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 extern int sysctl_icmp_errors_use_inbound_ifaddr;
  27
  28 /* From ip_fragment.c */
  29 extern int sysctl_ipfrag_low_thresh;
  30 extern int sysctl_ipfrag_high_thresh;
  31 extern int sysctl_ipfrag_time;
  32 extern int sysctl_ipfrag_secret_interval;
  33
  34 /* From ip_output.c */
  35 extern int sysctl_ip_dynaddr;
  36
  37 /* From icmp.c */
  38 extern int sysctl_icmp_ratelimit;
  39 extern int sysctl_icmp_ratemask;
  40
  41 /* From igmp.c */
  42 extern int sysctl_igmp_max_memberships;
  43 extern int sysctl_igmp_max_msf;
  44
  45 /* From inetpeer.c */
  46 extern int inet_peer_threshold;
  47 extern int inet_peer_minttl;
  48 extern int inet_peer_maxttl;
  49 extern int inet_peer_gc_mintime;
  50 extern int inet_peer_gc_maxtime;
  51
  52 #ifdef CONFIG_SYSCTL
  53 static int tcp_retr1_max = 255;
  54 static int ip_local_port_range_min[] = { 1, 1 };
  55 static int ip_local_port_range_max[] = { 65535, 65535 };
  56 #endif
  57
  58 struct ipv4_config ipv4_config;
  59
  60 extern ctl_table ipv4_route_table[];
  61
  62 #ifdef CONFIG_SYSCTL
  63
  64 static
  65 int ipv4_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
  66                         void __user *buffer, size_t *lenp, loff_t *ppos)
  67 {
  68         int val = ipv4_devconf.forwarding;
  69         int ret;
  70
  71         ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
  72
  73         if (write && ipv4_devconf.forwarding != val)
  74                 inet_forward_change();
  75
  76         return ret;
  77 }
  78
  79 static int ipv4_sysctl_forward_strategy(ctl_table *table,
  80                          int __user *name, int nlen,
  81                          void __user *oldval, size_t __user *oldlenp,
  82                          void __user *newval, size_t newlen,
  83                          void **context)
  84 {
  85         int *valp = table->data;
  86         int new;
  87
  88         if (!newval || !newlen)
  89                 return 0;
  90
  91         if (newlen != sizeof(int))
  92                 return -EINVAL;
  93
  94         if (get_user(new, (int __user *)newval))
  95                 return -EFAULT;
  96
  97         if (new == *valp)
  98                 return 0;
  99
 100         if (oldval && oldlenp) {
 101                 size_t len;
 102
 103                 if (get_user(len, oldlenp))
 104                         return -EFAULT;
 105
 106                 if (len) {
 107                         if (len > table->maxlen)
 108                                 len = table->maxlen;
 109                         if (copy_to_user(oldval, valp, len))
 110                                 return -EFAULT;
 111                         if (put_user(len, oldlenp))
 112                                 return -EFAULT;
 113                 }
 114         }
 115
 116         *valp = new;
 117         inet_forward_change();
 118         return 1;
 119 }
 120
 121 ctl_table ipv4_table[] = {
 122         {
 123                 .ctl_name       = NET_IPV4_TCP_TIMESTAMPS,
 124                 .procname       = "tcp_timestamps",
 125                 .data           = &sysctl_tcp_timestamps,
 126                 .maxlen         = sizeof(int),
 127                 .mode           = 0644,
 128                 .proc_handler   = &proc_dointvec
 129         },
 130         {
 131                 .ctl_name       = NET_IPV4_TCP_WINDOW_SCALING,
 132                 .procname       = "tcp_window_scaling",
 133                 .data           = &sysctl_tcp_window_scaling,
 134                 .maxlen         = sizeof(int),
 135                 .mode           = 0644,
 136                 .proc_handler   = &proc_dointvec
 137         },
 138         {
 139                 .ctl_name       = NET_IPV4_TCP_SACK,
 140                 .procname       = "tcp_sack",
 141                 .data           = &sysctl_tcp_sack,
 142                 .maxlen         = sizeof(int),
 143                 .mode           = 0644,
 144                 .proc_handler   = &proc_dointvec
 145         },
 146         {
 147                 .ctl_name       = NET_IPV4_TCP_RETRANS_COLLAPSE,
 148                 .procname       = "tcp_retrans_collapse",
