sysctl_net_ipv4.c revision 1c2fb7f93cb20621772bf304f3dba0849942e5db 
1/*
2 * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem.
3 *
4 * $Id: sysctl_net_ipv4.c,v 1.50 2001/10/20 00:00:11 davem Exp $
5 *
6 * Begun April 1, 1996, Mike Shaver.
7 * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS]
8 */
9
10#include <linux/mm.h>
11#include <linux/module.h>
12#include <linux/sysctl.h>
13#include <linux/config.h>
14#include <net/snmp.h>
15#include <net/ip.h>
16#include <net/route.h>
17#include <net/tcp.h>
18
19/* From af_inet.c */
20extern int sysctl_ip_nonlocal_bind;
21
22/* From icmp.c */
23extern int sysctl_icmp_echo_ignore_all;
24extern int sysctl_icmp_echo_ignore_broadcasts;
25extern int sysctl_icmp_ignore_bogus_error_responses;
26extern int sysctl_icmp_errors_use_inbound_ifaddr;
27
28/* From ip_fragment.c */
29extern int sysctl_ipfrag_low_thresh;
30extern int sysctl_ipfrag_high_thresh;
31extern int sysctl_ipfrag_time;
32extern int sysctl_ipfrag_secret_interval;
33
34/* From ip_output.c */
35extern int sysctl_ip_dynaddr;
36
37/* From icmp.c */
38extern int sysctl_icmp_ratelimit;
39extern int sysctl_icmp_ratemask;
40
41/* From igmp.c */
42extern int sysctl_igmp_max_memberships;
43extern int sysctl_igmp_max_msf;
44
45/* From inetpeer.c */
46extern int inet_peer_threshold;
47extern int inet_peer_minttl;
48extern int inet_peer_maxttl;
49extern int inet_peer_gc_mintime;
50extern int inet_peer_gc_maxtime;
51
52#ifdef CONFIG_SYSCTL
53static int tcp_retr1_max = 255;
54static int ip_local_port_range_min[] = { 1, 1 };
55static int ip_local_port_range_max[] = { 65535, 65535 };
56#endif
57
58struct ipv4_config ipv4_config;
59
60extern ctl_table ipv4_route_table[];
61
62#ifdef CONFIG_SYSCTL
63
64static
65int ipv4_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
66			void __user *buffer, size_t *lenp, loff_t *ppos)
67{
68	int val = ipv4_devconf.forwarding;
69	int ret;
70
71	ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
72
73	if (write && ipv4_devconf.forwarding != val)
74		inet_forward_change();
75
76	return ret;
77}
78
79static int ipv4_sysctl_forward_strategy(ctl_table *table,
80			 int __user *name, int nlen,
81			 void __user *oldval, size_t __user *oldlenp,
82			 void __user *newval, size_t newlen,
83			 void **context)
84{
85	int *valp = table->data;
86	int new;
87
88	if (!newval || !newlen)
89		return 0;
90
91	if (newlen != sizeof(int))
92		return -EINVAL;
93
94	if (get_user(new, (int __user *)newval))
95		return -EFAULT;
96
97	if (new == *valp)
98		return 0;
99
100	if (oldval && oldlenp) {
101		size_t len;
102
103		if (get_user(len, oldlenp))
104			return -EFAULT;
105
106		if (len) {
107			if (len > table->maxlen)
