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net/irda: bfin_sir: pull in serial headers for defines
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / kernel / sysctl.c
blobae5cbb1e3ced15b8cc2e00b052496953709cf4c2
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/proc_fs.h>
28 #include <linux/security.h>
29 #include <linux/ctype.h>
30 #include <linux/kmemcheck.h>
31 #include <linux/fs.h>
32 #include <linux/init.h>
33 #include <linux/kernel.h>
34 #include <linux/kobject.h>
35 #include <linux/net.h>
36 #include <linux/sysrq.h>
37 #include <linux/highuid.h>
38 #include <linux/writeback.h>
39 #include <linux/ratelimit.h>
40 #include <linux/compaction.h>
41 #include <linux/hugetlb.h>
42 #include <linux/initrd.h>
43 #include <linux/key.h>
44 #include <linux/times.h>
45 #include <linux/limits.h>
46 #include <linux/dcache.h>
47 #include <linux/dnotify.h>
48 #include <linux/syscalls.h>
49 #include <linux/vmstat.h>
50 #include <linux/nfs_fs.h>
51 #include <linux/acpi.h>
52 #include <linux/reboot.h>
53 #include <linux/ftrace.h>
54 #include <linux/perf_event.h>
55 #include <linux/kprobes.h>
56 #include <linux/pipe_fs_i.h>
57 #include <linux/oom.h>
58
59 #include <asm/uaccess.h>
60 #include <asm/processor.h>
61
62 #ifdef CONFIG_X86
63 #include <asm/nmi.h>
64 #include <asm/stacktrace.h>
65 #include <asm/io.h>
66 #endif
67 #ifdef CONFIG_BSD_PROCESS_ACCT
68 #include <linux/acct.h>
69 #endif
70 #ifdef CONFIG_RT_MUTEXES
71 #include <linux/rtmutex.h>
72 #endif
73 #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT)
74 #include <linux/lockdep.h>
75 #endif
76 #ifdef CONFIG_CHR_DEV_SG
77 #include <scsi/sg.h>
78 #endif
79
80 #ifdef CONFIG_LOCKUP_DETECTOR
81 #include <linux/nmi.h>
82 #endif
83
84
85 #if defined(CONFIG_SYSCTL)
86
87 /* External variables not in a header file. */
88 extern int sysctl_overcommit_memory;
89 extern int sysctl_overcommit_ratio;
90 extern int max_threads;
91 extern int core_uses_pid;
92 extern int suid_dumpable;
93 extern char core_pattern[];
94 extern unsigned int core_pipe_limit;
95 extern int pid_max;
96 extern int min_free_kbytes;
97 extern int pid_max_min, pid_max_max;
98 extern int sysctl_drop_caches;
99 extern int percpu_pagelist_fraction;
100 extern int compat_log;
101 extern int latencytop_enabled;
102 extern int sysctl_nr_open_min, sysctl_nr_open_max;
103 #ifndef CONFIG_MMU
104 extern int sysctl_nr_trim_pages;
105 #endif
106 #ifdef CONFIG_BLOCK
107 extern int blk_iopoll_enabled;
108 #endif
109
110 /* Constants used for minimum and maximum */
111 #ifdef CONFIG_LOCKUP_DETECTOR
112 static int sixty = 60;
113 static int neg_one = -1;
114 #endif
115
116 static int zero;
117 static int __maybe_unused one = 1;
118 static int __maybe_unused two = 2;
119 static unsigned long one_ul = 1;
120 static int one_hundred = 100;
121 #ifdef CONFIG_PRINTK
122 static int ten_thousand = 10000;
123 #endif
124
125 /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
126 static unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
127
128 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
129 static int maxolduid = 65535;
130 static int minolduid;
131 static int min_percpu_pagelist_fract = 8;
132
133 static int ngroups_max = NGROUPS_MAX;
134
135 #ifdef CONFIG_INOTIFY_USER
136 #include <linux/inotify.h>
137 #endif
138 #ifdef CONFIG_SPARC
139 #include <asm/system.h>
140 #endif
141
142 #ifdef CONFIG_SPARC64
143 extern int sysctl_tsb_ratio;
144 #endif
145
146 #ifdef __hppa__
147 extern int pwrsw_enabled;
148 extern int unaligned_enabled;
149 #endif
150
151 #ifdef CONFIG_S390
152 #ifdef CONFIG_MATHEMU
153 extern int sysctl_ieee_emulation_warnings;
154 #endif
155 extern int sysctl_userprocess_debug;
156 extern int spin_retry;
157 #endif
158
159 #ifdef CONFIG_IA64
160 extern int no_unaligned_warning;
161 extern int unaligned_dump_stack;
162 #endif
163
164 #ifdef CONFIG_PROC_SYSCTL
165 static int proc_do_cad_pid(struct ctl_table *table, int write,
166 void __user *buffer, size_t *lenp, loff_t *ppos);
167 static int proc_taint(struct ctl_table *table, int write,
168 void __user *buffer, size_t *lenp, loff_t *ppos);
169 #endif
170
171 #ifdef CONFIG_MAGIC_SYSRQ
172 static int __sysrq_enabled; /* Note: sysrq code ises it's own private copy */
173
174 static int sysrq_sysctl_handler(ctl_table *table, int write,
175 void __user *buffer, size_t *lenp,
176 loff_t *ppos)
177 {
178 int error;
179
180 error = proc_dointvec(table, write, buffer, lenp, ppos);
181 if (error)
182 return error;
183
184 if (write)
185 sysrq_toggle_support(__sysrq_enabled);
186
187 return 0;
188 }
189
190 #endif
191
192 static struct ctl_table root_table[];
193 static struct ctl_table_root sysctl_table_root;
194 static struct ctl_table_header root_table_header = {
195 .count = 1,
196 .ctl_table = root_table,
197 .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list),
198 .root = &sysctl_table_root,
199 .set = &sysctl_table_root.default_set,
200 };
201 static struct ctl_table_root sysctl_table_root = {
202 .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list),
203 .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry),
204 };
205
206 static struct ctl_table kern_table[];
207 static struct ctl_table vm_table[];
208 static struct ctl_table fs_table[];
209 static struct ctl_table debug_table[];
210 static struct ctl_table dev_table[];
211 extern struct ctl_table random_table[];
212 #ifdef CONFIG_EPOLL
213 extern struct ctl_table epoll_table[];
214 #endif
215
216 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
217 int sysctl_legacy_va_layout;
218 #endif
219
220 /* The default sysctl tables: */
221
222 static struct ctl_table root_table[] = {
223 {
224 .procname = "kernel",
225 .mode = 0555,
226 .child = kern_table,
227 },
228 {
229 .procname = "vm",
230 .mode = 0555,
231 .child = vm_table,
232 },
233 {
234 .procname = "fs",
235 .mode = 0555,
236 .child = fs_table,
237 },
238 {
239 .procname = "debug",
240 .mode = 0555,
241 .child = debug_table,
242 },
243 {
244 .procname = "dev",
245 .mode = 0555,
246 .child = dev_table,
247 },
248 /*
249 * NOTE: do not add new entries to this table unless you have read
250 * Documentation/sysctl/ctl_unnumbered.txt
251 */
252 { }
253 };
254
255 #ifdef CONFIG_SCHED_DEBUG
256 static int min_sched_granularity_ns = 100000; /* 100 usecs */
257 static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */
258 static int min_wakeup_granularity_ns; /* 0 usecs */
259 static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */
260 static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
261 static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1;
262 #endif
263
264 #ifdef CONFIG_COMPACTION
265 static int min_extfrag_threshold;
266 static int max_extfrag_threshold = 1000;
267 #endif
268
269 static struct ctl_table kern_table[] = {
270 {
271 .procname = "sched_child_runs_first",
272 .data = &sysctl_sched_child_runs_first,
273 .maxlen = sizeof(unsigned int),
274 .mode = 0644,
275 .proc_handler = proc_dointvec,
276 },
277 #ifdef CONFIG_SCHED_DEBUG
278 {
279 .procname = "sched_min_granularity_ns",
280 .data = &sysctl_sched_min_granularity,
281 .maxlen = sizeof(unsigned int),
282 .mode = 0644,
283 .proc_handler = sched_proc_update_handler,
284 .extra1 = &min_sched_granularity_ns,
285 .extra2 = &max_sched_granularity_ns,
286 },
287 {
288 .procname = "sched_latency_ns",
289 .data = &sysctl_sched_latency,
290 .maxlen = sizeof(unsigned int),
291 .mode = 0644,
292 .proc_handler = sched_proc_update_handler,
293 .extra1 = &min_sched_granularity_ns,
294 .extra2 = &max_sched_granularity_ns,
295 },
296 {
297 .procname = "sched_wakeup_granularity_ns",
298 .data = &sysctl_sched_wakeup_granularity,
299 .maxlen = sizeof(unsigned int),
300 .mode = 0644,
301 .proc_handler = sched_proc_update_handler,
302 .extra1 = &min_wakeup_granularity_ns,
303 .extra2 = &max_wakeup_granularity_ns,
304 },
305 {
306 .procname = "sched_tunable_scaling",
307 .data = &sysctl_sched_tunable_scaling,
308 .maxlen = sizeof(enum sched_tunable_scaling),
309 .mode = 0644,
310 .proc_handler = sched_proc_update_handler,
311 .extra1 = &min_sched_tunable_scaling,
312 .extra2 = &max_sched_tunable_scaling,
313 },
314 {
315 .procname = "sched_migration_cost",
316 .data = &sysctl_sched_migration_cost,
317 .maxlen = sizeof(unsigned int),
