53ef0f4bbdaa507137d0a99b7a120fe43bddf1bb
[linux-2.6.git] / net / ipv4 / sysctl_net_ipv4.c
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/igmp.h>
14 #include <linux/inetdevice.h>
15 #include <net/snmp.h>
16 #include <net/icmp.h>
17 #include <net/ip.h>
18 #include <net/route.h>
19 #include <net/tcp.h>
20 #include <net/cipso_ipv4.h>
21
22 /* From af_inet.c */
23 extern int sysctl_ip_nonlocal_bind;
24
25 #ifdef CONFIG_SYSCTL
26 static int zero;
27 static int tcp_retr1_max = 255;
28 static int ip_local_port_range_min[] = { 1, 1 };
29 static int ip_local_port_range_max[] = { 65535, 65535 };
30 #endif
31
32 struct ipv4_config ipv4_config;
33
34 #ifdef CONFIG_SYSCTL
35
36 static
37 int ipv4_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
38                         void __user *buffer, size_t *lenp, loff_t *ppos)
39 {
40         int val = IPV4_DEVCONF_ALL(FORWARDING);
41         int ret;
42
43         ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
44
45         if (write && IPV4_DEVCONF_ALL(FORWARDING) != val)
46                 inet_forward_change();
47
48         return ret;
49 }
50
51 static int ipv4_sysctl_forward_strategy(ctl_table *table,
52                          int __user *name, int nlen,
53                          void __user *oldval, size_t __user *oldlenp,
54                          void __user *newval, size_t newlen)
55 {
56         int *valp = table->data;
57         int new;
58
59         if (!newval || !newlen)
60                 return 0;
61
62         if (newlen != sizeof(int))
63                 return -EINVAL;
64
65         if (get_user(new, (int __user *)newval))
66                 return -EFAULT;
67
68         if (new == *valp)
69                 return 0;
70
71         if (oldval && oldlenp) {
72                 size_t len;
73
74                 if (get_user(len, oldlenp))
75                         return -EFAULT;
76
77                 if (len) {
78                         if (len > table->maxlen)
79                                 len = table->maxlen;
80                         if (copy_to_user(oldval, valp, len))
81                                 return -EFAULT;
82                         if (put_user(len, oldlenp))
83                                 return -EFAULT;
84                 }
85         }
86
87         *valp = new;
88         inet_forward_change();
89         return 1;
90 }
91
92 static int proc_tcp_congestion_control(ctl_table *ctl, int write, struct file * filp,
93                                        void __user *buffer, size_t *lenp, loff_t *ppos)
94 {
95         char val[TCP_CA_NAME_MAX];
96         ctl_table tbl = {
97                 .data = val,
98                 .maxlen = TCP_CA_NAME_MAX,
99         };
100         int ret;
101
102         tcp_get_default_congestion_control(val);
103
104         ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
105         if (write && ret == 0)
106                 ret = tcp_set_default_congestion_control(val);
107         return ret;
108 }
109
110 static int sysctl_tcp_congestion_control(ctl_table *table, int __user *name,
111                                          int nlen, void __user *oldval,
112                                          size_t __user *oldlenp,
113                                          void __user *newval, size_t newlen)
114 {
115         char val[TCP_CA_NAME_MAX];
116         ctl_table tbl = {
117                 .data = val,
118                 .maxlen = TCP_CA_NAME_MAX,
119         };
120         int ret;
121
122         tcp_get_default_congestion_control(val);
123         ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen);
124         if (ret == 0 && newval && newlen)
125                 ret = tcp_set_default_congestion_control(val);
126         return ret;
127 }
128
129 static int proc_tcp_available_congestion_control(ctl_table *ctl,
130                                                  int write, struct file * filp,
131                                                  void __user *buffer, size_t *lenp,
132                                                  loff_t *ppos)
133 {
134         ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
135         int ret;
136
137         tbl.data = kmalloc(tbl.maxlen, GFP_USER);
138         if (!tbl.data)
139                 return -ENOMEM;
140         tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
141         ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
