[mirror_ubuntu-artful-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, see
 * <http://www.gnu.org/licenses/>.
 *
 * 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>
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#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 int rto_alpha_min = 0;
static int rto_beta_min = 0;
static int rto_alpha_max = 1000;
static int rto_beta_max = 1000;

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;

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 int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
				   void __user *buffer, size_t *lenp,
				   loff_t *ppos);
static int proc_sctp_do_auth(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		= 0644,
		.proc_handler	= proc_sctp_do_alpha_beta,
		.extra1		= &rto_alpha_min,
		.extra2		= &rto_alpha_max,
	},
	{
		.procname	= "rto_beta_exp_divisor",
		.data		= &init_net.sctp.rto_beta,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_sctp_do_alpha_beta,
		.extra1		= &rto_beta_min,
		.extra2		= &rto_beta_max,
	},
	{
		.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",
		.data		= &init_net.sctp.sctp_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	= "reconf_enable",
		.data		= &init_net.sctp.reconf_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_sctp_do_auth,
	},
	{
		.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,
	},
	{
		.procname	= "pf_enable",
		.data		= &init_net.sctp.pf_enable,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},

	{ /* 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;
	struct ctl_table tbl;
	bool changed = false;
	char *none = "none";
	char tmp[8] = {0};
	int ret;

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

	if (write) {
		tbl.data = tmp;
		tbl.maxlen = sizeof(tmp);
	} else {
		tbl.data = net->sctp.sctp_hmac_alg ? : none;
		tbl.maxlen = strlen(tbl.data);
	}

	ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
	if (write && ret == 0) {
#ifdef CONFIG_CRYPTO_MD5
		if (!strncmp(tmp, "md5", 3)) {
			net->sctp.sctp_hmac_alg = "md5";
			changed = true;
		}
#endif
#ifdef CONFIG_CRYPTO_SHA1
		if (!strncmp(tmp, "sha1", 4)) {
			net->sctp.sctp_hmac_alg = "sha1";
			changed = true;
		}
#endif
		if (!strncmp(tmp, "none", 4)) {
			net->sctp.sctp_hmac_alg = NULL;
			changed = true;
		}
		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;
	unsigned int min = *(unsigned int *) ctl->extra1;
	unsigned int max = *(unsigned int *) ctl->extra2;
	struct ctl_table tbl;
	int ret, new_value;

	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 && ret == 0) {
		if (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;
	unsigned int min = *(unsigned int *) ctl->extra1;
	unsigned int max = *(unsigned int *) ctl->extra2;
	struct ctl_table tbl;
	int ret, new_value;

	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 && ret == 0) {
		if (new_value > max || new_value < min)
			return -EINVAL;

		net->sctp.rto_max = new_value;
	}

	return ret;
}

static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
				   void __user *buffer, size_t *lenp,
				   loff_t *ppos)
{
	if (write)
		pr_warn_once("Changing rto_alpha or rto_beta may lead to "
			     "suboptimal rtt/srtt estimations!\n");

	return proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
}

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

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

	if (write)
		tbl.data = &new_value;
	else
		tbl.data = &net->sctp.auth_enable;

	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
	if (write && ret == 0) {
		struct sock *sk = net->sctp.ctl_sock;

		net->sctp.auth_enable = new_value;
		/* Update the value in the control socket */
		lock_sock(sk);
		sctp_sk(sk)->ep->auth_enable = new_value;
		release_sock(sk);
	}

