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 #ifdef CONFIG_ICMP_IPOD
  27 extern int sysctl_icmp_ipod_version;
  28 extern int sysctl_icmp_ipod_enabled;
  29 extern u32 sysctl_icmp_ipod_host;
  30 extern u32 sysctl_icmp_ipod_mask;
  31 extern char sysctl_icmp_ipod_key[32+1];
  32 #endif
  33
  34 /* From ip_fragment.c */
  35 extern int sysctl_ipfrag_low_thresh;
  36 extern int sysctl_ipfrag_high_thresh;
  37 extern int sysctl_ipfrag_time;
  38 extern int sysctl_ipfrag_secret_interval;
  39
  40 /* From ip_output.c */
  41 extern int sysctl_ip_dynaddr;
  42
  43 /* From icmp.c */
  44 extern int sysctl_icmp_ratelimit;
  45 extern int sysctl_icmp_ratemask;
  46
  47 /* From igmp.c */
  48 extern int sysctl_igmp_max_memberships;
  49 extern int sysctl_igmp_max_msf;
  50
  51 /* From inetpeer.c */
  52 extern int inet_peer_threshold;
  53 extern int inet_peer_minttl;
  54 extern int inet_peer_maxttl;
  55 extern int inet_peer_gc_mintime;
  56 extern int inet_peer_gc_maxtime;
  57
  58 #ifdef CONFIG_SYSCTL
  59 static int tcp_retr1_max = 255;
  60 static int ip_local_port_range_min[] = { 1, 1 };
  61 static int ip_local_port_range_max[] = { 65535, 65535 };
  62 #endif
  63
  64 struct ipv4_config ipv4_config;
  65
  66 extern ctl_table ipv4_route_table[];
  67
  68 #ifdef CONFIG_SYSCTL
  69
  70 static
  71 int ipv4_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
  72                         void __user *buffer, size_t *lenp, loff_t *ppos)
  73 {
  74         int val = ipv4_devconf.forwarding;
  75         int ret;
  76
  77         ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
  78
  79         if (write && ipv4_devconf.forwarding != val)
  80                 inet_forward_change();
  81
  82         return ret;
  83 }
  84
  85 static int ipv4_sysctl_forward_strategy(ctl_table *table,
  86                          int __user *name, int nlen,
  87                          void __user *oldval, size_t __user *oldlenp,
  88                          void __user *newval, size_t newlen,
  89                          void **context)
  90 {
  91         int *valp = table->data;
  92         int new;
  93
  94         if (!newval || !newlen)
  95                 return 0;
  96
  97         if (newlen != sizeof(int))
  98                 return -EINVAL;
  99
 100         if (get_user(new, (int __user *)newval))
 101                 return -EFAULT;
 102
 103         if (new == *valp)
 104                 return 0;
 105
 106         if (oldval && oldlenp) {
 107                 size_t len;
 108
 109                 if (get_user(len, oldlenp))
 110                         return -EFAULT;
 111
 112                 if (len) {
 113                         if (len > table->maxlen)
 114                                 len = table->maxlen;
 115                         if (copy_to_user(oldval, valp, len))
 116                                 return -EFAULT;
 117                         if (put_user(len, oldlenp))
 118                                 return -EFAULT;
 119                 }
 120         }
 121
 122         *valp = new;
 123         inet_forward_change();
 124         return 1;
 125 }
 126
 127 ctl_table ipv4_table[] = {
 128         {
 129                 .ctl_name       = NET_IPV4_TCP_TIMESTAMPS,
 130                 .procname       = "tcp_timestamps",
 131                 .data           = &sysctl_tcp_timestamps,
 132                 .maxlen         = sizeof(int),
 133                 .mode           = 0644,
 134                 .proc_handler   = &proc_dointvec
 135         },
 136         {
 137                 .ctl_name       = NET_IPV4_TCP_WINDOW_SCALING,
 138                 .procname       = "tcp_window_scaling",
 139                 .data           = &sysctl_tcp_window_scaling,
 140                 .maxlen         = sizeof(int),
 141                 .mode           = 0644,
 142                 .proc_handler   = &proc_dointvec
 143         },
