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[v4 PATCH 3/6] IPVS: init and cleanup restructuring.

To: ja@xxxxxx, horms@xxxxxxxxxxxx, ebiederm@xxxxxxxxxxxx, lvs-devel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, netfilter-devel@xxxxxxxxxxxxxxx
Subject: [v4 PATCH 3/6] IPVS: init and cleanup restructuring.
Cc: hans.schillstrom@xxxxxxxxxxxx, Hans Schillstrom <hans@xxxxxxxxxxxxxxx>
From: Hans Schillstrom <hans@xxxxxxxxxxxxxxx>
Date: Sun, 1 May 2011 18:50:15 +0200
REVISION 4

DESCRIPTION
This patch tries to restore the initial init and cleanup
sequences that was before namspace patch.

The number of calls to register_pernet_device have been
reduced to one for the ip_vs.ko
Schedulers still have their own calls.

This patch adds a function __ip_vs_service_cleanup()
and a throttle or actually on/off switch for
the netfilter hooks.

The nf hooks will be enabled when the first service is loaded
and disabled when the last service is removed or when a
namespace exit starts.

CHANGES
 Rev 2
        receivening av device events, suggested by Julian.
        This change add 3 new functions ip_vs_dst_event()
        ip_vs_svc_reset() and __ip_vs_dev_reset().

 Rev 3
        Throttle renamed to enable.
        Comments from Julian implemented
        Check enable in ip_vs_in, ip_vs_out and ip_vs_forward_icmp*
        Remove in ip_vs_in_icmp*.
        ip_vs_svc_reset() moved into ip_vs_dst_event().
        ip_vs_service_cleanup() uses ip_vs_flush and mutex lock.
        ip_vs_unlink_service_nolock() added.

 Rev 4
        ip_vs_unlink_service_nolock() removed
        ip_vs_flush() reverted.

Signed-off-by: Hans Schillstrom <hans.schillstrom@xxxxxxxxxxxx>
Signed-off-by: Hans Schillstrom <hans@xxxxxxxxxxxxxxx>
---
 include/net/ip_vs.h              |   17 +++++
 net/netfilter/ipvs/ip_vs_app.c   |   15 +----
 net/netfilter/ipvs/ip_vs_conn.c  |   12 +---
 net/netfilter/ipvs/ip_vs_core.c  |  101 ++++++++++++++++++++++++++++---
 net/netfilter/ipvs/ip_vs_ctl.c   |  123 ++++++++++++++++++++++++++++++++------
 net/netfilter/ipvs/ip_vs_est.c   |   14 +----
 net/netfilter/ipvs/ip_vs_proto.c |   11 +---
 net/netfilter/ipvs/ip_vs_sync.c  |   13 +---
 8 files changed, 226 insertions(+), 80 deletions(-)

diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index d516f00..86aefed 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -791,6 +791,7 @@ struct ip_vs_app {
 /* IPVS in network namespace */
 struct netns_ipvs {
        int                     gen;            /* Generation */
+       int                     enable;         /* enable like nf_hooks do */
        /*
         *      Hash table: for real service lookups
         */
@@ -1089,6 +1090,22 @@ ip_vs_control_add(struct ip_vs_conn *cp, struct 
ip_vs_conn *ctl_cp)
        atomic_inc(&ctl_cp->n_control);
 }
 
+/*
+ * IPVS netns init & cleanup functions
+ */
+extern int __ip_vs_estimator_init(struct net *net);
+extern int __ip_vs_control_init(struct net *net);
+extern int __ip_vs_protocol_init(struct net *net);
+extern int __ip_vs_app_init(struct net *net);
+extern int __ip_vs_conn_init(struct net *net);
+extern int __ip_vs_sync_init(struct net *net);
+extern void __ip_vs_conn_cleanup(struct net *net);
+extern void __ip_vs_app_cleanup(struct net *net);
+extern void __ip_vs_protocol_cleanup(struct net *net);
+extern void __ip_vs_control_cleanup(struct net *net);
+extern void __ip_vs_estimator_cleanup(struct net *net);
+extern void __ip_vs_sync_cleanup(struct net *net);
+extern void __ip_vs_service_cleanup(struct net *net);
 
