[linux-2.6-block.git] / net / sctp / sysctl.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* 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.
 *
 * 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 timer_max = 86400000; /* ms in one day */
static int sack_timer_min = 1;
static int sack_timer_max = 500;
static int addr_scope_max = SCTP_SCOPE_POLICY_MAX;
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         = SYSCTL_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         = SYSCTL_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		= SYSCTL_ZERO,
		.extra2		= SYSCTL_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         = SYSCTL_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         = SYSCTL_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		= SYSCTL_ONE,
		.extra2		= SYSCTL_INT_MAX,
	},
	{
		.procname	= "path_max_retrans",
		.data		= &init_net.sctp.max_retrans_path,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= SYSCTL_ONE,
		.extra2		= SYSCTL_INT_MAX,
	},
	{
		.procname	= "max_init_retransmits",
		.data		= &init_net.sctp.max_retrans_init,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= SYSCTL_ONE,
		.extra2		= SYSCTL_INT_MAX,
	},
	{
		.procname	= "pf_retrans",
		.data		= &init_net.sctp.pf_retrans,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= SYSCTL_ZERO,
		.extra2		= SYSCTL_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	= "intl_enable",
		.data		= &init_net.sctp.intl_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		= SYSCTL_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		= SYSCTL_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
47505b8b	1	// SPDX-License-Identifier: GPL-2.0-or-later
60c778b2	2	/* SCTP kernel implementation
1da177e4 LT	3	* (C) Copyright IBM Corp. 2002, 2004
	4	* Copyright (c) 2002 Intel Corp.
	5	*
60c778b2	6	* This file is part of the SCTP kernel implementation
1da177e4 LT	7	*
	8	* Sysctl related interfaces for SCTP.
	9	*
1da177e4 LT	10	* Please send any bug reports or fixes you make to the
1da177e4 LT	11	* email address(es):
91705c61	12	* lksctp developers <linux-sctp@vger.kernel.org>
1da177e4	13	*
1da177e4 LT	14	* Written or modified by:
	15	* Mingqin Liu <liuming@us.ibm.com>
	16	* Jon Grimm <jgrimm@us.ibm.com>
	17	* Ardelle Fan <ardelle.fan@intel.com>
	18	* Ryan Layer <rmlayer@us.ibm.com>
	19	* Sridhar Samudrala <sri@us.ibm.com>
1da177e4 LT	20	*/
1da177e4 LT	21
b58537a1 DB	22	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
b58537a1 DB	23
1da177e4	24	#include <net/sctp/structs.h>
8c5955d8	25	#include <net/sctp/sctp.h>
1da177e4 LT	26	#include <linux/sysctl.h>
1da177e4 LT	27
3fd091e7	28	static int timer_max = 86400000; /* ms in one day */
d48e074d JMG	29	static int sack_timer_min = 1;
d48e074d JMG	30	static int sack_timer_max = 500;
701ef3e6	31	static int addr_scope_max = SCTP_SCOPE_POLICY_MAX;
90f2f531	32	static int rwnd_scale_max = 16;
b58537a1 DB	33	static int rto_alpha_min = 0;
	34	static int rto_beta_min = 0;
	35	static int rto_alpha_max = 1000;
	36	static int rto_beta_max = 1000;
	37
2692ba61 XW	38	static unsigned long max_autoclose_min = 0;
	39	static unsigned long max_autoclose_max =
	40	(MAX_SCHEDULE_TIMEOUT / HZ > UINT_MAX)
