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Commit | Line | Data |
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1 | /* | |
2 | * sysctl_net_ipv4.c: sysctl interface to net IPV4 subsystem. | |
3 | * | |
4 | * Begun April 1, 1996, Mike Shaver. | |
5 | * Added /proc/sys/net/ipv4 directory entry (empty =) ). [MS] | |
6 | */ | |
7 | ||
8 | #include <linux/mm.h> | |
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> | |
15 | #include <linux/slab.h> | |
16 | #include <net/snmp.h> | |
17 | #include <net/icmp.h> | |
18 | #include <net/ip.h> | |
19 | #include <net/route.h> | |
20 | #include <net/tcp.h> | |
21 | #include <net/udp.h> | |
22 | #include <net/cipso_ipv4.h> | |
23 | #include <net/inet_frag.h> | |
24 | ||
25 | static int zero; | |
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 }; | |
29 | ||
30 | /* Update system visible IP port range */ | |
31 | static void set_local_port_range(int range[2]) | |
32 | { | |
33 | write_seqlock(&sysctl_local_ports.lock); | |
34 | sysctl_local_ports.range[0] = range[0]; | |
35 | sysctl_local_ports.range[1] = range[1]; | |
36 | write_sequnlock(&sysctl_local_ports.lock); | |
37 | } | |
38 | ||
39 | /* Validate changes from /proc interface. */ | |
40 | static int ipv4_local_port_range(ctl_table *table, int write, | |
41 | void __user *buffer, | |
42 | size_t *lenp, loff_t *ppos) | |
43 | { | |
44 | int ret; | |
45 | int range[2]; | |
46 | ctl_table tmp = { | |
47 | .data = &range, | |
48 | .maxlen = sizeof(range), | |
49 | .mode = table->mode, | |
50 | .extra1 = &ip_local_port_range_min, | |
51 | .extra2 = &ip_local_port_range_max, | |
52 | }; | |
53 | ||
54 | inet_get_local_port_range(range, range + 1); | |
55 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
56 | ||
57 | if (write && ret == 0) { | |
58 | if (range[1] < range[0]) | |
59 | ret = -EINVAL; | |
60 | else | |
61 | set_local_port_range(range); | |
62 | } | |
63 | ||
64 | return ret; | |
65 | } | |
66 | ||
67 | static int proc_tcp_congestion_control(ctl_table *ctl, int write, | |
68 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
69 | { | |
70 | char val[TCP_CA_NAME_MAX]; | |
71 | ctl_table tbl = { | |
72 | .data = val, | |
73 | .maxlen = TCP_CA_NAME_MAX, | |
74 | }; | |
75 | int ret; | |
76 | ||
77 | tcp_get_default_congestion_control(val); | |
78 | ||
79 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
80 | if (write && ret == 0) | |
81 | ret = tcp_set_default_congestion_control(val); | |
82 | return ret; | |
83 | } | |
84 | ||
85 | static int proc_tcp_available_congestion_control(ctl_table *ctl, | |
86 | int write, | |
87 | void __user *buffer, size_t *lenp, | |
88 | loff_t *ppos) | |
89 | { | |
90 | ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, }; | |
91 | int ret; | |
92 | ||
93 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
94 | if (!tbl.data) | |
95 | return -ENOMEM; | |
96 | tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX); | |
