Re: [PATCH v7 net-next 2/6] bpf: Add new cgroup attach type to enable sock modifications
From: Alexei Starovoitov <hidden>
Date: 2016-12-01 18:00:47
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 <redacted>Acked-by: Alexei Starovoitov <ast@kernel.org>