[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 int pf_expose_max = SCTP_PF_EXPOSE_MAX;
static int ps_retrans_max = SCTP_PS_RETRANS_MAX;

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 *buffer, size_t *lenp, loff_t *ppos);
static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
				void *buffer, size_t *lenp, loff_t *ppos);
static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write, void *buffer,
				size_t *lenp, loff_t *ppos);
static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
				   void *buffer, size_t *lenp, loff_t *ppos);
static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
			     void *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		= &init_net.sctp.ps_retrans,
	},
	{
		.procname	= "ps_retrans",
		.data		= &init_net.sctp.ps_retrans,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= &init_net.sctp.pf_retrans,
		.extra2		= &ps_retrans_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	= "ecn_enable",
		.data		= &init_net.sctp.ecn_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,
	},
	{
		.procname	= "pf_expose",
		.data		= &init_net.sctp.pf_expose,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= SYSCTL_ZERO,
		.extra2		= &pf_expose_max,
	},

	{ /* sentinel */ }
};

static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
				 void *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 *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 *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 *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 *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;
aef587be	37	static int pf_expose_max = SCTP_PF_EXPOSE_MAX;
34515e94	38	static int ps_retrans_max = SCTP_PS_RETRANS_MAX;
b58537a1	39
2692ba61 XW	40	static unsigned long max_autoclose_min = 0;
	41	static unsigned long max_autoclose_max =
	42	(MAX_SCHEDULE_TIMEOUT / HZ > UINT_MAX)
	43	? UINT_MAX : MAX_SCHEDULE_TIMEOUT / HZ;
1da177e4	44
b486b228	45	static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
32927393	46	void buffer, size_t lenp, loff_t *ppos);
4f3fdf3b	47	static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
32927393 CH	48	void buffer, size_t lenp, loff_t *ppos);
	49	static int proc_sctp_do_rto_max(struct ctl_table ctl, int write, void buffer,
	50	size_t lenp, loff_t ppos);
b58537a1	51	static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
32927393	52	void buffer, size_t lenp, loff_t *ppos);
b14878cc	53	static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
32927393	54	void buffer, size_t lenp, loff_t *ppos);
4f3fdf3b	55
fe2c6338	56	static struct ctl_table sctp_table[] = {
e1fc3b14 EB	57	{
	58	.procname = "sctp_mem",
	59	.data = &sysctl_sctp_mem,
	60	.maxlen = sizeof(sysctl_sctp_mem),
	61	.mode = 0644,
	62	.proc_handler = proc_doulongvec_minmax
	63	},
	64	{
	65	.procname = "sctp_rmem",
	66	.data = &sysctl_sctp_rmem,
	67	.maxlen = sizeof(sysctl_sctp_rmem),
