[mirror_ubuntu-bionic-kernel.git] / net / sctp / sysctl.c

/* SCTP kernel reference Implementation
 * (C) Copyright IBM Corp. 2002, 2004
 * Copyright (c) 2002 Intel Corp.
 *
 * This file is part of the SCTP kernel reference Implementation
 *
 * Sysctl related interfaces for SCTP.
 *
 * The SCTP reference 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.
 *
 * The SCTP reference implementation is distributed in the hope that it
 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
 *                 ************************
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU CC; see the file COPYING.  If not, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Please send any bug reports or fixes you make to the
 * email address(es):
 *    lksctp developers <lksctp-developers@lists.sourceforge.net>
 *
 * Or submit a bug report through the following website:
 *    http://www.sf.net/projects/lksctp
 *
 * 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>
 *
 * Any bugs reported given to us we will try to fix... any fixes shared will
 * be incorporated into the next SCTP release.
 */

#include <net/sctp/structs.h>
#include <net/sctp/sctp.h>
#include <linux/sysctl.h>

static ctl_handler sctp_sysctl_jiffies_ms;
static long rto_timer_min = 1;
static long rto_timer_max = 86400000; /* One day */
static long sack_timer_min = 1;
static long sack_timer_max = 500;

static ctl_table sctp_table[] = {
	{
		.ctl_name	= NET_SCTP_RTO_INITIAL,
		.procname	= "rto_initial",
		.data		= &sctp_rto_initial,
		.maxlen		= sizeof(long),
		.mode		= 0644,
		.proc_handler	= &proc_doulongvec_ms_jiffies_minmax,
		.strategy	= &sctp_sysctl_jiffies_ms,
		.extra1         = &rto_timer_min,
		.extra2         = &rto_timer_max
	},
	{
		.ctl_name	= NET_SCTP_RTO_MIN,
		.procname	= "rto_min",
		.data		= &sctp_rto_min,
		.maxlen		= sizeof(long),
		.mode		= 0644,
		.proc_handler	= &proc_doulongvec_ms_jiffies_minmax,
		.strategy	= &sctp_sysctl_jiffies_ms,
		.extra1         = &rto_timer_min,
		.extra2         = &rto_timer_max
	},
	{
		.ctl_name	= NET_SCTP_RTO_MAX,
		.procname	= "rto_max",
		.data		= &sctp_rto_max,
		.maxlen		= sizeof(long),
		.mode		= 0644,
		.proc_handler	= &proc_doulongvec_ms_jiffies_minmax,
		.strategy	= &sctp_sysctl_jiffies_ms,
		.extra1         = &rto_timer_min,
		.extra2         = &rto_timer_max
	},
	{
		.ctl_name	= NET_SCTP_VALID_COOKIE_LIFE,
		.procname	= "valid_cookie_life",
		.data		= &sctp_valid_cookie_life,
		.maxlen		= sizeof(long),
		.mode		= 0644,
		.proc_handler	= &proc_doulongvec_ms_jiffies_minmax,
		.strategy	= &sctp_sysctl_jiffies_ms,
		.extra1         = &rto_timer_min,
		.extra2         = &rto_timer_max
	},
	{
		.ctl_name	= NET_SCTP_MAX_BURST,
		.procname	= "max_burst",
		.data		= &sctp_max_burst,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_SCTP_ASSOCIATION_MAX_RETRANS,
		.procname	= "association_max_retrans",
		.data		= &sctp_max_retrans_association,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_SCTP_SNDBUF_POLICY,
		.procname	= "sndbuf_policy",
		.data		= &sctp_sndbuf_policy,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_SCTP_RCVBUF_POLICY,
		.procname	= "rcvbuf_policy",
		.data		= &sctp_rcvbuf_policy,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_SCTP_PATH_MAX_RETRANS,
		.procname	= "path_max_retrans",
		.data		= &sctp_max_retrans_path,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_SCTP_MAX_INIT_RETRANSMITS,
		.procname	= "max_init_retransmits",
		.data		= &sctp_max_retrans_init,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_SCTP_HB_INTERVAL,
		.procname	= "hb_interval",
		.data		= &sctp_hb_interval,
		.maxlen		= sizeof(long),
		.mode		= 0644,
		.proc_handler	= &proc_doulongvec_ms_jiffies_minmax,
		.strategy	= &sctp_sysctl_jiffies_ms,
		.extra1         = &rto_timer_min,
		.extra2         = &rto_timer_max
	},
	{
		.ctl_name	= NET_SCTP_PRESERVE_ENABLE,
		.procname	= "cookie_preserve_enable",
		.data		= &sctp_cookie_preserve_enable,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_SCTP_RTO_ALPHA,
		.procname	= "rto_alpha_exp_divisor",
		.data		= &sctp_rto_alpha,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_SCTP_RTO_BETA,
		.procname	= "rto_beta_exp_divisor",
		.data		= &sctp_rto_beta,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_SCTP_ADDIP_ENABLE,
		.procname	= "addip_enable",
		.data		= &sctp_addip_enable,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_SCTP_PRSCTP_ENABLE,
		.procname	= "prsctp_enable",
		.data		= &sctp_prsctp_enable,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
	{
		.ctl_name	= NET_SCTP_SACK_TIMEOUT,
		.procname	= "sack_timeout",
		.data		= &sctp_sack_timeout,
		.maxlen		= sizeof(long),
		.mode		= 0644,
		.proc_handler	= &proc_doulongvec_ms_jiffies_minmax,
		.strategy	= &sctp_sysctl_jiffies_ms,
		.extra1         = &sack_timer_min,
		.extra2         = &sack_timer_max,
	},
	{ .ctl_name = 0 }
};