 /*
  *      IPVS application functions
diff --git a/net/netfilter/ipvs/ip_vs_app.c b/net/netfilter/ipvs/ip_vs_app.c
index 2dc6de1..51f3af7 100644
--- a/net/netfilter/ipvs/ip_vs_app.c
+++ b/net/netfilter/ipvs/ip_vs_app.c
@@ -576,7 +576,7 @@ static const struct file_operations ip_vs_app_fops = {
 };
 #endif
 
-static int __net_init __ip_vs_app_init(struct net *net)
+int __net_init __ip_vs_app_init(struct net *net)
 {
        struct netns_ipvs *ipvs = net_ipvs(net);
 
@@ -585,26 +585,17 @@ static int __net_init __ip_vs_app_init(struct net *net)
        return 0;
 }
 
-static void __net_exit __ip_vs_app_cleanup(struct net *net)
+void __net_exit __ip_vs_app_cleanup(struct net *net)
 {
        proc_net_remove(net, "ip_vs_app");
 }
 
-static struct pernet_operations ip_vs_app_ops = {
-       .init = __ip_vs_app_init,
-       .exit = __ip_vs_app_cleanup,
-};
-
 int __init ip_vs_app_init(void)
 {
-       int rv;
-
-       rv = register_pernet_subsys(&ip_vs_app_ops);
-       return rv;
+       return 0;
 }
 
 
 void ip_vs_app_cleanup(void)
 {
-       unregister_pernet_subsys(&ip_vs_app_ops);
 }
diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c
index c97bd45..d3fd91b 100644
--- a/net/netfilter/ipvs/ip_vs_conn.c
+++ b/net/netfilter/ipvs/ip_vs_conn.c
@@ -1258,22 +1258,17 @@ int __net_init __ip_vs_conn_init(struct net *net)
        return 0;
 }
 
-static void __net_exit __ip_vs_conn_cleanup(struct net *net)
+void __net_exit __ip_vs_conn_cleanup(struct net *net)
 {
        /* flush all the connection entries first */
        ip_vs_conn_flush(net);
        proc_net_remove(net, "ip_vs_conn");
        proc_net_remove(net, "ip_vs_conn_sync");
 }
-static struct pernet_operations ipvs_conn_ops = {
-       .init = __ip_vs_conn_init,
-       .exit = __ip_vs_conn_cleanup,
-};
 
 int __init ip_vs_conn_init(void)
 {
        int idx;
-       int retc;
 
        /* Compute size and mask */
        ip_vs_conn_tab_size = 1 << ip_vs_conn_tab_bits;
@@ -1309,17 +1304,14 @@ int __init ip_vs_conn_init(void)
                rwlock_init(&__ip_vs_conntbl_lock_array[idx].l);
        }
 
-       retc = register_pernet_subsys(&ipvs_conn_ops);
-
        /* calculate the random value for connection hash */
        get_random_bytes(&ip_vs_conn_rnd, sizeof(ip_vs_conn_rnd));
 
-       return retc;
+       return 0;
 }
 
 void ip_vs_conn_cleanup(void)
 {
-       unregister_pernet_subsys(&ipvs_conn_ops);
        /* Release the empty cache */
        kmem_cache_destroy(ip_vs_conn_cachep);
        vfree(ip_vs_conn_tab);
diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index d536b51..b9debc9 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -1113,6 +1113,9 @@ ip_vs_out(unsigned int hooknum, struct sk_buff *skb, int 
af)
                return NF_ACCEPT;
 
        net = skb_net(skb);
+       if (!net_ipvs(net)->enable)
+               return NF_ACCEPT;
+
        ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
 #ifdef CONFIG_IP_VS_IPV6
        if (af == AF_INET6) {
@@ -1343,6 +1346,7 @@ ip_vs_in_icmp(struct sk_buff *skb, int *related, unsigned 
int hooknum)
                return NF_ACCEPT; /* The packet looks wrong, ignore */
 
