[linux.git] / net / sctp / sysctl.c

/* SCTP kernel implementation
 * (C) Copyright IBM Corp. 2002, 2004
 * Copyright (c) 2002 Intel Corp.
 *
 * This file is part of the SCTP kernel implementation
 *
 * Sysctl related interfaces for SCTP.
 *
 * This SCTP implementation is free software;
 * you can redistribute it and/or modify it under the terms of
 * the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This SCTP implementation is distributed in the hope that it
 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
 *                 ************************
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU CC; see the file COPYING.  If not, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Please send any bug reports or fixes you make to the
 * email address(es):
 *    lksctp developers <[email protected]>
 *
 * Written or modified by:
 *    Mingqin Liu           <[email protected]>
 *    Jon Grimm             <[email protected]>
 *    Ardelle Fan           <[email protected]>
 *    Ryan Layer            <[email protected]>
 *    Sridhar Samudrala     <[email protected]>
 */

#include <net/sctp/structs.h>
#include <net/sctp/sctp.h>
#include <linux/sysctl.h>

static int zero = 0;
static int one = 1;
static int timer_max = 86400000; /* ms in one day */
static int int_max = INT_MAX;
static int sack_timer_min = 1;
static int sack_timer_max = 500;
static int addr_scope_max = 3; /* check sctp_scope_policy_t in include/net/sctp/constants.h for max entries */
static int rwnd_scale_max = 16;
static unsigned long max_autoclose_min = 0;
static unsigned long max_autoclose_max =
	(MAX_SCHEDULE_TIMEOUT / HZ > UINT_MAX)
	? UINT_MAX : MAX_SCHEDULE_TIMEOUT / HZ;

extern long sysctl_sctp_mem[3];
extern int sysctl_sctp_rmem[3];
extern int sysctl_sctp_wmem[3];

static int proc_sctp_do_hmac_alg(struct ctl_table *ctl,
				int write,
				void __user *buffer, size_t *lenp,

				loff_t *ppos);
static struct ctl_table sctp_table[] = {
	{
		.procname	= "sctp_mem",
		.data		= &sysctl_sctp_mem,
		.maxlen		= sizeof(sysctl_sctp_mem),
		.mode		= 0644,
		.proc_handler	= proc_doulongvec_minmax
	},
	{
		.procname	= "sctp_rmem",
		.data		= &sysctl_sctp_rmem,
		.maxlen		= sizeof(sysctl_sctp_rmem),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "sctp_wmem",
		.data		= &sysctl_sctp_wmem,
		.maxlen		= sizeof(sysctl_sctp_wmem),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},

	{ /* sentinel */ }
};

