1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem. |
4 | * |
5 | * Begun April 1, 1996, Mike Shaver. |
6 | * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS] |
7 | */ |
8 | |
9 | #include <linux/sysctl.h> |
10 | #include <linux/seqlock.h> |
11 | #include <linux/init.h> |
12 | #include <linux/slab.h> |
13 | #include <net/icmp.h> |
14 | #include <net/ip.h> |
15 | #include <net/ip_fib.h> |
16 | #include <net/tcp.h> |
17 | #include <net/udp.h> |
18 | #include <net/cipso_ipv4.h> |
19 | #include <net/ping.h> |
20 | #include <net/protocol.h> |
21 | #include <net/netevent.h> |
22 | |
23 | static int tcp_retr1_max = 255; |
24 | static int ip_local_port_range_min[] = { 1, 1 }; |
25 | static int ip_local_port_range_max[] = { 65535, 65535 }; |
26 | static int tcp_adv_win_scale_min = -31; |
27 | static int tcp_adv_win_scale_max = 31; |
28 | static int tcp_app_win_max = 31; |
29 | static int tcp_min_snd_mss_min = TCP_MIN_SND_MSS; |
30 | static int tcp_min_snd_mss_max = 65535; |
31 | static int ip_privileged_port_min; |
32 | static int ip_privileged_port_max = 65535; |
33 | static int ip_ttl_min = 1; |
34 | static int ip_ttl_max = 255; |
35 | static int tcp_syn_retries_min = 1; |
36 | static int tcp_syn_retries_max = MAX_TCP_SYNCNT; |
37 | static int tcp_syn_linear_timeouts_max = MAX_TCP_SYNCNT; |
38 | static unsigned long ip_ping_group_range_min[] = { 0, 0 }; |
39 | static unsigned long ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; |
40 | static u32 u32_max_div_HZ = UINT_MAX / HZ; |
41 | static int one_day_secs = 24 * 3600; |
42 | static u32 fib_multipath_hash_fields_all_mask __maybe_unused = |
43 | FIB_MULTIPATH_HASH_FIELD_ALL_MASK; |
44 | static unsigned int tcp_child_ehash_entries_max = 16 * 1024 * 1024; |
45 | static unsigned int udp_child_hash_entries_max = UDP_HTABLE_SIZE_MAX; |
46 | static int tcp_plb_max_rounds = 31; |
47 | static int tcp_plb_max_cong_thresh = 256; |
48 | |
49 | /* obsolete */ |
50 | static int sysctl_tcp_low_latency __read_mostly; |
51 | |
52 | /* Update system visible IP port range */ |
53 | static void set_local_port_range(struct net *net, unsigned int low, unsigned int high) |
54 | { |
55 | bool same_parity = !((low ^ high) & 1); |
56 | |
57 | if (same_parity && !net->ipv4.ip_local_ports.warned) { |
58 | net->ipv4.ip_local_ports.warned = true; |
59 | pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n" ); |
60 | } |
61 | WRITE_ONCE(net->ipv4.ip_local_ports.range, high << 16 | low); |
62 | } |
63 | |
64 | /* Validate changes from /proc interface. */ |
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 = table->data; |
69 | int ret; |
70 | int range[2]; |
71 | struct ctl_table tmp = { |
72 | .data = &range, |
73 | .maxlen = sizeof(range), |
74 | .mode = table->mode, |
75 | .extra1 = &ip_local_port_range_min, |
76 | .extra2 = &ip_local_port_range_max, |
77 | }; |
78 | |
79 | inet_get_local_port_range(net, low: &range[0], high: &range[1]); |
80 | |
81 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
82 | |
83 | if (write && ret == 0) { |
84 | /* Ensure that the upper limit is not smaller than the lower, |
85 | * and that the lower does not encroach upon the privileged |
86 | * port limit. |
87 | */ |
88 | if ((range[1] < range[0]) || |
89 | (range[0] < READ_ONCE(net->ipv4.sysctl_ip_prot_sock))) |
90 | ret = -EINVAL; |
91 | else |
92 | set_local_port_range(net, low: range[0], high: range[1]); |
93 | } |
94 | |
95 | return ret; |
96 | } |
97 | |
98 | /* Validate changes from /proc interface. */ |
99 | static int ipv4_privileged_ports(struct ctl_table *table, int write, |
100 | void *buffer, size_t *lenp, loff_t *ppos) |
101 | { |
102 | struct net *net = container_of(table->data, struct net, |
103 | ipv4.sysctl_ip_prot_sock); |
104 | int ret; |
105 | int pports; |
106 | int range[2]; |
107 | struct ctl_table tmp = { |
108 | .data = &pports, |
109 | .maxlen = sizeof(pports), |
110 | .mode = table->mode, |
111 | .extra1 = &ip_privileged_port_min, |
112 | .extra2 = &ip_privileged_port_max, |
113 | }; |
114 | |
115 | pports = READ_ONCE(net->ipv4.sysctl_ip_prot_sock); |
116 | |
117 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
118 | |
119 | if (write && ret == 0) { |
120 | inet_get_local_port_range(net, low: &range[0], high: &range[1]); |
121 | /* Ensure that the local port range doesn't overlap with the |
122 | * privileged port range. |
123 | */ |
124 | if (range[0] < pports) |
125 | ret = -EINVAL; |
126 | else |
127 | WRITE_ONCE(net->ipv4.sysctl_ip_prot_sock, pports); |
128 | } |
129 | |
130 | return ret; |
131 | } |
132 | |
133 | static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high) |
134 | { |
135 | kgid_t *data = table->data; |
136 | struct net *net = |
137 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
138 | unsigned int seq; |
139 | do { |
140 | seq = read_seqbegin(sl: &net->ipv4.ping_group_range.lock); |
141 | |
142 | *low = data[0]; |
143 | *high = data[1]; |
144 | } while (read_seqretry(sl: &net->ipv4.ping_group_range.lock, start: seq)); |
145 | } |
146 | |
147 | /* Update system visible IP port range */ |
148 | static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high) |
149 | { |
150 | kgid_t *data = table->data; |
151 | struct net *net = |
152 | container_of(table->data, struct net, ipv4.ping_group_range.range); |
153 | write_seqlock(sl: &net->ipv4.ping_group_range.lock); |
154 | data[0] = low; |
155 | data[1] = high; |
156 | write_sequnlock(sl: &net->ipv4.ping_group_range.lock); |
157 | } |
158 | |
159 | /* Validate changes from /proc interface. */ |
160 | static int ipv4_ping_group_range(struct ctl_table *table, int write, |
161 | void *buffer, size_t *lenp, loff_t *ppos) |
162 | { |
163 | struct user_namespace *user_ns = current_user_ns(); |
164 | int ret; |
165 | unsigned long urange[2]; |
166 | kgid_t low, high; |
167 | struct ctl_table tmp = { |
168 | .data = &urange, |
169 | .maxlen = sizeof(urange), |
170 | .mode = table->mode, |
171 | .extra1 = &ip_ping_group_range_min, |
172 | .extra2 = &ip_ping_group_range_max, |
173 | }; |
174 | |
175 | inet_get_ping_group_range_table(table, low: &low, high: &high); |
176 | urange[0] = from_kgid_munged(to: user_ns, gid: low); |
177 | urange[1] = from_kgid_munged(to: user_ns, gid: high); |
178 | ret = proc_doulongvec_minmax(&tmp, write, buffer, lenp, ppos); |
179 | |
180 | if (write && ret == 0) { |
181 | low = make_kgid(from: user_ns, gid: urange[0]); |
