[PATCH v4 bpf-next 0/4] bpf: Support setting variable-length tunnel options

[Shmulik Ladkani <shmulik@metanetworks.com>]

Introduce 'skb_set_tunnel_opt_dynptr' to allow setting tunnel options of
dynamic length.

v2:
- Place test_tunnel's local route in a custom table, to ensure the IP
  isn't considered assigned to a device.
v3:
- Avoid 'inline' for the __bpf_skb_set_tunopt helper function
v4:
- change API to be based on bpf_dynptr,
  suggested by John Fastabend <john.fastabend@gmail.com>

Shmulik Ladkani (4):
  bpf: Add 'bpf_dynptr_get_data' helper
  bpf: Support setting variable-length tunnel options
  selftests/bpf: Simplify test_tunnel setup for allowing non-local
    tunnel traffic
  selftests/bpf: Add geneve with bpf_skb_set_tunnel_opt_dynptr test-case
    to test_progs

 include/linux/bpf.h                           |   1 +
 include/uapi/linux/bpf.h                      |  12 ++
 kernel/bpf/helpers.c                          |  10 +
 net/core/filter.c                             |  36 +++-
 tools/include/uapi/linux/bpf.h                |  12 ++
 .../selftests/bpf/prog_tests/test_tunnel.c    | 131 ++++++++++--
 .../selftests/bpf/progs/test_tunnel_kern.c    | 200 ++++++++++++------
 7 files changed, 322 insertions(+), 80 deletions(-)

-- 
2.37.2