97 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
98 | kfree(tbl.data); | |
99 | return ret; | |
100 | } | |
101 | ||
102 | static int proc_allowed_congestion_control(ctl_table *ctl, | |
103 | int write, | |
104 | void __user *buffer, size_t *lenp, | |
105 | loff_t *ppos) | |
106 | { | |
107 | ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX }; | |
108 | int ret; | |
109 | ||
110 | tbl.data = kmalloc(tbl.maxlen, GFP_USER); | |
111 | if (!tbl.data) | |
112 | return -ENOMEM; | |
113 | ||
114 | tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen); | |
115 | ret = proc_dostring(&tbl, write, buffer, lenp, ppos); | |
116 | if (write && ret == 0) | |
117 | ret = tcp_set_allowed_congestion_control(tbl.data); | |
118 | kfree(tbl.data); | |
119 | return ret; | |
120 | } | |
121 | ||
122 | static struct ctl_table ipv4_table[] = { | |
123 | { | |
124 | .procname = "tcp_timestamps", | |
125 | .data = &sysctl_tcp_timestamps, | |
126 | .maxlen = sizeof(int), | |
127 | .mode = 0644, | |
128 | .proc_handler = proc_dointvec | |
129 | }, | |
130 | { | |
131 | .procname = "tcp_window_scaling", | |
132 | .data = &sysctl_tcp_window_scaling, | |
133 | .maxlen = sizeof(int), | |
134 | .mode = 0644, | |
135 | .proc_handler = proc_dointvec | |
136 | }, | |
137 | { | |
138 | .procname = "tcp_sack", | |
139 | .data = &sysctl_tcp_sack, | |
140 | .maxlen = sizeof(int), | |
141 | .mode = 0644, | |
142 | .proc_handler = proc_dointvec | |
143 | }, | |
144 | { | |
145 | .procname = "tcp_retrans_collapse", | |
146 | .data = &sysctl_tcp_retrans_collapse, | |
147 | .maxlen = sizeof(int), | |
148 | .mode = 0644, | |
149 | .proc_handler = proc_dointvec | |
150 | }, | |
151 | { | |
152 | .procname = "ip_default_ttl", | |
153 | .data = &sysctl_ip_default_ttl, | |
154 | .maxlen = sizeof(int), | |
155 | .mode = 0644, | |
156 | .proc_handler = ipv4_doint_and_flush, | |
157 | .extra2 = &init_net, | |
158 | }, | |
159 | { | |
160 | .procname = "ip_no_pmtu_disc", | |
161 | .data = &ipv4_config.no_pmtu_disc, | |
162 | .maxlen = sizeof(int), | |
163 | .mode = 0644, | |
164 | .proc_handler = proc_dointvec | |
165 | }, | |
166 | { | |
167 | .procname = "ip_nonlocal_bind", | |
168 | .data = &sysctl_ip_nonlocal_bind, | |
169 | .maxlen = sizeof(int), | |
170 | .mode = 0644, | |
171 | .proc_handler = proc_dointvec | |
172 | }, | |
173 | { | |
174 | .procname = "tcp_syn_retries", | |
175 | .data = &sysctl_tcp_syn_retries, | |
176 | .maxlen = sizeof(int), | |
177 | .mode = 0644, | |
178 | .proc_handler = proc_dointvec | |
179 | }, | |
180 | { | |
181 | .procname = "tcp_synack_retries", | |
182 | .data = &sysctl_tcp_synack_retries, | |
183 | .maxlen = sizeof(int), | |
184 | .mode = 0644, | |
185 | .proc_handler = proc_dointvec | |
186 | }, | |
187 | { | |
188 | .procname = "tcp_max_orphans", | |
189 | .data = &sysctl_tcp_max_orphans, | |
190 | .maxlen = sizeof(int), | |
191 | .mode = 0644, | |
