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
  55 extern int sysctl_sctp_mem[3];
  56 extern int sysctl_sctp_rmem[3];
  57 extern int sysctl_sctp_wmem[3];
  58
  59 static 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(int),
 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
 278 static struct ctl_path sctp_path[] = {
 279         { .procname = "net", .ctl_name = CTL_NET, },
 280         { .procname = "sctp", .ctl_name = NET_SCTP, },
 281         { }
 282 };
 283
 284 static struct ctl_table_header * sctp_sysctl_header;
 285
 286 /* Sysctl registration.  */
 287 void sctp_sysctl_register(void)
 288 {
 289         sctp_sysctl_header = register_sysctl_paths(sctp_path, sctp_table);
 290 }
 291
 292 /* Sysctl deregistration.  */
 293 void sctp_sysctl_unregister(void)
 294 {
 295         unregister_sysctl_table(sctp_sysctl_header);
 296 }