sysctl_net_ipv4.c 36 KB

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  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. #include <linux/mm.h>
  9. #include <linux/module.h>
  10. #include <linux/sysctl.h>
  11. #include <linux/igmp.h>
  12. #include <linux/inetdevice.h>
  13. #include <linux/seqlock.h>
  14. #include <linux/init.h>
  15. #include <linux/slab.h>
  16. #include <linux/nsproxy.h>
  17. #include <linux/swap.h>
  18. #include <net/snmp.h>
  19. #include <net/icmp.h>
  20. #include <net/ip.h>
  21. #include <net/route.h>
  22. #include <net/tcp.h>
  23. #include <net/udp.h>
  24. #include <net/cipso_ipv4.h>
  25. #include <net/inet_frag.h>
  26. #include <net/ping.h>
  27. #include <net/protocol.h>
  28. #include <net/netevent.h>
  29. static int two = 2;
  30. static int four = 4;
  31. static int thousand = 1000;
  32. static int gso_max_segs = GSO_MAX_SEGS;
  33. static int tcp_retr1_max = 255;
  34. static int ip_local_port_range_min[] = { 1, 1 };
  35. static int ip_local_port_range_max[] = { 65535, 65535 };
  36. static int tcp_adv_win_scale_min = -31;
  37. static int tcp_adv_win_scale_max = 31;
  38. static int tcp_min_snd_mss_min = TCP_MIN_SND_MSS;
  39. static int tcp_min_snd_mss_max = 65535;
  40. static int ip_privileged_port_min;
  41. static int ip_privileged_port_max = 65535;
  42. static int ip_ttl_min = 1;
  43. static int ip_ttl_max = 255;
  44. static int tcp_syn_retries_min = 1;
  45. static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
  46. static int ip_ping_group_range_min[] = { 0, 0 };
  47. static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
  48. static int comp_sack_nr_max = 255;
  49. static u32 u32_max_div_HZ = UINT_MAX / HZ;
  50. static int one_day_secs = 24 * 3600;
  51. /* obsolete */
  52. static int sysctl_tcp_low_latency __read_mostly;
  53. /* Update system visible IP port range */
  54. static void set_local_port_range(struct net *net, int range[2])
  55. {
  56. bool same_parity = !((range[0] ^ range[1]) & 1);
  57. write_seqlock_bh(&net->ipv4.ip_local_ports.lock);
  58. if (same_parity && !net->ipv4.ip_local_ports.warned) {
  59. net->ipv4.ip_local_ports.warned = true;
  60. pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n");
  61. }
  62. net->ipv4.ip_local_ports.range[0] = range[0];
  63. net->ipv4.ip_local_ports.range[1] = range[1];
  64. write_sequnlock_bh(&net->ipv4.ip_local_ports.lock);
  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. inet_get_local_port_range(net, &range[0], &range[1]);
  82. ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
  83. if (write && ret == 0) {
  84. /* Ensure that the upper limit is not smaller than the lower,
  85. * and that the lower does not encroach upon the privileged
  86. * port limit.
  87. */
  88. if ((range[1] < range[0]) ||
  89. (range[0] < net->ipv4.sysctl_ip_prot_sock))
  90. ret = -EINVAL;
  91. else
  92. set_local_port_range(net, range);
  93. }
  94. return ret;
  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. pports = net->ipv4.sysctl_ip_prot_sock;
  113. ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
  114. if (write && ret == 0) {
  115. inet_get_local_port_range(net, &range[0], &range[1]);
  116. /* Ensure that the local port range doesn't overlap with the
  117. * privileged port range.
  118. */
  119. if (range[0] < pports)
  120. ret = -EINVAL;
  121. else
  122. net->ipv4.sysctl_ip_prot_sock = pports;
  123. }
  124. return ret;
  125. }
  126. static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high)
  127. {
  128. kgid_t *data = table->data;
  129. struct net *net =
  130. container_of(table->data, struct net, ipv4.ping_group_range.range);
  131. unsigned int seq;
  132. do {
  133. seq = read_seqbegin(&net->ipv4.ping_group_range.lock);
  134. *low = data[0];
  135. *high = data[1];
  136. } while (read_seqretry(&net->ipv4.ping_group_range.lock, seq));
  137. }
  138. /* Update system visible IP port range */
  139. static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high)
  140. {
  141. kgid_t *data = table->data;
  142. struct net *net =
  143. container_of(table->data, struct net, ipv4.ping_group_range.range);
  144. write_seqlock(&net->ipv4.ping_group_range.lock);
  145. data[0] = low;
  146. data[1] = high;
  147. write_sequnlock(&net->ipv4.ping_group_range.lock);
  148. }
  149. /* Validate changes from /proc interface. */
  150. static int ipv4_ping_group_range(struct ctl_table *table, int write,
  151. void *buffer, size_t *lenp, loff_t *ppos)
  152. {
  153. struct user_namespace *user_ns = current_user_ns();
  154. int ret;
  155. gid_t urange[2];
  156. kgid_t low, high;
  157. struct ctl_table tmp = {
  158. .data = &urange,
  159. .maxlen = sizeof(urange),
  160. .mode = table->mode,
  161. .extra1 = &ip_ping_group_range_min,
  162. .extra2 = &ip_ping_group_range_max,
  163. };
  164. inet_get_ping_group_range_table(table, &low, &high);
  165. urange[0] = from_kgid_munged(user_ns, low);
  166. urange[1] = from_kgid_munged(user_ns, high);
  167. ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
  168. if (write && ret == 0) {
  169. low = make_kgid(user_ns, urange[0]);
  170. high = make_kgid(user_ns, urange[1]);
  171. if (!gid_valid(low) || !gid_valid(high))
  172. return -EINVAL;
