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
);
57 #include <asm/stacktrace.h>
60 #if defined(CONFIG_SYSCTL)
62 /* External variables not in a header file. */
64 extern int sysctl_overcommit_memory
;
65 extern int sysctl_overcommit_ratio
;
66 extern int sysctl_panic_on_oom
;
67 extern int max_threads
;
68 extern int sysrq_enabled
;
69 extern int core_uses_pid
;
70 extern int suid_dumpable
;
71 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 #ifdef CONFIG_PROC_SYSCTL
141 static int proc_do_cad_pid(ctl_table
*table
, int write
, struct file
*filp
,
142 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
);
145 static ctl_table root_table
[];
146 static struct ctl_table_header root_table_header
=
147 { root_table
, LIST_HEAD_INIT(root_table_header
.ctl_entry
) };
149 static ctl_table kern_table
[];
150 static ctl_table vm_table
[];
151 static ctl_table fs_table
[];
152 static ctl_table debug_table
[];
153 static ctl_table dev_table
[];
154 extern ctl_table random_table
[];
155 #ifdef CONFIG_UNIX98_PTYS
156 extern ctl_table pty_table
[];
158 #ifdef CONFIG_INOTIFY_USER
159 extern ctl_table inotify_table
[];
162 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
163 int sysctl_legacy_va_layout
;
166 /* /proc declarations: */
168 #ifdef CONFIG_PROC_SYSCTL
170 static ssize_t
proc_readsys(struct file
*, char __user
*, size_t, loff_t
*);
171 static ssize_t
proc_writesys(struct file
*, const char __user
*, size_t, loff_t
*);
172 static int proc_opensys(struct inode
*, struct file
*);
174 const struct file_operations proc_sys_file_operations
= {
175 .open
= proc_opensys
,
176 .read
= proc_readsys
,
177 .write
= proc_writesys
,
180 extern struct proc_dir_entry
*proc_sys_root
;
182 static void register_proc_table(ctl_table
*, struct proc_dir_entry
*, void *);
183 static void unregister_proc_table(ctl_table
*, struct proc_dir_entry
*);
186 /* The default sysctl tables: */
188 static ctl_table root_table
[] = {
190 .ctl_name
= CTL_KERN
,
191 .procname
= "kernel",
216 .ctl_name
= CTL_DEBUG
,
219 .child
= debug_table
,
231 static ctl_table kern_table
[] = {
232 #ifndef CONFIG_UTS_NS
234 .ctl_name
= KERN_OSTYPE
,
235 .procname
= "ostype",
236 .data
= init_uts_ns
.name
.sysname
,
237 .maxlen
= sizeof(init_uts_ns
.name
.sysname
),
239 .proc_handler
= &proc_do_uts_string
,
240 .strategy
= &sysctl_string
,
243 .ctl_name
= KERN_OSRELEASE
,
244 .procname
= "osrelease",
245 .data
= init_uts_ns
.name
.release
,
246 .maxlen
= sizeof(init_uts_ns
.name
.release
),
248 .proc_handler
= &proc_do_uts_string
,
249 .strategy
= &sysctl_string
,
252 .ctl_name
= KERN_VERSION
,
253 .procname
= "version",
254 .data
= init_uts_ns
.name
.version
,
255 .maxlen
= sizeof(init_uts_ns
.name
.version
),
257 .proc_handler
= &proc_do_uts_string
,
258 .strategy
= &sysctl_string
,
261 .ctl_name
= KERN_NODENAME
,
262 .procname
= "hostname",
263 .data
= init_uts_ns
.name
.nodename
,
264 .maxlen
= sizeof(init_uts_ns
.name
.nodename
),
266 .proc_handler
= &proc_do_uts_string
,
267 .strategy
= &sysctl_string
,
270 .ctl_name
= KERN_DOMAINNAME
,
271 .procname
= "domainname",
272 .data
= init_uts_ns
.name
.domainname
,
273 .maxlen
= sizeof(init_uts_ns
.name
.domainname
),
275 .proc_handler
= &proc_do_uts_string
,
276 .strategy
= &sysctl_string
,
278 #else /* !CONFIG_UTS_NS */
280 .ctl_name
= KERN_OSTYPE
,
281 .procname
= "ostype",
283 /* could maybe use __NEW_UTS_LEN here? */
284 .maxlen
= FIELD_SIZEOF(struct new_utsname
, sysname
),
286 .proc_handler
= &proc_do_uts_string
,
287 .strategy
= &sysctl_string
,
290 .ctl_name
= KERN_OSRELEASE
,
291 .procname
= "osrelease",
293 .maxlen
= FIELD_SIZEOF(struct new_utsname
, release
),
295 .proc_handler
= &proc_do_uts_string
,
296 .strategy
= &sysctl_string
,
299 .ctl_name
= KERN_VERSION
,
300 .procname
= "version",
302 .maxlen
= FIELD_SIZEOF(struct new_utsname
, version
),
304 .proc_handler
= &proc_do_uts_string
,
305 .strategy
= &sysctl_string
,
308 .ctl_name
= KERN_NODENAME
,
309 .procname
= "hostname",
311 .maxlen
= FIELD_SIZEOF(struct new_utsname
, nodename
),
313 .proc_handler
= &proc_do_uts_string
,
314 .strategy
= &sysctl_string
,
317 .ctl_name
= KERN_DOMAINNAME
,
318 .procname
= "domainname",
320 .maxlen
= FIELD_SIZEOF(struct new_utsname
, domainname
),
322 .proc_handler
= &proc_do_uts_string
,
323 .strategy
= &sysctl_string
,
325 #endif /* !CONFIG_UTS_NS */
327 .ctl_name
= KERN_PANIC
,
329 .data
= &panic_timeout
,
330 .maxlen
= sizeof(int),
332 .proc_handler
= &proc_dointvec
,
335 .ctl_name
= KERN_CORE_USES_PID
,
336 .procname
= "core_uses_pid",
337 .data
= &core_uses_pid
,
338 .maxlen
= sizeof(int),
340 .proc_handler
= &proc_dointvec
,
343 .ctl_name
= KERN_CORE_PATTERN
,
344 .procname
= "core_pattern",
345 .data
= core_pattern
,
348 .proc_handler
= &proc_dostring
,
349 .strategy
= &sysctl_string
,
352 .ctl_name
= KERN_TAINTED
,
353 .procname
= "tainted",
355 .maxlen
= sizeof(int),
357 .proc_handler
= &proc_dointvec
,
360 .ctl_name
= KERN_CAP_BSET
,
361 .procname
= "cap-bound",
363 .maxlen
= sizeof(kernel_cap_t
),
365 .proc_handler
= &proc_dointvec_bset
,
367 #ifdef CONFIG_BLK_DEV_INITRD
369 .ctl_name
= KERN_REALROOTDEV
,
370 .procname
= "real-root-dev",
371 .data
= &real_root_dev
,
372 .maxlen
= sizeof(int),
374 .proc_handler
= &proc_dointvec
,
379 .ctl_name
= KERN_SPARC_REBOOT
,
380 .procname
= "reboot-cmd",
381 .data
= reboot_command
,
384 .proc_handler
= &proc_dostring
,
385 .strategy
= &sysctl_string
,
388 .ctl_name
= KERN_SPARC_STOP_A
,
389 .procname
= "stop-a",
390 .data
= &stop_a_enabled
,
391 .maxlen
= sizeof (int),
393 .proc_handler
= &proc_dointvec
,
396 .ctl_name
= KERN_SPARC_SCONS_PWROFF
,
397 .procname
= "scons-poweroff",
398 .data
= &scons_pwroff
,
399 .maxlen
= sizeof (int),
401 .proc_handler
= &proc_dointvec
,
406 .ctl_name
= KERN_HPPA_PWRSW
,
407 .procname
= "soft-power",
408 .data
= &pwrsw_enabled
,
409 .maxlen
= sizeof (int),
411 .proc_handler
= &proc_dointvec
,
414 .ctl_name
= KERN_HPPA_UNALIGNED
,
415 .procname
= "unaligned-trap",
416 .data
= &unaligned_enabled
,
417 .maxlen
= sizeof (int),
419 .proc_handler
= &proc_dointvec
,
423 .ctl_name
= KERN_CTLALTDEL
,
424 .procname
= "ctrl-alt-del",
426 .maxlen
= sizeof(int),
428 .proc_handler
= &proc_dointvec
,
431 .ctl_name
= KERN_PRINTK
,
432 .procname
= "printk",
433 .data
= &console_loglevel
,
434 .maxlen
= 4*sizeof(int),
436 .proc_handler
= &proc_dointvec
,
440 .ctl_name
= KERN_MODPROBE
,
441 .procname
