Merge branch 'Introduce bpf_ct_set_nat_info kfunc helper'

Merge branch 'Introduce bpf_ct_set_nat_info kfunc helper'

Lorenzo Bianconi says:

====================

Introduce bpf_ct_set_nat_info kfunc helper in order to set source and
destination nat addresses/ports in a new allocated ct entry not inserted
in the connection tracking table yet.
Introduce support for per-parameter trusted args.

Changes since v2:
- use int instead of a pointer for port in bpf_ct_set_nat_info signature
- modify KF_TRUSTED_ARGS definition in order to referenced pointer constraint
  just for PTR_TO_BTF_ID
- drop patch 2/4

Changes since v1:
- enable CONFIG_NF_NAT in tools/testing/selftests/bpf/config

Kumar Kartikeya Dwivedi (1):
  bpf: Tweak definition of KF_TRUSTED_ARGS
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>