318 .mode = 0644,
319 .proc_handler = proc_dointvec,
320 },
321 {
322 .procname = "sched_nr_migrate",
323 .data = &sysctl_sched_nr_migrate,
324 .maxlen = sizeof(unsigned int),
325 .mode = 0644,
326 .proc_handler = proc_dointvec,
327 },
328 {
329 .procname = "sched_time_avg",
330 .data = &sysctl_sched_time_avg,
331 .maxlen = sizeof(unsigned int),
332 .mode = 0644,
333 .proc_handler = proc_dointvec,
334 },
335 {
336 .procname = "sched_shares_window",
337 .data = &sysctl_sched_shares_window,
338 .maxlen = sizeof(unsigned int),
339 .mode = 0644,
340 .proc_handler = proc_dointvec,
341 },
342 {
343 .procname = "timer_migration",
344 .data = &sysctl_timer_migration,
345 .maxlen = sizeof(unsigned int),
346 .mode = 0644,
347 .proc_handler = proc_dointvec_minmax,
348 .extra1 = &zero,
349 .extra2 = &one,
350 },
351 #endif
352 {
353 .procname = "sched_rt_period_us",
354 .data = &sysctl_sched_rt_period,
355 .maxlen = sizeof(unsigned int),
356 .mode = 0644,
357 .proc_handler = sched_rt_handler,
358 },
359 {
360 .procname = "sched_rt_runtime_us",
361 .data = &sysctl_sched_rt_runtime,
362 .maxlen = sizeof(int),
363 .mode = 0644,
364 .proc_handler = sched_rt_handler,
365 },
366 {
367 .procname = "sched_compat_yield",
368 .data = &sysctl_sched_compat_yield,
369 .maxlen = sizeof(unsigned int),
370 .mode = 0644,
371 .proc_handler = proc_dointvec,
372 },
373 #ifdef CONFIG_SCHED_AUTOGROUP
374 {
375 .procname = "sched_autogroup_enabled",
376 .data = &sysctl_sched_autogroup_enabled,
377 .maxlen = sizeof(unsigned int),
378 .mode = 0644,
379 .proc_handler = proc_dointvec,
380 .extra1 = &zero,
381 .extra2 = &one,
382 },
383 #endif
384 #ifdef CONFIG_PROVE_LOCKING
385 {
386 .procname = "prove_locking",
387 .data = &prove_locking,
388 .maxlen = sizeof(int),
389 .mode = 0644,
390 .proc_handler = proc_dointvec,
391 },
392 #endif
393 #ifdef CONFIG_LOCK_STAT
394 {
395 .procname = "lock_stat",
396 .data = &lock_stat,
397 .maxlen = sizeof(int),
398 .mode = 0644,
399 .proc_handler = proc_dointvec,
400 },
401 #endif
402 {
403 .procname = "panic",
404 .data = &panic_timeout,
405 .maxlen = sizeof(int),
406 .mode = 0644,
407 .proc_handler = proc_dointvec,
408 },
409 {
410 .procname = "core_uses_pid",
411 .data = &core_uses_pid,
412 .maxlen = sizeof(int),
413 .mode = 0644,
414 .proc_handler = proc_dointvec,
415 },
416 {
417 .procname = "core_pattern",
418 .data = core_pattern,
419 .maxlen = CORENAME_MAX_SIZE,
420 .mode = 0644,
421 .proc_handler = proc_dostring,
422 },
423 {
424 .procname = "core_pipe_limit",
425 .data = &core_pipe_limit,
426 .maxlen = sizeof(unsigned int),
427 .mode = 0644,
428 .proc_handler = proc_dointvec,
429 },
430 #ifdef CONFIG_PROC_SYSCTL
431 {
432 .procname = "tainted",
433 .maxlen = sizeof(long),
434 .mode = 0644,
435 .proc_handler = proc_taint,
436 },
437 #endif
438 #ifdef CONFIG_LATENCYTOP
439 {
440 .procname = "latencytop",
441 .data = &latencytop_enabled,
442 .maxlen = sizeof(int),
443 .mode = 0644,
444 .proc_handler = proc_dointvec,
445 },
446 #endif
447 #ifdef CONFIG_BLK_DEV_INITRD
448 {
449 .procname = "real-root-dev",
450 .data = &real_root_dev,
451 .maxlen = sizeof(int),
452 .mode = 0644,
453 .proc_handler = proc_dointvec,
454 },
455 #endif
456 {
457 .procname = "print-fatal-signals",
458 .data = &print_fatal_signals,
459 .maxlen = sizeof(int),
460 .mode = 0644,
461 .proc_handler = proc_dointvec,
462 },
463 #ifdef CONFIG_SPARC
464 {
465 .procname = "reboot-cmd",
466 .data = reboot_command,
467 .maxlen = 256,
468 .mode = 0644,
469 .proc_handler = proc_dostring,
470 },
471 {
472 .procname = "stop-a",
473 .data = &stop_a_enabled,
474 .maxlen = sizeof (int),
475 .mode = 0644,
476 .proc_handler = proc_dointvec,
477 },
478 {
479 .procname = "scons-poweroff",
480 .data = &scons_pwroff,
481 .maxlen = sizeof (int),
482 .mode = 0644,
483 .proc_handler = proc_dointvec,
484 },
485 #endif
486 #ifdef CONFIG_SPARC64
487 {
488 .procname = "tsb-ratio",
489 .data = &sysctl_tsb_ratio,
490 .maxlen = sizeof (int),
491 .mode = 0644,
492 .proc_handler = proc_dointvec,
493 },
494 #endif
495 #ifdef __hppa__
496 {
497 .procname = "soft-power",
498 .data = &pwrsw_enabled,
499 .maxlen = sizeof (int),
500 .mode = 0644,
501 .proc_handler = proc_dointvec,
502 },
503 {
504 .procname = "unaligned-trap",
505 .data = &unaligned_enabled,
506 .maxlen = sizeof (int),
507 .mode = 0644,
508 .proc_handler = proc_dointvec,
509 },
510 #endif
511 {
512 .procname = "ctrl-alt-del",
513 .data = &C_A_D,
514 .maxlen = sizeof(int),
515 .mode = 0644,
516 .proc_handler = proc_dointvec,
517 },
518 #ifdef CONFIG_FUNCTION_TRACER
519 {
520 .procname = "ftrace_enabled",
521 .data = &ftrace_enabled,
522 .maxlen = sizeof(int),
523 .mode = 0644,
524 .proc_handler = ftrace_enable_sysctl,
525 },
526 #endif
527 #ifdef CONFIG_STACK_TRACER
528 {
529 .procname = "stack_tracer_enabled",
530 .data = &stack_tracer_enabled,
531 .maxlen = sizeof(int),
532 .mode = 0644,
533 .proc_handler = stack_trace_sysctl,
534 },
535 #endif
536 #ifdef CONFIG_TRACING
537 {
538 .procname = "ftrace_dump_on_oops",
539 .data = &ftrace_dump_on_oops,
540 .maxlen = sizeof(int),
541 .mode = 0644,
542 .proc_handler = proc_dointvec,
543 },
544 #endif
545 #ifdef CONFIG_MODULES
546 {
547 .procname = "modprobe",
548 .data = &modprobe_path,
549 .maxlen = KMOD_PATH_LEN,
550 .mode = 0644,
551 .proc_handler = proc_dostring,
552 },
553 {
554 .procname = "modules_disabled",
555 .data = &modules_disabled,
556 .maxlen = sizeof(int),
557 .mode = 0644,
558 /* only handle a transition from default "0" to "1" */
559 .proc_handler = proc_dointvec_minmax,
560 .extra1 = &one,
561 .extra2 = &one,
562 },
563 #endif
564 #ifdef CONFIG_HOTPLUG
565 {
566 .procname = "hotplug",
567 .data = &uevent_helper,
568 .maxlen = UEVENT_HELPER_PATH_LEN,
569 .mode = 0644,
570 .proc_handler = proc_dostring,
571 },
572 #endif
573 #ifdef CONFIG_CHR_DEV_SG
574 {
575 .procname = "sg-big-buff",
576 .data = &sg_big_buff,
577 .maxlen = sizeof (int),
578 .mode = 0444,
579 .proc_handler = proc_dointvec,
580 },
581 #endif
582 #ifdef CONFIG_BSD_PROCESS_ACCT
583 {
584 .procname = "acct",
585 .data = &acct_parm,
586 .maxlen = 3*sizeof(int),
587 .mode = 0644,
588 .proc_handler = proc_dointvec,
589 },
590 #endif
591 #ifdef CONFIG_MAGIC_SYSRQ
592 {
593 .procname = "sysrq",
594 .data = &__sysrq_enabled,
595 .maxlen = sizeof (int),
596 .mode = 0644,
597 .proc_handler = sysrq_sysctl_handler,
598 },
599 #endif
600 #ifdef CONFIG_PROC_SYSCTL
601 {
602 .procname = "cad_pid",
603 .data = NULL,
604 .maxlen = sizeof (int),
605 .mode = 0600,
606 .proc_handler = proc_do_cad_pid,
607 },
608 #endif
609 {
610 .procname = "threads-max",
611 .data = &max_threads,
612 .maxlen = sizeof(int),
613 .mode = 0644,
614 .proc_handler = proc_dointvec,
615 },
616 {
617 .procname = "random",
618 .mode = 0555,
619 .child = random_table,
620 },
621 {
622 .procname = "overflowuid",
623 .data = &overflowuid,
624 .maxlen = sizeof(int),
625 .mode = 0644,
626 .proc_handler = proc_dointvec_minmax,
627 .extra1 = &minolduid,
628 .extra2 = &maxolduid,
629 },
630 {
631 .procname = "overflowgid",
632 .data = &overflowgid,
633 .maxlen = sizeof(int),
634 .mode = 0644,
635 .proc_handler = proc_dointvec_minmax,
636 .extra1 = &minolduid,
637 .extra2 = &maxolduid,
638 },
639 #ifdef CONFIG_S390
640 #ifdef CONFIG_MATHEMU
641 {
642 .procname = "ieee_emulation_warnings",
643 .data = &sysctl_ieee_emulation_warnings,
644 .maxlen = sizeof(int),
645 .mode = 0644,
646 .proc_handler = proc_dointvec,
647 },
648 #endif
649 {
650 .procname = "userprocess_debug",
651 .data = &show_unhandled_signals,
652 .maxlen = sizeof(int),
653 .mode = 0644,
654 .proc_handler = proc_dointvec,
655 },
656 #endif
657 {
658 .procname = "pid_max",
659 .data = &pid_max,
660 .maxlen = sizeof (int),
661 .mode = 0644,
662 .proc_handler = proc_dointvec_minmax,
663 .extra1 = &pid_max_min,
664 .extra2 = &pid_max_max,
665 },
666 {
667 .procname = "panic_on_oops",
668 .data = &panic_on_oops,
669 .maxlen = sizeof(int),
670 .mode = 0644,
671 .proc_handler = proc_dointvec,
672 },
673 #if defined CONFIG_PRINTK
674 {
675 .procname = "printk",
676 .data = &console_loglevel,
677 .maxlen = 4*sizeof(int),
678 .mode = 0644,
679 .proc_handler = proc_dointvec,
680 },
681 {
682 .procname = "printk_ratelimit",
683 .data = &printk_ratelimit_state.interval,