108				len = table->maxlen;
109			if (copy_to_user(oldval, valp, len))
110				return -EFAULT;
111			if (put_user(len, oldlenp))
112				return -EFAULT;
113		}
114	}
115
116	*valp = new;
117	inet_forward_change();
118	return 1;
119}
120
121ctl_table ipv4_table[] = {
122        {
123		.ctl_name	= NET_IPV4_TCP_TIMESTAMPS,
124		.procname	= "tcp_timestamps",
125		.data		= &sysctl_tcp_timestamps,
126		.maxlen		= sizeof(int),
127		.mode		= 0644,
128		.proc_handler	= &proc_dointvec
129	},
130        {
131		.ctl_name	= NET_IPV4_TCP_WINDOW_SCALING,
132		.procname	= "tcp_window_scaling",
133		.data		= &sysctl_tcp_window_scaling,
134		.maxlen		= sizeof(int),
135		.mode		= 0644,
136		.proc_handler	= &proc_dointvec
137	},
138        {
139		.ctl_name	= NET_IPV4_TCP_SACK,
140		.procname	= "tcp_sack",
141		.data		= &sysctl_tcp_sack,
142		.maxlen		= sizeof(int),
143		.mode		= 0644,
144		.proc_handler	= &proc_dointvec
145	},
146        {
147		.ctl_name	= NET_IPV4_TCP_RETRANS_COLLAPSE,
148		.procname	= "tcp_retrans_collapse",
149		.data		= &sysctl_tcp_retrans_collapse,
150		.maxlen		= sizeof(int),
151		.mode		= 0644,
152		.proc_handler	= &proc_dointvec
153	},
154        {
155		.ctl_name	= NET_IPV4_FORWARD,
156		.procname	= "ip_forward",
157		.data		= &ipv4_devconf.forwarding,
158		.maxlen		= sizeof(int),
159		.mode		= 0644,
160		.proc_handler	= &ipv4_sysctl_forward,
161		.strategy	= &ipv4_sysctl_forward_strategy
162	},
163        {
164		.ctl_name	= NET_IPV4_DEFAULT_TTL,
165		.procname	= "ip_default_ttl",
166 		.data		= &sysctl_ip_default_ttl,
167		.maxlen		= sizeof(int),
168		.mode		= 0644,
169		.proc_handler	= &ipv4_doint_and_flush,
170		.strategy	= &ipv4_doint_and_flush_strategy,
171	},
172        {
173		.ctl_name	= NET_IPV4_AUTOCONFIG,
174		.procname	= "ip_autoconfig",
175		.data		= &ipv4_config.autoconfig,
176		.maxlen		= sizeof(int),
177		.mode		= 0644,
178		.proc_handler	= &proc_dointvec
179	},
180        {
181		.ctl_name	= NET_IPV4_NO_PMTU_DISC,
182		.procname	= "ip_no_pmtu_disc",
183		.data		= &ipv4_config.no_pmtu_disc,
184		.maxlen		= sizeof(int),
185		.mode		= 0644,
186		.proc_handler	= &proc_dointvec
187	},
188	{
189		.ctl_name	= NET_IPV4_NONLOCAL_BIND,
190		.procname	= "ip_nonlocal_bind",
191		.data		= &sysctl_ip_nonlocal_bind,
192		.maxlen		= sizeof(int),
193		.mode		= 0644,
194		.proc_handler	= &proc_dointvec
195	},
196	{
197		.ctl_name	= NET_IPV4_TCP_SYN_RETRIES,
198		.procname	= "tcp_syn_retries",
199		.data		= &sysctl_tcp_syn_retries,
200		.maxlen		= sizeof(int),
201		.mode		= 0644,
202		.proc_handler	= &proc_dointvec
203	},
204	{
205		.ctl_name	= NET_TCP_SYNACK_RETRIES,
206		.procname	= "tcp_synack_retries",
207		.data		= &sysctl_tcp_synack_retries,
