/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2010 Aleph One Ltd.
- * for Toby Churchill Ltd and Brightstar Engineering
+ * Copyright (C) 2002-2018 Aleph One Ltd.
*
* Created by Charles Manning <charles@aleph1.co.uk>
*
#include "yaffs_getblockinfo.h"
#include "yaffs_verify.h"
#include "yaffs_attribs.h"
+#include "yaffs_summary.h"
+#include "yaffs_endian.h"
/*
* Checkpoints are really no benefit on very small partitions.
* the partition is at least this big.
*/
#define YAFFS_CHECKPOINT_MIN_BLOCKS 60
-
#define YAFFS_SMALL_HOLE_THRESHOLD 4
/*
*/
void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev)
{
- int i;
+ u32 i;
unsigned seq;
unsigned block_no = 0;
struct yaffs_block_info *b;
b = dev->block_info;
for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
if (b->block_state == YAFFS_BLOCK_STATE_FULL &&
- (b->pages_in_use - b->soft_del_pages) <
- dev->param.chunks_per_block && b->seq_number < seq) {
+ (u32)(b->pages_in_use - b->soft_del_pages) <
+ dev->param.chunks_per_block &&
+ b->seq_number < seq) {
seq = b->seq_number;
block_no = i;
}
dev->oldest_dirty_seq = seq;
dev->oldest_dirty_block = block_no;
}
-
}
void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev)
/*
* yaffs_clear_oldest_dirty_seq()
* Called when a block is erased or marked bad. (ie. when its seq_number
- * becomes invalid). If the value matches the oldest then we clear
+ * becomes invalid). If the value matches the oldest then we clear
* dev->oldest_dirty_seq to force its recomputation.
*/
void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev,
yaffs2_find_oldest_dirty_seq(dev);
- /* Can't do gc of this block if there are any blocks older than this one that have
- * discarded pages.
+ /* Can't do gc of this block if there are any blocks older than this
+ * one that have discarded pages.
*/
return (bi->seq_number <= dev->oldest_dirty_seq);
}
* periodically finds the oldest full block by sequence number for refreshing.
* Only for yaffs2.
*/
-u32 yaffs2_find_refresh_block(struct yaffs_dev * dev)
+u32 yaffs2_find_refresh_block(struct yaffs_dev *dev)
{
u32 b;
-
u32 oldest = 0;
u32 oldest_seq = 0;
-
struct yaffs_block_info *bi;
if (!dev->param.is_yaffs2)
int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev)
{
int retval;
+ int n_bytes = 0;
+ int n_blocks;
+ int dev_blocks;
if (!dev->param.is_yaffs2)
return 0;
if (!dev->checkpoint_blocks_required && yaffs2_checkpt_required(dev)) {
/* Not a valid value so recalculate */
- int n_bytes = 0;
- int n_blocks;
- int dev_blocks =
- (dev->param.end_block - dev->param.start_block + 1);
-
+ dev_blocks = dev->param.end_block - dev->param.start_block + 1;
n_bytes += sizeof(struct yaffs_checkpt_validity);
n_bytes += sizeof(struct yaffs_checkpt_dev);
n_bytes += dev_blocks * sizeof(struct yaffs_block_info);
n_bytes += dev_blocks * dev->chunk_bit_stride;
n_bytes +=
- (sizeof(struct yaffs_checkpt_obj) +
- sizeof(u32)) * (dev->n_obj);
- n_bytes += (dev->tnode_size + sizeof(u32)) * (dev->n_tnodes);
+ (sizeof(struct yaffs_checkpt_obj) + sizeof(u32)) *
+ dev->n_obj;
+ n_bytes += (dev->tnode_size + sizeof(u32)) * dev->n_tnodes;
n_bytes += sizeof(struct yaffs_checkpt_validity);
n_bytes += sizeof(u32); /* checksum */
- /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
+ /* Round up and add 2 blocks to allow for some bad blocks,
+ * so add 3 */
n_blocks =
(n_bytes /
/*--------------------- Checkpointing --------------------*/
+static void yaffs2_do_endian_validity_marker(struct yaffs_dev *dev,
+ struct yaffs_checkpt_validity *v)
+{
+
+ if (!dev->swap_endian)
+ return;
+ v->struct_type = swap_s32(v->struct_type);
+ v->magic = swap_u32(v->magic);
+ v->version = swap_u32(v->version);
+ v->head = swap_u32(v->head);
+}
+
static int yaffs2_wr_checkpt_validity_marker(struct yaffs_dev *dev, int head)
{
struct yaffs_checkpt_validity cp;
cp.version = YAFFS_CHECKPOINT_VERSION;
cp.head = (head) ? 1 : 0;
+ yaffs2_do_endian_validity_marker(dev, &cp);
+
return (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)) ? 1 : 0;
}
int ok;
ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
+ yaffs2_do_endian_validity_marker(dev, &cp);
if (ok)
ok = (cp.struct_type == sizeof(cp)) &&
static void yaffs2_dev_to_checkpt_dev(struct yaffs_checkpt_dev *cp,
struct yaffs_dev *dev)
{
+ cp->struct_type = sizeof(*cp);
+
cp->n_erased_blocks = dev->n_erased_blocks;
cp->alloc_block = dev->alloc_block;
cp->alloc_page = dev->alloc_page;
dev->seq_number = cp->seq_number;
}
+static void yaffs2_do_endian_checkpt_dev(struct yaffs_dev *dev,
+ struct yaffs_checkpt_dev *cp)
+{
+ if (!dev->swap_endian)
+ return;
+ cp->struct_type = swap_s32(cp->struct_type);
+ cp->n_erased_blocks = swap_s32(cp->n_erased_blocks);
+ cp->alloc_block = swap_s32(cp->alloc_block);
+ cp->alloc_page = swap_u32(cp->alloc_page);
+ cp->n_free_chunks = swap_s32(cp->n_free_chunks);
+ cp->n_deleted_files = swap_s32(cp->n_deleted_files);
+ cp->n_unlinked_files = swap_s32(cp->n_unlinked_files);
+ cp->n_bg_deletions = swap_s32(cp->n_bg_deletions);
+}
+
static int yaffs2_wr_checkpt_dev(struct yaffs_dev *dev)
{
struct yaffs_checkpt_dev cp;
u32 n_bytes;
- u32 n_blocks =
- (dev->internal_end_block - dev->internal_start_block + 1);
-
+ u32 n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
int ok;
+ u32 i;
+ union yaffs_block_info_union bu;
/* Write device runtime values */
yaffs2_dev_to_checkpt_dev(&cp, dev);
- cp.struct_type = sizeof(cp);
+ yaffs2_do_endian_checkpt_dev(dev, &cp);
ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp));
+ if (!ok)
+ return 0;
- /* Write block info */
- if (ok) {
+ /* Write block info. */
+ if (!dev->swap_endian) {
n_bytes = n_blocks * sizeof(struct yaffs_block_info);
ok = (yaffs2_checkpt_wr(dev, dev->block_info, n_bytes) ==
- n_bytes);
+ (int)n_bytes);
+ } else {
+ /*
+ * Need to swap the endianisms. We can't do this in place
+ * since that would damage live data,
+ * so write one block info at a time using a copy.
+ */
+ for (i = 0; i < n_blocks && ok; i++) {
+ bu.bi = dev->block_info[i];
+ bu.as_u32[0] = swap_u32(bu.as_u32[0]);
+ bu.as_u32[1] = swap_u32(bu.as_u32[1]);
+ ok = (yaffs2_checkpt_wr(dev, &bu, sizeof(bu)) == sizeof(bu));
+ }
}
- /* Write chunk bits */
- if (ok) {
- n_bytes = n_blocks * dev->chunk_bit_stride;
- ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) ==
- n_bytes);
- }
- return ok ? 1 : 0;
+ if (!ok)
+ return 0;
+ /*
+ * Write chunk bits. Chunk bits are in bytes so
+ * no endian conversion is needed.