= "modprobe",
442 .data
= &modprobe_path
,
443 .maxlen
= KMOD_PATH_LEN
,
445 .proc_handler
= &proc_dostring
,
446 .strategy
= &sysctl_string
,
449 #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
451 .ctl_name
= KERN_HOTPLUG
,
452 .procname
= "hotplug",
453 .data
= &uevent_helper
,
454 .maxlen
= UEVENT_HELPER_PATH_LEN
,
456 .proc_handler
= &proc_dostring
,
457 .strategy
= &sysctl_string
,
460 #ifdef CONFIG_CHR_DEV_SG
462 .ctl_name
= KERN_SG_BIG_BUFF
,
463 .procname
= "sg-big-buff",
464 .data
= &sg_big_buff
,
465 .maxlen
= sizeof (int),
467 .proc_handler
= &proc_dointvec
,
470 #ifdef CONFIG_BSD_PROCESS_ACCT
472 .ctl_name
= KERN_ACCT
,
475 .maxlen
= 3*sizeof(int),
477 .proc_handler
= &proc_dointvec
,
480 #ifdef CONFIG_SYSVIPC
482 .ctl_name
= KERN_SHMMAX
,
483 .procname
= "shmmax",
485 .maxlen
= sizeof (size_t),
487 .proc_handler
= &proc_do_ipc_string
,
490 .ctl_name
= KERN_SHMALL
,
491 .procname
= "shmall",
493 .maxlen
= sizeof (size_t),
495 .proc_handler
= &proc_do_ipc_string
,
498 .ctl_name
= KERN_SHMMNI
,
499 .procname
= "shmmni",
501 .maxlen
= sizeof (int),
503 .proc_handler
= &proc_do_ipc_string
,
506 .ctl_name
= KERN_MSGMAX
,
507 .procname
= "msgmax",
509 .maxlen
= sizeof (int),
511 .proc_handler
= &proc_do_ipc_string
,
514 .ctl_name
= KERN_MSGMNI
,
515 .procname
= "msgmni",
517 .maxlen
= sizeof (int),
519 .proc_handler
= &proc_do_ipc_string
,
522 .ctl_name
= KERN_MSGMNB
,
523 .procname
= "msgmnb",
525 .maxlen
= sizeof (int),
527 .proc_handler
= &proc_do_ipc_string
,
530 .ctl_name
= KERN_SEM
,
533 .maxlen
= 4*sizeof (int),
535 .proc_handler
= &proc_do_ipc_string
,
538 #ifdef CONFIG_MAGIC_SYSRQ
540 .ctl_name
= KERN_SYSRQ
,
542 .data
= &sysrq_enabled
,
543 .maxlen
= sizeof (int),
545 .proc_handler
= &proc_dointvec
,
548 #ifdef CONFIG_PROC_SYSCTL
550 .ctl_name
= KERN_CADPID
,
551 .procname
= "cad_pid",
553 .maxlen
= sizeof (int),
555 .proc_handler
= &proc_do_cad_pid
,
559 .ctl_name
= KERN_MAX_THREADS
,
560 .procname
= "threads-max",
561 .data
= &max_threads
,
562 .maxlen
= sizeof(int),
564 .proc_handler
= &proc_dointvec
,
567 .ctl_name
= KERN_RANDOM
,
568 .procname
= "random",
570 .child
= random_table
,
572 #ifdef CONFIG_UNIX98_PTYS
574 .ctl_name
= KERN_PTY
,
581 .ctl_name
= KERN_OVERFLOWUID
,
582 .procname
= "overflowuid",
583 .data
= &overflowuid
,
584 .maxlen
= sizeof(int),
586 .proc_handler
= &proc_dointvec_minmax
,
587 .strategy
= &sysctl_intvec
,
588 .extra1
= &minolduid
,
589 .extra2
= &maxolduid
,
592 .ctl_name
= KERN_OVERFLOWGID
,
593 .procname
= "overflowgid",
594 .data
= &overflowgid
,
595 .maxlen
= sizeof(int),
597 .proc_handler
= &proc_dointvec_minmax
,
598 .strategy
= &sysctl_intvec
,
599 .extra1
= &minolduid
,
600 .extra2
= &maxolduid
,
603 #ifdef CONFIG_MATHEMU
605 .ctl_name
= KERN_IEEE_EMULATION_WARNINGS
,
606 .procname
= "ieee_emulation_warnings",
607 .data
= &sysctl_ieee_emulation_warnings
,
608 .maxlen
= sizeof(int),
610 .proc_handler
= &proc_dointvec
,
613 #ifdef CONFIG_NO_IDLE_HZ
615 .ctl_name
= KERN_HZ_TIMER
,
616 .procname
= "hz_timer",
617 .data
= &sysctl_hz_timer
,
618 .maxlen
= sizeof(int),
620 .proc_handler
= &proc_dointvec
,
624 .ctl_name
= KERN_S390_USER_DEBUG_LOGGING
,
625 .procname
= "userprocess_debug",
626 .data
= &sysctl_userprocess_debug
,
627 .maxlen
= sizeof(int),
629 .proc_handler
= &proc_dointvec
,
633 .ctl_name
= KERN_PIDMAX
,
634 .procname
= "pid_max",
636 .maxlen
= sizeof (int),
638 .proc_handler
= &proc_dointvec_minmax
,
639 .strategy
= sysctl_intvec
,
640 .extra1
= &pid_max_min
,
641 .extra2
= &pid_max_max
,
644 .ctl_name
= KERN_PANIC_ON_OOPS
,
645 .procname
= "panic_on_oops",
646 .data
= &panic_on_oops
,
647 .maxlen
= sizeof(int),
649 .proc_handler
= &proc_dointvec
,
652 .ctl_name
= KERN_PRINTK_RATELIMIT
,
653 .procname
= "printk_ratelimit",
654 .data
= &printk_ratelimit_jiffies
,
655 .maxlen
= sizeof(int),
657 .proc_handler
= &proc_dointvec_jiffies
,
658 .strategy
= &sysctl_jiffies
,
661 .ctl_name
= KERN_PRINTK_RATELIMIT_BURST
,
662 .procname
= "printk_ratelimit_burst",
663 .data
= &printk_ratelimit_burst
,
664 .maxlen
= sizeof(int),
666 .proc_handler
= &proc_dointvec
,
669 .ctl_name
= KERN_NGROUPS_MAX
,
670 .procname
= "ngroups_max",
671 .data
= &ngroups_max
,
672 .maxlen
= sizeof (int),
674 .proc_handler
= &proc_dointvec
,
676 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
678 .ctl_name
= KERN_UNKNOWN_NMI_PANIC
,
679 .procname
= "unknown_nmi_panic",
680 .data
= &unknown_nmi_panic
,
681 .maxlen
= sizeof (int),
683 .proc_handler
= &proc_dointvec
,
686 .ctl_name
= KERN_NMI_WATCHDOG
,
687 .procname
= "nmi_watchdog",
688 .data
= &nmi_watchdog_enabled
,
689 .maxlen
= sizeof (int),
691 .proc_handler
= &proc_nmi_enabled
,
694 #if defined(CONFIG_X86)
696 .ctl_name
= KERN_PANIC_ON_NMI
,
697 .procname
= "panic_on_unrecovered_nmi",
698 .data
= &panic_on_unrecovered_nmi
,
699 .maxlen
= sizeof(int),
701 .proc_handler
= &proc_dointvec
,
704 .ctl_name
= KERN_BOOTLOADER_TYPE
,
705 .procname
= "bootloader_type",
706 .data
= &bootloader_type
,
707 .maxlen
= sizeof (int),
709 .proc_handler
= &proc_dointvec
,
712 .ctl_name
= CTL_UNNUMBERED
,
713 .procname
= "kstack_depth_to_print",
714 .data
= &kstack_depth_to_print
,
715 .maxlen
= sizeof(int),
717 .proc_handler
= &proc_dointvec
,
720 #if defined(CONFIG_MMU)
722 .ctl_name
= KERN_RANDOMIZE
,
723 .procname
= "randomize_va_space",
724 .data
= &randomize_va_space
,
725 .maxlen
= sizeof(int),
727 .proc_handler
= &proc_dointvec
,
730 #if defined(CONFIG_S390) && defined(CONFIG_SMP)
732 .ctl_name
= KERN_SPIN_RETRY
,
733 .procname
= "spin_retry",
735 .maxlen
= sizeof (int),
737 .proc_handler
= &proc_dointvec
,
740 #ifdef CONFIG_ACPI_SLEEP
742 .ctl_name
= KERN_ACPI_VIDEO_FLAGS
,
743 .procname
= "acpi_video_flags",
744 .data
= &acpi_video_flags
,
745 .maxlen
= sizeof (unsigned long),
747 .proc_handler
= &proc_doulongvec_minmax
,
752 .ctl_name
= KERN_IA64_UNALIGNED
,
753 .procname
= "ignore-unaligned-usertrap",
754 .data
= &no_unaligned_warning
,
755 .maxlen
= sizeof (int),
757 .proc_handler
= &proc_dointvec
,
762 .ctl_name
= KERN_COMPAT_LOG
,
763 .procname
= "compat-log",
765 .maxlen
= sizeof (int),
767 .proc_handler
= &proc_dointvec
,
770 #ifdef CONFIG_RT_MUTEXES
772 .ctl_name
= KERN_MAX_LOCK_DEPTH
,
773 .procname
= "max_lock_depth",
774 .data
= &max_lock_depth
,
775 .maxlen
= sizeof(int),
777 .proc_handler
= &proc_dointvec
,
784 /* Constants for minimum and maximum testing in vm_table.
