Merge branch 'linus' into tracing/ftrace
[linux-2.6] / kernel / sysctl.c
1 /*
2  * sysctl.c: General linux system control interface
3  *
4  * Begun 24 March 1995, Stephen Tweedie
5  * Added /proc support, Dec 1995
6  * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas.
7  * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver.
8  * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver.
9  * Dynamic registration fixes, Stephen Tweedie.
10  * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn.
11  * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris
12  *  Horn.
13  * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer.
14  * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer.
15  * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill
16  *  Wendling.
17  * The list_for_each() macro wasn't appropriate for the sysctl loop.
18  *  Removed it and replaced it with older style, 03/23/00, Bill Wendling
19  */
20
21 #include <linux/module.h>
22 #include <linux/mm.h>
23 #include <linux/swap.h>
24 #include <linux/slab.h>
25 #include <linux/sysctl.h>
26 #include <linux/proc_fs.h>
27 #include <linux/security.h>
28 #include <linux/ctype.h>
29 #include <linux/utsname.h>
30 #include <linux/smp_lock.h>
31 #include <linux/fs.h>
32 #include <linux/init.h>
33 #include <linux/kernel.h>
34 #include <linux/kobject.h>
35 #include <linux/net.h>
36 #include <linux/sysrq.h>
37 #include <linux/highuid.h>
38 #include <linux/writeback.h>
39 #include <linux/hugetlb.h>
40 #include <linux/initrd.h>
41 #include <linux/key.h>
42 #include <linux/times.h>
43 #include <linux/limits.h>
44 #include <linux/dcache.h>
45 #include <linux/syscalls.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/acpi.h>
48 #include <linux/reboot.h>
49 #include <linux/ftrace.h>
50
51 #include <asm/uaccess.h>
52 #include <asm/processor.h>
53
54 #ifdef CONFIG_X86
55 #include <asm/nmi.h>
56 #include <asm/stacktrace.h>
57 #include <asm/io.h>
58 #endif
59
60 static int deprecated_sysctl_warning(struct __sysctl_args *args);
61
62 #if defined(CONFIG_SYSCTL)
63
64 /* External variables not in a header file. */
65 extern int C_A_D;
66 extern int print_fatal_signals;
67 extern int sysctl_overcommit_memory;
68 extern int sysctl_overcommit_ratio;
69 extern int sysctl_panic_on_oom;
70 extern int sysctl_oom_kill_allocating_task;
71 extern int sysctl_oom_dump_tasks;
72 extern int max_threads;
73 extern int core_uses_pid;
74 extern int suid_dumpable;
75 extern char core_pattern[];
76 extern int pid_max;
77 extern int min_free_kbytes;
78 extern int pid_max_min, pid_max_max;
79 extern int sysctl_drop_caches;
80 extern int percpu_pagelist_fraction;
81 extern int compat_log;
82 extern int maps_protect;
83 extern int sysctl_stat_interval;
84 extern int latencytop_enabled;
85 extern int sysctl_nr_open_min, sysctl_nr_open_max;
86
87 /* Constants used for minimum and  maximum */
88 #if defined(CONFIG_DETECT_SOFTLOCKUP) || defined(CONFIG_HIGHMEM)
89 static int one = 1;
90 #endif
91
92 #ifdef CONFIG_DETECT_SOFTLOCKUP
93 static int sixty = 60;
94 #endif
95
96 #ifdef CONFIG_MMU
97 static int two = 2;
98 #endif
99
100 static int zero;
101 static int one_hundred = 100;
102
103 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
104 static int maxolduid = 65535;
105 static int minolduid;
106 static int min_percpu_pagelist_fract = 8;
107
108 static int ngroups_max = NGROUPS_MAX;
109
110 #ifdef CONFIG_KMOD
111 extern char modprobe_path[];
112 #endif
113 #ifdef CONFIG_CHR_DEV_SG
114 extern int sg_big_buff;
115 #endif
116
117 #ifdef __sparc__
118 extern char reboot_command [];
119 extern int stop_a_enabled;
120 extern int scons_pwroff;
121 #endif
122
123 #ifdef __hppa__
124 extern int pwrsw_enabled;
125 extern int unaligned_enabled;
126 #endif
127
128 #ifdef CONFIG_S390
129 #ifdef CONFIG_MATHEMU
130 extern int sysctl_ieee_emulation_warnings;
131 #endif
132 extern int sysctl_userprocess_debug;
133 extern int spin_retry;
134 #endif
135
136 extern int sysctl_hz_timer;
137
138 #ifdef CONFIG_BSD_PROCESS_ACCT
139 extern int acct_parm[];
140 #endif
141
142 #ifdef CONFIG_IA64
143 extern int no_unaligned_warning;
144 #endif
145
146 #ifdef CONFIG_RT_MUTEXES
147 extern int max_lock_depth;
148 #endif
149
150 #ifdef CONFIG_PROC_SYSCTL
151 static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp,
