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
,
405 .ctl_name
= NET_IPV4_ROUTE
,
409 .child
= ipv4_route_table
411 #ifdef CONFIG_IP_MULTICAST
413 .ctl_name
= NET_IPV4_IGMP_MAX_MEMBERSHIPS
,
414 .procname
= "igmp_max_memberships",
415 .data
= &sysctl_igmp_max_memberships
,
416 .maxlen
= sizeof(int),
418 .proc_handler
= &proc_dointvec
423 .ctl_name
= NET_IPV4_IGMP_MAX_MSF
,
424 .procname
= "igmp_max_msf",
425 .data
= &sysctl_igmp_max_msf
,
426 .maxlen
= sizeof(int),
428 .proc_handler
= &proc_dointvec
431 .ctl_name
= NET_IPV4_INET_PEER_THRESHOLD
,
432 .procname
= "inet_peer_threshold",
433 .data
= &inet_peer_threshold
,
434 .maxlen
= sizeof(int),
436 .proc_handler
= &proc_dointvec
439 .ctl_name
= NET_IPV4_INET_PEER_MINTTL
,
440 .procname
= "inet_peer_minttl",
441 .data
= &inet_peer_minttl
,
442 .maxlen
= sizeof(int),
444 .proc_handler
= &proc_dointvec_jiffies
,
445 .strategy
= &sysctl_jiffies
448 .ctl_name
= NET_IPV4_INET_PEER_MAXTTL
,
449 .procname
= "inet_peer_maxttl",
450 .data
= &inet_peer_maxttl
,
451 .maxlen
= sizeof(int),
453 .proc_handler
= &proc_dointvec_jiffies
,
454 .strategy
= &sysctl_jiffies
457 .ctl_name
= NET_IPV4_INET_PEER_GC_MINTIME
,
458 .procname
= "inet_peer_gc_mintime",
459 .data
= &inet_peer_gc_mintime
,
460 .maxlen
= sizeof(int),
462 .proc_handler
= &proc_dointvec_jiffies
,
463 .strategy
= &sysctl_jiffies
466 .ctl_name
= NET_IPV4_INET_PEER_GC_MAXTIME
,
467 .procname
= "inet_peer_gc_maxtime",
468 .data
= &inet_peer_gc_maxtime
,
469 .maxlen
= sizeof(int),
471 .proc_handler
= &proc_dointvec_jiffies
,
472 .strategy
= &sysctl_jiffies
475 .ctl_name
= NET_TCP_ORPHAN_RETRIES
,
476 .procname
= "tcp_orphan_retries",
477 .data
= &sysctl_tcp_orphan_retries
,
478 .maxlen
= sizeof(int),
480 .proc_handler
= &proc_dointvec
483 .ctl_name
= NET_TCP_FACK
,
484 .procname
= "tcp_fack",
485 .data
= &sysctl_tcp_fack
,
486 .maxlen
= sizeof(int),
488 .proc_handler
= &proc_dointvec
491 .ctl_name
= NET_TCP_REORDERING
,
492 .procname
= "tcp_reordering",
493 .data
= &sysctl_tcp_reordering
,
494 .maxlen
= sizeof(int),
496 .proc_handler
= &proc_dointvec
499 .ctl_name
= NET_TCP_ECN
,
500 .procname
= "tcp_ecn",
501 .data
= &sysctl_tcp_ecn
,
502 .maxlen
= sizeof(int),
504 .proc_handler
= &proc_dointvec
507 .ctl_name
= NET_TCP_DSACK
,
508 .procname
= "tcp_dsack",
509 .data
= &sysctl_tcp_dsack
,
510 .maxlen
= sizeof(int),
512 .proc_handler
= &proc_dointvec
515 .ctl_name
= NET_TCP_MEM
,
516 .procname
= "tcp_mem",
517 .data
= &sysctl_tcp_mem
,
518 .maxlen
= sizeof(sysctl_tcp_mem
),
520 .proc_handler
= &proc_dointvec
523 .ctl_name
= NET_TCP_WMEM
,
524 .procname
= "tcp_wmem",
525 .data
= &sysctl_tcp_wmem
,
526 .maxlen
= sizeof(sysctl_tcp_wmem
