net/sctp/sysctl.c

   1 /* SCTP kernel reference Implementation
   2  * (C) Copyright IBM Corp. 2002, 2004
   3  * Copyright (c) 2002 Intel Corp.
   4  *
   5  * This file is part of the SCTP kernel reference Implementation
   6  *
   7  * Sysctl related interfaces for SCTP.
   8  *
   9  * The SCTP reference 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  * The SCTP reference 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 long sack_timer_min = 1;
  53 static long sack_timer_max = 500;
  54
  55 static ctl_table sctp_table[] = {
  56         {
  57                 .ctl_name       = NET_SCTP_RTO_INITIAL,
  58                 .procname       = "rto_initial",
  59                 .data           = &sctp_rto_initial,
  60                 .maxlen         = sizeof(unsigned int),
  61                 .mode           = 0644,
  62                 .proc_handler   = &proc_dointvec_minmax,
  63                 .strategy       = &sysctl_intvec,
  64                 .extra1         = &one,
  65                 .extra2         = &timer_max
  66         },
  67         {
  68                 .ctl_name       = NET_SCTP_RTO_MIN,
  69                 .procname       = "rto_min",
  70                 .data           = &sctp_rto_min,
  71                 .maxlen         = sizeof(unsigned int),
  72                 .mode           = 0644,
  73                 .proc_handler   = &proc_dointvec_minmax,
  74                 .strategy       = &sysctl_intvec,
  75                 .extra1         = &one,
  76                 .extra2         = &timer_max
  77         },
  78         {
  79                 .ctl_name       = NET_SCTP_RTO_MAX,
  80                 .procname       = "rto_max",
  81                 .data           = &sctp_rto_max,
  82                 .maxlen         = sizeof(unsigned int),
  83                 .mode           = 0644,
  84                 .proc_handler   = &proc_dointvec_minmax,
  85                 .strategy       = &sysctl_intvec,
  86                 .extra1         = &one,
  87                 .extra2         = &timer_max
  88         },
  89         {
  90                 .ctl_name       = NET_SCTP_VALID_COOKIE_LIFE,
  91                 .procname       = "valid_cookie_life",
  92                 .data           = &sctp_valid_cookie_life,
  93                 .maxlen         = sizeof(unsigned int),
  94                 .mode           = 0644,
  95                 .proc_handler   = &proc_dointvec_minmax,
  96                 .strategy       = &sysctl_intvec,
  97                 .extra1         = &one,
  98                 .extra2         = &timer_max
  99         },
 100         {
 101                 .ctl_name       = NET_SCTP_MAX_BURST,
 102                 .procname       = "max_burst",
 103                 .data           = &sctp_max_burst,
 104                 .maxlen         = sizeof(int),
 105                 .mode           = 0644,
 106                 .proc_handler   = &proc_dointvec_minmax,
 107                 .strategy       = &sysctl_intvec,
 108                 .extra1         = &zero,
 109                 .extra2         = &int_max
 110         },
 111         {
 112                 .ctl_name       = NET_SCTP_ASSOCIATION_MAX_RETRANS,
 113                 .procname       = "association_max_retrans",
 114                 .data           = &sctp_max_retrans_association,
 115                 .maxlen         = sizeof(int),
 116                 .mode           = 0644,
 117                 .proc_handler   = &proc_dointvec_minmax,
 118                 .strategy       = &sysctl_intvec,
 119                 .extra1         = &one,
 120                 .extra2         = &int_max
 121         },
 122         {
 123                 .ctl_name       = NET_SCTP_SNDBUF_POLICY,
 124                 .procname       = "sndbuf_policy",
 125                 .data           = &sctp_sndbuf_policy,
 126                 .maxlen         = sizeof(int),
 127                 .mode           = 0644,
 128                 .proc_handler   = &proc_dointvec,
 129                 .strategy       = &sysctl_intvec
 130         },
 131         {
 132                 .ctl_name       = NET_SCTP_RCVBUF_POLICY,
 133                 .procname       = "rcvbuf_policy",
 134                 .data           = &sctp_rcvbuf_policy,
 135                 .maxlen         = sizeof(int),
 136                 .mode           = 0644,
 137                 .proc_handler   = &proc_dointvec,
 138                 .strategy       = &sysctl_intvec
 139         },
 140         {
 141                 .ctl_name       = NET_SCTP_PATH_MAX_RETRANS,
 142                 .procname       = "path_max_retrans",
 143                 .data           = &sctp_max_retrans_path,
 144                 .maxlen         = sizeof(int),
 145                 .mode           = 0644,
 146                 .proc_handler   = &proc_dointvec_minmax,