684 .maxlen = sizeof(int),
685 .mode = 0644,
686 .proc_handler = proc_dointvec_jiffies,
687 },
688 {
689 .procname = "printk_ratelimit_burst",
690 .data = &printk_ratelimit_state.burst,
691 .maxlen = sizeof(int),
692 .mode = 0644,
693 .proc_handler = proc_dointvec,
694 },
695 {
696 .procname = "printk_delay",
697 .data = &printk_delay_msec,
698 .maxlen = sizeof(int),
699 .mode = 0644,
700 .proc_handler = proc_dointvec_minmax,
701 .extra1 = &zero,
702 .extra2 = &ten_thousand,
703 },
704 {
705 .procname = "dmesg_restrict",
706 .data = &dmesg_restrict,
707 .maxlen = sizeof(int),
708 .mode = 0644,
709 .proc_handler = proc_dointvec_minmax,
710 .extra1 = &zero,
711 .extra2 = &one,
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 = proc_dointvec,
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 * NOTE: do not add new entries to this table unless you have read
967 * Documentation/sysctl/ctl_unnumbered.txt
968 */
969 { }
970 };
971
972 static struct ctl_table vm_table[] = {
973 {
974 .procname = "overcommit_memory",
975 .data = &sysctl_overcommit_memory,
976 .maxlen = sizeof(sysctl_overcommit_memory),
977 .mode = 0644,
978 .proc_handler = proc_dointvec,
979 },
980 {
981 .procname = "panic_on_oom",
982 .data = &sysctl_panic_on_oom,
983 .maxlen = sizeof(sysctl_panic_on_oom),
984 .mode = 0644,
985 .proc_handler = proc_dointvec,
986 },
987 {
988 .procname = "oom_kill_allocating_task",
989 .data = &sysctl_oom_kill_allocating_task,
990 .maxlen = sizeof(sysctl_oom_kill_allocating_task),
991 .mode = 0644,
992 .proc_handler = proc_dointvec,
993 },
994 {
995 .procname = "oom_dump_tasks",
996 .data = &sysctl_oom_dump_tasks,
997 .maxlen = sizeof(sysctl_oom_dump_tasks),
998 .mode = 0644,
999 .proc_handler = proc_dointvec,
1000 },
1001 {
1002 .procname = "overcommit_ratio",
1003 .data = &sysctl_overcommit_ratio,
1004 .maxlen = sizeof(sysctl_overcommit_ratio),
1005 .mode = 0644,
1006 .proc_handler = proc_dointvec,
1007 },
1008 {
1009 .procname = "page-cluster",
1010 .data = &page_cluster,
1011 .maxlen = sizeof(int),
1012 .mode = 0644,
1013 .proc_handler = proc_dointvec,
1014 },
1015 {
1016 .procname = "dirty_background_ratio",
1017 .data = &dirty_background_ratio,
1018 .maxlen = sizeof(dirty_background_ratio),
1019 .mode = 0644,
1020 .proc_handler = dirty_background_ratio_handler,
1021 .extra1 = &zero,
1022 .extra2 = &one_hundred,
1023 },
1024 {
1025 .procname = "dirty_background_bytes",
1026 .data = &dirty_background_bytes,
1027 .maxlen = sizeof(dirty_background_bytes),
1028 .mode = 0644,
1029 .proc_handler = dirty_background_bytes_handler,
1030 .extra1 = &one_ul,
1031 },
1032 {
1033 .procname = "dirty_ratio",
1034 .data = &vm_dirty_ratio,
1035 .maxlen = sizeof(vm_dirty_ratio),
1036 .mode = 0644,
1037 .proc_handler = dirty_ratio_handler,
1038 .extra1 = &zero,
1039 .extra2 = &one_hundred,
1040 },
1041 {
1042 .procname = "dirty_bytes",
1043 .data = &vm_dirty_bytes,
1044 .maxlen = sizeof(vm_dirty_bytes),
1045 .mode = 0644,
1046 .proc_handler = dirty_bytes_handler,
1047 .extra1 = &dirty_bytes_min,
1048 },
1049 {
1050 .procname = "dirty_writeback_centisecs",
1051 .data = &dirty_writeback_interval,
1052 .maxlen = sizeof(dirty_writeback_interval),
1053 .mode = 0644,
1054 .proc_handler = dirty_writeback_centisecs_handler,
1055 },
1056 {
1057 .procname = "dirty_expire_centisecs",
1058 .data = &dirty_expire_interval,
1059 .maxlen = sizeof(dirty_expire_interval),
1060 .mode = 0644,
1061 .proc_handler = proc_dointvec,
1062 },
1063 {
1064 .procname = "nr_pdflush_threads",
1065 .data = &nr_pdflush_threads,
1066 .maxlen = sizeof nr_pdflush_threads,
1067 .mode = 0444 /* read-only*/,
1068 .proc_handler = proc_dointvec,
1069 },
1070 {
1071 .procname = "swappiness",
1072 .data = &vm_swappiness,
1073 .maxlen = sizeof(vm_swappiness),
1074 .mode = 0644,
1075 .proc_handler = proc_dointvec_minmax,
1076 .extra1 = &zero,
1077 .extra2 = &one_hundred,
1078 },
1079 #ifdef CONFIG_HUGETLB_PAGE
1080 {
1081 .procname = "nr_hugepages",
1082 .data = NULL,
1083 .maxlen = sizeof(unsigned long),
1084 .mode = 0644,
1085 .proc_handler = hugetlb_sysctl_handler,
1086 .extra1 = (void *)&hugetlb_zero,
1087 .extra2 = (void *)&hugetlb_infinity,
1088 },
1089 #ifdef CONFIG_NUMA
1090 {
1091 .procname = "nr_hugepages_mempolicy",
1092 .data = NULL,
1093 .maxlen = sizeof(unsigned long),
1094 .mode = 0644,
1095 .proc_handler = &hugetlb_mempolicy_sysctl_handler,
1096 .extra1 = (void *)&hugetlb_zero,
1097 .extra2 = (void *)&hugetlb_infinity,
1098 },
1099 #endif
1100 {
1101 .procname = "hugetlb_shm_group",
1102 .data = &sysctl_hugetlb_shm_group,
1103 .maxlen = sizeof(gid_t),
1104 .mode = 0644,
1105 .proc_handler = proc_dointvec,
1106 },
1107 {
1108 .procname = "hugepages_treat_as_movable",
1109 .data = &hugepages_treat_as_movable,
1110 .maxlen = sizeof(int),
1111 .mode = 0644,
1112 .proc_handler = hugetlb_treat_movable_handler,
1113 },
1114 {
1115 .procname = "nr_overcommit_hugepages",
1116 .data = NULL,
1117 .maxlen = sizeof(unsigned long),
1118 .mode = 0644,
1119 .proc_handler = hugetlb_overcommit_handler,
1120 .extra1 = (void *)&hugetlb_zero,
1121 .extra2 = (void *)&hugetlb_infinity,
1122 },
1123 #endif
1124 {
1125 .procname = "lowmem_reserve_ratio",
1126 .data = &sysctl_lowmem_reserve_ratio,
1127 .maxlen = sizeof(sysctl_lowmem_reserve_ratio),
1128 .mode = 0644,
1129 .proc_handler = lowmem_reserve_ratio_sysctl_handler,
1130 },
1131 {
1132 .procname = "drop_caches",
1133 .data = &sysctl_drop_caches,
1134 .maxlen = sizeof(int),
1135 .mode = 0644,
1136 .proc_handler = drop_caches_sysctl_handler,
1137 },
1138 #ifdef CONFIG_COMPACTION
1139 {
1140 .procname = "compact_memory",
1141 .data = &sysctl_compact_memory,
1142 .maxlen = sizeof(int),
1143 .mode = 0200,
1144 .proc_handler = sysctl_compaction_handler,
1145 },
1146 {
1147 .procname = "extfrag_threshold",
1148 .data = &sysctl_extfrag_threshold,
1149 .maxlen = sizeof(int),
1150 .mode = 0644,
1151 .proc_handler = sysctl_extfrag_handler,
1152 .extra1 = &min_extfrag_threshold,
1153 .extra2 = &max_extfrag_threshold,
1154 },
1155
1156 #endif /* CONFIG_COMPACTION */
1157 {
1158 .procname = "min_free_kbytes",
1159 .data = &min_free_kbytes,
1160 .maxlen = sizeof(min_free_kbytes),
1161 .mode = 0644,
1162 .proc_handler = min_free_kbytes_sysctl_handler,
1163 .extra1 = &zero,
1164 },
1165 {
1166 .procname = "percpu_pagelist_fraction",
1167 .data = &percpu_pagelist_fraction,
1168 .maxlen = sizeof(percpu_pagelist_fraction),
1169 .mode = 0644,
1170 .proc_handler = percpu_pagelist_fraction_sysctl_handler,
1171 .extra1 = &min_percpu_pagelist_fract,
1172 },
1173 #ifdef CONFIG_MMU
1174 {
1175 .procname = "max_map_count",
1176 .data = &sysctl_max_map_count,
1177 .maxlen = sizeof(sysctl_max_map_count),
1178 .mode = 0644,
1179 .proc_handler = proc_dointvec_minmax,
1180 .extra1 = &zero,
1181 },
1182 #else
1183 {
1184 .procname = "nr_trim_pages",
1185 .data = &sysctl_nr_trim_pages,
1186 .maxlen = sizeof(sysctl_nr_trim_pages),
1187 .mode = 0644,
1188 .proc_handler = proc_dointvec_minmax,
1189 .extra1 = &zero,
1190 },
1191 #endif
1192 {
1193 .procname = "laptop_mode",
1194 .data = &laptop_mode,
1195 .maxlen = sizeof(laptop_mode),
1196 .mode = 0644,
1197 .proc_handler = proc_dointvec_jiffies,
1198 },
1199 {
1200 .procname = "block_dump",
1201 .data = &block_dump,
1202 .maxlen = sizeof(block_dump),
1203 .mode = 0644,
1204 .proc_handler = proc_dointvec,
1205 .extra1 = &zero,
1206 },
1207 {
1208 .procname = "vfs_cache_pressure",
1209 .data = &sysctl_vfs_cache_pressure,
1210 .maxlen = sizeof(sysctl_vfs_cache_pressure),
1211 .mode = 0644,
1212 .proc_handler = proc_dointvec,
1213 .extra1 = &zero,
1214 },
1215 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
1216 {
1217 .procname = "legacy_va_layout",
1218 .data = &sysctl_legacy_va_layout,
1219 .maxlen = sizeof(sysctl_legacy_va_layout),
1220 .mode = 0644,
1221 .proc_handler = proc_dointvec,
1222 .extra1 = &zero,
1223 },
1224 #endif
1225 #ifdef CONFIG_NUMA
1226 {
1227 .procname = "zone_reclaim_mode",
1228 .data = &zone_reclaim_mode,
1229 .maxlen = sizeof(zone_reclaim_mode),
1230 .mode = 0644,
1231 .proc_handler = proc_dointvec,
1232 .extra1 = &zero,
1233 },
1234 {
1235 .procname = "min_unmapped_ratio",
1236 .data = &sysctl_min_unmapped_ratio,
1237 .maxlen = sizeof(sysctl_min_unmapped_ratio),
