can use entry zero */
-
- the_obj = NULL;
- usage = -1;
- cache = NULL;
- pushout = -1;
-
- 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 (!cache || cache->dirty) {
- /* Flush and try again */
- yaffs_flush_file_cache(the_obj);
- cache = yaffs_grab_chunk_worker(dev);
- }
-
- }
- return cache;
- } else {
- return NULL;
- }
-}
-
-/* Find a cached chunk */
-static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj,
- int chunk_id)
-{
- struct yaffs_dev *dev = obj->my_dev;
- int i;
- if (dev->param.n_caches > 0) {
- for (i = 0; i < dev->param.n_caches; i++) {
- if (dev->cache[i].object == obj &&
- dev->cache[i].chunk_id == chunk_id) {
- dev->cache_hits++;
-
- 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)
-{
-
- 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;
-
- dev->cache_last_use = 0;
- }
-
- dev->cache_last_use++;
-
- cache->last_use = dev->cache_last_use;
-
- if (is_write)
- cache->dirty = 1;
- }
-}
-
-/* Invalidate a single cache page.
- * Do this when a whole page gets written,
- * ie the short cache for this page is no longer valid.
- */
-static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object, int chunk_id)
-{
- if (object->my_dev->param.n_caches > 0) {
- struct yaffs_cache *cache =
- yaffs_find_chunk_cache(object, chunk_id);
+ ret_val = new_chunk_id;
- if (cache)
- cache->object = NULL;
}
-}
-/* Invalidate all the cache pages associated with this object
- * Do this whenever ther file is deleted or resized.
- */
-static void yaffs_invalidate_whole_cache(struct yaffs_obj *in)
-{
- int i;
- struct yaffs_dev *dev = in->my_dev;
+ if (buffer)
+ yaffs_release_temp_buffer(dev, buffer, __LINE__);
- 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 ret_val;
}
/*--------------------- File read/write ------------------------
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));
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "AddrToChunk of offset %d gives chunk %d start %d",
+ (int)offset, chunk, start);
}
chunk++; /* File pos to chunk in file offset */
|| 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));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "Found daft chunk_id %d for %d",
+ chunk_id, i);
} else {
in->n_data_chunks--;
yaffs_chunk_del(dev, chunk_id, 1, __LINE__);
int last_chunk = 1 + new_full;
u8 *local_buffer = yaffs_get_temp_buffer(dev, __LINE__);
- /* Got to read and rewrite the last chunk with its new size and zero pad */
+ /* 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);
}
-static int yaffs_generic_obj_del(struct yaffs_obj *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.
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));
+ 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)
}
}
-static int yaffs_is_non_empty_dir(struct yaffs_obj *obj)
+int yaffs_is_non_empty_dir(struct yaffs_obj *obj)
{
- return (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) &&
- !(list_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(struct yaffs_obj *obj)
static int yaffs_del_symlink(struct yaffs_obj *in)
{
if (in->variant.symlink_variant.alias)
- YFREE(in->variant.symlink_variant.alias);
+ kfree(in->variant.symlink_variant.alias);
in->variant.symlink_variant.alias = NULL;
return yaffs_generic_obj_del(in);
break;
case YAFFS_OBJECT_TYPE_DIRECTORY:
if (!list_empty(&obj->variant.dir_variant.dirty)) {
- T(YAFFS_TRACE_BACKGROUND,
- (TSTR
- ("Remove object %d from dirty directories" TENDSTR),
- obj->obj_id));
+ 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);
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)
+ YBUG();
+ if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
+
+ 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 do the handling for an existing target, if there is one */
+
+ existing_target = yaffs_find_by_name(new_dir, new_name);
+ if (yaffs_is_non_empty_dir(existing_target)){
+ return YAFFS_FAIL; /* ENOTEMPTY */
+ } else if (existing_target && existing_target != obj) {
+ /* Nuke the target first, using shadowing,
+ * but only if it isn't the same object.
+ *
+ * Note we must disable gc otherwise it can mess up the shadowing.