142         kfree(tbl.data);
143         return ret;
144 }
145
146 static int proc_allowed_congestion_control(ctl_table *ctl,
147                                            int write, struct file * filp,
148                                            void __user *buffer, size_t *lenp,
149                                            loff_t *ppos)
150 {
151         ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
152         int ret;
153
154         tbl.data = kmalloc(tbl.maxlen, GFP_USER);
155         if (!tbl.data)
156                 return -ENOMEM;
157
158         tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
159         ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
160         if (write && ret == 0)
161                 ret = tcp_set_allowed_congestion_control(tbl.data);
162         kfree(tbl.data);
163         return ret;
164 }
165
166 static int strategy_allowed_congestion_control(ctl_table *table, int __user *name,
167                                                int nlen, void __user *oldval,
168                                                size_t __user *oldlenp,
169                                                void __user *newval,
170                                                size_t newlen)
171 {
172         ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
173         int ret;
174
175         tbl.data = kmalloc(tbl.maxlen, GFP_USER);
176         if (!tbl.data)
177                 return -ENOMEM;
178
179         tcp_get_available_congestion_control(tbl.data, tbl.maxlen);
180         ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen);
181         if (ret == 0 && newval && newlen)
182                 ret = tcp_set_allowed_congestion_control(tbl.data);
183         kfree(tbl.data);
184
185         return ret;
186
187 }
188
189 ctl_table ipv4_table[] = {
190         {
191                 .ctl_name       = NET_IPV4_TCP_TIMESTAMPS,
192                 .procname       = "tcp_timestamps",
193                 .data           = &sysctl_tcp_timestamps,
194                 .maxlen         = sizeof(int),
195                 .mode           = 0644,
196                 .proc_handler   = &proc_dointvec
197         },
198         {
199                 .ctl_name       = NET_IPV4_TCP_WINDOW_SCALING,
200                 .procname       = "tcp_window_scaling",
201                 .data           = &sysctl_tcp_window_scaling,
202                 .maxlen         = sizeof(int),
203                 .mode           = 0644,
204                 .proc_handler   = &proc_dointvec
205         },
206         {
207                 .ctl_name       = NET_IPV4_TCP_SACK,
208                 .procname       = "tcp_sack",
209                 .data           = &sysctl_tcp_sack,
210                 .maxlen         = sizeof(int),
211                 .mode           = 0644,
212                 .proc_handler   = &proc_dointvec
213         },
214         {
215                 .ctl_name       = NET_IPV4_TCP_RETRANS_COLLAPSE,
216                 .procname       = "tcp_retrans_collapse",
217                 .data           = &sysctl_tcp_retrans_collapse,
218                 .maxlen         = sizeof(int),
219                 .mode           = 0644,
220                 .proc_handler   = &proc_dointvec
221         },
222         {
223                 .ctl_name       = NET_IPV4_FORWARD,
224                 .procname       = "ip_forward",
225                 .data           = &IPV4_DEVCONF_ALL(FORWARDING),
226                 .maxlen         = sizeof(int),
227                 .mode           = 0644,
228                 .proc_handler   = &ipv4_sysctl_forward,
229                 .strategy       = &ipv4_sysctl_forward_strategy
230         },
231         {
232                 .ctl_name       = NET_IPV4_DEFAULT_TTL,
233                 .procname       = "ip_default_ttl",
234                 .data           = &sysctl_ip_default_ttl,
235                 .maxlen         = sizeof(int),
236                 .mode           = 0644,
237                 .proc_handler   = &ipv4_doint_and_flush,
238                 .strategy       = &ipv4_doint_and_flush_strategy,
239         },
240         {
241                 .ctl_name       = NET_IPV4_NO_PMTU_DISC,
242                 .procname       = "ip_no_pmtu_disc",
243                 .data           = &ipv4_config.no_pmtu_disc,
244                 .maxlen         = sizeof(int),
