[PATCH net-next 4/5] ipv6: use indirect call wrappers for {tcp,udpv6}_{recv,send}msg()

[Paolo Abeni]

This avoids an indirect call per syscall for common ipv6 transports

Signed-off-by: Paolo Abeni <pab...@redhat.com>
---
 net/ipv6/af_inet6.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 4628681eca88..d5e98ee9fc79 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -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)
 {
@@ -584,8 +589,9 @@ 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,
-                                  flags & ~MSG_DONTWAIT, &addr_len);
+       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;
        return err;
-- 
2.20.1