182 | high = make_kgid(from: user_ns, gid: urange[1]); |
183 | if (!gid_valid(gid: low) || !gid_valid(gid: high)) |
184 | return -EINVAL; |
185 | if (urange[1] < urange[0] || gid_lt(left: high, right: low)) { |
186 | low = make_kgid(from: &init_user_ns, gid: 1); |
187 | high = make_kgid(from: &init_user_ns, gid: 0); |
188 | } |
189 | set_ping_group_range(table, low, high); |
190 | } |
191 | |
192 | return ret; |
193 | } |
194 | |
195 | static int ipv4_fwd_update_priority(struct ctl_table *table, int write, |
196 | void *buffer, size_t *lenp, loff_t *ppos) |
197 | { |
198 | struct net *net; |
199 | int ret; |
200 | |
201 | net = container_of(table->data, struct net, |
202 | ipv4.sysctl_ip_fwd_update_priority); |
203 | ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos); |
204 | if (write && ret == 0) |
205 | call_netevent_notifiers(val: NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE, |
206 | v: net); |
207 | |
208 | return ret; |
209 | } |
210 | |
211 | static int proc_tcp_congestion_control(struct ctl_table *ctl, int write, |
212 | void *buffer, size_t *lenp, loff_t *ppos) |
213 | { |
214 | struct net *net = container_of(ctl->data, struct net, |
215 | ipv4.tcp_congestion_control); |
216 | char val[TCP_CA_NAME_MAX]; |
217 | struct ctl_table tbl = { |
218 | .data = val, |
219 | .maxlen = TCP_CA_NAME_MAX, |
220 | }; |
221 | int ret; |
222 | |
223 | tcp_get_default_congestion_control(net, name: val); |
224 | |
225 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
226 | if (write && ret == 0) |
227 | ret = tcp_set_default_congestion_control(net, name: val); |
228 | return ret; |
229 | } |
230 | |
231 | static int proc_tcp_available_congestion_control(struct ctl_table *ctl, |
232 | int write, void *buffer, |
233 | size_t *lenp, loff_t *ppos) |
234 | { |
235 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; |
236 | int ret; |
237 | |
238 | tbl.data = kmalloc(size: tbl.maxlen, GFP_USER); |
239 | if (!tbl.data) |
240 | return -ENOMEM; |
241 | tcp_get_available_congestion_control(buf: tbl.data, TCP_CA_BUF_MAX); |
242 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
243 | kfree(objp: tbl.data); |
244 | return ret; |
245 | } |
246 | |
247 | static int proc_allowed_congestion_control(struct ctl_table *ctl, |
248 | int write, void *buffer, |
249 | size_t *lenp, loff_t *ppos) |
250 | { |
251 | struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; |
252 | int ret; |
253 | |
254 | tbl.data = kmalloc(size: tbl.maxlen, GFP_USER); |
255 | if (!tbl.data) |
256 | return -ENOMEM; |
257 | |
258 | tcp_get_allowed_congestion_control(buf: tbl.data, len: tbl.maxlen); |
259 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
260 | if (write && ret == 0) |
261 | ret = tcp_set_allowed_congestion_control(allowed: tbl.data); |
262 | kfree(objp: tbl.data); |
263 | return ret; |
264 | } |
265 | |
266 | static int sscanf_key(char *buf, __le32 *key) |
267 | { |
268 | u32 user_key[4]; |
269 | int i, ret = 0; |
270 | |
271 | if (sscanf(buf, "%x-%x-%x-%x" , user_key, user_key + 1, |
272 | user_key + 2, user_key + 3) != 4) { |
273 | ret = -EINVAL; |
274 | } else { |
275 | for (i = 0; i < ARRAY_SIZE(user_key); i++) |
276 | key[i] = cpu_to_le32(user_key[i]); |
277 | } |
278 | pr_debug("proc TFO key set 0x%x-%x-%x-%x <- 0x%s: %u\n" , |
279 | user_key[0], user_key[1], user_key[2], user_key[3], buf, ret); |
280 | |
281 | return ret; |
282 | } |
283 | |
284 | static int proc_tcp_fastopen_key(struct ctl_table *table, int write, |
285 | void *buffer, size_t *lenp, loff_t *ppos) |
286 | { |
287 | struct net *net = container_of(table->data, struct net, |
288 | ipv4.sysctl_tcp_fastopen); |
289 | /* maxlen to print the list of keys in hex (*2), with dashes |
290 | * separating doublewords and a comma in between keys. |
291 | */ |
292 | struct ctl_table tbl = { .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * |
293 | 2 * TCP_FASTOPEN_KEY_MAX) + |
294 | (TCP_FASTOPEN_KEY_MAX * 5)) }; |
295 | u32 user_key[TCP_FASTOPEN_KEY_BUF_LENGTH / sizeof(u32)]; |
296 | __le32 key[TCP_FASTOPEN_KEY_BUF_LENGTH / sizeof(__le32)]; |
297 | char *backup_data; |
298 | int ret, i = 0, off = 0, n_keys; |
299 | |
300 | tbl.data = kmalloc(size: tbl.maxlen, GFP_KERNEL); |
301 | if (!tbl.data) |
302 | return -ENOMEM; |
303 | |
304 | n_keys = tcp_fastopen_get_cipher(net, NULL, key: (u64 *)key); |
305 | if (!n_keys) { |
306 | memset(&key[0], 0, TCP_FASTOPEN_KEY_LENGTH); |
307 | n_keys = 1; |
308 | } |
309 | |
310 | for (i = 0; i < n_keys * 4; i++) |
311 | user_key[i] = le32_to_cpu(key[i]); |
312 | |
313 | for (i = 0; i < n_keys; i++) { |
314 | off += snprintf(buf: tbl.data + off, size: tbl.maxlen - off, |
315 | fmt: "%08x-%08x-%08x-%08x" , |
316 | user_key[i * 4], |
317 | user_key[i * 4 + 1], |
318 | user_key[i * 4 + 2], |
319 | user_key[i * 4 + 3]); |
320 | |
321 | if (WARN_ON_ONCE(off >= tbl.maxlen - 1)) |
322 | break; |
323 | |
324 | if (i + 1 < n_keys) |
325 | off += snprintf(buf: tbl.data + off, size: tbl.maxlen - off, fmt: "," ); |
326 | } |
327 | |
328 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
329 | |
330 | if (write && ret == 0) { |
331 | backup_data = strchr(tbl.data, ','); |
332 | if (backup_data) { |
333 | *backup_data = '\0'; |
334 | backup_data++; |
335 | } |
336 | if (sscanf_key(buf: tbl.data, key)) { |
337 | ret = -EINVAL; |
338 | goto bad_key; |
339 | } |
340 | if (backup_data) { |
341 | if (sscanf_key(buf: backup_data, key: key + 4)) { |
342 | ret = -EINVAL; |
343 | goto bad_key; |
344 | } |
345 | } |
346 | tcp_fastopen_reset_cipher(net, NULL, primary_key: key, |
347 | backup_key: backup_data ? key + 4 : NULL); |
348 | } |
349 | |
350 | bad_key: |
351 | kfree(objp: tbl.data); |
352 | return ret; |
353 | } |
354 | |
355 | static int proc_tfo_blackhole_detect_timeout(struct ctl_table *table, |
356 | int write, void *buffer, |
357 | size_t *lenp, loff_t *ppos) |
358 | { |
359 | struct net *net = container_of(table->data, struct net, |
360 | ipv4.sysctl_tcp_fastopen_blackhole_timeout); |
361 | int ret; |
362 | |
363 | ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); |
364 | if (write && ret == 0) |
365 | atomic_set(v: &net->ipv4.tfo_active_disable_times, i: 0); |
366 | |
367 | return ret; |
368 | } |
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 | |
377 | tbl.data = kmalloc(size: tbl.maxlen, GFP_USER); |
378 | if (!tbl.data) |
379 | return -ENOMEM; |
380 | tcp_get_available_ulp(buf: tbl.data, TCP_ULP_BUF_MAX); |