	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);
	if (net->sctp.sysctl_header == NULL) {
		kfree(table);
		return -ENOMEM;
	}
	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
4b2f13a2 JK	22	* along with GNU CC; see the file COPYING. If not, see
4b2f13a2 JK	23	* <http://www.gnu.org/licenses/>.
1da177e4 LT	24	*
	25	* Please send any bug reports or fixes you make to the
	26	* email address(es):
91705c61	27	* lksctp developers <linux-sctp@vger.kernel.org>
1da177e4	28	*
1da177e4 LT	29	* Written or modified by:
	30	* Mingqin Liu <liuming@us.ibm.com>
	31	* Jon Grimm <jgrimm@us.ibm.com>
	32	* Ardelle Fan <ardelle.fan@intel.com>
	33	* Ryan Layer <rmlayer@us.ibm.com>
	34	* Sridhar Samudrala <sri@us.ibm.com>
1da177e4 LT	35	*/
1da177e4 LT	36
b58537a1 DB	37	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
b58537a1 DB	38
1da177e4	39	#include <net/sctp/structs.h>
8c5955d8	40	#include <net/sctp/sctp.h>
1da177e4 LT	41	#include <linux/sysctl.h>
1da177e4 LT	42
3fd091e7 VY	43	static int zero = 0;
	44	static int one = 1;
	45	static int timer_max = 86400000; /* ms in one day */
	46	static int int_max = INT_MAX;
d48e074d JMG	47	static int sack_timer_min = 1;
d48e074d JMG	48	static int sack_timer_max = 500;
72388433	49	static int addr_scope_max = 3; /* check sctp_scope_policy_t in include/net/sctp/constants.h for max entries */
90f2f531	50	static int rwnd_scale_max = 16;
b58537a1 DB	51	static int rto_alpha_min = 0;
	52	static int rto_beta_min = 0;
	53	static int rto_alpha_max = 1000;
	54	static int rto_beta_max = 1000;
	55
2692ba61 XW	56	static unsigned long max_autoclose_min = 0;
	57	static unsigned long max_autoclose_max =
	58	(MAX_SCHEDULE_TIMEOUT / HZ > UINT_MAX)
	59	? UINT_MAX : MAX_SCHEDULE_TIMEOUT / HZ;
1da177e4	60
b486b228	61	static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
3c68198e	62	void __user buffer, size_t lenp,
3c68198e	63	loff_t *ppos);
4f3fdf3b	64	static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
	65	void __user buffer, size_t lenp,
	66	loff_t *ppos);
	67	static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
3c68198e	68	void __user buffer, size_t lenp,
3c68198e	69	loff_t *ppos);
b58537a1 DB	70	static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
	71	void __user buffer, size_t lenp,
	72	loff_t *ppos);
b14878cc VY	73	static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
	74	void __user buffer, size_t lenp,
	75	loff_t *ppos);
4f3fdf3b	76
fe2c6338	77	static struct ctl_table sctp_table[] = {
e1fc3b14 EB	78	{
	79	.procname = "sctp_mem",
	80	.data = &sysctl_sctp_mem,
	81	.maxlen = sizeof(sysctl_sctp_mem),
	82	.mode = 0644,
	83	.proc_handler = proc_doulongvec_minmax
	84	},
	85	{
	86	.procname = "sctp_rmem",
	87	.data = &sysctl_sctp_rmem,
	88	.maxlen = sizeof(sysctl_sctp_rmem),
	89	.mode = 0644,
	90	.proc_handler = proc_dointvec,
	91	},
	92	{
	93	.procname = "sctp_wmem",
	94	.data = &sysctl_sctp_wmem,
	95	.maxlen = sizeof(sysctl_sctp_wmem),
	96	.mode = 0644,
	97	.proc_handler = proc_dointvec,
	98	},
	99
	100	{ /* sentinel */ }
	101	};
	102
fe2c6338	103	static struct ctl_table sctp_net_table[] = {
1da177e4	104	{
1da177e4	105	.procname = "rto_initial",
e1fc3b14	106	.data = &init_net.sctp.rto_initial,
