Vlad Yasevich | 60c778b | 2008-01-11 09:57:09 -0500 | [diff] [blame] | 1 | /* SCTP kernel implementation |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * (C) Copyright IBM Corp. 2002, 2004 |
| 3 | * Copyright (c) 2002 Intel Corp. |
| 4 | * |
Vlad Yasevich | 60c778b | 2008-01-11 09:57:09 -0500 | [diff] [blame] | 5 | * This file is part of the SCTP kernel implementation |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
| 7 | * Sysctl related interfaces for SCTP. |
| 8 | * |
Vlad Yasevich | 60c778b | 2008-01-11 09:57:09 -0500 | [diff] [blame] | 9 | * This SCTP implementation is free software; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
Vlad Yasevich | 60c778b | 2008-01-11 09:57:09 -0500 | [diff] [blame] | 15 | * This SCTP implementation is distributed in the hope that it |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Jeff Kirsher | 4b2f13a | 2013-12-06 06:28:48 -0800 | [diff] [blame] | 22 | * along with GNU CC; see the file COPYING. If not, see |
| 23 | * <http://www.gnu.org/licenses/>. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | * |
| 25 | * Please send any bug reports or fixes you make to the |
| 26 | * email address(es): |
Daniel Borkmann | 91705c6 | 2013-07-23 14:51:47 +0200 | [diff] [blame] | 27 | * lksctp developers <linux-sctp@vger.kernel.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | */ |
| 36 | |
Daniel Borkmann | b58537a | 2014-06-15 00:59:14 +0200 | [diff] [blame] | 37 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <net/sctp/structs.h> |
Adrian Bunk | 8c5955d | 2005-09-05 18:07:42 -0700 | [diff] [blame] | 40 | #include <net/sctp/sctp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/sysctl.h> |
| 42 | |
Vladislav Yasevich | 3fd091e | 2006-08-22 13:29:17 -0700 | [diff] [blame] | 43 | static int zero = 0; |
| 44 | static int one = 1; |
| 45 | static int timer_max = 86400000; /* ms in one day */ |
| 46 | static int int_max = INT_MAX; |
Jean-Mickael Guerin | d48e074 | 2009-05-13 00:03:20 +0200 | [diff] [blame] | 47 | static int sack_timer_min = 1; |
| 48 | static int sack_timer_max = 500; |
Bhaskar Dutta | 7238843 | 2009-09-03 17:25:47 +0530 | [diff] [blame] | 49 | static int addr_scope_max = 3; /* check sctp_scope_policy_t in include/net/sctp/constants.h for max entries */ |
Vlad Yasevich | 90f2f53 | 2009-11-23 15:53:57 -0500 | [diff] [blame] | 50 | static int rwnd_scale_max = 16; |
Daniel Borkmann | b58537a | 2014-06-15 00:59:14 +0200 | [diff] [blame] | 51 | static int rto_alpha_min = 0; |
| 52 | static int rto_beta_min = 0; |
| 53 | static int rto_alpha_max = 1000; |
| 54 | static int rto_beta_max = 1000; |
| 55 | |
Xi Wang | 2692ba6 | 2011-12-16 12:44:15 +0000 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
wangweidong | b486b22 | 2013-12-11 09:50:40 +0800 | [diff] [blame] | 61 | static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write, |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 62 | void __user *buffer, size_t *lenp, |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 63 | loff_t *ppos); |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 64 | static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write, |
| 65 | void __user *buffer, size_t *lenp, |
| 66 | loff_t *ppos); |
| 67 | static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write, |
| 68 | void __user *buffer, size_t *lenp, |
| 69 | loff_t *ppos); |
Daniel Borkmann | b58537a | 2014-06-15 00:59:14 +0200 | [diff] [blame] | 70 | static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write, |
