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
  57 extern int sysctl_sctp_mem[3];
  58 extern int sysctl_sctp_rmem[3];
  59 extern int sysctl_sctp_wmem[3];
  60
  61 static ctl_table sctp_table[] = {
  62         {
  63                 .ctl_name       = NET_SCTP_RTO_INITIAL,
  64                 .procname       = "rto_initial",
  65                 .data           = &sctp_rto_initial,
  66                 .maxlen         = sizeof(unsigned int),
  67                 .mode           = 0644,
  68                 .proc_handler   = proc_dointvec_minmax,
  69                 .strategy       = sysctl_intvec,
  70                 .extra1         = &one,
  71                 .extra2         = &timer_max
  72         },
  73         {
  74                 .ctl_name       = NET_SCTP_RTO_MIN,
  75                 .procname       = "rto_min",
  76                 .data           = &sctp_rto_min,
  77                 .maxlen         = sizeof(unsigned int),
  78                 .mode           = 0644,
  79                 .proc_handler   = proc_dointvec_minmax,
  80                 .strategy       = sysctl_intvec,
  81                 .extra1         = &one,
  82                 .extra2         = &timer_max
  83         },
  84         {
  85                 .ctl_name       = NET_SCTP_RTO_MAX,
  86                 .procname       = "rto_max",
  87                 .data           = &sctp_rto_max,
  88                 .maxlen         = sizeof(unsigned int),
  89                 .mode           = 0644,
  90                 .proc_handler   = proc_dointvec_minmax,
  91                 .strategy       = sysctl_intvec,
  92                 .extra1         = &one,
  93                 .extra2         = &timer_max
  94         },
  95         {
  96                 .ctl_name       = NET_SCTP_VALID_COOKIE_LIFE,
  97                 .procname       = "valid_cookie_life",
  98                 .data           = &sctp_valid_cookie_life,
  99                 .maxlen         = sizeof(unsigned int),
 100                 .mode           = 0644,
 101                 .proc_handler   = proc_dointvec_minmax,
 102                 .strategy       = sysctl_intvec,
 103                 .extra1         = &one,
 104                 .extra2         = &timer_max
 105         },
 106         {
 107                 .ctl_name       = NET_SCTP_MAX_BURST,
 108                 .procname       = "max_burst",
 109                 .data           = &sctp_max_burst,
 110                 .maxlen         = sizeof(int),
 111                 .mode           = 0644,
 112                 .proc_handler   = proc_dointvec_minmax,
 113                 .strategy       = sysctl_intvec,
 114                 .extra1         = &zero,
 115                 .extra2         = &int_max
 116         },
 117         {
 118                 .ctl_name       = NET_SCTP_ASSOCIATION_MAX_RETRANS,
 119                 .procname       = "association_max_retrans",
 120                 .data           = &sctp_max_retrans_association,
 121                 .maxlen         = sizeof(int),
 122                 .mode           = 0644,
 123                 .proc_handler   = proc_dointvec_minmax,
 124                 .strategy       = sysctl_intvec,
 125                 .extra1         = &one,
 126                 .extra2         = &int_max
 127         },
 128         {
 129                 .ctl_name       = NET_SCTP_SNDBUF_POLICY,
 130                 .procname       = "sndbuf_policy",
 131                 .data           = &sctp_sndbuf_policy,
 132                 .maxlen         = sizeof(int),
 133                 .mode           = 0644,
 134                 .proc_handler   = proc_dointvec,
 135                 .strategy       = sysctl_intvec
 136         },
 137         {
 138                 .ctl_name       = NET_SCTP_RCVBUF_POLICY,
 139                 .procname       = "rcvbuf_policy",
 140                 .data           = &sctp_rcvbuf_policy,
 141                 .maxlen         = sizeof(int),
 142                 .mode           = 0644,
 143                 .proc_handler   = proc_dointvec,
 144                 .strategy       = sysctl_intvec
 145         },
 146         {
 147                 .ctl_name       = NET_SCTP_PATH_MAX_RETRANS,
 148                 .procname       = "path_max_retrans",
 149                 .data           = &sctp_max_retrans_path,
 150                 .maxlen         = sizeof(int),
 151                 .mode           = 0644,
 152                 .proc_handler   = proc_dointvec_minmax,
 153                 .strategy       = sysctl_intvec,
 154                 .extra1         = &one,
 155                 .extra2         = &int_max
 156         },
 157         {
 158                 .ctl_name       = NET_SCTP_MAX_INIT_RETRANSMITS,
 159                 .procname       = "max_init_retransmits",
 160                 .data           = &sctp_max_retrans_init,
 161                 .maxlen         = sizeof(int),
 162                 .mode           = 0644,
 163                 .proc_handler   = proc_dointvec_minmax,
 164                 .strategy       = sysctl_intvec,
 165                 .extra1         = &one,
 166                 .extra2         = &int_max
 167         },
 168         {
 169                 .ctl_name       = NET_SCTP_HB_INTERVAL,
 170                 .procname       = "hb_interval",
 171                 .data           = &sctp_hb_interval,
 172                 .maxlen         = sizeof(unsigned int),
 173                 .mode           = 0644,
 174                 .proc_handler   = proc_dointvec_minmax,
 175                 .strategy       = sysctl_intvec,
 176                 .extra1         = &one,
 177                 .extra2         = &timer_max
 178         },
 179         {
 180                 .ctl_name       = NET_SCTP_PRESERVE_ENABLE,
 181                 .procname       = "cookie_preserve_enable",
 182                 .data           = &sctp_cookie_preserve_enable,
