From: Benjamin Hesmans <benjamin.hesmans@tessares.net>
To: mptcp@lists.linux.dev
Cc: Benjamin Hesmans <benjamin.hesmans@tessares.net>
Subject: [PATCH RFC mptcp-next 04/10] mptcp: poll allow write call before actual connect
Date: Thu, 8 Sep 2022 15:38:23 +0200 [thread overview]
Message-ID: <20220908133829.3410092-5-benjamin.hesmans@tessares.net> (raw)
In-Reply-To: <20220908133829.3410092-1-benjamin.hesmans@tessares.net>
If fastopen is used, poll must allow a first write that will trigger
the SYN+data
Similar to what is done in tcp_poll().
Signed-off-by: Benjamin Hesmans <benjamin.hesmans@tessares.net>
---
net/mptcp/protocol.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index ad81824bdbfe..c249ce632c5f 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -3676,10 +3676,12 @@ static __poll_t mptcp_poll(struct file *file, struct socket *sock,
{
struct sock *sk = sock->sk;
struct mptcp_sock *msk;
+ struct socket *ssock;
__poll_t mask = 0;
int state;
msk = mptcp_sk(sk);
+ ssock = __mptcp_nmpc_socket(msk);
sock_poll_wait(file, sock, wait);
state = inet_sk_state_load(sk);
@@ -3694,6 +3696,9 @@ static __poll_t mptcp_poll(struct file *file, struct socket *sock,
if (state != TCP_SYN_SENT && state != TCP_SYN_RECV) {
mask |= mptcp_check_readable(msk);
mask |= mptcp_check_writeable(msk);
+ } else if (ssock && state == TCP_SYN_SENT && inet_sk(ssock->sk)->defer_connect) {
+ /* cf tcp_poll() note about TFO */
+ mask |= EPOLLOUT | EPOLLWRNORM;
}
if (sk->sk_shutdown == SHUTDOWN_MASK || state == TCP_CLOSE)
mask |= EPOLLHUP;
--
2.25.1
--
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next prev parent reply other threads:[~2022-09-08 13:38 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-08 13:38 [PATCH RFC mptcp-next 00/10] Implement TCP_FASTOPEN_CONNECT for mptcp Benjamin Hesmans
2022-09-08 13:38 ` [PATCH RFC mptcp-next 01/10] mptcp: add TCP_FASTOPEN_CONNECT socket option Benjamin Hesmans
2022-09-08 13:38 ` [PATCH RFC mptcp-next 02/10] tcp: export tcp_sendmsg_fastopen Benjamin Hesmans
2022-09-08 13:38 ` [PATCH RFC mptcp-next 03/10] mptcp: handle defer connect in mptcp_sendmsg Benjamin Hesmans
2022-09-08 13:38 ` Benjamin Hesmans [this message]
2022-09-08 13:38 ` [PATCH RFC mptcp-next 05/10] mptcp: delay mptcp data_ack calculation Benjamin Hesmans
2022-09-08 13:38 ` [PATCH RFC mptcp-next 06/10] mptcp: allow delayed " Benjamin Hesmans
2022-09-08 13:38 ` [PATCH RFC mptcp-next 07/10] mptcp: TFO receive: bypass mapping check Benjamin Hesmans
2022-09-08 13:38 ` [PATCH RFC mptcp-next 08/10] mptcp: allow data that can not be DATA_ACKed Benjamin Hesmans
2022-09-08 13:38 ` [PATCH RFC mptcp-next 09/10] mptcp: force data_ready Benjamin Hesmans
2022-09-08 13:38 ` [PATCH RFC mptcp-next 10/10] mptcp: test TFO Benjamin Hesmans
2022-09-08 14:10 ` mptcp: test TFO: Build Failure MPTCP CI
2022-09-08 15:40 ` mptcp: test TFO: Tests Results MPTCP CI
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