2 * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
4 * Begun April 1, 1996, Mike Shaver.
5 * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
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>
18 #include <net/route.h>
21 #include <net/cipso_ipv4.h>
22 #include <net/inet_frag.h>
25 static int tcp_retr1_max = 255;
26 static int ip_local_port_range_min[] = { 1, 1 };
27 static int ip_local_port_range_max[] = { 65535, 65535 };
29 extern seqlock_t sysctl_port_range_lock;
30 extern int sysctl_local_port_range[2];
32 /* Update system visible IP port range */
33 static void set_local_port_range(int range[2])
35 write_seqlock(&sysctl_port_range_lock);
36 sysctl_local_port_range[0] = range[0];
37 sysctl_local_port_range[1] = range[1];
38 write_sequnlock(&sysctl_port_range_lock);
41 /* Validate changes from /proc interface. */
42 static int ipv4_local_port_range(ctl_table *table, int write, struct file *filp,
44 size_t *lenp, loff_t *ppos)
47 int range[2] = { sysctl_local_port_range[0],
48 sysctl_local_port_range[1] };
51 .maxlen = sizeof(range),
53 .extra1 = &ip_local_port_range_min,
54 .extra2 = &ip_local_port_range_max,
57 ret = proc_dointvec_minmax(&tmp, write, filp, buffer, lenp, ppos);
59 if (write && ret == 0) {
60 if (range[1] < range[0])
63 set_local_port_range(range);
69 /* Validate changes from sysctl interface. */
70 static int ipv4_sysctl_local_port_range(ctl_table *table, int __user *name,
71 int nlen, void __user *oldval,
72 size_t __user *oldlenp,
73 void __user *newval, size_t newlen)
76 int range[2] = { sysctl_local_port_range[0],
77 sysctl_local_port_range[1] };
80 .maxlen = sizeof(range),
82 .extra1 = &ip_local_port_range_min,
83 .extra2 = &ip_local_port_range_max,
86 ret = sysctl_intvec(&tmp, name, nlen, oldval, oldlenp, newval, newlen);
87 if (ret == 0 && newval && newlen) {
88 if (range[1] < range[0])
91 set_local_port_range(range);
97 static int proc_tcp_congestion_control(ctl_table *ctl, int write, struct file * filp,
98 void __user *buffer, size_t *lenp, loff_t *ppos)
100 char val[TCP_CA_NAME_MAX];
103 .maxlen = TCP_CA_NAME_MAX,
107 tcp_get_default_congestion_control(val);
109 ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
110 if (write && ret == 0)
111 ret = tcp_set_default_congestion_control(val);
115 static int sysctl_tcp_congestion_control(ctl_table *table, int __user *name,
116 int nlen, void __user *oldval,
117 size_t __user *oldlenp,
118 void __user *newval, size_t newlen)
120 char val[TCP_CA_NAME_MAX];
123 .maxlen = TCP_CA_NAME_MAX,
127 tcp_get_default_congestion_control(val);
128 ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen);
129 if (ret == 1 && newval && newlen)
130 ret = tcp_set_default_congestion_control(val);
134 static int proc_tcp_available_congestion_control(ctl_table *ctl,
135 int write, struct file * filp,
136 void __user *buffer, size_t *lenp,
139 ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
142 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
145 tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
146 ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
151 static int proc_allowed_congestion_control(ctl_table *ctl,
152 int write, struct file * filp,
