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/capability.h>
28 #include <linux/ctype.h>
29 #include <linux/utsname.h>
30 #include <linux/capability.h>
31 #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>
49 #include <asm/uaccess.h>
50 #include <asm/processor.h>
52 extern int proc_nr_files(ctl_table
*table
, int write
, struct file
*filp
,
53 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
);
59 #if defined(CONFIG_SYSCTL)
61 /* External variables not in a header file. */
63 extern int sysctl_overcommit_memory
;
64 extern int sysctl_overcommit_ratio
;
65 extern int sysctl_panic_on_oom
;
66 extern int max_threads
;
67 extern int sysrq_enabled
;
68 extern int core_uses_pid
;
69 extern int suid_dumpable
;
70 extern char core_pattern
[];
73 extern int min_free_kbytes
;
74 extern int printk_ratelimit_jiffies
;
75 extern int printk_ratelimit_burst
;
76 extern int pid_max_min
, pid_max_max
;
77 extern int sysctl_drop_caches
;
78 extern int percpu_pagelist_fraction
;
79 extern int compat_log
;
81 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
82 static int maxolduid
= 65535;
84 static int min_percpu_pagelist_fract
= 8;
86 static int ngroups_max
= NGROUPS_MAX
;
89 extern char modprobe_path
[];
91 #ifdef CONFIG_CHR_DEV_SG
92 extern int sg_big_buff
;
95 static int proc_do_ipc_string(ctl_table
*table
, int write
, struct file
*filp
,
96 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
);
100 extern char reboot_command
[];
101 extern int stop_a_enabled
;
102 extern int scons_pwroff
;
106 extern int pwrsw_enabled
;
107 extern int unaligned_enabled
;
111 #ifdef CONFIG_MATHEMU
112 extern int sysctl_ieee_emulation_warnings
;
114 extern int sysctl_userprocess_debug
;
115 extern int spin_retry
;
118 extern int sysctl_hz_timer
;
120 #ifdef CONFIG_BSD_PROCESS_ACCT
121 extern int acct_parm
[];
125 extern int no_unaligned_warning
;
128 #ifdef CONFIG_RT_MUTEXES
129 extern int max_lock_depth
;
132 #ifdef CONFIG_SYSCTL_SYSCALL
133 static int parse_table(int __user
*, int, void __user
*, size_t __user
*,
134 void __user
*, size_t, ctl_table
*, void **);
137 static int proc_do_uts_string(ctl_table
*table
, int write
, struct file
*filp
,
138 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
);
140 static ctl_table root_table
[];
141 static struct ctl_table_header root_table_header
=
142 { root_table
, LIST_HEAD_INIT(root_table_header
.ctl_entry
) };
144 static ctl_table kern_table
[];
145 static ctl_table vm_table
[];
146 static ctl_table fs_table
[];
147 static ctl_table debug_table
[];
148 static ctl_table dev_table
[];
149 extern ctl_table random_table
[];
150 #ifdef CONFIG_UNIX98_PTYS
151 extern ctl_table pty_table
[];
153 #ifdef CONFIG_INOTIFY_USER
154 extern ctl_table inotify_table
[];
157 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
158 int sysctl_legacy_va_layout
;
161 /* /proc declarations: */
163 #ifdef CONFIG_PROC_SYSCTL
165 static ssize_t
proc_readsys(struct file
*, char __user
*, size_t, loff_t
*);
166 static ssize_t
proc_writesys(struct file
*, const char __user
*, size_t, loff_t
*);
167 static int proc_opensys(struct inode
*, struct file
*);
169 struct file_operations proc_sys_file_operations
= {
170 .open
= proc_opensys
,
171 .read
= proc_readsys
,
172 .write
= proc_writesys
,
175 extern struct proc_dir_entry
*proc_sys_root
;
177 static void register_proc_table(ctl_table
*, struct proc_dir_entry
*, void *);
178 static void unregister_proc_table(ctl_table
*, struct proc_dir_entry
*);
181 /* The default sysctl tables: */
183 static ctl_table root_table
[] = {
185 .ctl_name
= CTL_KERN
,
186 .procname
= "kernel",
211 .ctl_name
= CTL_DEBUG
,
214 .child
= debug_table
,
226 static ctl_table kern_table
[] = {
227 #ifndef CONFIG_UTS_NS
229 .ctl_name
= KERN_OSTYPE
,
230 .procname
= "ostype",
231 .data
= init_uts_ns
.name
.sysname
,
232 .maxlen
= sizeof(init_uts_ns
.name
.sysname
),
234 .proc_handler
= &proc_do_uts_string
,
235 .strategy
= &sysctl_string
,
238 .ctl_name
= KERN_OSRELEASE
,
239 .procname
= "osrelease",
240 .data
= init_uts_ns
.name
.release
,
241 .maxlen
= sizeof(init_uts_ns
.name
.release
),
243 .proc_handler
= &proc_do_uts_string
,
244 .strategy
= &sysctl_string
,
247 .ctl_name
= KERN_VERSION
,
248 .procname
= "version",
249 .data
= init_uts_ns
.name
.version
,
250 .maxlen
= sizeof(init_uts_ns
.name
.version
),
252 .proc_handler
= &proc_do_uts_string
,
253 .strategy
= &sysctl_string
,
256 .ctl_name
= KERN_NODENAME
,
257 .procname
= "hostname",
258 .data
= init_uts_ns
.name
.nodename
,
259 .maxlen
= sizeof(init_uts_ns
.name
.nodename
),
261 .proc_handler
= &proc_do_uts_string
,
262 .strategy
= &sysctl_string
,
265 .ctl_name
= KERN_DOMAINNAME
,
266 .procname
= "domainname",
267 .data
= init_uts_ns
.name
.domainname
,
268 .maxlen
= sizeof(init_uts_ns
.name
.domainname
),
270 .proc_handler
= &proc_do_uts_string
,
271 .strategy
= &sysctl_string
,
273 #else /* !CONFIG_UTS_NS */
275 .ctl_name
= KERN_OSTYPE
,
276 .procname
= "ostype",
278 /* could maybe use __NEW_UTS_LEN here? */
279 .maxlen
= FIELD_SIZEOF(struct new_utsname
, sysname
),
281 .proc_handler
= &proc_do_uts_string
,
282 .strategy
= &sysctl_string
,
285 .ctl_name
= KERN_OSRELEASE
,
286 .procname
= "osrelease",
288 .maxlen
= FIELD_SIZEOF(struct new_utsname
, release
),
290 .proc_handler
= &proc_do_uts_string
,
291 .strategy
= &sysctl_string
,
294 .ctl_name
= KERN_VERSION
,
295 .procname
= "version",
297 .maxlen
= FIELD_SIZEOF(struct new_utsname
, version
),
299 .proc_handler
= &proc_do_uts_string
,
300 .strategy
= &sysctl_string
,
303 .ctl_name
= KERN_NODENAME
,
304 .procname
= "hostname",
306 .maxlen
= FIELD_SIZEOF(struct new_utsname
, nodename
),
308 .proc_handler
= &proc_do_uts_string
,
309 .strategy
= &sysctl_string
,
312 .ctl_name
= KERN_DOMAINNAME
,
313 .procname
= "domainname",
315 .maxlen
= FIELD_SIZEOF(struct new_utsname
, domainname
),
317 .proc_handler
= &proc_do_uts_string
,
318 .strategy
= &sysctl_string
,
320 #endif /* !CONFIG_UTS_NS */
322 .ctl_name
= KERN_PANIC
,
324 .data
= &panic_timeout
,
325 .maxlen
= sizeof(int),
327 .proc_handler
= &proc_dointvec
,
330 .ctl_name
= KERN_CORE_USES_PID
,
331 .procname
= "core_uses_pid",
332 .data
= &core_uses_pid
,
333 .maxlen
= sizeof(int),
335 .proc_handler
= &proc_dointvec
,
338 .ctl_name
= KERN_CORE_PATTERN
,
339 .procname
= "core_pattern",
340 .data
= core_pattern
,
343 .proc_handler
= &proc_dostring
,
344 .strategy
= &sysctl_string
,
347 .ctl_name
= KERN_TAINTED
,
348 .procname
= "tainted",
350 .maxlen
= sizeof(int),
352 .proc_handler
= &proc_dointvec
,
355 .ctl_name
= KERN_CAP_BSET
,
356 .procname
= "cap-bound",
358 .maxlen
= sizeof(kernel_cap_t
),
360 .proc_handler
= &proc_dointvec_bset
,
362 #ifdef CONFIG_BLK_DEV_INITRD
364 .ctl_name
= KERN_REALROOTDEV
,
365 .procname
= "real-root-dev",
366 .data
= &real_root_dev
,
367 .maxlen
= sizeof(int),
369 .proc_handler
= &proc_dointvec
,
374 .ctl_name
= KERN_SPARC_REBOOT
,
375 .procname
= "reboot-cmd",
376 .data
= reboot_command
,
379 .proc_handler
= &proc_dostring
,
380 .strategy
= &sysctl_string
,
383 .ctl_name
= KERN_SPARC_STOP_A
,
384 .procname
= "stop-a",
385 .data
