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