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linux-sg2042
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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: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2019-07-03 16:06:55 +02:00 committed by David S. Miller
parent a648a592dc
commit 164c51fe82
1 changed files with 9 additions and 3 deletions
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12
net/ipv6/af_inet6.c
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@ -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;