785 We use these as one-element integer vectors. */
787 static int one_hundred
= 100;
790 static ctl_table vm_table
[] = {
792 .ctl_name
= VM_OVERCOMMIT_MEMORY
,
793 .procname
= "overcommit_memory",
794 .data
= &sysctl_overcommit_memory
,
795 .maxlen
= sizeof(sysctl_overcommit_memory
),
797 .proc_handler
= &proc_dointvec
,
800 .ctl_name
= VM_PANIC_ON_OOM
,
801 .procname
= "panic_on_oom",
802 .data
= &sysctl_panic_on_oom
,
803 .maxlen
= sizeof(sysctl_panic_on_oom
),
805 .proc_handler
= &proc_dointvec
,
808 .ctl_name
= VM_OVERCOMMIT_RATIO
,
809 .procname
= "overcommit_ratio",
810 .data
= &sysctl_overcommit_ratio
,
811 .maxlen
= sizeof(sysctl_overcommit_ratio
),
813 .proc_handler
= &proc_dointvec
,
816 .ctl_name
= VM_PAGE_CLUSTER
,
817 .procname
= "page-cluster",
818 .data
= &page_cluster
,
819 .maxlen
= sizeof(int),
821 .proc_handler
= &proc_dointvec
,
824 .ctl_name
= VM_DIRTY_BACKGROUND
,
825 .procname
= "dirty_background_ratio",
826 .data
= &dirty_background_ratio
,
827 .maxlen
= sizeof(dirty_background_ratio
),
829 .proc_handler
= &proc_dointvec_minmax
,
830 .strategy
= &sysctl_intvec
,
832 .extra2
= &one_hundred
,
835 .ctl_name
= VM_DIRTY_RATIO
,
836 .procname
= "dirty_ratio",
837 .data
= &vm_dirty_ratio
,
838 .maxlen
= sizeof(vm_dirty_ratio
),
840 .proc_handler
= &proc_dointvec_minmax
,
841 .strategy
= &sysctl_intvec
,
843 .extra2
= &one_hundred
,
846 .ctl_name
= VM_DIRTY_WB_CS
,
847 .procname
= "dirty_writeback_centisecs",
848 .data
= &dirty_writeback_interval
,
849 .maxlen
= sizeof(dirty_writeback_interval
),
851 .proc_handler
= &dirty_writeback_centisecs_handler
,
854 .ctl_name
= VM_DIRTY_EXPIRE_CS
,
855 .procname
= "dirty_expire_centisecs",
856 .data
= &dirty_expire_interval
,
857 .maxlen
= sizeof(dirty_expire_interval
),
859 .proc_handler
= &proc_dointvec_userhz_jiffies
,
862 .ctl_name
= VM_NR_PDFLUSH_THREADS
,
863 .procname
= "nr_pdflush_threads",
864 .data
= &nr_pdflush_threads
,
865 .maxlen
= sizeof nr_pdflush_threads
,
866 .mode
= 0444 /* read-only*/,
867 .proc_handler
= &proc_dointvec
,
870 .ctl_name
= VM_SWAPPINESS
,
871 .procname
= "swappiness",
872 .data
= &vm_swappiness
,
873 .maxlen
= sizeof(vm_swappiness
),
875 .proc_handler
= &proc_dointvec_minmax
,
876 .strategy
= &sysctl_intvec
,
878 .extra2
= &one_hundred
,
880 #ifdef CONFIG_HUGETLB_PAGE
882 .ctl_name
= VM_HUGETLB_PAGES
,
883 .procname
= "nr_hugepages",
884 .data
= &max_huge_pages
,
885 .maxlen
= sizeof(unsigned long),
887 .proc_handler
= &hugetlb_sysctl_handler
,
888 .extra1
= (void *)&hugetlb_zero
,
889 .extra2
= (void *)&hugetlb_infinity
,
892 .ctl_name
= VM_HUGETLB_GROUP
,
893 .procname
= "hugetlb_shm_group",
894 .data
= &sysctl_hugetlb_shm_group
,
895 .maxlen
= sizeof(gid_t
),
897 .proc_handler
= &proc_dointvec
,
901 .ctl_name
= VM_LOWMEM_RESERVE_RATIO
,
902 .procname
= "lowmem_reserve_ratio",
903 .data
= &sysctl_lowmem_reserve_ratio
,
904 .maxlen
= sizeof(sysctl_lowmem_reserve_ratio
),
906 .proc_handler
= &lowmem_reserve_ratio_sysctl_handler
,
907 .strategy
= &sysctl_intvec
,
910 .ctl_name
= VM_DROP_PAGECACHE
,
911 .procname
= "drop_caches",
912 .data
= &sysctl_drop_caches
,
913 .maxlen
= sizeof(int),
915 .proc_handler
= drop_caches_sysctl_handler
,
916 .strategy
= &sysctl_intvec
,
919 .ctl_name
= VM_MIN_FREE_KBYTES
,
920 .procname
= "min_free_kbytes",
921 .data
= &min_free_kbytes
,
922 .maxlen
= sizeof(min_free_kbytes
),
924 .proc_handler
= &min_free_kbytes_sysctl_handler
,
925 .strategy
= &sysctl_intvec
,
929 .ctl_name
= VM_PERCPU_PAGELIST_FRACTION
,
930 .procname
= "percpu_pagelist_fraction",
931 .data
= &percpu_pagelist_fraction
,
932 .maxlen
= sizeof(percpu_pagelist_fraction
),
934 .proc_handler
= &percpu_pagelist_fraction_sysctl_handler
,
935 .strategy
= &sysctl_intvec
,
936 .extra1
= &min_percpu_pagelist_fract
,
940 .ctl_name
= VM_MAX_MAP_COUNT
,
941 .procname
= "max_map_count",
942 .data
= &sysctl_max_map_count
,
943 .maxlen
= sizeof(sysctl_max_map_count
),
945 .proc_handler
= &proc_dointvec
949 .ctl_name
= VM_LAPTOP_MODE
,
950 .procname
= "laptop_mode",
951 .data
= &laptop_mode
,
952 .maxlen
= sizeof(laptop_mode
),
954 .proc_handler
= &proc_dointvec_jiffies
,
955 .strategy
= &sysctl_jiffies
,
958 .ctl_name
= VM_BLOCK_DUMP
,
959 .procname
= "block_dump",
961 .maxlen
= sizeof(block_dump
),
963 .proc_handler
= &proc_dointvec
,
964 .strategy
= &sysctl_intvec
,
968 .ctl_name
= VM_VFS_CACHE_PRESSURE
,
969 .procname
= "vfs_cache_pressure",
970 .data
= &sysctl_vfs_cache_pressure
,
971 .maxlen
= sizeof(sysctl_vfs_cache_pressure
),
973 .proc_handler
= &proc_dointvec
,
974 .strategy
= &sysctl_intvec
,
977 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
979 .ctl_name
= VM_LEGACY_VA_LAYOUT
,
980 .procname
= "legacy_va_layout",
981 .data
= &sysctl_legacy_va_layout
,
982 .maxlen
= sizeof(sysctl_legacy_va_layout
),
984 .proc_handler
= &proc_dointvec
,
985 .strategy
= &sysctl_intvec
,
991 .ctl_name
= VM_ZONE_RECLAIM_MODE
,
992 .procname
= "zone_reclaim_mode",
993 .data
= &zone_reclaim_mode
,
994 .maxlen
= sizeof(zone_reclaim_mode
),
996 .proc_handler
= &proc_dointvec
,
997 .strategy
= &sysctl_intvec
,
1001 .ctl_name
= VM_MIN_UNMAPPED
,
1002 .procname
= "min_unmapped_ratio",
1003 .data
= &sysctl_min_unmapped_ratio
,
1004 .maxlen
= sizeof(sysctl_min_unmapped_ratio
),
1006 .proc_handler
= &sysctl_min_unmapped_ratio_sysctl_handler
,
1007 .strategy
= &sysctl_intvec
,
1009 .extra2
= &one_hundred
,
1012 .ctl_name
= VM_MIN_SLAB
,
1013 .procname
= "min_slab_ratio",