1238 .mode = 0644,
1239 .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler,
1240 .extra1 = &zero,
1241 .extra2 = &one_hundred,
1242 },
1243 {
1244 .procname = "min_slab_ratio",
1245 .data = &sysctl_min_slab_ratio,
1246 .maxlen = sizeof(sysctl_min_slab_ratio),
1247 .mode = 0644,
1248 .proc_handler = sysctl_min_slab_ratio_sysctl_handler,
1249 .extra1 = &zero,
1250 .extra2 = &one_hundred,
1251 },
1252 #endif
1253 #ifdef CONFIG_SMP
1254 {
1255 .procname = "stat_interval",
1256 .data = &sysctl_stat_interval,
1257 .maxlen = sizeof(sysctl_stat_interval),
1258 .mode = 0644,
1259 .proc_handler = proc_dointvec_jiffies,
1260 },
1261 #endif
1262 #ifdef CONFIG_MMU
1263 {
1264 .procname = "mmap_min_addr",
1265 .data = &dac_mmap_min_addr,
1266 .maxlen = sizeof(unsigned long),
1267 .mode = 0644,
1268 .proc_handler = mmap_min_addr_handler,
1269 },
1270 #endif
1271 #ifdef CONFIG_NUMA
1272 {
1273 .procname = "numa_zonelist_order",
1274 .data = &numa_zonelist_order,
1275 .maxlen = NUMA_ZONELIST_ORDER_LEN,
1276 .mode = 0644,
1277 .proc_handler = numa_zonelist_order_handler,
1278 },
1279 #endif
1280 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
1281 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
1282 {
1283 .procname = "vdso_enabled",
1284 .data = &vdso_enabled,
1285 .maxlen = sizeof(vdso_enabled),
1286 .mode = 0644,
1287 .proc_handler = proc_dointvec,
1288 .extra1 = &zero,
1289 },
1290 #endif
1291 #ifdef CONFIG_HIGHMEM
1292 {
1293 .procname = "highmem_is_dirtyable",
1294 .data = &vm_highmem_is_dirtyable,
1295 .maxlen = sizeof(vm_highmem_is_dirtyable),
1296 .mode = 0644,
1297 .proc_handler = proc_dointvec_minmax,
1298 .extra1 = &zero,
1299 .extra2 = &one,
1300 },
1301 #endif
1302 {
1303 .procname = "scan_unevictable_pages",
1304 .data = &scan_unevictable_pages,
1305 .maxlen = sizeof(scan_unevictable_pages),
1306 .mode = 0644,
1307 .proc_handler = scan_unevictable_handler,
1308 },
1309 #ifdef CONFIG_MEMORY_FAILURE
1310 {
1311 .procname = "memory_failure_early_kill",
1312 .data = &sysctl_memory_failure_early_kill,
1313 .maxlen = sizeof(sysctl_memory_failure_early_kill),
1314 .mode = 0644,
1315 .proc_handler = proc_dointvec_minmax,
1316 .extra1 = &zero,
1317 .extra2 = &one,
1318 },
1319 {
1320 .procname = "memory_failure_recovery",
1321 .data = &sysctl_memory_failure_recovery,
1322 .maxlen = sizeof(sysctl_memory_failure_recovery),
1323 .mode = 0644,
1324 .proc_handler = proc_dointvec_minmax,
1325 .extra1 = &zero,
1326 .extra2 = &one,
1327 },
1328 #endif
1329
1330 /*
1331 * NOTE: do not add new entries to this table unless you have read
1332 * Documentation/sysctl/ctl_unnumbered.txt
1333 */
1334 { }
1335 };
1336
1337 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1338 static struct ctl_table binfmt_misc_table[] = {
1339 { }
1340 };
1341 #endif
1342
1343 static struct ctl_table fs_table[] = {
1344 {
1345 .procname = "inode-nr",
1346 .data = &inodes_stat,
1347 .maxlen = 2*sizeof(int),
1348 .mode = 0444,
1349 .proc_handler = proc_nr_inodes,
1350 },
1351 {
1352 .procname = "inode-state",
1353 .data = &inodes_stat,
1354 .maxlen = 7*sizeof(int),
1355 .mode = 0444,
1356 .proc_handler = proc_nr_inodes,
1357 },
1358 {
1359 .procname = "file-nr",
1360 .data = &files_stat,
1361 .maxlen = sizeof(files_stat),
1362 .mode = 0444,
1363 .proc_handler = proc_nr_files,
1364 },
1365 {
1366 .procname = "file-max",
1367 .data = &files_stat.max_files,
1368 .maxlen = sizeof(files_stat.max_files),
1369 .mode = 0644,
1370 .proc_handler = proc_doulongvec_minmax,
1371 },
1372 {
1373 .procname = "nr_open",
1374 .data = &sysctl_nr_open,
1375 .maxlen = sizeof(int),
1376 .mode = 0644,
1377 .proc_handler = proc_dointvec_minmax,
1378 .extra1 = &sysctl_nr_open_min,
1379 .extra2 = &sysctl_nr_open_max,
1380 },
1381 {
1382 .procname = "dentry-state",
1383 .data = &dentry_stat,
1384 .maxlen = 6*sizeof(int),
1385 .mode = 0444,
1386 .proc_handler = proc_nr_dentry,
1387 },
1388 {
1389 .procname = "overflowuid",
1390 .data = &fs_overflowuid,
1391 .maxlen = sizeof(int),
1392 .mode = 0644,
1393 .proc_handler = proc_dointvec_minmax,
1394 .extra1 = &minolduid,
1395 .extra2 = &maxolduid,
1396 },
1397 {
1398 .procname = "overflowgid",
1399 .data = &fs_overflowgid,
1400 .maxlen = sizeof(int),
1401 .mode = 0644,
1402 .proc_handler = proc_dointvec_minmax,
1403 .extra1 = &minolduid,
1404 .extra2 = &maxolduid,
1405 },
1406 #ifdef CONFIG_FILE_LOCKING
1407 {
1408 .procname = "leases-enable",
1409 .data = &leases_enable,
1410 .maxlen = sizeof(int),
1411 .mode = 0644,
1412 .proc_handler = proc_dointvec,
1413 },
1414 #endif
1415 #ifdef CONFIG_DNOTIFY
1416 {
1417 .procname = "dir-notify-enable",
1418 .data = &dir_notify_enable,
1419 .maxlen = sizeof(int),
1420 .mode = 0644,
1421 .proc_handler = proc_dointvec,
1422 },
1423 #endif
1424 #ifdef CONFIG_MMU
1425 #ifdef CONFIG_FILE_LOCKING
1426 {
1427 .procname = "lease-break-time",
1428 .data = &lease_break_time,
1429 .maxlen = sizeof(int),
1430 .mode = 0644,
1431 .proc_handler = proc_dointvec,
1432 },
1433 #endif
1434 #ifdef CONFIG_AIO
1435 {
1436 .procname = "aio-nr",
1437 .data = &aio_nr,
1438 .maxlen = sizeof(aio_nr),
1439 .mode = 0444,
1440 .proc_handler = proc_doulongvec_minmax,
1441 },
1442 {
1443 .procname = "aio-max-nr",
1444 .data = &aio_max_nr,
1445 .maxlen = sizeof(aio_max_nr),
1446 .mode = 0644,
1447 .proc_handler = proc_doulongvec_minmax,
1448 },
1449 #endif /* CONFIG_AIO */
1450 #ifdef CONFIG_INOTIFY_USER
1451 {
1452 .procname = "inotify",
1453 .mode = 0555,
1454 .child = inotify_table,
1455 },
1456 #endif
1457 #ifdef CONFIG_EPOLL
1458 {
1459 .procname = "epoll",
1460 .mode = 0555,
1461 .child = epoll_table,
1462 },
1463 #endif
1464 #endif
1465 {
1466 .procname = "suid_dumpable",
1467 .data = &suid_dumpable,
1468 .maxlen = sizeof(int),
1469 .mode = 0644,
1470 .proc_handler = proc_dointvec_minmax,
1471 .extra1 = &zero,
1472 .extra2 = &two,
1473 },
1474 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1475 {
1476 .procname = "binfmt_misc",
1477 .mode = 0555,
1478 .child = binfmt_misc_table,
1479 },
1480 #endif
1481 {
1482 .procname = "pipe-max-size",
1483 .data = &pipe_max_size,
1484 .maxlen = sizeof(int),
1485 .mode = 0644,
1486 .proc_handler = &pipe_proc_fn,
1487 .extra1 = &pipe_min_size,
1488 },
1489 /*
1490 * NOTE: do not add new entries to this table unless you have read
1491 * Documentation/sysctl/ctl_unnumbered.txt
1492 */
1493 { }
1494 };
1495
1496 static struct ctl_table debug_table[] = {
1497 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || \
1498 defined(CONFIG_S390)
1499 {
1500 .procname = "exception-trace",
1501 .data = &show_unhandled_signals,
1502 .maxlen = sizeof(int),
1503 .mode = 0644,
1504 .proc_handler = proc_dointvec
1505 },
1506 #endif
1507 #if defined(CONFIG_OPTPROBES)
1508 {
1509 .procname = "kprobes-optimization",
1510 .data = &sysctl_kprobes_optimization,
1511 .maxlen = sizeof(int),
1512 .mode = 0644,
1513 .proc_handler = proc_kprobes_optimization_handler,
1514 .extra1 = &zero,
1515 .extra2 = &one,
1516 },
1517 #endif
1518 { }
1519 };
1520
1521 static struct ctl_table dev_table[] = {
1522 { }
1523 };
1524
1525 static DEFINE_SPINLOCK(sysctl_lock);
1526
1527 /* called under sysctl_lock */
1528 static int use_table(struct ctl_table_header *p)
1529 {
1530 if (unlikely(p->unregistering))
1531 return 0;
1532 p->used++;
1533 return 1;
1534 }
1535
1536 /* called under sysctl_lock */
1537 static void unuse_table(struct ctl_table_header *p)
1538 {
1539 if (!--p->used)
1540 if (unlikely(p->unregistering))
1541 complete(p->unregistering);
1542 }
1543
1544 /* called under sysctl_lock, will reacquire if has to wait */
1545 static void start_unregistering(struct ctl_table_header *p)
1546 {
1547 /*
1548 * if p->used is 0, nobody will ever touch that entry again;
1549 * we'll eliminate all paths to it before dropping sysctl_lock
1550 */
1551 if (unlikely(p->used)) {
1552 struct completion wait;
1553 init_completion(&wait);
1554 p->unregistering = &wait;
1555 spin_unlock(&sysctl_lock);
1556 wait_for_completion(&wait);
1557 spin_lock(&sysctl_lock);
1558 } else {
1559 /* anything non-NULL; we'll never dereference it */
1560 p->unregistering = ERR_PTR(-EINVAL);
1561 }
1562 /*
1563 * do not remove from the list until nobody holds it; walking the
1564 * list in do_sysctl() relies on that.