 147                 .strategy       = &sysctl_intvec,
 148                 .extra1         = &one,
 149                 .extra2         = &int_max
 150         },
 151         {
 152                 .ctl_name       = NET_SCTP_MAX_INIT_RETRANSMITS,
 153                 .procname       = "max_init_retransmits",
 154                 .data           = &sctp_max_retrans_init,
 155                 .maxlen         = sizeof(int),
 156                 .mode           = 0644,
 157                 .proc_handler   = &proc_dointvec_minmax,
 158                 .strategy       = &sysctl_intvec,
 159                 .extra1         = &one,
 160                 .extra2         = &int_max
 161         },
 162         {
 163                 .ctl_name       = NET_SCTP_HB_INTERVAL,
 164                 .procname       = "hb_interval",
 165                 .data           = &sctp_hb_interval,
 166                 .maxlen         = sizeof(unsigned int),
 167                 .mode           = 0644,
 168                 .proc_handler   = &proc_dointvec_minmax,
 169                 .strategy       = &sysctl_intvec,
 170                 .extra1         = &one,
 171                 .extra2         = &timer_max
 172         },
 173         {
 174                 .ctl_name       = NET_SCTP_PRESERVE_ENABLE,
 175                 .procname       = "cookie_preserve_enable",
 176                 .data           = &sctp_cookie_preserve_enable,
 177                 .maxlen         = sizeof(int),
 178                 .mode           = 0644,
 179                 .proc_handler   = &proc_dointvec,
 180                 .strategy       = &sysctl_intvec
 181         },
 182         {
 183                 .ctl_name       = NET_SCTP_RTO_ALPHA,
 184                 .procname       = "rto_alpha_exp_divisor",
 185                 .data           = &sctp_rto_alpha,
 186                 .maxlen         = sizeof(int),
 187                 .mode           = 0444,
 188                 .proc_handler   = &proc_dointvec,
 189                 .strategy       = &sysctl_intvec
 190         },
 191         {
 192                 .ctl_name       = NET_SCTP_RTO_BETA,
 193                 .procname       = "rto_beta_exp_divisor",
 194                 .data           = &sctp_rto_beta,
 195                 .maxlen         = sizeof(int),
 196                 .mode           = 0444,
 197                 .proc_handler   = &proc_dointvec,
 198                 .strategy       = &sysctl_intvec
 199         },
 200         {
 201                 .ctl_name       = NET_SCTP_ADDIP_ENABLE,
 202                 .procname       = "addip_enable",
 203                 .data           = &sctp_addip_enable,
 204                 .maxlen         = sizeof(int),
 205                 .mode           = 0644,
 206                 .proc_handler   = &proc_dointvec,
 207                 .strategy       = &sysctl_intvec
 208         },
 209         {
 210                 .ctl_name       = NET_SCTP_PRSCTP_ENABLE,
 211                 .procname       = "prsctp_enable",
 212                 .data           = &sctp_prsctp_enable,
 213                 .maxlen         = sizeof(int),
 214                 .mode           = 0644,
 215                 .proc_handler   = &proc_dointvec,
 216                 .strategy       = &sysctl_intvec
 217         },
 218         {
 219                 .ctl_name       = NET_SCTP_SACK_TIMEOUT,
 220                 .procname       = "sack_timeout",
 221                 .data           = &sctp_sack_timeout,
 222                 .maxlen         = sizeof(long),
 223                 .mode           = 0644,
 224                 .proc_handler   = &proc_dointvec_minmax,
 225                 .strategy       = &sysctl_intvec,
 226                 .extra1         = &sack_timer_min,
 227                 .extra2         = &sack_timer_max,
 228         },
 229         { .ctl_name = 0 }
 230 };
 231
 232 static ctl_table sctp_net_table[] = {
 233         {
 234                 .ctl_name       = NET_SCTP,
 235                 .procname       = "sctp",
 236                 .mode           = 0555,
 237                 .child          = sctp_table
 238         },
 239         { .ctl_name = 0 }
 240 };
 241
 242 static ctl_table sctp_root_table[] = {
 243         {
 244                 .ctl_name       = CTL_NET,
 245                 .procname       = "net",
 246                 .mode           = 0555,
 247                 .child          = sctp_net_table
 248         },
 249         { .ctl_name = 0 }
 250 };
 251
 252 static struct ctl_table_header * sctp_sysctl_header;
 253
 254 /* Sysctl registration.  */
 255 void sctp_sysctl_register(void)
 256 {
 257         sctp_sysctl_header = register_sysctl_table(sctp_root_table);
 258 }
 259
 260 /* Sysctl deregistration.  */
 261 void sctp_sysctl_unregister(void)
 262 {
 263         unregister_sysctl_table(sctp_sysctl_header);
 264 }