/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2011 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_verify.h"
#include "yaffs_attribs.h"
#include "yaffs_summary.h"
+#include "yaffs_endian.h"
/*
* Checkpoints are really no benefit on very small partitions.
*/
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) <
+ (u32)(b->pages_in_use - b->soft_del_pages) <
dev->param.chunks_per_block &&
b->seq_number < seq) {
seq = b->seq_number;
/*--------------------- 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;
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 */
- n_bytes = n_blocks * sizeof(struct yaffs_block_info);
- ok = (yaffs2_checkpt_wr(dev, dev->block_info, n_bytes) == n_bytes);
+ /* 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) ==
+ (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));
+ }
+ }
+
if (!ok)
return 0;
- /* Write chunk bits */
+ /*
+ * 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) == n_bytes);
+ ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) ==
+ (int)n_bytes);
return ok ? 1 : 0;
}
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)
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;
}
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)
/* 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)
+ 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) ==
- dev->tnode_size);
-
+ (int)dev->tnode_size);
+ }
return ok;
}
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)
+ if (tn) {
ok = (yaffs2_checkpt_rd(dev, tn, dev->tnode_size) ==
- dev->tnode_size);
+ (int)dev->tnode_size);
+ yaffs2_do_endian_tnode(dev, tn);
+ }
else
ok = 0;
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);
+ }
+
}
yaffs_trace(YAFFS_TRACE_CHECKPOINT,
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) {
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));
/* Dump end of list */
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;
+ 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 = yaffs2_checkpt_obj_to_obj(obj, &cp);
if (!ok)
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));
if (!ok)
return 0;
+ yaffs_do_endian_u32(dev, &checkpt_sum1);
if (checkpt_sum0 != checkpt_sum1)
return 0;
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.
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,
return result;
}
+/* Yaffs2 scanning */
+
struct yaffs_block_index {
int seq;
int block;
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) {
endpos = chunk_base + tags.n_bytes;
if (!in->valid &&
- in->variant.file_variant.scanned_size < endpos) {
+ in->variant.file_variant.stored_size < endpos) {
in->variant.file_variant.
- scanned_size = endpos;
+ stored_size = endpos;
in->variant.file_variant.
file_size = endpos;
}
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 */
tags.extra_obj_type == YAFFS_OBJECT_TYPE_FILE)
)) {
loff_t this_size = (oh) ?
- yaffs_oh_to_size(oh) :
+ yaffs_oh_to_size(dev, oh, 0) :
tags.extra_file_size;
u32 parent_obj_id = (oh) ?
- oh->parent_obj_id :
+ (u32)oh->parent_obj_id :
tags.extra_parent_id;
is_shrink = (oh) ?
parent = yaffs_find_or_create_by_number(dev,
oh->parent_obj_id,
YAFFS_OBJECT_TYPE_DIRECTORY);
- file_size = yaffs_oh_to_size(oh);
+ file_size = yaffs_oh_to_size(dev, oh, 0);
is_shrink = oh->is_shrink;
equiv_id = oh->equiv_id;
} else {
break;
case YAFFS_OBJECT_TYPE_FILE:
file_var = &in->variant.file_variant;
- if (file_var->scanned_size < file_size) {
+ 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
* current data extents.
*/
file_var->file_size = file_size;
- file_var->scanned_size = file_size;
+ file_var->stored_size = file_size;
}
if (file_var->shrink_size > file_size)
int yaffs2_scan_backwards(struct yaffs_dev *dev)
{
- int blk;
+ u32 blk;
int block_iter;
int start_iter;
int end_iter;
int n_to_scan = 0;
enum yaffs_block_state state;
int c;
- int deleted;
LIST_HEAD(hard_list);
struct yaffs_block_info *bi;
u32 seq_number;
/* get the block to scan in the correct order */
blk = block_index[block_iter].block;
bi = yaffs_get_block_info(dev, blk);
- deleted = 0;
summary_available = yaffs_summary_read(dev, dev->sum_tags, blk);
projects / yaffs2.git / blobdiff