 149                 .data           = &sysctl_tcp_retrans_collapse,
 150                 .maxlen         = sizeof(int),
 151                 .mode           = 0644,
 152                 .proc_handler   = &proc_dointvec
 153         },
 154         {
 155                 .ctl_name       = NET_IPV4_FORWARD,
 156                 .procname       = "ip_forward",
 157                 .data           = &ipv4_devconf.forwarding,
 158                 .maxlen         = sizeof(int),
 159                 .mode           = 0644,
 160                 .proc_handler   = &ipv4_sysctl_forward,
 161                 .strategy       = &ipv4_sysctl_forward_strategy
 162         },
 163         {
 164                 .ctl_name       = NET_IPV4_DEFAULT_TTL,
 165                 .procname       = "ip_default_ttl",
 166                 .data           = &sysctl_ip_default_ttl,
 167                 .maxlen         = sizeof(int),
 168                 .mode           = 0644,
 169                 .proc_handler   = &ipv4_doint_and_flush,
 170                 .strategy       = &ipv4_doint_and_flush_strategy,
 171         },
 172         {
 173                 .ctl_name       = NET_IPV4_AUTOCONFIG,
 174                 .procname       = "ip_autoconfig",
 175                 .data           = &ipv4_config.autoconfig,
 176                 .maxlen         = sizeof(int),
 177                 .mode           = 0644,
 178                 .proc_handler   = &proc_dointvec
 179         },
 180         {
 181                 .ctl_name       = NET_IPV4_NO_PMTU_DISC,
 182                 .procname       = "ip_no_pmtu_disc",
 183                 .data           = &ipv4_config.no_pmtu_disc,
 184                 .maxlen         = sizeof(int),
 185                 .mode           = 0644,
 186                 .proc_handler   = &proc_dointvec
 187         },
 188         {
 189                 .ctl_name       = NET_IPV4_NONLOCAL_BIND,
 190                 .procname       = "ip_nonlocal_bind",
 191                 .data           = &sysctl_ip_nonlocal_bind,
 192                 .maxlen         = sizeof(int),
 193                 .mode           = 0644,
 194                 .proc_handler   = &proc_dointvec
 195         },
 196         {
 197                 .ctl_name       = NET_IPV4_TCP_SYN_RETRIES,
 198                 .procname       = "tcp_syn_retries",
 199                 .data           = &sysctl_tcp_syn_retries,
 200                 .maxlen         = sizeof(int),
 201                 .mode           = 0644,
 202                 .proc_handler   = &proc_dointvec
 203         },
 204         {
 205                 .ctl_name       = NET_TCP_SYNACK_RETRIES,
 206                 .procname       = "tcp_synack_retries",
 207                 .data           = &sysctl_tcp_synack_retries,
 208                 .maxlen         = sizeof(int),
 209                 .mode           = 0644,
 210                 .proc_handler   = &proc_dointvec
 211         },
 212         {
 213                 .ctl_name       = NET_TCP_MAX_ORPHANS,
 214                 .procname       = "tcp_max_orphans",
 215                 .data           = &sysctl_tcp_max_orphans,
 216                 .maxlen         = sizeof(int),
 217                 .mode           = 0644,
 218                 .proc_handler   = &proc_dointvec
 219         },
 220         {
 221                 .ctl_name       = NET_TCP_MAX_TW_BUCKETS,
 222                 .procname       = "tcp_max_tw_buckets",
 223                 .data           = &sysctl_tcp_max_tw_buckets,
 224                 .maxlen         = sizeof(int),
 225                 .mode           = 0644,
 226                 .proc_handler   = &proc_dointvec
 227         },
 228         {
 229                 .ctl_name       = NET_IPV4_IPFRAG_HIGH_THRESH,
 230                 .procname       = "ipfrag_high_thresh",
 231                 .data           = &sysctl_ipfrag_high_thresh,
 232                 .maxlen         = sizeof(int),
 233                 .mode           = 0644,
 234                 .proc_handler   = &proc_dointvec
 235         },
 236         {
 237                 .ctl_name       = NET_IPV4_IPFRAG_LOW_THRESH,
 238                 .procname       = "ipfrag_low_thresh",