1565 */
1566 list_del_init(&p->ctl_entry);
1567 }
1568
1569 void sysctl_head_get(struct ctl_table_header *head)
1570 {
1571 spin_lock(&sysctl_lock);
1572 head->count++;
1573 spin_unlock(&sysctl_lock);
1574 }
1575
1576 void sysctl_head_put(struct ctl_table_header *head)
1577 {
1578 spin_lock(&sysctl_lock);
1579 if (!--head->count)
1580 kfree(head);
1581 spin_unlock(&sysctl_lock);
1582 }
1583
1584 struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head)
1585 {
1586 if (!head)
1587 BUG();
1588 spin_lock(&sysctl_lock);
1589 if (!use_table(head))
1590 head = ERR_PTR(-ENOENT);
1591 spin_unlock(&sysctl_lock);
1592 return head;
1593 }
1594
1595 void sysctl_head_finish(struct ctl_table_header *head)
1596 {
1597 if (!head)
1598 return;
1599 spin_lock(&sysctl_lock);
1600 unuse_table(head);
1601 spin_unlock(&sysctl_lock);
1602 }
1603
1604 static struct ctl_table_set *
1605 lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces)
1606 {
1607 struct ctl_table_set *set = &root->default_set;
1608 if (root->lookup)
1609 set = root->lookup(root, namespaces);
1610 return set;
1611 }
1612
1613 static struct list_head *
1614 lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces)
1615 {
1616 struct ctl_table_set *set = lookup_header_set(root, namespaces);
1617 return &set->list;
1618 }
1619
1620 struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces,
1621 struct ctl_table_header *prev)
1622 {
1623 struct ctl_table_root *root;
1624 struct list_head *header_list;
1625 struct ctl_table_header *head;
1626 struct list_head *tmp;
1627
1628 spin_lock(&sysctl_lock);
1629 if (prev) {
1630 head = prev;
1631 tmp = &prev->ctl_entry;
1632 unuse_table(prev);
1633 goto next;
1634 }
1635 tmp = &root_table_header.ctl_entry;
1636 for (;;) {
1637 head = list_entry(tmp, struct ctl_table_header, ctl_entry);
1638
1639 if (!use_table(head))
1640 goto next;
1641 spin_unlock(&sysctl_lock);
1642 return head;
1643 next:
1644 root = head->root;
1645 tmp = tmp->next;
1646 header_list = lookup_header_list(root, namespaces);
1647 if (tmp != header_list)
1648 continue;
1649
1650 do {
1651 root = list_entry(root->root_list.next,
1652 struct ctl_table_root, root_list);
1653 if (root == &sysctl_table_root)
1654 goto out;
1655 header_list = lookup_header_list(root, namespaces);
1656 } while (list_empty(header_list));
1657 tmp = header_list->next;
1658 }
1659 out:
1660 spin_unlock(&sysctl_lock);
1661 return NULL;
1662 }
1663
1664 struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev)
1665 {
1666 return __sysctl_head_next(current->nsproxy, prev);
1667 }
1668
1669 void register_sysctl_root(struct ctl_table_root *root)
1670 {
1671 spin_lock(&sysctl_lock);
1672 list_add_tail(&root->root_list, &sysctl_table_root.root_list);
1673 spin_unlock(&sysctl_lock);
1674 }
1675
1676 /*
1677 * sysctl_perm does NOT grant the superuser all rights automatically, because
1678 * some sysctl variables are readonly even to root.
1679 */
1680
1681 static int test_perm(int mode, int op)
1682 {
1683 if (!current_euid())
1684 mode >>= 6;
1685 else if (in_egroup_p(0))
1686 mode >>= 3;
1687 if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0)
1688 return 0;
1689 return -EACCES;
1690 }
1691
1692 int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op)
1693 {
1694 int error;
1695 int mode;
1696
1697 error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC));
1698 if (error)
1699 return error;
1700
1701 if (root->permissions)
1702 mode = root->permissions(root, current->nsproxy, table);
1703 else
1704 mode = table->mode;
1705
1706 return test_perm(mode, op);
1707 }
1708
1709 static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table)
1710 {
1711 for (; table->procname; table++) {
1712 table->parent = parent;
1713 if (table->child)
1714 sysctl_set_parent(table, table->child);
1715 }
1716 }
1717
1718 static __init int sysctl_init(void)
1719 {
1720 sysctl_set_parent(NULL, root_table);
1721 #ifdef CONFIG_SYSCTL_SYSCALL_CHECK
1722 sysctl_check_table(current->nsproxy, root_table);
1723 #endif
1724 return 0;
1725 }
1726
1727 core_initcall(sysctl_init);
1728
1729 static struct ctl_table *is_branch_in(struct ctl_table *branch,
1730 struct ctl_table *table)
1731 {
1732 struct ctl_table *p;
1733 const char *s = branch->procname;
1734
1735 /* branch should have named subdirectory as its first element */
1736 if (!s || !branch->child)
1737 return NULL;
1738
1739 /* ... and nothing else */
1740 if (branch[1].procname)
1741 return NULL;
1742
1743 /* table should contain subdirectory with the same name */
1744 for (p = table; p->procname; p++) {
1745 if (!p->child)
1746 continue;
1747 if (p->procname && strcmp(p->procname, s) == 0)
1748 return p;
1749 }
1750 return NULL;
1751 }
1752
1753 /* see if attaching q to p would be an improvement */
1754 static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q)
1755 {
1756 struct ctl_table *to = p->ctl_table, *by = q->ctl_table;
1757 struct ctl_table *next;
1758 int is_better = 0;
1759 int not_in_parent = !p->attached_by;
1760
1761 while ((next = is_branch_in(by, to)) != NULL) {
1762 if (by == q->attached_by)
1763 is_better = 1;
1764 if (to == p->attached_by)
1765 not_in_parent = 1;
1766 by = by->child;
1767 to = next->child;
1768 }
1769
1770 if (is_better && not_in_parent) {
1771 q->attached_by = by;
1772 q->attached_to = to;
1773 q->parent = p;
1774 }
1775 }
1776
1777 /**
1778 * __register_sysctl_paths - register a sysctl hierarchy
1779 * @root: List of sysctl headers to register on
1780 * @namespaces: Data to compute which lists of sysctl entries are visible
1781 * @path: The path to the directory the sysctl table is in.
1782 * @table: the top-level table structure
1783 *
1784 * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1785 * array. A completely 0 filled entry terminates the table.
1786 *
1787 * The members of the &struct ctl_table structure are used as follows:
1788 *
1789 * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not
1790 * enter a sysctl file
1791 *
1792 * data - a pointer to data for use by proc_handler
1793 *
1794 * maxlen - the maximum size in bytes of the data
1795 *
1796 * mode - the file permissions for the /proc/sys file, and for sysctl(2)
1797 *
1798 * child - a pointer to the child sysctl table if this entry is a directory, or
1799 * %NULL.
1800 *
1801 * proc_handler - the text handler routine (described below)
1802 *
1803 * de - for internal use by the sysctl routines
1804 *
1805 * extra1, extra2 - extra pointers usable by the proc handler routines
1806 *
1807 * Leaf nodes in the sysctl tree will be represented by a single file
1808 * under /proc; non-leaf nodes will be represented by directories.
1809 *
1810 * sysctl(2) can automatically manage read and write requests through
1811 * the sysctl table. The data and maxlen fields of the ctl_table
1812 * struct enable minimal validation of the values being written to be
1813 * performed, and the mode field allows minimal authentication.
1814 *
1815 * There must be a proc_handler routine for any terminal nodes
1816 * mirrored under /proc/sys (non-terminals are handled by a built-in
1817 * directory handler). Several default handlers are available to
1818 * cover common cases -
1819 *
1820 * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(),
1821 * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(),
1822 * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax()
1823 *
1824 * It is the handler's job to read the input buffer from user memory
1825 * and process it. The handler should return 0 on success.
1826 *
1827 * This routine returns %NULL on a failure to register, and a pointer
1828 * to the table header on success.
1829 */
1830 struct ctl_table_header *__register_sysctl_paths(
1831 struct ctl_table_root *root,
1832 struct nsproxy *namespaces,
1833 const struct ctl_path *path, struct ctl_table *table)
1834 {
1835 struct ctl_table_header *header;
1836 struct ctl_table *new, **prevp;
1837 unsigned int n, npath;
1838 struct ctl_table_set *set;
1839
1840 /* Count the path components */
1841 for (npath = 0; path[npath].procname; ++npath)
1842 ;
1843
1844 /*
1845 * For each path component, allocate a 2-element ctl_table array.
1846 * The first array element will be filled with the sysctl entry
1847 * for this, the second will be the sentinel (procname == 0).
1848 *
1849 * We allocate everything in one go so that we don't have to
1850 * worry about freeing additional memory in unregister_sysctl_table.
1851 */
1852 header = kzalloc(sizeof(struct ctl_table_header) +
1853 (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL);
1854 if (!header)
1855 return NULL;
1856
1857 new = (struct ctl_table *) (header + 1);
1858
1859 /* Now connect the dots */
1860 prevp = &header->ctl_table;
1861 for (n = 0; n < npath; ++n, ++path) {
1862 /* Copy the procname */
1863 new->procname = path->procname;
1864 new->mode = 0555;
1865
1866 *prevp = new;
1867 prevp = &new->child;
1868
1869 new += 2;
1870 }
1871 *prevp = table;
1872 header->ctl_table_arg = table;
1873
1874 INIT_LIST_HEAD(&header->ctl_entry);
1875 header->used = 0;
1876 header->unregistering = NULL;
1877 header->root = root;
1878 sysctl_set_parent(NULL, header->ctl_table);
1879 header->count = 1;
1880 #ifdef CONFIG_SYSCTL_SYSCALL_CHECK
1881 if (sysctl_check_table(namespaces, header->ctl_table)) {
1882 kfree(header);
1883 return NULL;
1884 }
1885 #endif
1886 spin_lock(&sysctl_lock);
1887 header->set = lookup_header_set(root, namespaces);
1888 header->attached_by = header->ctl_table;
1889 header->attached_to = root_table;
1890 header->parent = &root_table_header;
1891 for (set = header->set; set; set = set->parent) {
1892 struct ctl_table_header *p;
1893 list_for_each_entry(p, &set->list, ctl_entry) {
1894 if (p->unregistering)
1895 continue;
1896 try_attach(p, header);
1897 }
1898 }
1899 header->parent->count++;
1900 list_add_tail(&header->ctl_entry, &header->set->list);
1901 spin_unlock(&sysctl_lock);
1902
1903 return header;
1904 }
1905
1906 /**
1907 * register_sysctl_table_path - register a sysctl table hierarchy
1908 * @path: The path to the directory the sysctl table is in.