+ */
+ n_bytes = n_blocks * dev->chunk_bit_stride;
+ ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) ==
+ (int)n_bytes);
+
+ return ok ? 1 : 0;
}
static int yaffs2_rd_checkpt_dev(struct yaffs_dev *dev)
u32 n_bytes;
u32 n_blocks =
(dev->internal_end_block - dev->internal_start_block + 1);
-
int ok;
ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
if (!ok)
return 0;
+ yaffs2_do_endian_checkpt_dev(dev, &cp);
if (cp.struct_type != sizeof(cp))
return 0;
n_bytes = n_blocks * sizeof(struct yaffs_block_info);
- ok = (yaffs2_checkpt_rd(dev, dev->block_info, n_bytes) == n_bytes);
+ ok = (yaffs2_checkpt_rd(dev, dev->block_info, n_bytes) ==
+ (int)n_bytes);
if (!ok)
return 0;
+
+ if (dev->swap_endian) {
+ /* The block info can just be handled as a list of u32s. */
+ u32 *as_u32 = (u32 *) dev->block_info;
+ u32 n_u32s = n_bytes/sizeof(u32);
+ u32 i;
+
+ for (i=0; i < n_u32s; i++)
+ as_u32[i] = swap_u32(as_u32[i]);
+ }
+
n_bytes = n_blocks * dev->chunk_bit_stride;
- ok = (yaffs2_checkpt_rd(dev, dev->chunk_bits, n_bytes) == n_bytes);
+ ok = (yaffs2_checkpt_rd(dev, dev->chunk_bits, n_bytes) ==
+ (int)n_bytes);
+
return ok ? 1 : 0;
}
+
+static void yaffs2_checkpt_obj_bit_assign(struct yaffs_checkpt_obj *cp,
+ int bit_offset,
+ int bit_width,
+ u32 value)
+{
+ u32 and_mask;
+
+ and_mask = ((1<<bit_width)-1) << bit_offset;
+
+ cp->bit_field &= ~and_mask;
+ cp->bit_field |= ((value << bit_offset) & and_mask);
+}
+
+static u32 yaffs2_checkpt_obj_bit_get(struct yaffs_checkpt_obj *cp,
+ int bit_offset,
+ int bit_width)
+{
+ u32 and_mask;
+
+ and_mask = ((1<<bit_width)-1);
+
+ return (cp->bit_field >> bit_offset) & and_mask;
+}
+
static void yaffs2_obj_checkpt_obj(struct yaffs_checkpt_obj *cp,
struct yaffs_obj *obj)
{
-
cp->obj_id = obj->obj_id;
cp->parent_id = (obj->parent) ? obj->parent->obj_id : 0;
cp->hdr_chunk = obj->hdr_chunk;
- cp->variant_type = obj->variant_type;
- cp->deleted = obj->deleted;
- cp->soft_del = obj->soft_del;
- cp->unlinked = obj->unlinked;
- cp->fake = obj->fake;
- cp->rename_allowed = obj->rename_allowed;
- cp->unlink_allowed = obj->unlink_allowed;
- cp->serial = obj->serial;
+
+ yaffs2_checkpt_obj_bit_assign(cp, CHECKPOINT_VARIANT_BITS, obj->variant_type);
+ yaffs2_checkpt_obj_bit_assign(cp, CHECKPOINT_DELETED_BITS, obj->deleted);
+ yaffs2_checkpt_obj_bit_assign(cp, CHECKPOINT_SOFT_DEL_BITS, obj->soft_del);
+ yaffs2_checkpt_obj_bit_assign(cp, CHECKPOINT_UNLINKED_BITS, obj->unlinked);
+ yaffs2_checkpt_obj_bit_assign(cp, CHECKPOINT_FAKE_BITS, obj->fake);
+ yaffs2_checkpt_obj_bit_assign(cp, CHECKPOINT_RENAME_ALLOWED_BITS, obj->rename_allowed);
+ yaffs2_checkpt_obj_bit_assign(cp, CHECKPOINT_UNLINK_ALLOWED_BITS, obj->unlink_allowed);
+ yaffs2_checkpt_obj_bit_assign(cp, CHECKPOINT_SERIAL_BITS, obj->serial);
+
cp->n_data_chunks = obj->n_data_chunks;
if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
cp->size_or_equiv_obj = obj->variant.hardlink_variant.equiv_id;
}
-static int taffs2_checkpt_obj_to_obj(struct yaffs_obj *obj,
+static int yaffs2_checkpt_obj_to_obj(struct yaffs_obj *obj,
struct yaffs_checkpt_obj *cp)
{
-
struct yaffs_obj *parent;
+ u32 cp_variant_type = yaffs2_checkpt_obj_bit_get(cp, CHECKPOINT_VARIANT_BITS);
- if (obj->variant_type != cp->variant_type) {
+ if (obj->variant_type != cp_variant_type) {
yaffs_trace(YAFFS_TRACE_ERROR,
"Checkpoint read object %d type %d chunk %d does not match existing object type %d",
- cp->obj_id, cp->variant_type, cp->hdr_chunk,
+ cp->obj_id, cp_variant_type, cp->hdr_chunk,
obj->variant_type);
return 0;
}
if (cp->parent_id)
parent = yaffs_find_or_create_by_number(obj->my_dev,
- cp->parent_id,
- YAFFS_OBJECT_TYPE_DIRECTORY);
+ cp->parent_id,
+ YAFFS_OBJECT_TYPE_DIRECTORY);
else
parent = NULL;
yaffs_trace(YAFFS_TRACE_ALWAYS,
"Checkpoint read object %d parent %d type %d chunk %d Parent type, %d, not directory",
cp->obj_id, cp->parent_id,
- cp->variant_type, cp->hdr_chunk,
+ cp_variant_type, cp->hdr_chunk,
parent->variant_type);
return 0;
}
}
obj->hdr_chunk = cp->hdr_chunk;
- obj->variant_type = cp->variant_type;
- obj->deleted = cp->deleted;
- obj->soft_del = cp->soft_del;
- obj->unlinked = cp->unlinked;
- obj->fake = cp->fake;
- obj->rename_allowed = cp->rename_allowed;
- obj->unlink_allowed = cp->unlink_allowed;
- obj->serial = cp->serial;
+
+ obj->variant_type = yaffs2_checkpt_obj_bit_get(cp, CHECKPOINT_VARIANT_BITS);
+ obj->deleted = yaffs2_checkpt_obj_bit_get(cp, CHECKPOINT_DELETED_BITS);
+ obj->soft_del = yaffs2_checkpt_obj_bit_get(cp, CHECKPOINT_SOFT_DEL_BITS);
+ obj->unlinked = yaffs2_checkpt_obj_bit_get(cp, CHECKPOINT_UNLINKED_BITS);
+ obj->fake = yaffs2_checkpt_obj_bit_get(cp, CHECKPOINT_FAKE_BITS);
+ obj->rename_allowed = yaffs2_checkpt_obj_bit_get(cp, CHECKPOINT_RENAME_ALLOWED_BITS);
+ obj->unlink_allowed = yaffs2_checkpt_obj_bit_get(cp, CHECKPOINT_UNLINK_ALLOWED_BITS);