381 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); |
382 | kfree(objp: tbl.data); |
383 | |
384 | return ret; |
385 | } |
386 | |
387 | static int proc_tcp_ehash_entries(struct ctl_table *table, int write, |
388 | void *buffer, size_t *lenp, loff_t *ppos) |
389 | { |
390 | struct net *net = container_of(table->data, struct net, |
391 | ipv4.sysctl_tcp_child_ehash_entries); |
392 | struct inet_hashinfo *hinfo = net->ipv4.tcp_death_row.hashinfo; |
393 | int tcp_ehash_entries; |
394 | struct ctl_table tbl; |
395 | |
396 | tcp_ehash_entries = hinfo->ehash_mask + 1; |
397 | |
398 | /* A negative number indicates that the child netns |
399 | * shares the global ehash. |
400 | */ |
401 | if (!net_eq(net1: net, net2: &init_net) && !hinfo->pernet) |
402 | tcp_ehash_entries *= -1; |
403 | |
404 | memset(&tbl, 0, sizeof(tbl)); |
405 | tbl.data = &tcp_ehash_entries; |
406 | tbl.maxlen = sizeof(int); |
407 | |
408 | return proc_dointvec(&tbl, write, buffer, lenp, ppos); |
409 | } |
410 | |
411 | static int proc_udp_hash_entries(struct ctl_table *table, int write, |
412 | void *buffer, size_t *lenp, loff_t *ppos) |
413 | { |
414 | struct net *net = container_of(table->data, struct net, |
415 | ipv4.sysctl_udp_child_hash_entries); |
416 | int udp_hash_entries; |
417 | struct ctl_table tbl; |
418 | |
419 | udp_hash_entries = net->ipv4.udp_table->mask + 1; |
420 | |
421 | /* A negative number indicates that the child netns |
422 | * shares the global udp_table. |
423 | */ |
424 | if (!net_eq(net1: net, net2: &init_net) && net->ipv4.udp_table == &udp_table) |
425 | udp_hash_entries *= -1; |
426 | |
427 | memset(&tbl, 0, sizeof(tbl)); |
428 | tbl.data = &udp_hash_entries; |
429 | tbl.maxlen = sizeof(int); |
430 | |
431 | return proc_dointvec(&tbl, write, buffer, lenp, ppos); |
432 | } |
433 | |
434 | #ifdef CONFIG_IP_ROUTE_MULTIPATH |
435 | static int proc_fib_multipath_hash_policy(struct ctl_table *table, int write, |
436 | void *buffer, size_t *lenp, |
437 | loff_t *ppos) |
438 | { |
439 | struct net *net = container_of(table->data, struct net, |
440 | ipv4.sysctl_fib_multipath_hash_policy); |
441 | int ret; |
442 | |
443 | ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos); |
444 | if (write && ret == 0) |
445 | call_netevent_notifiers(val: NETEVENT_IPV4_MPATH_HASH_UPDATE, v: net); |
446 | |
447 | return ret; |
448 | } |
449 | |
450 | static int proc_fib_multipath_hash_fields(struct ctl_table *table, int write, |
451 | void *buffer, size_t *lenp, |
452 | loff_t *ppos) |
453 | { |
454 | struct net *net; |
455 | int ret; |
456 | |
457 | net = container_of(table->data, struct net, |
458 | ipv4.sysctl_fib_multipath_hash_fields); |
459 | ret = proc_douintvec_minmax(table, write, buffer, lenp, ppos); |
460 | if (write && ret == 0) |
461 | call_netevent_notifiers(val: NETEVENT_IPV4_MPATH_HASH_UPDATE, v: net); |
462 | |
463 | return ret; |
464 | } |
465 | #endif |
466 | |
467 | static struct ctl_table ipv4_table[] = { |
468 | { |
469 | .procname = "tcp_max_orphans" , |
470 | .data = &sysctl_tcp_max_orphans, |
471 | .maxlen = sizeof(int), |
472 | .mode = 0644, |
473 | .proc_handler = proc_dointvec |
474 | }, |
475 | { |
476 | .procname = "inet_peer_threshold" , |
477 | .data = &inet_peer_threshold, |
478 | .maxlen = sizeof(int), |
479 | .mode = 0644, |
480 | .proc_handler = proc_dointvec |
481 | }, |
482 | { |
483 | .procname = "inet_peer_minttl" , |
484 | .data = &inet_peer_minttl, |
485 | .maxlen = sizeof(int), |
486 | .mode = 0644, |
487 | .proc_handler = proc_dointvec_jiffies, |
488 | }, |
489 | { |
490 | .procname = "inet_peer_maxttl" , |
491 | .data = &inet_peer_maxttl, |
492 | .maxlen = sizeof(int), |
493 | .mode = 0644, |
494 | .proc_handler = proc_dointvec_jiffies, |
495 | }, |
496 | { |
497 | .procname = "tcp_mem" , |
498 | .maxlen = sizeof(sysctl_tcp_mem), |
499 | .data = &sysctl_tcp_mem, |
500 | .mode = 0644, |
501 | .proc_handler = proc_doulongvec_minmax, |
502 | }, |
503 | { |
504 | .procname = "tcp_low_latency" , |
505 | .data = &sysctl_tcp_low_latency, |
506 | .maxlen = sizeof(int), |
507 | .mode = 0644, |
508 | .proc_handler = proc_dointvec |
509 | }, |
510 | #ifdef CONFIG_NETLABEL |
511 | { |
512 | .procname = "cipso_cache_enable" , |
513 | .data = &cipso_v4_cache_enabled, |
514 | .maxlen = sizeof(int), |
515 | .mode = 0644, |
516 | .proc_handler = proc_dointvec, |
517 | }, |
518 | { |
519 | .procname = "cipso_cache_bucket_size" , |
520 | .data = &cipso_v4_cache_bucketsize, |
521 | .maxlen = sizeof(int), |
522 | .mode = 0644, |
523 | .proc_handler = proc_dointvec, |
524 | }, |
525 | { |
526 | .procname = "cipso_rbm_optfmt" , |
527 | .data = &cipso_v4_rbm_optfmt, |
528 | .maxlen = sizeof(int), |
529 | .mode = 0644, |
530 | .proc_handler = proc_dointvec, |
531 | }, |
532 | { |
533 | .procname = "cipso_rbm_strictvalid" , |
534 | .data = &cipso_v4_rbm_strictvalid, |
535 | .maxlen = sizeof(int), |
536 | .mode = 0644, |
537 | .proc_handler = proc_dointvec, |
538 | }, |
539 | #endif /* CONFIG_NETLABEL */ |
540 | { |
541 | .procname = "tcp_available_ulp" , |
542 | .maxlen = TCP_ULP_BUF_MAX, |
543 | .mode = 0444, |
544 | .proc_handler = proc_tcp_available_ulp, |
545 | }, |
546 | { |
547 | .procname = "icmp_msgs_per_sec" , |
548 | .data = &sysctl_icmp_msgs_per_sec, |
549 | .maxlen = sizeof(int), |
550 | .mode = 0644, |
551 | .proc_handler = proc_dointvec_minmax, |
552 | .extra1 = SYSCTL_ZERO, |
553 | }, |
554 | { |
555 | .procname = "icmp_msgs_burst" , |
556 | .data = &sysctl_icmp_msgs_burst, |
557 | .maxlen = sizeof(int), |
558 | .mode = 0644, |
559 | .proc_handler = proc_dointvec_minmax, |
560 | .extra1 = SYSCTL_ZERO, |
561 | }, |
562 | { |
563 | .procname = "udp_mem" , |
564 | .data = &sysctl_udp_mem, |
565 | .maxlen = sizeof(sysctl_udp_mem), |
566 | .mode = 0644, |
567 | .proc_handler = proc_doulongvec_minmax, |
568 | }, |
569 | { |
570 | .procname = "fib_sync_mem" , |
571 | .data = &sysctl_fib_sync_mem, |
572 | .maxlen = sizeof(sysctl_fib_sync_mem), |
573 | .mode = 0644, |
574 | .proc_handler = proc_douintvec_minmax, |
575 | .extra1 = &sysctl_fib_sync_mem_min, |
576 | .extra2 = &sysctl_fib_sync_mem_max, |
577 | }, |
578 | { } |
579 | }; |
580 | |
581 | static struct ctl_table ipv4_net_table[] = { |
582 | { |
583 | .procname = "tcp_max_tw_buckets" , |
584 | .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets, |
585 | .maxlen = sizeof(int), |