1909 * @table: the top-level table structure
1910 *
1911 * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1912 * array. A completely 0 filled entry terminates the table.
1913 *
1914 * See __register_sysctl_paths for more details.
1915 */
1916 struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
1917 struct ctl_table *table)
1918 {
1919 return __register_sysctl_paths(&sysctl_table_root, current->nsproxy,
1920 path, table);
1921 }
1922
1923 /**
1924 * register_sysctl_table - register a sysctl table hierarchy
1925 * @table: the top-level table structure
1926 *
1927 * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1928 * array. A completely 0 filled entry terminates the table.
1929 *
1930 * See register_sysctl_paths for more details.
1931 */
1932 struct ctl_table_header *register_sysctl_table(struct ctl_table *table)
1933 {
1934 static const struct ctl_path null_path[] = { {} };
1935
1936 return register_sysctl_paths(null_path, table);
1937 }
1938
1939 /**
1940 * unregister_sysctl_table - unregister a sysctl table hierarchy
1941 * @header: the header returned from register_sysctl_table
1942 *
1943 * Unregisters the sysctl table and all children. proc entries may not
1944 * actually be removed until they are no longer used by anyone.
1945 */
1946 void unregister_sysctl_table(struct ctl_table_header * header)
1947 {
1948 might_sleep();
1949
1950 if (header == NULL)
1951 return;
1952
1953 spin_lock(&sysctl_lock);
1954 start_unregistering(header);
1955 if (!--header->parent->count) {
1956 WARN_ON(1);
1957 kfree(header->parent);
1958 }
1959 if (!--header->count)
1960 kfree(header);
1961 spin_unlock(&sysctl_lock);
1962 }
1963
1964 int sysctl_is_seen(struct ctl_table_header *p)
1965 {
1966 struct ctl_table_set *set = p->set;
1967 int res;
1968 spin_lock(&sysctl_lock);
1969 if (p->unregistering)
1970 res = 0;
1971 else if (!set->is_seen)
1972 res = 1;
1973 else
1974 res = set->is_seen(set);
1975 spin_unlock(&sysctl_lock);
1976 return res;
1977 }
1978
1979 void setup_sysctl_set(struct ctl_table_set *p,
1980 struct ctl_table_set *parent,
1981 int (*is_seen)(struct ctl_table_set *))
1982 {
1983 INIT_LIST_HEAD(&p->list);
1984 p->parent = parent ? parent : &sysctl_table_root.default_set;
1985 p->is_seen = is_seen;
1986 }
1987
1988 #else /* !CONFIG_SYSCTL */
1989 struct ctl_table_header *register_sysctl_table(struct ctl_table * table)
1990 {
1991 return NULL;
1992 }
1993
1994 struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
1995 struct ctl_table *table)
1996 {
1997 return NULL;
1998 }
1999
2000 void unregister_sysctl_table(struct ctl_table_header * table)
2001 {
2002 }
2003
2004 void setup_sysctl_set(struct ctl_table_set *p,
2005 struct ctl_table_set *parent,
2006 int (*is_seen)(struct ctl_table_set *))
2007 {
2008 }
2009
2010 void sysctl_head_put(struct ctl_table_header *head)
2011 {
2012 }
2013
2014 #endif /* CONFIG_SYSCTL */
2015
2016 /*
2017 * /proc/sys support
2018 */
2019
2020 #ifdef CONFIG_PROC_SYSCTL
2021
2022 static int _proc_do_string(void* data, int maxlen, int write,
2023 void __user *buffer,
2024 size_t *lenp, loff_t *ppos)
2025 {
2026 size_t len;
2027 char __user *p;
2028 char c;
2029
2030 if (!data || !maxlen || !*lenp) {
2031 *lenp = 0;
2032 return 0;
2033 }
2034
2035 if (write) {
2036 len = 0;
2037 p = buffer;
2038 while (len < *lenp) {
2039 if (get_user(c, p++))
2040 return -EFAULT;
2041 if (c == 0 || c == '\n')
2042 break;
2043 len++;
2044 }
2045 if (len >= maxlen)
2046 len = maxlen-1;
2047 if(copy_from_user(data, buffer, len))
2048 return -EFAULT;
2049 ((char *) data)[len] = 0;
2050 *ppos += *lenp;
2051 } else {
2052 len = strlen(data);
2053 if (len > maxlen)
2054 len = maxlen;
2055
2056 if (*ppos > len) {
2057 *lenp = 0;
2058 return 0;
2059 }
2060
2061 data += *ppos;
2062 len -= *ppos;
2063
2064 if (len > *lenp)
2065 len = *lenp;
2066 if (len)
2067 if(copy_to_user(buffer, data, len))
2068 return -EFAULT;
2069 if (len < *lenp) {
2070 if(put_user('\n', ((char __user *) buffer) + len))
2071 return -EFAULT;
2072 len++;
2073 }
2074 *lenp = len;
2075 *ppos += len;
2076 }
2077 return 0;
2078 }
2079
2080 /**
2081 * proc_dostring - read a string sysctl
2082 * @table: the sysctl table
2083 * @write: %TRUE if this is a write to the sysctl file
2084 * @buffer: the user buffer
2085 * @lenp: the size of the user buffer
2086 * @ppos: file position
2087 *
2088 * Reads/writes a string from/to the user buffer. If the kernel
2089 * buffer provided is not large enough to hold the string, the
2090 * string is truncated. The copied string is %NULL-terminated.
2091 * If the string is being read by the user process, it is copied
2092 * and a newline '\n' is added. It is truncated if the buffer is
2093 * not large enough.
2094 *
2095 * Returns 0 on success.
2096 */
2097 int proc_dostring(struct ctl_table *table, int write,
2098 void __user *buffer, size_t *lenp, loff_t *ppos)
2099 {
2100 return _proc_do_string(table->data, table->maxlen, write,
2101 buffer, lenp, ppos);
2102 }
2103
2104 static size_t proc_skip_spaces(char **buf)
2105 {
2106 size_t ret;
2107 char *tmp = skip_spaces(*buf);
2108 ret = tmp - *buf;
2109 *buf = tmp;
2110 return ret;
2111 }
2112
2113 static void proc_skip_char(char **buf, size_t *size, const char v)
2114 {
2115 while (*size) {
2116 if (**buf != v)
2117 break;
2118 (*size)--;
2119 (*buf)++;
2120 }
2121 }
2122
2123 #define TMPBUFLEN 22
2124 /**
2125 * proc_get_long - reads an ASCII formatted integer from a user buffer
2126 *
2127 * @buf: a kernel buffer
2128 * @size: size of the kernel buffer
2129 * @val: this is where the number will be stored
2130 * @neg: set to %TRUE if number is negative
2131 * @perm_tr: a vector which contains the allowed trailers
2132 * @perm_tr_len: size of the perm_tr vector
2133 * @tr: pointer to store the trailer character
2134 *
2135 * In case of success %0 is returned and @buf and @size are updated with
2136 * the amount of bytes read. If @tr is non-NULL and a trailing
2137 * character exists (size is non-zero after returning from this
2138 * function), @tr is updated with the trailing character.
2139 */
2140 static int proc_get_long(char **buf, size_t *size,
2141 unsigned long *val, bool *neg,
2142 const char *perm_tr, unsigned perm_tr_len, char *tr)
2143 {
2144 int len;
2145 char *p, tmp[TMPBUFLEN];
2146
2147 if (!*size)
2148 return -EINVAL;
2149
2150 len = *size;
2151 if (len > TMPBUFLEN - 1)
2152 len = TMPBUFLEN - 1;
2153
2154 memcpy(tmp, *buf, len);
2155
2156 tmp[len] = 0;
2157 p = tmp;
2158 if (*p == '-' && *size > 1) {
2159 *neg = true;
2160 p++;
2161 } else
2162 *neg = false;
2163 if (!isdigit(*p))
2164 return -EINVAL;
2165
2166 *val = simple_strtoul(p, &p, 0);
2167
2168 len = p - tmp;
2169
2170 /* We don't know if the next char is whitespace thus we may accept
2171 * invalid integers (e.g. 1234...a) or two integers instead of one
2172 * (e.g. 123...1). So lets not allow such large numbers. */
2173 if (len == TMPBUFLEN - 1)
2174 return -EINVAL;
2175
2176 if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len))
2177 return -EINVAL;
2178
2179 if (tr && (len < *size))
2180 *tr = *p;
2181
2182 *buf += len;
2183 *size -= len;
2184
2185 return 0;
2186 }
2187
2188 /**
2189 * proc_put_long - converts an integer to a decimal ASCII formatted string
2190 *
2191 * @buf: the user buffer
2192 * @size: the size of the user buffer
2193 * @val: the integer to be converted
2194 * @neg: sign of the number, %TRUE for negative
2195 *
2196 * In case of success %0 is returned and @buf and @size are updated with
2197 * the amount of bytes written.
