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Blackfin: ip0x: fix unused variable warning
[linux-2.6/kvm.git] / kernel / sysctl.c
blob40245d697602be1965ab763bf7dc7798a03b960b
1 /*
2 * sysctl.c: General linux system control interface
3 *
4 * Begun 24 March 1995, Stephen Tweedie
5 * Added /proc support, Dec 1995
6 * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas.
7 * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver.
8 * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver.
9 * Dynamic registration fixes, Stephen Tweedie.
10 * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn.
11 * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris
12 * Horn.
13 * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer.
14 * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer.
15 * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill
16 * Wendling.
17 * The list_for_each() macro wasn't appropriate for the sysctl loop.
18 * Removed it and replaced it with older style, 03/23/00, Bill Wendling
19 */
20
21 #include <linux/module.h>
22 #include <linux/mm.h>
23 #include <linux/swap.h>
24 #include <linux/slab.h>
25 #include <linux/sysctl.h>
26 #include <linux/signal.h>
27 #include <linux/printk.h>
28 #include <linux/proc_fs.h>
29 #include <linux/security.h>
30 #include <linux/ctype.h>
31 #include <linux/kmemcheck.h>
32 #include <linux/fs.h>
33 #include <linux/init.h>
34 #include <linux/kernel.h>
35 #include <linux/kobject.h>
36 #include <linux/net.h>
37 #include <linux/sysrq.h>
38 #include <linux/highuid.h>
39 #include <linux/writeback.h>
40 #include <linux/ratelimit.h>
41 #include <linux/compaction.h>
42 #include <linux/hugetlb.h>
43 #include <linux/initrd.h>
44 #include <linux/key.h>
45 #include <linux/times.h>
46 #include <linux/limits.h>
47 #include <linux/dcache.h>
48 #include <linux/dnotify.h>
49 #include <linux/syscalls.h>
50 #include <linux/vmstat.h>
51 #include <linux/nfs_fs.h>
52 #include <linux/acpi.h>
53 #include <linux/reboot.h>
54 #include <linux/ftrace.h>
55 #include <linux/perf_event.h>
56 #include <linux/kprobes.h>
57 #include <linux/pipe_fs_i.h>
58 #include <linux/oom.h>
59
60 #include <asm/uaccess.h>
61 #include <asm/processor.h>
62
63 #ifdef CONFIG_X86
64 #include <asm/nmi.h>
65 #include <asm/stacktrace.h>
66 #include <asm/io.h>
67 #endif
68 #ifdef CONFIG_BSD_PROCESS_ACCT
69 #include <linux/acct.h>
70 #endif
71 #ifdef CONFIG_RT_MUTEXES
72 #include <linux/rtmutex.h>
73 #endif
74 #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT)
75 #include <linux/lockdep.h>
76 #endif
77 #ifdef CONFIG_CHR_DEV_SG
78 #include <scsi/sg.h>
79 #endif
80
81 #ifdef CONFIG_LOCKUP_DETECTOR
82 #include <linux/nmi.h>
83 #endif
84
85
86 #if defined(CONFIG_SYSCTL)
87
88 /* External variables not in a header file. */
89 extern int sysctl_overcommit_memory;
90 extern int sysctl_overcommit_ratio;
91 extern int max_threads;
92 extern int core_uses_pid;
93 extern int suid_dumpable;
94 extern char core_pattern[];
95 extern unsigned int core_pipe_limit;
96 extern int pid_max;
97 extern int min_free_kbytes;
98 extern int pid_max_min, pid_max_max;
99 extern int sysctl_drop_caches;
100 extern int percpu_pagelist_fraction;
101 extern int compat_log;
102 extern int latencytop_enabled;
103 extern int sysctl_nr_open_min, sysctl_nr_open_max;
104 #ifndef CONFIG_MMU
105 extern int sysctl_nr_trim_pages;
106 #endif
107 #ifdef CONFIG_BLOCK
108 extern int blk_iopoll_enabled;
109 #endif
110
111 /* Constants used for minimum and maximum */
112 #ifdef CONFIG_LOCKUP_DETECTOR
113 static int sixty = 60;
114 static int neg_one = -1;
115 #endif
116
117 static int zero;
118 static int __maybe_unused one = 1;
119 static int __maybe_unused two = 2;
120 static unsigned long one_ul = 1;
121 static int one_hundred = 100;
122 #ifdef CONFIG_PRINTK
123 static int ten_thousand = 10000;
124 #endif
125
126 /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
127 static unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
128
129 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
130 static int maxolduid = 65535;
131 static int minolduid;
132 static int min_percpu_pagelist_fract = 8;
133
134 static int ngroups_max = NGROUPS_MAX;
135
136 #ifdef CONFIG_INOTIFY_USER
137 #include <linux/inotify.h>
138 #endif
139 #ifdef CONFIG_SPARC
140 #include <asm/system.h>
141 #endif
142
143 #ifdef CONFIG_SPARC64
144 extern int sysctl_tsb_ratio;
145 #endif
146
147 #ifdef __hppa__
148 extern int pwrsw_enabled;
149 extern int unaligned_enabled;
150 #endif
151
152 #ifdef CONFIG_S390
153 #ifdef CONFIG_MATHEMU
154 extern int sysctl_ieee_emulation_warnings;
155 #endif
156 extern int sysctl_userprocess_debug;
157 extern int spin_retry;
158 #endif
159
160 #ifdef CONFIG_IA64
161 extern int no_unaligned_warning;
162 extern int unaligned_dump_stack;
163 #endif
164
165 #ifdef CONFIG_PROC_SYSCTL
166 static int proc_do_cad_pid(struct ctl_table *table, int write,
167 void __user *buffer, size_t *lenp, loff_t *ppos);
168 static int proc_taint(struct ctl_table *table, int write,
169 void __user *buffer, size_t *lenp, loff_t *ppos);
170 #endif
171
172 #ifdef CONFIG_MAGIC_SYSRQ
173 /* Note: sysrq code uses it's own private copy */
174 static int __sysrq_enabled = SYSRQ_DEFAULT_ENABLE;
175
176 static int sysrq_sysctl_handler(ctl_table *table, int write,
177 void __user *buffer, size_t *lenp,
178 loff_t *ppos)
179 {
180 int error;
181
182 error = proc_dointvec(table, write, buffer, lenp, ppos);
183 if (error)
184 return error;
185
186 if (write)
187 sysrq_toggle_support(__sysrq_enabled);
188
189 return 0;
190 }
191
192 #endif
193
194 static struct ctl_table root_table[];
195 static struct ctl_table_root sysctl_table_root;
196 static struct ctl_table_header root_table_header = {
197 {{.count = 1,
198 .ctl_table = root_table,
199 .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list),}},
200 .root = &sysctl_table_root,
201 .set = &sysctl_table_root.default_set,
202 };
203 static struct ctl_table_root sysctl_table_root = {
204 .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list),
205 .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry),
206 };
207
208 static struct ctl_table kern_table[];
209 static struct ctl_table vm_table[];
210 static struct ctl_table fs_table[];
211 static struct ctl_table debug_table[];
212 static struct ctl_table dev_table[];
213 extern struct ctl_table random_table[];
214 #ifdef CONFIG_EPOLL
215 extern struct ctl_table epoll_table[];
216 #endif
217
218 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
219 int sysctl_legacy_va_layout;
220 #endif
221
222 /* The default sysctl tables: */
223
224 static struct ctl_table root_table[] = {
225 {
226 .procname = "kernel",
227 .mode = 0555,
228 .child = kern_table,
229 },
230 {
231 .procname = "vm",
232 .mode = 0555,
233 .child = vm_table,
234 },
235 {
236 .procname = "fs",
237 .mode = 0555,
238 .child = fs_table,
239 },
240 {
241 .procname = "debug",
242 .mode = 0555,
243 .child = debug_table,
244 },
245 {
246 .procname = "dev",
247 .mode = 0555,
248 .child = dev_table,
249 },
250 { }
251 };
252
253 #ifdef CONFIG_SCHED_DEBUG
254 static int min_sched_granularity_ns = 100000; /* 100 usecs */
255 static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */
256 static int min_wakeup_granularity_ns; /* 0 usecs */
257 static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */
258 static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
259 static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1;
260 #endif
261
262 #ifdef CONFIG_COMPACTION
263 static int min_extfrag_threshold;
264 static int max_extfrag_threshold = 1000;
265 #endif
266
267 static struct ctl_table kern_table[] = {
268 {
269 .procname = "sched_child_runs_first",
270 .data = &sysctl_sched_child_runs_first,
271 .maxlen = sizeof(unsigned int),
272 .mode = 0644,
273 .proc_handler = proc_dointvec,
274 },
275 #ifdef CONFIG_SCHED_DEBUG
276 {
277 .procname = "sched_min_granularity_ns",
278 .data = &sysctl_sched_min_granularity,
279 .maxlen = sizeof(unsigned int),
280 .mode = 0644,
281 .proc_handler = sched_proc_update_handler,
282 .extra1 = &min_sched_granularity_ns,
283 .extra2 = &max_sched_granularity_ns,
284 },
285 {
286 .procname = "sched_latency_ns",
287 .data = &sysctl_sched_latency,
288 .maxlen = sizeof(unsigned int),
289 .mode = 0644,
290 .proc_handler = sched_proc_update_handler,
291 .extra1 = &min_sched_granularity_ns,
292 .extra2 = &max_sched_granularity_ns,
293 },
294 {
295 .procname = "sched_wakeup_granularity_ns",
296 .data = &sysctl_sched_wakeup_granularity,
297 .maxlen = sizeof(unsigned int),
298 .mode = 0644,
299 .proc_handler = sched_proc_update_handler,
300 .extra1 = &min_wakeup_granularity_ns,
301 .extra2 = &max_wakeup_granularity_ns,
302 },
303 {
304 .procname = "sched_tunable_scaling",
305 .data = &sysctl_sched_tunable_scaling,
306 .maxlen = sizeof(enum sched_tunable_scaling),
307 .mode = 0644,
308 .proc_handler = sched_proc_update_handler,
309 .extra1 = &min_sched_tunable_scaling,
310 .extra2 = &max_sched_tunable_scaling,
311 },
312 {
313 .procname = "sched_migration_cost",
314 .data = &sysctl_sched_migration_cost,
315 .maxlen = sizeof(unsigned int),
316 .mode = 0644,
317 .proc_handler = proc_dointvec,
318 },
319 {
320 .procname = "sched_nr_migrate",
321 .data = &sysctl_sched_nr_migrate,
