projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge tag 'platform-drivers-x86-v4.5-1' of git://git.infradead.org/users/dvhart/linux...
[deliverable/linux.git] / net / ipv4 / sysctl_net_ipv4.c
1 /*
2 * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
3 *
4 * Begun April 1, 1996, Mike Shaver.
5 * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
6 */
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/tcp_memcontrol.h>
28
29 static int zero;
30 static int one = 1;
31 static int four = 4;
32 static int thousand = 1000;
33 static int gso_max_segs = GSO_MAX_SEGS;
34 static int tcp_retr1_max = 255;
35 static int ip_local_port_range_min[] = { 1, 1 };
36 static int ip_local_port_range_max[] = { 65535, 65535 };
37 static int tcp_adv_win_scale_min = -31;
38 static int tcp_adv_win_scale_max = 31;
39 static int ip_ttl_min = 1;
40 static int ip_ttl_max = 255;
41 static int tcp_syn_retries_min = 1;
42 static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
43 static int ip_ping_group_range_min[] = { 0, 0 };
44 static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
45
46 /* Update system visible IP port range */
47 static void set_local_port_range(struct net *net, int range[2])
48 {
49 bool same_parity = !((range[0] ^ range[1]) & 1);
50
51 write_seqlock_bh(&net->ipv4.ip_local_ports.lock);
52 if (same_parity && !net->ipv4.ip_local_ports.warned) {
53 net->ipv4.ip_local_ports.warned = true;
54 pr_err_ratelimited("ip_local_port_range: prefer different parity for start/end values.\n");
55 }
56 net->ipv4.ip_local_ports.range[0] = range[0];
57 net->ipv4.ip_local_ports.range[1] = range[1];
58 write_sequnlock_bh(&net->ipv4.ip_local_ports.lock);
59 }
60
61 /* Validate changes from /proc interface. */
62 static int ipv4_local_port_range(struct ctl_table *table, int write,
63 void __user *buffer,
64 size_t *lenp, loff_t *ppos)
65 {
66 struct net *net =
67 container_of(table->data, struct net, ipv4.ip_local_ports.range);
68 int ret;
69 int range[2];
70 struct ctl_table tmp = {
71 .data = &range,
72 .maxlen = sizeof(range),
73 .mode = table->mode,
74 .extra1 = &ip_local_port_range_min,
75 .extra2 = &ip_local_port_range_max,
76 };
77
78 inet_get_local_port_range(net, &range[0], &range[1]);
79
80 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
81
82 if (write && ret == 0) {
83 if (range[1] < range[0])
84 ret = -EINVAL;
85 else
86 set_local_port_range(net, range);
87 }
88
89 return ret;
90 }
91
92
93 static void inet_get_ping_group_range_table(struct ctl_table *table, kgid_t *low, kgid_t *high)
94 {
95 kgid_t *data = table->data;
96 struct net *net =
97 container_of(table->data, struct net, ipv4.ping_group_range.range);
98 unsigned int seq;
99 do {
100 seq = read_seqbegin(&net->ipv4.ip_local_ports.lock);
101
102 *low = data[0];
103 *high = data[1];
104 } while (read_seqretry(&net->ipv4.ip_local_ports.lock, seq));
105 }
106
107 /* Update system visible IP port range */
108 static void set_ping_group_range(struct ctl_table *table, kgid_t low, kgid_t high)
109 {
110 kgid_t *data = table->data;
111 struct net *net =
112 container_of(table->data, struct net, ipv4.ping_group_range.range);
113 write_seqlock(&net->ipv4.ip_local_ports.lock);
114 data[0] = low;
115 data[1] = high;
116 write_sequnlock(&net->ipv4.ip_local_ports.lock);
117 }
118
119 /* Validate changes from /proc interface. */