152                   void __user *buffer, size_t *lenp, loff_t *ppos);
153 static int proc_dointvec_taint(struct ctl_table *table, int write, struct file *filp,
154                                void __user *buffer, size_t *lenp, loff_t *ppos);
155 #endif
156
157 static struct ctl_table root_table[];
158 static struct ctl_table_root sysctl_table_root;
159 static struct ctl_table_header root_table_header = {
160         .ctl_table = root_table,
161         .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.header_list),
162         .root = &sysctl_table_root,
163 };
164 static struct ctl_table_root sysctl_table_root = {
165         .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list),
166         .header_list = LIST_HEAD_INIT(root_table_header.ctl_entry),
167 };
168
169 static struct ctl_table kern_table[];
170 static struct ctl_table vm_table[];
171 static struct ctl_table fs_table[];
172 static struct ctl_table debug_table[];
173 static struct ctl_table dev_table[];
174 extern struct ctl_table random_table[];
175 #ifdef CONFIG_INOTIFY_USER
176 extern struct ctl_table inotify_table[];
177 #endif
178
179 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
180 int sysctl_legacy_va_layout;
181 #endif
182
183 extern int prove_locking;
184 extern int lock_stat;
185
186 /* The default sysctl tables: */
187
188 static struct ctl_table root_table[] = {
189         {
190                 .ctl_name       = CTL_KERN,
191                 .procname       = "kernel",
192                 .mode           = 0555,
193                 .child          = kern_table,
194         },
195         {
196                 .ctl_name       = CTL_VM,
197                 .procname       = "vm",
198                 .mode           = 0555,
199                 .child          = vm_table,
200         },
201         {
202                 .ctl_name       = CTL_FS,
203                 .procname       = "fs",
204                 .mode           = 0555,
205                 .child          = fs_table,
206         },
207         {
208                 .ctl_name       = CTL_DEBUG,
209                 .procname       = "debug",
210                 .mode           = 0555,
211                 .child          = debug_table,
212         },
213         {
214                 .ctl_name       = CTL_DEV,
215                 .procname       = "dev",
216                 .mode           = 0555,
217                 .child          = dev_table,
218         },
219 /*
220  * NOTE: do not add new entries to this table unless you have read
221  * Documentation/sysctl/ctl_unnumbered.txt
222  */
223         { .ctl_name = 0 }
224 };
225
226 #ifdef CONFIG_SCHED_DEBUG
227 static int min_sched_granularity_ns = 100000;           /* 100 usecs */
228 static int max_sched_granularity_ns = NSEC_PER_SEC;     /* 1 second */
229 static int min_wakeup_granularity_ns;                   /* 0 usecs */
230 static int max_wakeup_granularity_ns = NSEC_PER_SEC;    /* 1 second */
231 #endif
232
233 static struct ctl_table kern_table[] = {
234 #ifdef CONFIG_SCHED_DEBUG
235         {
236                 .ctl_name       = CTL_UNNUMBERED,
237                 .procname       = "sched_min_granularity_ns",
238                 .data           = &sysctl_sched_min_granularity,
239                 .maxlen         = sizeof(unsigned int),
240                 .mode           = 0644,
241                 .proc_handler   = &sched_nr_latency_handler,
242                 .strategy       = &sysctl_intvec,
243                 .extra1         = &min_sched_granularity_ns,
244                 .extra2         = &max_sched_granularity_ns,
245         },
246         {
247                 .ctl_name       = CTL_UNNUMBERED,
248                 .procname       = "sched_latency_ns",
249                 .data           = &sysctl_sched_latency,
250                 .maxlen         = sizeof(unsigned int),
251                 .mode           = 0644,
252                 .proc_handler   = &sched_nr_latency_handler,
253                 .strategy       = &sysctl_intvec,
254                 .extra1         = &min_sched_granularity_ns,
255                 .extra2         = &max_sched_granularity_ns,
256         },
257         {
258                 .ctl_name       = CTL_UNNUMBERED,
259                 .procname       = "sched_wakeup_granularity_ns",
