[PATCH 19/22] IPVS: netns, trash handling

[Simon Horman <horms@verge.net.au>]

From: Hans Schillstrom <hans.schillstrom@ericsson.com>

trash list per namspace,
and reordering of some params in dst struct.

Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
---
 include/net/ip_vs.h            |    4 ++--
 include/net/netns/ip_vs.h      |    3 +++
 net/netfilter/ipvs/ip_vs_ctl.c |   23 +++++++++++------------
 3 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index fbe660f..b23bea6 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -662,8 +662,8 @@ struct ip_vs_dest {
 	struct list_head	d_list;   /* for table with all the dests */
 
 	u16			af;		/* address family */
-	union nf_inet_addr	addr;		/* IP address of the server */
 	__be16			port;		/* port number of the server */
+	union nf_inet_addr	addr;		/* IP address of the server */
 	volatile unsigned	flags;		/* dest status flags */
 	atomic_t		conn_flags;	/* flags to copy to conn */
 	atomic_t		weight;		/* server weight */
@@ -690,8 +690,8 @@ struct ip_vs_dest {
 	/* for virtual service */
 	struct ip_vs_service	*svc;		/* service it belongs to */
 	__u16			protocol;	/* which protocol (TCP/UDP) */
-	union nf_inet_addr	vaddr;		/* virtual IP address */
 	__be16			vport;		/* virtual port number */
+	union nf_inet_addr	vaddr;		/* virtual IP address */
 	__u32			vfwmark;	/* firewall mark of service */
 };
 
diff --git a/include/net/netns/ip_vs.h b/include/net/netns/ip_vs.h
index 4133261..67ca1cf 100644
--- a/include/net/netns/ip_vs.h
+++ b/include/net/netns/ip_vs.h
@@ -82,6 +82,9 @@ struct netns_ipvs {
 	rwlock_t		rs_lock;         /* real services table */
 	/* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
 	struct lock_class_key	ctl_key;	/* ctl_mutex debuging */
+	/* Trash for destinations */
+	struct list_head	dest_trash;
+
 	/* sys-ctl struct */
 	struct ctl_table_header	*sysctl_hdr;
 	struct ctl_table	*sysctl_tbl;
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index 5b167aa..f99f075 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -257,11 +257,6 @@ static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
 static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
 
 /*
- *	Trash for destinations
- */
-static LIST_HEAD(ip_vs_dest_trash);
-
-/*
  *	FTP & NULL virtual service counters
  */
 static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0);
@@ -652,11 +647,12 @@ ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
 		     __be16 dport)
 {
 	struct ip_vs_dest *dest, *nxt;
+	struct netns_ipvs *ipvs = net_ipvs(svc->net);
 
 	/*
 	 * Find the destination in trash
 	 */
-	list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
+	list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, n_list) {
 		IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
 			      "dest->refcnt=%d\n",
 			      dest->vfwmark,
@@ -705,11 +701,12 @@ ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
  *  are expired, and the refcnt of each destination in the trash must
  *  be 1, so we simply release them here.
  */
-static void ip_vs_trash_cleanup(void)
+static void ip_vs_trash_cleanup(struct net *net)
 {
 	struct ip_vs_dest *dest, *nxt;
+	struct netns_ipvs *ipvs = net_ipvs(net);
 
-	list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
+	list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, n_list) {
 		list_del(&dest->n_list);
 		ip_vs_dst_reset(dest);
 		__ip_vs_unbind_svc(dest);
@@ -1023,7 +1020,7 @@ static void __ip_vs_del_dest(struct net *net, struct ip_vs_dest *dest)
 			      IP_VS_DBG_ADDR(dest->af, &dest->addr),
 			      ntohs(dest->port),
 			      atomic_read(&dest->refcnt));
-		list_add(&dest->n_list, &ip_vs_dest_trash);
+		list_add(&dest->n_list, &ipvs->dest_trash);
 		atomic_inc(&dest->refcnt);
 	}
 }
@@ -3505,6 +3502,8 @@ int __net_init __ip_vs_control_init(struct net *net)
 	for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
 		INIT_LIST_HEAD(&ipvs->rs_table[idx]);
 
+	INIT_LIST_HEAD(&ipvs->dest_trash);
+
 	/* procfs stats */
 	ipvs->tot_stats = kzalloc(sizeof(struct ip_vs_stats), GFP_KERNEL);
 	if (ipvs->tot_stats == NULL) {
@@ -3586,13 +3585,14 @@ static void __net_exit __ip_vs_control_cleanup(struct net *net)
 	if (!net_eq(net, &init_net))	/* netns not enabled yet */
 		return;
 
+	ip_vs_trash_cleanup(net);
 	ip_vs_kill_estimator(net, ipvs->tot_stats);
+	cancel_rearming_delayed_work(&ipvs->defense_work);
+	cancel_work_sync(&ipvs->defense_work.work);
 	unregister_net_sysctl_table(ipvs->sysctl_hdr);
 	proc_net_remove(net, "ip_vs_stats_percpu");
 	proc_net_remove(net, "ip_vs_stats");
 	proc_net_remove(net, "ip_vs");
-	cancel_rearming_delayed_work(&ipvs->defense_work);
-	cancel_work_sync(&ipvs->defense_work.work);
 	free_percpu(ipvs->cpustats);
 	kfree(ipvs->tot_stats);
 }
@@ -3649,7 +3649,6 @@ err:
 void ip_vs_control_cleanup(void)
 {
 	EnterFunction(2);
-	ip_vs_trash_cleanup();
 	unregister_pernet_subsys(&ipvs_control_ops);
 	ip_vs_genl_unregister();
 	nf_unregister_sockopt(&ip_vs_sockopts);
-- 
1.7.2.3