2 * sysctl.c: General linux system control interface
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
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
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
21 #include <linux/module.h>
23 #include <linux/swap.h>
24 #include <linux/slab.h>
25 #include <linux/sysctl.h>
26 #include <linux/proc_fs.h>
27 #include <linux/security.h>
28 #include <linux/ctype.h>
29 #include <linux/utsname.h>
30 #include <linux/smp_lock.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/hugetlb.h>
40 #include <linux/security.h>
41 #include <linux/initrd.h>
42 #include <linux/times.h>
43 #include <linux/limits.h>
44 #include <linux/dcache.h>
45 #include <linux/syscalls.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/acpi.h>
48 #include <linux/reboot.h>
50 #include <asm/uaccess.h>
51 #include <asm/processor.h>
55 #include <asm/stacktrace.h>
59 static int deprecated_sysctl_warning(struct __sysctl_args *args);
61 #if defined(CONFIG_SYSCTL)
63 /* External variables not in a header file. */
65 extern int print_fatal_signals;
66 extern int sysctl_overcommit_memory;
67 extern int sysctl_overcommit_ratio;
68 extern int sysctl_panic_on_oom;
69 extern int sysctl_oom_kill_allocating_task;
70 extern int max_threads;
71 extern int core_uses_pid;
72 extern int suid_dumpable;
73 extern char core_pattern[];
75 extern int min_free_kbytes;
76 extern int printk_ratelimit_jiffies;
77 extern int printk_ratelimit_burst;
78 extern int pid_max_min, pid_max_max;
79 extern int sysctl_drop_caches;
80 extern int percpu_pagelist_fraction;
81 extern int compat_log;
82 extern int maps_protect;
83 extern int sysctl_stat_interval;
84 extern int latencytop_enabled;
86 /* Constants used for minimum and maximum */
87 #if defined(CONFIG_DETECT_SOFTLOCKUP) || defined(CONFIG_HIGHMEM)
91 #ifdef CONFIG_DETECT_SOFTLOCKUP
92 static int sixty = 60;
100 static int one_hundred = 100;
102 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
103 static int maxolduid = 65535;
104 static int minolduid;
105 static int min_percpu_pagelist_fract = 8;
107 static int ngroups_max = NGROUPS_MAX;
110 extern char modprobe_path[];
112 #ifdef CONFIG_CHR_DEV_SG
113 extern int sg_big_buff;
117 extern char reboot_command [];
118 extern int stop_a_enabled;
119 extern int scons_pwroff;
123 extern int pwrsw_enabled;
124 extern int unaligned_enabled;
128 #ifdef CONFIG_MATHEMU
129 extern int sysctl_ieee_emulation_warnings;
131 extern int sysctl_userprocess_debug;
132 extern int spin_retry;
135 extern int sysctl_hz_timer;
137 #ifdef CONFIG_BSD_PROCESS_ACCT
138 extern int acct_parm[];
142 extern int no_unaligned_warning;
145 #ifdef CONFIG_RT_MUTEXES
146 extern int max_lock_depth;
149 #ifdef CONFIG_SYSCTL_SYSCALL
150 static int parse_table(int __user *, int, void __user *, size_t __user *,
151 void __user *, size_t, struct ctl_table *);
155 #ifdef CONFIG_PROC_SYSCTL
156 static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp,
157 void __user *buffer, size_t *lenp, loff_t *ppos);
158 static int proc_dointvec_taint(struct ctl_table *table, int write, struct file *filp,
159 void __user *buffer, size_t *lenp, loff_t *ppos);
162 static struct ctl_table root_table[];
163 static struct ctl_table_root sysctl_table_root;
164 static struct ctl_table_header root_table_header = {
165 .ctl_table = root_table,
166 .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.header_list),
167 .root = &sysctl_table_root,
169 static struct ctl_table_root sysctl_table_root = {
170 .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list),
171 .header_list = LIST_HEAD_INIT(root_table_header.ctl_entry),
174 static struct ctl_table kern_table[];
175 static struct ctl_table vm_table[];
176 static struct ctl_table fs_table[];
177 static struct ctl_table debug_table[];
178 static struct ctl_table dev_table[];
179 extern struct ctl_table random_table[];
180 #ifdef CONFIG_INOTIFY_USER
181 extern struct ctl_table inotify_table[];
184 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
185 int sysctl_legacy_va_layout;
188 extern int prove_locking;
189 extern int lock_stat;
191 /* The default sysctl tables: */
193 static struct ctl_table root_table[] = {
195 .ctl_name = CTL_KERN,
196 .procname = "kernel",
213 .ctl_name = CTL_DEBUG,
216 .child = debug_table,
225 * NOTE: do not add new entries to this table unless you have read
226 * Documentation/sysctl/ctl_unnumbered.txt
231 #ifdef CONFIG_SCHED_DEBUG
232 static int min_sched_granularity_ns = 100000; /* 100 usecs */
233 static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */
234 static int min_wakeup_granularity_ns; /* 0 usecs */
235 static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */
238 static struct ctl_table kern_table[] = {
239 #ifdef CONFIG_SCHED_DEBUG
241 .ctl_name = CTL_UNNUMBERED,
242 .procname = "sched_min_granularity_ns",
243 .data = &sysctl_sched_min_granularity,
244 .maxlen = sizeof(unsigned int),
246 .proc_handler = &sched_nr_latency_handler,
247 .strategy = &sysctl_intvec,
248 .extra1 = &min_sched_granularity_ns,
249 .extra2 = &max_sched_granularity_ns,
252 .ctl_name = CTL_UNNUMBERED,
253 .procname = "sched_latency_ns",
254 .data = &sysctl_sched_latency,
255 .maxlen = sizeof(unsigned int),
257 .proc_handler = &sched_nr_latency_handler,
258 .strategy = &sysctl_intvec,
259 .extra1 = &min_sched_granularity_ns,
260 .extra2 = &max_sched_granularity_ns,
263 .ctl_name = CTL_UNNUMBERED,
264 .procname = "sched_wakeup_granularity_ns",
265 .data = &sysctl_sched_wakeup_granularity,
266 .maxlen = sizeof(unsigned int),
268 .proc_handler = &proc_dointvec_minmax,
269 .strategy = &sysctl_intvec,
270 .extra1 = &min_wakeup_granularity_ns,
271 .extra2 = &max_wakeup_granularity_ns,
274 .ctl_name = CTL_UNNUMBERED,
275 .procname = "sched_batch_wakeup_granularity_ns",
276 .data = &sysctl_sched_batch_wakeup_granularity,
277 .maxlen = sizeof(unsigned int),
279 .proc_handler = &proc_dointvec_minmax,
280 .strategy = &sysctl_intvec,
281 .extra1 = &min_wakeup_granularity_ns,
282 .extra2 = &max_wakeup_granularity_ns,
285 .ctl_name = CTL_UNNUMBERED,
286 .procname = "sched_child_runs_first",
287 .data = &sysctl_sched_child_runs_first,
288 .maxlen = sizeof(unsigned int),
290 .proc_handler = &proc_dointvec,
293 .ctl_name = CTL_UNNUMBERED,
294 .procname = "sched_features",
295 .data = &sysctl_sched_features,
296 .maxlen = sizeof(unsigned int),
298 .proc_handler = &proc_dointvec,
301 .ctl_name = CTL_UNNUMBERED,
302 .procname = "sched_migration_cost",
303 .data = &sysctl_sched_migration_cost,
304 .maxlen = sizeof(unsigned int),
306 .proc_handler = &proc_dointvec,
309 .ctl_name = CTL_UNNUMBERED,
310 .procname = "sched_nr_migrate",
311 .data = &sysctl_sched_nr_migrate,
312 .maxlen = sizeof(unsigned int),
314 .proc_handler = &proc_dointvec,
317 .ctl_name = CTL_UNNUMBERED,
318 .procname = "sched_rt_period_ms",
319 .data = &sysctl_sched_rt_period,
320 .maxlen = sizeof(unsigned int),
322 .proc_handler = &proc_dointvec,
325 .ctl_name = CTL_UNNUMBERED,
326 .procname = "sched_rt_ratio",
327 .data = &sysctl_sched_rt_ratio,
328 .maxlen = sizeof(unsigned int),
330 .proc_handler = &proc_dointvec,
332 #if defined(CONFIG_FAIR_GROUP_SCHED) && defined(CONFIG_SMP)