1014 .data
= &sysctl_min_slab_ratio
,
1015 .maxlen
= sizeof(sysctl_min_slab_ratio
),
1017 .proc_handler
= &sysctl_min_slab_ratio_sysctl_handler
,
1018 .strategy
= &sysctl_intvec
,
1020 .extra2
= &one_hundred
,
1023 #ifdef CONFIG_X86_32
1025 .ctl_name
= VM_VDSO_ENABLED
,
1026 .procname
= "vdso_enabled",
1027 .data
= &vdso_enabled
,
1028 .maxlen
= sizeof(vdso_enabled
),
1030 .proc_handler
= &proc_dointvec
,
1031 .strategy
= &sysctl_intvec
,
1038 static ctl_table fs_table
[] = {
1040 .ctl_name
= FS_NRINODE
,
1041 .procname
= "inode-nr",
1042 .data
= &inodes_stat
,
1043 .maxlen
= 2*sizeof(int),
1045 .proc_handler
= &proc_dointvec
,
1048 .ctl_name
= FS_STATINODE
,
1049 .procname
= "inode-state",
1050 .data
= &inodes_stat
,
1051 .maxlen
= 7*sizeof(int),
1053 .proc_handler
= &proc_dointvec
,
1056 .ctl_name
= FS_NRFILE
,
1057 .procname
= "file-nr",
1058 .data
= &files_stat
,
1059 .maxlen
= 3*sizeof(int),
1061 .proc_handler
= &proc_nr_files
,
1064 .ctl_name
= FS_MAXFILE
,
1065 .procname
= "file-max",
1066 .data
= &files_stat
.max_files
,
1067 .maxlen
= sizeof(int),
1069 .proc_handler
= &proc_dointvec
,
1072 .ctl_name
= FS_DENTRY
,
1073 .procname
= "dentry-state",
1074 .data
= &dentry_stat
,
1075 .maxlen
= 6*sizeof(int),
1077 .proc_handler
= &proc_dointvec
,
1080 .ctl_name
= FS_OVERFLOWUID
,
1081 .procname
= "overflowuid",
1082 .data
= &fs_overflowuid
,
1083 .maxlen
= sizeof(int),
1085 .proc_handler
= &proc_dointvec_minmax
,
1086 .strategy
= &sysctl_intvec
,
1087 .extra1
= &minolduid
,
1088 .extra2
= &maxolduid
,
1091 .ctl_name
= FS_OVERFLOWGID
,
1092 .procname
= "overflowgid",
1093 .data
= &fs_overflowgid
,
1094 .maxlen
= sizeof(int),
1096 .proc_handler
= &proc_dointvec_minmax
,
1097 .strategy
= &sysctl_intvec
,
1098 .extra1
= &minolduid
,
1099 .extra2
= &maxolduid
,
1102 .ctl_name
= FS_LEASES
,
1103 .procname
= "leases-enable",
1104 .data
= &leases_enable
,
1105 .maxlen
= sizeof(int),
1107 .proc_handler
= &proc_dointvec
,
1109 #ifdef CONFIG_DNOTIFY
1111 .ctl_name
= FS_DIR_NOTIFY
,
1112 .procname
= "dir-notify-enable",
1113 .data
= &dir_notify_enable
,
1114 .maxlen
= sizeof(int),
1116 .proc_handler
= &proc_dointvec
,
1121 .ctl_name
= FS_LEASE_TIME
,
1122 .procname
= "lease-break-time",
1123 .data
= &lease_break_time
,
1124 .maxlen
= sizeof(int),
1126 .proc_handler
= &proc_dointvec
,
1129 .ctl_name
= FS_AIO_NR
,
1130 .procname
= "aio-nr",
1132 .maxlen
= sizeof(aio_nr
),
1134 .proc_handler
= &proc_doulongvec_minmax
,
1137 .ctl_name
= FS_AIO_MAX_NR
,
1138 .procname
= "aio-max-nr",
1139 .data
= &aio_max_nr
,
1140 .maxlen
= sizeof(aio_max_nr
),
1142 .proc_handler
= &proc_doulongvec_minmax
,
1144 #ifdef CONFIG_INOTIFY_USER
1146 .ctl_name
= FS_INOTIFY
,
1147 .procname
= "inotify",
1149 .child
= inotify_table
,
1154 .ctl_name
= KERN_SETUID_DUMPABLE
,
1155 .procname
= "suid_dumpable",
1156 .data
= &suid_dumpable
,
1157 .maxlen
= sizeof(int),
1159 .proc_handler
= &proc_dointvec
,
1164 static ctl_table debug_table
[] = {
1168 static ctl_table dev_table
[] = {
1172 extern void init_irq_proc (void);
1174 static DEFINE_SPINLOCK(sysctl_lock
);
1176 /* called under sysctl_lock */
1177 static int use_table(struct ctl_table_header
*p
)
1179 if (unlikely(p
->unregistering
))
1185 /* called under sysctl_lock */
1186 static void unuse_table(struct ctl_table_header
*p
)
1189 if (unlikely(p
->unregistering
))
1190 complete(p
->unregistering
);
1193 /* called under sysctl_lock, will reacquire if has to wait */
1194 static void start_unregistering(struct ctl_table_header
*p
)
1197 * if p->used is 0, nobody will ever touch that entry again;
1198 * we'll eliminate all paths to it before dropping sysctl_lock
1200 if (unlikely(p
->used
)) {
1201 struct completion wait
;
1202 init_completion(&wait
);
1203 p
->unregistering
= &wait
;
1204 spin_unlock(&sysctl_lock
);
1205 wait_for_completion(&wait
);
1206 spin_lock(&sysctl_lock
);
1209 * do not remove from the list until nobody holds it; walking the
1210 * list in do_sysctl() relies on that.
1212 list_del_init(&p
->ctl_entry
);
1215 void __init
sysctl_init(void)
1217 #ifdef CONFIG_PROC_SYSCTL
1218 register_proc_table(root_table
, proc_sys_root
, &root_table_header
);
1223 #ifdef CONFIG_SYSCTL_SYSCALL
1224 int do_sysctl(int __user
*name
, int nlen
, void __user
*oldval
, size_t __user
*oldlenp
,
1225 void __user
*newval
, size_t newlen
)
1227 struct list_head
*tmp
;
1228 int error
= -ENOTDIR
;
1230 if (nlen
<= 0 || nlen
>= CTL_MAXNAME
)
1234 if (!oldlenp
|| get_user(old_len
, oldlenp
))
1237 spin_lock(&sysctl_lock
);
1238 tmp
= &root_table_header
.ctl_entry
;
1240 struct ctl_table_header
*head
=
1241 list_entry(tmp
, struct ctl_table_header
, ctl_entry
);
1242 void *context
= NULL
;
1244 if (!use_table(head
))
1247 spin_unlock(&sysctl_lock
);
1249 error
= parse_table(name
, nlen
, oldval
, oldlenp
,
1250 newval
, newlen
, head
->ctl_table
,
1254 spin_lock(&sysctl_lock
);
1256 if (error
!= -ENOTDIR
)
1258 } while ((tmp
= tmp
->next
) != &root_table_header
.ctl_entry
);
1259 spin_unlock(&sysctl_lock
);
1263 asmlinkage
long sys_sysctl(struct __sysctl_args __user
*args
)
1265 struct __sysctl_args tmp
;
1268 if (copy_from_user(&tmp
, args
, sizeof(tmp
)))
1272 error
= do_sysctl(tmp
.name
, tmp
.nlen
, tmp
.oldval
, tmp
.oldlenp
,
1273 tmp
.newval
, tmp
.newlen
);
1277 #endif /* CONFIG_SYSCTL_SYSCALL */
1280 * ctl_perm does NOT grant the superuser all rights automatically, because
1281 * some sysctl variables are readonly even to root.
