netdev - [PATCH net-next 3/4] mptcp: implement mptcp_pm_connection

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Message-Id: <20241021-net-next-mptcp-misc-6-13-v1-3-1ef02746504a@kernel.org>
Date: Mon, 21 Oct 2024 17:14:05 +0200
From: "Matthieu Baerts (NGI0)" <matttbe@...nel.org>
To: mptcp@...ts.linux.dev, Mat Martineau <martineau@...nel.org>, 
 Geliang Tang <geliang@...nel.org>, "David S. Miller" <davem@...emloft.net>, 
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
 Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
 "Matthieu Baerts (NGI0)" <matttbe@...nel.org>, 
 Geliang Tang <geliang@...nel.org>
Subject: [PATCH net-next 3/4] mptcp: implement mptcp_pm_connection_closed

From: Geliang Tang <tanggeliang@...inos.cn>

The MPTCP path manager event handler mptcp_pm_connection_closed
interface has been added in the commit 1b1c7a0ef7f3 ("mptcp: Add path
manager interface") but it was an empty function from then on.

With such name, it sounds good to invoke mptcp_event with the
MPTCP_EVENT_CLOSED event type from it. It also removes a bit of
duplicated code.

Signed-off-by: Geliang Tang <tanggeliang@...inos.cn>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
---
 net/mptcp/pm.c       | 3 +++
 net/mptcp/protocol.c | 6 ++----
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c
index 620264c75dc2e3b79927c5db44ec6ce84d83590b..16c336c519403d0147c5a3ffe301d0238c5b250a 100644
--- a/net/mptcp/pm.c
+++ b/net/mptcp/pm.c
@@ -154,6 +154,9 @@ void mptcp_pm_fully_established(struct mptcp_sock *msk, const struct sock *ssk)
 void mptcp_pm_connection_closed(struct mptcp_sock *msk)
 {
 	pr_debug("msk=%p\n", msk);
+
+	if (msk->token)
+		mptcp_event(MPTCP_EVENT_CLOSED, msk, NULL, GFP_KERNEL);
 }

 void mptcp_pm_subflow_established(struct mptcp_sock *msk)
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index a6c9661a4c45a00e982d0f68f21621c3cf33469b..e978e05ec8d1357c4d40cd9830f7dd82a68cf4bf 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -3139,8 +3139,7 @@ bool __mptcp_close(struct sock *sk, long timeout)

 	sock_hold(sk);
 	pr_debug("msk=%p state=%d\n", sk, sk->sk_state);
-	if (msk->token)
-		mptcp_event(MPTCP_EVENT_CLOSED, msk, NULL, GFP_KERNEL);
+	mptcp_pm_connection_closed(msk);

 	if (sk->sk_state == TCP_CLOSE) {
 		__mptcp_destroy_sock(sk);
@@ -3206,8 +3205,7 @@ static int mptcp_disconnect(struct sock *sk, int flags)
 	mptcp_stop_rtx_timer(sk);
 	mptcp_stop_tout_timer(sk);

-	if (msk->token)
-		mptcp_event(MPTCP_EVENT_CLOSED, msk, NULL, GFP_KERNEL);
+	mptcp_pm_connection_closed(msk);

 	/* msk->subflow is still intact, the following will not free the first
 	 * subflow

-- 
2.45.2