        net = skb_net(skb);
+
        pd = ip_vs_proto_data_get(net, cih->protocol);
        if (!pd)
                return NF_ACCEPT;
@@ -1529,6 +1533,11 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int 
af)
                              IP_VS_DBG_ADDR(af, &iph.daddr), hooknum);
                return NF_ACCEPT;
        }
+       /* ipvs enabled in this netns ? */
+       net = skb_net(skb);
+       if (!net_ipvs(net)->enable)
+               return NF_ACCEPT;
+
        ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
 
        /* Bad... Do not break raw sockets */
@@ -1562,7 +1571,6 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int 
af)
                        ip_vs_fill_iphdr(af, skb_network_header(skb), &iph);
                }
 
-       net = skb_net(skb);
        /* Protocol supported? */
        pd = ip_vs_proto_data_get(net, iph.protocol);
        if (unlikely(!pd))
@@ -1588,7 +1596,6 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int 
af)
        }
 
        IP_VS_DBG_PKT(11, af, pp, skb, 0, "Incoming packet");
-       net = skb_net(skb);
        ipvs = net_ipvs(net);
        /* Check the server status */
        if (cp->dest && !(cp->dest->flags & IP_VS_DEST_F_AVAILABLE)) {
@@ -1743,10 +1750,16 @@ ip_vs_forward_icmp(unsigned int hooknum, struct sk_buff 
*skb,
                   int (*okfn)(struct sk_buff *))
 {
        int r;
+       struct net *net;
 
        if (ip_hdr(skb)->protocol != IPPROTO_ICMP)
                return NF_ACCEPT;
 
+       /* ipvs enabled in this netns ? */
+       net = skb_net(skb);
+       if (!net_ipvs(net)->enable)
+               return NF_ACCEPT;
+
        return ip_vs_in_icmp(skb, &r, hooknum);
 }
 
@@ -1757,10 +1770,16 @@ ip_vs_forward_icmp_v6(unsigned int hooknum, struct 
sk_buff *skb,
                      int (*okfn)(struct sk_buff *))
 {
        int r;
+       struct net *net;
 
        if (ipv6_hdr(skb)->nexthdr != IPPROTO_ICMPV6)
                return NF_ACCEPT;
 
+       /* ipvs enabled in this netns ? */
+       net = skb_net(skb);
+       if (!net_ipvs(net)->enable)
+               return NF_ACCEPT;
+
        return ip_vs_in_icmp_v6(skb, &r, hooknum);
 }
 #endif
@@ -1884,21 +1903,72 @@ static int __net_init __ip_vs_init(struct net *net)
                pr_err("%s(): no memory.\n", __func__);
                return -ENOMEM;
        }
+       /* Hold the beast until a service is registerd */
+       ipvs->enable = 0;
        ipvs->net = net;
        /* Counters used for creating unique names */
        ipvs->gen = atomic_read(&ipvs_netns_cnt);
        atomic_inc(&ipvs_netns_cnt);
        net->ipvs = ipvs;
+
+       if (__ip_vs_estimator_init(net) < 0)
+               goto estimator_fail;
+
+       if (__ip_vs_control_init(net) < 0)
+               goto control_fail;
+
+       if (__ip_vs_protocol_init(net) < 0)
+               goto protocol_fail;
+
+       if (__ip_vs_app_init(net) < 0)
+               goto app_fail;
+
+       if (__ip_vs_conn_init(net) < 0)
+               goto conn_fail;
+
+       if (__ip_vs_sync_init(net) < 0)
+               goto sync_fail;
+
        printk(KERN_INFO "IPVS: Creating netns size=%zu id=%d\n",
                         sizeof(struct netns_ipvs), ipvs->gen);
        return 0;
+/*
+ * Error handling
+ */
+
+sync_fail:
+       __ip_vs_conn_cleanup(net);
+conn_fail:
+       __ip_vs_app_cleanup(net);
+app_fail:
+       __ip_vs_protocol_cleanup(net);
+protocol_fail:
+       __ip_vs_control_cleanup(net);
+control_fail:
+       __ip_vs_estimator_cleanup(net);
+estimator_fail:
+       return -ENOMEM;
 }
 