+ obj->serial = yaffs2_checkpt_obj_bit_get(cp, CHECKPOINT_SERIAL_BITS);
+
obj->n_data_chunks = cp->n_data_chunks;
- if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
+ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) {
obj->variant.file_variant.file_size = cp->size_or_equiv_obj;
- else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK)
+ obj->variant.file_variant.stored_size = cp->size_or_equiv_obj;
+ } else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) {
obj->variant.hardlink_variant.equiv_id = cp->size_or_equiv_obj;
-
+ }
if (obj->hdr_chunk > 0)
obj->lazy_loaded = 1;
return 1;
}
+static void yaffs2_do_endian_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn)
+{
+ int i;
+ u32 *as_u32 = (u32 *)tn;
+ int tnode_size_u32 = dev->tnode_size / sizeof(u32);
+
+ if (!dev->swap_endian)
+ return;
+ /* Swap all the tnode data as u32s to fix endianisms. */
+ for (i = 0; i<tnode_size_u32; i++)
+ as_u32[i] = swap_u32(as_u32[i]);
+}
+
+struct yaffs_tnode *yaffs2_do_endian_tnode_copy(struct yaffs_dev *dev,
+ struct yaffs_tnode *tn)
+{
+ if (!dev->swap_endian)
+ return tn;
+
+ memcpy(dev->tn_swap_buffer, tn, dev->tnode_size);
+ tn = dev->tn_swap_buffer;
+
+ yaffs2_do_endian_tnode(dev, tn);
+
+ return tn;
+}
+
static int yaffs2_checkpt_tnode_worker(struct yaffs_obj *in,
struct yaffs_tnode *tn, u32 level,
int chunk_offset)
int i;
struct yaffs_dev *dev = in->my_dev;
int ok = 1;
-
- if (tn) {
- if (level > 0) {
-
- for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
- if (tn->internal[i]) {
- ok = yaffs2_checkpt_tnode_worker(in,
- tn->
- internal
- [i],
- level -
- 1,
- (chunk_offset
- <<
- YAFFS_TNODES_INTERNAL_BITS)
- + i);
- }
- }
- } else if (level == 0) {
- u32 base_offset =
- chunk_offset << YAFFS_TNODES_LEVEL0_BITS;
- ok = (yaffs2_checkpt_wr
- (dev, &base_offset,
- sizeof(base_offset)) == sizeof(base_offset));
- if (ok)
- ok = (yaffs2_checkpt_wr
- (dev, tn,
- dev->tnode_size) == dev->tnode_size);
+ u32 base_offset;
+
+ if (!tn)
+ return 1;
+
+ if (level > 0) {
+ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
+ if (!tn->internal[i])
+ continue;
+ ok = yaffs2_checkpt_tnode_worker(in,
+ tn->internal[i],
+ level - 1,
+ (chunk_offset <<
+ YAFFS_TNODES_INTERNAL_BITS) + i);
}
+ return ok;
}
- return ok;
+ /* Level 0 tnode */
+ base_offset = chunk_offset << YAFFS_TNODES_LEVEL0_BITS;
+ yaffs_do_endian_u32(dev, &base_offset);
+ ok = (yaffs2_checkpt_wr(dev, &base_offset, sizeof(base_offset)) ==
+ sizeof(base_offset));
+ if (ok) {
+ /*
+ * NB Can't do an in-place endian swizzle since that would
+ * damage current tnode data.
+ * If a tnode endian conversion is required we do a copy.
+ */
+ tn = yaffs2_do_endian_tnode_copy(dev, tn);
+ ok = (yaffs2_checkpt_wr(dev, tn, dev->tnode_size) ==
+ (int)dev->tnode_size);
+ }
+ return ok;
}
static int yaffs2_wr_checkpt_tnodes(struct yaffs_obj *obj)
u32 end_marker = ~0;
int ok = 1;
- if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) {
- ok = yaffs2_checkpt_tnode_worker(obj,
- obj->variant.file_variant.top,
- obj->variant.file_variant.
- top_level, 0);
- if (ok)
- ok = (yaffs2_checkpt_wr
- (obj->my_dev, &end_marker,
- sizeof(end_marker)) == sizeof(end_marker));
- }
+ if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
+ return ok;
+
+ ok = yaffs2_checkpt_tnode_worker(obj,
+ obj->variant.file_variant.top,
+ obj->variant.file_variant.
+ top_level, 0);
+ if (ok)
+ ok = (yaffs2_checkpt_wr(obj->my_dev, &end_marker,
+ sizeof(end_marker)) == sizeof(end_marker));
return ok ? 1 : 0;
}
ok = (yaffs2_checkpt_rd(dev, &base_chunk, sizeof(base_chunk)) ==
sizeof(base_chunk));
+ yaffs_do_endian_u32(dev, &base_chunk);
+
while (ok && (~base_chunk)) {
nread++;
/* Read level 0 tnode */
tn = yaffs_get_tnode(dev);
if (tn) {
ok = (yaffs2_checkpt_rd(dev, tn, dev->tnode_size) ==
- dev->tnode_size);
- } else {
+ (int)dev->tnode_size);
+ yaffs2_do_endian_tnode(dev, tn);
+ }
+ else
ok = 0;
- }
if (tn && ok)
ok = yaffs_add_find_tnode_0(dev,
file_stuct_ptr,
base_chunk, tn) ? 1 : 0;
- if (ok)
+ if (ok) {
ok = (yaffs2_checkpt_rd
(dev, &base_chunk,
sizeof(base_chunk)) == sizeof(base_chunk));
+ yaffs_do_endian_u32(dev, &base_chunk);
+ }
}
return ok ? 1 : 0;
}
+
+static void yaffs2_do_endian_checkpt_obj(struct yaffs_dev *dev,
+ struct yaffs_checkpt_obj *cp)
+{
+ if (!dev->swap_endian)
+ return;
+ cp->struct_type = swap_s32(cp->struct_type);
+ cp->obj_id = swap_u32(cp->obj_id);
+ cp->parent_id = swap_u32(cp->parent_id);
+ cp->hdr_chunk = swap_s32(cp->hdr_chunk);
+ cp->bit_field = swap_u32(cp->bit_field);
+ cp->n_data_chunks = swap_s32(cp->n_data_chunks);
+ cp->size_or_equiv_obj = swap_loff_t(cp->size_or_equiv_obj);
+}
+
static int yaffs2_wr_checkpt_objs(struct yaffs_dev *dev)
{
struct yaffs_obj *obj;
int i;
int ok = 1;
struct list_head *lh;
+ u32 cp_variant_type;
/* Iterate through the objects in each hash entry,
* dumping them to the checkpointing stream.