= &stop_a_enabled
,
386 .maxlen
= sizeof (int),
388 .proc_handler
= &proc_dointvec
,
391 .ctl_name
= KERN_SPARC_SCONS_PWROFF
,
392 .procname
= "scons-poweroff",
393 .data
= &scons_pwroff
,
394 .maxlen
= sizeof (int),
396 .proc_handler
= &proc_dointvec
,
401 .ctl_name
= KERN_HPPA_PWRSW
,
402 .procname
= "soft-power",
403 .data
= &pwrsw_enabled
,
404 .maxlen
= sizeof (int),
406 .proc_handler
= &proc_dointvec
,
409 .ctl_name
= KERN_HPPA_UNALIGNED
,
410 .procname
= "unaligned-trap",
411 .data
= &unaligned_enabled
,
412 .maxlen
= sizeof (int),
414 .proc_handler
= &proc_dointvec
,
418 .ctl_name
= KERN_CTLALTDEL
,
419 .procname
= "ctrl-alt-del",
421 .maxlen
= sizeof(int),
423 .proc_handler
= &proc_dointvec
,
426 .ctl_name
= KERN_PRINTK
,
427 .procname
= "printk",
428 .data
= &console_loglevel
,
429 .maxlen
= 4*sizeof(int),
431 .proc_handler
= &proc_dointvec
,
435 .ctl_name
= KERN_MODPROBE
,
436 .procname
= "modprobe",
437 .data
= &modprobe_path
,
438 .maxlen
= KMOD_PATH_LEN
,
440 .proc_handler
= &proc_dostring
,
441 .strategy
= &sysctl_string
,
444 #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
446 .ctl_name
= KERN_HOTPLUG
,
447 .procname
= "hotplug",
448 .data
= &uevent_helper
,
449 .maxlen
= UEVENT_HELPER_PATH_LEN
,
451 .proc_handler
= &proc_dostring
,
452 .strategy
= &sysctl_string
,
455 #ifdef CONFIG_CHR_DEV_SG
457 .ctl_name
= KERN_SG_BIG_BUFF
,
458 .procname
= "sg-big-buff",
459 .data
= &sg_big_buff
,
460 .maxlen
= sizeof (int),
462 .proc_handler
= &proc_dointvec
,
465 #ifdef CONFIG_BSD_PROCESS_ACCT
467 .ctl_name
= KERN_ACCT
,
470 .maxlen
= 3*sizeof(int),
472 .proc_handler
= &proc_dointvec
,
475 #ifdef CONFIG_SYSVIPC
477 .ctl_name
= KERN_SHMMAX
,
478 .procname
= "shmmax",
480 .maxlen
= sizeof (size_t),
482 .proc_handler
= &proc_do_ipc_string
,
485 .ctl_name
= KERN_SHMALL
,
486 .procname
= "shmall",
488 .maxlen
= sizeof (size_t),
490 .proc_handler
= &proc_do_ipc_string
,
493 .ctl_name
= KERN_SHMMNI
,
494 .procname
= "shmmni",
496 .maxlen
= sizeof (int),
498 .proc_handler
= &proc_do_ipc_string
,
501 .ctl_name
= KERN_MSGMAX
,
502 .procname
= "msgmax",
504 .maxlen
= sizeof (int),
506 .proc_handler
= &proc_do_ipc_string
,
509 .ctl_name
= KERN_MSGMNI
,
510 .procname
= "msgmni",
512 .maxlen
= sizeof (int),
514 .proc_handler
= &proc_do_ipc_string
,
517 .ctl_name
= KERN_MSGMNB
,
518 .procname
= "msgmnb",
520 .maxlen
= sizeof (int),
522 .proc_handler
= &proc_do_ipc_string
,
525 .ctl_name
= KERN_SEM
,
528 .maxlen
= 4*sizeof (int),
530 .proc_handler
= &proc_do_ipc_string
,
533 #ifdef CONFIG_MAGIC_SYSRQ
535 .ctl_name
= KERN_SYSRQ
,
537 .data
= &sysrq_enabled
,
538 .maxlen
= sizeof (int),
540 .proc_handler
= &proc_dointvec
,
544 .ctl_name
= KERN_CADPID
,
545 .procname
= "cad_pid",
547 .maxlen
= sizeof (int),
549 .proc_handler
= &proc_dointvec
,
552 .ctl_name
= KERN_MAX_THREADS
,
553 .procname
= "threads-max",
554 .data
= &max_threads
,
555 .maxlen
= sizeof(int),
557 .proc_handler
= &proc_dointvec
,
560 .ctl_name
= KERN_RANDOM
,
561 .procname
= "random",
563 .child
= random_table
,
565 #ifdef CONFIG_UNIX98_PTYS
567 .ctl_name
= KERN_PTY
,
574 .ctl_name
= KERN_OVERFLOWUID
,
575 .procname
= "overflowuid",
576 .data
= &overflowuid
,
577 .maxlen
= sizeof(int),
579 .proc_handler
= &proc_dointvec_minmax
,
580 .strategy
= &sysctl_intvec
,
581 .extra1
= &minolduid
,
582 .extra2
= &maxolduid
,
585 .ctl_name
= KERN_OVERFLOWGID
,
586 .procname
= "overflowgid",
587 .data
= &overflowgid
,
588 .maxlen
= sizeof(int),
590 .proc_handler
= &proc_dointvec_minmax
,
591 .strategy
= &sysctl_intvec
,
592 .extra1
= &minolduid
,
593 .extra2
= &maxolduid
,
596 #ifdef CONFIG_MATHEMU
598 .ctl_name
= KERN_IEEE_EMULATION_WARNINGS
,
599 .procname
= "ieee_emulation_warnings",
600 .data
= &sysctl_ieee_emulation_warnings
,
601 .maxlen
= sizeof(int),
603 .proc_handler
= &proc_dointvec
,
606 #ifdef CONFIG_NO_IDLE_HZ
608 .ctl_name
= KERN_HZ_TIMER
,
609 .procname
= "hz_timer",
610 .data
= &sysctl_hz_timer
,
611 .maxlen
= sizeof(int),
613 .proc_handler
= &proc_dointvec
,
617 .ctl_name
= KERN_S390_USER_DEBUG_LOGGING
,
618 .procname
= "userprocess_debug",
619 .data
= &sysctl_userprocess_debug
,
620 .maxlen
= sizeof(int),
622 .proc_handler
= &proc_dointvec
,
626 .ctl_name
= KERN_PIDMAX
,
627 .procname
= "pid_max",
629 .maxlen
= sizeof (int),
631 .proc_handler
= &proc_dointvec_minmax
,
632 .strategy
= sysctl_intvec
,
633 .extra1
= &pid_max_min
,
634 .extra2
= &pid_max_max
,
637 .ctl_name
= KERN_PANIC_ON_OOPS
,
638 .procname
= "panic_on_oops",
639 .data
= &panic_on_oops
,
640 .maxlen
= sizeof(int),
642 .proc_handler
= &proc_dointvec
,
645 .ctl_name
= KERN_PRINTK_RATELIMIT
,
646 .procname
= "printk_ratelimit",
647 .data
= &printk_ratelimit_jiffies
,
648 .maxlen
= sizeof(int),
650 .proc_handler
= &proc_dointvec_jiffies
,
651 .strategy
= &sysctl_jiffies
,
654 .ctl_name
= KERN_PRINTK_RATELIMIT_BURST
,
655 .procname
= "printk_ratelimit_burst",
656 .data
= &printk_ratelimit_burst
,
657 .maxlen
= sizeof(int),
659 .proc_handler
= &proc_dointvec
,
662 .ctl_name
= KERN_NGROUPS_MAX
,
663 .procname
= "ngroups_max",
664 .data
= &ngroups_max
,
665 .maxlen
= sizeof (int),
667 .proc_handler
= &proc_dointvec
,
669 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
671 .ctl_name
= KERN_UNKNOWN_NMI_PANIC
,
672 .procname
= "unknown_nmi_panic",
673 .data
= &unknown_nmi_panic
,
674 .maxlen
= sizeof (int),
676 .proc_handler
= &proc_dointvec
,
679 .ctl_name
= KERN_NMI_WATCHDOG
,
680 .procname
= "nmi_watchdog",
681 .data
= &nmi_watchdog_enabled
,
682 .maxlen
= sizeof (int),
684 .proc_handler
= &proc_nmi_enabled
,
687 #if defined(CONFIG_X86)
689 .ctl_name
= KERN_PANIC_ON_NMI
,
690 .procname
= "panic_on_unrecovered_nmi",
691 .data
= &panic_on_unrecovered_nmi
,
692 .maxlen
= sizeof(int),
694 .proc_handler
= &proc_dointvec
,
697 .ctl_name
= KERN_BOOTLOADER_TYPE
,
698 .procname
= "bootloader_type",
699 .data
= &bootloader_type
,
700 .maxlen
= sizeof (int),
702 .proc_handler
= &proc_dointvec
,
705 #if defined(CONFIG_MMU)
707 .ctl_name
= KERN_RANDOMIZE
,
708 .procname
= "randomize_va_space",
709 .data
= &randomize_va_space
,
710 .maxlen
= sizeof(int),
712 .proc_handler
= &proc_dointvec
,
715 #if defined(CONFIG_S390) && defined(CONFIG_SMP)
717 .ctl_name
= KERN_SPIN_RETRY
,
718 .procname
= "spin_retry",
720 .maxlen
= sizeof (int),
722 .proc_handler
= &proc_dointvec
,
725 #ifdef CONFIG_ACPI_SLEEP
727 .ctl_name
= KERN_ACPI_VIDEO_FLAGS
,
728 .procname
= "acpi_video_flags",
729 .data
= &acpi_video_flags
,
730 .maxlen
= sizeof (unsigned long),
732 .proc_handler
= &proc_doulongvec_minmax
,
737 .ctl_name
= KERN_IA64_UNALIGNED
,
738 .procname
= "ignore-unaligned-usertrap",
739 .data
= &no_unaligned_warning
,
740 .maxlen
= sizeof (int),
742 .proc_handler
= &proc_dointvec
,
747 .ctl_name
= KERN_COMPAT_LOG
,
748 .procname
= "compat-log",
750 .maxlen
= sizeof (int),
752 .proc_handler
= &proc_dointvec
,
755 #ifdef CONFIG_RT_MUTEXES
757 .ctl_name
= KERN_MAX_LOCK_DEPTH
,
758 .procname
= "max_lock_depth",
759 .data
= &max_lock_depth
,
760 .maxlen
= sizeof(int),
762 .proc_handler
= &proc_dointvec
,
769 /* Constants for minimum and maximum testing in vm_table.
