net neigh: Decouple per interface neighbour table controls from binary sysctls

Stop computing the number of neighbour table settings we have by
counting the number of binary sysctls.  This behaviour was silly
and meant that we could not add another neighbour table setting
without also adding another binary sysctl.

Don't pass the binary sysctl path for neighour table entries
into neigh_sysctl_register.  These parameters are no longer
used and so are just dead code.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/sysctl.h

@@ -596,7 +596,6 @@ enum {
 	NET_NEIGH_GC_THRESH3=16,
 	NET_NEIGH_RETRANS_TIME_MS=17,
 	NET_NEIGH_REACHABLE_TIME_MS=18,
-	__NET_NEIGH_MAX
 };
 
 /* /proc/sys/net/dccp */

include/net/neighbour.h

@@ -251,7 +251,6 @@ extern void neigh_seq_stop(struct seq_file *, void *);
 
 extern int			neigh_sysctl_register(struct net_device *dev, 
 						      struct neigh_parms *p,
-						      int p_id, int pdev_id,
 						      char *p_name,
 						      proc_handler *proc_handler);
 extern void			neigh_sysctl_unregister(struct neigh_parms *p);

net/core/neighbour.c

@@ -2556,9 +2556,11 @@ EXPORT_SYMBOL(neigh_app_ns);
 
 #ifdef CONFIG_SYSCTL
 
+#define NEIGH_VARS_MAX 19
+
 static struct neigh_sysctl_table {
 	struct ctl_table_header *sysctl_header;
-	struct ctl_table neigh_vars[__NET_NEIGH_MAX];
+	struct ctl_table neigh_vars[NEIGH_VARS_MAX];
 	char *dev_name;
 } neigh_sysctl_template __read_mostly = {
 	.neigh_vars = {
@@ -2675,8 +2677,7 @@ static struct neigh_sysctl_table {
 };
 
 int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p,
-			  int p_id, int pdev_id, char *p_name,
-			  proc_handler *handler)
+			  char *p_name, proc_handler *handler)
 {
 	struct neigh_sysctl_table *t;
 	const char *dev_name_source = NULL;

net/ipv4/arp.c

@@ -1284,8 +1284,7 @@ void __init arp_init(void)
 	dev_add_pack(&arp_packet_type);
 	arp_proc_init();
 #ifdef CONFIG_SYSCTL
-	neigh_sysctl_register(NULL, &arp_tbl.parms, NET_IPV4,
-			      NET_IPV4_NEIGH, "ipv4", NULL);
+	neigh_sysctl_register(NULL, &arp_tbl.parms, "ipv4", NULL);
 #endif
 	register_netdevice_notifier(&arp_netdev_notifier);
 }

net/ipv4/devinet.c

@@ -1487,8 +1487,7 @@ static void __devinet_sysctl_unregister(struct ipv4_devconf *cnf)
 
 static void devinet_sysctl_register(struct in_device *idev)
 {
-	neigh_sysctl_register(idev->dev, idev->arp_parms, NET_IPV4,
-			NET_IPV4_NEIGH, "ipv4", NULL);
+	neigh_sysctl_register(idev->dev, idev->arp_parms, "ipv4", NULL);
 	__devinet_sysctl_register(dev_net(idev->dev), idev->dev->name,
 					&idev->cnf);
 }

net/ipv6/addrconf.c

@@ -4416,8 +4416,7 @@ static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
 
 static void addrconf_sysctl_register(struct inet6_dev *idev)
 {
-	neigh_sysctl_register(idev->dev, idev->nd_parms, NET_IPV6,
-			      NET_IPV6_NEIGH, "ipv6",
+	neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6",
 			      &ndisc_ifinfo_sysctl_change);
 	__addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
 					idev, &idev->cnf);

net/ipv6/ndisc.c

@@ -1820,8 +1820,7 @@ int __init ndisc_init(void)
 	neigh_table_init(&nd_tbl);
 
 #ifdef CONFIG_SYSCTL
-	err = neigh_sysctl_register(NULL, &nd_tbl.parms, NET_IPV6,
-				    NET_IPV6_NEIGH, "ipv6",
+	err = neigh_sysctl_register(NULL, &nd_tbl.parms, "ipv6",
 				    &ndisc_ifinfo_sysctl_change);
 	if (err)
 		goto out_unregister_pernet;