 144         {
 145                 .ctl_name       = NET_IPV4_TCP_SACK,
 146                 .procname       = "tcp_sack",
 147                 .data           = &sysctl_tcp_sack,
 148                 .maxlen         = sizeof(int),
 149                 .mode           = 0644,
 150                 .proc_handler   = &proc_dointvec
 151         },
 152         {
 153                 .ctl_name       = NET_IPV4_TCP_RETRANS_COLLAPSE,
 154                 .procname       = "tcp_retrans_collapse",
 155                 .data           = &sysctl_tcp_retrans_collapse,
 156                 .maxlen         = sizeof(int),
 157                 .mode           = 0644,
 158                 .proc_handler   = &proc_dointvec
 159         },
 160         {
 161                 .ctl_name       = NET_IPV4_FORWARD,
 162                 .procname       = "ip_forward",
 163                 .data           = &ipv4_devconf.forwarding,
 164                 .maxlen         = sizeof(int),
 165                 .mode           = 0644,
 166                 .proc_handler   = &ipv4_sysctl_forward,
 167                 .strategy       = &ipv4_sysctl_forward_strategy
 168         },
 169         {
 170                 .ctl_name       = NET_IPV4_DEFAULT_TTL,
 171                 .procname       = "ip_default_ttl",
 172                 .data           = &sysctl_ip_default_ttl,
 173                 .maxlen         = sizeof(int),
 174                 .mode           = 0644,
 175                 .proc_handler   = &ipv4_doint_and_flush,
 176                 .strategy       = &ipv4_doint_and_flush_strategy,
 177         },
 178         {
 179                 .ctl_name       = NET_IPV4_AUTOCONFIG,
 180                 .procname       = "ip_autoconfig",
 181                 .data           = &ipv4_config.autoconfig,
 182                 .maxlen         = sizeof(int),
 183                 .mode           = 0644,
 184                 .proc_handler   = &proc_dointvec
 185         },
 186         {
 187                 .ctl_name       = NET_IPV4_NO_PMTU_DISC,
 188                 .procname       = "ip_no_pmtu_disc",
 189                 .data           = &ipv4_config.no_pmtu_disc,
 190                 .maxlen         = sizeof(int),
 191                 .mode           = 0644,
 192                 .proc_handler   = &proc_dointvec
 193         },
 194         {
 195                 .ctl_name       = NET_IPV4_NONLOCAL_BIND,
 196                 .procname       = "ip_nonlocal_bind",
 197                 .data           = &sysctl_ip_nonlocal_bind,
 198                 .maxlen         = sizeof(int),
 199                 .mode           = 0644,
 200                 .proc_handler   = &proc_dointvec
 201         },
 202         {
 203                 .ctl_name       = NET_IPV4_TCP_SYN_RETRIES,
 204                 .procname       = "tcp_syn_retries",
 205                 .data           = &sysctl_tcp_syn_retries,
 206                 .maxlen         = sizeof(int),
 207                 .mode           = 0644,
 208                 .proc_handler   = &proc_dointvec
 209         },
 210         {
 211                 .ctl_name       = NET_TCP_SYNACK_RETRIES,
 212                 .procname       = "tcp_synack_retries",
 213                 .data           = &sysctl_tcp_synack_retries,
 214                 .maxlen         = sizeof(int),
 215                 .mode           = 0644,
 216                 .proc_handler   = &proc_dointvec
 217         },
 218         {
 219                 .ctl_name       = NET_TCP_MAX_ORPHANS,
 220                 .procname       = "tcp_max_orphans",
 221                 .data           = &sysctl_tcp_max_orphans,
 222                 .maxlen         = sizeof(int),
 223                 .mode           = 0644,
 224                 .proc_handler   = &proc_dointvec
 225         },
 226         {
 227                 .ctl_name       = NET_TCP_MAX_TW_BUCKETS,
 228                 .procname       = "tcp_max_tw_buckets",