3fd091e7	107	.maxlen = sizeof(unsigned int),
1da177e4	108	.mode = 0644,
6d9f239a	109	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	110	.extra1 = &one,
3fd091e7 VY	111	.extra2 = &timer_max
1da177e4 LT	112	},
1da177e4 LT	113	{
1da177e4	114	.procname = "rto_min",
e1fc3b14	115	.data = &init_net.sctp.rto_min,
3fd091e7	116	.maxlen = sizeof(unsigned int),
1da177e4	117	.mode = 0644,
4f3fdf3b	118	.proc_handler = proc_sctp_do_rto_min,
3fd091e7	119	.extra1 = &one,
4f3fdf3b	120	.extra2 = &init_net.sctp.rto_max
1da177e4 LT	121	},
1da177e4 LT	122	{
1da177e4	123	.procname = "rto_max",
e1fc3b14	124	.data = &init_net.sctp.rto_max,
3fd091e7	125	.maxlen = sizeof(unsigned int),
1da177e4	126	.mode = 0644,
4f3fdf3b	127	.proc_handler = proc_sctp_do_rto_max,
4f3fdf3b	128	.extra1 = &init_net.sctp.rto_min,
3fd091e7	129	.extra2 = &timer_max
1da177e4 LT	130	},
1da177e4 LT	131	{
e1fc3b14 EB	132	.procname = "rto_alpha_exp_divisor",
	133	.data = &init_net.sctp.rto_alpha,
	134	.maxlen = sizeof(int),
b58537a1 DB	135	.mode = 0644,
	136	.proc_handler = proc_sctp_do_alpha_beta,
	137	.extra1 = &rto_alpha_min,
	138	.extra2 = &rto_alpha_max,
e1fc3b14 EB	139	},
	140	{
	141	.procname = "rto_beta_exp_divisor",
	142	.data = &init_net.sctp.rto_beta,
	143	.maxlen = sizeof(int),
b58537a1 DB	144	.mode = 0644,
	145	.proc_handler = proc_sctp_do_alpha_beta,
	146	.extra1 = &rto_beta_min,
	147	.extra2 = &rto_beta_max,
1da177e4 LT	148	},
1da177e4 LT	149	{
1da177e4	150	.procname = "max_burst",
e1fc3b14	151	.data = &init_net.sctp.max_burst,
1da177e4 LT	152	.maxlen = sizeof(int),
1da177e4 LT	153	.mode = 0644,
6d9f239a	154	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	155	.extra1 = &zero,
3fd091e7 VY	156	.extra2 = &int_max
1da177e4 LT	157	},
1da177e4 LT	158	{
e1fc3b14 EB	159	.procname = "cookie_preserve_enable",
e1fc3b14 EB	160	.data = &init_net.sctp.cookie_preserve_enable,
1da177e4 LT	161	.maxlen = sizeof(int),
1da177e4 LT	162	.mode = 0644,
e1fc3b14 EB	163	.proc_handler = proc_dointvec,
e1fc3b14 EB	164	},
3c68198e NH	165	{
3c68198e NH	166	.procname = "cookie_hmac_alg",
22a1f514	167	.data = &init_net.sctp.sctp_hmac_alg,
3c68198e NH	168	.maxlen = 8,
	169	.mode = 0644,
	170	.proc_handler = proc_sctp_do_hmac_alg,
	171	},
e1fc3b14 EB	172	{
	173	.procname = "valid_cookie_life",
	174	.data = &init_net.sctp.valid_cookie_life,
	175	.maxlen = sizeof(unsigned int),
	176	.mode = 0644,
6d9f239a	177	.proc_handler = proc_dointvec_minmax,
e1fc3b14 EB	178	.extra1 = &one,
e1fc3b14 EB	179	.extra2 = &timer_max
1da177e4	180	},
4eb701df	181	{
e1fc3b14 EB	182	.procname = "sack_timeout",
e1fc3b14 EB	183	.data = &init_net.sctp.sack_timeout,
4eb701df NH	184	.maxlen = sizeof(int),
4eb701df NH	185	.mode = 0644,
e1fc3b14 EB	186	.proc_handler = proc_dointvec_minmax,
	187	.extra1 = &sack_timer_min,
	188	.extra2 = &sack_timer_max,
4eb701df	189	},
049b3ff5	190	{
e1fc3b14 EB	191	.procname = "hb_interval",
	192	.data = &init_net.sctp.hb_interval,
	193	.maxlen = sizeof(unsigned int),
049b3ff5	194	.mode = 0644,
e1fc3b14 EB	195	.proc_handler = proc_dointvec_minmax,
	196	.extra1 = &one,
	197	.extra2 = &timer_max
049b3ff5	198	},
1da177e4	199	{
e1fc3b14 EB	200	.procname = "association_max_retrans",
e1fc3b14 EB	201	.data = &init_net.sctp.max_retrans_association,
