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