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tcp: Namespace-ify sysctl_tcp_thin_linear_timeouts 

Note that sysctl_tcp_thin_dupack was not used, I deleted it.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2017-10-26 21:54:58 -07:00 committed by David S. Miller
parent e20223f196
commit 2c04ac8ae0
4 changed files with 9 additions and 12 deletions
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1
include/net/netns/ipv4.h
View File

@ -130,6 +130,7 @@ struct netns_ipv4 {
int sysctl_tcp_timestamps;
int sysctl_tcp_early_retrans;
int sysctl_tcp_recovery;
int sysctl_tcp_thin_linear_timeouts;
struct inet_timewait_death_row tcp_death_row;
int sysctl_max_syn_backlog;
int sysctl_tcp_fastopen;

2
include/net/tcp.h
View File

@ -263,8 +263,6 @@ extern int sysctl_tcp_moderate_rcvbuf;
extern int sysctl_tcp_tso_win_divisor;
extern int sysctl_tcp_workaround_signed_windows;
extern int sysctl_tcp_slow_start_after_idle;
extern int sysctl_tcp_thin_linear_timeouts;
extern int sysctl_tcp_thin_dupack;
#define TCP_RACK_LOSS_DETECTION 0x1 /* Use RACK to detect losses */

14
net/ipv4/sysctl_net_ipv4.c
View File

@ -620,13 +620,6 @@ static struct ctl_table ipv4_table[] = {
.mode = 0644,
.proc_handler = proc_allowed_congestion_control,
},
{
.procname = "tcp_thin_linear_timeouts",
.data = &sysctl_tcp_thin_linear_timeouts,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec
},
{
.procname = "tcp_min_tso_segs",
.data = &sysctl_tcp_min_tso_segs,
@ -1145,6 +1138,13 @@ static struct ctl_table ipv4_net_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
.procname = "tcp_thin_linear_timeouts",
.data = &init_net.ipv4.sysctl_tcp_thin_linear_timeouts,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec
},
{ }
};

4
net/ipv4/tcp_timer.c
View File

@ -22,8 +22,6 @@
#include <linux/gfp.h>
#include <net/tcp.h>
int sysctl_tcp_thin_linear_timeouts __read_mostly;
/**
* tcp_write_err() - close socket and save error info
* @sk: The socket the error has appeared on.
@ -522,7 +520,7 @@ out_reset_timer:
* linear-timeout retransmissions into a black hole
*/
if (sk->sk_state == TCP_ESTABLISHED &&
(tp->thin_lto || sysctl_tcp_thin_linear_timeouts) &&
(tp->thin_lto || net->ipv4.sysctl_tcp_thin_linear_timeouts) &&
tcp_stream_is_thin(tp) &&
icsk->icsk_retransmits <= TCP_THIN_LINEAR_RETRIES) {
icsk->icsk_backoff = 0;