192 | .proc_handler = proc_dointvec | |
193 | }, | |
194 | { | |
195 | .procname = "tcp_max_tw_buckets", | |
196 | .data = &tcp_death_row.sysctl_max_tw_buckets, | |
197 | .maxlen = sizeof(int), | |
198 | .mode = 0644, | |
199 | .proc_handler = proc_dointvec | |
200 | }, | |
201 | { | |
202 | .procname = "ip_dynaddr", | |
203 | .data = &sysctl_ip_dynaddr, | |
204 | .maxlen = sizeof(int), | |
205 | .mode = 0644, | |
206 | .proc_handler = proc_dointvec | |
207 | }, | |
208 | { | |
209 | .procname = "tcp_keepalive_time", | |
210 | .data = &sysctl_tcp_keepalive_time, | |
211 | .maxlen = sizeof(int), | |
212 | .mode = 0644, | |
213 | .proc_handler = proc_dointvec_jiffies, | |
214 | }, | |
215 | { | |
216 | .procname = "tcp_keepalive_probes", | |
217 | .data = &sysctl_tcp_keepalive_probes, | |
218 | .maxlen = sizeof(int), | |
219 | .mode = 0644, | |
220 | .proc_handler = proc_dointvec | |
221 | }, | |
222 | { | |
223 | .procname = "tcp_keepalive_intvl", | |
224 | .data = &sysctl_tcp_keepalive_intvl, | |
225 | .maxlen = sizeof(int), | |
226 | .mode = 0644, | |
227 | .proc_handler = proc_dointvec_jiffies, | |
228 | }, | |
229 | { | |
230 | .procname = "tcp_retries1", | |
231 | .data = &sysctl_tcp_retries1, | |
232 | .maxlen = sizeof(int), | |
233 | .mode = 0644, | |
234 | .proc_handler = proc_dointvec_minmax, | |
235 | .extra2 = &tcp_retr1_max | |
236 | }, | |
237 | { | |
238 | .procname = "tcp_retries2", | |
239 | .data = &sysctl_tcp_retries2, | |
240 | .maxlen = sizeof(int), | |
241 | .mode = 0644, | |
242 | .proc_handler = proc_dointvec | |
243 | }, | |
244 | { | |
245 | .procname = "tcp_fin_timeout", | |
246 | .data = &sysctl_tcp_fin_timeout, | |
247 | .maxlen = sizeof(int), | |
248 | .mode = 0644, | |
249 | .proc_handler = proc_dointvec_jiffies, | |
250 | }, | |
251 | #ifdef CONFIG_SYN_COOKIES | |
252 | { | |
253 | .procname = "tcp_syncookies", | |
254 | .data = &sysctl_tcp_syncookies, | |
255 | .maxlen = sizeof(int), | |
256 | .mode = 0644, | |
257 | .proc_handler = proc_dointvec | |
258 | }, | |
259 | #endif | |
260 | { | |
261 | .procname = "tcp_tw_recycle", | |
262 | .data = &tcp_death_row.sysctl_tw_recycle, | |
263 | .maxlen = sizeof(int), | |
264 | .mode = 0644, | |
265 | .proc_handler = proc_dointvec | |
266 | }, | |
267 | { | |
268 | .procname = "tcp_abort_on_overflow", | |
269 | .data = &sysctl_tcp_abort_on_overflow, | |
270 | .maxlen = sizeof(int), | |
271 | .mode = 0644, | |
272 | .proc_handler = proc_dointvec | |
273 | }, | |
274 | { | |
275 | .procname = "tcp_stdurg", | |
276 | .data = &sysctl_tcp_stdurg, | |
277 | .maxlen = sizeof(int), | |
278 | .mode = 0644, | |
279 | .proc_handler = proc_dointvec | |
280 | }, | |
281 | { | |
282 | .procname = "tcp_rfc1337", | |
283 | .data = &sysctl_tcp_rfc1337, | |
284 | .maxlen = sizeof(int), | |
285 | .mode = 0644, | |
286 | .proc_handler = proc_dointvec | |
287 | }, | |
288 | { | |
289 | .procname = "tcp_max_syn_backlog", | |