*/
+ (void) cp_variant_type;
+
for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
list_for_each(lh, &dev->obj_bucket[i].list) {
obj = list_entry(lh, struct yaffs_obj, hash_link);
- if (!obj->defered_free) {
+ if (!obj->defered_free) {
yaffs2_obj_checkpt_obj(&cp, obj);
cp.struct_type = sizeof(cp);
-
+ cp_variant_type = yaffs2_checkpt_obj_bit_get(
+ &cp, CHECKPOINT_VARIANT_BITS);
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"Checkpoint write object %d parent %d type %d chunk %d obj addr %p",
cp.obj_id, cp.parent_id,
- cp.variant_type, cp.hdr_chunk, obj);
+ cp_variant_type, cp.hdr_chunk, obj);
+ yaffs2_do_endian_checkpt_obj (dev, &cp);
ok = (yaffs2_checkpt_wr(dev, &cp,
- sizeof(cp)) == sizeof(cp));
+ sizeof(cp)) == sizeof(cp));
if (ok &&
- obj->variant_type ==
- YAFFS_OBJECT_TYPE_FILE)
- ok = yaffs2_wr_checkpt_tnodes(obj);
+ obj->variant_type ==
+ YAFFS_OBJECT_TYPE_FILE)
+ ok = yaffs2_wr_checkpt_tnodes(obj);
}
}
}
/* Dump end of list */
- memset(&cp, 0xFF, sizeof(struct yaffs_checkpt_obj));
+ memset(&cp, 0xff, sizeof(struct yaffs_checkpt_obj));
cp.struct_type = sizeof(cp);
+ yaffs2_do_endian_checkpt_obj (dev, &cp);
if (ok)
ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp));
struct yaffs_checkpt_obj cp;
int ok = 1;
int done = 0;
- struct yaffs_obj *hard_list = NULL;
+ u32 cp_variant_type;
+ LIST_HEAD(hard_list);
+
while (ok && !done) {
ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp));
+ yaffs2_do_endian_checkpt_obj (dev, &cp);
+
if (cp.struct_type != sizeof(cp)) {
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"struct size %d instead of %d ok %d",
ok = 0;
}
+ cp_variant_type = yaffs2_checkpt_obj_bit_get(
+ &cp, CHECKPOINT_VARIANT_BITS);
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"Checkpoint read object %d parent %d type %d chunk %d ",
- cp.obj_id, cp.parent_id, cp.variant_type,
+ cp.obj_id, cp.parent_id, cp_variant_type,
cp.hdr_chunk);
- if (ok && cp.obj_id == ~0) {
+ if (ok && cp.obj_id == (u32)(~0)) {
done = 1;
} else if (ok) {
obj =
yaffs_find_or_create_by_number(dev, cp.obj_id,
- cp.variant_type);
+ cp_variant_type);
if (obj) {
- ok = taffs2_checkpt_obj_to_obj(obj, &cp);
+ ok = yaffs2_checkpt_obj_to_obj(obj, &cp);
if (!ok)
break;
- if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) {
+ if (obj->variant_type ==
+ YAFFS_OBJECT_TYPE_FILE) {
ok = yaffs2_rd_checkpt_tnodes(obj);
} else if (obj->variant_type ==
- YAFFS_OBJECT_TYPE_HARDLINK) {
- obj->hard_links.next =
- (struct list_head *)hard_list;
- hard_list = obj;
+ YAFFS_OBJECT_TYPE_HARDLINK) {
+ list_add(&obj->hard_links, &hard_list);
}
} else {
ok = 0;
- }
+ }
}
}
if (ok)
- yaffs_link_fixup(dev, hard_list);
+ yaffs_link_fixup(dev, &hard_list);
return ok ? 1 : 0;
}
yaffs2_get_checkpt_sum(dev, &checkpt_sum);
+ yaffs_do_endian_u32(dev, &checkpt_sum);
+
ok = (yaffs2_checkpt_wr(dev, &checkpt_sum, sizeof(checkpt_sum)) ==
- sizeof(checkpt_sum));
+ sizeof(checkpt_sum));
if (!ok)
return 0;
yaffs2_get_checkpt_sum(dev, &checkpt_sum0);
ok = (yaffs2_checkpt_rd(dev, &checkpt_sum1, sizeof(checkpt_sum1)) ==
- sizeof(checkpt_sum1));
+ sizeof(checkpt_sum1));
if (!ok)
return 0;
+ yaffs_do_endian_u32(dev, &checkpt_sum1);
if (checkpt_sum0 != checkpt_sum1)
return 0;
dev->is_checkpointed = 0;
return ok ? 1 : 0;
-
}
void yaffs2_checkpt_invalidate(struct yaffs_dev *dev)
int yaffs_checkpoint_save(struct yaffs_dev *dev)
{
-
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"save entry: is_checkpointed %d",
dev->is_checkpointed);
int yaffs2_checkpt_restore(struct yaffs_dev *dev)
{
int retval;
+
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
"restore entry: is_checkpointed %d",
dev->is_checkpointed);
return retval;
}
+/* End of checkpointing */
+
+/* Hole handling logic for truncate past end of file */
+
int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size)
{
/* if new_size > old_file_size.
* We're going to be writing a hole.
- * If the hole is small then write zeros otherwise write a start of hole marker.
+ * If the hole is small then write zeros otherwise write a start
+ * of hole marker.
*/
-
loff_t old_file_size;
- int increase;
+ loff_t increase;
int small_hole;
int result = YAFFS_OK;
struct yaffs_dev *dev = NULL;
-
u8 *local_buffer = NULL;
-
int small_increase_ok = 0;
if (!obj)
small_hole = 0;
if (small_hole)
- local_buffer = yaffs_get_temp_buffer(dev, __LINE__);
+ local_buffer = yaffs_get_temp_buffer(dev);
if (local_buffer) {
/* fill hole with zero bytes */
- int pos = old_file_size;
+ loff_t pos = old_file_size;
int this_write;
int written;
memset(local_buffer, 0, dev->data_bytes_per_chunk);
while (increase > 0 && small_increase_ok) {
this_write = increase;
- if (this_write > dev->data_bytes_per_chunk)
+ if (this_write > (int)dev->data_bytes_per_chunk)
this_write = dev->data_bytes_per_chunk;
written =
yaffs_do_file_wr(obj, local_buffer, pos, this_write,
increase -= this_write;
} else {
small_increase_ok = 0;
- }
+ }
}
- yaffs_release_temp_buffer(dev, local_buffer, __LINE__);
+ yaffs_release_temp_buffer(dev, local_buffer);
- /* If we were out of space then reverse any chunks we've added */
+ /* If out of space then reverse any chunks we've added */
if (!small_increase_ok)
yaffs_resize_file_down(obj, old_file_size);
}
}
return result;
-
}
+/* Yaffs2 scanning */
+
struct yaffs_block_index {
int seq;
int block;
int bseq = ((struct yaffs_block_index *)b)->seq;
int ablock = ((struct yaffs_block_index *)a)->block;
int bblock = ((struct yaffs_block_index *)b)->block;
+
if (aseq == bseq)
return ablock - bblock;
- else
- return aseq - bseq;
+
+ return aseq - bseq;
}
-int yaffs2_scan_backwards(struct yaffs_dev *dev)
+static inline int yaffs2_scan_chunk(struct yaffs_dev *dev,
+ struct yaffs_block_info *bi,
+ int blk, int chunk_in_block,
+ int *found_chunks,
+ u8 *chunk_data,
+ struct list_head *hard_list,
+ int summary_available)
{
+ struct yaffs_obj_hdr *oh;
+ struct yaffs_obj *in;
+ struct yaffs_obj *parent;
+ int equiv_id;
+ loff_t file_size;
+ int is_shrink;
+ int is_unlinked;
struct yaffs_ext_tags tags;
- int blk;
+ int result;
+ int alloc_failed = 0;
+ int chunk = blk * dev->param.chunks_per_block + chunk_in_block;
+ struct yaffs_file_var *file_var;
+ struct yaffs_hardlink_var *hl_var;
+ struct yaffs_symlink_var *sl_var;
+
+ if (summary_available) {
+ result = yaffs_summary_fetch(dev, &tags, chunk_in_block);
+ tags.seq_number = bi->seq_number;
+ }
+
+ if (!summary_available || tags.obj_id == 0) {
+ result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, &tags);
+ dev->tags_used++;
+ } else {
+ dev->summary_used++;
+ }
+
+ if (result == YAFFS_FAIL)
+ yaffs_trace(YAFFS_TRACE_SCAN,
+ "Could not get tags for chunk %d\n", chunk);
+ /* Let's have a good look at this chunk... */
+
+ if (!tags.chunk_used) {
+ /* An unassigned chunk in the block.
