linux/net/sctp/sysctl.c
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   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
  48static int zero = 0;
  49static int one = 1;
  50static int timer_max = 86400000; /* ms in one day */
  51static int int_max = INT_MAX;
  52static int sack_timer_min = 1;
  53static int sack_timer_max = 500;
  54static int addr_scope_max = 3; /* check sctp_scope_policy_t in include/net/sctp/constants.h for max entries */
  55static int rwnd_scale_max = 16;
  56static unsigned long max_autoclose_min = 0;
  57static unsigned long max_autoclose_max =
  58        (MAX_SCHEDULE_TIMEOUT / HZ > UINT_MAX)
  59        ? UINT_MAX : MAX_SCHEDULE_TIMEOUT / HZ;
  60
  61extern long sysctl_sctp_mem[3];
  62extern int sysctl_sctp_rmem[3];
  63extern int sysctl_sctp_wmem[3];
  64
  65static 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       = "pf_retrans",
 145                .data           = &sctp_pf_retrans,
 146                .maxlen         = sizeof(int),
 147                .mode           = 0644,
 148                .proc_handler   = proc_dointvec_minmax,
 149                .extra1         = &zero,
 150                .extra2         = &int_max
 151        },
 152        {
 153                .procname       = "max_init_retransmits",
 154                .data           = &sctp_max_retrans_init,
 155                .maxlen         = sizeof(int),
 156                .mode           = 0644,
 157                .proc_handler   = proc_dointvec_minmax,
 158                .extra1         = &one,
 159                .extra2         = &int_max
 160        },
 161        {
 162                .procname       = "hb_interval",
 163                .data           = &sctp_hb_interval,
 164                .maxlen         = sizeof(unsigned int),
 165                .mode           = 0644,
 166                .proc_handler   = proc_dointvec_minmax,
 167                .extra1         = &one,
 168                .extra2         = &timer_max
 169        },
 170        {
 171                .procname       = "cookie_preserve_enable",
 172                .data           = &sctp_cookie_preserve_enable,
 173                .maxlen         = sizeof(int),
 174                .mode           = 0644,
 175                .proc_handler   = proc_dointvec,
 176        },
 177        {
 178                .procname       = "rto_alpha_exp_divisor",
 179                .data           = &sctp_rto_alpha,
 180                .maxlen         = sizeof(int),
 181                .mode           = 0444,
 182                .proc_handler   = proc_dointvec,
 183        },
 184        {
 185                .procname       = "rto_beta_exp_divisor",
 186                .data           = &sctp_rto_beta,
 187                .maxlen         = sizeof(int),
 188                .mode           = 0444,
 189                .proc_handler   = proc_dointvec,
 190        },
 191        {
 192                .procname       = "addip_enable",
 193                .data           = &sctp_addip_enable,
 194                .maxlen         = sizeof(int),
 195                .mode           = 0644,
 196                .proc_handler   = proc_dointvec,
 197        },
 198        {
 199                .procname       = "default_auto_asconf",
 200                .data           = &sctp_default_auto_asconf,
 201                .maxlen         = sizeof(int),
 202                .mode           = 0644,
 203                .proc_handler   = proc_dointvec,
 204        },
 205        {
 206                .procname       = "prsctp_enable",
 207                .data           = &sctp_prsctp_enable,
 208                .maxlen         = sizeof(int),
 209                .mode           = 0644,
 210                .proc_handler   = proc_dointvec,
 211        },
 212        {
 213                .procname       = "sack_timeout",
 214                .data           = &sctp_sack_timeout,
 215                .maxlen         = sizeof(int),
 216                .mode           = 0644,
 217                .proc_handler   = proc_dointvec_minmax,
 218                .extra1         = &sack_timer_min,
 219                .extra2         = &sack_timer_max,
 220        },
 221        {
 222                .procname       = "sctp_mem",
 223                .data           = &sysctl_sctp_mem,
 224                .maxlen         = sizeof(sysctl_sctp_mem),
 225                .mode           = 0644,
 226                .proc_handler   = proc_doulongvec_minmax
 227        },
 228        {
 229                .procname       = "sctp_rmem",
 230                .data           = &sysctl_sctp_rmem,
 231                .maxlen         = sizeof(sysctl_sctp_rmem),
 232                .mode           = 0644,
 233                .proc_handler   = proc_dointvec,
 234        },
 235        {
 236                .procname       = "sctp_wmem",
 237                .data           = &sysctl_sctp_wmem,
 238                .maxlen         = sizeof(sysctl_sctp_wmem),
 239                .mode           = 0644,
 240                .proc_handler   = proc_dointvec,
 241        },
 242        {
 243                .procname       = "auth_enable",
 244                .data           = &sctp_auth_enable,
 245                .maxlen         = sizeof(int),
 246                .mode           = 0644,
 247                .proc_handler   = proc_dointvec,
 248        },
 249        {
 250                .procname       = "addip_noauth_enable",
 251                .data           = &sctp_addip_noauth,
 252                .maxlen         = sizeof(int),
 253                .mode           = 0644,
 254                .proc_handler   = proc_dointvec,
 255        },
 256        {
 257                .procname       = "addr_scope_policy",
 258                .data           = &sctp_scope_policy,
 259                .maxlen         = sizeof(int),
 260                .mode           = 0644,
 261                .proc_handler   = proc_dointvec_minmax,
 262                .extra1         = &zero,
 263                .extra2         = &addr_scope_max,
 264        },
 265        {
 266                .procname       = "rwnd_update_shift",
 267                .data           = &sctp_rwnd_upd_shift,
 268                .maxlen         = sizeof(int),
 269                .mode           = 0644,
 270                .proc_handler   = &proc_dointvec_minmax,
 271                .extra1         = &one,
 272                .extra2         = &rwnd_scale_max,
 273        },
 274        {
 275                .procname       = "max_autoclose",
 276                .data           = &sctp_max_autoclose,
 277                .maxlen         = sizeof(unsigned long),
 278                .mode           = 0644,
 279                .proc_handler   = &proc_doulongvec_minmax,
 280                .extra1         = &max_autoclose_min,
 281                .extra2         = &max_autoclose_max,
 282        },
 283
 284        { /* sentinel */ }
 285};
 286
 287static struct ctl_table_header * sctp_sysctl_header;
 288
 289/* Sysctl registration.  */
 290void sctp_sysctl_register(void)
 291{
 292        sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table);
 293}
 294
 295/* Sysctl deregistration.  */
 296void sctp_sysctl_unregister(void)
 297{
 298        unregister_net_sysctl_table(sctp_sysctl_header);
 299}
 300
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