net/ipv4/sysctl_net_ipv4.c

   1 /*
   2  * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
   3  *
   4  * $Id: sysctl_net_ipv4.c,v 1.50 2001/10/20 00:00:11 davem Exp $
   5  *
   6  * Begun April 1, 1996, Mike Shaver.
   7  * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
   8  */
   9
  10 #include <linux/mm.h>
  11 #include <linux/module.h>
  12 #include <linux/sysctl.h>
  13 #include <linux/config.h>
  14 #include <net/snmp.h>
  15 #include <net/ip.h>
  16 #include <net/route.h>
  17 #include <net/tcp.h>
  18
  19 /* From af_inet.c */
  20 extern int sysctl_ip_nonlocal_bind;
  21
  22 /* From icmp.c */
  23 extern int sysctl_icmp_echo_ignore_all;
  24 extern int sysctl_icmp_echo_ignore_broadcasts;
  25 extern int sysctl_icmp_ignore_bogus_error_responses;
  26
  27 /* From ip_fragment.c */
  28 extern int sysctl_ipfrag_low_thresh;
  29 extern int sysctl_ipfrag_high_thresh;
  30 extern int sysctl_ipfrag_time;
  31 extern int sysctl_ipfrag_secret_interval;
  32
  33 /* From ip_output.c */
  34 extern int sysctl_ip_dynaddr;
  35
  36 /* From icmp.c */
  37 extern int sysctl_icmp_ratelimit;
  38 extern int sysctl_icmp_ratemask;
  39
  40 /* From igmp.c */
  41 extern int sysctl_igmp_max_memberships;
  42 extern int sysctl_igmp_max_msf;
  43
  44 /* From inetpeer.c */
  45 extern int inet_peer_threshold;
  46 extern int inet_peer_minttl;
  47 extern int inet_peer_maxttl;
  48 extern int inet_peer_gc_mintime;
  49 extern int inet_peer_gc_maxtime;
  50
  51 #ifdef CONFIG_SYSCTL
  52 static int tcp_retr1_max = 255;
  53 static int ip_local_port_range_min[] = { 1, 1 };
  54 static int ip_local_port_range_max[] = { 65535, 65535 };
  55 #endif
  56
  57 struct ipv4_config ipv4_config;
  58
  59 extern ctl_table ipv4_route_table[];
  60
  61 #ifdef CONFIG_SYSCTL
  62
  63 static
  64 int ipv4_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
  65                         void __user *buffer, size_t *lenp)
  66 {
  67         int val = ipv4_devconf.forwarding;
  68         int ret;
  69
  70         ret = proc_dointvec(ctl, write, filp, buffer, lenp);
  71
  72         if (write && ipv4_devconf.forwarding != val)
  73                 inet_forward_change();
  74
  75         return ret;
  76 }
  77
  78 static int ipv4_sysctl_forward_strategy(ctl_table *table,
  79                          int __user *name, int nlen,
  80                          void __user *oldval, size_t __user *oldlenp,
  81                          void __user *newval, size_t newlen,
  82                          void **context)
  83 {
  84         int *valp = table->data;
  85         int new;
  86
  87         if (!newval || !newlen)
  88                 return 0;
  89
  90         if (newlen != sizeof(int))
  91                 return -EINVAL;
  92
  93         if (get_user(new, (int __user *)newval))
  94                 return -EFAULT;
  95
  96         if (new == *valp)
  97                 return 0;
  98
  99         if (oldval && oldlenp) {
 100                 size_t len;
 101
 102                 if (get_user(len, oldlenp))
 103                         return -EFAULT;
 104
 105                 if (len) {
 106                         if (len > table->maxlen)
 107                                 len = table->maxlen;
 108                         if (copy_to_user(oldval, valp, len))
 109                                 return -EFAULT;
 110                         if (put_user(len, oldlenp))
 111                                 return -EFAULT;
 112                 }
 113         }
 114
 115         *valp = new;
 116         inet_forward_change();
 117         return 1;
 118 }
 119
 120 ctl_table ipv4_table[] = {
 121         {
 122                 .ctl_name       = NET_IPV4_TCP_TIMESTAMPS,
 123                 .procname       = "tcp_timestamps",
 124                 .data           = &sysctl_tcp_timestamps,
 125                 .maxlen         = sizeof(int),
 126                 .mode           = 0644,
 127                 .proc_handler   = &proc_dointvec
 128         },
 129         {
 130                 .ctl_name       = NET_IPV4_TCP_WINDOW_SCALING,
 131                 .procname       = "tcp_window_scaling",
 132                 .data           = &sysctl_tcp_window_scaling,
 133                 .maxlen         = sizeof(int),