245                 .mode           = 0644,
246                 .proc_handler   = &proc_dointvec
247         },
248         {
249                 .ctl_name       = NET_IPV4_NONLOCAL_BIND,
250                 .procname       = "ip_nonlocal_bind",
251                 .data           = &sysctl_ip_nonlocal_bind,
252                 .maxlen         = sizeof(int),
253                 .mode           = 0644,
254                 .proc_handler   = &proc_dointvec
255         },
256         {
257                 .ctl_name       = NET_IPV4_TCP_SYN_RETRIES,
258                 .procname       = "tcp_syn_retries",
259                 .data           = &sysctl_tcp_syn_retries,
260                 .maxlen         = sizeof(int),
261                 .mode           = 0644,
262                 .proc_handler   = &proc_dointvec
263         },
264         {
265                 .ctl_name       = NET_TCP_SYNACK_RETRIES,
266                 .procname       = "tcp_synack_retries",
267                 .data           = &sysctl_tcp_synack_retries,
268                 .maxlen         = sizeof(int),
269                 .mode           = 0644,
270                 .proc_handler   = &proc_dointvec
271         },
272         {
273                 .ctl_name       = NET_TCP_MAX_ORPHANS,
274                 .procname       = "tcp_max_orphans",
275                 .data           = &sysctl_tcp_max_orphans,
276                 .maxlen         = sizeof(int),
277                 .mode           = 0644,
278                 .proc_handler   = &proc_dointvec
279         },
280         {
281                 .ctl_name       = NET_TCP_MAX_TW_BUCKETS,
282                 .procname       = "tcp_max_tw_buckets",
283                 .data           = &tcp_death_row.sysctl_max_tw_buckets,
284                 .maxlen         = sizeof(int),
285                 .mode           = 0644,
286                 .proc_handler   = &proc_dointvec
287         },
288         {
289                 .ctl_name       = NET_IPV4_IPFRAG_HIGH_THRESH,
290                 .procname       = "ipfrag_high_thresh",
291                 .data           = &sysctl_ipfrag_high_thresh,
292                 .maxlen         = sizeof(int),
293                 .mode           = 0644,
294                 .proc_handler   = &proc_dointvec
295         },
296         {
297                 .ctl_name       = NET_IPV4_IPFRAG_LOW_THRESH,
298                 .procname       = "ipfrag_low_thresh",
299                 .data           = &sysctl_ipfrag_low_thresh,
300                 .maxlen         = sizeof(int),
301                 .mode           = 0644,
302                 .proc_handler   = &proc_dointvec
303         },
304         {
305                 .ctl_name       = NET_IPV4_DYNADDR,
306                 .procname       = "ip_dynaddr",
307                 .data           = &sysctl_ip_dynaddr,
308                 .maxlen         = sizeof(int),
309                 .mode           = 0644,
310                 .proc_handler   = &proc_dointvec
311         },
312         {
313                 .ctl_name       = NET_IPV4_IPFRAG_TIME,
314                 .procname       = "ipfrag_time",
315                 .data           = &sysctl_ipfrag_time,
316                 .maxlen         = sizeof(int),
317                 .mode           = 0644,
318                 .proc_handler   = &proc_dointvec_jiffies,
319                 .strategy       = &sysctl_jiffies
320         },
321         {
322                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_TIME,
323                 .procname       = "tcp_keepalive_time",
324                 .data           = &sysctl_tcp_keepalive_time,
325                 .maxlen         = sizeof(int),
326                 .mode           = 0644,
327                 .proc_handler   = &proc_dointvec_jiffies,
328                 .strategy       = &sysctl_jiffies
329         },
330         {
331                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_PROBES,
332                 .procname       = "tcp_keepalive_probes",
333                 .data           = &sysctl_tcp_keepalive_probes,
334                 .maxlen         = sizeof(int),
335                 .mode           = 0644,
336                 .proc_handler   = &proc_dointvec
337         },
338         {
339                 .ctl_name       = NET_IPV4_TCP_KEEPALIVE_INTVL,
340                 .procname       = "tcp_keepalive_intvl",