+ * If there are used chunks after this one, then
+ * it is a chunk that was skipped due to failing
+ * the erased check. Just skip it so that it can
+ * be deleted.
+ * But, more typically, We get here when this is
+ * an unallocated chunk and his means that
+ * either the block is empty or this is the one
+ * being allocated from
+ */
+
+ if (*found_chunks) {
+ /* This is a chunk that was skipped due
+ * to failing the erased check */
+ } else if (chunk_in_block == 0) {
+ /* We're looking at the first chunk in
+ * the block so the block is unused */
+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
+ dev->n_erased_blocks++;
+ } else {
+ if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
+ bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) {
+ if (dev->seq_number == bi->seq_number) {
+ /* Allocating from this block*/
+ yaffs_trace(YAFFS_TRACE_SCAN,
+ " Allocating from %d %d",
+ blk, chunk_in_block);
+
+ bi->block_state =
+ YAFFS_BLOCK_STATE_ALLOCATING;
+ dev->alloc_block = blk;
+ dev->alloc_page = chunk_in_block;
+ dev->alloc_block_finder = blk;
+ } else {
+ /* This is a partially written block
+ * that is not the current
+ * allocation block.
+ */
+ yaffs_trace(YAFFS_TRACE_SCAN,
+ "Partially written block %d detected. gc will fix this.",
+ blk);
+ }
+ }
+ }
+
+ dev->n_free_chunks++;
+
+ } else if (tags.ecc_result ==
+ YAFFS_ECC_RESULT_UNFIXED) {
+ yaffs_trace(YAFFS_TRACE_SCAN,
+ " Unfixed ECC in chunk(%d:%d), chunk ignored",
+ blk, chunk_in_block);
+ dev->n_free_chunks++;
+ } else if (tags.obj_id > YAFFS_MAX_OBJECT_ID ||
+ tags.chunk_id > YAFFS_MAX_CHUNK_ID ||
+ tags.obj_id == YAFFS_OBJECTID_SUMMARY ||
+ (tags.chunk_id > 0 &&
+ tags.n_bytes > dev->data_bytes_per_chunk) ||
+ tags.seq_number != bi->seq_number) {
+ yaffs_trace(YAFFS_TRACE_SCAN,
+ "Chunk (%d:%d) with bad tags:obj = %d, chunk_id = %d, n_bytes = %d, ignored",
+ blk, chunk_in_block, tags.obj_id,
+ tags.chunk_id, tags.n_bytes);
+ dev->n_free_chunks++;
+ } else if (tags.chunk_id > 0) {
+ /* chunk_id > 0 so it is a data chunk... */
+ loff_t endpos;
+ loff_t chunk_base = (tags.chunk_id - 1) *
+ dev->data_bytes_per_chunk;
+
+ *found_chunks = 1;
+
+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
+ bi->pages_in_use++;
+
+ in = yaffs_find_or_create_by_number(dev,
+ tags.obj_id,
+ YAFFS_OBJECT_TYPE_FILE);
+ if (!in)
+ /* Out of memory */
+ alloc_failed = 1;
+
+ if (in &&
+ in->variant_type == YAFFS_OBJECT_TYPE_FILE &&
+ chunk_base < in->variant.file_variant.shrink_size) {
+ /* This has not been invalidated by
+ * a resize */
+ if (!yaffs_put_chunk_in_file(in, tags.chunk_id,
+ chunk, -1))
+ alloc_failed = 1;
+
+ /* File size is calculated by looking at
+ * the data chunks if we have not
+ * seen an object header yet.
+ * Stop this practice once we find an
+ * object header.
+ */
+ endpos = chunk_base + tags.n_bytes;
+
+ if (!in->valid &&
+ in->variant.file_variant.stored_size < endpos) {
+ in->variant.file_variant.
+ stored_size = endpos;
+ in->variant.file_variant.
+ file_size = endpos;
+ }
+ } else if (in) {
+ /* This chunk has been invalidated by a
+ * resize, or a past file deletion
+ * so delete the chunk*/
+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
+ }
+ } else {
+ /* chunk_id == 0, so it is an ObjectHeader.
+ * Thus, we read in the object header and make
+ * the object
+ */
+ *found_chunks = 1;
+
+ yaffs_set_chunk_bit(dev, blk, chunk_in_block);
+ bi->pages_in_use++;
+
+ oh = NULL;
+ in = NULL;
+
+ if (tags.extra_available) {
+ in = yaffs_find_or_create_by_number(dev,
+ tags.obj_id,
+ tags.extra_obj_type);
+ if (!in)
+ alloc_failed = 1;
+ }
+
+ if (!in ||
+ (!in->valid && dev->param.disable_lazy_load) ||
+ tags.extra_shadows ||
+ (!in->valid && (tags.obj_id == YAFFS_OBJECTID_ROOT ||
+ tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND))) {
+
+ /* If we don't have valid info then we
+ * need to read the chunk
+ * TODO In future we can probably defer
+ * reading the chunk and living with
+ * invalid data until needed.
+ */
+
+ result = yaffs_rd_chunk_tags_nand(dev,
+ chunk,
+ chunk_data,
+ NULL);
+
+ oh = (struct yaffs_obj_hdr *)chunk_data;
+
+ yaffs_do_endian_oh(dev, oh);
+
+ if (dev->param.inband_tags) {
+ /* Fix up the header if they got
+ * corrupted by inband tags */
+ oh->shadows_obj =
+ oh->inband_shadowed_obj_id;
+ oh->is_shrink =
+ oh->inband_is_shrink;
+ }
+
+ if (!in) {
+ in = yaffs_find_or_create_by_number(dev,
+ tags.obj_id, oh->type);
+ if (!in)
+ alloc_failed = 1;
+ }
+ }
+
+ if (!in) {
+ /* TODO Hoosterman we have a problem! */
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "yaffs tragedy: Could not make object for object %d at chunk %d during scan",
+ tags.obj_id, chunk);
+ return YAFFS_FAIL;
+ }
+
+ if (in->valid) {
+ /* We have already filled this one.
+ * We have a duplicate that will be
+ * discarded, but we first have to suck
+ * out resize info if it is a file.
+ */
+ if ((in->variant_type == YAFFS_OBJECT_TYPE_FILE) &&
+ ((oh && oh->type == YAFFS_OBJECT_TYPE_FILE) ||
+ (tags.extra_available &&
+ tags.extra_obj_type == YAFFS_OBJECT_TYPE_FILE)
+ )) {
+ loff_t this_size = (oh) ?
+ yaffs_oh_to_size(dev, oh, 0) :
+ tags.extra_file_size;
+ u32 parent_obj_id = (oh) ?
+ (u32)oh->parent_obj_id :
+ tags.extra_parent_id;
+
+ is_shrink = (oh) ?
+ oh->is_shrink :
+ tags.extra_is_shrink;
+
+ /* If it is deleted (unlinked
+ * at start also means deleted)
+ * we treat the file size as
+ * being zeroed at this point.