260                 .data           = &sysctl_sched_wakeup_granularity,
261                 .maxlen         = sizeof(unsigned int),
262                 .mode           = 0644,
263                 .proc_handler   = &proc_dointvec_minmax,
264                 .strategy       = &sysctl_intvec,
265                 .extra1         = &min_wakeup_granularity_ns,
266                 .extra2         = &max_wakeup_granularity_ns,
267         },
268         {
269                 .ctl_name       = CTL_UNNUMBERED,
270                 .procname       = "sched_child_runs_first",
271                 .data           = &sysctl_sched_child_runs_first,
272                 .maxlen         = sizeof(unsigned int),
273                 .mode           = 0644,
274                 .proc_handler   = &proc_dointvec,
275         },
276         {
277                 .ctl_name       = CTL_UNNUMBERED,
278                 .procname       = "sched_features",
279                 .data           = &sysctl_sched_features,
280                 .maxlen         = sizeof(unsigned int),
281                 .mode           = 0644,
282                 .proc_handler   = &proc_dointvec,
283         },
284         {
285                 .ctl_name       = CTL_UNNUMBERED,
286                 .procname       = "sched_migration_cost",
287                 .data           = &sysctl_sched_migration_cost,
288                 .maxlen         = sizeof(unsigned int),
289                 .mode           = 0644,
290                 .proc_handler   = &proc_dointvec,
291         },
292         {
293                 .ctl_name       = CTL_UNNUMBERED,
294                 .procname       = "sched_nr_migrate",
295                 .data           = &sysctl_sched_nr_migrate,
296                 .maxlen         = sizeof(unsigned int),
297                 .mode           = 0644,
298                 .proc_handler   = &proc_dointvec,
299         },
300 #endif
301         {
302                 .ctl_name       = CTL_UNNUMBERED,
303                 .procname       = "sched_rt_period_us",
304                 .data           = &sysctl_sched_rt_period,
305                 .maxlen         = sizeof(unsigned int),
306                 .mode           = 0644,
307                 .proc_handler   = &sched_rt_handler,
308         },
309         {
310                 .ctl_name       = CTL_UNNUMBERED,
311                 .procname       = "sched_rt_runtime_us",
312                 .data           = &sysctl_sched_rt_runtime,
313                 .maxlen         = sizeof(int),
314                 .mode           = 0644,
315                 .proc_handler   = &sched_rt_handler,
316         },
317         {
318                 .ctl_name       = CTL_UNNUMBERED,
319                 .procname       = "sched_compat_yield",
320                 .data           = &sysctl_sched_compat_yield,
321                 .maxlen         = sizeof(unsigned int),
322                 .mode           = 0644,
323                 .proc_handler   = &proc_dointvec,
324         },
325 #ifdef CONFIG_PROVE_LOCKING
326         {
327                 .ctl_name       = CTL_UNNUMBERED,
328                 .procname       = "prove_locking",
329                 .data           = &prove_locking,
330                 .maxlen         = sizeof(int),
331                 .mode           = 0644,
332                 .proc_handler   = &proc_dointvec,
333         },
334 #endif
335 #ifdef CONFIG_LOCK_STAT
336         {
337                 .ctl_name       = CTL_UNNUMBERED,
338                 .procname       = "lock_stat",
339                 .data           = &lock_stat,
340                 .maxlen         = sizeof(int),
341                 .mode           = 0644,
342                 .proc_handler   = &proc_dointvec,
343         },
344 #endif
345         {
346                 .ctl_name       = KERN_PANIC,
347                 .procname       = "panic",
348                 .data           = &panic_timeout,
349                 .maxlen         = sizeof(int),
350                 .mode           = 0644,
351                 .proc_handler   = &proc_dointvec,
352         },
353         {
354                 .ctl_name       = KERN_CORE_USES_PID,
355                 .procname       = "core_uses_pid",
356                 .data           = &core_uses_pid,
357                 .maxlen         = sizeof(int),
358                 .mode           = 0644,
