[net-next-2.6.git] / net / core / sysctl_net_core.c

/* -*- linux-c -*-
 * sysctl_net_core.c: sysctl interface to net core subsystem.
 *
 * Begun April 1, 1996, Mike Shaver.
 * Added /proc/sys/net/core directory entry (empty =) ). [MS]
 */

#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/module.h>
#include <linux/socket.h>
#include <linux/netdevice.h>
#include <linux/init.h>
#include <net/ip.h>
#include <net/sock.h>

static struct ctl_table net_core_table[] = {
#ifdef CONFIG_NET
	{
		.ctl_name	= NET_CORE_WMEM_MAX,
		.procname	= "wmem_max",
		.data		= &sysctl_wmem_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.ctl_name	= NET_CORE_RMEM_MAX,
		.procname	= "rmem_max",
		.data		= &sysctl_rmem_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.ctl_name	= NET_CORE_WMEM_DEFAULT,
		.procname	= "wmem_default",
		.data		= &sysctl_wmem_default,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.ctl_name	= NET_CORE_RMEM_DEFAULT,
		.procname	= "rmem_default",
		.data		= &sysctl_rmem_default,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.ctl_name	= NET_CORE_DEV_WEIGHT,
		.procname	= "dev_weight",
		.data		= &weight_p,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.ctl_name	= NET_CORE_MAX_BACKLOG,
		.procname	= "netdev_max_backlog",
		.data		= &netdev_max_backlog,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.ctl_name	= NET_CORE_MSG_COST,
		.procname	= "message_cost",
		.data		= &net_ratelimit_state.interval,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_jiffies,
		.strategy	= sysctl_jiffies,
	},
	{
		.ctl_name	= NET_CORE_MSG_BURST,
		.procname	= "message_burst",
		.data		= &net_ratelimit_state.burst,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.ctl_name	= NET_CORE_OPTMEM_MAX,
		.procname	= "optmem_max",
		.data		= &sysctl_optmem_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
#endif /* CONFIG_NET */
	{
		.ctl_name	= NET_CORE_BUDGET,
		.procname	= "netdev_budget",
		.data		= &netdev_budget,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.ctl_name	= NET_CORE_WARNINGS,
		.procname	= "warnings",
		.data		= &net_msg_warn,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{ .ctl_name = 0 }
};

static struct ctl_table netns_core_table[] = {
	{
		.ctl_name	= NET_CORE_SOMAXCONN,
		.procname	= "somaxconn",
		.data		= &init_net.core.sysctl_somaxconn,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{ .ctl_name = 0 }
};

__net_initdata struct ctl_path net_core_path[] = {
	{ .procname = "net", .ctl_name = CTL_NET, },
	{ .procname = "core", .ctl_name = NET_CORE, },
	{ },
};

static __net_init int sysctl_core_net_init(struct net *net)
{
	struct ctl_table *tbl;

	net->core.sysctl_somaxconn = SOMAXCONN;

	tbl = netns_core_table;
	if (net != &init_net) {
		tbl = kmemdup(tbl, sizeof(netns_core_table), GFP_KERNEL);
		if (tbl == NULL)
			goto err_dup;

		tbl[0].data = &net->core.sysctl_somaxconn;
	}

	net->core.sysctl_hdr = register_net_sysctl_table(net,
			net_core_path, tbl);
	if (net->core.sysctl_hdr == NULL)
		goto err_reg;

	return 0;

err_reg:
	if (tbl != netns_core_table)
		kfree(tbl);
err_dup:
	return -ENOMEM;
}

static __net_exit void sysctl_core_net_exit(struct net *net)
{
	struct ctl_table *tbl;

	tbl = net->core.sysctl_hdr->ctl_table_arg;
	unregister_net_sysctl_table(net->core.sysctl_hdr);
	BUG_ON(tbl == netns_core_table);
	kfree(tbl);
}

static __net_initdata struct pernet_operations sysctl_core_ops = {
	.init = sysctl_core_net_init,
	.exit = sysctl_core_net_exit,
};

static __init int sysctl_core_init(void)
{
	static struct ctl_table empty[1];

