linux-kernel - [PATCH bpf-next 0/2] Get ifindex in BPF_SK

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Message-Id: <20211015112336.1973229-1-markpash@cloudflare.com>
Date:   Fri, 15 Oct 2021 12:23:28 +0100
From:   Mark Pashmfouroush <markpash@...udflare.com>
To:     markpash@...udflare.com
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        Shuah Khan <shuah@...nel.org>,
        Brendan Jackman <jackmanb@...gle.com>,
        Florent Revest <revest@...omium.org>,
        Joe Stringer <joe@...ium.io>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Lorenz Bauer <lmb@...udflare.com>,
        Dave Marchevsky <davemarchevsky@...com>,
        Björn Töpel <bjorn@...nel.org>,
        Luke Nelson <luke.r.nels@...il.com>, netdev@...r.kernel.org,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: [PATCH bpf-next 0/2] Get ifindex in BPF_SK_LOOKUP prog type

BPF_SK_LOOKUP users may want to have access to the ifindex of the skb
which triggered the socket lookup. This may be useful for selectively
applying programmable socket lookup logic to packets that arrive on a
specific interface, or excluding packets from an interface.

Mark Pashmfouroush (2):
  bpf: Add ifindex to bpf_sk_lookup
  selftests/bpf: Add tests for accessing ifindex in bpf_sk_lookup

 include/linux/filter.h                        |  7 ++--
 include/uapi/linux/bpf.h                      |  1 +
 net/core/filter.c                             |  7 ++++
 net/ipv4/inet_hashtables.c                    |  8 ++---
 net/ipv4/udp.c                                |  8 ++---
 net/ipv6/inet6_hashtables.c                   |  8 ++---
 net/ipv6/udp.c                                |  8 ++---
 tools/include/uapi/linux/bpf.h                |  1 +
 .../selftests/bpf/prog_tests/sk_lookup.c      | 31 ++++++++++++++++++
 .../selftests/bpf/progs/test_sk_lookup.c      |  8 +++++
 .../selftests/bpf/verifier/ctx_sk_lookup.c    | 32 +++++++++++++++++++
 11 files changed, 101 insertions(+), 18 deletions(-)

-- 
2.31.1