2 * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
4 * $Id: sysctl_net_ipv4.c,v 1.50 2001/10/20 00:00:11 davem Exp $
6 * Begun April 1, 1996, Mike Shaver.
7 * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
11 #include <linux/module.h>
12 #include <linux/sysctl.h>
13 #include <linux/igmp.h>
14 #include <linux/inetdevice.h>
15 #include <linux/seqlock.h>
16 #include <linux/init.h>
20 #include <net/route.h>
22 #include <net/cipso_ipv4.h>
23 #include <net/inet_frag.h>
26 static int tcp_retr1_max = 255;
27 static int ip_local_port_range_min[] = { 1, 1 };
28 static int ip_local_port_range_max[] = { 65535, 65535 };
31 int ipv4_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
32 void __user *buffer, size_t *lenp, loff_t *ppos)
34 int val = IPV4_DEVCONF_ALL(FORWARDING);
37 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
39 if (write && IPV4_DEVCONF_ALL(FORWARDING) != val)
40 inet_forward_change();
45 static int ipv4_sysctl_forward_strategy(ctl_table *table,
46 int __user *name, int nlen,
47 void __user *oldval, size_t __user *oldlenp,
48 void __user *newval, size_t newlen)
50 int *valp = table->data;
53 if (!newval || !newlen)
56 if (newlen != sizeof(int))
59 if (get_user(new, (int __user *)newval))
65 if (oldval && oldlenp) {
68 if (get_user(len, oldlenp))
72 if (len > table->maxlen)
74 if (copy_to_user(oldval, valp, len))
76 if (put_user(len, oldlenp))
82 inet_forward_change();
86 extern seqlock_t sysctl_port_range_lock;
87 extern int sysctl_local_port_range[2];
89 /* Update system visible IP port range */
90 static void set_local_port_range(int range[2])
92 write_seqlock(&sysctl_port_range_lock);
93 sysctl_local_port_range[0] = range[0];
94 sysctl_local_port_range[1] = range[1];
95 write_sequnlock(&sysctl_port_range_lock);
98 /* Validate changes from /proc interface. */
99 static int ipv4_local_port_range(ctl_table *table, int write, struct file *filp,
101 size_t *lenp, loff_t *ppos)
104 int range[2] = { sysctl_local_port_range[0],
105 sysctl_local_port_range[1] };
108 .maxlen = sizeof(range),
110 .extra1 = &ip_local_port_range_min,
111 .extra2 = &ip_local_port_range_max,
114 ret = proc_dointvec_minmax(&tmp, write, filp, buffer, lenp, ppos);
116 if (write && ret == 0) {
117 if (range[1] < range[0])
120 set_local_port_range(range);
126 /* Validate changes from sysctl interface. */
127 static int ipv4_sysctl_local_port_range(ctl_table *table, int __user *name,
128 int nlen, void __user *oldval,
129 size_t __user *oldlenp,
130 void __user *newval, size_t newlen)
133 int range[2] = { sysctl_local_port_range[0],
134 sysctl_local_port_range[1] };
137 .maxlen = sizeof(range),
139 .extra1 = &ip_local_port_range_min,
140 .extra2 = &ip_local_port_range_max,
143 ret = sysctl_intvec(&tmp, name, nlen, oldval, oldlenp, newval, newlen);
144 if (ret == 0 && newval && newlen) {
145 if (range[1] < range[0])
148 set_local_port_range(range);
154 static int proc_tcp_congestion_control(ctl_table *ctl, int write, struct file * filp,
155 void __user *buffer, size_t *lenp, loff_t *ppos)
157 char val[TCP_CA_NAME_MAX];
160 .maxlen = TCP_CA_NAME_MAX,
164 tcp_get_default_congestion_control(val);
166 ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
167 if (write && ret == 0)
168 ret = tcp_set_default_congestion_control(val);