	register_sysctl_paths(net_core_path, empty);
	register_net_sysctl_rotable(net_core_path, net_core_table);
	return register_pernet_subsys(&sysctl_core_ops);
}

fs_initcall(sysctl_core_init);
Commit	Line	Data
1da177e4 LT	1	/* -- linux-c --
	2	* sysctl_net_core.c: sysctl interface to net core subsystem.
	3	*
	4	* Begun April 1, 1996, Mike Shaver.
	5	* Added /proc/sys/net/core directory entry (empty =) ). [MS]
	6	*/
	7
	8	#include <linux/mm.h>
	9	#include <linux/sysctl.h>
1da177e4	10	#include <linux/module.h>
20380731	11	#include <linux/socket.h>
a37ae408	12	#include <linux/netdevice.h>
33eb9cfc	13	#include <linux/init.h>
63d819ca	14	#include <net/ip.h>
20380731	15	#include <net/sock.h>
1da177e4	16
33eb9cfc	17	static struct ctl_table net_core_table[] = {
1da177e4 LT	18	#ifdef CONFIG_NET
	19	{
	20	.ctl_name = NET_CORE_WMEM_MAX,
	21	.procname = "wmem_max",
	22	.data = &sysctl_wmem_max,
	23	.maxlen = sizeof(int),
	24	.mode = 0644,
6d9f239a	25	.proc_handler = proc_dointvec
1da177e4 LT	26	},
	27	{
	28	.ctl_name = NET_CORE_RMEM_MAX,
	29	.procname = "rmem_max",
	30	.data = &sysctl_rmem_max,
	31	.maxlen = sizeof(int),
	32	.mode = 0644,
6d9f239a	33	.proc_handler = proc_dointvec
1da177e4 LT	34	},
	35	{
	36	.ctl_name = NET_CORE_WMEM_DEFAULT,
	37	.procname = "wmem_default",
	38	.data = &sysctl_wmem_default,
	39	.maxlen = sizeof(int),
	40	.mode = 0644,
6d9f239a	41	.proc_handler = proc_dointvec
1da177e4 LT	42	},
	43	{
	44	.ctl_name = NET_CORE_RMEM_DEFAULT,
	45	.procname = "rmem_default",
	46	.data = &sysctl_rmem_default,
	47	.maxlen = sizeof(int),
	48	.mode = 0644,
6d9f239a	49	.proc_handler = proc_dointvec
1da177e4 LT	50	},
	51	{
	52	.ctl_name = NET_CORE_DEV_WEIGHT,
	53	.procname = "dev_weight",
	54	.data = &weight_p,
	55	.maxlen = sizeof(int),
	56	.mode = 0644,
6d9f239a	57	.proc_handler = proc_dointvec
1da177e4 LT	58	},
	59	{
	60	.ctl_name = NET_CORE_MAX_BACKLOG,
	61	.procname = "netdev_max_backlog",
	62	.data = &netdev_max_backlog,
	63	.maxlen = sizeof(int),
	64	.mode = 0644,
6d9f239a	65	.proc_handler = proc_dointvec
1da177e4	66	},
1da177e4 LT	67	{
	68	.ctl_name = NET_CORE_MSG_COST,
	69	.procname = "message_cost",
717115e1	70	.data = &net_ratelimit_state.interval,
1da177e4 LT	71	.maxlen = sizeof(int),
1da177e4 LT	72	.mode = 0644,
6d9f239a AD	73	.proc_handler = proc_dointvec_jiffies,
6d9f239a AD	74	.strategy = sysctl_jiffies,
1da177e4 LT	75	},
	76	{
	77	.ctl_name = NET_CORE_MSG_BURST,
	78	.procname = "message_burst",
717115e1	79	.data = &net_ratelimit_state.burst,
1da177e4 LT	80	.maxlen = sizeof(int),
1da177e4 LT	81	.mode = 0644,
6d9f239a	82	.proc_handler = proc_dointvec,
1da177e4 LT	83	},
	84	{
	85	.ctl_name = NET_CORE_OPTMEM_MAX,
	86	.procname = "optmem_max",
	87	.data = &sysctl_optmem_max,
	88	.maxlen = sizeof(int),
	89	.mode = 0644,
