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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, see
23 * <http://www.gnu.org/licenses/>.
24 *
25 * Please send any bug reports or fixes you make to the
26 * email address(es):
27 * lksctp developers <linux-sctp@vger.kernel.org>
28 *
29 * Written or modified by:
30 * Mingqin Liu <liuming@us.ibm.com>
31 * Jon Grimm <jgrimm@us.ibm.com>
32 * Ardelle Fan <ardelle.fan@intel.com>
33 * Ryan Layer <rmlayer@us.ibm.com>
34 * Sridhar Samudrala <sri@us.ibm.com>
35 */
36
37#include <net/sctp/structs.h>
38#include <net/sctp/sctp.h>
39#include <linux/sysctl.h>
40
41static int zero = 0;
42static int one = 1;
43static int timer_max = 86400000; /* ms in one day */
44static int int_max = INT_MAX;
45static int sack_timer_min = 1;
46static int sack_timer_max = 500;
47static int addr_scope_max = 3; /* check sctp_scope_policy_t in include/net/sctp/constants.h for max entries */
48static int rwnd_scale_max = 16;
49static unsigned long max_autoclose_min = 0;
50static unsigned long max_autoclose_max =
51 (MAX_SCHEDULE_TIMEOUT / HZ > UINT_MAX)
52 ? UINT_MAX : MAX_SCHEDULE_TIMEOUT / HZ;
53
54extern long sysctl_sctp_mem[3];
55extern int sysctl_sctp_rmem[3];
56extern int sysctl_sctp_wmem[3];
57
58static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
59 void __user *buffer, size_t *lenp,
60 loff_t *ppos);
61static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
62 void __user *buffer, size_t *lenp,
63 loff_t *ppos);
64static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
65 void __user *buffer, size_t *lenp,
66 loff_t *ppos);
67static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
68 void __user *buffer, size_t *lenp,
69 loff_t *ppos);
70
71static struct ctl_table sctp_table[] = {
72 {
73 .procname = "sctp_mem",
74 .data = &sysctl_sctp_mem,
75 .maxlen = sizeof(sysctl_sctp_mem),
76 .mode = 0644,
77 .proc_handler = proc_doulongvec_minmax
78 },
79 {
80 .procname = "sctp_rmem",
81 .data = &sysctl_sctp_rmem,
82 .maxlen = sizeof(sysctl_sctp_rmem),
83 .mode = 0644,
84 .proc_handler = proc_dointvec,
85 },
86 {
87 .procname = "sctp_wmem",
88 .data = &sysctl_sctp_wmem,
89 .maxlen = sizeof(sysctl_sctp_wmem),
90 .mode = 0644,
91 .proc_handler = proc_dointvec,
92 },
93
94 { /* sentinel */ }
95};
96
97static struct ctl_table sctp_net_table[] = {
98 {
99 .procname = "rto_initial",
100 .data = &init_net.sctp.rto_initial,
101 .maxlen = sizeof(unsigned int),
102 .mode = 0644,
103 .proc_handler = proc_dointvec_minmax,
104 .extra1 = &one,
105 .extra2 = &timer_max
106 },
107 {
108 .procname = "rto_min",
109 .data = &init_net.sctp.rto_min,
110 .maxlen = sizeof(unsigned int),
111 .mode = 0644,
112 .proc_handler = proc_sctp_do_rto_min,
113 .extra1 = &one,
114 .extra2 = &init_net.sctp.rto_max
115 },
116 {
117 .procname = "rto_max",
118 .data = &init_net.sctp.rto_max,
119 .maxlen = sizeof(unsigned int),
120 .mode = 0644,
121 .proc_handler = proc_sctp_do_rto_max,
122 .extra1 = &init_net.sctp.rto_min,
123 .extra2 = &timer_max
124 },
125 {
126 .procname = "rto_alpha_exp_divisor",
127 .data = &init_net.sctp.rto_alpha,
128 .maxlen = sizeof(int),
129 .mode = 0444,
130 .proc_handler = proc_dointvec,
131 },
132 {