172 static int sysctl_tcp_congestion_control(ctl_table *table, int __user *name,
173 int nlen, void __user *oldval,
174 size_t __user *oldlenp,
175 void __user *newval, size_t newlen)
177 char val[TCP_CA_NAME_MAX];
180 .maxlen = TCP_CA_NAME_MAX,
184 tcp_get_default_congestion_control(val);
185 ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen);
186 if (ret == 1 && newval && newlen)
187 ret = tcp_set_default_congestion_control(val);
191 static int proc_tcp_available_congestion_control(ctl_table *ctl,
192 int write, struct file * filp,
193 void __user *buffer, size_t *lenp,
196 ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
199 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
202 tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
203 ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
208 static int proc_allowed_congestion_control(ctl_table *ctl,
209 int write, struct file * filp,
210 void __user *buffer, size_t *lenp,
213 ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
216 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
220 tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
221 ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
222 if (write && ret == 0)
223 ret = tcp_set_allowed_congestion_control(tbl.data);
228 static int strategy_allowed_congestion_control(ctl_table *table, int __user *name,
229 int nlen, void __user *oldval,
230 size_t __user *oldlenp,
234 ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
237 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
241 tcp_get_available_congestion_control(tbl.data, tbl.maxlen);
242 ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen);
243 if (ret == 0 && newval && newlen)
244 ret = tcp_set_allowed_congestion_control(tbl.data);
251 static struct ctl_table ipv4_table[] = {
253 .ctl_name = NET_IPV4_TCP_TIMESTAMPS,
254 .procname = "tcp_timestamps",
255 .data = &sysctl_tcp_timestamps,
256 .maxlen = sizeof(int),
258 .proc_handler = &proc_dointvec
261 .ctl_name = NET_IPV4_TCP_WINDOW_SCALING,
262 .procname = "tcp_window_scaling",
263 .data = &sysctl_tcp_window_scaling,
264 .maxlen = sizeof(int),
266 .proc_handler = &proc_dointvec
269 .ctl_name = NET_IPV4_TCP_SACK,
270 .procname = "tcp_sack",
271 .data = &sysctl_tcp_sack,
272 .maxlen = sizeof(int),
274 .proc_handler = &proc_dointvec
277 .ctl_name = NET_IPV4_TCP_RETRANS_COLLAPSE,
278 .procname = "tcp_retrans_collapse",
279 .data = &sysctl_tcp_retrans_collapse,
280 .maxlen = sizeof(int),
282 .proc_handler = &proc_dointvec
285 .ctl_name = NET_IPV4_FORWARD,
286 .procname = "ip_forward",
287 .data = &IPV4_DEVCONF_ALL(FORWARDING),
288 .maxlen = sizeof(int),
290 .proc_handler = &ipv4_sysctl_forward,
291 .strategy = &ipv4_sysctl_forward_strategy
294 .ctl_name = NET_IPV4_DEFAULT_TTL,
295 .procname = "ip_default_ttl",
296 .data = &sysctl_ip_default_ttl,
297 .maxlen = sizeof(int),
299 .proc_handler = &ipv4_doint_and_flush,
300 .strategy = &ipv4_doint_and_flush_strategy,
303 .ctl_name = NET_IPV4_NO_PMTU_DISC,
304 .procname = "ip_no_pmtu_disc",
305 .data = &ipv4_config.no_pmtu_disc,
306 .maxlen = sizeof(int),
308 .proc_handler = &proc_dointvec
311 .ctl_name = NET_IPV4_NONLOCAL_BIND,
312 .procname = "ip_nonlocal_bind",
313 .data = &sysctl_ip_nonlocal_bind,
314 .maxlen = sizeof(int),
