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inet: minor optimization for backlog setting in listen(2) 

Set the backlog earlier in inet_dccp_listen() and inet_listen(),
then we can avoid the redundant setting.

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yafang Shao 2018-11-07 19:20:16 +08:00 committed by David S. Miller
parent 7dad9937e0
commit 1295e2cf30
3 changed files with 2 additions and 3 deletions
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2
net/dccp/proto.c
View File

@ -948,6 +948,7 @@ int inet_dccp_listen(struct socket *sock, int backlog)
if (!((1 << old_state) & (DCCPF_CLOSED | DCCPF_LISTEN)))
goto out;
sk->sk_max_ack_backlog = backlog;
/* Really, if the socket is already in listen state
* we can only allow the backlog to be adjusted.
*/
@ -960,7 +961,6 @@ int inet_dccp_listen(struct socket *sock, int backlog)
if (err)
goto out;
}
sk->sk_max_ack_backlog = backlog;
err = 0;
out:

2
net/ipv4/af_inet.c
View File

@ -208,6 +208,7 @@ int inet_listen(struct socket *sock, int backlog)
if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN)))
goto out;
sk->sk_max_ack_backlog = backlog;
/* Really, if the socket is already in listen state
* we can only allow the backlog to be adjusted.
*/
@ -231,7 +232,6 @@ int inet_listen(struct socket *sock, int backlog)
goto out;
tcp_call_bpf(sk, BPF_SOCK_OPS_TCP_LISTEN_CB, 0, NULL);
}
sk->sk_max_ack_backlog = backlog;
err = 0;
out:

1
net/ipv4/inet_connection_sock.c
View File

@ -881,7 +881,6 @@ int inet_csk_listen_start(struct sock *sk, int backlog)
reqsk_queue_alloc(&icsk->icsk_accept_queue);
sk->sk_max_ack_backlog = backlog;
sk->sk_ack_backlog = 0;
inet_csk_delack_init(sk);