 134                 .mode           = 0644,
 135                 .proc_handler   = &proc_dointvec
 136         },
 137         {
 138                 .ctl_name       = NET_IPV4_TCP_SACK,
 139                 .procname       = "tcp_sack",
 140                 .data           = &sysctl_tcp_sack,
 141                 .maxlen         = sizeof(int),
 142                 .mode           = 0644,
 143                 .proc_handler   = &proc_dointvec
 144         },
 145         {
 146                 .ctl_name       = NET_IPV4_TCP_RETRANS_COLLAPSE,
 147                 .procname       = "tcp_retrans_collapse",
 148                 .data           = &sysctl_tcp_retrans_collapse,
 149                 .maxlen         = sizeof(int),
 150                 .mode           = 0644,
 151                 .proc_handler   = &proc_dointvec
 152         },
 153         {
 154                 .ctl_name       = NET_IPV4_FORWARD,
 155                 .procname       = "ip_forward",
 156                 .data           = &ipv4_devconf.forwarding,
 157                 .maxlen         = sizeof(int),
 158                 .mode           = 0644,
 159                 .proc_handler   = &ipv4_sysctl_forward,
 160                 .strategy       = &ipv4_sysctl_forward_strategy
 161         },
 162         {
 163                 .ctl_name       = NET_IPV4_DEFAULT_TTL,
 164                 .procname       = "ip_default_ttl",
 165                 .data           = &sysctl_ip_default_ttl,
 166                 .maxlen         = sizeof(int),
 167                 .mode           = 0644,
 168                 .proc_handler   = &ipv4_doint_and_flush,
 169                 .strategy       = &ipv4_doint_and_flush_strategy,
 170         },
 171         {
 172                 .ctl_name       = NET_IPV4_AUTOCONFIG,
 173                 .procname       = "ip_autoconfig",
 174                 .data           = &ipv4_config.autoconfig,
 175                 .maxlen         = sizeof(int),
 176                 .mode           = 0644,
 177                 .proc_handler   = &proc_dointvec
 178         },
 179         {
 180                 .ctl_name       = NET_IPV4_NO_PMTU_DISC,
 181                 .procname       = "ip_no_pmtu_disc",
 182                 .data           = &ipv4_config.no_pmtu_disc,
 183                 .maxlen         = sizeof(int),
 184                 .mode           = 0644,
 185                 .proc_handler   = &proc_dointvec
 186         },
 187         {
 188                 .ctl_name       = NET_IPV4_NONLOCAL_BIND,
 189                 .procname       = "ip_nonlocal_bind",
 190                 .data           = &sysctl_ip_nonlocal_bind,
 191                 .maxlen         = sizeof(int),
 192                 .mode           = 0644,
 193                 .proc_handler   = &proc_dointvec
 194         },
 195         {
 196                 .ctl_name       = NET_IPV4_TCP_SYN_RETRIES,
 197                 .procname       = "tcp_syn_retries",
 198                 .data           = &sysctl_tcp_syn_retries,
 199                 .maxlen         = sizeof(int),
 200                 .mode           = 0644,
 201                 .proc_handler   = &proc_dointvec
 202         },
 203         {
 204                 .ctl_name       = NET_TCP_SYNACK_RETRIES,
 205                 .procname       = "tcp_synack_retries",
 206                 .data           = &sysctl_tcp_synack_retries,
 207                 .maxlen         = sizeof(int),
 208                 .mode           = 0644,
 209                 .proc_handler   = &proc_dointvec
 210         },
 211         {
 212                 .ctl_name       = NET_TCP_MAX_ORPHANS,
 213                 .procname       = "tcp_max_orphans",
 214                 .data           = &sysctl_tcp_max_orphans,
 215                 .maxlen         = sizeof(int),
 216                 .mode           = 0644,
 217                 .proc_handler   = &proc_dointvec
 218         },
 219         {
 220                 .ctl_name       = NET_TCP_MAX_TW_BUCKETS,
 221                 .procname       = "tcp_max_tw_buckets",
 222                 .data           = &sysctl_tcp_max_tw_buckets,
 223                 .maxlen         = sizeof(int),
 224                 .mode           = 0644,