153 void __user *buffer, size_t *lenp,
156 ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
159 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
163 tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
164 ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
165 if (write && ret == 0)
166 ret = tcp_set_allowed_congestion_control(tbl.data);
171 static int strategy_allowed_congestion_control(ctl_table *table, int __user *name,
172 int nlen, void __user *oldval,
173 size_t __user *oldlenp,
177 ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
180 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
184 tcp_get_available_congestion_control(tbl.data, tbl.maxlen);
185 ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen);
186 if (ret == 1 && newval && newlen)
187 ret = tcp_set_allowed_congestion_control(tbl.data);
194 static struct ctl_table ipv4_table[] = {
196 .ctl_name = NET_IPV4_TCP_TIMESTAMPS,
197 .procname = "tcp_timestamps",
198 .data = &sysctl_tcp_timestamps,
199 .maxlen = sizeof(int),
201 .proc_handler = &proc_dointvec
204 .ctl_name = NET_IPV4_TCP_WINDOW_SCALING,
205 .procname = "tcp_window_scaling",
206 .data = &sysctl_tcp_window_scaling,
207 .maxlen = sizeof(int),
209 .proc_handler = &proc_dointvec
212 .ctl_name = NET_IPV4_TCP_SACK,
213 .procname = "tcp_sack",
214 .data = &sysctl_tcp_sack,
215 .maxlen = sizeof(int),
217 .proc_handler = &proc_dointvec
220 .ctl_name = NET_IPV4_TCP_RETRANS_COLLAPSE,
221 .procname = "tcp_retrans_collapse",
222 .data = &sysctl_tcp_retrans_collapse,
223 .maxlen = sizeof(int),
225 .proc_handler = &proc_dointvec
228 .ctl_name = NET_IPV4_DEFAULT_TTL,
229 .procname = "ip_default_ttl",
230 .data = &sysctl_ip_default_ttl,
231 .maxlen = sizeof(int),
233 .proc_handler = &ipv4_doint_and_flush,
234 .strategy = &ipv4_doint_and_flush_strategy,
237 .ctl_name = NET_IPV4_NO_PMTU_DISC,
238 .procname = "ip_no_pmtu_disc",
239 .data = &ipv4_config.no_pmtu_disc,
240 .maxlen = sizeof(int),
242 .proc_handler = &proc_dointvec
245 .ctl_name = NET_IPV4_NONLOCAL_BIND,
246 .procname = "ip_nonlocal_bind",
247 .data = &sysctl_ip_nonlocal_bind,
248 .maxlen = sizeof(int),
250 .proc_handler = &proc_dointvec
253 .ctl_name = NET_IPV4_TCP_SYN_RETRIES,
254 .procname = "tcp_syn_retries",
255 .data = &sysctl_tcp_syn_retries,
256 .maxlen = sizeof(int),
258 .proc_handler = &proc_dointvec
261 .ctl_name = NET_TCP_SYNACK_RETRIES,
262 .procname = "tcp_synack_retries",
263 .data = &sysctl_tcp_synack_retries,
264 .maxlen = sizeof(int),
266 .proc_handler = &proc_dointvec
269 .ctl_name = NET_TCP_MAX_ORPHANS,
270 .procname = "tcp_max_orphans",
271 .data = &sysctl_tcp_max_orphans,
272 .maxlen = sizeof(int),
274 .proc_handler = &proc_dointvec
277 .ctl_name = NET_TCP_MAX_TW_BUCKETS,
278 .procname = "tcp_max_tw_buckets",
279 .data = &tcp_death_row.sysctl_max_tw_buckets,
280 .maxlen = sizeof(int),
282 .proc_handler = &proc_dointvec
285 .ctl_name = NET_IPV4_DYNADDR,
286 .procname = "ip_dynaddr",
287 .data = &sysctl_ip_dynaddr,
288 .maxlen = sizeof(int),
290 .proc_handler = &proc_dointvec
293 .ctl_name = NET_IPV4_TCP_KEEPALIVE_TIME,
294 .procname = "tcp_keepalive_time",
295 .data = &sysctl_tcp_keepalive_time,
296 .maxlen = sizeof(int),
298 .proc_handler = &proc_dointvec_jiffies,
