[deliverable/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, 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;

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 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	= "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,
	},

	{ /* 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];
	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)
{
	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
8d987e5c	61	extern long sysctl_sctp_mem[3];
007e3936 VY	62	extern int sysctl_sctp_rmem[3];
007e3936 VY	63	extern int sysctl_sctp_wmem[3];
4d93df0a	64
b486b228	65	static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
3c68198e	66	void __user buffer, size_t lenp,
3c68198e	67	loff_t *ppos);
4f3fdf3b	68	static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
	69	void __user buffer, size_t lenp,
	70	loff_t *ppos);
	71	static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
3c68198e	72	void __user buffer, size_t lenp,
3c68198e	73	loff_t *ppos);
b58537a1 DB	74	static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
	75	void __user buffer, size_t lenp,
	76	loff_t *ppos);
b14878cc VY	77	static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
	78	void __user buffer, size_t lenp,
	79	loff_t *ppos);
4f3fdf3b	80
fe2c6338	81	static struct ctl_table sctp_table[] = {
e1fc3b14 EB	82	{
	83	.procname = "sctp_mem",
	84	.data = &sysctl_sctp_mem,
	85	.maxlen = sizeof(sysctl_sctp_mem),
	86	.mode = 0644,
	87	.proc_handler = proc_doulongvec_minmax
	88	},
	89	{
	90	.procname = "sctp_rmem",
	91	.data = &sysctl_sctp_rmem,
	92	.maxlen = sizeof(sysctl_sctp_rmem),
	93	.mode = 0644,
	94	.proc_handler = proc_dointvec,
	95	},
	96	{
	97	.procname = "sctp_wmem",
	98	.data = &sysctl_sctp_wmem,
	99	.maxlen = sizeof(sysctl_sctp_wmem),
	100	.mode = 0644,
	101	.proc_handler = proc_dointvec,
	102	},
	103
	104	{ /* sentinel */ }
	105	};
	106
fe2c6338	107	static struct ctl_table sctp_net_table[] = {
1da177e4	108	{
1da177e4	109	.procname = "rto_initial",
e1fc3b14	110	.data = &init_net.sctp.rto_initial,
3fd091e7	111	.maxlen = sizeof(unsigned int),
1da177e4	112	.mode = 0644,
6d9f239a	113	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	114	.extra1 = &one,
3fd091e7 VY	115	.extra2 = &timer_max
1da177e4 LT	116	},
1da177e4 LT	117	{
1da177e4	118	.procname = "rto_min",
e1fc3b14	119	.data = &init_net.sctp.rto_min,
3fd091e7	120	.maxlen = sizeof(unsigned int),
1da177e4	121	.mode = 0644,
4f3fdf3b	122	.proc_handler = proc_sctp_do_rto_min,
3fd091e7	123	.extra1 = &one,
4f3fdf3b	124	.extra2 = &init_net.sctp.rto_max
1da177e4 LT	125	},
1da177e4 LT	126	{
1da177e4	127	.procname = "rto_max",
e1fc3b14	128	.data = &init_net.sctp.rto_max,
3fd091e7	129	.maxlen = sizeof(unsigned int),
1da177e4	130	.mode = 0644,
4f3fdf3b	131	.proc_handler = proc_sctp_do_rto_max,
4f3fdf3b	132	.extra1 = &init_net.sctp.rto_min,
3fd091e7	133	.extra2 = &timer_max
1da177e4 LT	134	},