| 71 | void __user *buffer, size_t *lenp, |
| 72 | loff_t *ppos); |
Vlad Yasevich | b14878c | 2014-04-17 17:26:50 +0200 | [diff] [blame] | 73 | static int proc_sctp_do_auth(struct ctl_table *ctl, int write, |
| 74 | void __user *buffer, size_t *lenp, |
| 75 | loff_t *ppos); |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 76 | |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 77 | static struct ctl_table sctp_table[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | { |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 79 | .procname = "sctp_mem", |
| 80 | .data = &sysctl_sctp_mem, |
| 81 | .maxlen = sizeof(sysctl_sctp_mem), |
| 82 | .mode = 0644, |
Eric Dumazet | 8d987e5 | 2010-11-09 23:24:26 +0000 | [diff] [blame] | 83 | .proc_handler = proc_doulongvec_minmax |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 84 | }, |
| 85 | { |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 86 | .procname = "sctp_rmem", |
| 87 | .data = &sysctl_sctp_rmem, |
| 88 | .maxlen = sizeof(sysctl_sctp_rmem), |
| 89 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 90 | .proc_handler = proc_dointvec, |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 91 | }, |
| 92 | { |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 93 | .procname = "sctp_wmem", |
| 94 | .data = &sysctl_sctp_wmem, |
| 95 | .maxlen = sizeof(sysctl_sctp_wmem), |
| 96 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 97 | .proc_handler = proc_dointvec, |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 98 | }, |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 99 | |
| 100 | { /* sentinel */ } |
| 101 | }; |
| 102 | |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 103 | static struct ctl_table sctp_net_table[] = { |
Vlad Yasevich | a29a5bd | 2007-09-16 19:31:35 -0700 | [diff] [blame] | 104 | { |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 105 | .procname = "rto_initial", |
| 106 | .data = &init_net.sctp.rto_initial, |
| 107 | .maxlen = sizeof(unsigned int), |
| 108 | .mode = 0644, |
| 109 | .proc_handler = proc_dointvec_minmax, |
| 110 | .extra1 = &one, |
| 111 | .extra2 = &timer_max |
| 112 | }, |
| 113 | { |
| 114 | .procname = "rto_min", |
| 115 | .data = &init_net.sctp.rto_min, |
| 116 | .maxlen = sizeof(unsigned int), |
| 117 | .mode = 0644, |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 118 | .proc_handler = proc_sctp_do_rto_min, |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 119 | .extra1 = &one, |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 120 | .extra2 = &init_net.sctp.rto_max |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 121 | }, |
| 122 | { |
| 123 | .procname = "rto_max", |
| 124 | .data = &init_net.sctp.rto_max, |
| 125 | .maxlen = sizeof(unsigned int), |
| 126 | .mode = 0644, |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 127 | .proc_handler = proc_sctp_do_rto_max, |
| 128 | .extra1 = &init_net.sctp.rto_min, |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 129 | .extra2 = &timer_max |
| 130 | }, |
| 131 | { |
| 132 | .procname = "rto_alpha_exp_divisor", |
| 133 | .data = &init_net.sctp.rto_alpha, |
| 134 | .maxlen = sizeof(int), |
Daniel Borkmann | b58537a | 2014-06-15 00:59:14 +0200 | [diff] [blame] | 135 | .mode = 0644, |
| 136 | .proc_handler = proc_sctp_do_alpha_beta, |
| 137 | .extra1 = &rto_alpha_min, |
| 138 | .extra2 = &rto_alpha_max, |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 139 | }, |
| 140 | { |
| 141 | .procname = "rto_beta_exp_divisor", |
| 142 | .data = &init_net.sctp.rto_beta, |
| 143 | .maxlen = sizeof(int), |
Daniel Borkmann | b58537a | 2014-06-15 00:59:14 +0200 | [diff] [blame] | 144 | .mode = 0644, |
| 145 | .proc_handler = proc_sctp_do_alpha_beta, |
| 146 | .extra1 = &rto_beta_min, |
| 147 | .extra2 = &rto_beta_max, |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 148 | }, |
| 149 | { |
| 150 | .procname = "max_burst", |
| 151 | .data = &init_net.sctp.max_burst, |
| 152 | .maxlen = sizeof(int), |
| 153 | .mode = 0644, |
| 154 | .proc_handler = proc_dointvec_minmax, |
| 155 | .extra1 = &zero, |
| 156 | .extra2 = &int_max |
| 157 | }, |
| 158 | { |
| 159 | .procname = "cookie_preserve_enable", |
| 160 | .data = &init_net.sctp.cookie_preserve_enable, |
| 161 | .maxlen = sizeof(int), |
| 162 | .mode = 0644, |
| 163 | .proc_handler = proc_dointvec, |
| 164 | }, |
| 165 | { |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 166 | .procname = "cookie_hmac_alg", |
wangweidong | 22a1f514 | 2014-02-12 09:44:43 +0800 | [diff] [blame] | 167 | .data = &init_net.sctp.sctp_hmac_alg, |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 168 | .maxlen = 8, |
| 169 | .mode = 0644, |
| 170 | .proc_handler = proc_sctp_do_hmac_alg, |
| 171 | }, |
| 172 | { |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 173 | .procname = "valid_cookie_life", |
| 174 | .data = &init_net.sctp.valid_cookie_life, |
| 175 | .maxlen = sizeof(unsigned int), |
| 176 | .mode = 0644, |
| 177 | .proc_handler = proc_dointvec_minmax, |
| 178 | .extra1 = &one, |
| 179 | .extra2 = &timer_max |
| 180 | }, |
| 181 | { |
| 182 | .procname = "sack_timeout", |
| 183 | .data = &init_net.sctp.sack_timeout, |
| 184 | .maxlen = sizeof(int), |
| 185 | .mode = 0644, |
| 186 | .proc_handler = proc_dointvec_minmax, |
| 187 | .extra1 = &sack_timer_min, |
| 188 | .extra2 = &sack_timer_max, |
| 189 | }, |
| 190 | { |
| 191 | .procname = "hb_interval", |
| 192 | .data = &init_net.sctp.hb_interval, |
| 193 | .maxlen = sizeof(unsigned int), |
| 194 | .mode = 0644, |
| 195 | .proc_handler = proc_dointvec_minmax, |
| 196 | .extra1 = &one, |
| 197 | .extra2 = &timer_max |
| 198 | }, |
| 199 | { |
| 200 | .procname = "association_max_retrans", |
| 201 | .data = &init_net.sctp.max_retrans_association, |
| 202 | .maxlen = sizeof(int), |
| 203 | .mode = 0644, |
| 204 | .proc_handler = proc_dointvec_minmax, |
| 205 | .extra1 = &one, |
| 206 | .extra2 = &int_max |
| 207 | }, |
| 208 | { |
| 209 | .procname = "path_max_retrans", |
| 210 | .data = &init_net.sctp.max_retrans_path, |
| 211 | .maxlen = sizeof(int), |
| 212 | .mode = 0644, |
| 213 | .proc_handler = proc_dointvec_minmax, |
| 214 | .extra1 = &one, |
| 215 | .extra2 = &int_max |
| 216 | }, |
| 217 | { |
| 218 | .procname = "max_init_retransmits", |
| 219 | .data = &init_net.sctp.max_retrans_init, |
| 220 | .maxlen = sizeof(int), |
| 221 | .mode = 0644, |
| 222 | .proc_handler = proc_dointvec_minmax, |
| 223 | .extra1 = &one, |
| 224 | .extra2 = &int_max |
| 225 | }, |
| 226 | { |
| 227 | .procname = "pf_retrans", |
| 228 | .data = &init_net.sctp.pf_retrans, |
| 229 | .maxlen = sizeof(int), |
| 230 | .mode = 0644, |
| 231 | .proc_handler = proc_dointvec_minmax, |
| 232 | .extra1 = &zero, |
| 233 | .extra2 = &int_max |
| 234 | }, |
| 235 | { |
| 236 | .procname = "sndbuf_policy", |
| 237 | .data = &init_net.sctp.sndbuf_policy, |
| 238 | .maxlen = sizeof(int), |
| 239 | .mode = 0644, |
| 240 | .proc_handler = proc_dointvec, |
| 241 | }, |
| 242 | { |
| 243 | .procname = "rcvbuf_policy", |
| 244 | .data = &init_net.sctp.rcvbuf_policy, |
| 245 | .maxlen = sizeof(int), |
| 246 | .mode = 0644, |
| 247 | .proc_handler = proc_dointvec, |
| 248 | }, |
| 249 | { |
| 250 | .procname = "default_auto_asconf", |
| 251 | .data = &init_net.sctp.default_auto_asconf, |
| 252 | .maxlen = sizeof(int), |
| 253 | .mode = 0644, |
| 254 | .proc_handler = proc_dointvec, |
| 255 | }, |
| 256 | { |
| 257 | .procname = "addip_enable", |
| 258 | .data = &init_net.sctp.addip_enable, |
Vlad Yasevich | a29a5bd | 2007-09-16 19:31:35 -0700 | [diff] [blame] | 259 | .maxlen = sizeof(int), |
| 260 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 261 | .proc_handler = proc_dointvec, |
Vlad Yasevich | a29a5bd | 2007-09-16 19:31:35 -0700 | [diff] [blame] | 262 | }, |
Vlad Yasevich | 73d9c4f | 2007-10-24 17:24:26 -0400 | [diff] [blame] | 263 | { |
Vlad Yasevich | 73d9c4f | 2007-10-24 17:24:26 -0400 | [diff] [blame] | 264 | .procname = "addip_noauth_enable", |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 265 | .data = &init_net.sctp.addip_noauth, |
| 266 | .maxlen = sizeof(int), |
| 267 | .mode = 0644, |
| 268 | .proc_handler = proc_dointvec, |
| 269 | }, |
| 270 | { |
| 271 | .procname = "prsctp_enable", |
| 272 | .data = &init_net.sctp.prsctp_enable, |
| 273 | .maxlen = sizeof(int), |
| 274 | .mode = 0644, |
| 275 | .proc_handler = proc_dointvec, |
| 276 | }, |
| 277 | { |
Xin Long | c0d8bab | 2017-03-10 12:11:12 +0800 | [diff] [blame] | 278 | .procname = "reconf_enable", |
| 279 | .data = &init_net.sctp.reconf_enable, |
| 280 | .maxlen = sizeof(int), |
| 281 | .mode = 0644, |
| 282 | .proc_handler = proc_dointvec, |
| 283 | }, |
| 284 | { |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 285 | .procname = "auth_enable", |
| 286 | .data = &init_net.sctp.auth_enable, |
Vlad Yasevich | 73d9c4f | 2007-10-24 17:24:26 -0400 | [diff] [blame] | 287 | .maxlen = sizeof(int), |
| 288 | .mode = 0644, |
Vlad Yasevich | b14878c | 2014-04-17 17:26:50 +0200 | [diff] [blame] | 289 | .proc_handler = proc_sctp_do_auth, |
Vlad Yasevich | 73d9c4f | 2007-10-24 17:24:26 -0400 | [diff] [blame] | 290 | }, |
Bhaskar Dutta | 7238843 | 2009-09-03 17:25:47 +0530 | [diff] [blame] | 291 | { |
Bhaskar Dutta | 7238843 | 2009-09-03 17:25:47 +0530 | [diff] [blame] | 292 | .procname = "addr_scope_policy", |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 293 | .data = &init_net.sctp.scope_policy, |
Bhaskar Dutta | 7238843 | 2009-09-03 17:25:47 +0530 | [diff] [blame] | 294 | .maxlen = sizeof(int), |
| 295 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 296 | .proc_handler = proc_dointvec_minmax, |
Bhaskar Dutta | 7238843 | 2009-09-03 17:25:47 +0530 | [diff] [blame] | 297 | .extra1 = &zero, |
| 298 | .extra2 = &addr_scope_max, |
| 299 | }, |
Vlad Yasevich | 90f2f53 | 2009-11-23 15:53:57 -0500 | [diff] [blame] | 300 | { |
Vlad Yasevich | 90f2f53 | 2009-11-23 15:53:57 -0500 | [diff] [blame] | 301 | .procname = "rwnd_update_shift", |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 302 | .data = &init_net.sctp.rwnd_upd_shift, |
Vlad Yasevich | 90f2f53 | 2009-11-23 15:53:57 -0500 | [diff] [blame] | 303 | .maxlen = sizeof(int), |
| 304 | .mode = 0644, |
| 305 | .proc_handler = &proc_dointvec_minmax, |
Vlad Yasevich | 90f2f53 | 2009-11-23 15:53:57 -0500 | [diff] [blame] | 306 | .extra1 = &one, |
| 307 | .extra2 = &rwnd_scale_max, |
| 308 | }, |
Xi Wang | 2692ba6 | 2011-12-16 12:44:15 +0000 | [diff] [blame] | 309 | { |
| 310 | .procname = "max_autoclose", |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 311 | .data = &init_net.sctp.max_autoclose, |
Xi Wang | 2692ba6 | 2011-12-16 12:44:15 +0000 | [diff] [blame] | 312 | .maxlen = sizeof(unsigned long), |
| 313 | .mode = 0644, |
| 314 | .proc_handler = &proc_doulongvec_minmax, |
| 315 | .extra1 = &max_autoclose_min, |
| 316 | .extra2 = &max_autoclose_max, |
| 317 | }, |
Zhu Yanjun | 566178f | 2015-12-16 13:55:04 +0800 | [diff] [blame] | 318 | { |
| 319 | .procname = "pf_enable", |
| 320 | .data = &init_net.sctp.pf_enable, |
| 321 | .maxlen = sizeof(int), |
| 322 | .mode = 0644, |
| 323 | .proc_handler = proc_dointvec, |
| 324 | }, |
David S. Miller | 71acc0d | 2013-08-09 13:09:41 -0700 | [diff] [blame] | 325 | |
Linus Torvalds | d7fc02c | 2009-12-08 07:55:01 -0800 | [diff] [blame] | 326 | { /* sentinel */ } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | }; |
| 328 | |
wangweidong | b486b22 | 2013-12-11 09:50:40 +0800 | [diff] [blame] | 329 | static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write, |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 330 | void __user *buffer, size_t *lenp, |
| 331 | loff_t *ppos) |
| 332 | { |
| 333 | struct net *net = current->nsproxy->net_ns; |
Joe Perches | fe2c633 | 2013-06-11 23:04:25 -0700 | [diff] [blame] | 334 | struct ctl_table tbl; |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 335 | bool changed = false; |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 336 | char *none = "none"; |
Sasha Levin | 320f1a4 | 2016-01-07 14:52:43 -0500 | [diff] [blame] | 337 | char tmp[8] = {0}; |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 338 | int ret; |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 339 | |
| 340 | memset(&tbl, 0, sizeof(struct ctl_table)); |
| 341 | |
| 342 | if (write) { |
| 343 | tbl.data = tmp; |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 344 | tbl.maxlen = sizeof(tmp); |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 345 | } else { |
| 346 | tbl.data = net->sctp.sctp_hmac_alg ? : none; |
| 347 | tbl.maxlen = strlen(tbl.data); |
| 348 | } |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 349 | |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 350 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
| 351 | if (write && ret == 0) { |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 352 | #ifdef CONFIG_CRYPTO_MD5 |
| 353 | if (!strncmp(tmp, "md5", 3)) { |
| 354 | net->sctp.sctp_hmac_alg = "md5"; |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 355 | changed = true; |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 356 | } |
| 357 | #endif |
| 358 | #ifdef CONFIG_CRYPTO_SHA1 |
| 359 | if (!strncmp(tmp, "sha1", 4)) { |
| 360 | net->sctp.sctp_hmac_alg = "sha1"; |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 361 | changed = true; |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 362 | } |
| 363 | #endif |
| 364 | if (!strncmp(tmp, "none", 4)) { |
| 365 | net->sctp.sctp_hmac_alg = NULL; |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 366 | changed = true; |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 367 | } |
Neil Horman | 3c68198 | 2012-10-24 09:20:03 +0000 | [diff] [blame] | 368 | if (!changed) |
| 369 | ret = -EINVAL; |
| 370 | } |
| 371 | |
| 372 | return ret; |
| 373 | } |
| 374 | |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 375 | static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write, |
| 376 | void __user *buffer, size_t *lenp, |
| 377 | loff_t *ppos) |
| 378 | { |
| 379 | struct net *net = current->nsproxy->net_ns; |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 380 | unsigned int min = *(unsigned int *) ctl->extra1; |
| 381 | unsigned int max = *(unsigned int *) ctl->extra2; |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 382 | struct ctl_table tbl; |
| 383 | int ret, new_value; |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 384 | |
| 385 | memset(&tbl, 0, sizeof(struct ctl_table)); |
| 386 | tbl.maxlen = sizeof(unsigned int); |
| 387 | |
| 388 | if (write) |
| 389 | tbl.data = &new_value; |
| 390 | else |
| 391 | tbl.data = &net->sctp.rto_min; |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 392 | |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 393 | ret = proc_dointvec(&tbl, write, buffer, lenp, ppos); |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 394 | if (write && ret == 0) { |
| 395 | if (new_value > max || new_value < min) |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 396 | return -EINVAL; |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 397 | |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 398 | net->sctp.rto_min = new_value; |
| 399 | } |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 400 | |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 401 | return ret; |
| 402 | } |
| 403 | |
| 404 | static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write, |
| 405 | void __user *buffer, size_t *lenp, |
| 406 | loff_t *ppos) |
| 407 | { |
| 408 | struct net *net = current->nsproxy->net_ns; |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 409 | unsigned int min = *(unsigned int *) ctl->extra1; |
| 410 | unsigned int max = *(unsigned int *) ctl->extra2; |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 411 | struct ctl_table tbl; |
| 412 | int ret, new_value; |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 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.rto_max; |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 421 | |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 422 | ret = proc_dointvec(&tbl, write, buffer, lenp, ppos); |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 423 | if (write && ret == 0) { |
| 424 | if (new_value > max || new_value < min) |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 425 | return -EINVAL; |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 426 | |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 427 | net->sctp.rto_max = new_value; |
| 428 | } |
Daniel Borkmann | ff5e92c | 2014-06-19 01:31:30 +0200 | [diff] [blame] | 429 | |
wangweidong | 4f3fdf3 | 2013-12-11 09:50:39 +0800 | [diff] [blame] | 430 | return ret; |
| 431 | } |
| 432 | |
Daniel Borkmann | b58537a | 2014-06-15 00:59:14 +0200 | [diff] [blame] | 433 | static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write, |
| 434 | void __user *buffer, size_t *lenp, |
| 435 | loff_t *ppos) |
| 436 | { |
Daniel Borkmann | eaea2da | 2014-06-30 13:52:09 +0200 | [diff] [blame] | 437 | if (write) |
| 438 | pr_warn_once("Changing rto_alpha or rto_beta may lead to " |
| 439 | "suboptimal rtt/srtt estimations!\n"); |
Daniel Borkmann | b58537a | 2014-06-15 00:59:14 +0200 | [diff] [blame] | 440 | |
| 441 | return proc_dointvec_minmax(ctl, write, buffer, lenp, ppos); |
| 442 | } |
| 443 | |
Vlad Yasevich | b14878c | 2014-04-17 17:26:50 +0200 | [diff] [blame] | 444 | static int proc_sctp_do_auth(struct ctl_table *ctl, int write, |
| 445 | void __user *buffer, size_t *lenp, |
| 446 | loff_t *ppos) |
| 447 | { |
| 448 | struct net *net = current->nsproxy->net_ns; |
| 449 | struct ctl_table tbl; |
| 450 | int new_value, ret; |
| 451 | |
| 452 | memset(&tbl, 0, sizeof(struct ctl_table)); |
| 453 | tbl.maxlen = sizeof(unsigned int); |
| 454 | |
| 455 | if (write) |
| 456 | tbl.data = &new_value; |
| 457 | else |
| 458 | tbl.data = &net->sctp.auth_enable; |
| 459 | |
| 460 | ret = proc_dointvec(&tbl, write, buffer, lenp, ppos); |
Daniel Borkmann | 24599e6 | 2014-06-18 23:46:31 +0200 | [diff] [blame] | 461 | if (write && ret == 0) { |
Vlad Yasevich | b14878c | 2014-04-17 17:26:50 +0200 | [diff] [blame] | 462 | struct sock *sk = net->sctp.ctl_sock; |
| 463 | |
| 464 | net->sctp.auth_enable = new_value; |
| 465 | /* Update the value in the control socket */ |
| 466 | lock_sock(sk); |
| 467 | sctp_sk(sk)->ep->auth_enable = new_value; |
| 468 | release_sock(sk); |
| 469 | } |
| 470 | |
| 471 | return ret; |
| 472 | } |
| 473 | |
Eric W. Biederman | ebb7e95 | 2012-08-07 07:23:59 +0000 | [diff] [blame] | 474 | int sctp_sysctl_net_register(struct net *net) |
| 475 | { |
wangweidong | eb9f370 | 2014-05-08 20:55:01 +0800 | [diff] [blame] | 476 | struct ctl_table *table; |
| 477 | int i; |
Eric W. Biederman | ebb7e95 | 2012-08-07 07:23:59 +0000 | [diff] [blame] | 478 | |
wangweidong | eb9f370 | 2014-05-08 20:55:01 +0800 | [diff] [blame] | 479 | table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL); |
| 480 | if (!table) |
| 481 | return -ENOMEM; |
Eric W. Biederman | ebb7e95 | 2012-08-07 07:23:59 +0000 | [diff] [blame] | 482 | |
wangweidong | eb9f370 | 2014-05-08 20:55:01 +0800 | [diff] [blame] | 483 | for (i = 0; table[i].data; i++) |
| 484 | table[i].data += (char *)(&net->sctp) - (char *)&init_net.sctp; |
Eric W. Biederman | e1fc3b1 | 2012-08-07 07:29:57 +0000 | [diff] [blame] | 485 | |
Eric W. Biederman | ebb7e95 | 2012-08-07 07:23:59 +0000 | [diff] [blame] | 486 | net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table); |
wangweidong | f66138c | 2014-05-08 20:55:02 +0800 | [diff] [blame] | 487 | if (net->sctp.sysctl_header == NULL) { |
| 488 | kfree(table); |
| 489 | return -ENOMEM; |
| 490 | } |
Eric W. Biederman | ebb7e95 | 2012-08-07 07:23:59 +0000 | [diff] [blame] | 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | void sctp_sysctl_net_unregister(struct net *net) |
| 495 | { |
Vlad Yasevich | 5f19d12 | 2013-01-24 11:02:47 -0500 | [diff] [blame] | 496 | struct ctl_table *table; |
| 497 | |
| 498 | table = net->sctp.sysctl_header->ctl_table_arg; |
Eric W. Biederman | ebb7e95 | 2012-08-07 07:23:59 +0000 | [diff] [blame] | 499 | unregister_net_sysctl_table(net->sctp.sysctl_header); |
Vlad Yasevich | 5f19d12 | 2013-01-24 11:02:47 -0500 | [diff] [blame] | 500 | kfree(table); |
Eric W. Biederman | ebb7e95 | 2012-08-07 07:23:59 +0000 | [diff] [blame] | 501 | } |
| 502 | |
wangweidong | 26ac8e5 | 2013-12-23 12:16:51 +0800 | [diff] [blame] | 503 | static struct ctl_table_header *sctp_sysctl_header; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | |
| 505 | /* Sysctl registration. */ |
| 506 | void sctp_sysctl_register(void) |
| 507 | { |
Eric W. Biederman | ec8f23c | 2012-04-19 13:44:49 +0000 | [diff] [blame] | 508 | sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | } |
| 510 | |
| 511 | /* Sysctl deregistration. */ |
| 512 | void sctp_sysctl_unregister(void) |
| 513 | { |
Eric W. Biederman | 5dd3df1 | 2012-04-19 13:24:33 +0000 | [diff] [blame] | 514 | unregister_net_sysctl_table(sctp_sysctl_header); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | } |