err.no Git - linux-2.6/blob - 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/igmp.h>
  14 #include <linux/inetdevice.h>
  15 #include <linux/seqlock.h>
  16 #include <net/snmp.h>
  17 #include <net/icmp.h>
  18 #include <net/ip.h>
  19 #include <net/route.h>
  20 #include <net/tcp.h>
  21 #include <net/cipso_ipv4.h>
  22 #include <net/inet_frag.h>
  23
  24 static int zero;
  25 static int tcp_retr1_max = 255;
  26 static int ip_local_port_range_min[] = { 1, 1 };
  27 static int ip_local_port_range_max[] = { 65535, 65535 };
  28
  29 static
  30 int ipv4_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
  31                         void __user *buffer, size_t *lenp, loff_t *ppos)
  32 {
  33         int val = IPV4_DEVCONF_ALL(FORWARDING);
  34         int ret;
  35
  36         ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
  37
  38         if (write && IPV4_DEVCONF_ALL(FORWARDING) != val)
  39                 inet_forward_change();
  40
  41         return ret;
  42 }
  43
  44 static int ipv4_sysctl_forward_strategy(ctl_table *table,
  45                          int __user *name, int nlen,
  46                          void __user *oldval, size_t __user *oldlenp,
  47                          void __user *newval, size_t newlen)
  48 {
  49         int *valp = table->data;
  50         int new;
  51
  52         if (!newval || !newlen)
  53                 return 0;
  54
  55         if (newlen != sizeof(int))
  56                 return -EINVAL;
  57
  58         if (get_user(new, (int __user *)newval))
  59                 return -EFAULT;
  60
  61         if (new == *valp)
  62                 return 0;
  63
  64         if (oldval && oldlenp) {
  65                 size_t len;
  66
  67                 if (get_user(len, oldlenp))
  68                         return -EFAULT;
  69
  70                 if (len) {
  71                         if (len > table->maxlen)
  72                                 len = table->maxlen;
  73                         if (copy_to_user(oldval, valp, len))
  74                                 return -EFAULT;
  75                         if (put_user(len, oldlenp))
  76                                 return -EFAULT;
  77                 }
  78         }
  79
  80         *valp = new;
  81         inet_forward_change();
  82         return 1;
  83 }
  84
  85 extern seqlock_t sysctl_port_range_lock;
  86 extern int sysctl_local_port_range[2];
  87
  88 /* Update system visible IP port range */
  89 static void set_local_port_range(int range[2])
  90 {
  91         write_seqlock(&sysctl_port_range_lock);
  92         sysctl_local_port_range[0] = range[0];
  93         sysctl_local_port_range[1] = range[1];
  94         write_sequnlock(&sysctl_port_range_lock);
  95 }
  96
  97 /* Validate changes from /proc interface. */
  98 static int ipv4_local_port_range(ctl_table *table, int write, struct file *filp,
  99                                  void __user *buffer,
 100                                  size_t *lenp, loff_t *ppos)
 101 {
 102         int ret;
 103         int range[2] = { sysctl_local_port_range[0],
 104                          sysctl_local_port_range[1] };
 105         ctl_table tmp = {
 106                 .data = &range,
 107                 .maxlen = sizeof(range),
 108                 .mode = table->mode,
 109                 .extra1 = &ip_local_port_range_min,
 110                 .extra2 = &ip_local_port_range_max,
 111         };
 112
 113         ret = proc_dointvec_minmax(&tmp, write, filp, buffer, lenp, ppos);
 114
 115         if (write && ret == 0) {
 116                 if (range[1] < range[0])
 117                         ret = -EINVAL;
 118                 else
 119                         set_local_port_range(range);
 120         }
 121
 122         return ret;
 123 }
 124
 125 /* Validate changes from sysctl interface. */
 126 static int ipv4_sysctl_local_port_range(ctl_table *table, int __user *name,
 127                                          int nlen, void __user *oldval,
 128                                          size_t __user *oldlenp,
 129                                         void __user *newval, size_t newlen)
 130 {
 131         int ret;
 132         int range[2] = { sysctl_local_port_range[0],
 133                          sysctl_local_port_range[1] };
 134         ctl_table tmp = {
 135                 .data = &range,
 136                 .maxlen = sizeof(range),
 137                 .mode = table->mode,
 138                 .extra1 = &ip_local_port_range_min,
 139                 .extra2 = &ip_local_port_range_max,
 140         };
 141
 142         ret = sysctl_intvec(&tmp, name, nlen, oldval, oldlenp, newval, newlen);
 143         if (ret == 0 && newval && newlen) {
 144                 if (range[1] < range[0])
 145                         ret = -EINVAL;
 146                 else
 147                         set_local_port_range(range);
 148         }
 149         return ret;
 150 }
 151
 152
 153 static int proc_tcp_congestion_control(ctl_table *ctl, int write, struct file * filp,
 154                                        void __user *buffer, size_t *lenp, loff_t *ppos)
 155 {
 156         char val[TCP_CA_NAME_MAX];
 157         ctl_table tbl = {
 158                 .data = val,
 159                 .maxlen = TCP_CA_NAME_MAX,
 160         };
 161         int ret;
 162
 163         tcp_get_default_congestion_control(val);
 164
 165         ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
 166         if (write && ret == 0)
 167                 ret = tcp_set_default_congestion_control(val);
 168         return ret;
 169 }
 170
 171 static int sysctl_tcp_congestion_control(ctl_table *table, int __user *name,
 172                                          int nlen, void __user *oldval,
 173                                          size_t __user *oldlenp,
 174                                          void __user *newval, size_t newlen)
 175 {
 176         char val[TCP_CA_NAME_MAX];
 177         ctl_table tbl = {
 178                 .data = val,
 179                 .maxlen = TCP_CA_NAME_MAX,
 180         };
 181         int ret;
 182
 183         tcp_get_default_congestion_control(val);
 184         ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen);
 185         if (ret == 1 && newval && newlen)
 186                 ret = tcp_set_default_congestion_control(val);
 187         return ret;
 188 }
 189
 190 static int proc_tcp_available_congestion_control(ctl_table *ctl,
 191                                                  int write, struct file * filp,
 192                                                  void __user *buffer, size_t *lenp,
 193                                                  loff_t *ppos)
 194 {
 195         ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
 196         int ret;
 197
 198         tbl.data = kmalloc(tbl.maxlen, GFP_USER);
 199         if (!tbl.data)
 200                 return -ENOMEM;
 201         tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
 202         ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
 203         kfree(tbl.data);
 204         return ret;
 205 }
 206
 207 static int proc_allowed_congestion_control(ctl_table *ctl,
 208                                            int write, struct file * filp,
 209                                            void __user *buffer, size_t *lenp,
 210                                            loff_t *ppos)
 211 {
 212         ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
 213         int ret;
 214
 215         tbl.data = kmalloc(tbl.maxlen, GFP_USER);
 216         if (!tbl.data)
 217                 return -ENOMEM;
 218
 219         tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
 220         ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
 221         if (write && ret == 0)
 222                 ret = tcp_set_allowed_congestion_control(tbl.data);
 223         kfree(tbl.data);
 224         return ret;
 225 }
 226
 227 static int strategy_allowed_congestion_control(ctl_table *table, int __user *name,
 228                                                int nlen, void __user *oldval,
 229                                                size_t __user *oldlenp,
 230                                                void __user *newval,
 231                                                size_t newlen)
 232 {
 233         ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
 234         int ret;
 235
 236         tbl.data = kmalloc(tbl.maxlen, GFP_USER);
 237         if (!tbl.data)
 238                 return -ENOMEM;
 239
 240         tcp_get_available_congestion_control(tbl.data, tbl.maxlen);
 241         ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen);
 242         if (ret == 0 && newval && newlen)
 243                 ret = tcp_set_allowed_congestion_control(tbl.data);
 244         kfree(tbl.data);
 245
 246         return ret;
 247
 248 }
 249
 250 ctl_table ipv4_table[] = {
 251         {
 252                 .ctl_name       = NET_IPV4_TCP_TIMESTAMPS,
 253                 .procname       = "tcp_timestamps",
 254                 .data           = &sysctl_tcp_timestamps,
 255                 .maxlen         = sizeof(int),
 256                 .mode           = 0644,
 257                 .proc_handler   = &proc_dointvec
 258         },
 259         {
 260                 .ctl_name       = NET_IPV4_TCP_WINDOW_SCALING,
 261                 .procname       = "tcp_window_scaling",
 262                 .data           = &sysctl_tcp_window_scaling,
 263                 .maxlen         = sizeof(int),
 264                 .mode           = 0644,
 265                 .proc_handler   = &proc_dointvec
 266         },
 267         {
 268                 .ctl_name       = NET_IPV4_TCP_SACK,
 269                 .procname       = "tcp_sack",
 270                 .data           = &sysctl_tcp_sack,
 271                 .maxlen         = sizeof(int),
 272                 .mode           = 0644,
 273                 .proc_handler   = &proc_dointvec
 274         },
 275         {
 276                 .ctl_name       = NET_IPV4_TCP_RETRANS_COLLAPSE,
 277                 .procname       = "tcp_retrans_collapse",
 278                 .data           = &sysctl_tcp_retrans_collapse,
 279                 .maxlen         = sizeof(int),
 280                 .mode           = 0644,
 281                 .proc_handler   = &proc_dointvec
 282         },
 283         {
 284                 .ctl_name       = NET_IPV4_FORWARD,
 285                 .procname       = "ip_forward",
 286                 .data           = &IPV4_DEVCONF_ALL(FORWARDING),
 287                 .maxlen         = sizeof(int),
 288                 .mode           = 0644,
 289                 .proc_handler   = &ipv4_sysctl_forward,
 290                 .strategy       = &ipv4_sysctl_forward_strategy
 291         },
 292         {
 293                 .ctl_name       = NET_IPV4_DEFAULT_TTL,
 294                 .procname       = "ip_default_ttl",
 295                 .data           = &sysctl_ip_default_ttl,
 296                 .maxlen         = sizeof(int),
 297                 .mode           = 0644,
 298                 .proc_handler   = &ipv4_doint_and_flush,
 299                 .strategy       = &ipv4_doint_and_flush_strategy,
 300         },
 301         {
 302                 .ctl_name       = NET_IPV4_NO_PMTU_DISC,
 303                 .procname       = "ip_no_pmtu_disc",
 304                 .data           = &ipv4_config.no_pmtu_disc,
 305                 .maxlen         = sizeof(int),
 306                 .mode           = 0644,
 307                 .proc_handler   = &proc_dointvec
 308         },
 309         {
 310                 .ctl_name       = NET_IPV4_NONLOCAL_BIND,
 311                 .procname       = "ip_nonlocal_bind",
 312                 .data           = &sysctl_ip_nonlocal_bind,
 313                 .maxlen         = sizeof(int),
 314                 .mode           = 0644,
 315                 .proc_handler   = &proc_dointvec
 316         },
 317         {
 318                 .ctl_name       = NET_IPV4_TCP_SYN_RETRIES,
 319                 .procname       = "tcp_syn_retries",
 320                 .data           = &sysctl_tcp_syn_retries,
 321                 .maxlen         = sizeof(int),
 322                 .mode           = 0644,
 323                 .proc_handler   = &proc_dointvec
 324         },
 325         {
 326                 .ctl_name       = NET_TCP_SYNACK_RETRIES,
 327                 .procname       = "tcp_synack_retries",
 328                 .data           = &sysctl_tcp_synack_retries,
 329                 .maxlen         = sizeof(int),
 330                 .mode           = 0644,
 331                 .proc_handler   = &proc_dointvec
 332         },
 333         {
 334                 .ctl_name       = NET_TCP_MAX_ORPHANS,
 335                 .procname       = "tcp_max_orphans",
 336                 .data           = &sysctl_tcp_max_orphans,
 337                 .maxlen         = sizeof(int),
 338                 .mode           = 0644,
 339                 .proc_handler   = &proc_dointvec
 340         },
 341         {
 342                 .ctl_name       = NET_TCP_MAX_TW_BUCKETS,
 343                 .procname       = "tcp_max_tw_buckets",
 344                 .data           = &tcp_death_row.sysctl_max_tw_buckets,
 345                 .maxlen         = sizeof(int),
 346                 .mode           = 0644,
 347                 .proc_handler   = &proc_dointvec
 348         },
 349         {
 350                 .ctl_name       = NET_IPV4_IPFRAG_HIGH_THRESH,
 351                 .procname       = "ipfrag_high_thresh",
 352                 .data           = &ip4_frags_ctl.high_thresh,
 353                 .maxlen         = sizeof(int),
 354                 .mode           = 0644,
 355                 .proc_handler   = &proc_dointvec
 356         },
 357         {
 358                 .ctl_name       = NET_IPV4_IPFRAG_LOW_THRESH,
 359                 .procname       = "ipfrag_low_thresh",
 360                 .data           = &ip4_frags_ctl.low_thresh,
 361                 .maxlen         = sizeof(int),
 362                 .mode           = 0644,
 363                 .proc_handler   = &proc_dointvec
 364         },
 365         {
 366                 .ctl_name       = NET_IPV4_DYNADDR,
 367                 .procname       = "ip_dynaddr",
 368                 .data           = &sysctl_ip_dynaddr,
 369                 .maxlen         = sizeof(int),
 370                 .mode           = 0644,
 371                 .proc_handler   = &proc_dointvec
 372         },
 373         {
 374                 .ctl_name       = NET_IPV4_IPFRAG_TIME,
 375                 .procname       = "ipfrag_time",
 376                 .data           = &ip4_frags_ctl.timeout,
 377                 .maxlen         = sizeof(int),
 378                 .mode           = 0644,
 379                 .proc_handler   = &proc_dointvec_jiffies,
 380                 .strategy       = &sysctl_jiffies
 381         },
 382         {
 383                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_TIME,
 384                 .procname       = "tcp_keepalive_time",
 385                 .data           = &sysctl_tcp_keepalive_time,
 386                 .maxlen         = sizeof(int),
 387                 .mode           = 0644,
 388                 .proc_handler   = &proc_dointvec_jiffies,
 389                 .strategy       = &sysctl_jiffies
 390         },
 391         {
 392                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_PROBES,
 393                 .procname       = "tcp_keepalive_probes",
 394                 .data           = &sysctl_tcp_keepalive_probes,
 395                 .maxlen         = sizeof(int),
 396                 .mode           = 0644,
 397                 .proc_handler   = &proc_dointvec
 398         },
 399         {
 400                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_INTVL,
 401                 .procname       = "tcp_keepalive_intvl",
 402                 .data           = &sysctl_tcp_keepalive_intvl,
 403                 .maxlen         = sizeof(int),
 404                 .mode           = 0644,
 405                 .proc_handler   = &proc_dointvec_jiffies,
 406                 .strategy       = &sysctl_jiffies
 407         },
 408         {
 409                 .ctl_name       = NET_IPV4_TCP_RETRIES1,
 410                 .procname       = "tcp_retries1",
 411                 .data           = &sysctl_tcp_retries1,
 412                 .maxlen         = sizeof(int),
 413                 .mode           = 0644,
 414                 .proc_handler   = &proc_dointvec_minmax,
 415                 .strategy       = &sysctl_intvec,
 416                 .extra2         = &tcp_retr1_max
 417         },
 418         {
 419                 .ctl_name       = NET_IPV4_TCP_RETRIES2,
 420                 .procname       = "tcp_retries2",
 421                 .data           = &sysctl_tcp_retries2,
 422                 .maxlen         = sizeof(int),
 423                 .mode           = 0644,
 424                 .proc_handler   = &proc_dointvec
 425         },
 426         {
 427                 .ctl_name       = NET_IPV4_TCP_FIN_TIMEOUT,
 428                 .procname       = "tcp_fin_timeout",
 429                 .data           = &sysctl_tcp_fin_timeout,
 430                 .maxlen         = sizeof(int),
 431                 .mode           = 0644,
 432                 .proc_handler   = &proc_dointvec_jiffies,
 433                 .strategy       = &sysctl_jiffies
 434         },
 435 #ifdef CONFIG_SYN_COOKIES
 436         {
 437                 .ctl_name       = NET_TCP_SYNCOOKIES,
 438                 .procname       = "tcp_syncookies",
 439                 .data           = &sysctl_tcp_syncookies,
 440                 .maxlen         = sizeof(int),
 441                 .mode           = 0644,
 442                 .proc_handler   = &proc_dointvec
 443         },
 444 #endif
 445         {
 446                 .ctl_name       = NET_TCP_TW_RECYCLE,
 447                 .procname       = "tcp_tw_recycle",
 448                 .data           = &tcp_death_row.sysctl_tw_recycle,
 449                 .maxlen         = sizeof(int),
 450                 .mode           = 0644,
 451                 .proc_handler   = &proc_dointvec
 452         },
 453         {
 454                 .ctl_name       = NET_TCP_ABORT_ON_OVERFLOW,
 455                 .procname       = "tcp_abort_on_overflow",
 456                 .data           = &sysctl_tcp_abort_on_overflow,
 457                 .maxlen         = sizeof(int),
 458                 .mode           = 0644,
 459                 .proc_handler   = &proc_dointvec
 460         },
 461         {
 462                 .ctl_name       = NET_TCP_STDURG,
 463                 .procname       = "tcp_stdurg",
 464                 .data           = &sysctl_tcp_stdurg,
 465                 .maxlen         = sizeof(int),
 466                 .mode           = 0644,
 467                 .proc_handler   = &proc_dointvec
 468         },
 469         {
 470                 .ctl_name       = NET_TCP_RFC1337,
 471                 .procname       = "tcp_rfc1337",
 472                 .data           = &sysctl_tcp_rfc1337,
 473                 .maxlen         = sizeof(int),
 474                 .mode           = 0644,
 475                 .proc_handler   = &proc_dointvec
 476         },
 477         {
 478                 .ctl_name       = NET_TCP_MAX_SYN_BACKLOG,
 479                 .procname       = "tcp_max_syn_backlog",
 480                 .data           = &sysctl_max_syn_backlog,
 481                 .maxlen         = sizeof(int),
 482                 .mode           = 0644,
 483                 .proc_handler   = &proc_dointvec
 484         },
 485         {
 486                 .ctl_name       = NET_IPV4_LOCAL_PORT_RANGE,
 487                 .procname       = "ip_local_port_range",
 488                 .data           = &sysctl_local_port_range,
 489                 .maxlen         = sizeof(sysctl_local_port_range),
 490                 .mode           = 0644,
 491                 .proc_handler   = &ipv4_local_port_range,
 492                 .strategy       = &ipv4_sysctl_local_port_range,
 493         },
 494         {
 495                 .ctl_name       = NET_IPV4_ICMP_ECHO_IGNORE_ALL,
 496                 .procname       = "icmp_echo_ignore_all",
 497                 .data           = &sysctl_icmp_echo_ignore_all,
 498                 .maxlen         = sizeof(int),
 499                 .mode           = 0644,
 500                 .proc_handler   = &proc_dointvec
 501         },
 502         {
 503                 .ctl_name       = NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,
 504                 .procname       = "icmp_echo_ignore_broadcasts",
 505                 .data           = &sysctl_icmp_echo_ignore_broadcasts,
 506                 .maxlen         = sizeof(int),
 507                 .mode           = 0644,
 508                 .proc_handler   = &proc_dointvec
 509         },
 510         {
 511                 .ctl_name       = NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
 512                 .procname       = "icmp_ignore_bogus_error_responses",
 513                 .data           = &sysctl_icmp_ignore_bogus_error_responses,
 514                 .maxlen         = sizeof(int),
 515                 .mode           = 0644,
 516                 .proc_handler   = &proc_dointvec
 517         },
 518         {
 519                 .ctl_name       = NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
 520                 .procname       = "icmp_errors_use_inbound_ifaddr",
 521                 .data           = &sysctl_icmp_errors_use_inbound_ifaddr,
 522                 .maxlen         = sizeof(int),
 523                 .mode           = 0644,
 524                 .proc_handler   = &proc_dointvec
 525         },
 526         {
 527                 .ctl_name       = NET_IPV4_ROUTE,
 528                 .procname       = "route",
 529                 .maxlen         = 0,
 530                 .mode           = 0555,
 531                 .child          = ipv4_route_table
 532         },
 533 #ifdef CONFIG_IP_MULTICAST
 534         {
 535                 .ctl_name       = NET_IPV4_IGMP_MAX_MEMBERSHIPS,
 536                 .procname       = "igmp_max_memberships",
 537                 .data           = &sysctl_igmp_max_memberships,
 538                 .maxlen         = sizeof(int),
 539                 .mode           = 0644,
 540                 .proc_handler   = &proc_dointvec
 541         },
 542
 543 #endif
 544         {
 545                 .ctl_name       = NET_IPV4_IGMP_MAX_MSF,
 546                 .procname       = "igmp_max_msf",
 547                 .data           = &sysctl_igmp_max_msf,
 548                 .maxlen         = sizeof(int),
 549                 .mode           = 0644,
 550                 .proc_handler   = &proc_dointvec
 551         },
 552         {
 553                 .ctl_name       = NET_IPV4_INET_PEER_THRESHOLD,
 554                 .procname       = "inet_peer_threshold",
 555                 .data           = &inet_peer_threshold,
 556                 .maxlen         = sizeof(int),
 557                 .mode           = 0644,
 558                 .proc_handler   = &proc_dointvec
 559         },
 560         {
 561                 .ctl_name       = NET_IPV4_INET_PEER_MINTTL,
 562                 .procname       = "inet_peer_minttl",
 563                 .data           = &inet_peer_minttl,
 564                 .maxlen         = sizeof(int),
 565                 .mode           = 0644,
 566                 .proc_handler   = &proc_dointvec_jiffies,
 567                 .strategy       = &sysctl_jiffies
