6b3952961b858369d8a63b908b0911357a9e28e7
[linux-2.6.git] / net / sctp / sysctl.c
1 /* SCTP kernel implementation
2  * (C) Copyright IBM Corp. 2002, 2004
3  * Copyright (c) 2002 Intel Corp.
4  *
5  * This file is part of the SCTP kernel implementation
6  *
7  * Sysctl related interfaces for SCTP.
8  *
9  * This SCTP 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  * This SCTP 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 <net/sctp/sctp.h>
46 #include <linux/sysctl.h>
47
48 static int zero = 0;
49 static int one = 1;
50 static int timer_max = 86400000; /* ms in one day */
51 static int int_max = INT_MAX;
52 static int sack_timer_min = 1;
53 static int sack_timer_max = 500;
54 static int addr_scope_max = 3; /* check sctp_scope_policy_t in include/net/sctp/constants.h for max entries */
55 static int rwnd_scale_max = 16;
56
57 extern long sysctl_sctp_mem[3];
58 extern int sysctl_sctp_rmem[3];
59 extern int sysctl_sctp_wmem[3];
60
61 static ctl_table sctp_table[] = {
62         {
63                 .procname       = "rto_initial",
64                 .data           = &sctp_rto_initial,
65                 .maxlen         = sizeof(unsigned int),
66                 .mode           = 0644,
67                 .proc_handler   = proc_dointvec_minmax,
68                 .extra1         = &one,
69                 .extra2         = &timer_max
70         },
71         {
72                 .procname       = "rto_min",
73                 .data           = &sctp_rto_min,
74                 .maxlen         = sizeof(unsigned int),
75                 .mode           = 0644,
76                 .proc_handler   = proc_dointvec_minmax,
77                 .extra1         = &one,
78                 .extra2         = &timer_max
79         },
80         {
81                 .procname       = "rto_max",
82                 .data           = &sctp_rto_max,
83                 .maxlen         = sizeof(unsigned int),
84                 .mode           = 0644,
85                 .proc_handler   = proc_dointvec_minmax,
86                 .extra1         = &one,
87                 .extra2         = &timer_max
88         },
89         {
90                 .procname       = "valid_cookie_life",
91                 .data           = &sctp_valid_cookie_life,
92                 .maxlen         = sizeof(unsigned int),
93                 .mode           = 0644,
94                 .proc_handler   = proc_dointvec_minmax,
95                 .extra1         = &one,
96                 .extra2         = &timer_max
97         },
98         {
99                 .procname       = "max_burst",
100                 .data           = &sctp_max_burst,
101                 .maxlen         = sizeof(int),
102                 .mode           = 0644,
103                 .proc_handler   = proc_dointvec_minmax,
104                 .extra1         = &zero,
105                 .extra2         = &int_max
106         },
107         {
108                 .procname       = "association_max_retrans",
109                 .data           = &sctp_max_retrans_association,
110                 .maxlen         = sizeof(int),
111                 .mode           = 0644,
112                 .proc_handler   = proc_dointvec_minmax,
113                 .extra1         = &one,
114                 .extra2         = &int_max
115         },
116         {
117                 .procname       = "sndbuf_policy",
118                 .data           = &sctp_sndbuf_policy,
119                 .maxlen         = sizeof(int),
120                 .mode           = 0644,
121                 .proc_handler   = proc_dointvec,
122         },
123         {
124                 .procname       = "rcvbuf_policy",
125                 .data           = &sctp_rcvbuf_policy,
126                 .maxlen         = sizeof(int),
127                 .mode           = 0644,
128                 .proc_handler   = proc_dointvec,
129         },
130         {
131                 .procname       = "path_max_retrans",
132                 .data           = &sctp_max_retrans_path,
133                 .maxlen         = sizeof(int),
134                 .mode           = 0644,
135                 .proc_handler   = proc_dointvec_minmax,
136                 .extra1         = &one,
137                 .extra2         = &int_max
138         },
139         {
140                 .procname       = "max_init_retransmits",
141                 .data           = &sctp_max_retrans_init,
142                 .maxlen         = sizeof(int),
143                 .mode           = 0644,
144                 .proc_handler   = proc_dointvec_minmax,
145                 .extra1         = &one,
146                 .extra2         = &int_max
147         },
148         {
149                 .procname       = "hb_interval",
150                 .data           = &sctp_hb_interval,
151                 .maxlen         = sizeof(unsigned int),
152                 .mode           = 0644,
153                 .proc_handler   = proc_dointvec_minmax,
154                 .extra1         = &one,
155                 .extra2         = &timer_max