 225                 .proc_handler   = &proc_dointvec
 226         },
 227         {
 228                 .ctl_name       = NET_IPV4_IPFRAG_HIGH_THRESH,
 229                 .procname       = "ipfrag_high_thresh",
 230                 .data           = &sysctl_ipfrag_high_thresh,
 231                 .maxlen         = sizeof(int),
 232                 .mode           = 0644,
 233                 .proc_handler   = &proc_dointvec
 234         },
 235         {
 236                 .ctl_name       = NET_IPV4_IPFRAG_LOW_THRESH,
 237                 .procname       = "ipfrag_low_thresh",
 238                 .data           = &sysctl_ipfrag_low_thresh,
 239                 .maxlen         = sizeof(int),
 240                 .mode           = 0644,
 241                 .proc_handler   = &proc_dointvec
 242         },
 243         {
 244                 .ctl_name       = NET_IPV4_DYNADDR,
 245                 .procname       = "ip_dynaddr",
 246                 .data           = &sysctl_ip_dynaddr,
 247                 .maxlen         = sizeof(int),
 248                 .mode           = 0644,
 249                 .proc_handler   = &proc_dointvec
 250         },
 251         {
 252                 .ctl_name       = NET_IPV4_IPFRAG_TIME,
 253                 .procname       = "ipfrag_time",
 254                 .data           = &sysctl_ipfrag_time,
 255                 .maxlen         = sizeof(int),
 256                 .mode           = 0644,
 257                 .proc_handler   = &proc_dointvec_jiffies,
 258                 .strategy       = &sysctl_jiffies
 259         },
 260         {
 261                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_TIME,
 262                 .procname       = "tcp_keepalive_time",
 263                 .data           = &sysctl_tcp_keepalive_time,
 264                 .maxlen         = sizeof(int),
 265                 .mode           = 0644,
 266                 .proc_handler   = &proc_dointvec_jiffies,
 267                 .strategy       = &sysctl_jiffies
 268         },
 269         {
 270                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_PROBES,
 271                 .procname       = "tcp_keepalive_probes",
 272                 .data           = &sysctl_tcp_keepalive_probes,
 273                 .maxlen         = sizeof(int),
 274                 .mode           = 0644,
 275                 .proc_handler   = &proc_dointvec
 276         },
 277         {
 278                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_INTVL,
 279                 .procname       = "tcp_keepalive_intvl",
 280                 .data           = &sysctl_tcp_keepalive_intvl,
 281                 .maxlen         = sizeof(int),
 282                 .mode           = 0644,
 283                 .proc_handler   = &proc_dointvec_jiffies,
 284                 .strategy       = &sysctl_jiffies
 285         },
 286         {
 287                 .ctl_name       = NET_IPV4_TCP_RETRIES1,
 288                 .procname       = "tcp_retries1",
 289                 .data           = &sysctl_tcp_retries1,
 290                 .maxlen         = sizeof(int),
 291                 .mode           = 0644,
 292                 .proc_handler   = &proc_dointvec_minmax,
 293                 .strategy       = &sysctl_intvec,
 294                 .extra2         = &tcp_retr1_max
 295         },
 296         {
 297                 .ctl_name       = NET_IPV4_TCP_RETRIES2,
 298                 .procname       = "tcp_retries2",
 299                 .data           = &sysctl_tcp_retries2,
 300                 .maxlen         = sizeof(int),
 301                 .mode           = 0644,
 302                 .proc_handler   = &proc_dointvec
 303         },
 304         {
 305                 .ctl_name       = NET_IPV4_TCP_FIN_TIMEOUT,
 306                 .procname       = "tcp_fin_timeout",
 307                 .data           = &sysctl_tcp_fin_timeout,
 308                 .maxlen         = sizeof(int),
 309                 .mode           = 0644,
 310                 .proc_handler   = &proc_dointvec_jiffies,
 311                 .strategy       = &sysctl_jiffies
 312         },
 313 #ifdef CONFIG_SYN_COOKIES
 314         {
 315                 .ctl_name       = NET_TCP_SYNCOOKIES,