static struct ctl_table sctp_net_table[] = {
	{
		.procname	= "rto_initial",
		.data		= &init_net.sctp.rto_initial,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1         = &one,
		.extra2         = &timer_max
	},
	{
		.procname	= "rto_min",
		.data		= &init_net.sctp.rto_min,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1         = &one,
		.extra2         = &timer_max
	},
	{
		.procname	= "rto_max",
		.data		= &init_net.sctp.rto_max,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1         = &one,
		.extra2         = &timer_max
	},
	{
		.procname	= "rto_alpha_exp_divisor",
		.data		= &init_net.sctp.rto_alpha,
		.maxlen		= sizeof(int),
		.mode		= 0444,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "rto_beta_exp_divisor",
		.data		= &init_net.sctp.rto_beta,
		.maxlen		= sizeof(int),
		.mode		= 0444,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "max_burst",
		.data		= &init_net.sctp.max_burst,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= &zero,
		.extra2		= &int_max
	},
	{
		.procname	= "cookie_preserve_enable",
		.data		= &init_net.sctp.cookie_preserve_enable,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "cookie_hmac_alg",
		.maxlen		= 8,
		.mode		= 0644,
		.proc_handler	= proc_sctp_do_hmac_alg,
	},
	{
		.procname	= "valid_cookie_life",
		.data		= &init_net.sctp.valid_cookie_life,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1         = &one,
		.extra2         = &timer_max
	},
	{
		.procname	= "sack_timeout",
		.data		= &init_net.sctp.sack_timeout,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1         = &sack_timer_min,
		.extra2         = &sack_timer_max,
	},
	{
		.procname	= "hb_interval",
		.data		= &init_net.sctp.hb_interval,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1         = &one,
		.extra2         = &timer_max
	},
	{
		.procname	= "association_max_retrans",
		.data		= &init_net.sctp.max_retrans_association,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= &one,
		.extra2		= &int_max
	},
	{
		.procname	= "path_max_retrans",
		.data		= &init_net.sctp.max_retrans_path,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= &one,
		.extra2		= &int_max
	},
	{
		.procname	= "max_init_retransmits",
		.data		= &init_net.sctp.max_retrans_init,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= &one,
		.extra2		= &int_max
	},
	{
		.procname	= "pf_retrans",
		.data		= &init_net.sctp.pf_retrans,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= &zero,
		.extra2		= &int_max
	},
	{
		.procname	= "sndbuf_policy",
		.data		= &init_net.sctp.sndbuf_policy,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "rcvbuf_policy",
		.data		= &init_net.sctp.rcvbuf_policy,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "default_auto_asconf",
		.data		= &init_net.sctp.default_auto_asconf,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "addip_enable",
		.data		= &init_net.sctp.addip_enable,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "addip_noauth_enable",
		.data		= &init_net.sctp.addip_noauth,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "prsctp_enable",
		.data		= &init_net.sctp.prsctp_enable,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "auth_enable",
		.data		= &init_net.sctp.auth_enable,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "addr_scope_policy",
		.data		= &init_net.sctp.scope_policy,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= &zero,
		.extra2		= &addr_scope_max,
	},
	{
		.procname	= "rwnd_update_shift",
		.data		= &init_net.sctp.rwnd_upd_shift,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.extra1		= &one,
		.extra2		= &rwnd_scale_max,
	},
	{
		.procname	= "max_autoclose",
		.data		= &init_net.sctp.max_autoclose,
		.maxlen		= sizeof(unsigned long),
		.mode		= 0644,
		.proc_handler	= &proc_doulongvec_minmax,
		.extra1		= &max_autoclose_min,
		.extra2		= &max_autoclose_max,
	},

	{ /* sentinel */ }
};

static int proc_sctp_do_hmac_alg(struct ctl_table *ctl,
				int write,
				void __user *buffer, size_t *lenp,
				loff_t *ppos)
{
	struct net *net = current->nsproxy->net_ns;
	char tmp[8];
	struct ctl_table tbl;
	int ret;
	int changed = 0;
	char *none = "none";

	memset(&tbl, 0, sizeof(struct ctl_table));

	if (write) {
		tbl.data = tmp;
		tbl.maxlen = 8;
	} else {
		tbl.data = net->sctp.sctp_hmac_alg ? : none;
		tbl.maxlen = strlen(tbl.data);
	}
		ret = proc_dostring(&tbl, write, buffer, lenp, ppos);

	if (write) {
#ifdef CONFIG_CRYPTO_MD5
		if (!strncmp(tmp, "md5", 3)) {
			net->sctp.sctp_hmac_alg = "md5";
			changed = 1;
		}
#endif
#ifdef CONFIG_CRYPTO_SHA1
		if (!strncmp(tmp, "sha1", 4)) {
			net->sctp.sctp_hmac_alg = "sha1";
			changed = 1;
		}
#endif
		if (!strncmp(tmp, "none", 4)) {
			net->sctp.sctp_hmac_alg = NULL;
			changed = 1;
		}

		if (!changed)
			ret = -EINVAL;
	}

	return ret;
}

int sctp_sysctl_net_register(struct net *net)
{
	struct ctl_table *table;
	int i;

	table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);
	if (!table)
		return -ENOMEM;

	for (i = 0; table[i].data; i++)
		table[i].data += (char *)(&net->sctp) - (char *)&init_net.sctp;

	net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table);
	return 0;
}

void sctp_sysctl_net_unregister(struct net *net)
{
	struct ctl_table *table;

	table = net->sctp.sysctl_header->ctl_table_arg;
	unregister_net_sysctl_table(net->sctp.sysctl_header);
	kfree(table);
}

static struct ctl_table_header * sctp_sysctl_header;

/* Sysctl registration.  */
void sctp_sysctl_register(void)
{
	sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table);
}

