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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 <net/snmp.h>
18#include <net/icmp.h>
19#include <net/ip.h>
20#include <net/route.h>
21#include <net/tcp.h>
22#include <net/udp.h>
23#include <net/cipso_ipv4.h>
24#include <net/inet_frag.h>
25#include <net/ping.h>
26
27static int zero;
28static int tcp_retr1_max = 255;
29static int ip_local_port_range_min[] = { 1, 1 };
30static int ip_local_port_range_max[] = { 65535, 65535 };
31static int tcp_adv_win_scale_min = -31;
32static int tcp_adv_win_scale_max = 31;
33static int ip_ttl_min = 1;
34static int ip_ttl_max = 255;
35static int ip_ping_group_range_min[] = { 0, 0 };
36static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
37
38
39static void set_local_port_range(int range[2])
40{
41 write_seqlock(&sysctl_local_ports.lock);
42 sysctl_local_ports.range[0] = range[0];
43 sysctl_local_ports.range[1] = range[1];
44 write_sequnlock(&sysctl_local_ports.lock);
45}
46
47
48static int ipv4_local_port_range(ctl_table *table, int write,
49 void __user *buffer,
50 size_t *lenp, loff_t *ppos)
51{
52 int ret;
53 int range[2];
54 ctl_table tmp = {
55 .data = &range,
56 .maxlen = sizeof(range),
57 .mode = table->mode,
58 .extra1 = &ip_local_port_range_min,
59 .extra2 = &ip_local_port_range_max,
60 };
61
62 inet_get_local_port_range(range, range + 1);
63 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
64
65 if (write && ret == 0) {
66 if (range[1] < range[0])
67 ret = -EINVAL;
68 else
69 set_local_port_range(range);
70 }
71
72 return ret;
73}
74
75
76void inet_get_ping_group_range_table(struct ctl_table *table, gid_t *low, gid_t *high)
77{
78 gid_t *data = table->data;
79 unsigned seq;
80 do {
81 seq = read_seqbegin(&sysctl_local_ports.lock);
82
83 *low = data[0];
84 *high = data[1];
85 } while (read_seqretry(&sysctl_local_ports.lock, seq));
86}
87
88
89static void set_ping_group_range(struct ctl_table *table, int range[2])
90{
91 gid_t *data = table->data;
92 write_seqlock(&sysctl_local_ports.lock);
93 data[0] = range[0];
94 data[1] = range[1];
95 write_sequnlock(&sysctl_local_ports.lock);
96}
97
98
99static int ipv4_ping_group_range(ctl_table *table, int write,
100 void __user *buffer,
101 size_t *lenp, loff_t *ppos)
102{
103 int ret;
104 gid_t range[2];
105 ctl_table tmp = {
106 .data = &range,
107 .maxlen = sizeof(range),
108 .mode = table->mode,
109 .extra1 = &ip_ping_group_range_min,
110 .extra2 = &ip_ping_group_range_max,
111 };
112
113 inet_get_ping_group_range_table(table, range, range + 1);
114 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
115
116 if (write && ret == 0)
117 set_ping_group_range(table, range);
118
119 return ret;
120}
121
122static int proc_tcp_congestion_control(ctl_table *ctl, int write,
123 void __user *buffer, size_t *lenp, loff_t *ppos)
124{
125 char val[TCP_CA_NAME_MAX];
126 ctl_table tbl = {
127 .data = val,
128 .maxlen = TCP_CA_NAME_MAX,
129 };
130 int ret;
131
132 tcp_get_default_congestion_control(val);
133
134 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
135 if (write && ret == 0)
136 ret = tcp_set_default_congestion_control(val);
137 return ret;
138}
139
140static int proc_tcp_available_congestion_control(ctl_table *ctl,
141 int write,
142 void __user *buffer, size_t *lenp,
143 loff_t *ppos)
144{
145 ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
146 int ret;
147