 316                 .procname       = "tcp_syncookies",
 317                 .data           = &sysctl_tcp_syncookies,
 318                 .maxlen         = sizeof(int),
 319                 .mode           = 0644,
 320                 .proc_handler   = &proc_dointvec
 321         },
 322 #endif
 323         {
 324                 .ctl_name       = NET_TCP_TW_RECYCLE,
 325                 .procname       = "tcp_tw_recycle",
 326                 .data           = &sysctl_tcp_tw_recycle,
 327                 .maxlen         = sizeof(int),
 328                 .mode           = 0644,
 329                 .proc_handler   = &proc_dointvec
 330         },
 331         {
 332                 .ctl_name       = NET_TCP_ABORT_ON_OVERFLOW,
 333                 .procname       = "tcp_abort_on_overflow",
 334                 .data           = &sysctl_tcp_abort_on_overflow,
 335                 .maxlen         = sizeof(int),
 336                 .mode           = 0644,
 337                 .proc_handler   = &proc_dointvec
 338         },
 339         {
 340                 .ctl_name       = NET_TCP_STDURG,
 341                 .procname       = "tcp_stdurg",
 342                 .data           = &sysctl_tcp_stdurg,
 343                 .maxlen         = sizeof(int),
 344                 .mode           = 0644,
 345                 .proc_handler   = &proc_dointvec
 346         },
 347         {
 348                 .ctl_name       = NET_TCP_RFC1337,
 349                 .procname       = "tcp_rfc1337",
 350                 .data           = &sysctl_tcp_rfc1337,
 351                 .maxlen         = sizeof(int),
 352                 .mode           = 0644,
 353                 .proc_handler   = &proc_dointvec
 354         },
 355         {
 356                 .ctl_name       = NET_TCP_MAX_SYN_BACKLOG,
 357                 .procname       = "tcp_max_syn_backlog",
 358                 .data           = &sysctl_max_syn_backlog,
 359                 .maxlen         = sizeof(int),
 360                 .mode           = 0644,
 361                 .proc_handler   = &proc_dointvec
 362         },
 363         {
 364                 .ctl_name       = NET_IPV4_LOCAL_PORT_RANGE,
 365                 .procname       = "ip_local_port_range",
 366                 .data           = &sysctl_local_port_range,
 367                 .maxlen         = sizeof(sysctl_local_port_range),
 368                 .mode           = 0644,
 369                 .proc_handler   = &proc_dointvec_minmax,
 370                 .strategy       = &sysctl_intvec,
 371                 .extra1         = ip_local_port_range_min,
 372                 .extra2         = ip_local_port_range_max
 373         },
 374         {
 375                 .ctl_name       = NET_IPV4_ICMP_ECHO_IGNORE_ALL,
 376                 .procname       = "icmp_echo_ignore_all",
 377                 .data           = &sysctl_icmp_echo_ignore_all,
 378                 .maxlen         = sizeof(int),
 379                 .mode           = 0644,
 380                 .proc_handler   = &proc_dointvec
 381         },
 382         {
 383                 .ctl_name       = NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,
 384                 .procname       = "icmp_echo_ignore_broadcasts",
 385                 .data           = &sysctl_icmp_echo_ignore_broadcasts,
 386                 .maxlen         = sizeof(int),
 387                 .mode           = 0644,
 388                 .proc_handler   = &proc_dointvec
 389         },
 390         {
 391                 .ctl_name       = NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
 392                 .procname       = "icmp_ignore_bogus_error_responses",
 393                 .data           = &sysctl_icmp_ignore_bogus_error_responses,
 394                 .maxlen         = sizeof(int),
 395                 .mode           = 0644,
 396                 .proc_handler   = &proc_dointvec
 397         },
 398         {
 399                 .ctl_name       = NET_IPV4_ROUTE,
 400                 .procname       = "route",
 401                 .maxlen         = 0,
 402                 .mode           = 0555,
 403                 .child          = ipv4_route_table
 404         },
 405 #ifdef CONFIG_IP_MULTICAST
 406         {
