netdev - [PATCH bpf-next 0/2] Split bpf_sock dst

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Date:   Thu, 27 Jan 2022 18:24:46 +0100
From:   Jakub Sitnicki <jakub@...udflare.com>
To:     bpf@...r.kernel.org
Cc:     netdev@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Menglong Dong <imagedong@...cent.com>,
        Martin KaFai Lau <kafai@...com>
Subject: [PATCH bpf-next 0/2] Split bpf_sock dst_port field

This is a follow-up to discussion around the idea of making dst_port in struct
bpf_sock a 16-bit field that happened in [1]. I have fleshed it out further:

v1:
- keep dst_field offset unchanged to prevent existing BPF program breakage
  (Martin)
- allow 8-bit loads from dst_port[0] and [1]
- add test coverage for the verifier and the context access converter

[1] https://lore.kernel.org/bpf/87sftbobys.fsf@cloudflare.com/

Jakub Sitnicki (2):
  bpf: Make dst_port field in struct bpf_sock 16-bit wide
  selftests/bpf: Extend verifier and bpf_sock tests for dst_port loads

 include/uapi/linux/bpf.h                      |  3 +-
 net/core/filter.c                             |  9 ++-
 tools/include/uapi/linux/bpf.h                |  3 +-
 .../selftests/bpf/prog_tests/sock_fields.c    | 58 +++++++++----
 .../selftests/bpf/progs/test_sock_fields.c    | 41 ++++++++++
 tools/testing/selftests/bpf/verifier/sock.c   | 81 ++++++++++++++++++-
 6 files changed, 172 insertions(+), 23 deletions(-)

-- 
2.31.1