1da177e4 LT	135	{
e1fc3b14 EB	136	.procname = "rto_alpha_exp_divisor",
	137	.data = &init_net.sctp.rto_alpha,
	138	.maxlen = sizeof(int),
b58537a1 DB	139	.mode = 0644,
	140	.proc_handler = proc_sctp_do_alpha_beta,
	141	.extra1 = &rto_alpha_min,
	142	.extra2 = &rto_alpha_max,
e1fc3b14 EB	143	},
	144	{
	145	.procname = "rto_beta_exp_divisor",
	146	.data = &init_net.sctp.rto_beta,
	147	.maxlen = sizeof(int),
b58537a1 DB	148	.mode = 0644,
	149	.proc_handler = proc_sctp_do_alpha_beta,
	150	.extra1 = &rto_beta_min,
	151	.extra2 = &rto_beta_max,
1da177e4 LT	152	},
1da177e4 LT	153	{
1da177e4	154	.procname = "max_burst",
e1fc3b14	155	.data = &init_net.sctp.max_burst,
1da177e4 LT	156	.maxlen = sizeof(int),
1da177e4 LT	157	.mode = 0644,
6d9f239a	158	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	159	.extra1 = &zero,
3fd091e7 VY	160	.extra2 = &int_max
1da177e4 LT	161	},
1da177e4 LT	162	{
e1fc3b14 EB	163	.procname = "cookie_preserve_enable",
e1fc3b14 EB	164	.data = &init_net.sctp.cookie_preserve_enable,
1da177e4 LT	165	.maxlen = sizeof(int),
1da177e4 LT	166	.mode = 0644,
e1fc3b14 EB	167	.proc_handler = proc_dointvec,
e1fc3b14 EB	168	},
3c68198e NH	169	{
3c68198e NH	170	.procname = "cookie_hmac_alg",
22a1f514	171	.data = &init_net.sctp.sctp_hmac_alg,
3c68198e NH	172	.maxlen = 8,
	173	.mode = 0644,
	174	.proc_handler = proc_sctp_do_hmac_alg,
	175	},
e1fc3b14 EB	176	{
	177	.procname = "valid_cookie_life",
	178	.data = &init_net.sctp.valid_cookie_life,
	179	.maxlen = sizeof(unsigned int),
	180	.mode = 0644,
6d9f239a	181	.proc_handler = proc_dointvec_minmax,
e1fc3b14 EB	182	.extra1 = &one,
e1fc3b14 EB	183	.extra2 = &timer_max
1da177e4	184	},
4eb701df	185	{
e1fc3b14 EB	186	.procname = "sack_timeout",
e1fc3b14 EB	187	.data = &init_net.sctp.sack_timeout,
4eb701df NH	188	.maxlen = sizeof(int),
4eb701df NH	189	.mode = 0644,
e1fc3b14 EB	190	.proc_handler = proc_dointvec_minmax,
	191	.extra1 = &sack_timer_min,
	192	.extra2 = &sack_timer_max,
4eb701df	193	},
049b3ff5	194	{
e1fc3b14 EB	195	.procname = "hb_interval",
	196	.data = &init_net.sctp.hb_interval,
	197	.maxlen = sizeof(unsigned int),
049b3ff5	198	.mode = 0644,
e1fc3b14 EB	199	.proc_handler = proc_dointvec_minmax,
	200	.extra1 = &one,
	201	.extra2 = &timer_max
049b3ff5	202	},
1da177e4	203	{
e1fc3b14 EB	204	.procname = "association_max_retrans",
e1fc3b14 EB	205	.data = &init_net.sctp.max_retrans_association,
1da177e4 LT	206	.maxlen = sizeof(int),
1da177e4 LT	207	.mode = 0644,
6d9f239a	208	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	209	.extra1 = &one,
3fd091e7 VY	210	.extra2 = &int_max
1da177e4	211	},
5aa93bcf	212	{
e1fc3b14 EB	213	.procname = "path_max_retrans",
e1fc3b14 EB	214	.data = &init_net.sctp.max_retrans_path,
5aa93bcf NH	215	.maxlen = sizeof(int),
	216	.mode = 0644,
	217	.proc_handler = proc_dointvec_minmax,
e1fc3b14	218	.extra1 = &one,
5aa93bcf NH	219	.extra2 = &int_max
5aa93bcf NH	220	},
1da177e4	221	{
1da177e4	222	.procname = "max_init_retransmits",
