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authorChristoph Hellwig <hch@lst.de>2020-05-28 07:12:25 +0200
committerDavid S. Miller <davem@davemloft.net>2020-05-28 11:11:45 -0700
commit480aeb9639d6a077c611b303a22f9b1e5937d081 (patch)
tree923c33a2592c8822ab15abc0929df23adda27a9f /net/rds
parentd41ecaac903c9f4658a71d4e7a708673cfb5abba (diff)
downloadlinux-480aeb9639d6a077c611b303a22f9b1e5937d081.tar.bz2
tcp: add tcp_sock_set_keepcnt
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> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds')
-rw-r--r--net/rds/tcp.h2
-rw-r--r--net/rds/tcp_listen.c17
2 files changed, 4 insertions, 15 deletions
diff --git a/net/rds/tcp.h b/net/rds/tcp.h
index f6d75d8cb167..bad9cf49d565 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 9ad555c48d15..101cf14215a0 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);