static ctl_table sctp_net_table[] = {
	{
		.ctl_name	= NET_SCTP,
		.procname	= "sctp",
		.mode		= 0555,
		.child		= sctp_table
	},
	{ .ctl_name = 0 }
};

static ctl_table sctp_root_table[] = {
	{
		.ctl_name	= CTL_NET,
		.procname	= "net",
		.mode		= 0555,
		.child		= sctp_net_table
	},
	{ .ctl_name = 0 }
};

static struct ctl_table_header * sctp_sysctl_header;

/* Sysctl registration.  */
void sctp_sysctl_register(void)
{
	sctp_sysctl_header = register_sysctl_table(sctp_root_table, 0);
}

/* Sysctl deregistration.  */
void sctp_sysctl_unregister(void)
{
	unregister_sysctl_table(sctp_sysctl_header);
}

/* Strategy function to convert jiffies to milliseconds.  */
static int sctp_sysctl_jiffies_ms(ctl_table *table, int __user *name, int nlen,
		void __user *oldval, size_t __user *oldlenp,
		void __user *newval, size_t newlen, void **context) {

	if (oldval) {
		size_t olen;

		if (oldlenp) {
			if (get_user(olen, oldlenp))
				return -EFAULT;

			if (olen != sizeof (int))
				return -EINVAL;
		}
		if (put_user((*(int *)(table->data) * 1000) / HZ,
			(int __user *)oldval) ||
		    (oldlenp && put_user(sizeof (int), oldlenp)))
			return -EFAULT;
	}
	if (newval && newlen) {
		int new;

		if (newlen != sizeof (int))
			return -EINVAL;

		if (get_user(new, (int __user *)newval))
			return -EFAULT;