+ *
+ */
+ dev->gc_disable = 1;
+ yaffs_change_obj_name(obj, new_dir, new_name, force,
+ existing_target->obj_id);
+ existing_target->is_shadowed = 1;
+ yaffs_unlink_obj(existing_target);
+ dev->gc_disable = 0;
+ }
+
+ 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(struct yaffs_dev *dev, int obj_id,
hanging = 1;
}
if (hanging) {
- T(YAFFS_TRACE_SCAN,
- (TSTR
- ("Hanging object %d moved to lost and found"
- TENDSTR), obj->obj_id));
+ 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(struct yaffs_obj *dir)
-{
- struct yaffs_obj *obj;
- struct list_head *lh;
- struct list_head *n;
-
- if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
- YBUG();
-
- list_for_each_safe(lh, n, &dir->variant.dir_variant.children) {
- if (lh) {
- obj = list_entry(lh, struct yaffs_obj, 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(struct yaffs_dev *dev)
-{
- yaffs_del_dir_contents(dev->lost_n_found);
-}
-
-static void yaffs_check_obj_details_loaded(struct yaffs_obj *in)
-{
- u8 *chunk_data;
- struct yaffs_obj_hdr *oh;
- struct yaffs_dev *dev;
- struct yaffs_ext_tags tags;
- int result;
- int alloc_failed = 0;
-
- if (!in)
- return;
-
- dev = in->my_dev;
-
- if (in->lazy_loaded && in->hdr_chunk > 0) {
- in->lazy_loaded = 0;
- chunk_data = yaffs_get_temp_buffer(dev, __LINE__);
-
- result =
- yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, chunk_data,
- &tags);
- oh = (struct yaffs_obj_hdr *)chunk_data;
-
- in->yst_mode = oh->yst_mode;
- yaffs_load_attribs(in, oh);
- yaffs_set_obj_name_from_oh(in, oh);
-
- if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
- in->variant.symlink_variant.alias =
- yaffs_clone_str(oh->alias);
- if (!in->variant.symlink_variant.alias)
- alloc_failed = 1; /* Not returned to caller */
- }
-
- yaffs_release_temp_buffer(dev, chunk_data, __LINE__);
- }
-}
-
-/*------------------------------ Directory Functions ----------------------------- */
-
-/*
- *yaffs_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);
- 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);
- }
-}
-
-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;
-
- T(YAFFS_TRACE_BACKGROUND, (TSTR("Update dirty directories" TENDSTR)));
-
- while (!list_empty(&dev->dirty_dirs)) {
- link = dev->dirty_dirs.next;
- list_del_init(link);
-
- d_s = list_entry(link, struct yaffs_dir_var, dirty);
- o_v = list_entry(d_s, union yaffs_obj_var, dir_variant);
- obj = list_entry(o_v, struct yaffs_obj, variant);
-
- T(YAFFS_TRACE_BACKGROUND,
- (TSTR("Update directory %d" TENDSTR), obj->obj_id));
-
- if (obj->dirty)
- yaffs_update_oh(obj, NULL, 0, 0, 0, NULL);
+ }
+ }
}
}
-static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj)
+/*
+ * Delete directory contents for cleaning up lost and found.
+ */
+static void yaffs_del_dir_contents(struct yaffs_obj *dir)
{
- struct yaffs_dev *dev = obj->my_dev;
- struct yaffs_obj *parent;
+ struct yaffs_obj *obj;
+ struct list_head *lh;
+ struct list_head *n;
- yaffs_verify_obj_in_dir(obj);
- parent = obj->parent;
+ if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
+ YBUG();
- yaffs_verify_dir(parent);
+ list_for_each_safe(lh, n, &dir->variant.dir_variant.children) {
+ if (lh) {
+ obj = list_entry(lh, struct yaffs_obj, siblings);
+ if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
+ yaffs_del_dir_contents(obj);
- if (dev && dev->param.remove_obj_fn)
- dev->param.remove_obj_fn(obj);
+ yaffs_trace(YAFFS_TRACE_SCAN,
+ "Deleting lost_found object %d",
+ obj->obj_id);
- list_del_init(&obj->siblings);
- obj->parent = NULL;
+ /* Need to use UnlinkObject since Delete would not handle
+ * hardlinked objects correctly.