	41	? UINT_MAX : MAX_SCHEDULE_TIMEOUT / HZ;
1da177e4	42
b486b228	43	static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
3c68198e	44	void __user buffer, size_t lenp,
3c68198e	45	loff_t *ppos);
4f3fdf3b	46	static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
	47	void __user buffer, size_t lenp,
	48	loff_t *ppos);
	49	static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
3c68198e	50	void __user buffer, size_t lenp,
3c68198e	51	loff_t *ppos);
b58537a1 DB	52	static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
	53	void __user buffer, size_t lenp,
	54	loff_t *ppos);
b14878cc VY	55	static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
	56	void __user buffer, size_t lenp,
	57	loff_t *ppos);
4f3fdf3b	58
fe2c6338	59	static struct ctl_table sctp_table[] = {
e1fc3b14 EB	60	{
	61	.procname = "sctp_mem",
	62	.data = &sysctl_sctp_mem,
	63	.maxlen = sizeof(sysctl_sctp_mem),
	64	.mode = 0644,
	65	.proc_handler = proc_doulongvec_minmax
	66	},
	67	{
	68	.procname = "sctp_rmem",
	69	.data = &sysctl_sctp_rmem,
	70	.maxlen = sizeof(sysctl_sctp_rmem),
	71	.mode = 0644,
	72	.proc_handler = proc_dointvec,
	73	},
	74	{
	75	.procname = "sctp_wmem",
	76	.data = &sysctl_sctp_wmem,
	77	.maxlen = sizeof(sysctl_sctp_wmem),
	78	.mode = 0644,
	79	.proc_handler = proc_dointvec,
	80	},
	81
	82	{ /* sentinel */ }
	83	};
	84
fe2c6338	85	static struct ctl_table sctp_net_table[] = {
1da177e4	86	{
1da177e4	87	.procname = "rto_initial",
e1fc3b14	88	.data = &init_net.sctp.rto_initial,
3fd091e7	89	.maxlen = sizeof(unsigned int),
1da177e4	90	.mode = 0644,
6d9f239a	91	.proc_handler = proc_dointvec_minmax,
eec4844f	92	.extra1 = SYSCTL_ONE,
3fd091e7	93	.extra2 = &timer_max
1da177e4 LT	94	},
1da177e4 LT	95	{
1da177e4	96	.procname = "rto_min",
e1fc3b14	97	.data = &init_net.sctp.rto_min,
3fd091e7	98	.maxlen = sizeof(unsigned int),
1da177e4	99	.mode = 0644,
4f3fdf3b	100	.proc_handler = proc_sctp_do_rto_min,
eec4844f	101	.extra1 = SYSCTL_ONE,
4f3fdf3b	102	.extra2 = &init_net.sctp.rto_max
1da177e4 LT	103	},
1da177e4 LT	104	{
1da177e4	105	.procname = "rto_max",
e1fc3b14	106	.data = &init_net.sctp.rto_max,
3fd091e7	107	.maxlen = sizeof(unsigned int),
1da177e4	108	.mode = 0644,
4f3fdf3b	109	.proc_handler = proc_sctp_do_rto_max,
4f3fdf3b	110	.extra1 = &init_net.sctp.rto_min,
3fd091e7	111	.extra2 = &timer_max
1da177e4 LT	112	},
1da177e4 LT	113	{
e1fc3b14 EB	114	.procname = "rto_alpha_exp_divisor",
	115	.data = &init_net.sctp.rto_alpha,
	116	.maxlen = sizeof(int),
b58537a1 DB	117	.mode = 0644,
	118	.proc_handler = proc_sctp_do_alpha_beta,
	119	.extra1 = &rto_alpha_min,
	120	.extra2 = &rto_alpha_max,
e1fc3b14 EB	121	},
	122	{
	123	.procname = "rto_beta_exp_divisor",
	124	.data = &init_net.sctp.rto_beta,
	125	.maxlen = sizeof(int),
b58537a1 DB	126	.mode = 0644,
	127	.proc_handler = proc_sctp_do_alpha_beta,
	128	.extra1 = &rto_beta_min,
	129	.extra2 = &rto_beta_max,
1da177e4 LT	130	},
1da177e4 LT	131	{
1da177e4	132	.procname = "max_burst",
e1fc3b14	133	.data = &init_net.sctp.max_burst,
1da177e4 LT	134	.maxlen = sizeof(int),
1da177e4 LT	135	.mode = 0644,
6d9f239a	136	.proc_handler = proc_dointvec_minmax,
eec4844f MC	137	.extra1 = SYSCTL_ZERO,
eec4844f MC	138	.extra2 = SYSCTL_INT_MAX,
1da177e4 LT	139	},
1da177e4 LT	140	{
