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ipv4: Namespaceify tcp_retries2 sysctl knob

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Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Borisov 2016-02-03 09:46:54 +02:00 committed by David S. Miller
parent ae5c3f406c
commit c6214a97c8
6 changed files with 13 additions and 12 deletions
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1
include/net/netns/ipv4.h
View File

@ -103,6 +103,7 @@ struct netns_ipv4 {
int sysctl_tcp_syncookies;
int sysctl_tcp_reordering;
int sysctl_tcp_retries1;
int sysctl_tcp_retries2;
struct ping_group_range ping_group_range;

1
include/net/tcp.h
View File

@ -240,7 +240,6 @@ extern int sysctl_tcp_timestamps;
extern int sysctl_tcp_window_scaling;
extern int sysctl_tcp_sack;
extern int sysctl_tcp_fin_timeout;
extern int sysctl_tcp_retries2;
extern int sysctl_tcp_orphan_retries;
extern int sysctl_tcp_fastopen;
extern int sysctl_tcp_retrans_collapse;

14
net/ipv4/sysctl_net_ipv4.c
View File

@ -319,13 +319,6 @@ static struct ctl_table ipv4_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec
},
{
.procname = "tcp_retries2",
.data = &sysctl_tcp_retries2,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec
},
{
.procname = "tcp_fin_timeout",
.data = &sysctl_tcp_fin_timeout,
@ -960,6 +953,13 @@ static struct ctl_table ipv4_net_table[] = {
.proc_handler = proc_dointvec_minmax,
.extra2 = &tcp_retr1_max
},
{
.procname = "tcp_retries2",
.data = &init_net.ipv4.sysctl_tcp_retries2,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec
},
{ }
};

1
net/ipv4/tcp_ipv4.c
View File

@ -2392,6 +2392,7 @@ static int __net_init tcp_sk_init(struct net *net)
net->ipv4.sysctl_tcp_syncookies = 0;
net->ipv4.sysctl_tcp_reordering = TCP_FASTRETRANS_THRESH;
net->ipv4.sysctl_tcp_retries1 = TCP_RETR1;
net->ipv4.sysctl_tcp_retries2 = TCP_RETR2;
return 0;
fail:

3
net/ipv4/tcp_output.c
View File

@ -3476,6 +3476,7 @@ void tcp_send_probe0(struct sock *sk)
{
struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
struct net *net = sock_net(sk);
unsigned long probe_max;
int err;
@ -3489,7 +3490,7 @@ void tcp_send_probe0(struct sock *sk)
}
if (err <= 0) {
if (icsk->icsk_backoff < sysctl_tcp_retries2)
if (icsk->icsk_backoff < net->ipv4.sysctl_tcp_retries2)
icsk->icsk_backoff++;
icsk->icsk_probes_out++;
probe_max = TCP_RTO_MAX;

5
net/ipv4/tcp_timer.c
View File

@ -22,7 +22,6 @@
#include <linux/gfp.h>
#include <net/tcp.h>
int sysctl_tcp_retries2 __read_mostly = TCP_RETR2;
int sysctl_tcp_orphan_retries __read_mostly;
int sysctl_tcp_thin_linear_timeouts __read_mostly;
@ -189,7 +188,7 @@ static int tcp_write_timeout(struct sock *sk)
dst_negative_advice(sk);
}
retry_until = sysctl_tcp_retries2;
retry_until = net->ipv4.sysctl_tcp_retries2;
if (sock_flag(sk, SOCK_DEAD)) {
const bool alive = icsk->icsk_rto < TCP_RTO_MAX;
@ -303,7 +302,7 @@ static void tcp_probe_timer(struct sock *sk)
(s32)(tcp_time_stamp - start_ts) > icsk->icsk_user_timeout)
goto abort;
max_probes = sysctl_tcp_retries2;
max_probes = sock_net(sk)->ipv4.sysctl_tcp_retries2;
if (sock_flag(sk, SOCK_DEAD)) {
const bool alive = inet_csk_rto_backoff(icsk, TCP_RTO_MAX) < TCP_RTO_MAX;