netdev - [PATCH net-next 2/4] tcp: export tcp_sendmsg

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Date:   Mon, 26 Sep 2022 16:27:37 -0700
From:   Mat Martineau <mathew.j.martineau@...ux.intel.com>
To:     netdev@...r.kernel.org
Cc:     Benjamin Hesmans <benjamin.hesmans@...sares.net>,
        davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com, dmytro@...tyi.net,
        matthieu.baerts@...sares.net, mptcp@...ts.linux.dev,
        Mat Martineau <mathew.j.martineau@...ux.intel.com>
Subject: [PATCH net-next 2/4] tcp: export tcp_sendmsg_fastopen

From: Benjamin Hesmans <benjamin.hesmans@...sares.net>

It will be used to support TCP FastOpen with MPTCP in the following
commit.

Acked-by: Paolo Abeni <pabeni@...hat.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@...sares.net>
Co-developed-by: Dmytro Shytyi <dmytro@...tyi.net>
Signed-off-by: Dmytro Shytyi <dmytro@...tyi.net>
Signed-off-by: Benjamin Hesmans <benjamin.hesmans@...sares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
---
 include/net/tcp.h | 2 ++
 net/ipv4/tcp.c    | 5 ++---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 27e8d378c70a..4f71cc15ff8e 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -327,6 +327,8 @@ void tcp_remove_empty_skb(struct sock *sk);
 int tcp_v4_tw_remember_stamp(struct inet_timewait_sock *tw);
 int tcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
 int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size);
+int tcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg, int *copied,
+			 size_t size, struct ubuf_info *uarg);
 int tcp_sendpage(struct sock *sk, struct page *page, int offset, size_t size,
 		 int flags);
 int tcp_sendpage_locked(struct sock *sk, struct page *page, int offset,
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 5702ca9b952d..5237a3f08c94 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1162,9 +1162,8 @@ void tcp_free_fastopen_req(struct tcp_sock *tp)
 	}
 }
 
-static int tcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg,
-				int *copied, size_t size,
-				struct ubuf_info *uarg)
+int tcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg, int *copied,
+			 size_t size, struct ubuf_info *uarg)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
 	struct inet_sock *inet = inet_sk(sk);
-- 
2.37.3