290 | .data = &sysctl_max_syn_backlog, | |
291 | .maxlen = sizeof(int), | |
292 | .mode = 0644, | |
293 | .proc_handler = proc_dointvec | |
294 | }, | |
295 | { | |
296 | .procname = "ip_local_port_range", | |
297 | .data = &sysctl_local_ports.range, | |
298 | .maxlen = sizeof(sysctl_local_ports.range), | |
299 | .mode = 0644, | |
300 | .proc_handler = ipv4_local_port_range, | |
301 | }, | |
302 | { | |
303 | .procname = "ip_local_reserved_ports", | |
304 | .data = NULL, /* initialized in sysctl_ipv4_init */ | |
305 | .maxlen = 65536, | |
306 | .mode = 0644, | |
307 | .proc_handler = proc_do_large_bitmap, | |
308 | }, | |
309 | #ifdef CONFIG_IP_MULTICAST | |
310 | { | |
311 | .procname = "igmp_max_memberships", | |
312 | .data = &sysctl_igmp_max_memberships, | |
313 | .maxlen = sizeof(int), | |
314 | .mode = 0644, | |
315 | .proc_handler = proc_dointvec | |
316 | }, | |
317 | ||
318 | #endif | |
319 | { | |
320 | .procname = "igmp_max_msf", | |
321 | .data = &sysctl_igmp_max_msf, | |
322 | .maxlen = sizeof(int), | |
323 | .mode = 0644, | |
324 | .proc_handler = proc_dointvec | |
325 | }, | |
326 | { | |
327 | .procname = "inet_peer_threshold", | |
328 | .data = &inet_peer_threshold, | |
329 | .maxlen = sizeof(int), | |
330 | .mode = 0644, | |
331 | .proc_handler = proc_dointvec | |
332 | }, | |
333 | { | |
334 | .procname = "inet_peer_minttl", | |
335 | .data = &inet_peer_minttl, | |
336 | .maxlen = sizeof(int), | |
337 | .mode = 0644, | |
338 | .proc_handler = proc_dointvec_jiffies, | |
339 | }, | |
340 | { | |
341 | .procname = "inet_peer_maxttl", | |
342 | .data = &inet_peer_maxttl, | |
343 | .maxlen = sizeof(int), | |
344 | .mode = 0644, | |
345 | .proc_handler = proc_dointvec_jiffies, | |
346 | }, | |
347 | { | |
348 | .procname = "inet_peer_gc_mintime", | |
349 | .data = &inet_peer_gc_mintime, | |
350 | .maxlen = sizeof(int), | |
351 | .mode = 0644, | |
352 | .proc_handler = proc_dointvec_jiffies, | |
353 | }, | |
354 | { | |
355 | .procname = "inet_peer_gc_maxtime", | |
356 | .data = &inet_peer_gc_maxtime, | |
357 | .maxlen = sizeof(int), | |
358 | .mode = 0644, | |
359 | .proc_handler = proc_dointvec_jiffies, | |
360 | }, | |
361 | { | |
362 | .procname = "tcp_orphan_retries", | |
363 | .data = &sysctl_tcp_orphan_retries, | |
364 | .maxlen = sizeof(int), | |
365 | .mode = 0644, | |
366 | .proc_handler = proc_dointvec | |
367 | }, | |
368 | { | |
369 | .procname = "tcp_fack", | |
370 | .data = &sysctl_tcp_fack, | |
371 | .maxlen = sizeof(int), | |
372 | .mode = 0644, | |
373 | .proc_handler = proc_dointvec | |
374 | }, | |
375 | { | |
376 | .procname = "tcp_reordering", | |
377 | .data = &sysctl_tcp_reordering, | |
378 | .maxlen = sizeof(int), | |
379 | .mode = 0644, | |
380 | .proc_handler = proc_dointvec | |
381 | }, | |
382 | { | |
383 | .procname = "tcp_ecn", | |
384 | .data = &sysctl_tcp_ecn, | |
385 | .maxlen = sizeof(int), | |
386 | .mode = 0644, | |