e1fc3b14 EB	141	.procname = "cookie_preserve_enable",
e1fc3b14 EB	142	.data = &init_net.sctp.cookie_preserve_enable,
1da177e4 LT	143	.maxlen = sizeof(int),
1da177e4 LT	144	.mode = 0644,
e1fc3b14 EB	145	.proc_handler = proc_dointvec,
e1fc3b14 EB	146	},
3c68198e NH	147	{
3c68198e NH	148	.procname = "cookie_hmac_alg",
22a1f514	149	.data = &init_net.sctp.sctp_hmac_alg,
3c68198e NH	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,
eec4844f	160	.extra1 = SYSCTL_ONE,
e1fc3b14	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	177	.proc_handler = proc_dointvec_minmax,
eec4844f	178	.extra1 = SYSCTL_ONE,
e1fc3b14	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,
eec4844f MC	187	.extra1 = SYSCTL_ONE,
eec4844f MC	188	.extra2 = SYSCTL_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,
eec4844f MC	196	.extra1 = SYSCTL_ONE,
eec4844f MC	197	.extra2 = SYSCTL_INT_MAX,
5aa93bcf	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,
eec4844f MC	205	.extra1 = SYSCTL_ONE,
eec4844f MC	206	.extra2 = SYSCTL_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,
eec4844f MC	214	.extra1 = SYSCTL_ZERO,
eec4844f MC	215	.extra2 = SYSCTL_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	},
c0d8bab6 XL	259	{
	260	.procname = "reconf_enable",
	261	.data = &init_net.sctp.reconf_enable,
	262	.maxlen = sizeof(int),
	263	.mode = 0644,
	264	.proc_handler = proc_dointvec,
	265	},
73d9c4fd	266	{
e1fc3b14 EB	267	.procname = "auth_enable",
e1fc3b14 EB	268	.data = &init_net.sctp.auth_enable,
73d9c4fd VY	269	.maxlen = sizeof(int),
73d9c4fd VY	270	.mode = 0644,
b14878cc	271	.proc_handler = proc_sctp_do_auth,
73d9c4fd	272	},
463118c3 XL	273	{
	274	.procname = "intl_enable",
	275	.data = &init_net.sctp.intl_enable,
	276	.maxlen = sizeof(int),
	277	.mode = 0644,
	278	.proc_handler = proc_dointvec,
	279	},
72388433	280	{
72388433	281	.procname = "addr_scope_policy",
e1fc3b14	282	.data = &init_net.sctp.scope_policy,
72388433 BD	283	.maxlen = sizeof(int),
72388433 BD	284	.mode = 0644,
6d456111	285	.proc_handler = proc_dointvec_minmax,
eec4844f	286	.extra1 = SYSCTL_ZERO,
72388433 BD	287	.extra2 = &addr_scope_max,
72388433 BD	288	},
90f2f531	289	{
90f2f531	290	.procname = "rwnd_update_shift",
e1fc3b14	291	.data = &init_net.sctp.rwnd_upd_shift,
90f2f531 VY	292	.maxlen = sizeof(int),
	293	.mode = 0644,
	294	.proc_handler = &proc_dointvec_minmax,
eec4844f	295	.extra1 = SYSCTL_ONE,
90f2f531 VY	296	.extra2 = &rwnd_scale_max,
90f2f531 VY	297	},
2692ba61 XW	298	{
2692ba61 XW	299	.procname = "max_autoclose",
e1fc3b14	300	.data = &init_net.sctp.max_autoclose,
2692ba61 XW	301	.maxlen = sizeof(unsigned long),
	302	.mode = 0644,
	303	.proc_handler = &proc_doulongvec_minmax,
	304	.extra1 = &max_autoclose_min,
	305	.extra2 = &max_autoclose_max,
	306	},
566178f8 ZY	307	{
	308	.procname = "pf_enable",
	309	.data = &init_net.sctp.pf_enable,
	310	.maxlen = sizeof(int),
	311	.mode = 0644,
	312	.proc_handler = proc_dointvec,
	313	},
71acc0dd	314
d7fc02c7	315	{ /* sentinel */ }
1da177e4 LT	316	};
1da177e4 LT	317
b486b228	318	static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
3c68198e NH	319	void __user buffer, size_t lenp,
	320	loff_t *ppos)
	321	{
	322	struct net *net = current->nsproxy->net_ns;