 568         },
 569         {
 570                 .ctl_name       = NET_IPV4_INET_PEER_MAXTTL,
 571                 .procname       = "inet_peer_maxttl",
 572                 .data           = &inet_peer_maxttl,
 573                 .maxlen         = sizeof(int),
 574                 .mode           = 0644,
 575                 .proc_handler   = &proc_dointvec_jiffies,
 576                 .strategy       = &sysctl_jiffies
 577         },
 578         {
 579                 .ctl_name       = NET_IPV4_INET_PEER_GC_MINTIME,
 580                 .procname       = "inet_peer_gc_mintime",
 581                 .data           = &inet_peer_gc_mintime,
 582                 .maxlen         = sizeof(int),
 583                 .mode           = 0644,
 584                 .proc_handler   = &proc_dointvec_jiffies,
 585                 .strategy       = &sysctl_jiffies
 586         },
 587         {
 588                 .ctl_name       = NET_IPV4_INET_PEER_GC_MAXTIME,
 589                 .procname       = "inet_peer_gc_maxtime",
 590                 .data           = &inet_peer_gc_maxtime,
 591                 .maxlen         = sizeof(int),
 592                 .mode           = 0644,
 593                 .proc_handler   = &proc_dointvec_jiffies,
 594                 .strategy       = &sysctl_jiffies
 595         },
 596         {
 597                 .ctl_name       = NET_TCP_ORPHAN_RETRIES,
 598                 .procname       = "tcp_orphan_retries",
 599                 .data           = &sysctl_tcp_orphan_retries,
 600                 .maxlen         = sizeof(int),
 601                 .mode           = 0644,
 602                 .proc_handler   = &proc_dointvec
 603         },
 604         {
 605                 .ctl_name       = NET_TCP_FACK,
 606                 .procname       = "tcp_fack",
 607                 .data           = &sysctl_tcp_fack,
 608                 .maxlen         = sizeof(int),
 609                 .mode           = 0644,
 610                 .proc_handler   = &proc_dointvec
 611         },
 612         {
 613                 .ctl_name       = NET_TCP_REORDERING,
 614                 .procname       = "tcp_reordering",
 615                 .data           = &sysctl_tcp_reordering,
 616                 .maxlen         = sizeof(int),
 617                 .mode           = 0644,
 618                 .proc_handler   = &proc_dointvec
 619         },
 620         {
 621                 .ctl_name       = NET_TCP_ECN,
 622                 .procname       = "tcp_ecn",
 623                 .data           = &sysctl_tcp_ecn,
 624                 .maxlen         = sizeof(int),
 625                 .mode           = 0644,
 626                 .proc_handler   = &proc_dointvec
 627         },
 628         {
 629                 .ctl_name       = NET_TCP_DSACK,
 630                 .procname       = "tcp_dsack",
 631                 .data           = &sysctl_tcp_dsack,
 632                 .maxlen         = sizeof(int),
 633                 .mode           = 0644,
 634                 .proc_handler   = &proc_dointvec
 635         },
 636         {
 637                 .ctl_name       = NET_TCP_MEM,
 638                 .procname       = "tcp_mem",
 639                 .data           = &sysctl_tcp_mem,
 640                 .maxlen         = sizeof(sysctl_tcp_mem),
 641                 .mode           = 0644,
 642                 .proc_handler   = &proc_dointvec
 643         },
 644         {
 645                 .ctl_name       = NET_TCP_WMEM,
 646                 .procname       = "tcp_wmem",
 647                 .data           = &sysctl_tcp_wmem,
 648                 .maxlen         = sizeof(sysctl_tcp_wmem),
 649                 .mode           = 0644,
 650                 .proc_handler   = &proc_dointvec
 651         },
 652         {
 653                 .ctl_name       = NET_TCP_RMEM,
 654                 .procname       = "tcp_rmem",
 655                 .data           = &sysctl_tcp_rmem,
 656                 .maxlen         = sizeof(sysctl_tcp_rmem),
 657                 .mode           = 0644,
 658                 .proc_handler   = &proc_dointvec
 659         },
 660         {
 661                 .ctl_name       = NET_TCP_APP_WIN,
 662                 .procname       = "tcp_app_win",
 663                 .data           = &sysctl_tcp_app_win,
 664                 .maxlen         = sizeof(int),
 665                 .mode           = 0644,
 666                 .proc_handler   = &proc_dointvec
 667         },
 668         {
 669                 .ctl_name       = NET_TCP_ADV_WIN_SCALE,
 670                 .procname       = "tcp_adv_win_scale",
 671                 .data           = &sysctl_tcp_adv_win_scale,
 672                 .maxlen         = sizeof(int),
 673                 .mode           = 0644,
 674                 .proc_handler   = &proc_dointvec
 675         },
 676         {
 677                 .ctl_name       = NET_IPV4_ICMP_RATELIMIT,
 678                 .procname       = "icmp_ratelimit",
 679                 .data           = &sysctl_icmp_ratelimit,
 680                 .maxlen         = sizeof(int),
 681                 .mode           = 0644,
 682                 .proc_handler   = &proc_dointvec
 683         },
 684         {
 685                 .ctl_name       = NET_IPV4_ICMP_RATEMASK,
 686                 .procname       = "icmp_ratemask",
 687                 .data           = &sysctl_icmp_ratemask,
 688                 .maxlen         = sizeof(int),
 689                 .mode           = 0644,
 690                 .proc_handler   = &proc_dointvec
 691         },
 692         {
 693                 .ctl_name       = NET_TCP_TW_REUSE,
 694                 .procname       = "tcp_tw_reuse",
 695                 .data           = &sysctl_tcp_tw_reuse,
 696                 .maxlen         = sizeof(int),
 697                 .mode           = 0644,
 698                 .proc_handler   = &proc_dointvec
 699         },
 700         {
 701                 .ctl_name       = NET_TCP_FRTO,
 702                 .procname       = "tcp_frto",
 703                 .data           = &sysctl_tcp_frto,
 704                 .maxlen         = sizeof(int),
 705                 .mode           = 0644,
 706                 .proc_handler   = &proc_dointvec
 707         },
 708         {
 709                 .ctl_name       = NET_TCP_FRTO_RESPONSE,
 710                 .procname       = "tcp_frto_response",
 711                 .data           = &sysctl_tcp_frto_response,
 712                 .maxlen         = sizeof(int),
 713                 .mode           = 0644,
 714                 .proc_handler   = &proc_dointvec
 715         },
 716         {
 717                 .ctl_name       = NET_TCP_LOW_LATENCY,
 718                 .procname       = "tcp_low_latency",
 719                 .data           = &sysctl_tcp_low_latency,
 720                 .maxlen         = sizeof(int),
 721                 .mode           = 0644,
 722                 .proc_handler   = &proc_dointvec
 723         },
 724         {
 725                 .ctl_name       = NET_IPV4_IPFRAG_SECRET_INTERVAL,
 726                 .procname       = "ipfrag_secret_interval",
 727                 .data           = &ip4_frags_ctl.secret_interval,
 728                 .maxlen         = sizeof(int),
 729                 .mode           = 0644,
 730                 .proc_handler   = &proc_dointvec_jiffies,
 731                 .strategy       = &sysctl_jiffies
 732         },
 733         {
 734                 .procname       = "ipfrag_max_dist",
 735                 .data           = &sysctl_ipfrag_max_dist,
 736                 .maxlen         = sizeof(int),
 737                 .mode           = 0644,
 738                 .proc_handler   = &proc_dointvec_minmax,
 739                 .extra1         = &zero
 740         },
 741         {
 742                 .ctl_name       = NET_TCP_NO_METRICS_SAVE,
 743                 .procname       = "tcp_no_metrics_save",
 744                 .data           = &sysctl_tcp_nometrics_save,
 745                 .maxlen         = sizeof(int),
 746                 .mode           = 0644,
 747                 .proc_handler   = &proc_dointvec,
 748         },
 749         {
 750                 .ctl_name       = NET_TCP_MODERATE_RCVBUF,
 751                 .procname       = "tcp_moderate_rcvbuf",
 752                 .data           = &sysctl_tcp_moderate_rcvbuf,
 753                 .maxlen         = sizeof(int),
 754                 .mode           = 0644,
 755                 .proc_handler   = &proc_dointvec,
 756         },
 757         {
 758                 .ctl_name       = NET_TCP_TSO_WIN_DIVISOR,
 759                 .procname       = "tcp_tso_win_divisor",
 760                 .data           = &sysctl_tcp_tso_win_divisor,
 761                 .maxlen         = sizeof(int),
 762                 .mode           = 0644,
 763                 .proc_handler   = &proc_dointvec,
 764         },
 765         {
 766                 .ctl_name       = NET_TCP_CONG_CONTROL,
 767                 .procname       = "tcp_congestion_control",
 768                 .mode           = 0644,
 769                 .maxlen         = TCP_CA_NAME_MAX,
 770                 .proc_handler   = &proc_tcp_congestion_control,
 771                 .strategy       = &sysctl_tcp_congestion_control,
 772         },
 773         {
 774                 .ctl_name       = NET_TCP_ABC,
 775                 .procname       = "tcp_abc",
 776                 .data           = &sysctl_tcp_abc,
 777                 .maxlen         = sizeof(int),
 778                 .mode           = 0644,
 779                 .proc_handler   = &proc_dointvec,
 780         },
 781         {
 782                 .ctl_name       = NET_TCP_MTU_PROBING,
 783                 .procname       = "tcp_mtu_probing",
 784                 .data           = &sysctl_tcp_mtu_probing,
 785                 .maxlen         = sizeof(int),
 786                 .mode           = 0644,
 787                 .proc_handler   = &proc_dointvec,
 788         },
 789         {
 790                 .ctl_name       = NET_TCP_BASE_MSS,
 791                 .procname       = "tcp_base_mss",
 792                 .data           = &sysctl_tcp_base_mss,
 793                 .maxlen         = sizeof(int),
 794                 .mode           = 0644,
 795                 .proc_handler   = &proc_dointvec,
 796         },
 797         {
 798                 .ctl_name       = NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS,
 799                 .procname       = "tcp_workaround_signed_windows",
 800                 .data           = &sysctl_tcp_workaround_signed_windows,
 801                 .maxlen         = sizeof(int),
 802                 .mode           = 0644,
 803                 .proc_handler   = &proc_dointvec
 804         },
 805 #ifdef CONFIG_NET_DMA
 806         {
 807                 .ctl_name       = NET_TCP_DMA_COPYBREAK,
 808                 .procname       = "tcp_dma_copybreak",
 809                 .data           = &sysctl_tcp_dma_copybreak,
 810                 .maxlen         = sizeof(int),
 811                 .mode           = 0644,
 812                 .proc_handler   = &proc_dointvec
 813         },
 814 #endif
 815         {
 816                 .ctl_name       = NET_TCP_SLOW_START_AFTER_IDLE,
 817                 .procname       = "tcp_slow_start_after_idle",
 818                 .data           = &sysctl_tcp_slow_start_after_idle,
 819                 .maxlen         = sizeof(int),
 820                 .mode           = 0644,
 821                 .proc_handler   = &proc_dointvec
 822         },
 823 #ifdef CONFIG_NETLABEL
 824         {
 825                 .ctl_name       = NET_CIPSOV4_CACHE_ENABLE,
 826                 .procname       = "cipso_cache_enable",
 827                 .data           = &cipso_v4_cache_enabled,
 828                 .maxlen         = sizeof(int),
 829                 .mode           = 0644,
 830                 .proc_handler   = &proc_dointvec,
 831         },
 832         {
 833                 .ctl_name       = NET_CIPSOV4_CACHE_BUCKET_SIZE,
 834                 .procname       = "cipso_cache_bucket_size",
 835                 .data           = &cipso_v4_cache_bucketsize,
 836                 .maxlen         = sizeof(int),
 837                 .mode           = 0644,
 838                 .proc_handler   = &proc_dointvec,
 839         },
 840         {
 841                 .ctl_name       = NET_CIPSOV4_RBM_OPTFMT,
 842                 .procname       = "cipso_rbm_optfmt",
 843                 .data           = &cipso_v4_rbm_optfmt,
 844                 .maxlen         = sizeof(int),
 845                 .mode           = 0644,
 846                 .proc_handler   = &proc_dointvec,
 847         },
 848         {
 849                 .ctl_name       = NET_CIPSOV4_RBM_STRICTVALID,
 850                 .procname       = "cipso_rbm_strictvalid",
 851                 .data           = &cipso_v4_rbm_strictvalid,
 852                 .maxlen         = sizeof(int),
 853                 .mode           = 0644,
 854                 .proc_handler   = &proc_dointvec,
 855         },
 856 #endif /* CONFIG_NETLABEL */
 857         {
 858                 .procname       = "tcp_available_congestion_control",
 859                 .maxlen         = TCP_CA_BUF_MAX,
 860                 .mode           = 0444,
 861                 .proc_handler   = &proc_tcp_available_congestion_control,
 862         },
 863         {
 864                 .ctl_name       = NET_TCP_ALLOWED_CONG_CONTROL,
 865                 .procname       = "tcp_allowed_congestion_control",
 866                 .maxlen         = TCP_CA_BUF_MAX,
 867                 .mode           = 0644,
 868                 .proc_handler   = &proc_allowed_congestion_control,
 869                 .strategy       = &strategy_allowed_congestion_control,
 870         },
 871         {
 872                 .ctl_name       = NET_TCP_MAX_SSTHRESH,
 873                 .procname       = "tcp_max_ssthresh",
 874                 .data           = &sysctl_tcp_max_ssthresh,
 875                 .maxlen         = sizeof(int),
 876                 .mode           = 0644,
 877                 .proc_handler   = &proc_dointvec,
 878         },
 879         { .ctl_name = 0 }
 880 };