Add support for defragging files via btrfsctl -d. Avoid OOM on extent tree

defrag.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index da6bb72750f2..714fa877438b 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -26,9 +26,11 @@
 enum btrfs_bh_state_bits {
         BH_Checked = BH_PrivateStart,
         BH_Defrag,
+        BH_DefragDone,
 };
 BUFFER_FNS(Checked, checked);
 BUFFER_FNS(Defrag, defrag);
+BUFFER_FNS(DefragDone, defrag_done);
 
 static inline struct btrfs_node *btrfs_buffer_node(struct buffer_head *bh)
 {