387 | .proc_handler = proc_dointvec | |
388 | }, | |
389 | { | |
390 | .procname = "tcp_dsack", | |
391 | .data = &sysctl_tcp_dsack, | |
392 | .maxlen = sizeof(int), | |
393 | .mode = 0644, | |
394 | .proc_handler = proc_dointvec | |
395 | }, | |
396 | { | |
397 | .procname = "tcp_mem", | |
398 | .data = &sysctl_tcp_mem, | |
399 | .maxlen = sizeof(sysctl_tcp_mem), | |
400 | .mode = 0644, | |
401 | .proc_handler = proc_doulongvec_minmax | |
402 | }, | |
403 | { | |
404 | .procname = "tcp_wmem", | |
405 | .data = &sysctl_tcp_wmem, | |
406 | .maxlen = sizeof(sysctl_tcp_wmem), | |
407 | .mode = 0644, | |
408 | .proc_handler = proc_dointvec | |
409 | }, | |
410 | { | |
411 | .procname = "tcp_rmem", | |
412 | .data = &sysctl_tcp_rmem, | |
413 | .maxlen = sizeof(sysctl_tcp_rmem), | |
414 | .mode = 0644, | |
415 | .proc_handler = proc_dointvec | |
416 | }, | |
417 | { | |
418 | .procname = "tcp_app_win", | |
419 | .data = &sysctl_tcp_app_win, | |
420 | .maxlen = sizeof(int), | |
421 | .mode = 0644, | |
422 | .proc_handler = proc_dointvec | |
423 | }, | |
424 | { | |
425 | .procname = "tcp_adv_win_scale", | |
426 | .data = &sysctl_tcp_adv_win_scale, | |
427 | .maxlen = sizeof(int), | |
428 | .mode = 0644, | |
429 | .proc_handler = proc_dointvec | |
430 | }, | |
431 | { | |
432 | .procname = "tcp_tw_reuse", | |
433 | .data = &sysctl_tcp_tw_reuse, | |
434 | .maxlen = sizeof(int), | |
435 | .mode = 0644, | |
436 | .proc_handler = proc_dointvec | |
437 | }, | |
438 | { | |
439 | .procname = "tcp_frto", | |
440 | .data = &sysctl_tcp_frto, | |
441 | .maxlen = sizeof(int), | |
442 | .mode = 0644, | |
443 | .proc_handler = proc_dointvec | |
444 | }, | |
445 | { | |
446 | .procname = "tcp_frto_response", | |
447 | .data = &sysctl_tcp_frto_response, | |
448 | .maxlen = sizeof(int), | |
449 | .mode = 0644, | |
450 | .proc_handler = proc_dointvec | |
451 | }, | |
452 | { | |
453 | .procname = "tcp_low_latency", | |
454 | .data = &sysctl_tcp_low_latency, | |
455 | .maxlen = sizeof(int), | |
456 | .mode = 0644, | |
457 | .proc_handler = proc_dointvec | |
458 | }, | |
459 | { | |
460 | .procname = "tcp_no_metrics_save", | |
461 | .data = &sysctl_tcp_nometrics_save, | |
462 | .maxlen = sizeof(int), | |
463 | .mode = 0644, | |
464 | .proc_handler = proc_dointvec, | |
465 | }, | |
466 | { | |
467 | .procname = "tcp_moderate_rcvbuf", | |
468 | .data = &sysctl_tcp_moderate_rcvbuf, | |
469 | .maxlen = sizeof(int), | |
470 | .mode = 0644, | |
471 | .proc_handler = proc_dointvec, | |
472 | }, | |
473 | { | |
474 | .procname = "tcp_tso_win_divisor", | |
475 | .data = &sysctl_tcp_tso_win_divisor, | |
476 | .maxlen = sizeof(int), | |
477 | .mode = 0644, | |
478 | .proc_handler = proc_dointvec, | |
479 | }, | |
480 | { | |
481 | .procname = "tcp_congestion_control", | |
482 | .mode = 0644, | |
483 | .maxlen = TCP_CA_NAME_MAX, | |
484 | .proc_handler = proc_tcp_congestion_control, | |
485 | }, | |