	68	.mode = 0644,
	69	.proc_handler = proc_dointvec,
	70	},
	71	{
	72	.procname = "sctp_wmem",
	73	.data = &sysctl_sctp_wmem,
	74	.maxlen = sizeof(sysctl_sctp_wmem),
	75	.mode = 0644,
	76	.proc_handler = proc_dointvec,
	77	},
	78
	79	{ /* sentinel */ }
	80	};
	81
fe2c6338	82	static struct ctl_table sctp_net_table[] = {
1da177e4	83	{
1da177e4	84	.procname = "rto_initial",
e1fc3b14	85	.data = &init_net.sctp.rto_initial,
3fd091e7	86	.maxlen = sizeof(unsigned int),
1da177e4	87	.mode = 0644,
6d9f239a	88	.proc_handler = proc_dointvec_minmax,
eec4844f	89	.extra1 = SYSCTL_ONE,
3fd091e7	90	.extra2 = &timer_max
1da177e4 LT	91	},
1da177e4 LT	92	{
1da177e4	93	.procname = "rto_min",
e1fc3b14	94	.data = &init_net.sctp.rto_min,
3fd091e7	95	.maxlen = sizeof(unsigned int),
1da177e4	96	.mode = 0644,
4f3fdf3b	97	.proc_handler = proc_sctp_do_rto_min,
eec4844f	98	.extra1 = SYSCTL_ONE,
4f3fdf3b	99	.extra2 = &init_net.sctp.rto_max
1da177e4 LT	100	},
1da177e4 LT	101	{
1da177e4	102	.procname = "rto_max",
e1fc3b14	103	.data = &init_net.sctp.rto_max,
3fd091e7	104	.maxlen = sizeof(unsigned int),
1da177e4	105	.mode = 0644,
4f3fdf3b	106	.proc_handler = proc_sctp_do_rto_max,
4f3fdf3b	107	.extra1 = &init_net.sctp.rto_min,
3fd091e7	108	.extra2 = &timer_max
1da177e4 LT	109	},
1da177e4 LT	110	{
e1fc3b14 EB	111	.procname = "rto_alpha_exp_divisor",
	112	.data = &init_net.sctp.rto_alpha,
	113	.maxlen = sizeof(int),
b58537a1 DB	114	.mode = 0644,
	115	.proc_handler = proc_sctp_do_alpha_beta,
	116	.extra1 = &rto_alpha_min,
	117	.extra2 = &rto_alpha_max,
e1fc3b14 EB	118	},
	119	{
	120	.procname = "rto_beta_exp_divisor",
	121	.data = &init_net.sctp.rto_beta,
	122	.maxlen = sizeof(int),
b58537a1 DB	123	.mode = 0644,
	124	.proc_handler = proc_sctp_do_alpha_beta,
	125	.extra1 = &rto_beta_min,
	126	.extra2 = &rto_beta_max,
1da177e4 LT	127	},
1da177e4 LT	128	{
1da177e4	129	.procname = "max_burst",
e1fc3b14	130	.data = &init_net.sctp.max_burst,
1da177e4 LT	131	.maxlen = sizeof(int),
1da177e4 LT	132	.mode = 0644,
6d9f239a	133	.proc_handler = proc_dointvec_minmax,
eec4844f MC	134	.extra1 = SYSCTL_ZERO,
eec4844f MC	135	.extra2 = SYSCTL_INT_MAX,
1da177e4 LT	136	},
1da177e4 LT	137	{
e1fc3b14 EB	138	.procname = "cookie_preserve_enable",
e1fc3b14 EB	139	.data = &init_net.sctp.cookie_preserve_enable,
1da177e4 LT	140	.maxlen = sizeof(int),
1da177e4 LT	141	.mode = 0644,
e1fc3b14 EB	142	.proc_handler = proc_dointvec,
e1fc3b14 EB	143	},
3c68198e NH	144	{
3c68198e NH	145	.procname = "cookie_hmac_alg",
22a1f514	146	.data = &init_net.sctp.sctp_hmac_alg,
3c68198e NH	147	.maxlen = 8,
	148	.mode = 0644,
	149	.proc_handler = proc_sctp_do_hmac_alg,
	150	},
e1fc3b14 EB	151	{
	152	.procname = "valid_cookie_life",
	153	.data = &init_net.sctp.valid_cookie_life,
	154	.maxlen = sizeof(unsigned int),
	155	.mode = 0644,
6d9f239a	156	.proc_handler = proc_dointvec_minmax,
eec4844f	157	.extra1 = SYSCTL_ONE,