120 static int ipv4_ping_group_range(struct ctl_table *table, int write,
121 void __user *buffer,
122 size_t *lenp, loff_t *ppos)
123 {
124 struct user_namespace *user_ns = current_user_ns();
125 int ret;
126 gid_t urange[2];
127 kgid_t low, high;
128 struct ctl_table tmp = {
129 .data = &urange,
130 .maxlen = sizeof(urange),
131 .mode = table->mode,
132 .extra1 = &ip_ping_group_range_min,
133 .extra2 = &ip_ping_group_range_max,
134 };
135
136 inet_get_ping_group_range_table(table, &low, &high);
137 urange[0] = from_kgid_munged(user_ns, low);
138 urange[1] = from_kgid_munged(user_ns, high);
139 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
140
141 if (write && ret == 0) {
142 low = make_kgid(user_ns, urange[0]);
143 high = make_kgid(user_ns, urange[1]);
144 if (!gid_valid(low) || !gid_valid(high) ||
145 (urange[1] < urange[0]) || gid_lt(high, low)) {
146 low = make_kgid(&init_user_ns, 1);
147 high = make_kgid(&init_user_ns, 0);
148 }
149 set_ping_group_range(table, low, high);
150 }
151
152 return ret;
153 }
154
155 static int proc_tcp_congestion_control(struct ctl_table *ctl, int write,
156 void __user *buffer, size_t *lenp, loff_t *ppos)
157 {
158 char val[TCP_CA_NAME_MAX];
159 struct ctl_table tbl = {
160 .data = val,
161 .maxlen = TCP_CA_NAME_MAX,
162 };
163 int ret;
164
165 tcp_get_default_congestion_control(val);
166
167 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
168 if (write && ret == 0)
169 ret = tcp_set_default_congestion_control(val);
170 return ret;
171 }
172
173 static int proc_tcp_available_congestion_control(struct ctl_table *ctl,
174 int write,
175 void __user *buffer, size_t *lenp,
176 loff_t *ppos)
177 {
178 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
179 int ret;
180
181 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
182 if (!tbl.data)
183 return -ENOMEM;
184 tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
185 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
186 kfree(tbl.data);
187 return ret;
188 }
189
190 static int proc_allowed_congestion_control(struct ctl_table *ctl,
191 int write,
192 void __user *buffer, size_t *lenp,
193 loff_t *ppos)
194 {
195 struct ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
196 int ret;
197
198 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
199 if (!tbl.data)
200 return -ENOMEM;
201
202 tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
203 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
204 if (write && ret == 0)
205 ret = tcp_set_allowed_congestion_control(tbl.data);
206 kfree(tbl.data);
207 return ret;
208 }
209
210 static int proc_tcp_fastopen_key(struct ctl_table *ctl, int write,
211 void __user *buffer, size_t *lenp,
212 loff_t *ppos)
213 {
214 struct ctl_table tbl = { .maxlen = (TCP_FASTOPEN_KEY_LENGTH * 2 + 10) };
215 struct tcp_fastopen_context *ctxt;
216 int ret;
217 u32 user_key[4]; /* 16 bytes, matching TCP_FASTOPEN_KEY_LENGTH */
218
219 tbl.data = kmalloc(tbl.maxlen, GFP_KERNEL);
220 if (!tbl.data)
221 return -ENOMEM;
222
223 rcu_read_lock();
224 ctxt = rcu_dereference(tcp_fastopen_ctx);
225 if (ctxt)
226 memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH);
227 else
228 memset(user_key, 0, sizeof(user_key));
229 rcu_read_unlock();
230
231 snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x",
232 user_key[0], user_key[1], user_key[2], user_key[3]);
233 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