  173. if (urange[1] < urange[0] || gid_lt(high, low)) {
  174. low = make_kgid(&init_user_ns, 1);
  175. high = make_kgid(&init_user_ns, 0);
  176. }
  177. set_ping_group_range(table, low, high);
  178. }
  179. return ret;
  180. }
  181. static int ipv4_fwd_update_priority(struct ctl_table *table, int write,
  182. void *buffer, size_t *lenp, loff_t *ppos)
  183. {
  184. struct net *net;
  185. int ret;
  186. net = container_of(table->data, struct net,
  187. ipv4.sysctl_ip_fwd_update_priority);
  188. ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
  189. if (write && ret == 0)
  190. call_netevent_notifiers(NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE,
  191. net);
  192. return ret;
  193. }
  194. static int proc_tcp_congestion_control(struct ctl_table *ctl, int write,
  195. void *buffer, size_t *lenp, loff_t *ppos)
  196. {
  197. struct net *net = container_of(ctl->data, struct net,
  198. ipv4.tcp_congestion_control);
  199. char val[TCP_CA_NAME_MAX];
  200. struct ctl_table tbl = {
  201. .data = val,
  202. .maxlen = TCP_CA_NAME_MAX,
  203. };
  204. int ret;
  205. tcp_get_default_congestion_control(net, val);
  206. ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
  207. if (write && ret == 0)
  208. ret = tcp_set_default_congestion_control(net, val);
  209. return ret;
  210. }
  211. static int proc_tcp_available_congestion_control(struct ctl_table *ctl,
  212. int write, void *buffer,
  213. size_t *lenp, loff_t *ppos)
  214. {
  215. struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
  216. int ret;
  217. tbl.data = kmalloc(tbl.maxlen, GFP_USER);
  218. if (!tbl.data)
  219. return -ENOMEM;
  220. tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
  221. ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
  222. kfree(tbl.data);
  223. return ret;
  224. }
  225. static int proc_allowed_congestion_control(struct ctl_table *ctl,
  226. int write, void *buffer,
  227. size_t *lenp, loff_t *ppos)
  228. {
  229. struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
  230. int ret;
  231. tbl.data = kmalloc(tbl.maxlen, GFP_USER);
  232. if (!tbl.data)
  233. return -ENOMEM;
  234. tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
  235. ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
  236. if (write && ret == 0)
  237. ret = tcp_set_allowed_congestion_control(tbl.data);
  238. kfree(tbl.data);
  239. return ret;
  240. }
  241. static int sscanf_key(char *buf, __le32 *key)
  242. {
  243. u32 user_key[4];
  244. int i, ret = 0;
  245. if (sscanf(buf, "%x-%x-%x-%x", user_key, user_key + 1,
  246. user_key + 2, user_key + 3) != 4) {
  247. ret = -EINVAL;
  248. } else {
  249. for (i = 0; i < ARRAY_SIZE(user_key); i++)
  250. key[i] = cpu_to_le32(user_key[i]);
  251. }
  252. pr_debug("proc TFO key set 0x%x-%x-%x-%x <- 0x%s: %u\n",
  253. user_key[0], user_key[1], user_key[2], user_key[3], buf, ret);
  254. return ret;
  255. }
  256. static int proc_tcp_fastopen_key(struct ctl_table *table, int write,
  257. void *buffer, size_t *lenp, loff_t *ppos)
  258. {
  259. struct net *net = container_of(table->data, struct net,
  260. ipv4.sysctl_tcp_fastopen);
  261. /* maxlen to print the list of keys in hex (*2), with dashes
  262. * separating doublewords and a comma in between keys.
  263. */
  264. struct ctl_table tbl = { .maxlen = ((TCP_FASTOPEN_KEY_LENGTH *
  265. 2 * TCP_FASTOPEN_KEY_MAX) +
  266. (TCP_FASTOPEN_KEY_MAX * 5)) };
  267. u32 user_key[TCP_FASTOPEN_KEY_BUF_LENGTH / sizeof(u32)];
  268. __le32 key[TCP_FASTOPEN_KEY_BUF_LENGTH / sizeof(__le32)];
  269. char *backup_data;
  270. int ret, i = 0, off = 0, n_keys;
  271. tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL);
  272. if (!tbl.data)
  273. return -ENOMEM;
  274. n_keys = tcp_fastopen_get_cipher(net, NULL, (u64 *)key);
  275. if (!n_keys) {
  276. memset(&key[0], 0, TCP_FASTOPEN_KEY_LENGTH);
  277. n_keys = 1;
  278. }
  279. for (i = 0; i < n_keys * 4; i++)
  280. user_key[i] = le32_to_cpu(key[i]);
  281. for (i = 0; i < n_keys; i++) {
  282. off += snprintf(tbl.data + off, tbl.maxlen - off,
  283. "%08x-%08x-%08x-%08x",
  284. user_key[i * 4],
  285. user_key[i * 4 + 1],
  286. user_key[i * 4 + 2],
  287. user_key[i * 4 + 3]);
  288. if (WARN_ON_ONCE(off >= tbl.maxlen - 1))
  289. break;
  290. if (i + 1 < n_keys)
  291. off += snprintf(tbl.data + off, tbl.maxlen - off, ",");
  292. }
  293. ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
  294. if (write && ret == 0) {
  295. backup_data = strchr(tbl.data, ',');
  296. if (backup_data) {
  297. *backup_data = '\0';
  298. backup_data++;
  299. }
  300. if (sscanf_key(tbl.data, key)) {
  301. ret = -EINVAL;
  302. goto bad_key;
  303. }
  304. if (backup_data) {
  305. if (sscanf_key(backup_data, key + 4)) {
  306. ret = -EINVAL;
  307. goto bad_key;
  308. }
  309. }
  310. tcp_fastopen_reset_cipher(net, NULL, key,
  311. backup_data ? key + 4 : NULL);
  312. }
  313. bad_key:
  314. kfree(tbl.data);
  315. return ret;
  316. }
  317. static void proc_configure_early_demux(int enabled, int protocol)
  318. {
  319. struct net_protocol *ipprot;
  320. #if IS_ENABLED(CONFIG_IPV6)
  321. struct inet6_protocol *ip6prot;
  322. #endif
  323. rcu_read_lock();
  324. ipprot = rcu_dereference(inet_protos[protocol]);
  325. if (ipprot)
  326. ipprot->early_demux = enabled ? ipprot->early_demux_handler :
  327. NULL;
  328. #if IS_ENABLED(CONFIG_IPV6)
  329. ip6prot = rcu_dereference(inet6_protos[protocol]);
  330. if (ip6prot)
  331. ip6prot->early_demux = enabled ? ip6prot->early_demux_handler :
  332. NULL;
  333. #endif
  334. rcu_read_unlock();
  335. }
  336. static int proc_tcp_early_demux(struct ctl_table *table, int write,
  337. void *buffer, size_t *lenp, loff_t *ppos)
  338. {
  339. int ret = 0;
  340. ret = proc_dointvec(table, write, buffer, lenp, ppos);
  341. if (write && !ret) {
  342. int enabled = init_net.ipv4.sysctl_tcp_early_demux;
  343. proc_configure_early_demux(enabled, IPPROTO_TCP);
  344. }
  345. return ret;
  346. }
  347. static int proc_udp_early_demux(struct ctl_table *table, int write,
  348. void *buffer, size_t *lenp, loff_t *ppos)
  349. {
  350. int ret = 0;
  351. ret = proc_dointvec(table, write, buffer, lenp, ppos);
  352. if (write && !ret) {
  353. int enabled = init_net.ipv4.sysctl_udp_early_demux;
  354. proc_configure_early_demux(enabled, IPPROTO_UDP);
  355. }
  356. return ret;
  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. ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
  366. if (write && ret == 0)
  367. atomic_set(&net->ipv4.tfo_active_disable_times, 0);
  368. return ret;
  369. }
  370. static int proc_tcp_available_ulp(struct ctl_table *ctl,
  371. int write, void *buffer, size_t *lenp,
  372. loff_t *ppos)
  373. {
  374. struct ctl_table tbl = { .maxlen = TCP_ULP_BUF_MAX, };
  375. int ret;
  376. tbl.data = kmalloc(tbl.maxlen, GFP_USER);
  377. if (!tbl.data)
  378. return -ENOMEM;
  379. tcp_get_available_ulp(tbl.data, TCP_ULP_BUF_MAX);
  380. ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
  381. kfree(tbl.data);
  382. return ret;
  383. }
  384. #ifdef CONFIG_IP_ROUTE_MULTIPATH
  385. static int proc_fib_multipath_hash_policy(struct ctl_table *table, int write,
  386. void *buffer, size_t *lenp,
  387. loff_t *ppos)
  388. {
  389. struct net *net = container_of(table->data, struct net,
  390. ipv4.sysctl_fib_multipath_hash_policy);
  391. int ret;
  392. ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
  393. if (write && ret == 0)
  394. call_netevent_notifiers(NETEVENT_IPV4_MPATH_HASH_UPDATE, net);
  395. return ret;
  396. }
  397. #endif
  398. static struct ctl_table ipv4_table[] = {
  399. {
  400. .procname = "tcp_max_orphans",
  401. .data = &sysctl_tcp_max_orphans,
  402. .maxlen = sizeof(int),
  403. .mode = 0644,
  404. .proc_handler = proc_dointvec
  405. },
  406. {
  407. .procname = "inet_peer_threshold",
  408. .data = &inet_peer_threshold,
  409. .maxlen = sizeof(int),
  410. .mode = 0644,
  411. .proc_handler = proc_dointvec
  412. },
  413. {
  414. .procname = "inet_peer_minttl",
  415. .data = &inet_peer_minttl,
  416. .maxlen = sizeof(int),
  417. .mode = 0644,
  418. .proc_handler = proc_dointvec_jiffies,
  419. },
  420. {
  421. .procname = "inet_peer_maxttl",
  422. .data = &inet_peer_maxttl,
  423. .maxlen = sizeof(int),
  424. .mode = 0644,
  425. .proc_handler = proc_dointvec_jiffies,
  426. },
  427. {
  428. .procname = "tcp_mem",
  429. .maxlen = sizeof(sysctl_tcp_mem),
  430. .data = &sysctl_tcp_mem,
  431. .mode = 0644,
  432. .proc_handler = proc_doulongvec_minmax,
  433. },
  434. {
  435. .procname = "tcp_low_latency",
  436. .data = &sysctl_tcp_low_latency,
  437. .maxlen = sizeof(int),
  438. .mode = 0644,
  439. .proc_handler = proc_dointvec
  440. },
  441. #ifdef CONFIG_NETLABEL
  442. {
  443. .procname = "cipso_cache_enable",
  444. .data = &cipso_v4_cache_enabled,
  445. .maxlen = sizeof(int),
  446. .mode = 0644,
  447. .proc_handler = proc_dointvec,
  448. },
  449. {
  450. .procname = "cipso_cache_bucket_size",
  451. .data = &cipso_v4_cache_bucketsize,
  452. .maxlen = sizeof(int),
  453. .mode = 0644,
  454. .proc_handler = proc_dointvec,
  455. },
  456. {
  457. .procname = "cipso_rbm_optfmt",
  458. .data = &cipso_v4_rbm_optfmt,
  459. .maxlen = sizeof(int),
  460. .mode = 0644,
  461. .proc_handler = proc_dointvec,
  462. },
  463. {
  464. .procname = "cipso_rbm_strictvalid",
  465. .data = &cipso_v4_rbm_strictvalid,
  466. .maxlen = sizeof(int),
  467. .mode = 0644,
  468. .proc_handler = proc_dointvec,
  469. },
  470. #endif /* CONFIG_NETLABEL */
  471. {
  472. .procname = "tcp_available_ulp",
  473. .maxlen = TCP_ULP_BUF_MAX,
  474. .mode = 0444,
  475. .proc_handler = proc_tcp_available_ulp,
  476. },
  477. {
  478. .procname = "icmp_msgs_per_sec",
  479. .data = &sysctl_icmp_msgs_per_sec,
  480. .maxlen = sizeof(int),
  481. .mode = 0644,
  482. .proc_handler = proc_dointvec_minmax,
  483. .extra1 = SYSCTL_ZERO,
  484. },
  485. {
  486. .procname = "icmp_msgs_burst",
  487. .data = &sysctl_icmp_msgs_burst,
  488. .maxlen = sizeof(int),
  489. .mode = 0644,
  490. .proc_handler = proc_dointvec_minmax,
  491. .extra1 = SYSCTL_ZERO,
  492. },
  493. {
  494. .procname = "udp_mem",
  495. .data = &sysctl_udp_mem,
  496. .maxlen = sizeof(sysctl_udp_mem),
  497. .mode = 0644,
  498. .proc_handler = proc_doulongvec_minmax,
  499. },
  500. {
  501. .procname = "fib_sync_mem",
  502. .data = &sysctl_fib_sync_mem,
  503. .maxlen = sizeof(sysctl_fib_sync_mem),
  504. .mode = 0644,
  505. .proc_handler = proc_douintvec_minmax,
  506. .extra1 = &sysctl_fib_sync_mem_min,
  507. .extra2 = &sysctl_fib_sync_mem_max,
  508. },
  509. {
  510. .procname = "tcp_rx_skb_cache",
  511. .data = &tcp_rx_skb_cache_key.key,
  512. .mode = 0644,
  513. .proc_handler = proc_do_static_key,
  514. },
  515. {
  516. .procname = "tcp_tx_skb_cache",
  517. .data = &tcp_tx_skb_cache_key.key,
  518. .mode = 0644,
  519. .proc_handler = proc_do_static_key,
  520. },
  521. { }
  522. };
  523. static struct ctl_table ipv4_net_table[] = {
  524. {
  525. .procname = "icmp_echo_ignore_all",
  526. .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
  527. .maxlen = sizeof(int),
  528. .mode = 0644,
  529. .proc_handler = proc_dointvec
  530. },
  531. {
  532. .procname = "icmp_echo_ignore_broadcasts",
  533. .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
  534. .maxlen = sizeof(int),
  535. .mode = 0644,
  536. .proc_handler = proc_dointvec
  537. },
  538. {
  539. .procname = "icmp_ignore_bogus_error_responses",
  540. .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
  541. .maxlen = sizeof(int),
  542. .mode = 0644,
  543. .proc_handler = proc_dointvec
  544. },
  545. {
  546. .procname = "icmp_errors_use_inbound_ifaddr",
  547. .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
  548. .maxlen = sizeof(int),
  549. .mode = 0644,
  550. .proc_handler = proc_dointvec
  551. },
  552. {
  553. .procname = "icmp_ratelimit",
  554. .data = &init_net.ipv4.sysctl_icmp_ratelimit,
  555. .maxlen = sizeof(int),
  556. .mode = 0644,
  557. .proc_handler = proc_dointvec_ms_jiffies,
  558. },
  559. {
  560. .procname = "icmp_ratemask",
  561. .data = &init_net.ipv4.sysctl_icmp_ratemask,
  562. .maxlen = sizeof(int),
  563. .mode = 0644,
  564. .proc_handler = proc_dointvec
  565. },
  566. {
  567. .procname = "ping_group_range",
  568. .data = &init_net.ipv4.ping_group_range.range,
  569. .maxlen = sizeof(gid_t)*2,
  570. .mode = 0644,
  571. .proc_handler = ipv4_ping_group_range,
  572. },
  573. #ifdef CONFIG_NET_L3_MASTER_DEV
  574. {
  575. .procname = "raw_l3mdev_accept",
  576. .data = &init_net.ipv4.sysctl_raw_l3mdev_accept,
  577. .maxlen = sizeof(int),
  578. .mode = 0644,
  579. .proc_handler = proc_dointvec_minmax,
  580. .extra1 = SYSCTL_ZERO,
  581. .extra2 = SYSCTL_ONE,
  582. },
  583. #endif
  584. {
  585. .procname = "tcp_ecn",
  586. .data = &init_net.ipv4.sysctl_tcp_ecn,
  587. .maxlen = sizeof(int),
  588. .mode = 0644,
  589. .proc_handler = proc_dointvec
  590. },
  591. {
  592. .procname = "tcp_ecn_fallback",
  593. .data = &init_net.ipv4.sysctl_tcp_ecn_fallback,
  594. .maxlen = sizeof(int),
  595. .mode = 0644,
  596. .proc_handler = proc_dointvec
  597. },
  598. {
  599. .procname = "ip_dynaddr",
  600. .data = &init_net.ipv4.sysctl_ip_dynaddr,
  601. .maxlen = sizeof(int),
  602. .mode = 0644,
  603. .proc_handler = proc_dointvec
  604. },
  605. {
  606. .procname = "ip_early_demux",
  607. .data = &init_net.ipv4.sysctl_ip_early_demux,
  608. .maxlen = sizeof(int),
  609. .mode = 0644,
  610. .proc_handler = proc_dointvec
  611. },
  612. {
  613. .procname = "udp_early_demux",
  614. .data = &init_net.ipv4.sysctl_udp_early_demux,
  615. .maxlen = sizeof(int),
  616. .mode = 0644,
  617. .proc_handler = proc_udp_early_demux
  618. },
  619. {
  620. .procname = "tcp_early_demux",
  621. .data = &init_net.ipv4.sysctl_tcp_early_demux,
  622. .maxlen = sizeof(int),
  623. .mode = 0644,
  624. .proc_handler = proc_tcp_early_demux
  625. },
  626. {
  627. .procname = "nexthop_compat_mode",
  628. .data = &init_net.ipv4.sysctl_nexthop_compat_mode,
  629. .maxlen = sizeof(int),
  630. .mode = 0644,
  631. .proc_handler = proc_dointvec_minmax,
  632. .extra1 = SYSCTL_ZERO,
  633. .extra2 = SYSCTL_ONE,
  634. },
  635. {
  636. .procname = "ip_default_ttl",
  637. .data = &init_net.ipv4.sysctl_ip_default_ttl,
  638. .maxlen = sizeof(int),
  639. .mode = 0644,
  640. .proc_handler = proc_dointvec_minmax,
  641. .extra1 = &ip_ttl_min,
  642. .extra2 = &ip_ttl_max,
  643. },
  644. {
  645. .procname = "ip_local_port_range",
  646. .maxlen = sizeof(init_net.ipv4.ip_local_ports.range),
  647. .data = &init_net.ipv4.ip_local_ports.range,
  648. .mode = 0644,
  649. .proc_handler = ipv4_local_port_range,
  650. },
  651. {
  652. .procname = "ip_local_reserved_ports",
  653. .data = &init_net.ipv4.sysctl_local_reserved_ports,
  654. .maxlen = 65536,
  655. .mode = 0644,
  656. .proc_handler = proc_do_large_bitmap,
  657. },
  658. {
  659. .procname = "ip_local_unbindable_ports",
  660. .data = &init_net.ipv4.sysctl_local_unbindable_ports,
  661. .maxlen = 65536,
  662. .mode = 0644,
  663. .proc_handler = proc_do_large_bitmap,
  664. },
  665. {
  666. .procname = "ip_no_pmtu_disc",
  667. .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc,
  668. .maxlen = sizeof(int),
  669. .mode = 0644,
  670. .proc_handler = proc_dointvec
  671. },
  672. {
  673. .procname = "ip_forward_use_pmtu",
  674. .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu,
  675. .maxlen = sizeof(int),
  676. .mode = 0644,
  677. .proc_handler = proc_dointvec,
  678. },
  679. {
  680. .procname = "ip_forward_update_priority",
  681. .data = &init_net.ipv4.sysctl_ip_fwd_update_priority,
  682. .maxlen = sizeof(int),
  683. .mode = 0644,
  684. .proc_handler = ipv4_fwd_update_priority,
  685. .extra1 = SYSCTL_ZERO,
  686. .extra2 = SYSCTL_ONE,
  687. },
  688. {
  689. .procname = "ip_nonlocal_bind",
  690. .data = &init_net.ipv4.sysctl_ip_nonlocal_bind,
  691. .maxlen = sizeof(int),
  692. .mode = 0644,
  693. .proc_handler = proc_dointvec
  694. },
  695. {
  696. .procname = "ip_autobind_reuse",
  697. .data = &init_net.ipv4.sysctl_ip_autobind_reuse,
  698. .maxlen = sizeof(int),
  699. .mode = 0644,
  700. .proc_handler = proc_dointvec_minmax,
  701. .extra1 = SYSCTL_ZERO,
  702. .extra2 = SYSCTL_ONE,
  703. },
  704. {
  705. .procname = "fwmark_reflect",
  706. .data = &init_net.ipv4.sysctl_fwmark_reflect,
  707. .maxlen = sizeof(int),
  708. .mode = 0644,
  709. .proc_handler = proc_dointvec,
  710. },
  711. {
  712. .procname = "tcp_fwmark_accept",
  713. .data = &init_net.ipv4.sysctl_tcp_fwmark_accept,
  714. .maxlen = sizeof(int),
  715. .mode = 0644,
  716. .proc_handler = proc_dointvec,
  717. },
  718. #ifdef CONFIG_NET_L3_MASTER_DEV
  719. {
  720. .procname = "tcp_l3mdev_accept",
  721. .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept,
  722. .maxlen = sizeof(int),
  723. .mode = 0644,
  724. .proc_handler = proc_dointvec_minmax,
  725. .extra1 = SYSCTL_ZERO,
  726. .extra2 = SYSCTL_ONE,
  727. },
  728. #endif
  729. {
  730. .procname = "tcp_mtu_probing",
  731. .data = &init_net.ipv4.sysctl_tcp_mtu_probing,
  732. .maxlen = sizeof(int),
  733. .mode = 0644,
  734. .proc_handler = proc_dointvec,
  735. },
  736. {
  737. .procname = "tcp_base_mss",
  738. .data = &init_net.ipv4.sysctl_tcp_base_mss,
  739. .maxlen = sizeof(int),
  740. .mode = 0644,
  741. .proc_handler = proc_dointvec,
  742. },
  743. {
  744. .procname = "tcp_min_snd_mss",
  745. .data = &init_net.ipv4.sysctl_tcp_min_snd_mss,
  746. .maxlen = sizeof(int),
  747. .mode = 0644,
  748. .proc_handler = proc_dointvec_minmax,
  749. .extra1 = &tcp_min_snd_mss_min,
  750. .extra2 = &tcp_min_snd_mss_max,
  751. },
  752. {
  753. .procname = "tcp_mtu_probe_floor",
  754. .data = &init_net.ipv4.sysctl_tcp_mtu_probe_floor,
  755. .maxlen = sizeof(int),
  756. .mode = 0644,
  757. .proc_handler = proc_dointvec_minmax,
  758. .extra1 = &tcp_min_snd_mss_min,
  759. .extra2 = &tcp_min_snd_mss_max,
  760. },
  761. {
  762. .procname = "tcp_probe_threshold",
  763. .data = &init_net.ipv4.sysctl_tcp_probe_threshold,
  764. .maxlen = sizeof(int),
  765. .mode = 0644,
  766. .proc_handler = proc_dointvec,
  767. },
  768. {
  769. .procname = "tcp_probe_interval",
  770. .data = &init_net.ipv4.sysctl_tcp_probe_interval,
  771. .maxlen = sizeof(u32),
  772. .mode = 0644,
  773. .proc_handler = proc_douintvec_minmax,
  774. .extra2 = &u32_max_div_HZ,
  775. },
  776. {
  777. .procname = "igmp_link_local_mcast_reports",
  778. .data = &init_net.ipv4.sysctl_igmp_llm_reports,
  779. .maxlen = sizeof(int),
  780. .mode = 0644,
  781. .proc_handler = proc_dointvec
  782. },
  783. {
  784. .procname = "igmp_max_memberships",
  785. .data = &init_net.ipv4.sysctl_igmp_max_memberships,
  786. .maxlen = sizeof(int),
  787. .mode = 0644,
  788. .proc_handler = proc_dointvec
  789. },
  790. {
  791. .procname = "igmp_max_msf",
  792. .data = &init_net.ipv4.sysctl_igmp_max_msf,
  793. .maxlen = sizeof(int),
  794. .mode = 0644,
  795. .proc_handler = proc_dointvec
  796. },
  797. #ifdef CONFIG_IP_MULTICAST
  798. {
  799. .procname = "igmp_qrv",
  800. .data = &init_net.ipv4.sysctl_igmp_qrv,
  801. .maxlen = sizeof(int),
  802. .mode = 0644,
  803. .proc_handler = proc_dointvec_minmax,
  804. .extra1 = SYSCTL_ONE
  805. },
  806. #endif
  807. {
  808. .procname = "tcp_congestion_control",
  809. .data = &init_net.ipv4.tcp_congestion_control,
  810. .mode = 0644,
  811. .maxlen = TCP_CA_NAME_MAX,
  812. .proc_handler = proc_tcp_congestion_control,
  813. },
  814. {
  815. .procname = "tcp_available_congestion_control",
  816. .maxlen = TCP_CA_BUF_MAX,
  817. .mode = 0444,
  818. .proc_handler = proc_tcp_available_congestion_control,
  819. },
  820. {
  821. .procname = "tcp_allowed_congestion_control",
  822. .maxlen = TCP_CA_BUF_MAX,
  823. .mode = 0644,
  824. .proc_handler = proc_allowed_congestion_control,
  825. },
  826. {
  827. .procname = "tcp_keepalive_time",
  828. .data = &init_net.ipv4.sysctl_tcp_keepalive_time,
  829. .maxlen = sizeof(int),
  830. .mode = 0644,
  831. .proc_handler = proc_dointvec_jiffies,
  832. },
  833. {
  834. .procname = "tcp_keepalive_probes",
  835. .data = &init_net.ipv4.sysctl_tcp_keepalive_probes,
  836. .maxlen = sizeof(int),
  837. .mode = 0644,
  838. .proc_handler = proc_dointvec
  839. },
  840. {
  841. .procname = "tcp_keepalive_intvl",
  842. .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl,
  843. .maxlen = sizeof(int),
  844. .mode = 0644,
  845. .proc_handler = proc_dointvec_jiffies,
  846. },
  847. {
  848. .procname = "tcp_syn_retries",
  849. .data = &init_net.ipv4.sysctl_tcp_syn_retries,
  850. .maxlen = sizeof(int),
  851. .mode = 0644,
  852. .proc_handler = proc_dointvec_minmax,
  853. .extra1 = &tcp_syn_retries_min,
  854. .extra2 = &tcp_syn_retries_max
  855. },
  856. {
  857. .procname = "tcp_synack_retries",
  858. .data = &init_net.ipv4.sysctl_tcp_synack_retries,
  859. .maxlen = sizeof(int),
  860. .mode = 0644,
  861. .proc_handler = proc_dointvec
  862. },
  863. #ifdef CONFIG_SYN_COOKIES
  864. {
  865. .procname = "tcp_syncookies",
  866. .data = &init_net.ipv4.sysctl_tcp_syncookies,
  867. .maxlen = sizeof(int),
  868. .mode = 0644,
  869. .proc_handler = proc_dointvec
  870. },
  871. #endif
  872. {
  873. .procname = "tcp_reordering",
  874. .data = &init_net.ipv4.sysctl_tcp_reordering,
  875. .maxlen = sizeof(int),
  876. .mode = 0644,
  877. .proc_handler = proc_dointvec
  878. },
  879. {
  880. .procname = "tcp_retries1",
  881. .data = &init_net.ipv4.sysctl_tcp_retries1,
  882. .maxlen = sizeof(int),
  883. .mode = 0644,
  884. .proc_handler = proc_dointvec_minmax,
  885. .extra2 = &tcp_retr1_max
  886. },
  887. {
  888. .procname = "tcp_retries2",
  889. .data = &init_net.ipv4.sysctl_tcp_retries2,
  890. .maxlen = sizeof(int),
  891. .mode = 0644,
  892. .proc_handler = proc_dointvec
  893. },
  894. {
  895. .procname = "tcp_orphan_retries",
  896. .data = &init_net.ipv4.sysctl_tcp_orphan_retries,
  897. .maxlen = sizeof(int),
  898. .mode = 0644,
  899. .proc_handler = proc_dointvec
  900. },
  901. {
  902. .procname = "tcp_fin_timeout",
  903. .data = &init_net.ipv4.sysctl_tcp_fin_timeout,
  904. .maxlen = sizeof(int),
  905. .mode = 0644,
  906. .proc_handler = proc_dointvec_jiffies,
  907. },
  908. {
  909. .procname = "tcp_notsent_lowat",
  910. .data = &init_net.ipv4.sysctl_tcp_notsent_lowat,
  911. .maxlen = sizeof(unsigned int),
  912. .mode = 0644,
  913. .proc_handler = proc_douintvec,
  914. },
  915. {
  916. .procname = "tcp_tw_reuse",
  917. .data = &init_net.ipv4.sysctl_tcp_tw_reuse,
  918. .maxlen = sizeof(int),
  919. .mode = 0644,
  920. .proc_handler = proc_dointvec_minmax,
  921. .extra1 = SYSCTL_ZERO,
  922. .extra2 = &two,
  923. },
  924. {
  925. .procname = "tcp_max_tw_buckets",
  926. .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets,
  927. .maxlen = sizeof(int),
  928. .mode = 0644,
  929. .proc_handler = proc_dointvec
  930. },
  931. {
  932. .procname = "tcp_max_syn_backlog",
  933. .data = &init_net.ipv4.sysctl_max_syn_backlog,
  934. .maxlen = sizeof(int),
  935. .mode = 0644,
  936. .proc_handler = proc_dointvec
  937. },
  938. {
  939. .procname = "tcp_fastopen",
  940. .data = &init_net.ipv4.sysctl_tcp_fastopen,
  941. .maxlen = sizeof(int),
  942. .mode = 0644,
  943. .proc_handler = proc_dointvec,
  944. },
  945. {
  946. .procname = "tcp_fastopen_key",
  947. .mode = 0600,
  948. .data = &init_net.ipv4.sysctl_tcp_fastopen,
  949. /* maxlen to print the list of keys in hex (*2), with dashes
  950. * separating doublewords and a comma in between keys.
  951. */
  952. .maxlen = ((TCP_FASTOPEN_KEY_LENGTH *
  953. 2 * TCP_FASTOPEN_KEY_MAX) +
  954. (TCP_FASTOPEN_KEY_MAX * 5)),
  955. .proc_handler = proc_tcp_fastopen_key,
  956. },
  957. {
  958. .procname = "tcp_fastopen_blackhole_timeout_sec",
  959. .data = &init_net.ipv4.sysctl_tcp_fastopen_blackhole_timeout,
  960. .maxlen = sizeof(int),
  961. .mode = 0644,
  962. .proc_handler = proc_tfo_blackhole_detect_timeout,
  963. .extra1 = SYSCTL_ZERO,
  964. },
  965. #ifdef CONFIG_IP_ROUTE_MULTIPATH
  966. {
  967. .procname = "fib_multipath_use_neigh",
  968. .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh,
  969. .maxlen = sizeof(int),
  970. .mode = 0644,
  971. .proc_handler = proc_dointvec_minmax,
  972. .extra1 = SYSCTL_ZERO,
  973. .extra2 = SYSCTL_ONE,
  974. },
  975. {
  976. .procname = "fib_multipath_hash_policy",
  977. .data = &init_net.ipv4.sysctl_fib_multipath_hash_policy,
  978. .maxlen = sizeof(int),
  979. .mode = 0644,
  980. .proc_handler = proc_fib_multipath_hash_policy,
  981. .extra1 = SYSCTL_ZERO,
  982. .extra2 = &two,
  983. },
  984. #endif
  985. {
  986. .procname = "ip_unprivileged_port_start",
  987. .maxlen = sizeof(int),
  988. .data = &init_net.ipv4.sysctl_ip_prot_sock,
  989. .mode = 0644,
  990. .proc_handler = ipv4_privileged_ports,
  991. },
  992. #ifdef CONFIG_NET_L3_MASTER_DEV
  993. {
  994. .procname = "udp_l3mdev_accept",
  995. .data = &init_net.ipv4.sysctl_udp_l3mdev_accept,
  996. .maxlen = sizeof(int),
  997. .mode = 0644,
  998. .proc_handler = proc_dointvec_minmax,
  999. .extra1 = SYSCTL_ZERO,
  1000. .extra2 = SYSCTL_ONE,
  1001. },
  1002. #endif
  1003. {
  1004. .procname = "tcp_sack",
  1005. .data = &init_net.ipv4.sysctl_tcp_sack,
  1006. .maxlen = sizeof(int),
  1007. .mode = 0644,
  1008. .proc_handler = proc_dointvec
  1009. },
  1010. {
  1011. .procname = "tcp_window_scaling",
  1012. .data = &init_net.ipv4.sysctl_tcp_window_scaling,
  1013. .maxlen = sizeof(int),
  1014. .mode = 0644,
  1015. .proc_handler = proc_dointvec
  1016. },
  1017. {
  1018. .procname = "tcp_timestamps",
  1019. .data = &init_net.ipv4.sysctl_tcp_timestamps,
  1020. .maxlen = sizeof(int),
  1021. .mode = 0644,
  1022. .proc_handler = proc_dointvec
  1023. },
  1024. {
  1025. .procname = "tcp_early_retrans",
  1026. .data = &init_net.ipv4.sysctl_tcp_early_retrans,
  1027. .maxlen = sizeof(int),
  1028. .mode = 0644,
  1029. .proc_handler = proc_dointvec_minmax,
  1030. .extra1 = SYSCTL_ZERO,
  1031. .extra2 = &four,
