summaryrefslogtreecommitdiffstats
path: root/include/net/ip_vs.h
diff options
context:
space:
mode:
authorJulian Anastasov <ja@ssi.bg>2013-03-22 11:46:49 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2013-04-02 00:23:55 +0200
commit578bc3ef1e473abb9ea99046a307fef0094b22af (patch)
tree78c93c431c65e573846e573cdff8afb4924c501c /include/net/ip_vs.h
parent08cb2d032f13da4a076b51639b104a830b6bd18c (diff)
downloadlinux-578bc3ef1e473abb9ea99046a307fef0094b22af.tar.gz
linux-578bc3ef1e473abb9ea99046a307fef0094b22af.tar.bz2
linux-578bc3ef1e473abb9ea99046a307fef0094b22af.zip
ipvs: reorganize dest trash
All dests will go to trash, no exceptions. But we have to use new list node t_list for this, due to RCU changes in following patches. Dests will wait there initial grace period and later all conns and schedulers to put their reference. The dests don't get reference for staying in dest trash as before. As result, we do not load ip_vs_dest_put with extra checks for last refcnt and the schedulers do not need to play games with atomic_inc_not_zero while selecting best destination. Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'include/net/ip_vs.h')
-rw-r--r--include/net/ip_vs.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index 7d3027f2c06e..18aeb85079f8 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -749,6 +749,8 @@ struct ip_vs_dest_dst {
struct rcu_head rcu_head;
};
+/* In grace period after removing */
+#define IP_VS_DEST_STATE_REMOVING 0x01
/*
* The real server destination forwarding entry
* with ip address, port number, and so on.
@@ -766,6 +768,7 @@ struct ip_vs_dest {
atomic_t refcnt; /* reference counter */
struct ip_vs_stats stats; /* statistics */
+ unsigned long state; /* state flags */
/* connection counters and thresholds */
atomic_t activeconns; /* active connections */
@@ -785,6 +788,7 @@ struct ip_vs_dest {
union nf_inet_addr vaddr; /* virtual IP address */
__u32 vfwmark; /* firewall mark of service */
+ struct list_head t_list; /* in dest_trash */
struct rcu_head rcu_head;
unsigned int in_rs_table:1; /* we are in rs_table */
};
@@ -912,6 +916,9 @@ struct ipvs_master_sync_state {
struct netns_ipvs *ipvs;
};
+/* How much time to keep dests in trash */
+#define IP_VS_DEST_TRASH_PERIOD (120 * HZ)
+
/* IPVS in network namespace */
struct netns_ipvs {
int gen; /* Generation */
@@ -961,6 +968,8 @@ struct netns_ipvs {
/* Trash for destinations */
struct list_head dest_trash;
+ spinlock_t dest_trash_lock;
+ struct timer_list dest_trash_timer; /* expiration timer */
/* Service counters */
atomic_t ftpsvc_counter;
atomic_t nullsvc_counter;