 229                 .data           = &sysctl_tcp_max_tw_buckets,
 230                 .maxlen         = sizeof(int),
 231                 .mode           = 0644,
 232                 .proc_handler   = &proc_dointvec
 233         },
 234         {
 235                 .ctl_name       = NET_IPV4_IPFRAG_HIGH_THRESH,
 236                 .procname       = "ipfrag_high_thresh",
 237                 .data           = &sysctl_ipfrag_high_thresh,
 238                 .maxlen         = sizeof(int),
 239                 .mode           = 0644,
 240                 .proc_handler   = &proc_dointvec
 241         },
 242         {
 243                 .ctl_name       = NET_IPV4_IPFRAG_LOW_THRESH,
 244                 .procname       = "ipfrag_low_thresh",
 245                 .data           = &sysctl_ipfrag_low_thresh,
 246                 .maxlen         = sizeof(int),
 247                 .mode           = 0644,
 248                 .proc_handler   = &proc_dointvec
 249         },
 250         {
 251                 .ctl_name       = NET_IPV4_DYNADDR,
 252                 .procname       = "ip_dynaddr",
 253                 .data           = &sysctl_ip_dynaddr,
 254                 .maxlen         = sizeof(int),
 255                 .mode           = 0644,
 256                 .proc_handler   = &proc_dointvec
 257         },
 258         {
 259                 .ctl_name       = NET_IPV4_IPFRAG_TIME,
 260                 .procname       = "ipfrag_time",
 261                 .data           = &sysctl_ipfrag_time,
 262                 .maxlen         = sizeof(int),
 263                 .mode           = 0644,
 264                 .proc_handler   = &proc_dointvec_jiffies,
 265                 .strategy       = &sysctl_jiffies
 266         },
 267         {
 268                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_TIME,
 269                 .procname       = "tcp_keepalive_time",
 270                 .data           = &sysctl_tcp_keepalive_time,
 271                 .maxlen         = sizeof(int),
 272                 .mode           = 0644,
 273                 .proc_handler   = &proc_dointvec_jiffies,
 274                 .strategy       = &sysctl_jiffies
 275         },
 276         {
 277                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_PROBES,
 278                 .procname       = "tcp_keepalive_probes",
 279                 .data           = &sysctl_tcp_keepalive_probes,
 280                 .maxlen         = sizeof(int),
 281                 .mode           = 0644,
 282                 .proc_handler   = &proc_dointvec
 283         },
 284         {
 285                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_INTVL,
 286                 .procname       = "tcp_keepalive_intvl",
 287                 .data           = &sysctl_tcp_keepalive_intvl,
 288                 .maxlen         = sizeof(int),
 289                 .mode           = 0644,
 290                 .proc_handler   = &proc_dointvec_jiffies,
 291                 .strategy       = &sysctl_jiffies
 292         },
 293         {
 294                 .ctl_name       = NET_IPV4_TCP_RETRIES1,
 295                 .procname       = "tcp_retries1",
 296                 .data           = &sysctl_tcp_retries1,
 297                 .maxlen         = sizeof(int),
 298                 .mode           = 0644,
 299                 .proc_handler   = &proc_dointvec_minmax,
 300                 .strategy       = &sysctl_intvec,
 301                 .extra2         = &tcp_retr1_max
 302         },
 303         {
 304                 .ctl_name       = NET_IPV4_TCP_RETRIES2,
 305                 .procname       = "tcp_retries2",
 306                 .data           = &sysctl_tcp_retries2,
 307                 .maxlen         = sizeof(int),
 308                 .mode           = 0644,
 309                 .proc_handler   = &proc_dointvec
 310         },