2198 */
2199 static int proc_put_long(void __user **buf, size_t *size, unsigned long val,
2200 bool neg)
2201 {
2202 int len;
2203 char tmp[TMPBUFLEN], *p = tmp;
2204
2205 sprintf(p, "%s%lu", neg ? "-" : "", val);
2206 len = strlen(tmp);
2207 if (len > *size)
2208 len = *size;
2209 if (copy_to_user(*buf, tmp, len))
2210 return -EFAULT;
2211 *size -= len;
2212 *buf += len;
2213 return 0;
2214 }
2215 #undef TMPBUFLEN
2216
2217 static int proc_put_char(void __user **buf, size_t *size, char c)
2218 {
2219 if (*size) {
2220 char __user **buffer = (char __user **)buf;
2221 if (put_user(c, *buffer))
2222 return -EFAULT;
2223 (*size)--, (*buffer)++;
2224 *buf = *buffer;
2225 }
2226 return 0;
2227 }
2228
2229 static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp,
2230 int *valp,
2231 int write, void *data)
2232 {
2233 if (write) {
2234 *valp = *negp ? -*lvalp : *lvalp;
2235 } else {
2236 int val = *valp;
2237 if (val < 0) {
2238 *negp = true;
2239 *lvalp = (unsigned long)-val;
2240 } else {
2241 *negp = false;
2242 *lvalp = (unsigned long)val;
2243 }
2244 }
2245 return 0;
2246 }
2247
2248 static const char proc_wspace_sep[] = { ' ', '\t', '\n' };
2249
2250 static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table,
2251 int write, void __user *buffer,
2252 size_t *lenp, loff_t *ppos,
2253 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
2254 int write, void *data),
2255 void *data)
2256 {
2257 int *i, vleft, first = 1, err = 0;
2258 unsigned long page = 0;
2259 size_t left;
2260 char *kbuf;
2261
2262 if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) {
2263 *lenp = 0;
2264 return 0;
2265 }
2266
2267 i = (int *) tbl_data;
2268 vleft = table->maxlen / sizeof(*i);
2269 left = *lenp;
2270
2271 if (!conv)
2272 conv = do_proc_dointvec_conv;
2273
2274 if (write) {
2275 if (left > PAGE_SIZE - 1)
2276 left = PAGE_SIZE - 1;
2277 page = __get_free_page(GFP_TEMPORARY);
2278 kbuf = (char *) page;
2279 if (!kbuf)
2280 return -ENOMEM;
2281 if (copy_from_user(kbuf, buffer, left)) {
2282 err = -EFAULT;
2283 goto free;
2284 }
2285 kbuf[left] = 0;
2286 }
2287
2288 for (; left && vleft--; i++, first=0) {
2289 unsigned long lval;
2290 bool neg;
2291
2292 if (write) {
2293 left -= proc_skip_spaces(&kbuf);
2294
2295 if (!left)
2296 break;
2297 err = proc_get_long(&kbuf, &left, &lval, &neg,
2298 proc_wspace_sep,
2299 sizeof(proc_wspace_sep), NULL);
2300 if (err)
2301 break;
2302 if (conv(&neg, &lval, i, 1, data)) {
2303 err = -EINVAL;
2304 break;
2305 }
2306 } else {
2307 if (conv(&neg, &lval, i, 0, data)) {
2308 err = -EINVAL;
2309 break;
2310 }
2311 if (!first)
2312 err = proc_put_char(&buffer, &left, '\t');
2313 if (err)
2314 break;
2315 err = proc_put_long(&buffer, &left, lval, neg);
2316 if (err)
2317 break;
2318 }
2319 }
2320
2321 if (!write && !first && left && !err)
2322 err = proc_put_char(&buffer, &left, '\n');
2323 if (write && !err && left)
2324 left -= proc_skip_spaces(&kbuf);
2325 free:
2326 if (write) {
2327 free_page(page);
2328 if (first)
2329 return err ? : -EINVAL;
2330 }
2331 *lenp -= left;
2332 *ppos += *lenp;
2333 return err;
2334 }
2335
2336 static int do_proc_dointvec(struct ctl_table *table, int write,
2337 void __user *buffer, size_t *lenp, loff_t *ppos,
2338 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
2339 int write, void *data),
2340 void *data)
2341 {
2342 return __do_proc_dointvec(table->data, table, write,
2343 buffer, lenp, ppos, conv, data);
2344 }
2345
2346 /**
2347 * proc_dointvec - read a vector of integers
2348 * @table: the sysctl table
2349 * @write: %TRUE if this is a write to the sysctl file
2350 * @buffer: the user buffer
2351 * @lenp: the size of the user buffer
2352 * @ppos: file position
2353 *
2354 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2355 * values from/to the user buffer, treated as an ASCII string.
2356 *
2357 * Returns 0 on success.
2358 */
2359 int proc_dointvec(struct ctl_table *table, int write,
2360 void __user *buffer, size_t *lenp, loff_t *ppos)
2361 {
2362 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2363 NULL,NULL);
2364 }
2365
2366 /*
2367 * Taint values can only be increased
2368 * This means we can safely use a temporary.
2369 */
2370 static int proc_taint(struct ctl_table *table, int write,
2371 void __user *buffer, size_t *lenp, loff_t *ppos)
2372 {
2373 struct ctl_table t;
2374 unsigned long tmptaint = get_taint();
2375 int err;
2376
2377 if (write && !capable(CAP_SYS_ADMIN))
2378 return -EPERM;
2379
2380 t = *table;
2381 t.data = &tmptaint;
2382 err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos);
2383 if (err < 0)
2384 return err;
2385
2386 if (write) {
2387 /*
2388 * Poor man's atomic or. Not worth adding a primitive
2389 * to everyone's atomic.h for this
2390 */
2391 int i;
2392 for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) {
2393 if ((tmptaint >> i) & 1)
2394 add_taint(i);
2395 }
2396 }
2397
2398 return err;
2399 }
2400
2401 struct do_proc_dointvec_minmax_conv_param {
2402 int *min;
2403 int *max;
2404 };
2405
2406 static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp,
2407 int *valp,
2408 int write, void *data)
2409 {
2410 struct do_proc_dointvec_minmax_conv_param *param = data;
2411 if (write) {
2412 int val = *negp ? -*lvalp : *lvalp;
2413 if ((param->min && *param->min > val) ||
2414 (param->max && *param->max < val))
2415 return -EINVAL;
2416 *valp = val;
2417 } else {
2418 int val = *valp;
2419 if (val < 0) {
2420 *negp = true;
2421 *lvalp = (unsigned long)-val;
2422 } else {
2423 *negp = false;
2424 *lvalp = (unsigned long)val;
2425 }
2426 }
2427 return 0;
2428 }
2429
2430 /**
2431 * proc_dointvec_minmax - read a vector of integers with min/max values
2432 * @table: the sysctl table
2433 * @write: %TRUE if this is a write to the sysctl file
2434 * @buffer: the user buffer
2435 * @lenp: the size of the user buffer
2436 * @ppos: file position
2437 *
2438 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2439 * values from/to the user buffer, treated as an ASCII string.
2440 *
2441 * This routine will ensure the values are within the range specified by
2442 * table->extra1 (min) and table->extra2 (max).
2443 *
2444 * Returns 0 on success.
2445 */
2446 int proc_dointvec_minmax(struct ctl_table *table, int write,
2447 void __user *buffer, size_t *lenp, loff_t *ppos)
2448 {
2449 struct do_proc_dointvec_minmax_conv_param param = {
2450 .min = (int *) table->extra1,
2451 .max = (int *) table->extra2,
2452 };
2453 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2454 do_proc_dointvec_minmax_conv, &param);
2455 }
2456
2457 static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write,
2458 void __user *buffer,
2459 size_t *lenp, loff_t *ppos,
2460 unsigned long convmul,
2461 unsigned long convdiv)
2462 {
2463 unsigned long *i, *min, *max;
2464 int vleft, first = 1, err = 0;
2465 unsigned long page = 0;
2466 size_t left;
2467 char *kbuf;
2468
2469 if (!data || !table->maxlen || !*lenp || (*ppos && !write)) {
2470 *lenp = 0;
2471 return 0;
2472 }
2473
2474 i = (unsigned long *) data;
2475 min = (unsigned long *) table->extra1;
2476 max = (unsigned long *) table->extra2;
2477 vleft = table->maxlen / sizeof(unsigned long);
2478 left = *lenp;
2479
2480 if (write) {
2481 if (left > PAGE_SIZE - 1)
2482 left = PAGE_SIZE - 1;
2483 page = __get_free_page(GFP_TEMPORARY);
2484 kbuf = (char *) page;
2485 if (!kbuf)
2486 return -ENOMEM;
2487 if (copy_from_user(kbuf, buffer, left)) {
2488 err = -EFAULT;
2489 goto free;
2490 }
2491 kbuf[left] = 0;
2492 }
2493
2494 for (; left && vleft--; i++, first = 0) {
2495 unsigned long val;
2496
2497 if (write) {
2498 bool neg;
2499
2500 left -= proc_skip_spaces(&kbuf);
2501
2502 err = proc_get_long(&kbuf, &left, &val, &neg,
2503 proc_wspace_sep,
2504 sizeof(proc_wspace_sep), NULL);
2505 if (err)
2506 break;
2507 if (neg)
2508 continue;
2509 if ((min && val < *min) || (max && val > *max))
2510 continue;
2511 *i = val;
2512 } else {
2513 val = convdiv * (*i) / convmul;
2514 if (!first)
2515 err = proc_put_char(&buffer, &left, '\t');
2516 err = proc_put_long(&buffer, &left, val, false);
2517 if (err)
2518 break;
2519 }
2520 }
2521
2522 if (!write && !first && left && !err)
2523 err = proc_put_char(&buffer, &left, '\n');
2524 if (write && !err)
2525 left -= proc_skip_spaces(&kbuf);
2526 free:
2527 if (write) {
2528 free_page(page);
2529 if (first)
2530 return err ? : -EINVAL;
2531 }
2532 *lenp -= left;
2533 *ppos += *lenp;
2534 return err;
2535 }
2536
2537 static int do_proc_doulongvec_minmax(struct ctl_table *table, int write,
2538 void __user *buffer,
2539 size_t *lenp, loff_t *ppos,
2540 unsigned long convmul,
2541 unsigned long convdiv)
2542 {
2543 return __do_proc_doulongvec_minmax(table->data, table, write,
2544 buffer, lenp, ppos, convmul, convdiv);
2545 }
2546
2547 /**
2548 * proc_doulongvec_minmax - read a vector of long integers with min/max values
2549 * @table: the sysctl table
2550 * @write: %TRUE if this is a write to the sysctl file
2551 * @buffer: the user buffer
2552 * @lenp: the size of the user buffer
2553 * @ppos: file position
2554 *
2555 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2556 * values from/to the user buffer, treated as an ASCII string.
2557 *
2558 * This routine will ensure the values are within the range specified by
2559 * table->extra1 (min) and table->extra2 (max).
2560 *
2561 * Returns 0 on success.
2562 */
2563 int proc_doulongvec_minmax(struct ctl_table *table, int write,
2564 void __user *buffer, size_t *lenp, loff_t *ppos)
2565 {
2566 return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l);
2567 }
2568
2569 /**
2570 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
2571 * @table: the sysctl table
2572 * @write: %TRUE if this is a write to the sysctl file
2573 * @buffer: the user buffer
2574 * @lenp: the size of the user buffer
2575 * @ppos: file position
2576 *
2577 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2578 * values from/to the user buffer, treated as an ASCII string. The values
2579 * are treated as milliseconds, and converted to jiffies when they are stored.
2580 *
2581 * This routine will ensure the values are within the range specified by
2582 * table->extra1 (min) and table->extra2 (max).
2583 *
2584 * Returns 0 on success.