234
235 if (write && ret == 0) {
236 if (sscanf(tbl.data, "%x-%x-%x-%x", user_key, user_key + 1,
237 user_key + 2, user_key + 3) != 4) {
238 ret = -EINVAL;
239 goto bad_key;
240 }
241 /* Generate a dummy secret but don't publish it. This
242 * is needed so we don't regenerate a new key on the
243 * first invocation of tcp_fastopen_cookie_gen
244 */
245 tcp_fastopen_init_key_once(false);
246 tcp_fastopen_reset_cipher(user_key, TCP_FASTOPEN_KEY_LENGTH);
247 }
248
249 bad_key:
250 pr_debug("proc FO key set 0x%x-%x-%x-%x <- 0x%s: %u\n",
251 user_key[0], user_key[1], user_key[2], user_key[3],
252 (char *)tbl.data, ret);
253 kfree(tbl.data);
254 return ret;
255 }
256
257 static struct ctl_table ipv4_table[] = {
258 {
259 .procname = "tcp_timestamps",
260 .data = &sysctl_tcp_timestamps,
261 .maxlen = sizeof(int),
262 .mode = 0644,
263 .proc_handler = proc_dointvec
264 },
265 {
266 .procname = "tcp_window_scaling",
267 .data = &sysctl_tcp_window_scaling,
268 .maxlen = sizeof(int),
269 .mode = 0644,
270 .proc_handler = proc_dointvec
271 },
272 {
273 .procname = "tcp_sack",
274 .data = &sysctl_tcp_sack,
275 .maxlen = sizeof(int),
276 .mode = 0644,
277 .proc_handler = proc_dointvec
278 },
279 {
280 .procname = "tcp_retrans_collapse",
281 .data = &sysctl_tcp_retrans_collapse,
282 .maxlen = sizeof(int),
283 .mode = 0644,
284 .proc_handler = proc_dointvec
285 },
286 {
287 .procname = "ip_default_ttl",
288 .data = &sysctl_ip_default_ttl,
289 .maxlen = sizeof(int),
290 .mode = 0644,
291 .proc_handler = proc_dointvec_minmax,
292 .extra1 = &ip_ttl_min,
293 .extra2 = &ip_ttl_max,
294 },
295 {
296 .procname = "tcp_syn_retries",
297 .data = &sysctl_tcp_syn_retries,
298 .maxlen = sizeof(int),
299 .mode = 0644,
300 .proc_handler = proc_dointvec_minmax,
301 .extra1 = &tcp_syn_retries_min,
302 .extra2 = &tcp_syn_retries_max
303 },
304 {
305 .procname = "tcp_synack_retries",
306 .data = &sysctl_tcp_synack_retries,
307 .maxlen = sizeof(int),
308 .mode = 0644,
309 .proc_handler = proc_dointvec
310 },
311 {
312 .procname = "tcp_max_orphans",
313 .data = &sysctl_tcp_max_orphans,
314 .maxlen = sizeof(int),
315 .mode = 0644,
316 .proc_handler = proc_dointvec
317 },
318 {
319 .procname = "tcp_max_tw_buckets",
320 .data = &tcp_death_row.sysctl_max_tw_buckets,
321 .maxlen = sizeof(int),
322 .mode = 0644,
323 .proc_handler = proc_dointvec
324 },
325 {
326 .procname = "ip_early_demux",
327 .data = &sysctl_ip_early_demux,
328 .maxlen = sizeof(int),
329 .mode = 0644,
330 .proc_handler = proc_dointvec
331 },
332 {
333 .procname = "ip_dynaddr",
334 .data = &sysctl_ip_dynaddr,
335 .maxlen = sizeof(int),
336 .mode = 0644,
337 .proc_handler = proc_dointvec
338 },
339 {
340 .procname = "tcp_retries1",
341 .data = &sysctl_tcp_retries1,
342 .maxlen = sizeof(int),
343 .mode = 0644,
344 .proc_handler = proc_dointvec_minmax,
345 .extra2 = &tcp_retr1_max
346 },
347 {
348 .procname = "tcp_retries2",
349 .data = &sysctl_tcp_retries2,
350 .maxlen = sizeof(int),
351 .mode = 0644,
352 .proc_handler = proc_dointvec
353 },
354 {
355 .procname = "tcp_fin_timeout",
356 .data = &sysctl_tcp_fin_timeout,
357 .maxlen = sizeof(int),
358 .mode = 0644,
359 .proc_handler = proc_dointvec_jiffies,
360 },
361 #ifdef CONFIG_SYN_COOKIES
362 {
363 .procname = "tcp_syncookies",
364 .data = &sysctl_tcp_syncookies,
365 .maxlen = sizeof(int),
366 .mode = 0644,
