提交 7c083ecb 编写于 作者: N Nikolay Borisov 提交者: David S. Miller

ipv4: Namespaceify tcp synack retries sysctl knob

Signed-off-by: NNikolay Borisov <kernel@kyup.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 6fa25166
......@@ -99,6 +99,7 @@ struct netns_ipv4 {
int sysctl_tcp_keepalive_intvl;
int sysctl_tcp_syn_retries;
int sysctl_tcp_synack_retries;
struct ping_group_range ping_group_range;
......
......@@ -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_synack_retries;
extern int sysctl_tcp_retries1;
extern int sysctl_tcp_retries2;
extern int sysctl_tcp_orphan_retries;
......
......@@ -482,10 +482,6 @@ EXPORT_SYMBOL_GPL(inet_csk_route_child_sock);
#define AF_INET_FAMILY(fam) true
#endif
/* Only thing we need from tcp.h */
extern int sysctl_tcp_synack_retries;
/* Decide when to expire the request and when to resend SYN-ACK */
static inline void syn_ack_recalc(struct request_sock *req, const int thresh,
const int max_retries,
......@@ -557,6 +553,7 @@ static void reqsk_timer_handler(unsigned long data)
{
struct request_sock *req = (struct request_sock *)data;
struct sock *sk_listener = req->rsk_listener;
struct net *net = sock_net(sk_listener);
struct inet_connection_sock *icsk = inet_csk(sk_listener);
struct request_sock_queue *queue = &icsk->icsk_accept_queue;
int qlen, expire = 0, resend = 0;
......@@ -566,7 +563,7 @@ static void reqsk_timer_handler(unsigned long data)
if (sk_state_load(sk_listener) != TCP_LISTEN)
goto drop;
max_retries = icsk->icsk_syn_retries ? : sysctl_tcp_synack_retries;
max_retries = icsk->icsk_syn_retries ? : net->ipv4.sysctl_tcp_synack_retries;
thresh = max_retries;
/* Normally all the openreqs are young and become mature
* (i.e. converted to established socket) for first timeout.
......
......@@ -291,13 +291,6 @@ static struct ctl_table ipv4_table[] = {
.extra1 = &ip_ttl_min,
.extra2 = &ip_ttl_max,
},
{
.procname = "tcp_synack_retries",
.data = &sysctl_tcp_synack_retries,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec
},
{
.procname = "tcp_max_orphans",
.data = &sysctl_tcp_max_orphans,
......@@ -960,6 +953,13 @@ static struct ctl_table ipv4_net_table[] = {
.extra1 = &tcp_syn_retries_min,
.extra2 = &tcp_syn_retries_max
},
{
.procname = "tcp_synack_retries",
.data = &init_net.ipv4.sysctl_tcp_synack_retries,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec
},
{ }
};
......
......@@ -2389,6 +2389,7 @@ static int __net_init tcp_sk_init(struct net *net)
net->ipv4.sysctl_tcp_keepalive_intvl = TCP_KEEPALIVE_INTVL;
net->ipv4.sysctl_tcp_syn_retries = TCP_SYN_RETRIES;
net->ipv4.sysctl_tcp_synack_retries = TCP_SYNACK_RETRIES;
return 0;
fail:
......
......@@ -22,7 +22,6 @@
#include <linux/gfp.h>
#include <net/tcp.h>
int sysctl_tcp_synack_retries __read_mostly = TCP_SYNACK_RETRIES;
int sysctl_tcp_retries1 __read_mostly = TCP_RETR1;
int sysctl_tcp_retries2 __read_mostly = TCP_RETR2;
int sysctl_tcp_orphan_retries __read_mostly;
......@@ -332,7 +331,7 @@ static void tcp_fastopen_synack_timer(struct sock *sk)
{
struct inet_connection_sock *icsk = inet_csk(sk);
int max_retries = icsk->icsk_syn_retries ? :
sysctl_tcp_synack_retries + 1; /* add one more retry for fastopen */
sock_net(sk)->ipv4.sysctl_tcp_synack_retries + 1; /* add one more retry for fastopen */
struct request_sock *req;
req = tcp_sk(sk)->fastopen_rsk;
......
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