),
528 .proc_handler
= &proc_dointvec
531 .ctl_name
= NET_TCP_RMEM
,
532 .procname
= "tcp_rmem",
533 .data
= &sysctl_tcp_rmem
,
534 .maxlen
= sizeof(sysctl_tcp_rmem
),
536 .proc_handler
= &proc_dointvec
539 .ctl_name
= NET_TCP_APP_WIN
,
540 .procname
= "tcp_app_win",
541 .data
= &sysctl_tcp_app_win
,
542 .maxlen
= sizeof(int),
544 .proc_handler
= &proc_dointvec
547 .ctl_name
= NET_TCP_ADV_WIN_SCALE
,
548 .procname
= "tcp_adv_win_scale",
549 .data
= &sysctl_tcp_adv_win_scale
,
550 .maxlen
= sizeof(int),
552 .proc_handler
= &proc_dointvec
555 .ctl_name
= NET_TCP_TW_REUSE
,
556 .procname
= "tcp_tw_reuse",
557 .data
= &sysctl_tcp_tw_reuse
,
558 .maxlen
= sizeof(int),
560 .proc_handler
= &proc_dointvec
563 .ctl_name
= NET_TCP_FRTO
,
564 .procname
= "tcp_frto",
565 .data
= &sysctl_tcp_frto
,
566 .maxlen
= sizeof(int),
568 .proc_handler
= &proc_dointvec
571 .ctl_name
= NET_TCP_FRTO_RESPONSE
,
572 .procname
= "tcp_frto_response",
573 .data
= &sysctl_tcp_frto_response
,
574 .maxlen
= sizeof(int),
576 .proc_handler
= &proc_dointvec
579 .ctl_name
= NET_TCP_LOW_LATENCY
,
580 .procname
= "tcp_low_latency",
581 .data
= &sysctl_tcp_low_latency
,
582 .maxlen
= sizeof(int),
584 .proc_handler
= &proc_dointvec
587 .ctl_name
= NET_TCP_NO_METRICS_SAVE
,
588 .procname
= "tcp_no_metrics_save",
589 .data
= &sysctl_tcp_nometrics_save
,
590 .maxlen
= sizeof(int),
592 .proc_handler
= &proc_dointvec
,
595 .ctl_name
= NET_TCP_MODERATE_RCVBUF
,
596 .procname
= "tcp_moderate_rcvbuf",
597 .data
= &sysctl_tcp_moderate_rcvbuf
,
598 .maxlen
= sizeof(int),
600 .proc_handler
= &proc_dointvec
,
603 .ctl_name
= NET_TCP_TSO_WIN_DIVISOR
,
604 .procname
= "tcp_tso_win_divisor",
605 .data
= &sysctl_tcp_tso_win_divisor
,
606 .maxlen
= sizeof(int),
608 .proc_handler
= &proc_dointvec
,
611 .ctl_name
= NET_TCP_CONG_CONTROL
,
612 .procname
= "tcp_congestion_control",
614 .maxlen
= TCP_CA_NAME_MAX
,
615 .proc_handler
= &proc_tcp_congestion_control
,
616 .strategy
= &sysctl_tcp_congestion_control
,
619 .ctl_name
= NET_TCP_ABC
,
620 .procname
= "tcp_abc",
621 .data
= &sysctl_tcp_abc
,
622 .maxlen
= sizeof(int),
624 .proc_handler
= &proc_dointvec
,
627 .ctl_name
= NET_TCP_MTU_PROBING
,
628 .procname
= "tcp_mtu_probing",
629 .data
= &sysctl_tcp_mtu_probing
,
630 .maxlen
= sizeof(int),
632 .proc_handler
= &proc_dointvec
,
635 .ctl_name
= NET_TCP_BASE_MSS
,
636 .procname
= "tcp_base_mss",
637 .data
= &sysctl_tcp_base_mss
,
638 .maxlen
= sizeof(int),
640 .proc_handler
= &proc_dointvec
,
643 .ctl_name
= NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS
,
644 .procname
= "tcp_workaround_signed_windows",
645 .data
= &sysctl_tcp_workaround_signed_windows
,
646 .maxlen
