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| author | David Ahern <dsa@cumulusnetworks.com> | 2016-12-01 08:48:04 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-12-02 13:46:08 -0500 |
| commit | 61023658760032e97869b07d54be9681d2529e77 (patch) | |
| tree | 9b10a9d2a8b5820450298f9bda8f3c23fbf66b57 /net/ipv6/af_inet6.c | |
| parent | b2cd12574aa3e1625f471ff57cde7f628a18a46b (diff) | |
| download | lwn-61023658760032e97869b07d54be9681d2529e77.tar.gz lwn-61023658760032e97869b07d54be9681d2529e77.zip | |
bpf: Add new cgroup attach type to enable sock modifications
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@cumulusnetworks.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/af_inet6.c')
| -rw-r--r-- | net/ipv6/af_inet6.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index d424f3a3737a..237e654ba717 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -258,6 +258,14 @@ lookup_protocol: goto out; } } + + if (!kern) { + err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk); + if (err) { + sk_common_release(sk); + goto out; + } + } out: return err; out_rcu_unlock: |