[mirror_ubuntu-jammy-kernel.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 <linux-sctp@vger.kernel.org>
 *
 * Written or modified by:
 *    Mingqin Liu           <liuming@us.ibm.com>
 *    Jon Grimm             <jgrimm@us.ibm.com>
 *    Ardelle Fan           <ardelle.fan@intel.com>
 *    Ryan Layer            <rmlayer@us.ibm.com>
 *    Sridhar Samudrala     <sri@us.ibm.com>
 */

#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 int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
				void __user *buffer, size_t *lenp,
				loff_t *ppos);
static int proc_sctp_do_rto_max(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_sctp_do_rto_min,
		.extra1         = &one,
		.extra2         = &init_net.sctp.rto_max
	},
	{
		.procname	= "rto_max",
		.data		= &init_net.sctp.rto_max,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_sctp_do_rto_max,
		.extra1         = &init_net.sctp.rto_min,
		.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;
}

static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
				void __user *buffer, size_t *lenp,
				loff_t *ppos)
{
	struct net *net = current->nsproxy->net_ns;
	int new_value;
	struct ctl_table tbl;
	unsigned int min = *(unsigned int *) ctl->extra1;
	unsigned int max = *(unsigned int *) ctl->extra2;
	int ret;

	memset(&tbl, 0, sizeof(struct ctl_table));
	tbl.maxlen = sizeof(unsigned int);

	if (write)
		tbl.data = &new_value;
	else
		tbl.data = &net->sctp.rto_min;
	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
	if (write) {
		if (ret || new_value > max || new_value < min)
			return -EINVAL;
		net->sctp.rto_min = new_value;
	}
	return ret;
}

static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
				void __user *buffer, size_t *lenp,
				loff_t *ppos)
{
	struct net *net = current->nsproxy->net_ns;
	int new_value;
	struct ctl_table tbl;
	unsigned int min = *(unsigned int *) ctl->extra1;
	unsigned int max = *(unsigned int *) ctl->extra2;
	int ret;

	memset(&tbl, 0, sizeof(struct ctl_table));
	tbl.maxlen = sizeof(unsigned int);