  1032. },
  1033. {
  1034. .procname = "tcp_recovery",
  1035. .data = &init_net.ipv4.sysctl_tcp_recovery,
  1036. .maxlen = sizeof(int),
  1037. .mode = 0644,
  1038. .proc_handler = proc_dointvec,
  1039. },
  1040. {
  1041. .procname = "tcp_thin_linear_timeouts",
  1042. .data = &init_net.ipv4.sysctl_tcp_thin_linear_timeouts,
  1043. .maxlen = sizeof(int),
  1044. .mode = 0644,
  1045. .proc_handler = proc_dointvec
  1046. },
  1047. {
  1048. .procname = "tcp_slow_start_after_idle",
  1049. .data = &init_net.ipv4.sysctl_tcp_slow_start_after_idle,
  1050. .maxlen = sizeof(int),
  1051. .mode = 0644,
  1052. .proc_handler = proc_dointvec
  1053. },
  1054. {
  1055. .procname = "tcp_retrans_collapse",
  1056. .data = &init_net.ipv4.sysctl_tcp_retrans_collapse,
  1057. .maxlen = sizeof(int),
  1058. .mode = 0644,
  1059. .proc_handler = proc_dointvec
  1060. },
  1061. {
  1062. .procname = "tcp_stdurg",
  1063. .data = &init_net.ipv4.sysctl_tcp_stdurg,
  1064. .maxlen = sizeof(int),
  1065. .mode = 0644,
  1066. .proc_handler = proc_dointvec
  1067. },
  1068. {
  1069. .procname = "tcp_rfc1337",
  1070. .data = &init_net.ipv4.sysctl_tcp_rfc1337,
  1071. .maxlen = sizeof(int),
  1072. .mode = 0644,
  1073. .proc_handler = proc_dointvec
  1074. },
  1075. {
  1076. .procname = "tcp_abort_on_overflow",
  1077. .data = &init_net.ipv4.sysctl_tcp_abort_on_overflow,
  1078. .maxlen = sizeof(int),
  1079. .mode = 0644,
  1080. .proc_handler = proc_dointvec
  1081. },
  1082. {
  1083. .procname = "tcp_fack",
  1084. .data = &init_net.ipv4.sysctl_tcp_fack,
  1085. .maxlen = sizeof(int),
  1086. .mode = 0644,
  1087. .proc_handler = proc_dointvec
  1088. },
  1089. {
  1090. .procname = "tcp_max_reordering",
  1091. .data = &init_net.ipv4.sysctl_tcp_max_reordering,
  1092. .maxlen = sizeof(int),
  1093. .mode = 0644,
  1094. .proc_handler = proc_dointvec
  1095. },
  1096. {
  1097. .procname = "tcp_dsack",
  1098. .data = &init_net.ipv4.sysctl_tcp_dsack,
  1099. .maxlen = sizeof(int),
  1100. .mode = 0644,
  1101. .proc_handler = proc_dointvec
  1102. },
  1103. {
  1104. .procname = "tcp_app_win",
  1105. .data = &init_net.ipv4.sysctl_tcp_app_win,
  1106. .maxlen = sizeof(int),
  1107. .mode = 0644,
  1108. .proc_handler = proc_dointvec
  1109. },
  1110. {
  1111. .procname = "tcp_adv_win_scale",
  1112. .data = &init_net.ipv4.sysctl_tcp_adv_win_scale,
  1113. .maxlen = sizeof(int),
  1114. .mode = 0644,
  1115. .proc_handler = proc_dointvec_minmax,
  1116. .extra1 = &tcp_adv_win_scale_min,
  1117. .extra2 = &tcp_adv_win_scale_max,
  1118. },
  1119. {
  1120. .procname = "tcp_frto",
  1121. .data = &init_net.ipv4.sysctl_tcp_frto,
  1122. .maxlen = sizeof(int),
  1123. .mode = 0644,
  1124. .proc_handler = proc_dointvec
  1125. },
  1126. {
  1127. .procname = "tcp_no_metrics_save",
  1128. .data = &init_net.ipv4.sysctl_tcp_nometrics_save,
  1129. .maxlen = sizeof(int),
  1130. .mode = 0644,
  1131. .proc_handler = proc_dointvec,
  1132. },
  1133. {
  1134. .procname = "tcp_no_ssthresh_metrics_save",
  1135. .data = &init_net.ipv4.sysctl_tcp_no_ssthresh_metrics_save,
  1136. .maxlen = sizeof(int),
  1137. .mode = 0644,
  1138. .proc_handler = proc_dointvec_minmax,
  1139. .extra1 = SYSCTL_ZERO,
  1140. .extra2 = SYSCTL_ONE,
  1141. },
  1142. {
  1143. .procname = "tcp_moderate_rcvbuf",
  1144. .data = &init_net.ipv4.sysctl_tcp_moderate_rcvbuf,
  1145. .maxlen = sizeof(int),
  1146. .mode = 0644,
  1147. .proc_handler = proc_dointvec,
  1148. },
  1149. {
  1150. .procname = "tcp_tso_win_divisor",
  1151. .data = &init_net.ipv4.sysctl_tcp_tso_win_divisor,
  1152. .maxlen = sizeof(int),
  1153. .mode = 0644,
  1154. .proc_handler = proc_dointvec,
  1155. },
  1156. {
  1157. .procname = "tcp_workaround_signed_windows",
  1158. .data = &init_net.ipv4.sysctl_tcp_workaround_signed_windows,
  1159. .maxlen = sizeof(int),
  1160. .mode = 0644,
  1161. .proc_handler = proc_dointvec
  1162. },
  1163. {
  1164. .procname = "tcp_limit_output_bytes",
  1165. .data = &init_net.ipv4.sysctl_tcp_limit_output_bytes,
  1166. .maxlen = sizeof(int),
  1167. .mode = 0644,
  1168. .proc_handler = proc_dointvec
  1169. },
  1170. {
  1171. .procname = "tcp_challenge_ack_limit",
  1172. .data = &init_net.ipv4.sysctl_tcp_challenge_ack_limit,
  1173. .maxlen = sizeof(int),
  1174. .mode = 0644,
  1175. .proc_handler = proc_dointvec
  1176. },
  1177. {
  1178. .procname = "tcp_min_tso_segs",
  1179. .data = &init_net.ipv4.sysctl_tcp_min_tso_segs,
  1180. .maxlen = sizeof(int),
  1181. .mode = 0644,
  1182. .proc_handler = proc_dointvec_minmax,
  1183. .extra1 = SYSCTL_ONE,
  1184. .extra2 = &gso_max_segs,
  1185. },
  1186. {
  1187. .procname = "tcp_min_rtt_wlen",
  1188. .data = &init_net.ipv4.sysctl_tcp_min_rtt_wlen,
  1189. .maxlen = sizeof(int),
  1190. .mode = 0644,
  1191. .proc_handler = proc_dointvec_minmax,
  1192. .extra1 = SYSCTL_ZERO,
  1193. .extra2 = &one_day_secs
  1194. },
  1195. {
  1196. .procname = "tcp_autocorking",
  1197. .data = &init_net.ipv4.sysctl_tcp_autocorking,
  1198. .maxlen = sizeof(int),
  1199. .mode = 0644,
  1200. .proc_handler = proc_dointvec_minmax,
  1201. .extra1 = SYSCTL_ZERO,
  1202. .extra2 = SYSCTL_ONE,
  1203. },
  1204. {
  1205. .procname = "tcp_invalid_ratelimit",