770 We use these as one-element integer vectors. */
772 static int one_hundred
= 100;
775 static ctl_table vm_table
[] = {
777 .ctl_name
= VM_OVERCOMMIT_MEMORY
,
778 .procname
= "overcommit_memory",
779 .data
= &sysctl_overcommit_memory
,
780 .maxlen
= sizeof(sysctl_overcommit_memory
),
782 .proc_handler
= &proc_dointvec
,
785 .ctl_name
= VM_PANIC_ON_OOM
,
786 .procname
= "panic_on_oom",
787 .data
= &sysctl_panic_on_oom
,
788 .maxlen
= sizeof(sysctl_panic_on_oom
),
790 .proc_handler
= &proc_dointvec
,
793 .ctl_name
= VM_OVERCOMMIT_RATIO
,
794 .procname
= "overcommit_ratio",
795 .data
= &sysctl_overcommit_ratio
,
796 .maxlen
= sizeof(sysctl_overcommit_ratio
),
798 .proc_handler
= &proc_dointvec
,
801 .ctl_name
= VM_PAGE_CLUSTER
,
802 .procname
= "page-cluster",
803 .data
= &page_cluster
,
804 .maxlen
= sizeof(int),
806 .proc_handler
= &proc_dointvec
,
809 .ctl_name
= VM_DIRTY_BACKGROUND
,
810 .procname
= "dirty_background_ratio",
811 .data
= &dirty_background_ratio
,
812 .maxlen
= sizeof(dirty_background_ratio
),
814 .proc_handler
= &proc_dointvec_minmax
,
815 .strategy
= &sysctl_intvec
,
817 .extra2
= &one_hundred
,
820 .ctl_name
= VM_DIRTY_RATIO
,
821 .procname
= "dirty_ratio",
822 .data
= &vm_dirty_ratio
,
823 .maxlen
= sizeof(vm_dirty_ratio
),
825 .proc_handler
= &proc_dointvec_minmax
,
826 .strategy
= &sysctl_intvec
,
828 .extra2
= &one_hundred
,
831 .ctl_name
= VM_DIRTY_WB_CS
,
832 .procname
= "dirty_writeback_centisecs",
833 .data
= &dirty_writeback_interval
,
834 .maxlen
= sizeof(dirty_writeback_interval
),
836 .proc_handler
= &dirty_writeback_centisecs_handler
,
839 .ctl_name
= VM_DIRTY_EXPIRE_CS
,
840 .procname
= "dirty_expire_centisecs",
841 .data
= &dirty_expire_interval
,
842 .maxlen
= sizeof(dirty_expire_interval
),
844 .proc_handler
= &proc_dointvec_userhz_jiffies
,
847 .ctl_name
= VM_NR_PDFLUSH_THREADS
,
848 .procname
= "nr_pdflush_threads",
849 .data
= &nr_pdflush_threads
,
850 .maxlen
= sizeof nr_pdflush_threads
,
851 .mode
= 0444 /* read-only*/,
852 .proc_handler
= &proc_dointvec
,
855 .ctl_name
= VM_SWAPPINESS
,
856 .procname
= "swappiness",
857 .data
= &vm_swappiness
,
858 .maxlen
= sizeof(vm_swappiness
),
860 .proc_handler
= &proc_dointvec_minmax
,
861 .strategy
= &sysctl_intvec
,
863 .extra2
= &one_hundred
,
865 #ifdef CONFIG_HUGETLB_PAGE
867 .ctl_name
= VM_HUGETLB_PAGES
,
868 .procname
= "nr_hugepages",
869 .data
= &max_huge_pages
,
870 .maxlen
= sizeof(unsigned long),
872 .proc_handler
= &hugetlb_sysctl_handler
,
873 .extra1
= (void *)&hugetlb_zero
,
874 .extra2
= (void *)&hugetlb_infinity
,
877 .ctl_name
= VM_HUGETLB_GROUP
,
878 .procname
= "hugetlb_shm_group",
879 .data
= &sysctl_hugetlb_shm_group
,
880 .maxlen
= sizeof(gid_t
),
882 .proc_handler
= &proc_dointvec
,
886 .ctl_name
= VM_LOWMEM_RESERVE_RATIO
,
887 .procname
= "lowmem_reserve_ratio",
888 .data
= &sysctl_lowmem_reserve_ratio
,
889 .maxlen
= sizeof(sysctl_lowmem_reserve_ratio
),
891 .proc_handler
= &lowmem_reserve_ratio_sysctl_handler
,
892 .strategy
= &sysctl_intvec
,
895 .ctl_name
= VM_DROP_PAGECACHE
,
896 .procname
= "drop_caches",
897 .data
= &sysctl_drop_caches
,
898 .maxlen
= sizeof(int),
900 .proc_handler
= drop_caches_sysctl_handler
,
901 .strategy
= &sysctl_intvec
,
904 .ctl_name
= VM_MIN_FREE_KBYTES
,
905 .procname
= "min_free_kbytes",
906 .data
= &min_free_kbytes
,
907 .maxlen
= sizeof(min_free_kbytes
),
909 .proc_handler
= &min_free_kbytes_sysctl_handler
,
910 .strategy
= &sysctl_intvec
,
914 .ctl_name
= VM_PERCPU_PAGELIST_FRACTION
,
915 .procname
= "percpu_pagelist_fraction",
916 .data
= &percpu_pagelist_fraction
,
917 .maxlen
= sizeof(percpu_pagelist_fraction
),
919 .proc_handler
= &percpu_pagelist_fraction_sysctl_handler
,
920 .strategy
= &sysctl_intvec
,
921 .extra1
= &min_percpu_pagelist_fract
,
925 .ctl_name
= VM_MAX_MAP_COUNT
,
926 .procname
= "max_map_count",
927 .data
= &sysctl_max_map_count
,
928 .maxlen
= sizeof(sysctl_max_map_count
),
930 .proc_handler
= &proc_dointvec
934 .ctl_name
= VM_LAPTOP_MODE
,
935 .procname
= "laptop_mode",
936 .data
= &laptop_mode
,
937 .maxlen
= sizeof(laptop_mode
),
939 .proc_handler
= &proc_dointvec_jiffies
,
940 .strategy
= &sysctl_jiffies
,
943 .ctl_name
= VM_BLOCK_DUMP
,
944 .procname
= "block_dump",
946 .maxlen
= sizeof(block_dump
),
948 .proc_handler
= &proc_dointvec
,
949 .strategy
= &sysctl_intvec
,
953 .ctl_name
= VM_VFS_CACHE_PRESSURE
,
954 .procname
= "vfs_cache_pressure",
955 .data
= &sysctl_vfs_cache_pressure
,
956 .maxlen
= sizeof(sysctl_vfs_cache_pressure
),
958 .proc_handler
= &proc_dointvec
,
959 .strategy
= &sysctl_intvec
,
962 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
964 .ctl_name
= VM_LEGACY_VA_LAYOUT
,
965 .procname
= "legacy_va_layout",
966 .data
= &sysctl_legacy_va_layout
,
967 .maxlen
= sizeof(sysctl_legacy_va_layout
),
969 .proc_handler
= &proc_dointvec
,
970 .strategy
= &sysctl_intvec
,
976 .ctl_name
= VM_SWAP_TOKEN_TIMEOUT
,
977 .procname
= "swap_token_timeout",
978 .data
= &swap_token_default_timeout
,
979 .maxlen
= sizeof(swap_token_default_timeout
),
981 .proc_handler
= &proc_dointvec_jiffies
,
982 .strategy
= &sysctl_jiffies
,
987 .ctl_name
= VM_ZONE_RECLAIM_MODE
,
988 .procname
= "zone_reclaim_mode",
989 .data
= &zone_reclaim_mode
,
990 .maxlen
= sizeof(zone_reclaim_mode
),
992 .proc_handler
= &proc_dointvec
,
993 .strategy
= &sysctl_intvec
,
997 .ctl_name
= VM_MIN_UNMAPPED
,
998 .procname
= "min_unmapped_ratio",
999 .data
= &sysctl_min_unmapped_ratio
,
1000 .maxlen
= sizeof(sysctl_min_unmapped_ratio
),
1002 .proc_handler
= &sysctl_min_unmapped_ratio_sysctl_handler
,
1003 .strategy