e1fc3b14	223	.data = &init_net.sctp.max_retrans_init,
1da177e4 LT	224	.maxlen = sizeof(int),
1da177e4 LT	225	.mode = 0644,
6d9f239a	226	.proc_handler = proc_dointvec_minmax,
3fd091e7 VY	227	.extra1 = &one,
3fd091e7 VY	228	.extra2 = &int_max
1da177e4 LT	229	},
1da177e4 LT	230	{
e1fc3b14 EB	231	.procname = "pf_retrans",
	232	.data = &init_net.sctp.pf_retrans,
	233	.maxlen = sizeof(int),
1da177e4	234	.mode = 0644,
6d9f239a	235	.proc_handler = proc_dointvec_minmax,
e1fc3b14 EB	236	.extra1 = &zero,
e1fc3b14 EB	237	.extra2 = &int_max
1da177e4 LT	238	},
1da177e4 LT	239	{
e1fc3b14 EB	240	.procname = "sndbuf_policy",
e1fc3b14 EB	241	.data = &init_net.sctp.sndbuf_policy,
8116ffad	242	.maxlen = sizeof(int),
1da177e4	243	.mode = 0644,
6d9f239a	244	.proc_handler = proc_dointvec,
1da177e4 LT	245	},
1da177e4 LT	246	{
e1fc3b14 EB	247	.procname = "rcvbuf_policy",
e1fc3b14 EB	248	.data = &init_net.sctp.rcvbuf_policy,
dd51be0f MH	249	.maxlen = sizeof(int),
	250	.mode = 0644,
	251	.proc_handler = proc_dointvec,
	252	},
	253	{
	254	.procname = "default_auto_asconf",
e1fc3b14	255	.data = &init_net.sctp.default_auto_asconf,
1da177e4 LT	256	.maxlen = sizeof(int),
1da177e4 LT	257	.mode = 0644,
6d9f239a	258	.proc_handler = proc_dointvec,
1da177e4 LT	259	},
1da177e4 LT	260	{
e1fc3b14 EB	261	.procname = "addip_enable",
e1fc3b14 EB	262	.data = &init_net.sctp.addip_enable,
1da177e4 LT	263	.maxlen = sizeof(int),
1da177e4 LT	264	.mode = 0644,
6d9f239a	265	.proc_handler = proc_dointvec,
1da177e4	266	},
2f85a429	267	{
e1fc3b14 EB	268	.procname = "addip_noauth_enable",
e1fc3b14 EB	269	.data = &init_net.sctp.addip_noauth,
d48e074d	270	.maxlen = sizeof(int),
2f85a429	271	.mode = 0644,
6d9f239a	272	.proc_handler = proc_dointvec,
4d93df0a NH	273	},
4d93df0a NH	274	{
e1fc3b14 EB	275	.procname = "prsctp_enable",
e1fc3b14 EB	276	.data = &init_net.sctp.prsctp_enable,
a29a5bd4 VY	277	.maxlen = sizeof(int),
a29a5bd4 VY	278	.mode = 0644,
6d9f239a	279	.proc_handler = proc_dointvec,
a29a5bd4	280	},
73d9c4fd	281	{
e1fc3b14 EB	282	.procname = "auth_enable",
e1fc3b14 EB	283	.data = &init_net.sctp.auth_enable,
73d9c4fd VY	284	.maxlen = sizeof(int),
73d9c4fd VY	285	.mode = 0644,
b14878cc	286	.proc_handler = proc_sctp_do_auth,
73d9c4fd	287	},
72388433	288	{
72388433	289	.procname = "addr_scope_policy",
e1fc3b14	290	.data = &init_net.sctp.scope_policy,
72388433 BD	291	.maxlen = sizeof(int),
72388433 BD	292	.mode = 0644,
6d456111	293	.proc_handler = proc_dointvec_minmax,
72388433 BD	294	.extra1 = &zero,
	295	.extra2 = &addr_scope_max,
	296	},
90f2f531	297	{
90f2f531	298	.procname = "rwnd_update_shift",
e1fc3b14	299	.data = &init_net.sctp.rwnd_upd_shift,
90f2f531 VY	300	.maxlen = sizeof(int),
	301	.mode = 0644,
	302	.proc_handler = &proc_dointvec_minmax,
90f2f531 VY	303	.extra1 = &one,
	304	.extra2 = &rwnd_scale_max,
	305	},
2692ba61 XW	306	{
2692ba61 XW	307	.procname = "max_autoclose",
e1fc3b14	308	.data = &init_net.sctp.max_autoclose,