322 .maxlen = sizeof(unsigned int),
323 .mode = 0644,
324 .proc_handler = proc_dointvec,
325 },
326 {
327 .procname = "sched_time_avg",
328 .data = &sysctl_sched_time_avg,
329 .maxlen = sizeof(unsigned int),
330 .mode = 0644,
331 .proc_handler = proc_dointvec,
332 },
333 {
334 .procname = "sched_shares_window",
335 .data = &sysctl_sched_shares_window,
336 .maxlen = sizeof(unsigned int),
337 .mode = 0644,
338 .proc_handler = proc_dointvec,
339 },
340 {
341 .procname = "timer_migration",
342 .data = &sysctl_timer_migration,
343 .maxlen = sizeof(unsigned int),
344 .mode = 0644,
345 .proc_handler = proc_dointvec_minmax,
346 .extra1 = &zero,
347 .extra2 = &one,
348 },
349 #endif
350 {
351 .procname = "sched_rt_period_us",
352 .data = &sysctl_sched_rt_period,
353 .maxlen = sizeof(unsigned int),
354 .mode = 0644,
355 .proc_handler = sched_rt_handler,
356 },
357 {
358 .procname = "sched_rt_runtime_us",
359 .data = &sysctl_sched_rt_runtime,
360 .maxlen = sizeof(int),
361 .mode = 0644,
362 .proc_handler = sched_rt_handler,
363 },
364 #ifdef CONFIG_SCHED_AUTOGROUP
365 {
366 .procname = "sched_autogroup_enabled",
367 .data = &sysctl_sched_autogroup_enabled,
368 .maxlen = sizeof(unsigned int),
369 .mode = 0644,
370 .proc_handler = proc_dointvec_minmax,
371 .extra1 = &zero,
372 .extra2 = &one,
373 },
374 #endif
375 #ifdef CONFIG_PROVE_LOCKING
376 {
377 .procname = "prove_locking",
378 .data = &prove_locking,
379 .maxlen = sizeof(int),
380 .mode = 0644,
381 .proc_handler = proc_dointvec,
382 },
383 #endif
384 #ifdef CONFIG_LOCK_STAT
385 {
386 .procname = "lock_stat",
387 .data = &lock_stat,
388 .maxlen = sizeof(int),
389 .mode = 0644,
390 .proc_handler = proc_dointvec,
391 },
392 #endif
393 {
394 .procname = "panic",
395 .data = &panic_timeout,
396 .maxlen = sizeof(int),
397 .mode = 0644,
398 .proc_handler = proc_dointvec,
399 },
400 {
401 .procname = "core_uses_pid",
402 .data = &core_uses_pid,
403 .maxlen = sizeof(int),
404 .mode = 0644,
405 .proc_handler = proc_dointvec,
406 },
407 {
408 .procname = "core_pattern",
409 .data = core_pattern,
410 .maxlen = CORENAME_MAX_SIZE,
411 .mode = 0644,
412 .proc_handler = proc_dostring,
413 },
414 {
415 .procname = "core_pipe_limit",
416 .data = &core_pipe_limit,
417 .maxlen = sizeof(unsigned int),
418 .mode = 0644,
419 .proc_handler = proc_dointvec,
420 },
421 #ifdef CONFIG_PROC_SYSCTL
422 {
423 .procname = "tainted",
424 .maxlen = sizeof(long),
425 .mode = 0644,
426 .proc_handler = proc_taint,
427 },
428 #endif
429 #ifdef CONFIG_LATENCYTOP
430 {
431 .procname = "latencytop",
432 .data = &latencytop_enabled,
433 .maxlen = sizeof(int),
434 .mode = 0644,
435 .proc_handler = proc_dointvec,
436 },
437 #endif
438 #ifdef CONFIG_BLK_DEV_INITRD
439 {
440 .procname = "real-root-dev",
441 .data = &real_root_dev,
442 .maxlen = sizeof(int),
443 .mode = 0644,
444 .proc_handler = proc_dointvec,
445 },
446 #endif
447 {
448 .procname = "print-fatal-signals",
449 .data = &print_fatal_signals,
450 .maxlen = sizeof(int),
451 .mode = 0644,
452 .proc_handler = proc_dointvec,
453 },
454 #ifdef CONFIG_SPARC
455 {
456 .procname = "reboot-cmd",
457 .data = reboot_command,
458 .maxlen = 256,
459 .mode = 0644,
460 .proc_handler = proc_dostring,
461 },
462 {
463 .procname = "stop-a",
464 .data = &stop_a_enabled,
465 .maxlen = sizeof (int),
466 .mode = 0644,
467 .proc_handler = proc_dointvec,
468 },
469 {
470 .procname = "scons-poweroff",
471 .data = &scons_pwroff,
472 .maxlen = sizeof (int),
473 .mode = 0644,
474 .proc_handler = proc_dointvec,
475 },
476 #endif
477 #ifdef CONFIG_SPARC64
478 {
479 .procname = "tsb-ratio",
480 .data = &sysctl_tsb_ratio,
481 .maxlen = sizeof (int),
482 .mode = 0644,
483 .proc_handler = proc_dointvec,
484 },
485 #endif
486 #ifdef __hppa__
487 {
488 .procname = "soft-power",
489 .data = &pwrsw_enabled,
490 .maxlen = sizeof (int),
491 .mode = 0644,
492 .proc_handler = proc_dointvec,
493 },
494 {
495 .procname = "unaligned-trap",
496 .data = &unaligned_enabled,
497 .maxlen = sizeof (int),
498 .mode = 0644,
499 .proc_handler = proc_dointvec,
500 },
501 #endif
502 {
503 .procname = "ctrl-alt-del",
504 .data = &C_A_D,
505 .maxlen = sizeof(int),
506 .mode = 0644,
507 .proc_handler = proc_dointvec,
508 },
509 #ifdef CONFIG_FUNCTION_TRACER
510 {
511 .procname = "ftrace_enabled",
512 .data = &ftrace_enabled,
513 .maxlen = sizeof(int),
514 .mode = 0644,
515 .proc_handler = ftrace_enable_sysctl,
516 },
517 #endif
518 #ifdef CONFIG_STACK_TRACER
519 {
520 .procname = "stack_tracer_enabled",
521 .data = &stack_tracer_enabled,
522 .maxlen = sizeof(int),
523 .mode = 0644,
524 .proc_handler = stack_trace_sysctl,
525 },
526 #endif
527 #ifdef CONFIG_TRACING
528 {
529 .procname = "ftrace_dump_on_oops",
530 .data = &ftrace_dump_on_oops,
531 .maxlen = sizeof(int),
532 .mode = 0644,
533 .proc_handler = proc_dointvec,
534 },
535 #endif
536 #ifdef CONFIG_MODULES
537 {
538 .procname = "modprobe",
539 .data = &modprobe_path,
540 .maxlen = KMOD_PATH_LEN,
541 .mode = 0644,
542 .proc_handler = proc_dostring,
543 },
544 {
545 .procname = "modules_disabled",
546 .data = &modules_disabled,
547 .maxlen = sizeof(int),
548 .mode = 0644,
549 /* only handle a transition from default "0" to "1" */
550 .proc_handler = proc_dointvec_minmax,
551 .extra1 = &one,
552 .extra2 = &one,
553 },
554 #endif
555 #ifdef CONFIG_HOTPLUG
556 {
557 .procname = "hotplug",
558 .data = &uevent_helper,
559 .maxlen = UEVENT_HELPER_PATH_LEN,
560 .mode = 0644,
561 .proc_handler = proc_dostring,
562 },
563 #endif
564 #ifdef CONFIG_CHR_DEV_SG
565 {
566 .procname = "sg-big-buff",
567 .data = &sg_big_buff,
568 .maxlen = sizeof (int),
569 .mode = 0444,
570 .proc_handler = proc_dointvec,
571 },
572 #endif
573 #ifdef CONFIG_BSD_PROCESS_ACCT
574 {
575 .procname = "acct",
576 .data = &acct_parm,
577 .maxlen = 3*sizeof(int),
578 .mode = 0644,
579 .proc_handler = proc_dointvec,
580 },
581 #endif
582 #ifdef CONFIG_MAGIC_SYSRQ
583 {
584 .procname = "sysrq",
585 .data = &__sysrq_enabled,
586 .maxlen = sizeof (int),
587 .mode = 0644,
588 .proc_handler = sysrq_sysctl_handler,
589 },
590 #endif
591 #ifdef CONFIG_PROC_SYSCTL
592 {
593 .procname = "cad_pid",
594 .data = NULL,
595 .maxlen = sizeof (int),
596 .mode = 0600,
597 .proc_handler = proc_do_cad_pid,
598 },
599 #endif
600 {
601 .procname = "threads-max",
602 .data = &max_threads,
603 .maxlen = sizeof(int),
604 .mode = 0644,
605 .proc_handler = proc_dointvec,
606 },
607 {
608 .procname = "random",
609 .mode = 0555,
610 .child = random_table,
611 },
612 {
613 .procname = "overflowuid",
614 .data = &overflowuid,
615 .maxlen = sizeof(int),
616 .mode = 0644,
617 .proc_handler = proc_dointvec_minmax,
618 .extra1 = &minolduid,
619 .extra2 = &maxolduid,
620 },
621 {
622 .procname = "overflowgid",
623 .data = &overflowgid,
624 .maxlen = sizeof(int),
625 .mode = 0644,
626 .proc_handler = proc_dointvec_minmax,
627 .extra1 = &minolduid,
628 .extra2 = &maxolduid,
629 },
630 #ifdef CONFIG_S390
631 #ifdef CONFIG_MATHEMU
632 {
633 .procname = "ieee_emulation_warnings",
634 .data = &sysctl_ieee_emulation_warnings,
635 .maxlen = sizeof(int),
636 .mode = 0644,
637 .proc_handler = proc_dointvec,
638 },
639 #endif
640 {
641 .procname = "userprocess_debug",
642 .data = &show_unhandled_signals,
643 .maxlen = sizeof(int),
644 .mode = 0644,
645 .proc_handler = proc_dointvec,
646 },
647 #endif
648 {
649 .procname = "pid_max",
650 .data = &pid_max,
651 .maxlen = sizeof (int),
652 .mode = 0644,
653 .proc_handler = proc_dointvec_minmax,
654 .extra1 = &pid_max_min,
655 .extra2 = &pid_max_max,
656 },
657 {
658 .procname = "panic_on_oops",
659 .data = &panic_on_oops,
660 .maxlen = sizeof(int),
661 .mode = 0644,
662 .proc_handler = proc_dointvec,
663 },
664 #if defined CONFIG_PRINTK
665 {
666 .procname = "printk",
667 .data = &console_loglevel,
668 .maxlen = 4*sizeof(int),
669 .mode = 0644,
670 .proc_handler = proc_dointvec,
671 },
672 {
673 .procname = "printk_ratelimit",
674 .data = &printk_ratelimit_state.interval,
675 .maxlen = sizeof(int),
676 .mode = 0644,
677 .proc_handler = proc_dointvec_jiffies,
678 },
679 {
680 .procname = "printk_ratelimit_burst",
681 .data = &printk_ratelimit_state.burst,
682 .maxlen = sizeof(int),
683 .mode = 0644,
684 .proc_handler = proc_dointvec,
685 },
686 {
687 .procname = "printk_delay",
688 .data = &printk_delay_msec,
689 .maxlen = sizeof(int),
690 .mode = 0644,
691 .proc_handler = proc_dointvec_minmax,
692 .extra1 = &zero,
693 .extra2 = &ten_thousand,
694 },
695 {
696 .procname = "dmesg_restrict",
697 .data = &dmesg_restrict,
698 .maxlen = sizeof(int),
699 .mode = 0644,
700 .proc_handler = proc_dointvec_minmax,
701 .extra1 = &zero,
702 .extra2 = &one,
703 },
704 {
705 .procname = "kptr_restrict",
706 .data = &kptr_restrict,
707 .maxlen = sizeof(int),
708 .mode = 0644,
709 .proc_handler = proc_dointvec_minmax,
710 .extra1 = &zero,
711 .extra2 = &two,
712 },
713 #endif
714 {
715 .procname = "ngroups_max",
716 .data = &ngroups_max,
717 .maxlen = sizeof (int),
718 .mode = 0444,
719 .proc_handler = proc_dointvec,
720 },
721 #if defined(CONFIG_LOCKUP_DETECTOR)
722 {
723 .procname = "watchdog",
724 .data = &watchdog_enabled,
725 .maxlen = sizeof (int),
726 .mode = 0644,
727 .proc_handler = proc_dowatchdog_enabled,
728 },
729 {
730 .procname = "watchdog_thresh",
731 .data = &softlockup_thresh,