 407                 .ctl_name       = NET_IPV4_IGMP_MAX_MEMBERSHIPS,
 408                 .procname       = "igmp_max_memberships",
 409                 .data           = &sysctl_igmp_max_memberships,
 410                 .maxlen         = sizeof(int),
 411                 .mode           = 0644,
 412                 .proc_handler   = &proc_dointvec
 413         },
 414
 415 #endif
 416         {
 417                 .ctl_name       = NET_IPV4_IGMP_MAX_MSF,
 418                 .procname       = "igmp_max_msf",
 419                 .data           = &sysctl_igmp_max_msf,
 420                 .maxlen         = sizeof(int),
 421                 .mode           = 0644,
 422                 .proc_handler   = &proc_dointvec
 423         },
 424         {
 425                 .ctl_name       = NET_IPV4_INET_PEER_THRESHOLD,
 426                 .procname       = "inet_peer_threshold",
 427                 .data           = &inet_peer_threshold,
 428                 .maxlen         = sizeof(int),
 429                 .mode           = 0644,
 430                 .proc_handler   = &proc_dointvec
 431         },
 432         {
 433                 .ctl_name       = NET_IPV4_INET_PEER_MINTTL,
 434                 .procname       = "inet_peer_minttl",
 435                 .data           = &inet_peer_minttl,
 436                 .maxlen         = sizeof(int),
 437                 .mode           = 0644,
 438                 .proc_handler   = &proc_dointvec_jiffies,
 439                 .strategy       = &sysctl_jiffies
 440         },
 441         {
 442                 .ctl_name       = NET_IPV4_INET_PEER_MAXTTL,
 443                 .procname       = "inet_peer_maxttl",
 444                 .data           = &inet_peer_maxttl,
 445                 .maxlen         = sizeof(int),
 446                 .mode           = 0644,
 447                 .proc_handler   = &proc_dointvec_jiffies,
 448                 .strategy       = &sysctl_jiffies
 449         },
 450         {
 451                 .ctl_name       = NET_IPV4_INET_PEER_GC_MINTIME,
 452                 .procname       = "inet_peer_gc_mintime",
 453                 .data           = &inet_peer_gc_mintime,
 454                 .maxlen         = sizeof(int),
 455                 .mode           = 0644,
 456                 .proc_handler   = &proc_dointvec_jiffies,
 457                 .strategy       = &sysctl_jiffies
 458         },
 459         {
 460                 .ctl_name       = NET_IPV4_INET_PEER_GC_MAXTIME,
 461                 .procname       = "inet_peer_gc_maxtime",
 462                 .data           = &inet_peer_gc_maxtime,
 463                 .maxlen         = sizeof(int),
 464                 .mode           = 0644,
 465                 .proc_handler   = &proc_dointvec_jiffies,
 466                 .strategy       = &sysctl_jiffies
 467         },
 468         {
 469                 .ctl_name       = NET_TCP_ORPHAN_RETRIES,
 470                 .procname       = "tcp_orphan_retries",
 471                 .data           = &sysctl_tcp_orphan_retries,
 472                 .maxlen         = sizeof(int),
 473                 .mode           = 0644,
 474                 .proc_handler   = &proc_dointvec
 475         },
 476         {
 477                 .ctl_name       = NET_TCP_FACK,
 478                 .procname       = "tcp_fack",
 479                 .data           = &sysctl_tcp_fack,
 480                 .maxlen         = sizeof(int),
 481                 .mode           = 0644,
 482                 .proc_handler   = &proc_dointvec
 483         },
 484         {
 485                 .ctl_name       = NET_TCP_REORDERING,
 486                 .procname       = "tcp_reordering",
 487                 .data           = &sysctl_tcp_reordering,
 488                 .maxlen         = sizeof(int),
 489                 .mode           = 0644,
 490                 .proc_handler   = &proc_dointvec
 491         },
 492         {
 493                 .ctl_name       = NET_TCP_ECN,
 494                 .procname       = "tcp_ecn",
 495                 .data           = &sysctl_tcp_ecn,
 496                 .maxlen         = sizeof(int),
 497                 .mode           = 0644,
 498                 .proc_handler   = &proc_dointvec
 499         },
 500         {