341                 .data           = &sysctl_tcp_keepalive_intvl,
342                 .maxlen         = sizeof(int),
343                 .mode           = 0644,
344                 .proc_handler   = &proc_dointvec_jiffies,
345                 .strategy       = &sysctl_jiffies
346         },
347         {
348                 .ctl_name       = NET_IPV4_TCP_RETRIES1,
349                 .procname       = "tcp_retries1",
350                 .data           = &sysctl_tcp_retries1,
351                 .maxlen         = sizeof(int),
352                 .mode           = 0644,
353                 .proc_handler   = &proc_dointvec_minmax,
354                 .strategy       = &sysctl_intvec,
355                 .extra2         = &tcp_retr1_max
356         },
357         {
358                 .ctl_name       = NET_IPV4_TCP_RETRIES2,
359                 .procname       = "tcp_retries2",
360                 .data           = &sysctl_tcp_retries2,
361                 .maxlen         = sizeof(int),
362                 .mode           = 0644,
363                 .proc_handler   = &proc_dointvec
364         },
365         {
366                 .ctl_name       = NET_IPV4_TCP_FIN_TIMEOUT,
367                 .procname       = "tcp_fin_timeout",
368                 .data           = &sysctl_tcp_fin_timeout,
369                 .maxlen         = sizeof(int),
370                 .mode           = 0644,
371                 .proc_handler   = &proc_dointvec_jiffies,
372                 .strategy       = &sysctl_jiffies
373         },
374 #ifdef CONFIG_SYN_COOKIES
375         {
376                 .ctl_name       = NET_TCP_SYNCOOKIES,
377                 .procname       = "tcp_syncookies",
378                 .data           = &sysctl_tcp_syncookies,
379                 .maxlen         = sizeof(int),
380                 .mode           = 0644,
381                 .proc_handler   = &proc_dointvec
382         },
383 #endif
384         {
385                 .ctl_name       = NET_TCP_TW_RECYCLE,
386                 .procname       = "tcp_tw_recycle",
387                 .data           = &tcp_death_row.sysctl_tw_recycle,
388                 .maxlen         = sizeof(int),
389                 .mode           = 0644,
390                 .proc_handler   = &proc_dointvec
391         },
392         {
393                 .ctl_name       = NET_TCP_ABORT_ON_OVERFLOW,
394                 .procname       = "tcp_abort_on_overflow",
395                 .data           = &sysctl_tcp_abort_on_overflow,
396                 .maxlen         = sizeof(int),
397                 .mode           = 0644,
398                 .proc_handler   = &proc_dointvec
399         },
400         {
401                 .ctl_name       = NET_TCP_STDURG,
402                 .procname       = "tcp_stdurg",
403                 .data           = &sysctl_tcp_stdurg,
404                 .maxlen         = sizeof(int),
405                 .mode           = 0644,
406                 .proc_handler   = &proc_dointvec
407         },
408         {
409                 .ctl_name       = NET_TCP_RFC1337,
410                 .procname       = "tcp_rfc1337",
411                 .data           = &sysctl_tcp_rfc1337,
412                 .maxlen         = sizeof(int),
413                 .mode           = 0644,
414                 .proc_handler   = &proc_dointvec
415         },
416         {
417                 .ctl_name       = NET_TCP_MAX_SYN_BACKLOG,
418                 .procname       = "tcp_max_syn_backlog",
419                 .data           = &sysctl_max_syn_backlog,
420                 .maxlen         = sizeof(int),
421                 .mode           = 0644,
422                 .proc_handler   = &proc_dointvec
423         },
424         {
425                 .ctl_name       = NET_IPV4_LOCAL_PORT_RANGE,
426                 .procname       = "ip_local_port_range",
427                 .data           = &sysctl_local_port_range,
428                 .maxlen         = sizeof(sysctl_local_port_range),
429                 .mode           = 0644,
430                 .proc_handler   = &proc_dointvec_minmax,
431                 .strategy       = &sysctl_intvec,
432                 .extra1         = ip_local_port_range_min,
433                 .extra2         = ip_local_port_range_max
434         },
435         {
436                 .ctl_name       = NET_IPV4_ICMP_ECHO_IGNORE_ALL,
