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@xxxxxxxxx>
v5:
- fix bpf_dynptr_get_data's incorrect usage of bpf_dynptr_kern's size
spotted by Joanne Koong <joannelkoong@xxxxxxxxx>
v6:
- Simplify bpf_dynptr_get_data's interface and make it inline
suggested by John Fastabend <john.fastabend@xxxxxxxxx>
- Simplify bpf_skb_set_tunnel_opt_dynptr's interface, removing the
superfluous 'len' parameter
suggested by Andrii Nakryiko <andrii.nakryiko@xxxxxxxxx>
- Fix missing retcodes in progs/test_tunnel_kern.c
spotted by John Fastabend <john.fastabend@xxxxxxxxx>
Shmulik Ladkani (4):
bpf: Export 'bpf_dynptr_get_data, bpf_dynptr_get_size' helpers
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 | 6 +
include/uapi/linux/bpf.h | 11 +
kernel/bpf/helpers.c | 2 +-
net/core/filter.c | 31 ++-
tools/include/uapi/linux/bpf.h | 11 +
.../selftests/bpf/prog_tests/test_tunnel.c | 131 +++++++++--
.../selftests/bpf/progs/test_tunnel_kern.c | 212 ++++++++++++------
7 files changed, 318 insertions(+), 86 deletions(-)
--
2.37.3