148 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
149 if (!tbl.data)
150 return -ENOMEM;
151 tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
152 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
153 kfree(tbl.data);
154 return ret;
155}
156
157static int proc_allowed_congestion_control(ctl_table *ctl,
158 int write,
159 void __user *buffer, size_t *lenp,
160 loff_t *ppos)
161{
162 ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
163 int ret;
164
165 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
166 if (!tbl.data)
167 return -ENOMEM;
168
169 tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
170 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
171 if (write && ret == 0)
172 ret = tcp_set_allowed_congestion_control(tbl.data);
173 kfree(tbl.data);
174 return ret;
175}
176
177static struct ctl_table ipv4_table[] = {
178 {
179 .procname = "tcp_timestamps",
180 .data = &sysctl_tcp_timestamps,
181 .maxlen = sizeof(int),
182 .mode = 0644,
183 .proc_handler = proc_dointvec
184 },
185 {
186 .procname = "tcp_window_scaling",
187 .data = &sysctl_tcp_window_scaling,
188 .maxlen = sizeof(int),
189 .mode = 0644,
190 .proc_handler = proc_dointvec
191 },
192 {
193 .procname = "tcp_sack",
194 .data = &sysctl_tcp_sack,
195 .maxlen = sizeof(int),
196 .mode = 0644,
197 .proc_handler = proc_dointvec
198 },
199 {
200 .procname = "tcp_retrans_collapse",
201 .data = &sysctl_tcp_retrans_collapse,
202 .maxlen = sizeof(int),
203 .mode = 0644,
204 .proc_handler = proc_dointvec
205 },
206 {
207 .procname = "ip_default_ttl",
208 .data = &sysctl_ip_default_ttl,
209 .maxlen = sizeof(int),
210 .mode = 0644,
211 .proc_handler = proc_dointvec_minmax,
212 .extra1 = &ip_ttl_min,
213 .extra2 = &ip_ttl_max,
214 },
215 {
216 .procname = "ip_no_pmtu_disc",
217 .data = &ipv4_config.no_pmtu_disc,
218 .maxlen = sizeof(int),
219 .mode = 0644,
220 .proc_handler = proc_dointvec
221 },
222 {
223 .procname = "ip_nonlocal_bind",
224 .data = &sysctl_ip_nonlocal_bind,
225 .maxlen = sizeof(int),
226 .mode = 0644,
227 .proc_handler = proc_dointvec
228 },
229 {
230 .procname = "tcp_syn_retries",
231 .data = &sysctl_tcp_syn_retries,
232 .maxlen = sizeof(int),
233 .mode = 0644,
234 .proc_handler = proc_dointvec
235 },
236 {
237 .procname = "tcp_synack_retries",
238 .data = &sysctl_tcp_synack_retries,
239 .maxlen = sizeof(int),
240 .mode = 0644,
241 .proc_handler = proc_dointvec
242 },
243 {
244 .procname = "tcp_max_orphans",
245 .data = &sysctl_tcp_max_orphans,
246 .maxlen = sizeof(int),
247 .mode = 0644,
248 .proc_handler = proc_dointvec
249 },
250 {
251 .procname = "tcp_max_tw_buckets",
252 .data = &tcp_death_row.sysctl_max_tw_buckets,
253 .maxlen = sizeof(int),
254 .mode = 0644,
255 .proc_handler = proc_dointvec
256 },
257 {
258 .procname = "ip_dynaddr",
259 .data = &sysctl_ip_dynaddr,
260 .maxlen = sizeof(int),
261 .mode = 0644,
262 .proc_handler = proc_dointvec
263 },
264 {
265 .procname = "tcp_keepalive_time",
266 .data = &sysctl_tcp_keepalive_time,
267 .maxlen = sizeof(int),
268 .mode = 0644,
269 .proc_handler = proc_dointvec_jiffies,
270 },
271 {
272 .procname = "tcp_keepalive_probes",
273 .data = &sysctl_tcp_keepalive_probes,
274 .maxlen = sizeof(int),
275 .mode = 0644,
276 .proc_handler = proc_dointvec
277 },
278 {
279 .procname = "tcp_keepalive_intvl",
280 .data = &sysctl_tcp_keepalive_intvl,
281 .maxlen = sizeof(int),
282 .mode = 0644,