= sizeof(int),
648 .proc_handler
= &proc_dointvec
650 #ifdef CONFIG_NET_DMA
652 .ctl_name
= NET_TCP_DMA_COPYBREAK
,
653 .procname
= "tcp_dma_copybreak",
654 .data
= &sysctl_tcp_dma_copybreak
,
655 .maxlen
= sizeof(int),
657 .proc_handler
= &proc_dointvec
661 .ctl_name
= NET_TCP_SLOW_START_AFTER_IDLE
,
662 .procname
= "tcp_slow_start_after_idle",
663 .data
= &sysctl_tcp_slow_start_after_idle
,
664 .maxlen
= sizeof(int),
666 .proc_handler
= &proc_dointvec
668 #ifdef CONFIG_NETLABEL
670 .ctl_name
= NET_CIPSOV4_CACHE_ENABLE
,
671 .procname
= "cipso_cache_enable",
672 .data
= &cipso_v4_cache_enabled
,
673 .maxlen
= sizeof(int),
675 .proc_handler
= &proc_dointvec
,
678 .ctl_name
= NET_CIPSOV4_CACHE_BUCKET_SIZE
,
679 .procname
= "cipso_cache_bucket_size",
680 .data
= &cipso_v4_cache_bucketsize
,
681 .maxlen
= sizeof(int),
683 .proc_handler
= &proc_dointvec
,
686 .ctl_name
= NET_CIPSOV4_RBM_OPTFMT
,
687 .procname
= "cipso_rbm_optfmt",
688 .data
= &cipso_v4_rbm_optfmt
,
689 .maxlen
= sizeof(int),
691 .proc_handler
= &proc_dointvec
,
694 .ctl_name
= NET_CIPSOV4_RBM_STRICTVALID
,
695 .procname
= "cipso_rbm_strictvalid",
696 .data
= &cipso_v4_rbm_strictvalid
,
697 .maxlen
= sizeof(int),
699 .proc_handler
= &proc_dointvec
,
701 #endif /* CONFIG_NETLABEL */
703 .procname
= "tcp_available_congestion_control",
704 .maxlen
= TCP_CA_BUF_MAX
,
706 .proc_handler
= &proc_tcp_available_congestion_control
,
709 .ctl_name
= NET_TCP_ALLOWED_CONG_CONTROL
,
710 .procname
= "tcp_allowed_congestion_control",
711 .maxlen
= TCP_CA_BUF_MAX
,
713 .proc_handler
= &proc_allowed_congestion_control
,
714 .strategy
= &strategy_allowed_congestion_control
,
717 .ctl_name
= NET_TCP_MAX_SSTHRESH
,
718 .procname
= "tcp_max_ssthresh",
719 .data
= &sysctl_tcp_max_ssthresh
,
720 .maxlen
= sizeof(int),
722 .proc_handler
= &proc_dointvec
,
725 .ctl_name
= CTL_UNNUMBERED
,
726 .procname
= "udp_mem",
727 .data
= &sysctl_udp_mem
,
728 .maxlen
= sizeof(sysctl_udp_mem
),
730 .proc_handler
= &proc_dointvec_minmax
,
731 .strategy
= &sysctl_intvec
,
735 .ctl_name
= CTL_UNNUMBERED
,
736 .procname
= "udp_rmem_min",
737 .data
= &sysctl_udp_rmem_min
,
738 .maxlen
= sizeof(sysctl_udp_rmem_min
),
740 .proc_handler
= &proc_dointvec_minmax
,
741 .strategy
= &sysctl_intvec
,
745 .ctl_name
= CTL_UNNUMBERED
,
746 .procname
= "udp_wmem_min",
747 .data
= &sysctl_udp_wmem_min
,
748 .maxlen
= sizeof(sysctl_udp_wmem_min
),
750 .proc_handler
= &proc_dointvec_minmax
,
751 .strategy
= &sysctl_intvec
,
757 static struct ctl_table ipv4_net_table
[] = {
759 .ctl_name
= NET_IPV4_ICMP_ECHO_IGNORE_ALL
,
760 .procname
= "icmp_echo_ignore_all",
761 .data
= &init_net
.ipv4
.sysctl_icmp_echo_ignore_all
,
762 .maxlen
