projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge remote-tracking branches 'asoc/topic/prefix' and 'asoc/topic/rcar' into asoc...
[linux-2.6-block.git] / net / sctp / sysctl.c
CommitLineData
60c778b2 1/* SCTP kernel implementation
1da177e4
LT		 2 * (C) Copyright IBM Corp. 2002, 2004
3 * Copyright (c) 2002 Intel Corp.
4 *
60c778b2 5 * This file is part of the SCTP kernel implementation
1da177e4
LT		 6 *
7 * Sysctl related interfaces for SCTP.
8 *
60c778b2 9 * This SCTP implementation is free software;
1da177e4
LT		 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 *
60c778b2 15 * This SCTP implementation is distributed in the hope that it
1da177e4
LT		 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
4b2f13a2
JK		 22 * along with GNU CC; see the file COPYING. If not, see
23 * <http://www.gnu.org/licenses/>.
1da177e4
LT		 24 *
25 * Please send any bug reports or fixes you make to the
26 * email address(es):
91705c61 27 * lksctp developers <linux-sctp@vger.kernel.org>
1da177e4 28 *
1da177e4
LT		 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>
1da177e4
LT		 35 */
36
37#include <net/sctp/structs.h>
8c5955d8 38#include <net/sctp/sctp.h>
1da177e4
LT		 39#include <linux/sysctl.h>
40
3fd091e7
VY		 41static int zero = 0;
42static int one = 1;
43static int timer_max = 86400000; /* ms in one day */
44static int int_max = INT_MAX;
d48e074d
JMG		 45static int sack_timer_min = 1;
46static int sack_timer_max = 500;
72388433 47static int addr_scope_max = 3; /* check sctp_scope_policy_t in include/net/sctp/constants.h for max entries */
90f2f531 48static int rwnd_scale_max = 16;
2692ba61
XW		 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;
1da177e4 53
8d987e5c 54extern long sysctl_sctp_mem[3];
007e3936
VY		 55extern int sysctl_sctp_rmem[3];
56extern int sysctl_sctp_wmem[3];
4d93df0a 57
b486b228 58static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
3c68198e 59 void __user *buffer, size_t *lenp,
3c68198e 60 loff_t *ppos);
4f3fdf3b 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,
3c68198e 65 void __user *buffer, size_t *lenp,
3c68198e 66 loff_t *ppos);
4f3fdf3b 67
fe2c6338 68static struct ctl_table sctp_table[] = {
e1fc3b14
EB		 69 {
70 .procname = "sctp_mem",
71 .data = &sysctl_sctp_mem,
72 .maxlen = sizeof(sysctl_sctp_mem),
73 .mode = 0644,
74 .proc_handler = proc_doulongvec_minmax
75 },
76 {
77 .procname = "sctp_rmem",
78 .data = &sysctl_sctp_rmem,
79 .maxlen = sizeof(sysctl_sctp_rmem),
80 .mode = 0644,
81 .proc_handler = proc_dointvec,
82 },
83 {
84 .procname = "sctp_wmem",
85 .data = &sysctl_sctp_wmem,
86 .maxlen = sizeof(sysctl_sctp_wmem),
87 .mode = 0644,
88 .proc_handler = proc_dointvec,
89 },
90
91 { /* sentinel */ }
92};
93
fe2c6338 94static struct ctl_table sctp_net_table[] = {
1da177e4 95 {
1da177e4 96 .procname = "rto_initial",
e1fc3b14 97 .data = &init_net.sctp.rto_initial,
3fd091e7 98 .maxlen = sizeof(unsigned int),
1da177e4 99 .mode = 0644,
6d9f239a 100 .proc_handler = proc_dointvec_minmax,
3fd091e7
VY		 101 .extra1 = &one,
102 .extra2 = &timer_max
1da177e4
LT		 103 },
104 {
1da177e4 105 .procname = "rto_min",
e1fc3b14 106 .data = &init_net.sctp.rto_min,
3fd091e7 107 .maxlen = sizeof(unsigned int),
1da177e4 108 .mode = 0644,
4f3fdf3b 109 .proc_handler = proc_sctp_do_rto_min,