 239                 .data           = &sysctl_ipfrag_low_thresh,
 240                 .maxlen         = sizeof(int),
 241                 .mode           = 0644,
 242                 .proc_handler   = &proc_dointvec
 243         },
 244         {
 245                 .ctl_name       = NET_IPV4_DYNADDR,
 246                 .procname       = "ip_dynaddr",
 247                 .data           = &sysctl_ip_dynaddr,
 248                 .maxlen         = sizeof(int),
 249                 .mode           = 0644,
 250                 .proc_handler   = &proc_dointvec
 251         },
 252         {
 253                 .ctl_name       = NET_IPV4_IPFRAG_TIME,
 254                 .procname       = "ipfrag_time",
 255                 .data           = &sysctl_ipfrag_time,
 256                 .maxlen         = sizeof(int),
 257                 .mode           = 0644,
 258                 .proc_handler   = &proc_dointvec_jiffies,
 259                 .strategy       = &sysctl_jiffies
 260         },
 261         {
 262                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_TIME,
 263                 .procname       = "tcp_keepalive_time",
 264                 .data           = &sysctl_tcp_keepalive_time,
 265                 .maxlen         = sizeof(int),
 266                 .mode           = 0644,
 267                 .proc_handler   = &proc_dointvec_jiffies,
 268                 .strategy       = &sysctl_jiffies
 269         },
 270         {
 271                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_PROBES,
 272                 .procname       = "tcp_keepalive_probes",
 273                 .data           = &sysctl_tcp_keepalive_probes,
 274                 .maxlen         = sizeof(int),
 275                 .mode           = 0644,
 276                 .proc_handler   = &proc_dointvec
 277         },
 278         {
 279                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_INTVL,
 280                 .procname       = "tcp_keepalive_intvl",
 281                 .data           = &sysctl_tcp_keepalive_intvl,
 282                 .maxlen         = sizeof(int),
 283                 .mode           = 0644,
 284                 .proc_handler   = &proc_dointvec_jiffies,
 285                 .strategy       = &sysctl_jiffies
 286         },
 287         {
 288                 .ctl_name       = NET_IPV4_TCP_RETRIES1,
 289                 .procname       = "tcp_retries1",
 290                 .data           = &sysctl_tcp_retries1,
 291                 .maxlen         = sizeof(int),
 292                 .mode           = 0644,
 293                 .proc_handler   = &proc_dointvec_minmax,
 294                 .strategy       = &sysctl_intvec,
 295                 .extra2         = &tcp_retr1_max
 296         },
 297         {
 298                 .ctl_name       = NET_IPV4_TCP_RETRIES2,
 299                 .procname       = "tcp_retries2",
 300                 .data           = &sysctl_tcp_retries2,
 301                 .maxlen         = sizeof(int),
 302                 .mode           = 0644,
 303                 .proc_handler   = &proc_dointvec
 304         },
 305         {
 306                 .ctl_name       = NET_IPV4_TCP_FIN_TIMEOUT,
 307                 .procname       = "tcp_fin_timeout",
 308                 .data           = &sysctl_tcp_fin_timeout,
 309                 .maxlen         = sizeof(int),
 310                 .mode           = 0644,
 311                 .proc_handler   = &proc_dointvec_jiffies,
 312                 .strategy       = &sysctl_jiffies
 313         },
 314 #ifdef CONFIG_SYN_COOKIES
 315         {
 316                 .ctl_name       = NET_TCP_SYNCOOKIES,
 317                 .procname       = "tcp_syncookies",
 318                 .data           = &sysctl_tcp_syncookies,
 319                 .maxlen         = sizeof(int),
 320                 .mode           = 0644,
 321                 .proc_handler   = &proc_dointvec
 322         },
 323 #endif
 324         {
 325                 .ctl_name       = NET_TCP_TW_RECYCLE,
 326                 .procname       = "tcp_tw_recycle",
 327                 .data           = &sysctl_tcp_tw_recycle,
