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Btrfs: return value of btrfs_read_buffer is checked correctly 

btrfs_read_buffer() has the possibility of returning the error.
Therefore, I add the code in which the return value of btrfs_read_buffer()
is checked.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
This commit is contained in:
Tsutomu Itoh 2012-05-29 18:10:13 +09:00 committed by Josef Bacik
parent 733f4fbbc1
commit 018642a1f1
2 changed files with 18 additions and 4 deletions
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6
fs/btrfs/ctree.c
View File

@ -739,7 +739,11 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
if (!cur)
return -EIO;
} else if (!uptodate) {
btrfs_read_buffer(cur, gen);
err = btrfs_read_buffer(cur, gen);
if (err) {
free_extent_buffer(cur);
return err;
}
}
}
if (search_start == 0)

16
fs/btrfs/tree-log.c
View File

@ -1628,7 +1628,9 @@ static int replay_one_buffer(struct btrfs_root *log, struct extent_buffer *eb,
int i;
int ret;
btrfs_read_buffer(eb, gen);
ret = btrfs_read_buffer(eb, gen);
if (ret)
return ret;
level = btrfs_header_level(eb);
@ -1749,7 +1751,11 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
path->slots[*level]++;
if (wc->free) {
btrfs_read_buffer(next, ptr_gen);
ret = btrfs_read_buffer(next, ptr_gen);
if (ret) {
free_extent_buffer(next);
return ret;
}
btrfs_tree_lock(next);
btrfs_set_lock_blocking(next);
@ -1766,7 +1772,11 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
free_extent_buffer(next);
continue;
}
btrfs_read_buffer(next, ptr_gen);
ret = btrfs_read_buffer(next, ptr_gen);
if (ret) {
free_extent_buffer(next);
return ret;
}
WARN_ON(*level <= 0);
if (path->nodes[*level-1])