367 .proc_handler = proc_dointvec
368 },
369 #endif
370 {
371 .procname = "tcp_fastopen",
372 .data = &sysctl_tcp_fastopen,
373 .maxlen = sizeof(int),
374 .mode = 0644,
375 .proc_handler = proc_dointvec,
376 },
377 {
378 .procname = "tcp_fastopen_key",
379 .mode = 0600,
380 .maxlen = ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10),
381 .proc_handler = proc_tcp_fastopen_key,
382 },
383 {
384 .procname = "tcp_tw_recycle",
385 .data = &tcp_death_row.sysctl_tw_recycle,
386 .maxlen = sizeof(int),
387 .mode = 0644,
388 .proc_handler = proc_dointvec
389 },
390 {
391 .procname = "tcp_abort_on_overflow",
392 .data = &sysctl_tcp_abort_on_overflow,
393 .maxlen = sizeof(int),
394 .mode = 0644,
395 .proc_handler = proc_dointvec
396 },
397 {
398 .procname = "tcp_stdurg",
399 .data = &sysctl_tcp_stdurg,
400 .maxlen = sizeof(int),
401 .mode = 0644,
402 .proc_handler = proc_dointvec
403 },
404 {
405 .procname = "tcp_rfc1337",
406 .data = &sysctl_tcp_rfc1337,
407 .maxlen = sizeof(int),
408 .mode = 0644,
409 .proc_handler = proc_dointvec
410 },
411 {
412 .procname = "tcp_max_syn_backlog",
413 .data = &sysctl_max_syn_backlog,
414 .maxlen = sizeof(int),
415 .mode = 0644,
416 .proc_handler = proc_dointvec
417 },
418 {
419 .procname = "igmp_max_memberships",
420 .data = &sysctl_igmp_max_memberships,
421 .maxlen = sizeof(int),
422 .mode = 0644,
423 .proc_handler = proc_dointvec
424 },
425 {
426 .procname = "igmp_max_msf",
427 .data = &sysctl_igmp_max_msf,
428 .maxlen = sizeof(int),
429 .mode = 0644,
430 .proc_handler = proc_dointvec
431 },
432 #ifdef CONFIG_IP_MULTICAST
433 {
434 .procname = "igmp_qrv",
435 .data = &sysctl_igmp_qrv,
436 .maxlen = sizeof(int),
437 .mode = 0644,
438 .proc_handler = proc_dointvec_minmax,
439 .extra1 = &one
440 },
441 #endif
442 {
443 .procname = "inet_peer_threshold",
444 .data = &inet_peer_threshold,
445 .maxlen = sizeof(int),
446 .mode = 0644,
447 .proc_handler = proc_dointvec
448 },
449 {
450 .procname = "inet_peer_minttl",
451 .data = &inet_peer_minttl,
452 .maxlen = sizeof(int),
453 .mode = 0644,
454 .proc_handler = proc_dointvec_jiffies,
455 },
456 {
457 .procname = "inet_peer_maxttl",
458 .data = &inet_peer_maxttl,
459 .maxlen = sizeof(int),
460 .mode = 0644,
461 .proc_handler = proc_dointvec_jiffies,
462 },
463 {
464 .procname = "tcp_orphan_retries",
465 .data = &sysctl_tcp_orphan_retries,
466 .maxlen = sizeof(int),
467 .mode = 0644,
468 .proc_handler = proc_dointvec
469 },
470 {
471 .procname = "tcp_fack",
472 .data = &sysctl_tcp_fack,
473 .maxlen = sizeof(int),
474 .mode = 0644,
475 .proc_handler = proc_dointvec
476 },
477 {
478 .procname = "tcp_recovery",
479 .data = &sysctl_tcp_recovery,
480 .maxlen = sizeof(int),
481 .mode = 0644,
482 .proc_handler = proc_dointvec,
483 },
484 {
485 .procname = "tcp_reordering",
486 .data = &sysctl_tcp_reordering,
487 .maxlen = sizeof(int),
488 .mode = 0644,
489 .proc_handler = proc_dointvec
490 },
491 {
492 .procname = "tcp_max_reordering",
493 .data = &sysctl_tcp_max_reordering,
494 .maxlen = sizeof(int),
495 .mode = 0644,
496 .proc_handler = proc_dointvec
497 },
498 {
499 .procname = "tcp_dsack",
500 .data = &sysctl_tcp_dsack,
501 .maxlen = sizeof(int),
502 .mode = 0644,
503 .proc_handler = proc_dointvec
504 },
505 {
506 .procname = "tcp_mem",
507 .maxlen = sizeof(sysctl_tcp_mem),
508 .data = &sysctl_tcp_mem,
509 .mode = 0644,