437                 .procname       = "icmp_echo_ignore_all",
438                 .data           = &sysctl_icmp_echo_ignore_all,
439                 .maxlen         = sizeof(int),
440                 .mode           = 0644,
441                 .proc_handler   = &proc_dointvec
442         },
443         {
444                 .ctl_name       = NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,
445                 .procname       = "icmp_echo_ignore_broadcasts",
446                 .data           = &sysctl_icmp_echo_ignore_broadcasts,
447                 .maxlen         = sizeof(int),
448                 .mode           = 0644,
449                 .proc_handler   = &proc_dointvec
450         },
451         {
452                 .ctl_name       = NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
453                 .procname       = "icmp_ignore_bogus_error_responses",
454                 .data           = &sysctl_icmp_ignore_bogus_error_responses,
455                 .maxlen         = sizeof(int),
456                 .mode           = 0644,
457                 .proc_handler   = &proc_dointvec
458         },
459         {
460                 .ctl_name       = NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
461                 .procname       = "icmp_errors_use_inbound_ifaddr",
462                 .data           = &sysctl_icmp_errors_use_inbound_ifaddr,
463                 .maxlen         = sizeof(int),
464                 .mode           = 0644,
465                 .proc_handler   = &proc_dointvec
466         },
467         {
468                 .ctl_name       = NET_IPV4_ROUTE,
469                 .procname       = "route",
470                 .maxlen         = 0,
471                 .mode           = 0555,
472                 .child          = ipv4_route_table
473         },
474 #ifdef CONFIG_IP_MULTICAST
475         {
476                 .ctl_name       = NET_IPV4_IGMP_MAX_MEMBERSHIPS,
477                 .procname       = "igmp_max_memberships",
478                 .data           = &sysctl_igmp_max_memberships,
479                 .maxlen         = sizeof(int),
480                 .mode           = 0644,
481                 .proc_handler   = &proc_dointvec
482         },
483
484 #endif
485         {
486                 .ctl_name       = NET_IPV4_IGMP_MAX_MSF,
487                 .procname       = "igmp_max_msf",
488                 .data           = &sysctl_igmp_max_msf,
489                 .maxlen         = sizeof(int),
490                 .mode           = 0644,
491                 .proc_handler   = &proc_dointvec
492         },
493         {
494                 .ctl_name       = NET_IPV4_INET_PEER_THRESHOLD,
495                 .procname       = "inet_peer_threshold",
496                 .data           = &inet_peer_threshold,
497                 .maxlen         = sizeof(int),
498                 .mode           = 0644,
499                 .proc_handler   = &proc_dointvec
500         },
501         {
502                 .ctl_name       = NET_IPV4_INET_PEER_MINTTL,
503                 .procname       = "inet_peer_minttl",
504                 .data           = &inet_peer_minttl,
505                 .maxlen         = sizeof(int),
506                 .mode           = 0644,
507                 .proc_handler   = &proc_dointvec_jiffies,
508                 .strategy       = &sysctl_jiffies
509         },
510         {
511                 .ctl_name       = NET_IPV4_INET_PEER_MAXTTL,
512                 .procname       = "inet_peer_maxttl",
513                 .data           = &inet_peer_maxttl,
514                 .maxlen         = sizeof(int),
515                 .mode           = 0644,
516                 .proc_handler   = &proc_dointvec_jiffies,
517                 .strategy       = &sysctl_jiffies
518         },
519         {
520                 .ctl_name       = NET_IPV4_INET_PEER_GC_MINTIME,
521                 .procname       = "inet_peer_gc_mintime",
522                 .data           = &inet_peer_gc_mintime,
523                 .maxlen         = sizeof(int),
524                 .mode           = 0644,
525                 .proc_handler   = &proc_dointvec_jiffies,
526                 .strategy       = &sysctl_jiffies
527         },
528         {
529                 .ctl_name       = NET_IPV4_INET_PEER_GC_MAXTIME,
530                 .procname       = "inet_peer_gc_maxtime",