 501                 .ctl_name       = NET_TCP_DSACK,
 502                 .procname       = "tcp_dsack",
 503                 .data           = &sysctl_tcp_dsack,
 504                 .maxlen         = sizeof(int),
 505                 .mode           = 0644,
 506                 .proc_handler   = &proc_dointvec
 507         },
 508         {
 509                 .ctl_name       = NET_TCP_MEM,
 510                 .procname       = "tcp_mem",
 511                 .data           = &sysctl_tcp_mem,
 512                 .maxlen         = sizeof(sysctl_tcp_mem),
 513                 .mode           = 0644,
 514                 .proc_handler   = &proc_dointvec
 515         },
 516         {
 517                 .ctl_name       = NET_TCP_WMEM,
 518                 .procname       = "tcp_wmem",
 519                 .data           = &sysctl_tcp_wmem,
 520                 .maxlen         = sizeof(sysctl_tcp_wmem),
 521                 .mode           = 0644,
 522                 .proc_handler   = &proc_dointvec
 523         },
 524         {
 525                 .ctl_name       = NET_TCP_RMEM,
 526                 .procname       = "tcp_rmem",
 527                 .data           = &sysctl_tcp_rmem,
 528                 .maxlen         = sizeof(sysctl_tcp_rmem),
 529                 .mode           = 0644,
 530                 .proc_handler   = &proc_dointvec
 531         },
 532         {
 533                 .ctl_name       = NET_TCP_APP_WIN,
 534                 .procname       = "tcp_app_win",
 535                 .data           = &sysctl_tcp_app_win,
 536                 .maxlen         = sizeof(int),
 537                 .mode           = 0644,
 538                 .proc_handler   = &proc_dointvec
 539         },
 540         {
 541                 .ctl_name       = NET_TCP_ADV_WIN_SCALE,
 542                 .procname       = "tcp_adv_win_scale",
 543                 .data           = &sysctl_tcp_adv_win_scale,
 544                 .maxlen         = sizeof(int),
 545                 .mode           = 0644,
 546                 .proc_handler   = &proc_dointvec
 547         },
 548         {
 549                 .ctl_name       = NET_IPV4_ICMP_RATELIMIT,
 550                 .procname       = "icmp_ratelimit",
 551                 .data           = &sysctl_icmp_ratelimit,
 552                 .maxlen         = sizeof(int),
 553                 .mode           = 0644,
 554                 .proc_handler   = &proc_dointvec
 555         },
 556         {
 557                 .ctl_name       = NET_IPV4_ICMP_RATEMASK,
 558                 .procname       = "icmp_ratemask",
 559                 .data           = &sysctl_icmp_ratemask,
 560                 .maxlen         = sizeof(int),
 561                 .mode           = 0644,
 562                 .proc_handler   = &proc_dointvec
 563         },
 564         {
 565                 .ctl_name       = NET_TCP_TW_REUSE,
 566                 .procname       = "tcp_tw_reuse",
 567                 .data           = &sysctl_tcp_tw_reuse,
 568                 .maxlen         = sizeof(int),
 569                 .mode           = 0644,
 570                 .proc_handler   = &proc_dointvec
 571         },
 572         {
 573                 .ctl_name       = NET_TCP_FRTO,
 574                 .procname       = "tcp_frto",
 575                 .data           = &sysctl_tcp_frto,
 576                 .maxlen         = sizeof(int),
 577                 .mode           = 0644,
 578                 .proc_handler   = &proc_dointvec
 579         },
 580         {
 581                 .ctl_name       = NET_TCP_LOW_LATENCY,
 582                 .procname       = "tcp_low_latency",
 583                 .data           = &sysctl_tcp_low_latency,
 584                 .maxlen         = sizeof(int),
 585                 .mode           = 0644,
 586                 .proc_handler   = &proc_dointvec
 587         },
 588         {
 589                 .ctl_name       = NET_IPV4_IPFRAG_SECRET_INTERVAL,
 590                 .procname       = "ipfrag_secret_interval",
 591                 .data           = &sysctl_ipfrag_secret_interval,
 592                 .maxlen         = sizeof(int),
 593                 .mode           = 0644,
 594                 .proc_handler   = &proc_dointvec_jiffies,
