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       = "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       = "prsctp_enable",
 191                 .data           = &sctp_prsctp_enable,
 192                 .maxlen         = sizeof(int),
 193                 .mode           = 0644,
 194                 .proc_handler   = proc_dointvec,
 195         },
 196         {
 197                 .procname       = "sack_timeout",
 198                 .data           = &sctp_sack_timeout,
 199                 .maxlen         = sizeof(int),
 200                 .mode           = 0644,
 201                 .proc_handler   = proc_dointvec_minmax,
 202                 .extra1         = &sack_timer_min,
 203                 .extra2         = &sack_timer_max,
 204         },
 205         {
 206                 .procname       = "sctp_mem",
 207                 .data           = &sysctl_sctp_mem,
 208                 .maxlen         = sizeof(sysctl_sctp_mem),
 209                 .mode           = 0644,
 210                 .proc_handler   = proc_doulongvec_minmax
 211         },
 212         {
 213                 .procname       = "sctp_rmem",
 214                 .data           = &sysctl_sctp_rmem,
 215                 .maxlen         = sizeof(sysctl_sctp_rmem),
 216                 .mode           = 0644,
 217                 .proc_handler   = proc_dointvec,
 218         },
 219         {
 220                 .procname       = "sctp_wmem",
 221                 .data           = &sysctl_sctp_wmem,
 222                 .maxlen         = sizeof(sysctl_sctp_wmem),
 223                 .mode           = 0644,
 224                 .proc_handler   = proc_dointvec,
 225         },
 226         {
 227                 .procname       = "auth_enable",
 228                 .data           = &sctp_auth_enable,
 229                 .maxlen         = sizeof(int),
 230                 .mode           = 0644,
 231                 .proc_handler   = proc_dointvec,
 232         },
 233         {
 234                 .procname       = "addip_noauth_enable",
 235                 .data           = &sctp_addip_noauth,
 236                 .maxlen         = sizeof(int),
 237                 .mode           = 0644,
 238                 .proc_handler   = proc_dointvec,
 239         },
 240         {
 241                 .procname       = "addr_scope_policy",
 242                 .data           = &sctp_scope_policy,
 243                 .maxlen         = sizeof(int),
 244                 .mode           = 0644,
 245                 .proc_handler   = proc_dointvec_minmax,
 246                 .extra1         = &zero,
 247                 .extra2         = &addr_scope_max,
 248         },
 249         {
 250                 .procname       = "rwnd_update_shift",
 251                 .data           = &sctp_rwnd_upd_shift,
 252                 .maxlen         = sizeof(int),
 253                 .mode           = 0644,
 254                 .proc_handler   = &proc_dointvec_minmax,
 255                 .extra1         = &one,
 256                 .extra2         = &rwnd_scale_max,
 257         },
 258         {
 259                 .procname       = "max_autoclose",
 260                 .data           = &sctp_max_autoclose,
 261                 .maxlen         = sizeof(unsigned long),
 262                 .mode           = 0644,
 263                 .proc_handler   = &proc_doulongvec_minmax,
 264                 .extra1         = &max_autoclose_min,
 265                 .extra2         = &max_autoclose_max,
 266         },
 267
 268         { /* sentinel */ }
 269 };
 270
 271 static struct ctl_path sctp_path[] = {
 272         { .procname = "net", },
 273         { .procname = "sctp", },
 274         { }
 275 };
 276
 277 static struct ctl_table_header * sctp_sysctl_header;
 278
 279 /* Sysctl registration.  */
 280 void sctp_sysctl_register(void)
 281 {
 282         sctp_sysctl_header = register_sysctl_paths(sctp_path, sctp_table);
 283 }
 284
 285 /* Sysctl deregistration.  */
 286 void sctp_sysctl_unregister(void)
 287 {
 288         unregister_sysctl_table(sctp_sysctl_header);
 289 }