netdev - Re: [PATCH bpf-next 1/2] bpf: allow to retrieve sol_socket opts from sock

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Message-ID: <02b5fea5-2790-51aa-1bf1-862de6a9f271@fb.com>
Date:   Mon, 11 Jan 2021 12:03:25 -0800
From:   Yonghong Song <yhs@...com>
To:     Daniel Borkmann <daniel@...earbox.net>, <ast@...nel.org>
CC:     <bpf@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: Re: [PATCH bpf-next 1/2] bpf: allow to retrieve sol_socket opts from
 sock_addr progs



On 1/11/21 8:17 AM, Daniel Borkmann wrote:
> The _bpf_setsockopt() is able to set some of the SOL_SOCKET level options,
> however, _bpf_getsockopt() has little support to actually retrieve them.
> This small patch adds few misc options such as SO_MARK, SO_PRIORITY and
> SO_BINDTOIFINDEX. For the latter getter and setter are added. The mark and
> priority in particular allow to retrieve the options from BPF cgroup hooks
> to then implement custom behavior / settings on the syscall hooks compared
> to other sockets that stick to the defaults, for example.
> 
> Signed-off-by: Daniel Borkmann <daniel@...earbox.net>

Acked-by: Yonghong Song <yhs@...com>