diff options
| author | Haishuang Yan <yanhaishuang@cmss.chinamobile.com> | 2016-12-25 14:33:16 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-12-27 12:28:07 -0500 |
| commit | 56ab6b93007e5000a8812985aec1833c4a6a9ce0 (patch) | |
| tree | b51a1451cdcd323e70e5be14f8186fcb645dbbe3 | |
| parent | e6afb1ad88feddf2347ea779cfaf4d03d3cd40b6 (diff) | |
ipv4: Namespaceify tcp_tw_reuse knob
Different namespaces might have different requirements to reuse
TIME-WAIT sockets for new connections. This might be required in
cases where different namespace applications are in place which
require TIME_WAIT socket connections to be reduced independently
of the host.
Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/netns/ipv4.h | 1 | ||||
| -rw-r--r-- | include/net/tcp.h | 1 | ||||
| -rw-r--r-- | net/ipv4/sysctl_net_ipv4.c | 14 | ||||
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 4 |
4 files changed, 10 insertions, 10 deletions
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h index f0cf5a1b777e..0378e88f6fd3 100644 --- a/include/net/netns/ipv4.h +++ b/include/net/netns/ipv4.h @@ -110,6 +110,7 @@ struct netns_ipv4 { int sysctl_tcp_orphan_retries; int sysctl_tcp_fin_timeout; unsigned int sysctl_tcp_notsent_lowat; + int sysctl_tcp_tw_reuse; int sysctl_igmp_max_memberships; int sysctl_igmp_max_msf; diff --git a/include/net/tcp.h b/include/net/tcp.h index 207147b4c6b2..6061963cca98 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -252,7 +252,6 @@ extern int sysctl_tcp_wmem[3]; extern int sysctl_tcp_rmem[3]; extern int sysctl_tcp_app_win; extern int sysctl_tcp_adv_win_scale; -extern int sysctl_tcp_tw_reuse; extern int sysctl_tcp_frto; extern int sysctl_tcp_low_latency; extern int sysctl_tcp_nometrics_save; diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index 80bc36b25de2..22cbd61079b5 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -433,13 +433,6 @@ static struct ctl_table ipv4_table[] = { .extra2 = &tcp_adv_win_scale_max, }, { - .procname = "tcp_tw_reuse", - .data = &sysctl_tcp_tw_reuse, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_dointvec - }, - { .procname = "tcp_frto", .data = &sysctl_tcp_frto, .maxlen = sizeof(int), @@ -960,6 +953,13 @@ static struct ctl_table ipv4_net_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, + { + .procname = "tcp_tw_reuse", + .data = &init_net.ipv4.sysctl_tcp_tw_reuse, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec + }, #ifdef CONFIG_IP_ROUTE_MULTIPATH { .procname = "fib_multipath_use_neigh", diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 30d81f533ada..fe9da4fb96bf 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -84,7 +84,6 @@ #include <crypto/hash.h> #include <linux/scatterlist.h> -int sysctl_tcp_tw_reuse __read_mostly; int sysctl_tcp_low_latency __read_mostly; #ifdef CONFIG_TCP_MD5SIG @@ -120,7 +119,7 @@ int tcp_twsk_unique(struct sock *sk, struct sock *sktw, void *twp) and use initial timestamp retrieved from peer table. */ if (tcptw->tw_ts_recent_stamp && - (!twp || (sysctl_tcp_tw_reuse && + (!twp || (sock_net(sk)->ipv4.sysctl_tcp_tw_reuse && get_seconds() - tcptw->tw_ts_recent_stamp > 1))) { tp->write_seq = tcptw->tw_snd_nxt + 65535 + 2; if (tp->write_seq == 0) @@ -2456,6 +2455,7 @@ static int __net_init tcp_sk_init(struct net *net) net->ipv4.sysctl_tcp_orphan_retries = 0; net->ipv4.sysctl_tcp_fin_timeout = TCP_FIN_TIMEOUT; net->ipv4.sysctl_tcp_notsent_lowat = UINT_MAX; + net->ipv4.sysctl_tcp_tw_reuse = 0; return 0; fail: |