732 .maxlen = sizeof(int),
733 .mode = 0644,
734 .proc_handler = proc_dowatchdog_thresh,
735 .extra1 = &neg_one,
736 .extra2 = &sixty,
737 },
738 {
739 .procname = "softlockup_panic",
740 .data = &softlockup_panic,
741 .maxlen = sizeof(int),
742 .mode = 0644,
743 .proc_handler = proc_dointvec_minmax,
744 .extra1 = &zero,
745 .extra2 = &one,
746 },
747 {
748 .procname = "nmi_watchdog",
749 .data = &watchdog_enabled,
750 .maxlen = sizeof (int),
751 .mode = 0644,
752 .proc_handler = proc_dowatchdog_enabled,
753 },
754 #endif
755 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
756 {
757 .procname = "unknown_nmi_panic",
758 .data = &unknown_nmi_panic,
759 .maxlen = sizeof (int),
760 .mode = 0644,
761 .proc_handler = proc_dointvec,
762 },
763 #endif
764 #if defined(CONFIG_X86)
765 {
766 .procname = "panic_on_unrecovered_nmi",
767 .data = &panic_on_unrecovered_nmi,
768 .maxlen = sizeof(int),
769 .mode = 0644,
770 .proc_handler = proc_dointvec,
771 },
772 {
773 .procname = "panic_on_io_nmi",
774 .data = &panic_on_io_nmi,
775 .maxlen = sizeof(int),
776 .mode = 0644,
777 .proc_handler = proc_dointvec,
778 },
779 {
780 .procname = "bootloader_type",
781 .data = &bootloader_type,
782 .maxlen = sizeof (int),
783 .mode = 0444,
784 .proc_handler = proc_dointvec,
785 },
786 {
787 .procname = "bootloader_version",
788 .data = &bootloader_version,
789 .maxlen = sizeof (int),
790 .mode = 0444,
791 .proc_handler = proc_dointvec,
792 },
793 {
794 .procname = "kstack_depth_to_print",
795 .data = &kstack_depth_to_print,
796 .maxlen = sizeof(int),
797 .mode = 0644,
798 .proc_handler = proc_dointvec,
799 },
800 {
801 .procname = "io_delay_type",
802 .data = &io_delay_type,
803 .maxlen = sizeof(int),
804 .mode = 0644,
805 .proc_handler = proc_dointvec,
806 },
807 #endif
808 #if defined(CONFIG_MMU)
809 {
810 .procname = "randomize_va_space",
811 .data = &randomize_va_space,
812 .maxlen = sizeof(int),
813 .mode = 0644,
814 .proc_handler = proc_dointvec,
815 },
816 #endif
817 #if defined(CONFIG_S390) && defined(CONFIG_SMP)
818 {
819 .procname = "spin_retry",
820 .data = &spin_retry,
821 .maxlen = sizeof (int),
822 .mode = 0644,
823 .proc_handler = proc_dointvec,
824 },
825 #endif
826 #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
827 {
828 .procname = "acpi_video_flags",
829 .data = &acpi_realmode_flags,
830 .maxlen = sizeof (unsigned long),
831 .mode = 0644,
832 .proc_handler = proc_doulongvec_minmax,
833 },
834 #endif
835 #ifdef CONFIG_IA64
836 {
837 .procname = "ignore-unaligned-usertrap",
838 .data = &no_unaligned_warning,
839 .maxlen = sizeof (int),
840 .mode = 0644,
841 .proc_handler = proc_dointvec,
842 },
843 {
844 .procname = "unaligned-dump-stack",
845 .data = &unaligned_dump_stack,
846 .maxlen = sizeof (int),
847 .mode = 0644,
848 .proc_handler = proc_dointvec,
849 },
850 #endif
851 #ifdef CONFIG_DETECT_HUNG_TASK
852 {
853 .procname = "hung_task_panic",
854 .data = &sysctl_hung_task_panic,
855 .maxlen = sizeof(int),
856 .mode = 0644,
857 .proc_handler = proc_dointvec_minmax,
858 .extra1 = &zero,
859 .extra2 = &one,
860 },
861 {
862 .procname = "hung_task_check_count",
863 .data = &sysctl_hung_task_check_count,
864 .maxlen = sizeof(unsigned long),
865 .mode = 0644,
866 .proc_handler = proc_doulongvec_minmax,
867 },
868 {
869 .procname = "hung_task_timeout_secs",
870 .data = &sysctl_hung_task_timeout_secs,
871 .maxlen = sizeof(unsigned long),
872 .mode = 0644,
873 .proc_handler = proc_dohung_task_timeout_secs,
874 },
875 {
876 .procname = "hung_task_warnings",
877 .data = &sysctl_hung_task_warnings,
878 .maxlen = sizeof(unsigned long),
879 .mode = 0644,
880 .proc_handler = proc_doulongvec_minmax,
881 },
882 #endif
883 #ifdef CONFIG_COMPAT
884 {
885 .procname = "compat-log",
886 .data = &compat_log,
887 .maxlen = sizeof (int),
888 .mode = 0644,
889 .proc_handler = proc_dointvec,
890 },
891 #endif
892 #ifdef CONFIG_RT_MUTEXES
893 {
894 .procname = "max_lock_depth",
895 .data = &max_lock_depth,
896 .maxlen = sizeof(int),
897 .mode = 0644,
898 .proc_handler = proc_dointvec,
899 },
900 #endif
901 {
902 .procname = "poweroff_cmd",
903 .data = &poweroff_cmd,
904 .maxlen = POWEROFF_CMD_PATH_LEN,
905 .mode = 0644,
906 .proc_handler = proc_dostring,
907 },
908 #ifdef CONFIG_KEYS
909 {
910 .procname = "keys",
911 .mode = 0555,
912 .child = key_sysctls,
913 },
914 #endif
915 #ifdef CONFIG_RCU_TORTURE_TEST
916 {
917 .procname = "rcutorture_runnable",
918 .data = &rcutorture_runnable,
919 .maxlen = sizeof(int),
920 .mode = 0644,
921 .proc_handler = proc_dointvec,
922 },
923 #endif
924 #ifdef CONFIG_PERF_EVENTS
925 {
926 .procname = "perf_event_paranoid",
927 .data = &sysctl_perf_event_paranoid,
928 .maxlen = sizeof(sysctl_perf_event_paranoid),
929 .mode = 0644,
930 .proc_handler = proc_dointvec,
931 },
932 {
933 .procname = "perf_event_mlock_kb",
934 .data = &sysctl_perf_event_mlock,
935 .maxlen = sizeof(sysctl_perf_event_mlock),
936 .mode = 0644,
937 .proc_handler = proc_dointvec,
938 },
939 {
940 .procname = "perf_event_max_sample_rate",
941 .data = &sysctl_perf_event_sample_rate,
942 .maxlen = sizeof(sysctl_perf_event_sample_rate),
943 .mode = 0644,
944 .proc_handler = perf_proc_update_handler,
945 },
946 #endif
947 #ifdef CONFIG_KMEMCHECK
948 {
949 .procname = "kmemcheck",
950 .data = &kmemcheck_enabled,
951 .maxlen = sizeof(int),
952 .mode = 0644,
953 .proc_handler = proc_dointvec,
954 },
955 #endif
956 #ifdef CONFIG_BLOCK
957 {
958 .procname = "blk_iopoll",
959 .data = &blk_iopoll_enabled,
960 .maxlen = sizeof(int),
961 .mode = 0644,
962 .proc_handler = proc_dointvec,
963 },
964 #endif
965 { }
966 };
967
968 static struct ctl_table vm_table[] = {
969 {
970 .procname = "overcommit_memory",
971 .data = &sysctl_overcommit_memory,
972 .maxlen = sizeof(sysctl_overcommit_memory),
973 .mode = 0644,
974 .proc_handler = proc_dointvec,
975 },
976 {
977 .procname = "panic_on_oom",
978 .data = &sysctl_panic_on_oom,
979 .maxlen = sizeof(sysctl_panic_on_oom),
980 .mode = 0644,
981 .proc_handler = proc_dointvec,
982 },
983 {
984 .procname = "oom_kill_allocating_task",
985 .data = &sysctl_oom_kill_allocating_task,
986 .maxlen = sizeof(sysctl_oom_kill_allocating_task),
987 .mode = 0644,
988 .proc_handler = proc_dointvec,
989 },
990 {
991 .procname = "oom_dump_tasks",
992 .data = &sysctl_oom_dump_tasks,
993 .maxlen = sizeof(sysctl_oom_dump_tasks),
994 .mode = 0644,
995 .proc_handler = proc_dointvec,
996 },
997 {
998 .procname = "overcommit_ratio",
999 .data = &sysctl_overcommit_ratio,
1000 .maxlen = sizeof(sysctl_overcommit_ratio),
1001 .mode = 0644,
1002 .proc_handler = proc_dointvec,
1003 },
1004 {
1005 .procname = "page-cluster",
1006 .data = &page_cluster,
1007 .maxlen = sizeof(int),
1008 .mode = 0644,
1009 .proc_handler = proc_dointvec,
1010 },
1011 {
1012 .procname = "dirty_background_ratio",
1013 .data = &dirty_background_ratio,
1014 .maxlen = sizeof(dirty_background_ratio),
1015 .mode = 0644,
1016 .proc_handler = dirty_background_ratio_handler,
1017 .extra1 = &zero,
1018 .extra2 = &one_hundred,
1019 },
1020 {
1021 .procname = "dirty_background_bytes",
1022 .data = &dirty_background_bytes,
1023 .maxlen = sizeof(dirty_background_bytes),
1024 .mode = 0644,
1025 .proc_handler = dirty_background_bytes_handler,
1026 .extra1 = &one_ul,
1027 },
1028 {
1029 .procname = "dirty_ratio",
1030 .data = &vm_dirty_ratio,
1031 .maxlen = sizeof(vm_dirty_ratio),
1032 .mode = 0644,
1033 .proc_handler = dirty_ratio_handler,
1034 .extra1 = &zero,
1035 .extra2 = &one_hundred,
1036 },
1037 {
1038 .procname = "dirty_bytes",
1039 .data = &vm_dirty_bytes,
1040 .maxlen = sizeof(vm_dirty_bytes),
1041 .mode = 0644,
1042 .proc_handler = dirty_bytes_handler,
1043 .extra1 = &dirty_bytes_min,
1044 },
1045 {
1046 .procname = "dirty_writeback_centisecs",
1047 .data = &dirty_writeback_interval,
1048 .maxlen = sizeof(dirty_writeback_interval),
1049 .mode = 0644,
1050 .proc_handler = dirty_writeback_centisecs_handler,
1051 },
1052 {
1053 .procname = "dirty_expire_centisecs",
1054 .data = &dirty_expire_interval,
1055 .maxlen = sizeof(dirty_expire_interval),
1056 .mode = 0644,
1057 .proc_handler = proc_dointvec,
1058 },
1059 {
1060 .procname = "nr_pdflush_threads",
1061 .data = &nr_pdflush_threads,
1062 .maxlen = sizeof nr_pdflush_threads,
1063 .mode = 0444 /* read-only*/,
1064 .proc_handler = proc_dointvec,
1065 },
1066 {
1067 .procname = "swappiness",
1068 .data = &vm_swappiness,
1069 .maxlen = sizeof(vm_swappiness),
1070 .mode = 0644,
1071 .proc_handler = proc_dointvec_minmax,
1072 .extra1 = &zero,
1073 .extra2 = &one_hundred,
1074 },
1075 #ifdef CONFIG_HUGETLB_PAGE
1076 {
1077 .procname = "nr_hugepages",
1078 .data = NULL,
1079 .maxlen = sizeof(unsigned long),
1080 .mode = 0644,
1081 .proc_handler = hugetlb_sysctl_handler,
1082 .extra1 = (void *)&hugetlb_zero,
1083 .extra2 = (void *)&hugetlb_infinity,
1084 },
1085 #ifdef CONFIG_NUMA
1086 {
1087 .procname = "nr_hugepages_mempolicy",
1088 .data = NULL,
1089 .maxlen = sizeof(unsigned long),
1090 .mode = 0644,
1091 .proc_handler = &hugetlb_mempolicy_sysctl_handler,
1092 .extra1 = (void *)&hugetlb_zero,
1093 .extra2 = (void *)&hugetlb_infinity,
1094 },
1095 #endif
1096 {
1097 .procname = "hugetlb_shm_group",
1098 .data = &sysctl_hugetlb_shm_group,
1099 .maxlen = sizeof(gid_t),
1100 .mode = 0644,
1101 .proc_handler = proc_dointvec,
