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ipv4: tcp: fix ACK/RST sent with a transmit delay

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If we want to set a EDT time for the skb we want to send
via ip_send_unicast_reply(), we have to pass a new parameter
and initialize ipc.sockc.transmit_time with it.

This fixes the EDT time for ACK/RST packets sent on behalf of
a TIME_WAIT socket.

Fixes: a842fe1425 ("tcp: add optional per socket transmit delay")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2019-06-13 21:22:35 -07:00 • committed by David S. Miller
parent 3e18943333
commit d6fb396cfa
5 changed files with 19 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

14
net/ipv4/tcp_ipv4.c
View file

@ -662,8 +662,9 @@ static void tcp_v4_send_reset(const struct sock *sk, struct sk_buff *skb)
int genhash;
struct sock *sk1 = NULL;
#endif
struct net *net;
u64 transmit_time = 0;
struct sock *ctl_sk;
struct net *net;
/* Never send a reset in response to a reset. */
if (th->rst)
@ -770,12 +771,13 @@ static void tcp_v4_send_reset(const struct sock *sk, struct sk_buff *skb)
if (sk) {
ctl_sk->sk_mark = (sk->sk_state == TCP_TIME_WAIT) ?
inet_twsk(sk)->tw_mark : sk->sk_mark;
tcp_set_tx_time(skb, sk);
transmit_time = tcp_transmit_time(sk);
}
ip_send_unicast_reply(ctl_sk,
skb, &TCP_SKB_CB(skb)->header.h4.opt,
ip_hdr(skb)->saddr, ip_hdr(skb)->daddr,
&arg, arg.iov[0].iov_len);
&arg, arg.iov[0].iov_len,
transmit_time);
ctl_sk->sk_mark = 0;
__TCP_INC_STATS(net, TCP_MIB_OUTSEGS);
@ -810,6 +812,7 @@ static void tcp_v4_send_ack(const struct sock *sk,
struct net *net = sock_net(sk);
struct ip_reply_arg arg;
struct sock *ctl_sk;
u64 transmit_time;
memset(&rep.th, 0, sizeof(struct tcphdr));
memset(&arg, 0, sizeof(arg));
@ -863,11 +866,12 @@ static void tcp_v4_send_ack(const struct sock *sk,
ctl_sk = this_cpu_read(*net->ipv4.tcp_sk);
ctl_sk->sk_mark = (sk->sk_state == TCP_TIME_WAIT) ?
inet_twsk(sk)->tw_mark : sk->sk_mark;
tcp_set_tx_time(skb, sk);
transmit_time = tcp_transmit_time(sk);
ip_send_unicast_reply(ctl_sk,
skb, &TCP_SKB_CB(skb)->header.h4.opt,
ip_hdr(skb)->saddr, ip_hdr(skb)->daddr,
&arg, arg.iov[0].iov_len);
&arg, arg.iov[0].iov_len,
transmit_time);
ctl_sk->sk_mark = 0;
__TCP_INC_STATS(net, TCP_MIB_OUTSEGS);