btrfs: check for error when looking up inode during dir entry replay

At replay_one_name(), we are treating any error from btrfs_lookup_inode()
as if the inode does not exists. Fix this by checking for an error and
returning it to the caller.

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>

diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 1bb5ebf1338304033f0298f4caf12c0f2821a1f7..b415c5ec03ea0642c4053c07fe857a2540f10a09 100644 (file)
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -1950,8 +1950,8 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans,
        struct btrfs_key log_key;
        struct inode *dir;
        u8 log_type;
-       int exists;
-       int ret = 0;
+       bool exists;
+       int ret;
        bool update_size = (key->type == BTRFS_DIR_INDEX_KEY);
        bool name_added = false;
 
@@ -1971,12 +1971,12 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans,
                   name_len);
 
        btrfs_dir_item_key_to_cpu(eb, di, &log_key);
-       exists = btrfs_lookup_inode(trans, root, path, &log_key, 0);
-       if (exists == 0)
-               exists = 1;
-       else
-               exists = 0;
+       ret = btrfs_lookup_inode(trans, root, path, &log_key, 0);
        btrfs_release_path(path);
+       if (ret < 0)
+               goto out;
+       exists = (ret == 0);
+       ret = 0;
 
        if (key->type == BTRFS_DIR_ITEM_KEY) {
                dst_di = btrfs_lookup_dir_item(trans, root, path, key->objectid,