From 1295e2cf3065a55f35d112e4dfeb2c7322823249 Mon Sep 17 00:00:00 2001 From: Yafang Shao <laoar.shao@gmail.com> Date: Wed, 7 Nov 2018 19:20:16 +0800 Subject: [PATCH] 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> --- net/dccp/proto.c | 2 +- net/ipv4/af_inet.c | 2 +- net/ipv4/inet_connection_sock.c | 1 - 3 files changed, 2 insertions(+), 3 deletions(-) diff --git a/net/dccp/proto.c b/net/dccp/proto.c index 43733accf58eb..658cd32bb7b37 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -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: diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 07749c5b0a50b..326c422c22f8d 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -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: diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c index 5c63449130d95..6ea523d719477 100644 --- a/net/ipv4/inet_connection_sock.c +++ b/net/ipv4/inet_connection_sock.c @@ -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); -- 2.30.2