6d9f239a	90	.proc_handler = proc_dointvec
1da177e4	91	},
1da177e4	92	#endif /* CONFIG_NET */
51b0bded SH	93	{
	94	.ctl_name = NET_CORE_BUDGET,
	95	.procname = "netdev_budget",
	96	.data = &netdev_budget,
	97	.maxlen = sizeof(int),
	98	.mode = 0644,
6d9f239a	99	.proc_handler = proc_dointvec
51b0bded	100	},
a2a316fd SH	101	{
	102	.ctl_name = NET_CORE_WARNINGS,
	103	.procname = "warnings",
	104	.data = &net_msg_warn,
	105	.maxlen = sizeof(int),
	106	.mode = 0644,
6d9f239a	107	.proc_handler = proc_dointvec
a2a316fd	108	},
1da177e4 LT	109	{ .ctl_name = 0 }
1da177e4 LT	110	};
33eb9cfc	111
d5a4502e PE	112	static struct ctl_table netns_core_table[] = {
	113	{
	114	.ctl_name = NET_CORE_SOMAXCONN,
	115	.procname = "somaxconn",
	116	.data = &init_net.core.sysctl_somaxconn,
	117	.maxlen = sizeof(int),
	118	.mode = 0644,
6d9f239a	119	.proc_handler = proc_dointvec
d5a4502e PE	120	},
	121	{ .ctl_name = 0 }
	122	};
	123
b27aeadb	124	__net_initdata struct ctl_path net_core_path[] = {
33eb9cfc PE	125	{ .procname = "net", .ctl_name = CTL_NET, },
	126	{ .procname = "core", .ctl_name = NET_CORE, },
	127	{ },
	128	};
	129
024626e3	130	static __net_init int sysctl_core_net_init(struct net *net)
33eb9cfc	131	{
d5a4502e	132	struct ctl_table *tbl;
024626e3	133
8efa6e93	134	net->core.sysctl_somaxconn = SOMAXCONN;
b8e1f9b5	135
d5a4502e	136	tbl = netns_core_table;
024626e3	137	if (net != &init_net) {
d5a4502e	138	tbl = kmemdup(tbl, sizeof(netns_core_table), GFP_KERNEL);
024626e3 PE	139	if (tbl == NULL)
	140	goto err_dup;
	141
d5a4502e	142	tbl[0].data = &net->core.sysctl_somaxconn;
024626e3 PE	143	}
024626e3 PE	144
8efa6e93	145	net->core.sysctl_hdr = register_net_sysctl_table(net,
024626e3	146	net_core_path, tbl);
8efa6e93	147	if (net->core.sysctl_hdr == NULL)
024626e3	148	goto err_reg;
33eb9cfc	149
024626e3 PE	150	return 0;
	151
	152	err_reg:
d5a4502e	153	if (tbl != netns_core_table)
024626e3 PE	154	kfree(tbl);
	155	err_dup:
	156	return -ENOMEM;
	157	}
	158
	159	static __net_exit void sysctl_core_net_exit(struct net *net)
	160	{
	161	struct ctl_table *tbl;
	162
8efa6e93 PE	163	tbl = net->core.sysctl_hdr->ctl_table_arg;
8efa6e93 PE	164	unregister_net_sysctl_table(net->core.sysctl_hdr);
d5a4502e	165	BUG_ON(tbl == netns_core_table);
024626e3 PE	166	kfree(tbl);
	167	}
	168
	169	static __net_initdata struct pernet_operations sysctl_core_ops = {
	170	.init = sysctl_core_net_init,
	171	.exit = sysctl_core_net_exit,
	172	};
	173
	174	static __init int sysctl_core_init(void)
	175	{
b27aeadb AD	176	static struct ctl_table empty[1];
	177
	178	register_sysctl_paths(net_core_path, empty);
d5a4502e	179	register_net_sysctl_rotable(net_core_path, net_core_table);
024626e3	180	return register_pernet_subsys(&sysctl_core_ops);
33eb9cfc PE	181	}
33eb9cfc PE	182
b27aeadb	183	fs_initcall(sysctl_core_init);