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 long sack_timer_min = 1;
  53static long sack_timer_max = 500;
  54
  55extern int sysctl_sctp_mem[3];
  56extern int sysctl_sctp_rmem[3];
  57extern int sysctl_sctp_wmem[3];
  58
  59static ctl_table sctp_table[] = {
  60        {
  61                .ctl_name       = NET_SCTP_RTO_INITIAL,
  62                .procname       = "rto_initial",
  63                .data           = &sctp_rto_initial,
  64                .maxlen         = sizeof(unsigned int),
  65                .mode           = 0644,
  66                .proc_handler   = proc_dointvec_minmax,
  67                .strategy       = sysctl_intvec,
  68                .extra1         = &one,
  69                .extra2         = &timer_max
  70        },
  71        {
  72                .ctl_name       = NET_SCTP_RTO_MIN,
  73                .procname       = "rto_min",
  74                .data           = &sctp_rto_min,
  75                .maxlen         = sizeof(unsigned int),
  76                .mode           = 0644,
  77                .proc_handler   = proc_dointvec_minmax,
  78                .strategy       = sysctl_intvec,
  79                .extra1         = &one,
  80                .extra2         = &timer_max
  81        },
  82        {
  83                .ctl_name       = NET_SCTP_RTO_MAX,
  84                .procname       = "rto_max",
  85                .data           = &sctp_rto_max,
  86                .maxlen         = sizeof(unsigned int),
  87                .mode           = 0644,
  88                .proc_handler   = proc_dointvec_minmax,
  89                .strategy       = sysctl_intvec,
  90                .extra1         = &one,
  91                .extra2         = &timer_max
  92        },
  93        {
  94                .ctl_name       = NET_SCTP_VALID_COOKIE_LIFE,
  95                .procname       = "valid_cookie_life",
  96                .data           = &sctp_valid_cookie_life,
  97                .maxlen         = sizeof(unsigned int),
  98                .mode           = 0644,
  99                .proc_handler   = proc_dointvec_minmax,
 100                .strategy       = sysctl_intvec,
 101                .extra1         = &one,
 102                .extra2         = &timer_max
 103        },
 104        {
 105                .ctl_name       = NET_SCTP_MAX_BURST,
 106                .procname       = "max_burst",
 107                .data           = &sctp_max_burst,
 108                .maxlen         = sizeof(int),
 109                .mode           = 0644,
 110                .proc_handler   = proc_dointvec_minmax,
 111                .strategy       = sysctl_intvec,
 112                .extra1         = &zero,
 113                .extra2         = &int_max
 114        },
 115        {
 116                .ctl_name       = NET_SCTP_ASSOCIATION_MAX_RETRANS,
 117                .procname       = "association_max_retrans",
 118                .data           = &sctp_max_retrans_association,
 119                .maxlen         = sizeof(int),
 120                .mode           = 0644,
 121                .proc_handler   = proc_dointvec_minmax,
 122                .strategy       = sysctl_intvec,
 123                .extra1         = &one,
 124                .extra2         = &int_max
 125        },
 126        {
 127                .ctl_name       = NET_SCTP_SNDBUF_POLICY,
 128                .procname       = "sndbuf_policy",
 129                .data           = &sctp_sndbuf_policy,
 130                .maxlen         = sizeof(int),
 131                .mode           = 0644,
 132                .proc_handler   = proc_dointvec,
 133                .strategy       = sysctl_intvec
 134        },
 135        {
 136                .ctl_name       = NET_SCTP_RCVBUF_POLICY,
 137                .procname       = "rcvbuf_policy",
 138                .data           = &sctp_rcvbuf_policy,
 139                .maxlen         = sizeof(int),
 140                .mode           = 0644,
 141                .proc_handler   = proc_dointvec,
 142                .strategy       = sysctl_intvec
 143        },
 144        {
 145                .ctl_name       = NET_SCTP_PATH_MAX_RETRANS,
 146                .procname       = "path_max_retrans",
 147                .data           = &sctp_max_retrans_path,
 148                .maxlen         = sizeof(int),
 149                .mode           = 0644,
 150                .proc_handler   = proc_dointvec_minmax,
 151                .strategy       = sysctl_intvec,
 152                .extra1         = &one,
 153                .extra2         = &int_max
 154        },
 155        {
 156                .ctl_name       = NET_SCTP_MAX_INIT_RETRANSMITS,
 157                .procname       = "max_init_retransmits",
 158                .data           = &sctp_max_retrans_init,
 159                .maxlen         = sizeof(int),
 160                .mode           = 0644,
 161                .proc_handler   = proc_dointvec_minmax,
 162                .strategy       = sysctl_intvec,
 163                .extra1         = &one,
 164                .extra2         = &int_max
 165        },
 166        {
 167                .ctl_name       = NET_SCTP_HB_INTERVAL,
 168                .procname       = "hb_interval",
 169                .data           = &sctp_hb_interval,
