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ipv4: use indirect call wrappers for {tcp, udp}_{recv, send}msg() 

This avoids an indirect call per syscall for common ipv4 transports

v1 -> v2:
 - avoid unneeded reclaration for udp_sendmsg, as suggested by Willem

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 16:06:56 +02:00 committed by David S. Miller
parent 164c51fe82
commit 6f24080e8a
1 changed files with 7 additions and 3 deletions
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8
net/ipv4/af_inet.c
View File

@ -804,7 +804,8 @@ int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
if (unlikely(inet_send_prepare(sk))) if (unlikely(inet_send_prepare(sk)))
return -EAGAIN; return -EAGAIN;
return sk->sk_prot->sendmsg(sk, msg, size); return INDIRECT_CALL_2(sk->sk_prot->sendmsg, tcp_sendmsg, udp_sendmsg,
sk, msg, size);
} }
EXPORT_SYMBOL(inet_sendmsg); EXPORT_SYMBOL(inet_sendmsg);
@ -822,6 +823,8 @@ ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset,
} }
EXPORT_SYMBOL(inet_sendpage); EXPORT_SYMBOL(inet_sendpage);
INDIRECT_CALLABLE_DECLARE(int udp_recvmsg(struct sock *, struct msghdr *,
size_t, int, int, int *));
int inet_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, int inet_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
int flags) int flags)
{ {
@ -832,7 +835,8 @@ int inet_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
if (likely(!(flags & MSG_ERRQUEUE))) if (likely(!(flags & MSG_ERRQUEUE)))
sock_rps_record_flow(sk); 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, udp_recvmsg,
sk, msg, size, flags & MSG_DONTWAIT,
flags & ~MSG_DONTWAIT, &addr_len); flags & ~MSG_DONTWAIT, &addr_len);
if (err >= 0) if (err >= 0)
msg->msg_namelen = addr_len; msg->msg_namelen = addr_len;