 311         {
 312                 .ctl_name       = NET_IPV4_TCP_FIN_TIMEOUT,
 313                 .procname       = "tcp_fin_timeout",
 314                 .data           = &sysctl_tcp_fin_timeout,
 315                 .maxlen         = sizeof(int),
 316                 .mode           = 0644,
 317                 .proc_handler   = &proc_dointvec_jiffies,
 318                 .strategy       = &sysctl_jiffies
 319         },
 320 #ifdef CONFIG_SYN_COOKIES
 321         {
 322                 .ctl_name       = NET_TCP_SYNCOOKIES,
 323                 .procname       = "tcp_syncookies",
 324                 .data           = &sysctl_tcp_syncookies,
 325                 .maxlen         = sizeof(int),
 326                 .mode           = 0644,
 327                 .proc_handler   = &proc_dointvec
 328         },
 329 #endif
 330         {
 331                 .ctl_name       = NET_TCP_TW_RECYCLE,
 332                 .procname       = "tcp_tw_recycle",
 333                 .data           = &sysctl_tcp_tw_recycle,
 334                 .maxlen         = sizeof(int),
 335                 .mode           = 0644,
 336                 .proc_handler   = &proc_dointvec
 337         },
 338         {
 339                 .ctl_name       = NET_TCP_ABORT_ON_OVERFLOW,
 340                 .procname       = "tcp_abort_on_overflow",
 341                 .data           = &sysctl_tcp_abort_on_overflow,
 342                 .maxlen         = sizeof(int),
 343                 .mode           = 0644,
 344                 .proc_handler   = &proc_dointvec
 345         },
 346         {
 347                 .ctl_name       = NET_TCP_STDURG,
 348                 .procname       = "tcp_stdurg",
 349                 .data           = &sysctl_tcp_stdurg,
 350                 .maxlen         = sizeof(int),
 351                 .mode           = 0644,
 352                 .proc_handler   = &proc_dointvec
 353         },
 354         {
 355                 .ctl_name       = NET_TCP_RFC1337,
 356                 .procname       = "tcp_rfc1337",
 357                 .data           = &sysctl_tcp_rfc1337,
 358                 .maxlen         = sizeof(int),
 359                 .mode           = 0644,
 360                 .proc_handler   = &proc_dointvec
 361         },
 362         {
 363                 .ctl_name       = NET_TCP_MAX_SYN_BACKLOG,
 364                 .procname       = "tcp_max_syn_backlog",
 365                 .data           = &sysctl_max_syn_backlog,
 366                 .maxlen         = sizeof(int),
 367                 .mode           = 0644,
 368                 .proc_handler   = &proc_dointvec
 369         },
 370         {
 371                 .ctl_name       = NET_IPV4_LOCAL_PORT_RANGE,
 372                 .procname       = "ip_local_port_range",
 373                 .data           = &sysctl_local_port_range,
 374                 .maxlen         = sizeof(sysctl_local_port_range),
 375                 .mode           = 0644,
 376                 .proc_handler   = &proc_dointvec_minmax,
 377                 .strategy       = &sysctl_intvec,
 378                 .extra1         = ip_local_port_range_min,
 379                 .extra2         = ip_local_port_range_max
 380         },
 381         {
 382                 .ctl_name       = NET_IPV4_ICMP_ECHO_IGNORE_ALL,
 383                 .procname       = "icmp_echo_ignore_all",
 384                 .data           = &sysctl_icmp_echo_ignore_all,
 385                 .maxlen         = sizeof(int),
 386                 .mode           = 0644,
 387                 .proc_handler   = &proc_dointvec
 388         },
 389         {
 390                 .ctl_name       = NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,
 391                 .procname       = "icmp_echo_ignore_broadcasts",
 392                 .data           = &sysctl_icmp_echo_ignore_broadcasts,
 393                 .maxlen         = sizeof(int),
 394                 .mode           = 0644,
 395                 .proc_handler   = &proc_dointvec
 396         },
 397         {
 398                 .ctl_name       = NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
 399                 .procname       = "icmp_ignore_bogus_error_responses",
 400                 .data           = &sysctl_icmp_ignore_bogus_error_responses,
 401                 .maxlen         = sizeof(int),
 402                 .mode           = 0644,
 403                 .proc_handler   = &proc_dointvec
 404         },
 405 #ifdef CONFIG_ICMP_IPOD
 406         {
 407                 .ctl_name       = NET_IPV4_ICMP_IPOD_VERSION,
 408                 .procname       = "icmp_ipod_version",
 409                 .data           = &sysctl_icmp_ipod_version,
 410                 .maxlen         = sizeof(sysctl_icmp_ipod_version),
 411                 .mode           = 0444,
 412                 .proc_handler   = &proc_dointvec
 413         },
 414         {
 415                 .ctl_name       = NET_IPV4_ICMP_IPOD_ENABLED,
 416                 .procname       = "icmp_ipod_enabled",
 417                 .data           = &sysctl_icmp_ipod_enabled,
 418                 .maxlen         = sizeof(sysctl_icmp_ipod_enabled),
 419                 .mode           = 0644,
 420                 .proc_handler   = &proc_dointvec
 421         },
 422         {
 423                 .ctl_name       = NET_IPV4_ICMP_IPOD_HOST,
 424                 .procname       = "icmp_ipod_host",
 425                 .data           = &sysctl_icmp_ipod_host,
 426                 .maxlen         = sizeof(sysctl_icmp_ipod_host),
 427                 .mode           = 0644,
 428                 .proc_handler   = &proc_dointvec
 429         },
 430         {
 431                 .ctl_name       = NET_IPV4_ICMP_IPOD_MASK,
 432                 .procname       = "icmp_ipod_mask",
 433                 .data           = &sysctl_icmp_ipod_mask,
 434                 .maxlen         = sizeof(sysctl_icmp_ipod_mask),
 435                 .mode           = 0644,
 436                 .proc_handler   = &proc_dointvec
 437         },
 438         {
 439                 .ctl_name       = NET_IPV4_ICMP_IPOD_KEY,
 440                 .procname       = "icmp_ipod_key",
 441                 .data           = &sysctl_icmp_ipod_key,
 442                 .maxlen         = sizeof(sysctl_icmp_ipod_key),
 443                 .mode           = 0600,
 444                 .proc_handler   = &proc_dostring,
 445                 .strategy       = &sysctl_string
 446         },
 447 #endif
 448         {
 449                 .ctl_name       = NET_IPV4_ROUTE,
 450                 .procname       = "route",
 451                 .maxlen         = 0,
 452                 .mode           = 0555,
 453                 .child          = ipv4_route_table
 454         },
 455 #ifdef CONFIG_IP_MULTICAST
 456         {
 457                 .ctl_name       = NET_IPV4_IGMP_MAX_MEMBERSHIPS,
 458                 .procname       = "igmp_max_memberships",
 459                 .data           = &sysctl_igmp_max_memberships,
 460                 .maxlen         = sizeof(int),
 461                 .mode           = 0644,
 462                 .proc_handler   = &proc_dointvec
 463         },
 464
 465 #endif
 466         {
 467                 .ctl_name       = NET_IPV4_IGMP_MAX_MSF,
 468                 .procname       = "igmp_max_msf",
 469                 .data           = &sysctl_igmp_max_msf,
 470                 .maxlen         = sizeof(int),
 471                 .mode           = 0644,
 472                 .proc_handler   = &proc_dointvec
 473         },
 474         {
 475                 .ctl_name       = NET_IPV4_INET_PEER_THRESHOLD,
 476                 .procname       = "inet_peer_threshold",
 477                 .data           = &inet_peer_threshold,
 478                 .maxlen         = sizeof(int),
 479                 .mode           = 0644,
 480                 .proc_handler   = &proc_dointvec
 481         },
 482         {
 483                 .ctl_name       = NET_IPV4_INET_PEER_MINTTL,
 484                 .procname       = "inet_peer_minttl",
 485                 .data           = &inet_peer_minttl,
 486                 .maxlen         = sizeof(int),
 487                 .mode           = 0644,
 488                 .proc_handler   = &proc_dointvec_jiffies,
 489                 .strategy       = &sysctl_jiffies
 490         },
 491         {
 492                 .ctl_name       = NET_IPV4_INET_PEER_MAXTTL,
 493                 .procname       = "inet_peer_maxttl",
 494                 .data           = &inet_peer_maxttl,
 495                 .maxlen         = sizeof(int),
 496                 .mode           = 0644,
 497                 .proc_handler   = &proc_dointvec_jiffies,
 498                 .strategy       = &sysctl_jiffies
 499         },
 500         {
 501                 .ctl_name       = NET_IPV4_INET_PEER_GC_MINTIME,
 502                 .procname       = "inet_peer_gc_mintime",
 503                 .data           = &inet_peer_gc_mintime,
 504                 .maxlen         = sizeof(int),
 505                 .mode           = 0644,
 506                 .proc_handler   = &proc_dointvec_jiffies,
 507                 .strategy       = &sysctl_jiffies
 508         },
 509         {
 510                 .ctl_name       = NET_IPV4_INET_PEER_GC_MAXTIME,
 511                 .procname       = "inet_peer_gc_maxtime",
 512                 .data           = &inet_peer_gc_maxtime,
 513                 .maxlen         = sizeof(int),
 514                 .mode           = 0644,
 515                 .proc_handler   = &proc_dointvec_jiffies,
 516                 .strategy       = &sysctl_jiffies
 517         },
 518         {
 519                 .ctl_name       = NET_TCP_ORPHAN_RETRIES,
 520                 .procname       = "tcp_orphan_retries",
 521                 .data           = &sysctl_tcp_orphan_retries,
 522                 .maxlen         = sizeof(int),
 523                 .mode           = 0644,
 524                 .proc_handler   = &proc_dointvec
 525         },
 526         {
 527                 .ctl_name       = NET_TCP_FACK,
 528                 .procname       = "tcp_fack",
 529                 .data           = &sysctl_tcp_fack,
 530                 .maxlen         = sizeof(int),
 531                 .mode           = 0644,
 532                 .proc_handler   = &proc_dointvec
 533         },
 534         {
 535                 .ctl_name       = NET_TCP_REORDERING,
 536                 .procname       = "tcp_reordering",
 537                 .data           = &sysctl_tcp_reordering,
 538                 .maxlen         = sizeof(int),
 539                 .mode           = 0644,
 540                 .proc_handler   = &proc_dointvec
 541         },
 542         {
 543                 .ctl_name       = NET_TCP_ECN,
 544                 .procname       = "tcp_ecn",
 545                 .data           = &sysctl_tcp_ecn,
 546                 .maxlen         = sizeof(int),
 547                 .mode           = 0644,
 548                 .proc_handler   = &proc_dointvec
 549         },
 550         {
 551                 .ctl_name       = NET_TCP_DSACK,
 552                 .procname       = "tcp_dsack",
 553                 .data           = &sysctl_tcp_dsack,
 554                 .maxlen         = sizeof(int),
 555                 .mode           = 0644,
 556                 .proc_handler   = &proc_dointvec
 557         },
 558         {
 559                 .ctl_name       = NET_TCP_MEM,
 560                 .procname       = "tcp_mem",
 561                 .data           = &sysctl_tcp_mem,
 562                 .maxlen         = sizeof(sysctl_tcp_mem),
 563                 .mode           = 0644,
 564                 .proc_handler   = &proc_dointvec