3fd091e7 110 .extra1 = &one,
4f3fdf3b 111 .extra2 = &init_net.sctp.rto_max
1da177e4
LT		 112 },
113 {
1da177e4 114 .procname = "rto_max",
e1fc3b14 115 .data = &init_net.sctp.rto_max,
3fd091e7 116 .maxlen = sizeof(unsigned int),
1da177e4 117 .mode = 0644,
4f3fdf3b 118 .proc_handler = proc_sctp_do_rto_max,
119 .extra1 = &init_net.sctp.rto_min,
3fd091e7 120 .extra2 = &timer_max
1da177e4
LT		 121 },
122 {
e1fc3b14
EB		 123 .procname = "rto_alpha_exp_divisor",
124 .data = &init_net.sctp.rto_alpha,
125 .maxlen = sizeof(int),
126 .mode = 0444,
127 .proc_handler = proc_dointvec,
128 },
129 {
130 .procname = "rto_beta_exp_divisor",
131 .data = &init_net.sctp.rto_beta,
132 .maxlen = sizeof(int),
133 .mode = 0444,
134 .proc_handler = proc_dointvec,
1da177e4
LT		 135 },
136 {
1da177e4 137 .procname = "max_burst",
e1fc3b14 138 .data = &init_net.sctp.max_burst,
1da177e4
LT		 139 .maxlen = sizeof(int),
140 .mode = 0644,
6d9f239a 141 .proc_handler = proc_dointvec_minmax,
3fd091e7
VY		 142 .extra1 = &zero,
143 .extra2 = &int_max
1da177e4
LT		 144 },
145 {
e1fc3b14
EB		 146 .procname = "cookie_preserve_enable",
147 .data = &init_net.sctp.cookie_preserve_enable,
1da177e4
LT		 148 .maxlen = sizeof(int),
149 .mode = 0644,
e1fc3b14
EB		 150 .proc_handler = proc_dointvec,
151 },
3c68198e
NH		 152 {
153 .procname = "cookie_hmac_alg",
22a1f514 154 .data = &init_net.sctp.sctp_hmac_alg,
3c68198e
NH		 155 .maxlen = 8,
156 .mode = 0644,
157 .proc_handler = proc_sctp_do_hmac_alg,
158 },
e1fc3b14
EB		 159 {
160 .procname = "valid_cookie_life",
161 .data = &init_net.sctp.valid_cookie_life,
162 .maxlen = sizeof(unsigned int),
163 .mode = 0644,
6d9f239a 164 .proc_handler = proc_dointvec_minmax,
e1fc3b14
EB		 165 .extra1 = &one,
166 .extra2 = &timer_max
1da177e4 167 },
4eb701df 168 {
e1fc3b14
EB		 169 .procname = "sack_timeout",
170 .data = &init_net.sctp.sack_timeout,
4eb701df
NH		 171 .maxlen = sizeof(int),
172 .mode = 0644,
e1fc3b14
EB		 173 .proc_handler = proc_dointvec_minmax,
174 .extra1 = &sack_timer_min,
175 .extra2 = &sack_timer_max,
4eb701df 176 },
049b3ff5 177 {
e1fc3b14
EB		 178 .procname = "hb_interval",
179 .data = &init_net.sctp.hb_interval,
180 .maxlen = sizeof(unsigned int),
049b3ff5 181 .mode = 0644,
e1fc3b14
EB		 182 .proc_handler = proc_dointvec_minmax,
183 .extra1 = &one,
184 .extra2 = &timer_max
049b3ff5 185 },
1da177e4 186 {
e1fc3b14
EB		 187 .procname = "association_max_retrans",
188 .data = &init_net.sctp.max_retrans_association,
1da177e4
LT		 189 .maxlen = sizeof(int),
190 .mode = 0644,
6d9f239a 191 .proc_handler = proc_dointvec_minmax,
3fd091e7
VY		 192 .extra1 = &one,
193 .extra2 = &int_max
1da177e4 194 },
5aa93bcf 195 {
e1fc3b14
EB		 196 .procname = "path_max_retrans",
197 .data = &init_net.sctp.max_retrans_path,
5aa93bcf
NH		 198 .maxlen = sizeof(int),
199 .mode = 0644,
200 .proc_handler = proc_dointvec_minmax,
e1fc3b14 201 .extra1 = &one,
5aa93bcf
NH		 202 .extra2 = &int_max
203 },
1da177e4 204 {
1da177e4 205 .procname = "max_init_retransmits",
e1fc3b14 206 .data = &init_net.sctp.max_retrans_init,
1da177e4
LT		 207 .maxlen = sizeof(int),
208 .mode = 0644,
6d9f239a 209 .proc_handler = proc_dointvec_minmax,
3fd091e7
VY		 210 .extra1 = &one,
211 .extra2 = &int_max
1da177e4
LT		 212 },
213 {
e1fc3b14