= sizeof(int),
764 .proc_handler
= &proc_dointvec
767 .ctl_name
= NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS
,
768 .procname
= "icmp_echo_ignore_broadcasts",
769 .data
= &init_net
.ipv4
.sysctl_icmp_echo_ignore_broadcasts
,
770 .maxlen
= sizeof(int),
772 .proc_handler
= &proc_dointvec
775 .ctl_name
= NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES
,
776 .procname
= "icmp_ignore_bogus_error_responses",
777 .data
= &init_net
.ipv4
.sysctl_icmp_ignore_bogus_error_responses
,
778 .maxlen
= sizeof(int),
780 .proc_handler
= &proc_dointvec
783 .ctl_name
= NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR
,
784 .procname
= "icmp_errors_use_inbound_ifaddr",
785 .data
= &init_net
.ipv4
.sysctl_icmp_errors_use_inbound_ifaddr
,
786 .maxlen
= sizeof(int),
788 .proc_handler
= &proc_dointvec
791 .ctl_name
= NET_IPV4_ICMP_RATELIMIT
,
792 .procname
= "icmp_ratelimit",
793 .data
= &init_net
.ipv4
.sysctl_icmp_ratelimit
,
794 .maxlen
= sizeof(int),
796 .proc_handler
= &proc_dointvec
799 .ctl_name
= NET_IPV4_ICMP_RATEMASK
,
800 .procname
= "icmp_ratemask",
801 .data
= &init_net
.ipv4
.sysctl_icmp_ratemask
,
802 .maxlen
= sizeof(int),
804 .proc_handler
= &proc_dointvec
809 struct ctl_path net_ipv4_ctl_path
[] = {
810 { .procname
= "net", .ctl_name
= CTL_NET
, },
811 { .procname
= "ipv4", .ctl_name
= NET_IPV4
, },
814 EXPORT_SYMBOL_GPL(net_ipv4_ctl_path
);
816 static __net_init
int ipv4_sysctl_init_net(struct net
*net
)
818 struct ctl_table
*table
;
820 table
= ipv4_net_table
;
821 if (net
!= &init_net
) {
822 table
= kmemdup(table
, sizeof(ipv4_net_table
), GFP_KERNEL
);
827 &net
->ipv4
.sysctl_icmp_echo_ignore_all
;
829 &net
->ipv4
.sysctl_icmp_echo_ignore_broadcasts
;
831 &net
->ipv4
.sysctl_icmp_ignore_bogus_error_responses
;
833 &net
->ipv4
.sysctl_icmp_errors_use_inbound_ifaddr
;
835 &net
->ipv4
.sysctl_icmp_ratelimit
;
837 &net
->ipv4
.sysctl_icmp_ratemask
;
840 net
->ipv4
.ipv4_hdr
= register_net_sysctl_table(net
,
841 net_ipv4_ctl_path
, table
);
842 if (net
->ipv4
.ipv4_hdr
== NULL
)
848 if (net
!= &init_net
)
854 static __net_exit
void ipv4_sysctl_exit_net(struct net
*net
)
856 struct ctl_table
*table
;
858 table
= net
->ipv4
.ipv4_hdr
->ctl_table_arg
;
859 unregister_net_sysctl_table(net
->ipv4
.ipv4_hdr
);
863 static __net_initdata
struct pernet_operations ipv4_sysctl_ops
= {
864 .init
= ipv4_sysctl_init_net
,
865 .exit
= ipv4_sysctl_exit_net
,
868 static __init
int sysctl_ipv4_init(void)
870 struct ctl_table_header
*hdr
;
872 hdr
= register_sysctl_paths(net_ipv4_ctl_path
, ipv4_table
);
876 if (register_pernet_subsys(&ipv4_sysctl_ops
)) {
877 unregister_sysctl_table(hdr
);
884 __initcall(sysctl_ipv4_init
);