586 | .mode = 0644, |
587 | .proc_handler = proc_dointvec |
588 | }, |
589 | { |
590 | .procname = "icmp_echo_ignore_all" , |
591 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, |
592 | .maxlen = sizeof(u8), |
593 | .mode = 0644, |
594 | .proc_handler = proc_dou8vec_minmax, |
595 | .extra1 = SYSCTL_ZERO, |
596 | .extra2 = SYSCTL_ONE |
597 | }, |
598 | { |
599 | .procname = "icmp_echo_enable_probe" , |
600 | .data = &init_net.ipv4.sysctl_icmp_echo_enable_probe, |
601 | .maxlen = sizeof(u8), |
602 | .mode = 0644, |
603 | .proc_handler = proc_dou8vec_minmax, |
604 | .extra1 = SYSCTL_ZERO, |
605 | .extra2 = SYSCTL_ONE |
606 | }, |
607 | { |
608 | .procname = "icmp_echo_ignore_broadcasts" , |
609 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, |
610 | .maxlen = sizeof(u8), |
611 | .mode = 0644, |
612 | .proc_handler = proc_dou8vec_minmax, |
613 | .extra1 = SYSCTL_ZERO, |
614 | .extra2 = SYSCTL_ONE |
615 | }, |
616 | { |
617 | .procname = "icmp_ignore_bogus_error_responses" , |
618 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, |
619 | .maxlen = sizeof(u8), |
620 | .mode = 0644, |
621 | .proc_handler = proc_dou8vec_minmax, |
622 | .extra1 = SYSCTL_ZERO, |
623 | .extra2 = SYSCTL_ONE |
624 | }, |
625 | { |
626 | .procname = "icmp_errors_use_inbound_ifaddr" , |
627 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, |
628 | .maxlen = sizeof(u8), |
629 | .mode = 0644, |
630 | .proc_handler = proc_dou8vec_minmax, |
631 | .extra1 = SYSCTL_ZERO, |
632 | .extra2 = SYSCTL_ONE |
633 | }, |
634 | { |
635 | .procname = "icmp_ratelimit" , |
636 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, |
637 | .maxlen = sizeof(int), |
638 | .mode = 0644, |
639 | .proc_handler = proc_dointvec_ms_jiffies, |
640 | }, |
641 | { |
642 | .procname = "icmp_ratemask" , |
643 | .data = &init_net.ipv4.sysctl_icmp_ratemask, |
644 | .maxlen = sizeof(int), |
645 | .mode = 0644, |
646 | .proc_handler = proc_dointvec |
647 | }, |
648 | { |
649 | .procname = "ping_group_range" , |
650 | .data = &init_net.ipv4.ping_group_range.range, |
651 | .maxlen = sizeof(gid_t)*2, |
652 | .mode = 0644, |
653 | .proc_handler = ipv4_ping_group_range, |
654 | }, |
655 | #ifdef CONFIG_NET_L3_MASTER_DEV |
656 | { |
657 | .procname = "raw_l3mdev_accept" , |
658 | .data = &init_net.ipv4.sysctl_raw_l3mdev_accept, |
659 | .maxlen = sizeof(u8), |
660 | .mode = 0644, |
661 | .proc_handler = proc_dou8vec_minmax, |
662 | .extra1 = SYSCTL_ZERO, |
663 | .extra2 = SYSCTL_ONE, |
664 | }, |
665 | #endif |
666 | { |
667 | .procname = "tcp_ecn" , |
668 | .data = &init_net.ipv4.sysctl_tcp_ecn, |
669 | .maxlen = sizeof(u8), |
670 | .mode = 0644, |
671 | .proc_handler = proc_dou8vec_minmax, |
672 | .extra1 = SYSCTL_ZERO, |
673 | .extra2 = SYSCTL_TWO, |
674 | }, |
675 | { |
676 | .procname = "tcp_ecn_fallback" , |
677 | .data = &init_net.ipv4.sysctl_tcp_ecn_fallback, |
678 | .maxlen = sizeof(u8), |
679 | .mode = 0644, |
680 | .proc_handler = proc_dou8vec_minmax, |
681 | .extra1 = SYSCTL_ZERO, |
682 | .extra2 = SYSCTL_ONE, |
683 | }, |
684 | { |
685 | .procname = "ip_dynaddr" , |
686 | .data = &init_net.ipv4.sysctl_ip_dynaddr, |
687 | .maxlen = sizeof(u8), |
688 | .mode = 0644, |
689 | .proc_handler = proc_dou8vec_minmax, |
690 | }, |
691 | { |
692 | .procname = "ip_early_demux" , |
693 | .data = &init_net.ipv4.sysctl_ip_early_demux, |
694 | .maxlen = sizeof(u8), |
695 | .mode = 0644, |
696 | .proc_handler = proc_dou8vec_minmax, |
697 | }, |
698 | { |
699 | .procname = "udp_early_demux" , |
700 | .data = &init_net.ipv4.sysctl_udp_early_demux, |
701 | .maxlen = sizeof(u8), |
702 | .mode = 0644, |
703 | .proc_handler = proc_dou8vec_minmax, |
704 | }, |
705 | { |
706 | .procname = "tcp_early_demux" , |
707 | .data = &init_net.ipv4.sysctl_tcp_early_demux, |
708 | .maxlen = sizeof(u8), |
709 | .mode = 0644, |
710 | .proc_handler = proc_dou8vec_minmax, |
711 | }, |
712 | { |
713 | .procname = "nexthop_compat_mode" , |
714 | .data = &init_net.ipv4.sysctl_nexthop_compat_mode, |
715 | .maxlen = sizeof(u8), |
716 | .mode = 0644, |
717 | .proc_handler = proc_dou8vec_minmax, |
718 | .extra1 = SYSCTL_ZERO, |
719 | .extra2 = SYSCTL_ONE, |
720 | }, |
721 | { |
722 | .procname = "ip_default_ttl" , |
723 | .data = &init_net.ipv4.sysctl_ip_default_ttl, |
724 | .maxlen = sizeof(u8), |
725 | .mode = 0644, |
726 | .proc_handler = proc_dou8vec_minmax, |
727 | .extra1 = &ip_ttl_min, |
728 | .extra2 = &ip_ttl_max, |
729 | }, |
730 | { |
731 | .procname = "ip_local_port_range" , |
732 | .maxlen = 0, |
733 | .data = &init_net, |
734 | .mode = 0644, |
735 | .proc_handler = ipv4_local_port_range, |
736 | }, |
737 | { |
738 | .procname = "ip_local_reserved_ports" , |
739 | .data = &init_net.ipv4.sysctl_local_reserved_ports, |
740 | .maxlen = 65536, |
741 | .mode = 0644, |
742 | .proc_handler = proc_do_large_bitmap, |
743 | }, |
744 | { |
745 | .procname = "ip_no_pmtu_disc" , |
746 | .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc, |
747 | .maxlen = sizeof(u8), |
748 | .mode = 0644, |
749 | .proc_handler = proc_dou8vec_minmax, |
750 | }, |
751 | { |
752 | .procname = "ip_forward_use_pmtu" , |
753 | .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu, |
754 | .maxlen = sizeof(u8), |
755 | .mode = 0644, |
756 | .proc_handler = proc_dou8vec_minmax, |
757 | }, |
758 | { |
759 | .procname = "ip_forward_update_priority" , |
760 | .data = &init_net.ipv4.sysctl_ip_fwd_update_priority, |
761 | .maxlen = sizeof(u8), |
762 | .mode = 0644, |
763 | .proc_handler = ipv4_fwd_update_priority, |
764 | .extra1 = SYSCTL_ZERO, |
765 | .extra2 = SYSCTL_ONE, |
766 | }, |
767 | { |
768 | .procname = "ip_nonlocal_bind" , |
769 | .data = &init_net.ipv4.sysctl_ip_nonlocal_bind, |
770 | .maxlen = sizeof(u8), |
771 | .mode = 0644, |
772 | .proc_handler = proc_dou8vec_minmax, |
773 | }, |
774 | { |
775 | .procname = "ip_autobind_reuse" , |
776 | .data = &init_net.ipv4.sysctl_ip_autobind_reuse, |
777 | .maxlen = sizeof(u8), |
778 | .mode = 0644, |
779 | .proc_handler = proc_dou8vec_minmax, |
780 | .extra1 = SYSCTL_ZERO, |
781 | .extra2 = SYSCTL_ONE, |
782 | }, |
783 | { |
784 | .procname = "fwmark_reflect" , |
785 | .data = &init_net.ipv4.sysctl_fwmark_reflect, |
786 | .maxlen = sizeof(u8), |
787 | .mode = 0644, |
788 | .proc_handler = proc_dou8vec_minmax, |
789 | }, |
790 | { |
791 | .procname = "tcp_fwmark_accept" , |
792 | .data = &init_net.ipv4.sysctl_tcp_fwmark_accept, |