334 .ctl_name = CTL_UNNUMBERED,
335 .procname = "sched_min_bal_int_shares",
336 .data = &sysctl_sched_min_bal_int_shares,
337 .maxlen = sizeof(unsigned int),
339 .proc_handler = &proc_dointvec,
342 .ctl_name = CTL_UNNUMBERED,
343 .procname = "sched_max_bal_int_shares",
344 .data = &sysctl_sched_max_bal_int_shares,
345 .maxlen = sizeof(unsigned int),
347 .proc_handler = &proc_dointvec,
352 .ctl_name = CTL_UNNUMBERED,
353 .procname = "sched_compat_yield",
354 .data = &sysctl_sched_compat_yield,
355 .maxlen = sizeof(unsigned int),
357 .proc_handler = &proc_dointvec,
359 #ifdef CONFIG_PROVE_LOCKING
361 .ctl_name = CTL_UNNUMBERED,
362 .procname = "prove_locking",
363 .data = &prove_locking,
364 .maxlen = sizeof(int),
366 .proc_handler = &proc_dointvec,
369 #ifdef CONFIG_LOCK_STAT
371 .ctl_name = CTL_UNNUMBERED,
372 .procname = "lock_stat",
374 .maxlen = sizeof(int),
376 .proc_handler = &proc_dointvec,
380 .ctl_name = KERN_PANIC,
382 .data = &panic_timeout,
383 .maxlen = sizeof(int),
385 .proc_handler = &proc_dointvec,
388 .ctl_name = KERN_CORE_USES_PID,
389 .procname = "core_uses_pid",
390 .data = &core_uses_pid,
391 .maxlen = sizeof(int),
393 .proc_handler = &proc_dointvec,
396 .ctl_name = KERN_CORE_PATTERN,
397 .procname = "core_pattern",
398 .data = core_pattern,
399 .maxlen = CORENAME_MAX_SIZE,
401 .proc_handler = &proc_dostring,
402 .strategy = &sysctl_string,
404 #ifdef CONFIG_PROC_SYSCTL
406 .procname = "tainted",
408 .maxlen = sizeof(int),
410 .proc_handler = &proc_dointvec_taint,
413 #ifdef CONFIG_LATENCYTOP
415 .procname = "latencytop",
416 .data = &latencytop_enabled,
417 .maxlen = sizeof(int),
419 .proc_handler = &proc_dointvec,
422 #ifdef CONFIG_SECURITY_CAPABILITIES
424 .procname = "cap-bound",
426 .maxlen = sizeof(kernel_cap_t),
428 .proc_handler = &proc_dointvec_bset,
430 #endif /* def CONFIG_SECURITY_CAPABILITIES */
431 #ifdef CONFIG_BLK_DEV_INITRD
433 .ctl_name = KERN_REALROOTDEV,
434 .procname = "real-root-dev",
435 .data = &real_root_dev,
436 .maxlen = sizeof(int),
438 .proc_handler = &proc_dointvec,
442 .ctl_name = CTL_UNNUMBERED,
443 .procname = "print-fatal-signals",
444 .data = &print_fatal_signals,
445 .maxlen = sizeof(int),
447 .proc_handler = &proc_dointvec,
451 .ctl_name = KERN_SPARC_REBOOT,
452 .procname = "reboot-cmd",
453 .data = reboot_command,
456 .proc_handler = &proc_dostring,
457 .strategy = &sysctl_string,
460 .ctl_name = KERN_SPARC_STOP_A,
461 .procname = "stop-a",
462 .data = &stop_a_enabled,
463 .maxlen = sizeof (int),
465 .proc_handler = &proc_dointvec,
468 .ctl_name = KERN_SPARC_SCONS_PWROFF,
469 .procname = "scons-poweroff",
470 .data = &scons_pwroff,
471 .maxlen = sizeof (int),
473 .proc_handler = &proc_dointvec,
478 .ctl_name = KERN_HPPA_PWRSW,
479 .procname = "soft-power",
480 .data = &pwrsw_enabled,
481 .maxlen = sizeof (int),
483 .proc_handler = &proc_dointvec,
486 .ctl_name = KERN_HPPA_UNALIGNED,
487 .procname = "unaligned-trap",
488 .data = &unaligned_enabled,
489 .maxlen = sizeof (int),
491 .proc_handler = &proc_dointvec,
495 .ctl_name = KERN_CTLALTDEL,
496 .procname = "ctrl-alt-del",
498 .maxlen = sizeof(int),
500 .proc_handler = &proc_dointvec,
503 .ctl_name = KERN_PRINTK,
504 .procname = "printk",
505 .data = &console_loglevel,
506 .maxlen = 4*sizeof(int),
508 .proc_handler = &proc_dointvec,
512 .ctl_name = KERN_MODPROBE,
513 .procname = "modprobe",
514 .data = &modprobe_path,
515 .maxlen = KMOD_PATH_LEN,
517 .proc_handler = &proc_dostring,
518 .strategy = &sysctl_string,
521 #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
523 .ctl_name = KERN_HOTPLUG,
524 .procname = "hotplug",
525 .data = &uevent_helper,
526 .maxlen = UEVENT_HELPER_PATH_LEN,
528 .proc_handler = &proc_dostring,
529 .strategy = &sysctl_string,
532 #ifdef CONFIG_CHR_DEV_SG
534 .ctl_name = KERN_SG_BIG_BUFF,
535 .procname = "sg-big-buff",
536 .data = &sg_big_buff,
537 .maxlen = sizeof (int),
539 .proc_handler = &proc_dointvec,
542 #ifdef CONFIG_BSD_PROCESS_ACCT
544 .ctl_name = KERN_ACCT,
547 .maxlen = 3*sizeof(int),
549 .proc_handler = &proc_dointvec,
552 #ifdef CONFIG_MAGIC_SYSRQ
554 .ctl_name = KERN_SYSRQ,
556 .data = &__sysrq_enabled,
557 .maxlen = sizeof (int),
559 .proc_handler = &proc_dointvec,
562 #ifdef CONFIG_PROC_SYSCTL
564 .procname = "cad_pid",
566 .maxlen = sizeof (int),
568 .proc_handler = &proc_do_cad_pid,
572 .ctl_name = KERN_MAX_THREADS,
573 .procname = "threads-max",
574 .data = &max_threads,
575 .maxlen = sizeof(int),
577 .proc_handler = &proc_dointvec,
580 .ctl_name = KERN_RANDOM,
581 .procname = "random",
583 .child = random_table,
586 .ctl_name = KERN_OVERFLOWUID,
587 .procname = "overflowuid",
588 .data = &overflowuid,
589 .maxlen = sizeof(int),
591 .proc_handler = &proc_dointvec_minmax,
592 .strategy = &sysctl_intvec,
593 .extra1 = &minolduid,
594 .extra2 = &maxolduid,
597 .ctl_name = KERN_OVERFLOWGID,
598 .procname = "overflowgid",
599 .data = &overflowgid,
600 .maxlen = sizeof(int),
602 .proc_handler = &proc_dointvec_minmax,
603 .strategy = &sysctl_intvec,
604 .extra1 = &minolduid,
605 .extra2 = &maxolduid,
608 #ifdef CONFIG_MATHEMU
610 .ctl_name = KERN_IEEE_EMULATION_WARNINGS,
611 .procname = "ieee_emulation_warnings",
612 .data = &sysctl_ieee_emulation_warnings,
613 .maxlen = sizeof(int),
615 .proc_handler = &proc_dointvec,
618 #ifdef CONFIG_NO_IDLE_HZ
620 .ctl_name = KERN_HZ_TIMER,
621 .procname = "hz_timer",
622 .data = &sysctl_hz_timer,
623 .maxlen = sizeof(int),
625 .proc_handler = &proc_dointvec,
629 .ctl_name = KERN_S390_USER_DEBUG_LOGGING,
630 .procname = "userprocess_debug",
631 .data = &sysctl_userprocess_debug,
632 .maxlen = sizeof(int),
634 .proc_handler = &proc_dointvec,
638 .ctl_name = KERN_PIDMAX,
639 .procname = "pid_max",
641 .maxlen = sizeof (int),
643 .proc_handler = &proc_dointvec_minmax,
644 .strategy = sysctl_intvec,
645 .extra1 = &pid_max_min,
646 .extra2 = &pid_max_max,
649 .ctl_name = KERN_PANIC_ON_OOPS,
650 .procname = "panic_on_oops",
651 .data = &panic_on_oops,
652 .maxlen = sizeof(int),
654 .proc_handler = &proc_dointvec,
657 .ctl_name = KERN_PRINTK_RATELIMIT,
658 .procname = "printk_ratelimit",
659 .data = &printk_ratelimit_jiffies,
660 .maxlen = sizeof(int),
662 .proc_handler = &proc_dointvec_jiffies,
663 .strategy = &sysctl_jiffies,
666 .ctl_name = KERN_PRINTK_RATELIMIT_BURST,
667 .procname = "printk_ratelimit_burst",
668 .data = &printk_ratelimit_burst,
669 .maxlen = sizeof(int),
671 .proc_handler = &proc_dointvec,
674 .ctl_name = KERN_NGROUPS_MAX,
675 .procname = "ngroups_max",
676 .data = &ngroups_max,
677 .maxlen = sizeof (int),
679 .proc_handler = &proc_dointvec,
681 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
683 .ctl_name = KERN_UNKNOWN_NMI_PANIC,
684 .procname = "unknown_nmi_panic",
685 .data = &unknown_nmi_panic,
686 .maxlen = sizeof (int),
688 .proc_handler = &proc_dointvec,
691 .procname = "nmi_watchdog",
692 .data = &nmi_watchdog_enabled,
693 .maxlen = sizeof (int),
695 .proc_handler = &proc_nmi_enabled,
698 #if defined(CONFIG_X86)
700 .ctl_name = KERN_PANIC_ON_NMI,
701 .procname = "panic_on_unrecovered_nmi",
702 .data = &panic_on_unrecovered_nmi,
703 .maxlen = sizeof(int),
705 .proc_handler = &proc_dointvec,
708 .ctl_name = KERN_BOOTLOADER_TYPE,
709 .procname = "bootloader_type",
