Btrfs: run delayed directory updates during log replay

commit b6305567 upstream.

While we are resolving directory modifications in the
tree log, we are triggering delayed metadata updates to
the filesystem btrees.

This commit forces the delayed updates to run so the
replay code can find any modifications done.  It stops
us from crashing because the directory deleltion replay
expects items to be removed immediately from the tree.
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

fs/btrfs/tree-log.c

@@ -692,6 +692,8 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans,
 	kfree(name);
 
 	iput(inode);
+
+	btrfs_run_delayed_items(trans, root);
 	return ret;
 }
 
@@ -897,6 +899,7 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans,
 				ret = btrfs_unlink_inode(trans, root, dir,
 							 inode, victim_name,
 							 victim_name_len);
+				btrfs_run_delayed_items(trans, root);
 			}
 			kfree(victim_name);
 			ptr = (unsigned long)(victim_ref + 1) + victim_name_len;
@@ -1477,6 +1480,9 @@ static noinline int check_item_in_log(struct btrfs_trans_handle *trans,
 			ret = btrfs_unlink_inode(trans, root, dir, inode,
 						 name, name_len);
 			BUG_ON(ret);
+
+			btrfs_run_delayed_items(trans, root);
+
 			kfree(name);
 			iput(inode);