486 | { | |
487 | .procname = "tcp_abc", | |
488 | .data = &sysctl_tcp_abc, | |
489 | .maxlen = sizeof(int), | |
490 | .mode = 0644, | |
491 | .proc_handler = proc_dointvec, | |
492 | }, | |
493 | { | |
494 | .procname = "tcp_mtu_probing", | |
495 | .data = &sysctl_tcp_mtu_probing, | |
496 | .maxlen = sizeof(int), | |
497 | .mode = 0644, | |
498 | .proc_handler = proc_dointvec, | |
499 | }, | |
500 | { | |
501 | .procname = "tcp_base_mss", | |
502 | .data = &sysctl_tcp_base_mss, | |
503 | .maxlen = sizeof(int), | |
504 | .mode = 0644, | |
505 | .proc_handler = proc_dointvec, | |
506 | }, | |
507 | { | |
508 | .procname = "tcp_workaround_signed_windows", | |
509 | .data = &sysctl_tcp_workaround_signed_windows, | |
510 | .maxlen = sizeof(int), | |
511 | .mode = 0644, | |
512 | .proc_handler = proc_dointvec | |
513 | }, | |
514 | #ifdef CONFIG_NET_DMA | |
515 | { | |
516 | .procname = "tcp_dma_copybreak", | |
517 | .data = &sysctl_tcp_dma_copybreak, | |
518 | .maxlen = sizeof(int), | |
519 | .mode = 0644, | |
520 | .proc_handler = proc_dointvec | |
521 | }, | |
522 | #endif | |
523 | { | |
524 | .procname = "tcp_slow_start_after_idle", | |
525 | .data = &sysctl_tcp_slow_start_after_idle, | |
526 | .maxlen = sizeof(int), | |
527 | .mode = 0644, | |
528 | .proc_handler = proc_dointvec | |
529 | }, | |
530 | #ifdef CONFIG_NETLABEL | |
531 | { | |
532 | .procname = "cipso_cache_enable", | |
533 | .data = &cipso_v4_cache_enabled, | |
534 | .maxlen = sizeof(int), | |
535 | .mode = 0644, | |
536 | .proc_handler = proc_dointvec, | |
537 | }, | |
538 | { | |
539 | .procname = "cipso_cache_bucket_size", | |
540 | .data = &cipso_v4_cache_bucketsize, | |
541 | .maxlen = sizeof(int), | |
542 | .mode = 0644, | |
543 | .proc_handler = proc_dointvec, | |
544 | }, | |
545 | { | |
546 | .procname = "cipso_rbm_optfmt", | |
547 | .data = &cipso_v4_rbm_optfmt, | |
548 | .maxlen = sizeof(int), | |
549 | .mode = 0644, | |
550 | .proc_handler = proc_dointvec, | |
551 | }, | |
552 | { | |
553 | .procname = "cipso_rbm_strictvalid", | |
554 | .data = &cipso_v4_rbm_strictvalid, | |
555 | .maxlen = sizeof(int), | |
556 | .mode = 0644, | |
557 | .proc_handler = proc_dointvec, | |
558 | }, | |
559 | #endif /* CONFIG_NETLABEL */ | |
560 | { | |
561 | .procname = "tcp_available_congestion_control", | |
562 | .maxlen = TCP_CA_BUF_MAX, | |
563 | .mode = 0444, | |
564 | .proc_handler = proc_tcp_available_congestion_control, | |
565 | }, | |
566 | { | |
567 | .procname = "tcp_allowed_congestion_control", | |
568 | .maxlen = TCP_CA_BUF_MAX, | |
569 | .mode = 0644, | |
570 | .proc_handler = proc_allowed_congestion_control, | |
571 | }, | |
572 | { | |
573 | .procname = "tcp_max_ssthresh", | |
574 | .data = &sysctl_tcp_max_ssthresh, | |
575 | .maxlen = sizeof(int), | |
576 | .mode = 0644, | |
577 | .proc_handler = proc_dointvec, | |
578 | }, | |
579 | { | |
580 | .procname = "tcp_cookie_size", | |
