btrfs: assert on non-empty delayed iputs

I ran into an issue where there was some reference being held on an
inode that I couldn't track.  This assert wasn't triggered, but it at
least rules out we're doing something stupid.

Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 27f6a3348f945d4f7ca1a3f723a1dd3078f32d75..b0ab41da91d122b8cd8c8010cd56973af2afd240 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3976,6 +3976,7 @@ void close_ctree(struct btrfs_fs_info *fs_info)
        kthread_stop(fs_info->transaction_kthread);
        kthread_stop(fs_info->cleaner_kthread);
 
+       ASSERT(list_empty(&fs_info->delayed_iputs));
        set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags);
 
        btrfs_free_qgroup_config(fs_info);