1284 static int test_perm(int mode
, int op
)
1288 else if (in_egroup_p(0))
1290 if ((mode
& op
& 0007) == op
)
1295 static inline int ctl_perm(ctl_table
*table
, int op
)
1298 error
= security_sysctl(table
, op
);
1301 return test_perm(table
->mode
, op
);
1304 #ifdef CONFIG_SYSCTL_SYSCALL
1305 static int parse_table(int __user
*name
, int nlen
,
1306 void __user
*oldval
, size_t __user
*oldlenp
,
1307 void __user
*newval
, size_t newlen
,
1308 ctl_table
*table
, void **context
)
1314 if (get_user(n
, name
))
1316 for ( ; table
->ctl_name
|| table
->procname
; table
++) {
1317 if (!table
->ctl_name
)
1319 if (n
== table
->ctl_name
|| table
->ctl_name
== CTL_ANY
) {
1322 if (ctl_perm(table
, 001))
1324 if (table
->strategy
) {
1325 error
= table
->strategy(
1328 newval
, newlen
, context
);
1334 table
= table
->child
;
1337 error
= do_sysctl_strategy(table
, name
, nlen
,
1339 newval
, newlen
, context
);
1346 /* Perform the actual read/write of a sysctl table entry. */
1347 int do_sysctl_strategy (ctl_table
*table
,
1348 int __user
*name
, int nlen
,
1349 void __user
*oldval
, size_t __user
*oldlenp
,
1350 void __user
*newval
, size_t newlen
, void **context
)
1359 if (ctl_perm(table
, op
))
1362 if (table
->strategy
) {
1363 rc
= table
->strategy(table
, name
, nlen
, oldval
, oldlenp
,
1364 newval
, newlen
, context
);
1371 /* If there is no strategy routine, or if the strategy returns
1372 * zero, proceed with automatic r/w */
1373 if (table
->data
&& table
->maxlen
) {
1374 if (oldval
&& oldlenp
) {
1375 if (get_user(len
, oldlenp
))
1378 if (len
> table
->maxlen
)
1379 len
= table
->maxlen
;
1380 if(copy_to_user(oldval
, table
->data
, len
))
1382 if(put_user(len
, oldlenp
))
1386 if (newval
&& newlen
) {
1388 if (len
> table
->maxlen
)
1389 len
= table
->maxlen
;
1390 if(copy_from_user(table
->data
, newval
, len
))
1396 #endif /* CONFIG_SYSCTL_SYSCALL */
1399 * register_sysctl_table - register a sysctl hierarchy
1400 * @table: the top-level table structure
1401 * @insert_at_head: whether the entry should be inserted in front or at the end
1403 * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1404 * array. An entry with a ctl_name of 0 terminates the table.
1406 * The members of the &ctl_table structure are used as follows:
1408 * ctl_name - This is the numeric sysctl value used by sysctl(2). The number
1409 * must be unique within that level of sysctl
1411 * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not
1412 * enter a sysctl file
1414 * data - a pointer to data for use by proc_handler
1416 * maxlen - the maximum size in bytes of the data
1418 * mode - the file permissions for the /proc/sys file, and for sysctl(2)
1420 * child - a pointer to the child sysctl table if this entry is a directory, or
1423 * proc_handler - the text handler routine (described below)
1425 * strategy - the strategy routine (described below)
1427 * de - for internal use by the sysctl routines
1429 * extra1, extra2 - extra pointers usable by the proc handler routines
1431 * Leaf nodes in the sysctl tree will be represented by a single file
1432 * under /proc; non-leaf nodes will be represented by directories.
1434 * sysctl(2) can automatically manage read and write requests through
1435 * the sysctl table. The data and maxlen fields of the ctl_table
1436 * struct enable minimal validation of the values being written to be
1437 * performed, and the mode field allows minimal authentication.
1439 * More sophisticated management can be enabled by the provision of a
1440 * strategy routine with the table entry. This will be called before
1441 * any automatic read or write of the data is performed.
1443 * The strategy routine may return
1445 * < 0 - Error occurred (error is passed to user process)
1447 * 0 - OK - proceed with automatic read or write.
1449 * > 0 - OK - read or write has been done by the strategy routine, so
1450 * return immediately.
1452 * There must be a proc_handler routine for any terminal nodes
1453 * mirrored under /proc/sys (non-terminals are handled by a built-in
1454 * directory handler). Several default handlers are available to
1455 * cover common cases -
1457 * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(),
1458 * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(),
1459 * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax()
1461 * It is the handler's job to read the input buffer from user memory
1462 * and process it. The handler should return 0 on success.
1464 * This routine returns %NULL on a failure to register, and a pointer
1465 * to the table header on success.
1467 struct ctl_table_header
*register_sysctl_table(ctl_table
* table
,
1470 struct ctl_table_header
*tmp
;
1471 tmp
= kmalloc(sizeof(struct ctl_table_header
), GFP_KERNEL
);
1474 tmp
->ctl_table
= table
;
1475 INIT_LIST_HEAD(&tmp
->ctl_entry
);
1477 tmp
->unregistering
= NULL
;
1478 spin_lock(&sysctl_lock
);
1480 list_add(&tmp
->ctl_entry
, &root_table_header
.ctl_entry
);
1482 list_add_tail(&tmp
->ctl_entry
, &root_table_header
.ctl_entry
);
1483 spin_unlock(&sysctl_lock
);
1484 #ifdef CONFIG_PROC_SYSCTL
1485 register_proc_table(table
, proc_sys_root
, tmp
);
1491 * unregister_sysctl_table - unregister a sysctl table hierarchy
1492 * @header: the header returned from register_sysctl_table
1494 * Unregisters the sysctl table and all children. proc entries may not
1495 * actually be removed until they are no longer used by anyone.
1497 void unregister_sysctl_table(struct ctl_table_header
* header
)
1500 spin_lock(&sysctl_lock
);
1501 start_unregistering(header
);
1502 #ifdef CONFIG_PROC_SYSCTL
1503 unregister_proc_table(header
->ctl_table
, proc_sys_root
);
1505 spin_unlock(&sysctl_lock
);
1509 #else /* !CONFIG_SYSCTL */
1510 struct ctl_table_header
* register_sysctl_table(ctl_table
* table
,
1516 void unregister_sysctl_table(struct ctl_table_header
* table
)
1520 #endif /* CONFIG_SYSCTL */
1526 #ifdef CONFIG_PROC_SYSCTL
1528 /* Scan the sysctl entries in table and add them all into /proc */
1529 static void register_proc_table(ctl_table
* table
, struct proc_dir_entry
*root
, void *set
)
1531 struct proc_dir_entry
*de
;
1535 for (; table
->ctl_name
|| table
->procname
; table
++) {
1536 /* Can't do anything without a proc name. */
1537 if (!table
->procname
)
1539 /* Maybe we can't do anything with it... */
1540 if (!table
->proc_handler
&& !table
->child
) {
1541 printk(KERN_WARNING
"SYSCTL: Can't register %s\n",
1546 len
= strlen(table
->procname
);
1550 if (table
->proc_handler
)
1554 for (de
= root
->subdir
; de
; de
= de
->next
) {
1555 if (proc_match(len
, table
->procname
, de
))
1558 /* If the subdir exists already, de is non-NULL */
1562 de
= create_proc_entry(table
->procname
, mode
, root
);
1566 de
->data
= (void *) table
;
1567 if (table
->proc_handler
)
1568 de
->proc_fops
= &proc_sys_file_operations
;
1571 if (de
->mode
& S_IFDIR
)
1572 register_proc_table(table
->child
, de
, set
);
1577 * Unregister a /proc sysctl table and any subdirectories.
1579 static void unregister_proc_table(ctl_table
* table
, struct proc_dir_entry
*root
)
1581 struct proc_dir_entry
*de
;
1582 for (; table
->ctl_name
|| table
->procname
; table
++) {
1583 if (!(de
= table
->de
))
1585 if (de
->mode
& S_IFDIR
) {
1586 if (!table
->child
) {
1587 printk (KERN_ALERT
"Help - malformed sysctl tree on free\n");
1590 unregister_proc_table(table
->child
, de
);
1592 /* Don't unregister directories which still have entries.. */
1598 * In any case, mark the entry as goner; we'll keep it
1599 * around if it's busy, but we'll know to do nothing with
1600 * its fields. We are under sysctl_lock here.
1604 /* Don't unregister proc entries that are still being used.. */
1605 if (atomic_read(&de
->count
))
1609 remove_proc_entry(table
->procname
, root
);
1613 static ssize_t
do_rw_proc(int write
, struct file
* file
, char __user
* buf
,
1614 size_t count
, loff_t
*ppos
)
1617 struct proc_dir_entry
*de
= PDE(file
->f_dentry
->d_inode
);
1618 struct ctl_table
*table
;
1620 ssize_t error
= -ENOTDIR
;
1622 spin_lock(&sysctl_lock
);
1623 if (de
&& de
->data
&& use_table(de
->set
)) {
1625 * at that point we know that sysctl was not unregistered
1626 * and won't be until we finish
1628 spin_unlock(&sysctl_lock
);
1629 table
= (struct ctl_table
*) de
->data
;
1630 if (!table
|| !table
->proc_handler
)
1633 op
= (write
? 002 : 004);
1634 if (ctl_perm(table
, op
))
1637 /* careful: calling conventions are nasty here */
1639 error
= (*table
->proc_handler
)(table
, write
, file
,
1644 spin_lock(&sysctl_lock
);
1645 unuse_table(de
->set
);
1647 spin_unlock(&sysctl_lock
);
1651 static int proc_opensys(struct inode
*inode
, struct file
*file
)
1653 if (file
->f_mode
& FMODE_WRITE
) {
1655 * sysctl entries that are not writable,
1656 * are _NOT_ writable, capabilities or not.
