... actually, for patch 2, I wonder whether that works properly if there is a device inside shiftfs. It might not be relevant from a security perspective, I'm not sure, but I think checking for `file->f_op.open == shiftfs_open` might be better.
... actually, for patch 2, I wonder whether that works properly if there is a device inside shiftfs. It might not be relevant from a security perspective, I'm not sure, but I think checking for `file->f_op.open == shiftfs_open` might be better.