299 .strategy = &sysctl_jiffies
302 .ctl_name = NET_IPV4_TCP_KEEPALIVE_PROBES,
303 .procname = "tcp_keepalive_probes",
304 .data = &sysctl_tcp_keepalive_probes,
305 .maxlen = sizeof(int),
307 .proc_handler = &proc_dointvec
310 .ctl_name = NET_IPV4_TCP_KEEPALIVE_INTVL,
311 .procname = "tcp_keepalive_intvl",
312 .data = &sysctl_tcp_keepalive_intvl,
313 .maxlen = sizeof(int),
315 .proc_handler = &proc_dointvec_jiffies,
316 .strategy = &sysctl_jiffies
319 .ctl_name = NET_IPV4_TCP_RETRIES1,
320 .procname = "tcp_retries1",
321 .data = &sysctl_tcp_retries1,
322 .maxlen = sizeof(int),
324 .proc_handler = &proc_dointvec_minmax,
325 .strategy = &sysctl_intvec,
326 .extra2 = &tcp_retr1_max
329 .ctl_name = NET_IPV4_TCP_RETRIES2,
330 .procname = "tcp_retries2",
331 .data = &sysctl_tcp_retries2,
332 .maxlen = sizeof(int),
334 .proc_handler = &proc_dointvec
337 .ctl_name = NET_IPV4_TCP_FIN_TIMEOUT,
338 .procname = "tcp_fin_timeout",
339 .data = &sysctl_tcp_fin_timeout,
340 .maxlen = sizeof(int),
342 .proc_handler = &proc_dointvec_jiffies,
343 .strategy = &sysctl_jiffies
345 #ifdef CONFIG_SYN_COOKIES
347 .ctl_name = NET_TCP_SYNCOOKIES,
348 .procname = "tcp_syncookies",
349 .data = &sysctl_tcp_syncookies,
350 .maxlen = sizeof(int),
352 .proc_handler = &proc_dointvec
356 .ctl_name = NET_TCP_TW_RECYCLE,
357 .procname = "tcp_tw_recycle",
358 .data = &tcp_death_row.sysctl_tw_recycle,
359 .maxlen = sizeof(int),
361 .proc_handler = &proc_dointvec
364 .ctl_name = NET_TCP_ABORT_ON_OVERFLOW,
365 .procname = "tcp_abort_on_overflow",
366 .data = &sysctl_tcp_abort_on_overflow,
367 .maxlen = sizeof(int),
369 .proc_handler = &proc_dointvec
372 .ctl_name = NET_TCP_STDURG,
373 .procname = "tcp_stdurg",
374 .data = &sysctl_tcp_stdurg,
375 .maxlen = sizeof(int),
377 .proc_handler = &proc_dointvec
380 .ctl_name = NET_TCP_RFC1337,
381 .procname = "tcp_rfc1337",
382 .data = &sysctl_tcp_rfc1337,
383 .maxlen = sizeof(int),
385 .proc_handler = &proc_dointvec
388 .ctl_name = NET_TCP_MAX_SYN_BACKLOG,
389 .procname = "tcp_max_syn_backlog",
390 .data = &sysctl_max_syn_backlog,
391 .maxlen = sizeof(int),
393 .proc_handler = &proc_dointvec
396 .ctl_name = NET_IPV4_LOCAL_PORT_RANGE,
397 .procname = "ip_local_port_range",
398 .data = &sysctl_local_port_range,
399 .maxlen = sizeof(sysctl_local_port_range),
401 .proc_handler = &ipv4_local_port_range,
402 .strategy = &ipv4_sysctl_local_port_range,
404 #ifdef CONFIG_IP_MULTICAST
406 .ctl_name = NET_IPV4_IGMP_MAX_MEMBERSHIPS,
407 .procname = "igmp_max_memberships",
408 .data = &sysctl_igmp_max_memberships,
409 .maxlen = sizeof(int),
411 .proc_handler = &proc_dointvec
416 .ctl_name = NET_IPV4_IGMP_MAX_MSF,
417 .procname = "igmp_max_msf",
418 .data = &sysctl_igmp_max_msf,
419 .maxlen = sizeof(int),
421 .proc_handler = &proc_dointvec
424 .ctl_name = NET_IPV4_INET_PEER_THRESHOLD,
425 .procname = "inet_peer_threshold",
426 .data = &inet_peer_threshold,
427 .maxlen = sizeof(int),
429 .proc_handler = &proc_dointvec
432 .ctl_name = NET_IPV4_INET_PEER_MINTTL,
433 .procname = "inet_peer_minttl",
434 .data = &inet_peer_minttl,
435 .maxlen = sizeof(int),
437 .proc_handler = &proc_dointvec_jiffies,
438 .strategy = &sysctl_jiffies