	if (write)
		tbl.data = &new_value;
	else
		tbl.data = &net->sctp.rto_max;
	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
	if (write) {
		if (ret || new_value > max || new_value < min)
			return -EINVAL;
		net->sctp.rto_max = new_value;
	}
	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 <linux-sctp@vger.kernel.org>
1da177e4	29	*
1da177e4 LT	30	* Written or modified by:
	31	* Mingqin Liu <liuming@us.ibm.com>
	32	* Jon Grimm <jgrimm@us.ibm.com>
	33	* Ardelle Fan <ardelle.fan@intel.com>
	34	* Ryan Layer <rmlayer@us.ibm.com>
	35	* Sridhar Samudrala <sri@us.ibm.com>
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
b486b228	59	static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
3c68198e	60	void __user buffer, size_t lenp,
3c68198e	61	loff_t *ppos);
4f3fdf3b	62	static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
	63	void __user buffer, size_t lenp,
	64	loff_t *ppos);
	65	static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
	66	void __user buffer, size_t lenp,
	67	loff_t *ppos);
	68
fe2c6338	69	static struct ctl_table sctp_table[] = {
e1fc3b14 EB	70	{
	71	.procname = "sctp_mem",
	72	.data = &sysctl_sctp_mem,
	73	.maxlen = sizeof(sysctl_sctp_mem),
	74	.mode = 0644,
	75	.proc_handler = proc_doulongvec_minmax
	76	},
	77	{
	78	.procname = "sctp_rmem",
	79	.data = &sysctl_sctp_rmem,
	80	.maxlen = sizeof(sysctl_sctp_rmem),
	81	.mode = 0644,
	82	.proc_handler = proc_dointvec,
	83	},
	84	{
	85	.procname = "sctp_wmem",
	86	.data = &sysctl_sctp_wmem,
	87	.maxlen = sizeof(sysctl_sctp_wmem),
	88	.mode = 0644,
	89	.proc_handler = proc_dointvec,
	90	},
	91
	92	{ /* sentinel */ }
	93	};
	94
fe2c6338	95	static struct ctl_table sctp_net_table[] = {
1da177e4	96	{
1da177e4	97	.procname = "rto_initial",
e1fc3b14	98	.data = &init_net.sctp.rto_initial,
3fd091e7	99	.maxlen = sizeof(unsigned int),
1da177e4	100	.mode = 0644,
6d9f239a	101	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	102	.extra1 = &one,
3fd091e7 VY	103	.extra2 = &timer_max
1da177e4 LT	104	},
1da177e4 LT	105	{
1da177e4	106	.procname = "rto_min",
e1fc3b14	107	.data = &init_net.sctp.rto_min,
3fd091e7	108	.maxlen = sizeof(unsigned int),
1da177e4	109	.mode = 0644,
4f3fdf3b	110	.proc_handler = proc_sctp_do_rto_min,
3fd091e7	111	.extra1 = &one,
4f3fdf3b	112	.extra2 = &init_net.sctp.rto_max
1da177e4 LT	113	},
1da177e4 LT	114	{
1da177e4	115	.procname = "rto_max",
e1fc3b14	116	.data = &init_net.sctp.rto_max,
3fd091e7	117	.maxlen = sizeof(unsigned int),
1da177e4	118	.mode = 0644,
4f3fdf3b	119	.proc_handler = proc_sctp_do_rto_max,
4f3fdf3b	120	.extra1 = &init_net.sctp.rto_min,
3fd091e7	121	.extra2 = &timer_max
1da177e4 LT	122	},
1da177e4 LT	123	{
e1fc3b14 EB	124	.procname = "rto_alpha_exp_divisor",
	125	.data = &init_net.sctp.rto_alpha,
	126	.maxlen = sizeof(int),
	127	.mode = 0444,
	128	.proc_handler = proc_dointvec,
	129	},
	130	{
	131	.procname = "rto_beta_exp_divisor",
	132	.data = &init_net.sctp.rto_beta,
	133	.maxlen = sizeof(int),
	134	.mode = 0444,
	135	.proc_handler = proc_dointvec,
1da177e4 LT	136	},
1da177e4 LT	137	{
1da177e4	138	.procname = "max_burst",
e1fc3b14	139	.data = &init_net.sctp.max_burst,
1da177e4 LT	140	.maxlen = sizeof(int),
1da177e4 LT	141	.mode = 0644,
6d9f239a	142	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	143	.extra1 = &zero,
3fd091e7 VY	144	.extra2 = &int_max
1da177e4 LT	145	},
1da177e4 LT	146	{
e1fc3b14 EB	147	.procname = "cookie_preserve_enable",
e1fc3b14 EB	148	.data = &init_net.sctp.cookie_preserve_enable,
1da177e4 LT	149	.maxlen = sizeof(int),
1da177e4 LT	150	.mode = 0644,
e1fc3b14 EB	151	.proc_handler = proc_dointvec,
e1fc3b14 EB	152	},
3c68198e NH	153	{
	154	.procname = "cookie_hmac_alg",
	155	.maxlen = 8,
	156	.mode = 0644,
	157	.proc_handler = proc_sctp_do_hmac_alg,
	158	},
e1fc3b14 EB	159	{
	160	.procname = "valid_cookie_life",
	161	.data = &init_net.sctp.valid_cookie_life,
	162	.maxlen = sizeof(unsigned int),
	163	.mode = 0644,
6d9f239a	164	.proc_handler = proc_dointvec_minmax,
e1fc3b14 EB	165	.extra1 = &one,
e1fc3b14 EB	166	.extra2 = &timer_max
1da177e4	167	},
4eb701df	168	{
e1fc3b14 EB	169	.procname = "sack_timeout",
