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authorJulian Anastasov <ja@ssi.bg>2013-06-24 22:44:41 +0300
committerSimon Horman <horms@verge.net.au>2013-06-26 18:01:46 +0900
commit4d0c875dcc4923476f364e83912d134da2df224c (patch)
treede662531facb4cd1629d0b2b9e8cac996a08a9be /net
parenteba3b5a78799d21dea05118b294524958f0ab592 (diff)
downloadlinux-4d0c875dcc4923476f364e83912d134da2df224c.tar.bz2
ipvs: add sync_persist_mode flag
Add sync_persist_mode flag to reduce sync traffic by syncing only persistent templates. Signed-off-by: Julian Anastasov <ja@ssi.bg> Tested-by: Aleksey Chudov <aleksey.chudov@gmail.com> Signed-off-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/ipvs/ip_vs_ctl.c7
-rw-r--r--net/netfilter/ipvs/ip_vs_sync.c12
2 files changed, 19 insertions, 0 deletions
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index da035fc01eb2..c8148e487386 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -1715,6 +1715,12 @@ static struct ctl_table vs_vars[] = {
.proc_handler = &proc_do_sync_ports,
},
{
+ .procname = "sync_persist_mode",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
.procname = "sync_qlen_max",
.maxlen = sizeof(unsigned long),
.mode = 0644,
@@ -3729,6 +3735,7 @@ static int __net_init ip_vs_control_net_init_sysctl(struct net *net)
tbl[idx++].data = &ipvs->sysctl_sync_ver;
ipvs->sysctl_sync_ports = 1;
tbl[idx++].data = &ipvs->sysctl_sync_ports;
+ tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
ipvs->sysctl_sync_sock_size = 0;
diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
index 2fc66394d86d..f4484719f3e6 100644
--- a/net/netfilter/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c
@@ -425,6 +425,16 @@ ip_vs_sync_buff_create_v0(struct netns_ipvs *ipvs)
return sb;
}
+/* Check if connection is controlled by persistence */
+static inline bool in_persistence(struct ip_vs_conn *cp)
+{
+ for (cp = cp->control; cp; cp = cp->control) {
+ if (cp->flags & IP_VS_CONN_F_TEMPLATE)
+ return true;
+ }
+ return false;
+}
+
/* Check if conn should be synced.
* pkts: conn packets, use sysctl_sync_threshold to avoid packet check
* - (1) sync_refresh_period: reduce sync rate. Additionally, retry
@@ -447,6 +457,8 @@ static int ip_vs_sync_conn_needed(struct netns_ipvs *ipvs,
/* Check if we sync in current state */
if (unlikely(cp->flags & IP_VS_CONN_F_TEMPLATE))
force = 0;
+ else if (unlikely(sysctl_sync_persist_mode(ipvs) && in_persistence(cp)))
+ return 0;
else if (likely(cp->protocol == IPPROTO_TCP)) {
if (!((1 << cp->state) &
((1 << IP_VS_TCP_S_ESTABLISHED) |