		*(int *)(table->data) = (new * HZ) / 1000;
	}
	return 1;
}
Commit	Line	Data
1da177e4 LT	1	/* SCTP kernel reference Implementation
	2	* (C) Copyright IBM Corp. 2002, 2004
	3	* Copyright (c) 2002 Intel Corp.
	4	*
	5	* This file is part of the SCTP kernel reference Implementation
	6	*
	7	* Sysctl related interfaces for SCTP.
	8	*
	9	* The SCTP reference implementation is free software;
	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	*
	15	* The SCTP reference implementation is distributed in the hope that it
	16	* will be useful, but WITHOUT ANY WARRANTY; without even the implied
	17	* ************************
	18	* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	19	* See the GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with GNU CC; see the file COPYING. If not, write to
	23	* the Free Software Foundation, 59 Temple Place - Suite 330,
	24	* Boston, MA 02111-1307, USA.
	25	*
	26	* Please send any bug reports or fixes you make to the
	27	* email address(es):
	28	* lksctp developers <lksctp-developers@lists.sourceforge.net>
	29	*
	30	* Or submit a bug report through the following website:
	31	* http://www.sf.net/projects/lksctp
	32	*
	33	* Written or modified by:
	34	* Mingqin Liu <liuming@us.ibm.com>
	35	* Jon Grimm <jgrimm@us.ibm.com>
	36	* Ardelle Fan <ardelle.fan@intel.com>
	37	* Ryan Layer <rmlayer@us.ibm.com>
	38	* Sridhar Samudrala <sri@us.ibm.com>
	39	*
	40	* Any bugs reported given to us we will try to fix... any fixes shared will
	41	* be incorporated into the next SCTP release.
	42	*/
	43
	44	#include <net/sctp/structs.h>
8c5955d8	45	#include <net/sctp/sctp.h>
1da177e4 LT	46	#include <linux/sysctl.h>
	47
	48	static ctl_handler sctp_sysctl_jiffies_ms;
	49	static long rto_timer_min = 1;
	50	static long rto_timer_max = 86400000; /* One day */
2f85a429 VY	51	static long sack_timer_min = 1;
2f85a429 VY	52	static long sack_timer_max = 500;
1da177e4 LT	53
	54	static ctl_table sctp_table[] = {
	55	{
	56	.ctl_name = NET_SCTP_RTO_INITIAL,
	57	.procname = "rto_initial",
	58	.data = &sctp_rto_initial,
	59	.maxlen = sizeof(long),
	60	.mode = 0644,
	61	.proc_handler = &proc_doulongvec_ms_jiffies_minmax,
	62	.strategy = &sctp_sysctl_jiffies_ms,
	63	.extra1 = &rto_timer_min,
	64	.extra2 = &rto_timer_max
	65	},
	66	{
	67	.ctl_name = NET_SCTP_RTO_MIN,
	68	.procname = "rto_min",
	69	.data = &sctp_rto_min,
	70	.maxlen = sizeof(long),
	71	.mode = 0644,
	72	.proc_handler = &proc_doulongvec_ms_jiffies_minmax,
	73	.strategy = &sctp_sysctl_jiffies_ms,
	74	.extra1 = &rto_timer_min,
	75	.extra2 = &rto_timer_max
	76	},
	77	{
	78	.ctl_name = NET_SCTP_RTO_MAX,
	79	.procname = "rto_max",
	80	.data = &sctp_rto_max,
	81	.maxlen = sizeof(long),
	82	.mode = 0644,
	83	.proc_handler = &proc_doulongvec_ms_jiffies_minmax,
	84	.strategy = &sctp_sysctl_jiffies_ms,
	85	.extra1 = &rto_timer_min,
	86	.extra2 = &rto_timer_max
	87	},
	88	{
	89	.ctl_name = NET_SCTP_VALID_COOKIE_LIFE,
	90	.procname = "valid_cookie_life",
	91	.data = &sctp_valid_cookie_life,
	92	.maxlen = sizeof(long),
	93	.mode = 0644,
	94	.proc_handler = &proc_doulongvec_ms_jiffies_minmax,
	95	.strategy = &sctp_sysctl_jiffies_ms,
	96	.extra1 = &rto_timer_min,
	97	.extra2 = &rto_timer_max
	98	},
	99	{
	100	.ctl_name = NET_SCTP_MAX_BURST,
	101	.procname = "max_burst",
	102	.data = &sctp_max_burst,
	103	.maxlen = sizeof(int),
	104	.mode = 0644,
	105	.proc_handler = &proc_dointvec
	106	},
	107	{
	108	.ctl_name = NET_SCTP_ASSOCIATION_MAX_RETRANS,
	109	.procname = "association_max_retrans",
	110	.data = &sctp_max_retrans_association,
	111	.maxlen = sizeof(int),
	112	.mode = 0644,
	113	.proc_handler = &proc_dointvec
	114	},
4eb701df NH	115	{
	116	.ctl_name = NET_SCTP_SNDBUF_POLICY,
	117	.procname = "sndbuf_policy",
	118	.data = &sctp_sndbuf_policy,
	119	.maxlen = sizeof(int),
	120	.mode = 0644,
	121	.proc_handler = &proc_dointvec
	122	},
049b3ff5 NH	123	{
	124	.ctl_name = NET_SCTP_RCVBUF_POLICY,
	125	.procname = "rcvbuf_policy",