359                 .proc_handler   = &proc_dointvec,
360         },
361         {
362                 .ctl_name       = KERN_CORE_PATTERN,
363                 .procname       = "core_pattern",
364                 .data           = core_pattern,
365                 .maxlen         = CORENAME_MAX_SIZE,
366                 .mode           = 0644,
367                 .proc_handler   = &proc_dostring,
368                 .strategy       = &sysctl_string,
369         },
370 #ifdef CONFIG_PROC_SYSCTL
371         {
372                 .procname       = "tainted",
373                 .data           = &tainted,
374                 .maxlen         = sizeof(int),
375                 .mode           = 0644,
376                 .proc_handler   = &proc_dointvec_taint,
377         },
378 #endif
379 #ifdef CONFIG_LATENCYTOP
380         {
381                 .procname       = "latencytop",
382                 .data           = &latencytop_enabled,
383                 .maxlen         = sizeof(int),
384                 .mode           = 0644,
385                 .proc_handler   = &proc_dointvec,
386         },
387 #endif
388 #ifdef CONFIG_BLK_DEV_INITRD
389         {
390                 .ctl_name       = KERN_REALROOTDEV,
391                 .procname       = "real-root-dev",
392                 .data           = &real_root_dev,
393                 .maxlen         = sizeof(int),
394                 .mode           = 0644,
395                 .proc_handler   = &proc_dointvec,
396         },
397 #endif
398         {
399                 .ctl_name       = CTL_UNNUMBERED,
400                 .procname       = "print-fatal-signals",
401                 .data           = &print_fatal_signals,
402                 .maxlen         = sizeof(int),
403                 .mode           = 0644,
404                 .proc_handler   = &proc_dointvec,
405         },
406 #ifdef __sparc__
407         {
408                 .ctl_name       = KERN_SPARC_REBOOT,
409                 .procname       = "reboot-cmd",
410                 .data           = reboot_command,
411                 .maxlen         = 256,
412                 .mode           = 0644,
413                 .proc_handler   = &proc_dostring,
414                 .strategy       = &sysctl_string,
415         },
416         {
417                 .ctl_name       = KERN_SPARC_STOP_A,
418                 .procname       = "stop-a",
419                 .data           = &stop_a_enabled,
420                 .maxlen         = sizeof (int),
421                 .mode           = 0644,
422                 .proc_handler   = &proc_dointvec,
423         },
424         {
425                 .ctl_name       = KERN_SPARC_SCONS_PWROFF,
426                 .procname       = "scons-poweroff",
427                 .data           = &scons_pwroff,
428                 .maxlen         = sizeof (int),
429                 .mode           = 0644,
430                 .proc_handler   = &proc_dointvec,
431         },
432 #endif
433 #ifdef __hppa__
434         {
435                 .ctl_name       = KERN_HPPA_PWRSW,
436                 .procname       = "soft-power",
437                 .data           = &pwrsw_enabled,
438                 .maxlen         = sizeof (int),
439                 .mode           = 0644,
440                 .proc_handler   = &proc_dointvec,
441         },
442         {
443                 .ctl_name       = KERN_HPPA_UNALIGNED,
444                 .procname       = "unaligned-trap",
445                 .data           = &unaligned_enabled,
446                 .maxlen         = sizeof (int),
447                 .mode           = 0644,
448                 .proc_handler   = &proc_dointvec,
449         },
450 #endif
451         {
452                 .ctl_name       = KERN_CTLALTDEL,
453                 .procname       = "ctrl-alt-del",
454                 .data           = &C_A_D,
455                 .maxlen         = sizeof(int),
456                 .mode           = 0644,
457                 .proc_handler   = &proc_dointvec,
458         },
459 #ifdef CONFIG_FTRACE
460         {
461                 .ctl_name       = CTL_UNNUMBERED,
462                 .procname       = "ftrace_enabled",
463                 .data           = &ftrace_enabled,
464                 .maxlen         = sizeof(int),
