netdev - [PATCH bpf-next v3 0/2] bpf: Allow bpf_get_netns_cookie in BPF_PROG_TYPE_CGROUP

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Message-Id: <20210813230530.333779-1-sdf@google.com>
Date:   Fri, 13 Aug 2021 16:05:28 -0700
From:   Stanislav Fomichev <sdf@...gle.com>
To:     netdev@...r.kernel.org, bpf@...r.kernel.org
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        Stanislav Fomichev <sdf@...gle.com>
Subject: [PATCH bpf-next v3 0/2] bpf: Allow bpf_get_netns_cookie in BPF_PROG_TYPE_CGROUP_SOCKOPT

We'd like to be able to identify netns from setsockopt hooks
to be able to do the enforcement of some options only in the
"initial" netns (to give users the ability to create clear/isolated
sandboxes if needed without any enforcement by doing unshare(net)).

v3:
- remove extra 'ctx->skb == NULL' check (Martin KaFai Lau)
- rework test to make sure the helper is really called, not just
  verified

v2:
- add missing CONFIG_NET

Stanislav Fomichev (2):
  bpf: Allow bpf_get_netns_cookie in BPF_PROG_TYPE_CGROUP_SOCKOPT
  selftests/bpf: verify bpf_get_netns_cookie in
    BPF_PROG_TYPE_CGROUP_SOCKOPT

 kernel/bpf/cgroup.c                            | 18 ++++++++++++++++++
 tools/testing/selftests/bpf/progs/sockopt_sk.c | 16 ++++++++++++++++
 2 files changed, 34 insertions(+)

-- 
2.33.0.rc1.237.g0d66db33f3-goog