531                 .data           = &inet_peer_gc_maxtime,
532                 .maxlen         = sizeof(int),
533                 .mode           = 0644,
534                 .proc_handler   = &proc_dointvec_jiffies,
535                 .strategy       = &sysctl_jiffies
536         },
537         {
538                 .ctl_name       = NET_TCP_ORPHAN_RETRIES,
539                 .procname       = "tcp_orphan_retries",
540                 .data           = &sysctl_tcp_orphan_retries,
541                 .maxlen         = sizeof(int),
542                 .mode           = 0644,
543                 .proc_handler   = &proc_dointvec
544         },
545         {
546                 .ctl_name       = NET_TCP_FACK,
547                 .procname       = "tcp_fack",
548                 .data           = &sysctl_tcp_fack,
549                 .maxlen         = sizeof(int),
550                 .mode           = 0644,
551                 .proc_handler   = &proc_dointvec
552         },
553         {
554                 .ctl_name       = NET_TCP_REORDERING,
555                 .procname       = "tcp_reordering",
556                 .data           = &sysctl_tcp_reordering,
557                 .maxlen         = sizeof(int),
558                 .mode           = 0644,
559                 .proc_handler   = &proc_dointvec
560         },
561         {
562                 .ctl_name       = NET_TCP_ECN,
563                 .procname       = "tcp_ecn",
564                 .data           = &sysctl_tcp_ecn,
565                 .maxlen         = sizeof(int),
566                 .mode           = 0644,
567                 .proc_handler   = &proc_dointvec
568         },
569         {
570                 .ctl_name       = NET_TCP_DSACK,
571                 .procname       = "tcp_dsack",
572                 .data           = &sysctl_tcp_dsack,
573                 .maxlen         = sizeof(int),
574                 .mode           = 0644,
575                 .proc_handler   = &proc_dointvec
576         },
577         {
578                 .ctl_name       = NET_TCP_MEM,
579                 .procname       = "tcp_mem",
580                 .data           = &sysctl_tcp_mem,
581                 .maxlen         = sizeof(sysctl_tcp_mem),
582                 .mode           = 0644,
583                 .proc_handler   = &proc_dointvec
584         },
585         {
586                 .ctl_name       = NET_TCP_WMEM,
587                 .procname       = "tcp_wmem",
588                 .data           = &sysctl_tcp_wmem,
589                 .maxlen         = sizeof(sysctl_tcp_wmem),
590                 .mode           = 0644,
591                 .proc_handler   = &proc_dointvec
592         },
593         {
594                 .ctl_name       = NET_TCP_RMEM,
595                 .procname       = "tcp_rmem",
596                 .data           = &sysctl_tcp_rmem,
597                 .maxlen         = sizeof(sysctl_tcp_rmem),
598                 .mode           = 0644,
599                 .proc_handler   = &proc_dointvec
600         },
601         {
602                 .ctl_name       = NET_TCP_APP_WIN,
603                 .procname       = "tcp_app_win",
604                 .data           = &sysctl_tcp_app_win,
605                 .maxlen         = sizeof(int),
606                 .mode           = 0644,
607                 .proc_handler   = &proc_dointvec
608         },
609         {
610                 .ctl_name       = NET_TCP_ADV_WIN_SCALE,
611                 .procname       = "tcp_adv_win_scale",
612                 .data           = &sysctl_tcp_adv_win_scale,
613                 .maxlen         = sizeof(int),
614                 .mode           = 0644,
615                 .proc_handler   = &proc_dointvec
616         },
617         {
618                 .ctl_name       = NET_IPV4_ICMP_RATELIMIT,
619                 .procname       = "icmp_ratelimit",
620                 .data           = &sysctl_icmp_ratelimit,
621                 .maxlen         = sizeof(int),
622                 .mode           = 0644,
623                 .proc_handler   = &proc_dointvec
624         },
625         {
626                 .ctl_name       = NET_IPV4_ICMP_RATEMASK,
627                 .procname       = "icmp_ratemask",
628                 .data           = &sysctl_icmp_ratemask,
629                 .maxlen         = sizeof(int),
630                 .mode           = 0644,
631                 .proc_handler   = &proc_dointvec
632         },
633         {
634                 .ctl_name       = NET_TCP_TW_REUSE,
635                 .procname       = "tcp_tw_reuse",
636                 .data           = &sysctl_tcp_tw_reuse,
637                 .maxlen         = sizeof(int),
638                 .mode           = 0644,
639                 .proc_handler   = &proc_dointvec
640         },
641         {
642                 .ctl_name       = NET_TCP_FRTO,
643                 .procname       = "tcp_frto",
644                 .data           = &sysctl_tcp_frto,
645                 .maxlen         = sizeof(int),
646                 .mode           = 0644,
647                 .proc_handler   = &proc_dointvec
648         },
649         {
650                 .ctl_name       = NET_TCP_FRTO_RESPONSE,
651                 .procname       = "tcp_frto_response",
652                 .data           = &sysctl_tcp_frto_response,
653                 .maxlen         = sizeof(int),
654                 .mode           = 0644,
655                 .proc_handler   = &proc_dointvec
656         },
657         {
658                 .ctl_name       = NET_TCP_LOW_LATENCY,
659                 .procname       = "tcp_low_latency",
660                 .data           = &sysctl_tcp_low_latency,
661                 .maxlen         = sizeof(int),
662                 .mode           = 0644,
663                 .proc_handler   = &proc_dointvec
664         },
665         {
666                 .ctl_name       = NET_IPV4_IPFRAG_SECRET_INTERVAL,
667                 .procname       = "ipfrag_secret_interval",
668                 .data           = &sysctl_ipfrag_secret_interval,
669                 .maxlen         = sizeof(int),
670                 .mode           = 0644,
671                 .proc_handler   = &proc_dointvec_jiffies,
672                 .strategy       = &sysctl_jiffies
673         },
674         {
675                 .ctl_name       = NET_IPV4_IPFRAG_MAX_DIST,
676                 .procname       = "ipfrag_max_dist",
677                 .data           = &sysctl_ipfrag_max_dist,
678                 .maxlen         = sizeof(int),
679                 .mode           = 0644,
680                 .proc_handler   = &proc_dointvec_minmax,
681                 .extra1         = &zero
682         },
683         {
684                 .ctl_name       = NET_TCP_NO_METRICS_SAVE,
685                 .procname       = "tcp_no_metrics_save",
686                 .data           = &sysctl_tcp_nometrics_save,
687                 .maxlen         = sizeof(int),
688                 .mode           = 0644,
689                 .proc_handler   = &proc_dointvec,
690         },
691         {
692                 .ctl_name       = NET_TCP_MODERATE_RCVBUF,
693                 .procname       = "tcp_moderate_rcvbuf",
694                 .data           = &sysctl_tcp_moderate_rcvbuf,
695                 .maxlen         = sizeof(int),
696                 .mode           = 0644,
697                 .proc_handler   = &proc_dointvec,
698         },
699         {
700                 .ctl_name       = NET_TCP_TSO_WIN_DIVISOR,
701                 .procname       = "tcp_tso_win_divisor",
702                 .data           = &sysctl_tcp_tso_win_divisor,
703                 .maxlen         = sizeof(int),
704                 .mode           = 0644,
705                 .proc_handler   = &proc_dointvec,
706         },
707         {
708                 .ctl_name       = NET_TCP_CONG_CONTROL,
709                 .procname       = "tcp_congestion_control",
710                 .mode           = 0644,
711                 .maxlen         = TCP_CA_NAME_MAX,
712                 .proc_handler   = &proc_tcp_congestion_control,
713                 .strategy       = &sysctl_tcp_congestion_control,
714         },
715         {
716                 .ctl_name       = NET_TCP_ABC,
717                 .procname       = "tcp_abc",
718                 .data           = &sysctl_tcp_abc,
719                 .maxlen         = sizeof(int),
720                 .mode           = 0644,
721                 .proc_handler   = &proc_dointvec,
722         },
723         {
724                 .ctl_name       = NET_TCP_MTU_PROBING,
725                 .procname       = "tcp_mtu_probing",
726                 .data           = &sysctl_tcp_mtu_probing,
727                 .maxlen         = sizeof(int),
728                 .mode           = 0644,
