btrfs: check if the transaction was aborted at btrfs_wait_for_commit()

At btrfs_wait_for_commit() we wait for a transaction to finish and then
always return 0 (success) without checking if it was aborted, in which
case the transaction didn't happen due to some critical error. Fix this
by checking if the transaction was aborted.

Fixes: 462045928bda ("Btrfs: add START_SYNC, WAIT_SYNC ioctls")
CC: stable@vger.kernel.org # 4.19+
Reviewed-by: Qu Wenruo <wqu@suse.com>
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/transaction.c b/fs/btrfs/transaction.c
index cf306351b148247c0248e09d9004e17e5a638d2d..f11d803b2c4e5be798b93bc1e6b7e9a223d4a059 100644 (file)
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -931,6 +931,7 @@ int btrfs_wait_for_commit(struct btrfs_fs_info *fs_info, u64 transid)
        }
 
        wait_for_commit(cur_trans, TRANS_STATE_COMPLETED);
+       ret = cur_trans->aborted;
        btrfs_put_transaction(cur_trans);
 out:
        return ret;