710 .data = &bootloader_type,
711 .maxlen = sizeof (int),
713 .proc_handler = &proc_dointvec,
716 .ctl_name = CTL_UNNUMBERED,
717 .procname = "kstack_depth_to_print",
718 .data = &kstack_depth_to_print,
719 .maxlen = sizeof(int),
721 .proc_handler = &proc_dointvec,
724 .ctl_name = CTL_UNNUMBERED,
725 .procname = "io_delay_type",
726 .data = &io_delay_type,
727 .maxlen = sizeof(int),
729 .proc_handler = &proc_dointvec,
732 #if defined(CONFIG_MMU)
734 .ctl_name = KERN_RANDOMIZE,
735 .procname = "randomize_va_space",
736 .data = &randomize_va_space,
737 .maxlen = sizeof(int),
739 .proc_handler = &proc_dointvec,
742 #if defined(CONFIG_S390) && defined(CONFIG_SMP)
744 .ctl_name = KERN_SPIN_RETRY,
745 .procname = "spin_retry",
747 .maxlen = sizeof (int),
749 .proc_handler = &proc_dointvec,
752 #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
754 .procname = "acpi_video_flags",
755 .data = &acpi_realmode_flags,
756 .maxlen = sizeof (unsigned long),
758 .proc_handler = &proc_doulongvec_minmax,
763 .ctl_name = KERN_IA64_UNALIGNED,
764 .procname = "ignore-unaligned-usertrap",
765 .data = &no_unaligned_warning,
766 .maxlen = sizeof (int),
768 .proc_handler = &proc_dointvec,
771 #ifdef CONFIG_DETECT_SOFTLOCKUP
773 .ctl_name = CTL_UNNUMBERED,
774 .procname = "softlockup_thresh",
775 .data = &softlockup_thresh,
776 .maxlen = sizeof(unsigned long),
778 .proc_handler = &proc_doulongvec_minmax,
779 .strategy = &sysctl_intvec,
784 .ctl_name = CTL_UNNUMBERED,
785 .procname = "hung_task_check_count",
786 .data = &sysctl_hung_task_check_count,
787 .maxlen = sizeof(unsigned long),
789 .proc_handler = &proc_doulongvec_minmax,
790 .strategy = &sysctl_intvec,
793 .ctl_name = CTL_UNNUMBERED,
794 .procname = "hung_task_timeout_secs",
795 .data = &sysctl_hung_task_timeout_secs,
796 .maxlen = sizeof(unsigned long),
798 .proc_handler = &proc_doulongvec_minmax,
799 .strategy = &sysctl_intvec,
802 .ctl_name = CTL_UNNUMBERED,
803 .procname = "hung_task_warnings",
804 .data = &sysctl_hung_task_warnings,
805 .maxlen = sizeof(unsigned long),
807 .proc_handler = &proc_doulongvec_minmax,
808 .strategy = &sysctl_intvec,
813 .ctl_name = KERN_COMPAT_LOG,
814 .procname = "compat-log",
816 .maxlen = sizeof (int),
818 .proc_handler = &proc_dointvec,
821 #ifdef CONFIG_RT_MUTEXES
823 .ctl_name = KERN_MAX_LOCK_DEPTH,
824 .procname = "max_lock_depth",
825 .data = &max_lock_depth,
826 .maxlen = sizeof(int),
828 .proc_handler = &proc_dointvec,
831 #ifdef CONFIG_PROC_FS
833 .ctl_name = CTL_UNNUMBERED,
834 .procname = "maps_protect",
835 .data = &maps_protect,
836 .maxlen = sizeof(int),
838 .proc_handler = &proc_dointvec,
842 .ctl_name = CTL_UNNUMBERED,
843 .procname = "poweroff_cmd",
844 .data = &poweroff_cmd,
845 .maxlen = POWEROFF_CMD_PATH_LEN,
847 .proc_handler = &proc_dostring,
848 .strategy = &sysctl_string,
851 * NOTE: do not add new entries to this table unless you have read
852 * Documentation/sysctl/ctl_unnumbered.txt
857 static struct ctl_table vm_table[] = {
859 .ctl_name = VM_OVERCOMMIT_MEMORY,
860 .procname = "overcommit_memory",
861 .data = &sysctl_overcommit_memory,
862 .maxlen = sizeof(sysctl_overcommit_memory),
864 .proc_handler = &proc_dointvec,
867 .ctl_name = VM_PANIC_ON_OOM,
868 .procname = "panic_on_oom",
869 .data = &sysctl_panic_on_oom,
870 .maxlen = sizeof(sysctl_panic_on_oom),
872 .proc_handler = &proc_dointvec,
875 .ctl_name = CTL_UNNUMBERED,
876 .procname = "oom_kill_allocating_task",
877 .data = &sysctl_oom_kill_allocating_task,
878 .maxlen = sizeof(sysctl_oom_kill_allocating_task),
880 .proc_handler = &proc_dointvec,
883 .ctl_name = VM_OVERCOMMIT_RATIO,
884 .procname = "overcommit_ratio",
885 .data = &sysctl_overcommit_ratio,
886 .maxlen = sizeof(sysctl_overcommit_ratio),
888 .proc_handler = &proc_dointvec,
891 .ctl_name = VM_PAGE_CLUSTER,
892 .procname = "page-cluster",
893 .data = &page_cluster,
894 .maxlen = sizeof(int),
896 .proc_handler = &proc_dointvec,
899 .ctl_name = VM_DIRTY_BACKGROUND,
900 .procname = "dirty_background_ratio",
901 .data = &dirty_background_ratio,
902 .maxlen = sizeof(dirty_background_ratio),
904 .proc_handler = &proc_dointvec_minmax,
905 .strategy = &sysctl_intvec,
907 .extra2 = &one_hundred,
910 .ctl_name = VM_DIRTY_RATIO,
911 .procname = "dirty_ratio",
912 .data = &vm_dirty_ratio,
913 .maxlen = sizeof(vm_dirty_ratio),
915 .proc_handler = &dirty_ratio_handler,
916 .strategy = &sysctl_intvec,
918 .extra2 = &one_hundred,
921 .procname = "dirty_writeback_centisecs",
922 .data = &dirty_writeback_interval,
923 .maxlen = sizeof(dirty_writeback_interval),
925 .proc_handler = &dirty_writeback_centisecs_handler,
928 .procname = "dirty_expire_centisecs",
929 .data = &dirty_expire_interval,
930 .maxlen = sizeof(dirty_expire_interval),
932 .proc_handler = &proc_dointvec_userhz_jiffies,
935 .ctl_name = VM_NR_PDFLUSH_THREADS,
936 .procname = "nr_pdflush_threads",
937 .data = &nr_pdflush_threads,
938 .maxlen = sizeof nr_pdflush_threads,
939 .mode = 0444 /* read-only*/,
940 .proc_handler = &proc_dointvec,
943 .ctl_name = VM_SWAPPINESS,
944 .procname = "swappiness",
945 .data = &vm_swappiness,
946 .maxlen = sizeof(vm_swappiness),
948 .proc_handler = &proc_dointvec_minmax,
949 .strategy = &sysctl_intvec,
951 .extra2 = &one_hundred,
953 #ifdef CONFIG_HUGETLB_PAGE
955 .procname = "nr_hugepages",
956 .data = &max_huge_pages,
957 .maxlen = sizeof(unsigned long),
959 .proc_handler = &hugetlb_sysctl_handler,
960 .extra1 = (void *)&hugetlb_zero,
961 .extra2 = (void *)&hugetlb_infinity,
964 .ctl_name = VM_HUGETLB_GROUP,
965 .procname = "hugetlb_shm_group",
966 .data = &sysctl_hugetlb_shm_group,
967 .maxlen = sizeof(gid_t),
969 .proc_handler = &proc_dointvec,
972 .ctl_name = CTL_UNNUMBERED,
973 .procname = "hugepages_treat_as_movable",
974 .data = &hugepages_treat_as_movable,
975 .maxlen = sizeof(int),
977 .proc_handler = &hugetlb_treat_movable_handler,
980 .ctl_name = CTL_UNNUMBERED,
981 .procname = "nr_overcommit_hugepages",
982 .data = &nr_overcommit_huge_pages,
983 .maxlen = sizeof(nr_overcommit_huge_pages),
985 .proc_handler = &proc_doulongvec_minmax,
989 .ctl_name = VM_LOWMEM_RESERVE_RATIO,
990 .procname = "lowmem_reserve_ratio",
991 .data = &sysctl_lowmem_reserve_ratio,
992 .maxlen = sizeof(sysctl_lowmem_reserve_ratio),
994 .proc_handler = &lowmem_reserve_ratio_sysctl_handler,
995 .strategy = &sysctl_intvec,
998 .ctl_name = VM_DROP_PAGECACHE,
999 .procname = "drop_caches",
1000 .data = &sysctl_drop_caches,
1001 .maxlen = sizeof(int),
1003 .proc_handler = drop_caches_sysctl_handler,
1004 .strategy = &sysctl_intvec,
1007 .ctl_name = VM_MIN_FREE_KBYTES,
1008 .procname = "min_free_kbytes",
1009 .data = &min_free_kbytes,
1010 .maxlen = sizeof(min_free_kbytes),
1012 .proc_handler = &min_free_kbytes_sysctl_handler,
1013 .strategy = &sysctl_intvec,
1017 .ctl_name = VM_PERCPU_PAGELIST_FRACTION,
1018 .procname = "percpu_pagelist_fraction",
1019 .data = &percpu_pagelist_fraction,
1020 .maxlen = sizeof(percpu_pagelist_fraction),
1022 .proc_handler = &percpu_pagelist_fraction_sysctl_handler,
1023 .strategy = &sysctl_intvec,
1024 .extra1 = &min_percpu_pagelist_fract,
1028 .ctl_name = VM_MAX_MAP_COUNT,
1029 .procname = "max_map_count",
1030 .data = &sysctl_max_map_count,
