btrfs: abort transaction after failed inode updates in create_subvol

[ Upstream commit c7e54b5102bf3614cadb9ca32d7be73bad6cecf0 ]

We can just abort the transaction here, and in fact do that for every
other failure in this function except these two cases.

CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index dd3b4820ac30d68b91e9bb1264849ff537b0f6de..e82b4f3f490c1bbf7c855d8668f6c8f754cd8a7d 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -580,12 +580,18 @@ static noinline int create_subvol(struct inode *dir,
 
        btrfs_i_size_write(BTRFS_I(dir), dir->i_size + namelen * 2);
        ret = btrfs_update_inode(trans, root, dir);
-       BUG_ON(ret);
+       if (ret) {
+               btrfs_abort_transaction(trans, ret);
+               goto fail;
+       }
 
        ret = btrfs_add_root_ref(trans, fs_info,
                                 objectid, root->root_key.objectid,
                                 btrfs_ino(BTRFS_I(dir)), index, name, namelen);
-       BUG_ON(ret);
+       if (ret) {
+               btrfs_abort_transaction(trans, ret);
+               goto fail;
+       }
 
        ret = btrfs_uuid_tree_add(trans, fs_info, root_item->uuid,
                                  BTRFS_UUID_KEY_SUBVOL, objectid);