= &sysctl_intvec
,
1005 .extra2
= &one_hundred
,
1008 .ctl_name
= VM_MIN_SLAB
,
1009 .procname
= "min_slab_ratio",
1010 .data
= &sysctl_min_slab_ratio
,
1011 .maxlen
= sizeof(sysctl_min_slab_ratio
),
1013 .proc_handler
= &sysctl_min_slab_ratio_sysctl_handler
,
1014 .strategy
= &sysctl_intvec
,
1016 .extra2
= &one_hundred
,
1019 #ifdef CONFIG_X86_32
1021 .ctl_name
= VM_VDSO_ENABLED
,
1022 .procname
= "vdso_enabled",
1023 .data
= &vdso_enabled
,
1024 .maxlen
= sizeof(vdso_enabled
),
1026 .proc_handler
= &proc_dointvec
,
1027 .strategy
= &sysctl_intvec
,
1034 static ctl_table fs_table
[] = {
1036 .ctl_name
= FS_NRINODE
,
1037 .procname
= "inode-nr",
1038 .data
= &inodes_stat
,
1039 .maxlen
= 2*sizeof(int),
1041 .proc_handler
= &proc_dointvec
,
1044 .ctl_name
= FS_STATINODE
,
1045 .procname
= "inode-state",
1046 .data
= &inodes_stat
,
1047 .maxlen
= 7*sizeof(int),
1049 .proc_handler
= &proc_dointvec
,
1052 .ctl_name
= FS_NRFILE
,
1053 .procname
= "file-nr",
1054 .data
= &files_stat
,
1055 .maxlen
= 3*sizeof(int),
1057 .proc_handler
= &proc_nr_files
,
1060 .ctl_name
= FS_MAXFILE
,
1061 .procname
= "file-max",
1062 .data
= &files_stat
.max_files
,
1063 .maxlen
= sizeof(int),
1065 .proc_handler
= &proc_dointvec
,
1068 .ctl_name
= FS_DENTRY
,
1069 .procname
= "dentry-state",
1070 .data
= &dentry_stat
,
1071 .maxlen
= 6*sizeof(int),
1073 .proc_handler
= &proc_dointvec
,
1076 .ctl_name
= FS_OVERFLOWUID
,
1077 .procname
= "overflowuid",
1078 .data
= &fs_overflowuid
,
1079 .maxlen
= sizeof(int),
1081 .proc_handler
= &proc_dointvec_minmax
,
1082 .strategy
= &sysctl_intvec
,
1083 .extra1
= &minolduid
,
1084 .extra2
= &maxolduid
,
1087 .ctl_name
= FS_OVERFLOWGID
,
1088 .procname
= "overflowgid",
1089 .data
= &fs_overflowgid
,
1090 .maxlen
= sizeof(int),
1092 .proc_handler
= &proc_dointvec_minmax
,
1093 .strategy
= &sysctl_intvec
,
1094 .extra1
= &minolduid
,
1095 .extra2
= &maxolduid
,
1098 .ctl_name
= FS_LEASES
,
1099 .procname
= "leases-enable",
1100 .data
= &leases_enable
,
1101 .maxlen
= sizeof(int),
1103 .proc_handler
= &proc_dointvec
,
1105 #ifdef CONFIG_DNOTIFY
1107 .ctl_name
= FS_DIR_NOTIFY
,
1108 .procname
= "dir-notify-enable",
1109 .data
= &dir_notify_enable
,
1110 .maxlen
= sizeof(int),
1112 .proc_handler
= &proc_dointvec
,
1117 .ctl_name
= FS_LEASE_TIME
,
1118 .procname
= "lease-break-time",
1119 .data
= &lease_break_time
,
1120 .maxlen
= sizeof(int),
1122 .proc_handler
= &proc_dointvec
,
1125 .ctl_name
= FS_AIO_NR
,
1126 .procname
= "aio-nr",
1128 .maxlen
= sizeof(aio_nr
),
1130 .proc_handler
= &proc_doulongvec_minmax
,
1133 .ctl_name
= FS_AIO_MAX_NR
,
1134 .procname
= "aio-max-nr",
1135 .data
= &aio_max_nr
,
1136 .maxlen
= sizeof(aio_max_nr
),
1138 .proc_handler
= &proc_doulongvec_minmax
,
1140 #ifdef CONFIG_INOTIFY_USER
1142 .ctl_name
= FS_INOTIFY
,
1143 .procname
= "inotify",
1145 .child
= inotify_table
,
1150 .ctl_name
= KERN_SETUID_DUMPABLE
,
1151 .procname
= "suid_dumpable",
1152 .data
= &suid_dumpable
,
1153 .maxlen
= sizeof(int),
1155 .proc_handler
= &proc_dointvec
,
1160 static ctl_table debug_table
[] = {
1164 static ctl_table dev_table
[] = {
1168 extern void init_irq_proc (void);
1170 static DEFINE_SPINLOCK(sysctl_lock
);
1172 /* called under sysctl_lock */
1173 static int use_table(struct ctl_table_header
*p
)
1175 if (unlikely(p
->unregistering
))
1181 /* called under sysctl_lock */
1182 static void unuse_table(struct ctl_table_header
*p
)
1185 if (unlikely(p
->unregistering
))
1186 complete(p
->unregistering
);
1189 /* called under sysctl_lock, will reacquire if has to wait */
1190 static void start_unregistering(struct ctl_table_header
*p
)
1193 * if p->used is 0, nobody will ever touch that entry again;
1194 * we'll eliminate all paths to it before dropping sysctl_lock
1196 if (unlikely(p
->used
)) {
1197 struct completion wait
;
1198 init_completion(&wait
);
1199 p
->unregistering
= &wait
;
1200 spin_unlock(&sysctl_lock
);
1201 wait_for_completion(&wait
);
1202 spin_lock(&sysctl_lock
);
1205 * do not remove from the list until nobody holds it; walking the
1206 * list in do_sysctl() relies on that.
1208 list_del_init(&p
->ctl_entry
);
1211 void __init
sysctl_init(void)
1213 #ifdef CONFIG_PROC_SYSCTL
1214 register_proc_table(root_table
, proc_sys_root
, &root_table_header
);
1219 #ifdef CONFIG_SYSCTL_SYSCALL
1220 int do_sysctl(int __user
*name
, int nlen
, void __user
*oldval
, size_t __user
*oldlenp
,
1221 void __user
*newval
, size_t newlen
)
1223 struct list_head
*tmp
;
1224 int error
= -ENOTDIR
;
1226 if (nlen
<= 0 || nlen
>= CTL_MAXNAME
)
1230 if (!oldlenp
|| get_user(old_len
, oldlenp
))
1233 spin_lock(&sysctl_lock
);
1234 tmp
= &root_table_header
.ctl_entry
;
1236 struct ctl_table_header
*head
=
1237 list_entry(tmp
, struct ctl_table_header
, ctl_entry
);
1238 void *context
= NULL
;
1240 if (!use_table(head
))
1243 spin_unlock(&sysctl_lock
);
1245 error
= parse_table(name
, nlen
, oldval
, oldlenp
,
1246 newval
, newlen
, head
->ctl_table
,
1250 spin_lock(&sysctl_lock
);
1252 if (error
!= -ENOTDIR
)
1254 } while ((tmp
= tmp
->next
) != &root_table_header
.ctl_entry
);
1255 spin_unlock(&sysctl_lock
);
1259 asmlinkage
long sys_sysctl(struct __sysctl_args __user
*args
)
1261 struct __sysctl_args tmp
;
1264 if (copy_from_user(&tmp
, args
, sizeof(tmp
)))
1268 error
= do_sysctl(tmp
.name
, tmp
.nlen
, tmp
.oldval
, tmp
.oldlenp
,
1269 tmp
.newval
, tmp
.newlen
);
1273 #endif /* CONFIG_SYSCTL_SYSCALL */
1276 * ctl_perm does NOT grant the superuser all rights automatically, because
1277 * some sysctl variables are readonly even to root.