316 .proc_handler = &proc_dointvec
319 .ctl_name = NET_IPV4_TCP_SYN_RETRIES,
320 .procname = "tcp_syn_retries",
321 .data = &sysctl_tcp_syn_retries,
322 .maxlen = sizeof(int),
324 .proc_handler = &proc_dointvec
327 .ctl_name = NET_TCP_SYNACK_RETRIES,
328 .procname = "tcp_synack_retries",
329 .data = &sysctl_tcp_synack_retries,
330 .maxlen = sizeof(int),
332 .proc_handler = &proc_dointvec
335 .ctl_name = NET_TCP_MAX_ORPHANS,
336 .procname = "tcp_max_orphans",
337 .data = &sysctl_tcp_max_orphans,
338 .maxlen = sizeof(int),
340 .proc_handler = &proc_dointvec
343 .ctl_name = NET_TCP_MAX_TW_BUCKETS,
344 .procname = "tcp_max_tw_buckets",
345 .data = &tcp_death_row.sysctl_max_tw_buckets,
346 .maxlen = sizeof(int),
348 .proc_handler = &proc_dointvec
351 .ctl_name = NET_IPV4_IPFRAG_HIGH_THRESH,
352 .procname = "ipfrag_high_thresh",
353 .data = &ip4_frags_ctl.high_thresh,
354 .maxlen = sizeof(int),
356 .proc_handler = &proc_dointvec
359 .ctl_name = NET_IPV4_IPFRAG_LOW_THRESH,
360 .procname = "ipfrag_low_thresh",
361 .data = &ip4_frags_ctl.low_thresh,
362 .maxlen = sizeof(int),
364 .proc_handler = &proc_dointvec
367 .ctl_name = NET_IPV4_DYNADDR,
368 .procname = "ip_dynaddr",
369 .data = &sysctl_ip_dynaddr,
370 .maxlen = sizeof(int),
372 .proc_handler = &proc_dointvec
375 .ctl_name = NET_IPV4_IPFRAG_TIME,
376 .procname = "ipfrag_time",
377 .data = &ip4_frags_ctl.timeout,
378 .maxlen = sizeof(int),
380 .proc_handler = &proc_dointvec_jiffies,
381 .strategy = &sysctl_jiffies
384 .ctl_name = NET_IPV4_TCP_KEEPALIVE_TIME,
385 .procname = "tcp_keepalive_time",
386 .data = &sysctl_tcp_keepalive_time,
387 .maxlen = sizeof(int),
389 .proc_handler = &proc_dointvec_jiffies,
390 .strategy = &sysctl_jiffies
393 .ctl_name = NET_IPV4_TCP_KEEPALIVE_PROBES,
394 .procname = "tcp_keepalive_probes",
395 .data = &sysctl_tcp_keepalive_probes,
396 .maxlen = sizeof(int),
398 .proc_handler = &proc_dointvec
401 .ctl_name = NET_IPV4_TCP_KEEPALIVE_INTVL,
402 .procname = "tcp_keepalive_intvl",
403 .data = &sysctl_tcp_keepalive_intvl,
404 .maxlen = sizeof(int),
406 .proc_handler = &proc_dointvec_jiffies,
407 .strategy = &sysctl_jiffies
410 .ctl_name = NET_IPV4_TCP_RETRIES1,
411 .procname = "tcp_retries1",
412 .data = &sysctl_tcp_retries1,
413 .maxlen = sizeof(int),
415 .proc_handler = &proc_dointvec_minmax,
416 .strategy = &sysctl_intvec,
417 .extra2 = &tcp_retr1_max
420 .ctl_name = NET_IPV4_TCP_RETRIES2,
421 .procname = "tcp_retries2",
422 .data = &sysctl_tcp_retries2,
423 .maxlen = sizeof(int),
425 .proc_handler = &proc_dointvec
428 .ctl_name = NET_IPV4_TCP_FIN_TIMEOUT,
429 .procname = "tcp_fin_timeout",
430 .data = &sysctl_tcp_fin_timeout,
431 .maxlen = sizeof(int),
433 .proc_handler = &proc_dointvec_jiffies,
434 .strategy = &sysctl_jiffies
436 #ifdef CONFIG_SYN_COOKIES
438 .ctl_name = NET_TCP_SYNCOOKIES,
439 .procname = "tcp_syncookies",
440 .data = &sysctl_tcp_syncookies,
441 .maxlen = sizeof(int),
443 .proc_handler = &proc_dointvec
447 .ctl_name = NET_TCP_TW_RECYCLE,
448 .procname = "tcp_tw_recycle",
449 .data = &tcp_death_row.sysctl_tw_recycle,
450 .maxlen = sizeof(int),
452 .proc_handler = &proc_dointvec
455 .ctl_name = NET_TCP_ABORT_ON_OVERFLOW,
456 .procname = "tcp_abort_on_overflow",
457 .data = &sysctl_tcp_abort_on_overflow,
