* Boston, MA 021110-1307, USA.
*/
-#include <linux/module.h>
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
struct btrfs_file_extent_item *item;
struct btrfs_key file_key;
struct btrfs_path *path;
+ struct extent_buffer *leaf;
path = btrfs_alloc_path();
BUG_ON(!path);
- btrfs_init_path(path);
file_key.objectid = objectid;
file_key.offset = pos;
- file_key.flags = 0;
btrfs_set_key_type(&file_key, BTRFS_EXTENT_DATA_KEY);
ret = btrfs_insert_empty_item(trans, root, path, &file_key,
sizeof(*item));
+ if (ret < 0)
+ goto out;
BUG_ON(ret);
- item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0],
+ leaf = path->nodes[0];
+ item = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
- btrfs_set_file_extent_disk_blocknr(item, offset);
- btrfs_set_file_extent_disk_num_blocks(item, disk_num_blocks);
- btrfs_set_file_extent_offset(item, 0);
- btrfs_set_file_extent_num_blocks(item, num_blocks);
- btrfs_set_file_extent_generation(item, trans->transid);
- btrfs_set_file_extent_type(item, BTRFS_FILE_EXTENT_REG);
- btrfs_mark_buffer_dirty(path->nodes[0]);
-
- btrfs_release_path(root, path);
+ btrfs_set_file_extent_disk_blocknr(leaf, item, offset);
+ btrfs_set_file_extent_disk_num_blocks(leaf, item, disk_num_blocks);
+ btrfs_set_file_extent_offset(leaf, item, 0);
+ btrfs_set_file_extent_num_blocks(leaf, item, num_blocks);
+ btrfs_set_file_extent_generation(leaf, item, trans->transid);
+ btrfs_set_file_extent_type(leaf, item, BTRFS_FILE_EXTENT_REG);
+ btrfs_mark_buffer_dirty(leaf);
+out:
btrfs_free_path(path);
- return 0;
+ return ret;
}
struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
struct btrfs_key file_key;
struct btrfs_key found_key;
struct btrfs_csum_item *item;
- struct btrfs_leaf *leaf;
+ struct extent_buffer *leaf;
u64 csum_offset = 0;
int csums_in_item;
file_key.objectid = objectid;
file_key.offset = offset;
- file_key.flags = 0;
btrfs_set_key_type(&file_key, BTRFS_CSUM_ITEM_KEY);
ret = btrfs_search_slot(trans, root, &file_key, path, 0, cow);
if (ret < 0)
goto fail;
- leaf = btrfs_buffer_leaf(path->nodes[0]);
+ leaf = path->nodes[0];
if (ret > 0) {
ret = 1;
if (path->slots[0] == 0)
goto fail;
path->slots[0]--;
- btrfs_disk_key_to_cpu(&found_key,
- &leaf->items[path->slots[0]].key);
+ btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
if (btrfs_key_type(&found_key) != BTRFS_CSUM_ITEM_KEY ||
found_key.objectid != objectid) {
goto fail;
}
csum_offset = (offset - found_key.offset) >>
root->fs_info->sb->s_blocksize_bits;
- csums_in_item = btrfs_item_size(leaf->items + path->slots[0]);
+ csums_in_item = btrfs_item_size_nr(leaf, path->slots[0]);
csums_in_item /= BTRFS_CRC32_SIZE;
if (csum_offset >= csums_in_item) {
file_key.objectid = objectid;
file_key.offset = offset;
- file_key.flags = 0;
btrfs_set_key_type(&file_key, BTRFS_EXTENT_DATA_KEY);
ret = btrfs_search_slot(trans, root, &file_key, path, ins_len, cow);
return ret;
u64 objectid, u64 offset,
char *data, size_t len)
{
+ return 0;
+#if 0
int ret;
struct btrfs_key file_key;
struct btrfs_key found_key;
struct btrfs_path *path;
struct btrfs_csum_item *item;
- struct btrfs_leaf *leaf;
+ struct extent_buffer *leaf;
u64 csum_offset;
path = btrfs_alloc_path();
if (ret == -EFBIG) {
u32 item_size;
/* we found one, but it isn't big enough yet */
- leaf = btrfs_buffer_leaf(path->nodes[0]);
- item_size = btrfs_item_size(leaf->items + path->slots[0]);
+ leaf = path->nodes[0];
+ item_size = btrfs_item_size_nr(leaf, path->slots[0]);
if ((item_size / BTRFS_CRC32_SIZE) >= MAX_CSUM_ITEMS(root)) {
/* already at max size, make a new one */
