Btrfs: cleanup transaction on abort

If we abort not during a transaction commit we won't clean up anything until we
unmount.  Unfortunately if we abort in the middle of writing out an ordered
extent we won't clean it up and if somebody is waiting on that ordered extent
they will wait forever.  To fix this just make the transaction kthread call the
cleanup transaction stuff if it notices theres an error, and make
btrfs_end_transaction wake up the transaction kthread if there is an error.
Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

2 files changed, 6 insertions, 1 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index db2095486a4f..113cd43530ba 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1800,6 +1800,9 @@ sleep:
                 wake_up_process(root->fs_info->cleaner_kthread);
                 mutex_unlock(&root->fs_info->transaction_kthread_mutex);
 
+                if (unlikely(test_bit(BTRFS_FS_STATE_ERROR,
+                                      &root->fs_info->fs_state)))
+                        btrfs_cleanup_transaction(root);
                 if (!try_to_freeze()) {
                         set_current_state(TASK_INTERRUPTIBLE);
                         if (!kthread_should_stop() &&
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 7138d6a3726e..a1343e81c59d 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -744,8 +744,10 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
                 btrfs_run_delayed_iputs(root);
 
         if (trans->aborted ||
-            test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state))
+            test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state)) {
+                wake_up_process(info->transaction_kthread);
                 err = -EIO;
+        }
         assert_qgroups_uptodate(trans);
 
         kmem_cache_free(btrfs_trans_handle_cachep, trans);