[IPVS]: Switch to using ctl_paths.

The feature of ipvs ctls is that the net/ipv4/vs path
is common for core ipvs ctls and for two schedulers,
so I make it exported and re-use it in modules.

Two other .c files required linux/sysctl.h to make the
extern declaration of this path compile well.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Acked-by: NSimon Horman <horms@verge.net.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/ip_vs.h

@@ -9,6 +9,8 @@
 #include <asm/types.h>		/* For __uXX types */
 #include <linux/types.h>	/* For __beXX types in userland */
 
+#include <linux/sysctl.h>	/* For ctl_path */
+
 #define IP_VS_VERSION_CODE	0x010201
 #define NVERSION(version)			\
 	(version >> 16) & 0xFF,			\
@@ -854,6 +856,7 @@ extern int sysctl_ip_vs_expire_quiescent_template;
 extern int sysctl_ip_vs_sync_threshold[2];
 extern int sysctl_ip_vs_nat_icmp_send;
 extern struct ip_vs_stats ip_vs_stats;
+extern struct ctl_path net_vs_ctl_path[];
 
 extern struct ip_vs_service *
 ip_vs_service_get(__u32 fwmark, __u16 protocol, __be32 vaddr, __be16 vport);

net/ipv4/ipvs/ip_vs_ctl.c

@@ -1591,34 +1591,13 @@ static struct ctl_table vs_vars[] = {
 	{ .ctl_name = 0 }
 };
 
-static ctl_table vs_table[] = {
-	{
-		.procname	= "vs",
-		.mode		= 0555,
-		.child		= vs_vars
-	},
-	{ .ctl_name = 0 }
-};
-
-static ctl_table ipvs_ipv4_table[] = {
-	{
-		.ctl_name	= NET_IPV4,
-		.procname	= "ipv4",
-		.mode		= 0555,
-		.child		= vs_table,
-	},
-	{ .ctl_name = 0 }
-};
-
-static ctl_table vs_root_table[] = {
-	{
-		.ctl_name	= CTL_NET,
-		.procname	= "net",
-		.mode		= 0555,
-		.child		= ipvs_ipv4_table,
-	},
-	{ .ctl_name = 0 }
+struct ctl_path net_vs_ctl_path[] = {
+	{ .procname = "net", .ctl_name = CTL_NET, },
+	{ .procname = "ipv4", .ctl_name = NET_IPV4, },
+	{ .procname = "vs", },
+	{ }
 };
+EXPORT_SYMBOL_GPL(net_vs_ctl_path);
 
 static struct ctl_table_header * sysctl_header;
 
@@ -2345,7 +2324,7 @@ int ip_vs_control_init(void)
 	proc_net_fops_create(&init_net, "ip_vs", 0, &ip_vs_info_fops);
 	proc_net_fops_create(&init_net, "ip_vs_stats",0, &ip_vs_stats_fops);
 
-	sysctl_header = register_sysctl_table(vs_root_table);
+	sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars);
 
 	/* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */
 	for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++)  {

net/ipv4/ipvs/ip_vs_est.c

@@ -18,6 +18,7 @@
 #include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/interrupt.h>
+#include <linux/sysctl.h>
 
 #include <net/ip_vs.h>
 

net/ipv4/ipvs/ip_vs_lblc.c

@@ -123,35 +123,6 @@ static ctl_table vs_vars_table[] = {
 	{ .ctl_name = 0 }
 };
 
-static ctl_table vs_table[] = {
-	{
-		.procname	= "vs",
-		.mode		= 0555,
-		.child		= vs_vars_table
-	},
-	{ .ctl_name = 0 }
-};
-
-static ctl_table ipvs_ipv4_table[] = {
-	{
-		.ctl_name	= NET_IPV4,
-		.procname	= "ipv4",
-		.mode		= 0555,
-		.child		= vs_table
-	},
-	{ .ctl_name = 0 }
-};
-
-static ctl_table lblc_root_table[] = {
-	{
-		.ctl_name	= CTL_NET,
-		.procname	= "net",
-		.mode		= 0555,
-		.child		= ipvs_ipv4_table
-	},
-	{ .ctl_name = 0 }
-};
-
 static struct ctl_table_header * sysctl_header;
 
 /*
@@ -582,7 +553,7 @@ static int __init ip_vs_lblc_init(void)
 	int ret;
 
 	INIT_LIST_HEAD(&ip_vs_lblc_scheduler.n_list);
-	sysctl_header = register_sysctl_table(lblc_root_table);
+	sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars_table);
 	ret = register_ip_vs_scheduler(&ip_vs_lblc_scheduler);
 	if (ret)
 		unregister_sysctl_table(sysctl_header);

net/ipv4/ipvs/ip_vs_lblcr.c

@@ -311,35 +311,6 @@ static ctl_table vs_vars_table[] = {
 	{ .ctl_name = 0 }
 };
 
-static ctl_table vs_table[] = {
-	{
-		.procname	= "vs",
-		.mode		= 0555,
-		.child		= vs_vars_table
-	},
-	{ .ctl_name = 0 }
-};
-
-static ctl_table ipvs_ipv4_table[] = {
-	{
-		.ctl_name	= NET_IPV4,
-		.procname	= "ipv4",
-		.mode		= 0555,
-		.child		= vs_table
-	},
-	{ .ctl_name = 0 }
-};
-
-static ctl_table lblcr_root_table[] = {
-	{
-		.ctl_name	= CTL_NET,
-		.procname	= "net",
-		.mode		= 0555,
-		.child		= ipvs_ipv4_table
-	},
-	{ .ctl_name = 0 }
-};
-
 static struct ctl_table_header * sysctl_header;
 
 /*
@@ -771,7 +742,7 @@ static int __init ip_vs_lblcr_init(void)
 	int ret;
 
 	INIT_LIST_HEAD(&ip_vs_lblcr_scheduler.n_list);
-	sysctl_header = register_sysctl_table(lblcr_root_table);
+	sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars_table);
 	ret = register_ip_vs_scheduler(&ip_vs_lblcr_scheduler);
 	if (ret)
 		unregister_sysctl_table(sysctl_header);

net/ipv4/ipvs/ip_vs_sched.c

@@ -24,6 +24,7 @@
 #include <linux/interrupt.h>
 #include <asm/string.h>
 #include <linux/kmod.h>
+#include <linux/sysctl.h>
 
 #include <net/ip_vs.h>