 328                 .maxlen         = sizeof(int),
 329                 .mode           = 0644,
 330                 .proc_handler   = &proc_dointvec
 331         },
 332         {
 333                 .ctl_name       = NET_TCP_ABORT_ON_OVERFLOW,
 334                 .procname       = "tcp_abort_on_overflow",
 335                 .data           = &sysctl_tcp_abort_on_overflow,
 336                 .maxlen         = sizeof(int),
 337                 .mode           = 0644,
 338                 .proc_handler   = &proc_dointvec
 339         },
 340         {
 341                 .ctl_name       = NET_TCP_STDURG,
 342                 .procname       = "tcp_stdurg",
 343                 .data           = &sysctl_tcp_stdurg,
 344                 .maxlen         = sizeof(int),
 345                 .mode           = 0644,
 346                 .proc_handler   = &proc_dointvec
 347         },
 348         {
 349                 .ctl_name       = NET_TCP_RFC1337,
 350                 .procname       = "tcp_rfc1337",
 351                 .data           = &sysctl_tcp_rfc1337,
 352                 .maxlen         = sizeof(int),
 353                 .mode           = 0644,
 354                 .proc_handler   = &proc_dointvec
 355         },
 356         {
 357                 .ctl_name       = NET_TCP_MAX_SYN_BACKLOG,
 358                 .procname       = "tcp_max_syn_backlog",
 359                 .data           = &sysctl_max_syn_backlog,
 360                 .maxlen         = sizeof(int),
 361                 .mode           = 0644,
 362                 .proc_handler   = &proc_dointvec
 363         },
 364         {
 365                 .ctl_name       = NET_IPV4_LOCAL_PORT_RANGE,
 366                 .procname       = "ip_local_port_range",
 367                 .data           = &sysctl_local_port_range,
 368                 .maxlen         = sizeof(sysctl_local_port_range),
 369                 .mode           = 0644,
 370                 .proc_handler   = &proc_dointvec_minmax,
 371                 .strategy       = &sysctl_intvec,
 372                 .extra1         = ip_local_port_range_min,
 373                 .extra2         = ip_local_port_range_max
 374         },
 375         {
 376                 .ctl_name       = NET_IPV4_ICMP_ECHO_IGNORE_ALL,
 377                 .procname       = "icmp_echo_ignore_all",
 378                 .data           = &sysctl_icmp_echo_ignore_all,
 379                 .maxlen         = sizeof(int),
 380                 .mode           = 0644,
 381                 .proc_handler   = &proc_dointvec
 382         },
 383         {
 384                 .ctl_name       = NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,
 385                 .procname       = "icmp_echo_ignore_broadcasts",
 386                 .data           = &sysctl_icmp_echo_ignore_broadcasts,
 387                 .maxlen         = sizeof(int),
 388                 .mode           = 0644,
 389                 .proc_handler   = &proc_dointvec
 390         },
 391         {
 392                 .ctl_name       = NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
 393                 .procname       = "icmp_ignore_bogus_error_responses",
 394                 .data           = &sysctl_icmp_ignore_bogus_error_responses,
 395                 .maxlen         = sizeof(int),
 396                 .mode           = 0644,
 397                 .proc_handler   = &proc_dointvec
 398         },
 399         {
 400                 .ctl_name       = NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
 401                 .procname       = "icmp_errors_use_inbound_ifaddr",
 402                 .data           = &sysctl_icmp_errors_use_inbound_ifaddr,
 403                 .maxlen         = sizeof(int),
 404                 .mode           = 0644,
 405                 .proc_handler   = &proc_dointvec
 406         },
 407         {
 408                 .ctl_name       = NET_IPV4_ROUTE,
 409                 .procname       = "route",
 410                 .maxlen         = 0,
 411                 .mode           = 0555,
 412                 .child          = ipv4_route_table
 413         },
 414 #ifdef CONFIG_IP_MULTICAST
 415         {