2692ba61 XW	309	.maxlen = sizeof(unsigned long),
	310	.mode = 0644,
	311	.proc_handler = &proc_doulongvec_minmax,
	312	.extra1 = &max_autoclose_min,
	313	.extra2 = &max_autoclose_max,
	314	},
71acc0dd	315
d7fc02c7	316	{ /* sentinel */ }
1da177e4 LT	317	};
1da177e4 LT	318
b486b228	319	static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
3c68198e NH	320	void __user buffer, size_t lenp,
	321	loff_t *ppos)
	322	{
	323	struct net *net = current->nsproxy->net_ns;
fe2c6338	324	struct ctl_table tbl;
ff5e92c1	325	bool changed = false;
3c68198e	326	char *none = "none";
ff5e92c1 DB	327	char tmp[8];
ff5e92c1 DB	328	int ret;
3c68198e NH	329
	330	memset(&tbl, 0, sizeof(struct ctl_table));
	331
	332	if (write) {
	333	tbl.data = tmp;
ff5e92c1	334	tbl.maxlen = sizeof(tmp);
3c68198e NH	335	} else {
	336	tbl.data = net->sctp.sctp_hmac_alg ? : none;
	337	tbl.maxlen = strlen(tbl.data);
	338	}
3c68198e	339
ff5e92c1 DB	340	ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
ff5e92c1 DB	341	if (write && ret == 0) {
3c68198e NH	342	#ifdef CONFIG_CRYPTO_MD5
	343	if (!strncmp(tmp, "md5", 3)) {
	344	net->sctp.sctp_hmac_alg = "md5";
ff5e92c1	345	changed = true;
3c68198e NH	346	}
	347	#endif
	348	#ifdef CONFIG_CRYPTO_SHA1
	349	if (!strncmp(tmp, "sha1", 4)) {
	350	net->sctp.sctp_hmac_alg = "sha1";
ff5e92c1	351	changed = true;
3c68198e NH	352	}
	353	#endif
	354	if (!strncmp(tmp, "none", 4)) {
	355	net->sctp.sctp_hmac_alg = NULL;
ff5e92c1	356	changed = true;
3c68198e	357	}
3c68198e NH	358	if (!changed)
	359	ret = -EINVAL;
	360	}
	361
	362	return ret;
	363	}
	364
4f3fdf3b	365	static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
	366	void __user buffer, size_t lenp,
	367	loff_t *ppos)
	368	{
	369	struct net *net = current->nsproxy->net_ns;
4f3fdf3b	370	unsigned int min = (unsigned int ) ctl->extra1;
4f3fdf3b	371	unsigned int max = (unsigned int ) ctl->extra2;
ff5e92c1 DB	372	struct ctl_table tbl;
ff5e92c1 DB	373	int ret, new_value;
4f3fdf3b	374
	375	memset(&tbl, 0, sizeof(struct ctl_table));
	376	tbl.maxlen = sizeof(unsigned int);
	377
	378	if (write)
	379	tbl.data = &new_value;
	380	else
	381	tbl.data = &net->sctp.rto_min;
ff5e92c1	382
4f3fdf3b	383	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
ff5e92c1 DB	384	if (write && ret == 0) {
ff5e92c1 DB	385	if (new_value > max \|\| new_value < min)
4f3fdf3b	386	return -EINVAL;
ff5e92c1	387
4f3fdf3b	388	net->sctp.rto_min = new_value;
4f3fdf3b	389	}
ff5e92c1	390
4f3fdf3b	391	return ret;
	392	}
	393
	394	static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
	395	void __user buffer, size_t lenp,
	396	loff_t *ppos)
	397	{
	398	struct net *net = current->nsproxy->net_ns;
4f3fdf3b	399	unsigned int min = (unsigned int ) ctl->extra1;
4f3fdf3b	400	unsigned int max = (unsigned int ) ctl->extra2;
ff5e92c1 DB	401	struct ctl_table tbl;
ff5e92c1 DB	402	int ret, new_value;
4f3fdf3b	403
	404	memset(&tbl, 0, sizeof(struct ctl_table));