 static void __net_exit __ip_vs_cleanup(struct net *net)
 {
+       __ip_vs_service_cleanup(net);   /* ip_vs_flush() with locks */
+       __ip_vs_conn_cleanup(net);
+       __ip_vs_app_cleanup(net);
+       __ip_vs_protocol_cleanup(net);
+       __ip_vs_control_cleanup(net);
+       __ip_vs_estimator_cleanup(net);
        IP_VS_DBG(2, "ipvs netns %d released\n", net_ipvs(net)->gen);
 }
 
+static void __net_exit __ip_vs_dev_cleanup(struct net *net)
+{
+       EnterFunction(2);
+       net_ipvs(net)->enable = 0;      /* Disable packet reception */
+       __ip_vs_sync_cleanup(net);
+       LeaveFunction(2);
+}
+
 static struct pernet_operations ipvs_core_ops = {
        .init = __ip_vs_init,
        .exit = __ip_vs_cleanup,
@@ -1906,6 +1976,10 @@ static struct pernet_operations ipvs_core_ops = {
        .size = sizeof(struct netns_ipvs),
 };
 
+static struct pernet_operations ipvs_core_dev_ops = {
+       .exit = __ip_vs_dev_cleanup,
+};
+
 /*
  *     Initialize IP Virtual Server
  */
@@ -1913,10 +1987,6 @@ static int __init ip_vs_init(void)
 {
        int ret;
 
-       ret = register_pernet_subsys(&ipvs_core_ops);   /* Alloc ip_vs struct */
-       if (ret < 0)
-               return ret;
-
        ip_vs_estimator_init();
        ret = ip_vs_control_init();
        if (ret < 0) {
@@ -1944,15 +2014,28 @@ static int __init ip_vs_init(void)
                goto cleanup_conn;
        }
 
+       ret = register_pernet_subsys(&ipvs_core_ops);   /* Alloc ip_vs struct */
+       if (ret < 0)
+               goto cleanup_sync;
+
+       ret = register_pernet_device(&ipvs_core_dev_ops);
+       if (ret < 0)
+               goto cleanup_sub;
+
        ret = nf_register_hooks(ip_vs_ops, ARRAY_SIZE(ip_vs_ops));
        if (ret < 0) {
                pr_err("can't register hooks.\n");
-               goto cleanup_sync;
+               goto cleanup_dev;
        }
 
        pr_info("ipvs loaded.\n");
+
        return ret;
 
+cleanup_dev:
+       unregister_pernet_device(&ipvs_core_dev_ops);
+cleanup_sub:
+       unregister_pernet_subsys(&ipvs_core_ops);
 cleanup_sync:
        ip_vs_sync_cleanup();
 cleanup_conn:
@@ -1964,20 +2047,20 @@ cleanup_protocol:
        ip_vs_control_cleanup();
 cleanup_estimator:
        ip_vs_estimator_cleanup();
-       unregister_pernet_subsys(&ipvs_core_ops);       /* free ip_vs struct */
        return ret;
 }
 
 static void __exit ip_vs_cleanup(void)
 {
        nf_unregister_hooks(ip_vs_ops, ARRAY_SIZE(ip_vs_ops));
+       unregister_pernet_device(&ipvs_core_dev_ops);
+       unregister_pernet_subsys(&ipvs_core_ops);       /* free ip_vs struct */
        ip_vs_sync_cleanup();
        ip_vs_conn_cleanup();
        ip_vs_app_cleanup();
        ip_vs_protocol_cleanup();
        ip_vs_control_cleanup();
        ip_vs_estimator_cleanup();
-       unregister_pernet_subsys(&ipvs_core_ops);       /* free ip_vs struct */
        pr_info("ipvs unloaded.\n");
 }
 