EB		 214 .procname = "pf_retrans",
215 .data = &init_net.sctp.pf_retrans,
216 .maxlen = sizeof(int),
1da177e4 217 .mode = 0644,
6d9f239a 218 .proc_handler = proc_dointvec_minmax,
e1fc3b14
EB		 219 .extra1 = &zero,
220 .extra2 = &int_max
1da177e4
LT		 221 },
222 {
e1fc3b14
EB		 223 .procname = "sndbuf_policy",
224 .data = &init_net.sctp.sndbuf_policy,
8116ffad 225 .maxlen = sizeof(int),
1da177e4 226 .mode = 0644,
6d9f239a 227 .proc_handler = proc_dointvec,
1da177e4
LT		 228 },
229 {
e1fc3b14
EB		 230 .procname = "rcvbuf_policy",
231 .data = &init_net.sctp.rcvbuf_policy,
dd51be0f
MH		 232 .maxlen = sizeof(int),
233 .mode = 0644,
234 .proc_handler = proc_dointvec,
235 },
236 {
237 .procname = "default_auto_asconf",
e1fc3b14 238 .data = &init_net.sctp.default_auto_asconf,
1da177e4
LT		 239 .maxlen = sizeof(int),
240 .mode = 0644,
6d9f239a 241 .proc_handler = proc_dointvec,
1da177e4
LT		 242 },
243 {
e1fc3b14
EB		 244 .procname = "addip_enable",
245 .data = &init_net.sctp.addip_enable,
1da177e4
LT		 246 .maxlen = sizeof(int),
247 .mode = 0644,
6d9f239a 248 .proc_handler = proc_dointvec,
1da177e4 249 },
2f85a429 250 {
e1fc3b14
EB		 251 .procname = "addip_noauth_enable",
252 .data = &init_net.sctp.addip_noauth,
d48e074d 253 .maxlen = sizeof(int),
2f85a429 254 .mode = 0644,
6d9f239a 255 .proc_handler = proc_dointvec,
4d93df0a
NH		 256 },
257 {
e1fc3b14
EB		 258 .procname = "prsctp_enable",
259 .data = &init_net.sctp.prsctp_enable,
a29a5bd4
VY		 260 .maxlen = sizeof(int),
261 .mode = 0644,
6d9f239a 262 .proc_handler = proc_dointvec,
a29a5bd4 263 },
73d9c4fd 264 {
e1fc3b14
EB		 265 .procname = "auth_enable",
266 .data = &init_net.sctp.auth_enable,
73d9c4fd
VY		 267 .maxlen = sizeof(int),
268 .mode = 0644,
6d9f239a 269 .proc_handler = proc_dointvec,
73d9c4fd 270 },
72388433 271 {
72388433 272 .procname = "addr_scope_policy",
e1fc3b14 273 .data = &init_net.sctp.scope_policy,
72388433
BD		 274 .maxlen = sizeof(int),
275 .mode = 0644,
6d456111 276 .proc_handler = proc_dointvec_minmax,
72388433
BD		 277 .extra1 = &zero,
278 .extra2 = &addr_scope_max,
279 },
90f2f531 280 {
90f2f531 281 .procname = "rwnd_update_shift",
e1fc3b14 282 .data = &init_net.sctp.rwnd_upd_shift,
90f2f531
VY		 283 .maxlen = sizeof(int),
284 .mode = 0644,
285 .proc_handler = &proc_dointvec_minmax,
90f2f531
VY		 286 .extra1 = &one,
287 .extra2 = &rwnd_scale_max,
288 },
2692ba61
XW		 289 {
290 .procname = "max_autoclose",
e1fc3b14 291 .data = &init_net.sctp.max_autoclose,
2692ba61
XW		 292 .maxlen = sizeof(unsigned long),
293 .mode = 0644,
294 .proc_handler = &proc_doulongvec_minmax,
295 .extra1 = &max_autoclose_min,
296 .extra2 = &max_autoclose_max,
297 },
71acc0dd 298
d7fc02c7 299 { /* sentinel */ }
1da177e4
LT		 300};
301
b486b228 302static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write,
3c68198e
NH		 303 void __user *buffer, size_t *lenp,
304 loff_t *ppos)
305{
306 struct net *net = current->nsproxy->net_ns;
307 char tmp[8];
fe2c6338 308 struct ctl_table tbl;
3c68198e
NH		 309 int ret;
310 int changed = 0;
311 char *none = "none";
312
313 memset(&tbl, 0, sizeof(struct ctl_table));
314
315 if (write) {
316 tbl.data = tmp;
317 tbl.maxlen = 8;
318 } else {
319 tbl.data = net->sctp.sctp_hmac_alg ? : none;
320 tbl.maxlen = strlen(tbl.data);