581 | .data = &sysctl_tcp_cookie_size, | |
582 | .maxlen = sizeof(int), | |
583 | .mode = 0644, | |
584 | .proc_handler = proc_dointvec | |
585 | }, | |
586 | { | |
587 | .procname = "tcp_thin_linear_timeouts", | |
588 | .data = &sysctl_tcp_thin_linear_timeouts, | |
589 | .maxlen = sizeof(int), | |
590 | .mode = 0644, | |
591 | .proc_handler = proc_dointvec | |
592 | }, | |
593 | { | |
594 | .procname = "tcp_thin_dupack", | |
595 | .data = &sysctl_tcp_thin_dupack, | |
596 | .maxlen = sizeof(int), | |
597 | .mode = 0644, | |
598 | .proc_handler = proc_dointvec | |
599 | }, | |
600 | { | |
601 | .procname = "udp_mem", | |
602 | .data = &sysctl_udp_mem, | |
603 | .maxlen = sizeof(sysctl_udp_mem), | |
604 | .mode = 0644, | |
605 | .proc_handler = proc_doulongvec_minmax, | |
606 | }, | |
607 | { | |
608 | .procname = "udp_rmem_min", | |
609 | .data = &sysctl_udp_rmem_min, | |
610 | .maxlen = sizeof(sysctl_udp_rmem_min), | |
611 | .mode = 0644, | |
612 | .proc_handler = proc_dointvec_minmax, | |
613 | .extra1 = &zero | |
614 | }, | |
615 | { | |
616 | .procname = "udp_wmem_min", | |
617 | .data = &sysctl_udp_wmem_min, | |
618 | .maxlen = sizeof(sysctl_udp_wmem_min), | |
619 | .mode = 0644, | |
620 | .proc_handler = proc_dointvec_minmax, | |
621 | .extra1 = &zero | |
622 | }, | |
623 | { } | |
624 | }; | |
625 | ||
626 | static struct ctl_table ipv4_net_table[] = { | |
627 | { | |
628 | .procname = "icmp_echo_ignore_all", | |
629 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_all, | |
630 | .maxlen = sizeof(int), | |
631 | .mode = 0644, | |
632 | .proc_handler = proc_dointvec | |
633 | }, | |
634 | { | |
635 | .procname = "icmp_echo_ignore_broadcasts", | |
636 | .data = &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts, | |
637 | .maxlen = sizeof(int), | |
638 | .mode = 0644, | |
639 | .proc_handler = proc_dointvec | |
640 | }, | |
641 | { | |
642 | .procname = "icmp_ignore_bogus_error_responses", | |
643 | .data = &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses, | |
644 | .maxlen = sizeof(int), | |
645 | .mode = 0644, | |
646 | .proc_handler = proc_dointvec | |
647 | }, | |
648 | { | |
649 | .procname = "icmp_errors_use_inbound_ifaddr", | |
650 | .data = &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr, | |
651 | .maxlen = sizeof(int), | |
652 | .mode = 0644, | |
653 | .proc_handler = proc_dointvec | |
654 | }, | |
655 | { | |
656 | .procname = "icmp_ratelimit", | |
657 | .data = &init_net.ipv4.sysctl_icmp_ratelimit, | |
658 | .maxlen = sizeof(int), | |
659 | .mode = 0644, | |
660 | .proc_handler = proc_dointvec_ms_jiffies, | |
661 | }, | |
662 | { | |
663 | .procname = "icmp_ratemask", | |
664 | .data = &init_net.ipv4.sysctl_icmp_ratemask, | |
665 | .maxlen = sizeof(int), | |
666 | .mode = 0644, | |
667 | .proc_handler = proc_dointvec | |
668 | }, | |
669 | { | |
670 | .procname = "rt_cache_rebuild_count", | |
671 | .data = &init_net.ipv4.sysctl_rt_cache_rebuild_count, | |
