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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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>
45#include <linux/sysctl.h>
46
47static ctl_handler sctp_sysctl_jiffies_ms;
48static long rto_timer_min = 1;
49static long rto_timer_max = 86400000; /* One day */
Vlad Yasevich2f85a422005-06-28 13:24:23 -070050static long sack_timer_min = 1;
51static long sack_timer_max = 500;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53static ctl_table sctp_table[] = {
54 {
55 .ctl_name = NET_SCTP_RTO_INITIAL,
56 .procname = "rto_initial",
57 .data = &sctp_rto_initial,
58 .maxlen = sizeof(long),
59 .mode = 0644,
60 .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
61 .strategy = &sctp_sysctl_jiffies_ms,
62 .extra1 = &rto_timer_min,
63 .extra2 = &rto_timer_max
64 },
65 {
66 .ctl_name = NET_SCTP_RTO_MIN,
67 .procname = "rto_min",
68 .data = &sctp_rto_min,
69 .maxlen = sizeof(long),
70 .mode = 0644,
71 .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
72 .strategy = &sctp_sysctl_jiffies_ms,
73 .extra1 = &rto_timer_min,
74 .extra2 = &rto_timer_max
75 },
76 {
77 .ctl_name = NET_SCTP_RTO_MAX,
78 .procname = "rto_max",
79 .data = &sctp_rto_max,
80 .maxlen = sizeof(long),
81 .mode = 0644,
82 .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
83 .strategy = &sctp_sysctl_jiffies_ms,
84 .extra1 = &rto_timer_min,
85 .extra2 = &rto_timer_max
86 },
87 {
88 .ctl_name = NET_SCTP_VALID_COOKIE_LIFE,
89 .procname = "valid_cookie_life",
90 .data = &sctp_valid_cookie_life,
91 .maxlen = sizeof(long),
92 .mode = 0644,
93 .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
94 .strategy = &sctp_sysctl_jiffies_ms,
95 .extra1 = &rto_timer_min,
96 .extra2 = &rto_timer_max
97 },
98 {
99 .ctl_name = NET_SCTP_MAX_BURST,
100 .procname = "max_burst",
101 .data = &sctp_max_burst,
102 .maxlen = sizeof(int),
103 .mode = 0644,
104 .proc_handler = &proc_dointvec
105 },
106 {
107 .ctl_name = NET_SCTP_ASSOCIATION_MAX_RETRANS,
108 .procname = "association_max_retrans",
109 .data = &sctp_max_retrans_association,
110 .maxlen = sizeof(int),
111 .mode = 0644,
112 .proc_handler = &proc_dointvec
113 },
114 {
Neil Horman4eb701d2005-04-28 12:02:04 -0700115 .ctl_name = NET_SCTP_SNDBUF_POLICY,
116 .procname = "sndbuf_policy",
117 .data = &sctp_sndbuf_policy,
118 .maxlen = sizeof(int),
119 .mode = 0644,
120 .proc_handler = &proc_dointvec
121 },
122 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 .ctl_name = NET_SCTP_PATH_MAX_RETRANS,
124 .procname = "path_max_retrans",
125 .data = &sctp_max_retrans_path,
126 .maxlen = sizeof(int),
127 .mode = 0644,
128 .proc_handler = &proc_dointvec
129 },
130 {
131 .ctl_name = NET_SCTP_MAX_INIT_RETRANSMITS,
132 .procname = "max_init_retransmits",
133 .data = &sctp_max_retrans_init,
134 .maxlen = sizeof(int),
135 .mode = 0644,
136 .proc_handler = &proc_dointvec
137 },
138 {
139 .ctl_name = NET_SCTP_HB_INTERVAL,
140 .procname = "hb_interval",
141 .data = &sctp_hb_interval,
142 .maxlen = sizeof(long),
143 .mode = 0644,
144 .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
145 .strategy = &sctp_sysctl_jiffies_ms,
146 .extra1 = &rto_timer_min,
