diff options
| author | John Fastabend <john.fastabend@gmail.com> | 2018-03-28 12:49:15 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-03-30 00:09:43 +0200 |
| commit | 8934ce2fd08171e8605f7fada91ee7619fe17ab8 (patch) | |
| tree | 9a75574aadb3cfad15d09bffa0fe9eb6cbd9a03d /net/core | |
| parent | 22527437e0a0c96ee3153e9d0382942b0fd4f9dd (diff) | |
| download | linux-8934ce2fd08171e8605f7fada91ee7619fe17ab8.tar.bz2 | |
bpf: sockmap redirect ingress support
Add support for the BPF_F_INGRESS flag in sk_msg redirect helper.
To do this add a scatterlist ring for receiving socks to check
before calling into regular recvmsg call path. Additionally, because
the poll wakeup logic only checked the skb recv queue we need to
add a hook in TCP stack (similar to write side) so that we have
a way to wake up polling socks when a scatterlist is redirected
to that sock.
After this all that is needed is for the redirect helper to
push the scatterlist into the psock receive queue.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/filter.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index afd825534ac4..a5a995e5b380 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -1894,7 +1894,7 @@ BPF_CALL_4(bpf_msg_redirect_map, struct sk_msg_buff *, msg, struct bpf_map *, map, u32, key, u64, flags) { /* If user passes invalid input drop the packet. */ - if (unlikely(flags)) + if (unlikely(flags & ~(BPF_F_INGRESS))) return SK_DROP; msg->key = key; |