From: Christoph Hellwig <hch@lst.de>
Date: Thu, 28 May 2020 07:12:24 +0200
Subject: tcp: add tcp_sock_set_keepintvl
Patch-mainline: v5.8-rc1
Git-commit: d41ecaac903c9f4658a71d4e7a708673cfb5abba
References: bsc#1177028
Add a helper to directly set the TCP_KEEPINTVL sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Gary Lin <glin@suse.com>
---
include/linux/tcp.h | 1 +
net/ipv4/tcp.c | 12 ++++++++++++
net/rds/tcp_listen.c | 4 +---
net/sunrpc/xprtsock.c | 3 +--
4 files changed, 15 insertions(+), 5 deletions(-)
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -489,6 +489,7 @@ int tcp_skb_shift(struct sk_buff *to, st
void tcp_sock_set_cork(struct sock *sk, bool on);
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);
void tcp_sock_set_quickack(struct sock *sk, int val);
int tcp_sock_set_syncnt(struct sock *sk, int val);
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2920,6 +2920,18 @@ int tcp_sock_set_keepidle(struct sock *s
}
EXPORT_SYMBOL(tcp_sock_set_keepidle);
+int tcp_sock_set_keepintvl(struct sock *sk, int val)
+{
+ if (val < 1 || val > MAX_TCP_KEEPINTVL)
+ return -EINVAL;
+
+ lock_sock(sk);
+ tcp_sk(sk)->keepalive_intvl = val * HZ;
+ release_sock(sk);
+ return 0;
+}
+EXPORT_SYMBOL(tcp_sock_set_keepintvl);
+
/*
* Socket option code for TCP.
*/
--- a/net/rds/tcp_listen.c
+++ b/net/rds/tcp_listen.c
@@ -53,12 +53,10 @@ int rds_tcp_keepalive(struct socket *soc
goto bail;
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.
*/
- ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_KEEPINTVL,
- (char *)&keepidle, sizeof(keepidle));
+ tcp_sock_set_keepintvl(sock->sk, keepidle);
bail:
return ret;
}
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -2232,8 +2232,7 @@ static void xs_tcp_set_socket_timeouts(s
/* TCP Keepalive options */
sock_set_keepalive(sock->sk);
tcp_sock_set_keepidle(sock->sk, keepidle);
- kernel_setsockopt(sock, SOL_TCP, TCP_KEEPINTVL,
- (char *)&keepidle, sizeof(keepidle));
+ tcp_sock_set_keepintvl(sock->sk, keepidle);
kernel_setsockopt(sock, SOL_TCP, TCP_KEEPCNT,
(char *)&keepcnt, sizeof(keepcnt));