283 .proc_handler = proc_dointvec_jiffies,
284 },
285 {
286 .procname = "tcp_retries1",
287 .data = &sysctl_tcp_retries1,
288 .maxlen = sizeof(int),
289 .mode = 0644,
290 .proc_handler = proc_dointvec_minmax,
291 .extra2 = &tcp_retr1_max
292 },
293 {
294 .procname = "tcp_retries2",
295 .data = &sysctl_tcp_retries2,
296 .maxlen = sizeof(int),
297 .mode = 0644,
298 .proc_handler = proc_dointvec
299 },
300 {
301 .procname = "tcp_fin_timeout",
302 .data = &sysctl_tcp_fin_timeout,
303 .maxlen = sizeof(int),
304 .mode = 0644,
305 .proc_handler = proc_dointvec_jiffies,
306 },
307#ifdef CONFIG_SYN_COOKIES
308 {
309 .procname = "tcp_syncookies",
310 .data = &sysctl_tcp_syncookies,
311 .maxlen = sizeof(int),
312 .mode = 0644,
313 .proc_handler = proc_dointvec
314 },
315#endif
316 {
317 .procname = "tcp_tw_recycle",
318 .data = &tcp_death_row.sysctl_tw_recycle,
319 .maxlen = sizeof(int),
320 .mode = 0644,
321 .proc_handler = proc_dointvec
322 },
323 {
324 .procname = "tcp_abort_on_overflow",
325 .data = &sysctl_tcp_abort_on_overflow,
326 .maxlen = sizeof(int),
327 .mode = 0644,
328 .proc_handler = proc_dointvec
329 },
330 {
331 .procname = "tcp_stdurg",
332 .data = &sysctl_tcp_stdurg,
333 .maxlen = sizeof(int),
334 .mode = 0644,
335 .proc_handler = proc_dointvec
336 },
337 {
338 .procname = "tcp_rfc1337",
339 .data = &sysctl_tcp_rfc1337,
340 .maxlen = sizeof(int),
341 .mode = 0644,
342 .proc_handler = proc_dointvec
343 },
344 {
345 .procname = "tcp_max_syn_backlog",
346 .data = &sysctl_max_syn_backlog,
347 .maxlen = sizeof(int),
348 .mode = 0644,
349 .proc_handler = proc_dointvec
350 },
351 {
352 .procname = "ip_local_port_range",
353 .data = &sysctl_local_ports.range,
354 .maxlen = sizeof(sysctl_local_ports.range),
355 .mode = 0644,
356 .proc_handler = ipv4_local_port_range,
357 },
358 {
359 .procname = "ip_local_reserved_ports",
360 .data = NULL,
361 .maxlen = 65536,
362 .mode = 0644,
363 .proc_handler = proc_do_large_bitmap,
364 },
365 {
366 .procname = "igmp_max_memberships",
367 .data = &sysctl_igmp_max_memberships,
368 .maxlen = sizeof(int),
369 .mode = 0644,
370 .proc_handler = proc_dointvec
371 },
372 {
373 .procname = "igmp_max_msf",
374 .data = &sysctl_igmp_max_msf,
375 .maxlen = sizeof(int),
376 .mode = 0644,
377 .proc_handler = proc_dointvec
378 },
379 {
380 .procname = "inet_peer_threshold",
381 .data = &inet_peer_threshold,
382 .maxlen = sizeof(int),
383 .mode = 0644,
384 .proc_handler = proc_dointvec
385 },
386 {
387 .procname = "inet_peer_minttl",
388 .data = &inet_peer_minttl,
389 .maxlen = sizeof(int),
390 .mode = 0644,
391 .proc_handler = proc_dointvec_jiffies,
392 },
393 {
394 .procname = "inet_peer_maxttl",
395 .data = &inet_peer_maxttl,
396 .maxlen = sizeof(int),
397 .mode = 0644,
398 .proc_handler = proc_dointvec_jiffies,
399 },
400 {
401 .procname = "inet_peer_gc_mintime",
402 .data = &inet_peer_gc_mintime,
403 .maxlen = sizeof(int),
404 .mode = 0644,
405 .proc_handler = proc_dointvec_jiffies,
406 },
407 {
408 .procname = "inet_peer_gc_maxtime",
409 .data = &inet_peer_gc_maxtime,
410 .maxlen = sizeof(int),
411 .mode = 0644,
412 .proc_handler = proc_dointvec_jiffies,
413 },
414 {
415 .procname = "tcp_orphan_retries",
416 .data = &sysctl_tcp_orphan_retries,
417 .maxlen = sizeof(int),
418 .mode = 0644,
419 .proc_handler = proc_dointvec
420 },
421 {
422 .procname = "tcp_fack",
423 .data = &sysctl_tcp_fack,