+ */
+ if (parent_obj_id == YAFFS_OBJECTID_DELETED ||
+ parent_obj_id == YAFFS_OBJECTID_UNLINKED) {
+ this_size = 0;
+ is_shrink = 1;
+ }
+
+ if (is_shrink &&
+ in->variant.file_variant.shrink_size >
+ this_size)
+ in->variant.file_variant.shrink_size =
+ this_size;
+
+ if (is_shrink)
+ bi->has_shrink_hdr = 1;
+ }
+ /* Use existing - destroy this one. */
+ yaffs_chunk_del(dev, chunk, 1, __LINE__);
+ }
+
+ if (!in->valid && in->variant_type !=
+ (oh ? oh->type : tags.extra_obj_type)) {
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "yaffs tragedy: Bad type, %d != %d, for object %d at chunk %d during scan",
+ oh ? oh->type : tags.extra_obj_type,
+ in->variant_type, tags.obj_id,
+ chunk);
+ in = yaffs_retype_obj(in, oh ? oh->type : tags.extra_obj_type);
+ }
+
+ if (!in->valid &&
+ (tags.obj_id == YAFFS_OBJECTID_ROOT ||
+ tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND)) {
+ /* We only load some info, don't fiddle
+ * with directory structure */
+ in->valid = 1;
+
+ if (oh) {
+ in->yst_mode = oh->yst_mode;
+ yaffs_load_attribs(in, oh);
+ in->lazy_loaded = 0;
+ } else {
+ in->lazy_loaded = 1;
+ }
+ in->hdr_chunk = chunk;
+
+ } else if (!in->valid) {
+ /* we need to load this info */
+ in->valid = 1;
+ in->hdr_chunk = chunk;
+ if (oh) {
+ in->variant_type = oh->type;
+ in->yst_mode = oh->yst_mode;
+ yaffs_load_attribs(in, oh);
+
+ if (oh->shadows_obj > 0)
+ yaffs_handle_shadowed_obj(dev,
+ oh->shadows_obj, 1);
+
+ yaffs_set_obj_name_from_oh(in, oh);
+ parent = yaffs_find_or_create_by_number(dev,
+ oh->parent_obj_id,
+ YAFFS_OBJECT_TYPE_DIRECTORY);
+ file_size = yaffs_oh_to_size(dev, oh, 0);
+ is_shrink = oh->is_shrink;
+ equiv_id = oh->equiv_id;
+ } else {
+ in->variant_type = tags.extra_obj_type;
+ parent = yaffs_find_or_create_by_number(dev,
+ tags.extra_parent_id,
+ YAFFS_OBJECT_TYPE_DIRECTORY);
+ file_size = tags.extra_file_size;
+ is_shrink = tags.extra_is_shrink;
+ equiv_id = tags.extra_equiv_id;
+ in->lazy_loaded = 1;
+ }
+ in->dirty = 0;
+
+ if (!parent)
+ alloc_failed = 1;
+
+ /* directory stuff...
+ * hook up to parent
+ */
+
+ if (parent &&
+ parent->variant_type == YAFFS_OBJECT_TYPE_UNKNOWN) {
+ /* Set up as a directory */
+ parent->variant_type =
+ YAFFS_OBJECT_TYPE_DIRECTORY;
+ INIT_LIST_HEAD(&parent->
+ variant.dir_variant.children);
+ } else if (!parent ||
+ parent->variant_type !=
+ YAFFS_OBJECT_TYPE_DIRECTORY) {
+ /* Hoosterman, another problem....
+ * Trying to use a non-directory as a directory
+ */
+
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
+ );
+ parent = dev->lost_n_found;
+ }
+ yaffs_add_obj_to_dir(parent, in);
+
+ is_unlinked = (parent == dev->del_dir) ||
+ (parent == dev->unlinked_dir);
+
+ if (is_shrink)
+ /* Mark the block */
+ bi->has_shrink_hdr = 1;
+
+ /* Note re hardlinks.
+ * Since we might scan a hardlink before its equivalent
+ * object is scanned we put them all in a list.
+ * After scanning is complete, we should have all the
+ * objects, so we run through this list and fix up all
+ * the chains.
+ */
+
+ switch (in->variant_type) {
+ case YAFFS_OBJECT_TYPE_UNKNOWN:
+ /* Todo got a problem */
+ break;
+ case YAFFS_OBJECT_TYPE_FILE:
+ file_var = &in->variant.file_variant;
+ if (file_var->stored_size < file_size) {
+ /* This covers the case where the file
+ * size is greater than the data held.
+ * This will happen if the file is
+ * resized to be larger than its
+ * current data extents.
+ */
+ file_var->file_size = file_size;
+ file_var->stored_size = file_size;
+ }
+
+ if (file_var->shrink_size > file_size)
+ file_var->shrink_size = file_size;
+
+ break;
+ case YAFFS_OBJECT_TYPE_HARDLINK:
+ hl_var = &in->variant.hardlink_variant;
+ if (!is_unlinked) {
+ hl_var->equiv_id = equiv_id;
+ list_add(&in->hard_links, hard_list);
+ }
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SPECIAL:
+ /* Do nothing */
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+ sl_var = &in->variant.symlink_variant;
+ if (oh) {
+ sl_var->alias =
+ yaffs_clone_str(oh->alias);
+ if (!sl_var->alias)
+ alloc_failed = 1;
+ }
+ break;
+ }
+ }
+ }
+ return alloc_failed ? YAFFS_FAIL : YAFFS_OK;
+}
+
+int yaffs2_scan_backwards(struct yaffs_dev *dev)
+{
+ u32 blk;
int block_iter;
int start_iter;
int end_iter;
int n_to_scan = 0;
-
- int chunk;
- int result;
- int c;
- int deleted;
enum yaffs_block_state state;
- struct yaffs_obj *hard_list = NULL;
+ int c;
+ LIST_HEAD(hard_list);
struct yaffs_block_info *bi;
u32 seq_number;
- struct yaffs_obj_hdr *oh;
- struct yaffs_obj *in;
- struct yaffs_obj *parent;
int n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
- int is_unlinked;
u8 *chunk_data;
-
- int file_size;
- int is_shrink;
int found_chunks;
- int equiv_id;
int alloc_failed = 0;
-
struct yaffs_block_index *block_index = NULL;
int alt_block_index = 0;
+ int summary_available;
yaffs_trace(YAFFS_TRACE_SCAN,
"yaffs2_scan_backwards starts intstartblk %d intendblk %d...",
dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
- block_index = kmalloc(n_blocks * sizeof(struct yaffs_block_index),
- GFP_NOFS);
+ block_index =
+ kmalloc(n_blocks * sizeof(struct yaffs_block_index), GFP_NOFS);
if (!block_index) {
block_index =
dev->blocks_in_checkpt = 0;
- chunk_data = yaffs_get_temp_buffer(dev, __LINE__);
+ chunk_data = yaffs_get_temp_buffer(dev);
/* Scan all the blocks to determine their state */
bi = dev->block_info;
bi->seq_number = seq_number;
if (bi->seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA)
- bi->block_state = state = YAFFS_BLOCK_STATE_CHECKPOINT;
+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK)
- bi->block_state = state = YAFFS_BLOCK_STATE_DEAD;
+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
yaffs_trace(YAFFS_TRACE_SCAN_DEBUG,
"Block scanning block %d state %d seq %d",
- blk, state, seq_number);
+ blk, bi->block_state, seq_number);
- if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
+ if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) {
dev->blocks_in_checkpt++;
- } else if (state == YAFFS_BLOCK_STATE_DEAD) {
+ } else if (bi->block_state == YAFFS_BLOCK_STATE_DEAD) {
yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
"block %d is bad", blk);
- } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
+ } else if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty ");
dev->n_erased_blocks++;
dev->n_free_chunks += dev->param.chunks_per_block;
- } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
-
+ } else if (bi->block_state ==
+ YAFFS_BLOCK_STATE_NEEDS_SCAN) {
/* Determine the highest sequence number */
if (seq_number >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
seq_number < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
-
block_index[n_to_scan].seq = seq_number;
block_index[n_to_scan].block = blk;
-
n_to_scan++;
-
if (seq_number >= dev->seq_number)
dev->seq_number = seq_number;
} else {
yaffs_trace(YAFFS_TRACE_SCAN,
"Block scanning block %d has bad sequence number %d",
blk, seq_number);
-
}
}
bi++;
}
- yaffs_trace(YAFFS_TRACE_SCAN, "%d blocks to be sorted...", n_to_scan);
+ yaffs_trace(YAFFS_TRACE_ALWAYS, "%d blocks to be sorted...", n_to_scan);
cond_resched();
yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "%d blocks to scan", n_to_scan);
/* For each block.... backwards */
- for (block_iter = end_iter; !alloc_failed && block_iter >= start_iter;
+ for (block_iter = end_iter;
+ !alloc_failed && block_iter >= start_iter;
block_iter--) {
/* Cooperative multitasking! This loop can run for so
long that watchdog timers expire. */
/* get the block to scan in the correct order */
blk = block_index[block_iter].block;
-
bi = yaffs_get_block_info(dev, blk);
- state = bi->block_state;
-
- deleted = 0;
+ summary_available = yaffs_summary_read(dev, dev->sum_tags, blk);
/* For each chunk in each block that needs scanning.... */
found_chunks = 0;
- for (c = dev->param.chunks_per_block - 1;
+ if (summary_available)
+ c = dev->chunks_per_summary - 1;
+ else
+ c = dev->param.chunks_per_block - 1;
+
+ for (/* c is already initialised */;
!alloc_failed && c >= 0 &&
- (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
- state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
+ (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN ||
+ bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING);
+ c--) {
/* Scan backwards...