	405	tbl.maxlen = sizeof(unsigned int);
	406
	407	if (write)
	408	tbl.data = &new_value;
	409	else
	410	tbl.data = &net->sctp.rto_max;
ff5e92c1	411
4f3fdf3b	412	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
ff5e92c1 DB	413	if (write && ret == 0) {
ff5e92c1 DB	414	if (new_value > max \|\| new_value < min)
4f3fdf3b	415	return -EINVAL;
ff5e92c1	416
4f3fdf3b	417	net->sctp.rto_max = new_value;
4f3fdf3b	418	}
ff5e92c1	419
4f3fdf3b	420	return ret;
	421	}
	422
b58537a1 DB	423	static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
	424	void __user buffer, size_t lenp,
	425	loff_t *ppos)
	426	{
	427	pr_warn_once("Changing rto_alpha or rto_beta may lead to "
	428	"suboptimal rtt/srtt estimations!\n");
	429
	430	return proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
	431	}
	432
b14878cc VY	433	static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
	434	void __user buffer, size_t lenp,
	435	loff_t *ppos)
	436	{
	437	struct net *net = current->nsproxy->net_ns;
	438	struct ctl_table tbl;
	439	int new_value, ret;
	440
	441	memset(&tbl, 0, sizeof(struct ctl_table));
	442	tbl.maxlen = sizeof(unsigned int);
	443
	444	if (write)
	445	tbl.data = &new_value;
	446	else
	447	tbl.data = &net->sctp.auth_enable;
	448
	449	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
24599e61	450	if (write && ret == 0) {
b14878cc VY	451	struct sock *sk = net->sctp.ctl_sock;
	452
	453	net->sctp.auth_enable = new_value;
	454	/* Update the value in the control socket */
	455	lock_sock(sk);
	456	sctp_sk(sk)->ep->auth_enable = new_value;
	457	release_sock(sk);
	458	}
	459
	460	return ret;
	461	}
	462
ebb7e95d EB	463	int sctp_sysctl_net_register(struct net *net)
ebb7e95d EB	464	{
eb9f3705	465	struct ctl_table *table;
eb9f3705	466	int i;
ebb7e95d	467
eb9f3705	468	table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);
	469	if (!table)
	470	return -ENOMEM;
ebb7e95d	471
eb9f3705	472	for (i = 0; table[i].data; i++)
eb9f3705	473	table[i].data += (char )(&net->sctp) - (char )&init_net.sctp;
e1fc3b14	474
ebb7e95d	475	net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table);
f66138c8	476	if (net->sctp.sysctl_header == NULL) {
	477	kfree(table);
	478	return -ENOMEM;
	479	}
ebb7e95d EB	480	return 0;
	481	}
	482
	483	void sctp_sysctl_net_unregister(struct net *net)
	484	{
5f19d121 VY	485	struct ctl_table *table;
	486
	487	table = net->sctp.sysctl_header->ctl_table_arg;
ebb7e95d	488	unregister_net_sysctl_table(net->sctp.sysctl_header);
5f19d121	489	kfree(table);
ebb7e95d EB	490	}
ebb7e95d EB	491
26ac8e5f	492	static struct ctl_table_header *sctp_sysctl_header;
1da177e4 LT	493
	494	/* Sysctl registration. */
	495	void sctp_sysctl_register(void)
	496	{
ec8f23ce	497	sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table);
1da177e4 LT	498	}
	499
	500	/* Sysctl deregistration. */
	501	void sctp_sysctl_unregister(void)
	502	{
5dd3df10	503	unregister_net_sysctl_table(sctp_sysctl_header);
1da177e4	504	}