e1fc3b14	158	.extra2 = &timer_max
1da177e4	159	},
4eb701df	160	{
e1fc3b14 EB	161	.procname = "sack_timeout",
e1fc3b14 EB	162	.data = &init_net.sctp.sack_timeout,
4eb701df NH	163	.maxlen = sizeof(int),
4eb701df NH	164	.mode = 0644,
e1fc3b14 EB	165	.proc_handler = proc_dointvec_minmax,
	166	.extra1 = &sack_timer_min,
	167	.extra2 = &sack_timer_max,
4eb701df	168	},
049b3ff5	169	{
e1fc3b14 EB	170	.procname = "hb_interval",
	171	.data = &init_net.sctp.hb_interval,
	172	.maxlen = sizeof(unsigned int),
049b3ff5	173	.mode = 0644,
e1fc3b14	174	.proc_handler = proc_dointvec_minmax,
eec4844f	175	.extra1 = SYSCTL_ONE,
e1fc3b14	176	.extra2 = &timer_max
049b3ff5	177	},
1da177e4	178	{
e1fc3b14 EB	179	.procname = "association_max_retrans",
e1fc3b14 EB	180	.data = &init_net.sctp.max_retrans_association,
1da177e4 LT	181	.maxlen = sizeof(int),
1da177e4 LT	182	.mode = 0644,
6d9f239a	183	.proc_handler = proc_dointvec_minmax,
eec4844f MC	184	.extra1 = SYSCTL_ONE,
eec4844f MC	185	.extra2 = SYSCTL_INT_MAX,
1da177e4	186	},
5aa93bcf	187	{
e1fc3b14 EB	188	.procname = "path_max_retrans",
e1fc3b14 EB	189	.data = &init_net.sctp.max_retrans_path,
5aa93bcf NH	190	.maxlen = sizeof(int),
	191	.mode = 0644,
	192	.proc_handler = proc_dointvec_minmax,
eec4844f MC	193	.extra1 = SYSCTL_ONE,
eec4844f MC	194	.extra2 = SYSCTL_INT_MAX,
5aa93bcf	195	},
1da177e4	196	{
1da177e4	197	.procname = "max_init_retransmits",
e1fc3b14	198	.data = &init_net.sctp.max_retrans_init,
1da177e4 LT	199	.maxlen = sizeof(int),
1da177e4 LT	200	.mode = 0644,
6d9f239a	201	.proc_handler = proc_dointvec_minmax,
eec4844f MC	202	.extra1 = SYSCTL_ONE,
eec4844f MC	203	.extra2 = SYSCTL_INT_MAX,
1da177e4 LT	204	},
1da177e4 LT	205	{
e1fc3b14 EB	206	.procname = "pf_retrans",
	207	.data = &init_net.sctp.pf_retrans,
	208	.maxlen = sizeof(int),
1da177e4	209	.mode = 0644,
6d9f239a	210	.proc_handler = proc_dointvec_minmax,
eec4844f	211	.extra1 = SYSCTL_ZERO,
34515e94 XL	212	.extra2 = &init_net.sctp.ps_retrans,
	213	},
	214	{
	215	.procname = "ps_retrans",
	216	.data = &init_net.sctp.ps_retrans,
	217	.maxlen = sizeof(int),
	218	.mode = 0644,
	219	.proc_handler = proc_dointvec_minmax,
	220	.extra1 = &init_net.sctp.pf_retrans,
	221	.extra2 = &ps_retrans_max,
1da177e4 LT	222	},
1da177e4 LT	223	{
e1fc3b14 EB	224	.procname = "sndbuf_policy",
e1fc3b14 EB	225	.data = &init_net.sctp.sndbuf_policy,
8116ffad	226	.maxlen = sizeof(int),
1da177e4	227	.mode = 0644,
6d9f239a	228	.proc_handler = proc_dointvec,
1da177e4 LT	229	},
1da177e4 LT	230	{
e1fc3b14 EB	231	.procname = "rcvbuf_policy",
e1fc3b14 EB	232	.data = &init_net.sctp.rcvbuf_policy,
dd51be0f MH	233	.maxlen = sizeof(int),
	234	.mode = 0644,
	235	.proc_handler = proc_dointvec,
	236	},
	237	{
	238	.procname = "default_auto_asconf",
e1fc3b14	239	.data = &init_net.sctp.default_auto_asconf,
1da177e4 LT	240	.maxlen = sizeof(int),
1da177e4 LT	241	.mode = 0644,