208		.maxlen		= sizeof(int),
209		.mode		= 0644,
210		.proc_handler	= &proc_dointvec
211	},
212	{
213		.ctl_name	= NET_TCP_MAX_ORPHANS,
214		.procname	= "tcp_max_orphans",
215		.data		= &sysctl_tcp_max_orphans,
216		.maxlen		= sizeof(int),
217		.mode		= 0644,
218		.proc_handler	= &proc_dointvec
219	},
220	{
221		.ctl_name	= NET_TCP_MAX_TW_BUCKETS,
222		.procname	= "tcp_max_tw_buckets",
223		.data		= &sysctl_tcp_max_tw_buckets,
224		.maxlen		= sizeof(int),
225		.mode		= 0644,
226		.proc_handler	= &proc_dointvec
227	},
228	{
229		.ctl_name	= NET_IPV4_IPFRAG_HIGH_THRESH,
230		.procname	= "ipfrag_high_thresh",
231		.data		= &sysctl_ipfrag_high_thresh,
232		.maxlen		= sizeof(int),
233		.mode		= 0644,
234		.proc_handler	= &proc_dointvec
235	},
236	{
237		.ctl_name	= NET_IPV4_IPFRAG_LOW_THRESH,
238		.procname	= "ipfrag_low_thresh",
239		.data		= &sysctl_ipfrag_low_thresh,
240		.maxlen		= sizeof(int),
241		.mode		= 0644,
242		.proc_handler	= &proc_dointvec
243	},
244	{
245		.ctl_name	= NET_IPV4_DYNADDR,
246		.procname	= "ip_dynaddr",
247		.data		= &sysctl_ip_dynaddr,
248		.maxlen		= sizeof(int),
249		.mode		= 0644,
250		.proc_handler	= &proc_dointvec
251	},
252	{
253		.ctl_name	= NET_IPV4_IPFRAG_TIME,
254		.procname	= "ipfrag_time",
255		.data		= &sysctl_ipfrag_time,
256		.maxlen		= sizeof(int),
257		.mode		= 0644,
258		.proc_handler	= &proc_dointvec_jiffies,
259		.strategy	= &sysctl_jiffies
260	},
261	{
262		.ctl_name	= NET_IPV4_TCP_KEEPALIVE_TIME,
263		.procname	= "tcp_keepalive_time",
264		.data		= &sysctl_tcp_keepalive_time,
265		.maxlen		= sizeof(int),
266		.mode		= 0644,
267		.proc_handler	= &proc_dointvec_jiffies,
268		.strategy	= &sysctl_jiffies
269	},
270	{
271		.ctl_name	= NET_IPV4_TCP_KEEPALIVE_PROBES,
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		.ctl_name	= NET_IPV4_TCP_KEEPALIVE_INTVL,
280		.procname	= "tcp_keepalive_intvl",
281		.data		= &sysctl_tcp_keepalive_intvl,
282		.maxlen		= sizeof(int),
283		.mode		= 0644,
284		.proc_handler	= &proc_dointvec_jiffies,
285		.strategy	= &sysctl_jiffies
286	},
287	{
288		.ctl_name	= NET_IPV4_TCP_RETRIES1,
289		.procname	= "tcp_retries1",
290		.data		= &sysctl_tcp_retries1,
291		.maxlen		= sizeof(int),
292		.mode		= 0644,
293		.proc_handler	= &proc_dointvec_minmax,
294		.strategy	= &sysctl_intvec,
295		.extra2		= &tcp_retr1_max
296	},
297	{
298		.ctl_name	= NET_IPV4_TCP_RETRIES2,
299		.procname	= "tcp_retries2",
300		.data		= &sysctl_tcp_retries2,
301		.maxlen		= sizeof(int),
302		.mode		= 0644,
303		.proc_handler	= &proc_dointvec
304	},
305	{
306		.ctl_name	= NET_IPV4_TCP_FIN_TIMEOUT,
307		.procname	= "tcp_fin_timeout",
308		.data		= &sysctl_tcp_fin_timeout,
