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 static int proc_tcp_congestion_control(ctl_table *ctl, int write, struct file * filp,
 122                                        void __user *buffer, size_t *lenp, loff_t *ppos)
 123 {
 124         char val[TCP_CA_NAME_MAX];
 125         ctl_table tbl = {
 126                 .data = val,
 127                 .maxlen = TCP_CA_NAME_MAX,
 128         };
 129         int ret;
 130
 131         tcp_get_default_congestion_control(val);
 132
 133         ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
 134         if (write && ret == 0)
 135                 ret = tcp_set_default_congestion_control(val);
 136         return ret;
 137 }
 138
 139 int sysctl_tcp_congestion_control(ctl_table *table, int __user *name, int nlen,
 140                                   void __user *oldval, size_t __user *oldlenp,
 141                                   void __user *newval, size_t newlen,
 142                                   void **context)
 143 {
 144         char val[TCP_CA_NAME_MAX];
 145         ctl_table tbl = {
 146                 .data = val,
 147                 .maxlen = TCP_CA_NAME_MAX,
 148         };
 149         int ret;
 150
 151         tcp_get_default_congestion_control(val);
 152         ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen,
 153                             context);
 154         if (ret == 0 && newval && newlen)
 155                 ret = tcp_set_default_congestion_control(val);
 156         return ret;
 157 }
 158
 159
 160 ctl_table ipv4_table[] = {
 161         {
 162                 .ctl_name       = NET_IPV4_TCP_TIMESTAMPS,
 163                 .procname       = "tcp_timestamps",
 164                 .data           = &sysctl_tcp_timestamps,
 165                 .maxlen         = sizeof(int),
 166                 .mode           = 0644,
 167                 .proc_handler   = &proc_dointvec
 168         },
 169         {
 170                 .ctl_name       = NET_IPV4_TCP_WINDOW_SCALING,
 171                 .procname       = "tcp_window_scaling",
 172                 .data           = &sysctl_tcp_window_scaling,
 173                 .maxlen         = sizeof(int),
 174                 .mode           = 0644,
 175                 .proc_handler   = &proc_dointvec
 176         },
 177         {
 178                 .ctl_name       = NET_IPV4_TCP_SACK,
 179                 .procname       = "tcp_sack",
 180                 .data           = &sysctl_tcp_sack,
 181                 .maxlen         = sizeof(int),
 182                 .mode           = 0644,
 183                 .proc_handler   = &proc_dointvec
 184         },
 185         {
 186                 .ctl_name       = NET_IPV4_TCP_RETRANS_COLLAPSE,
 187                 .procname       = "tcp_retrans_collapse",
 188                 .data           = &sysctl_tcp_retrans_collapse,
 189                 .maxlen         = sizeof(int),
 190                 .mode           = 0644,
 191                 .proc_handler   = &proc_dointvec
 192         },
 193         {
 194                 .ctl_name       = NET_IPV4_FORWARD,
 195                 .procname       = "ip_forward",
 196                 .data           = &ipv4_devconf.forwarding,
 197                 .maxlen         = sizeof(int),
 198                 .mode           = 0644,
 199                 .proc_handler   = &ipv4_sysctl_forward,
 200                 .strategy       = &ipv4_sysctl_forward_strategy
 201         },
 202         {
 203                 .ctl_name       = NET_IPV4_DEFAULT_TTL,
 204                 .procname       = "ip_default_ttl",
 205                 .data           = &sysctl_ip_default_ttl,
 206                 .maxlen         = sizeof(int),
 207                 .mode           = 0644,
 208                 .proc_handler   = &ipv4_doint_and_flush,
 209                 .strategy       = &ipv4_doint_and_flush_strategy,
 210         },
 211         {
 212                 .ctl_name       = NET_IPV4_AUTOCONFIG,
 213                 .procname       = "ip_autoconfig",
 214                 .data           = &ipv4_config.autoconfig,
 215                 .maxlen         = sizeof(int),
 216                 .mode           = 0644,
 217                 .proc_handler   = &proc_dointvec
 218         },
 219         {
 220                 .ctl_name       = NET_IPV4_NO_PMTU_DISC,
 221                 .procname       = "ip_no_pmtu_disc",
 222                 .data           = &ipv4_config.no_pmtu_disc,
 223                 .maxlen         = sizeof(int),
 224                 .mode           = 0644,
 225                 .proc_handler   = &proc_dointvec
 226         },
 227         {
 228                 .ctl_name       = NET_IPV4_NONLOCAL_BIND,
 229                 .procname       = "ip_nonlocal_bind",
 230                 .data           = &sysctl_ip_nonlocal_bind,
 231                 .maxlen         = sizeof(int),
 232                 .mode           = 0644,
 233                 .proc_handler   = &proc_dointvec
 234         },
 235         {
 236                 .ctl_name       = NET_IPV4_TCP_SYN_RETRIES,
 237                 .procname       = "tcp_syn_retries",
 238                 .data           = &sysctl_tcp_syn_retries,
 239                 .maxlen         = sizeof(int),
 240                 .mode           = 0644,
 241                 .proc_handler   = &proc_dointvec
 242         },
 243         {
 244                 .ctl_name       = NET_TCP_SYNACK_RETRIES,
 245                 .procname       = "tcp_synack_retries",
 246                 .data           = &sysctl_tcp_synack_retries,
 247                 .maxlen         = sizeof(int),
 248                 .mode           = 0644,
 249                 .proc_handler   = &proc_dointvec
 250         },
 251         {
 252                 .ctl_name       = NET_TCP_MAX_ORPHANS,
 253                 .procname       = "tcp_max_orphans",
 254                 .data           = &sysctl_tcp_max_orphans,
 255                 .maxlen         = sizeof(int),
 256                 .mode           = 0644,
 257                 .proc_handler   = &proc_dointvec
 258         },
 259         {
 260                 .ctl_name       = NET_TCP_MAX_TW_BUCKETS,
 261                 .procname       = "tcp_max_tw_buckets",
 262                 .data           = &sysctl_tcp_max_tw_buckets,
 263                 .maxlen         = sizeof(int),
 264                 .mode           = 0644,
 265                 .proc_handler   = &proc_dointvec
 266         },
 267         {
 268                 .ctl_name       = NET_IPV4_IPFRAG_HIGH_THRESH,
 269                 .procname       = "ipfrag_high_thresh",
 270                 .data           = &sysctl_ipfrag_high_thresh,
 271                 .maxlen         = sizeof(int),
 272                 .mode           = 0644,
 273                 .proc_handler   = &proc_dointvec
 274         },
 275         {
 276                 .ctl_name       = NET_IPV4_IPFRAG_LOW_THRESH,
 277                 .procname       = "ipfrag_low_thresh",
 278                 .data           = &sysctl_ipfrag_low_thresh,
 279                 .maxlen         = sizeof(int),
 280                 .mode           = 0644,
 281                 .proc_handler   = &proc_dointvec
 282         },
 283         {
 284                 .ctl_name       = NET_IPV4_DYNADDR,
 285                 .procname       = "ip_dynaddr",
 286                 .data           = &sysctl_ip_dynaddr,
 287                 .maxlen         = sizeof(int),
 288                 .mode           = 0644,
 289                 .proc_handler   = &proc_dointvec
 290         },
 291         {
 292                 .ctl_name       = NET_IPV4_IPFRAG_TIME,
 293                 .procname       = "ipfrag_time",
 294                 .data           = &sysctl_ipfrag_time,
 295                 .maxlen         = sizeof(int),
 296                 .mode           = 0644,
 297                 .proc_handler   = &proc_dointvec_jiffies,
 298                 .strategy       = &sysctl_jiffies
 299         },
 300         {
 301                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_TIME,
 302                 .procname       = "tcp_keepalive_time",
 303                 .data           = &sysctl_tcp_keepalive_time,
 304                 .maxlen         = sizeof(int),
 305                 .mode           = 0644,
 306                 .proc_handler   = &proc_dointvec_jiffies,
 307                 .strategy       = &sysctl_jiffies
 308         },
 309         {
 310                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_PROBES,
 311                 .procname       = "tcp_keepalive_probes",
 312                 .data           = &sysctl_tcp_keepalive_probes,
 313                 .maxlen         = sizeof(int),
 314                 .mode           = 0644,
 315                 .proc_handler   = &proc_dointvec
 316         },
 317         {
 318                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_INTVL,
 319                 .procname       = "tcp_keepalive_intvl",
 320                 .data           = &sysctl_tcp_keepalive_intvl,
 321                 .maxlen         = sizeof(int),
 322                 .mode           = 0644,
 323                 .proc_handler   = &proc_dointvec_jiffies,
 324                 .strategy       = &sysctl_jiffies
 325         },
 326         {
 327                 .ctl_name       = NET_IPV4_TCP_RETRIES1,
 328                 .procname       = "tcp_retries1",
 329                 .data           = &sysctl_tcp_retries1,
 330                 .maxlen         = sizeof(int),
 331                 .mode           = 0644,
 332                 .proc_handler   = &proc_dointvec_minmax,
 333                 .strategy       = &sysctl_intvec,
 334                 .extra2         = &tcp_retr1_max
 335         },
 336         {
 337                 .ctl_name       = NET_IPV4_TCP_RETRIES2,
 338                 .procname       = "tcp_retries2",
 339                 .data           = &sysctl_tcp_retries2,
 340                 .maxlen         = sizeof(int),
 341                 .mode           = 0644,
 342                 .proc_handler   = &proc_dointvec
 343         },
 344         {
 345                 .ctl_name       = NET_IPV4_TCP_FIN_TIMEOUT,
 346                 .procname       = "tcp_fin_timeout",
 347                 .data           = &sysctl_tcp_fin_timeout,
 348                 .maxlen         = sizeof(int),
 349                 .mode           = 0644,
 350                 .proc_handler   = &proc_dointvec_jiffies,
 351                 .strategy       = &sysctl_jiffies
 352         },
 353 #ifdef CONFIG_SYN_COOKIES
 354         {
 355                 .ctl_name       = NET_TCP_SYNCOOKIES,
 356                 .procname       = "tcp_syncookies",
 357                 .data           = &sysctl_tcp_syncookies,
 358                 .maxlen         = sizeof(int),
 359                 .mode           = 0644,
 360                 .proc_handler   = &proc_dointvec
 361         },
 362 #endif
 363         {
 364                 .ctl_name       = NET_TCP_TW_RECYCLE,
 365                 .procname       = "tcp_tw_recycle",
 366                 .data           = &sysctl_tcp_tw_recycle,
 367                 .maxlen         = sizeof(int),
 368                 .mode           = 0644,
 369                 .proc_handler   = &proc_dointvec
 370         },
 371         {
 372                 .ctl_name       = NET_TCP_ABORT_ON_OVERFLOW,
 373                 .procname       = "tcp_abort_on_overflow",
 374                 .data           = &sysctl_tcp_abort_on_overflow,
 375                 .maxlen         = sizeof(int),
 376                 .mode           = 0644,
 377                 .proc_handler   = &proc_dointvec
 378         },
 379         {
 380                 .ctl_name       = NET_TCP_STDURG,
 381                 .procname       = "tcp_stdurg",
 382                 .data           = &sysctl_tcp_stdurg,
 383                 .maxlen         = sizeof(int),
 384                 .mode           = 0644,
 385                 .proc_handler   = &proc_dointvec
 386         },
 387         {
 388                 .ctl_name       = NET_TCP_RFC1337,
 389                 .procname       = "tcp_rfc1337",
 390                 .data           = &sysctl_tcp_rfc1337,
 391                 .maxlen         = sizeof(int),
 392                 .mode           = 0644,
 393                 .proc_handler   = &proc_dointvec
 394         },
 395         {
 396                 .ctl_name       = NET_TCP_MAX_SYN_BACKLOG,
 397                 .procname       = "tcp_max_syn_backlog",
 398                 .data           = &sysctl_max_syn_backlog,
 399                 .maxlen         = sizeof(int),
 400                 .mode           = 0644,
 401                 .proc_handler   = &proc_dointvec
 402         },
 403         {
 404                 .ctl_name       = NET_IPV4_LOCAL_PORT_RANGE,
 405                 .procname       = "ip_local_port_range",
 406                 .data           = &sysctl_local_port_range,
 407                 .maxlen         = sizeof(sysctl_local_port_range),
 408                 .mode           = 0644,
 409                 .proc_handler   = &proc_dointvec_minmax,
 410                 .strategy       = &sysctl_intvec,
 411                 .extra1         = ip_local_port_range_min,
 412                 .extra2         = ip_local_port_range_max
 413         },
 414         {
 415                 .ctl_name       = NET_IPV4_ICMP_ECHO_IGNORE_ALL,
 416                 .procname       = "icmp_echo_ignore_all",
 417                 .data           = &sysctl_icmp_echo_ignore_all,
 418                 .maxlen         = sizeof(int),
 419                 .mode           = 0644,
 420                 .proc_handler   = &proc_dointvec
 421         },
 422         {
 423                 .ctl_name       = NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,
 424                 .procname       = "icmp_echo_ignore_broadcasts",
 425                 .data           = &sysctl_icmp_echo_ignore_broadcasts,
 426                 .maxlen         = sizeof(int),
 427                 .mode           = 0644,
 428                 .proc_handler   = &proc_dointvec
 429         },
 430         {
 431                 .ctl_name       = NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
 432                 .procname       = "icmp_ignore_bogus_error_responses",
 433                 .data           = &sysctl_icmp_ignore_bogus_error_responses,
 434                 .maxlen         = sizeof(int),
 435                 .mode           = 0644,
 436                 .proc_handler   = &proc_dointvec
 437         },
 438         {
 439                 .ctl_name       = NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
 440                 .procname       = "icmp_errors_use_inbound_ifaddr",
 441                 .data           = &sysctl_icmp_errors_use_inbound_ifaddr,
 442                 .maxlen         = sizeof(int),
 443                 .mode           = 0644,
 444                 .proc_handler   = &proc_dointvec
 445         },
 446         {
 447                 .ctl_name       = NET_IPV4_ROUTE,
 448                 .procname       = "route",
 449                 .maxlen         = 0,
 450                 .mode           = 0555,
 451                 .child          = ipv4_route_table
 452         },
 453 #ifdef CONFIG_IP_MULTICAST
 454         {
 455                 .ctl_name       = NET_IPV4_IGMP_MAX_MEMBERSHIPS,
 456                 .procname       = "igmp_max_memberships",
 457                 .data           = &sysctl_igmp_max_memberships,
 458                 .maxlen         = sizeof(int),
 459                 .mode           = 0644,
 460                 .proc_handler   = &proc_dointvec
 461         },
 462
 463 #endif
 464         {
 465                 .ctl_name       = NET_IPV4_IGMP_MAX_MSF,
 466                 .procname       = "igmp_max_msf",
 467                 .data           = &sysctl_igmp_max_msf,
 468                 .maxlen         = sizeof(int),
 469                 .mode           = 0644,
 470                 .proc_handler   = &proc_dointvec
 471         },
 472         {
 473                 .ctl_name       = NET_IPV4_INET_PEER_THRESHOLD,
 474                 .procname       = "inet_peer_threshold",
 475                 .data           = &inet_peer_threshold,
 476                 .maxlen         = sizeof(int),
 477                 .mode           = 0644,
 478                 .proc_handler   = &proc_dointvec
 479         },
 480         {
 481                 .ctl_name       = NET_IPV4_INET_PEER_MINTTL,
 482                 .procname       = "inet_peer_minttl",
 483                 .data           = &inet_peer_minttl,
 484                 .maxlen         = sizeof(int),
 485                 .mode           = 0644,
 486                 .proc_handler   = &proc_dointvec_jiffies,
 487                 .strategy       = &sysctl_jiffies
 488         },
 489         {
 490                 .ctl_name       = NET_IPV4_INET_PEER_MAXTTL,
 491                 .procname       = "inet_peer_maxttl",
 492                 .data           = &inet_peer_maxttl,
 493                 .maxlen         = sizeof(int),
 494                 .mode           = 0644,
 495                 .proc_handler   = &proc_dointvec_jiffies,
 496                 .strategy       = &sysctl_jiffies
 497         },
 498         {
 499                 .ctl_name       = NET_IPV4_INET_PEER_GC_MINTIME,
 500                 .procname       = "inet_peer_gc_mintime",
 501                 .data           = &inet_peer_gc_mintime,
 502                 .maxlen         = sizeof(int),
 503                 .mode           = 0644,
 504                 .proc_handler   = &proc_dointvec_jiffies,
 505                 .strategy       = &sysctl_jiffies
 506         },
 507         {
 508                 .ctl_name       = NET_IPV4_INET_PEER_GC_MAXTIME,
 509                 .procname       = "inet_peer_gc_maxtime",
 510                 .data           = &inet_peer_gc_maxtime,
 511                 .maxlen         = sizeof(int),
 512                 .mode           = 0644,
 513                 .proc_handler   = &proc_dointvec_jiffies,
 514                 .strategy       = &sysctl_jiffies
 515         },
 516         {
 517                 .ctl_name       = NET_TCP_ORPHAN_RETRIES,
 518                 .procname       = "tcp_orphan_retries",
 519                 .data           = &sysctl_tcp_orphan_retries,
 520                 .maxlen         = sizeof(int),
 521                 .mode           = 0644,
 522                 .proc_handler   = &proc_dointvec
 523         },
 524         {
 525                 .ctl_name       = NET_TCP_FACK,
 526                 .procname       = "tcp_fack",
 527                 .data           = &sysctl_tcp_fack,
 528                 .maxlen         = sizeof(int),
 529                 .mode           = 0644,
 530                 .proc_handler   = &proc_dointvec
 531         },
 532         {
 533                 .ctl_name       = NET_TCP_REORDERING,
 534                 .procname       = "tcp_reordering",
 535                 .data           = &sysctl_tcp_reordering,
 536                 .maxlen         = sizeof(int),
 537                 .mode           = 0644,
 538                 .proc_handler   = &proc_dointvec
 539         },
 540         {
 541                 .ctl_name       = NET_TCP_ECN,
 542                 .procname       = "tcp_ecn",
 543                 .data           = &sysctl_tcp_ecn,
 544                 .maxlen         = sizeof(int),
 545                 .mode           = 0644,
 546                 .proc_handler   = &proc_dointvec
 547         },
 548         {
 549                 .ctl_name       = NET_TCP_DSACK,
 550                 .procname       = "tcp_dsack",
 551                 .data           = &sysctl_tcp_dsack,
 552                 .maxlen         = sizeof(int),
 553                 .mode           = 0644,
 554                 .proc_handler   = &proc_dointvec
 555         },
 556         {
 557                 .ctl_name       = NET_TCP_MEM,
 558                 .procname       = "tcp_mem",
 559                 .data           = &sysctl_tcp_mem,
 560                 .maxlen         = sizeof(sysctl_tcp_mem),
 561                 .mode           = 0644,
 562                 .proc_handler   = &proc_dointvec
 563         },
 564         {
 565                 .ctl_name       = NET_TCP_WMEM,
 566                 .procname       = "tcp_wmem",
 567                 .data           = &sysctl_tcp_wmem,
 568                 .maxlen         = sizeof(sysctl_tcp_wmem),
 569                 .mode           = 0644,
 570                 .proc_handler   = &proc_dointvec
 571         },
 572         {
 573                 .ctl_name       = NET_TCP_RMEM,
 574                 .procname       = "tcp_rmem",
 575                 .data           = &sysctl_tcp_rmem,
 576                 .maxlen         = sizeof(sysctl_tcp_rmem),
 577                 .mode           = 0644,
 578                 .proc_handler   = &proc_dointvec
 579         },
 580         {
 581                 .ctl_name       = NET_TCP_APP_WIN,
 582                 .procname       = "tcp_app_win",
 583                 .data           = &sysctl_tcp_app_win,
 584                 .maxlen         = sizeof(int),
 585                 .mode           = 0644,
 586                 .proc_handler   = &proc_dointvec
 587         },
 588         {
 589                 .ctl_name       = NET_TCP_ADV_WIN_SCALE,
 590                 .procname       = "tcp_adv_win_scale",
 591                 .data           = &sysctl_tcp_adv_win_scale,
 592                 .maxlen         = sizeof(int),
 593                 .mode           = 0644,
 594                 .proc_handler   = &proc_dointvec
 595         },
 596         {
 597                 .ctl_name       = NET_IPV4_ICMP_RATELIMIT,
 598                 .procname       = "icmp_ratelimit",
 599                 .data           = &sysctl_icmp_ratelimit,
 600                 .maxlen         = sizeof(int),
 601                 .mode           = 0644,
 602                 .proc_handler   = &proc_dointvec
 603         },
 604         {
 605                 .ctl_name       = NET_IPV4_ICMP_RATEMASK,
 606                 .procname       = "icmp_ratemask",
 607                 .data           = &sysctl_icmp_ratemask,
 608                 .maxlen         = sizeof(int),
 609                 .mode           = 0644,
 610                 .proc_handler   = &proc_dointvec
 611         },
 612         {
 613                 .ctl_name       = NET_TCP_TW_REUSE,
 614                 .procname       = "tcp_tw_reuse",
 615                 .data           = &sysctl_tcp_tw_reuse,
 616                 .maxlen         = sizeof(int),
 617                 .mode           = 0644,
 618                 .proc_handler   = &proc_dointvec
 619         },
 620         {
 621                 .ctl_name       = NET_TCP_FRTO,
 622                 .procname       = "tcp_frto",
 623                 .data           = &sysctl_tcp_frto,
 624                 .maxlen         = sizeof(int),
 625                 .mode           = 0644,
 626                 .proc_handler   = &proc_dointvec
 627         },
 628         {
 629                 .ctl_name       = NET_TCP_LOW_LATENCY,
 630                 .procname       = "tcp_low_latency",
 631                 .data           = &sysctl_tcp_low_latency,
 632                 .maxlen         = sizeof(int),
 633                 .mode           = 0644,
 634                 .proc_handler   = &proc_dointvec
 635         },
 636         {
 637                 .ctl_name       = NET_IPV4_IPFRAG_SECRET_INTERVAL,
 638                 .procname       = "ipfrag_secret_interval",
 639                 .data           = &sysctl_ipfrag_secret_interval,
 640                 .maxlen         = sizeof(int),
 641                 .mode           = 0644,
 642                 .proc_handler   = &proc_dointvec_jiffies,
 643                 .strategy       = &sysctl_jiffies
 644         },
 645         {
 646                 .ctl_name       = NET_TCP_NO_METRICS_SAVE,
 647                 .procname       = "tcp_no_metrics_save",
 648                 .data           = &sysctl_tcp_nometrics_save,
 649                 .maxlen         = sizeof(int),
 650                 .mode           = 0644,
 651                 .proc_handler   = &proc_dointvec,
 652         },
 653         {
 654                 .ctl_name       = NET_TCP_MODERATE_RCVBUF,
 655                 .procname       = "tcp_moderate_rcvbuf",
 656                 .data           = &sysctl_tcp_moderate_rcvbuf,
 657                 .maxlen         = sizeof(int),
 658                 .mode           = 0644,
 659                 .proc_handler   = &proc_dointvec,
 660         },
 661         {
 662                 .ctl_name       = NET_TCP_TSO_WIN_DIVISOR,
 663                 .procname       = "tcp_tso_win_divisor",
 664                 .data           = &sysctl_tcp_tso_win_divisor,
 665                 .maxlen         = sizeof(int),
 666                 .mode           = 0644,
 667                 .proc_handler   = &proc_dointvec,
 668         },
 669         {
 670                 .ctl_name       = NET_TCP_CONG_CONTROL,
 671                 .procname       = "tcp_congestion_control",
 672                 .mode           = 0644,
 673                 .maxlen         = TCP_CA_NAME_MAX,
 674                 .proc_handler   = &proc_tcp_congestion_control,
 675                 .strategy       = &sysctl_tcp_congestion_control,
 676         },
 677
 678         { .ctl_name = 0 }
 679 };
 680
 681 #endif /* CONFIG_SYSCTL */
 682
 683 EXPORT_SYMBOL(ipv4_config);