From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f66.google.com ([74.125.83.66]:45485 "EHLO mail-pg0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1162173AbeCAVuZ (ORCPT ); Thu, 1 Mar 2018 16:50:25 -0500 Received: by mail-pg0-f66.google.com with SMTP id i133so2874220pgc.12 for ; Thu, 01 Mar 2018 13:50:25 -0800 (PST) From: William Tu To: netdev@vger.kernel.org Cc: daniel@iogearbox.net, ast@kernel.org Subject: [PATCHv2 net-next 0/2] gre: add sequence number for collect md mode. Date: Thu, 1 Mar 2018 13:49:56 -0800 Message-Id: <1519940998-3885-1-git-send-email-u9012063@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: Currently GRE sequence number can only be used in native tunnel mode. The first patch adds sequence number support for gre collect metadata mode, and the second patch tests it using BPF. RFC2890 defines GRE sequence number to be specific to the traffic flow identified by the key. However, this patch does not implement per-key seqno. The sequence number is shared in the same tunnel device. That is, different tunnel keys using the same collect_md tunnel share single sequence number. A new BFP uapi tunnel flag 'BPF_F_SEQ_NUMBER' is added. -- v1->v2: rename BPF_F_GRE_SEQ to BPF_F_SEQ_NUMBER suggested by Daniel -- William Tu (2): gre: add sequence number for collect md mode. samples/bpf: add gre sequence number test. include/uapi/linux/bpf.h | 1 + net/core/filter.c | 4 +++- net/ipv4/ip_gre.c | 7 +++++-- net/ipv6/ip6_gre.c | 13 ++++++++----- samples/bpf/tcbpf2_kern.c | 6 ++++-- samples/bpf/test_tunnel_bpf.sh | 5 +++-- 6 files changed, 24 insertions(+), 12 deletions(-) -- 2.7.4