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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 | static unsigned long max_autoclose_min = 0; | |
57 | static unsigned long max_autoclose_max = | |
58 | (MAX_SCHEDULE_TIMEOUT / HZ > UINT_MAX) | |
59 | ? UINT_MAX : MAX_SCHEDULE_TIMEOUT / HZ; | |
60 | ||
61 | extern long sysctl_sctp_mem[3]; | |
62 | extern int sysctl_sctp_rmem[3]; | |
63 | extern int sysctl_sctp_wmem[3]; | |
64 | ||
65 | static ctl_table sctp_table[] = { | |
66 | { | |
67 | .procname = "rto_initial", | |
68 | .data = &sctp_rto_initial, | |
69 | .maxlen = sizeof(unsigned int), | |
70 | .mode = 0644, | |
71 | .proc_handler = proc_dointvec_minmax, | |
72 | .extra1 = &one, | |
73 | .extra2 = &timer_max | |
74 | }, | |
75 | { | |
76 | .procname = "rto_min", | |
77 | .data = &sctp_rto_min, | |
78 | .maxlen = sizeof(unsigned int), | |
79 | .mode = 0644, | |
80 | .proc_handler = proc_dointvec_minmax, | |
81 | .extra1 = &one, | |
82 | .extra2 = &timer_max | |
83 | }, | |
84 | { | |
85 | .procname = "rto_max", | |
86 | .data = &sctp_rto_max, | |
87 | .maxlen = sizeof(unsigned int), | |
88 | .mode = 0644, | |
89 | .proc_handler = proc_dointvec_minmax, | |
90 | .extra1 = &one, | |
91 | .extra2 = &timer_max | |
92 | }, | |
93 | { | |
94 | .procname = "valid_cookie_life", | |
95 | .data = &sctp_valid_cookie_life, | |
96 | .maxlen = sizeof(unsigned int), | |
97 | .mode = 0644, | |
98 | .proc_handler = proc_dointvec_minmax, | |
99 | .extra1 = &one, | |
100 | .extra2 = &timer_max | |
101 | }, | |
102 | { | |
103 | .procname = "max_burst", | |
104 | .data = &sctp_max_burst, | |
105 | .maxlen = sizeof(int), | |
106 | .mode = 0644, | |
107 | .proc_handler = proc_dointvec_minmax, | |
108 | .extra1 = &zero, | |
109 | .extra2 = &int_max | |
110 | }, | |
111 | { | |
112 | .procname = "association_max_retrans", | |
113 | .data = &sctp_max_retrans_association, | |
114 | .maxlen = sizeof(int), | |
115 | .mode = 0644, | |
116 | .proc_handler = proc_dointvec_minmax, | |
117 | .extra1 = &one, | |
118 | .extra2 = &int_max | |
119 | }, | |
120 | { | |
121 | .procname = "sndbuf_policy", | |
122 | .data = &sctp_sndbuf_policy, | |
123 | .maxlen = sizeof(int), | |
124 | .mode = 0644, | |
125 | .proc_handler = proc_dointvec, | |
126 | }, | |
127 | { | |
128 | .procname = "rcvbuf_policy", | |
129 | .data = &sctp_rcvbuf_policy, | |
130 | .maxlen = sizeof(int), | |
131 | .mode = 0644, | |
132 | .proc_handler = proc_dointvec, | |
133 | }, | |
134 | { | |
135 | .procname = "path_max_retrans", | |
136 | .data = &sctp_max_retrans_path, | |
137 | .maxlen = sizeof(int), | |
138 | .mode = 0644, | |
139 | .proc_handler = proc_dointvec_minmax, | |
140 | .extra1 = &one, | |
141 | .extra2 = &int_max | |
142 | }, | |
143 | { | |
144 | .procname = "pf_retrans", | |
145 | .data = &sctp_pf_retrans, | |
146 | .maxlen = sizeof(int), | |
147 | .mode = 0644, | |
148 | .proc_handler = proc_dointvec_minmax, | |
149 | .extra1 = &zero, | |
150 | .extra2 = &int_max | |
151 | }, | |
152 | { | |
153 | .procname = "max_init_retransmits", | |
154 | .data = &sctp_max_retrans_init, | |
155 | .maxlen = sizeof(int), | |
156 | .mode = 0644, | |
157 | .proc_handler = proc_dointvec_minmax, | |
158 | .extra1 = &one, | |
159 | .extra2 = &int_max | |
160 | }, | |
161 | { | |
162 | .procname = "hb_interval", | |
163 | .data = &sctp_hb_interval, | |
164 | .maxlen = sizeof(unsigned int), | |
165 | .mode = 0644, | |
166 | .proc_handler = proc_dointvec_minmax, | |
167 | .extra1 = &one, | |
168 | .extra2 = &timer_max | |
169 | }, | |
170 | { | |
171 | .procname = "cookie_preserve_enable", | |
172 | .data = &sctp_cookie_preserve_enable, | |
173 | .maxlen = sizeof(int), | |
174 | .mode = 0644, | |
175 | .proc_handler = proc_dointvec, | |
176 | }, | |
177 | { | |
178 | .procname = "rto_alpha_exp_divisor", | |
179 | .data = &sctp_rto_alpha, | |
180 | .maxlen = sizeof(int), | |
181 | .mode = 0444, | |
182 | .proc_handler = proc_dointvec, | |
183 | }, | |
184 | { | |
185 | .procname = "rto_beta_exp_divisor", | |
