netdev - [PATCH net-next 09/10] mptcp: expose mptcp_check_and_set

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Date:   Fri,  3 Dec 2021 14:35:40 -0800
From:   Mat Martineau <mathew.j.martineau@...ux.intel.com>
To:     netdev@...r.kernel.org
Cc:     Maxim Galaganov <max@...ernet.ru>, davem@...emloft.net,
        kuba@...nel.org, matthieu.baerts@...sares.net,
        mptcp@...ts.linux.dev, Paolo Abeni <pabeni@...hat.com>,
        Mat Martineau <mathew.j.martineau@...ux.intel.com>
Subject: [PATCH net-next 09/10] mptcp: expose mptcp_check_and_set_pending

From: Maxim Galaganov <max@...ernet.ru>

Expose the mptcp_check_and_set_pending() function for use inside MPTCP
sockopt code. The next patch will call it when TCP_CORK is cleared or
TCP_NODELAY is set on the MPTCP socket in order to push pending data
from mptcp_release_cb().

Acked-by: Paolo Abeni <pabeni@...hat.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@...sares.net>
Signed-off-by: Maxim Galaganov <max@...ernet.ru>
Signed-off-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
---
 net/mptcp/protocol.c | 2 +-
 net/mptcp/protocol.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 943f74e804bd..f124cca125d2 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1502,7 +1502,7 @@ static void mptcp_update_post_push(struct mptcp_sock *msk,
 		msk->snd_nxt = snd_nxt_new;
 }
 
-static void mptcp_check_and_set_pending(struct sock *sk)
+void mptcp_check_and_set_pending(struct sock *sk)
 {
 	if (mptcp_send_head(sk) &&
 	    !test_bit(MPTCP_PUSH_PENDING, &mptcp_sk(sk)->flags))
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index bb51fa7f5566..147b22da41ca 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -555,6 +555,7 @@ unsigned int mptcp_stale_loss_cnt(const struct net *net);
 void mptcp_subflow_fully_established(struct mptcp_subflow_context *subflow,
 				     struct mptcp_options_received *mp_opt);
 bool __mptcp_retransmit_pending_data(struct sock *sk);
+void mptcp_check_and_set_pending(struct sock *sk);
 void __mptcp_push_pending(struct sock *sk, unsigned int flags);
 bool mptcp_subflow_data_available(struct sock *sk);
 void __init mptcp_subflow_init(void);
-- 
2.34.1