	126	.data = &sctp_rcvbuf_policy,
	127	.maxlen = sizeof(int),
	128	.mode = 0644,
	129	.proc_handler = &proc_dointvec
	130	},
1da177e4 LT	131	{
	132	.ctl_name = NET_SCTP_PATH_MAX_RETRANS,
	133	.procname = "path_max_retrans",
	134	.data = &sctp_max_retrans_path,
	135	.maxlen = sizeof(int),
	136	.mode = 0644,
	137	.proc_handler = &proc_dointvec
	138	},
	139	{
	140	.ctl_name = NET_SCTP_MAX_INIT_RETRANSMITS,
	141	.procname = "max_init_retransmits",
	142	.data = &sctp_max_retrans_init,
	143	.maxlen = sizeof(int),
	144	.mode = 0644,
	145	.proc_handler = &proc_dointvec
	146	},
	147	{
	148	.ctl_name = NET_SCTP_HB_INTERVAL,
	149	.procname = "hb_interval",
	150	.data = &sctp_hb_interval,
	151	.maxlen = sizeof(long),
	152	.mode = 0644,
	153	.proc_handler = &proc_doulongvec_ms_jiffies_minmax,
	154	.strategy = &sctp_sysctl_jiffies_ms,
	155	.extra1 = &rto_timer_min,
	156	.extra2 = &rto_timer_max
	157	},
	158	{
	159	.ctl_name = NET_SCTP_PRESERVE_ENABLE,
	160	.procname = "cookie_preserve_enable",
	161	.data = &sctp_cookie_preserve_enable,
8116ffad	162	.maxlen = sizeof(int),
1da177e4	163	.mode = 0644,
8116ffad	164	.proc_handler = &proc_dointvec
1da177e4 LT	165	},
	166	{
	167	.ctl_name = NET_SCTP_RTO_ALPHA,
	168	.procname = "rto_alpha_exp_divisor",
	169	.data = &sctp_rto_alpha,
	170	.maxlen = sizeof(int),
	171	.mode = 0644,
	172	.proc_handler = &proc_dointvec
	173	},
	174	{
	175	.ctl_name = NET_SCTP_RTO_BETA,
	176	.procname = "rto_beta_exp_divisor",
	177	.data = &sctp_rto_beta,
	178	.maxlen = sizeof(int),
	179	.mode = 0644,
	180	.proc_handler = &proc_dointvec
	181	},
	182	{
	183	.ctl_name = NET_SCTP_ADDIP_ENABLE,
	184	.procname = "addip_enable",
	185	.data = &sctp_addip_enable,
	186	.maxlen = sizeof(int),
	187	.mode = 0644,
	188	.proc_handler = &proc_dointvec
	189	},
	190	{
	191	.ctl_name = NET_SCTP_PRSCTP_ENABLE,
	192	.procname = "prsctp_enable",
	193	.data = &sctp_prsctp_enable,
	194	.maxlen = sizeof(int),
	195	.mode = 0644,
	196	.proc_handler = &proc_dointvec
	197	},
2f85a429 VY	198	{
	199	.ctl_name = NET_SCTP_SACK_TIMEOUT,
	200	.procname = "sack_timeout",
	201	.data = &sctp_sack_timeout,
	202	.maxlen = sizeof(long),
	203	.mode = 0644,
	204	.proc_handler = &proc_doulongvec_ms_jiffies_minmax,
	205	.strategy = &sctp_sysctl_jiffies_ms,
	206	.extra1 = &sack_timer_min,
	207	.extra2 = &sack_timer_max,
	208	},
1da177e4 LT	209	{ .ctl_name = 0 }
	210	};
	211
	212	static ctl_table sctp_net_table[] = {
	213	{
	214	.ctl_name = NET_SCTP,
	215	.procname = "sctp",
	216	.mode = 0555,
	217	.child = sctp_table
	218	},
	219	{ .ctl_name = 0 }
	220	};
	221
	222	static ctl_table sctp_root_table[] = {
	223	{
	224	.ctl_name = CTL_NET,
	225	.procname = "net",
	226	.mode = 0555,
	227	.child = sctp_net_table
	228	},
	229	{ .ctl_name = 0 }
	230	};
	231
	232	static struct ctl_table_header * sctp_sysctl_header;
	233
	234	/* Sysctl registration. */
	235	void sctp_sysctl_register(void)
	236	{
	237	sctp_sysctl_header = register_sysctl_table(sctp_root_table, 0);
	238	}
	239
	240	/* Sysctl deregistration. */
	241	void sctp_sysctl_unregister(void)
	242	{
	243	unregister_sysctl_table(sctp_sysctl_header);
	244	}
	245
	246	/* Strategy function to convert jiffies to milliseconds. */
	247	static int sctp_sysctl_jiffies_ms(ctl_table table, int __user name, int nlen,
	248	void __user oldval, size_t __user oldlenp,
	249	void __user newval, size_t newlen, void *context) {
	250
	251	if (oldval) {
	252	size_t olen;
	253
	254	if (oldlenp) {
	255	if (get_user(olen, oldlenp))
	256	return -EFAULT;
	257
	258	if (olen != sizeof (int))
	259	return -EINVAL;
	260	}
	261	if (put_user(((int )(table->data) * 1000) / HZ,
	262	(int __user *)oldval) \|\|
	263	(oldlenp && put_user(sizeof (int), oldlenp)))
	264	return -EFAULT;
	265	}
	266	if (newval && newlen) {
	267	int new;
	268
	269	if (newlen != sizeof (int))
	270	return -EINVAL;
	271
	272	if (get_user(new, (int __user *)newval))
273	return -EFAULT;
274
275	(int )(table->data) = (new * HZ) / 1000;
276	}
277	return 1;
278	}