793 | .maxlen = sizeof(u8), |
794 | .mode = 0644, |
795 | .proc_handler = proc_dou8vec_minmax, |
796 | }, |
797 | #ifdef CONFIG_NET_L3_MASTER_DEV |
798 | { |
799 | .procname = "tcp_l3mdev_accept" , |
800 | .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept, |
801 | .maxlen = sizeof(u8), |
802 | .mode = 0644, |
803 | .proc_handler = proc_dou8vec_minmax, |
804 | .extra1 = SYSCTL_ZERO, |
805 | .extra2 = SYSCTL_ONE, |
806 | }, |
807 | #endif |
808 | { |
809 | .procname = "tcp_mtu_probing" , |
810 | .data = &init_net.ipv4.sysctl_tcp_mtu_probing, |
811 | .maxlen = sizeof(u8), |
812 | .mode = 0644, |
813 | .proc_handler = proc_dou8vec_minmax, |
814 | }, |
815 | { |
816 | .procname = "tcp_base_mss" , |
817 | .data = &init_net.ipv4.sysctl_tcp_base_mss, |
818 | .maxlen = sizeof(int), |
819 | .mode = 0644, |
820 | .proc_handler = proc_dointvec, |
821 | }, |
822 | { |
823 | .procname = "tcp_min_snd_mss" , |
824 | .data = &init_net.ipv4.sysctl_tcp_min_snd_mss, |
825 | .maxlen = sizeof(int), |
826 | .mode = 0644, |
827 | .proc_handler = proc_dointvec_minmax, |
828 | .extra1 = &tcp_min_snd_mss_min, |
829 | .extra2 = &tcp_min_snd_mss_max, |
830 | }, |
831 | { |
832 | .procname = "tcp_mtu_probe_floor" , |
833 | .data = &init_net.ipv4.sysctl_tcp_mtu_probe_floor, |
834 | .maxlen = sizeof(int), |
835 | .mode = 0644, |
836 | .proc_handler = proc_dointvec_minmax, |
837 | .extra1 = &tcp_min_snd_mss_min, |
838 | .extra2 = &tcp_min_snd_mss_max, |
839 | }, |
840 | { |
841 | .procname = "tcp_probe_threshold" , |
842 | .data = &init_net.ipv4.sysctl_tcp_probe_threshold, |
843 | .maxlen = sizeof(int), |
844 | .mode = 0644, |
845 | .proc_handler = proc_dointvec, |
846 | }, |
847 | { |
848 | .procname = "tcp_probe_interval" , |
849 | .data = &init_net.ipv4.sysctl_tcp_probe_interval, |
850 | .maxlen = sizeof(u32), |
851 | .mode = 0644, |
852 | .proc_handler = proc_douintvec_minmax, |
853 | .extra2 = &u32_max_div_HZ, |
854 | }, |
855 | { |
856 | .procname = "igmp_link_local_mcast_reports" , |
857 | .data = &init_net.ipv4.sysctl_igmp_llm_reports, |
858 | .maxlen = sizeof(u8), |
859 | .mode = 0644, |
860 | .proc_handler = proc_dou8vec_minmax, |
861 | }, |
862 | { |
863 | .procname = "igmp_max_memberships" , |
864 | .data = &init_net.ipv4.sysctl_igmp_max_memberships, |
865 | .maxlen = sizeof(int), |
866 | .mode = 0644, |
867 | .proc_handler = proc_dointvec |
868 | }, |
869 | { |
870 | .procname = "igmp_max_msf" , |
871 | .data = &init_net.ipv4.sysctl_igmp_max_msf, |
872 | .maxlen = sizeof(int), |
873 | .mode = 0644, |
874 | .proc_handler = proc_dointvec |
875 | }, |
876 | #ifdef CONFIG_IP_MULTICAST |
877 | { |
878 | .procname = "igmp_qrv" , |
879 | .data = &init_net.ipv4.sysctl_igmp_qrv, |
880 | .maxlen = sizeof(int), |
881 | .mode = 0644, |
882 | .proc_handler = proc_dointvec_minmax, |
883 | .extra1 = SYSCTL_ONE |
884 | }, |
885 | #endif |
886 | { |
887 | .procname = "tcp_congestion_control" , |
888 | .data = &init_net.ipv4.tcp_congestion_control, |
889 | .mode = 0644, |
890 | .maxlen = TCP_CA_NAME_MAX, |
891 | .proc_handler = proc_tcp_congestion_control, |
892 | }, |
893 | { |
894 | .procname = "tcp_available_congestion_control" , |
895 | .maxlen = TCP_CA_BUF_MAX, |
896 | .mode = 0444, |
897 | .proc_handler = proc_tcp_available_congestion_control, |
898 | }, |
899 | { |
900 | .procname = "tcp_allowed_congestion_control" , |
901 | .maxlen = TCP_CA_BUF_MAX, |
902 | .mode = 0644, |
903 | .proc_handler = proc_allowed_congestion_control, |
904 | }, |
905 | { |
906 | .procname = "tcp_keepalive_time" , |
907 | .data = &init_net.ipv4.sysctl_tcp_keepalive_time, |
908 | .maxlen = sizeof(int), |
909 | .mode = 0644, |
910 | .proc_handler = proc_dointvec_jiffies, |
911 | }, |
912 | { |
913 | .procname = "tcp_keepalive_probes" , |
914 | .data = &init_net.ipv4.sysctl_tcp_keepalive_probes, |
915 | .maxlen = sizeof(u8), |
916 | .mode = 0644, |
917 | .proc_handler = proc_dou8vec_minmax, |
918 | }, |
919 | { |
920 | .procname = "tcp_keepalive_intvl" , |
921 | .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl, |
922 | .maxlen = sizeof(int), |
923 | .mode = 0644, |
924 | .proc_handler = proc_dointvec_jiffies, |
925 | }, |
926 | { |
927 | .procname = "tcp_syn_retries" , |
928 | .data = &init_net.ipv4.sysctl_tcp_syn_retries, |
929 | .maxlen = sizeof(u8), |
930 | .mode = 0644, |
931 | .proc_handler = proc_dou8vec_minmax, |
932 | .extra1 = &tcp_syn_retries_min, |
933 | .extra2 = &tcp_syn_retries_max |
934 | }, |
935 | { |
936 | .procname = "tcp_synack_retries" , |
937 | .data = &init_net.ipv4.sysctl_tcp_synack_retries, |
938 | .maxlen = sizeof(u8), |
939 | .mode = 0644, |
940 | .proc_handler = proc_dou8vec_minmax, |
941 | }, |
942 | #ifdef CONFIG_SYN_COOKIES |
943 | { |
944 | .procname = "tcp_syncookies" , |
945 | .data = &init_net.ipv4.sysctl_tcp_syncookies, |
946 | .maxlen = sizeof(u8), |
947 | .mode = 0644, |
948 | .proc_handler = proc_dou8vec_minmax, |
949 | }, |
950 | #endif |
951 | { |
952 | .procname = "tcp_migrate_req" , |
953 | .data = &init_net.ipv4.sysctl_tcp_migrate_req, |
954 | .maxlen = sizeof(u8), |
955 | .mode = 0644, |
956 | .proc_handler = proc_dou8vec_minmax, |
957 | .extra1 = SYSCTL_ZERO, |
958 | .extra2 = SYSCTL_ONE |
959 | }, |
960 | { |
961 | .procname = "tcp_reordering" , |
962 | .data = &init_net.ipv4.sysctl_tcp_reordering, |
963 | .maxlen = sizeof(int), |
964 | .mode = 0644, |
965 | .proc_handler = proc_dointvec |
966 | }, |
967 | { |
968 | .procname = "tcp_retries1" , |
969 | .data = &init_net.ipv4.sysctl_tcp_retries1, |
970 | .maxlen = sizeof(u8), |
971 | .mode = 0644, |
972 | .proc_handler = proc_dou8vec_minmax, |
973 | .extra2 = &tcp_retr1_max |
974 | }, |
975 | { |
976 | .procname = "tcp_retries2" , |
977 | .data = &init_net.ipv4.sysctl_tcp_retries2, |
978 | .maxlen = sizeof(u8), |
979 | .mode = 0644, |
980 | .proc_handler = proc_dou8vec_minmax, |
981 | }, |
982 | { |
983 | .procname = "tcp_orphan_retries" , |
984 | .data = &init_net.ipv4.sysctl_tcp_orphan_retries, |
985 | .maxlen = sizeof(u8), |
986 | .mode = 0644, |
987 | .proc_handler = proc_dou8vec_minmax, |
988 | }, |
989 | { |
990 | .procname = "tcp_fin_timeout" , |
991 | .data = &init_net.ipv4.sysctl_tcp_fin_timeout, |
992 | .maxlen = sizeof(int), |
993 | .mode = 0644, |
994 | .proc_handler = proc_dointvec_jiffies, |
995 | }, |
996 | { |
997 | .procname = "tcp_notsent_lowat" , |
998 | .data = &init_net.ipv4.sysctl_tcp_notsent_lowat, |
