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net: add sock_set_reuseport

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Add a helper to directly set the SO_REUSEPORT 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>
This commit is contained in:
Christoph Hellwig 2020-05-28 07:12:17 +02:00 committed by David S. Miller
parent 26cfabf9cd
commit fe31a326a4
3 changed files with 10 additions and 16 deletions
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1
include/net/sock.h
View File

@ -2695,6 +2695,7 @@ void sock_set_keepalive(struct sock *sk);
void sock_set_priority(struct sock *sk, u32 priority);
void sock_set_rcvbuf(struct sock *sk, int val);
void sock_set_reuseaddr(struct sock *sk);
void sock_set_reuseport(struct sock *sk);
void sock_set_sndtimeo(struct sock *sk, s64 secs);
#endif /* _SOCK_H */

8
net/core/sock.c
View File

@ -729,6 +729,14 @@ void sock_set_reuseaddr(struct sock *sk)
}
EXPORT_SYMBOL(sock_set_reuseaddr);
void sock_set_reuseport(struct sock *sk)
{
lock_sock(sk);
sk->sk_reuseport = true;
release_sock(sk);
}
EXPORT_SYMBOL(sock_set_reuseport);
void sock_no_linger(struct sock *sk)
{
lock_sock(sk);

17
net/sunrpc/xprtsock.c
View File

@ -1594,21 +1594,6 @@ static int xs_get_random_port(void)
return rand + min;
}
/**
* xs_set_reuseaddr_port - set the socket's port and address reuse options
* @sock: socket
*
* Note that this function has to be called on all sockets that share the
* same port, and it must be called before binding.
*/
static void xs_sock_set_reuseport(struct socket *sock)
{
int opt = 1;
kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEPORT,
(char *)&opt, sizeof(opt));
}
static unsigned short xs_sock_getport(struct socket *sock)
{
struct sockaddr_storage buf;
@ -1801,7 +1786,7 @@ static struct socket *xs_create_sock(struct rpc_xprt *xprt,
xs_reclassify_socket(family, sock);
if (reuseport)
xs_sock_set_reuseport(sock);
sock_set_reuseport(sock->sk);
err = xs_bind(transport, sock);
if (err) {