# \[PATCH bpf-next v2 0/2\] bpf: Allow bpf\_get\_netns\_cookie in BPF\_PROG\_TYPE\_CGROUP\_SOCKOPT

- From: Stanislav Fomichev \<hidden\>
- Date: 2021-08-12 15:30:18 
- List: netdev
- Page: https://ratatoskr.run/netdev/2021/08/7776478
- Thread: https://ratatoskr.run/netdev/2021/08/7776478/t.md

```text
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)).

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                        | 19 ++++++++++++++++
 tools/testing/selftests/bpf/verifier/ctx.c | 25 ++++++++++++++++++++++
 2 files changed, 44 insertions(+)

-- 
2.33.0.rc1.237.g0d66db33f3-goog

```