309		.maxlen		= sizeof(int),
310		.mode		= 0644,
311		.proc_handler	= &proc_dointvec_jiffies,
312		.strategy	= &sysctl_jiffies
313	},
314#ifdef CONFIG_SYN_COOKIES
315	{
316		.ctl_name	= NET_TCP_SYNCOOKIES,
317		.procname	= "tcp_syncookies",
318		.data		= &sysctl_tcp_syncookies,
319		.maxlen		= sizeof(int),
320		.mode		= 0644,
321		.proc_handler	= &proc_dointvec
322	},
323#endif
324	{
325		.ctl_name	= NET_TCP_TW_RECYCLE,
326		.procname	= "tcp_tw_recycle",
327		.data		= &sysctl_tcp_tw_recycle,
328		.maxlen		= sizeof(int),
329		.mode		= 0644,
330		.proc_handler	= &proc_dointvec
331	},
332	{
333		.ctl_name	= NET_TCP_ABORT_ON_OVERFLOW,
334		.procname	= "tcp_abort_on_overflow",
335		.data		= &sysctl_tcp_abort_on_overflow,
336		.maxlen		= sizeof(int),
337		.mode		= 0644,
338		.proc_handler	= &proc_dointvec
339	},
340	{
341		.ctl_name	= NET_TCP_STDURG,
342		.procname	= "tcp_stdurg",
343		.data		= &sysctl_tcp_stdurg,
344		.maxlen		= sizeof(int),
345		.mode		= 0644,
346		.proc_handler	= &proc_dointvec
347	},
348	{
349		.ctl_name	= NET_TCP_RFC1337,
350		.procname	= "tcp_rfc1337",
351		.data		= &sysctl_tcp_rfc1337,
352		.maxlen		= sizeof(int),
353		.mode		= 0644,
354		.proc_handler	= &proc_dointvec
355	},
356	{
357		.ctl_name	= NET_TCP_MAX_SYN_BACKLOG,
358		.procname	= "tcp_max_syn_backlog",
359		.data		= &sysctl_max_syn_backlog,
360		.maxlen		= sizeof(int),
361		.mode		= 0644,
362		.proc_handler	= &proc_dointvec
363	},
364	{
365		.ctl_name	= NET_IPV4_LOCAL_PORT_RANGE,
366		.procname	= "ip_local_port_range",
367		.data		= &sysctl_local_port_range,
368		.maxlen		= sizeof(sysctl_local_port_range),
369		.mode		= 0644,
370		.proc_handler	= &proc_dointvec_minmax,
371		.strategy	= &sysctl_intvec,
372		.extra1		= ip_local_port_range_min,
373		.extra2		= ip_local_port_range_max
374	},
375	{
376		.ctl_name	= NET_IPV4_ICMP_ECHO_IGNORE_ALL,
377		.procname	= "icmp_echo_ignore_all",
378		.data		= &sysctl_icmp_echo_ignore_all,
379		.maxlen		= sizeof(int),
380		.mode		= 0644,
381		.proc_handler	= &proc_dointvec
382	},
383	{
384		.ctl_name	= NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,
385		.procname	= "icmp_echo_ignore_broadcasts",
386		.data		= &sysctl_icmp_echo_ignore_broadcasts,
387		.maxlen		= sizeof(int),
388		.mode		= 0644,
389		.proc_handler	= &proc_dointvec
390	},
391	{
392		.ctl_name	= NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
393		.procname	= "icmp_ignore_bogus_error_responses",
394		.data		= &sysctl_icmp_ignore_bogus_error_responses,
395		.maxlen		= sizeof(int),
396		.mode		= 0644,
397		.proc_handler	= &proc_dointvec
398	},
399	{
400		.ctl_name	= NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
401		.procname	= "icmp_errors_use_inbound_ifaddr",
402		.data		= &sysctl_icmp_errors_use_inbound_ifaddr,
403		.maxlen		= sizeof(int),
404		.mode		= 0644,
405		.proc_handler	= &proc_dointvec
406	},
407	{
408		.ctl_name	= NET_IPV4_ROUTE,
409		.procname	= "route",
410		.maxlen		= 0,
411		.mode		= 0555,
412		.child		= ipv4_route_table
413	},
414#ifdef CONFIG_IP_MULTICAST
415	{
416		.ctl_name	= NET_IPV4_IGMP_MAX_MEMBERSHIPS,
417		.procname	= "igmp_max_memberships",
418		.data		= &sysctl_igmp_max_memberships,
419		.maxlen		= sizeof(int),
420		.mode		= 0644,
421		.proc_handler	= &proc_dointvec
422	},
423
424#endif
425	{
426		.ctl_name	= NET_IPV4_IGMP_MAX_MSF,
427		.procname	= "igmp_max_msf",
428		.data		= &sysctl_igmp_max_msf,
429		.maxlen		= sizeof(int),
430		.mode		= 0644,
431		.proc_handler	= &proc_dointvec
432	},
433	{
434		.ctl_name	= NET_IPV4_INET_PEER_THRESHOLD,
435		.procname	= "inet_peer_threshold",
436		.data		= &inet_peer_threshold,
437		.maxlen		= sizeof(int),
438		.mode		= 0644,
439		.proc_handler	= &proc_dointvec
440	},
441	{
442		.ctl_name	= NET_IPV4_INET_PEER_MINTTL,
443		.procname	= "inet_peer_minttl",
444		.data		= &inet_peer_minttl,
445		.maxlen		= sizeof(int),
446		.mode		= 0644,
447		.proc_handler	= &proc_dointvec_jiffies,
448		.strategy	= &sysctl_jiffies
449	},
450	{
451		.ctl_name	= NET_IPV4_INET_PEER_MAXTTL,
452		.procname	= "inet_peer_maxttl",
453		.data		= &inet_peer_maxttl,
454		.maxlen		= sizeof(int),
455		.mode		= 0644,
456		.proc_handler	= &proc_dointvec_jiffies,
457		.strategy	= &sysctl_jiffies
458	},
459	{
460		.ctl_name	= NET_IPV4_INET_PEER_GC_MINTIME,
461		.procname	= "inet_peer_gc_mintime",
462		.data		= &inet_peer_gc_mintime,
463		.maxlen		= sizeof(int),
464		.mode		= 0644,
465		.proc_handler	= &proc_dointvec_jiffies,
466		.strategy	= &sysctl_jiffies
467	},
468	{
469		.ctl_name	= NET_IPV4_INET_PEER_GC_MAXTIME,
470		.procname	= "inet_peer_gc_maxtime",
471		.data		= &inet_peer_gc_maxtime,
472		.maxlen		= sizeof(int),
473		.mode		= 0644,
474		.proc_handler	= &proc_dointvec_jiffies,
475		.strategy	= &sysctl_jiffies
476	},
477	{
478		.ctl_name	= NET_TCP_ORPHAN_RETRIES,
479		.procname	= "tcp_orphan_retries",
480		.data		= &sysctl_tcp_orphan_retries,
481		.maxlen		= sizeof(int),
482		.mode		= 0644,
483		.proc_handler	= &proc_dointvec
484	},
485	{
486		.ctl_name	= NET_TCP_FACK,
487		.procname	= "tcp_fack",
488		.data		= &sysctl_tcp_fack,
489		.maxlen		= sizeof(int),
490		.mode		= 0644,
491		.proc_handler	= &proc_dointvec
492	},
493	{
494		.ctl_name	= NET_TCP_REORDERING,
495		.procname	= "tcp_reordering",
496		.data		= &sysctl_tcp_reordering,
497		.maxlen		= sizeof(int),
498		.mode		= 0644,
499		.proc_handler	= &proc_dointvec
500	},
501	{
502		.ctl_name	= NET_TCP_ECN,
503		.procname	= "tcp_ecn",
504		.data		= &sysctl_tcp_ecn,
505		.maxlen		= sizeof(int),
506		.mode		= 0644,
507		.proc_handler	= &proc_dointvec
508	},
509	{
510		.ctl_name	= NET_TCP_DSACK,
511		.procname	= "tcp_dsack",
512		.data		= &sysctl_tcp_dsack,
513		.maxlen		= sizeof(int),
514		.mode		= 0644,
515		.proc_handler	= &proc_dointvec
516	},
517	{
518		.ctl_name	= NET_TCP_MEM,
519		.procname	= "tcp_mem",
520		.data		= &sysctl_tcp_mem,
521		.maxlen		= sizeof(sysctl_tcp_mem),
522		.mode		= 0644,
523		.proc_handler	= &proc_dointvec
524	},
525	{
526		.ctl_name	= NET_TCP_WMEM,
527		.procname	= "tcp_wmem",
528		.data		= &sysctl_tcp_wmem,
529		.maxlen		= sizeof(sysctl_tcp_wmem),
530		.mode		= 0644,
531		.proc_handler	= &proc_dointvec
532	},
533	{
534		.ctl_name	= NET_TCP_RMEM,
535		.procname	= "tcp_rmem",
536		.data		= &sysctl_tcp_rmem,
537		.maxlen		= sizeof(sysctl_tcp_rmem),
538		.mode		= 0644,
539		.proc_handler	= &proc_dointvec
540	},
541	{
542		.ctl_name	= NET_TCP_APP_WIN,
543		.procname	= "tcp_app_win",
544		.data		= &sysctl_tcp_app_win,
545		.maxlen		= sizeof(int),
546		.mode		= 0644,
547		.proc_handler	= &proc_dointvec
548	},
549	{
550		.ctl_name	= NET_TCP_ADV_WIN_SCALE,
551		.procname	= "tcp_adv_win_scale",
552		.data		= &sysctl_tcp_adv_win_scale,
553		.maxlen		= sizeof(int),
554		.mode		= 0644,
555		.proc_handler	= &proc_dointvec
556	},
557	{
558		.ctl_name	= NET_IPV4_ICMP_RATELIMIT,
559		.procname	= "icmp_ratelimit",
560		.data		= &sysctl_icmp_ratelimit,
561		.maxlen		= sizeof(int),
562		.mode		= 0644,
563		.proc_handler	= &proc_dointvec
564	},
565	{
566		.ctl_name	= NET_IPV4_ICMP_RATEMASK,
567		.procname	= "icmp_ratemask",
568		.data		= &sysctl_icmp_ratemask,
569		.maxlen		= sizeof(int),
570		.mode		= 0644,
571		.proc_handler	= &proc_dointvec
572	},
573	{
574		.ctl_name	= NET_TCP_TW_REUSE,
575		.procname	= "tcp_tw_reuse",
576		.data		= &sysctl_tcp_tw_reuse,
577		.maxlen		= sizeof(int),
578		.mode		= 0644,
579		.proc_handler	= &proc_dointvec
580	},
581	{
582		.ctl_name	= NET_TCP_FRTO,
583		.procname	= "tcp_frto",
584		.data		= &sysctl_tcp_frto,
585		.maxlen		= sizeof(int),
586		.mode		= 0644,
587		.proc_handler	= &proc_dointvec
588	},
589	{
590		.ctl_name	= NET_TCP_LOW_LATENCY,
591		.procname	= "tcp_low_latency",
592		.data		= &sysctl_tcp_low_latency,
593		.maxlen		= sizeof(int),
594		.mode		= 0644,
595		.proc_handler	= &proc_dointvec
596	},
597	{
598		.ctl_name	= NET_IPV4_IPFRAG_SECRET_INTERVAL,
599		.procname	= "ipfrag_secret_interval",
600		.data		= &sysctl_ipfrag_secret_interval,
601		.maxlen		= sizeof(int),
602		.mode		= 0644,
603		.proc_handler	= &proc_dointvec_jiffies,
604		.strategy	= &sysctl_jiffies
