[PATCH net-next 0/3] gre: add collect_md mode for ERSPAN tunnel

[William Tu <u9012063@gmail.com>]

This patch series provide collect_md mode for ERSPAN tunnel.  The fist patch
refactors the existing gre_fb_xmit function by exacting the route cache
portion into a new function called prepare_fb_xmit.  The second patch
introduces the collect_md mode for ERSPAN tunnel, by calling the
prepare_fb_xmit function and adding ERSPAN specific logic.  The final patch
adds the test case using bpf_skb_{set,get}_tunnel_{key,opt}.

Thank you

William Tu (3):
  gre: refactor the gre_fb_xmit
  gre: add collect_md mode to ERSPAN tunnel
  samples/bpf: extend test_tunnel_bpf.sh with ERSPAN

 include/net/ip_tunnels.h       |   4 +-
 net/ipv4/ip_gre.c              | 157 ++++++++++++++++++++++++++++++++++++-----
 samples/bpf/tcbpf2_kern.c      |  63 ++++++++++++++++-
 samples/bpf/test_tunnel_bpf.sh |  29 ++++++++
 4 files changed, 232 insertions(+), 21 deletions(-)

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2.7.4