  1206. .data = &init_net.ipv4.sysctl_tcp_invalid_ratelimit,
  1207. .maxlen = sizeof(int),
  1208. .mode = 0644,
  1209. .proc_handler = proc_dointvec_ms_jiffies,
  1210. },
  1211. {
  1212. .procname = "tcp_pacing_ss_ratio",
  1213. .data = &init_net.ipv4.sysctl_tcp_pacing_ss_ratio,
  1214. .maxlen = sizeof(int),
  1215. .mode = 0644,
  1216. .proc_handler = proc_dointvec_minmax,
  1217. .extra1 = SYSCTL_ZERO,
  1218. .extra2 = &thousand,
  1219. },
  1220. {
  1221. .procname = "tcp_pacing_ca_ratio",
  1222. .data = &init_net.ipv4.sysctl_tcp_pacing_ca_ratio,
  1223. .maxlen = sizeof(int),
  1224. .mode = 0644,
  1225. .proc_handler = proc_dointvec_minmax,
  1226. .extra1 = SYSCTL_ZERO,
  1227. .extra2 = &thousand,
  1228. },
  1229. {
  1230. .procname = "tcp_wmem",
  1231. .data = &init_net.ipv4.sysctl_tcp_wmem,
  1232. .maxlen = sizeof(init_net.ipv4.sysctl_tcp_wmem),
  1233. .mode = 0644,
  1234. .proc_handler = proc_dointvec_minmax,
  1235. .extra1 = SYSCTL_ONE,
  1236. },
  1237. {
  1238. .procname = "tcp_rmem",
  1239. .data = &init_net.ipv4.sysctl_tcp_rmem,
  1240. .maxlen = sizeof(init_net.ipv4.sysctl_tcp_rmem),
  1241. .mode = 0644,
  1242. .proc_handler = proc_dointvec_minmax,
  1243. .extra1 = SYSCTL_ONE,
  1244. },
  1245. {
  1246. .procname = "tcp_comp_sack_delay_ns",
  1247. .data = &init_net.ipv4.sysctl_tcp_comp_sack_delay_ns,
  1248. .maxlen = sizeof(unsigned long),
  1249. .mode = 0644,
  1250. .proc_handler = proc_doulongvec_minmax,
  1251. },
  1252. {
  1253. .procname = "tcp_comp_sack_slack_ns",
  1254. .data = &init_net.ipv4.sysctl_tcp_comp_sack_slack_ns,
  1255. .maxlen = sizeof(unsigned long),
  1256. .mode = 0644,
  1257. .proc_handler = proc_doulongvec_minmax,
  1258. },
  1259. {
  1260. .procname = "tcp_comp_sack_nr",
  1261. .data = &init_net.ipv4.sysctl_tcp_comp_sack_nr,
  1262. .maxlen = sizeof(int),
  1263. .mode = 0644,
  1264. .proc_handler = proc_dointvec_minmax,
  1265. .extra1 = SYSCTL_ZERO,
  1266. .extra2 = &comp_sack_nr_max,
  1267. },
  1268. {
  1269. .procname = "tcp_reflect_tos",
  1270. .data = &init_net.ipv4.sysctl_tcp_reflect_tos,
  1271. .maxlen = sizeof(int),
  1272. .mode = 0644,
  1273. .proc_handler = proc_dointvec_minmax,
  1274. .extra1 = SYSCTL_ZERO,
  1275. .extra2 = SYSCTL_ONE,
  1276. },
  1277. {
  1278. .procname = "udp_rmem_min",
  1279. .data = &init_net.ipv4.sysctl_udp_rmem_min,
  1280. .maxlen = sizeof(init_net.ipv4.sysctl_udp_rmem_min),
  1281. .mode = 0644,
  1282. .proc_handler = proc_dointvec_minmax,
  1283. .extra1 = SYSCTL_ONE
  1284. },
  1285. {
  1286. .procname = "udp_wmem_min",
  1287. .data = &init_net.ipv4.sysctl_udp_wmem_min,
  1288. .maxlen = sizeof(init_net.ipv4.sysctl_udp_wmem_min),
  1289. .mode = 0644,
  1290. .proc_handler = proc_dointvec_minmax,
  1291. .extra1 = SYSCTL_ONE
  1292. },
  1293. { }
  1294. };
  1295. static __net_init int ipv4_sysctl_init_net(struct net *net)
  1296. {
  1297. struct ctl_table *table;
  1298. table = ipv4_net_table;
  1299. if (!net_eq(net, &init_net)) {
  1300. int i;
  1301. table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
  1302. if (!table)
  1303. goto err_alloc;
  1304. for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) {
  1305. if (table[i].data) {
  1306. /* Update the variables to point into
  1307. * the current struct net
  1308. */
  1309. table[i].data += (void *)net - (void *)&init_net;
  1310. } else {
  1311. /* Entries without data pointer are global;
  1312. * Make them read-only in non-init_net ns
  1313. */
  1314. table[i].mode &= ~0222;
  1315. }
  1316. }
  1317. }
  1318. net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table);
  1319. if (!net->ipv4.ipv4_hdr)
  1320. goto err_reg;
  1321. net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
  1322. if (!net->ipv4.sysctl_local_reserved_ports)
  1323. goto err_reserved_ports;
  1324. net->ipv4.sysctl_local_unbindable_ports = kzalloc(65536 / 8, GFP_KERNEL);
  1325. if (!net->ipv4.sysctl_local_unbindable_ports)
  1326. goto err_unbindable_ports;
  1327. return 0;
  1328. err_unbindable_ports:
  1329. kfree(net->ipv4.sysctl_local_reserved_ports);
  1330. err_reserved_ports:
  1331. unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
  1332. err_reg:
  1333. if (!net_eq(net, &init_net))
  1334. kfree(table);
  1335. err_alloc:
  1336. return -ENOMEM;
  1337. }
  1338. static __net_exit void ipv4_sysctl_exit_net(struct net *net)
  1339. {
  1340. struct ctl_table *table;
  1341. kfree(net->ipv4.sysctl_local_unbindable_ports);
  1342. kfree(net->ipv4.sysctl_local_reserved_ports);
  1343. table = net->ipv4.ipv4_hdr->ctl_table_arg;
  1344. unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
  1345. kfree(table);
  1346. }
  1347. static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
  1348. .init = ipv4_sysctl_init_net,
  1349. .exit = ipv4_sysctl_exit_net,
  1350. };
  1351. static __init int sysctl_ipv4_init(void)
  1352. {
  1353. struct ctl_table_header *hdr;
  1354. hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table);
  1355. if (!hdr)
  1356. return -ENOMEM;
  1357. if (register_pernet_subsys(&ipv4_sysctl_ops)) {
  1358. unregister_net_sysctl_table(hdr);
  1359. return -ENOMEM;
  1360. }
  1361. return 0;
  1362. }
  1363. __initcall(sysctl_ipv4_init);