commit e20f7334837ae47341d8ec4e3170d0b4336a3676
author John Fastabend <john.fastabend@gmail.com> Mon Apr 23 15:39:28 2018 -0700
committer Daniel Borkmann <daniel@iogearbox.net> Tue Apr 24 00:49:45 2018 +0200
tree 79f30f5474ae45cc9b5663316b6a5f0e1bedd028
parent ba6b8de423f8d0dee48d6030288ed81c03ddf9f0

bpf: sockmap, sk_wait_event needed to handle blocking cases

In the recvmsg handler we need to add a wait event to support the
blocking use cases. Without this we return zero and may confuse
user applications. In the wait event any data received on the
sk either via sk_receive_queue or the psock ingress list will
wake up the sock.

Fixes: fa246693a111 ("bpf: sockmap, BPF_F_INGRESS flag for BPF_SK_SKB_STREAM_VERDICT")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>