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From: Christoph Hellwig <hch@lst.de>
To: "David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>,
	Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
	Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
	Jon Maloy <jmaloy@redhat.com>, Ying Xue <ying.xue@windriver.com>,
	drbd-dev@lists.linbit.com, linux-kernel@vger.kernel.org,
	linux-rdma@vger.kernel.org, linux-nvme@lists.infradead.org,
	target-devel@vger.kernel.org, linux-afs@lists.infradead.org,
	linux-cifs@vger.kernel.org, cluster-devel@redhat.com,
	ocfs2-devel@oss.oracle.com, netdev@vger.kernel.org,
	ceph-devel@vger.kernel.org, rds-devel@oss.oracle.com,
	linux-nfs@vger.kernel.org, tipc-discussion@lists.sourceforge.net
Subject: [Ocfs2-devel] [PATCH 12/28] tcp: add tcp_sock_set_quickack
Date: Thu, 28 May 2020 07:12:20 +0200	[thread overview]
Message-ID: <20200528051236.620353-13-hch@lst.de> (raw)
In-Reply-To: <20200528051236.620353-1-hch@lst.de>

Add a helper to directly set the TCP_QUICKACK sockopt from kernel space
without going through a fake uaccess.  Cleanup the callers to avoid
pointless wrappers now that this is a simple function call.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/block/drbd/drbd_int.h      |  7 ------
 drivers/block/drbd/drbd_receiver.c |  5 ++--
 include/linux/tcp.h                |  1 +
 net/ipv4/tcp.c                     | 39 ++++++++++++++++++++----------
 4 files changed, 29 insertions(+), 23 deletions(-)

diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index e24bba87c8e02..14345a87c7cc5 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -1570,13 +1570,6 @@ extern void drbd_set_recv_tcq(struct drbd_device *device, int tcq_enabled);
 extern void _drbd_clear_done_ee(struct drbd_device *device, struct list_head *to_be_freed);
 extern int drbd_connected(struct drbd_peer_device *);
 
-static inline void drbd_tcp_quickack(struct socket *sock)
-{
-	int val = 2;
-	(void) kernel_setsockopt(sock, SOL_TCP, TCP_QUICKACK,
-			(char*)&val, sizeof(val));
-}
-
 /* sets the number of 512 byte sectors of our virtual device */
 void drbd_set_my_capacity(struct drbd_device *device, sector_t size);
 
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 20a5e94494acd..3a3f2b6a821f3 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1223,7 +1223,7 @@ static int drbd_recv_header_maybe_unplug(struct drbd_connection *connection, str
 		 * quickly as possible, and let remote TCP know what we have
 		 * received so far. */
 		if (err == -EAGAIN) {
-			drbd_tcp_quickack(connection->data.socket);
+			tcp_sock_set_quickack(connection->data.socket->sk, 2);
 			drbd_unplug_all_devices(connection);
 		}
 		if (err > 0) {
@@ -4959,8 +4959,7 @@ static int receive_UnplugRemote(struct drbd_connection *connection, struct packe
 {
 	/* Make sure we've acked all the TCP data associated
 	 * with the data requests being unplugged */
-	drbd_tcp_quickack(connection->data.socket);
-
+	tcp_sock_set_quickack(connection->data.socket->sk, 2);
 	return 0;
 }
 
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 9e42c7fe50a8b..2eaf8320b9db0 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -499,5 +499,6 @@ int tcp_skb_shift(struct sk_buff *to, struct sk_buff *from, int pcount,
 
 void tcp_sock_set_cork(struct sock *sk, bool on);
 void tcp_sock_set_nodelay(struct sock *sk);
+void tcp_sock_set_quickack(struct sock *sk, int val);
 
 #endif	/* _LINUX_TCP_H */
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index a65f293a19fac..27b5e7a4e2ef9 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2856,6 +2856,31 @@ void tcp_sock_set_nodelay(struct sock *sk)
 }
 EXPORT_SYMBOL(tcp_sock_set_nodelay);
 