e1fc3b14 EB	170	.data = &init_net.sctp.sack_timeout,
4eb701df NH	171	.maxlen = sizeof(int),
4eb701df NH	172	.mode = 0644,
e1fc3b14 EB	173	.proc_handler = proc_dointvec_minmax,
	174	.extra1 = &sack_timer_min,
	175	.extra2 = &sack_timer_max,
4eb701df	176	},
049b3ff5	177	{
e1fc3b14 EB	178	.procname = "hb_interval",
	179	.data = &init_net.sctp.hb_interval,
	180	.maxlen = sizeof(unsigned int),
049b3ff5	181	.mode = 0644,
e1fc3b14 EB	182	.proc_handler = proc_dointvec_minmax,
	183	.extra1 = &one,
	184	.extra2 = &timer_max
049b3ff5	185	},
1da177e4	186	{
e1fc3b14 EB	187	.procname = "association_max_retrans",
e1fc3b14 EB	188	.data = &init_net.sctp.max_retrans_association,
1da177e4 LT	189	.maxlen = sizeof(int),
1da177e4 LT	190	.mode = 0644,
6d9f239a	191	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	192	.extra1 = &one,
3fd091e7 VY	193	.extra2 = &int_max
1da177e4	194	},
5aa93bcf	195	{
e1fc3b14 EB	196	.procname = "path_max_retrans",
e1fc3b14 EB	197	.data = &init_net.sctp.max_retrans_path,
5aa93bcf NH	198	.maxlen = sizeof(int),
	199	.mode = 0644,
	200	.proc_handler = proc_dointvec_minmax,
e1fc3b14	201	.extra1 = &one,
5aa93bcf NH	202	.extra2 = &int_max
5aa93bcf NH	203	},
1da177e4	204	{
1da177e4	205	.procname = "max_init_retransmits",
e1fc3b14	206	.data = &init_net.sctp.max_retrans_init,
1da177e4 LT	207	.maxlen = sizeof(int),
1da177e4 LT	208	.mode = 0644,
6d9f239a	209	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	210	.extra1 = &one,
3fd091e7 VY	211	.extra2 = &int_max
1da177e4 LT	212	},
1da177e4 LT	213	{
e1fc3b14 EB	214	.procname = "pf_retrans",
	215	.data = &init_net.sctp.pf_retrans,
	216	.maxlen = sizeof(int),
1da177e4	217	.mode = 0644,
6d9f239a	218	.proc_handler = proc_dointvec_minmax,
e1fc3b14 EB	219	.extra1 = &zero,
e1fc3b14 EB	220	.extra2 = &int_max
1da177e4 LT	221	},
1da177e4 LT	222	{
e1fc3b14 EB	223	.procname = "sndbuf_policy",
e1fc3b14 EB	224	.data = &init_net.sctp.sndbuf_policy,
8116ffad	225	.maxlen = sizeof(int),
1da177e4	226	.mode = 0644,
6d9f239a	227	.proc_handler = proc_dointvec,
1da177e4 LT	228	},
1da177e4 LT	229	{
e1fc3b14 EB	230	.procname = "rcvbuf_policy",
e1fc3b14 EB	231	.data = &init_net.sctp.rcvbuf_policy,
dd51be0f MH	232	.maxlen = sizeof(int),
	233	.mode = 0644,
	234	.proc_handler = proc_dointvec,
	235	},
	236	{
	237	.procname = "default_auto_asconf",
e1fc3b14	238	.data = &init_net.sctp.default_auto_asconf,
1da177e4 LT	239	.maxlen = sizeof(int),
1da177e4 LT	240	.mode = 0644,
6d9f239a	241	.proc_handler = proc_dointvec,
1da177e4 LT	242	},
1da177e4 LT	243	{
e1fc3b14 EB	244	.procname = "addip_enable",
e1fc3b14 EB	245	.data = &init_net.sctp.addip_enable,
1da177e4 LT	246	.maxlen = sizeof(int),
1da177e4 LT	247	.mode = 0644,
6d9f239a	248	.proc_handler = proc_dointvec,
1da177e4	249	},
2f85a429	250	{
e1fc3b14 EB	251	.procname = "addip_noauth_enable",
e1fc3b14 EB	252	.data = &init_net.sctp.addip_noauth,
d48e074d	253	.maxlen = sizeof(int),
2f85a429	254	.mode = 0644,
6d9f239a	255	.proc_handler = proc_dointvec,
4d93df0a NH	256	},
4d93df0a NH	257	{
e1fc3b14 EB	258	.procname = "prsctp_enable",
e1fc3b14 EB	259	.data = &init_net.sctp.prsctp_enable,
a29a5bd4 VY	260	.maxlen = sizeof(int),
a29a5bd4 VY	261	.mode = 0644,
6d9f239a	262	.proc_handler = proc_dointvec,
a29a5bd4	263	},
73d9c4fd	264	{
e1fc3b14 EB	265	.procname = "auth_enable",
e1fc3b14 EB	266	.data = &init_net.sctp.auth_enable,
73d9c4fd VY	267	.maxlen = sizeof(int),
73d9c4fd VY	268	.mode = 0644,
6d9f239a	269	.proc_handler = proc_dointvec,
73d9c4fd	270	},
72388433	271	{
72388433	272	.procname = "addr_scope_policy",
e1fc3b14	273	.data = &init_net.sctp.scope_policy,
72388433 BD	274	.maxlen = sizeof(int),
72388433 BD	275	.mode = 0644,
6d456111	276	.proc_handler = proc_dointvec_minmax,
72388433 BD	277	.extra1 = &zero,
	278	.extra2 = &addr_scope_max,
	279	},
90f2f531	280	{
90f2f531	281	.procname = "rwnd_update_shift",
e1fc3b14	282	.data = &init_net.sctp.rwnd_upd_shift,
90f2f531 VY	283	.maxlen = sizeof(int),
	284	.mode = 0644,
	285	.proc_handler = &proc_dointvec_minmax,
90f2f531 VY	286	.extra1 = &one,
	287	.extra2 = &rwnd_scale_max,
	288	},
2692ba61 XW	289	{
2692ba61 XW	290	.procname = "max_autoclose",