458 .maxlen = sizeof(int),
460 .proc_handler = &proc_dointvec
463 .ctl_name = NET_TCP_STDURG,
464 .procname = "tcp_stdurg",
465 .data = &sysctl_tcp_stdurg,
466 .maxlen = sizeof(int),
468 .proc_handler = &proc_dointvec
471 .ctl_name = NET_TCP_RFC1337,
472 .procname = "tcp_rfc1337",
473 .data = &sysctl_tcp_rfc1337,
474 .maxlen = sizeof(int),
476 .proc_handler = &proc_dointvec
479 .ctl_name = NET_TCP_MAX_SYN_BACKLOG,
480 .procname = "tcp_max_syn_backlog",
481 .data = &sysctl_max_syn_backlog,
482 .maxlen = sizeof(int),
484 .proc_handler = &proc_dointvec
487 .ctl_name = NET_IPV4_LOCAL_PORT_RANGE,
488 .procname = "ip_local_port_range",
489 .data = &sysctl_local_port_range,
490 .maxlen = sizeof(sysctl_local_port_range),
492 .proc_handler = &ipv4_local_port_range,
493 .strategy = &ipv4_sysctl_local_port_range,
496 .ctl_name = NET_IPV4_ICMP_ECHO_IGNORE_ALL,
497 .procname = "icmp_echo_ignore_all",
498 .data = &sysctl_icmp_echo_ignore_all,
499 .maxlen = sizeof(int),
501 .proc_handler = &proc_dointvec
504 .ctl_name = NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,
505 .procname = "icmp_echo_ignore_broadcasts",
506 .data = &sysctl_icmp_echo_ignore_broadcasts,
507 .maxlen = sizeof(int),
509 .proc_handler = &proc_dointvec
512 .ctl_name = NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
513 .procname = "icmp_ignore_bogus_error_responses",
514 .data = &sysctl_icmp_ignore_bogus_error_responses,
515 .maxlen = sizeof(int),
517 .proc_handler = &proc_dointvec
520 .ctl_name = NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
521 .procname = "icmp_errors_use_inbound_ifaddr",
522 .data = &sysctl_icmp_errors_use_inbound_ifaddr,
523 .maxlen = sizeof(int),
525 .proc_handler = &proc_dointvec
528 .ctl_name = NET_IPV4_ROUTE,
532 .child = ipv4_route_table
534 #ifdef CONFIG_IP_MULTICAST
536 .ctl_name = NET_IPV4_IGMP_MAX_MEMBERSHIPS,
537 .procname = "igmp_max_memberships",
538 .data = &sysctl_igmp_max_memberships,
539 .maxlen = sizeof(int),
541 .proc_handler = &proc_dointvec
546 .ctl_name = NET_IPV4_IGMP_MAX_MSF,
547 .procname = "igmp_max_msf",
548 .data = &sysctl_igmp_max_msf,
549 .maxlen = sizeof(int),
551 .proc_handler = &proc_dointvec
554 .ctl_name = NET_IPV4_INET_PEER_THRESHOLD,
555 .procname = "inet_peer_threshold",
556 .data = &inet_peer_threshold,
557 .maxlen = sizeof(int),
559 .proc_handler = &proc_dointvec
562 .ctl_name = NET_IPV4_INET_PEER_MINTTL,
563 .procname = "inet_peer_minttl",
564 .data = &inet_peer_minttl,
565 .maxlen = sizeof(int),
567 .proc_handler = &proc_dointvec_jiffies,
568 .strategy = &sysctl_jiffies
571 .ctl_name = NET_IPV4_INET_PEER_MAXTTL,
572 .procname = "inet_peer_maxttl",
573 .data = &inet_peer_maxttl,
574 .maxlen = sizeof(int),
576 .proc_handler = &proc_dointvec_jiffies,
577 .strategy = &sysctl_jiffies
580 .ctl_name = NET_IPV4_INET_PEER_GC_MINTIME,
581 .procname = "inet_peer_gc_mintime",
582 .data = &inet_peer_gc_mintime,
583 .maxlen = sizeof(int),
585 .proc_handler = &proc_dointvec_jiffies,
586 .strategy = &sysctl_jiffies
589 .ctl_name = NET_IPV4_INET_PEER_GC_MAXTIME,
590 .procname = "inet_peer_gc_maxtime",
591 .data = &inet_peer_gc_maxtime,
592 .maxlen = sizeof(int),
594 .proc_handler = &proc_dointvec_jiffies,
595 .strategy = &sysctl_jiffies
598 .ctl_name = NET_TCP_ORPHAN_RETRIES,