goto insert;
goto insert;
}
path->slots[0]--;
- leaf = btrfs_buffer_leaf(path->nodes[0]);
- btrfs_disk_key_to_cpu(&found_key, &leaf->items[path->slots[0]].key);
+ leaf = path->nodes[0];
+ btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
csum_offset = (offset - found_key.offset) >>
root->fs_info->sb->s_blocksize_bits;
if (btrfs_key_type(&found_key) != BTRFS_CSUM_ITEM_KEY ||
csum_offset >= MAX_CSUM_ITEMS(root)) {
goto insert;
}
- if (csum_offset >= btrfs_item_size(leaf->items + path->slots[0]) /
+ if (csum_offset >= btrfs_item_size_nr(leaf, path->slots[0]) /
BTRFS_CRC32_SIZE) {
u32 diff = (csum_offset + 1) * BTRFS_CRC32_SIZE;
- diff = diff - btrfs_item_size(leaf->items + path->slots[0]);
+ diff = diff - btrfs_item_size_nr(leaf, path->slots[0]);
if (diff != BTRFS_CRC32_SIZE)
goto insert;
ret = btrfs_extend_item(trans, root, path, diff);
csum_offset = 0;
ret = btrfs_insert_empty_item(trans, root, path, &file_key,
BTRFS_CRC32_SIZE);
+ if (ret < 0)
+ goto fail;
if (ret != 0) {
WARN_ON(1);
goto fail;
}
csum:
- item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0],
- struct btrfs_csum_item);
+ leaf = path->nodes[0];
+ item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_csum_item);
ret = 0;
item = (struct btrfs_csum_item *)((unsigned char *)item +
csum_offset * BTRFS_CRC32_SIZE);
found:
- btrfs_check_bounds(&item->csum, BTRFS_CRC32_SIZE,
- path->nodes[0]->b_data,
- root->fs_info->sb->s_blocksize);
+ /* FIXME!!!!!!!!!!!! */
ret = btrfs_csum_data(root, data, len, &item->csum);
btrfs_mark_buffer_dirty(path->nodes[0]);
fail:
btrfs_release_path(root, path);
btrfs_free_path(path);
return ret;
+#endif
}
int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
u64 isize)
{
struct btrfs_key key;
- struct btrfs_leaf *leaf = btrfs_buffer_leaf(path->nodes[0]);
+ struct extent_buffer *leaf = path->nodes[0];
int slot = path->slots[0];
int ret;
u32 new_item_size;
u64 new_item_span;
u64 blocks;
- btrfs_disk_key_to_cpu(&key, &leaf->items[slot].key);
+ btrfs_item_key_to_cpu(leaf, &key, slot);
if (isize <= key.offset)
return 0;
new_item_span = isize - key.offset;
- blocks = (new_item_span + root->blocksize - 1) >>
+ blocks = (new_item_span + root->sectorsize - 1) >>
root->fs_info->sb->s_blocksize_bits;
new_item_size = blocks * BTRFS_CRC32_SIZE;
- if (new_item_size >= btrfs_item_size(leaf->items + slot))
+ if (new_item_size >= btrfs_item_size_nr(leaf, slot))
return 0;
ret = btrfs_truncate_item(trans, root, path, new_item_size);
BUG_ON(ret);
return ret;
}
-int btrfs_csum_verify_file_block(struct btrfs_root *root,
- u64 objectid, u64 offset,
- char *data, size_t len)
-{
- int ret;
- struct btrfs_key file_key;
- struct btrfs_path *path;
- struct btrfs_csum_item *item;
- char result[BTRFS_CRC32_SIZE];
-
- path = btrfs_alloc_path();
- BUG_ON(!path);
- btrfs_init_path(path);
- file_key.objectid = objectid;
- file_key.offset = offset;
- file_key.flags = 0;
- btrfs_set_key_type(&file_key, BTRFS_CSUM_ITEM_KEY);
- mutex_lock(&root->fs_info->fs_mutex);
-
- item = btrfs_lookup_csum(NULL, root, path, objectid, offset, 0);
- if (IS_ERR(item)) {
- ret = PTR_ERR(item);
- /* a csum that isn't present is a preallocated region. */
- if (ret == -ENOENT || ret == -EFBIG)
- ret = -ENOENT;
- goto fail;
- }
-
- ret = btrfs_csum_data(root, data, len, result);
- WARN_ON(ret);
- if (memcmp(result, &item->csum, BTRFS_CRC32_SIZE))
- ret = 1;
-fail:
- btrfs_release_path(root, path);
- btrfs_free_path(path);
- mutex_unlock(&root->fs_info->fs_mutex);
- return ret;
-}
-
projects / deliverable / linux.git / blobdiff