 565         },
 566         {
 567                 .ctl_name       = NET_TCP_WMEM,
 568                 .procname       = "tcp_wmem",
 569                 .data           = &sysctl_tcp_wmem,
 570                 .maxlen         = sizeof(sysctl_tcp_wmem),
 571                 .mode           = 0644,
 572                 .proc_handler   = &proc_dointvec
 573         },
 574         {
 575                 .ctl_name       = NET_TCP_RMEM,
 576                 .procname       = "tcp_rmem",
 577                 .data           = &sysctl_tcp_rmem,
 578                 .maxlen         = sizeof(sysctl_tcp_rmem),
 579                 .mode           = 0644,
 580                 .proc_handler   = &proc_dointvec
 581         },
 582         {
 583                 .ctl_name       = NET_TCP_APP_WIN,
 584                 .procname       = "tcp_app_win",
 585                 .data           = &sysctl_tcp_app_win,
 586                 .maxlen         = sizeof(int),
 587                 .mode           = 0644,
 588                 .proc_handler   = &proc_dointvec
 589         },
 590         {
 591                 .ctl_name       = NET_TCP_ADV_WIN_SCALE,
 592                 .procname       = "tcp_adv_win_scale",
 593                 .data           = &sysctl_tcp_adv_win_scale,
 594                 .maxlen         = sizeof(int),
 595                 .mode           = 0644,
 596                 .proc_handler   = &proc_dointvec
 597         },
 598         {
 599                 .ctl_name       = NET_IPV4_ICMP_RATELIMIT,
 600                 .procname       = "icmp_ratelimit",
 601                 .data           = &sysctl_icmp_ratelimit,
 602                 .maxlen         = sizeof(int),
 603                 .mode           = 0644,
 604                 .proc_handler   = &proc_dointvec
 605         },
 606         {
 607                 .ctl_name       = NET_IPV4_ICMP_RATEMASK,
 608                 .procname       = "icmp_ratemask",
 609                 .data           = &sysctl_icmp_ratemask,
 610                 .maxlen         = sizeof(int),
 611                 .mode           = 0644,
 612                 .proc_handler   = &proc_dointvec
 613         },
 614         {
 615                 .ctl_name       = NET_TCP_TW_REUSE,
 616                 .procname       = "tcp_tw_reuse",
 617                 .data           = &sysctl_tcp_tw_reuse,
 618                 .maxlen         = sizeof(int),
 619                 .mode           = 0644,
 620                 .proc_handler   = &proc_dointvec
 621         },
 622         {
 623                 .ctl_name       = NET_TCP_FRTO,
 624                 .procname       = "tcp_frto",
 625                 .data           = &sysctl_tcp_frto,
 626                 .maxlen         = sizeof(int),
 627                 .mode           = 0644,
 628                 .proc_handler   = &proc_dointvec
 629         },
 630         {
 631                 .ctl_name       = NET_TCP_LOW_LATENCY,
 632                 .procname       = "tcp_low_latency",
 633                 .data           = &sysctl_tcp_low_latency,
 634                 .maxlen         = sizeof(int),
 635                 .mode           = 0644,
 636                 .proc_handler   = &proc_dointvec
 637         },
 638         {
 639                 .ctl_name       = NET_IPV4_IPFRAG_SECRET_INTERVAL,
 640                 .procname       = "ipfrag_secret_interval",
 641                 .data           = &sysctl_ipfrag_secret_interval,
 642                 .maxlen         = sizeof(int),
 643                 .mode           = 0644,
 644                 .proc_handler   = &proc_dointvec_jiffies,
 645                 .strategy       = &sysctl_jiffies
 646         },
 647         {
 648                 .ctl_name       = NET_TCP_NO_METRICS_SAVE,
 649                 .procname       = "tcp_no_metrics_save",
 650                 .data           = &sysctl_tcp_nometrics_save,
 651                 .maxlen         = sizeof(int),