599 .procname = "tcp_orphan_retries",
600 .data = &sysctl_tcp_orphan_retries,
601 .maxlen = sizeof(int),
603 .proc_handler = &proc_dointvec
606 .ctl_name = NET_TCP_FACK,
607 .procname = "tcp_fack",
608 .data = &sysctl_tcp_fack,
609 .maxlen = sizeof(int),
611 .proc_handler = &proc_dointvec
614 .ctl_name = NET_TCP_REORDERING,
615 .procname = "tcp_reordering",
616 .data = &sysctl_tcp_reordering,
617 .maxlen = sizeof(int),
619 .proc_handler = &proc_dointvec
622 .ctl_name = NET_TCP_ECN,
623 .procname = "tcp_ecn",
624 .data = &sysctl_tcp_ecn,
625 .maxlen = sizeof(int),
627 .proc_handler = &proc_dointvec
630 .ctl_name = NET_TCP_DSACK,
631 .procname = "tcp_dsack",
632 .data = &sysctl_tcp_dsack,
633 .maxlen = sizeof(int),
635 .proc_handler = &proc_dointvec
638 .ctl_name = NET_TCP_MEM,
639 .procname = "tcp_mem",
640 .data = &sysctl_tcp_mem,
641 .maxlen = sizeof(sysctl_tcp_mem),
643 .proc_handler = &proc_dointvec
646 .ctl_name = NET_TCP_WMEM,
647 .procname = "tcp_wmem",
648 .data = &sysctl_tcp_wmem,
649 .maxlen = sizeof(sysctl_tcp_wmem),
651 .proc_handler = &proc_dointvec
654 .ctl_name = NET_TCP_RMEM,
655 .procname = "tcp_rmem",
656 .data = &sysctl_tcp_rmem,
657 .maxlen = sizeof(sysctl_tcp_rmem),
659 .proc_handler = &proc_dointvec
662 .ctl_name = NET_TCP_APP_WIN,
663 .procname = "tcp_app_win",
664 .data = &sysctl_tcp_app_win,
665 .maxlen = sizeof(int),
667 .proc_handler = &proc_dointvec
670 .ctl_name = NET_TCP_ADV_WIN_SCALE,
671 .procname = "tcp_adv_win_scale",
672 .data = &sysctl_tcp_adv_win_scale,
673 .maxlen = sizeof(int),
675 .proc_handler = &proc_dointvec
678 .ctl_name = NET_IPV4_ICMP_RATELIMIT,
679 .procname = "icmp_ratelimit",
680 .data = &sysctl_icmp_ratelimit,
681 .maxlen = sizeof(int),
683 .proc_handler = &proc_dointvec
686 .ctl_name = NET_IPV4_ICMP_RATEMASK,
687 .procname = "icmp_ratemask",
688 .data = &sysctl_icmp_ratemask,
689 .maxlen = sizeof(int),
691 .proc_handler = &proc_dointvec
694 .ctl_name = NET_TCP_TW_REUSE,
695 .procname = "tcp_tw_reuse",
696 .data = &sysctl_tcp_tw_reuse,
697 .maxlen = sizeof(int),
699 .proc_handler = &proc_dointvec
702 .ctl_name = NET_TCP_FRTO,
703 .procname = "tcp_frto",
704 .data = &sysctl_tcp_frto,
705 .maxlen = sizeof(int),
707 .proc_handler = &proc_dointvec
710 .ctl_name = NET_TCP_FRTO_RESPONSE,
711 .procname = "tcp_frto_response",
712 .data = &sysctl_tcp_frto_response,
713 .maxlen = sizeof(int),
715 .proc_handler = &proc_dointvec
718 .ctl_name = NET_TCP_LOW_LATENCY,
719 .procname = "tcp_low_latency",
720 .data = &sysctl_tcp_low_latency,
721 .maxlen = sizeof(int),
723 .proc_handler = &proc_dointvec
726 .ctl_name = NET_IPV4_IPFRAG_SECRET_INTERVAL,
727 .procname = "ipfrag_secret_interval",
728 .data = &ip4_frags_ctl.secret_interval,
729 .maxlen = sizeof(int),
731 .proc_handler = &proc_dointvec_jiffies,
732 .strategy = &sysctl_jiffies
735 .procname = "ipfrag_max_dist",
736 .data = &sysctl_ipfrag_max_dist,
737 .maxlen = sizeof(int),
739 .proc_handler = &proc_dointvec_minmax,
743 .ctl_name = NET_TCP_NO_METRICS_SAVE,
744 .procname = "tcp_no_metrics_save",
745 .data = &sysctl_tcp_nometrics_save,
746 .maxlen = sizeof(int),
748 .proc_handler = &proc_dointvec,
751 .ctl_name = NET_TCP_MODERATE_RCVBUF,
752 .procname = "tcp_moderate_rcvbuf",
753 .data = &sysctl_tcp_moderate_rcvbuf,
754 .maxlen = sizeof(int),