1102 },
1103 {
1104 .procname = "hugepages_treat_as_movable",
1105 .data = &hugepages_treat_as_movable,
1106 .maxlen = sizeof(int),
1107 .mode = 0644,
1108 .proc_handler = hugetlb_treat_movable_handler,
1109 },
1110 {
1111 .procname = "nr_overcommit_hugepages",
1112 .data = NULL,
1113 .maxlen = sizeof(unsigned long),
1114 .mode = 0644,
1115 .proc_handler = hugetlb_overcommit_handler,
1116 .extra1 = (void *)&hugetlb_zero,
1117 .extra2 = (void *)&hugetlb_infinity,
1118 },
1119 #endif
1120 {
1121 .procname = "lowmem_reserve_ratio",
1122 .data = &sysctl_lowmem_reserve_ratio,
1123 .maxlen = sizeof(sysctl_lowmem_reserve_ratio),
1124 .mode = 0644,
1125 .proc_handler = lowmem_reserve_ratio_sysctl_handler,
1126 },
1127 {
1128 .procname = "drop_caches",
1129 .data = &sysctl_drop_caches,
1130 .maxlen = sizeof(int),
1131 .mode = 0644,
1132 .proc_handler = drop_caches_sysctl_handler,
1133 },
1134 #ifdef CONFIG_COMPACTION
1135 {
1136 .procname = "compact_memory",
1137 .data = &sysctl_compact_memory,
1138 .maxlen = sizeof(int),
1139 .mode = 0200,
1140 .proc_handler = sysctl_compaction_handler,
1141 },
1142 {
1143 .procname = "extfrag_threshold",
1144 .data = &sysctl_extfrag_threshold,
1145 .maxlen = sizeof(int),
1146 .mode = 0644,
1147 .proc_handler = sysctl_extfrag_handler,
1148 .extra1 = &min_extfrag_threshold,
1149 .extra2 = &max_extfrag_threshold,
1150 },
1151
1152 #endif /* CONFIG_COMPACTION */
1153 {
1154 .procname = "min_free_kbytes",
1155 .data = &min_free_kbytes,
1156 .maxlen = sizeof(min_free_kbytes),
1157 .mode = 0644,
1158 .proc_handler = min_free_kbytes_sysctl_handler,
1159 .extra1 = &zero,
1160 },
1161 {
1162 .procname = "percpu_pagelist_fraction",
1163 .data = &percpu_pagelist_fraction,
1164 .maxlen = sizeof(percpu_pagelist_fraction),
1165 .mode = 0644,
1166 .proc_handler = percpu_pagelist_fraction_sysctl_handler,
1167 .extra1 = &min_percpu_pagelist_fract,
1168 },
1169 #ifdef CONFIG_MMU
1170 {
1171 .procname = "max_map_count",
1172 .data = &sysctl_max_map_count,
1173 .maxlen = sizeof(sysctl_max_map_count),
1174 .mode = 0644,
1175 .proc_handler = proc_dointvec_minmax,
1176 .extra1 = &zero,
1177 },
1178 #else
1179 {
1180 .procname = "nr_trim_pages",
1181 .data = &sysctl_nr_trim_pages,
1182 .maxlen = sizeof(sysctl_nr_trim_pages),
1183 .mode = 0644,
1184 .proc_handler = proc_dointvec_minmax,
1185 .extra1 = &zero,
1186 },
1187 #endif
1188 {
1189 .procname = "laptop_mode",
1190 .data = &laptop_mode,
1191 .maxlen = sizeof(laptop_mode),
1192 .mode = 0644,
1193 .proc_handler = proc_dointvec_jiffies,
1194 },
1195 {
1196 .procname = "block_dump",
1197 .data = &block_dump,
1198 .maxlen = sizeof(block_dump),
1199 .mode = 0644,
1200 .proc_handler = proc_dointvec,
1201 .extra1 = &zero,
1202 },
1203 {
1204 .procname = "vfs_cache_pressure",
1205 .data = &sysctl_vfs_cache_pressure,
1206 .maxlen = sizeof(sysctl_vfs_cache_pressure),
1207 .mode = 0644,
1208 .proc_handler = proc_dointvec,
1209 .extra1 = &zero,
1210 },
1211 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
1212 {
1213 .procname = "legacy_va_layout",
1214 .data = &sysctl_legacy_va_layout,
1215 .maxlen = sizeof(sysctl_legacy_va_layout),
1216 .mode = 0644,
1217 .proc_handler = proc_dointvec,
1218 .extra1 = &zero,
1219 },
1220 #endif
1221 #ifdef CONFIG_NUMA
1222 {
1223 .procname = "zone_reclaim_mode",
1224 .data = &zone_reclaim_mode,
1225 .maxlen = sizeof(zone_reclaim_mode),
1226 .mode = 0644,
1227 .proc_handler = proc_dointvec,
1228 .extra1 = &zero,
1229 },
1230 {
1231 .procname = "min_unmapped_ratio",
1232 .data = &sysctl_min_unmapped_ratio,
1233 .maxlen = sizeof(sysctl_min_unmapped_ratio),
1234 .mode = 0644,
1235 .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler,
1236 .extra1 = &zero,
1237 .extra2 = &one_hundred,
1238 },
1239 {
1240 .procname = "min_slab_ratio",
1241 .data = &sysctl_min_slab_ratio,
1242 .maxlen = sizeof(sysctl_min_slab_ratio),
1243 .mode = 0644,
1244 .proc_handler = sysctl_min_slab_ratio_sysctl_handler,
1245 .extra1 = &zero,
1246 .extra2 = &one_hundred,
1247 },
1248 #endif
1249 #ifdef CONFIG_SMP
1250 {
1251 .procname = "stat_interval",
1252 .data = &sysctl_stat_interval,
1253 .maxlen = sizeof(sysctl_stat_interval),
1254 .mode = 0644,
1255 .proc_handler = proc_dointvec_jiffies,
1256 },
1257 #endif
1258 #ifdef CONFIG_MMU
1259 {
1260 .procname = "mmap_min_addr",
1261 .data = &dac_mmap_min_addr,
1262 .maxlen = sizeof(unsigned long),
1263 .mode = 0644,
1264 .proc_handler = mmap_min_addr_handler,
1265 },
1266 #endif
1267 #ifdef CONFIG_NUMA
1268 {
1269 .procname = "numa_zonelist_order",
1270 .data = &numa_zonelist_order,
1271 .maxlen = NUMA_ZONELIST_ORDER_LEN,
1272 .mode = 0644,
1273 .proc_handler = numa_zonelist_order_handler,
1274 },
1275 #endif
1276 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
1277 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
1278 {
1279 .procname = "vdso_enabled",
1280 .data = &vdso_enabled,
1281 .maxlen = sizeof(vdso_enabled),
1282 .mode = 0644,
1283 .proc_handler = proc_dointvec,
1284 .extra1 = &zero,
1285 },
1286 #endif
1287 #ifdef CONFIG_HIGHMEM
1288 {
1289 .procname = "highmem_is_dirtyable",
1290 .data = &vm_highmem_is_dirtyable,
1291 .maxlen = sizeof(vm_highmem_is_dirtyable),
1292 .mode = 0644,
1293 .proc_handler = proc_dointvec_minmax,
1294 .extra1 = &zero,
1295 .extra2 = &one,
1296 },
1297 #endif
1298 {
1299 .procname = "scan_unevictable_pages",
1300 .data = &scan_unevictable_pages,
1301 .maxlen = sizeof(scan_unevictable_pages),
1302 .mode = 0644,
1303 .proc_handler = scan_unevictable_handler,
1304 },
1305 #ifdef CONFIG_MEMORY_FAILURE
1306 {
1307 .procname = "memory_failure_early_kill",
1308 .data = &sysctl_memory_failure_early_kill,
1309 .maxlen = sizeof(sysctl_memory_failure_early_kill),
1310 .mode = 0644,
1311 .proc_handler = proc_dointvec_minmax,
1312 .extra1 = &zero,
1313 .extra2 = &one,
1314 },
1315 {
1316 .procname = "memory_failure_recovery",
1317 .data = &sysctl_memory_failure_recovery,
1318 .maxlen = sizeof(sysctl_memory_failure_recovery),
1319 .mode = 0644,
1320 .proc_handler = proc_dointvec_minmax,
1321 .extra1 = &zero,
1322 .extra2 = &one,
1323 },
1324 #endif
1325 { }
1326 };
1327
1328 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1329 static struct ctl_table binfmt_misc_table[] = {
1330 { }
1331 };
1332 #endif
1333
1334 static struct ctl_table fs_table[] = {
1335 {
1336 .procname = "inode-nr",
1337 .data = &inodes_stat,
1338 .maxlen = 2*sizeof(int),
1339 .mode = 0444,
1340 .proc_handler = proc_nr_inodes,
1341 },
1342 {
1343 .procname = "inode-state",
1344 .data = &inodes_stat,
1345 .maxlen = 7*sizeof(int),
1346 .mode = 0444,
1347 .proc_handler = proc_nr_inodes,
1348 },
1349 {
1350 .procname = "file-nr",
1351 .data = &files_stat,
1352 .maxlen = sizeof(files_stat),
1353 .mode = 0444,
1354 .proc_handler = proc_nr_files,
1355 },
1356 {
1357 .procname = "file-max",
1358 .data = &files_stat.max_files,
1359 .maxlen = sizeof(files_stat.max_files),
1360 .mode = 0644,
1361 .proc_handler = proc_doulongvec_minmax,
1362 },
1363 {
1364 .procname = "nr_open",
1365 .data = &sysctl_nr_open,
1366 .maxlen = sizeof(int),
1367 .mode = 0644,
1368 .proc_handler = proc_dointvec_minmax,
1369 .extra1 = &sysctl_nr_open_min,
1370 .extra2 = &sysctl_nr_open_max,
1371 },
1372 {
1373 .procname = "dentry-state",
1374 .data = &dentry_stat,
1375 .maxlen = 6*sizeof(int),
1376 .mode = 0444,
1377 .proc_handler = proc_nr_dentry,
1378 },
1379 {
1380 .procname = "overflowuid",
1381 .data = &fs_overflowuid,
1382 .maxlen = sizeof(int),
1383 .mode = 0644,
1384 .proc_handler = proc_dointvec_minmax,
1385 .extra1 = &minolduid,
1386 .extra2 = &maxolduid,
1387 },
1388 {
1389 .procname = "overflowgid",
1390 .data = &fs_overflowgid,
1391 .maxlen = sizeof(int),
1392 .mode = 0644,
1393 .proc_handler = proc_dointvec_minmax,
1394 .extra1 = &minolduid,
1395 .extra2 = &maxolduid,
1396 },
1397 #ifdef CONFIG_FILE_LOCKING
1398 {
1399 .procname = "leases-enable",
1400 .data = &leases_enable,
1401 .maxlen = sizeof(int),
1402 .mode = 0644,
1403 .proc_handler = proc_dointvec,
1404 },
1405 #endif
1406 #ifdef CONFIG_DNOTIFY
1407 {
1408 .procname = "dir-notify-enable",
1409 .data = &dir_notify_enable,
1410 .maxlen = sizeof(int),
1411 .mode = 0644,
1412 .proc_handler = proc_dointvec,
1413 },
1414 #endif
1415 #ifdef CONFIG_MMU
1416 #ifdef CONFIG_FILE_LOCKING
1417 {
1418 .procname = "lease-break-time",
1419 .data = &lease_break_time,
1420 .maxlen = sizeof(int),
1421 .mode = 0644,
1422 .proc_handler = proc_dointvec,
1423 },
1424 #endif
1425 #ifdef CONFIG_AIO
1426 {
1427 .procname = "aio-nr",
1428 .data = &aio_nr,
1429 .maxlen = sizeof(aio_nr),
1430 .mode = 0444,
1431 .proc_handler = proc_doulongvec_minmax,
1432 },
1433 {
1434 .procname = "aio-max-nr",
1435 .data = &aio_max_nr,
1436 .maxlen = sizeof(aio_max_nr),
1437 .mode = 0644,
1438 .proc_handler = proc_doulongvec_minmax,
1439 },
1440 #endif /* CONFIG_AIO */
1441 #ifdef CONFIG_INOTIFY_USER
1442 {
1443 .procname = "inotify",
1444 .mode = 0555,
1445 .child = inotify_table,
1446 },
1447 #endif
1448 #ifdef CONFIG_EPOLL
1449 {
1450 .procname = "epoll",
1451 .mode = 0555,
1452 .child = epoll_table,
1453 },
1454 #endif
1455 #endif
1456 {
1457 .procname = "suid_dumpable",
1458 .data = &suid_dumpable,
1459 .maxlen = sizeof(int),
1460 .mode = 0644,
1461 .proc_handler = proc_dointvec_minmax,