 595                 .strategy       = &sysctl_jiffies
 596         },
 597         {
 598                 .ctl_name       = NET_TCP_NO_METRICS_SAVE,
 599                 .procname       = "tcp_no_metrics_save",
 600                 .data           = &sysctl_tcp_nometrics_save,
 601                 .maxlen         = sizeof(int),
 602                 .mode           = 0644,
 603                 .proc_handler   = &proc_dointvec,
 604         },
 605         {
 606                 .ctl_name       = NET_TCP_WESTWOOD,
 607                 .procname       = "tcp_westwood",
 608                 .data           = &sysctl_tcp_westwood,
 609                 .maxlen         = sizeof(int),
 610                 .mode           = 0644,
 611                 .proc_handler   = &proc_dointvec,
 612         },
 613         {
 614                 .ctl_name       = NET_TCP_VEGAS,
 615                 .procname       = "tcp_vegas_cong_avoid",
 616                 .data           = &sysctl_tcp_vegas_cong_avoid,
 617                 .maxlen         = sizeof(int),
 618                 .mode           = 0644,
 619                 .proc_handler   = &proc_dointvec,
 620         },
 621         {
 622                 .ctl_name       = NET_TCP_VEGAS_ALPHA,
 623                 .procname       = "tcp_vegas_alpha",
 624                 .data           = &sysctl_tcp_vegas_alpha,
 625                 .maxlen         = sizeof(int),
 626                 .mode           = 0644,
 627                 .proc_handler   = &proc_dointvec,
 628         },
 629         {
 630                 .ctl_name       = NET_TCP_VEGAS_BETA,
 631                 .procname       = "tcp_vegas_beta",
 632                 .data           = &sysctl_tcp_vegas_beta,
 633                 .maxlen         = sizeof(int),
 634                 .mode           = 0644,
 635                 .proc_handler   = &proc_dointvec,
 636         },
 637         {
 638                 .ctl_name       = NET_TCP_VEGAS_GAMMA,
 639                 .procname       = "tcp_vegas_gamma",
 640                 .data           = &sysctl_tcp_vegas_gamma,
 641                 .maxlen         = sizeof(int),
 642                 .mode           = 0644,
 643                 .proc_handler   = &proc_dointvec,
 644         },
 645         {
 646                 .ctl_name       = NET_TCP_BIC,
 647                 .procname       = "tcp_bic",
 648                 .data           = &sysctl_tcp_bic,
 649                 .maxlen         = sizeof(int),
 650                 .mode           = 0644,
 651                 .proc_handler   = &proc_dointvec,
 652         },
 653         {
 654                 .ctl_name       = NET_TCP_BIC_FAST_CONVERGENCE,
 655                 .procname       = "tcp_bic_fast_convergence",
 656                 .data           = &sysctl_tcp_bic_fast_convergence,
 657                 .maxlen         = sizeof(int),
 658                 .mode           = 0644,
 659                 .proc_handler   = &proc_dointvec,
 660         },
 661         {
 662                 .ctl_name       = NET_TCP_BIC_LOW_WINDOW,
 663                 .procname       = "tcp_bic_low_window",
 664                 .data           = &sysctl_tcp_bic_low_window,
 665                 .maxlen         = sizeof(int),
 666                 .mode           = 0644,
 667                 .proc_handler   = &proc_dointvec,
 668         },
 669         {
 670                 .ctl_name       = NET_TCP_DEFAULT_WIN_SCALE,
 671                 .procname       = "tcp_default_win_scale",
 672                 .data           = &sysctl_tcp_default_win_scale,
 673                 .maxlen         = sizeof(int),
 674                 .mode           = 0644,
 675                 .proc_handler   = &proc_dointvec,
 676         },
 677         {
 678                 .ctl_name       = NET_TCP_MODERATE_RCVBUF,
 679                 .procname       = "tcp_moderate_rcvbuf",
 680                 .data           = &sysctl_tcp_moderate_rcvbuf,
 681                 .maxlen         = sizeof(int),
 682                 .mode           = 0644,
 683                 .proc_handler   = &proc_dointvec,
 684         },
 685         { .ctl_name = 0 }
 686 };
 687
 688 #endif /* CONFIG_SYSCTL */
 689
 690 EXPORT_SYMBOL(ipv4_config);