156         },
157         {
158                 .procname       = "cookie_preserve_enable",
159                 .data           = &sctp_cookie_preserve_enable,
160                 .maxlen         = sizeof(int),
161                 .mode           = 0644,
162                 .proc_handler   = proc_dointvec,
163         },
164         {
165                 .procname       = "rto_alpha_exp_divisor",
166                 .data           = &sctp_rto_alpha,
167                 .maxlen         = sizeof(int),
168                 .mode           = 0444,
169                 .proc_handler   = proc_dointvec,
170         },
171         {
172                 .procname       = "rto_beta_exp_divisor",
173                 .data           = &sctp_rto_beta,
174                 .maxlen         = sizeof(int),
175                 .mode           = 0444,
176                 .proc_handler   = proc_dointvec,
177         },
178         {
179                 .procname       = "addip_enable",
180                 .data           = &sctp_addip_enable,
181                 .maxlen         = sizeof(int),
182                 .mode           = 0644,
183                 .proc_handler   = proc_dointvec,
184         },
185         {
186                 .procname       = "default_auto_asconf",
187                 .data           = &sctp_default_auto_asconf,
188                 .maxlen         = sizeof(int),
189                 .mode           = 0644,
190                 .proc_handler   = proc_dointvec,
191         },
192         {
193                 .procname       = "prsctp_enable",
194                 .data           = &sctp_prsctp_enable,
195                 .maxlen         = sizeof(int),
196                 .mode           = 0644,
197                 .proc_handler   = proc_dointvec,
198         },
199         {
200                 .procname       = "sack_timeout",
201                 .data           = &sctp_sack_timeout,
202                 .maxlen         = sizeof(int),
203                 .mode           = 0644,
204                 .proc_handler   = proc_dointvec_minmax,
205                 .extra1         = &sack_timer_min,
206                 .extra2         = &sack_timer_max,
207         },
208         {
209                 .procname       = "sctp_mem",
210                 .data           = &sysctl_sctp_mem,
211                 .maxlen         = sizeof(sysctl_sctp_mem),
212                 .mode           = 0644,
213                 .proc_handler   = proc_doulongvec_minmax
214         },
215         {
216                 .procname       = "sctp_rmem",
217                 .data           = &sysctl_sctp_rmem,
218                 .maxlen         = sizeof(sysctl_sctp_rmem),
219                 .mode           = 0644,
220                 .proc_handler   = proc_dointvec,
221         },
222         {
223                 .procname       = "sctp_wmem",
224                 .data           = &sysctl_sctp_wmem,
225                 .maxlen         = sizeof(sysctl_sctp_wmem),
226                 .mode           = 0644,
227                 .proc_handler   = proc_dointvec,
228         },
229         {
230                 .procname       = "auth_enable",
231                 .data           = &sctp_auth_enable,
232                 .maxlen         = sizeof(int),
233                 .mode           = 0644,
234                 .proc_handler   = proc_dointvec,
235         },
236         {
237                 .procname       = "addip_noauth_enable",
238                 .data           = &sctp_addip_noauth,
239                 .maxlen         = sizeof(int),
240                 .mode           = 0644,
241                 .proc_handler   = proc_dointvec,
242         },
243         {
244                 .procname       = "addr_scope_policy",
245                 .data           = &sctp_scope_policy,
246                 .maxlen         = sizeof(int),
247                 .mode           = 0644,
248                 .proc_handler   = proc_dointvec_minmax,
249                 .extra1         = &zero,
250                 .extra2         = &addr_scope_max,
251         },
252         {
253                 .procname       = "rwnd_update_shift",
254                 .data           = &sctp_rwnd_upd_shift,
255                 .maxlen         = sizeof(int),
256                 .mode           = 0644,
257                 .proc_handler   = &proc_dointvec_minmax,
258                 .extra1         = &one,
259                 .extra2         = &rwnd_scale_max,
260         },
261
262         { /* sentinel */ }
263 };
264
265 static struct ctl_path sctp_path[] = {
266         { .procname = "net", },
267         { .procname = "sctp", },
268         { }
269 };
270
271 static struct ctl_table_header * sctp_sysctl_header;
272
273 /* Sysctl registration.  */
274 void sctp_sysctl_register(void)
275 {
276         sctp_sysctl_header = register_sysctl_paths(sctp_path, sctp_table);
277 }
278
279 /* Sysctl deregistration.  */
280 void sctp_sysctl_unregister(void)
281 {
282         unregister_sysctl_table(sctp_sysctl_header);
283 }