/* Sysctl deregistration.  */
void sctp_sysctl_unregister(void)
{
	unregister_net_sysctl_table(sctp_sysctl_header);
}
Commit	Line	Data
60c778b2	1	/* SCTP kernel implementation
1da177e4 LT	2	* (C) Copyright IBM Corp. 2002, 2004
	3	* Copyright (c) 2002 Intel Corp.
	4	*
60c778b2	5	* This file is part of the SCTP kernel implementation
1da177e4 LT	6	*
	7	* Sysctl related interfaces for SCTP.
	8	*
60c778b2	9	* This SCTP implementation is free software;
1da177e4 LT	10	* you can redistribute it and/or modify it under the terms of
	11	* the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2, or (at your option)
	13	* any later version.
	14	*
60c778b2	15	* This SCTP implementation is distributed in the hope that it
1da177e4 LT	16	* will be useful, but WITHOUT ANY WARRANTY; without even the implied
	17	* ************************
	18	* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	19	* See the GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with GNU CC; see the file COPYING. If not, write to
	23	* the Free Software Foundation, 59 Temple Place - Suite 330,
	24	* Boston, MA 02111-1307, USA.
	25	*
	26	* Please send any bug reports or fixes you make to the
	27	* email address(es):
91705c61	28	* lksctp developers <[email protected]>
1da177e4	29	*
1da177e4 LT	30	* Written or modified by:
	31	* Mingqin Liu <[email protected]>
	32	* Jon Grimm <[email protected]>
	33	* Ardelle Fan <[email protected]>
	34	* Ryan Layer <[email protected]>
	35	* Sridhar Samudrala <[email protected]>
1da177e4 LT	36	*/
	37
	38	#include <net/sctp/structs.h>
8c5955d8	39	#include <net/sctp/sctp.h>
1da177e4 LT	40	#include <linux/sysctl.h>
1da177e4 LT	41
3fd091e7 VY	42	static int zero = 0;
	43	static int one = 1;
	44	static int timer_max = 86400000; /* ms in one day */
	45	static int int_max = INT_MAX;
d48e074d JMG	46	static int sack_timer_min = 1;
d48e074d JMG	47	static int sack_timer_max = 500;
72388433	48	static int addr_scope_max = 3; /* check sctp_scope_policy_t in include/net/sctp/constants.h for max entries */
90f2f531	49	static int rwnd_scale_max = 16;
2692ba61 XW	50	static unsigned long max_autoclose_min = 0;
	51	static unsigned long max_autoclose_max =
	52	(MAX_SCHEDULE_TIMEOUT / HZ > UINT_MAX)
	53	? UINT_MAX : MAX_SCHEDULE_TIMEOUT / HZ;
1da177e4	54
8d987e5c	55	extern long sysctl_sctp_mem[3];
007e3936 VY	56	extern int sysctl_sctp_rmem[3];
007e3936 VY	57	extern int sysctl_sctp_wmem[3];
4d93df0a	58
fe2c6338	59	static int proc_sctp_do_hmac_alg(struct ctl_table *ctl,
3c68198e NH	60	int write,
	61	void __user buffer, size_t lenp,
	62
	63	loff_t *ppos);
fe2c6338	64	static struct ctl_table sctp_table[] = {
e1fc3b14 EB	65	{
	66	.procname = "sctp_mem",
	67	.data = &sysctl_sctp_mem,
	68	.maxlen = sizeof(sysctl_sctp_mem),
	69	.mode = 0644,
	70	.proc_handler = proc_doulongvec_minmax
	71	},
	72	{
	73	.procname = "sctp_rmem",
	74	.data = &sysctl_sctp_rmem,
	75	.maxlen = sizeof(sysctl_sctp_rmem),
	76	.mode = 0644,
	77	.proc_handler = proc_dointvec,
	78	},
	79	{
	80	.procname = "sctp_wmem",
	81	.data = &sysctl_sctp_wmem,
	82	.maxlen = sizeof(sysctl_sctp_wmem),
	83	.mode = 0644,