e1fc3b14	291	.data = &init_net.sctp.max_autoclose,
2692ba61 XW	292	.maxlen = sizeof(unsigned long),
	293	.mode = 0644,
	294	.proc_handler = &proc_doulongvec_minmax,
	295	.extra1 = &max_autoclose_min,
	296	.extra2 = &max_autoclose_max,
	297	},
71acc0dd	298
d7fc02c7	299	{ /* sentinel */ }
1da177e4 LT	300	};
1da177e4 LT	301
b486b228	302	static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
3c68198e NH	303	void __user buffer, size_t lenp,
	304	loff_t *ppos)
	305	{
	306	struct net *net = current->nsproxy->net_ns;
	307	char tmp[8];
fe2c6338	308	struct ctl_table tbl;
3c68198e NH	309	int ret;
	310	int changed = 0;
	311	char *none = "none";
	312
	313	memset(&tbl, 0, sizeof(struct ctl_table));
	314
	315	if (write) {
	316	tbl.data = tmp;
	317	tbl.maxlen = 8;
	318	} else {
	319	tbl.data = net->sctp.sctp_hmac_alg ? : none;
	320	tbl.maxlen = strlen(tbl.data);
	321	}
	322	ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
	323
	324	if (write) {
	325	#ifdef CONFIG_CRYPTO_MD5
	326	if (!strncmp(tmp, "md5", 3)) {
	327	net->sctp.sctp_hmac_alg = "md5";
	328	changed = 1;
	329	}
	330	#endif
	331	#ifdef CONFIG_CRYPTO_SHA1
	332	if (!strncmp(tmp, "sha1", 4)) {
	333	net->sctp.sctp_hmac_alg = "sha1";
	334	changed = 1;
	335	}
	336	#endif
	337	if (!strncmp(tmp, "none", 4)) {
	338	net->sctp.sctp_hmac_alg = NULL;
	339	changed = 1;
	340	}
	341
	342	if (!changed)
	343	ret = -EINVAL;
	344	}
	345
	346	return ret;
	347	}
	348
4f3fdf3b	349	static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
	350	void __user buffer, size_t lenp,
	351	loff_t *ppos)
	352	{
	353	struct net *net = current->nsproxy->net_ns;
	354	int new_value;
	355	struct ctl_table tbl;
	356	unsigned int min = (unsigned int ) ctl->extra1;
	357	unsigned int max = (unsigned int ) ctl->extra2;
	358	int ret;
	359
	360	memset(&tbl, 0, sizeof(struct ctl_table));
	361	tbl.maxlen = sizeof(unsigned int);
	362
	363	if (write)
	364	tbl.data = &new_value;
	365	else
	366	tbl.data = &net->sctp.rto_min;
	367	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
	368	if (write) {
	369	if (ret \|\| new_value > max \|\| new_value < min)
	370	return -EINVAL;
	371	net->sctp.rto_min = new_value;
	372	}
	373	return ret;
	374	}
	375
	376	static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
	377	void __user buffer, size_t lenp,
	378	loff_t *ppos)
	379	{
	380	struct net *net = current->nsproxy->net_ns;
	381	int new_value;
	382	struct ctl_table tbl;
	383	unsigned int min = (unsigned int ) ctl->extra1;
	384	unsigned int max = (unsigned int ) ctl->extra2;
	385	int ret;
	386
	387	memset(&tbl, 0, sizeof(struct ctl_table));
	388	tbl.maxlen = sizeof(unsigned int);
	389
	390	if (write)
	391	tbl.data = &new_value;
	392	else
	393	tbl.data = &net->sctp.rto_max;
	394	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
	395	if (write) {
	396	if (ret \|\| new_value > max \|\| new_value < min)
	397	return -EINVAL;
	398	net->sctp.rto_max = new_value;
	399	}
	400	return ret;
	401	}
	402
ebb7e95d EB	403	int sctp_sysctl_net_register(struct net *net)
	404	{
	405	struct ctl_table *table;
e1fc3b14	406	int i;
ebb7e95d EB	407
	408	table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);
	409	if (!table)
	410	return -ENOMEM;
	411
e1fc3b14 EB	412	for (i = 0; table[i].data; i++)
	413	table[i].data += (char )(&net->sctp) - (char )&init_net.sctp;
	414
ebb7e95d EB	415	net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table);
	416	return 0;
	417	}
	418
	419	void sctp_sysctl_net_unregister(struct net *net)
	420	{
5f19d121 VY	421	struct ctl_table *table;
	422
	423	table = net->sctp.sysctl_header->ctl_table_arg;
ebb7e95d	424	unregister_net_sysctl_table(net->sctp.sysctl_header);
5f19d121	425	kfree(table);
ebb7e95d EB	426	}
ebb7e95d EB	427
1da177e4 LT	428	static struct ctl_table_header * sctp_sysctl_header;
	429
	430	/* Sysctl registration. */
	431	void sctp_sysctl_register(void)
	432	{
ec8f23ce	433	sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table);
1da177e4 LT	434	}
	435
	436	/* Sysctl deregistration. */
	437	void sctp_sysctl_unregister(void)
	438	{
5dd3df10	439	unregister_net_sysctl_table(sctp_sysctl_header);
1da177e4	440	}