186 | .data = &sctp_rto_beta, | |
187 | .maxlen = sizeof(int), | |
188 | .mode = 0444, | |
189 | .proc_handler = proc_dointvec, | |
190 | }, | |
191 | { | |
192 | .procname = "addip_enable", | |
193 | .data = &sctp_addip_enable, | |
194 | .maxlen = sizeof(int), | |
195 | .mode = 0644, | |
196 | .proc_handler = proc_dointvec, | |
197 | }, | |
198 | { | |
199 | .procname = "default_auto_asconf", | |
200 | .data = &sctp_default_auto_asconf, | |
201 | .maxlen = sizeof(int), | |
202 | .mode = 0644, | |
203 | .proc_handler = proc_dointvec, | |
204 | }, | |
205 | { | |
206 | .procname = "prsctp_enable", | |
207 | .data = &sctp_prsctp_enable, | |
208 | .maxlen = sizeof(int), | |
209 | .mode = 0644, | |
210 | .proc_handler = proc_dointvec, | |
211 | }, | |
212 | { | |
213 | .procname = "sack_timeout", | |
214 | .data = &sctp_sack_timeout, | |
215 | .maxlen = sizeof(int), | |
216 | .mode = 0644, | |
217 | .proc_handler = proc_dointvec_minmax, | |
218 | .extra1 = &sack_timer_min, | |
219 | .extra2 = &sack_timer_max, | |
220 | }, | |
221 | { | |
222 | .procname = "sctp_mem", | |
223 | .data = &sysctl_sctp_mem, | |
224 | .maxlen = sizeof(sysctl_sctp_mem), | |
225 | .mode = 0644, | |
226 | .proc_handler = proc_doulongvec_minmax | |
227 | }, | |
228 | { | |
229 | .procname = "sctp_rmem", | |
230 | .data = &sysctl_sctp_rmem, | |
231 | .maxlen = sizeof(sysctl_sctp_rmem), | |
232 | .mode = 0644, | |
233 | .proc_handler = proc_dointvec, | |
234 | }, | |
235 | { | |
236 | .procname = "sctp_wmem", | |
237 | .data = &sysctl_sctp_wmem, | |
238 | .maxlen = sizeof(sysctl_sctp_wmem), | |
239 | .mode = 0644, | |
240 | .proc_handler = proc_dointvec, | |
241 | }, | |
242 | { | |
243 | .procname = "auth_enable", | |
244 | .data = &sctp_auth_enable, | |
245 | .maxlen = sizeof(int), | |
246 | .mode = 0644, | |
247 | .proc_handler = proc_dointvec, | |
248 | }, | |
249 | { | |
250 | .procname = "addip_noauth_enable", | |
251 | .data = &sctp_addip_noauth, | |
252 | .maxlen = sizeof(int), | |
253 | .mode = 0644, | |
254 | .proc_handler = proc_dointvec, | |
255 | }, | |
256 | { | |
257 | .procname = "addr_scope_policy", | |
258 | .data = &sctp_scope_policy, | |
259 | .maxlen = sizeof(int), | |
260 | .mode = 0644, | |
261 | .proc_handler = proc_dointvec_minmax, | |
262 | .extra1 = &zero, | |
263 | .extra2 = &addr_scope_max, | |
264 | }, | |
265 | { | |
266 | .procname = "rwnd_update_shift", | |
267 | .data = &sctp_rwnd_upd_shift, | |
268 | .maxlen = sizeof(int), | |
269 | .mode = 0644, | |
270 | .proc_handler = &proc_dointvec_minmax, | |
271 | .extra1 = &one, | |
272 | .extra2 = &rwnd_scale_max, | |
273 | }, | |
274 | { | |
275 | .procname = "max_autoclose", | |
276 | .data = &sctp_max_autoclose, | |
277 | .maxlen = sizeof(unsigned long), | |
278 | .mode = 0644, | |
279 | .proc_handler = &proc_doulongvec_minmax, | |
280 | .extra1 = &max_autoclose_min, | |
281 | .extra2 = &max_autoclose_max, | |
282 | }, | |
283 | ||
284 | { /* sentinel */ } | |
285 | }; | |
286 | ||
287 | static ctl_table sctp_net_table[] = { | |
288 | { /* sentinel */ } | |
289 | }; | |
290 | ||
291 | int sctp_sysctl_net_register(struct net *net) | |
292 | { | |
293 | struct ctl_table *table; | |
294 | ||
295 | table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL); | |
296 | if (!table) | |
297 | return -ENOMEM; | |
298 | ||
299 | net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table); | |
300 | return 0; | |
301 | } | |
302 | ||
303 | void sctp_sysctl_net_unregister(struct net *net) | |
304 | { | |
305 | unregister_net_sysctl_table(net->sctp.sysctl_header); | |
306 | } | |
307 | ||
308 | static struct ctl_table_header * sctp_sysctl_header; | |
309 | ||
310 | /* Sysctl registration. */ | |
311 | void sctp_sysctl_register(void) | |
312 | { | |
313 | sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table); | |
314 | } | |
315 | ||
316 | /* Sysctl deregistration. */ | |
317 | void sctp_sysctl_unregister(void) | |
318 | { | |
319 | unregister_net_sysctl_table(sctp_sysctl_header); | |
320 | } |