[linux-2.6-block.git] / net / ipv6 / sysctl_net_ipv6.c

/*
 * sysctl_net_ipv6.c: sysctl interface to net IPV6 subsystem.
 *
 * Changes:
 * YOSHIFUJI Hideaki @USAGI:	added icmp sysctl table.
 */

#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/in6.h>
#include <linux/ipv6.h>
#include <net/ndisc.h>
#include <net/ipv6.h>
#include <net/addrconf.h>
#include <net/inet_frag.h>

static ctl_table ipv6_table_template[] = {
	{
		.ctl_name	= NET_IPV6_ROUTE,
		.procname	= "route",
		.maxlen		= 0,
		.mode		= 0555,
		.child		= ipv6_route_table_template
	},
	{
		.ctl_name	= NET_IPV6_ICMP,
		.procname	= "icmp",
		.maxlen		= 0,
		.mode		= 0555,
		.child		= ipv6_icmp_table_template
	},
	{
		.ctl_name	= NET_IPV6_BINDV6ONLY,
		.procname	= "bindv6only",
		.data		= &init_net.ipv6.sysctl.bindv6only,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_IPV6_MLD_MAX_MSF,
		.procname	= "mld_max_msf",
		.data		= &sysctl_mld_max_msf,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{ .ctl_name = 0 }
};

struct ctl_path net_ipv6_ctl_path[] = {
	{ .procname = "net", .ctl_name = CTL_NET, },
	{ .procname = "ipv6", .ctl_name = NET_IPV6, },
	{ },
};
EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);

static int ipv6_sysctl_net_init(struct net *net)
{
	struct ctl_table *ipv6_table;
	struct ctl_table *ipv6_route_table;
	struct ctl_table *ipv6_icmp_table;
	int err;

	err = -ENOMEM;
	ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
			     GFP_KERNEL);
	if (!ipv6_table)
		goto out;

	ipv6_route_table = ipv6_route_sysctl_init(net);
	if (!ipv6_route_table)
		goto out_ipv6_table;

	ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
	if (!ipv6_icmp_table)
		goto out_ipv6_route_table;

	ipv6_route_table[0].data = &net->ipv6.sysctl.flush_delay;
	/* ipv6_route_table[1].data will be handled when we have
	   routes per namespace */
	ipv6_route_table[2].data = &net->ipv6.sysctl.ip6_rt_max_size;
	ipv6_route_table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval;
	ipv6_route_table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout;
	ipv6_route_table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval;
	ipv6_route_table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity;
	ipv6_route_table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires;
	ipv6_route_table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss;
	ipv6_table[0].child = ipv6_route_table;

	ipv6_icmp_table[0].data = &net->ipv6.sysctl.icmpv6_time;
	ipv6_table[1].child = ipv6_icmp_table;

	ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;

	/* We don't want this value to be per namespace, it should be global
	   to all namespaces, so make it read-only when we are not in the
	   init network namespace */
	if (net != &init_net)
		ipv6_table[3].mode = 0444;

	net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
							   ipv6_table);
	if (!net->ipv6.sysctl.table)
		goto out_ipv6_icmp_table;

	err = 0;
out:
	return err;

out_ipv6_icmp_table:
	kfree(ipv6_icmp_table);
out_ipv6_route_table:
	kfree(ipv6_route_table);
out_ipv6_table:
	kfree(ipv6_table);
	goto out;
}

static void ipv6_sysctl_net_exit(struct net *net)
{
	struct ctl_table *ipv6_table;
	struct ctl_table *ipv6_route_table;
	struct ctl_table *ipv6_icmp_table;

	ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
	ipv6_route_table = ipv6_table[0].child;
	ipv6_icmp_table = ipv6_table[1].child;

	unregister_net_sysctl_table(net->ipv6.sysctl.table);

	kfree(ipv6_table);
	kfree(ipv6_route_table);
	kfree(ipv6_icmp_table);
}

static struct pernet_operations ipv6_sysctl_net_ops = {
	.init = ipv6_sysctl_net_init,
	.exit = ipv6_sysctl_net_exit,
};

int ipv6_sysctl_register(void)
{
	return register_pernet_subsys(&ipv6_sysctl_net_ops);
}

void ipv6_sysctl_unregister(void)
{
	unregister_pernet_subsys(&ipv6_sysctl_net_ops);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* sysctl_net_ipv6.c: sysctl interface to net IPV6 subsystem.
	3	*
	4	* Changes:
	5	* YOSHIFUJI Hideaki @USAGI: added icmp sysctl table.
	6	*/
	7
	8	#include <linux/mm.h>
	9	#include <linux/sysctl.h>
1da177e4 LT	10	#include <linux/in6.h>
	11	#include <linux/ipv6.h>
	12	#include <net/ndisc.h>
	13	#include <net/ipv6.h>
	14	#include <net/addrconf.h>
04128f23	15	#include <net/inet_frag.h>
1da177e4	16
760f2d01	17	static ctl_table ipv6_table_template[] = {
1da177e4 LT	18	{
	19	.ctl_name = NET_IPV6_ROUTE,
	20	.procname = "route",
	21	.maxlen = 0,
	22	.mode = 0555,
760f2d01	23	.child = ipv6_route_table_template
1da177e4 LT	24	},
	25	{
	26	.ctl_name = NET_IPV6_ICMP,
	27	.procname = "icmp",
	28	.maxlen = 0,
	29	.mode = 0555,
760f2d01	30	.child = ipv6_icmp_table_template
1da177e4 LT	31	},
	32	{
	33	.ctl_name = NET_IPV6_BINDV6ONLY,
	34	.procname = "bindv6only",
99bc9c4e	35	.data = &init_net.ipv6.sysctl.bindv6only,
1da177e4 LT	36	.maxlen = sizeof(int),
	37	.mode = 0644,
	38	.proc_handler = &proc_dointvec
	39	},
1da177e4 LT	40	{
	41	.ctl_name = NET_IPV6_MLD_MAX_MSF,
	42	.procname = "mld_max_msf",
	43	.data = &sysctl_mld_max_msf,
	44	.maxlen = sizeof(int),
	45	.mode = 0644,
	46	.proc_handler = &proc_dointvec
	47	},
	48	{ .ctl_name = 0 }
	49	};
	50
3d7cc2ba	51	struct ctl_path net_ipv6_ctl_path[] = {
4d43b78a PE	52	{ .procname = "net", .ctl_name = CTL_NET, },
	53	{ .procname = "ipv6", .ctl_name = NET_IPV6, },
	54	{ },
1da177e4	55	};
3d7cc2ba	56	EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
1da177e4	57
89918fc2	58	static int ipv6_sysctl_net_init(struct net *net)
1da177e4	59	{
760f2d01 DL	60	struct ctl_table *ipv6_table;
	61	struct ctl_table *ipv6_route_table;
	62	struct ctl_table *ipv6_icmp_table;
	63	int err;
	64
	65	err = -ENOMEM;
	66	ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
	67	GFP_KERNEL);
	68	if (!ipv6_table)
	69	goto out;
	70
	71	ipv6_route_table = ipv6_route_sysctl_init(net);
	72	if (!ipv6_route_table)
	73	goto out_ipv6_table;
	74
	75	ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
	76	if (!ipv6_icmp_table)
	77	goto out_ipv6_route_table;
	78
4990509f DL	79	ipv6_route_table[0].data = &net->ipv6.sysctl.flush_delay;
	80	/* ipv6_route_table[1].data will be handled when we have
	81	routes per namespace */
	82	ipv6_route_table[2].data = &net->ipv6.sysctl.ip6_rt_max_size;
	83	ipv6_route_table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval;
	84	ipv6_route_table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout;
	85	ipv6_route_table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval;
	86	ipv6_route_table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity;
	87	ipv6_route_table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires;
	88	ipv6_route_table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss;
760f2d01	89	ipv6_table[0].child = ipv6_route_table;
4990509f	90
41a76906	91	ipv6_icmp_table[0].data = &net->ipv6.sysctl.icmpv6_time;
760f2d01 DL	92	ipv6_table[1].child = ipv6_icmp_table;
760f2d01 DL	93
99bc9c4e DL	94	ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
99bc9c4e DL	95
7c76509d DL	96	/* We don't want this value to be per namespace, it should be global
	97	to all namespaces, so make it read-only when we are not in the
	98	init network namespace */
	99	if (net != &init_net)
8d8354d2	100	ipv6_table[3].mode = 0444;
7c76509d	101
760f2d01 DL	102	net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
760f2d01 DL	103	ipv6_table);
760f2d01 DL	104	if (!net->ipv6.sysctl.table)
	105	goto out_ipv6_icmp_table;
	106
	107	err = 0;
	108	out:
	109	return err;
291480c0	110
760f2d01 DL	111	out_ipv6_icmp_table:
	112	kfree(ipv6_icmp_table);
	113	out_ipv6_route_table:
	114	kfree(ipv6_route_table);
	115	out_ipv6_table:
	116	kfree(ipv6_table);
	117	goto out;
1da177e4 LT	118	}
1da177e4 LT	119
89918fc2 DL	120	static void ipv6_sysctl_net_exit(struct net *net)
89918fc2 DL	121	{
760f2d01 DL	122	struct ctl_table *ipv6_table;
	123	struct ctl_table *ipv6_route_table;
	124	struct ctl_table *ipv6_icmp_table;
	125
	126	ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
	127	ipv6_route_table = ipv6_table[0].child;
	128	ipv6_icmp_table = ipv6_table[1].child;
	129
	130	unregister_net_sysctl_table(net->ipv6.sysctl.table);
	131
	132	kfree(ipv6_table);
	133	kfree(ipv6_route_table);
	134	kfree(ipv6_icmp_table);
89918fc2 DL	135	}
	136
	137	static struct pernet_operations ipv6_sysctl_net_ops = {
	138	.init = ipv6_sysctl_net_init,
	139	.exit = ipv6_sysctl_net_exit,
	140	};
	141
	142	int ipv6_sysctl_register(void)
	143	{
	144	return register_pernet_subsys(&ipv6_sysctl_net_ops);
	145	}
	146
1da177e4 LT	147	void ipv6_sysctl_unregister(void)
1da177e4 LT	148	{
89918fc2	149	unregister_pernet_subsys(&ipv6_sysctl_net_ops);
1da177e4	150	}