 183                 .maxlen         = sizeof(int),
 184                 .mode           = 0644,
 185                 .proc_handler   = proc_dointvec,
 186                 .strategy       = sysctl_intvec
 187         },
 188         {
 189                 .ctl_name       = NET_SCTP_RTO_ALPHA,
 190                 .procname       = "rto_alpha_exp_divisor",
 191                 .data           = &sctp_rto_alpha,
 192                 .maxlen         = sizeof(int),
 193                 .mode           = 0444,
 194                 .proc_handler   = proc_dointvec,
 195                 .strategy       = sysctl_intvec
 196         },
 197         {
 198                 .ctl_name       = NET_SCTP_RTO_BETA,
 199                 .procname       = "rto_beta_exp_divisor",
 200                 .data           = &sctp_rto_beta,
 201                 .maxlen         = sizeof(int),
 202                 .mode           = 0444,
 203                 .proc_handler   = proc_dointvec,
 204                 .strategy       = sysctl_intvec
 205         },
 206         {
 207                 .ctl_name       = NET_SCTP_ADDIP_ENABLE,
 208                 .procname       = "addip_enable",
 209                 .data           = &sctp_addip_enable,
 210                 .maxlen         = sizeof(int),
 211                 .mode           = 0644,
 212                 .proc_handler   = proc_dointvec,
 213                 .strategy       = sysctl_intvec
 214         },
 215         {
 216                 .ctl_name       = NET_SCTP_PRSCTP_ENABLE,
 217                 .procname       = "prsctp_enable",
 218                 .data           = &sctp_prsctp_enable,
 219                 .maxlen         = sizeof(int),
 220                 .mode           = 0644,
 221                 .proc_handler   = proc_dointvec,
 222                 .strategy       = sysctl_intvec
 223         },
 224         {
 225                 .ctl_name       = NET_SCTP_SACK_TIMEOUT,
 226                 .procname       = "sack_timeout",
 227                 .data           = &sctp_sack_timeout,
 228                 .maxlen         = sizeof(int),
 229                 .mode           = 0644,
 230                 .proc_handler   = proc_dointvec_minmax,
 231                 .strategy       = sysctl_intvec,
 232                 .extra1         = &sack_timer_min,
 233                 .extra2         = &sack_timer_max,
 234         },
 235         {
 236                 .ctl_name       = CTL_UNNUMBERED,
 237                 .procname       = "sctp_mem",
 238                 .data           = &sysctl_sctp_mem,
 239                 .maxlen         = sizeof(sysctl_sctp_mem),
 240                 .mode           = 0644,
 241                 .proc_handler   = proc_dointvec,
 242         },
 243         {
 244                 .ctl_name       = CTL_UNNUMBERED,
 245                 .procname       = "sctp_rmem",
 246                 .data           = &sysctl_sctp_rmem,
 247                 .maxlen         = sizeof(sysctl_sctp_rmem),
 248                 .mode           = 0644,
 249                 .proc_handler   = proc_dointvec,
 250         },
 251         {
 252                 .ctl_name       = CTL_UNNUMBERED,
 253                 .procname       = "sctp_wmem",
 254                 .data           = &sysctl_sctp_wmem,
 255                 .maxlen         = sizeof(sysctl_sctp_wmem),
 256                 .mode           = 0644,
 257                 .proc_handler   = proc_dointvec,
 258         },
 259         {
 260                 .ctl_name       = CTL_UNNUMBERED,
 261                 .procname       = "auth_enable",
 262                 .data           = &sctp_auth_enable,
 263                 .maxlen         = sizeof(int),
 264                 .mode           = 0644,
 265                 .proc_handler   = proc_dointvec,
 266                 .strategy       = sysctl_intvec
 267         },
 268         {
 269                 .ctl_name       = CTL_UNNUMBERED,
 270                 .procname       = "addip_noauth_enable",
 271                 .data           = &sctp_addip_noauth,
 272                 .maxlen         = sizeof(int),
 273                 .mode           = 0644,
 274                 .proc_handler   = proc_dointvec,
 275                 .strategy       = sysctl_intvec
 276         },
 277         {
 278                 .ctl_name       = CTL_UNNUMBERED,
 279                 .procname       = "addr_scope_policy",
 280                 .data           = &sctp_scope_policy,
 281                 .maxlen         = sizeof(int),
 282                 .mode           = 0644,
 283                 .proc_handler   = &proc_dointvec_minmax,
 284                 .strategy       = &sysctl_intvec,
 285                 .extra1         = &zero,
 286                 .extra2         = &addr_scope_max,
 287         },
 288         {
 289                 .ctl_name       = CTL_UNNUMBERED,
 290                 .procname       = "rwnd_update_shift",
 291                 .data           = &sctp_rwnd_upd_shift,
 292                 .maxlen         = sizeof(int),
 293                 .mode           = 0644,
 294                 .proc_handler   = &proc_dointvec_minmax,
 295                 .strategy       = &sysctl_intvec,
 296                 .extra1         = &one,
 297                 .extra2         = &rwnd_scale_max,
 298         },
 299
 300         { .ctl_name = 0 }
 301 };
 302
 303 static struct ctl_path sctp_path[] = {
 304         { .procname = "net", .ctl_name = CTL_NET, },
 305         { .procname = "sctp", .ctl_name = NET_SCTP, },
 306         { }
 307 };
 308
 309 static struct ctl_table_header * sctp_sysctl_header;
 310
 311 /* Sysctl registration.  */
 312 void sctp_sysctl_register(void)
 313 {
 314         sctp_sysctl_header = register_sysctl_paths(sctp_path, sctp_table);
 315 }
 316
 317 /* Sysctl deregistration.  */
 318 void sctp_sysctl_unregister(void)
 319 {
 320         unregister_sysctl_table(sctp_sysctl_header);
 321 }