999 | .maxlen = sizeof(unsigned int), |
1000 | .mode = 0644, |
1001 | .proc_handler = proc_douintvec, |
1002 | }, |
1003 | { |
1004 | .procname = "tcp_tw_reuse" , |
1005 | .data = &init_net.ipv4.sysctl_tcp_tw_reuse, |
1006 | .maxlen = sizeof(u8), |
1007 | .mode = 0644, |
1008 | .proc_handler = proc_dou8vec_minmax, |
1009 | .extra1 = SYSCTL_ZERO, |
1010 | .extra2 = SYSCTL_TWO, |
1011 | }, |
1012 | { |
1013 | .procname = "tcp_max_syn_backlog" , |
1014 | .data = &init_net.ipv4.sysctl_max_syn_backlog, |
1015 | .maxlen = sizeof(int), |
1016 | .mode = 0644, |
1017 | .proc_handler = proc_dointvec |
1018 | }, |
1019 | { |
1020 | .procname = "tcp_fastopen" , |
1021 | .data = &init_net.ipv4.sysctl_tcp_fastopen, |
1022 | .maxlen = sizeof(int), |
1023 | .mode = 0644, |
1024 | .proc_handler = proc_dointvec, |
1025 | }, |
1026 | { |
1027 | .procname = "tcp_fastopen_key" , |
1028 | .mode = 0600, |
1029 | .data = &init_net.ipv4.sysctl_tcp_fastopen, |
1030 | /* maxlen to print the list of keys in hex (*2), with dashes |
1031 | * separating doublewords and a comma in between keys. |
1032 | */ |
1033 | .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * |
1034 | 2 * TCP_FASTOPEN_KEY_MAX) + |
1035 | (TCP_FASTOPEN_KEY_MAX * 5)), |
1036 | .proc_handler = proc_tcp_fastopen_key, |
1037 | }, |
1038 | { |
1039 | .procname = "tcp_fastopen_blackhole_timeout_sec" , |
1040 | .data = &init_net.ipv4.sysctl_tcp_fastopen_blackhole_timeout, |
1041 | .maxlen = sizeof(int), |
1042 | .mode = 0644, |
1043 | .proc_handler = proc_tfo_blackhole_detect_timeout, |
1044 | .extra1 = SYSCTL_ZERO, |
1045 | }, |
1046 | #ifdef CONFIG_IP_ROUTE_MULTIPATH |
1047 | { |
1048 | .procname = "fib_multipath_use_neigh" , |
1049 | .data = &init_net.ipv4.sysctl_fib_multipath_use_neigh, |
1050 | .maxlen = sizeof(u8), |
1051 | .mode = 0644, |
1052 | .proc_handler = proc_dou8vec_minmax, |
1053 | .extra1 = SYSCTL_ZERO, |
1054 | .extra2 = SYSCTL_ONE, |
1055 | }, |
1056 | { |
1057 | .procname = "fib_multipath_hash_policy" , |
1058 | .data = &init_net.ipv4.sysctl_fib_multipath_hash_policy, |
1059 | .maxlen = sizeof(u8), |
1060 | .mode = 0644, |
1061 | .proc_handler = proc_fib_multipath_hash_policy, |
1062 | .extra1 = SYSCTL_ZERO, |
1063 | .extra2 = SYSCTL_THREE, |
1064 | }, |
1065 | { |
1066 | .procname = "fib_multipath_hash_fields" , |
1067 | .data = &init_net.ipv4.sysctl_fib_multipath_hash_fields, |
1068 | .maxlen = sizeof(u32), |
1069 | .mode = 0644, |
1070 | .proc_handler = proc_fib_multipath_hash_fields, |
1071 | .extra1 = SYSCTL_ONE, |
1072 | .extra2 = &fib_multipath_hash_fields_all_mask, |
1073 | }, |
1074 | #endif |
1075 | { |
1076 | .procname = "ip_unprivileged_port_start" , |
1077 | .maxlen = sizeof(int), |
1078 | .data = &init_net.ipv4.sysctl_ip_prot_sock, |
1079 | .mode = 0644, |
1080 | .proc_handler = ipv4_privileged_ports, |
1081 | }, |
1082 | #ifdef CONFIG_NET_L3_MASTER_DEV |
1083 | { |
1084 | .procname = "udp_l3mdev_accept" , |
1085 | .data = &init_net.ipv4.sysctl_udp_l3mdev_accept, |
1086 | .maxlen = sizeof(u8), |
1087 | .mode = 0644, |
1088 | .proc_handler = proc_dou8vec_minmax, |
1089 | .extra1 = SYSCTL_ZERO, |
1090 | .extra2 = SYSCTL_ONE, |
1091 | }, |
1092 | #endif |
1093 | { |
1094 | .procname = "tcp_sack" , |
1095 | .data = &init_net.ipv4.sysctl_tcp_sack, |
1096 | .maxlen = sizeof(u8), |
1097 | .mode = 0644, |
1098 | .proc_handler = proc_dou8vec_minmax, |
1099 | }, |
1100 | { |
1101 | .procname = "tcp_window_scaling" , |
1102 | .data = &init_net.ipv4.sysctl_tcp_window_scaling, |
1103 | .maxlen = sizeof(u8), |
1104 | .mode = 0644, |
1105 | .proc_handler = proc_dou8vec_minmax, |
1106 | }, |
1107 | { |
1108 | .procname = "tcp_timestamps" , |
1109 | .data = &init_net.ipv4.sysctl_tcp_timestamps, |
1110 | .maxlen = sizeof(u8), |
1111 | .mode = 0644, |
1112 | .proc_handler = proc_dou8vec_minmax, |
1113 | }, |
1114 | { |
1115 | .procname = "tcp_early_retrans" , |
1116 | .data = &init_net.ipv4.sysctl_tcp_early_retrans, |
1117 | .maxlen = sizeof(u8), |
1118 | .mode = 0644, |
1119 | .proc_handler = proc_dou8vec_minmax, |
1120 | .extra1 = SYSCTL_ZERO, |
1121 | .extra2 = SYSCTL_FOUR, |
1122 | }, |
1123 | { |
1124 | .procname = "tcp_recovery" , |
1125 | .data = &init_net.ipv4.sysctl_tcp_recovery, |
1126 | .maxlen = sizeof(u8), |
1127 | .mode = 0644, |
1128 | .proc_handler = proc_dou8vec_minmax, |
1129 | }, |
1130 | { |
1131 | .procname = "tcp_thin_linear_timeouts" , |
1132 | .data = &init_net.ipv4.sysctl_tcp_thin_linear_timeouts, |
1133 | .maxlen = sizeof(u8), |
1134 | .mode = 0644, |
1135 | .proc_handler = proc_dou8vec_minmax, |
1136 | }, |
1137 | { |
1138 | .procname = "tcp_slow_start_after_idle" , |
1139 | .data = &init_net.ipv4.sysctl_tcp_slow_start_after_idle, |
1140 | .maxlen = sizeof(u8), |
1141 | .mode = 0644, |
1142 | .proc_handler = proc_dou8vec_minmax, |
1143 | }, |
1144 | { |
1145 | .procname = "tcp_retrans_collapse" , |
1146 | .data = &init_net.ipv4.sysctl_tcp_retrans_collapse, |
1147 | .maxlen = sizeof(u8), |
1148 | .mode = 0644, |
1149 | .proc_handler = proc_dou8vec_minmax, |
1150 | }, |
1151 | { |
1152 | .procname = "tcp_stdurg" , |
1153 | .data = &init_net.ipv4.sysctl_tcp_stdurg, |
1154 | .maxlen = sizeof(u8), |
1155 | .mode = 0644, |
1156 | .proc_handler = proc_dou8vec_minmax, |
1157 | }, |
1158 | { |
1159 | .procname = "tcp_rfc1337" , |
1160 | .data = &init_net.ipv4.sysctl_tcp_rfc1337, |
1161 | .maxlen = sizeof(u8), |
1162 | .mode = 0644, |
1163 | .proc_handler = proc_dou8vec_minmax, |
1164 | }, |
1165 | { |
1166 | .procname = "tcp_abort_on_overflow" , |
1167 | .data = &init_net.ipv4.sysctl_tcp_abort_on_overflow, |
1168 | .maxlen = sizeof(u8), |
1169 | .mode = 0644, |
1170 | .proc_handler = proc_dou8vec_minmax, |
1171 | }, |
1172 | { |
1173 | .procname = "tcp_fack" , |
1174 | .data = &init_net.ipv4.sysctl_tcp_fack, |
1175 | .maxlen = sizeof(u8), |
1176 | .mode = 0644, |
1177 | .proc_handler = proc_dou8vec_minmax, |
1178 | }, |
1179 | { |
1180 | .procname = "tcp_max_reordering" , |
1181 | .data = &init_net.ipv4.sysctl_tcp_max_reordering, |
1182 | .maxlen = sizeof(int), |
1183 | .mode = 0644, |
1184 | .proc_handler = proc_dointvec |
1185 | }, |
1186 | { |
1187 | .procname = "tcp_dsack" , |
1188 | .data = &init_net.ipv4.sysctl_tcp_dsack, |
1189 | .maxlen = sizeof(u8), |
1190 | .mode = 0644, |
1191 | .proc_handler = proc_dou8vec_minmax, |
1192 | }, |
1193 | { |
1194 | .procname = "tcp_app_win" , |
1195 | .data = &init_net.ipv4.sysctl_tcp_app_win, |