1280 static int test_perm(int mode
, int op
)
1284 else if (in_egroup_p(0))
1286 if ((mode
& op
& 0007) == op
)
1291 static inline int ctl_perm(ctl_table
*table
, int op
)
1294 error
= security_sysctl(table
, op
);
1297 return test_perm(table
->mode
, op
);
1300 #ifdef CONFIG_SYSCTL_SYSCALL
1301 static int parse_table(int __user
*name
, int nlen
,
1302 void __user
*oldval
, size_t __user
*oldlenp
,
1303 void __user
*newval
, size_t newlen
,
1304 ctl_table
*table
, void **context
)
1310 if (get_user(n
, name
))
1312 for ( ; table
->ctl_name
; table
++) {
1313 if (n
== table
->ctl_name
|| table
->ctl_name
== CTL_ANY
) {
1316 if (ctl_perm(table
, 001))
1318 if (table
->strategy
) {
1319 error
= table
->strategy(
1322 newval
, newlen
, context
);
1328 table
= table
->child
;
1331 error
= do_sysctl_strategy(table
, name
, nlen
,
1333 newval
, newlen
, context
);
1340 /* Perform the actual read/write of a sysctl table entry. */
1341 int do_sysctl_strategy (ctl_table
*table
,
1342 int __user
*name
, int nlen
,
1343 void __user
*oldval
, size_t __user
*oldlenp
,
1344 void __user
*newval
, size_t newlen
, void **context
)
1353 if (ctl_perm(table
, op
))
1356 if (table
->strategy
) {
1357 rc
= table
->strategy(table
, name
, nlen
, oldval
, oldlenp
,
1358 newval
, newlen
, context
);
1365 /* If there is no strategy routine, or if the strategy returns
1366 * zero, proceed with automatic r/w */
1367 if (table
->data
&& table
->maxlen
) {
1368 if (oldval
&& oldlenp
) {
1369 if (get_user(len
, oldlenp
))
1372 if (len
> table
->maxlen
)
1373 len
= table
->maxlen
;
1374 if(copy_to_user(oldval
, table
->data
, len
))
1376 if(put_user(len
, oldlenp
))
1380 if (newval
&& newlen
) {
1382 if (len
> table
->maxlen
)
1383 len
= table
->maxlen
;
1384 if(copy_from_user(table
->data
, newval
, len
))
1390 #endif /* CONFIG_SYSCTL_SYSCALL */
1393 * register_sysctl_table - register a sysctl hierarchy
1394 * @table: the top-level table structure
1395 * @insert_at_head: whether the entry should be inserted in front or at the end
1397 * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1398 * array. An entry with a ctl_name of 0 terminates the table.
1400 * The members of the &ctl_table structure are used as follows:
1402 * ctl_name - This is the numeric sysctl value used by sysctl(2). The number
1403 * must be unique within that level of sysctl
1405 * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not
1406 * enter a sysctl file
1408 * data - a pointer to data for use by proc_handler
1410 * maxlen - the maximum size in bytes of the data
1412 * mode - the file permissions for the /proc/sys file, and for sysctl(2)
1414 * child - a pointer to the child sysctl table if this entry is a directory, or
1417 * proc_handler - the text handler routine (described below)
1419 * strategy - the strategy routine (described below)
1421 * de - for internal use by the sysctl routines
1423 * extra1, extra2 - extra pointers usable by the proc handler routines
1425 * Leaf nodes in the sysctl tree will be represented by a single file
1426 * under /proc; non-leaf nodes will be represented by directories.
1428 * sysctl(2) can automatically manage read and write requests through
1429 * the sysctl table. The data and maxlen fields of the ctl_table
1430 * struct enable minimal validation of the values being written to be
1431 * performed, and the mode field allows minimal authentication.
1433 * More sophisticated management can be enabled by the provision of a
1434 * strategy routine with the table entry. This will be called before
1435 * any automatic read or write of the data is performed.
1437 * The strategy routine may return
1439 * < 0 - Error occurred (error is passed to user process)
1441 * 0 - OK - proceed with automatic read or write.
1443 * > 0 - OK - read or write has been done by the strategy routine, so
1444 * return immediately.
1446 * There must be a proc_handler routine for any terminal nodes
1447 * mirrored under /proc/sys (non-terminals are handled by a built-in
1448 * directory handler). Several default handlers are available to
1449 * cover common cases -
1451 * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(),
1452 * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(),
1453 * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax()
1455 * It is the handler's job to read the input buffer from user memory
1456 * and process it. The handler should return 0 on success.
1458 * This routine returns %NULL on a failure to register, and a pointer
1459 * to the table header on success.
1461 struct ctl_table_header
*register_sysctl_table(ctl_table
* table
,
1464 struct ctl_table_header
*tmp
;
1465 tmp
= kmalloc(sizeof(struct ctl_table_header
), GFP_KERNEL
);
1468 tmp
->ctl_table
= table
;
1469 INIT_LIST_HEAD(&tmp
->ctl_entry
);
1471 tmp
->unregistering
= NULL
;
1472 spin_lock(&sysctl_lock
);
1474 list_add(&tmp
->ctl_entry
, &root_table_header
.ctl_entry
);
1476 list_add_tail(&tmp
->ctl_entry
, &root_table_header
.ctl_entry
);
1477 spin_unlock(&sysctl_lock
);
1478 #ifdef CONFIG_PROC_SYSCTL
1479 register_proc_table(table
, proc_sys_root
, tmp
);
1485 * unregister_sysctl_table - unregister a sysctl table hierarchy
1486 * @header: the header returned from register_sysctl_table
1488 * Unregisters the sysctl table and all children. proc entries may not
1489 * actually be removed until they are no longer used by anyone.
1491 void unregister_sysctl_table(struct ctl_table_header
* header
)
1494 spin_lock(&sysctl_lock
);
1495 start_unregistering(header
);
1496 #ifdef CONFIG_PROC_SYSCTL
1497 unregister_proc_table(header
->ctl_table
, proc_sys_root
);
1499 spin_unlock(&sysctl_lock
);
1503 #else /* !CONFIG_SYSCTL */
1504 struct ctl_table_header
* register_sysctl_table(ctl_table
* table
,
1510 void unregister_sysctl_table(struct ctl_table_header
* table
)
1514 #endif /* CONFIG_SYSCTL */
1520 #ifdef CONFIG_PROC_SYSCTL
1522 /* Scan the sysctl entries in table and add them all into /proc */
1523 static void register_proc_table(ctl_table
* table
, struct proc_dir_entry
*root
, void *set
)
1525 struct proc_dir_entry
*de
;
1529 for (; table
->ctl_name
; table
++) {
1530 /* Can't do anything without a proc name. */
1531 if (!table
->procname
)
1533 /* Maybe we can't do anything with it... */
1534 if (!table
->proc_handler
&& !table
->child
) {
1535 printk(KERN_WARNING
"SYSCTL: Can't register %s\n",
1540 len
= strlen(table
->procname
);
1544 if (table
->proc_handler
)
1548 for (de
= root
->subdir
; de
; de
= de
->next
) {
1549 if (proc_match(len
, table
->procname
, de
))
1552 /* If the subdir exists already, de is non-NULL */
1556 de
= create_proc_entry(table
->procname
, mode
, root
);
1560 de
->data
= (void *) table
;
1561 if (table
->proc_handler
)
1562 de
->proc_fops
= &proc_sys_file_operations
;
1565 if (de
->mode
& S_IFDIR
)
1566 register_proc_table(table
->child
, de
, set
);
1571 * Unregister a /proc sysctl table and any subdirectories.
1573 static void unregister_proc_table(ctl_table
* table
, struct proc_dir_entry
*root
)
1575 struct proc_dir_entry
*de
;
1576 for (; table
->ctl_name
; table
++) {
1577 if (!(de
= table
->de
))
1579 if (de
->mode
& S_IFDIR
) {
1580 if (!table
->child
) {
1581 printk (KERN_ALERT
"Help - malformed sysctl tree on free\n");
1584 unregister_proc_table(table
->child
, de
);
1586 /* Don't unregister directories which still have entries.. */
1592 * In any case, mark the entry as goner; we'll keep it
1593 * around if it's busy, but we'll know to do nothing with
1594 * its fields. We are under sysctl_lock here.