605	},
606	{
607		.ctl_name	= NET_TCP_NO_METRICS_SAVE,
608		.procname	= "tcp_no_metrics_save",
609		.data		= &sysctl_tcp_nometrics_save,
610		.maxlen		= sizeof(int),
611		.mode		= 0644,
612		.proc_handler	= &proc_dointvec,
613	},
614	{
615		.ctl_name	= NET_TCP_WESTWOOD,
616		.procname	= "tcp_westwood",
617		.data		= &sysctl_tcp_westwood,
618		.maxlen		= sizeof(int),
619		.mode		= 0644,
620		.proc_handler	= &proc_dointvec,
621	},
622	{
623		.ctl_name	= NET_TCP_VEGAS,
624		.procname	= "tcp_vegas_cong_avoid",
625		.data		= &sysctl_tcp_vegas_cong_avoid,
626		.maxlen		= sizeof(int),
627		.mode		= 0644,
628		.proc_handler	= &proc_dointvec,
629	},
630	{
631		.ctl_name	= NET_TCP_VEGAS_ALPHA,
632		.procname	= "tcp_vegas_alpha",
633		.data		= &sysctl_tcp_vegas_alpha,
634		.maxlen		= sizeof(int),
635		.mode		= 0644,
636		.proc_handler	= &proc_dointvec,
637	},
638	{
639		.ctl_name	= NET_TCP_VEGAS_BETA,
640		.procname	= "tcp_vegas_beta",
641		.data		= &sysctl_tcp_vegas_beta,
642		.maxlen		= sizeof(int),
643		.mode		= 0644,
644		.proc_handler	= &proc_dointvec,
645	},
646	{
647		.ctl_name	= NET_TCP_VEGAS_GAMMA,
648		.procname	= "tcp_vegas_gamma",
649		.data		= &sysctl_tcp_vegas_gamma,
650		.maxlen		= sizeof(int),
651		.mode		= 0644,
652		.proc_handler	= &proc_dointvec,
653	},
654	{
655		.ctl_name	= NET_TCP_BIC,
656		.procname	= "tcp_bic",
657		.data		= &sysctl_tcp_bic,
658		.maxlen		= sizeof(int),
659		.mode		= 0644,
660		.proc_handler	= &proc_dointvec,
661	},
662	{
663		.ctl_name	= NET_TCP_BIC_FAST_CONVERGENCE,
664		.procname	= "tcp_bic_fast_convergence",
665		.data		= &sysctl_tcp_bic_fast_convergence,
666		.maxlen		= sizeof(int),
667		.mode		= 0644,
668		.proc_handler	= &proc_dointvec,
669	},
670	{
671		.ctl_name	= NET_TCP_BIC_LOW_WINDOW,
672		.procname	= "tcp_bic_low_window",
673		.data		= &sysctl_tcp_bic_low_window,
674		.maxlen		= sizeof(int),
675		.mode		= 0644,
676		.proc_handler	= &proc_dointvec,
677	},
678	{
679		.ctl_name	= NET_TCP_MODERATE_RCVBUF,
680		.procname	= "tcp_moderate_rcvbuf",
681		.data		= &sysctl_tcp_moderate_rcvbuf,
682		.maxlen		= sizeof(int),
683		.mode		= 0644,
684		.proc_handler	= &proc_dointvec,
685	},
686	{
687		.ctl_name	= NET_TCP_TSO_WIN_DIVISOR,
688		.procname	= "tcp_tso_win_divisor",
689		.data		= &sysctl_tcp_tso_win_divisor,
690		.maxlen		= sizeof(int),
691		.mode		= 0644,
692		.proc_handler	= &proc_dointvec,
693	},
694	{
695		.ctl_name	= NET_TCP_BIC_BETA,
696		.procname	= "tcp_bic_beta",
697		.data		= &sysctl_tcp_bic_beta,
698		.maxlen		= sizeof(int),
699		.mode		= 0644,
700		.proc_handler	= &proc_dointvec,
701	},
702	{ .ctl_name = 0 }
703};
704
705#endif /* CONFIG_SYSCTL */
706
707EXPORT_SYMBOL(ipv4_config);
708