1196 | .maxlen = sizeof(u8), |
1197 | .mode = 0644, |
1198 | .proc_handler = proc_dou8vec_minmax, |
1199 | .extra1 = SYSCTL_ZERO, |
1200 | .extra2 = &tcp_app_win_max, |
1201 | }, |
1202 | { |
1203 | .procname = "tcp_adv_win_scale" , |
1204 | .data = &init_net.ipv4.sysctl_tcp_adv_win_scale, |
1205 | .maxlen = sizeof(int), |
1206 | .mode = 0644, |
1207 | .proc_handler = proc_dointvec_minmax, |
1208 | .extra1 = &tcp_adv_win_scale_min, |
1209 | .extra2 = &tcp_adv_win_scale_max, |
1210 | }, |
1211 | { |
1212 | .procname = "tcp_frto" , |
1213 | .data = &init_net.ipv4.sysctl_tcp_frto, |
1214 | .maxlen = sizeof(u8), |
1215 | .mode = 0644, |
1216 | .proc_handler = proc_dou8vec_minmax, |
1217 | }, |
1218 | { |
1219 | .procname = "tcp_no_metrics_save" , |
1220 | .data = &init_net.ipv4.sysctl_tcp_nometrics_save, |
1221 | .maxlen = sizeof(u8), |
1222 | .mode = 0644, |
1223 | .proc_handler = proc_dou8vec_minmax, |
1224 | }, |
1225 | { |
1226 | .procname = "tcp_no_ssthresh_metrics_save" , |
1227 | .data = &init_net.ipv4.sysctl_tcp_no_ssthresh_metrics_save, |
1228 | .maxlen = sizeof(u8), |
1229 | .mode = 0644, |
1230 | .proc_handler = proc_dou8vec_minmax, |
1231 | .extra1 = SYSCTL_ZERO, |
1232 | .extra2 = SYSCTL_ONE, |
1233 | }, |
1234 | { |
1235 | .procname = "tcp_moderate_rcvbuf" , |
1236 | .data = &init_net.ipv4.sysctl_tcp_moderate_rcvbuf, |
1237 | .maxlen = sizeof(u8), |
1238 | .mode = 0644, |
1239 | .proc_handler = proc_dou8vec_minmax, |
1240 | }, |
1241 | { |
1242 | .procname = "tcp_tso_win_divisor" , |
1243 | .data = &init_net.ipv4.sysctl_tcp_tso_win_divisor, |
1244 | .maxlen = sizeof(u8), |
1245 | .mode = 0644, |
1246 | .proc_handler = proc_dou8vec_minmax, |
1247 | }, |
1248 | { |
1249 | .procname = "tcp_workaround_signed_windows" , |
1250 | .data = &init_net.ipv4.sysctl_tcp_workaround_signed_windows, |
1251 | .maxlen = sizeof(u8), |
1252 | .mode = 0644, |
1253 | .proc_handler = proc_dou8vec_minmax, |
1254 | }, |
1255 | { |
1256 | .procname = "tcp_limit_output_bytes" , |
1257 | .data = &init_net.ipv4.sysctl_tcp_limit_output_bytes, |
1258 | .maxlen = sizeof(int), |
1259 | .mode = 0644, |
1260 | .proc_handler = proc_dointvec |
1261 | }, |
1262 | { |
1263 | .procname = "tcp_challenge_ack_limit" , |
1264 | .data = &init_net.ipv4.sysctl_tcp_challenge_ack_limit, |
1265 | .maxlen = sizeof(int), |
1266 | .mode = 0644, |
1267 | .proc_handler = proc_dointvec |
1268 | }, |
1269 | { |
1270 | .procname = "tcp_min_tso_segs" , |
1271 | .data = &init_net.ipv4.sysctl_tcp_min_tso_segs, |
1272 | .maxlen = sizeof(u8), |
1273 | .mode = 0644, |
1274 | .proc_handler = proc_dou8vec_minmax, |
1275 | .extra1 = SYSCTL_ONE, |
1276 | }, |
1277 | { |
1278 | .procname = "tcp_tso_rtt_log" , |
1279 | .data = &init_net.ipv4.sysctl_tcp_tso_rtt_log, |
1280 | .maxlen = sizeof(u8), |
1281 | .mode = 0644, |
1282 | .proc_handler = proc_dou8vec_minmax, |
1283 | }, |
1284 | { |
1285 | .procname = "tcp_min_rtt_wlen" , |
1286 | .data = &init_net.ipv4.sysctl_tcp_min_rtt_wlen, |
1287 | .maxlen = sizeof(int), |
1288 | .mode = 0644, |
1289 | .proc_handler = proc_dointvec_minmax, |
1290 | .extra1 = SYSCTL_ZERO, |
1291 | .extra2 = &one_day_secs |
1292 | }, |
1293 | { |
1294 | .procname = "tcp_autocorking" , |
1295 | .data = &init_net.ipv4.sysctl_tcp_autocorking, |
1296 | .maxlen = sizeof(u8), |
1297 | .mode = 0644, |
1298 | .proc_handler = proc_dou8vec_minmax, |
1299 | .extra1 = SYSCTL_ZERO, |
1300 | .extra2 = SYSCTL_ONE, |
1301 | }, |
1302 | { |
1303 | .procname = "tcp_invalid_ratelimit" , |
1304 | .data = &init_net.ipv4.sysctl_tcp_invalid_ratelimit, |
1305 | .maxlen = sizeof(int), |
1306 | .mode = 0644, |
1307 | .proc_handler = proc_dointvec_ms_jiffies, |
1308 | }, |
1309 | { |
1310 | .procname = "tcp_pacing_ss_ratio" , |
1311 | .data = &init_net.ipv4.sysctl_tcp_pacing_ss_ratio, |
1312 | .maxlen = sizeof(int), |
1313 | .mode = 0644, |
1314 | .proc_handler = proc_dointvec_minmax, |
1315 | .extra1 = SYSCTL_ZERO, |
1316 | .extra2 = SYSCTL_ONE_THOUSAND, |
1317 | }, |
1318 | { |
1319 | .procname = "tcp_pacing_ca_ratio" , |
1320 | .data = &init_net.ipv4.sysctl_tcp_pacing_ca_ratio, |
1321 | .maxlen = sizeof(int), |
1322 | .mode = 0644, |
1323 | .proc_handler = proc_dointvec_minmax, |
1324 | .extra1 = SYSCTL_ZERO, |
1325 | .extra2 = SYSCTL_ONE_THOUSAND, |
1326 | }, |
1327 | { |
1328 | .procname = "tcp_wmem" , |
1329 | .data = &init_net.ipv4.sysctl_tcp_wmem, |
1330 | .maxlen = sizeof(init_net.ipv4.sysctl_tcp_wmem), |
1331 | .mode = 0644, |
1332 | .proc_handler = proc_dointvec_minmax, |
1333 | .extra1 = SYSCTL_ONE, |
1334 | }, |
1335 | { |
1336 | .procname = "tcp_rmem" , |
1337 | .data = &init_net.ipv4.sysctl_tcp_rmem, |
1338 | .maxlen = sizeof(init_net.ipv4.sysctl_tcp_rmem), |
1339 | .mode = 0644, |
1340 | .proc_handler = proc_dointvec_minmax, |
1341 | .extra1 = SYSCTL_ONE, |
1342 | }, |
1343 | { |
1344 | .procname = "tcp_comp_sack_delay_ns" , |
1345 | .data = &init_net.ipv4.sysctl_tcp_comp_sack_delay_ns, |
1346 | .maxlen = sizeof(unsigned long), |
1347 | .mode = 0644, |
1348 | .proc_handler = proc_doulongvec_minmax, |
1349 | }, |
1350 | { |
1351 | .procname = "tcp_comp_sack_slack_ns" , |
1352 | .data = &init_net.ipv4.sysctl_tcp_comp_sack_slack_ns, |
1353 | .maxlen = sizeof(unsigned long), |
1354 | .mode = 0644, |
1355 | .proc_handler = proc_doulongvec_minmax, |
1356 | }, |
1357 | { |
1358 | .procname = "tcp_comp_sack_nr" , |
1359 | .data = &init_net.ipv4.sysctl_tcp_comp_sack_nr, |
1360 | .maxlen = sizeof(u8), |
1361 | .mode = 0644, |
1362 | .proc_handler = proc_dou8vec_minmax, |
1363 | .extra1 = SYSCTL_ZERO, |
1364 | }, |
1365 | { |
1366 | .procname = "tcp_backlog_ack_defer" , |
1367 | .data = &init_net.ipv4.sysctl_tcp_backlog_ack_defer, |
1368 | .maxlen = sizeof(u8), |
1369 | .mode = 0644, |
1370 | .proc_handler = proc_dou8vec_minmax, |
1371 | .extra1 = SYSCTL_ZERO, |
1372 | .extra2 = SYSCTL_ONE, |
1373 | }, |
1374 | { |
1375 | .procname = "tcp_reflect_tos" , |
1376 | .data = &init_net.ipv4.sysctl_tcp_reflect_tos, |
1377 | .maxlen = sizeof(u8), |
1378 | .mode = 0644, |
1379 | .proc_handler = proc_dou8vec_minmax, |
1380 | .extra1 = SYSCTL_ZERO, |
1381 | .extra2 = SYSCTL_ONE, |
1382 | }, |
1383 | { |
1384 | .procname = "tcp_ehash_entries" , |
1385 | .data = &init_net.ipv4.sysctl_tcp_child_ehash_entries, |
1386 | .mode = 0444, |
1387 | .proc_handler = proc_tcp_ehash_entries, |
1388 | }, |
1389 | { |