1658 if (!(inode
->i_mode
& S_IWUSR
))
1665 static ssize_t
proc_readsys(struct file
* file
, char __user
* buf
,
1666 size_t count
, loff_t
*ppos
)
1668 return do_rw_proc(0, file
, buf
, count
, ppos
);
1671 static ssize_t
proc_writesys(struct file
* file
, const char __user
* buf
,
1672 size_t count
, loff_t
*ppos
)
1674 return do_rw_proc(1, file
, (char __user
*) buf
, count
, ppos
);
1677 static int _proc_do_string(void* data
, int maxlen
, int write
,
1678 struct file
*filp
, void __user
*buffer
,
1679 size_t *lenp
, loff_t
*ppos
)
1685 if (!data
|| !maxlen
|| !*lenp
||
1686 (*ppos
&& !write
)) {
1694 while (len
< *lenp
) {
1695 if (get_user(c
, p
++))
1697 if (c
== 0 || c
== '\n')
1703 if(copy_from_user(data
, buffer
, len
))
1705 ((char *) data
)[len
] = 0;
1714 if(copy_to_user(buffer
, data
, len
))
1717 if(put_user('\n', ((char __user
*) buffer
) + len
))
1728 * proc_dostring - read a string sysctl
1729 * @table: the sysctl table
1730 * @write: %TRUE if this is a write to the sysctl file
1731 * @filp: the file structure
1732 * @buffer: the user buffer
1733 * @lenp: the size of the user buffer
1734 * @ppos: file position
1736 * Reads/writes a string from/to the user buffer. If the kernel
1737 * buffer provided is not large enough to hold the string, the
1738 * string is truncated. The copied string is %NULL-terminated.
1739 * If the string is being read by the user process, it is copied
1740 * and a newline '\n' is added. It is truncated if the buffer is
1743 * Returns 0 on success.
1745 int proc_dostring(ctl_table
*table
, int write
, struct file
*filp
,
1746 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1748 return _proc_do_string(table
->data
, table
->maxlen
, write
, filp
,
1749 buffer
, lenp
, ppos
);
1753 * Special case of dostring for the UTS structure. This has locks
1754 * to observe. Should this be in kernel/sys.c ????
1757 #ifndef CONFIG_UTS_NS
1758 static int proc_do_uts_string(ctl_table
*table
, int write
, struct file
*filp
,
1759 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1764 down_read(&uts_sem
);
1765 r
=proc_dostring(table
,0,filp
,buffer
,lenp
, ppos
);
1768 down_write(&uts_sem
);
1769 r
=proc_dostring(table
,1,filp
,buffer
,lenp
, ppos
);
1774 #else /* !CONFIG_UTS_NS */
1775 static int proc_do_uts_string(ctl_table
*table
, int write
, struct file
*filp
,
1776 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1779 struct uts_namespace
* uts_ns
= current
->nsproxy
->uts_ns
;
1782 switch (table
->ctl_name
) {
1784 which
= uts_ns
->name
.sysname
;
1787 which
= uts_ns
->name
.nodename
;
1789 case KERN_OSRELEASE
:
1790 which
= uts_ns
->name
.release
;
1793 which
= uts_ns
->name
.version
;
1795 case KERN_DOMAINNAME
:
1796 which
= uts_ns
->name
.domainname
;
1804 down_read(&uts_sem
);
1805 r
=_proc_do_string(which
,table
->maxlen
,0,filp
,buffer
,lenp
, ppos
);
1808 down_write(&uts_sem
);
1809 r
=_proc_do_string(which
,table
->maxlen
,1,filp
,buffer
,lenp
, ppos
);
1815 #endif /* !CONFIG_UTS_NS */
1817 static int do_proc_dointvec_conv(int *negp
, unsigned long *lvalp
,
1819 int write
, void *data
)
1822 *valp
= *negp
? -*lvalp
: *lvalp
;
1827 *lvalp
= (unsigned long)-val
;
1830 *lvalp
= (unsigned long)val
;
1836 static int __do_proc_dointvec(void *tbl_data
, ctl_table
*table
,
1837 int write
, struct file
*filp
, void __user
*buffer
,
1838 size_t *lenp
, loff_t
*ppos
,
1839 int (*conv
)(int *negp
, unsigned long *lvalp
, int *valp
,
1840 int write
, void *data
),
1843 #define TMPBUFLEN 21
1844 int *i
, vleft
, first
=1, neg
, val
;
1848 char buf
[TMPBUFLEN
], *p
;
1849 char __user
*s
= buffer
;
1851 if (!tbl_data
|| !table
->maxlen
|| !*lenp
||
1852 (*ppos
&& !write
)) {
1857 i
= (int *) tbl_data
;
1858 vleft
= table
->maxlen
/ sizeof(*i
);
1862 conv
= do_proc_dointvec_conv
;
1864 for (; left
&& vleft
--; i
++, first
=0) {
1879 if (len
> sizeof(buf
) - 1)
1880 len
= sizeof(buf
) - 1;
1881 if (copy_from_user(buf
, s
, len
))
1885 if (*p
== '-' && left
> 1) {
1889 if (*p
< '0' || *p
> '9')
1892 lval
= simple_strtoul(p
, &p
, 0);
1895 if ((len
< left
) && *p
&& !isspace(*p
))
1902 if (conv(&neg
, &lval
, i
, 1, data
))
1909 if (conv(&neg
, &lval
, i
, 0, data
))
1912 sprintf(p
, "%s%lu", neg
? "-" : "", lval
);
1916 if(copy_to_user(s
, buf
, len
))
1923 if (!write
&& !first
&& left
) {
1924 if(put_user('\n', s
))
1931 if (get_user(c
, s
++))
1946 static int do_proc_dointvec(ctl_table
*table
, int write
, struct file
*filp
,
1947 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
,
1948 int (*conv
)(int *negp
, unsigned long *lvalp
, int *valp
,
1949 int write
, void *data
),
1952 return __do_proc_dointvec(table
->data
, table
, write
, filp
,
1953 buffer
, lenp
, ppos
, conv
, data
);
1957 * proc_dointvec - read a vector of integers
1958 * @table: the sysctl table
1959 * @write: %TRUE if this is a write to the sysctl file
1960 * @filp: the file structure
1961 * @buffer: the user buffer
1962 * @lenp: the size of the user buffer
1963 * @ppos: file position
1965 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
1966 * values from/to the user buffer, treated as an ASCII string.
1968 * Returns 0 on success.
1970 int proc_dointvec(ctl_table
*table
, int write
, struct file
*filp
,
1971 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1973 return do_proc_dointvec(table
,write
,filp
,buffer
,lenp
,ppos
,
1983 static int do_proc_dointvec_bset_conv(int *negp
, unsigned long *lvalp
,
1985 int write
, void *data
)
1987 int op
= *(int *)data
;
1989 int val
= *negp
? -*lvalp
: *lvalp
;
1991 case OP_SET
: *valp
= val
; break;
1992 case OP_AND
: *valp
&= val
; break;
1993 case OP_OR
: *valp
|= val
; break;
1994 case OP_MAX
: if(*valp
< val
)
1997 case OP_MIN
: if(*valp
> val
)
2005 *lvalp
= (unsigned long)-val
;
2008 *lvalp
= (unsigned long)val
;
2015 * init may raise the set.
2018 int proc_dointvec_bset(ctl_table
*table
, int write
, struct file
*filp
,
2019 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2023 if (!capable(CAP_SYS_MODULE
)) {
2027 op
= is_init(current
) ? OP_SET
: OP_AND
;
2028 return do_proc_dointvec(table
,write
,filp
,buffer
,lenp
,ppos
,
2029 do_proc_dointvec_bset_conv
,&op
);
2032 struct do_proc_dointvec_minmax_conv_param
{
2037 static int do_proc_dointvec_minmax_conv(int *negp
, unsigned long *lvalp
,
2039 int write
, void *data
)
2041 struct do_proc_dointvec_minmax_conv_param
*param
= data
;
2043 int val
= *negp
? -*lvalp
: *lvalp
;
2044 if ((param
->min
&& *param
->min
> val
) ||
2045 (param
->max
&& *param
->max
< val
))
2052 *lvalp
= (unsigned long)-val
;
2055 *lvalp
= (unsigned long)val
;
2062 * proc_dointvec_minmax - read a vector of integers with min/max values
2063 * @table: the sysctl table
2064 * @write: %TRUE if this is a write to the sysctl file
2065 * @filp: the file structure
2066 * @buffer: the user buffer
2067 * @lenp: the size of the user buffer
2068 * @ppos: file position
2070 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2071 * values from/to the user buffer, treated as an ASCII string.
