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