1598 /* Don't unregister proc entries that are still being used.. */
1599 if (atomic_read(&de
->count
))
1603 remove_proc_entry(table
->procname
, root
);
1607 static ssize_t
do_rw_proc(int write
, struct file
* file
, char __user
* buf
,
1608 size_t count
, loff_t
*ppos
)
1611 struct proc_dir_entry
*de
= PDE(file
->f_dentry
->d_inode
);
1612 struct ctl_table
*table
;
1614 ssize_t error
= -ENOTDIR
;
1616 spin_lock(&sysctl_lock
);
1617 if (de
&& de
->data
&& use_table(de
->set
)) {
1619 * at that point we know that sysctl was not unregistered
1620 * and won't be until we finish
1622 spin_unlock(&sysctl_lock
);
1623 table
= (struct ctl_table
*) de
->data
;
1624 if (!table
|| !table
->proc_handler
)
1627 op
= (write
? 002 : 004);
1628 if (ctl_perm(table
, op
))
1631 /* careful: calling conventions are nasty here */
1633 error
= (*table
->proc_handler
)(table
, write
, file
,
1638 spin_lock(&sysctl_lock
);
1639 unuse_table(de
->set
);
1641 spin_unlock(&sysctl_lock
);
1645 static int proc_opensys(struct inode
*inode
, struct file
*file
)
1647 if (file
->f_mode
& FMODE_WRITE
) {
1649 * sysctl entries that are not writable,
1650 * are _NOT_ writable, capabilities or not.
1652 if (!(inode
->i_mode
& S_IWUSR
))
1659 static ssize_t
proc_readsys(struct file
* file
, char __user
* buf
,
1660 size_t count
, loff_t
*ppos
)
1662 return do_rw_proc(0, file
, buf
, count
, ppos
);
1665 static ssize_t
proc_writesys(struct file
* file
, const char __user
* buf
,
1666 size_t count
, loff_t
*ppos
)
1668 return do_rw_proc(1, file
, (char __user
*) buf
, count
, ppos
);
1671 static int _proc_do_string(void* data
, int maxlen
, int write
,
1672 struct file
*filp
, void __user
*buffer
,
1673 size_t *lenp
, loff_t
*ppos
)
1679 if (!data
|| !maxlen
|| !*lenp
||
1680 (*ppos
&& !write
)) {
1688 while (len
< *lenp
) {
1689 if (get_user(c
, p
++))
1691 if (c
== 0 || c
== '\n')
1697 if(copy_from_user(data
, buffer
, len
))
1699 ((char *) data
)[len
] = 0;
1708 if(copy_to_user(buffer
, data
, len
))
1711 if(put_user('\n', ((char __user
*) buffer
) + len
))
1722 * proc_dostring - read a string sysctl
1723 * @table: the sysctl table
1724 * @write: %TRUE if this is a write to the sysctl file
1725 * @filp: the file structure
1726 * @buffer: the user buffer
1727 * @lenp: the size of the user buffer
1728 * @ppos: file position
1730 * Reads/writes a string from/to the user buffer. If the kernel
1731 * buffer provided is not large enough to hold the string, the
1732 * string is truncated. The copied string is %NULL-terminated.
1733 * If the string is being read by the user process, it is copied
1734 * and a newline '\n' is added. It is truncated if the buffer is
1737 * Returns 0 on success.
1739 int proc_dostring(ctl_table
*table
, int write
, struct file
*filp
,
1740 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1742 return _proc_do_string(table
->data
, table
->maxlen
, write
, filp
,
1743 buffer
, lenp
, ppos
);
1747 * Special case of dostring for the UTS structure. This has locks
1748 * to observe. Should this be in kernel/sys.c ????
1751 #ifndef CONFIG_UTS_NS
1752 static int proc_do_uts_string(ctl_table
*table
, int write
, struct file
*filp
,
1753 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1758 down_read(&uts_sem
);
1759 r
=proc_dostring(table
,0,filp
,buffer
,lenp
, ppos
);
1762 down_write(&uts_sem
);
1763 r
=proc_dostring(table
,1,filp
,buffer
,lenp
, ppos
);
1768 #else /* !CONFIG_UTS_NS */
1769 static int proc_do_uts_string(ctl_table
*table
, int write
, struct file
*filp
,
1770 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1773 struct uts_namespace
* uts_ns
= current
->nsproxy
->uts_ns
;
1776 switch (table
->ctl_name
) {
1778 which
= uts_ns
->name
.sysname
;
1781 which
= uts_ns
->name
.nodename
;
1783 case KERN_OSRELEASE
:
1784 which
= uts_ns
->name
.release
;
1787 which
= uts_ns
->name
.version
;
1789 case KERN_DOMAINNAME
:
1790 which
= uts_ns
->name
.domainname
;
1798 down_read(&uts_sem
);
1799 r
=_proc_do_string(which
,table
->maxlen
,0,filp
,buffer
,lenp
, ppos
);
1802 down_write(&uts_sem
);
1803 r
=_proc_do_string(which
,table
->maxlen
,1,filp
,buffer
,lenp
, ppos
);
1809 #endif /* !CONFIG_UTS_NS */
1811 static int do_proc_dointvec_conv(int *negp
, unsigned long *lvalp
,
1813 int write
, void *data
)
1816 *valp
= *negp
? -*lvalp
: *lvalp
;
1821 *lvalp
= (unsigned long)-val
;
1824 *lvalp
= (unsigned long)val
;
1830 static int __do_proc_dointvec(void *tbl_data
, ctl_table
*table
,
1831 int write
, struct file
*filp
, void __user
*buffer
,
1832 size_t *lenp
, loff_t
*ppos
,
1833 int (*conv
)(int *negp
, unsigned long *lvalp
, int *valp
,
1834 int write
, void *data
),
1837 #define TMPBUFLEN 21
1838 int *i
, vleft
, first
=1, neg
, val
;
1842 char buf
[TMPBUFLEN
], *p
;
1843 char __user
*s
= buffer
;
1845 if (!tbl_data
|| !table
->maxlen
|| !*lenp
||
1846 (*ppos
&& !write
)) {
1851 i
= (int *) tbl_data
;
1852 vleft
= table
->maxlen
/ sizeof(*i
);
1856 conv
= do_proc_dointvec_conv
;
1858 for (; left
&& vleft
--; i
++, first
=0) {
1873 if (len
> sizeof(buf
) - 1)
1874 len
= sizeof(buf
) - 1;
1875 if (copy_from_user(buf
, s
, len
))
1879 if (*p
== '-' && left
> 1) {
1883 if (*p
< '0' || *p
> '9')
1886 lval
= simple_strtoul(p
, &p
, 0);
1889 if ((len
< left
) && *p
&& !isspace(*p
))
1896 if (conv(&neg
, &lval
, i
, 1, data
))
1903 if (conv(&neg
, &lval
, i
, 0, data
))
1906 sprintf(p
, "%s%lu", neg
? "-" : "", lval
);
1910 if(copy_to_user(s
, buf
, len
))
1917 if (!write
&& !first
&& left
) {
1918 if(put_user('\n', s
))
1925 if (get_user(c
, s
++))
1940 static int do_proc_dointvec(ctl_table
*table
, int write
, struct file
*filp
,
1941 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
,
1942 int (*conv
)(int *negp
, unsigned long *lvalp
, int *valp
,
1943 int write
, void *data
),
1946 return __do_proc_dointvec(table
->data
, table
, write
, filp
,
1947 buffer
, lenp
, ppos
, conv
, data
);
1951 * proc_dointvec - read a vector of integers
1952 * @table: the sysctl table
1953 * @write: %TRUE if this is a write to the sysctl file
1954 * @filp: the file structure
1955 * @buffer: the user buffer
1956 * @lenp: the size of the user buffer
1957 * @ppos: file position
1959 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
1960 * values from/to the user buffer, treated as an ASCII string.
1962 * Returns 0 on success.
1964 int proc_dointvec(ctl_table
*table
, int write
, struct file
*filp
,
1965 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1967 return do_proc_dointvec(table
,write
,filp
,buffer
,lenp
,ppos
,
1977 static int do_proc_dointvec_bset_conv(int *negp
, unsigned long *lvalp
,
1979 int write
, void *data
)
1981 int op
= *(int *)data
;
1983 int val
= *negp
? -*lvalp
: *lvalp
;
1985 case OP_SET
: *valp
= val
; break;
1986 case OP_AND
: *valp
&= val
; break;
1987 case OP_OR
: *valp
|= val
; break;
1988 case OP_MAX
: if(*valp
< val
)
1991 case OP_MIN
: if(*valp
> val
)
1999 *lvalp
= (unsigned long)-val
;
2002 *lvalp
= (unsigned long)val
;
2009 * init may raise the set.