	84	.proc_handler = proc_dointvec,
	85	},
	86
	87	{ /* sentinel */ }
	88	};
	89
fe2c6338	90	static struct ctl_table sctp_net_table[] = {
1da177e4	91	{
1da177e4	92	.procname = "rto_initial",
e1fc3b14	93	.data = &init_net.sctp.rto_initial,
3fd091e7	94	.maxlen = sizeof(unsigned int),
1da177e4	95	.mode = 0644,
6d9f239a	96	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	97	.extra1 = &one,
3fd091e7 VY	98	.extra2 = &timer_max
1da177e4 LT	99	},
1da177e4 LT	100	{
1da177e4	101	.procname = "rto_min",
e1fc3b14	102	.data = &init_net.sctp.rto_min,
3fd091e7	103	.maxlen = sizeof(unsigned int),
1da177e4	104	.mode = 0644,
6d9f239a	105	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	106	.extra1 = &one,
3fd091e7 VY	107	.extra2 = &timer_max
1da177e4 LT	108	},
1da177e4 LT	109	{
1da177e4	110	.procname = "rto_max",
e1fc3b14	111	.data = &init_net.sctp.rto_max,
3fd091e7	112	.maxlen = sizeof(unsigned int),
1da177e4	113	.mode = 0644,
6d9f239a	114	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	115	.extra1 = &one,
3fd091e7 VY	116	.extra2 = &timer_max
1da177e4 LT	117	},
1da177e4 LT	118	{
e1fc3b14 EB	119	.procname = "rto_alpha_exp_divisor",
	120	.data = &init_net.sctp.rto_alpha,
	121	.maxlen = sizeof(int),
	122	.mode = 0444,
	123	.proc_handler = proc_dointvec,
	124	},
	125	{
	126	.procname = "rto_beta_exp_divisor",
	127	.data = &init_net.sctp.rto_beta,
	128	.maxlen = sizeof(int),
	129	.mode = 0444,
	130	.proc_handler = proc_dointvec,
1da177e4 LT	131	},
1da177e4 LT	132	{
1da177e4	133	.procname = "max_burst",
e1fc3b14	134	.data = &init_net.sctp.max_burst,
1da177e4 LT	135	.maxlen = sizeof(int),
1da177e4 LT	136	.mode = 0644,
6d9f239a	137	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	138	.extra1 = &zero,
3fd091e7 VY	139	.extra2 = &int_max
1da177e4 LT	140	},
1da177e4 LT	141	{
e1fc3b14 EB	142	.procname = "cookie_preserve_enable",
e1fc3b14 EB	143	.data = &init_net.sctp.cookie_preserve_enable,
1da177e4 LT	144	.maxlen = sizeof(int),
1da177e4 LT	145	.mode = 0644,
e1fc3b14 EB	146	.proc_handler = proc_dointvec,
e1fc3b14 EB	147	},
3c68198e NH	148	{
	149	.procname = "cookie_hmac_alg",
	150	.maxlen = 8,
	151	.mode = 0644,
	152	.proc_handler = proc_sctp_do_hmac_alg,
	153	},
e1fc3b14 EB	154	{
	155	.procname = "valid_cookie_life",
	156	.data = &init_net.sctp.valid_cookie_life,
	157	.maxlen = sizeof(unsigned int),
	158	.mode = 0644,
6d9f239a	159	.proc_handler = proc_dointvec_minmax,
e1fc3b14 EB	160	.extra1 = &one,
e1fc3b14 EB	161	.extra2 = &timer_max
1da177e4	162	},
4eb701df	163	{
e1fc3b14 EB	164	.procname = "sack_timeout",
e1fc3b14 EB	165	.data = &init_net.sctp.sack_timeout,
4eb701df NH	166	.maxlen = sizeof(int),
4eb701df NH	167	.mode = 0644,
e1fc3b14 EB	168	.proc_handler = proc_dointvec_minmax,
	169	.extra1 = &sack_timer_min,
	170	.extra2 = &sack_timer_max,
4eb701df	171	},
049b3ff5	172	{
e1fc3b14 EB	173	.procname = "hb_interval",
	174	.data = &init_net.sctp.hb_interval,
	175	.maxlen = sizeof(unsigned int),
049b3ff5	176	.mode = 0644,
e1fc3b14 EB	177	.proc_handler = proc_dointvec_minmax,
	178	.extra1 = &one,
	179	.extra2 = &timer_max
049b3ff5	180	},