321 }
322 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
323
324 if (write) {
325#ifdef CONFIG_CRYPTO_MD5
326 if (!strncmp(tmp, "md5", 3)) {
327 net->sctp.sctp_hmac_alg = "md5";
328 changed = 1;
329 }
330#endif
331#ifdef CONFIG_CRYPTO_SHA1
332 if (!strncmp(tmp, "sha1", 4)) {
333 net->sctp.sctp_hmac_alg = "sha1";
334 changed = 1;
335 }
336#endif
337 if (!strncmp(tmp, "none", 4)) {
338 net->sctp.sctp_hmac_alg = NULL;
339 changed = 1;
340 }
341
342 if (!changed)
343 ret = -EINVAL;
344 }
345
346 return ret;
347}
348
4f3fdf3b 349static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write,
350 void __user *buffer, size_t *lenp,
351 loff_t *ppos)
352{
353 struct net *net = current->nsproxy->net_ns;
354 int new_value;
355 struct ctl_table tbl;
356 unsigned int min = *(unsigned int *) ctl->extra1;
357 unsigned int max = *(unsigned int *) ctl->extra2;
358 int ret;
359
360 memset(&tbl, 0, sizeof(struct ctl_table));
361 tbl.maxlen = sizeof(unsigned int);
362
363 if (write)
364 tbl.data = &new_value;
365 else
366 tbl.data = &net->sctp.rto_min;
367 ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
368 if (write) {
369 if (ret || new_value > max || new_value < min)
370 return -EINVAL;
371 net->sctp.rto_min = new_value;
372 }
373 return ret;
374}
375
376static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
377 void __user *buffer, size_t *lenp,
378 loff_t *ppos)
379{
380 struct net *net = current->nsproxy->net_ns;
381 int new_value;
382 struct ctl_table tbl;
383 unsigned int min = *(unsigned int *) ctl->extra1;
384 unsigned int max = *(unsigned int *) ctl->extra2;
385 int ret;
386
387 memset(&tbl, 0, sizeof(struct ctl_table));
388 tbl.maxlen = sizeof(unsigned int);
389
390 if (write)
391 tbl.data = &new_value;
392 else
393 tbl.data = &net->sctp.rto_max;
394 ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
395 if (write) {
396 if (ret || new_value > max || new_value < min)
397 return -EINVAL;
398 net->sctp.rto_max = new_value;
399 }
400 return ret;
401}
402
ebb7e95d
EB		 403int sctp_sysctl_net_register(struct net *net)
404{
efb842c4 405 struct ctl_table *table = sctp_net_table;
406
407 if (!net_eq(net, &init_net)) {
408 int i;
ebb7e95d 409
efb842c4 410 table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);
411 if (!table)
412 return -ENOMEM;
ebb7e95d 413
efb842c4 414 for (i = 0; table[i].data; i++)
415 table[i].data += (char *)(&net->sctp) - (char *)&init_net.sctp;
416 }
e1fc3b14 417
ebb7e95d
EB		 418 net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table);
419 return 0;
420}
421
422void sctp_sysctl_net_unregister(struct net *net)
423{
5f19d121
VY		 424 struct ctl_table *table;
425
426 table = net->sctp.sysctl_header->ctl_table_arg;
ebb7e95d 427 unregister_net_sysctl_table(net->sctp.sysctl_header);
5f19d121 428 kfree(table);
ebb7e95d
EB		 429}
430
26ac8e5f 431static struct ctl_table_header *sctp_sysctl_header;
1da177e4
LT		 432
433/* Sysctl registration. */
434void sctp_sysctl_register(void)
435{
ec8f23ce 436 sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table);
1da177e4
LT		 437}
438
439/* Sysctl deregistration. */
440void sctp_sysctl_unregister(void)
441{
5dd3df10 442 unregister_net_sysctl_table(sctp_sysctl_header);
1da177e4 443}
Linux 6.x block layer and io_uring tree(s)