133 .procname = "rto_beta_exp_divisor",
134 .data = &init_net.sctp.rto_beta,
135 .maxlen = sizeof(int),
136 .mode = 0444,
137 .proc_handler = proc_dointvec,
138 },
139 {
140 .procname = "max_burst",
141 .data = &init_net.sctp.max_burst,
142 .maxlen = sizeof(int),
143 .mode = 0644,
144 .proc_handler = proc_dointvec_minmax,
145 .extra1 = &zero,
146 .extra2 = &int_max
147 },
148 {
149 .procname = "cookie_preserve_enable",
150 .data = &init_net.sctp.cookie_preserve_enable,
151 .maxlen = sizeof(int),
152 .mode = 0644,
153 .proc_handler = proc_dointvec,
154 },
155 {
156 .procname = "cookie_hmac_alg",
157 .data = &init_net.sctp.sctp_hmac_alg,
158 .maxlen = 8,
159 .mode = 0644,
160 .proc_handler = proc_sctp_do_hmac_alg,
161 },
162 {
163 .procname = "valid_cookie_life",
164 .data = &init_net.sctp.valid_cookie_life,
165 .maxlen = sizeof(unsigned int),
166 .mode = 0644,
167 .proc_handler = proc_dointvec_minmax,
168 .extra1 = &one,
169 .extra2 = &timer_max
170 },
171 {
172 .procname = "sack_timeout",
173 .data = &init_net.sctp.sack_timeout,
174 .maxlen = sizeof(int),
175 .mode = 0644,
176 .proc_handler = proc_dointvec_minmax,
177 .extra1 = &sack_timer_min,
178 .extra2 = &sack_timer_max,
179 },
180 {
181 .procname = "hb_interval",
182 .data = &init_net.sctp.hb_interval,
183 .maxlen = sizeof(unsigned int),
184 .mode = 0644,
185 .proc_handler = proc_dointvec_minmax,
186 .extra1 = &one,
187 .extra2 = &timer_max
188 },
189 {
190 .procname = "association_max_retrans",
191 .data = &init_net.sctp.max_retrans_association,
192 .maxlen = sizeof(int),
193 .mode = 0644,
194 .proc_handler = proc_dointvec_minmax,
195 .extra1 = &one,
196 .extra2 = &int_max
197 },
198 {
199 .procname = "path_max_retrans",
200 .data = &init_net.sctp.max_retrans_path,
201 .maxlen = sizeof(int),
202 .mode = 0644,
203 .proc_handler = proc_dointvec_minmax,
204 .extra1 = &one,
205 .extra2 = &int_max
206 },
207 {
208 .procname = "max_init_retransmits",
209 .data = &init_net.sctp.max_retrans_init,
210 .maxlen = sizeof(int),
211 .mode = 0644,
212 .proc_handler = proc_dointvec_minmax,
213 .extra1 = &one,
214 .extra2 = &int_max
215 },
216 {
217 .procname = "pf_retrans",
218 .data = &init_net.sctp.pf_retrans,
219 .maxlen = sizeof(int),
220 .mode = 0644,
221 .proc_handler = proc_dointvec_minmax,
222 .extra1 = &zero,
223 .extra2 = &int_max
224 },
225 {
226 .procname = "sndbuf_policy",
227 .data = &init_net.sctp.sndbuf_policy,
228 .maxlen = sizeof(int),
229 .mode = 0644,
230 .proc_handler = proc_dointvec,
231 },
232 {
233 .procname = "rcvbuf_policy",
234 .data = &init_net.sctp.rcvbuf_policy,
235 .maxlen = sizeof(int),
236 .mode = 0644,
237 .proc_handler = proc_dointvec,
238 },
239 {
240 .procname = "default_auto_asconf",
241 .data = &init_net.sctp.default_auto_asconf,
242 .maxlen = sizeof(int),
243 .mode = 0644,
244 .proc_handler = proc_dointvec,
245 },
246 {
247 .procname = "addip_enable",
248 .data = &init_net.sctp.addip_enable,
249 .maxlen = sizeof(int),
250 .mode = 0644,
251 .proc_handler = proc_dointvec,
252 },
253 {
254 .procname = "addip_noauth_enable",
255 .data = &init_net.sctp.addip_noauth,
256 .maxlen = sizeof(int),
257 .mode = 0644,
258 .proc_handler = proc_dointvec,
259 },
260 {
