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