From: Willem de Bruijn <willemdebruijn.ker...@gmail.com> Date: Fri, 25 Jan 2019 11:17:23 -0500
> From: Willem de Bruijn <will...@google.com> > > Accept MSG_ZEROCOPY in all the TCP states that allow sendmsg. Remove > the explicit check for ESTABLISHED and CLOSE_WAIT states. > > This requires correctly handling zerocopy state (uarg, sk_zckey) in > all paths reachable from other TCP states. Such as the EPIPE case > in sk_stream_wait_connect, which a sendmsg() in incorrect state will > now hit. Most paths are already safe. > > Only extension needed is for TCP Fastopen active open. This can build > an skb with data in tcp_send_syn_data. Pass the uarg along with other > fastopen state, so that this skb also generates a zerocopy > notification on release. > > Tested with active and passive tcp fastopen packetdrill scripts at > https://github.com/wdebruij/packetdrill/commit/1747eef03d25a2404e8132817d0f1244fd6f129d > > Signed-off-by: Willem de Bruijn <will...@google.com> Applied, thanks.