2012 int proc_dointvec_bset(ctl_table
*table
, int write
, struct file
*filp
,
2013 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2017 if (!capable(CAP_SYS_MODULE
)) {
2021 op
= is_init(current
) ? OP_SET
: OP_AND
;
2022 return do_proc_dointvec(table
,write
,filp
,buffer
,lenp
,ppos
,
2023 do_proc_dointvec_bset_conv
,&op
);
2026 struct do_proc_dointvec_minmax_conv_param
{
2031 static int do_proc_dointvec_minmax_conv(int *negp
, unsigned long *lvalp
,
2033 int write
, void *data
)
2035 struct do_proc_dointvec_minmax_conv_param
*param
= data
;
2037 int val
= *negp
? -*lvalp
: *lvalp
;
2038 if ((param
->min
&& *param
->min
> val
) ||
2039 (param
->max
&& *param
->max
< val
))
2046 *lvalp
= (unsigned long)-val
;
2049 *lvalp
= (unsigned long)val
;
2056 * proc_dointvec_minmax - read a vector of integers with min/max values
2057 * @table: the sysctl table
2058 * @write: %TRUE if this is a write to the sysctl file
2059 * @filp: the file structure
2060 * @buffer: the user buffer
2061 * @lenp: the size of the user buffer
2062 * @ppos: file position
2064 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2065 * values from/to the user buffer, treated as an ASCII string.
2067 * This routine will ensure the values are within the range specified by
2068 * table->extra1 (min) and table->extra2 (max).
2070 * Returns 0 on success.
2072 int proc_dointvec_minmax(ctl_table
*table
, int write
, struct file
*filp
,
2073 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2075 struct do_proc_dointvec_minmax_conv_param param
= {
2076 .min
= (int *) table
->extra1
,
2077 .max
= (int *) table
->extra2
,
2079 return do_proc_dointvec(table
, write
, filp
, buffer
, lenp
, ppos
,
2080 do_proc_dointvec_minmax_conv
, ¶m
);
2083 static int __do_proc_doulongvec_minmax(void *data
, ctl_table
*table
, int write
,
2085 void __user
*buffer
,
2086 size_t *lenp
, loff_t
*ppos
,
2087 unsigned long convmul
,
2088 unsigned long convdiv
)
2090 #define TMPBUFLEN 21
2091 unsigned long *i
, *min
, *max
, val
;
2092 int vleft
, first
=1, neg
;
2094 char buf
[TMPBUFLEN
], *p
;
2095 char __user
*s
= buffer
;
2097 if (!data
|| !table
->maxlen
|| !*lenp
||
2098 (*ppos
&& !write
)) {
2103 i
= (unsigned long *) data
;
2104 min
= (unsigned long *) table
->extra1
;
2105 max
= (unsigned long *) table
->extra2
;
2106 vleft
= table
->maxlen
/ sizeof(unsigned long);
2109 for (; left
&& vleft
--; i
++, min
++, max
++, first
=0) {
2124 if (len
> TMPBUFLEN
-1)
2126 if (copy_from_user(buf
, s
, len
))
2130 if (*p
== '-' && left
> 1) {
2134 if (*p
< '0' || *p
> '9')
2136 val
= simple_strtoul(p
, &p
, 0) * convmul
/ convdiv
;
2138 if ((len
< left
) && *p
&& !isspace(*p
))
2147 if ((min
&& val
< *min
) || (max
&& val
> *max
))
2154 sprintf(p
, "%lu", convdiv
* (*i
) / convmul
);
2158 if(copy_to_user(s
, buf
, len
))
2165 if (!write
&& !first
&& left
) {
2166 if(put_user('\n', s
))
2173 if (get_user(c
, s
++))
2188 static int do_proc_doulongvec_minmax(ctl_table
*table
, int write
,
2190 void __user
*buffer
,
2191 size_t *lenp
, loff_t
*ppos
,
2192 unsigned long convmul
,
2193 unsigned long convdiv
)
2195 return __do_proc_doulongvec_minmax(table
->data
, table
, write
,
2196 filp
, buffer
, lenp
, ppos
, convmul
, convdiv
);
2200 * proc_doulongvec_minmax - read a vector of long integers with min/max values
2201 * @table: the sysctl table
2202 * @write: %TRUE if this is a write to the sysctl file
2203 * @filp: the file structure
2204 * @buffer: the user buffer
2205 * @lenp: the size of the user buffer
2206 * @ppos: file position
2208 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2209 * values from/to the user buffer, treated as an ASCII string.
2211 * This routine will ensure the values are within the range specified by
2212 * table->extra1 (min) and table->extra2 (max).
2214 * Returns 0 on success.
2216 int proc_doulongvec_minmax(ctl_table
*table
, int write
, struct file
*filp
,
2217 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2219 return do_proc_doulongvec_minmax(table
, write
, filp
, buffer
, lenp
, ppos
, 1l, 1l);
2223 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
2224 * @table: the sysctl table
2225 * @write: %TRUE if this is a write to the sysctl file
2226 * @filp: the file structure
2227 * @buffer: the user buffer
2228 * @lenp: the size of the user buffer
2229 * @ppos: file position
2231 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2232 * values from/to the user buffer, treated as an ASCII string. The values
2233 * are treated as milliseconds, and converted to jiffies when they are stored.
2235 * This routine will ensure the values are within the range specified by
2236 * table->extra1 (min) and table->extra2 (max).
2238 * Returns 0 on success.
2240 int proc_doulongvec_ms_jiffies_minmax(ctl_table
*table
, int write
,
2242 void __user
*buffer
,
2243 size_t *lenp
, loff_t
*ppos
)
2245 return do_proc_doulongvec_minmax(table
, write
, filp
, buffer
,
2246 lenp
, ppos
, HZ
, 1000l);
2250 static int do_proc_dointvec_jiffies_conv(int *negp
, unsigned long *lvalp
,
2252 int write
, void *data
)
2255 if (*lvalp
> LONG_MAX
/ HZ
)
2257 *valp
= *negp
? -(*lvalp
*HZ
) : (*lvalp
*HZ
);
2263 lval
= (unsigned long)-val
;
2266 lval
= (unsigned long)val
;
2273 static int do_proc_dointvec_userhz_jiffies_conv(int *negp
, unsigned long *lvalp
,
2275 int write
, void *data
)
2278 if (USER_HZ
< HZ
&& *lvalp
> (LONG_MAX
/ HZ
) * USER_HZ
)
2280 *valp
= clock_t_to_jiffies(*negp
? -*lvalp
: *lvalp
);
2286 lval
= (unsigned long)-val
;
2289 lval
= (unsigned long)val
;
2291 *lvalp
= jiffies_to_clock_t(lval
);
2296 static int do_proc_dointvec_ms_jiffies_conv(int *negp
, unsigned long *lvalp
,
2298 int write
, void *data
)
2301 *valp
= msecs_to_jiffies(*negp
? -*lvalp
: *lvalp
);
2307 lval
= (unsigned long)-val
;
2310 lval
= (unsigned long)val
;
2312 *lvalp
= jiffies_to_msecs(lval
);
2318 * proc_dointvec_jiffies - read a vector of integers as seconds
2319 * @table: the sysctl table
2320 * @write: %TRUE if this is a write to the sysctl file
2321 * @filp: the file structure
2322 * @buffer: the user buffer
2323 * @lenp: the size of the user buffer
2324 * @ppos: file position
2326 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2327 * values from/to the user buffer, treated as an ASCII string.
2328 * The values read are assumed to be in seconds, and are converted into
2331 * Returns 0 on success.
2333 int proc_dointvec_jiffies(ctl_table
*table
, int write
, struct file
*filp
,
2334 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2336 return do_proc_dointvec(table
,write
,filp
,buffer
,lenp
,ppos
,
2337 do_proc_dointvec_jiffies_conv
,NULL
);
2341 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
2342 * @table: the sysctl table
2343 * @write: %TRUE if this is a write to the sysctl file
2344 * @filp: the file structure
2345 * @buffer: the user buffer
2346 * @lenp: the size of the user buffer
2347 * @ppos: pointer to the file position
2349 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2350 * values from/to the user buffer, treated as an ASCII string.
2351 * The values read are assumed to be in 1/USER_HZ seconds, and
2352 * are converted into jiffies.
2354 * Returns 0 on success.
2356 int proc_dointvec_userhz_jiffies(ctl_table
*table
, int write
, struct file
*filp
,
2357 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2359 return do_proc_dointvec(table
,write
,filp
,buffer
,lenp
,ppos
,
2360 do_proc_dointvec_userhz_jiffies_conv
,NULL
);
2364 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
2365 * @table: the sysctl table
2366 * @write: %TRUE if this is a write to the sysctl file
2367 * @filp: the file structure
2368 * @buffer: the user buffer
2369 * @lenp: the size of the user buffer
2370 * @ppos: file position
2371 * @ppos: the current position in the file
2373 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2374 * values from/to the user buffer, treated as an ASCII string.
2375 * The values read are assumed to be in 1/1000 seconds, and
2376 * are converted into jiffies.
2378 * Returns 0 on success.