441 .ctl_name = NET_IPV4_INET_PEER_MAXTTL,
442 .procname = "inet_peer_maxttl",
443 .data = &inet_peer_maxttl,
444 .maxlen = sizeof(int),
446 .proc_handler = &proc_dointvec_jiffies,
447 .strategy = &sysctl_jiffies
450 .ctl_name = NET_IPV4_INET_PEER_GC_MINTIME,
451 .procname = "inet_peer_gc_mintime",
452 .data = &inet_peer_gc_mintime,
453 .maxlen = sizeof(int),
455 .proc_handler = &proc_dointvec_jiffies,
456 .strategy = &sysctl_jiffies
459 .ctl_name = NET_IPV4_INET_PEER_GC_MAXTIME,
460 .procname = "inet_peer_gc_maxtime",
461 .data = &inet_peer_gc_maxtime,
462 .maxlen = sizeof(int),
464 .proc_handler = &proc_dointvec_jiffies,
465 .strategy = &sysctl_jiffies
468 .ctl_name = NET_TCP_ORPHAN_RETRIES,
469 .procname = "tcp_orphan_retries",
470 .data = &sysctl_tcp_orphan_retries,
471 .maxlen = sizeof(int),
473 .proc_handler = &proc_dointvec
476 .ctl_name = NET_TCP_FACK,
477 .procname = "tcp_fack",
478 .data = &sysctl_tcp_fack,
479 .maxlen = sizeof(int),
481 .proc_handler = &proc_dointvec
484 .ctl_name = NET_TCP_REORDERING,
485 .procname = "tcp_reordering",
486 .data = &sysctl_tcp_reordering,
487 .maxlen = sizeof(int),
489 .proc_handler = &proc_dointvec
492 .ctl_name = NET_TCP_ECN,
493 .procname = "tcp_ecn",
494 .data = &sysctl_tcp_ecn,
495 .maxlen = sizeof(int),
497 .proc_handler = &proc_dointvec
500 .ctl_name = NET_TCP_DSACK,
501 .procname = "tcp_dsack",
502 .data = &sysctl_tcp_dsack,
503 .maxlen = sizeof(int),
505 .proc_handler = &proc_dointvec
508 .ctl_name = NET_TCP_MEM,
509 .procname = "tcp_mem",
510 .data = &sysctl_tcp_mem,
511 .maxlen = sizeof(sysctl_tcp_mem),
513 .proc_handler = &proc_dointvec
516 .ctl_name = NET_TCP_WMEM,
517 .procname = "tcp_wmem",
518 .data = &sysctl_tcp_wmem,
519 .maxlen = sizeof(sysctl_tcp_wmem),
521 .proc_handler = &proc_dointvec
524 .ctl_name = NET_TCP_RMEM,
525 .procname = "tcp_rmem",
526 .data = &sysctl_tcp_rmem,
527 .maxlen = sizeof(sysctl_tcp_rmem),
529 .proc_handler = &proc_dointvec
532 .ctl_name = NET_TCP_APP_WIN,
533 .procname = "tcp_app_win",
534 .data = &sysctl_tcp_app_win,
535 .maxlen = sizeof(int),
537 .proc_handler = &proc_dointvec
540 .ctl_name = NET_TCP_ADV_WIN_SCALE,
541 .procname = "tcp_adv_win_scale",
542 .data = &sysctl_tcp_adv_win_scale,
543 .maxlen = sizeof(int),
545 .proc_handler = &proc_dointvec
548 .ctl_name = NET_TCP_TW_REUSE,
549 .procname = "tcp_tw_reuse",
550 .data = &sysctl_tcp_tw_reuse,
551 .maxlen = sizeof(int),
553 .proc_handler = &proc_dointvec
556 .ctl_name = NET_TCP_FRTO,
557 .procname = "tcp_frto",
558 .data = &sysctl_tcp_frto,
559 .maxlen = sizeof(int),
561 .proc_handler = &proc_dointvec
564 .ctl_name = NET_TCP_FRTO_RESPONSE,
565 .procname = "tcp_frto_response",
566 .data = &sysctl_tcp_frto_response,
567 .maxlen = sizeof(int),
569 .proc_handler = &proc_dointvec
572 .ctl_name = NET_TCP_LOW_LATENCY,
573 .procname = "tcp_low_latency",
574 .data = &sysctl_tcp_low_latency,
575 .maxlen = sizeof(int),
577 .proc_handler = &proc_dointvec
580 .ctl_name = NET_TCP_NO_METRICS_SAVE,
581 .procname = "tcp_no_metrics_save",
582 .data = &sysctl_tcp_nometrics_save,
583 .maxlen = sizeof(int),
585 .proc_handler = &proc_dointvec,
588 .ctl_name = NET_TCP_MODERATE_RCVBUF,
589 .procname = "tcp_moderate_rcvbuf",