fe2c6338	323	struct ctl_table tbl;
ff5e92c1	324	bool changed = false;
3c68198e	325	char *none = "none";
320f1a4a	326	char tmp[8] = {0};
ff5e92c1	327	int ret;
3c68198e NH	328
	329	memset(&tbl, 0, sizeof(struct ctl_table));
	330
	331	if (write) {
	332	tbl.data = tmp;
ff5e92c1	333	tbl.maxlen = sizeof(tmp);
3c68198e NH	334	} else {
	335	tbl.data = net->sctp.sctp_hmac_alg ? : none;
	336	tbl.maxlen = strlen(tbl.data);
	337	}
3c68198e	338
ff5e92c1 DB	339	ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
ff5e92c1 DB	340	if (write && ret == 0) {
3c68198e NH	341	#ifdef CONFIG_CRYPTO_MD5
	342	if (!strncmp(tmp, "md5", 3)) {
	343	net->sctp.sctp_hmac_alg = "md5";
ff5e92c1	344	changed = true;
3c68198e NH	345	}
	346	#endif
	347	#ifdef CONFIG_CRYPTO_SHA1
	348	if (!strncmp(tmp, "sha1", 4)) {
	349	net->sctp.sctp_hmac_alg = "sha1";
ff5e92c1	350	changed = true;
3c68198e NH	351	}
	352	#endif
	353	if (!strncmp(tmp, "none", 4)) {
	354	net->sctp.sctp_hmac_alg = NULL;
ff5e92c1	355	changed = true;
3c68198e	356	}
3c68198e NH	357	if (!changed)
	358	ret = -EINVAL;
	359	}
	360
	361	return ret;
	362	}
	363
4f3fdf3b	364	static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
	365	void __user buffer, size_t lenp,
	366	loff_t *ppos)
	367	{
	368	struct net *net = current->nsproxy->net_ns;
4f3fdf3b	369	unsigned int min = (unsigned int ) ctl->extra1;
4f3fdf3b	370	unsigned int max = (unsigned int ) ctl->extra2;
ff5e92c1 DB	371	struct ctl_table tbl;
ff5e92c1 DB	372	int ret, new_value;
4f3fdf3b	373
	374	memset(&tbl, 0, sizeof(struct ctl_table));
	375	tbl.maxlen = sizeof(unsigned int);
	376
	377	if (write)
	378	tbl.data = &new_value;
	379	else
	380	tbl.data = &net->sctp.rto_min;
ff5e92c1	381
4f3fdf3b	382	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
ff5e92c1 DB	383	if (write && ret == 0) {
ff5e92c1 DB	384	if (new_value > max \|\| new_value < min)
4f3fdf3b	385	return -EINVAL;
ff5e92c1	386
4f3fdf3b	387	net->sctp.rto_min = new_value;
4f3fdf3b	388	}
ff5e92c1	389
4f3fdf3b	390	return ret;
	391	}
	392
	393	static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
	394	void __user buffer, size_t lenp,
	395	loff_t *ppos)
	396	{
	397	struct net *net = current->nsproxy->net_ns;
4f3fdf3b	398	unsigned int min = (unsigned int ) ctl->extra1;
4f3fdf3b	399	unsigned int max = (unsigned int ) ctl->extra2;
ff5e92c1 DB	400	struct ctl_table tbl;
ff5e92c1 DB	401	int ret, new_value;
4f3fdf3b	402
	403	memset(&tbl, 0, sizeof(struct ctl_table));
	404	tbl.maxlen = sizeof(unsigned int);
	405
	406	if (write)
	407	tbl.data = &new_value;
	408	else
	409	tbl.data = &net->sctp.rto_max;
ff5e92c1	410
4f3fdf3b	411	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
ff5e92c1 DB	412	if (write && ret == 0) {
ff5e92c1 DB	413	if (new_value > max \|\| new_value < min)
4f3fdf3b	414	return -EINVAL;
ff5e92c1	415
4f3fdf3b	416	net->sctp.rto_max = new_value;
4f3fdf3b	417	}
ff5e92c1	418
4f3fdf3b	419	return ret;
	420	}
	421
b58537a1 DB	422	static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
	423	void __user buffer, size_t lenp,
	424	loff_t *ppos)
	425	{
eaea2da7 DB	426	if (write)
	427	pr_warn_once("Changing rto_alpha or rto_beta may lead to "
	428	"suboptimal rtt/srtt estimations!\n");
b58537a1 DB	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	}