2585 */
2586 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2587 void __user *buffer,
2588 size_t *lenp, loff_t *ppos)
2589 {
2590 return do_proc_doulongvec_minmax(table, write, buffer,
2591 lenp, ppos, HZ, 1000l);
2592 }
2593
2594
2595 static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp,
2596 int *valp,
2597 int write, void *data)
2598 {
2599 if (write) {
2600 if (*lvalp > LONG_MAX / HZ)
2601 return 1;
2602 *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ);
2603 } else {
2604 int val = *valp;
2605 unsigned long lval;
2606 if (val < 0) {
2607 *negp = true;
2608 lval = (unsigned long)-val;
2609 } else {
2610 *negp = false;
2611 lval = (unsigned long)val;
2612 }
2613 *lvalp = lval / HZ;
2614 }
2615 return 0;
2616 }
2617
2618 static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp,
2619 int *valp,
2620 int write, void *data)
2621 {
2622 if (write) {
2623 if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ)
2624 return 1;
2625 *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp);
2626 } else {
2627 int val = *valp;
2628 unsigned long lval;
2629 if (val < 0) {
2630 *negp = true;
2631 lval = (unsigned long)-val;
2632 } else {
2633 *negp = false;
2634 lval = (unsigned long)val;
2635 }
2636 *lvalp = jiffies_to_clock_t(lval);
2637 }
2638 return 0;
2639 }
2640
2641 static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp,
2642 int *valp,
2643 int write, void *data)
2644 {
2645 if (write) {
2646 *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp);
2647 } else {
2648 int val = *valp;
2649 unsigned long lval;
2650 if (val < 0) {
2651 *negp = true;
2652 lval = (unsigned long)-val;
2653 } else {
2654 *negp = false;
2655 lval = (unsigned long)val;
2656 }
2657 *lvalp = jiffies_to_msecs(lval);
2658 }
2659 return 0;
2660 }
2661
2662 /**
2663 * proc_dointvec_jiffies - read a vector of integers as seconds
2664 * @table: the sysctl table
2665 * @write: %TRUE if this is a write to the sysctl file
2666 * @buffer: the user buffer
2667 * @lenp: the size of the user buffer
2668 * @ppos: file position
2669 *
2670 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2671 * values from/to the user buffer, treated as an ASCII string.
2672 * The values read are assumed to be in seconds, and are converted into
2673 * jiffies.
2674 *
2675 * Returns 0 on success.
2676 */
2677 int proc_dointvec_jiffies(struct ctl_table *table, int write,
2678 void __user *buffer, size_t *lenp, loff_t *ppos)
2679 {
2680 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2681 do_proc_dointvec_jiffies_conv,NULL);
2682 }
2683
2684 /**
2685 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
2686 * @table: the sysctl table
2687 * @write: %TRUE if this is a write to the sysctl file
2688 * @buffer: the user buffer
2689 * @lenp: the size of the user buffer
2690 * @ppos: pointer to the file position
2691 *
2692 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2693 * values from/to the user buffer, treated as an ASCII string.
2694 * The values read are assumed to be in 1/USER_HZ seconds, and
2695 * are converted into jiffies.
2696 *
2697 * Returns 0 on success.
2698 */
2699 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
2700 void __user *buffer, size_t *lenp, loff_t *ppos)
2701 {
2702 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2703 do_proc_dointvec_userhz_jiffies_conv,NULL);
2704 }
2705
2706 /**
2707 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
2708 * @table: the sysctl table
2709 * @write: %TRUE if this is a write to the sysctl file
2710 * @buffer: the user buffer
2711 * @lenp: the size of the user buffer
2712 * @ppos: file position
2713 * @ppos: the current position in the file
2714 *
2715 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2716 * values from/to the user buffer, treated as an ASCII string.
2717 * The values read are assumed to be in 1/1000 seconds, and
2718 * are converted into jiffies.
2719 *
2720 * Returns 0 on success.
2721 */
2722 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
2723 void __user *buffer, size_t *lenp, loff_t *ppos)
2724 {
2725 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2726 do_proc_dointvec_ms_jiffies_conv, NULL);
2727 }
2728
2729 static int proc_do_cad_pid(struct ctl_table *table, int write,
2730 void __user *buffer, size_t *lenp, loff_t *ppos)
2731 {
2732 struct pid *new_pid;
2733 pid_t tmp;
2734 int r;
2735
2736 tmp = pid_vnr(cad_pid);
2737
2738 r = __do_proc_dointvec(&tmp, table, write, buffer,
2739 lenp, ppos, NULL, NULL);
2740 if (r || !write)
2741 return r;
2742
2743 new_pid = find_get_pid(tmp);
2744 if (!new_pid)
2745 return -ESRCH;
2746
2747 put_pid(xchg(&cad_pid, new_pid));
2748 return 0;
2749 }
2750
2751 /**
2752 * proc_do_large_bitmap - read/write from/to a large bitmap
2753 * @table: the sysctl table
2754 * @write: %TRUE if this is a write to the sysctl file
2755 * @buffer: the user buffer
2756 * @lenp: the size of the user buffer
2757 * @ppos: file position
2758 *
2759 * The bitmap is stored at table->data and the bitmap length (in bits)
2760 * in table->maxlen.
2761 *
2762 * We use a range comma separated format (e.g. 1,3-4,10-10) so that
2763 * large bitmaps may be represented in a compact manner. Writing into
2764 * the file will clear the bitmap then update it with the given input.
2765 *
2766 * Returns 0 on success.
2767 */
2768 int proc_do_large_bitmap(struct ctl_table *table, int write,
2769 void __user *buffer, size_t *lenp, loff_t *ppos)
2770 {
2771 int err = 0;
2772 bool first = 1;
2773 size_t left = *lenp;
2774 unsigned long bitmap_len = table->maxlen;
2775 unsigned long *bitmap = (unsigned long *) table->data;
2776 unsigned long *tmp_bitmap = NULL;
2777 char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c;
2778
2779 if (!bitmap_len || !left || (*ppos && !write)) {
2780 *lenp = 0;
2781 return 0;
2782 }
2783
2784 if (write) {
2785 unsigned long page = 0;
2786 char *kbuf;
2787
2788 if (left > PAGE_SIZE - 1)
2789 left = PAGE_SIZE - 1;
2790
2791 page = __get_free_page(GFP_TEMPORARY);
2792 kbuf = (char *) page;
2793 if (!kbuf)
2794 return -ENOMEM;
2795 if (copy_from_user(kbuf, buffer, left)) {
2796 free_page(page);
2797 return -EFAULT;
2798 }
2799 kbuf[left] = 0;
2800
2801 tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long),
2802 GFP_KERNEL);
2803 if (!tmp_bitmap) {
2804 free_page(page);
2805 return -ENOMEM;
2806 }
2807 proc_skip_char(&kbuf, &left, '\n');
2808 while (!err && left) {
2809 unsigned long val_a, val_b;
2810 bool neg;
2811
2812 err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a,
2813 sizeof(tr_a), &c);
2814 if (err)
2815 break;
2816 if (val_a >= bitmap_len || neg) {
2817 err = -EINVAL;
2818 break;
2819 }
2820
2821 val_b = val_a;
2822 if (left) {
2823 kbuf++;
2824 left--;
2825 }
2826
2827 if (c == '-') {
2828 err = proc_get_long(&kbuf, &left, &val_b,
2829 &neg, tr_b, sizeof(tr_b),
2830 &c);
2831 if (err)
2832 break;
2833 if (val_b >= bitmap_len || neg ||
2834 val_a > val_b) {
2835 err = -EINVAL;
2836 break;
2837 }
2838 if (left) {
2839 kbuf++;
2840 left--;
2841 }
2842 }
2843
2844 while (val_a <= val_b)
2845 set_bit(val_a++, tmp_bitmap);
2846
2847 first = 0;
2848 proc_skip_char(&kbuf, &left, '\n');
2849 }
2850 free_page(page);
2851 } else {
2852 unsigned long bit_a, bit_b = 0;
2853
2854 while (left) {
2855 bit_a = find_next_bit(bitmap, bitmap_len, bit_b);
2856 if (bit_a >= bitmap_len)
2857 break;
2858 bit_b = find_next_zero_bit(bitmap, bitmap_len,
2859 bit_a + 1) - 1;
2860
2861 if (!first) {
2862 err = proc_put_char(&buffer, &left, ',');
2863 if (err)
2864 break;
2865 }
2866 err = proc_put_long(&buffer, &left, bit_a, false);
2867 if (err)
2868 break;
2869 if (bit_a != bit_b) {
2870 err = proc_put_char(&buffer, &left, '-');
2871 if (err)
2872 break;
2873 err = proc_put_long(&buffer, &left, bit_b, false);
2874 if (err)
2875 break;
2876 }
2877
2878 first = 0; bit_b++;
2879 }
2880 if (!err)
2881 err = proc_put_char(&buffer, &left, '\n');
2882 }
2883
2884 if (!err) {
2885 if (write) {
2886 if (*ppos)
2887 bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len);
2888 else
2889 memcpy(bitmap, tmp_bitmap,
2890 BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long));
2891 }
2892 kfree(tmp_bitmap);
2893 *lenp -= left;
2894 *ppos += *lenp;
2895 return 0;
2896 } else {
2897 kfree(tmp_bitmap);
2898 return err;
2899 }
2900 }
2901
2902 #else /* CONFIG_PROC_FS */
2903
2904 int proc_dostring(struct ctl_table *table, int write,
2905 void __user *buffer, size_t *lenp, loff_t *ppos)
2906 {
2907 return -ENOSYS;
2908 }
2909
2910 int proc_dointvec(struct ctl_table *table, int write,
2911 void __user *buffer, size_t *lenp, loff_t *ppos)
2912 {
2913 return -ENOSYS;
2914 }
2915
2916 int proc_dointvec_minmax(struct ctl_table *table, int write,
2917 void __user *buffer, size_t *lenp, loff_t *ppos)
2918 {
2919 return -ENOSYS;
2920 }
2921
2922 int proc_dointvec_jiffies(struct ctl_table *table, int write,
2923 void __user *buffer, size_t *lenp, loff_t *ppos)
2924 {
2925 return -ENOSYS;
2926 }
2927
2928 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
2929 void __user *buffer, size_t *lenp, loff_t *ppos)
2930 {
2931 return -ENOSYS;
2932 }
2933
2934 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
2935 void __user *buffer, size_t *lenp, loff_t *ppos)
2936 {
2937 return -ENOSYS;
2938 }
2939
2940 int proc_doulongvec_minmax(struct ctl_table *table, int write,
2941 void __user *buffer, size_t *lenp, loff_t *ppos)
2942 {
2943 return -ENOSYS;
2944 }
2945
2946 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2947 void __user *buffer,
2948 size_t *lenp, loff_t *ppos)
2949 {
2950 return -ENOSYS;
2951 }
2952
2953
2954 #endif /* CONFIG_PROC_FS */
2955
2956 /*
2957 * No sense putting this after each symbol definition, twice,
2958 * exception granted :-)
2959 */
2960 EXPORT_SYMBOL(proc_dointvec);
2961 EXPORT_SYMBOL(proc_dointvec_jiffies);
2962 EXPORT_SYMBOL(proc_dointvec_minmax);
2963 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
2964 EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
2965 EXPORT_SYMBOL(proc_dostring);
2966 EXPORT_SYMBOL(proc_doulongvec_minmax);
2967 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
2968 EXPORT_SYMBOL(register_sysctl_table);
2969 EXPORT_SYMBOL(register_sysctl_paths);
2970 EXPORT_SYMBOL(unregister_sysctl_table);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree