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 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       = "sctp_mem",
  68                 .data           = &sysctl_sctp_mem,
  69                 .maxlen         = sizeof(sysctl_sctp_mem),
  70                 .mode           = 0644,
  71                 .proc_handler   = proc_doulongvec_minmax
  72         },
  73         {
  74                 .procname       = "sctp_rmem",
  75                 .data           = &sysctl_sctp_rmem,
  76                 .maxlen         = sizeof(sysctl_sctp_rmem),
  77                 .mode           = 0644,
  78                 .proc_handler   = proc_dointvec,
  79         },
  80         {
  81                 .procname       = "sctp_wmem",
  82                 .data           = &sysctl_sctp_wmem,
  83                 .maxlen         = sizeof(sysctl_sctp_wmem),
  84                 .mode           = 0644,
  85                 .proc_handler   = proc_dointvec,
  86         },
  87
  88         { /* sentinel */ }
  89 };
  90
  91 static ctl_table sctp_net_table[] = {
  92         {
  93                 .procname       = "rto_initial",
  94                 .data           = &init_net.sctp.rto_initial,
  95                 .maxlen         = sizeof(unsigned int),
  96                 .mode           = 0644,
  97                 .proc_handler   = proc_dointvec_minmax,
  98                 .extra1         = &one,
  99                 .extra2         = &timer_max
 100         },
 101         {
 102                 .procname       = "rto_min",
 103                 .data           = &init_net.sctp.rto_min,
 104                 .maxlen         = sizeof(unsigned int),
 105                 .mode           = 0644,
 106                 .proc_handler   = proc_dointvec_minmax,
 107                 .extra1         = &one,
 108                 .extra2         = &timer_max
 109         },
 110         {
 111                 .procname       = "rto_max",
 112                 .data           = &init_net.sctp.rto_max,
 113                 .maxlen         = sizeof(unsigned int),
 114                 .mode           = 0644,
 115                 .proc_handler   = proc_dointvec_minmax,
 116                 .extra1         = &one,
 117                 .extra2         = &timer_max
 118         },
 119         {
 120                 .procname       = "rto_alpha_exp_divisor",
 121                 .data           = &init_net.sctp.rto_alpha,
 122                 .maxlen         = sizeof(int),
 123                 .mode           = 0444,
 124                 .proc_handler   = proc_dointvec,
 125         },
 126         {
 127                 .procname       = "rto_beta_exp_divisor",
 128                 .data           = &init_net.sctp.rto_beta,
 129                 .maxlen         = sizeof(int),
 130                 .mode           = 0444,
 131                 .proc_handler   = proc_dointvec,
 132         },
 133         {
 134                 .procname       = "max_burst",
 135                 .data           = &init_net.sctp.max_burst,
 136                 .maxlen         = sizeof(int),
 137                 .mode           = 0644,
 138                 .proc_handler   = proc_dointvec_minmax,
 139                 .extra1         = &zero,
 140                 .extra2         = &int_max
 141         },
 142         {
 143                 .procname       = "cookie_preserve_enable",
 144                 .data           = &init_net.sctp.cookie_preserve_enable,
 145                 .maxlen         = sizeof(int),
 146                 .mode           = 0644,
 147                 .proc_handler   = proc_dointvec,
 148         },
 149         {
 150                 .procname       = "valid_cookie_life",
 151                 .data           = &init_net.sctp.valid_cookie_life,
 152                 .maxlen         = sizeof(unsigned int),
 153                 .mode           = 0644,
 154                 .proc_handler   = proc_dointvec_minmax,
 155                 .extra1         = &one,
 156                 .extra2         = &timer_max
 157         },
 158         {
 159                 .procname       = "sack_timeout",
 160                 .data           = &init_net.sctp.sack_timeout,
 161                 .maxlen         = sizeof(int),
 162                 .mode           = 0644,
 163                 .proc_handler   = proc_dointvec_minmax,
 164                 .extra1         = &sack_timer_min,
 165                 .extra2         = &sack_timer_max,
 166         },
 167         {
 168                 .procname       = "hb_interval",
 169                 .data           = &init_net.sctp.hb_interval,
 170                 .maxlen         = sizeof(unsigned int),
 171                 .mode           = 0644,
 172                 .proc_handler   = proc_dointvec_minmax,
 173                 .extra1         = &one,
 174                 .extra2         = &timer_max
 175         },
 176         {
 177                 .procname       = "association_max_retrans",
 178                 .data           = &init_net.sctp.max_retrans_association,
 179                 .maxlen         = sizeof(int),
 180                 .mode           = 0644,
 181                 .proc_handler   = proc_dointvec_minmax,
 182                 .extra1         = &one,
 183                 .extra2         = &int_max
 184         },
 185         {
 186                 .procname       = "path_max_retrans",
 187                 .data           = &init_net.sctp.max_retrans_path,
 188                 .maxlen         = sizeof(int),
 189                 .mode           = 0644,
 190                 .proc_handler   = proc_dointvec_minmax,
 191                 .extra1         = &one,
 192                 .extra2         = &int_max
 193         },
 194         {
 195                 .procname       = "max_init_retransmits",
 196                 .data           = &init_net.sctp.max_retrans_init,
 197                 .maxlen         = sizeof(int),
 198                 .mode           = 0644,
 199                 .proc_handler   = proc_dointvec_minmax,
 200                 .extra1         = &one,
 201                 .extra2         = &int_max
 202         },
 203         {
 204                 .procname       = "pf_retrans",
 205                 .data           = &init_net.sctp.pf_retrans,
 206                 .maxlen         = sizeof(int),
 207                 .mode           = 0644,
 208                 .proc_handler   = proc_dointvec_minmax,
 209                 .extra1         = &zero,
 210                 .extra2         = &int_max
 211         },
 212         {
 213                 .procname       = "sndbuf_policy",
 214                 .data           = &init_net.sctp.sndbuf_policy,
 215                 .maxlen         = sizeof(int),
 216                 .mode           = 0644,
 217                 .proc_handler   = proc_dointvec,
 218         },
 219         {
 220                 .procname       = "rcvbuf_policy",
 221                 .data           = &init_net.sctp.rcvbuf_policy,
 222                 .maxlen         = sizeof(int),
 223                 .mode           = 0644,
 224                 .proc_handler   = proc_dointvec,
 225         },
 226         {
 227                 .procname       = "default_auto_asconf",
 228                 .data           = &init_net.sctp.default_auto_asconf,
 229                 .maxlen         = sizeof(int),
 230                 .mode           = 0644,
 231                 .proc_handler   = proc_dointvec,
 232         },
 233         {
 234                 .procname       = "addip_enable",
 235                 .data           = &init_net.sctp.addip_enable,
 236                 .maxlen         = sizeof(int),
 237                 .mode           = 0644,
 238                 .proc_handler   = proc_dointvec,
 239         },
 240         {
 241                 .procname       = "addip_noauth_enable",
 242                 .data           = &init_net.sctp.addip_noauth,
 243                 .maxlen         = sizeof(int),
 244                 .mode           = 0644,
 245                 .proc_handler   = proc_dointvec,
 246         },
 247         {
 248                 .procname       = "prsctp_enable",
 249                 .data           = &init_net.sctp.prsctp_enable,
 250                 .maxlen         = sizeof(int),
 251                 .mode           = 0644,
 252                 .proc_handler   = proc_dointvec,
 253         },
 254         {
 255                 .procname       = "auth_enable",
 256                 .data           = &init_net.sctp.auth_enable,
 257                 .maxlen         = sizeof(int),
 258                 .mode           = 0644,
 259                 .proc_handler   = proc_dointvec,
 260         },
 261         {
 262                 .procname       = "addr_scope_policy",
 263                 .data           = &init_net.sctp.scope_policy,
 264                 .maxlen         = sizeof(int),
 265                 .mode           = 0644,
 266                 .proc_handler   = proc_dointvec_minmax,
 267                 .extra1         = &zero,
 268                 .extra2         = &addr_scope_max,
 269         },
 270         {
 271                 .procname       = "rwnd_update_shift",
 272                 .data           = &init_net.sctp.rwnd_upd_shift,
 273                 .maxlen         = sizeof(int),
 274                 .mode           = 0644,
 275                 .proc_handler   = &proc_dointvec_minmax,
 276                 .extra1         = &one,
 277                 .extra2         = &rwnd_scale_max,
 278         },
 279         {
 280                 .procname       = "max_autoclose",
 281                 .data           = &init_net.sctp.max_autoclose,
 282                 .maxlen         = sizeof(unsigned long),
 283                 .mode           = 0644,
 284                 .proc_handler   = &proc_doulongvec_minmax,
 285                 .extra1         = &max_autoclose_min,
 286                 .extra2         = &max_autoclose_max,
 287         },
 288
 289         { /* sentinel */ }
 290 };
 291
 292 int sctp_sysctl_net_register(struct net *net)
 293 {
 294         struct ctl_table *table;
 295         int i;
 296
 297         table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);
 298         if (!table)
 299                 return -ENOMEM;
 300
 301         for (i = 0; table[i].data; i++)
 302                 table[i].data += (char *)(&net->sctp) - (char *)&init_net.sctp;
 303
 304         net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table);
 305         return 0;
 306 }
 307
 308 void sctp_sysctl_net_unregister(struct net *net)
 309 {
 310         unregister_net_sysctl_table(net->sctp.sysctl_header);
 311 }
 312
 313 static struct ctl_table_header * sctp_sysctl_header;
 314
 315 /* Sysctl registration.  */
 316 void sctp_sysctl_register(void)
 317 {
 318         sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table);
 319 }
 320
 321 /* Sysctl deregistration.  */
 322 void sctp_sysctl_unregister(void)
 323 {
 324         unregister_net_sysctl_table(sctp_sysctl_header);
 325 }