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