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

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Message-ID: <20210813232707.kk5l5ksirbgtr6pc@kafai-mbp>
Date:   Fri, 13 Aug 2021 16:27:07 -0700
From:   Martin KaFai Lau <kafai@...com>
To:     Stanislav Fomichev <sdf@...gle.com>
CC:     <netdev@...r.kernel.org>, <bpf@...r.kernel.org>, <ast@...nel.org>,
        <daniel@...earbox.net>, <andrii@...nel.org>
Subject: Re: [PATCH bpf-next v3 0/2] bpf: Allow bpf_get_netns_cookie in
 BPF_PROG_TYPE_CGROUP_SOCKOPT

On Fri, Aug 13, 2021 at 04:05:28PM -0700, Stanislav Fomichev wrote:
> 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
Acked-by: Martin KaFai Lau <kafai@...com>