1031 .maxlen = sizeof(sysctl_max_map_count),
1033 .proc_handler = &proc_dointvec
1037 .ctl_name = VM_LAPTOP_MODE,
1038 .procname = "laptop_mode",
1039 .data = &laptop_mode,
1040 .maxlen = sizeof(laptop_mode),
1042 .proc_handler = &proc_dointvec_jiffies,
1043 .strategy = &sysctl_jiffies,
1046 .ctl_name = VM_BLOCK_DUMP,
1047 .procname = "block_dump",
1048 .data = &block_dump,
1049 .maxlen = sizeof(block_dump),
1051 .proc_handler = &proc_dointvec,
1052 .strategy = &sysctl_intvec,
1056 .ctl_name = VM_VFS_CACHE_PRESSURE,
1057 .procname = "vfs_cache_pressure",
1058 .data = &sysctl_vfs_cache_pressure,
1059 .maxlen = sizeof(sysctl_vfs_cache_pressure),
1061 .proc_handler = &proc_dointvec,
1062 .strategy = &sysctl_intvec,
1065 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
1067 .ctl_name = VM_LEGACY_VA_LAYOUT,
1068 .procname = "legacy_va_layout",
1069 .data = &sysctl_legacy_va_layout,
1070 .maxlen = sizeof(sysctl_legacy_va_layout),
1072 .proc_handler = &proc_dointvec,
1073 .strategy = &sysctl_intvec,
1079 .ctl_name = VM_ZONE_RECLAIM_MODE,
1080 .procname = "zone_reclaim_mode",
1081 .data = &zone_reclaim_mode,
1082 .maxlen = sizeof(zone_reclaim_mode),
1084 .proc_handler = &proc_dointvec,
1085 .strategy = &sysctl_intvec,
1089 .ctl_name = VM_MIN_UNMAPPED,
1090 .procname = "min_unmapped_ratio",
1091 .data = &sysctl_min_unmapped_ratio,
1092 .maxlen = sizeof(sysctl_min_unmapped_ratio),
1094 .proc_handler = &sysctl_min_unmapped_ratio_sysctl_handler,
1095 .strategy = &sysctl_intvec,
1097 .extra2 = &one_hundred,
1100 .ctl_name = VM_MIN_SLAB,
1101 .procname = "min_slab_ratio",
1102 .data = &sysctl_min_slab_ratio,
1103 .maxlen = sizeof(sysctl_min_slab_ratio),
1105 .proc_handler = &sysctl_min_slab_ratio_sysctl_handler,
1106 .strategy = &sysctl_intvec,
1108 .extra2 = &one_hundred,
1113 .ctl_name = CTL_UNNUMBERED,
1114 .procname = "stat_interval",
1115 .data = &sysctl_stat_interval,
1116 .maxlen = sizeof(sysctl_stat_interval),
1118 .proc_handler = &proc_dointvec_jiffies,
1119 .strategy = &sysctl_jiffies,
1122 #ifdef CONFIG_SECURITY
1124 .ctl_name = CTL_UNNUMBERED,
1125 .procname = "mmap_min_addr",
1126 .data = &mmap_min_addr,
1127 .maxlen = sizeof(unsigned long),
1129 .proc_handler = &proc_doulongvec_minmax,
1134 .ctl_name = CTL_UNNUMBERED,
1135 .procname = "numa_zonelist_order",
1136 .data = &numa_zonelist_order,
1137 .maxlen = NUMA_ZONELIST_ORDER_LEN,
1139 .proc_handler = &numa_zonelist_order_handler,
1140 .strategy = &sysctl_string,
1143 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
1144 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
1146 .ctl_name = VM_VDSO_ENABLED,
1147 .procname = "vdso_enabled",
1148 .data = &vdso_enabled,
1149 .maxlen = sizeof(vdso_enabled),
1151 .proc_handler = &proc_dointvec,
1152 .strategy = &sysctl_intvec,
1156 #ifdef CONFIG_HIGHMEM
1158 .ctl_name = CTL_UNNUMBERED,
1159 .procname = "highmem_is_dirtyable",
1160 .data = &vm_highmem_is_dirtyable,
1161 .maxlen = sizeof(vm_highmem_is_dirtyable),
1163 .proc_handler = &proc_dointvec_minmax,
1164 .strategy = &sysctl_intvec,
1170 * NOTE: do not add new entries to this table unless you have read
1171 * Documentation/sysctl/ctl_unnumbered.txt
1176 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1177 static struct ctl_table binfmt_misc_table[] = {
1182 static struct ctl_table fs_table[] = {
1184 .ctl_name = FS_NRINODE,
1185 .procname = "inode-nr",
1186 .data = &inodes_stat,
1187 .maxlen = 2*sizeof(int),
1189 .proc_handler = &proc_dointvec,
1192 .ctl_name = FS_STATINODE,
1193 .procname = "inode-state",
1194 .data = &inodes_stat,
1195 .maxlen = 7*sizeof(int),
1197 .proc_handler = &proc_dointvec,
1200 .procname = "file-nr",
1201 .data = &files_stat,
1202 .maxlen = 3*sizeof(int),
1204 .proc_handler = &proc_nr_files,
1207 .ctl_name = FS_MAXFILE,
1208 .procname = "file-max",
1209 .data = &files_stat.max_files,
1210 .maxlen = sizeof(int),
1212 .proc_handler = &proc_dointvec,
1215 .ctl_name = FS_DENTRY,
1216 .procname = "dentry-state",
1217 .data = &dentry_stat,
1218 .maxlen = 6*sizeof(int),
1220 .proc_handler = &proc_dointvec,
1223 .ctl_name = FS_OVERFLOWUID,
1224 .procname = "overflowuid",
1225 .data = &fs_overflowuid,
1226 .maxlen = sizeof(int),
1228 .proc_handler = &proc_dointvec_minmax,
1229 .strategy = &sysctl_intvec,
1230 .extra1 = &minolduid,
1231 .extra2 = &maxolduid,
1234 .ctl_name = FS_OVERFLOWGID,
1235 .procname = "overflowgid",
1236 .data = &fs_overflowgid,
1237 .maxlen = sizeof(int),
1239 .proc_handler = &proc_dointvec_minmax,
1240 .strategy = &sysctl_intvec,
1241 .extra1 = &minolduid,
1242 .extra2 = &maxolduid,
1245 .ctl_name = FS_LEASES,
1246 .procname = "leases-enable",
1247 .data = &leases_enable,
1248 .maxlen = sizeof(int),
1250 .proc_handler = &proc_dointvec,
1252 #ifdef CONFIG_DNOTIFY
1254 .ctl_name = FS_DIR_NOTIFY,
1255 .procname = "dir-notify-enable",
1256 .data = &dir_notify_enable,
1257 .maxlen = sizeof(int),
1259 .proc_handler = &proc_dointvec,
1264 .ctl_name = FS_LEASE_TIME,
1265 .procname = "lease-break-time",
1266 .data = &lease_break_time,
1267 .maxlen = sizeof(int),
1269 .proc_handler = &proc_dointvec_minmax,
1270 .strategy = &sysctl_intvec,
1275 .procname = "aio-nr",
1277 .maxlen = sizeof(aio_nr),
1279 .proc_handler = &proc_doulongvec_minmax,
1282 .procname = "aio-max-nr",
1283 .data = &aio_max_nr,
1284 .maxlen = sizeof(aio_max_nr),
1286 .proc_handler = &proc_doulongvec_minmax,
1288 #ifdef CONFIG_INOTIFY_USER
1290 .ctl_name = FS_INOTIFY,
1291 .procname = "inotify",
1293 .child = inotify_table,
1298 .ctl_name = KERN_SETUID_DUMPABLE,
1299 .procname = "suid_dumpable",
1300 .data = &suid_dumpable,
1301 .maxlen = sizeof(int),
1303 .proc_handler = &proc_dointvec,
1305 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1307 .ctl_name = CTL_UNNUMBERED,
1308 .procname = "binfmt_misc",
1310 .child = binfmt_misc_table,
1314 * NOTE: do not add new entries to this table unless you have read
1315 * Documentation/sysctl/ctl_unnumbered.txt
1320 static struct ctl_table debug_table[] = {
1321 #if defined(CONFIG_X86) || defined(CONFIG_PPC)
1323 .ctl_name = CTL_UNNUMBERED,
1324 .procname = "exception-trace",
1325 .data = &show_unhandled_signals,
1326 .maxlen = sizeof(int),
1328 .proc_handler = proc_dointvec
1334 static struct ctl_table dev_table[] = {
1338 static DEFINE_SPINLOCK(sysctl_lock);
1340 /* called under sysctl_lock */
1341 static int use_table(struct ctl_table_header *p)
1343 if (unlikely(p->unregistering))
1349 /* called under sysctl_lock */
1350 static void unuse_table(struct ctl_table_header *p)
1353 if (unlikely(p->unregistering))
1354 complete(p->unregistering);
1357 /* called under sysctl_lock, will reacquire if has to wait */
1358 static void start_unregistering(struct ctl_table_header *p)
1361 * if p->used is 0, nobody will ever touch that entry again;
1362 * we'll eliminate all paths to it before dropping sysctl_lock
1364 if (unlikely(p->used)) {
1365 struct completion wait;
1366 init_completion(&wait);
1367 p->unregistering = &wait;
1368 spin_unlock(&sysctl_lock);
1369 wait_for_completion(&wait);
1370 spin_lock(&sysctl_lock);
1373 * do not remove from the list until nobody holds it; walking the
1374 * list in do_sysctl() relies on that.