 416                 .ctl_name       = NET_IPV4_IGMP_MAX_MEMBERSHIPS,
 417                 .procname       = "igmp_max_memberships",
 418                 .data           = &sysctl_igmp_max_memberships,
 419                 .maxlen         = sizeof(int),
 420                 .mode           = 0644,
 421                 .proc_handler   = &proc_dointvec
 422         },
 423
 424 #endif
 425         {
 426                 .ctl_name       = NET_IPV4_IGMP_MAX_MSF,
 427                 .procname       = "igmp_max_msf",
 428                 .data           = &sysctl_igmp_max_msf,
 429                 .maxlen         = sizeof(int),
 430                 .mode           = 0644,
 431                 .proc_handler   = &proc_dointvec
 432         },
 433         {
 434                 .ctl_name       = NET_IPV4_INET_PEER_THRESHOLD,
 435                 .procname       = "inet_peer_threshold",
 436                 .data           = &inet_peer_threshold,
 437                 .maxlen         = sizeof(int),
 438                 .mode           = 0644,
 439                 .proc_handler   = &proc_dointvec
 440         },
 441         {
 442                 .ctl_name       = NET_IPV4_INET_PEER_MINTTL,
 443                 .procname       = "inet_peer_minttl",
 444                 .data           = &inet_peer_minttl,
 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_MAXTTL,
 452                 .procname       = "inet_peer_maxttl",
 453                 .data           = &inet_peer_maxttl,
 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_MINTIME,
 461                 .procname       = "inet_peer_gc_mintime",
 462                 .data           = &inet_peer_gc_mintime,
 463                 .maxlen         = sizeof(int),
 464                 .mode           = 0644,
 465                 .proc_handler   = &proc_dointvec_jiffies,
 466                 .strategy       = &sysctl_jiffies
 467         },
 468         {
 469                 .ctl_name       = NET_IPV4_INET_PEER_GC_MAXTIME,
 470                 .procname       = "inet_peer_gc_maxtime",
 471                 .data           = &inet_peer_gc_maxtime,
 472                 .maxlen         = sizeof(int),
 473                 .mode           = 0644,
 474                 .proc_handler   = &proc_dointvec_jiffies,
 475                 .strategy       = &sysctl_jiffies
 476         },
 477         {
 478                 .ctl_name       = NET_TCP_ORPHAN_RETRIES,
 479                 .procname       = "tcp_orphan_retries",
 480                 .data           = &sysctl_tcp_orphan_retries,
 481                 .maxlen         = sizeof(int),
 482                 .mode           = 0644,
 483                 .proc_handler   = &proc_dointvec
 484         },
 485         {
 486                 .ctl_name       = NET_TCP_FACK,
 487                 .procname       = "tcp_fack",
 488                 .data           = &sysctl_tcp_fack,
 489                 .maxlen         = sizeof(int),
 490                 .mode           = 0644,
 491                 .proc_handler   = &proc_dointvec
 492         },
 493         {
 494                 .ctl_name       = NET_TCP_REORDERING,
 495                 .procname       = "tcp_reordering",
 496                 .data           = &sysctl_tcp_reordering,
 497                 .maxlen         = sizeof(int),
 498                 .mode           = 0644,
 499                 .proc_handler   = &proc_dointvec
 500         },
 501         {
 502                 .ctl_name       = NET_TCP_ECN,
 503                 .procname       = "tcp_ecn",
 504                 .data           = &sysctl_tcp_ecn,
 505                 .maxlen         = sizeof(int),
 506                 .mode           = 0644,
 507                 .proc_handler   = &proc_dointvec
 508         },
 509         {
 510                 .ctl_name       = NET_TCP_DSACK,
 511                 .procname       = "tcp_dsack",
 512                 .data           = &sysctl_tcp_dsack,
 513                 .maxlen         = sizeof(int),
 514                 .mode           = 0644,
 515                 .proc_handler   = &proc_dointvec
 516         },
 517         {
 518                 .ctl_name       = NET_TCP_MEM,
 519                 .procname       = "tcp_mem",