510 .proc_handler = proc_doulongvec_minmax,
511 },
512 {
513 .procname = "tcp_wmem",
514 .data = &sysctl_tcp_wmem,
515 .maxlen = sizeof(sysctl_tcp_wmem),
516 .mode = 0644,
517 .proc_handler = proc_dointvec_minmax,
518 .extra1 = &one,
519 },
520 {
521 .procname = "tcp_notsent_lowat",
522 .data = &sysctl_tcp_notsent_lowat,
523 .maxlen = sizeof(sysctl_tcp_notsent_lowat),
524 .mode = 0644,
525 .proc_handler = proc_dointvec,
526 },
527 {
528 .procname = "tcp_rmem",
529 .data = &sysctl_tcp_rmem,
530 .maxlen = sizeof(sysctl_tcp_rmem),
531 .mode = 0644,
532 .proc_handler = proc_dointvec_minmax,
533 .extra1 = &one,
534 },
535 {
536 .procname = "tcp_app_win",
537 .data = &sysctl_tcp_app_win,
538 .maxlen = sizeof(int),
539 .mode = 0644,
540 .proc_handler = proc_dointvec
541 },
542 {
543 .procname = "tcp_adv_win_scale",
544 .data = &sysctl_tcp_adv_win_scale,
545 .maxlen = sizeof(int),
546 .mode = 0644,
547 .proc_handler = proc_dointvec_minmax,
548 .extra1 = &tcp_adv_win_scale_min,
549 .extra2 = &tcp_adv_win_scale_max,
550 },
551 {
552 .procname = "tcp_tw_reuse",
553 .data = &sysctl_tcp_tw_reuse,
554 .maxlen = sizeof(int),
555 .mode = 0644,
556 .proc_handler = proc_dointvec
557 },
558 {
559 .procname = "tcp_frto",
560 .data = &sysctl_tcp_frto,
561 .maxlen = sizeof(int),
562 .mode = 0644,
563 .proc_handler = proc_dointvec
564 },
565 {
566 .procname = "tcp_min_rtt_wlen",
567 .data = &sysctl_tcp_min_rtt_wlen,
568 .maxlen = sizeof(int),
569 .mode = 0644,
570 .proc_handler = proc_dointvec
571 },
572 {
573 .procname = "tcp_low_latency",
574 .data = &sysctl_tcp_low_latency,
575 .maxlen = sizeof(int),
576 .mode = 0644,
577 .proc_handler = proc_dointvec
578 },
579 {
580 .procname = "tcp_no_metrics_save",
581 .data = &sysctl_tcp_nometrics_save,
582 .maxlen = sizeof(int),
583 .mode = 0644,
584 .proc_handler = proc_dointvec,
585 },
586 {
587 .procname = "tcp_moderate_rcvbuf",
588 .data = &sysctl_tcp_moderate_rcvbuf,
589 .maxlen = sizeof(int),
590 .mode = 0644,
591 .proc_handler = proc_dointvec,
592 },
593 {
594 .procname = "tcp_tso_win_divisor",
595 .data = &sysctl_tcp_tso_win_divisor,
596 .maxlen = sizeof(int),
597 .mode = 0644,
598 .proc_handler = proc_dointvec,
599 },
600 {
601 .procname = "tcp_congestion_control",
602 .mode = 0644,
603 .maxlen = TCP_CA_NAME_MAX,
604 .proc_handler = proc_tcp_congestion_control,
605 },
606 {
607 .procname = "tcp_workaround_signed_windows",
608 .data = &sysctl_tcp_workaround_signed_windows,
609 .maxlen = sizeof(int),
610 .mode = 0644,
611 .proc_handler = proc_dointvec
612 },
613 {
614 .procname = "tcp_limit_output_bytes",
615 .data = &sysctl_tcp_limit_output_bytes,
616 .maxlen = sizeof(int),
617 .mode = 0644,
618 .proc_handler = proc_dointvec
619 },
620 {
621 .procname = "tcp_challenge_ack_limit",
622 .data = &sysctl_tcp_challenge_ack_limit,
623 .maxlen = sizeof(int),
624 .mode = 0644,
625 .proc_handler = proc_dointvec
626 },
627 {
628 .procname = "tcp_slow_start_after_idle",
629 .data = &sysctl_tcp_slow_start_after_idle,
630 .maxlen = sizeof(int),
631 .mode = 0644,
632 .proc_handler = proc_dointvec
633 },
634 #ifdef CONFIG_NETLABEL
635 {
636 .procname = "cipso_cache_enable",
637 .data = &cipso_v4_cache_enabled,
638 .maxlen = sizeof(int),
639 .mode = 0644,
640 .proc_handler = proc_dointvec,
641 },
642 {
643 .procname = "cipso_cache_bucket_size",
644 .data = &cipso_v4_cache_bucketsize,
645 .maxlen = sizeof(int),