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	207	},
5aa93bcf	208	{
e1fc3b14 EB	209	.procname = "path_max_retrans",
e1fc3b14 EB	210	.data = &init_net.sctp.max_retrans_path,
5aa93bcf NH	211	.maxlen = sizeof(int),
	212	.mode = 0644,
	213	.proc_handler = proc_dointvec_minmax,
e1fc3b14	214	.extra1 = &one,
5aa93bcf NH	215	.extra2 = &int_max
5aa93bcf NH	216	},
1da177e4	217	{
1da177e4	218	.procname = "max_init_retransmits",
e1fc3b14	219	.data = &init_net.sctp.max_retrans_init,
1da177e4 LT	220	.maxlen = sizeof(int),
1da177e4 LT	221	.mode = 0644,
6d9f239a	222	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	223	.extra1 = &one,
3fd091e7 VY	224	.extra2 = &int_max
1da177e4 LT	225	},
1da177e4 LT	226	{
e1fc3b14 EB	227	.procname = "pf_retrans",
	228	.data = &init_net.sctp.pf_retrans,
	229	.maxlen = sizeof(int),
1da177e4	230	.mode = 0644,
6d9f239a	231	.proc_handler = proc_dointvec_minmax,
e1fc3b14 EB	232	.extra1 = &zero,
e1fc3b14 EB	233	.extra2 = &int_max
1da177e4 LT	234	},
1da177e4 LT	235	{
e1fc3b14 EB	236	.procname = "sndbuf_policy",
e1fc3b14 EB	237	.data = &init_net.sctp.sndbuf_policy,
8116ffad	238	.maxlen = sizeof(int),
1da177e4	239	.mode = 0644,
6d9f239a	240	.proc_handler = proc_dointvec,
1da177e4 LT	241	},
1da177e4 LT	242	{
e1fc3b14 EB	243	.procname = "rcvbuf_policy",
e1fc3b14 EB	244	.data = &init_net.sctp.rcvbuf_policy,
dd51be0f MH	245	.maxlen = sizeof(int),
	246	.mode = 0644,
	247	.proc_handler = proc_dointvec,
	248	},
	249	{
	250	.procname = "default_auto_asconf",
e1fc3b14	251	.data = &init_net.sctp.default_auto_asconf,
1da177e4 LT	252	.maxlen = sizeof(int),
1da177e4 LT	253	.mode = 0644,
6d9f239a	254	.proc_handler = proc_dointvec,
1da177e4 LT	255	},
1da177e4 LT	256	{
e1fc3b14 EB	257	.procname = "addip_enable",
e1fc3b14 EB	258	.data = &init_net.sctp.addip_enable,
1da177e4 LT	259	.maxlen = sizeof(int),
1da177e4 LT	260	.mode = 0644,
6d9f239a	261	.proc_handler = proc_dointvec,
1da177e4	262	},
2f85a429	263	{
e1fc3b14 EB	264	.procname = "addip_noauth_enable",
e1fc3b14 EB	265	.data = &init_net.sctp.addip_noauth,
d48e074d	266	.maxlen = sizeof(int),
2f85a429	267	.mode = 0644,
6d9f239a	268	.proc_handler = proc_dointvec,
4d93df0a NH	269	},
4d93df0a NH	270	{
e1fc3b14 EB	271	.procname = "prsctp_enable",
e1fc3b14 EB	272	.data = &init_net.sctp.prsctp_enable,
a29a5bd4 VY	273	.maxlen = sizeof(int),
a29a5bd4 VY	274	.mode = 0644,
6d9f239a	275	.proc_handler = proc_dointvec,
a29a5bd4	276	},
c0d8bab6 XL	277	{
	278	.procname = "reconf_enable",
	279	.data = &init_net.sctp.reconf_enable,
	280	.maxlen = sizeof(int),
	281	.mode = 0644,
	282	.proc_handler = proc_dointvec,
	283	},
73d9c4fd	284	{
e1fc3b14 EB	285	.procname = "auth_enable",
e1fc3b14 EB	286	.data = &init_net.sctp.auth_enable,
73d9c4fd VY	287	.maxlen = sizeof(int),
73d9c4fd VY	288	.mode = 0644,
b14878cc	289	.proc_handler = proc_sctp_do_auth,
73d9c4fd	290	},
72388433	291	{
72388433	292	.procname = "addr_scope_policy",
e1fc3b14	293	.data = &init_net.sctp.scope_policy,
72388433 BD	294	.maxlen = sizeof(int),
72388433 BD	295	.mode = 0644,
6d456111	296	.proc_handler = proc_dointvec_minmax,
72388433 BD	297	.extra1 = &zero,
	298	.extra2 = &addr_scope_max,
	299	},
90f2f531	300	{
90f2f531	301	.procname = "rwnd_update_shift",