1462 .extra1 = &zero,
1463 .extra2 = &two,
1464 },
1465 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1466 {
1467 .procname = "binfmt_misc",
1468 .mode = 0555,
1469 .child = binfmt_misc_table,
1470 },
1471 #endif
1472 {
1473 .procname = "pipe-max-size",
1474 .data = &pipe_max_size,
1475 .maxlen = sizeof(int),
1476 .mode = 0644,
1477 .proc_handler = &pipe_proc_fn,
1478 .extra1 = &pipe_min_size,
1479 },
1480 { }
1481 };
1482
1483 static struct ctl_table debug_table[] = {
1484 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || \
1485 defined(CONFIG_S390)
1486 {
1487 .procname = "exception-trace",
1488 .data = &show_unhandled_signals,
1489 .maxlen = sizeof(int),
1490 .mode = 0644,
1491 .proc_handler = proc_dointvec
1492 },
1493 #endif
1494 #if defined(CONFIG_OPTPROBES)
1495 {
1496 .procname = "kprobes-optimization",
1497 .data = &sysctl_kprobes_optimization,
1498 .maxlen = sizeof(int),
1499 .mode = 0644,
1500 .proc_handler = proc_kprobes_optimization_handler,
1501 .extra1 = &zero,
1502 .extra2 = &one,
1503 },
1504 #endif
1505 { }
1506 };
1507
1508 static struct ctl_table dev_table[] = {
1509 { }
1510 };
1511
1512 static DEFINE_SPINLOCK(sysctl_lock);
1513
1514 /* called under sysctl_lock */
1515 static int use_table(struct ctl_table_header *p)
1516 {
1517 if (unlikely(p->unregistering))
1518 return 0;
1519 p->used++;
1520 return 1;
1521 }
1522
1523 /* called under sysctl_lock */
1524 static void unuse_table(struct ctl_table_header *p)
1525 {
1526 if (!--p->used)
1527 if (unlikely(p->unregistering))
1528 complete(p->unregistering);
1529 }
1530
1531 /* called under sysctl_lock, will reacquire if has to wait */
1532 static void start_unregistering(struct ctl_table_header *p)
1533 {
1534 /*
1535 * if p->used is 0, nobody will ever touch that entry again;
1536 * we'll eliminate all paths to it before dropping sysctl_lock
1537 */
1538 if (unlikely(p->used)) {
1539 struct completion wait;
1540 init_completion(&wait);
1541 p->unregistering = &wait;
1542 spin_unlock(&sysctl_lock);
1543 wait_for_completion(&wait);
1544 spin_lock(&sysctl_lock);
1545 } else {
1546 /* anything non-NULL; we'll never dereference it */
1547 p->unregistering = ERR_PTR(-EINVAL);
1548 }
1549 /*
1550 * do not remove from the list until nobody holds it; walking the
1551 * list in do_sysctl() relies on that.
1552 */
1553 list_del_init(&p->ctl_entry);
1554 }
1555
1556 void sysctl_head_get(struct ctl_table_header *head)
1557 {
1558 spin_lock(&sysctl_lock);
1559 head->count++;
1560 spin_unlock(&sysctl_lock);
1561 }
1562
1563 static void free_head(struct rcu_head *rcu)
1564 {
1565 kfree(container_of(rcu, struct ctl_table_header, rcu));
1566 }
1567
1568 void sysctl_head_put(struct ctl_table_header *head)
1569 {
1570 spin_lock(&sysctl_lock);
1571 if (!--head->count)
1572 call_rcu(&head->rcu, free_head);
1573 spin_unlock(&sysctl_lock);
1574 }
1575
1576 struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head)
1577 {
1578 if (!head)
1579 BUG();
1580 spin_lock(&sysctl_lock);
1581 if (!use_table(head))
1582 head = ERR_PTR(-ENOENT);
1583 spin_unlock(&sysctl_lock);
1584 return head;
1585 }
1586
1587 void sysctl_head_finish(struct ctl_table_header *head)
1588 {
1589 if (!head)
1590 return;
1591 spin_lock(&sysctl_lock);
1592 unuse_table(head);
1593 spin_unlock(&sysctl_lock);
1594 }
1595
1596 static struct ctl_table_set *
1597 lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces)
1598 {
1599 struct ctl_table_set *set = &root->default_set;
1600 if (root->lookup)
1601 set = root->lookup(root, namespaces);
1602 return set;
1603 }
1604
1605 static struct list_head *
1606 lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces)
1607 {
1608 struct ctl_table_set *set = lookup_header_set(root, namespaces);
1609 return &set->list;
1610 }
1611
1612 struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces,
1613 struct ctl_table_header *prev)
1614 {
1615 struct ctl_table_root *root;
1616 struct list_head *header_list;
1617 struct ctl_table_header *head;
1618 struct list_head *tmp;
1619
1620 spin_lock(&sysctl_lock);
1621 if (prev) {
1622 head = prev;
1623 tmp = &prev->ctl_entry;
1624 unuse_table(prev);
1625 goto next;
1626 }
1627 tmp = &root_table_header.ctl_entry;
1628 for (;;) {
1629 head = list_entry(tmp, struct ctl_table_header, ctl_entry);
1630
1631 if (!use_table(head))
1632 goto next;
1633 spin_unlock(&sysctl_lock);
1634 return head;
1635 next:
1636 root = head->root;
1637 tmp = tmp->next;
1638 header_list = lookup_header_list(root, namespaces);
1639 if (tmp != header_list)
1640 continue;
1641
1642 do {
1643 root = list_entry(root->root_list.next,
1644 struct ctl_table_root, root_list);
1645 if (root == &sysctl_table_root)
1646 goto out;
1647 header_list = lookup_header_list(root, namespaces);
1648 } while (list_empty(header_list));
1649 tmp = header_list->next;
1650 }
1651 out:
1652 spin_unlock(&sysctl_lock);
1653 return NULL;
1654 }
1655
1656 struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev)
1657 {
1658 return __sysctl_head_next(current->nsproxy, prev);
1659 }
1660
1661 void register_sysctl_root(struct ctl_table_root *root)
1662 {
1663 spin_lock(&sysctl_lock);
1664 list_add_tail(&root->root_list, &sysctl_table_root.root_list);
1665 spin_unlock(&sysctl_lock);
1666 }
1667
1668 /*
1669 * sysctl_perm does NOT grant the superuser all rights automatically, because
1670 * some sysctl variables are readonly even to root.
1671 */
1672
1673 static int test_perm(int mode, int op)
1674 {
1675 if (!current_euid())
1676 mode >>= 6;
1677 else if (in_egroup_p(0))
1678 mode >>= 3;
1679 if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0)
1680 return 0;
1681 return -EACCES;
1682 }
1683
1684 int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op)
1685 {
1686 int mode;
1687
1688 if (root->permissions)
1689 mode = root->permissions(root, current->nsproxy, table);
1690 else
1691 mode = table->mode;
1692
1693 return test_perm(mode, op);
1694 }
1695
1696 static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table)
1697 {
1698 for (; table->procname; table++) {
1699 table->parent = parent;
1700 if (table->child)
1701 sysctl_set_parent(table, table->child);
1702 }
1703 }
1704
1705 static __init int sysctl_init(void)
1706 {
1707 sysctl_set_parent(NULL, root_table);
1708 #ifdef CONFIG_SYSCTL_SYSCALL_CHECK
1709 sysctl_check_table(current->nsproxy, root_table);
1710 #endif
1711 return 0;
1712 }
1713
1714 core_initcall(sysctl_init);
1715
1716 static struct ctl_table *is_branch_in(struct ctl_table *branch,
1717 struct ctl_table *table)
1718 {
1719 struct ctl_table *p;
1720 const char *s = branch->procname;
1721
1722 /* branch should have named subdirectory as its first element */
1723 if (!s || !branch->child)
1724 return NULL;
1725
1726 /* ... and nothing else */
1727 if (branch[1].procname)
1728 return NULL;
1729
1730 /* table should contain subdirectory with the same name */
1731 for (p = table; p->procname; p++) {
1732 if (!p->child)
1733 continue;
1734 if (p->procname && strcmp(p->procname, s) == 0)
1735 return p;
1736 }
1737 return NULL;
1738 }
1739
1740 /* see if attaching q to p would be an improvement */
1741 static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q)
1742 {
1743 struct ctl_table *to = p->ctl_table, *by = q->ctl_table;
1744 struct ctl_table *next;
1745 int is_better = 0;
1746 int not_in_parent = !p->attached_by;
1747
1748 while ((next = is_branch_in(by, to)) != NULL) {
1749 if (by == q->attached_by)
1750 is_better = 1;
1751 if (to == p->attached_by)
1752 not_in_parent = 1;
1753 by = by->child;
1754 to = next->child;
1755 }
1756
1757 if (is_better && not_in_parent) {
1758 q->attached_by = by;
1759 q->attached_to = to;
1760 q->parent = p;
1761 }
1762 }
1763
1764 /**
1765 * __register_sysctl_paths - register a sysctl hierarchy
1766 * @root: List of sysctl headers to register on
1767 * @namespaces: Data to compute which lists of sysctl entries are visible
1768 * @path: The path to the directory the sysctl table is in.
1769 * @table: the top-level table structure
1770 *
1771 * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1772 * array. A completely 0 filled entry terminates the table.
1773 *
1774 * The members of the &struct ctl_table structure are used as follows:
1775 *
1776 * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not
1777 * enter a sysctl file
1778 *
1779 * data - a pointer to data for use by proc_handler
1780 *
1781 * maxlen - the maximum size in bytes of the data
1782 *
1783 * mode - the file permissions for the /proc/sys file, and for sysctl(2)
1784 *
1785 * child - a pointer to the child sysctl table if this entry is a directory, or
1786 * %NULL.
1787 *
1788 * proc_handler - the text handler routine (described below)
1789 *
1790 * de - for internal use by the sysctl routines
1791 *
1792 * extra1, extra2 - extra pointers usable by the proc handler routines
1793 *
1794 * Leaf nodes in the sysctl tree will be represented by a single file
1795 * under /proc; non-leaf nodes will be represented by directories.
1796 *
1797 * sysctl(2) can automatically manage read and write requests through
1798 * the sysctl table. The data and maxlen fields of the ctl_table
1799 * struct enable minimal validation of the values being written to be
1800 * performed, and the mode field allows minimal authentication.
