On Mon, Feb 19, 2018 at 06:09:39PM +0100, Phil Sutter wrote: > What puzzles me about your argumentation is that you seem to propose for > the kernel to cover up flaws in userspace. Spinning this concept further > would mean that if there would be an old bug in iproute2 we should think > of adding a workaround to rtnetlink interface in kernel because > containers will keep the old iproute2 binary? Or am I (hopefully) just > missing your point? Actually, that's what we already do. This is from rtnl_dump_ifinfo(): /* A hack to preserve kernel<->userspace interface. * The correct header is ifinfomsg. It is consistent with rtnl_getlink. * However, before Linux v3.9 the code here assumed rtgenmsg and that's * what iproute2 < v3.9.0 used. * We can detect the old iproute2. Even including the IFLA_EXT_MASK * attribute, its netlink message is shorter than struct ifinfomsg. */ (There are, in fact, even current tools using rtgenmsg but that's another story.) Michal Kubecek -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
