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 static int addr_scope_max = 3; /* check sctp_scope_policy_t in include/net/sctp/constants.h for max entries */
  55 static int rwnd_scale_max = 16;
  56
  57 extern int sysctl_sctp_mem[3];
  58 extern int sysctl_sctp_rmem[3];
  59 extern int sysctl_sctp_wmem[3];
  60
  61 static 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
 258 static struct ctl_path sctp_path[] = {
 259         { .procname = "net", },
 260         { .procname = "sctp", },
 261         { }
 262 };
 263
 264 static struct ctl_table_header * sctp_sysctl_header;
 265
 266 /* Sysctl registration.  */
 267 void sctp_sysctl_register(void)
 268 {
 269         sctp_sysctl_header = register_sysctl_paths(sctp_path, sctp_table);
 270 }
 271
 272 /* Sysctl deregistration.  */
 273 void sctp_sysctl_unregister(void)
 274 {
 275         unregister_sysctl_table(sctp_sysctl_header);
 276 }