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index a31a70c..fe8891f 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -69,6 +69,11 @@ int ip_vs_get_debug_level(void)
 }
 #endif
 
+
+/*  Protos */
+static void __ip_vs_del_service(struct ip_vs_service *svc);
+
+
 #ifdef CONFIG_IP_VS_IPV6
 /* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
 static int __ip_vs_addr_is_local_v6(struct net *net,
@@ -345,6 +350,9 @@ static int ip_vs_svc_unhash(struct ip_vs_service *svc)
 
        svc->flags &= ~IP_VS_SVC_F_HASHED;
        atomic_dec(&svc->refcnt);
+       /* No more services, no need for input */
+       if (atomic_read(&svc->refcnt) == 0)
+               net_ipvs(svc->net)->enable = 0;
        return 1;
 }
 
@@ -1214,6 +1222,8 @@ ip_vs_add_service(struct net *net, struct 
ip_vs_service_user_kern *u,
        write_unlock_bh(&__ip_vs_svc_lock);
 
        *svc_p = svc;
+       /* Now there is a service - full throttle */
+       ipvs->enable = 1;
        return 0;
 
 
@@ -1472,6 +1482,84 @@ static int ip_vs_flush(struct net *net)
        return 0;
 }
 
+/*
+ *     Delete service by {netns} in the service table.
+ *     Called by __ip_vs_cleanup()
+ */
+void __ip_vs_service_cleanup(struct net *net)
+{
+       EnterFunction(2);
+       /* Check for "full" addressed entries */
+       mutex_lock(&__ip_vs_mutex);
+       ip_vs_flush(net);
+       mutex_unlock(&__ip_vs_mutex);
+       LeaveFunction(2);
+}
+/*
+ * Release dst hold by dst_cache
+ */
+static inline void
+__ip_vs_dev_reset(struct ip_vs_dest *dest, struct net_device *dev)
+{
+       spin_lock_bh(&dest->dst_lock);
+       if (dest->dst_cache && dest->dst_cache->dev == dev) {
+               IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
+                             dev->name,
+                             IP_VS_DBG_ADDR(dest->af, &dest->addr),
+                             ntohs(dest->port),
+                             atomic_read(&dest->refcnt));
+               ip_vs_dst_reset(dest);
+       }
+       spin_unlock_bh(&dest->dst_lock);
+
+}
+/*
+ * Netdev event receiver
+ * Currently only NETDEV_UNREGISTER is handled, i.e. if we hold a reference to
+ * a device that is "unregister" it must be released.
+ */
+static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
+                           void *ptr)
+{
+       struct net_device *dev = ptr;
+       struct net *net = dev_net(dev);
+       struct ip_vs_service *svc;
+       struct ip_vs_dest *dest;
+       unsigned int idx;
+
+       if (event != NETDEV_UNREGISTER)
+               return NOTIFY_DONE;
+       IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
+       EnterFunction(2);
+       mutex_lock(&__ip_vs_mutex);
+       for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
+               list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
+                       if (net_eq(svc->net, net)) {
+                               list_for_each_entry(dest, &svc->destinations,
+                                                   n_list) {
+                                       __ip_vs_dev_reset(dest, dev);
+                               }
+                       }
+               }
+
+               list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
+                       if (net_eq(svc->net, net)) {
+                               list_for_each_entry(dest, &svc->destinations,
+                                                   n_list) {
+                                       __ip_vs_dev_reset(dest, dev);
+                               }
+                       }
+
+               }
+       }
+
+       list_for_each_entry(dest, &net_ipvs(net)->dest_trash, n_list) {
+               __ip_vs_dev_reset(dest, dev);
+       }
+       mutex_unlock(&__ip_vs_mutex);
+       LeaveFunction(2);
+       return NOTIFY_DONE;
+}
 