e1fc3b14	302	.data = &init_net.sctp.rwnd_upd_shift,
90f2f531 VY	303	.maxlen = sizeof(int),
	304	.mode = 0644,
	305	.proc_handler = &proc_dointvec_minmax,
90f2f531 VY	306	.extra1 = &one,
	307	.extra2 = &rwnd_scale_max,
	308	},
2692ba61 XW	309	{
2692ba61 XW	310	.procname = "max_autoclose",
e1fc3b14	311	.data = &init_net.sctp.max_autoclose,
2692ba61 XW	312	.maxlen = sizeof(unsigned long),
	313	.mode = 0644,
	314	.proc_handler = &proc_doulongvec_minmax,
	315	.extra1 = &max_autoclose_min,
	316	.extra2 = &max_autoclose_max,
	317	},
566178f8 ZY	318	{
	319	.procname = "pf_enable",
	320	.data = &init_net.sctp.pf_enable,
	321	.maxlen = sizeof(int),
	322	.mode = 0644,
	323	.proc_handler = proc_dointvec,
	324	},
71acc0dd	325
d7fc02c7	326	{ /* sentinel */ }
1da177e4 LT	327	};
1da177e4 LT	328
b486b228	329	static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
3c68198e NH	330	void __user buffer, size_t lenp,
	331	loff_t *ppos)
	332	{
	333	struct net *net = current->nsproxy->net_ns;
fe2c6338	334	struct ctl_table tbl;
ff5e92c1	335	bool changed = false;
3c68198e	336	char *none = "none";
320f1a4a	337	char tmp[8] = {0};
ff5e92c1	338	int ret;
3c68198e NH	339
	340	memset(&tbl, 0, sizeof(struct ctl_table));
	341
	342	if (write) {
	343	tbl.data = tmp;
ff5e92c1	344	tbl.maxlen = sizeof(tmp);
3c68198e NH	345	} else {
	346	tbl.data = net->sctp.sctp_hmac_alg ? : none;
	347	tbl.maxlen = strlen(tbl.data);
	348	}
3c68198e	349
ff5e92c1 DB	350	ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
ff5e92c1 DB	351	if (write && ret == 0) {
3c68198e NH	352	#ifdef CONFIG_CRYPTO_MD5
	353	if (!strncmp(tmp, "md5", 3)) {
	354	net->sctp.sctp_hmac_alg = "md5";
ff5e92c1	355	changed = true;
3c68198e NH	356	}
	357	#endif
	358	#ifdef CONFIG_CRYPTO_SHA1
	359	if (!strncmp(tmp, "sha1", 4)) {
	360	net->sctp.sctp_hmac_alg = "sha1";
ff5e92c1	361	changed = true;
3c68198e NH	362	}
	363	#endif
	364	if (!strncmp(tmp, "none", 4)) {
	365	net->sctp.sctp_hmac_alg = NULL;
ff5e92c1	366	changed = true;
3c68198e	367	}
3c68198e NH	368	if (!changed)
	369	ret = -EINVAL;
	370	}
	371
	372	return ret;
	373	}
	374
4f3fdf3b	375	static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
	376	void __user buffer, size_t lenp,
	377	loff_t *ppos)
	378	{
	379	struct net *net = current->nsproxy->net_ns;
4f3fdf3b	380	unsigned int min = (unsigned int ) ctl->extra1;
4f3fdf3b	381	unsigned int max = (unsigned int ) ctl->extra2;
ff5e92c1 DB	382	struct ctl_table tbl;
ff5e92c1 DB	383	int ret, new_value;
4f3fdf3b	384
	385	memset(&tbl, 0, sizeof(struct ctl_table));
	386	tbl.maxlen = sizeof(unsigned int);
	387
	388	if (write)
	389	tbl.data = &new_value;
	390	else
	391	tbl.data = &net->sctp.rto_min;
ff5e92c1	392
4f3fdf3b	393	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
ff5e92c1 DB	394	if (write && ret == 0) {
ff5e92c1 DB	395	if (new_value > max \|\| new_value < min)
4f3fdf3b	396	return -EINVAL;
ff5e92c1	397
4f3fdf3b	398	net->sctp.rto_min = new_value;
4f3fdf3b	399	}
ff5e92c1	400
4f3fdf3b	401	return ret;
	402	}
	403
	404	static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
	405	void __user buffer, size_t lenp,
	406	loff_t *ppos)
	407	{
	408	struct net *net = current->nsproxy->net_ns;