1390 | .procname = "tcp_child_ehash_entries" , |
1391 | .data = &init_net.ipv4.sysctl_tcp_child_ehash_entries, |
1392 | .maxlen = sizeof(unsigned int), |
1393 | .mode = 0644, |
1394 | .proc_handler = proc_douintvec_minmax, |
1395 | .extra1 = SYSCTL_ZERO, |
1396 | .extra2 = &tcp_child_ehash_entries_max, |
1397 | }, |
1398 | { |
1399 | .procname = "udp_hash_entries" , |
1400 | .data = &init_net.ipv4.sysctl_udp_child_hash_entries, |
1401 | .mode = 0444, |
1402 | .proc_handler = proc_udp_hash_entries, |
1403 | }, |
1404 | { |
1405 | .procname = "udp_child_hash_entries" , |
1406 | .data = &init_net.ipv4.sysctl_udp_child_hash_entries, |
1407 | .maxlen = sizeof(unsigned int), |
1408 | .mode = 0644, |
1409 | .proc_handler = proc_douintvec_minmax, |
1410 | .extra1 = SYSCTL_ZERO, |
1411 | .extra2 = &udp_child_hash_entries_max, |
1412 | }, |
1413 | { |
1414 | .procname = "udp_rmem_min" , |
1415 | .data = &init_net.ipv4.sysctl_udp_rmem_min, |
1416 | .maxlen = sizeof(init_net.ipv4.sysctl_udp_rmem_min), |
1417 | .mode = 0644, |
1418 | .proc_handler = proc_dointvec_minmax, |
1419 | .extra1 = SYSCTL_ONE |
1420 | }, |
1421 | { |
1422 | .procname = "udp_wmem_min" , |
1423 | .data = &init_net.ipv4.sysctl_udp_wmem_min, |
1424 | .maxlen = sizeof(init_net.ipv4.sysctl_udp_wmem_min), |
1425 | .mode = 0644, |
1426 | .proc_handler = proc_dointvec_minmax, |
1427 | .extra1 = SYSCTL_ONE |
1428 | }, |
1429 | { |
1430 | .procname = "fib_notify_on_flag_change" , |
1431 | .data = &init_net.ipv4.sysctl_fib_notify_on_flag_change, |
1432 | .maxlen = sizeof(u8), |
1433 | .mode = 0644, |
1434 | .proc_handler = proc_dou8vec_minmax, |
1435 | .extra1 = SYSCTL_ZERO, |
1436 | .extra2 = SYSCTL_TWO, |
1437 | }, |
1438 | { |
1439 | .procname = "tcp_plb_enabled" , |
1440 | .data = &init_net.ipv4.sysctl_tcp_plb_enabled, |
1441 | .maxlen = sizeof(u8), |
1442 | .mode = 0644, |
1443 | .proc_handler = proc_dou8vec_minmax, |
1444 | .extra1 = SYSCTL_ZERO, |
1445 | .extra2 = SYSCTL_ONE, |
1446 | }, |
1447 | { |
1448 | .procname = "tcp_plb_idle_rehash_rounds" , |
1449 | .data = &init_net.ipv4.sysctl_tcp_plb_idle_rehash_rounds, |
1450 | .maxlen = sizeof(u8), |
1451 | .mode = 0644, |
1452 | .proc_handler = proc_dou8vec_minmax, |
1453 | .extra2 = &tcp_plb_max_rounds, |
1454 | }, |
1455 | { |
1456 | .procname = "tcp_plb_rehash_rounds" , |
1457 | .data = &init_net.ipv4.sysctl_tcp_plb_rehash_rounds, |
1458 | .maxlen = sizeof(u8), |
1459 | .mode = 0644, |
1460 | .proc_handler = proc_dou8vec_minmax, |
1461 | .extra2 = &tcp_plb_max_rounds, |
1462 | }, |
1463 | { |
1464 | .procname = "tcp_plb_suspend_rto_sec" , |
1465 | .data = &init_net.ipv4.sysctl_tcp_plb_suspend_rto_sec, |
1466 | .maxlen = sizeof(u8), |
1467 | .mode = 0644, |
1468 | .proc_handler = proc_dou8vec_minmax, |
1469 | }, |
1470 | { |
1471 | .procname = "tcp_plb_cong_thresh" , |
1472 | .data = &init_net.ipv4.sysctl_tcp_plb_cong_thresh, |
1473 | .maxlen = sizeof(int), |
1474 | .mode = 0644, |
1475 | .proc_handler = proc_dointvec_minmax, |
1476 | .extra1 = SYSCTL_ZERO, |
1477 | .extra2 = &tcp_plb_max_cong_thresh, |
1478 | }, |
1479 | { |
1480 | .procname = "tcp_syn_linear_timeouts" , |
1481 | .data = &init_net.ipv4.sysctl_tcp_syn_linear_timeouts, |
1482 | .maxlen = sizeof(u8), |
1483 | .mode = 0644, |
1484 | .proc_handler = proc_dou8vec_minmax, |
1485 | .extra1 = SYSCTL_ZERO, |
1486 | .extra2 = &tcp_syn_linear_timeouts_max, |
1487 | }, |
1488 | { |
1489 | .procname = "tcp_shrink_window" , |
1490 | .data = &init_net.ipv4.sysctl_tcp_shrink_window, |
1491 | .maxlen = sizeof(u8), |
1492 | .mode = 0644, |
1493 | .proc_handler = proc_dou8vec_minmax, |
1494 | .extra1 = SYSCTL_ZERO, |
1495 | .extra2 = SYSCTL_ONE, |
1496 | }, |
1497 | { |
1498 | .procname = "tcp_pingpong_thresh" , |
1499 | .data = &init_net.ipv4.sysctl_tcp_pingpong_thresh, |
1500 | .maxlen = sizeof(u8), |
1501 | .mode = 0644, |
1502 | .proc_handler = proc_dou8vec_minmax, |
1503 | .extra1 = SYSCTL_ONE, |
1504 | }, |
1505 | { } |
1506 | }; |
1507 | |
1508 | static __net_init int ipv4_sysctl_init_net(struct net *net) |
1509 | { |
1510 | struct ctl_table *table; |
1511 | |
1512 | table = ipv4_net_table; |
1513 | if (!net_eq(net1: net, net2: &init_net)) { |
1514 | int i; |
1515 | |
1516 | table = kmemdup(p: table, size: sizeof(ipv4_net_table), GFP_KERNEL); |
1517 | if (!table) |
1518 | goto err_alloc; |
1519 | |
1520 | for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) { |
1521 | if (table[i].data) { |
1522 | /* Update the variables to point into |
1523 | * the current struct net |
1524 | */ |
1525 | table[i].data += (void *)net - (void *)&init_net; |
1526 | } else { |
1527 | /* Entries without data pointer are global; |
1528 | * Make them read-only in non-init_net ns |
1529 | */ |
1530 | table[i].mode &= ~0222; |
1531 | } |
1532 | } |
1533 | } |
1534 | |
1535 | net->ipv4.ipv4_hdr = register_net_sysctl_sz(net, path: "net/ipv4" , table, |
1536 | ARRAY_SIZE(ipv4_net_table)); |
1537 | if (!net->ipv4.ipv4_hdr) |
1538 | goto err_reg; |
1539 | |
1540 | net->ipv4.sysctl_local_reserved_ports = kzalloc(size: 65536 / 8, GFP_KERNEL); |
1541 | if (!net->ipv4.sysctl_local_reserved_ports) |
1542 | goto err_ports; |
1543 | |
1544 | return 0; |
1545 | |
1546 | err_ports: |
1547 | unregister_net_sysctl_table(header: net->ipv4.ipv4_hdr); |
1548 | err_reg: |
1549 | if (!net_eq(net1: net, net2: &init_net)) |
1550 | kfree(objp: table); |
1551 | err_alloc: |
1552 | return -ENOMEM; |
1553 | } |
1554 | |
1555 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) |
1556 | { |
1557 | struct ctl_table *table; |
1558 | |
1559 | kfree(objp: net->ipv4.sysctl_local_reserved_ports); |
1560 | table = net->ipv4.ipv4_hdr->ctl_table_arg; |
1561 | unregister_net_sysctl_table(header: net->ipv4.ipv4_hdr); |
1562 | kfree(objp: table); |
1563 | } |
1564 | |
1565 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { |
1566 | .init = ipv4_sysctl_init_net, |
1567 | .exit = ipv4_sysctl_exit_net, |
1568 | }; |
1569 | |
1570 | static __init int sysctl_ipv4_init(void) |
1571 | { |
1572 | struct ctl_table_header *hdr; |
1573 | |
1574 | hdr = register_net_sysctl(&init_net, "net/ipv4" , ipv4_table); |
1575 | if (!hdr) |
1576 | return -ENOMEM; |
1577 | |
1578 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { |
1579 | unregister_net_sysctl_table(header: hdr); |
1580 | return -ENOMEM; |
1581 | } |
1582 | |
1583 | return 0; |
1584 | } |
1585 | |
1586 | __initcall(sysctl_ipv4_init); |
1587 | |