From: Christoph Hellwig <hch@lst.de>
To: "David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
Jakub Kicinski <kuba-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Eric Dumazet <edumazet-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Alexey Kuznetsov <kuznet-v/Mj1YrvjDBInbfyfbPRSQ@public.gmane.org>,
Hideaki YOSHIFUJI
<yoshfuji-VfPWfsRibaP+Ru+s062T9g@public.gmane.org>,
Jon Maloy <jmaloy-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Ying Xue <ying.xue-CWA4WttNNZF54TAoqtyWWQ@public.gmane.org>,
drbd-dev-cunTk1MwBs8qoQakbn7OcQ@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
target-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-afs-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
cluster-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
ocfs2-devel-N0ozoZBvEnrZJqsBc5GL+g@public.gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
ceph-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
rds-devel-N0ozoZBvEnrZJqsBc5GL+g@public.gmane.org,
linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
tipc-discussion-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: [Ocfs2-devel] [PATCH 17/28] tcp: add tcp_sock_set_keepcnt
Date: Thu, 28 May 2020 07:12:25 +0200 [thread overview]
Message-ID: <20200528051236.620353-18-hch@lst.de> (raw)
In-Reply-To: <20200528051236.620353-1-hch@lst.de>
Add a helper to directly set the TCP_KEEPCNT sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/linux/tcp.h | 1 +
net/ipv4/tcp.c | 12 ++++++++++++
net/rds/tcp.h | 2 +-
net/rds/tcp_listen.c | 17 +++--------------
net/sunrpc/xprtsock.c | 3 +--
5 files changed, 18 insertions(+), 17 deletions(-)
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 1f9bada00faab..9aac824c523cf 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -498,6 +498,7 @@ int tcp_skb_shift(struct sk_buff *to, struct sk_buff *from, int pcount,
int shiftlen);
void tcp_sock_set_cork(struct sock *sk, bool on);
+int tcp_sock_set_keepcnt(struct sock *sk, int val);
int tcp_sock_set_keepidle(struct sock *sk, int val);
int tcp_sock_set_keepintvl(struct sock *sk, int val);
void tcp_sock_set_nodelay(struct sock *sk);
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 7eb083e09786a..15d47d5e79510 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2946,6 +2946,18 @@ int tcp_sock_set_keepintvl(struct sock *sk, int val)
}
EXPORT_SYMBOL(tcp_sock_set_keepintvl);
+int tcp_sock_set_keepcnt(struct sock *sk, int val)
+{
+ if (val < 1 || val > MAX_TCP_KEEPCNT)
+ return -EINVAL;
+
+ lock_sock(sk);
+ tcp_sk(sk)->keepalive_probes = val;
+ release_sock(sk);
+ return 0;
+}
+EXPORT_SYMBOL(tcp_sock_set_keepcnt);
+
/*
* Socket option code for TCP.
*/
diff --git a/net/rds/tcp.h b/net/rds/tcp.h
index f6d75d8cb167a..bad9cf49d5657 100644
--- a/net/rds/tcp.h
+++ b/net/rds/tcp.h
@@ -70,7 +70,7 @@ struct socket *rds_tcp_listen_init(struct net *net, bool isv6);
void rds_tcp_listen_stop(struct socket *sock, struct work_struct *acceptor);
void rds_tcp_listen_data_ready(struct sock *sk);
int rds_tcp_accept_one(struct socket *sock);
-int rds_tcp_keepalive(struct socket *sock);
+void rds_tcp_keepalive(struct socket *sock);
void *rds_tcp_listen_sock_def_readable(struct net *net);
/* tcp_recv.c */
diff --git a/net/rds/tcp_listen.c b/net/rds/tcp_listen.c
index 9ad555c48d15d..101cf14215a0b 100644
--- a/net/rds/tcp_listen.c
+++ b/net/rds/tcp_listen.c
@@ -38,27 +38,19 @@
#include "rds.h"
#include "tcp.h"
-int rds_tcp_keepalive(struct socket *sock)
+void rds_tcp_keepalive(struct socket *sock)
{
/* values below based on xs_udp_default_timeout */
int keepidle = 5; /* send a probe 'keepidle' secs after last data */
int keepcnt = 5; /* number of unack'ed probes before declaring dead */
- int ret = 0;
sock_set_keepalive(sock->sk);
-
- ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_KEEPCNT,
- (char *)&keepcnt, sizeof(keepcnt));
- if (ret < 0)
- goto bail;
-
+ tcp_sock_set_keepcnt(sock->sk, keepcnt);
tcp_sock_set_keepidle(sock->sk, keepidle);
/* KEEPINTVL is the interval between successive probes. We follow
* the model in xs_tcp_finish_connecting() and re-use keepidle.
*/
tcp_sock_set_keepintvl(sock->sk, keepidle);
-bail:
- return ret;
}
/* rds_tcp_accept_one_path(): if accepting on cp_index > 0, make sure the
@@ -140,10 +132,7 @@ int rds_tcp_accept_one(struct socket *sock)
new_sock->ops = sock->ops;
__module_get(new_sock->ops->owner);
- ret = rds_tcp_keepalive(new_sock);
- if (ret < 0)
- goto out;
-
+ rds_tcp_keepalive(new_sock);
rds_tcp_tune(new_sock);
inet = inet_sk(new_sock->sk);
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 5ca64e12af0c5..0d3ec055bc12f 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -2109,8 +2109,7 @@ static void xs_tcp_set_socket_timeouts(struct rpc_xprt *xprt,
sock_set_keepalive(sock->sk);
tcp_sock_set_keepidle(sock->sk, keepidle);
tcp_sock_set_keepintvl(sock->sk, keepidle);
- kernel_setsockopt(sock, SOL_TCP, TCP_KEEPCNT,
- (char *)&keepcnt, sizeof(keepcnt));
+ tcp_sock_set_keepcnt(sock->sk, keepcnt);
/* TCP user timeout (see RFC5482) */
tcp_sock_set_user_timeout(sock->sk, timeo);
--
2.26.2
next prev 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 ` [Ocfs2-devel] [PATCH 12/28] tcp: add tcp_sock_set_quickack Christoph Hellwig
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 ` Christoph Hellwig [this message]
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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