1da177e4	181	{
e1fc3b14 EB	182	.procname = "association_max_retrans",
e1fc3b14 EB	183	.data = &init_net.sctp.max_retrans_association,
1da177e4 LT	184	.maxlen = sizeof(int),
1da177e4 LT	185	.mode = 0644,
6d9f239a	186	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	187	.extra1 = &one,
3fd091e7 VY	188	.extra2 = &int_max
1da177e4	189	},
5aa93bcf	190	{
e1fc3b14 EB	191	.procname = "path_max_retrans",
e1fc3b14 EB	192	.data = &init_net.sctp.max_retrans_path,
5aa93bcf NH	193	.maxlen = sizeof(int),
	194	.mode = 0644,
	195	.proc_handler = proc_dointvec_minmax,
e1fc3b14	196	.extra1 = &one,
5aa93bcf NH	197	.extra2 = &int_max
5aa93bcf NH	198	},
1da177e4	199	{
1da177e4	200	.procname = "max_init_retransmits",
e1fc3b14	201	.data = &init_net.sctp.max_retrans_init,
1da177e4 LT	202	.maxlen = sizeof(int),
1da177e4 LT	203	.mode = 0644,
6d9f239a	204	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	205	.extra1 = &one,
3fd091e7 VY	206	.extra2 = &int_max
1da177e4 LT	207	},
1da177e4 LT	208	{
e1fc3b14 EB	209	.procname = "pf_retrans",
	210	.data = &init_net.sctp.pf_retrans,
	211	.maxlen = sizeof(int),
1da177e4	212	.mode = 0644,
6d9f239a	213	.proc_handler = proc_dointvec_minmax,
e1fc3b14 EB	214	.extra1 = &zero,
e1fc3b14 EB	215	.extra2 = &int_max
1da177e4 LT	216	},
1da177e4 LT	217	{
e1fc3b14 EB	218	.procname = "sndbuf_policy",
e1fc3b14 EB	219	.data = &init_net.sctp.sndbuf_policy,
8116ffad	220	.maxlen = sizeof(int),
1da177e4	221	.mode = 0644,
6d9f239a	222	.proc_handler = proc_dointvec,
1da177e4 LT	223	},
1da177e4 LT	224	{
e1fc3b14 EB	225	.procname = "rcvbuf_policy",
e1fc3b14 EB	226	.data = &init_net.sctp.rcvbuf_policy,
dd51be0f MH	227	.maxlen = sizeof(int),
	228	.mode = 0644,
	229	.proc_handler = proc_dointvec,
	230	},
	231	{
	232	.procname = "default_auto_asconf",
e1fc3b14	233	.data = &init_net.sctp.default_auto_asconf,
1da177e4 LT	234	.maxlen = sizeof(int),
1da177e4 LT	235	.mode = 0644,
6d9f239a	236	.proc_handler = proc_dointvec,
1da177e4 LT	237	},
1da177e4 LT	238	{
e1fc3b14 EB	239	.procname = "addip_enable",
e1fc3b14 EB	240	.data = &init_net.sctp.addip_enable,
1da177e4 LT	241	.maxlen = sizeof(int),
1da177e4 LT	242	.mode = 0644,
6d9f239a	243	.proc_handler = proc_dointvec,
1da177e4	244	},
2f85a429	245	{
e1fc3b14 EB	246	.procname = "addip_noauth_enable",
e1fc3b14 EB	247	.data = &init_net.sctp.addip_noauth,
d48e074d	248	.maxlen = sizeof(int),
2f85a429	249	.mode = 0644,
6d9f239a	250	.proc_handler = proc_dointvec,
4d93df0a NH	251	},
4d93df0a NH	252	{
e1fc3b14 EB	253	.procname = "prsctp_enable",
e1fc3b14 EB	254	.data = &init_net.sctp.prsctp_enable,
a29a5bd4 VY	255	.maxlen = sizeof(int),
a29a5bd4 VY	256	.mode = 0644,
6d9f239a	257	.proc_handler = proc_dointvec,
a29a5bd4	258	},
73d9c4fd	259	{
e1fc3b14 EB	260	.procname = "auth_enable",
e1fc3b14 EB	261	.data = &init_net.sctp.auth_enable,
73d9c4fd VY	262	.maxlen = sizeof(int),
73d9c4fd VY	263	.mode = 0644,
6d9f239a	264	.proc_handler = proc_dointvec,
73d9c4fd	265	},
72388433	266	{
72388433	267	.procname = "addr_scope_policy",
e1fc3b14	268	.data = &init_net.sctp.scope_policy,
72388433 BD	269	.maxlen = sizeof(int),