147 .extra2 = &rto_timer_max
148 },
149 {
150 .ctl_name = NET_SCTP_PRESERVE_ENABLE,
151 .procname = "cookie_preserve_enable",
152 .data = &sctp_cookie_preserve_enable,
153 .maxlen = sizeof(long),
154 .mode = 0644,
155 .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
156 .strategy = &sctp_sysctl_jiffies_ms,
157 .extra1 = &rto_timer_min,
158 .extra2 = &rto_timer_max
159 },
160 {
161 .ctl_name = NET_SCTP_RTO_ALPHA,
162 .procname = "rto_alpha_exp_divisor",
163 .data = &sctp_rto_alpha,
164 .maxlen = sizeof(int),
165 .mode = 0644,
166 .proc_handler = &proc_dointvec
167 },
168 {
169 .ctl_name = NET_SCTP_RTO_BETA,
170 .procname = "rto_beta_exp_divisor",
171 .data = &sctp_rto_beta,
172 .maxlen = sizeof(int),
173 .mode = 0644,
174 .proc_handler = &proc_dointvec
175 },
176 {
177 .ctl_name = NET_SCTP_ADDIP_ENABLE,
178 .procname = "addip_enable",
179 .data = &sctp_addip_enable,
180 .maxlen = sizeof(int),
181 .mode = 0644,
182 .proc_handler = &proc_dointvec
183 },
184 {
185 .ctl_name = NET_SCTP_PRSCTP_ENABLE,
186 .procname = "prsctp_enable",
187 .data = &sctp_prsctp_enable,
188 .maxlen = sizeof(int),
189 .mode = 0644,
190 .proc_handler = &proc_dointvec
191 },
Vlad Yasevich2f85a422005-06-28 13:24:23 -0700192 {
193 .ctl_name = NET_SCTP_SACK_TIMEOUT,
194 .procname = "sack_timeout",
195 .data = &sctp_sack_timeout,
196 .maxlen = sizeof(long),
197 .mode = 0644,
198 .proc_handler = &proc_doulongvec_ms_jiffies_minmax,
199 .strategy = &sctp_sysctl_jiffies_ms,
200 .extra1 = &sack_timer_min,
201 .extra2 = &sack_timer_max,
202 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 { .ctl_name = 0 }
204};
205
206static ctl_table sctp_net_table[] = {
207 {
208 .ctl_name = NET_SCTP,
209 .procname = "sctp",
210 .mode = 0555,
211 .child = sctp_table
212 },
213 { .ctl_name = 0 }
214};
215
216static ctl_table sctp_root_table[] = {
217 {
218 .ctl_name = CTL_NET,
219 .procname = "net",
220 .mode = 0555,
221 .child = sctp_net_table
222 },
223 { .ctl_name = 0 }
224};
225
226static struct ctl_table_header * sctp_sysctl_header;
227
228/* Sysctl registration. */
229void sctp_sysctl_register(void)
230{
231 sctp_sysctl_header = register_sysctl_table(sctp_root_table, 0);
232}
233
234/* Sysctl deregistration. */
235void sctp_sysctl_unregister(void)
236{
237 unregister_sysctl_table(sctp_sysctl_header);
238}
239
240/* Strategy function to convert jiffies to milliseconds. */
241static int sctp_sysctl_jiffies_ms(ctl_table *table, int __user *name, int nlen,
242 void __user *oldval, size_t __user *oldlenp,
243 void __user *newval, size_t newlen, void **context) {
244
245 if (oldval) {
246 size_t olen;
247
248 if (oldlenp) {
249 if (get_user(olen, oldlenp))
250 return -EFAULT;
251
252 if (olen != sizeof (int))
253 return -EINVAL;
254 }
255 if (put_user((*(int *)(table->data) * 1000) / HZ,
256 (int __user *)oldval) ||
257 (oldlenp && put_user(sizeof (int), oldlenp)))
258 return -EFAULT;
259 }
260 if (newval && newlen) {
261 int new;
262
263 if (newlen != sizeof (int))
264 return -EINVAL;
265
266 if (get_user(new, (int __user *)newval))
267 return -EFAULT;
268
269 *(int *)(table->data) = (new * HZ) / 1000;
270 }
271 return 1;
272}