2073 * This routine will ensure the values are within the range specified by
2074 * table->extra1 (min) and table->extra2 (max).
2076 * Returns 0 on success.
2078 int proc_dointvec_minmax(ctl_table
*table
, int write
, struct file
*filp
,
2079 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2081 struct do_proc_dointvec_minmax_conv_param param
= {
2082 .min
= (int *) table
->extra1
,
2083 .max
= (int *) table
->extra2
,
2085 return do_proc_dointvec(table
, write
, filp
, buffer
, lenp
, ppos
,
2086 do_proc_dointvec_minmax_conv
, ¶m
);
2089 static int __do_proc_doulongvec_minmax(void *data
, ctl_table
*table
, int write
,
2091 void __user
*buffer
,
2092 size_t *lenp
, loff_t
*ppos
,
2093 unsigned long convmul
,
2094 unsigned long convdiv
)
2096 #define TMPBUFLEN 21
2097 unsigned long *i
, *min
, *max
, val
;
2098 int vleft
, first
=1, neg
;
2100 char buf
[TMPBUFLEN
], *p
;
2101 char __user
*s
= buffer
;
2103 if (!data
|| !table
->maxlen
|| !*lenp
||
2104 (*ppos
&& !write
)) {
2109 i
= (unsigned long *) data
;
2110 min
= (unsigned long *) table
->extra1
;
2111 max
= (unsigned long *) table
->extra2
;
2112 vleft
= table
->maxlen
/ sizeof(unsigned long);
2115 for (; left
&& vleft
--; i
++, min
++, max
++, first
=0) {
2130 if (len
> TMPBUFLEN
-1)
2132 if (copy_from_user(buf
, s
, len
))
2136 if (*p
== '-' && left
> 1) {
2140 if (*p
< '0' || *p
> '9')
2142 val
= simple_strtoul(p
, &p
, 0) * convmul
/ convdiv
;
2144 if ((len
< left
) && *p
&& !isspace(*p
))
2153 if ((min
&& val
< *min
) || (max
&& val
> *max
))
2160 sprintf(p
, "%lu", convdiv
* (*i
) / convmul
);
2164 if(copy_to_user(s
, buf
, len
))
2171 if (!write
&& !first
&& left
) {
2172 if(put_user('\n', s
))
2179 if (get_user(c
, s
++))
2194 static int do_proc_doulongvec_minmax(ctl_table
*table
, int write
,
2196 void __user
*buffer
,
2197 size_t *lenp
, loff_t
*ppos
,
2198 unsigned long convmul
,
2199 unsigned long convdiv
)
2201 return __do_proc_doulongvec_minmax(table
->data
, table
, write
,
2202 filp
, buffer
, lenp
, ppos
, convmul
, convdiv
);
2206 * proc_doulongvec_minmax - read a vector of long integers with min/max values
2207 * @table: the sysctl table
2208 * @write: %TRUE if this is a write to the sysctl file
2209 * @filp: the file structure
2210 * @buffer: the user buffer
2211 * @lenp: the size of the user buffer
2212 * @ppos: file position
2214 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2215 * values from/to the user buffer, treated as an ASCII string.
2217 * This routine will ensure the values are within the range specified by
2218 * table->extra1 (min) and table->extra2 (max).
2220 * Returns 0 on success.
2222 int proc_doulongvec_minmax(ctl_table
*table
, int write
, struct file
*filp
,
2223 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2225 return do_proc_doulongvec_minmax(table
, write
, filp
, buffer
, lenp
, ppos
, 1l, 1l);
2229 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
2230 * @table: the sysctl table
2231 * @write: %TRUE if this is a write to the sysctl file
2232 * @filp: the file structure
2233 * @buffer: the user buffer
2234 * @lenp: the size of the user buffer
2235 * @ppos: file position
2237 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2238 * values from/to the user buffer, treated as an ASCII string. The values
2239 * are treated as milliseconds, and converted to jiffies when they are stored.
2241 * This routine will ensure the values are within the range specified by
2242 * table->extra1 (min) and table->extra2 (max).
2244 * Returns 0 on success.
2246 int proc_doulongvec_ms_jiffies_minmax(ctl_table
*table
, int write
,
2248 void __user
*buffer
,
2249 size_t *lenp
, loff_t
*ppos
)
2251 return do_proc_doulongvec_minmax(table
, write
, filp
, buffer
,
2252 lenp
, ppos
, HZ
, 1000l);
2256 static int do_proc_dointvec_jiffies_conv(int *negp
, unsigned long *lvalp
,
2258 int write
, void *data
)
2261 if (*lvalp
> LONG_MAX
/ HZ
)
2263 *valp
= *negp
? -(*lvalp
*HZ
) : (*lvalp
*HZ
);
2269 lval
= (unsigned long)-val
;
2272 lval
= (unsigned long)val
;
2279 static int do_proc_dointvec_userhz_jiffies_conv(int *negp
, unsigned long *lvalp
,
2281 int write
, void *data
)
2284 if (USER_HZ
< HZ
&& *lvalp
> (LONG_MAX
/ HZ
) * USER_HZ
)
2286 *valp
= clock_t_to_jiffies(*negp
? -*lvalp
: *lvalp
);
2292 lval
= (unsigned long)-val
;
2295 lval
= (unsigned long)val
;
2297 *lvalp
= jiffies_to_clock_t(lval
);
2302 static int do_proc_dointvec_ms_jiffies_conv(int *negp
, unsigned long *lvalp
,
2304 int write
, void *data
)
2307 *valp
= msecs_to_jiffies(*negp
? -*lvalp
: *lvalp
);
2313 lval
= (unsigned long)-val
;
2316 lval
= (unsigned long)val
;
2318 *lvalp
= jiffies_to_msecs(lval
);
2324 * proc_dointvec_jiffies - read a vector of integers as seconds
2325 * @table: the sysctl table
2326 * @write: %TRUE if this is a write to the sysctl file
2327 * @filp: the file structure
2328 * @buffer: the user buffer
2329 * @lenp: the size of the user buffer
2330 * @ppos: file position
2332 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2333 * values from/to the user buffer, treated as an ASCII string.
2334 * The values read are assumed to be in seconds, and are converted into
2337 * Returns 0 on success.
2339 int proc_dointvec_jiffies(ctl_table
*table
, int write
, struct file
*filp
,
2340 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2342 return do_proc_dointvec(table
,write
,filp
,buffer
,lenp
,ppos
,
2343 do_proc_dointvec_jiffies_conv
,NULL
);
2347 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
2348 * @table: the sysctl table
2349 * @write: %TRUE if this is a write to the sysctl file
2350 * @filp: the file structure
2351 * @buffer: the user buffer
2352 * @lenp: the size of the user buffer
2353 * @ppos: pointer to the file position
2355 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2356 * values from/to the user buffer, treated as an ASCII string.
2357 * The values read are assumed to be in 1/USER_HZ seconds, and
2358 * are converted into jiffies.
2360 * Returns 0 on success.
2362 int proc_dointvec_userhz_jiffies(ctl_table
*table
, int write
, struct file
*filp
,
2363 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2365 return do_proc_dointvec(table
,write
,filp
,buffer
,lenp
,ppos
,
2366 do_proc_dointvec_userhz_jiffies_conv
,NULL
);
2370 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
2371 * @table: the sysctl table
2372 * @write: %TRUE if this is a write to the sysctl file
2373 * @filp: the file structure
2374 * @buffer: the user buffer
2375 * @lenp: the size of the user buffer
2376 * @ppos: file position
2377 * @ppos: the current position in the file
2379 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2380 * values from/to the user buffer, treated as an ASCII string.
2381 * The values read are assumed to be in 1/1000 seconds, and
2382 * are converted into jiffies.
2384 * Returns 0 on success.