* Read the tags and decide what to do
*/
-
- chunk = blk * dev->param.chunks_per_block + c;
-
- result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL,
- &tags);
-
- /* Let's have a good look at this chunk... */
-
- if (!tags.chunk_used) {
- /* An unassigned chunk in the block.
- * If there are used chunks after this one, then
- * it is a chunk that was skipped due to failing the erased
- * check. Just skip it so that it can be deleted.
- * But, more typically, We get here when this is an unallocated
- * chunk and his means that either the block is empty or
- * this is the one being allocated from
- */
-
- if (found_chunks) {
- /* This is a chunk that was skipped due to failing the erased check */
- } else if (c == 0) {
- /* We're looking at the first chunk in the block so the block is unused */
- state = YAFFS_BLOCK_STATE_EMPTY;
- dev->n_erased_blocks++;
- } else {
- if (state ==
- YAFFS_BLOCK_STATE_NEEDS_SCANNING
- || state ==
- YAFFS_BLOCK_STATE_ALLOCATING) {
- if (dev->seq_number ==
- bi->seq_number) {
- /* this is the block being allocated from */
-
- yaffs_trace(YAFFS_TRACE_SCAN,
- " Allocating from %d %d",
- blk, c);
-
- state =
- YAFFS_BLOCK_STATE_ALLOCATING;
- dev->alloc_block = blk;
- dev->alloc_page = c;
- dev->
- alloc_block_finder =
- blk;
- } else {
- /* This is a partially written block that is not
- * the current allocation block.
- */
-
- yaffs_trace(YAFFS_TRACE_SCAN,
- "Partially written block %d detected",
- blk);
- }
- }
- }
-
- dev->n_free_chunks++;
-
- } else if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED) {
- yaffs_trace(YAFFS_TRACE_SCAN,
- " Unfixed ECC in chunk(%d:%d), chunk ignored",
- blk, c);
-
- dev->n_free_chunks++;
-
- } else if (tags.obj_id > YAFFS_MAX_OBJECT_ID ||
- tags.chunk_id > YAFFS_MAX_CHUNK_ID ||
- (tags.chunk_id > 0
- && tags.n_bytes > dev->data_bytes_per_chunk)
- || tags.seq_number != bi->seq_number) {
- yaffs_trace(YAFFS_TRACE_SCAN,
- "Chunk (%d:%d) with bad tags:obj = %d, chunk_id = %d, n_bytes = %d, ignored",
- blk, c, tags.obj_id,
- tags.chunk_id, tags.n_bytes);
-
- dev->n_free_chunks++;
-
- } else if (tags.chunk_id > 0) {
- /* chunk_id > 0 so it is a data chunk... */
- unsigned int endpos;
- u32 chunk_base =
- (tags.chunk_id -
- 1) * dev->data_bytes_per_chunk;
-
- found_chunks = 1;
-
- yaffs_set_chunk_bit(dev, blk, c);
- bi->pages_in_use++;
-
- in = yaffs_find_or_create_by_number(dev,
- tags.obj_id,
- YAFFS_OBJECT_TYPE_FILE);
- if (!in) {
- /* Out of memory */
- alloc_failed = 1;
- }
-
- if (in &&
- in->variant_type == YAFFS_OBJECT_TYPE_FILE
- && chunk_base <
- in->variant.file_variant.shrink_size) {
- /* This has not been invalidated by a resize */
- if (!yaffs_put_chunk_in_file
- (in, tags.chunk_id, chunk, -1)) {
- alloc_failed = 1;
- }
-
- /* File size is calculated by looking at the data chunks if we have not
- * seen an object header yet. Stop this practice once we find an object header.
- */
- endpos = chunk_base + tags.n_bytes;
-
- if (!in->valid && /* have not got an object header yet */
- in->variant.file_variant.
- scanned_size < endpos) {
- in->variant.file_variant.
- scanned_size = endpos;
- in->variant.file_variant.
- file_size = endpos;
- }
-
- } else if (in) {
- /* This chunk has been invalidated by a resize, or a past file deletion
- * so delete the chunk*/
- yaffs_chunk_del(dev, chunk, 1,
- __LINE__);
-
- }
- } else {
- /* chunk_id == 0, so it is an ObjectHeader.
- * Thus, we read in the object header and make the object
- */
- found_chunks = 1;
-
- yaffs_set_chunk_bit(dev, blk, c);
- bi->pages_in_use++;
-
- oh = NULL;
- in = NULL;
-
- if (tags.extra_available) {
- in = yaffs_find_or_create_by_number(dev,
- tags.
- obj_id,
- tags.
- extra_obj_type);
- if (!in)
- alloc_failed = 1;
- }
-
- if (!in ||
- (!in->valid && dev->param.disable_lazy_load)
- || tags.extra_shadows || (!in->valid
- && (tags.obj_id ==
- YAFFS_OBJECTID_ROOT
- || tags.
- obj_id ==
- YAFFS_OBJECTID_LOSTNFOUND)))
- {
-
- /* If we don't have valid info then we need to read the chunk
- * TODO In future we can probably defer reading the chunk and
- * living with invalid data until needed.
- */
-
- result = yaffs_rd_chunk_tags_nand(dev,
- chunk,
- chunk_data,
- NULL);
-
- oh = (struct yaffs_obj_hdr *)chunk_data;
-
- if (dev->param.inband_tags) {
- /* Fix up the header if they got corrupted by inband tags */
- oh->shadows_obj =
- oh->inband_shadowed_obj_id;
- oh->is_shrink =
- oh->inband_is_shrink;
- }
-
- if (!in) {
- in = yaffs_find_or_create_by_number(dev, tags.obj_id, oh->type);
- if (!in)
- alloc_failed = 1;
- }
-
- }
-
- if (!in) {
- /* TODO Hoosterman we have a problem! */
- yaffs_trace(YAFFS_TRACE_ERROR,
- "yaffs tragedy: Could not make object for object %d at chunk %d during scan",
- tags.obj_id, chunk);
- continue;
- }
-
- if (in->valid) {
- /* We have already filled this one.
- * We have a duplicate that will be discarded, but
- * we first have to suck out resize info if it is a file.
