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Btrfs: fix wrong file extent length 

There are two types of the file extent - inline extent and regular extent,
When we log file extents, we didn't take inline extent into account, fix it.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Miao Xie 2012-11-01 07:33:59 +00:00 committed by Josef Bacik
parent ca46963718
commit 315a9850da
3 changed files with 23 additions and 9 deletions
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1
fs/btrfs/ctree.h
View File

@ -3263,6 +3263,7 @@ int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path, u64 objectid,
u64 bytenr, int mod);
u64 btrfs_file_extent_length(struct btrfs_path *path);
int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_ordered_sum *sums);

21
fs/btrfs/file-item.c
View File

@ -133,7 +133,6 @@ fail:
return ERR_PTR(ret);
}
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path, u64 objectid,
@ -151,6 +150,26 @@ int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
return ret;
}
u64 btrfs_file_extent_length(struct btrfs_path *path)
{
int extent_type;
struct btrfs_file_extent_item *fi;
u64 len;
fi = btrfs_item_ptr(path->nodes[0], path->slots[0],
struct btrfs_file_extent_item);
extent_type = btrfs_file_extent_type(path->nodes[0], fi);
if (extent_type == BTRFS_FILE_EXTENT_REG ||
extent_type == BTRFS_FILE_EXTENT_PREALLOC)
len = btrfs_file_extent_num_bytes(path->nodes[0], fi);
else if (extent_type == BTRFS_FILE_EXTENT_INLINE)
len = btrfs_file_extent_inline_len(path->nodes[0], fi);
else
BUG();
return len;
}
static int __btrfs_lookup_bio_sums(struct btrfs_root *root,
struct inode *inode, struct bio *bio,

10
fs/btrfs/tree-log.c
View File

@ -3143,7 +3143,6 @@ static int log_one_extent(struct btrfs_trans_handle *trans,
struct btrfs_path *dst_path, struct log_args *args)
{
struct btrfs_root *log = root->log_root;
struct btrfs_file_extent_item *fi;
struct btrfs_key key;
u64 start = em->mod_start;
u64 search_start = start;
@ -3199,10 +3198,7 @@ again:
}
} while (key.offset > start);
fi = btrfs_item_ptr(path->nodes[0], path->slots[0],
struct btrfs_file_extent_item);
num_bytes = btrfs_file_extent_num_bytes(path->nodes[0],
fi);
num_bytes = btrfs_file_extent_length(path);
if (key.offset + num_bytes <= start) {
btrfs_release_path(path);
return -ENOENT;
@ -3211,8 +3207,7 @@ again:
args->src = path->nodes[0];
next_slot:
btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
fi = btrfs_item_ptr(args->src, path->slots[0],
struct btrfs_file_extent_item);
num_bytes = btrfs_file_extent_length(path);
if (args->nr &&
args->start_slot + args->nr == path->slots[0]) {
args->nr++;
@ -3230,7 +3225,6 @@ next_slot:
}
nritems = btrfs_header_nritems(path->nodes[0]);
path->slots[0]++;
num_bytes = btrfs_file_extent_num_bytes(args->src, fi);
if (len < num_bytes) {
/* I _think_ this is ok, envision we write to a
* preallocated space that is adjacent to a previously