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