netdev - Re: [PATCH net-next 2/3] bpf: Add new cgroups prog type to enable sock modifications

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Message-ID: <1477438787.7065.158.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Tue, 25 Oct 2016 16:39:47 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     David Ahern <dsa@...ulusnetworks.com>
Cc:     netdev@...r.kernel.org, daniel@...que.org, ast@...com,
        daniel@...earbox.net
Subject: Re: [PATCH net-next 2/3] bpf: Add new cgroups prog type to enable
 sock modifications

On Tue, 2016-10-25 at 15:30 -0700, 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.

Does this mean that these programs no longer can use loopback ?