+ */
+ yaffs_unlink_obj(obj);
+ }
+ }
- yaffs_verify_dir(parent);
}
-void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj)
+static void yaffs_empty_l_n_f(struct yaffs_dev *dev)
{
- if (!directory) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("tragedy: Trying to add an object to a null pointer directory"
- TENDSTR)));
- YBUG();
- 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 */
- 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);
+ yaffs_del_dir_contents(dev->lost_n_found);
}
+
struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *directory,
const YCHAR * name)
{
return NULL;
if (!directory) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR
- ("tragedy: yaffs_find_by_name: null pointer directory"
- TENDSTR)));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "tragedy: yaffs_find_by_name: null pointer directory"
+ );
YBUG();
return NULL;
}
if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("tragedy: yaffs_find_by_name: non-directory" TENDSTR)));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "tragedy: yaffs_find_by_name: non-directory"
+ );
YBUG();
}
/* Special case for lost-n-found */
if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) {
- if (!yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME))
+ if (!strcmp(name, YAFFS_LOSTNFOUND_NAME))
return l;
- } else if (yaffs_sum_cmp(l->sum, sum)
+ } else if (l->sum == sum
|| l->hdr_chunk <= 0) {
/* LostnFound chunk called Objxxx
* Do a real check
*/
yaffs_get_obj_name(l, buffer,
YAFFS_MAX_NAME_LENGTH + 1);
- if (yaffs_strncmp
+ if (strncmp
(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
return l;
}
int buffer_size)
{
/* Create an object name if we could not find one. */
- if (yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH) == 0) {
+ if (strnlen(name, YAFFS_MAX_NAME_LENGTH) == 0) {
YCHAR local_name[20];
YCHAR num_string[20];
YCHAR *x = &num_string[19];
v /= 10;
}
/* make up a name */
- yaffs_strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX);
- yaffs_strcat(local_name, x);
- yaffs_strncpy(name, local_name, buffer_size - 1);
+ strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX);
+ strcat(local_name, x);
+ strncpy(name, local_name, buffer_size - 1);
}
}
-static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR * name,
- const YCHAR * oh_name, int buff_size)
-{
-#ifdef CONFIG_YAFFS_AUTO_UNICODE
- if (dev->param.auto_unicode) {
- if (*oh_name) {
- /* It is an ASCII name, so do an ASCII to unicode conversion */
- const char *ascii_oh_name = (const char *)oh_name;
- int n = buff_size - 1;
- while (n > 0 && *ascii_oh_name) {
- *name = *ascii_oh_name;
- name++;
- ascii_oh_name++;
- n--;
- }
- } else {
- yaffs_strncpy(name, oh_name + 1, buff_size - 1);
- }
- } else {
-#else
- {
-#endif
- yaffs_strncpy(name, oh_name, buff_size - 1);
- }
-}
-
-static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR * oh_name,
- const YCHAR * name)
-{
-#ifdef CONFIG_YAFFS_AUTO_UNICODE
-
- int is_ascii;
- YCHAR *w;
-
- if (dev->param.auto_unicode) {
-
- is_ascii = 1;
- w = name;
-
- /* Figure out if the name will fit in ascii character set */
- while (is_ascii && *w) {
- if ((*w) & 0xff00)
- is_ascii = 0;
- w++;
- }
-
- if (is_ascii) {
- /* It is an ASCII name, so do a unicode to ascii conversion */
- char *ascii_oh_name = (char *)oh_name;
- int n = YAFFS_MAX_NAME_LENGTH - 1;
- while (n > 0 && *name) {
- *ascii_oh_name = *name;
- name++;
- ascii_oh_name++;
- n--;
- }
- } else {
- /* It is a unicode name, so save starting at the second YCHAR */
- *oh_name = 0;
- yaffs_strncpy(oh_name + 1, name,
- YAFFS_MAX_NAME_LENGTH - 2);
- }
- } else {
-#else
- {
-#endif
- yaffs_strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1);
- }
-
-}
-
int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR * name, int buffer_size)
{
memset(name, 0, buffer_size * sizeof(YCHAR));
yaffs_check_obj_details_loaded(obj);
if (obj->obj_id == YAFFS_OBJECTID_LOSTNFOUND) {
- yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1);
+ strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1);
}
#ifndef CONFIG_YAFFS_NO_SHORT_NAMES
else if (obj->short_name[0]) {
- yaffs_strcpy(name, obj->short_name);
+ strcpy(name, obj->short_name);
}
#endif
else if (obj->hdr_chunk > 0) {
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(struct yaffs_obj *obj)
if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
if (!obj->variant.symlink_variant.alias)
return 0;
- return yaffs_strnlen(obj->variant.symlink_variant.alias,
