[v3,bpf-next,0/3] bpf: Support setting variable-length tunnel options

Message

Shmulik Ladkani Aug. 22, 2022, 5:21 a.m. UTC

Introduce 'skb_set_var_tunnel_opt' 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

Shmulik Ladkani (3):
  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_var_tunnel_opt test-case to
    test_progs

 include/uapi/linux/bpf.h                      |  12 ++
 net/core/filter.c                             |  34 +++-
 tools/include/uapi/linux/bpf.h                |  12 ++
 .../selftests/bpf/prog_tests/test_tunnel.c    | 131 +++++++++++--
 .../selftests/bpf/progs/test_tunnel_kern.c    | 182 ++++++++++++------
 5 files changed, 290 insertions(+), 81 deletions(-)