6d9f239a	242	.proc_handler = proc_dointvec,
1da177e4 LT	243	},
1da177e4 LT	244	{
e1fc3b14 EB	245	.procname = "addip_enable",
e1fc3b14 EB	246	.data = &init_net.sctp.addip_enable,
1da177e4 LT	247	.maxlen = sizeof(int),
1da177e4 LT	248	.mode = 0644,
6d9f239a	249	.proc_handler = proc_dointvec,
1da177e4	250	},
2f85a429	251	{
e1fc3b14 EB	252	.procname = "addip_noauth_enable",
e1fc3b14 EB	253	.data = &init_net.sctp.addip_noauth,
d48e074d	254	.maxlen = sizeof(int),
2f85a429	255	.mode = 0644,
6d9f239a	256	.proc_handler = proc_dointvec,
4d93df0a NH	257	},
4d93df0a NH	258	{
e1fc3b14 EB	259	.procname = "prsctp_enable",
e1fc3b14 EB	260	.data = &init_net.sctp.prsctp_enable,
a29a5bd4 VY	261	.maxlen = sizeof(int),
a29a5bd4 VY	262	.mode = 0644,
6d9f239a	263	.proc_handler = proc_dointvec,
a29a5bd4	264	},
c0d8bab6 XL	265	{
	266	.procname = "reconf_enable",
	267	.data = &init_net.sctp.reconf_enable,
	268	.maxlen = sizeof(int),
	269	.mode = 0644,
	270	.proc_handler = proc_dointvec,
	271	},
73d9c4fd	272	{
e1fc3b14 EB	273	.procname = "auth_enable",
e1fc3b14 EB	274	.data = &init_net.sctp.auth_enable,
73d9c4fd VY	275	.maxlen = sizeof(int),
73d9c4fd VY	276	.mode = 0644,
b14878cc	277	.proc_handler = proc_sctp_do_auth,
73d9c4fd	278	},
463118c3 XL	279	{
	280	.procname = "intl_enable",
	281	.data = &init_net.sctp.intl_enable,
	282	.maxlen = sizeof(int),
	283	.mode = 0644,
	284	.proc_handler = proc_dointvec,
	285	},
2f5268a9 XL	286	{
	287	.procname = "ecn_enable",
	288	.data = &init_net.sctp.ecn_enable,
	289	.maxlen = sizeof(int),
	290	.mode = 0644,
	291	.proc_handler = proc_dointvec,
	292	},
72388433	293	{
72388433	294	.procname = "addr_scope_policy",
e1fc3b14	295	.data = &init_net.sctp.scope_policy,
72388433 BD	296	.maxlen = sizeof(int),
72388433 BD	297	.mode = 0644,
6d456111	298	.proc_handler = proc_dointvec_minmax,
eec4844f	299	.extra1 = SYSCTL_ZERO,
72388433 BD	300	.extra2 = &addr_scope_max,
72388433 BD	301	},
90f2f531	302	{
90f2f531	303	.procname = "rwnd_update_shift",
e1fc3b14	304	.data = &init_net.sctp.rwnd_upd_shift,
90f2f531 VY	305	.maxlen = sizeof(int),
	306	.mode = 0644,
	307	.proc_handler = &proc_dointvec_minmax,
eec4844f	308	.extra1 = SYSCTL_ONE,
90f2f531 VY	309	.extra2 = &rwnd_scale_max,
90f2f531 VY	310	},
2692ba61 XW	311	{
2692ba61 XW	312	.procname = "max_autoclose",
e1fc3b14	313	.data = &init_net.sctp.max_autoclose,
2692ba61 XW	314	.maxlen = sizeof(unsigned long),
	315	.mode = 0644,
	316	.proc_handler = &proc_doulongvec_minmax,
	317	.extra1 = &max_autoclose_min,
	318	.extra2 = &max_autoclose_max,
	319	},
566178f8 ZY	320	{
	321	.procname = "pf_enable",
	322	.data = &init_net.sctp.pf_enable,
	323	.maxlen = sizeof(int),
	324	.mode = 0644,
	325	.proc_handler = proc_dointvec,
	326	},
aef587be XL	327	{
	328	.procname = "pf_expose",
	329	.data = &init_net.sctp.pf_expose,
	330	.maxlen = sizeof(int),
	331	.mode = 0644,
	332	.proc_handler = proc_dointvec_minmax,
	333	.extra1 = SYSCTL_ZERO,