1376 list_del_init(&p->ctl_entry);
1379 void sysctl_head_finish(struct ctl_table_header *head)
1383 spin_lock(&sysctl_lock);
1385 spin_unlock(&sysctl_lock);
1388 static struct list_head *
1389 lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces)
1391 struct list_head *header_list;
1392 header_list = &root->header_list;
1394 header_list = root->lookup(root, namespaces);
1398 struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces,
1399 struct ctl_table_header *prev)
1401 struct ctl_table_root *root;
1402 struct list_head *header_list;
1403 struct ctl_table_header *head;
1404 struct list_head *tmp;
1406 spin_lock(&sysctl_lock);
1409 tmp = &prev->ctl_entry;
1413 tmp = &root_table_header.ctl_entry;
1415 head = list_entry(tmp, struct ctl_table_header, ctl_entry);
1417 if (!use_table(head))
1419 spin_unlock(&sysctl_lock);
1424 header_list = lookup_header_list(root, namespaces);
1425 if (tmp != header_list)
1429 root = list_entry(root->root_list.next,
1430 struct ctl_table_root, root_list);
1431 if (root == &sysctl_table_root)
1433 header_list = lookup_header_list(root, namespaces);
1434 } while (list_empty(header_list));
1435 tmp = header_list->next;
1438 spin_unlock(&sysctl_lock);
1442 struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev)
1444 return __sysctl_head_next(current->nsproxy, prev);
1447 void register_sysctl_root(struct ctl_table_root *root)
1449 spin_lock(&sysctl_lock);
1450 list_add_tail(&root->root_list, &sysctl_table_root.root_list);
1451 spin_unlock(&sysctl_lock);
1454 #ifdef CONFIG_SYSCTL_SYSCALL
1455 int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *oldlenp,
1456 void __user *newval, size_t newlen)
1458 struct ctl_table_header *head;
1459 int error = -ENOTDIR;
1461 if (nlen <= 0 || nlen >= CTL_MAXNAME)
1465 if (!oldlenp || get_user(old_len, oldlenp))
1469 for (head = sysctl_head_next(NULL); head;
1470 head = sysctl_head_next(head)) {
1471 error = parse_table(name, nlen, oldval, oldlenp,
1472 newval, newlen, head->ctl_table);
1473 if (error != -ENOTDIR) {
1474 sysctl_head_finish(head);
1481 asmlinkage long sys_sysctl(struct __sysctl_args __user *args)
1483 struct __sysctl_args tmp;
1486 if (copy_from_user(&tmp, args, sizeof(tmp)))
1489 error = deprecated_sysctl_warning(&tmp);
1494 error = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, tmp.oldlenp,
1495 tmp.newval, tmp.newlen);
1500 #endif /* CONFIG_SYSCTL_SYSCALL */
1503 * sysctl_perm does NOT grant the superuser all rights automatically, because
1504 * some sysctl variables are readonly even to root.
1507 static int test_perm(int mode, int op)
1511 else if (in_egroup_p(0))
1513 if ((mode & op & 0007) == op)
1518 int sysctl_perm(struct ctl_table *table, int op)
1521 error = security_sysctl(table, op);
1524 return test_perm(table->mode, op);
1527 #ifdef CONFIG_SYSCTL_SYSCALL
1528 static int parse_table(int __user *name, int nlen,
1529 void __user *oldval, size_t __user *oldlenp,
1530 void __user *newval, size_t newlen,
1531 struct ctl_table *table)
1537 if (get_user(n, name))
1539 for ( ; table->ctl_name || table->procname; table++) {
1540 if (!table->ctl_name)
1542 if (n == table->ctl_name) {
1545 if (sysctl_perm(table, 001))
1549 table = table->child;
1552 error = do_sysctl_strategy(table, name, nlen,
1561 /* Perform the actual read/write of a sysctl table entry. */
1562 int do_sysctl_strategy (struct ctl_table *table,
1563 int __user *name, int nlen,
1564 void __user *oldval, size_t __user *oldlenp,
1565 void __user *newval, size_t newlen)
1573 if (sysctl_perm(table, op))
1576 if (table->strategy) {
1577 rc = table->strategy(table, name, nlen, oldval, oldlenp,
1585 /* If there is no strategy routine, or if the strategy returns
1586 * zero, proceed with automatic r/w */
1587 if (table->data && table->maxlen) {
1588 rc = sysctl_data(table, name, nlen, oldval, oldlenp,
1595 #endif /* CONFIG_SYSCTL_SYSCALL */
1597 static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table)
1599 for (; table->ctl_name || table->procname; table++) {
1600 table->parent = parent;
1602 sysctl_set_parent(table, table->child);
1606 static __init int sysctl_init(void)
1609 sysctl_set_parent(NULL, root_table);
1610 err = sysctl_check_table(current->nsproxy, root_table);
1614 core_initcall(sysctl_init);
1617 * __register_sysctl_paths - register a sysctl hierarchy
1618 * @root: List of sysctl headers to register on
1619 * @namespaces: Data to compute which lists of sysctl entries are visible
1620 * @path: The path to the directory the sysctl table is in.
1621 * @table: the top-level table structure
1623 * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1624 * array. A completely 0 filled entry terminates the table.
1626 * The members of the &struct ctl_table structure are used as follows:
1628 * ctl_name - This is the numeric sysctl value used by sysctl(2). The number
1629 * must be unique within that level of sysctl
1631 * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not
1632 * enter a sysctl file
1634 * data - a pointer to data for use by proc_handler
1636 * maxlen - the maximum size in bytes of the data
1638 * mode - the file permissions for the /proc/sys file, and for sysctl(2)
1640 * child - a pointer to the child sysctl table if this entry is a directory, or
1643 * proc_handler - the text handler routine (described below)
1645 * strategy - the strategy routine (described below)
1647 * de - for internal use by the sysctl routines
1649 * extra1, extra2 - extra pointers usable by the proc handler routines
1651 * Leaf nodes in the sysctl tree will be represented by a single file
1652 * under /proc; non-leaf nodes will be represented by directories.
1654 * sysctl(2) can automatically manage read and write requests through
1655 * the sysctl table. The data and maxlen fields of the ctl_table
1656 * struct enable minimal validation of the values being written to be
1657 * performed, and the mode field allows minimal authentication.
1659 * More sophisticated management can be enabled by the provision of a
1660 * strategy routine with the table entry. This will be called before
1661 * any automatic read or write of the data is performed.
1663 * The strategy routine may return
1665 * < 0 - Error occurred (error is passed to user process)
1667 * 0 - OK - proceed with automatic read or write.
