[deliverable/linux.git] / net / sysctl_net.c

/* -*- linux-c -*-
 * sysctl_net.c: sysctl interface to net subsystem.
 *
 * Begun April 1, 1996, Mike Shaver.
 * Added /proc/sys/net directories for each protocol family. [MS]
 *
 * $Log: sysctl_net.c,v $
 * Revision 1.2  1996/05/08  20:24:40  shaver
 * Added bits for NET_BRIDGE and the NET_IPV4_ARP stuff and
 * NET_IPV4_IP_FORWARD.
 *
 *
 */

#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/nsproxy.h>

#include <net/sock.h>

#ifdef CONFIG_INET
#include <net/ip.h>
#endif

#ifdef CONFIG_NET
#include <linux/if_ether.h>
#endif

#ifdef CONFIG_TR
#include <linux/if_tr.h>
#endif

struct ctl_table net_table[] = {
	{
		.ctl_name	= NET_CORE,
		.procname	= "core",
		.mode		= 0555,
		.child		= core_table,
	},
#ifdef CONFIG_INET
	{
		.ctl_name	= NET_IPV4,
		.procname	= "ipv4",
		.mode		= 0555,
		.child		= ipv4_table
	},
#endif
#ifdef CONFIG_TR
	{
		.ctl_name	= NET_TR,
		.procname	= "token-ring",
		.mode		= 0555,
		.child		= tr_table,
	},
#endif
	{ 0 },
};

static struct list_head *
net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces)
{
	return &namespaces->net_ns->sysctl_table_headers;
}

static struct ctl_table_root net_sysctl_root = {
	.lookup = net_ctl_header_lookup,
};

static int sysctl_net_init(struct net *net)
{
	INIT_LIST_HEAD(&net->sysctl_table_headers);
	return 0;
}

static void sysctl_net_exit(struct net *net)
{
	WARN_ON(!list_empty(&net->sysctl_table_headers));
	return;
}

static struct pernet_operations sysctl_pernet_ops = {
	.init = sysctl_net_init,
	.exit = sysctl_net_exit,
};

static __init int sysctl_init(void)
{
	int ret;
	ret = register_pernet_subsys(&sysctl_pernet_ops);
	if (ret)
		goto out;
	register_sysctl_root(&net_sysctl_root);
out:
	return ret;
}
subsys_initcall(sysctl_init);

struct ctl_table_header *register_net_sysctl_table(struct net *net,
	const struct ctl_path *path, struct ctl_table *table)
{
	struct nsproxy namespaces;
	namespaces = *current->nsproxy;
	namespaces.net_ns = net;
	return __register_sysctl_paths(&net_sysctl_root,
					&namespaces, path, table);
}
EXPORT_SYMBOL_GPL(register_net_sysctl_table);

void unregister_net_sysctl_table(struct ctl_table_header *header)
{
	return unregister_sysctl_table(header);
}
EXPORT_SYMBOL_GPL(unregister_net_sysctl_table);
Commit	Line	Data
1da177e4 LT	1	/* -- linux-c --
	2	* sysctl_net.c: sysctl interface to net subsystem.
	3	*
	4	* Begun April 1, 1996, Mike Shaver.
	5	* Added /proc/sys/net directories for each protocol family. [MS]
	6	*
	7	* $Log: sysctl_net.c,v $
	8	* Revision 1.2 1996/05/08 20:24:40 shaver
	9	* Added bits for NET_BRIDGE and the NET_IPV4_ARP stuff and
	10	* NET_IPV4_IP_FORWARD.
	11	*
	12	*
	13	*/
	14
1da177e4 LT	15	#include <linux/mm.h>
1da177e4 LT	16	#include <linux/sysctl.h>
95bdfccb	17	#include <linux/nsproxy.h>
1da177e4	18
496a22b0 RK	19	#include <net/sock.h>
496a22b0 RK	20
1da177e4	21	#ifdef CONFIG_INET
20380731	22	#include <net/ip.h>
1da177e4 LT	23	#endif
1da177e4 LT	24
1da177e4	25	#ifdef CONFIG_NET
20380731	26	#include <linux/if_ether.h>
1da177e4 LT	27	#endif
	28
	29	#ifdef CONFIG_TR
20380731	30	#include <linux/if_tr.h>
1da177e4 LT	31	#endif
	32
	33	struct ctl_table net_table[] = {
	34	{
	35	.ctl_name = NET_CORE,
	36	.procname = "core",
	37	.mode = 0555,
	38	.child = core_table,
	39	},
1da177e4 LT	40	#ifdef CONFIG_INET
	41	{
	42	.ctl_name = NET_IPV4,
	43	.procname = "ipv4",
	44	.mode = 0555,
	45	.child = ipv4_table
	46	},
	47	#endif
	48	#ifdef CONFIG_TR
	49	{
	50	.ctl_name = NET_TR,
	51	.procname = "token-ring",
	52	.mode = 0555,
	53	.child = tr_table,
	54	},
	55	#endif
	56	{ 0 },
	57	};
95bdfccb EB	58
	59	static struct list_head *
	60	net_ctl_header_lookup(struct ctl_table_root root, struct nsproxy namespaces)
	61	{
	62	return &namespaces->net_ns->sysctl_table_headers;
	63	}
	64
	65	static struct ctl_table_root net_sysctl_root = {
	66	.lookup = net_ctl_header_lookup,
	67	};
	68
	69	static int sysctl_net_init(struct net *net)
	70	{
	71	INIT_LIST_HEAD(&net->sysctl_table_headers);
	72	return 0;
	73	}
	74
	75	static void sysctl_net_exit(struct net *net)
	76	{
	77	WARN_ON(!list_empty(&net->sysctl_table_headers));
	78	return;
	79	}
	80
	81	static struct pernet_operations sysctl_pernet_ops = {
	82	.init = sysctl_net_init,
	83	.exit = sysctl_net_exit,
	84	};
	85
	86	static __init int sysctl_init(void)
	87	{
	88	int ret;
	89	ret = register_pernet_subsys(&sysctl_pernet_ops);
	90	if (ret)
	91	goto out;
	92	register_sysctl_root(&net_sysctl_root);
	93	out:
	94	return ret;
	95	}
	96	subsys_initcall(sysctl_init);
	97
	98	struct ctl_table_header register_net_sysctl_table(struct net net,
	99	const struct ctl_path path, struct ctl_table table)
	100	{
	101	struct nsproxy namespaces;
	102	namespaces = *current->nsproxy;
	103	namespaces.net_ns = net;
	104	return __register_sysctl_paths(&net_sysctl_root,
	105	&namespaces, path, table);
	106	}
	107	EXPORT_SYMBOL_GPL(register_net_sysctl_table);
	108
	109	void unregister_net_sysctl_table(struct ctl_table_header *header)
	110	{
	111	return unregister_sysctl_table(header);
	112	}
	113	EXPORT_SYMBOL_GPL(unregister_net_sysctl_table);