646 .mode = 0644,
647 .proc_handler = proc_dointvec,
648 },
649 {
650 .procname = "cipso_rbm_optfmt",
651 .data = &cipso_v4_rbm_optfmt,
652 .maxlen = sizeof(int),
653 .mode = 0644,
654 .proc_handler = proc_dointvec,
655 },
656 {
657 .procname = "cipso_rbm_strictvalid",
658 .data = &cipso_v4_rbm_strictvalid,
659 .maxlen = sizeof(int),
660 .mode = 0644,
661 .proc_handler = proc_dointvec,
662 },
663 #endif /* CONFIG_NETLABEL */
664 {
665 .procname = "tcp_available_congestion_control",
666 .maxlen = TCP_CA_BUF_MAX,
667 .mode = 0444,
668 .proc_handler = proc_tcp_available_congestion_control,
669 },
670 {
671 .procname = "tcp_allowed_congestion_control",
672 .maxlen = TCP_CA_BUF_MAX,
673 .mode = 0644,
674 .proc_handler = proc_allowed_congestion_control,
675 },
676 {
677 .procname = "tcp_thin_linear_timeouts",
678 .data = &sysctl_tcp_thin_linear_timeouts,
679 .maxlen = sizeof(int),
680 .mode = 0644,
681 .proc_handler = proc_dointvec
682 },
683 {
684 .procname = "tcp_thin_dupack",
685 .data = &sysctl_tcp_thin_dupack,
686 .maxlen = sizeof(int),
687 .mode = 0644,
688 .proc_handler = proc_dointvec
689 },
690 {
691 .procname = "tcp_early_retrans",
692 .data = &sysctl_tcp_early_retrans,
693 .maxlen = sizeof(int),
694 .mode = 0644,
695 .proc_handler = proc_dointvec_minmax,
696 .extra1 = &zero,
697 .extra2 = &four,
698 },
699 {
700 .procname = "tcp_min_tso_segs",
701 .data = &sysctl_tcp_min_tso_segs,
702 .maxlen = sizeof(int),
703 .mode = 0644,
704 .proc_handler = proc_dointvec_minmax,
705 .extra1 = &one,
706 .extra2 = &gso_max_segs,
707 },
708 {
709 .procname = "tcp_pacing_ss_ratio",
710 .data = &sysctl_tcp_pacing_ss_ratio,
711 .maxlen = sizeof(int),
712 .mode = 0644,
713 .proc_handler = proc_dointvec_minmax,
714 .extra1 = &zero,
715 .extra2 = &thousand,
716 },
717 {
718 .procname = "tcp_pacing_ca_ratio",
719 .data = &sysctl_tcp_pacing_ca_ratio,
720 .maxlen = sizeof(int),
721 .mode = 0644,
722 .proc_handler = proc_dointvec_minmax,
723 .extra1 = &zero,
724 .extra2 = &thousand,
725 },
726 {
727 .procname = "tcp_autocorking",
728 .data = &sysctl_tcp_autocorking,
729 .maxlen = sizeof(int),
730 .mode = 0644,
731 .proc_handler = proc_dointvec_minmax,
732 .extra1 = &zero,
733 .extra2 = &one,
734 },
735 {
736 .procname = "tcp_invalid_ratelimit",
737 .data = &sysctl_tcp_invalid_ratelimit,
738 .maxlen = sizeof(int),
739 .mode = 0644,
740 .proc_handler = proc_dointvec_ms_jiffies,
741 },
742 {
743 .procname = "icmp_msgs_per_sec",
744 .data = &sysctl_icmp_msgs_per_sec,
745 .maxlen = sizeof(int),
746 .mode = 0644,
747 .proc_handler = proc_dointvec_minmax,
748 .extra1 = &zero,
749 },
750 {
751 .procname = "icmp_msgs_burst",
752 .data = &sysctl_icmp_msgs_burst,
753 .maxlen = sizeof(int),
754 .mode = 0644,
755 .proc_handler = proc_dointvec_minmax,
756 .extra1 = &zero,
757 },
758 {
759 .procname = "udp_mem",
760 .data = &sysctl_udp_mem,
761 .maxlen = sizeof(sysctl_udp_mem),
762 .mode = 0644,
763 .proc_handler = proc_doulongvec_minmax,
764 },
765 {
766 .procname = "udp_rmem_min",
767 .data = &sysctl_udp_rmem_min,
768 .maxlen = sizeof(sysctl_udp_rmem_min),
769 .mode = 0644,
770 .proc_handler = proc_dointvec_minmax,
771 .extra1 = &one
772 },
773 {
774 .procname = "udp_wmem_min",
775 .data = &sysctl_udp_wmem_min,
776 .maxlen = sizeof(sysctl_udp_wmem_min),
777 .mode = 0644,
778 .proc_handler = proc_dointvec_minmax,
779 .extra1 = &one
780 },
781 { }
782 };
783
784 static struct ctl_table ipv4_net_table[] = {
785 {
786 .procname = "icmp_echo_ignore_all",
787 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
788 .maxlen = sizeof(int),
789 .mode = 0644,
790 .proc_handler = proc_dointvec
791 },
792 {
793 .procname = "icmp_echo_ignore_broadcasts",
794 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
795 .maxlen = sizeof(int),
796 .mode = 0644,
797 .proc_handler = proc_dointvec
798 },
799 {
800 .procname = "icmp_ignore_bogus_error_responses",
801 .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
802 .maxlen = sizeof(int),
803 .mode = 0644,
804 .proc_handler = proc_dointvec
805 },
806 {
807 .procname = "icmp_errors_use_inbound_ifaddr",
808 .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
809 .maxlen = sizeof(int),
810 .mode = 0644,
811 .proc_handler = proc_dointvec
812 },
813 {
814 .procname = "icmp_ratelimit",
815 .data = &init_net.ipv4.sysctl_icmp_ratelimit,
816 .maxlen = sizeof(int),
817 .mode = 0644,
818 .proc_handler = proc_dointvec_ms_jiffies,
819 },
820 {
821 .procname = "icmp_ratemask",
822 .data = &init_net.ipv4.sysctl_icmp_ratemask,
823 .maxlen = sizeof(int),
824 .mode = 0644,
825 .proc_handler = proc_dointvec
826 },
827 {
828 .procname = "ping_group_range",
829 .data = &init_net.ipv4.ping_group_range.range,
830 .maxlen = sizeof(gid_t)*2,
831 .mode = 0644,
832 .proc_handler = ipv4_ping_group_range,
833 },
834 {
835 .procname = "tcp_ecn",
836 .data = &init_net.ipv4.sysctl_tcp_ecn,
837 .maxlen = sizeof(int),
838 .mode = 0644,
839 .proc_handler = proc_dointvec
840 },
841 {
842 .procname = "tcp_ecn_fallback",
843 .data = &init_net.ipv4.sysctl_tcp_ecn_fallback,
844 .maxlen = sizeof(int),
845 .mode = 0644,
846 .proc_handler = proc_dointvec
847 },
848 {
849 .procname = "ip_local_port_range",
850 .maxlen = sizeof(init_net.ipv4.ip_local_ports.range),
851 .data = &init_net.ipv4.ip_local_ports.range,
852 .mode = 0644,
853 .proc_handler = ipv4_local_port_range,
854 },
855 {
856 .procname = "ip_local_reserved_ports",
857 .data = &init_net.ipv4.sysctl_local_reserved_ports,
858 .maxlen = 65536,
859 .mode = 0644,
860 .proc_handler = proc_do_large_bitmap,
861 },
862 {
863 .procname = "ip_no_pmtu_disc",
864 .data = &init_net.ipv4.sysctl_ip_no_pmtu_disc,
865 .maxlen = sizeof(int),
866 .mode = 0644,
867 .proc_handler = proc_dointvec
868 },
869 {
870 .procname = "ip_forward_use_pmtu",
871 .data = &init_net.ipv4.sysctl_ip_fwd_use_pmtu,
872 .maxlen = sizeof(int),
873 .mode = 0644,
874 .proc_handler = proc_dointvec,
875 },
876 {
877 .procname = "ip_nonlocal_bind",
878 .data = &init_net.ipv4.sysctl_ip_nonlocal_bind,
879 .maxlen = sizeof(int),
880 .mode = 0644,
881 .proc_handler = proc_dointvec
882 },
883 {
884 .procname = "fwmark_reflect",
885 .data = &init_net.ipv4.sysctl_fwmark_reflect,
886 .maxlen = sizeof(int),
887 .mode = 0644,
888 .proc_handler = proc_dointvec,
889 },
890 {
891 .procname = "tcp_fwmark_accept",
892 .data = &init_net.ipv4.sysctl_tcp_fwmark_accept,
893 .maxlen = sizeof(int),
894 .mode = 0644,
895 .proc_handler = proc_dointvec,
896 },
897 #ifdef CONFIG_NET_L3_MASTER_DEV
898 {
899 .procname = "tcp_l3mdev_accept",
900 .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept,
901 .maxlen = sizeof(int),
902 .mode = 0644,
903 .proc_handler = proc_dointvec_minmax,
904 .extra1 = &zero,
905 .extra2 = &one,
906 },
907 #endif