1669 * > 0 - OK - read or write has been done by the strategy routine, so
1670 * return immediately.
1672 * There must be a proc_handler routine for any terminal nodes
1673 * mirrored under /proc/sys (non-terminals are handled by a built-in
1674 * directory handler). Several default handlers are available to
1675 * cover common cases -
1677 * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(),
1678 * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(),
1679 * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax()
1681 * It is the handler's job to read the input buffer from user memory
1682 * and process it. The handler should return 0 on success.
1684 * This routine returns %NULL on a failure to register, and a pointer
1685 * to the table header on success.
1687 struct ctl_table_header *__register_sysctl_paths(
1688 struct ctl_table_root *root,
1689 struct nsproxy *namespaces,
1690 const struct ctl_path *path, struct ctl_table *table)
1692 struct list_head *header_list;
1693 struct ctl_table_header *header;
1694 struct ctl_table *new, **prevp;
1695 unsigned int n, npath;
1697 /* Count the path components */
1698 for (npath = 0; path[npath].ctl_name || path[npath].procname; ++npath)
1702 * For each path component, allocate a 2-element ctl_table array.
1703 * The first array element will be filled with the sysctl entry
1704 * for this, the second will be the sentinel (ctl_name == 0).
1706 * We allocate everything in one go so that we don't have to
1707 * worry about freeing additional memory in unregister_sysctl_table.
1709 header = kzalloc(sizeof(struct ctl_table_header) +
1710 (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL);
1714 new = (struct ctl_table *) (header + 1);
1716 /* Now connect the dots */
1717 prevp = &header->ctl_table;
1718 for (n = 0; n < npath; ++n, ++path) {
1719 /* Copy the procname */
1720 new->procname = path->procname;
1721 new->ctl_name = path->ctl_name;
1725 prevp = &new->child;
1730 header->ctl_table_arg = table;
1732 INIT_LIST_HEAD(&header->ctl_entry);
1734 header->unregistering = NULL;
1735 header->root = root;
1736 sysctl_set_parent(NULL, header->ctl_table);
1737 if (sysctl_check_table(namespaces, header->ctl_table)) {
1741 spin_lock(&sysctl_lock);
1742 header_list = lookup_header_list(root, namespaces);
1743 list_add_tail(&header->ctl_entry, header_list);
1744 spin_unlock(&sysctl_lock);
1750 * register_sysctl_table_path - register a sysctl table hierarchy
1751 * @path: The path to the directory the sysctl table is in.
1752 * @table: the top-level table structure
1754 * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1755 * array. A completely 0 filled entry terminates the table.
1757 * See __register_sysctl_paths for more details.
1759 struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
1760 struct ctl_table *table)
1762 return __register_sysctl_paths(&sysctl_table_root, current->nsproxy,
1767 * register_sysctl_table - register a sysctl table hierarchy
1768 * @table: the top-level table structure
1770 * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1771 * array. A completely 0 filled entry terminates the table.
1773 * See register_sysctl_paths for more details.
1775 struct ctl_table_header *register_sysctl_table(struct ctl_table *table)
1777 static const struct ctl_path null_path[] = { {} };
1779 return register_sysctl_paths(null_path, table);
1783 * unregister_sysctl_table - unregister a sysctl table hierarchy
1784 * @header: the header returned from register_sysctl_table
1786 * Unregisters the sysctl table and all children. proc entries may not
1787 * actually be removed until they are no longer used by anyone.
1789 void unregister_sysctl_table(struct ctl_table_header * header)
1796 spin_lock(&sysctl_lock);
1797 start_unregistering(header);
1798 spin_unlock(&sysctl_lock);
1802 #else /* !CONFIG_SYSCTL */
1803 struct ctl_table_header *register_sysctl_table(struct ctl_table * table)
1808 struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
1809 struct ctl_table *table)
1814 void unregister_sysctl_table(struct ctl_table_header * table)
1818 #endif /* CONFIG_SYSCTL */
1824 #ifdef CONFIG_PROC_SYSCTL
1826 static int _proc_do_string(void* data, int maxlen, int write,
1827 struct file *filp, void __user *buffer,
1828 size_t *lenp, loff_t *ppos)
1834 if (!data || !maxlen || !*lenp) {
1842 while (len < *lenp) {
1843 if (get_user(c, p++))
1845 if (c == 0 || c == '\n')
1851 if(copy_from_user(data, buffer, len))
1853 ((char *) data)[len] = 0;
1871 if(copy_to_user(buffer, data, len))
1874 if(put_user('\n', ((char __user *) buffer) + len))
1885 * proc_dostring - read a string sysctl
1886 * @table: the sysctl table
1887 * @write: %TRUE if this is a write to the sysctl file
1888 * @filp: the file structure
1889 * @buffer: the user buffer
1890 * @lenp: the size of the user buffer
1891 * @ppos: file position
1893 * Reads/writes a string from/to the user buffer. If the kernel
1894 * buffer provided is not large enough to hold the string, the
1895 * string is truncated. The copied string is %NULL-terminated.
1896 * If the string is being read by the user process, it is copied
1897 * and a newline '\n' is added. It is truncated if the buffer is
1900 * Returns 0 on success.
1902 int proc_dostring(struct ctl_table *table, int write, struct file *filp,
1903 void __user *buffer, size_t *lenp, loff_t *ppos)
1905 return _proc_do_string(table->data, table->maxlen, write, filp,
1906 buffer, lenp, ppos);
1910 static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp,
1912 int write, void *data)
1915 *valp = *negp ? -*lvalp : *lvalp;
1920 *lvalp = (unsigned long)-val;
1923 *lvalp = (unsigned long)val;
1929 static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table,
1930 int write, struct file *filp, void __user *buffer,
1931 size_t *lenp, loff_t *ppos,
1932 int (*conv)(int *negp, unsigned long *lvalp, int *valp,
1933 int write, void *data),
1936 #define TMPBUFLEN 21
1937 int *i, vleft, first=1, neg, val;
1941 char buf[TMPBUFLEN], *p;
1942 char __user *s = buffer;
1944 if (!tbl_data || !table->maxlen || !*lenp ||
1945 (*ppos && !write)) {
1950 i = (int *) tbl_data;
1951 vleft = table->maxlen / sizeof(*i);
1955 conv = do_proc_dointvec_conv;
1957 for (; left && vleft--; i++, first=0) {
1972 if (len > sizeof(buf) - 1)
1973 len = sizeof(buf) - 1;
1974 if (copy_from_user(buf, s, len))
1978 if (*p == '-' && left > 1) {
1982 if (*p < '0' || *p > '9')
1985 lval = simple_strtoul(p, &p, 0);
1988 if ((len < left) && *p && !isspace(*p))
1995 if (conv(&neg, &lval, i, 1, data))
2002 if (conv(&neg, &lval, i, 0, data))
2005 sprintf(p, "%s%lu", neg ? "-" : "", lval);
2009 if(copy_to_user(s, buf, len))
2016 if (!write && !first && left) {
2017 if(put_user('\n', s))
2024 if (get_user(c, s++))
2039 static int do_proc_dointvec(struct ctl_table *table, int write, struct file *filp,
2040 void __user *buffer, size_t *lenp, loff_t *ppos,
2041 int (*conv)(int *negp, unsigned long *lvalp, int *valp,
2042 int write, void *data),
2045 return __do_proc_dointvec(table->data, table, write, filp,
2046 buffer, lenp, ppos, conv, data);
2050 * proc_dointvec - read a vector of integers
2051 * @table: the sysctl table
2052 * @write: %TRUE if this is a write to the sysctl file
2053 * @filp: the file structure
2054 * @buffer: the user buffer
2055 * @lenp: the size of the user buffer
2056 * @ppos: file position
2058 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2059 * values from/to the user buffer, treated as an ASCII string.
2061 * Returns 0 on success.
2063 int proc_dointvec(struct ctl_table *table, int write, struct file *filp,
2064 void __user *buffer, size_t *lenp, loff_t *ppos)
2066 return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
2074 static int do_proc_dointvec_bset_conv(int *negp, unsigned long *lvalp,
2076 int write, void *data)
2078 int op = *(int *)data;
2080 int val = *negp ? -*lvalp : *lvalp;
2082 case OP_SET: *valp = val; break;
2083 case OP_AND: *valp &= val; break;
2084 case OP_OR: *valp |= val; break;
2090 *lvalp = (unsigned long)-val;
2093 *lvalp = (unsigned long)val;
2099 #ifdef CONFIG_SECURITY_CAPABILITIES
2101 * init may raise the set.