590 .data = &sysctl_tcp_moderate_rcvbuf,
591 .maxlen = sizeof(int),
593 .proc_handler = &proc_dointvec,
596 .ctl_name = NET_TCP_TSO_WIN_DIVISOR,
597 .procname = "tcp_tso_win_divisor",
598 .data = &sysctl_tcp_tso_win_divisor,
599 .maxlen = sizeof(int),
601 .proc_handler = &proc_dointvec,
604 .ctl_name = NET_TCP_CONG_CONTROL,
605 .procname = "tcp_congestion_control",
607 .maxlen = TCP_CA_NAME_MAX,
608 .proc_handler = &proc_tcp_congestion_control,
609 .strategy = &sysctl_tcp_congestion_control,
612 .ctl_name = NET_TCP_ABC,
613 .procname = "tcp_abc",
614 .data = &sysctl_tcp_abc,
615 .maxlen = sizeof(int),
617 .proc_handler = &proc_dointvec,
620 .ctl_name = NET_TCP_MTU_PROBING,
621 .procname = "tcp_mtu_probing",
622 .data = &sysctl_tcp_mtu_probing,
623 .maxlen = sizeof(int),
625 .proc_handler = &proc_dointvec,
628 .ctl_name = NET_TCP_BASE_MSS,
629 .procname = "tcp_base_mss",
630 .data = &sysctl_tcp_base_mss,
631 .maxlen = sizeof(int),
633 .proc_handler = &proc_dointvec,
636 .ctl_name = NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS,
637 .procname = "tcp_workaround_signed_windows",
638 .data = &sysctl_tcp_workaround_signed_windows,
639 .maxlen = sizeof(int),
641 .proc_handler = &proc_dointvec
643 #ifdef CONFIG_NET_DMA
645 .ctl_name = NET_TCP_DMA_COPYBREAK,
646 .procname = "tcp_dma_copybreak",
647 .data = &sysctl_tcp_dma_copybreak,
648 .maxlen = sizeof(int),
650 .proc_handler = &proc_dointvec
654 .ctl_name = NET_TCP_SLOW_START_AFTER_IDLE,
655 .procname = "tcp_slow_start_after_idle",
656 .data = &sysctl_tcp_slow_start_after_idle,
657 .maxlen = sizeof(int),
659 .proc_handler = &proc_dointvec
661 #ifdef CONFIG_NETLABEL
663 .ctl_name = NET_CIPSOV4_CACHE_ENABLE,
664 .procname = "cipso_cache_enable",
665 .data = &cipso_v4_cache_enabled,
666 .maxlen = sizeof(int),
668 .proc_handler = &proc_dointvec,
671 .ctl_name = NET_CIPSOV4_CACHE_BUCKET_SIZE,
672 .procname = "cipso_cache_bucket_size",
673 .data = &cipso_v4_cache_bucketsize,
674 .maxlen = sizeof(int),
676 .proc_handler = &proc_dointvec,
679 .ctl_name = NET_CIPSOV4_RBM_OPTFMT,
680 .procname = "cipso_rbm_optfmt",
681 .data = &cipso_v4_rbm_optfmt,
682 .maxlen = sizeof(int),
684 .proc_handler = &proc_dointvec,
687 .ctl_name = NET_CIPSOV4_RBM_STRICTVALID,
688 .procname = "cipso_rbm_strictvalid",
689 .data = &cipso_v4_rbm_strictvalid,
690 .maxlen = sizeof(int),
692 .proc_handler = &proc_dointvec,
694 #endif /* CONFIG_NETLABEL */
696 .procname = "tcp_available_congestion_control",
697 .maxlen = TCP_CA_BUF_MAX,
699 .proc_handler = &proc_tcp_available_congestion_control,
702 .ctl_name = NET_TCP_ALLOWED_CONG_CONTROL,
703 .procname = "tcp_allowed_congestion_control",
704 .maxlen = TCP_CA_BUF_MAX,
706 .proc_handler = &proc_allowed_congestion_control,
707 .strategy = &strategy_allowed_congestion_control,
710 .ctl_name = NET_TCP_MAX_SSTHRESH,
711 .procname = "tcp_max_ssthresh",
712 .data = &sysctl_tcp_max_ssthresh,
713 .maxlen = sizeof(int),
715 .proc_handler = &proc_dointvec,
718 .ctl_name = CTL_UNNUMBERED,
719 .procname = "udp_mem",
720 .data = &sysctl_udp_mem,
721 .maxlen = sizeof(sysctl_udp_mem),
723 .proc_handler = &proc_dointvec_minmax,
724 .strategy = &sysctl_intvec,
728 .ctl_name = CTL_UNNUMBERED,
729 .procname = "udp_rmem_min",
