[Devel] [PATCH RHEL7 COMMIT] ms/netfilter: ipt_CLUSTERIP: make clusterip_list per net namespace

[Konstantin Khorenko]

The commit is pushed to "branch-rh7-3.10.0-123.1.2-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-123.1.2.vz7.5.22
------>
commit 48cc3455701e7835b6af01fbf51fddcae0dd17d9
Author: Gao feng <gaofeng at cn.fujitsu.com>
Date:   Mon Jun 29 17:59:23 2015 +0400

    ms/netfilter: ipt_CLUSTERIP: make clusterip_list per net namespace
    
    clusterip_configs should be per net namespace, so operate
    cluster in one net namespace won't affect other net
    namespace. right now, only allow to operate the clusterip_configs
    of init net namespace.
    
    Signed-off-by: Gao feng <gaofeng at cn.fujitsu.com>
    Signed-off-by: Pablo Neira Ayuso <pablo at netfilter.org>
    (cherry picked from commit 26a89e435462bfdde586ad062bf190cdbfe53a49)
    Signed-off-by: Vladimir Davydov <vdavydov at parallels.com>
---
 net/ipv4/netfilter/ipt_CLUSTERIP.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c b/net/ipv4/netfilter/ipt_CLUSTERIP.c
index 2ba91c4..bed4137 100644
--- a/net/ipv4/netfilter/ipt_CLUSTERIP.c
+++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c
@@ -58,8 +58,6 @@ struct clusterip_config {
 	struct rcu_head rcu;
 };
 
-static LIST_HEAD(clusterip_configs);
-
 /* clusterip_lock protects the clusterip_configs list */
 static DEFINE_SPINLOCK(clusterip_lock);
 
@@ -70,6 +68,7 @@ static const struct file_operations clusterip_proc_fops;
 static int clusterip_net_id __read_mostly;
 
 struct clusterip_net {
+	struct list_head configs;
 #ifdef CONFIG_PROC_FS
 	struct proc_dir_entry *procdir;
 #endif
@@ -124,8 +123,9 @@ static struct clusterip_config *
 __clusterip_config_find(__be32 clusterip)
 {
 	struct clusterip_config *c;
+	struct clusterip_net *cn = net_generic(&init_net, clusterip_net_id);
 
-	list_for_each_entry_rcu(c, &clusterip_configs, list) {
+	list_for_each_entry_rcu(c, &cn->configs, list) {
 		if (c->clusterip == clusterip)
 			return c;
 	}
@@ -199,7 +199,7 @@ clusterip_config_init(const struct ipt_clusterip_tgt_info *i, __be32 ip,
 #endif
 
 	spin_lock_bh(&clusterip_lock);
-	list_add_rcu(&c->list, &clusterip_configs);
+	list_add_rcu(&c->list, &cn->configs);
 	spin_unlock_bh(&clusterip_lock);
 
 	return c;
@@ -709,9 +709,11 @@ static const struct file_operations clusterip_proc_fops = {
 
 static int clusterip_net_init(struct net *net)
 {
-#ifdef CONFIG_PROC_FS
 	struct clusterip_net *cn = net_generic(net, clusterip_net_id);
 
+	INIT_LIST_HEAD(&cn->configs);
+
+#ifdef CONFIG_PROC_FS
 	cn->procdir = proc_mkdir("ipt_CLUSTERIP", net->proc_net);
 	if (!cn->procdir) {
 		pr_err("Unable to proc dir entry\n");