2104 int proc_dointvec_bset(struct ctl_table *table, int write, struct file *filp,
2105 void __user *buffer, size_t *lenp, loff_t *ppos)
2109 if (write && !capable(CAP_SYS_MODULE)) {
2113 op = is_global_init(current) ? OP_SET : OP_AND;
2114 return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
2115 do_proc_dointvec_bset_conv,&op);
2117 #endif /* def CONFIG_SECURITY_CAPABILITIES */
2120 * Taint values can only be increased
2122 static int proc_dointvec_taint(struct ctl_table *table, int write, struct file *filp,
2123 void __user *buffer, size_t *lenp, loff_t *ppos)
2127 if (write && !capable(CAP_SYS_ADMIN))
2131 return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
2132 do_proc_dointvec_bset_conv,&op);
2135 struct do_proc_dointvec_minmax_conv_param {
2140 static int do_proc_dointvec_minmax_conv(int *negp, unsigned long *lvalp,
2142 int write, void *data)
2144 struct do_proc_dointvec_minmax_conv_param *param = data;
2146 int val = *negp ? -*lvalp : *lvalp;
2147 if ((param->min && *param->min > val) ||
2148 (param->max && *param->max < val))
2155 *lvalp = (unsigned long)-val;
2158 *lvalp = (unsigned long)val;
2165 * proc_dointvec_minmax - read a vector of integers with min/max values
2166 * @table: the sysctl table
2167 * @write: %TRUE if this is a write to the sysctl file
2168 * @filp: the file structure
2169 * @buffer: the user buffer
2170 * @lenp: the size of the user buffer
2171 * @ppos: file position
2173 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2174 * values from/to the user buffer, treated as an ASCII string.
2176 * This routine will ensure the values are within the range specified by
2177 * table->extra1 (min) and table->extra2 (max).
2179 * Returns 0 on success.
2181 int proc_dointvec_minmax(struct ctl_table *table, int write, struct file *filp,
2182 void __user *buffer, size_t *lenp, loff_t *ppos)
2184 struct do_proc_dointvec_minmax_conv_param param = {
2185 .min = (int *) table->extra1,
2186 .max = (int *) table->extra2,
2188 return do_proc_dointvec(table, write, filp, buffer, lenp, ppos,
2189 do_proc_dointvec_minmax_conv, ¶m);
2192 static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write,
2194 void __user *buffer,
2195 size_t *lenp, loff_t *ppos,
2196 unsigned long convmul,
2197 unsigned long convdiv)
2199 #define TMPBUFLEN 21
2200 unsigned long *i, *min, *max, val;
2201 int vleft, first=1, neg;
2203 char buf[TMPBUFLEN], *p;
2204 char __user *s = buffer;
2206 if (!data || !table->maxlen || !*lenp ||
2207 (*ppos && !write)) {
2212 i = (unsigned long *) data;
2213 min = (unsigned long *) table->extra1;
2214 max = (unsigned long *) table->extra2;
2215 vleft = table->maxlen / sizeof(unsigned long);
2218 for (; left && vleft--; i++, min++, max++, first=0) {
2233 if (len > TMPBUFLEN-1)
2235 if (copy_from_user(buf, s, len))
2239 if (*p == '-' && left > 1) {
2243 if (*p < '0' || *p > '9')
2245 val = simple_strtoul(p, &p, 0) * convmul / convdiv ;
2247 if ((len < left) && *p && !isspace(*p))
2256 if ((min && val < *min) || (max && val > *max))
2263 sprintf(p, "%lu", convdiv * (*i) / convmul);
2267 if(copy_to_user(s, buf, len))
2274 if (!write && !first && left) {
2275 if(put_user('\n', s))
2282 if (get_user(c, s++))
2297 static int do_proc_doulongvec_minmax(struct ctl_table *table, int write,
2299 void __user *buffer,
2300 size_t *lenp, loff_t *ppos,
2301 unsigned long convmul,
2302 unsigned long convdiv)
2304 return __do_proc_doulongvec_minmax(table->data, table, write,
2305 filp, buffer, lenp, ppos, convmul, convdiv);
2309 * proc_doulongvec_minmax - read a vector of long integers with min/max values
2310 * @table: the sysctl table
2311 * @write: %TRUE if this is a write to the sysctl file
2312 * @filp: the file structure
2313 * @buffer: the user buffer
2314 * @lenp: the size of the user buffer
2315 * @ppos: file position
2317 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2318 * values from/to the user buffer, treated as an ASCII string.
2320 * This routine will ensure the values are within the range specified by
2321 * table->extra1 (min) and table->extra2 (max).
2323 * Returns 0 on success.
2325 int proc_doulongvec_minmax(struct ctl_table *table, int write, struct file *filp,
2326 void __user *buffer, size_t *lenp, loff_t *ppos)
2328 return do_proc_doulongvec_minmax(table, write, filp, buffer, lenp, ppos, 1l, 1l);
2332 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
2333 * @table: the sysctl table
2334 * @write: %TRUE if this is a write to the sysctl file
2335 * @filp: the file structure
2336 * @buffer: the user buffer
2337 * @lenp: the size of the user buffer
2338 * @ppos: file position
2340 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2341 * values from/to the user buffer, treated as an ASCII string. The values
2342 * are treated as milliseconds, and converted to jiffies when they are stored.
2344 * This routine will ensure the values are within the range specified by
2345 * table->extra1 (min) and table->extra2 (max).
2347 * Returns 0 on success.
2349 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2351 void __user *buffer,
2352 size_t *lenp, loff_t *ppos)
2354 return do_proc_doulongvec_minmax(table, write, filp, buffer,
2355 lenp, ppos, HZ, 1000l);
2359 static int do_proc_dointvec_jiffies_conv(int *negp, unsigned long *lvalp,
2361 int write, void *data)
2364 if (*lvalp > LONG_MAX / HZ)
2366 *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ);
2372 lval = (unsigned long)-val;
2375 lval = (unsigned long)val;
2382 static int do_proc_dointvec_userhz_jiffies_conv(int *negp, unsigned long *lvalp,
2384 int write, void *data)
2387 if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ)
2389 *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp);
2395 lval = (unsigned long)-val;
2398 lval = (unsigned long)val;
2400 *lvalp = jiffies_to_clock_t(lval);
2405 static int do_proc_dointvec_ms_jiffies_conv(int *negp, unsigned long *lvalp,
2407 int write, void *data)
2410 *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp);
2416 lval = (unsigned long)-val;
2419 lval = (unsigned long)val;
2421 *lvalp = jiffies_to_msecs(lval);
2427 * proc_dointvec_jiffies - read a vector of integers as seconds
2428 * @table: the sysctl table
2429 * @write: %TRUE if this is a write to the sysctl file
2430 * @filp: the file structure
2431 * @buffer: the user buffer
2432 * @lenp: the size of the user buffer
2433 * @ppos: file position
2435 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2436 * values from/to the user buffer, treated as an ASCII string.
2437 * The values read are assumed to be in seconds, and are converted into
2440 * Returns 0 on success.
2442 int proc_dointvec_jiffies(struct ctl_table *table, int write, struct file *filp,
2443 void __user *buffer, size_t *lenp, loff_t *ppos)
2445 return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
2446 do_proc_dointvec_jiffies_conv,NULL);
2450 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
2451 * @table: the sysctl table
2452 * @write: %TRUE if this is a write to the sysctl file
2453 * @filp: the file structure
2454 * @buffer: the user buffer
2455 * @lenp: the size of the user buffer
2456 * @ppos: pointer to the file position
2458 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2459 * values from/to the user buffer, treated as an ASCII string.
2460 * The values read are assumed to be in 1/USER_HZ seconds, and
2461 * are converted into jiffies.
2463 * Returns 0 on success.
2465 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, struct file *filp,
2466 void __user *buffer, size_t *lenp, loff_t *ppos)
2468 return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
2469 do_proc_dointvec_userhz_jiffies_conv,NULL);
2473 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
2474 * @table: the sysctl table
2475 * @write: %TRUE if this is a write to the sysctl file
2476 * @filp: the file structure
2477 * @buffer: the user buffer
2478 * @lenp: the size of the user buffer
2479 * @ppos: file position
2480 * @ppos: the current position in the file
2482 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2483 * values from/to the user buffer, treated as an ASCII string.
2484 * The values read are assumed to be in 1/1000 seconds, and
2485 * are converted into jiffies.
2487 * Returns 0 on success.