4f3fdf3b	409	unsigned int min = (unsigned int ) ctl->extra1;
4f3fdf3b	410	unsigned int max = (unsigned int ) ctl->extra2;
ff5e92c1 DB	411	struct ctl_table tbl;
ff5e92c1 DB	412	int ret, new_value;
4f3fdf3b	413
	414	memset(&tbl, 0, sizeof(struct ctl_table));
	415	tbl.maxlen = sizeof(unsigned int);
	416
	417	if (write)
	418	tbl.data = &new_value;
	419	else
	420	tbl.data = &net->sctp.rto_max;
ff5e92c1	421
4f3fdf3b	422	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
ff5e92c1 DB	423	if (write && ret == 0) {
ff5e92c1 DB	424	if (new_value > max \|\| new_value < min)
4f3fdf3b	425	return -EINVAL;
ff5e92c1	426
4f3fdf3b	427	net->sctp.rto_max = new_value;
4f3fdf3b	428	}
ff5e92c1	429
4f3fdf3b	430	return ret;
	431	}
	432
b58537a1 DB	433	static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
	434	void __user buffer, size_t lenp,
	435	loff_t *ppos)
	436	{
eaea2da7 DB	437	if (write)
	438	pr_warn_once("Changing rto_alpha or rto_beta may lead to "
	439	"suboptimal rtt/srtt estimations!\n");
b58537a1 DB	440
	441	return proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
	442	}
	443
b14878cc VY	444	static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
	445	void __user buffer, size_t lenp,
	446	loff_t *ppos)
	447	{
	448	struct net *net = current->nsproxy->net_ns;
	449	struct ctl_table tbl;
	450	int new_value, ret;
	451
	452	memset(&tbl, 0, sizeof(struct ctl_table));
	453	tbl.maxlen = sizeof(unsigned int);
	454
	455	if (write)
	456	tbl.data = &new_value;
	457	else
	458	tbl.data = &net->sctp.auth_enable;
	459
	460	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
24599e61	461	if (write && ret == 0) {
b14878cc VY	462	struct sock *sk = net->sctp.ctl_sock;
	463
	464	net->sctp.auth_enable = new_value;
	465	/* Update the value in the control socket */
	466	lock_sock(sk);
	467	sctp_sk(sk)->ep->auth_enable = new_value;
	468	release_sock(sk);
	469	}
	470
	471	return ret;
	472	}
	473
ebb7e95d EB	474	int sctp_sysctl_net_register(struct net *net)
ebb7e95d EB	475	{
eb9f3705	476	struct ctl_table *table;
eb9f3705	477	int i;
ebb7e95d	478
eb9f3705	479	table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);
	480	if (!table)
	481	return -ENOMEM;
ebb7e95d	482
eb9f3705	483	for (i = 0; table[i].data; i++)
eb9f3705	484	table[i].data += (char )(&net->sctp) - (char )&init_net.sctp;
e1fc3b14	485
ebb7e95d	486	net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table);
f66138c8	487	if (net->sctp.sysctl_header == NULL) {
	488	kfree(table);
	489	return -ENOMEM;
	490	}
ebb7e95d EB	491	return 0;
	492	}
	493
	494	void sctp_sysctl_net_unregister(struct net *net)
	495	{
5f19d121 VY	496	struct ctl_table *table;
	497
	498	table = net->sctp.sysctl_header->ctl_table_arg;
ebb7e95d	499	unregister_net_sysctl_table(net->sctp.sysctl_header);
5f19d121	500	kfree(table);
ebb7e95d EB	501	}
ebb7e95d EB	502
26ac8e5f	503	static struct ctl_table_header *sctp_sysctl_header;
1da177e4 LT	504
	505	/* Sysctl registration. */
	506	void sctp_sysctl_register(void)
	507	{
ec8f23ce	508	sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table);
1da177e4 LT	509	}
	510
	511	/* Sysctl deregistration. */
	512	void sctp_sysctl_unregister(void)
	513	{
5dd3df10	514	unregister_net_sysctl_table(sctp_sysctl_header);
1da177e4	515	}