672 | .maxlen = sizeof(int), | |
673 | .mode = 0644, | |
674 | .proc_handler = proc_dointvec | |
675 | }, | |
676 | { } | |
677 | }; | |
678 | ||
679 | struct ctl_path net_ipv4_ctl_path[] = { | |
680 | { .procname = "net", }, | |
681 | { .procname = "ipv4", }, | |
682 | { }, | |
683 | }; | |
684 | EXPORT_SYMBOL_GPL(net_ipv4_ctl_path); | |
685 | ||
686 | static __net_init int ipv4_sysctl_init_net(struct net *net) | |
687 | { | |
688 | struct ctl_table *table; | |
689 | ||
690 | table = ipv4_net_table; | |
691 | if (!net_eq(net, &init_net)) { | |
692 | table = kmemdup(table, sizeof(ipv4_net_table), GFP_KERNEL); | |
693 | if (table == NULL) | |
694 | goto err_alloc; | |
695 | ||
696 | table[0].data = | |
697 | &net->ipv4.sysctl_icmp_echo_ignore_all; | |
698 | table[1].data = | |
699 | &net->ipv4.sysctl_icmp_echo_ignore_broadcasts; | |
700 | table[2].data = | |
701 | &net->ipv4.sysctl_icmp_ignore_bogus_error_responses; | |
702 | table[3].data = | |
703 | &net->ipv4.sysctl_icmp_errors_use_inbound_ifaddr; | |
704 | table[4].data = | |
705 | &net->ipv4.sysctl_icmp_ratelimit; | |
706 | table[5].data = | |
707 | &net->ipv4.sysctl_icmp_ratemask; | |
708 | table[6].data = | |
709 | &net->ipv4.sysctl_rt_cache_rebuild_count; | |
710 | } | |
711 | ||
712 | net->ipv4.sysctl_rt_cache_rebuild_count = 4; | |
713 | ||
714 | net->ipv4.ipv4_hdr = register_net_sysctl_table(net, | |
715 | net_ipv4_ctl_path, table); | |
716 | if (net->ipv4.ipv4_hdr == NULL) | |
717 | goto err_reg; | |
718 | ||
719 | return 0; | |
720 | ||
721 | err_reg: | |
722 | if (!net_eq(net, &init_net)) | |
723 | kfree(table); | |
724 | err_alloc: | |
725 | return -ENOMEM; | |
726 | } | |
727 | ||
728 | static __net_exit void ipv4_sysctl_exit_net(struct net *net) | |
729 | { | |
730 | struct ctl_table *table; | |
731 | ||
732 | table = net->ipv4.ipv4_hdr->ctl_table_arg; | |
733 | unregister_net_sysctl_table(net->ipv4.ipv4_hdr); | |
734 | kfree(table); | |
735 | } | |
736 | ||
737 | static __net_initdata struct pernet_operations ipv4_sysctl_ops = { | |
738 | .init = ipv4_sysctl_init_net, | |
739 | .exit = ipv4_sysctl_exit_net, | |
740 | }; | |
741 | ||
742 | static __init int sysctl_ipv4_init(void) | |
743 | { | |
744 | struct ctl_table_header *hdr; | |
745 | struct ctl_table *i; | |
746 | ||
747 | for (i = ipv4_table; i->procname; i++) { | |
748 | if (strcmp(i->procname, "ip_local_reserved_ports") == 0) { | |
749 | i->data = sysctl_local_reserved_ports; | |
750 | break; | |
751 | } | |
752 | } | |
753 | if (!i->procname) | |
754 | return -EINVAL; | |
755 | ||
756 | hdr = register_sysctl_paths(net_ipv4_ctl_path, ipv4_table); | |
757 | if (hdr == NULL) | |
758 | return -ENOMEM; | |
759 | ||
760 | if (register_pernet_subsys(&ipv4_sysctl_ops)) { | |
761 | unregister_sysctl_table(hdr); | |
762 | return -ENOMEM; | |
763 | } | |
764 | ||
765 | return 0; | |
766 | } | |
767 | ||
768 | __initcall(sysctl_ipv4_init); |