2489 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, struct file *filp,
2490 void __user *buffer, size_t *lenp, loff_t *ppos)
2492 return do_proc_dointvec(table, write, filp, buffer, lenp, ppos,
2493 do_proc_dointvec_ms_jiffies_conv, NULL);
2496 static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp,
2497 void __user *buffer, size_t *lenp, loff_t *ppos)
2499 struct pid *new_pid;
2503 tmp = pid_nr_ns(cad_pid, current->nsproxy->pid_ns);
2505 r = __do_proc_dointvec(&tmp, table, write, filp, buffer,
2506 lenp, ppos, NULL, NULL);
2510 new_pid = find_get_pid(tmp);
2514 put_pid(xchg(&cad_pid, new_pid));
2518 #else /* CONFIG_PROC_FS */
2520 int proc_dostring(struct ctl_table *table, int write, struct file *filp,
2521 void __user *buffer, size_t *lenp, loff_t *ppos)
2526 int proc_dointvec(struct ctl_table *table, int write, struct file *filp,
2527 void __user *buffer, size_t *lenp, loff_t *ppos)
2532 int proc_dointvec_bset(struct ctl_table *table, int write, struct file *filp,
2533 void __user *buffer, size_t *lenp, loff_t *ppos)
2538 int proc_dointvec_minmax(struct ctl_table *table, int write, struct file *filp,
2539 void __user *buffer, size_t *lenp, loff_t *ppos)
2544 int proc_dointvec_jiffies(struct ctl_table *table, int write, struct file *filp,
2545 void __user *buffer, size_t *lenp, loff_t *ppos)
2550 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, struct file *filp,
2551 void __user *buffer, size_t *lenp, loff_t *ppos)
2556 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, struct file *filp,
2557 void __user *buffer, size_t *lenp, loff_t *ppos)
2562 int proc_doulongvec_minmax(struct ctl_table *table, int write, struct file *filp,
2563 void __user *buffer, size_t *lenp, loff_t *ppos)
2568 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2570 void __user *buffer,
2571 size_t *lenp, loff_t *ppos)
2577 #endif /* CONFIG_PROC_FS */
2580 #ifdef CONFIG_SYSCTL_SYSCALL
2582 * General sysctl support routines
2585 /* The generic sysctl data routine (used if no strategy routine supplied) */
2586 int sysctl_data(struct ctl_table *table, int __user *name, int nlen,
2587 void __user *oldval, size_t __user *oldlenp,
2588 void __user *newval, size_t newlen)
2592 /* Get out of I don't have a variable */
2593 if (!table->data || !table->maxlen)
2596 if (oldval && oldlenp) {
2597 if (get_user(len, oldlenp))
2600 if (len > table->maxlen)
2601 len = table->maxlen;
2602 if (copy_to_user(oldval, table->data, len))
2604 if (put_user(len, oldlenp))
2609 if (newval && newlen) {
2610 if (newlen > table->maxlen)
2611 newlen = table->maxlen;
2613 if (copy_from_user(table->data, newval, newlen))
2619 /* The generic string strategy routine: */
2620 int sysctl_string(struct ctl_table *table, int __user *name, int nlen,
2621 void __user *oldval, size_t __user *oldlenp,
2622 void __user *newval, size_t newlen)
2624 if (!table->data || !table->maxlen)
2627 if (oldval && oldlenp) {
2629 if (get_user(bufsize, oldlenp))
2632 size_t len = strlen(table->data), copied;
2634 /* This shouldn't trigger for a well-formed sysctl */
2635 if (len > table->maxlen)
2636 len = table->maxlen;
2638 /* Copy up to a max of bufsize-1 bytes of the string */
2639 copied = (len >= bufsize) ? bufsize - 1 : len;
2641 if (copy_to_user(oldval, table->data, copied) ||
2642 put_user(0, (char __user *)(oldval + copied)))
2644 if (put_user(len, oldlenp))
2648 if (newval && newlen) {
2649 size_t len = newlen;
2650 if (len > table->maxlen)
2651 len = table->maxlen;
2652 if(copy_from_user(table->data, newval, len))
2654 if (len == table->maxlen)
2656 ((char *) table->data)[len] = 0;
2662 * This function makes sure that all of the integers in the vector
2663 * are between the minimum and maximum values given in the arrays
2664 * table->extra1 and table->extra2, respectively.
2666 int sysctl_intvec(struct ctl_table *table, int __user *name, int nlen,
2667 void __user *oldval, size_t __user *oldlenp,
2668 void __user *newval, size_t newlen)
2671 if (newval && newlen) {
2672 int __user *vec = (int __user *) newval;
2673 int *min = (int *) table->extra1;
2674 int *max = (int *) table->extra2;
2678 if (newlen % sizeof(int) != 0)
2681 if (!table->extra1 && !table->extra2)
2684 if (newlen > table->maxlen)
2685 newlen = table->maxlen;
2686 length = newlen / sizeof(int);
2688 for (i = 0; i < length; i++) {
2690 if (get_user(value, vec + i))
2692 if (min && value < min[i])
2694 if (max && value > max[i])
2701 /* Strategy function to convert jiffies to seconds */
2702 int sysctl_jiffies(struct ctl_table *table, int __user *name, int nlen,
2703 void __user *oldval, size_t __user *oldlenp,
2704 void __user *newval, size_t newlen)
2706 if (oldval && oldlenp) {
2709 if (get_user(olen, oldlenp))
2714 if (olen < sizeof(int))
2717 val = *(int *)(table->data) / HZ;
2718 if (put_user(val, (int __user *)oldval))
2720 if (put_user(sizeof(int), oldlenp))
2724 if (newval && newlen) {
2726 if (newlen != sizeof(int))
2728 if (get_user(new, (int __user *)newval))
2730 *(int *)(table->data) = new*HZ;
2735 /* Strategy function to convert jiffies to seconds */
2736 int sysctl_ms_jiffies(struct ctl_table *table, int __user *name, int nlen,
2737 void __user *oldval, size_t __user *oldlenp,
2738 void __user *newval, size_t newlen)
2740 if (oldval && oldlenp) {
2743 if (get_user(olen, oldlenp))
2748 if (olen < sizeof(int))
2751 val = jiffies_to_msecs(*(int *)(table->data));
2752 if (put_user(val, (int __user *)oldval))
2754 if (put_user(sizeof(int), oldlenp))
2758 if (newval && newlen) {
2760 if (newlen != sizeof(int))
2762 if (get_user(new, (int __user *)newval))
2764 *(int *)(table->data) = msecs_to_jiffies(new);
2771 #else /* CONFIG_SYSCTL_SYSCALL */
2774 asmlinkage long sys_sysctl(struct __sysctl_args __user *args)
2776 struct __sysctl_args tmp;
2779 if (copy_from_user(&tmp, args, sizeof(tmp)))
2782 error = deprecated_sysctl_warning(&tmp);
2784 /* If no error reading the parameters then just -ENOSYS ... */
2791 int sysctl_data(struct ctl_table *table, int __user *name, int nlen,
2792 void __user *oldval, size_t __user *oldlenp,
2793 void __user *newval, size_t newlen)
2798 int sysctl_string(struct ctl_table *table, int __user *name, int nlen,
2799 void __user *oldval, size_t __user *oldlenp,
2800 void __user *newval, size_t newlen)
2805 int sysctl_intvec(struct ctl_table *table, int __user *name, int nlen,
2806 void __user *oldval, size_t __user *oldlenp,
2807 void __user *newval, size_t newlen)
2812 int sysctl_jiffies(struct ctl_table *table, int __user *name, int nlen,
2813 void __user *oldval, size_t __user *oldlenp,
2814 void __user *newval, size_t newlen)
2819 int sysctl_ms_jiffies(struct ctl_table *table, int __user *name, int nlen,
2820 void __user *oldval, size_t __user *oldlenp,
2821 void __user *newval, size_t newlen)
2826 #endif /* CONFIG_SYSCTL_SYSCALL */
2828 static int deprecated_sysctl_warning(struct __sysctl_args *args)
2830 static int msg_count;
2831 int name[CTL_MAXNAME];
2834 /* Check args->nlen. */
2835 if (args->nlen < 0 || args->nlen > CTL_MAXNAME)
2838 /* Read in the sysctl name for better debug message logging */
2839 for (i = 0; i < args->nlen; i++)
2840 if (get_user(name[i], args->name + i))
2843 /* Ignore accesses to kernel.version */
2844 if ((args->nlen == 2) && (name[0] == CTL_KERN) && (name[1] == KERN_VERSION))
2847 if (msg_count < 5) {
2850 "warning: process `%s' used the deprecated sysctl "
2851 "system call with ", current->comm);
2852 for (i = 0; i < args->nlen; i++)
2853 printk("%d.", name[i]);
2860 * No sense putting this after each symbol definition, twice,
2861 * exception granted :-)
2863 EXPORT_SYMBOL(proc_dointvec);
2864 EXPORT_SYMBOL(proc_dointvec_jiffies);
2865 EXPORT_SYMBOL(proc_dointvec_minmax);
2866 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
2867 EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
2868 EXPORT_SYMBOL(proc_dostring);
2869 EXPORT_SYMBOL(proc_doulongvec_minmax);
2870 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
2871 EXPORT_SYMBOL(register_sysctl_table);
2872 EXPORT_SYMBOL(register_sysctl_paths);
2873 EXPORT_SYMBOL(sysctl_intvec);
2874 EXPORT_SYMBOL(sysctl_jiffies);
2875 EXPORT_SYMBOL(sysctl_ms_jiffies);
2876 EXPORT_SYMBOL(sysctl_string);
2877 EXPORT_SYMBOL(sysctl_data);
2878 EXPORT_SYMBOL(unregister_sysctl_table);