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