72388433 BD	270	.mode = 0644,
6d456111	271	.proc_handler = proc_dointvec_minmax,
72388433 BD	272	.extra1 = &zero,
	273	.extra2 = &addr_scope_max,
	274	},
90f2f531	275	{
90f2f531	276	.procname = "rwnd_update_shift",
e1fc3b14	277	.data = &init_net.sctp.rwnd_upd_shift,
90f2f531 VY	278	.maxlen = sizeof(int),
	279	.mode = 0644,
	280	.proc_handler = &proc_dointvec_minmax,
90f2f531 VY	281	.extra1 = &one,
	282	.extra2 = &rwnd_scale_max,
	283	},
2692ba61 XW	284	{
2692ba61 XW	285	.procname = "max_autoclose",
e1fc3b14	286	.data = &init_net.sctp.max_autoclose,
2692ba61 XW	287	.maxlen = sizeof(unsigned long),
	288	.mode = 0644,
	289	.proc_handler = &proc_doulongvec_minmax,
	290	.extra1 = &max_autoclose_min,
	291	.extra2 = &max_autoclose_max,
	292	},
71acc0dd	293
d7fc02c7	294	{ /* sentinel */ }
1da177e4 LT	295	};
1da177e4 LT	296
fe2c6338	297	static int proc_sctp_do_hmac_alg(struct ctl_table *ctl,
3c68198e NH	298	int write,
	299	void __user buffer, size_t lenp,
	300	loff_t *ppos)
	301	{
	302	struct net *net = current->nsproxy->net_ns;
	303	char tmp[8];
fe2c6338	304	struct ctl_table tbl;
3c68198e NH	305	int ret;
	306	int changed = 0;
	307	char *none = "none";
	308
	309	memset(&tbl, 0, sizeof(struct ctl_table));
	310
	311	if (write) {
	312	tbl.data = tmp;
	313	tbl.maxlen = 8;
	314	} else {
	315	tbl.data = net->sctp.sctp_hmac_alg ? : none;
	316	tbl.maxlen = strlen(tbl.data);
	317	}
	318	ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
	319
	320	if (write) {
	321	#ifdef CONFIG_CRYPTO_MD5
	322	if (!strncmp(tmp, "md5", 3)) {
	323	net->sctp.sctp_hmac_alg = "md5";
	324	changed = 1;
	325	}
	326	#endif
	327	#ifdef CONFIG_CRYPTO_SHA1
	328	if (!strncmp(tmp, "sha1", 4)) {
	329	net->sctp.sctp_hmac_alg = "sha1";
	330	changed = 1;
	331	}
	332	#endif
	333	if (!strncmp(tmp, "none", 4)) {
	334	net->sctp.sctp_hmac_alg = NULL;
	335	changed = 1;
	336	}
	337
	338	if (!changed)
	339	ret = -EINVAL;
	340	}
	341
	342	return ret;
	343	}
	344
ebb7e95d EB	345	int sctp_sysctl_net_register(struct net *net)
	346	{
	347	struct ctl_table *table;
e1fc3b14	348	int i;
ebb7e95d EB	349
	350	table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);
	351	if (!table)
	352	return -ENOMEM;
	353
e1fc3b14 EB	354	for (i = 0; table[i].data; i++)
	355	table[i].data += (char )(&net->sctp) - (char )&init_net.sctp;
	356
ebb7e95d EB	357	net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table);
	358	return 0;
	359	}
	360
	361	void sctp_sysctl_net_unregister(struct net *net)
	362	{
5f19d121 VY	363	struct ctl_table *table;
	364
	365	table = net->sctp.sysctl_header->ctl_table_arg;
ebb7e95d	366	unregister_net_sysctl_table(net->sctp.sysctl_header);
5f19d121	367	kfree(table);
ebb7e95d EB	368	}
ebb7e95d EB	369
1da177e4 LT	370	static struct ctl_table_header * sctp_sysctl_header;
	371
	372	/* Sysctl registration. */
	373	void sctp_sysctl_register(void)
	374	{
ec8f23ce	375	sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table);
1da177e4 LT	376	}
	377
	378	/* Sysctl deregistration. */
	379	void sctp_sysctl_unregister(void)
	380	{
5dd3df10	381	unregister_net_sysctl_table(sctp_sysctl_header);
1da177e4	382	}