+static void __tcp_sock_set_quickack(struct sock *sk, int val)
+{
+	if (!val) {
+		inet_csk_enter_pingpong_mode(sk);
+		return;
+	}
+
+	inet_csk_exit_pingpong_mode(sk);
+	if ((1 << sk->sk_state) & (TCPF_ESTABLISHED | TCPF_CLOSE_WAIT) &&
+	    inet_csk_ack_scheduled(sk)) {
+		inet_csk(sk)->icsk_ack.pending |= ICSK_ACK_PUSHED;
+		tcp_cleanup_rbuf(sk, 1);
+		if (!(val & 1))
+			inet_csk_enter_pingpong_mode(sk);
+	}
+}
+
+void tcp_sock_set_quickack(struct sock *sk, int val)
+{
+	lock_sock(sk);
+	__tcp_sock_set_quickack(sk, val);
+	release_sock(sk);
+}
+EXPORT_SYMBOL(tcp_sock_set_quickack);
+
 /*
  *	Socket option code for TCP.
  */
@@ -3096,19 +3121,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
 		break;
 
 	case TCP_QUICKACK:
-		if (!val) {
-			inet_csk_enter_pingpong_mode(sk);
-		} else {
-			inet_csk_exit_pingpong_mode(sk);
-			if ((1 << sk->sk_state) &
-			    (TCPF_ESTABLISHED | TCPF_CLOSE_WAIT) &&
-			    inet_csk_ack_scheduled(sk)) {
-				icsk->icsk_ack.pending |= ICSK_ACK_PUSHED;
-				tcp_cleanup_rbuf(sk, 1);
-				if (!(val & 1))
-					inet_csk_enter_pingpong_mode(sk);
-			}
-		}
+		__tcp_sock_set_quickack(sk, val);
 		break;
 
 #ifdef CONFIG_TCP_MD5SIG
-- 
2.26.2

  parent reply	other threads:[~2020-05-28  5:12 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-28  5:12 [Ocfs2-devel] remove most callers of kernel_setsockopt v3 Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 01/28] net: add sock_set_reuseaddr Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 02/28] net: add sock_no_linger Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 03/28] net: add sock_set_priority Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 04/28] net: add sock_set_sndtimeo Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 05/28] net: add sock_bindtoindex Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 06/28] net: add sock_enable_timestamps Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 07/28] net: add sock_set_keepalive Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 08/28] net: add sock_set_rcvbuf Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 09/28] net: add sock_set_reuseport Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 10/28] tcp: add tcp_sock_set_cork Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 11/28] tcp: add tcp_sock_set_nodelay Christoph Hellwig
2020-05-28  5:12 ` Christoph Hellwig [this message]
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 13/28] tcp: add tcp_sock_set_syncnt Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 14/28] tcp: add tcp_sock_set_user_timeout Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 15/28] tcp: add tcp_sock_set_keepidle Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 16/28] tcp: add tcp_sock_set_keepintvl Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 17/28] tcp: add tcp_sock_set_keepcnt Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 18/28] ipv4: add ip_sock_set_tos Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 19/28] ipv4: add ip_sock_set_freebind Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 20/28] ipv4: add ip_sock_set_recverr Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 21/28] ipv4: add ip_sock_set_mtu_discover Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 22/28] ipv4: add ip_sock_set_pktinfo Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 23/28] ipv6: add ip6_sock_set_v6only Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 24/28] ipv6: add ip6_sock_set_recverr Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 25/28] ipv6: add ip6_sock_set_addr_preferences Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 26/28] ipv6: add ip6_sock_set_recvpktinfo Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 27/28] rxrpc: add rxrpc_sock_set_min_security_level Christoph Hellwig
2020-05-28  5:12 ` [Ocfs2-devel] [PATCH 28/28] tipc: call tsk_set_importance from tipc_topsrv_create_listener Christoph Hellwig
2020-05-28 18:12 ` [Ocfs2-devel] remove most callers of kernel_setsockopt v3 David Miller

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