465                 .mode           = 0644,
466                 .proc_handler   = &ftrace_enable_sysctl,
467         },
468 #endif
469 #ifdef CONFIG_KMOD
470         {
471                 .ctl_name       = KERN_MODPROBE,
472                 .procname       = "modprobe",
473                 .data           = &modprobe_path,
474                 .maxlen         = KMOD_PATH_LEN,
475                 .mode           = 0644,
476                 .proc_handler   = &proc_dostring,
477                 .strategy       = &sysctl_string,
478         },
479 #endif
480 #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
481         {
482                 .ctl_name       = KERN_HOTPLUG,
483                 .procname       = "hotplug",
484                 .data           = &uevent_helper,
485                 .maxlen         = UEVENT_HELPER_PATH_LEN,
486                 .mode           = 0644,
487                 .proc_handler   = &proc_dostring,
488                 .strategy       = &sysctl_string,
489         },
490 #endif
491 #ifdef CONFIG_CHR_DEV_SG
492         {
493                 .ctl_name       = KERN_SG_BIG_BUFF,
494                 .procname       = "sg-big-buff",
495                 .data           = &sg_big_buff,
496                 .maxlen         = sizeof (int),
497                 .mode           = 0444,
498                 .proc_handler   = &proc_dointvec,
499         },
500 #endif
501 #ifdef CONFIG_BSD_PROCESS_ACCT
502         {
503                 .ctl_name       = KERN_ACCT,
504                 .procname       = "acct",
505                 .data           = &acct_parm,
506                 .maxlen         = 3*sizeof(int),
507                 .mode           = 0644,
508                 .proc_handler   = &proc_dointvec,
509         },
510 #endif
511 #ifdef CONFIG_MAGIC_SYSRQ
512         {
513                 .ctl_name       = KERN_SYSRQ,
514                 .procname       = "sysrq",
515                 .data           = &__sysrq_enabled,
516                 .maxlen         = sizeof (int),
517                 .mode           = 0644,
518                 .proc_handler   = &proc_dointvec,
519         },
520 #endif
521 #ifdef CONFIG_PROC_SYSCTL
522         {
523                 .procname       = "cad_pid",
524                 .data           = NULL,
525                 .maxlen         = sizeof (int),
526                 .mode           = 0600,
527                 .proc_handler   = &proc_do_cad_pid,
528         },
529 #endif
530         {
531                 .ctl_name       = KERN_MAX_THREADS,
532                 .procname       = "threads-max",
533                 .data           = &max_threads,
534                 .maxlen         = sizeof(int),
535                 .mode           = 0644,
536                 .proc_handler   = &proc_dointvec,
537         },
538         {
539                 .ctl_name       = KERN_RANDOM,
540                 .procname       = "random",
541                 .mode           = 0555,
542                 .child          = random_table,
543         },
544         {
545                 .ctl_name       = KERN_OVERFLOWUID,
546                 .procname       = "overflowuid",
547                 .data           = &overflowuid,
548                 .maxlen         = sizeof(int),
549                 .mode           = 0644,
550                 .proc_handler   = &proc_dointvec_minmax,
551                 .strategy       = &sysctl_intvec,
552                 .extra1         = &minolduid,
553                 .extra2         = &maxolduid,
554         },
555         {
556                 .ctl_name       = KERN_OVERFLOWGID,
557                 .procname       = "overflowgid",
558                 .data           = &overflowgid,
559                 .maxlen         = sizeof(int),
560                 .mode           = 0644,
561                 .proc_handler   = &proc_dointvec_minmax,
562                 .strategy       = &sysctl_intvec,
563                 .extra1         = &minolduid,
564                 .extra2         = &maxolduid,
565         },
566 #ifdef CONFIG_S390
567 #ifdef CONFIG_MATHEMU
568         {
569                 .ctl_name       = KERN_IEEE_EMULATION_WARNINGS,
570                 .procname       = "ieee_emulation_warnings",
571                 .data           = &sysctl_ieee_emulation_warnings,
572                 .maxlen         = sizeof(int),
