From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: [PATCH net-next v4 0/2] net: vrf: Fixup PKTINFO to return enslaved device index Date: Tue, 10 May 2016 11:19:49 -0700 Message-ID: <1462904391-1253-1-git-send-email-dsa@cumulusnetworks.com> Cc: David Ahern To: netdev@vger.kernel.org Return-path: Received: from mail-pf0-f172.google.com ([209.85.192.172]:35865 "EHLO mail-pf0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751337AbcEJST6 (ORCPT ); Tue, 10 May 2016 14:19:58 -0400 Received: by mail-pf0-f172.google.com with SMTP id c189so8828457pfb.3 for ; Tue, 10 May 2016 11:19:58 -0700 (PDT) Sender: netdev-owner@vger.kernel.org List-ID: Applications such as OSPF and BFD need the original ingress device not the VRF device; the latter can be derived from the former. To that end move the packet intercept from an rx handler that is invoked by __netif_receive_skb_core to the ipv4 and ipv6 receive processing. IPv6 already saves the skb_iif to the control buffer in ipv6_rcv. Since the skb->dev has not been switched the cb has the enslaved device. Make the same happen for IPv4 by adding the skb_iif to inet_skb_parm and set it in ipv4 code after clearing the skb control buffer similar to IPv6. >>From there the pktinfo can just pull it from cb with the PKTINFO_SKB_CB cast. David Ahern (2): net: l3mdev: Add hook in ip and ipv6 net: original ingress device index in PKTINFO drivers/net/vrf.c | 189 ++++++++++++++++++++++------------------------ include/linux/ipv6.h | 17 ++++- include/linux/netdevice.h | 2 + include/net/ip.h | 1 + include/net/l3mdev.h | 42 +++++++++++ include/net/tcp.h | 4 +- net/core/dev.c | 3 +- net/ipv4/ip_input.c | 8 ++ net/ipv4/ip_sockglue.c | 7 +- net/ipv6/ip6_input.c | 7 ++ 10 files changed, 178 insertions(+), 102 deletions(-) -- 2.1.4