2386 int proc_dointvec_ms_jiffies(ctl_table
*table
, int write
, struct file
*filp
,
2387 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2389 return do_proc_dointvec(table
, write
, filp
, buffer
, lenp
, ppos
,
2390 do_proc_dointvec_ms_jiffies_conv
, NULL
);
2393 #ifdef CONFIG_SYSVIPC
2394 static int proc_do_ipc_string(ctl_table
*table
, int write
, struct file
*filp
,
2395 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2398 struct ipc_namespace
*ns
;
2400 ns
= current
->nsproxy
->ipc_ns
;
2402 switch (table
->ctl_name
) {
2404 data
= &ns
->shm_ctlmax
;
2407 data
= &ns
->shm_ctlall
;
2410 data
= &ns
->shm_ctlmni
;
2413 data
= &ns
->msg_ctlmax
;
2416 data
= &ns
->msg_ctlmni
;
2419 data
= &ns
->msg_ctlmnb
;
2422 data
= &ns
->sem_ctls
;
2428 return __do_proc_dointvec(data
, table
, write
, filp
, buffer
,
2429 lenp
, ppos
, NULL
, NULL
);
2431 return __do_proc_doulongvec_minmax(data
, table
, write
, filp
, buffer
,
2432 lenp
, ppos
, 1l, 1l);
2436 static int proc_do_cad_pid(ctl_table
*table
, int write
, struct file
*filp
,
2437 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2439 struct pid
*new_pid
;
2443 tmp
= pid_nr(cad_pid
);
2445 r
= __do_proc_dointvec(&tmp
, table
, write
, filp
, buffer
,
2446 lenp
, ppos
, NULL
, NULL
);
2450 new_pid
= find_get_pid(tmp
);
2454 put_pid(xchg(&cad_pid
, new_pid
));
2458 #else /* CONFIG_PROC_FS */
2460 int proc_dostring(ctl_table
*table
, int write
, struct file
*filp
,
2461 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2466 static int proc_do_uts_string(ctl_table
*table
, int write
, struct file
*filp
,
2467 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2472 #ifdef CONFIG_SYSVIPC
2473 static int proc_do_ipc_string(ctl_table
*table
, int write
, struct file
*filp
,
2474 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2480 int proc_dointvec(ctl_table
*table
, int write
, struct file
*filp
,
2481 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2486 int proc_dointvec_bset(ctl_table
*table
, int write
, struct file
*filp
,
2487 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2492 int proc_dointvec_minmax(ctl_table
*table
, int write
, struct file
*filp
,
2493 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2498 int proc_dointvec_jiffies(ctl_table
*table
, int write
, struct file
*filp
,
2499 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2504 int proc_dointvec_userhz_jiffies(ctl_table
*table
, int write
, struct file
*filp
,
2505 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2510 int proc_dointvec_ms_jiffies(ctl_table
*table
, int write
, struct file
*filp
,
2511 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2516 int proc_doulongvec_minmax(ctl_table
*table
, int write
, struct file
*filp
,
2517 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2522 int proc_doulongvec_ms_jiffies_minmax(ctl_table
*table
, int write
,
2524 void __user
*buffer
,
2525 size_t *lenp
, loff_t
*ppos
)
2531 #endif /* CONFIG_PROC_FS */
2534 #ifdef CONFIG_SYSCTL_SYSCALL
2536 * General sysctl support routines
2539 /* The generic string strategy routine: */
2540 int sysctl_string(ctl_table
*table
, int __user
*name
, int nlen
,
2541 void __user
*oldval
, size_t __user
*oldlenp
,
2542 void __user
*newval
, size_t newlen
, void **context
)
2544 if (!table
->data
|| !table
->maxlen
)
2547 if (oldval
&& oldlenp
) {
2549 if (get_user(bufsize
, oldlenp
))
2552 size_t len
= strlen(table
->data
), copied
;
2554 /* This shouldn't trigger for a well-formed sysctl */
2555 if (len
> table
->maxlen
)
2556 len
= table
->maxlen
;
2558 /* Copy up to a max of bufsize-1 bytes of the string */
2559 copied
= (len
>= bufsize
) ? bufsize
- 1 : len
;
2561 if (copy_to_user(oldval
, table
->data
, copied
) ||
2562 put_user(0, (char __user
*)(oldval
+ copied
)))
2564 if (put_user(len
, oldlenp
))
2568 if (newval
&& newlen
) {
2569 size_t len
= newlen
;
2570 if (len
> table
->maxlen
)
2571 len
= table
->maxlen
;
2572 if(copy_from_user(table
->data
, newval
, len
))
2574 if (len
== table
->maxlen
)
2576 ((char *) table
->data
)[len
] = 0;
2582 * This function makes sure that all of the integers in the vector
2583 * are between the minimum and maximum values given in the arrays
2584 * table->extra1 and table->extra2, respectively.
2586 int sysctl_intvec(ctl_table
*table
, int __user
*name
, int nlen
,
2587 void __user
*oldval
, size_t __user
*oldlenp
,
2588 void __user
*newval
, size_t newlen
, void **context
)
2591 if (newval
&& newlen
) {
2592 int __user
*vec
= (int __user
*) newval
;
2593 int *min
= (int *) table
->extra1
;
2594 int *max
= (int *) table
->extra2
;
2598 if (newlen
% sizeof(int) != 0)
2601 if (!table
->extra1
&& !table
->extra2
)
2604 if (newlen
> table
->maxlen
)
2605 newlen
= table
->maxlen
;
2606 length
= newlen
/ sizeof(int);
2608 for (i
= 0; i
< length
; i
++) {
2610 if (get_user(value
, vec
+ i
))
2612 if (min
&& value
< min
[i
])
2614 if (max
&& value
> max
[i
])
2621 /* Strategy function to convert jiffies to seconds */
2622 int sysctl_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(*(int *)(table
->data
)/HZ
, (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
) = new*HZ
;
2649 /* Strategy function to convert jiffies to seconds */
2650 int sysctl_ms_jiffies(ctl_table
*table
, int __user
*name
, int nlen
,
2651 void __user
*oldval
, size_t __user
*oldlenp
,
2652 void __user
*newval
, size_t newlen
, void **context
)
2657 if (get_user(olen
, oldlenp
))
2659 if (olen
!=sizeof(int))
2662 if (put_user(jiffies_to_msecs(*(int *)(table
->data
)), (int __user
*)oldval
) ||
2663 (oldlenp
&& put_user(sizeof(int),oldlenp
)))
2666 if (newval
&& newlen
) {
2668 if (newlen
!= sizeof(int))
2670 if (get_user(new, (int __user
*)newval
))
2672 *(int *)(table
->data
) = msecs_to_jiffies(new);
2677 #else /* CONFIG_SYSCTL_SYSCALL */
2680 asmlinkage
long sys_sysctl(struct __sysctl_args __user
*args
)
2682 static int msg_count
;
2683 struct __sysctl_args tmp
;
2684 int name
[CTL_MAXNAME
];
2687 /* Read in the sysctl name for better debug message logging */
2688 if (copy_from_user(&tmp
, args
, sizeof(tmp
)))
2690 if (tmp
.nlen
<= 0 || tmp
.nlen
>= CTL_MAXNAME
)
2692 for (i
= 0; i
< tmp
.nlen
; i
++)
2693 if (get_user(name
[i
], tmp
.name
+ i
))
2696 /* Ignore accesses to kernel.version */
2697 if ((tmp
.nlen
== 2) && (name
[0] == CTL_KERN
) && (name
[1] == KERN_VERSION
))
2700 if (msg_count
< 5) {
2703 "warning: process `%s' used the removed sysctl "
2704 "system call with ", current
->comm
);
2705 for (i
= 0; i
< tmp
.nlen
; i
++)
2706 printk("%d.", name
[i
]);
2713 int sysctl_string(ctl_table
*table
, int __user
*name
, int nlen
,
2714 void __user
*oldval
, size_t __user
*oldlenp
,
2715 void __user
*newval
, size_t newlen
, void **context
)
2720 int sysctl_intvec(ctl_table
*table
, int __user
*name
, int nlen
,
2721 void __user
*oldval
, size_t __user
*oldlenp
,
2722 void __user
*newval
, size_t newlen
, void **context
)
2727 int sysctl_jiffies(ctl_table
*table
, int __user
*name
, int nlen
,
2728 void __user
*oldval
, size_t __user
*oldlenp
,
2729 void __user
*newval
, size_t newlen
, void **context
)
2734 int sysctl_ms_jiffies(ctl_table
*table
, int __user
*name
, int nlen
,
2735 void __user
*oldval
, size_t __user
*oldlenp
,
2736 void __user
*newval
, size_t newlen
, void **context
)
2741 #endif /* CONFIG_SYSCTL_SYSCALL */
2744 * No sense putting this after each symbol definition, twice,
2745 * exception granted :-)
2747 EXPORT_SYMBOL(proc_dointvec
);
2748 EXPORT_SYMBOL(proc_dointvec_jiffies
);
2749 EXPORT_SYMBOL(proc_dointvec_minmax
);
2750 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies
);
2751 EXPORT_SYMBOL(proc_dointvec_ms_jiffies
);
2752 EXPORT_SYMBOL(proc_dostring
);
2753 EXPORT_SYMBOL(proc_doulongvec_minmax
);
2754 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax
);
2755 EXPORT_SYMBOL(register_sysctl_table
);
2756 EXPORT_SYMBOL(sysctl_intvec
);
2757 EXPORT_SYMBOL(sysctl_jiffies
);
2758 EXPORT_SYMBOL(sysctl_ms_jiffies
);
2759 EXPORT_SYMBOL(sysctl_string
);
2760 EXPORT_SYMBOL(unregister_sysctl_table
);