756 .proc_handler = &proc_dointvec,
759 .ctl_name = NET_TCP_TSO_WIN_DIVISOR,
760 .procname = "tcp_tso_win_divisor",
761 .data = &sysctl_tcp_tso_win_divisor,
762 .maxlen = sizeof(int),
764 .proc_handler = &proc_dointvec,
767 .ctl_name = NET_TCP_CONG_CONTROL,
768 .procname = "tcp_congestion_control",
770 .maxlen = TCP_CA_NAME_MAX,
771 .proc_handler = &proc_tcp_congestion_control,
772 .strategy = &sysctl_tcp_congestion_control,
775 .ctl_name = NET_TCP_ABC,
776 .procname = "tcp_abc",
777 .data = &sysctl_tcp_abc,
778 .maxlen = sizeof(int),
780 .proc_handler = &proc_dointvec,
783 .ctl_name = NET_TCP_MTU_PROBING,
784 .procname = "tcp_mtu_probing",
785 .data = &sysctl_tcp_mtu_probing,
786 .maxlen = sizeof(int),
788 .proc_handler = &proc_dointvec,
791 .ctl_name = NET_TCP_BASE_MSS,
792 .procname = "tcp_base_mss",
793 .data = &sysctl_tcp_base_mss,
794 .maxlen = sizeof(int),
796 .proc_handler = &proc_dointvec,
799 .ctl_name = NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS,
800 .procname = "tcp_workaround_signed_windows",
801 .data = &sysctl_tcp_workaround_signed_windows,
802 .maxlen = sizeof(int),
804 .proc_handler = &proc_dointvec
806 #ifdef CONFIG_NET_DMA
808 .ctl_name = NET_TCP_DMA_COPYBREAK,
809 .procname = "tcp_dma_copybreak",
810 .data = &sysctl_tcp_dma_copybreak,
811 .maxlen = sizeof(int),
813 .proc_handler = &proc_dointvec
817 .ctl_name = NET_TCP_SLOW_START_AFTER_IDLE,
818 .procname = "tcp_slow_start_after_idle",
819 .data = &sysctl_tcp_slow_start_after_idle,
820 .maxlen = sizeof(int),
822 .proc_handler = &proc_dointvec
824 #ifdef CONFIG_NETLABEL
826 .ctl_name = NET_CIPSOV4_CACHE_ENABLE,
827 .procname = "cipso_cache_enable",
828 .data = &cipso_v4_cache_enabled,
829 .maxlen = sizeof(int),
831 .proc_handler = &proc_dointvec,
834 .ctl_name = NET_CIPSOV4_CACHE_BUCKET_SIZE,
835 .procname = "cipso_cache_bucket_size",
836 .data = &cipso_v4_cache_bucketsize,
837 .maxlen = sizeof(int),
839 .proc_handler = &proc_dointvec,
842 .ctl_name = NET_CIPSOV4_RBM_OPTFMT,
843 .procname = "cipso_rbm_optfmt",
844 .data = &cipso_v4_rbm_optfmt,
845 .maxlen = sizeof(int),
847 .proc_handler = &proc_dointvec,
850 .ctl_name = NET_CIPSOV4_RBM_STRICTVALID,
851 .procname = "cipso_rbm_strictvalid",
852 .data = &cipso_v4_rbm_strictvalid,
853 .maxlen = sizeof(int),
855 .proc_handler = &proc_dointvec,
857 #endif /* CONFIG_NETLABEL */
859 .procname = "tcp_available_congestion_control",
860 .maxlen = TCP_CA_BUF_MAX,
862 .proc_handler = &proc_tcp_available_congestion_control,
865 .ctl_name = NET_TCP_ALLOWED_CONG_CONTROL,
866 .procname = "tcp_allowed_congestion_control",
867 .maxlen = TCP_CA_BUF_MAX,
869 .proc_handler = &proc_allowed_congestion_control,
870 .strategy = &strategy_allowed_congestion_control,
873 .ctl_name = NET_TCP_MAX_SSTHRESH,
874 .procname = "tcp_max_ssthresh",
875 .data = &sysctl_tcp_max_ssthresh,
876 .maxlen = sizeof(int),
878 .proc_handler = &proc_dointvec,
883 static __initdata struct ctl_path net_ipv4_path[] = {
884 { .procname = "net", .ctl_name = CTL_NET, },
885 { .procname = "ipv4", .ctl_name = NET_IPV4, },
889 static __init int sysctl_ipv4_init(void)
891 struct ctl_table_header *hdr;
893 hdr = register_sysctl_paths(net_ipv4_path, ipv4_table);
894 return hdr == NULL ? -ENOMEM : 0;
897 __initcall(sysctl_ipv4_init);