 520                 .data           = &sysctl_tcp_mem,
 521                 .maxlen         = sizeof(sysctl_tcp_mem),
 522                 .mode           = 0644,
 523                 .proc_handler   = &proc_dointvec
 524         },
 525         {
 526                 .ctl_name       = NET_TCP_WMEM,
 527                 .procname       = "tcp_wmem",
 528                 .data           = &sysctl_tcp_wmem,
 529                 .maxlen         = sizeof(sysctl_tcp_wmem),
 530                 .mode           = 0644,
 531                 .proc_handler   = &proc_dointvec
 532         },
 533         {
 534                 .ctl_name       = NET_TCP_RMEM,
 535                 .procname       = "tcp_rmem",
 536                 .data           = &sysctl_tcp_rmem,
 537                 .maxlen         = sizeof(sysctl_tcp_rmem),
 538                 .mode           = 0644,
 539                 .proc_handler   = &proc_dointvec
 540         },
 541         {
 542                 .ctl_name       = NET_TCP_APP_WIN,
 543                 .procname       = "tcp_app_win",
 544                 .data           = &sysctl_tcp_app_win,
 545                 .maxlen         = sizeof(int),
 546                 .mode           = 0644,
 547                 .proc_handler   = &proc_dointvec
 548         },
 549         {
 550                 .ctl_name       = NET_TCP_ADV_WIN_SCALE,
 551                 .procname       = "tcp_adv_win_scale",
 552                 .data           = &sysctl_tcp_adv_win_scale,
 553                 .maxlen         = sizeof(int),
 554                 .mode           = 0644,
 555                 .proc_handler   = &proc_dointvec
 556         },
 557         {
 558                 .ctl_name       = NET_IPV4_ICMP_RATELIMIT,
 559                 .procname       = "icmp_ratelimit",
 560                 .data           = &sysctl_icmp_ratelimit,
 561                 .maxlen         = sizeof(int),
 562                 .mode           = 0644,
 563                 .proc_handler   = &proc_dointvec
 564         },
 565         {
 566                 .ctl_name       = NET_IPV4_ICMP_RATEMASK,
 567                 .procname       = "icmp_ratemask",
 568                 .data           = &sysctl_icmp_ratemask,
 569                 .maxlen         = sizeof(int),
 570                 .mode           = 0644,
 571                 .proc_handler   = &proc_dointvec
 572         },
 573         {
 574                 .ctl_name       = NET_TCP_TW_REUSE,
 575                 .procname       = "tcp_tw_reuse",
 576                 .data           = &sysctl_tcp_tw_reuse,
 577                 .maxlen         = sizeof(int),
 578                 .mode           = 0644,
 579                 .proc_handler   = &proc_dointvec
 580         },
 581         {
 582                 .ctl_name       = NET_TCP_FRTO,
 583                 .procname       = "tcp_frto",
 584                 .data           = &sysctl_tcp_frto,
 585                 .maxlen         = sizeof(int),
 586                 .mode           = 0644,
 587                 .proc_handler   = &proc_dointvec
 588         },
 589         {
 590                 .ctl_name       = NET_TCP_LOW_LATENCY,
 591                 .procname       = "tcp_low_latency",
 592                 .data           = &sysctl_tcp_low_latency,
 593                 .maxlen         = sizeof(int),
 594                 .mode           = 0644,
 595                 .proc_handler   = &proc_dointvec
 596         },
 597         {
 598                 .ctl_name       = NET_IPV4_IPFRAG_SECRET_INTERVAL,
 599                 .procname       = "ipfrag_secret_interval",
 600                 .data           = &sysctl_ipfrag_secret_interval,
 601                 .maxlen         = sizeof(int),
 602                 .mode           = 0644,
 603                 .proc_handler   = &proc_dointvec_jiffies,
 604                 .strategy       = &sysctl_jiffies
 605         },
 606         {
 607                 .ctl_name       = NET_TCP_NO_METRICS_SAVE,
 608                 .procname       = "tcp_no_metrics_save",
 609                 .data           = &sysctl_tcp_nometrics_save,
 610                 .maxlen         = sizeof(int),
 611                 .mode           = 0644,
