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Date: Fri, 25 Nov 2022 23:29:47 +0100 From: Matthieu Baerts <matthieu.baerts@...sares.net> To: Mat Martineau <mathew.j.martineau@...ux.intel.com>, Matthieu Baerts <matthieu.baerts@...sares.net>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com> Cc: Dmytro Shytyi <dmytro@...tyi.net>, Benjamin Hesmans <benjamin.hesmans@...sares.net>, netdev@...r.kernel.org, mptcp@...ts.linux.dev, linux-kernel@...r.kernel.org Subject: [PATCH net-next 1/8] mptcp: add MSG_FASTOPEN sendmsg flag support From: Dmytro Shytyi <dmytro@...tyi.net> Since commit 54f1944ed6d2 ("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@...sares.net> Signed-off-by: Benjamin Hesmans <benjamin.hesmans@...sares.net> Acked-by: Paolo Abeni <pabeni@...hat.com> Signed-off-by: Dmytro Shytyi <dmytro@...tyi.net> Signed-off-by: Matthieu Baerts <matthieu.baerts@...sares.net> --- net/mptcp/protocol.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 3796d1bfef6b..37876e06d4c4 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -1711,17 +1711,14 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) int ret = 0; long timeo; - /* we don't support FASTOPEN yet */ - if (msg->msg_flags & MSG_FASTOPEN) - return -EOPNOTSUPP; - /* 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); 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; ret = mptcp_sendmsg_fastopen(sk, ssock->sk, msg, len, &copied_syn); -- 2.37.2
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