netdev - [PATCH net-next 0/2] gre: add sequence number for collect md mode.

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Date:   Wed, 28 Feb 2018 16:11:39 -0800
From:   William Tu <u9012063@...il.com>
To:     netdev@...r.kernel.org
Cc:     daniel@...earbox.net, ast@...nel.org
Subject: [PATCH net-next 0/2] gre: add sequence number for collect md mode.

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_GRE_SEQ' is added.  I name it
since GRE is the only tunnel type having sequence number.

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 |  4 ++--
 6 files changed, 23 insertions(+), 12 deletions(-)

-- 
2.7.4