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mptcp: add MSG_FASTOPEN sendmsg flag support

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Since commit 54f1944ed6 ("mptcp: factor out mptcp_connect()"), all the
infrastructure is now in place to support the MSG_FASTOPEN flag, we
just need to call into the fastopen path in mptcp_sendmsg().

Co-developed-by: Benjamin Hesmans <benjamin.hesmans@tessares.net>
Signed-off-by: Benjamin Hesmans <benjamin.hesmans@tessares.net>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Dmytro Shytyi <dmytro@shytyi.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Dmytro Shytyi 2022-11-25 23:29:47 +01:00 committed by Jakub Kicinski
parent f2bb566f5c
commit 1e777f39b4
1 changed files with 3 additions and 6 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

9
net/mptcp/protocol.c
View file

@ -1711,17 +1711,14 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
int ret = 0; int ret = 0;
long timeo; long timeo;
/* we don't support FASTOPEN yet */
if (msg->msg_flags & MSG_FASTOPEN)
return -EOPNOTSUPP;
/* silently ignore everything else */ /* silently ignore everything else */
msg->msg_flags &= MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL; msg->msg_flags &= MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | MSG_FASTOPEN;
lock_sock(sk); lock_sock(sk);
ssock = __mptcp_nmpc_socket(msk); ssock = __mptcp_nmpc_socket(msk);
if (unlikely(ssock && inet_sk(ssock->sk)->defer_connect)) { if (unlikely(ssock && (inet_sk(ssock->sk)->defer_connect ||
msg->msg_flags & MSG_FASTOPEN))) {
int copied_syn = 0; int copied_syn = 0;
ret = mptcp_sendmsg_fastopen(sk, ssock->sk, msg, len, &copied_syn); ret = mptcp_sendmsg_fastopen(sk, ssock->sk, msg, len, &copied_syn);