- */
-
- if ((in->variant_type ==
- YAFFS_OBJECT_TYPE_FILE) && ((oh
- &&
- oh->
- type
- ==
- YAFFS_OBJECT_TYPE_FILE)
- ||
- (tags.
- extra_available
- &&
- tags.
- extra_obj_type
- ==
- YAFFS_OBJECT_TYPE_FILE)))
- {
- u32 this_size =
- (oh) ? oh->
- file_size :
- tags.extra_length;
- u32 parent_obj_id =
- (oh) ? oh->parent_obj_id :
- tags.extra_parent_id;
-
- is_shrink =
- (oh) ? oh->
- is_shrink :
- tags.extra_is_shrink;
-
- /* If it is deleted (unlinked at start also means deleted)
- * we treat the file size as being zeroed at this point.
- */
- if (parent_obj_id ==
- YAFFS_OBJECTID_DELETED
- || parent_obj_id ==
- YAFFS_OBJECTID_UNLINKED) {
- this_size = 0;
- is_shrink = 1;
- }
-
- if (is_shrink
- && in->variant.file_variant.
- shrink_size > this_size)
- in->variant.
- file_variant.
- shrink_size =
- this_size;
-
- if (is_shrink)
- bi->has_shrink_hdr = 1;
-
- }
- /* Use existing - destroy this one. */
- yaffs_chunk_del(dev, chunk, 1,
- __LINE__);
-
- }
-
- if (!in->valid && in->variant_type !=
- (oh ? oh->type : tags.extra_obj_type))
- yaffs_trace(YAFFS_TRACE_ERROR,
- "yaffs tragedy: Bad object type, %d != %d, for object %d at chunk %d during scan",
- oh ?
- oh->type : tags.extra_obj_type,
- in->variant_type, tags.obj_id,
- chunk);
-
- if (!in->valid &&
- (tags.obj_id == YAFFS_OBJECTID_ROOT ||
- tags.obj_id ==
- YAFFS_OBJECTID_LOSTNFOUND)) {
- /* We only load some info, don't fiddle with directory structure */
- in->valid = 1;
-
- if (oh) {
-
- in->yst_mode = oh->yst_mode;
- yaffs_load_attribs(in, oh);
- in->lazy_loaded = 0;
- } else {
- in->lazy_loaded = 1;
- }
- in->hdr_chunk = chunk;
-
- } else if (!in->valid) {
- /* we need to load this info */
-
- in->valid = 1;
- in->hdr_chunk = chunk;
-
- if (oh) {
- in->variant_type = oh->type;
-
- in->yst_mode = oh->yst_mode;
- yaffs_load_attribs(in, oh);
-
- if (oh->shadows_obj > 0)
- yaffs_handle_shadowed_obj
- (dev,
- oh->shadows_obj,
- 1);
-
- yaffs_set_obj_name_from_oh(in,
- oh);
- parent =
- yaffs_find_or_create_by_number
- (dev, oh->parent_obj_id,
- YAFFS_OBJECT_TYPE_DIRECTORY);
-
- file_size = oh->file_size;
- is_shrink = oh->is_shrink;
- equiv_id = oh->equiv_id;
-
- } else {
- in->variant_type =
- tags.extra_obj_type;
- parent =
- yaffs_find_or_create_by_number
- (dev, tags.extra_parent_id,
- YAFFS_OBJECT_TYPE_DIRECTORY);
- file_size = tags.extra_length;
- is_shrink =
- tags.extra_is_shrink;
- equiv_id = tags.extra_equiv_id;
- in->lazy_loaded = 1;
-
- }
- in->dirty = 0;
-
- if (!parent)
- alloc_failed = 1;
-
- /* directory stuff...
- * hook up to parent
- */
-
- if (parent && parent->variant_type ==
- YAFFS_OBJECT_TYPE_UNKNOWN) {
- /* Set up as a directory */
- parent->variant_type =
- YAFFS_OBJECT_TYPE_DIRECTORY;
- INIT_LIST_HEAD(&parent->
- variant.dir_variant.children);
- } else if (!parent
- || parent->variant_type !=
- YAFFS_OBJECT_TYPE_DIRECTORY) {
- /* Hoosterman, another problem....
- * We're trying to use a non-directory as a directory
- */
-
- yaffs_trace(YAFFS_TRACE_ERROR,
- "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
- );
- parent = dev->lost_n_found;
- }
-
- yaffs_add_obj_to_dir(parent, in);
-
- is_unlinked = (parent == dev->del_dir)
- || (parent == dev->unlinked_dir);
-
- if (is_shrink) {
- /* Mark the block as having a shrink header */
- bi->has_shrink_hdr = 1;
- }
-
- /* Note re hardlinks.
- * Since we might scan a hardlink before its equivalent object is scanned
- * we put them all in a list.
- * After scanning is complete, we should have all the objects, so we run
- * through this list and fix up all the chains.
- */
-
- switch (in->variant_type) {
- case YAFFS_OBJECT_TYPE_UNKNOWN:
- /* Todo got a problem */
- break;
- case YAFFS_OBJECT_TYPE_FILE:
-
- if (in->variant.
- file_variant.scanned_size <
- file_size) {
- /* This covers the case where the file size is greater
- * than where the data is
- * This will happen if the file is resized to be larger
- * than its current data extents.
- */
- in->variant.
- file_variant.
- file_size =
- file_size;
- in->variant.
- file_variant.
- scanned_size =
- file_size;
- }
-
- if (in->variant.file_variant.
- shrink_size > file_size)
- in->variant.
- file_variant.
- shrink_size =
- file_size;
-
- break;
- case YAFFS_OBJECT_TYPE_HARDLINK:
- if (!is_unlinked) {
- in->variant.
- hardlink_variant.
- equiv_id = equiv_id;
- in->hard_links.next =
- (struct list_head *)
- hard_list;
- hard_list = in;
- }
- break;
- case YAFFS_OBJECT_TYPE_DIRECTORY:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SPECIAL:
- /* Do nothing */
- break;
- case YAFFS_OBJECT_TYPE_SYMLINK:
- if (oh) {
- in->variant.
- symlink_variant.
- alias =
- yaffs_clone_str(oh->
- alias);
- if (!in->variant.
- symlink_variant.
- alias)
- alloc_failed =
- 1;
- }
- break;
- }
-
- }
-
- }
-
- } /* End of scanning for each chunk */
-
- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
- /* If we got this far while scanning, then the block is fully allocated. */
- state = YAFFS_BLOCK_STATE_FULL;
+ if (yaffs2_scan_chunk(dev, bi, blk, c,
+ &found_chunks, chunk_data,
+ &hard_list, summary_available) ==
+ YAFFS_FAIL)
+ alloc_failed = 1;
}
- bi->block_state = state;
+ if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN) {
+ /* If we got this far while scanning, then the block
+ * is fully allocated. */
+ bi->block_state = YAFFS_BLOCK_STATE_FULL;
+ }
/* Now let's see if it was dirty */
if (bi->pages_in_use == 0 &&
bi->block_state == YAFFS_BLOCK_STATE_FULL) {
yaffs_block_became_dirty(dev, blk);
}
-
}
yaffs_skip_rest_of_block(dev);
/* Ok, we've done all the scanning.
* Fix up the hard link chains.
- * We should now have scanned all the objects, now it's time to add these
+ * We have scanned all the objects, now it's time to add these
* hardlinks.
*/
- yaffs_link_fixup(dev, hard_list);
+ yaffs_link_fixup(dev, &hard_list);
- yaffs_release_temp_buffer(dev, chunk_data, __LINE__);
+ yaffs_release_temp_buffer(dev, chunk_data);
if (alloc_failed)
return YAFFS_FAIL;
projects / yaffs2.git / blobdiff