424 .maxlen = sizeof(int),
425 .mode = 0644,
426 .proc_handler = proc_dointvec
427 },
428 {
429 .procname = "tcp_reordering",
430 .data = &sysctl_tcp_reordering,
431 .maxlen = sizeof(int),
432 .mode = 0644,
433 .proc_handler = proc_dointvec
434 },
435 {
436 .procname = "tcp_ecn",
437 .data = &sysctl_tcp_ecn,
438 .maxlen = sizeof(int),
439 .mode = 0644,
440 .proc_handler = proc_dointvec
441 },
442 {
443 .procname = "tcp_dsack",
444 .data = &sysctl_tcp_dsack,
445 .maxlen = sizeof(int),
446 .mode = 0644,
447 .proc_handler = proc_dointvec
448 },
449 {
450 .procname = "tcp_mem",
451 .data = &sysctl_tcp_mem,
452 .maxlen = sizeof(sysctl_tcp_mem),
453 .mode = 0644,
454 .proc_handler = proc_doulongvec_minmax
455 },
456 {
457 .procname = "tcp_wmem",
458 .data = &sysctl_tcp_wmem,
459 .maxlen = sizeof(sysctl_tcp_wmem),
460 .mode = 0644,
461 .proc_handler = proc_dointvec
462 },
463 {
464 .procname = "tcp_rmem",
465 .data = &sysctl_tcp_rmem,
466 .maxlen = sizeof(sysctl_tcp_rmem),
467 .mode = 0644,
468 .proc_handler = proc_dointvec
469 },
470 {
471 .procname = "tcp_app_win",
472 .data = &sysctl_tcp_app_win,
473 .maxlen = sizeof(int),
474 .mode = 0644,
475 .proc_handler = proc_dointvec
476 },
477 {
478 .procname = "tcp_adv_win_scale",
479 .data = &sysctl_tcp_adv_win_scale,
480 .maxlen = sizeof(int),
481 .mode = 0644,
482 .proc_handler = proc_dointvec_minmax,
483 .extra1 = &tcp_adv_win_scale_min,
484 .extra2 = &tcp_adv_win_scale_max,
485 },
486 {
487 .procname = "tcp_tw_reuse",
488 .data = &sysctl_tcp_tw_reuse,
489 .maxlen = sizeof(int),
490 .mode = 0644,
491 .proc_handler = proc_dointvec
492 },
493 {
494 .procname = "tcp_frto",
495 .data = &sysctl_tcp_frto,
496 .maxlen = sizeof(int),
497 .mode = 0644,
498 .proc_handler = proc_dointvec
499 },
500 {
501 .procname = "tcp_frto_response",
502 .data = &sysctl_tcp_frto_response,
503 .maxlen = sizeof(int),
504 .mode = 0644,
505 .proc_handler = proc_dointvec
506 },
507 {
508 .procname = "tcp_low_latency",
509 .data = &sysctl_tcp_low_latency,
510 .maxlen = sizeof(int),
511 .mode = 0644,
512 .proc_handler = proc_dointvec
513 },
514 {
515 .procname = "tcp_no_metrics_save",
516 .data = &sysctl_tcp_nometrics_save,
517 .maxlen = sizeof(int),
518 .mode = 0644,
519 .proc_handler = proc_dointvec,
520 },
521 {
522 .procname = "tcp_moderate_rcvbuf",
523 .data = &sysctl_tcp_moderate_rcvbuf,
524 .maxlen = sizeof(int),
525 .mode = 0644,
526 .proc_handler = proc_dointvec,
527 },
528 {
529 .procname = "tcp_tso_win_divisor",
530 .data = &sysctl_tcp_tso_win_divisor,
531 .maxlen = sizeof(int),
532 .mode = 0644,
533 .proc_handler = proc_dointvec,
534 },
535 {
536 .procname = "tcp_congestion_control",
537 .mode = 0644,
538 .maxlen = TCP_CA_NAME_MAX,
539 .proc_handler = proc_tcp_congestion_control,
540 },
541 {
542 .procname = "tcp_abc",
543 .data = &sysctl_tcp_abc,
544 .maxlen = sizeof(int),
545 .mode = 0644,
546 .proc_handler = proc_dointvec,
547 },
548 {
549 .procname = "tcp_mtu_probing",
550 .data = &sysctl_tcp_mtu_probing,
551 .maxlen = sizeof(int),
552 .mode = 0644,
553 .proc_handler = proc_dointvec,
554 },
555 {
556 .procname = "tcp_base_mss",
557 .data = &sysctl_tcp_base_mss,
558 .maxlen = sizeof(int),
559 .mode = 0644,
560 .proc_handler = proc_dointvec,
561 },
562 {
563 .procname = "tcp_workaround_signed_windows",
564 .data = &sysctl_tcp_workaround_signed_windows,
565 .maxlen = sizeof(int),
566 .mode = 0644,
