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net: introduce keepalive function in struct proto 

Direct call of tcp_set_keepalive() function from protocol-agnostic
sock_setsockopt() function in net/core/sock.c violates network
layering. And newly introduced protocol (SMC-R) will need its own
keepalive function. Therefore, add "keepalive" function pointer
to "struct proto", and call it from sock_setsockopt() via this pointer.

Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Reviewed-by: Utz Bacher <utz.bacher@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun 2017-01-09 16:55:12 +01:00 committed by David S. Miller
parent c8584b3fdf
commit 4b9d07a440
5 changed files with 6 additions and 5 deletions
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1
include/net/sock.h
View File

@ -1024,6 +1024,7 @@ struct proto {
int (*getsockopt)(struct sock *sk, int level,
int optname, char __user *optval,
int __user *option);
void (*keepalive)(struct sock *sk, int valbool);
#ifdef CONFIG_COMPAT
int (*compat_setsockopt)(struct sock *sk,
int level,

7
net/core/sock.c
View File

@ -762,11 +762,8 @@ set_rcvbuf:
goto set_rcvbuf;
case SO_KEEPALIVE:
#ifdef CONFIG_INET
if (sk->sk_protocol == IPPROTO_TCP &&
sk->sk_type == SOCK_STREAM)
tcp_set_keepalive(sk, valbool);
#endif
if (sk->sk_prot->keepalive)
sk->sk_prot->keepalive(sk, valbool);
sock_valbool_flag(sk, SOCK_KEEPOPEN, valbool);
break;

1
net/ipv4/tcp_ipv4.c
View File

@ -2376,6 +2376,7 @@ struct proto tcp_prot = {
.shutdown = tcp_shutdown,
.setsockopt = tcp_setsockopt,
.getsockopt = tcp_getsockopt,
.keepalive = tcp_set_keepalive,
.recvmsg = tcp_recvmsg,
.sendmsg = tcp_sendmsg,
.sendpage = tcp_sendpage,

1
net/ipv4/tcp_timer.c
View File

@ -617,6 +617,7 @@ void tcp_set_keepalive(struct sock *sk, int val)
else if (!val)
inet_csk_delete_keepalive_timer(sk);
}
EXPORT_SYMBOL_GPL(tcp_set_keepalive);
static void tcp_keepalive_timer (unsigned long data)

1
net/ipv6/tcp_ipv6.c
View File

@ -1889,6 +1889,7 @@ struct proto tcpv6_prot = {
.shutdown = tcp_shutdown,
.setsockopt = tcp_setsockopt,
.getsockopt = tcp_getsockopt,
.keepalive = tcp_set_keepalive,
.recvmsg = tcp_recvmsg,
.sendmsg = tcp_sendmsg,
.sendpage = tcp_sendpage,