 /*
  *     Zero counters in a service or all services
@@ -3588,6 +3676,10 @@ void __net_init __ip_vs_control_cleanup_sysctl(struct 
net *net) { }
 
 #endif
 
+static struct notifier_block ip_vs_dst_notifier = {
+       .notifier_call = ip_vs_dst_event,
+};
+
 int __net_init __ip_vs_control_init(struct net *net)
 {
        int idx;
@@ -3626,7 +3718,7 @@ err:
        return -ENOMEM;
 }
 
-static void __net_exit __ip_vs_control_cleanup(struct net *net)
+void __net_exit __ip_vs_control_cleanup(struct net *net)
 {
        struct netns_ipvs *ipvs = net_ipvs(net);
 
@@ -3639,11 +3731,6 @@ static void __net_exit __ip_vs_control_cleanup(struct 
net *net)
        free_percpu(ipvs->tot_stats.cpustats);
 }
 
-static struct pernet_operations ipvs_control_ops = {
-       .init = __ip_vs_control_init,
-       .exit = __ip_vs_control_cleanup,
-};
-
 int __init ip_vs_control_init(void)
 {
        int idx;
@@ -3657,33 +3744,32 @@ int __init ip_vs_control_init(void)
                INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]);
        }
 
-       ret = register_pernet_subsys(&ipvs_control_ops);
-       if (ret) {
-               pr_err("cannot register namespace.\n");
-               goto err;
-       }
-
        smp_wmb();      /* Do we really need it now ? */
 
        ret = nf_register_sockopt(&ip_vs_sockopts);
        if (ret) {
                pr_err("cannot register sockopt.\n");
-               goto err_net;
+               goto err_sock;
        }
 
        ret = ip_vs_genl_register();
        if (ret) {
                pr_err("cannot register Generic Netlink interface.\n");
-               nf_unregister_sockopt(&ip_vs_sockopts);
-               goto err_net;
+               goto err_genl;
        }
 
+       ret = register_netdevice_notifier(&ip_vs_dst_notifier);
+       if (ret < 0)
+               goto err_notf;
+
        LeaveFunction(2);
        return 0;
 
-err_net:
-       unregister_pernet_subsys(&ipvs_control_ops);
-err:
+err_notf:
+       ip_vs_genl_unregister();
+err_genl:
+       nf_unregister_sockopt(&ip_vs_sockopts);
+err_sock:
        return ret;
 }
 
@@ -3691,7 +3777,6 @@ err:
 void ip_vs_control_cleanup(void)
 {
        EnterFunction(2);
-       unregister_pernet_subsys(&ipvs_control_ops);
        ip_vs_genl_unregister();
        nf_unregister_sockopt(&ip_vs_sockopts);
        LeaveFunction(2);
diff --git a/net/netfilter/ipvs/ip_vs_est.c b/net/netfilter/ipvs/ip_vs_est.c
index 8c8766c..508cce9 100644
--- a/net/netfilter/ipvs/ip_vs_est.c
+++ b/net/netfilter/ipvs/ip_vs_est.c
@@ -192,7 +192,7 @@ void ip_vs_read_estimator(struct ip_vs_stats_user *dst,
        dst->outbps = (e->outbps + 0xF) >> 5;
 }
 
-static int __net_init __ip_vs_estimator_init(struct net *net)
+int __net_init __ip_vs_estimator_init(struct net *net)
 {
        struct netns_ipvs *ipvs = net_ipvs(net);
 
@@ -203,24 +203,16 @@ static int __net_init __ip_vs_estimator_init(struct net 
*net)
        return 0;
 }
 