567 .proc_handler = proc_dointvec
568 },
569#ifdef CONFIG_NET_DMA
570 {
571 .procname = "tcp_dma_copybreak",
572 .data = &sysctl_tcp_dma_copybreak,
573 .maxlen = sizeof(int),
574 .mode = 0644,
575 .proc_handler = proc_dointvec
576 },
577#endif
578 {
579 .procname = "tcp_slow_start_after_idle",
580 .data = &sysctl_tcp_slow_start_after_idle,
581 .maxlen = sizeof(int),
582 .mode = 0644,
583 .proc_handler = proc_dointvec
584 },
585#ifdef CONFIG_NETLABEL
586 {
587 .procname = "cipso_cache_enable",
588 .data = &cipso_v4_cache_enabled,
589 .maxlen = sizeof(int),
590 .mode = 0644,
591 .proc_handler = proc_dointvec,
592 },
593 {
594 .procname = "cipso_cache_bucket_size",
595 .data = &cipso_v4_cache_bucketsize,
596 .maxlen = sizeof(int),
597 .mode = 0644,
598 .proc_handler = proc_dointvec,
599 },
600 {
601 .procname = "cipso_rbm_optfmt",
602 .data = &cipso_v4_rbm_optfmt,
603 .maxlen = sizeof(int),
604 .mode = 0644,
605 .proc_handler = proc_dointvec,
606 },
607 {
608 .procname = "cipso_rbm_strictvalid",
609 .data = &cipso_v4_rbm_strictvalid,
610 .maxlen = sizeof(int),
611 .mode = 0644,
612 .proc_handler = proc_dointvec,
613 },
614#endif
615 {
616 .procname = "tcp_available_congestion_control",
617 .maxlen = TCP_CA_BUF_MAX,
618 .mode = 0444,
619 .proc_handler = proc_tcp_available_congestion_control,
620 },
621 {
622 .procname = "tcp_allowed_congestion_control",
623 .maxlen = TCP_CA_BUF_MAX,
624 .mode = 0644,
625 .proc_handler = proc_allowed_congestion_control,
626 },
627 {
628 .procname = "tcp_max_ssthresh",
629 .data = &sysctl_tcp_max_ssthresh,
630 .maxlen = sizeof(int),
631 .mode = 0644,
632 .proc_handler = proc_dointvec,
633 },
634 {
635 .procname = "tcp_cookie_size",
636 .data = &sysctl_tcp_cookie_size,
637 .maxlen = sizeof(int),
638 .mode = 0644,
639 .proc_handler = proc_dointvec
640 },
641 {
642 .procname = "tcp_thin_linear_timeouts",
643 .data = &sysctl_tcp_thin_linear_timeouts,
644 .maxlen = sizeof(int),
645 .mode = 0644,
646 .proc_handler = proc_dointvec
647 },
648 {
649 .procname = "tcp_thin_dupack",
650 .data = &sysctl_tcp_thin_dupack,
651 .maxlen = sizeof(int),
652 .mode = 0644,
653 .proc_handler = proc_dointvec
654 },
655 {
656 .procname = "udp_mem",
657 .data = &sysctl_udp_mem,
658 .maxlen = sizeof(sysctl_udp_mem),
659 .mode = 0644,
660 .proc_handler = proc_doulongvec_minmax,
661 },
662 {
663 .procname = "udp_rmem_min",
664 .data = &sysctl_udp_rmem_min,
665 .maxlen = sizeof(sysctl_udp_rmem_min),
666 .mode = 0644,
667 .proc_handler = proc_dointvec_minmax,
668 .extra1 = &zero
669 },
670 {
671 .procname = "udp_wmem_min",
672 .data = &sysctl_udp_wmem_min,
673 .maxlen = sizeof(sysctl_udp_wmem_min),
674 .mode = 0644,
675 .proc_handler = proc_dointvec_minmax,
676 .extra1 = &zero
677 },
678 { }
679};
680
681static struct ctl_table ipv4_net_table[] = {
682 {
683 .procname = "icmp_echo_ignore_all",
684 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
685 .maxlen = sizeof(int),
686 .mode = 0644,
687 .proc_handler = proc_dointvec
688 },
689 {
690 .procname = "icmp_echo_ignore_broadcasts",
691 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
692 .maxlen = sizeof(int),
693 .mode = 0644,
694 .proc_handler = proc_dointvec
695 },
696 {
697 .procname = "icmp_ignore_bogus_error_responses",
698 .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
699 .maxlen = sizeof(int),
700 .mode = 0644,
701 .proc_handler = proc_dointvec
702 },
703 {