2380 int proc_dointvec_ms_jiffies(ctl_table
*table
, int write
, struct file
*filp
,
2381 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2383 return do_proc_dointvec(table
, write
, filp
, buffer
, lenp
, ppos
,
2384 do_proc_dointvec_ms_jiffies_conv
, NULL
);
2387 #ifdef CONFIG_SYSVIPC
2388 static int proc_do_ipc_string(ctl_table
*table
, int write
, struct file
*filp
,
2389 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2392 struct ipc_namespace
*ns
;
2394 ns
= current
->nsproxy
->ipc_ns
;
2396 switch (table
->ctl_name
) {
2398 data
= &ns
->shm_ctlmax
;
2401 data
= &ns
->shm_ctlall
;
2404 data
= &ns
->shm_ctlmni
;
2407 data
= &ns
->msg_ctlmax
;
2410 data
= &ns
->msg_ctlmni
;
2413 data
= &ns
->msg_ctlmnb
;
2416 data
= &ns
->sem_ctls
;
2422 return __do_proc_dointvec(data
, table
, write
, filp
, buffer
,
2423 lenp
, ppos
, NULL
, NULL
);
2425 return __do_proc_doulongvec_minmax(data
, table
, write
, filp
, buffer
,
2426 lenp
, ppos
, 1l, 1l);
2430 #else /* CONFIG_PROC_FS */
2432 int proc_dostring(ctl_table
*table
, int write
, struct file
*filp
,
2433 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2438 static int proc_do_uts_string(ctl_table
*table
, int write
, struct file
*filp
,
2439 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2444 #ifdef CONFIG_SYSVIPC
2445 static int proc_do_ipc_string(ctl_table
*table
, int write
, struct file
*filp
,
2446 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2452 int proc_dointvec(ctl_table
*table
, int write
, struct file
*filp
,
2453 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2458 int proc_dointvec_bset(ctl_table
*table
, int write
, struct file
*filp
,
2459 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2464 int proc_dointvec_minmax(ctl_table
*table
, int write
, struct file
*filp
,
2465 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2470 int proc_dointvec_jiffies(ctl_table
*table
, int write
, struct file
*filp
,
2471 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2476 int proc_dointvec_userhz_jiffies(ctl_table
*table
, int write
, struct file
*filp
,
2477 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2482 int proc_dointvec_ms_jiffies(ctl_table
*table
, int write
, struct file
*filp
,
2483 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2488 int proc_doulongvec_minmax(ctl_table
*table
, int write
, struct file
*filp
,
2489 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2494 int proc_doulongvec_ms_jiffies_minmax(ctl_table
*table
, int write
,
2496 void __user
*buffer
,
2497 size_t *lenp
, loff_t
*ppos
)
2503 #endif /* CONFIG_PROC_FS */
2506 #ifdef CONFIG_SYSCTL_SYSCALL
2508 * General sysctl support routines
2511 /* The generic string strategy routine: */
2512 int sysctl_string(ctl_table
*table
, int __user
*name
, int nlen
,
2513 void __user
*oldval
, size_t __user
*oldlenp
,
2514 void __user
*newval
, size_t newlen
, void **context
)
2516 if (!table
->data
|| !table
->maxlen
)
2519 if (oldval
&& oldlenp
) {
2521 if (get_user(bufsize
, oldlenp
))
2524 size_t len
= strlen(table
->data
), copied
;
2526 /* This shouldn't trigger for a well-formed sysctl */
2527 if (len
> table
->maxlen
)
2528 len
= table
->maxlen
;
2530 /* Copy up to a max of bufsize-1 bytes of the string */
2531 copied
= (len
>= bufsize
) ? bufsize
- 1 : len
;
2533 if (copy_to_user(oldval
, table
->data
, copied
) ||
2534 put_user(0, (char __user
*)(oldval
+ copied
)))
2536 if (put_user(len
, oldlenp
))
2540 if (newval
&& newlen
) {
2541 size_t len
= newlen
;
2542 if (len
> table
->maxlen
)
2543 len
= table
->maxlen
;
2544 if(copy_from_user(table
->data
, newval
, len
))
2546 if (len
== table
->maxlen
)
2548 ((char *) table
->data
)[len
] = 0;
2554 * This function makes sure that all of the integers in the vector
2555 * are between the minimum and maximum values given in the arrays
2556 * table->extra1 and table->extra2, respectively.
2558 int sysctl_intvec(ctl_table
*table
, int __user
*name
, int nlen
,
2559 void __user
*oldval
, size_t __user
*oldlenp
,
2560 void __user
*newval
, size_t newlen
, void **context
)
2563 if (newval
&& newlen
) {
2564 int __user
*vec
= (int __user
*) newval
;
2565 int *min
= (int *) table
->extra1
;
2566 int *max
= (int *) table
->extra2
;
2570 if (newlen
% sizeof(int) != 0)
2573 if (!table
->extra1
&& !table
->extra2
)
2576 if (newlen
> table
->maxlen
)
2577 newlen
= table
->maxlen
;
2578 length
= newlen
/ sizeof(int);
2580 for (i
= 0; i
< length
; i
++) {
2582 if (get_user(value
, vec
+ i
))
2584 if (min
&& value
< min
[i
])
2586 if (max
&& value
> max
[i
])
2593 /* Strategy function to convert jiffies to seconds */
2594 int sysctl_jiffies(ctl_table
*table
, int __user
*name
, int nlen
,
2595 void __user
*oldval
, size_t __user
*oldlenp
,
2596 void __user
*newval
, size_t newlen
, void **context
)
2601 if (get_user(olen
, oldlenp
))
2603 if (olen
!=sizeof(int))
2606 if (put_user(*(int *)(table
->data
)/HZ
, (int __user
*)oldval
) ||
2607 (oldlenp
&& put_user(sizeof(int),oldlenp
)))
2610 if (newval
&& newlen
) {
2612 if (newlen
!= sizeof(int))
2614 if (get_user(new, (int __user
*)newval
))
2616 *(int *)(table
->data
) = new*HZ
;
2621 /* Strategy function to convert jiffies to seconds */
2622 int sysctl_ms_jiffies(ctl_table
*table
, int __user
*name
, int nlen
,
2623 void __user
*oldval
, size_t __user
*oldlenp
,
2624 void __user
*newval
, size_t newlen
, void **context
)
2629 if (get_user(olen
, oldlenp
))
2631 if (olen
!=sizeof(int))
2634 if (put_user(jiffies_to_msecs(*(int *)(table
->data
)), (int __user
*)oldval
) ||
2635 (oldlenp
&& put_user(sizeof(int),oldlenp
)))
2638 if (newval
&& newlen
) {
2640 if (newlen
!= sizeof(int))
2642 if (get_user(new, (int __user
*)newval
))
2644 *(int *)(table
->data
) = msecs_to_jiffies(new);
2649 #else /* CONFIG_SYSCTL_SYSCALL */
2652 asmlinkage
long sys_sysctl(struct __sysctl_args __user
*args
)
2654 static int msg_count
;
2656 if (msg_count
< 5) {
2659 "warning: process `%s' used the removed sysctl "
2660 "system call\n", current
->comm
);
2665 int sysctl_string(ctl_table
*table
, int __user
*name
, int nlen
,
2666 void __user
*oldval
, size_t __user
*oldlenp
,
2667 void __user
*newval
, size_t newlen
, void **context
)
2672 int sysctl_intvec(ctl_table
*table
, int __user
*name
, int nlen
,
2673 void __user
*oldval
, size_t __user
*oldlenp
,
2674 void __user
*newval
, size_t newlen
, void **context
)
2679 int sysctl_jiffies(ctl_table
*table
, int __user
*name
, int nlen
,
2680 void __user
*oldval
, size_t __user
*oldlenp
,
2681 void __user
*newval
, size_t newlen
, void **context
)
2686 int sysctl_ms_jiffies(ctl_table
*table
, int __user
*name
, int nlen
,
2687 void __user
*oldval
, size_t __user
*oldlenp
,
2688 void __user
*newval
, size_t newlen
, void **context
)
2693 #endif /* CONFIG_SYSCTL_SYSCALL */
2696 * No sense putting this after each symbol definition, twice,
2697 * exception granted :-)
2699 EXPORT_SYMBOL(proc_dointvec
);
2700 EXPORT_SYMBOL(proc_dointvec_jiffies
);
2701 EXPORT_SYMBOL(proc_dointvec_minmax
);
2702 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies
);
2703 EXPORT_SYMBOL(proc_dointvec_ms_jiffies
);
2704 EXPORT_SYMBOL(proc_dostring
);
2705 EXPORT_SYMBOL(proc_doulongvec_minmax
);
2706 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax
);
2707 EXPORT_SYMBOL(register_sysctl_table
);
2708 EXPORT_SYMBOL(sysctl_intvec
);
2709 EXPORT_SYMBOL(sysctl_jiffies
);
2710 EXPORT_SYMBOL(sysctl_ms_jiffies
);
2711 EXPORT_SYMBOL(sysctl_string
);
2712 EXPORT_SYMBOL(unregister_sysctl_table
);