+ return strnlen(obj->variant.symlink_variant.alias,
YAFFS_MAX_ALIAS_LENGTH);
} else {
/* Only a directory should drop through to here */
return yaffs_clone_str(_Y(""));
}
-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;
-
- 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(struct yaffs_obj *obj, char *buffer,
- struct yaffs_xattr_mod *xmod)
-{
- int retval = 0;
- int x_offs = sizeof(struct yaffs_obj_hdr);
- struct yaffs_dev *dev = obj->my_dev;
- int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr);
-
- char *x_buffer = buffer + x_offs;
-
- if (xmod->set)
- retval =
- nval_set(x_buffer, x_size, xmod->name, xmod->data,
- xmod->size, xmod->flags);
- else
- retval = nval_del(x_buffer, x_size, xmod->name);
-
- obj->has_xattr = nval_hasvalues(x_buffer, x_size);
- obj->xattr_known = 1;
-
- xmod->result = retval;
-
- return retval;
-}
-
-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;
-
- 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(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);
-}
-
-int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name)
-{
- return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 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);
-}
-
-int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size)
-{
- return yaffs_do_xattrib_fetch(obj, NULL, buffer, size);
-}
-
-/*---------------------------- Initialisation code -------------------------------------- */
+/*--------------------------- Initialisation code -------------------------- */
static int yaffs_check_dev_fns(const struct yaffs_dev *dev)
{
unsigned x;
int bits;
- T(YAFFS_TRACE_TRACING,
- (TSTR("yaffs: yaffs_guts_initialise()" TENDSTR)));
+ yaffs_trace(YAFFS_TRACE_TRACING, "yaffs: yaffs_guts_initialise()" );
/* Check stuff that must be set */
if (!dev) {
- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR)));
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "yaffs: Need a device"
+ );
return YAFFS_FAIL;
}
/* 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));
+ if ((!dev->param.inband_tags && dev->param.is_yaffs2 &&
+ dev->param.total_bytes_per_chunk < 1024) ||
+ (!dev->param.is_yaffs2 &&
+ dev->param.total_bytes_per_chunk < 512) ||
+ (dev->param.inband_tags && !dev->param.is_yaffs2) ||
+ dev->param.chunks_per_block < 2 ||
+ dev->param.n_reserved_blocks < 2 ||
+ dev->internal_start_block <= 0 ||
+ dev->internal_end_block <= 0 ||
+ dev->internal_end_block <=
+ (dev->internal_start_block + dev->param.n_reserved_blocks + 2)
+ ) {
+ /* otherwise it is too small */
+ yaffs_trace(YAFFS_TRACE_ALWAYS,
+ "NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d ",
+ dev->param.total_bytes_per_chunk,
+ dev->param.is_yaffs2 ? "2" : "",
+ dev->param.inband_tags);
return YAFFS_FAIL;
}
if (yaffs_init_nand(dev) != YAFFS_OK) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
+ yaffs_trace(YAFFS_TRACE_ALWAYS, "InitialiseNAND failed");
return YAFFS_FAIL;
}
/* Got the right mix of functions? */
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;
}
if (dev->is_mounted) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: device already mounted\n" TENDSTR)));
+ yaffs_trace(YAFFS_TRACE_ALWAYS, "device already mounted");
return YAFFS_FAIL;
}
* 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;
}
if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES)
dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES;
- dev->cache = YMALLOC(cache_bytes);
+ dev->cache = kmalloc(cache_bytes, GFP_NOFS);
buf = (u8 *) dev->cache;
dev->cache[i].last_use = 0;
dev->cache[i].dirty = 0;
dev->cache[i].data = buf =
- YMALLOC_DMA(dev->param.total_bytes_per_chunk);
+ kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
}
if (!buf)
init_failed = 1;
if (!init_failed) {
dev->gc_cleanup_list =
- YMALLOC(dev->param.chunks_per_block * sizeof(u32));
+ kmalloc(dev->param.chunks_per_block * sizeof(u32),
+ GFP_NOFS);
if (!dev->gc_cleanup_list)
init_failed = 1;
}
if (dev->param.is_yaffs2) {
if (yaffs2_checkpt_restore(dev)) {
yaffs_check_obj_details_loaded(dev->root_dir);
- T(YAFFS_TRACE_CHECKPOINT | YAFFS_TRACE_MOUNT,
- (TSTR
- ("yaffs: restored from checkpoint"
- TENDSTR)));
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT | YAFFS_TRACE_MOUNT,
+ "yaffs: restored from checkpoint"
+ );
} else {
/* Clean up the mess caused by an aborted checkpoint load
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;
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;
}
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;
projects / yaffs2.git / blobdiff