	334	.extra2 = &pf_expose_max,
	335	},
71acc0dd	336
d7fc02c7	337	{ /* sentinel */ }
1da177e4 LT	338	};
1da177e4 LT	339
b486b228	340	static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
32927393	341	void buffer, size_t lenp, loff_t *ppos)
3c68198e NH	342	{
3c68198e NH	343	struct net *net = current->nsproxy->net_ns;
fe2c6338	344	struct ctl_table tbl;
ff5e92c1	345	bool changed = false;
3c68198e	346	char *none = "none";
320f1a4a	347	char tmp[8] = {0};
ff5e92c1	348	int ret;
3c68198e NH	349
	350	memset(&tbl, 0, sizeof(struct ctl_table));
	351
	352	if (write) {
	353	tbl.data = tmp;
ff5e92c1	354	tbl.maxlen = sizeof(tmp);
3c68198e NH	355	} else {
	356	tbl.data = net->sctp.sctp_hmac_alg ? : none;
	357	tbl.maxlen = strlen(tbl.data);
	358	}
3c68198e	359
ff5e92c1 DB	360	ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
ff5e92c1 DB	361	if (write && ret == 0) {
3c68198e NH	362	#ifdef CONFIG_CRYPTO_MD5
	363	if (!strncmp(tmp, "md5", 3)) {
	364	net->sctp.sctp_hmac_alg = "md5";
ff5e92c1	365	changed = true;
3c68198e NH	366	}
	367	#endif
	368	#ifdef CONFIG_CRYPTO_SHA1
	369	if (!strncmp(tmp, "sha1", 4)) {
	370	net->sctp.sctp_hmac_alg = "sha1";
ff5e92c1	371	changed = true;
3c68198e NH	372	}
	373	#endif
	374	if (!strncmp(tmp, "none", 4)) {
	375	net->sctp.sctp_hmac_alg = NULL;
ff5e92c1	376	changed = true;
3c68198e	377	}
3c68198e NH	378	if (!changed)
	379	ret = -EINVAL;
	380	}
	381
	382	return ret;
	383	}
	384
4f3fdf3b	385	static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
32927393	386	void buffer, size_t lenp, loff_t *ppos)
4f3fdf3b	387	{
4f3fdf3b	388	struct net *net = current->nsproxy->net_ns;
4f3fdf3b	389	unsigned int min = (unsigned int ) ctl->extra1;
4f3fdf3b	390	unsigned int max = (unsigned int ) ctl->extra2;
ff5e92c1 DB	391	struct ctl_table tbl;
ff5e92c1 DB	392	int ret, new_value;
4f3fdf3b	393
	394	memset(&tbl, 0, sizeof(struct ctl_table));
	395	tbl.maxlen = sizeof(unsigned int);
	396
	397	if (write)
	398	tbl.data = &new_value;
	399	else
	400	tbl.data = &net->sctp.rto_min;
ff5e92c1	401
4f3fdf3b	402	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
ff5e92c1 DB	403	if (write && ret == 0) {
ff5e92c1 DB	404	if (new_value > max \|\| new_value < min)
4f3fdf3b	405	return -EINVAL;
ff5e92c1	406
4f3fdf3b	407	net->sctp.rto_min = new_value;
4f3fdf3b	408	}
ff5e92c1	409
4f3fdf3b	410	return ret;
	411	}
	412
	413	static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
32927393	414	void buffer, size_t lenp, loff_t *ppos)
4f3fdf3b	415	{
4f3fdf3b	416	struct net *net = current->nsproxy->net_ns;
4f3fdf3b	417	unsigned int min = (unsigned int ) ctl->extra1;
4f3fdf3b	418	unsigned int max = (unsigned int ) ctl->extra2;
ff5e92c1 DB	419	struct ctl_table tbl;
ff5e92c1 DB	420	int ret, new_value;
4f3fdf3b	421
	422	memset(&tbl, 0, sizeof(struct ctl_table));
	423	tbl.maxlen = sizeof(unsigned int);
	424
	425	if (write)
	426	tbl.data = &new_value;
	427	else
	428	tbl.data = &net->sctp.rto_max;
ff5e92c1	429
4f3fdf3b	430	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
ff5e92c1 DB	431	if (write && ret == 0) {
ff5e92c1 DB	432	if (new_value > max \|\| new_value < min)
4f3fdf3b	433	return -EINVAL;
ff5e92c1	434
4f3fdf3b	435	net->sctp.rto_max = new_value;
4f3fdf3b	436	}
ff5e92c1	437
4f3fdf3b	438	return ret;
	439	}
	440
b58537a1	441	static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write,
32927393	442	void buffer, size_t lenp, loff_t *ppos)
b58537a1	443	{
eaea2da7 DB	444	if (write)
	445	pr_warn_once("Changing rto_alpha or rto_beta may lead to "
	446	"suboptimal rtt/srtt estimations!\n");
b58537a1 DB	447
	448	return proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
	449	}
	450
b14878cc	451	static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
32927393	452	void buffer, size_t lenp, loff_t *ppos)
b14878cc VY	453	{
	454	struct net *net = current->nsproxy->net_ns;
	455	struct ctl_table tbl;
	456	int new_value, ret;
	457
	458	memset(&tbl, 0, sizeof(struct ctl_table));
	459	tbl.maxlen = sizeof(unsigned int);
	460
	461	if (write)
	462	tbl.data = &new_value;
	463	else
	464	tbl.data = &net->sctp.auth_enable;
	465
	466	ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
24599e61	467	if (write && ret == 0) {
b14878cc VY	468	struct sock *sk = net->sctp.ctl_sock;
	469
	470	net->sctp.auth_enable = new_value;
	471	/* Update the value in the control socket */
	472	lock_sock(sk);
	473	sctp_sk(sk)->ep->auth_enable = new_value;
	474	release_sock(sk);
	475	}
	476
	477	return ret;
	478	}
	479
ebb7e95d EB	480	int sctp_sysctl_net_register(struct net *net)
ebb7e95d EB	481	{
eb9f3705	482	struct ctl_table *table;
eb9f3705	483	int i;
ebb7e95d	484
eb9f3705	485	table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);
	486	if (!table)
	487	return -ENOMEM;
ebb7e95d	488
eb9f3705	489	for (i = 0; table[i].data; i++)
eb9f3705	490	table[i].data += (char )(&net->sctp) - (char )&init_net.sctp;
e1fc3b14	491
ebb7e95d	492	net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table);
f66138c8	493	if (net->sctp.sysctl_header == NULL) {
	494	kfree(table);
	495	return -ENOMEM;
	496	}
ebb7e95d EB	497	return 0;
	498	}
	499
	500	void sctp_sysctl_net_unregister(struct net *net)
	501	{
5f19d121 VY	502	struct ctl_table *table;
	503
	504	table = net->sctp.sysctl_header->ctl_table_arg;
ebb7e95d	505	unregister_net_sysctl_table(net->sctp.sysctl_header);
5f19d121	506	kfree(table);
ebb7e95d EB	507	}
ebb7e95d EB	508
26ac8e5f	509	static struct ctl_table_header *sctp_sysctl_header;
1da177e4 LT	510
	511	/* Sysctl registration. */
	512	void sctp_sysctl_register(void)
	513	{
ec8f23ce	514	sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table);
1da177e4 LT	515	}
	516
	517	/* Sysctl deregistration. */
	518	void sctp_sysctl_unregister(void)
	519	{
5dd3df10	520	unregister_net_sysctl_table(sctp_sysctl_header);
1da177e4	521	}