1801 *
1802 * There must be a proc_handler routine for any terminal nodes
1803 * mirrored under /proc/sys (non-terminals are handled by a built-in
1804 * directory handler). Several default handlers are available to
1805 * cover common cases -
1806 *
1807 * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(),
1808 * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(),
1809 * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax()
1810 *
1811 * It is the handler's job to read the input buffer from user memory
1812 * and process it. The handler should return 0 on success.
1813 *
1814 * This routine returns %NULL on a failure to register, and a pointer
1815 * to the table header on success.
1816 */
1817 struct ctl_table_header *__register_sysctl_paths(
1818 struct ctl_table_root *root,
1819 struct nsproxy *namespaces,
1820 const struct ctl_path *path, struct ctl_table *table)
1821 {
1822 struct ctl_table_header *header;
1823 struct ctl_table *new, **prevp;
1824 unsigned int n, npath;
1825 struct ctl_table_set *set;
1826
1827 /* Count the path components */
1828 for (npath = 0; path[npath].procname; ++npath)
1829 ;
1830
1831 /*
1832 * For each path component, allocate a 2-element ctl_table array.
1833 * The first array element will be filled with the sysctl entry
1834 * for this, the second will be the sentinel (procname == 0).
1835 *
1836 * We allocate everything in one go so that we don't have to
1837 * worry about freeing additional memory in unregister_sysctl_table.
1838 */
1839 header = kzalloc(sizeof(struct ctl_table_header) +
1840 (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL);
1841 if (!header)
1842 return NULL;
1843
1844 new = (struct ctl_table *) (header + 1);
1845
1846 /* Now connect the dots */
1847 prevp = &header->ctl_table;
1848 for (n = 0; n < npath; ++n, ++path) {
1849 /* Copy the procname */
1850 new->procname = path->procname;
1851 new->mode = 0555;
1852
1853 *prevp = new;
1854 prevp = &new->child;
1855
1856 new += 2;
1857 }
1858 *prevp = table;
1859 header->ctl_table_arg = table;
1860
1861 INIT_LIST_HEAD(&header->ctl_entry);
1862 header->used = 0;
1863 header->unregistering = NULL;
1864 header->root = root;
1865 sysctl_set_parent(NULL, header->ctl_table);
1866 header->count = 1;
1867 #ifdef CONFIG_SYSCTL_SYSCALL_CHECK
1868 if (sysctl_check_table(namespaces, header->ctl_table)) {
1869 kfree(header);
1870 return NULL;
1871 }
1872 #endif
1873 spin_lock(&sysctl_lock);
1874 header->set = lookup_header_set(root, namespaces);
1875 header->attached_by = header->ctl_table;
1876 header->attached_to = root_table;
1877 header->parent = &root_table_header;
1878 for (set = header->set; set; set = set->parent) {
1879 struct ctl_table_header *p;
1880 list_for_each_entry(p, &set->list, ctl_entry) {
1881 if (p->unregistering)
1882 continue;
1883 try_attach(p, header);
1884 }
1885 }
1886 header->parent->count++;
1887 list_add_tail(&header->ctl_entry, &header->set->list);
1888 spin_unlock(&sysctl_lock);
1889
1890 return header;
1891 }
1892
1893 /**
1894 * register_sysctl_table_path - register a sysctl table hierarchy
1895 * @path: The path to the directory the sysctl table is in.
1896 * @table: the top-level table structure
1897 *
1898 * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1899 * array. A completely 0 filled entry terminates the table.
1900 *
1901 * See __register_sysctl_paths for more details.
1902 */
1903 struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
1904 struct ctl_table *table)
1905 {
1906 return __register_sysctl_paths(&sysctl_table_root, current->nsproxy,
1907 path, table);
1908 }
1909
1910 /**
1911 * register_sysctl_table - register a sysctl table hierarchy
1912 * @table: the top-level table structure
1913 *
1914 * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1915 * array. A completely 0 filled entry terminates the table.
1916 *
1917 * See register_sysctl_paths for more details.
1918 */
1919 struct ctl_table_header *register_sysctl_table(struct ctl_table *table)
1920 {
1921 static const struct ctl_path null_path[] = { {} };
1922
1923 return register_sysctl_paths(null_path, table);
1924 }
1925
1926 /**
1927 * unregister_sysctl_table - unregister a sysctl table hierarchy
1928 * @header: the header returned from register_sysctl_table
1929 *
1930 * Unregisters the sysctl table and all children. proc entries may not
1931 * actually be removed until they are no longer used by anyone.
1932 */
1933 void unregister_sysctl_table(struct ctl_table_header * header)
1934 {
1935 might_sleep();
1936
1937 if (header == NULL)
1938 return;
1939
1940 spin_lock(&sysctl_lock);
1941 start_unregistering(header);
1942 if (!--header->parent->count) {
1943 WARN_ON(1);
1944 call_rcu(&header->parent->rcu, free_head);
1945 }
1946 if (!--header->count)
1947 call_rcu(&header->rcu, free_head);
1948 spin_unlock(&sysctl_lock);
1949 }
1950
1951 int sysctl_is_seen(struct ctl_table_header *p)
1952 {
1953 struct ctl_table_set *set = p->set;
1954 int res;
1955 spin_lock(&sysctl_lock);
1956 if (p->unregistering)
1957 res = 0;
1958 else if (!set->is_seen)
1959 res = 1;
1960 else
1961 res = set->is_seen(set);
1962 spin_unlock(&sysctl_lock);
1963 return res;
1964 }
1965
1966 void setup_sysctl_set(struct ctl_table_set *p,
1967 struct ctl_table_set *parent,
1968 int (*is_seen)(struct ctl_table_set *))
1969 {
1970 INIT_LIST_HEAD(&p->list);
1971 p->parent = parent ? parent : &sysctl_table_root.default_set;
1972 p->is_seen = is_seen;
1973 }
1974
1975 #else /* !CONFIG_SYSCTL */
1976 struct ctl_table_header *register_sysctl_table(struct ctl_table * table)
1977 {
1978 return NULL;
1979 }
1980
1981 struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
1982 struct ctl_table *table)
1983 {
1984 return NULL;
1985 }
1986
1987 void unregister_sysctl_table(struct ctl_table_header * table)
1988 {
1989 }
1990
1991 void setup_sysctl_set(struct ctl_table_set *p,
1992 struct ctl_table_set *parent,
1993 int (*is_seen)(struct ctl_table_set *))
1994 {
1995 }
1996
1997 void sysctl_head_put(struct ctl_table_header *head)
1998 {
1999 }
2000
2001 #endif /* CONFIG_SYSCTL */
2002
2003 /*
2004 * /proc/sys support
2005 */
2006
2007 #ifdef CONFIG_PROC_SYSCTL
2008
2009 static int _proc_do_string(void* data, int maxlen, int write,
2010 void __user *buffer,
2011 size_t *lenp, loff_t *ppos)
2012 {
2013 size_t len;
2014 char __user *p;
2015 char c;
2016
2017 if (!data || !maxlen || !*lenp) {
2018 *lenp = 0;
2019 return 0;
2020 }
2021
2022 if (write) {
2023 len = 0;
2024 p = buffer;
2025 while (len < *lenp) {
2026 if (get_user(c, p++))
2027 return -EFAULT;
2028 if (c == 0 || c == '\n')
2029 break;
2030 len++;
2031 }
2032 if (len >= maxlen)
2033 len = maxlen-1;
2034 if(copy_from_user(data, buffer, len))
2035 return -EFAULT;
2036 ((char *) data)[len] = 0;
2037 *ppos += *lenp;
2038 } else {
2039 len = strlen(data);
2040 if (len > maxlen)
2041 len = maxlen;
2042
2043 if (*ppos > len) {
2044 *lenp = 0;
2045 return 0;
2046 }
2047
2048 data += *ppos;
2049 len -= *ppos;
2050
2051 if (len > *lenp)
2052 len = *lenp;
2053 if (len)
2054 if(copy_to_user(buffer, data, len))
2055 return -EFAULT;
2056 if (len < *lenp) {
2057 if(put_user('\n', ((char __user *) buffer) + len))
2058 return -EFAULT;
2059 len++;
2060 }
2061 *lenp = len;
2062 *ppos += len;
2063 }
2064 return 0;
2065 }
2066
2067 /**
2068 * proc_dostring - read a string sysctl
2069 * @table: the sysctl table
2070 * @write: %TRUE if this is a write to the sysctl file
2071 * @buffer: the user buffer
2072 * @lenp: the size of the user buffer
2073 * @ppos: file position
2074 *
2075 * Reads/writes a string from/to the user buffer. If the kernel
2076 * buffer provided is not large enough to hold the string, the
2077 * string is truncated. The copied string is %NULL-terminated.
2078 * If the string is being read by the user process, it is copied
2079 * and a newline '\n' is added. It is truncated if the buffer is
2080 * not large enough.
2081 *
2082 * Returns 0 on success.
2083 */
2084 int proc_dostring(struct ctl_table *table, int write,
2085 void __user *buffer, size_t *lenp, loff_t *ppos)
2086 {
2087 return _proc_do_string(table->data, table->maxlen, write,
2088 buffer, lenp, ppos);
2089 }
2090
2091 static size_t proc_skip_spaces(char **buf)
2092 {
2093 size_t ret;
2094 char *tmp = skip_spaces(*buf);
2095 ret = tmp - *buf;
2096 *buf = tmp;
2097 return ret;
2098 }
2099
2100 static void proc_skip_char(char **buf, size_t *size, const char v)
2101 {
2102 while (*size) {
2103 if (**buf != v)
2104 break;
2105 (*size)--;
2106 (*buf)++;
2107 }
2108 }
2109
2110 #define TMPBUFLEN 22
2111 /**
2112 * proc_get_long - reads an ASCII formatted integer from a user buffer
2113 *
2114 * @buf: a kernel buffer
2115 * @size: size of the kernel buffer
2116 * @val: this is where the number will be stored
2117 * @neg: set to %TRUE if number is negative
2118 * @perm_tr: a vector which contains the allowed trailers
2119 * @perm_tr_len: size of the perm_tr vector
2120 * @tr: pointer to store the trailer character
2121 *
2122 * In case of success %0 is returned and @buf and @size are updated with
2123 * the amount of bytes read. If @tr is non-NULL and a trailing
2124 * character exists (size is non-zero after returning from this
2125 * function), @tr is updated with the trailing character.
2126 */
2127 static int proc_get_long(char **buf, size_t *size,
2128 unsigned long *val, bool *neg,
2129 const char *perm_tr, unsigned perm_tr_len, char *tr)
2130 {
2131 int len;
2132 char *p, tmp[TMPBUFLEN];
2133
2134 if (!*size)
2135 return -EINVAL;
2136
2137 len = *size;
2138 if (len > TMPBUFLEN - 1)
2139 len = TMPBUFLEN - 1;
2140
2141 memcpy(tmp, *buf, len);
2142
2143 tmp[len] = 0;
2144 p = tmp;
2145 if (*p == '-' && *size > 1) {
2146 *neg = true;
2147 p++;
2148 } else
2149 *neg = false;
2150 if (!isdigit(*p))
2151 return -EINVAL;
2152
2153 *val = simple_strtoul(p, &p, 0);
2154
2155 len = p - tmp;
2156
2157 /* We don't know if the next char is whitespace thus we may accept
2158 * invalid integers (e.g. 1234...a) or two integers instead of one
2159 * (e.g. 123...1). So lets not allow such large numbers. */
2160 if (len == TMPBUFLEN - 1)
2161 return -EINVAL;
2162
2163 if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len))
2164 return -EINVAL;
2165
2166 if (tr && (len < *size))
2167 *tr = *p;
2168
2169 *buf += len;
2170 *size -= len;
2171
2172 return 0;
2173 }
2174
2175 /**
2176 * proc_put_long - converts an integer to a decimal ASCII formatted string
2177 *
2178 * @buf: the user buffer
2179 * @size: the size of the user buffer
2180 * @val: the integer to be converted
2181 * @neg: sign of the number, %TRUE for negative
2182 *
2183 * In case of success %0 is returned and @buf and @size are updated with
2184 * the amount of bytes written.
