netdev - [PATCH net-next 09/12] mptcp: Only use subflow EOF signaling on fallback connections

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Date:   Tue, 28 Jul 2020 15:12:07 -0700
From:   Mat Martineau <mathew.j.martineau@...ux.intel.com>
To:     netdev@...r.kernel.org
Cc:     Mat Martineau <mathew.j.martineau@...ux.intel.com>,
        mptcp@...ts.01.org, matthieu.baerts@...sares.net, pabeni@...hat.com
Subject: [PATCH net-next 09/12] mptcp: Only use subflow EOF signaling on fallback connections

The MPTCP state machine handles disconnections on non-fallback connections,
but the mptcp_sock still needs to get notified when fallback subflows
disconnect.

Signed-off-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
---
 net/mptcp/subflow.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 7ab2a52ad150..1c8482bc2ce5 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -1159,7 +1159,8 @@ static void subflow_state_change(struct sock *sk)
 	if (mptcp_subflow_data_available(sk))
 		mptcp_data_ready(parent, sk);
 
-	if (!(parent->sk_shutdown & RCV_SHUTDOWN) &&
+	if (__mptcp_check_fallback(mptcp_sk(parent)) &&
+	    !(parent->sk_shutdown & RCV_SHUTDOWN) &&
 	    !subflow->rx_eof && subflow_is_done(sk)) {
 		subflow->rx_eof = 1;
 		mptcp_subflow_eof(parent);
-- 
2.28.0