Btrfs: Create orphan inode records to prevent lost files after a crash

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index 9f2a4ef..df624fd 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -39,6 +39,9 @@
 	struct posix_acl *i_acl;
 	struct posix_acl *i_default_acl;
 
+	/* for keeping track of orphaned inodes */
+	struct list_head i_orphan;
+
 	/*
 	 * transid of the trans_handle that last modified this inode
 	 */