 170                .maxlen         = sizeof(unsigned int),
 171                .mode           = 0644,
 172                .proc_handler   = proc_dointvec_minmax,
 173                .strategy       = sysctl_intvec,
 174                .extra1         = &one,
 175                .extra2         = &timer_max
 176        },
 177        {
 178                .ctl_name       = NET_SCTP_PRESERVE_ENABLE,
 179                .procname       = "cookie_preserve_enable",
 180                .data           = &sctp_cookie_preserve_enable,
 181                .maxlen         = sizeof(int),
 182                .mode           = 0644,
 183                .proc_handler   = proc_dointvec,
 184                .strategy       = sysctl_intvec
 185        },
 186        {
 187                .ctl_name       = NET_SCTP_RTO_ALPHA,
 188                .procname       = "rto_alpha_exp_divisor",
 189                .data           = &sctp_rto_alpha,
 190                .maxlen         = sizeof(int),
 191                .mode           = 0444,
 192                .proc_handler   = proc_dointvec,
 193                .strategy       = sysctl_intvec
 194        },
 195        {
 196                .ctl_name       = NET_SCTP_RTO_BETA,
 197                .procname       = "rto_beta_exp_divisor",
 198                .data           = &sctp_rto_beta,
 199                .maxlen         = sizeof(int),
 200                .mode           = 0444,
 201                .proc_handler   = proc_dointvec,
 202                .strategy       = sysctl_intvec
 203        },
 204        {
 205                .ctl_name       = NET_SCTP_ADDIP_ENABLE,
 206                .procname       = "addip_enable",
 207                .data           = &sctp_addip_enable,
 208                .maxlen         = sizeof(int),
 209                .mode           = 0644,
 210                .proc_handler   = proc_dointvec,
 211                .strategy       = sysctl_intvec
 212        },
 213        {
 214                .ctl_name       = NET_SCTP_PRSCTP_ENABLE,
 215                .procname       = "prsctp_enable",
 216                .data           = &sctp_prsctp_enable,
 217                .maxlen         = sizeof(int),
 218                .mode           = 0644,
 219                .proc_handler   = proc_dointvec,
 220                .strategy       = sysctl_intvec
 221        },
 222        {
 223                .ctl_name       = NET_SCTP_SACK_TIMEOUT,
 224                .procname       = "sack_timeout",
 225                .data           = &sctp_sack_timeout,
 226                .maxlen         = sizeof(long),
 227                .mode           = 0644,
 228                .proc_handler   = proc_dointvec_minmax,
 229                .strategy       = sysctl_intvec,
 230                .extra1         = &sack_timer_min,
 231                .extra2         = &sack_timer_max,
 232        },
 233        {
 234                .ctl_name       = CTL_UNNUMBERED,
 235                .procname       = "sctp_mem",
 236                .data           = &sysctl_sctp_mem,
 237                .maxlen         = sizeof(sysctl_sctp_mem),
 238                .mode           = 0644,
 239                .proc_handler   = proc_dointvec,
 240        },
 241        {
 242                .ctl_name       = CTL_UNNUMBERED,
 243                .procname       = "sctp_rmem",
 244                .data           = &sysctl_sctp_rmem,
 245                .maxlen         = sizeof(sysctl_sctp_rmem),
 246                .mode           = 0644,
 247                .proc_handler   = proc_dointvec,
 248        },
 249        {
 250                .ctl_name       = CTL_UNNUMBERED,
 251                .procname       = "sctp_wmem",
 252                .data           = &sysctl_sctp_wmem,
 253                .maxlen         = sizeof(sysctl_sctp_wmem),
 254                .mode           = 0644,
 255                .proc_handler   = proc_dointvec,
 256        },
 257        {
 258                .ctl_name       = CTL_UNNUMBERED,
 259                .procname       = "auth_enable",
 260                .data           = &sctp_auth_enable,
 261                .maxlen         = sizeof(int),
 262                .mode           = 0644,
 263                .proc_handler   = proc_dointvec,
 264                .strategy       = sysctl_intvec
 265        },
 266        {
 267                .ctl_name       = CTL_UNNUMBERED,
 268                .procname       = "addip_noauth_enable",
 269                .data           = &sctp_addip_noauth,
 270                .maxlen         = sizeof(int),
 271                .mode           = 0644,
 272                .proc_handler   = proc_dointvec,
 273                .strategy       = sysctl_intvec
 274        },
 275        { .ctl_name = 0 }
 276};
 277
 278static struct ctl_path sctp_path[] = {
 279        { .procname = "net", .ctl_name = CTL_NET, },
 280        { .procname = "sctp", .ctl_name = NET_SCTP, },
 281        { }
 282};
 283
 284static struct ctl_table_header * sctp_sysctl_header;
 285
 286/* Sysctl registration.  */
 287void sctp_sysctl_register(void)
 288{
 289        sctp_sysctl_header = register_sysctl_paths(sctp_path, sctp_table);
 290}
 291
 292/* Sysctl deregistration.  */
 293void sctp_sysctl_unregister(void)
 294{
 295        unregister_sysctl_table(sctp_sysctl_header);
 296}
 297