261 .procname = "prsctp_enable",
262 .data = &init_net.sctp.prsctp_enable,
263 .maxlen = sizeof(int),
264 .mode = 0644,
265 .proc_handler = proc_dointvec,
266 },
267 {
268 .procname = "auth_enable",
269 .data = &init_net.sctp.auth_enable,
270 .maxlen = sizeof(int),
271 .mode = 0644,
272 .proc_handler = proc_sctp_do_auth,
273 },
274 {
275 .procname = "addr_scope_policy",
276 .data = &init_net.sctp.scope_policy,
277 .maxlen = sizeof(int),
278 .mode = 0644,
279 .proc_handler = proc_dointvec_minmax,
280 .extra1 = &zero,
281 .extra2 = &addr_scope_max,
282 },
283 {
284 .procname = "rwnd_update_shift",
285 .data = &init_net.sctp.rwnd_upd_shift,
286 .maxlen = sizeof(int),
287 .mode = 0644,
288 .proc_handler = &proc_dointvec_minmax,
289 .extra1 = &one,
290 .extra2 = &rwnd_scale_max,
291 },
292 {
293 .procname = "max_autoclose",
294 .data = &init_net.sctp.max_autoclose,
295 .maxlen = sizeof(unsigned long),
296 .mode = 0644,
297 .proc_handler = &proc_doulongvec_minmax,
298 .extra1 = &max_autoclose_min,
299 .extra2 = &max_autoclose_max,
300 },
301
302 { /* sentinel */ }
303};
304
305static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
306 void __user *buffer, size_t *lenp,
307 loff_t *ppos)
308{
309 struct net *net = current->nsproxy->net_ns;
310 char tmp[8];
311 struct ctl_table tbl;
312 int ret;
313 int changed = 0;
314 char *none = "none";
315
316 memset(&tbl, 0, sizeof(struct ctl_table));
317
318 if (write) {
319 tbl.data = tmp;
320 tbl.maxlen = 8;
321 } else {
322 tbl.data = net->sctp.sctp_hmac_alg ? : none;
323 tbl.maxlen = strlen(tbl.data);
324 }
325 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
326
327 if (write) {
328#ifdef CONFIG_CRYPTO_MD5
329 if (!strncmp(tmp, "md5", 3)) {
330 net->sctp.sctp_hmac_alg = "md5";
331 changed = 1;
332 }
333#endif
334#ifdef CONFIG_CRYPTO_SHA1
335 if (!strncmp(tmp, "sha1", 4)) {
336 net->sctp.sctp_hmac_alg = "sha1";
337 changed = 1;
338 }
339#endif
340 if (!strncmp(tmp, "none", 4)) {
341 net->sctp.sctp_hmac_alg = NULL;
342 changed = 1;
343 }
344
345 if (!changed)
346 ret = -EINVAL;
347 }
348
349 return ret;
350}
351
352static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
353 void __user *buffer, size_t *lenp,
354 loff_t *ppos)
355{
356 struct net *net = current->nsproxy->net_ns;
357 int new_value;
358 struct ctl_table tbl;
359 unsigned int min = *(unsigned int *) ctl->extra1;
360 unsigned int max = *(unsigned int *) ctl->extra2;
361 int ret;
362
363 memset(&tbl, 0, sizeof(struct ctl_table));
364 tbl.maxlen = sizeof(unsigned int);
365
366 if (write)
367 tbl.data = &new_value;
368 else
369 tbl.data = &net->sctp.rto_min;
370 ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
371 if (write) {
372 if (ret || new_value > max || new_value < min)
373 return -EINVAL;
374 net->sctp.rto_min = new_value;
375 }
376 return ret;
377}
378
379static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
380 void __user *buffer, size_t *lenp,
381 loff_t *ppos)
382{
383 struct net *net = current->nsproxy->net_ns;
384 int new_value;
385 struct ctl_table tbl;
386 unsigned int min = *(unsigned int *) ctl->extra1;
387 unsigned int max = *(unsigned int *) ctl->extra2;
388 int ret;
389
390 memset(&tbl, 0, sizeof(struct ctl_table));