-static void __net_exit __ip_vs_estimator_exit(struct net *net)
+void __net_exit __ip_vs_estimator_cleanup(struct net *net)
 {
        del_timer_sync(&net_ipvs(net)->est_timer);
 }
-static struct pernet_operations ip_vs_app_ops = {
-       .init = __ip_vs_estimator_init,
-       .exit = __ip_vs_estimator_exit,
-};
 
 int __init ip_vs_estimator_init(void)
 {
-       int rv;
-
-       rv = register_pernet_subsys(&ip_vs_app_ops);
-       return rv;
+       return 0;
 }
 
 void ip_vs_estimator_cleanup(void)
 {
-       unregister_pernet_subsys(&ip_vs_app_ops);
 }
diff --git a/net/netfilter/ipvs/ip_vs_proto.c b/net/netfilter/ipvs/ip_vs_proto.c
index 17484a4..eb86028 100644
--- a/net/netfilter/ipvs/ip_vs_proto.c
+++ b/net/netfilter/ipvs/ip_vs_proto.c
@@ -316,7 +316,7 @@ ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp,
 /*
  * per network name-space init
  */
-static int __net_init __ip_vs_protocol_init(struct net *net)
+int __net_init __ip_vs_protocol_init(struct net *net)
 {
 #ifdef CONFIG_IP_VS_PROTO_TCP
        register_ip_vs_proto_netns(net, &ip_vs_protocol_tcp);
@@ -336,7 +336,7 @@ static int __net_init __ip_vs_protocol_init(struct net *net)
        return 0;
 }
 
-static void __net_exit __ip_vs_protocol_cleanup(struct net *net)
+void __net_exit __ip_vs_protocol_cleanup(struct net *net)
 {
        struct netns_ipvs *ipvs = net_ipvs(net);
        struct ip_vs_proto_data *pd;
@@ -349,11 +349,6 @@ static void __net_exit __ip_vs_protocol_cleanup(struct net 
*net)
        }
 }
 
-static struct pernet_operations ipvs_proto_ops = {
-       .init = __ip_vs_protocol_init,
-       .exit = __ip_vs_protocol_cleanup,
-};
-
 int __init ip_vs_protocol_init(void)
 {
        char protocols[64];
@@ -382,7 +377,6 @@ int __init ip_vs_protocol_init(void)
        REGISTER_PROTOCOL(&ip_vs_protocol_esp);
 #endif
        pr_info("Registered protocols (%s)\n", &protocols[2]);
-       return register_pernet_subsys(&ipvs_proto_ops);
 
        return 0;
 }
@@ -393,7 +387,6 @@ void ip_vs_protocol_cleanup(void)
        struct ip_vs_protocol *pp;
        int i;
 
-       unregister_pernet_subsys(&ipvs_proto_ops);
        /* unregister all the ipvs protocols */
        for (i = 0; i < IP_VS_PROTO_TAB_SIZE; i++) {
                while ((pp = ip_vs_proto_table[i]) != NULL)
diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
index 0cce953..e292e5b 100644
--- a/net/netfilter/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c
@@ -1663,7 +1663,7 @@ int stop_sync_thread(struct net *net, int state)
 /*
  * Initialize data struct for each netns
  */
-static int __net_init __ip_vs_sync_init(struct net *net)
+int __net_init __ip_vs_sync_init(struct net *net)
 {
        struct netns_ipvs *ipvs = net_ipvs(net);
 
@@ -1677,7 +1677,7 @@ static int __net_init __ip_vs_sync_init(struct net *net)
        return 0;
 }
 
-static void __ip_vs_sync_cleanup(struct net *net)
+void __ip_vs_sync_cleanup(struct net *net)
 {
        int retc;
 
@@ -1690,18 +1690,11 @@ static void __ip_vs_sync_cleanup(struct net *net)
                pr_err("Failed to stop Backup Daemon\n");
 }
 
-static struct pernet_operations ipvs_sync_ops = {
-       .init = __ip_vs_sync_init,
-       .exit = __ip_vs_sync_cleanup,
-};
-
-
 int __init ip_vs_sync_init(void)
 {
-       return register_pernet_device(&ipvs_sync_ops);
+       return 0;
 }
 
 void ip_vs_sync_cleanup(void)
 {
-       unregister_pernet_device(&ipvs_sync_ops);
 }
-- 
1.7.2.3

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