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authorChristoph Hellwig <hch@lst.de>2020-05-28 07:12:15 +0200
committerDavid S. Miller <davem@davemloft.net>2020-05-28 11:11:44 -0700
commitce3d9544cecacd40389c399d2b7ca31acc533b70 (patch)
tree188689107da003fa8137181ab48f6ad973414acc
parent783da70e83967efeacf3c02c9dcfdc2b17bd62eb (diff)
net: add sock_set_keepalive
Add a helper to directly set the SO_KEEPALIVE 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>
-rw-r--r--fs/dlm/lowcomms.c6
-rw-r--r--include/net/sock.h1
-rw-r--r--net/core/sock.c10
-rw-r--r--net/rds/tcp_listen.c6
-rw-r--r--net/sunrpc/xprtsock.c4
5 files changed, 14 insertions, 13 deletions
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index b79711d0aac7..b6e6dba28154 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1142,11 +1142,7 @@ static struct socket *tcp_create_listen_sock(struct connection *con,
con->sock = NULL;
goto create_out;
}
- result = kernel_setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
- (char *)&one, sizeof(one));
- if (result < 0) {
- log_print("Set keepalive failed: %d", result);
- }
+ sock_set_keepalive(sock->sk);
result = sock->ops->listen(sock, 5);
if (result < 0) {
diff --git a/include/net/sock.h b/include/net/sock.h
index 99ef43508d2b..dc08c176238f 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2691,6 +2691,7 @@ void sock_def_readable(struct sock *sk);
int sock_bindtoindex(struct sock *sk, int ifindex);
void sock_enable_timestamps(struct sock *sk);
void sock_no_linger(struct sock *sk);
+void sock_set_keepalive(struct sock *sk);
void sock_set_priority(struct sock *sk, u32 priority);
void sock_set_reuseaddr(struct sock *sk);
void sock_set_sndtimeo(struct sock *sk, s64 secs);
diff --git a/net/core/sock.c b/net/core/sock.c
index e4a4dd2b3d8b..728f5fb156a0 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -779,6 +779,16 @@ void sock_enable_timestamps(struct sock *sk)
}
EXPORT_SYMBOL(sock_enable_timestamps);
+void sock_set_keepalive(struct sock *sk)
+{
+ lock_sock(sk);
+ if (sk->sk_prot->keepalive)
+ sk->sk_prot->keepalive(sk, true);
+ sock_valbool_flag(sk, SOCK_KEEPOPEN, true);
+ release_sock(sk);
+}
+EXPORT_SYMBOL(sock_set_keepalive);
+
/*
* This is meant for all protocols to use and covers goings on
* at the socket level. Everything here is generic.
diff --git a/net/rds/tcp_listen.c b/net/rds/tcp_listen.c
index bbb31b9c0b39..d8bd13276959 100644
--- a/net/rds/tcp_listen.c
+++ b/net/rds/tcp_listen.c
@@ -43,13 +43,9 @@ int 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 keepalive = 1;
int ret = 0;
- ret = kernel_setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
- (char *)&keepalive, sizeof(keepalive));
- if (ret < 0)
- goto bail;
+ sock_set_keepalive(sock->sk);
ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_KEEPCNT,
(char *)&keepcnt, sizeof(keepcnt));
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 845d0be805ec..30082cd03996 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -2110,7 +2110,6 @@ static void xs_tcp_set_socket_timeouts(struct rpc_xprt *xprt,
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
unsigned int keepidle;
unsigned int keepcnt;
- unsigned int opt_on = 1;
unsigned int timeo;
spin_lock(&xprt->transport_lock);
@@ -2122,8 +2121,7 @@ static void xs_tcp_set_socket_timeouts(struct rpc_xprt *xprt,
spin_unlock(&xprt->transport_lock);
/* TCP Keepalive options */
- kernel_setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
- (char *)&opt_on, sizeof(opt_on));
+ sock_set_keepalive(sock->sk);
kernel_setsockopt(sock, SOL_TCP, TCP_KEEPIDLE,
(char *)&keepidle, sizeof(keepidle));
kernel_setsockopt(sock, SOL_TCP, TCP_KEEPINTVL,