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