 612                 .proc_handler   = &proc_dointvec,
 613         },
 614         {
 615                 .ctl_name       = NET_TCP_WESTWOOD,
 616                 .procname       = "tcp_westwood",
 617                 .data           = &sysctl_tcp_westwood,
 618                 .maxlen         = sizeof(int),
 619                 .mode           = 0644,
 620                 .proc_handler   = &proc_dointvec,
 621         },
 622         {
 623                 .ctl_name       = NET_TCP_VEGAS,
 624                 .procname       = "tcp_vegas_cong_avoid",
 625                 .data           = &sysctl_tcp_vegas_cong_avoid,
 626                 .maxlen         = sizeof(int),
 627                 .mode           = 0644,
 628                 .proc_handler   = &proc_dointvec,
 629         },
 630         {
 631                 .ctl_name       = NET_TCP_VEGAS_ALPHA,
 632                 .procname       = "tcp_vegas_alpha",
 633                 .data           = &sysctl_tcp_vegas_alpha,
 634                 .maxlen         = sizeof(int),
 635                 .mode           = 0644,
 636                 .proc_handler   = &proc_dointvec,
 637         },
 638         {
 639                 .ctl_name       = NET_TCP_VEGAS_BETA,
 640                 .procname       = "tcp_vegas_beta",
 641                 .data           = &sysctl_tcp_vegas_beta,
 642                 .maxlen         = sizeof(int),
 643                 .mode           = 0644,
 644                 .proc_handler   = &proc_dointvec,
 645         },
 646         {
 647                 .ctl_name       = NET_TCP_VEGAS_GAMMA,
 648                 .procname       = "tcp_vegas_gamma",
 649                 .data           = &sysctl_tcp_vegas_gamma,
 650                 .maxlen         = sizeof(int),
 651                 .mode           = 0644,
 652                 .proc_handler   = &proc_dointvec,
 653         },
 654         {
 655                 .ctl_name       = NET_TCP_BIC,
 656                 .procname       = "tcp_bic",
 657                 .data           = &sysctl_tcp_bic,
 658                 .maxlen         = sizeof(int),
 659                 .mode           = 0644,
 660                 .proc_handler   = &proc_dointvec,
 661         },
 662         {
 663                 .ctl_name       = NET_TCP_BIC_FAST_CONVERGENCE,
 664                 .procname       = "tcp_bic_fast_convergence",
 665                 .data           = &sysctl_tcp_bic_fast_convergence,
 666                 .maxlen         = sizeof(int),
 667                 .mode           = 0644,
 668                 .proc_handler   = &proc_dointvec,
 669         },
 670         {
 671                 .ctl_name       = NET_TCP_BIC_LOW_WINDOW,
 672                 .procname       = "tcp_bic_low_window",
 673                 .data           = &sysctl_tcp_bic_low_window,
 674                 .maxlen         = sizeof(int),
 675                 .mode           = 0644,
 676                 .proc_handler   = &proc_dointvec,
 677         },
 678         {
 679                 .ctl_name       = NET_TCP_MODERATE_RCVBUF,
 680                 .procname       = "tcp_moderate_rcvbuf",
 681                 .data           = &sysctl_tcp_moderate_rcvbuf,
 682                 .maxlen         = sizeof(int),
 683                 .mode           = 0644,
 684                 .proc_handler   = &proc_dointvec,
 685         },
 686         {
 687                 .ctl_name       = NET_TCP_TSO_WIN_DIVISOR,
 688                 .procname       = "tcp_tso_win_divisor",
 689                 .data           = &sysctl_tcp_tso_win_divisor,
 690                 .maxlen         = sizeof(int),
 691                 .mode           = 0644,
 692                 .proc_handler   = &proc_dointvec,
 693         },
 694         {
 695                 .ctl_name       = NET_TCP_BIC_BETA,
 696                 .procname       = "tcp_bic_beta",
 697                 .data           = &sysctl_tcp_bic_beta,
 698                 .maxlen         = sizeof(int),
 699                 .mode           = 0644,
 700                 .proc_handler   = &proc_dointvec,
 701         },
 702         { .ctl_name = 0 }
 703 };
 704
 705 #endif /* CONFIG_SYSCTL */
 706
 707 EXPORT_SYMBOL(ipv4_config);