730 .data = &sysctl_udp_rmem_min,
731 .maxlen = sizeof(sysctl_udp_rmem_min),
733 .proc_handler = &proc_dointvec_minmax,
734 .strategy = &sysctl_intvec,
738 .ctl_name = CTL_UNNUMBERED,
739 .procname = "udp_wmem_min",
740 .data = &sysctl_udp_wmem_min,
741 .maxlen = sizeof(sysctl_udp_wmem_min),
743 .proc_handler = &proc_dointvec_minmax,
744 .strategy = &sysctl_intvec,
750 static struct ctl_table ipv4_net_table[] = {
752 .ctl_name = NET_IPV4_ICMP_ECHO_IGNORE_ALL,
753 .procname = "icmp_echo_ignore_all",
754 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all,
755 .maxlen = sizeof(int),
757 .proc_handler = &proc_dointvec
760 .ctl_name = NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,
761 .procname = "icmp_echo_ignore_broadcasts",
762 .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
763 .maxlen = sizeof(int),
765 .proc_handler = &proc_dointvec
768 .ctl_name = NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
769 .procname = "icmp_ignore_bogus_error_responses",
770 .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
771 .maxlen = sizeof(int),
773 .proc_handler = &proc_dointvec
776 .ctl_name = NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
777 .procname = "icmp_errors_use_inbound_ifaddr",
778 .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
779 .maxlen = sizeof(int),
781 .proc_handler = &proc_dointvec
784 .ctl_name = NET_IPV4_ICMP_RATELIMIT,
785 .procname = "icmp_ratelimit",
786 .data = &init_net.ipv4.sysctl_icmp_ratelimit,
787 .maxlen = sizeof(int),
789 .proc_handler = &proc_dointvec_ms_jiffies,
790 .strategy = &sysctl_ms_jiffies
793 .ctl_name = NET_IPV4_ICMP_RATEMASK,
794 .procname = "icmp_ratemask",
795 .data = &init_net.ipv4.sysctl_icmp_ratemask,
796 .maxlen = sizeof(int),
798 .proc_handler = &proc_dointvec
803 struct ctl_path net_ipv4_ctl_path[] = {
804 { .procname = "net", .ctl_name = CTL_NET, },
805 { .procname = "ipv4", .ctl_name = NET_IPV4, },
808 EXPORT_SYMBOL_GPL(net_ipv4_ctl_path);
810 static __net_init int ipv4_sysctl_init_net(struct net *net)
812 struct ctl_table *table;
814 table = ipv4_net_table;
815 if (net != &init_net) {
816 table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL);
821 &net->ipv4.sysctl_icmp_echo_ignore_all;
823 &net->ipv4.sysctl_icmp_echo_ignore_broadcasts;
825 &net->ipv4.sysctl_icmp_ignore_bogus_error_responses;
827 &net->ipv4.sysctl_icmp_errors_use_inbound_ifaddr;
829 &net->ipv4.sysctl_icmp_ratelimit;
831 &net->ipv4.sysctl_icmp_ratemask;
834 net->ipv4.ipv4_hdr = register_net_sysctl_table(net,
835 net_ipv4_ctl_path, table);
836 if (net->ipv4.ipv4_hdr == NULL)
842 if (net != &init_net)
848 static __net_exit void ipv4_sysctl_exit_net(struct net *net)
850 struct ctl_table *table;
852 table = net->ipv4.ipv4_hdr->ctl_table_arg;
853 unregister_net_sysctl_table(net->ipv4.ipv4_hdr);
857 static __net_initdata struct pernet_operations ipv4_sysctl_ops = {
858 .init = ipv4_sysctl_init_net,
859 .exit = ipv4_sysctl_exit_net,
862 static __init int sysctl_ipv4_init(void)
864 struct ctl_table_header *hdr;
866 hdr = register_sysctl_paths(net_ipv4_ctl_path, ipv4_table);
870 if (register_pernet_subsys(&ipv4_sysctl_ops)) {
871 unregister_sysctl_table(hdr);
878 __initcall(sysctl_ipv4_init);