2185 */
2186 static int proc_put_long(void __user **buf, size_t *size, unsigned long val,
2187 bool neg)
2188 {
2189 int len;
2190 char tmp[TMPBUFLEN], *p = tmp;
2191
2192 sprintf(p, "%s%lu", neg ? "-" : "", val);
2193 len = strlen(tmp);
2194 if (len > *size)
2195 len = *size;
2196 if (copy_to_user(*buf, tmp, len))
2197 return -EFAULT;
2198 *size -= len;
2199 *buf += len;
2200 return 0;
2201 }
2202 #undef TMPBUFLEN
2203
2204 static int proc_put_char(void __user **buf, size_t *size, char c)
2205 {
2206 if (*size) {
2207 char __user **buffer = (char __user **)buf;
2208 if (put_user(c, *buffer))
2209 return -EFAULT;
2210 (*size)--, (*buffer)++;
2211 *buf = *buffer;
2212 }
2213 return 0;
2214 }
2215
2216 static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp,
2217 int *valp,
2218 int write, void *data)
2219 {
2220 if (write) {
2221 *valp = *negp ? -*lvalp : *lvalp;
2222 } else {
2223 int val = *valp;
2224 if (val < 0) {
2225 *negp = true;
2226 *lvalp = (unsigned long)-val;
2227 } else {
2228 *negp = false;
2229 *lvalp = (unsigned long)val;
2230 }
2231 }
2232 return 0;
2233 }
2234
2235 static const char proc_wspace_sep[] = { ' ', '\t', '\n' };
2236
2237 static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table,
2238 int write, void __user *buffer,
2239 size_t *lenp, loff_t *ppos,
2240 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
2241 int write, void *data),
2242 void *data)
2243 {
2244 int *i, vleft, first = 1, err = 0;
2245 unsigned long page = 0;
2246 size_t left;
2247 char *kbuf;
2248
2249 if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) {
2250 *lenp = 0;
2251 return 0;
2252 }
2253
2254 i = (int *) tbl_data;
2255 vleft = table->maxlen / sizeof(*i);
2256 left = *lenp;
2257
2258 if (!conv)
2259 conv = do_proc_dointvec_conv;
2260
2261 if (write) {
2262 if (left > PAGE_SIZE - 1)
2263 left = PAGE_SIZE - 1;
2264 page = __get_free_page(GFP_TEMPORARY);
2265 kbuf = (char *) page;
2266 if (!kbuf)
2267 return -ENOMEM;
2268 if (copy_from_user(kbuf, buffer, left)) {
2269 err = -EFAULT;
2270 goto free;
2271 }
2272 kbuf[left] = 0;
2273 }
2274
2275 for (; left && vleft--; i++, first=0) {
2276 unsigned long lval;
2277 bool neg;
2278
2279 if (write) {
2280 left -= proc_skip_spaces(&kbuf);
2281
2282 if (!left)
2283 break;
2284 err = proc_get_long(&kbuf, &left, &lval, &neg,
2285 proc_wspace_sep,
2286 sizeof(proc_wspace_sep), NULL);
2287 if (err)
2288 break;
2289 if (conv(&neg, &lval, i, 1, data)) {
2290 err = -EINVAL;
2291 break;
2292 }
2293 } else {
2294 if (conv(&neg, &lval, i, 0, data)) {
2295 err = -EINVAL;
2296 break;
2297 }
2298 if (!first)
2299 err = proc_put_char(&buffer, &left, '\t');
2300 if (err)
2301 break;
2302 err = proc_put_long(&buffer, &left, lval, neg);
2303 if (err)
2304 break;
2305 }
2306 }
2307
2308 if (!write && !first && left && !err)
2309 err = proc_put_char(&buffer, &left, '\n');
2310 if (write && !err && left)
2311 left -= proc_skip_spaces(&kbuf);
2312 free:
2313 if (write) {
2314 free_page(page);
2315 if (first)
2316 return err ? : -EINVAL;
2317 }
2318 *lenp -= left;
2319 *ppos += *lenp;
2320 return err;
2321 }
2322
2323 static int do_proc_dointvec(struct ctl_table *table, int write,
2324 void __user *buffer, size_t *lenp, loff_t *ppos,
2325 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
2326 int write, void *data),
2327 void *data)
2328 {
2329 return __do_proc_dointvec(table->data, table, write,
2330 buffer, lenp, ppos, conv, data);
2331 }
2332
2333 /**
2334 * proc_dointvec - read a vector of integers
2335 * @table: the sysctl table
2336 * @write: %TRUE if this is a write to the sysctl file
2337 * @buffer: the user buffer
2338 * @lenp: the size of the user buffer
2339 * @ppos: file position
2340 *
2341 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2342 * values from/to the user buffer, treated as an ASCII string.
2343 *
2344 * Returns 0 on success.
2345 */
2346 int proc_dointvec(struct ctl_table *table, int write,
2347 void __user *buffer, size_t *lenp, loff_t *ppos)
2348 {
2349 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2350 NULL,NULL);
2351 }
2352
2353 /*
2354 * Taint values can only be increased
2355 * This means we can safely use a temporary.
2356 */
2357 static int proc_taint(struct ctl_table *table, int write,
2358 void __user *buffer, size_t *lenp, loff_t *ppos)
2359 {
2360 struct ctl_table t;
2361 unsigned long tmptaint = get_taint();
2362 int err;
2363
2364 if (write && !capable(CAP_SYS_ADMIN))
2365 return -EPERM;
2366
2367 t = *table;
2368 t.data = &tmptaint;
2369 err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos);
2370 if (err < 0)
2371 return err;
2372
2373 if (write) {
2374 /*
2375 * Poor man's atomic or. Not worth adding a primitive
2376 * to everyone's atomic.h for this
2377 */
2378 int i;
2379 for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) {
2380 if ((tmptaint >> i) & 1)
2381 add_taint(i);
2382 }
2383 }
2384
2385 return err;
2386 }
2387
2388 struct do_proc_dointvec_minmax_conv_param {
2389 int *min;
2390 int *max;
2391 };
2392
2393 static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp,
2394 int *valp,
2395 int write, void *data)
2396 {
2397 struct do_proc_dointvec_minmax_conv_param *param = data;
2398 if (write) {
2399 int val = *negp ? -*lvalp : *lvalp;
2400 if ((param->min && *param->min > val) ||
2401 (param->max && *param->max < val))
2402 return -EINVAL;
2403 *valp = val;
2404 } else {
2405 int val = *valp;
2406 if (val < 0) {
2407 *negp = true;
2408 *lvalp = (unsigned long)-val;
2409 } else {
2410 *negp = false;
2411 *lvalp = (unsigned long)val;
2412 }
2413 }
2414 return 0;
2415 }
2416
2417 /**
2418 * proc_dointvec_minmax - read a vector of integers with min/max values
2419 * @table: the sysctl table
2420 * @write: %TRUE if this is a write to the sysctl file
2421 * @buffer: the user buffer
2422 * @lenp: the size of the user buffer
2423 * @ppos: file position
2424 *
2425 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2426 * values from/to the user buffer, treated as an ASCII string.
2427 *
2428 * This routine will ensure the values are within the range specified by
2429 * table->extra1 (min) and table->extra2 (max).
2430 *
2431 * Returns 0 on success.
2432 */
2433 int proc_dointvec_minmax(struct ctl_table *table, int write,
2434 void __user *buffer, size_t *lenp, loff_t *ppos)
2435 {
2436 struct do_proc_dointvec_minmax_conv_param param = {
2437 .min = (int *) table->extra1,
2438 .max = (int *) table->extra2,
2439 };
2440 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2441 do_proc_dointvec_minmax_conv, &param);
2442 }
2443
2444 static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write,
2445 void __user *buffer,
2446 size_t *lenp, loff_t *ppos,
2447 unsigned long convmul,
2448 unsigned long convdiv)
2449 {
2450 unsigned long *i, *min, *max;
2451 int vleft, first = 1, err = 0;
2452 unsigned long page = 0;
2453 size_t left;
2454 char *kbuf;
2455
2456 if (!data || !table->maxlen || !*lenp || (*ppos && !write)) {
2457 *lenp = 0;
2458 return 0;
2459 }
2460
2461 i = (unsigned long *) data;
2462 min = (unsigned long *) table->extra1;
2463 max = (unsigned long *) table->extra2;
2464 vleft = table->maxlen / sizeof(unsigned long);
2465 left = *lenp;
2466
2467 if (write) {
2468 if (left > PAGE_SIZE - 1)
2469 left = PAGE_SIZE - 1;
2470 page = __get_free_page(GFP_TEMPORARY);
2471 kbuf = (char *) page;
2472 if (!kbuf)
2473 return -ENOMEM;
2474 if (copy_from_user(kbuf, buffer, left)) {
2475 err = -EFAULT;
2476 goto free;
2477 }
2478 kbuf[left] = 0;
2479 }
2480
2481 for (; left && vleft--; i++, first = 0) {
2482 unsigned long val;
2483
2484 if (write) {
2485 bool neg;
2486
2487 left -= proc_skip_spaces(&kbuf);
2488
2489 err = proc_get_long(&kbuf, &left, &val, &neg,
2490 proc_wspace_sep,
2491 sizeof(proc_wspace_sep), NULL);
2492 if (err)
2493 break;
2494 if (neg)
2495 continue;
2496 if ((min && val < *min) || (max && val > *max))
2497 continue;
2498 *i = val;
2499 } else {
2500 val = convdiv * (*i) / convmul;
2501 if (!first)
2502 err = proc_put_char(&buffer, &left, '\t');
2503 err = proc_put_long(&buffer, &left, val, false);
2504 if (err)
2505 break;
2506 }
2507 }
2508
2509 if (!write && !first && left && !err)
2510 err = proc_put_char(&buffer, &left, '\n');
2511 if (write && !err)
2512 left -= proc_skip_spaces(&kbuf);
2513 free:
2514 if (write) {
2515 free_page(page);
2516 if (first)
2517 return err ? : -EINVAL;
2518 }
2519 *lenp -= left;
2520 *ppos += *lenp;
2521 return err;
2522 }
2523
2524 static int do_proc_doulongvec_minmax(struct ctl_table *table, int write,
2525 void __user *buffer,
2526 size_t *lenp, loff_t *ppos,
2527 unsigned long convmul,
2528 unsigned long convdiv)
2529 {
2530 return __do_proc_doulongvec_minmax(table->data, table, write,
2531 buffer, lenp, ppos, convmul, convdiv);
2532 }
2533
2534 /**
2535 * proc_doulongvec_minmax - read a vector of long integers with min/max values
2536 * @table: the sysctl table
2537 * @write: %TRUE if this is a write to the sysctl file
2538 * @buffer: the user buffer
2539 * @lenp: the size of the user buffer
2540 * @ppos: file position
2541 *
2542 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2543 * values from/to the user buffer, treated as an ASCII string.
2544 *
2545 * This routine will ensure the values are within the range specified by
2546 * table->extra1 (min) and table->extra2 (max).
2547 *
2548 * Returns 0 on success.
2549 */
2550 int proc_doulongvec_minmax(struct ctl_table *table, int write,
2551 void __user *buffer, size_t *lenp, loff_t *ppos)
2552 {
2553 return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l);
2554 }
2555
2556 /**
2557 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
2558 * @table: the sysctl table
2559 * @write: %TRUE if this is a write to the sysctl file
2560 * @buffer: the user buffer
2561 * @lenp: the size of the user buffer
2562 * @ppos: file position
2563 *
2564 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2565 * values from/to the user buffer, treated as an ASCII string. The values
2566 * are treated as milliseconds, and converted to jiffies when they are stored.
