netdev - Re: [PATCH v7 net-next 2/6] bpf: Add new cgroup attach type to enable sock modifications

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Date:   Thu, 1 Dec 2016 08:56:37 -0800
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     David Ahern <dsa@...ulusnetworks.com>
Cc:     netdev@...r.kernel.org, daniel@...que.org, ast@...com,
        daniel@...earbox.net, maheshb@...gle.com, tgraf@...g.ch
Subject: Re: [PATCH v7 net-next 2/6] bpf: Add new cgroup attach type to
 enable sock modifications

On Thu, Dec 01, 2016 at 08:48:04AM -0800, David Ahern wrote:
> Add new cgroup based program type, BPF_PROG_TYPE_CGROUP_SOCK. Similar to
> BPF_PROG_TYPE_CGROUP_SKB programs can be attached to a cgroup and run
> any time a process in the cgroup opens an AF_INET or AF_INET6 socket.
> Currently only sk_bound_dev_if is exported to userspace for modification
> by a bpf program.
> 
> This allows a cgroup to be configured such that AF_INET{6} sockets opened
> by processes are automatically bound to a specific device. In turn, this
> enables the running of programs that do not support SO_BINDTODEVICE in a
> specific VRF context / L3 domain.
> 
> Signed-off-by: David Ahern <dsa@...ulusnetworks.com>

Acked-by: Alexei Starovoitov <ast@...nel.org>