 652                 .mode           = 0644,
 653                 .proc_handler   = &proc_dointvec,
 654         },
 655         {
 656                 .ctl_name       = NET_TCP_WESTWOOD,
 657                 .procname       = "tcp_westwood",
 658                 .data           = &sysctl_tcp_westwood,
 659                 .maxlen         = sizeof(int),
 660                 .mode           = 0644,
 661                 .proc_handler   = &proc_dointvec,
 662         },
 663         {
 664                 .ctl_name       = NET_TCP_VEGAS,
 665                 .procname       = "tcp_vegas_cong_avoid",
 666                 .data           = &sysctl_tcp_vegas_cong_avoid,
 667                 .maxlen         = sizeof(int),
 668                 .mode           = 0644,
 669                 .proc_handler   = &proc_dointvec,
 670         },
 671         {
 672                 .ctl_name       = NET_TCP_VEGAS_ALPHA,
 673                 .procname       = "tcp_vegas_alpha",
 674                 .data           = &sysctl_tcp_vegas_alpha,
 675                 .maxlen         = sizeof(int),
 676                 .mode           = 0644,
 677                 .proc_handler   = &proc_dointvec,
 678         },
 679         {
 680                 .ctl_name       = NET_TCP_VEGAS_BETA,
 681                 .procname       = "tcp_vegas_beta",
 682                 .data           = &sysctl_tcp_vegas_beta,
 683                 .maxlen         = sizeof(int),
 684                 .mode           = 0644,
 685                 .proc_handler   = &proc_dointvec,
 686         },
 687         {
 688                 .ctl_name       = NET_TCP_VEGAS_GAMMA,
 689                 .procname       = "tcp_vegas_gamma",
 690                 .data           = &sysctl_tcp_vegas_gamma,
 691                 .maxlen         = sizeof(int),
 692                 .mode           = 0644,
 693                 .proc_handler   = &proc_dointvec,
 694         },
 695         {
 696                 .ctl_name       = NET_TCP_BIC,
 697                 .procname       = "tcp_bic",
 698                 .data           = &sysctl_tcp_bic,
 699                 .maxlen         = sizeof(int),
 700                 .mode           = 0644,
 701                 .proc_handler   = &proc_dointvec,
 702         },
 703         {
 704                 .ctl_name       = NET_TCP_BIC_FAST_CONVERGENCE,
 705                 .procname       = "tcp_bic_fast_convergence",
 706                 .data           = &sysctl_tcp_bic_fast_convergence,
 707                 .maxlen         = sizeof(int),
 708                 .mode           = 0644,
 709                 .proc_handler   = &proc_dointvec,
 710         },
 711         {
 712                 .ctl_name       = NET_TCP_BIC_LOW_WINDOW,
 713                 .procname       = "tcp_bic_low_window",
 714                 .data           = &sysctl_tcp_bic_low_window,
 715                 .maxlen         = sizeof(int),
 716                 .mode           = 0644,
 717                 .proc_handler   = &proc_dointvec,
 718         },
 719         {
 720                 .ctl_name       = NET_TCP_DEFAULT_WIN_SCALE,
 721                 .procname       = "tcp_default_win_scale",
 722                 .data           = &sysctl_tcp_default_win_scale,
 723                 .maxlen         = sizeof(int),
 724                 .mode           = 0644,
 725                 .proc_handler   = &proc_dointvec,
 726         },
 727         {
 728                 .ctl_name       = NET_TCP_MODERATE_RCVBUF,
 729                 .procname       = "tcp_moderate_rcvbuf",
 730                 .data           = &sysctl_tcp_moderate_rcvbuf,
 731                 .maxlen         = sizeof(int),
 732                 .mode           = 0644,
 733                 .proc_handler   = &proc_dointvec,
 734         },
 735         { .ctl_name = 0 }
 736 };
 737
 738 #endif /* CONFIG_SYSCTL */
 739
 740 EXPORT_SYMBOL(ipv4_config);