1 files changed, 15 insertions, 0 deletions

diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 978c3a810893..43c6781af654 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -5498,6 +5498,21 @@ record:
 }
 
 /*
+ * Make sure that if someone attempts to fsync the parent directory of a deleted
+ * snapshot, it ends up triggering a transaction commit. This is to guarantee
+ * that after replaying the log tree of the parent directory's root we will not
+ * see the snapshot anymore and at log replay time we will not see any log tree
+ * corresponding to the deleted snapshot's root, which could lead to replaying
+ * it after replaying the log tree of the parent directory (which would replay
+ * the snapshot delete operation).
+ */
+void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
+                                   struct inode *dir)
+{
+        BTRFS_I(dir)->last_unlink_trans = trans->transid;
+}
+
+/*
  * Call this after adding a new name for a file and it will properly
  * update the log to reflect the new name.
  *