704 .procname = "icmp_errors_use_inbound_ifaddr",
705 .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
706 .maxlen = sizeof(int),
707 .mode = 0644,
708 .proc_handler = proc_dointvec
709 },
710 {
711 .procname = "icmp_ratelimit",
712 .data = &init_net.ipv4.sysctl_icmp_ratelimit,
713 .maxlen = sizeof(int),
714 .mode = 0644,
715 .proc_handler = proc_dointvec_ms_jiffies,
716 },
717 {
718 .procname = "icmp_ratemask",
719 .data = &init_net.ipv4.sysctl_icmp_ratemask,
720 .maxlen = sizeof(int),
721 .mode = 0644,
722 .proc_handler = proc_dointvec
723 },
724 {
725 .procname = "rt_cache_rebuild_count",
726 .data = &init_net.ipv4.sysctl_rt_cache_rebuild_count,
727 .maxlen = sizeof(int),
728 .mode = 0644,
729 .proc_handler = proc_dointvec
730 },
731 {
732 .procname = "ping_group_range",
733 .data = &init_net.ipv4.sysctl_ping_group_range,
734 .maxlen = sizeof(init_net.ipv4.sysctl_ping_group_range),
735 .mode = 0644,
736 .proc_handler = ipv4_ping_group_range,
737 },
738 { }
739};
740
741struct ctl_path net_ipv4_ctl_path[] = {
742 { .procname = "net", },
743 { .procname = "ipv4", },
744 { },
745};
746EXPORT_SYMBOL_GPL(net_ipv4_ctl_path);
747
748static __net_init int ipv4_sysctl_init_net(struct net *net)
749{
750 struct ctl_table *table;
751
752 table = ipv4_net_table;
753 if (!net_eq(net, &init_net)) {
754 table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
755 if (table == NULL)
756 goto err_alloc;
757
758 table[0].data =
759 &net->ipv4.sysctl_icmp_echo_ignore_all;
760 table[1].data =
761 &net->ipv4.sysctl_icmp_echo_ignore_broadcasts;
762 table[2].data =
763 &net->ipv4.sysctl_icmp_ignore_bogus_error_responses;
764 table[3].data =
765 &net->ipv4.sysctl_icmp_errors_use_inbound_ifaddr;
766 table[4].data =
767 &net->ipv4.sysctl_icmp_ratelimit;
768 table[5].data =
769 &net->ipv4.sysctl_icmp_ratemask;
770 table[6].data =
771 &net->ipv4.sysctl_rt_cache_rebuild_count;
772 table[7].data =
773 &net->ipv4.sysctl_ping_group_range;
774
775 }
776
777
778
779
780
781 net->ipv4.sysctl_ping_group_range[0] = 1;
782 net->ipv4.sysctl_ping_group_range[1] = 0;
783
784 net->ipv4.sysctl_rt_cache_rebuild_count = 4;
785
786 net->ipv4.ipv4_hdr = register_net_sysctl_table(net,
787 net_ipv4_ctl_path, table);
788 if (net->ipv4.ipv4_hdr == NULL)
789 goto err_reg;
790
791 return 0;
792
793err_reg:
794 if (!net_eq(net, &init_net))
795 kfree(table);
796err_alloc:
797 return -ENOMEM;
798}
799
800static __net_exit void ipv4_sysctl_exit_net(struct net *net)
801{
802 struct ctl_table *table;
803
804 table = net->ipv4.ipv4_hdr->ctl_table_arg;
805 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
806 kfree(table);
807}
808
809static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
810 .init = ipv4_sysctl_init_net,
811 .exit = ipv4_sysctl_exit_net,
812};
813
814static __init int sysctl_ipv4_init(void)
815{
816 struct ctl_table_header *hdr;
817 struct ctl_table *i;
818
819 for (i = ipv4_table; i->procname; i++) {
820 if (strcmp(i->procname, "ip_local_reserved_ports") == 0) {
821 i->data = sysctl_local_reserved_ports;
822 break;
823 }
824 }
825 if (!i->procname)
826 return -EINVAL;
827
828 hdr = register_sysctl_paths(net_ipv4_ctl_path, ipv4_table);
829 if (hdr == NULL)
830 return -ENOMEM;
831
832 if (register_pernet_subsys(&ipv4_sysctl_ops)) {
833 unregister_sysctl_table(hdr);
834 return -ENOMEM;
835 }
836
837 return 0;
838}
839
840__initcall(sysctl_ipv4_init);
841
