1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem. 4 * 5 * Begun April 1, 1996, Mike Shaver. 6 * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS] 7 */ 8 9 #include <linux/sysctl.h> 10 #include <linux/seqlock.h> 11 #include <linux/init.h> 12 #include <linux/slab.h> 13 #include <net/icmp.h> 14 #include <net/ip.h> 15 #include <net/ip_fib.h> 16 #include <net/tcp.h> 17 #include <net/udp.h> 18 #include <net/cipso_ipv4.h> 19 #include <net/ping.h> 20 #include <net/protocol.h> 21 #include <net/netevent.h> 22 23 static int tcp_retr1_max = 255; 24 static int ip_local_port_range_min[] = { 1, 1 }; 25 static int ip_local_port_range_max[] = { 65535, 65535 }; 26 static int tcp_adv_win_scale_min = -31; 27 static int tcp_adv_win_scale_max = 31; 28 static int tcp_app_win_max = 31; 29 static int tcp_min_snd_mss_min = TCP_MIN_SND_MSS; 30 static int tcp_min_snd_mss_max = 65535; 31 static int ip_privileged_port_min; 32 static int ip_privileged_port_max = 65535; 33 static int ip_ttl_min = 1; 34 static int ip_ttl_max = 255; 35 static int tcp_syn_retries_min = 1; 36 static int tcp_syn_retries_max = MAX_TCP_SYNCNT; 37 static int tcp_syn_linear_timeouts_max = MAX_TCP_SYNCNT; 38 static unsigned long ip_ping_group_range_min[] = { 0, 0 }; 39 static unsigned long ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; 40 static u32 u32_max_div_HZ = UINT_MAX / HZ; 41 static int one_day_secs = 24 * 3600; 42 static u32 fib_multipath_hash_fields_all_mask __maybe_unused = 43 FIB_MULTIPATH_HASH_FIELD_ALL_MASK; 44 static unsigned int tcp_child_ehash_entries_max = 16 * 1024 * 1024; 45 static unsigned int udp_child_hash_entries_max = UDP_HTABLE_SIZE_MAX; 46 static int tcp_plb_max_rounds = 31; 47 static int tcp_plb_max_cong_thresh = 256; 48 49 /* obsolete */ 50 static int sysctl_tcp_low_latency __read_mostly; 51 52 /* Update system visible IP port range */ 53 static void set_local_port_range(struct net *net, unsigned int low, unsigned int high) 54 { 55 bool same_parity = !((low ^ high) & 1); 56 57 if (same_parity && !net->ipv4.ip_local_ports.warned) { 58 net->ipv4.ip_local_ports.warned = true; 59 pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n"); 60 } 61 WRITE_ONCE(net->ipv4.ip_local_ports.range, high << 16 | low); 62 } 63 64 /* Validate changes from /proc interface. */ 65 static int ipv4_local_port_range(struct ctl_table *table, int write, 66 void *buffer, size_t *lenp, loff_t *ppos) 67 { 68 struct net *net = table->data; 69 int ret; 70 int range[2]; 71 struct ctl_table tmp = { 72 .data = &range, 73 .maxlen = sizeof(range), 74 .mode = table->mode, 75 .extra1 = &ip_local_port_range_min, 76 .extra2 = &ip_local_port_range_max, 77 }; 78 79 inet_get_local_port_range(net, &range[0], &range[1]); 80 81 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); 82 83 if (write && ret == 0) { 84 /* Ensure that the upper limit is not smaller than the lower, 85 * and that the lower does not encroach upon the privileged 86 * port limit. 87 */ 88 if ((range[1] < range[0]) || 89 (range[0] < READ_ONCE(net->ipv4.sysctl_ip_prot_sock))) 90 ret = -EINVAL; 91 else 92 set_local_port_range(net, range[0], range[1]); 93 } 94 95 return ret; 96 } 97 98 /* Validate changes from /proc interface. */ 99 static int ipv4_privileged_ports(struct ctl_table *table, int write, 100 void *buffer, size_t *lenp, loff_t *ppos) 101 { 102 struct net *net = container_of(table->data, struct net, 103 ipv4.sysctl_ip_prot_sock); 104 int ret; 105 int pports; 106 int range[2]; 107 struct ctl_table tmp = { 108 .data = &pports, 109 .maxlen = sizeof(pports), 110 .mode = table->mode, 111 .extra1 = &ip_privileged_port_min, 112 .extra2 = &ip_privileged_port_max, 113 }; 114 115 pports = READ_ONCE(net->ipv4.sysctl_ip_prot_sock); 116 117 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); 118 119 if (write && ret == 0) { 120 inet_get_local_port_range(net, &range[0], &range[1]); 121 /* Ensure that the local port range doesn't overlap with the 122 * privileged port range. 123 */ 124 if (range[0] < pports) 125 ret = -EINVAL; 126 else 127 WRITE_ONCE(net->ipv4.sysctl_ip_prot_sock, pports); 128 } 129 130 return ret; 131 } 132 133 static void inet_get_ping_group_range_table(const struct ctl_table *table, 134 kgid_t *low, kgid_t *high) 135 { 136 kgid_t *data = table->data; 137 struct net *net = 138 container_of(table->data, struct net, ipv4.ping_group_range.range); 139 unsigned int seq; 140 do { 141 seq = read_seqbegin(&net->ipv4.ping_group_range.lock); 142 143 *low = data[0]; 144 *high = data[1]; 145 } while (read_seqretry(&net->ipv4.ping_group_range.lock, seq)); 146 } 147 148 /* Update system visible IP port range */ 149 static void set_ping_group_range(const struct ctl_table *table, 150 kgid_t low, kgid_t high) 151 { 152 kgid_t *data = table->data; 153 struct net *net = 154 container_of(table->data, struct net, ipv4.ping_group_range.range); 155 write_seqlock(&net->ipv4.ping_group_range.lock); 156 data[0] = low; 157 data[1] = high; 158 write_sequnlock(&net->ipv4.ping_group_range.lock); 159 } 160 161 /* Validate changes from /proc interface. */ 162 static int ipv4_ping_group_range(struct ctl_table *table, int write, 163 void *buffer, size_t *lenp, loff_t *ppos) 164 { 165 struct user_namespace *user_ns = current_user_ns(); 166 int ret; 167 unsigned long urange[2]; 168 kgid_t low, high; 169 struct ctl_table tmp = { 170 .data = &urange, 171 .maxlen = sizeof(urange), 172 .mode = table->mode, 173 .extra1 = &ip_ping_group_range_min, 174 .extra2 = &ip_ping_group_range_max, 175 }; 176 177 inet_get_ping_group_range_table(table, &low, &high); 178 urange[0] = from_kgid_munged(user_ns, low); 179 urange[1] = from_kgid_munged(user_ns, high); 180 ret = proc_doulongvec_minmax(&tmp, write, buffer, lenp, ppos); 181 182 if (write && ret == 0) { 183 low = make_kgid(user_ns, urange[0]); 184 high = make_kgid(user_ns, urange[1]); 185 if (!gid_valid(low) || !gid_valid(high)) 186 return -EINVAL; 187 if (urange[1] < urange[0] || gid_lt(high, low)) { 188 low = make_kgid(&init_user_ns, 1); 189 high = make_kgid(&init_user_ns, 0); 190 } 191 set_ping_group_range(table, low, high); 192 } 193 194 return ret; 195 } 196 197 static int ipv4_fwd_update_priority(struct ctl_table *table, int write, 198 void *buffer, size_t *lenp, loff_t *ppos) 199 { 200 struct net *net; 201 int ret; 202 203 net = container_of(table->data, struct net, 204 ipv4.sysctl_ip_fwd_update_priority); 205 ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos); 206 if (write && ret == 0) 207 call_netevent_notifiers(NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE, 208 net); 209 210 return ret; 211 } 212 213 static int proc_tcp_congestion_control(struct ctl_table *ctl, int write, 214 void *buffer, size_t *lenp, loff_t *ppos) 215 { 216 struct net *net = container_of(ctl->data, struct net, 217 ipv4.tcp_congestion_control); 218 char val[TCP_CA_NAME_MAX]; 219 struct ctl_table tbl = { 220 .data = val, 221 .maxlen = TCP_CA_NAME_MAX, 222 }; 223 int ret; 224 225 tcp_get_default_congestion_control(net, val); 226 227 ret = proc_dostring(&tbl, write, buffer, lenp, ppos); 228 if (write && ret == 0) 229 ret = tcp_set_default_congestion_control(net, val); 230 return ret; 231 } 232 233 static int proc_tcp_available_congestion_control(struct ctl_table *ctl, 234 int write, void *buffer, 235 size_t *lenp, loff_t *ppos) 236 { 237 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; 238 int ret; 239 240 tbl.data = kmalloc(tbl.maxlen, GFP_USER); 241 if (!tbl.data) 242 return -ENOMEM; 243 tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); 244 ret = proc_dostring(&tbl, write, buffer, lenp, ppos); 245 kfree(tbl.data); 246 return ret; 247 } 248 249 static int proc_allowed_congestion_control(struct ctl_table *ctl, 250 int write, void *buffer, 251 size_t *lenp, loff_t *ppos) 252 { 253 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; 254 int ret; 255 256 tbl.data = kmalloc(tbl.maxlen, GFP_USER); 257 if (!tbl.data) 258 return -ENOMEM; 259 260 tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); 261 ret = proc_dostring(&tbl, write, buffer, lenp, ppos); 262 if (write && ret == 0) 263 ret = tcp_set_allowed_congestion_control(tbl.data); 264 kfree(tbl.data); 265 return ret; 266 } 267 268 static int sscanf_key(char *buf, __le32 *key) 269 { 270 u32 user_key[4]; 271 int i, ret = 0; 272 273 if (sscanf(buf, "%x-%x-%x-%x", user_key, user_key + 1, 274 user_key + 2, user_key + 3) != 4) { 275 ret = -EINVAL; 276 } else { 277 for (i = 0; i < ARRAY_SIZE(user_key); i++) 278 key[i] = cpu_to_le32(user_key[i]); 279 } 280 pr_debug("proc TFO key set 0x%x-%x-%x-%x <- 0x%s: %u\n", 281 user_key[0], user_key[1], user_key[2], user_key[3], buf, ret); 282 283 return ret; 284 } 285 286 static int proc_tcp_fastopen_key(struct ctl_table *table, int write, 287 void *buffer, size_t *lenp, loff_t *ppos) 288 { 289 struct net *net = container_of(table->data, struct net, 290 ipv4.sysctl_tcp_fastopen); 291 /* maxlen to print the list of keys in hex (*2), with dashes 292 * separating doublewords and a comma in between keys. 293 */ 294 struct ctl_table tbl = { .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 295 2 * TCP_FASTOPEN_KEY_MAX) + 296 (TCP_FASTOPEN_KEY_MAX * 5)) }; 297 u32 user_key[TCP_FASTOPEN_KEY_BUF_LENGTH / sizeof(u32)]; 298 __le32 key[TCP_FASTOPEN_KEY_BUF_LENGTH / sizeof(__le32)]; 299 char *backup_data; 300 int ret, i = 0, off = 0, n_keys; 301 302 tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL); 303 if (!tbl.data) 304 return -ENOMEM; 305 306 n_keys = tcp_fastopen_get_cipher(net, NULL, (u64 *)key); 307 if (!n_keys) { 308 memset(&key[0], 0, TCP_FASTOPEN_KEY_LENGTH); 309 n_keys = 1; 310 } 311 312 for (i = 0; i < n_keys * 4; i++) 313 user_key[i] = le32_to_cpu(key[i]); 314 315 for (i = 0; i < n_keys; i++) { 316 off += snprintf(tbl.data + off, tbl.maxlen - off, 317 "%08x-%08x-%08x-%08x", 318 user_key[i * 4], 319 user_key[i * 4 + 1], 320 user_key[i * 4 + 2], 321 user_key[i * 4 + 3]); 322 323 if (WARN_ON_ONCE(off >= tbl.maxlen - 1)) 324 break; 325 326 if (i + 1 < n_keys) 327 off += snprintf(tbl.data + off, tbl.maxlen - off, ","); 328 } 329 330 ret = proc_dostring(&tbl, write, buffer, lenp, ppos); 331 332 if (write && ret == 0) { 333 backup_data = strchr(tbl.data, ','); 334 if (backup_data) { 335 *backup_data = '\0'; 336 backup_data++; 337 } 338 if (sscanf_key(tbl.data, key)) { 339 ret = -EINVAL; 340 goto bad_key; 341 } 342 if (backup_data) { 343 if (sscanf_key(backup_data, key + 4)) { 344 ret = -EINVAL; 345 goto bad_key; 346 } 347 } 348 tcp_fastopen_reset_cipher(net, NULL, key, 349 backup_data ? key + 4 : NULL); 350 } 351 352 bad_key: 353 kfree(tbl.data); 354 return ret; 355 } 356 357 static int proc_tfo_blackhole_detect_timeout(struct ctl_table *table, 358 int write, void *buffer, 359 size_t *lenp, loff_t *ppos) 360 { 361 struct net *net = container_of(table->data, struct net, 362 ipv4.sysctl_tcp_fastopen_blackhole_timeout); 363 int ret; 364 365 ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); 366 if (write && ret == 0) 367 atomic_set(&net->ipv4.tfo_active_disable_times, 0); 368 369 return ret; 370 } 371 372 static int proc_tcp_available_ulp(struct ctl_table *ctl, 373 int write, void *buffer, size_t *lenp, 374 loff_t *ppos) 375 { 376 struct ctl_table tbl = { .maxlen = TCP_ULP_BUF_MAX, }; 377 int ret; 378 379 tbl.data = kmalloc(tbl.maxlen, GFP_USER); 380 if (!tbl.data) 381 return -ENOMEM; 382 tcp_get_available_ulp(tbl.data, TCP_ULP_BUF_MAX); 383 ret = proc_dostring(&tbl, write, buffer, lenp, ppos); 384 kfree(tbl.data); 385 386 return ret; 387 } 388 389 static int proc_tcp_ehash_entries(struct ctl_table *table, int write, 390 void *buffer, size_t *lenp, loff_t *ppos) 391 { 392 struct net *net = container_of(table->data, struct net, 393 ipv4.sysctl_tcp_child_ehash_entries); 394 struct inet_hashinfo *hinfo = net->ipv4.tcp_death_row.hashinfo; 395 int tcp_ehash_entries; 396 struct ctl_table tbl; 397 398 tcp_ehash_entries = hinfo->ehash_mask + 1; 399 400 /* A negative number indicates that the child netns 401 * shares the global ehash. 402 */ 403 if (!net_eq(net, &init_net) && !hinfo->pernet) 404 tcp_ehash_entries *= -1; 405 406 memset(&tbl, 0, sizeof(tbl)); 407 tbl.data = &tcp_ehash_entries; 408 tbl.maxlen = sizeof(int); 409 410 return proc_dointvec(&tbl, write, buffer, lenp, ppos); 411 } 412 413 static int proc_udp_hash_entries(struct ctl_table *table, int write, 414 void *buffer, size_t *lenp, loff_t *ppos) 415 { 416 struct net *net = container_of(table->data, struct net, 417 ipv4.sysctl_udp_child_hash_entries); 418 int udp_hash_entries; 419 struct ctl_table tbl; 420 421 udp_hash_entries = net->ipv4.udp_table->mask + 1; 422 423 /* A negative number indicates that the child netns 424 * shares the global udp_table. 425 */ 426 if (!net_eq(net, &init_net) && net->ipv4.udp_table == &udp_table) 427 udp_hash_entries *= -1; 428 429 memset(&tbl, 0, sizeof(tbl)); 430 tbl.data = &udp_hash_entries; 431 tbl.maxlen = sizeof(int); 432 433 return proc_dointvec(&tbl, write, buffer, lenp, ppos); 434 } 435 436 #ifdef CONFIG_IP_ROUTE_MULTIPATH 437 static int proc_fib_multipath_hash_policy(struct ctl_table *table, int write, 438 void *buffer, size_t *lenp, 439 loff_t *ppos) 440 { 441 struct net *net = container_of(table->data, struct net, 442 ipv4.sysctl_fib_multipath_hash_policy); 443 int ret; 444 445 ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos); 446 if (write && ret == 0) 447 call_netevent_notifiers(NETEVENT_IPV4_MPATH_HASH_UPDATE, net); 448 449 return ret; 450 } 451 452 static int proc_fib_multipath_hash_fields(struct ctl_table *table, int write, 453 void *buffer, size_t *lenp, 454 loff_t *ppos) 455 { 456 struct net *net; 457 int ret; 458 459 net = container_of(table->data, struct net, 460 ipv4.sysctl_fib_multipath_hash_fields); 461 ret = proc_douintvec_minmax(table, write, buffer, lenp, ppos); 462 if (write && ret == 0) 463 call_netevent_notifiers(NETEVENT_IPV4_MPATH_HASH_UPDATE, net); 464 465 return ret; 466 } 467 #endif 468 469 static struct ctl_table ipv4_table[] = { 470 { 471 .procname = "tcp_max_orphans", 472 .data = &sysctl_tcp_max_orphans, 473 .maxlen = sizeof(int), 474 .mode = 0644, 475 .proc_handler = proc_dointvec 476 }, 477 { 478 .procname = "inet_peer_threshold", 479 .data = &inet_peer_threshold, 480 .maxlen = sizeof(int), 481 .mode = 0644, 482 .proc_handler = proc_dointvec 483 }, 484 { 485 .procname = "inet_peer_minttl", 486 .data = &inet_peer_minttl, 487 .maxlen = sizeof(int), 488 .mode = 0644, 489 .proc_handler = proc_dointvec_jiffies, 490 }, 491 { 492 .procname = "inet_peer_maxttl", 493 .data = &inet_peer_maxttl, 494 .maxlen = sizeof(int), 495 .mode = 0644, 496 .proc_handler = proc_dointvec_jiffies, 497 }, 498 { 499 .procname = "tcp_mem", 500 .maxlen = sizeof(sysctl_tcp_mem), 501 .data = &sysctl_tcp_mem, 502 .mode = 0644, 503 .proc_handler = proc_doulongvec_minmax, 504 }, 505 { 506 .procname = "tcp_low_latency", 507 .data = &sysctl_tcp_low_latency, 508 .maxlen = sizeof(int), 509 .mode = 0644, 510 .proc_handler = proc_dointvec 511 }, 512 #ifdef CONFIG_NETLABEL 513 { 514 .procname = "cipso_cache_enable", 515 .data = &cipso_v4_cache_enabled, 516 .maxlen = sizeof(int), 517 .mode = 0644, 518 .proc_handler = proc_dointvec, 519 }, 520 { 521 .procname = "cipso_cache_bucket_size", 522 .data = &cipso_v4_cache_bucketsize, 523 .maxlen = sizeof(int), 524 .mode = 0644, 525 .proc_handler = proc_dointvec, 526 }, 527 { 528 .procname = "cipso_rbm_optfmt", 529 .data = &cipso_v4_rbm_optfmt, 530 .maxlen = sizeof(int), 531 .mode = 0644, 532 .proc_handler = proc_dointvec, 533 }, 534 { 535 .procname = "cipso_rbm_strictvalid", 536 .data = &cipso_v4_rbm_strictvalid, 537 .maxlen = sizeof(int), 538 .mode = 0644, 539 .proc_handler = proc_dointvec, 540 }, 541 #endif /* CONFIG_NETLABEL */ 542 { 543 .procname = "tcp_available_ulp", 544 .maxlen = TCP_ULP_BUF_MAX, 545 .mode = 0444, 546 .proc_handler = proc_tcp_available_ulp, 547 }, 548 { 549 .procname = "icmp_msgs_per_sec", 550 .data = &sysctl_icmp_msgs_per_sec, 551 .maxlen = sizeof(int), 552 .mode = 0644, 553 .proc_handler = proc_dointvec_minmax, 554 .extra1 = SYSCTL_ZERO, 555 }, 556 { 557 .procname = "icmp_msgs_burst", 558 .data = &sysctl_icmp_msgs_burst, 559 .maxlen = sizeof(int), 560 .mode = 0644, 561 .proc_handler = proc_dointvec_minmax, 562 .extra1 = SYSCTL_ZERO, 563 }, 564 { 565 .procname = "udp_mem", 566 .data = &sysctl_udp_mem, 567 .maxlen = sizeof(sysctl_udp_mem), 568 .mode = 0644, 569 .proc_handler = proc_doulongvec_minmax, 570 }, 571 { 572 .procname = "fib_sync_mem", 573 .data = &sysctl_fib_sync_mem, 574 .maxlen = sizeof(sysctl_fib_sync_mem), 575 .mode = 0644, 576 .proc_handler = proc_douintvec_minmax, 577 .extra1 = &sysctl_fib_sync_mem_min, 578 .extra2 = &sysctl_fib_sync_mem_max, 579 }, 580 }; 581 582 static struct ctl_table ipv4_net_table[] = { 583 { 584 .procname = "tcp_max_tw_buckets", 585 .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets, 586 .maxlen = sizeof(int), 587 .mode = 0644, 588 .proc_handler = proc_dointvec 589 }, 590 { 591 .procname = "icmp_echo_ignore_all", 592 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, 593 .maxlen = sizeof(u8), 594 .mode = 0644, 595 .proc_handler = proc_dou8vec_minmax, 596 .extra1 = SYSCTL_ZERO, 597 .extra2 = SYSCTL_ONE 598 }, 599 { 600 .procname = "icmp_echo_enable_probe", 601 .data = &init_net.ipv4.sysctl_icmp_echo_enable_probe, 602 .maxlen = sizeof(u8), 603 .mode = 0644, 604 .proc_handler = proc_dou8vec_minmax, 605 .extra1 = SYSCTL_ZERO, 606 .extra2 = SYSCTL_ONE 607 }, 608 { 609 .procname = "icmp_echo_ignore_broadcasts", 610 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, 611 .maxlen = sizeof(u8), 612 .mode = 0644, 613 .proc_handler = proc_dou8vec_minmax, 614 .extra1 = SYSCTL_ZERO, 615 .extra2 = SYSCTL_ONE 616 }, 617 { 618 .procname = "icmp_ignore_bogus_error_responses", 619 .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, 620 .maxlen = sizeof(u8), 621 .mode = 0644, 622 .proc_handler = proc_dou8vec_minmax, 623 .extra1 = SYSCTL_ZERO, 624 .extra2 = SYSCTL_ONE 625 }, 626 { 627 .procname = "icmp_errors_use_inbound_ifaddr", 628 .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, 629 .maxlen = sizeof(u8), 630 .mode = 0644, 631 .proc_handler = proc_dou8vec_minmax, 632 .extra1 = SYSCTL_ZERO, 633 .extra2 = SYSCTL_ONE 634 }, 635 { 636 .procname = "icmp_ratelimit", 637 .data = &init_net.ipv4.sysctl_icmp_ratelimit, 638 .maxlen = sizeof(int), 639 .mode = 0644, 640 .proc_handler = proc_dointvec_ms_jiffies, 641 }, 642 { 643 .procname = "icmp_ratemask", 644 .data = &init_net.ipv4.sysctl_icmp_ratemask, 645 .maxlen = sizeof(int), 646 .mode = 0644, 647 .proc_handler = proc_dointvec 648 }, 649 { 650 .procname = "ping_group_range", 651 .data = &init_net.ipv4.ping_group_range.range, 652 .maxlen = sizeof(gid_t)*2, 653 .mode = 0644, 654 .proc_handler = ipv4_ping_group_range, 655 }, 656 #ifdef CONFIG_NET_L3_MASTER_DEV 657 { 658 .procname = "raw_l3mdev_accept", 659 .data = &init_net.ipv4.sysctl_raw_l3mdev_accept, 660 .maxlen = sizeof(u8), 661 .mode = 0644, 662 .proc_handler = proc_dou8vec_minmax, 663 .extra1 = SYSCTL_ZERO, 664 .extra2 = SYSCTL_ONE, 665 }, 666 #endif 667 { 668 .procname = "tcp_ecn", 669 .data = &init_net.ipv4.sysctl_tcp_ecn, 670 .maxlen = sizeof(u8), 671 .mode = 0644, 672 .proc_handler = proc_dou8vec_minmax, 673 .extra1 = SYSCTL_ZERO, 674 .extra2 = SYSCTL_TWO, 675 }, 676 { 677 .procname = "tcp_ecn_fallback", 678 .data = &init_net.ipv4.sysctl_tcp_ecn_fallback, 679 .maxlen = sizeof(u8), 680 .mode = 0644, 681 .proc_handler = proc_dou8vec_minmax, 682 .extra1 = SYSCTL_ZERO, 683 .extra2 = SYSCTL_ONE, 684 }, 685 { 686 .procname = "ip_dynaddr", 687 .data = &init_net.ipv4.sysctl_ip_dynaddr, 688 .maxlen = sizeof(u8), 689 .mode = 0644, 690 .proc_handler = proc_dou8vec_minmax, 691 }, 692 { 693 .procname = "ip_early_demux", 694 .data = &init_net.ipv4.sysctl_ip_early_demux, 695 .maxlen = sizeof(u8), 696 .mode = 0644, 697 .proc_handler = proc_dou8vec_minmax, 698 }, 699 { 700 .procname = "udp_early_demux", 701 .data = &init_net.ipv4.sysctl_udp_early_demux, 702 .maxlen = sizeof(u8), 703 .mode = 0644, 704 .proc_handler = proc_dou8vec_minmax, 705 }, 706 { 707 .procname = "tcp_early_demux", 708 .data = &init_net.ipv4.sysctl_tcp_early_demux, 709 .maxlen = sizeof(u8), 710 .mode = 0644, 711 .proc_handler = proc_dou8vec_minmax, 712 }, 713 { 714 .procname = "nexthop_compat_mode", 715 .data = &init_net.ipv4.sysctl_nexthop_compat_mode, 716 .maxlen = sizeof(u8), 717 .mode = 0644, 718 .proc_handler = proc_dou8vec_minmax, 719 .extra1 = SYSCTL_ZERO, 720 .extra2 = SYSCTL_ONE, 721 }, 722 { 723 .procname = "ip_default_ttl", 724 .data = &init_net.ipv4.sysctl_ip_default_ttl, 725 .maxlen = sizeof(u8), 726 .mode = 0644, 727 .proc_handler = proc_dou8vec_minmax, 728 .extra1 = &ip_ttl_min, 729 .extra2 = &ip_ttl_max, 730 }, 731 { 732 .procname = "ip_local_port_range", 733 .maxlen = 0, 734 .data = &init_net, 735 .mode = 0644, 736 .proc_handler = ipv4_local_port_range, 737 }, 738 { 739 .procname = "ip_local_reserved_ports", 740 .data = &init_net.ipv4.sysctl_local_reserved_ports, 741 .maxlen = 65536, 742 .mode = 0644, 743 .proc_handler = proc_do_large_bitmap, 744 }, 745 { 746 .procname = "ip_no_pmtu_disc", 747 .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc, 748 .maxlen = sizeof(u8), 749 .mode = 0644, 750 .proc_handler = proc_dou8vec_minmax, 751 }, 752 { 753 .procname = "ip_forward_use_pmtu", 754 .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu, 755 .maxlen = sizeof(u8), 756 .mode = 0644, 757 .proc_handler = proc_dou8vec_minmax, 758 }, 759 { 760 .procname = "ip_forward_update_priority", 761 .data = &init_net.ipv4.sysctl_ip_fwd_update_priority, 762 .maxlen = sizeof(u8), 763 .mode = 0644, 764 .proc_handler = ipv4_fwd_update_priority, 765 .extra1 = SYSCTL_ZERO, 766 .extra2 = SYSCTL_ONE, 767 }, 768 { 769 .procname = "ip_nonlocal_bind", 770 .data = &init_net.ipv4.sysctl_ip_nonlocal_bind, 771 .maxlen = sizeof(u8), 772 .mode = 0644, 773 .proc_handler = proc_dou8vec_minmax, 774 }, 775 { 776 .procname = "ip_autobind_reuse", 777 .data = &init_net.ipv4.sysctl_ip_autobind_reuse, 778 .maxlen = sizeof(u8), 779 .mode = 0644, 780 .proc_handler = proc_dou8vec_minmax, 781 .extra1 = SYSCTL_ZERO, 782 .extra2 = SYSCTL_ONE, 783 }, 784 { 785 .procname = "fwmark_reflect", 786 .data = &init_net.ipv4.sysctl_fwmark_reflect, 787 .maxlen = sizeof(u8), 788 .mode = 0644, 789 .proc_handler = proc_dou8vec_minmax, 790 }, 791 { 792 .procname = "tcp_fwmark_accept", 793 .data = &init_net.ipv4.sysctl_tcp_fwmark_accept, 794 .maxlen = sizeof(u8), 795 .mode = 0644, 796 .proc_handler = proc_dou8vec_minmax, 797 }, 798 #ifdef CONFIG_NET_L3_MASTER_DEV 799 { 800 .procname = "tcp_l3mdev_accept", 801 .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept, 802 .maxlen = sizeof(u8), 803 .mode = 0644, 804 .proc_handler = proc_dou8vec_minmax, 805 .extra1 = SYSCTL_ZERO, 806 .extra2 = SYSCTL_ONE, 807 }, 808 #endif 809 { 810 .procname = "tcp_mtu_probing", 811 .data = &init_net.ipv4.sysctl_tcp_mtu_probing, 812 .maxlen = sizeof(u8), 813 .mode = 0644, 814 .proc_handler = proc_dou8vec_minmax, 815 }, 816 { 817 .procname = "tcp_base_mss", 818 .data = &init_net.ipv4.sysctl_tcp_base_mss, 819 .maxlen = sizeof(int), 820 .mode = 0644, 821 .proc_handler = proc_dointvec, 822 }, 823 { 824 .procname = "tcp_min_snd_mss", 825 .data = &init_net.ipv4.sysctl_tcp_min_snd_mss, 826 .maxlen = sizeof(int), 827 .mode = 0644, 828 .proc_handler = proc_dointvec_minmax, 829 .extra1 = &tcp_min_snd_mss_min, 830 .extra2 = &tcp_min_snd_mss_max, 831 }, 832 { 833 .procname = "tcp_mtu_probe_floor", 834 .data = &init_net.ipv4.sysctl_tcp_mtu_probe_floor, 835 .maxlen = sizeof(int), 836 .mode = 0644, 837 .proc_handler = proc_dointvec_minmax, 838 .extra1 = &tcp_min_snd_mss_min, 839 .extra2 = &tcp_min_snd_mss_max, 840 }, 841 { 842 .procname = "tcp_probe_threshold", 843 .data = &init_net.ipv4.sysctl_tcp_probe_threshold, 844 .maxlen = sizeof(int), 845 .mode = 0644, 846 .proc_handler = proc_dointvec, 847 }, 848 { 849 .procname = "tcp_probe_interval", 850 .data = &init_net.ipv4.sysctl_tcp_probe_interval, 851 .maxlen = sizeof(u32), 852 .mode = 0644, 853 .proc_handler = proc_douintvec_minmax, 854 .extra2 = &u32_max_div_HZ, 855 }, 856 { 857 .procname = "igmp_link_local_mcast_reports", 858 .data = &init_net.ipv4.sysctl_igmp_llm_reports, 859 .maxlen = sizeof(u8), 860 .mode = 0644, 861 .proc_handler = proc_dou8vec_minmax, 862 }, 863 { 864 .procname = "igmp_max_memberships", 865 .data = &init_net.ipv4.sysctl_igmp_max_memberships, 866 .maxlen = sizeof(int), 867 .mode = 0644, 868 .proc_handler = proc_dointvec 869 }, 870 { 871 .procname = "igmp_max_msf", 872 .data = &init_net.ipv4.sysctl_igmp_max_msf, 873 .maxlen = sizeof(int), 874 .mode = 0644, 875 .proc_handler = proc_dointvec 876 }, 877 #ifdef CONFIG_IP_MULTICAST 878 { 879 .procname = "igmp_qrv", 880 .data = &init_net.ipv4.sysctl_igmp_qrv, 881 .maxlen = sizeof(int), 882 .mode = 0644, 883 .proc_handler = proc_dointvec_minmax, 884 .extra1 = SYSCTL_ONE 885 }, 886 #endif 887 { 888 .procname = "tcp_congestion_control", 889 .data = &init_net.ipv4.tcp_congestion_control, 890 .mode = 0644, 891 .maxlen = TCP_CA_NAME_MAX, 892 .proc_handler = proc_tcp_congestion_control, 893 }, 894 { 895 .procname = "tcp_available_congestion_control", 896 .maxlen = TCP_CA_BUF_MAX, 897 .mode = 0444, 898 .proc_handler = proc_tcp_available_congestion_control, 899 }, 900 { 901 .procname = "tcp_allowed_congestion_control", 902 .maxlen = TCP_CA_BUF_MAX, 903 .mode = 0644, 904 .proc_handler = proc_allowed_congestion_control, 905 }, 906 { 907 .procname = "tcp_keepalive_time", 908 .data = &init_net.ipv4.sysctl_tcp_keepalive_time, 909 .maxlen = sizeof(int), 910 .mode = 0644, 911 .proc_handler = proc_dointvec_jiffies, 912 }, 913 { 914 .procname = "tcp_keepalive_probes", 915 .data = &init_net.ipv4.sysctl_tcp_keepalive_probes, 916 .maxlen = sizeof(u8), 917 .mode = 0644, 918 .proc_handler = proc_dou8vec_minmax, 919 }, 920 { 921 .procname = "tcp_keepalive_intvl", 922 .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl, 923 .maxlen = sizeof(int), 924 .mode = 0644, 925 .proc_handler = proc_dointvec_jiffies, 926 }, 927 { 928 .procname = "tcp_syn_retries", 929 .data = &init_net.ipv4.sysctl_tcp_syn_retries, 930 .maxlen = sizeof(u8), 931 .mode = 0644, 932 .proc_handler = proc_dou8vec_minmax, 933 .extra1 = &tcp_syn_retries_min, 934 .extra2 = &tcp_syn_retries_max 935 }, 936 { 937 .procname = "tcp_synack_retries", 938 .data = &init_net.ipv4.sysctl_tcp_synack_retries, 939 .maxlen = sizeof(u8), 940 .mode = 0644, 941 .proc_handler = proc_dou8vec_minmax, 942 }, 943 #ifdef CONFIG_SYN_COOKIES 944 { 945 .procname = "tcp_syncookies", 946 .data = &init_net.ipv4.sysctl_tcp_syncookies, 947 .maxlen = sizeof(u8), 948 .mode = 0644, 949 .proc_handler = proc_dou8vec_minmax, 950 }, 951 #endif 952 { 953 .procname = "tcp_migrate_req", 954 .data = &init_net.ipv4.sysctl_tcp_migrate_req, 955 .maxlen = sizeof(u8), 956 .mode = 0644, 957 .proc_handler = proc_dou8vec_minmax, 958 .extra1 = SYSCTL_ZERO, 959 .extra2 = SYSCTL_ONE 960 }, 961 { 962 .procname = "tcp_reordering", 963 .data = &init_net.ipv4.sysctl_tcp_reordering, 964 .maxlen = sizeof(int), 965 .mode = 0644, 966 .proc_handler = proc_dointvec 967 }, 968 { 969 .procname = "tcp_retries1", 970 .data = &init_net.ipv4.sysctl_tcp_retries1, 971 .maxlen = sizeof(u8), 972 .mode = 0644, 973 .proc_handler = proc_dou8vec_minmax, 974 .extra2 = &tcp_retr1_max 975 }, 976 { 977 .procname = "tcp_retries2", 978 .data = &init_net.ipv4.sysctl_tcp_retries2, 979 .maxlen = sizeof(u8), 980 .mode = 0644, 981 .proc_handler = proc_dou8vec_minmax, 982 }, 983 { 984 .procname = "tcp_orphan_retries", 985 .data = &init_net.ipv4.sysctl_tcp_orphan_retries, 986 .maxlen = sizeof(u8), 987 .mode = 0644, 988 .proc_handler = proc_dou8vec_minmax, 989 }, 990 { 991 .procname = "tcp_fin_timeout", 992 .data = &init_net.ipv4.sysctl_tcp_fin_timeout, 993 .maxlen = sizeof(int), 994 .mode = 0644, 995 .proc_handler = proc_dointvec_jiffies, 996 }, 997 { 998 .procname = "tcp_notsent_lowat", 999 .data = &init_net.ipv4.sysctl_tcp_notsent_lowat, 1000 .maxlen = sizeof(unsigned int), 1001 .mode = 0644, 1002 .proc_handler = proc_douintvec, 1003 }, 1004 { 1005 .procname = "tcp_tw_reuse", 1006 .data = &init_net.ipv4.sysctl_tcp_tw_reuse, 1007 .maxlen = sizeof(u8), 1008 .mode = 0644, 1009 .proc_handler = proc_dou8vec_minmax, 1010 .extra1 = SYSCTL_ZERO, 1011 .extra2 = SYSCTL_TWO, 1012 }, 1013 { 1014 .procname = "tcp_max_syn_backlog", 1015 .data = &init_net.ipv4.sysctl_max_syn_backlog, 1016 .maxlen = sizeof(int), 1017 .mode = 0644, 1018 .proc_handler = proc_dointvec 1019 }, 1020 { 1021 .procname = "tcp_fastopen", 1022 .data = &init_net.ipv4.sysctl_tcp_fastopen, 1023 .maxlen = sizeof(int), 1024 .mode = 0644, 1025 .proc_handler = proc_dointvec, 1026 }, 1027 { 1028 .procname = "tcp_fastopen_key", 1029 .mode = 0600, 1030 .data = &init_net.ipv4.sysctl_tcp_fastopen, 1031 /* maxlen to print the list of keys in hex (*2), with dashes 1032 * separating doublewords and a comma in between keys. 1033 */ 1034 .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 1035 2 * TCP_FASTOPEN_KEY_MAX) + 1036 (TCP_FASTOPEN_KEY_MAX * 5)), 1037 .proc_handler = proc_tcp_fastopen_key, 1038 }, 1039 { 1040 .procname = "tcp_fastopen_blackhole_timeout_sec", 1041 .data = &init_net.ipv4.sysctl_tcp_fastopen_blackhole_timeout, 1042 .maxlen = sizeof(int), 1043 .mode = 0644, 1044 .proc_handler = proc_tfo_blackhole_detect_timeout, 1045 .extra1 = SYSCTL_ZERO, 1046 }, 1047 #ifdef CONFIG_IP_ROUTE_MULTIPATH 1048 { 1049 .procname = "fib_multipath_use_neigh", 1050 .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh, 1051 .maxlen = sizeof(u8), 1052 .mode = 0644, 1053 .proc_handler = proc_dou8vec_minmax, 1054 .extra1 = SYSCTL_ZERO, 1055 .extra2 = SYSCTL_ONE, 1056 }, 1057 { 1058 .procname = "fib_multipath_hash_policy", 1059 .data = &init_net.ipv4.sysctl_fib_multipath_hash_policy, 1060 .maxlen = sizeof(u8), 1061 .mode = 0644, 1062 .proc_handler = proc_fib_multipath_hash_policy, 1063 .extra1 = SYSCTL_ZERO, 1064 .extra2 = SYSCTL_THREE, 1065 }, 1066 { 1067 .procname = "fib_multipath_hash_fields", 1068 .data = &init_net.ipv4.sysctl_fib_multipath_hash_fields, 1069 .maxlen = sizeof(u32), 1070 .mode = 0644, 1071 .proc_handler = proc_fib_multipath_hash_fields, 1072 .extra1 = SYSCTL_ONE, 1073 .extra2 = &fib_multipath_hash_fields_all_mask, 1074 }, 1075 #endif 1076 { 1077 .procname = "ip_unprivileged_port_start", 1078 .maxlen = sizeof(int), 1079 .data = &init_net.ipv4.sysctl_ip_prot_sock, 1080 .mode = 0644, 1081 .proc_handler = ipv4_privileged_ports, 1082 }, 1083 #ifdef CONFIG_NET_L3_MASTER_DEV 1084 { 1085 .procname = "udp_l3mdev_accept", 1086 .data = &init_net.ipv4.sysctl_udp_l3mdev_accept, 1087 .maxlen = sizeof(u8), 1088 .mode = 0644, 1089 .proc_handler = proc_dou8vec_minmax, 1090 .extra1 = SYSCTL_ZERO, 1091 .extra2 = SYSCTL_ONE, 1092 }, 1093 #endif 1094 { 1095 .procname = "tcp_sack", 1096 .data = &init_net.ipv4.sysctl_tcp_sack, 1097 .maxlen = sizeof(u8), 1098 .mode = 0644, 1099 .proc_handler = proc_dou8vec_minmax, 1100 }, 1101 { 1102 .procname = "tcp_window_scaling", 1103 .data = &init_net.ipv4.sysctl_tcp_window_scaling, 1104 .maxlen = sizeof(u8), 1105 .mode = 0644, 1106 .proc_handler = proc_dou8vec_minmax, 1107 }, 1108 { 1109 .procname = "tcp_timestamps", 1110 .data = &init_net.ipv4.sysctl_tcp_timestamps, 1111 .maxlen = sizeof(u8), 1112 .mode = 0644, 1113 .proc_handler = proc_dou8vec_minmax, 1114 }, 1115 { 1116 .procname = "tcp_early_retrans", 1117 .data = &init_net.ipv4.sysctl_tcp_early_retrans, 1118 .maxlen = sizeof(u8), 1119 .mode = 0644, 1120 .proc_handler = proc_dou8vec_minmax, 1121 .extra1 = SYSCTL_ZERO, 1122 .extra2 = SYSCTL_FOUR, 1123 }, 1124 { 1125 .procname = "tcp_recovery", 1126 .data = &init_net.ipv4.sysctl_tcp_recovery, 1127 .maxlen = sizeof(u8), 1128 .mode = 0644, 1129 .proc_handler = proc_dou8vec_minmax, 1130 }, 1131 { 1132 .procname = "tcp_thin_linear_timeouts", 1133 .data = &init_net.ipv4.sysctl_tcp_thin_linear_timeouts, 1134 .maxlen = sizeof(u8), 1135 .mode = 0644, 1136 .proc_handler = proc_dou8vec_minmax, 1137 }, 1138 { 1139 .procname = "tcp_slow_start_after_idle", 1140 .data = &init_net.ipv4.sysctl_tcp_slow_start_after_idle, 1141 .maxlen = sizeof(u8), 1142 .mode = 0644, 1143 .proc_handler = proc_dou8vec_minmax, 1144 }, 1145 { 1146 .procname = "tcp_retrans_collapse", 1147 .data = &init_net.ipv4.sysctl_tcp_retrans_collapse, 1148 .maxlen = sizeof(u8), 1149 .mode = 0644, 1150 .proc_handler = proc_dou8vec_minmax, 1151 }, 1152 { 1153 .procname = "tcp_stdurg", 1154 .data = &init_net.ipv4.sysctl_tcp_stdurg, 1155 .maxlen = sizeof(u8), 1156 .mode = 0644, 1157 .proc_handler = proc_dou8vec_minmax, 1158 }, 1159 { 1160 .procname = "tcp_rfc1337", 1161 .data = &init_net.ipv4.sysctl_tcp_rfc1337, 1162 .maxlen = sizeof(u8), 1163 .mode = 0644, 1164 .proc_handler = proc_dou8vec_minmax, 1165 }, 1166 { 1167 .procname = "tcp_abort_on_overflow", 1168 .data = &init_net.ipv4.sysctl_tcp_abort_on_overflow, 1169 .maxlen = sizeof(u8), 1170 .mode = 0644, 1171 .proc_handler = proc_dou8vec_minmax, 1172 }, 1173 { 1174 .procname = "tcp_fack", 1175 .data = &init_net.ipv4.sysctl_tcp_fack, 1176 .maxlen = sizeof(u8), 1177 .mode = 0644, 1178 .proc_handler = proc_dou8vec_minmax, 1179 }, 1180 { 1181 .procname = "tcp_max_reordering", 1182 .data = &init_net.ipv4.sysctl_tcp_max_reordering, 1183 .maxlen = sizeof(int), 1184 .mode = 0644, 1185 .proc_handler = proc_dointvec 1186 }, 1187 { 1188 .procname = "tcp_dsack", 1189 .data = &init_net.ipv4.sysctl_tcp_dsack, 1190 .maxlen = sizeof(u8), 1191 .mode = 0644, 1192 .proc_handler = proc_dou8vec_minmax, 1193 }, 1194 { 1195 .procname = "tcp_app_win", 1196 .data = &init_net.ipv4.sysctl_tcp_app_win, 1197 .maxlen = sizeof(u8), 1198 .mode = 0644, 1199 .proc_handler = proc_dou8vec_minmax, 1200 .extra1 = SYSCTL_ZERO, 1201 .extra2 = &tcp_app_win_max, 1202 }, 1203 { 1204 .procname = "tcp_adv_win_scale", 1205 .data = &init_net.ipv4.sysctl_tcp_adv_win_scale, 1206 .maxlen = sizeof(int), 1207 .mode = 0644, 1208 .proc_handler = proc_dointvec_minmax, 1209 .extra1 = &tcp_adv_win_scale_min, 1210 .extra2 = &tcp_adv_win_scale_max, 1211 }, 1212 { 1213 .procname = "tcp_frto", 1214 .data = &init_net.ipv4.sysctl_tcp_frto, 1215 .maxlen = sizeof(u8), 1216 .mode = 0644, 1217 .proc_handler = proc_dou8vec_minmax, 1218 }, 1219 { 1220 .procname = "tcp_no_metrics_save", 1221 .data = &init_net.ipv4.sysctl_tcp_nometrics_save, 1222 .maxlen = sizeof(u8), 1223 .mode = 0644, 1224 .proc_handler = proc_dou8vec_minmax, 1225 }, 1226 { 1227 .procname = "tcp_no_ssthresh_metrics_save", 1228 .data = &init_net.ipv4.sysctl_tcp_no_ssthresh_metrics_save, 1229 .maxlen = sizeof(u8), 1230 .mode = 0644, 1231 .proc_handler = proc_dou8vec_minmax, 1232 .extra1 = SYSCTL_ZERO, 1233 .extra2 = SYSCTL_ONE, 1234 }, 1235 { 1236 .procname = "tcp_moderate_rcvbuf", 1237 .data = &init_net.ipv4.sysctl_tcp_moderate_rcvbuf, 1238 .maxlen = sizeof(u8), 1239 .mode = 0644, 1240 .proc_handler = proc_dou8vec_minmax, 1241 }, 1242 { 1243 .procname = "tcp_tso_win_divisor", 1244 .data = &init_net.ipv4.sysctl_tcp_tso_win_divisor, 1245 .maxlen = sizeof(u8), 1246 .mode = 0644, 1247 .proc_handler = proc_dou8vec_minmax, 1248 }, 1249 { 1250 .procname = "tcp_workaround_signed_windows", 1251 .data = &init_net.ipv4.sysctl_tcp_workaround_signed_windows, 1252 .maxlen = sizeof(u8), 1253 .mode = 0644, 1254 .proc_handler = proc_dou8vec_minmax, 1255 }, 1256 { 1257 .procname = "tcp_limit_output_bytes", 1258 .data = &init_net.ipv4.sysctl_tcp_limit_output_bytes, 1259 .maxlen = sizeof(int), 1260 .mode = 0644, 1261 .proc_handler = proc_dointvec 1262 }, 1263 { 1264 .procname = "tcp_challenge_ack_limit", 1265 .data = &init_net.ipv4.sysctl_tcp_challenge_ack_limit, 1266 .maxlen = sizeof(int), 1267 .mode = 0644, 1268 .proc_handler = proc_dointvec 1269 }, 1270 { 1271 .procname = "tcp_min_tso_segs", 1272 .data = &init_net.ipv4.sysctl_tcp_min_tso_segs, 1273 .maxlen = sizeof(u8), 1274 .mode = 0644, 1275 .proc_handler = proc_dou8vec_minmax, 1276 .extra1 = SYSCTL_ONE, 1277 }, 1278 { 1279 .procname = "tcp_tso_rtt_log", 1280 .data = &init_net.ipv4.sysctl_tcp_tso_rtt_log, 1281 .maxlen = sizeof(u8), 1282 .mode = 0644, 1283 .proc_handler = proc_dou8vec_minmax, 1284 }, 1285 { 1286 .procname = "tcp_min_rtt_wlen", 1287 .data = &init_net.ipv4.sysctl_tcp_min_rtt_wlen, 1288 .maxlen = sizeof(int), 1289 .mode = 0644, 1290 .proc_handler = proc_dointvec_minmax, 1291 .extra1 = SYSCTL_ZERO, 1292 .extra2 = &one_day_secs 1293 }, 1294 { 1295 .procname = "tcp_autocorking", 1296 .data = &init_net.ipv4.sysctl_tcp_autocorking, 1297 .maxlen = sizeof(u8), 1298 .mode = 0644, 1299 .proc_handler = proc_dou8vec_minmax, 1300 .extra1 = SYSCTL_ZERO, 1301 .extra2 = SYSCTL_ONE, 1302 }, 1303 { 1304 .procname = "tcp_invalid_ratelimit", 1305 .data = &init_net.ipv4.sysctl_tcp_invalid_ratelimit, 1306 .maxlen = sizeof(int), 1307 .mode = 0644, 1308 .proc_handler = proc_dointvec_ms_jiffies, 1309 }, 1310 { 1311 .procname = "tcp_pacing_ss_ratio", 1312 .data = &init_net.ipv4.sysctl_tcp_pacing_ss_ratio, 1313 .maxlen = sizeof(int), 1314 .mode = 0644, 1315 .proc_handler = proc_dointvec_minmax, 1316 .extra1 = SYSCTL_ZERO, 1317 .extra2 = SYSCTL_ONE_THOUSAND, 1318 }, 1319 { 1320 .procname = "tcp_pacing_ca_ratio", 1321 .data = &init_net.ipv4.sysctl_tcp_pacing_ca_ratio, 1322 .maxlen = sizeof(int), 1323 .mode = 0644, 1324 .proc_handler = proc_dointvec_minmax, 1325 .extra1 = SYSCTL_ZERO, 1326 .extra2 = SYSCTL_ONE_THOUSAND, 1327 }, 1328 { 1329 .procname = "tcp_wmem", 1330 .data = &init_net.ipv4.sysctl_tcp_wmem, 1331 .maxlen = sizeof(init_net.ipv4.sysctl_tcp_wmem), 1332 .mode = 0644, 1333 .proc_handler = proc_dointvec_minmax, 1334 .extra1 = SYSCTL_ONE, 1335 }, 1336 { 1337 .procname = "tcp_rmem", 1338 .data = &init_net.ipv4.sysctl_tcp_rmem, 1339 .maxlen = sizeof(init_net.ipv4.sysctl_tcp_rmem), 1340 .mode = 0644, 1341 .proc_handler = proc_dointvec_minmax, 1342 .extra1 = SYSCTL_ONE, 1343 }, 1344 { 1345 .procname = "tcp_comp_sack_delay_ns", 1346 .data = &init_net.ipv4.sysctl_tcp_comp_sack_delay_ns, 1347 .maxlen = sizeof(unsigned long), 1348 .mode = 0644, 1349 .proc_handler = proc_doulongvec_minmax, 1350 }, 1351 { 1352 .procname = "tcp_comp_sack_slack_ns", 1353 .data = &init_net.ipv4.sysctl_tcp_comp_sack_slack_ns, 1354 .maxlen = sizeof(unsigned long), 1355 .mode = 0644, 1356 .proc_handler = proc_doulongvec_minmax, 1357 }, 1358 { 1359 .procname = "tcp_comp_sack_nr", 1360 .data = &init_net.ipv4.sysctl_tcp_comp_sack_nr, 1361 .maxlen = sizeof(u8), 1362 .mode = 0644, 1363 .proc_handler = proc_dou8vec_minmax, 1364 .extra1 = SYSCTL_ZERO, 1365 }, 1366 { 1367 .procname = "tcp_backlog_ack_defer", 1368 .data = &init_net.ipv4.sysctl_tcp_backlog_ack_defer, 1369 .maxlen = sizeof(u8), 1370 .mode = 0644, 1371 .proc_handler = proc_dou8vec_minmax, 1372 .extra1 = SYSCTL_ZERO, 1373 .extra2 = SYSCTL_ONE, 1374 }, 1375 { 1376 .procname = "tcp_reflect_tos", 1377 .data = &init_net.ipv4.sysctl_tcp_reflect_tos, 1378 .maxlen = sizeof(u8), 1379 .mode = 0644, 1380 .proc_handler = proc_dou8vec_minmax, 1381 .extra1 = SYSCTL_ZERO, 1382 .extra2 = SYSCTL_ONE, 1383 }, 1384 { 1385 .procname = "tcp_ehash_entries", 1386 .data = &init_net.ipv4.sysctl_tcp_child_ehash_entries, 1387 .mode = 0444, 1388 .proc_handler = proc_tcp_ehash_entries, 1389 }, 1390 { 1391 .procname = "tcp_child_ehash_entries", 1392 .data = &init_net.ipv4.sysctl_tcp_child_ehash_entries, 1393 .maxlen = sizeof(unsigned int), 1394 .mode = 0644, 1395 .proc_handler = proc_douintvec_minmax, 1396 .extra1 = SYSCTL_ZERO, 1397 .extra2 = &tcp_child_ehash_entries_max, 1398 }, 1399 { 1400 .procname = "udp_hash_entries", 1401 .data = &init_net.ipv4.sysctl_udp_child_hash_entries, 1402 .mode = 0444, 1403 .proc_handler = proc_udp_hash_entries, 1404 }, 1405 { 1406 .procname = "udp_child_hash_entries", 1407 .data = &init_net.ipv4.sysctl_udp_child_hash_entries, 1408 .maxlen = sizeof(unsigned int), 1409 .mode = 0644, 1410 .proc_handler = proc_douintvec_minmax, 1411 .extra1 = SYSCTL_ZERO, 1412 .extra2 = &udp_child_hash_entries_max, 1413 }, 1414 { 1415 .procname = "udp_rmem_min", 1416 .data = &init_net.ipv4.sysctl_udp_rmem_min, 1417 .maxlen = sizeof(init_net.ipv4.sysctl_udp_rmem_min), 1418 .mode = 0644, 1419 .proc_handler = proc_dointvec_minmax, 1420 .extra1 = SYSCTL_ONE 1421 }, 1422 { 1423 .procname = "udp_wmem_min", 1424 .data = &init_net.ipv4.sysctl_udp_wmem_min, 1425 .maxlen = sizeof(init_net.ipv4.sysctl_udp_wmem_min), 1426 .mode = 0644, 1427 .proc_handler = proc_dointvec_minmax, 1428 .extra1 = SYSCTL_ONE 1429 }, 1430 { 1431 .procname = "fib_notify_on_flag_change", 1432 .data = &init_net.ipv4.sysctl_fib_notify_on_flag_change, 1433 .maxlen = sizeof(u8), 1434 .mode = 0644, 1435 .proc_handler = proc_dou8vec_minmax, 1436 .extra1 = SYSCTL_ZERO, 1437 .extra2 = SYSCTL_TWO, 1438 }, 1439 { 1440 .procname = "tcp_plb_enabled", 1441 .data = &init_net.ipv4.sysctl_tcp_plb_enabled, 1442 .maxlen = sizeof(u8), 1443 .mode = 0644, 1444 .proc_handler = proc_dou8vec_minmax, 1445 .extra1 = SYSCTL_ZERO, 1446 .extra2 = SYSCTL_ONE, 1447 }, 1448 { 1449 .procname = "tcp_plb_idle_rehash_rounds", 1450 .data = &init_net.ipv4.sysctl_tcp_plb_idle_rehash_rounds, 1451 .maxlen = sizeof(u8), 1452 .mode = 0644, 1453 .proc_handler = proc_dou8vec_minmax, 1454 .extra2 = &tcp_plb_max_rounds, 1455 }, 1456 { 1457 .procname = "tcp_plb_rehash_rounds", 1458 .data = &init_net.ipv4.sysctl_tcp_plb_rehash_rounds, 1459 .maxlen = sizeof(u8), 1460 .mode = 0644, 1461 .proc_handler = proc_dou8vec_minmax, 1462 .extra2 = &tcp_plb_max_rounds, 1463 }, 1464 { 1465 .procname = "tcp_plb_suspend_rto_sec", 1466 .data = &init_net.ipv4.sysctl_tcp_plb_suspend_rto_sec, 1467 .maxlen = sizeof(u8), 1468 .mode = 0644, 1469 .proc_handler = proc_dou8vec_minmax, 1470 }, 1471 { 1472 .procname = "tcp_plb_cong_thresh", 1473 .data = &init_net.ipv4.sysctl_tcp_plb_cong_thresh, 1474 .maxlen = sizeof(int), 1475 .mode = 0644, 1476 .proc_handler = proc_dointvec_minmax, 1477 .extra1 = SYSCTL_ZERO, 1478 .extra2 = &tcp_plb_max_cong_thresh, 1479 }, 1480 { 1481 .procname = "tcp_syn_linear_timeouts", 1482 .data = &init_net.ipv4.sysctl_tcp_syn_linear_timeouts, 1483 .maxlen = sizeof(u8), 1484 .mode = 0644, 1485 .proc_handler = proc_dou8vec_minmax, 1486 .extra1 = SYSCTL_ZERO, 1487 .extra2 = &tcp_syn_linear_timeouts_max, 1488 }, 1489 { 1490 .procname = "tcp_shrink_window", 1491 .data = &init_net.ipv4.sysctl_tcp_shrink_window, 1492 .maxlen = sizeof(u8), 1493 .mode = 0644, 1494 .proc_handler = proc_dou8vec_minmax, 1495 .extra1 = SYSCTL_ZERO, 1496 .extra2 = SYSCTL_ONE, 1497 }, 1498 { 1499 .procname = "tcp_pingpong_thresh", 1500 .data = &init_net.ipv4.sysctl_tcp_pingpong_thresh, 1501 .maxlen = sizeof(u8), 1502 .mode = 0644, 1503 .proc_handler = proc_dou8vec_minmax, 1504 .extra1 = SYSCTL_ONE, 1505 }, 1506 { 1507 .procname = "tcp_rto_min_us", 1508 .data = &init_net.ipv4.sysctl_tcp_rto_min_us, 1509 .maxlen = sizeof(int), 1510 .mode = 0644, 1511 .proc_handler = proc_dointvec_minmax, 1512 .extra1 = SYSCTL_ONE, 1513 }, 1514 }; 1515 1516 static __net_init int ipv4_sysctl_init_net(struct net *net) 1517 { 1518 size_t table_size = ARRAY_SIZE(ipv4_net_table); 1519 struct ctl_table *table; 1520 1521 table = ipv4_net_table; 1522 if (!net_eq(net, &init_net)) { 1523 int i; 1524 1525 table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); 1526 if (!table) 1527 goto err_alloc; 1528 1529 for (i = 0; i < table_size; i++) { 1530 if (table[i].data) { 1531 /* Update the variables to point into 1532 * the current struct net 1533 */ 1534 table[i].data += (void *)net - (void *)&init_net; 1535 } else { 1536 /* Entries without data pointer are global; 1537 * Make them read-only in non-init_net ns 1538 */ 1539 table[i].mode &= ~0222; 1540 } 1541 } 1542 } 1543 1544 net->ipv4.ipv4_hdr = register_net_sysctl_sz(net, "net/ipv4", table, 1545 table_size); 1546 if (!net->ipv4.ipv4_hdr) 1547 goto err_reg; 1548 1549 net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL); 1550 if (!net->ipv4.sysctl_local_reserved_ports) 1551 goto err_ports; 1552 1553 return 0; 1554 1555 err_ports: 1556 unregister_net_sysctl_table(net->ipv4.ipv4_hdr); 1557 err_reg: 1558 if (!net_eq(net, &init_net)) 1559 kfree(table); 1560 err_alloc: 1561 return -ENOMEM; 1562 } 1563 1564 static __net_exit void ipv4_sysctl_exit_net(struct net *net) 1565 { 1566 const struct ctl_table *table; 1567 1568 kfree(net->ipv4.sysctl_local_reserved_ports); 1569 table = net->ipv4.ipv4_hdr->ctl_table_arg; 1570 unregister_net_sysctl_table(net->ipv4.ipv4_hdr); 1571 kfree(table); 1572 } 1573 1574 static __net_initdata struct pernet_operations ipv4_sysctl_ops = { 1575 .init = ipv4_sysctl_init_net, 1576 .exit = ipv4_sysctl_exit_net, 1577 }; 1578 1579 static __init int sysctl_ipv4_init(void) 1580 { 1581 struct ctl_table_header *hdr; 1582 1583 hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table); 1584 if (!hdr) 1585 return -ENOMEM; 1586 1587 if (register_pernet_subsys(&ipv4_sysctl_ops)) { 1588 unregister_net_sysctl_table(hdr); 1589 return -ENOMEM; 1590 } 1591 1592 return 0; 1593 } 1594 1595 __initcall(sysctl_ipv4_init); 1596