729                 .proc_handler   = &proc_dointvec,
730         },
731         {
732                 .ctl_name       = NET_TCP_BASE_MSS,
733                 .procname       = "tcp_base_mss",
734                 .data           = &sysctl_tcp_base_mss,
735                 .maxlen         = sizeof(int),
736                 .mode           = 0644,
737                 .proc_handler   = &proc_dointvec,
738         },
739         {
740                 .ctl_name       = NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS,
741                 .procname       = "tcp_workaround_signed_windows",
742                 .data           = &sysctl_tcp_workaround_signed_windows,
743                 .maxlen         = sizeof(int),
744                 .mode           = 0644,
745                 .proc_handler   = &proc_dointvec
746         },
747 #ifdef CONFIG_NET_DMA
748         {
749                 .ctl_name       = NET_TCP_DMA_COPYBREAK,
750                 .procname       = "tcp_dma_copybreak",
751                 .data           = &sysctl_tcp_dma_copybreak,
752                 .maxlen         = sizeof(int),
753                 .mode           = 0644,
754                 .proc_handler   = &proc_dointvec
755         },
756 #endif
757         {
758                 .ctl_name       = NET_TCP_SLOW_START_AFTER_IDLE,
759                 .procname       = "tcp_slow_start_after_idle",
760                 .data           = &sysctl_tcp_slow_start_after_idle,
761                 .maxlen         = sizeof(int),
762                 .mode           = 0644,
763                 .proc_handler   = &proc_dointvec
764         },
765 #ifdef CONFIG_NETLABEL
766         {
767                 .ctl_name       = NET_CIPSOV4_CACHE_ENABLE,
768                 .procname       = "cipso_cache_enable",
769                 .data           = &cipso_v4_cache_enabled,
770                 .maxlen         = sizeof(int),
771                 .mode           = 0644,
772                 .proc_handler   = &proc_dointvec,
773         },
774         {
775                 .ctl_name       = NET_CIPSOV4_CACHE_BUCKET_SIZE,
776                 .procname       = "cipso_cache_bucket_size",
777                 .data           = &cipso_v4_cache_bucketsize,
778                 .maxlen         = sizeof(int),
779                 .mode           = 0644,
780                 .proc_handler   = &proc_dointvec,
781         },
782         {
783                 .ctl_name       = NET_CIPSOV4_RBM_OPTFMT,
784                 .procname       = "cipso_rbm_optfmt",
785                 .data           = &cipso_v4_rbm_optfmt,
786                 .maxlen         = sizeof(int),
787                 .mode           = 0644,
788                 .proc_handler   = &proc_dointvec,
789         },
790         {
791                 .ctl_name       = NET_CIPSOV4_RBM_STRICTVALID,
792                 .procname       = "cipso_rbm_strictvalid",
793                 .data           = &cipso_v4_rbm_strictvalid,
794                 .maxlen         = sizeof(int),
795                 .mode           = 0644,
796                 .proc_handler   = &proc_dointvec,
797         },
798 #endif /* CONFIG_NETLABEL */
799         {
800                 .ctl_name       = NET_TCP_AVAIL_CONG_CONTROL,
801                 .procname       = "tcp_available_congestion_control",
802                 .maxlen         = TCP_CA_BUF_MAX,
803                 .mode           = 0444,
804                 .proc_handler   = &proc_tcp_available_congestion_control,
805         },
806         {
807                 .ctl_name       = NET_TCP_ALLOWED_CONG_CONTROL,
808                 .procname       = "tcp_allowed_congestion_control",
809                 .maxlen         = TCP_CA_BUF_MAX,
810                 .mode           = 0644,
811                 .proc_handler   = &proc_allowed_congestion_control,
812                 .strategy       = &strategy_allowed_congestion_control,
813         },
814         {
815                 .ctl_name       = NET_TCP_MAX_SSTHRESH,
816                 .procname       = "tcp_max_ssthresh",
817                 .data           = &sysctl_tcp_max_ssthresh,
818                 .maxlen         = sizeof(int),
819                 .mode           = 0644,
820                 .proc_handler   = &proc_dointvec,
821         },
822         { .ctl_name = 0 }
823 };
824
825 #endif /* CONFIG_SYSCTL */
826
827 EXPORT_SYMBOL(ipv4_config);