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btrfs: deal with errors when replaying dir entry during log replay

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commit e15ac64137 upstream.

At replay_one_one(), we are treating any error returned from
btrfs_lookup_dir_item() or from btrfs_lookup_dir_index_item() as meaning
that there is no existing directory entry in the fs/subvolume tree.
This is not correct since we can get errors such as, for example, -EIO
when reading extent buffers while searching the fs/subvolume's btree.

So fix that and return the error to the caller when it is not -ENOENT.

CC: stable@vger.kernel.org # 4.14+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Filipe Manana 2021-10-01 13:52:31 +01:00 • committed by Greg Kroah-Hartman
commit 95d3aba5fe
1 changed files with 8 additions and 1 deletions
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9
fs/btrfs/tree-log.c
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@ -1938,7 +1938,14 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans,
ret = -EINVAL;
goto out;
}
if (IS_ERR_OR_NULL(dst_di)) {
if (dst_di == ERR_PTR(-ENOENT))
dst_di = NULL;
if (IS_ERR(dst_di)) {
ret = PTR_ERR(dst_di);
goto out;
} else if (!dst_di) {
/* we need a sequence number to insert, so we only
* do inserts for the BTRFS_DIR_INDEX_KEY types
*/