391 tbl.maxlen = sizeof(unsigned int);
392
393 if (write)
394 tbl.data = &new_value;
395 else
396 tbl.data = &net->sctp.rto_max;
397 ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
398 if (write) {
399 if (ret || new_value > max || new_value < min)
400 return -EINVAL;
401 net->sctp.rto_max = new_value;
402 }
403 return ret;
404}
405
406static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
407 void __user *buffer, size_t *lenp,
408 loff_t *ppos)
409{
410 struct net *net = current->nsproxy->net_ns;
411 struct ctl_table tbl;
412 int new_value, ret;
413
414 memset(&tbl, 0, sizeof(struct ctl_table));
415 tbl.maxlen = sizeof(unsigned int);
416
417 if (write)
418 tbl.data = &new_value;
419 else
420 tbl.data = &net->sctp.auth_enable;
421
422 ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
423
424 if (write) {
425 struct sock *sk = net->sctp.ctl_sock;
426
427 net->sctp.auth_enable = new_value;
428 /* Update the value in the control socket */
429 lock_sock(sk);
430 sctp_sk(sk)->ep->auth_enable = new_value;
431 release_sock(sk);
432 }
433
434 return ret;
435}
436
437int sctp_sysctl_net_register(struct net *net)
438{
439 struct ctl_table *table = sctp_net_table;
440
441 if (!net_eq(net, &init_net)) {
442 int i;
443
444 table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);
445 if (!table)
446 return -ENOMEM;
447
448 for (i = 0; table[i].data; i++)
449 table[i].data += (char *)(&net->sctp) - (char *)&init_net.sctp;
450 }
451
452 net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table);
453 return 0;
454}
455
456void sctp_sysctl_net_unregister(struct net *net)
457{
458 struct ctl_table *table;
459
460 table = net->sctp.sysctl_header->ctl_table_arg;
461 unregister_net_sysctl_table(net->sctp.sysctl_header);
462 kfree(table);
463}
464
465static struct ctl_table_header *sctp_sysctl_header;
466
467/* Sysctl registration. */
468void sctp_sysctl_register(void)
469{
470 sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table);
471}
472
473/* Sysctl deregistration. */
474void sctp_sysctl_unregister(void)
475{
476 unregister_net_sysctl_table(sctp_sysctl_header);
477}
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
48static int zero = 0;
49static int one = 1;
50static int timer_max = 86400000; /* ms in one day */
51static int int_max = INT_MAX;
52static int sack_timer_min = 1;
53static int sack_timer_max = 500;
54static int addr_scope_max = 3; /* check sctp_scope_policy_t in include/net/sctp/constants.h for max entries */
55static int rwnd_scale_max = 16;
56static unsigned long max_autoclose_min = 0;
57static unsigned long max_autoclose_max =
58 (MAX_SCHEDULE_TIMEOUT / HZ > UINT_MAX)
59 ? UINT_MAX : MAX_SCHEDULE_TIMEOUT / HZ;
60
61extern long sysctl_sctp_mem[3];
62extern int sysctl_sctp_rmem[3];
63extern int sysctl_sctp_wmem[3];
64
65static 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 = "max_init_retransmits",
145 .data = &sctp_max_retrans_init,
146 .maxlen = sizeof(int),
147 .mode = 0644,
148 .proc_handler = proc_dointvec_minmax,
149 .extra1 = &one,
150 .extra2 = &int_max
151 },
152 {
153 .procname = "hb_interval",
154 .data = &sctp_hb_interval,
155 .maxlen = sizeof(unsigned int),
156 .mode = 0644,
157 .proc_handler = proc_dointvec_minmax,
158 .extra1 = &one,
159 .extra2 = &timer_max
160 },
161 {
162 .procname = "cookie_preserve_enable",
163 .data = &sctp_cookie_preserve_enable,
164 .maxlen = sizeof(int),
165 .mode = 0644,
166 .proc_handler = proc_dointvec,
167 },
168 {
169 .procname = "rto_alpha_exp_divisor",
170 .data = &sctp_rto_alpha,
171 .maxlen = sizeof(int),
172 .mode = 0444,
173 .proc_handler = proc_dointvec,
174 },
175 {
176 .procname = "rto_beta_exp_divisor",
177 .data = &sctp_rto_beta,
178 .maxlen = sizeof(int),
179 .mode = 0444,
180 .proc_handler = proc_dointvec,
181 },
182 {
183 .procname = "addip_enable",
184 .data = &sctp_addip_enable,
185 .maxlen = sizeof(int),
186 .mode = 0644,
187 .proc_handler = proc_dointvec,
188 },
189 {
190 .procname = "default_auto_asconf",
191 .data = &sctp_default_auto_asconf,
192 .maxlen = sizeof(int),
193 .mode = 0644,
194 .proc_handler = proc_dointvec,
195 },
196 {
197 .procname = "prsctp_enable",
198 .data = &sctp_prsctp_enable,
199 .maxlen = sizeof(int),
200 .mode = 0644,
201 .proc_handler = proc_dointvec,
202 },
203 {
204 .procname = "sack_timeout",
205 .data = &sctp_sack_timeout,
206 .maxlen = sizeof(int),
207 .mode = 0644,
208 .proc_handler = proc_dointvec_minmax,
209 .extra1 = &sack_timer_min,
210 .extra2 = &sack_timer_max,
211 },
212 {
213 .procname = "sctp_mem",
214 .data = &sysctl_sctp_mem,
215 .maxlen = sizeof(sysctl_sctp_mem),
216 .mode = 0644,
217 .proc_handler = proc_doulongvec_minmax
218 },
219 {
220 .procname = "sctp_rmem",
221 .data = &sysctl_sctp_rmem,
222 .maxlen = sizeof(sysctl_sctp_rmem),
223 .mode = 0644,
224 .proc_handler = proc_dointvec,
225 },
226 {
227 .procname = "sctp_wmem",
228 .data = &sysctl_sctp_wmem,
229 .maxlen = sizeof(sysctl_sctp_wmem),
230 .mode = 0644,
231 .proc_handler = proc_dointvec,
232 },
233 {
234 .procname = "auth_enable",
235 .data = &sctp_auth_enable,
236 .maxlen = sizeof(int),
237 .mode = 0644,
238 .proc_handler = proc_dointvec,
239 },
240 {
241 .procname = "addip_noauth_enable",
242 .data = &sctp_addip_noauth,
243 .maxlen = sizeof(int),
244 .mode = 0644,
245 .proc_handler = proc_dointvec,
246 },
247 {
248 .procname = "addr_scope_policy",
249 .data = &sctp_scope_policy,
250 .maxlen = sizeof(int),
251 .mode = 0644,
252 .proc_handler = proc_dointvec_minmax,
253 .extra1 = &zero,
254 .extra2 = &addr_scope_max,
255 },
256 {
257 .procname = "rwnd_update_shift",
258 .data = &sctp_rwnd_upd_shift,
259 .maxlen = sizeof(int),
260 .mode = 0644,
261 .proc_handler = &proc_dointvec_minmax,
262 .extra1 = &one,
263 .extra2 = &rwnd_scale_max,
264 },
265 {
266 .procname = "max_autoclose",
267 .data = &sctp_max_autoclose,
268 .maxlen = sizeof(unsigned long),
269 .mode = 0644,
270 .proc_handler = &proc_doulongvec_minmax,
271 .extra1 = &max_autoclose_min,
272 .extra2 = &max_autoclose_max,
273 },
274
275 { /* sentinel */ }
276};
277
278static struct ctl_table_header * sctp_sysctl_header;
279
280/* Sysctl registration. */
281void sctp_sysctl_register(void)
282{
283 sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table);
284}
285
286/* Sysctl deregistration. */
287void sctp_sysctl_unregister(void)
288{
289 unregister_net_sysctl_table(sctp_sysctl_header);
290}