908 {
909 .procname = "tcp_mtu_probing",
910 .data = &init_net.ipv4.sysctl_tcp_mtu_probing,
911 .maxlen = sizeof(int),
912 .mode = 0644,
913 .proc_handler = proc_dointvec,
914 },
915 {
916 .procname = "tcp_base_mss",
917 .data = &init_net.ipv4.sysctl_tcp_base_mss,
918 .maxlen = sizeof(int),
919 .mode = 0644,
920 .proc_handler = proc_dointvec,
921 },
922 {
923 .procname = "tcp_probe_threshold",
924 .data = &init_net.ipv4.sysctl_tcp_probe_threshold,
925 .maxlen = sizeof(int),
926 .mode = 0644,
927 .proc_handler = proc_dointvec,
928 },
929 {
930 .procname = "tcp_probe_interval",
931 .data = &init_net.ipv4.sysctl_tcp_probe_interval,
932 .maxlen = sizeof(int),
933 .mode = 0644,
934 .proc_handler = proc_dointvec,
935 },
936 {
937 .procname = "igmp_link_local_mcast_reports",
938 .data = &sysctl_igmp_llm_reports,
939 .maxlen = sizeof(int),
940 .mode = 0644,
941 .proc_handler = proc_dointvec
942 },
943 {
944 .procname = "tcp_keepalive_time",
945 .data = &init_net.ipv4.sysctl_tcp_keepalive_time,
946 .maxlen = sizeof(int),
947 .mode = 0644,
948 .proc_handler = proc_dointvec_jiffies,
949 },
950 {
951 .procname = "tcp_keepalive_probes",
952 .data = &init_net.ipv4.sysctl_tcp_keepalive_probes,
953 .maxlen = sizeof(int),
954 .mode = 0644,
955 .proc_handler = proc_dointvec
956 },
957 {
958 .procname = "tcp_keepalive_intvl",
959 .data = &init_net.ipv4.sysctl_tcp_keepalive_intvl,
960 .maxlen = sizeof(int),
961 .mode = 0644,
962 .proc_handler = proc_dointvec_jiffies,
963 },
964 { }
965 };
966
967 static __net_init int ipv4_sysctl_init_net(struct net *net)
968 {
969 struct ctl_table *table;
970
971 table = ipv4_net_table;
972 if (!net_eq(net, &init_net)) {
973 int i;
974
975 table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
976 if (!table)
977 goto err_alloc;
978
979 /* Update the variables to point into the current struct net */
980 for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++)
981 table[i].data += (void *)net - (void *)&init_net;
982 }
983
984 net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table);
985 if (!net->ipv4.ipv4_hdr)
986 goto err_reg;
987
988 net->ipv4.sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
989 if (!net->ipv4.sysctl_local_reserved_ports)
990 goto err_ports;
991
992 return 0;
993
994 err_ports:
995 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
996 err_reg:
997 if (!net_eq(net, &init_net))
998 kfree(table);
999 err_alloc:
1000 return -ENOMEM;
1001 }
1002
1003 static __net_exit void ipv4_sysctl_exit_net(struct net *net)
1004 {
1005 struct ctl_table *table;
1006
1007 kfree(net->ipv4.sysctl_local_reserved_ports);
1008 table = net->ipv4.ipv4_hdr->ctl_table_arg;
1009 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
1010 kfree(table);
1011 }
1012
1013 static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
1014 .init = ipv4_sysctl_init_net,
1015 .exit = ipv4_sysctl_exit_net,
1016 };
1017
1018 static __init int sysctl_ipv4_init(void)
1019 {
1020 struct ctl_table_header *hdr;
1021
1022 hdr = register_net_sysctl(&init_net, "net/ipv4", ipv4_table);
1023 if (!hdr)
1024 return -ENOMEM;
1025
1026 if (register_pernet_subsys(&ipv4_sysctl_ops)) {
1027 unregister_net_sysctl_table(hdr);
1028 return -ENOMEM;
1029 }
1030
1031 return 0;
1032 }
1033
1034 __initcall(sysctl_ipv4_init);
Linux kernel - Deliverables
This page took 0.052396 seconds and 6 git commands to generate.