2567 *
2568 * This routine will ensure the values are within the range specified by
2569 * table->extra1 (min) and table->extra2 (max).
2570 *
2571 * Returns 0 on success.
2572 */
2573 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2574 void __user *buffer,
2575 size_t *lenp, loff_t *ppos)
2576 {
2577 return do_proc_doulongvec_minmax(table, write, buffer,
2578 lenp, ppos, HZ, 1000l);
2579 }
2580
2581
2582 static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp,
2583 int *valp,
2584 int write, void *data)
2585 {
2586 if (write) {
2587 if (*lvalp > LONG_MAX / HZ)
2588 return 1;
2589 *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ);
2590 } else {
2591 int val = *valp;
2592 unsigned long lval;
2593 if (val < 0) {
2594 *negp = true;
2595 lval = (unsigned long)-val;
2596 } else {
2597 *negp = false;
2598 lval = (unsigned long)val;
2599 }
2600 *lvalp = lval / HZ;
2601 }
2602 return 0;
2603 }
2604
2605 static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp,
2606 int *valp,
2607 int write, void *data)
2608 {
2609 if (write) {
2610 if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ)
2611 return 1;
2612 *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp);
2613 } else {
2614 int val = *valp;
2615 unsigned long lval;
2616 if (val < 0) {
2617 *negp = true;
2618 lval = (unsigned long)-val;
2619 } else {
2620 *negp = false;
2621 lval = (unsigned long)val;
2622 }
2623 *lvalp = jiffies_to_clock_t(lval);
2624 }
2625 return 0;
2626 }
2627
2628 static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp,
2629 int *valp,
2630 int write, void *data)
2631 {
2632 if (write) {
2633 *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp);
2634 } else {
2635 int val = *valp;
2636 unsigned long lval;
2637 if (val < 0) {
2638 *negp = true;
2639 lval = (unsigned long)-val;
2640 } else {
2641 *negp = false;
2642 lval = (unsigned long)val;
2643 }
2644 *lvalp = jiffies_to_msecs(lval);
2645 }
2646 return 0;
2647 }
2648
2649 /**
2650 * proc_dointvec_jiffies - read a vector of integers as seconds
2651 * @table: the sysctl table
2652 * @write: %TRUE if this is a write to the sysctl file
2653 * @buffer: the user buffer
2654 * @lenp: the size of the user buffer
2655 * @ppos: file position
2656 *
2657 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2658 * values from/to the user buffer, treated as an ASCII string.
2659 * The values read are assumed to be in seconds, and are converted into
2660 * jiffies.
2661 *
2662 * Returns 0 on success.
2663 */
2664 int proc_dointvec_jiffies(struct ctl_table *table, int write,
2665 void __user *buffer, size_t *lenp, loff_t *ppos)
2666 {
2667 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2668 do_proc_dointvec_jiffies_conv,NULL);
2669 }
2670
2671 /**
2672 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
2673 * @table: the sysctl table
2674 * @write: %TRUE if this is a write to the sysctl file
2675 * @buffer: the user buffer
2676 * @lenp: the size of the user buffer
2677 * @ppos: pointer to the file position
2678 *
2679 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2680 * values from/to the user buffer, treated as an ASCII string.
2681 * The values read are assumed to be in 1/USER_HZ seconds, and
2682 * are converted into jiffies.
2683 *
2684 * Returns 0 on success.
2685 */
2686 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
2687 void __user *buffer, size_t *lenp, loff_t *ppos)
2688 {
2689 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2690 do_proc_dointvec_userhz_jiffies_conv,NULL);
2691 }
2692
2693 /**
2694 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
2695 * @table: the sysctl table
2696 * @write: %TRUE if this is a write to the sysctl file
2697 * @buffer: the user buffer
2698 * @lenp: the size of the user buffer
2699 * @ppos: file position
2700 * @ppos: the current position in the file
2701 *
2702 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2703 * values from/to the user buffer, treated as an ASCII string.
2704 * The values read are assumed to be in 1/1000 seconds, and
2705 * are converted into jiffies.
2706 *
2707 * Returns 0 on success.
2708 */
2709 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
2710 void __user *buffer, size_t *lenp, loff_t *ppos)
2711 {
2712 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2713 do_proc_dointvec_ms_jiffies_conv, NULL);
2714 }
2715
2716 static int proc_do_cad_pid(struct ctl_table *table, int write,
2717 void __user *buffer, size_t *lenp, loff_t *ppos)
2718 {
2719 struct pid *new_pid;
2720 pid_t tmp;
2721 int r;
2722
2723 tmp = pid_vnr(cad_pid);
2724
2725 r = __do_proc_dointvec(&tmp, table, write, buffer,
2726 lenp, ppos, NULL, NULL);
2727 if (r || !write)
2728 return r;
2729
2730 new_pid = find_get_pid(tmp);
2731 if (!new_pid)
2732 return -ESRCH;
2733
2734 put_pid(xchg(&cad_pid, new_pid));
2735 return 0;
2736 }
2737
2738 /**
2739 * proc_do_large_bitmap - read/write from/to a large bitmap
2740 * @table: the sysctl table
2741 * @write: %TRUE if this is a write to the sysctl file
2742 * @buffer: the user buffer
2743 * @lenp: the size of the user buffer
2744 * @ppos: file position
2745 *
2746 * The bitmap is stored at table->data and the bitmap length (in bits)
2747 * in table->maxlen.
2748 *
2749 * We use a range comma separated format (e.g. 1,3-4,10-10) so that
2750 * large bitmaps may be represented in a compact manner. Writing into
2751 * the file will clear the bitmap then update it with the given input.
2752 *
2753 * Returns 0 on success.
2754 */
2755 int proc_do_large_bitmap(struct ctl_table *table, int write,
2756 void __user *buffer, size_t *lenp, loff_t *ppos)
2757 {
2758 int err = 0;
2759 bool first = 1;
2760 size_t left = *lenp;
2761 unsigned long bitmap_len = table->maxlen;
2762 unsigned long *bitmap = (unsigned long *) table->data;
2763 unsigned long *tmp_bitmap = NULL;
2764 char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c;
2765
2766 if (!bitmap_len || !left || (*ppos && !write)) {
2767 *lenp = 0;
2768 return 0;
2769 }
2770
2771 if (write) {
2772 unsigned long page = 0;
2773 char *kbuf;
2774
2775 if (left > PAGE_SIZE - 1)
2776 left = PAGE_SIZE - 1;
2777
2778 page = __get_free_page(GFP_TEMPORARY);
2779 kbuf = (char *) page;
2780 if (!kbuf)
2781 return -ENOMEM;
2782 if (copy_from_user(kbuf, buffer, left)) {
2783 free_page(page);
2784 return -EFAULT;
2785 }
2786 kbuf[left] = 0;
2787
2788 tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long),
2789 GFP_KERNEL);
2790 if (!tmp_bitmap) {
2791 free_page(page);
2792 return -ENOMEM;
2793 }
2794 proc_skip_char(&kbuf, &left, '\n');
2795 while (!err && left) {
2796 unsigned long val_a, val_b;
2797 bool neg;
2798
2799 err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a,
2800 sizeof(tr_a), &c);
2801 if (err)
2802 break;
2803 if (val_a >= bitmap_len || neg) {
2804 err = -EINVAL;
2805 break;
2806 }
2807
2808 val_b = val_a;
2809 if (left) {
2810 kbuf++;
2811 left--;
2812 }
2813
2814 if (c == '-') {
2815 err = proc_get_long(&kbuf, &left, &val_b,
2816 &neg, tr_b, sizeof(tr_b),
2817 &c);
2818 if (err)
2819 break;
2820 if (val_b >= bitmap_len || neg ||
2821 val_a > val_b) {
2822 err = -EINVAL;
2823 break;
2824 }
2825 if (left) {
2826 kbuf++;
2827 left--;
2828 }
2829 }
2830
2831 while (val_a <= val_b)
2832 set_bit(val_a++, tmp_bitmap);
2833
2834 first = 0;
2835 proc_skip_char(&kbuf, &left, '\n');
2836 }
2837 free_page(page);
2838 } else {
2839 unsigned long bit_a, bit_b = 0;
2840
2841 while (left) {
2842 bit_a = find_next_bit(bitmap, bitmap_len, bit_b);
2843 if (bit_a >= bitmap_len)
2844 break;
2845 bit_b = find_next_zero_bit(bitmap, bitmap_len,
2846 bit_a + 1) - 1;
2847
2848 if (!first) {
2849 err = proc_put_char(&buffer, &left, ',');
2850 if (err)
2851 break;
2852 }
2853 err = proc_put_long(&buffer, &left, bit_a, false);
2854 if (err)
2855 break;
2856 if (bit_a != bit_b) {
2857 err = proc_put_char(&buffer, &left, '-');
2858 if (err)
2859 break;
2860 err = proc_put_long(&buffer, &left, bit_b, false);
2861 if (err)
2862 break;
2863 }
2864
2865 first = 0; bit_b++;
2866 }
2867 if (!err)
2868 err = proc_put_char(&buffer, &left, '\n');
2869 }
2870
2871 if (!err) {
2872 if (write) {
2873 if (*ppos)
2874 bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len);
2875 else
2876 memcpy(bitmap, tmp_bitmap,
2877 BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long));
2878 }
2879 kfree(tmp_bitmap);
2880 *lenp -= left;
2881 *ppos += *lenp;
2882 return 0;
2883 } else {
2884 kfree(tmp_bitmap);
2885 return err;
2886 }
2887 }
2888
2889 #else /* CONFIG_PROC_SYSCTL */
2890
2891 int proc_dostring(struct ctl_table *table, int write,
2892 void __user *buffer, size_t *lenp, loff_t *ppos)
2893 {
2894 return -ENOSYS;
2895 }
2896
2897 int proc_dointvec(struct ctl_table *table, int write,
2898 void __user *buffer, size_t *lenp, loff_t *ppos)
2899 {
2900 return -ENOSYS;
2901 }
2902
2903 int proc_dointvec_minmax(struct ctl_table *table, int write,
2904 void __user *buffer, size_t *lenp, loff_t *ppos)
2905 {
2906 return -ENOSYS;
2907 }
2908
2909 int proc_dointvec_jiffies(struct ctl_table *table, int write,
2910 void __user *buffer, size_t *lenp, loff_t *ppos)
2911 {
2912 return -ENOSYS;
2913 }
2914
2915 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
2916 void __user *buffer, size_t *lenp, loff_t *ppos)
2917 {
2918 return -ENOSYS;
2919 }
2920
2921 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
2922 void __user *buffer, size_t *lenp, loff_t *ppos)
2923 {
2924 return -ENOSYS;
2925 }
2926
2927 int proc_doulongvec_minmax(struct ctl_table *table, int write,
2928 void __user *buffer, size_t *lenp, loff_t *ppos)
2929 {
2930 return -ENOSYS;
2931 }
2932
2933 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2934 void __user *buffer,
2935 size_t *lenp, loff_t *ppos)
2936 {
2937 return -ENOSYS;
2938 }
2939
2940
2941 #endif /* CONFIG_PROC_SYSCTL */
2942
2943 /*
2944 * No sense putting this after each symbol definition, twice,
2945 * exception granted :-)
2946 */
2947 EXPORT_SYMBOL(proc_dointvec);
2948 EXPORT_SYMBOL(proc_dointvec_jiffies);
2949 EXPORT_SYMBOL(proc_dointvec_minmax);
2950 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
2951 EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
2952 EXPORT_SYMBOL(proc_dostring);
2953 EXPORT_SYMBOL(proc_doulongvec_minmax);
2954 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
2955 EXPORT_SYMBOL(register_sysctl_table);
2956 EXPORT_SYMBOL(register_sysctl_paths);
2957 EXPORT_SYMBOL(unregister_sysctl_table);
kernel-based virtual machine