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Commit 164c51fe authored by Paolo Abeni's avatar Paolo Abeni Committed by David S. Miller
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ipv6: use indirect call wrappers for {tcp, udpv6}_{recv, send}msg() 



This avoids an indirect call per syscall for common ipv6 transports

Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a648a592

net/ipv6/af_inet6.c

+9 −3
Original line number Diff line number Diff line
@@ -564,6 +564,8 @@ int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 
}

EXPORT_SYMBOL(inet6_ioctl);



INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,

					    size_t));

int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)

{

	struct sock *sk = sock->sk;
@@ -571,9 +573,12 @@ int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) 
	if (unlikely(inet_send_prepare(sk)))

		return -EAGAIN;



	return sk->sk_prot->sendmsg(sk, msg, size);

	return INDIRECT_CALL_2(sk->sk_prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,

			       sk, msg, size);

}



INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,

					    size_t, int, int, int *));

int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,

		  int flags)

{
@@ -584,7 +589,8 @@ int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, 
	if (likely(!(flags & MSG_ERRQUEUE)))

		sock_rps_record_flow(sk);



	err = sk->sk_prot->recvmsg(sk, msg, size, flags & MSG_DONTWAIT,

	err = INDIRECT_CALL_2(sk->sk_prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,

			      sk, msg, size, flags & MSG_DONTWAIT,

			      flags & ~MSG_DONTWAIT, &addr_len);

	if (err >= 0)

		msg->msg_namelen = addr_len;