573                 .mode           = 0644,
574                 .proc_handler   = &proc_dointvec,
575         },
576 #endif
577 #ifdef CONFIG_NO_IDLE_HZ
578         {
579                 .ctl_name       = KERN_HZ_TIMER,
580                 .procname       = "hz_timer",
581                 .data           = &sysctl_hz_timer,
582                 .maxlen         = sizeof(int),
583                 .mode           = 0644,
584                 .proc_handler   = &proc_dointvec,
585         },
586 #endif
587         {
588                 .ctl_name       = KERN_S390_USER_DEBUG_LOGGING,
589                 .procname       = "userprocess_debug",
590                 .data           = &sysctl_userprocess_debug,
591                 .maxlen         = sizeof(int),
592                 .mode           = 0644,
593                 .proc_handler   = &proc_dointvec,
594         },
595 #endif
596         {
597                 .ctl_name       = KERN_PIDMAX,
598                 .procname       = "pid_max",
599                 .data           = &pid_max,
600                 .maxlen         = sizeof (int),
601                 .mode           = 0644,
602                 .proc_handler   = &proc_dointvec_minmax,
603                 .strategy       = sysctl_intvec,
604                 .extra1         = &pid_max_min,
605                 .extra2         = &pid_max_max,
606         },
607         {
608                 .ctl_name       = KERN_PANIC_ON_OOPS,
609                 .procname       = "panic_on_oops",
610                 .data           = &panic_on_oops,
611                 .maxlen         = sizeof(int),
612                 .mode           = 0644,
613                 .proc_handler   = &proc_dointvec,
614         },
615 #if defined CONFIG_PRINTK
616         {
617                 .ctl_name       = KERN_PRINTK,
618                 .procname       = "printk",
619                 .data           = &console_loglevel,
620                 .maxlen         = 4*sizeof(int),
621                 .mode           = 0644,
622                 .proc_handler   = &proc_dointvec,
623         },
624         {
625                 .ctl_name       = KERN_PRINTK_RATELIMIT,
626                 .procname       = "printk_ratelimit",
627                 .data           = &printk_ratelimit_jiffies,
628                 .maxlen         = sizeof(int),
629                 .mode           = 0644,
630                 .proc_handler   = &proc_dointvec_jiffies,
631                 .strategy       = &sysctl_jiffies,
632         },
633         {
634                 .ctl_name       = KERN_PRINTK_RATELIMIT_BURST,
635                 .procname       = "printk_ratelimit_burst",
636                 .data           = &printk_ratelimit_burst,
637                 .maxlen         = sizeof(int),
638                 .mode           = 0644,
639                 .proc_handler   = &proc_dointvec,
640         },
641 #endif
642         {
643                 .ctl_name       = KERN_NGROUPS_MAX,
644                 .procname       = "ngroups_max",
645                 .data           = &ngroups_max,
646                 .maxlen         = sizeof (int),
647                 .mode           = 0444,
648                 .proc_handler   = &proc_dointvec,
649         },
650 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
651         {
652                 .ctl_name       = KERN_UNKNOWN_NMI_PANIC,
653                 .procname       = "unknown_nmi_panic",
654                 .data           = &unknown_nmi_panic,
655                 .maxlen         = sizeof (int),
656                 .mode           = 0644,
657                 .proc_handler   = &proc_dointvec,
658         },
659         {
660                 .procname       = "nmi_watchdog",
661                 .data           = &nmi_watchdog_enabled,
662                 .maxlen         = sizeof (int),
663                 .mode           = 0644,
664                 .proc_handler   = &proc_nmi_enabled,
665         },
666 #endif
667 #if defined(CONFIG_X86)
668         {
669                 .ctl_name       = KERN_PANIC_ON_NMI,
670                 .procname       = "panic_on_unrecovered_nmi",
671                 .data           = &panic_on_unrecovered_nmi,
672                 .maxlen         = sizeof(int),
673                 .mode           = 0644,
674                 .proc_handler   = &proc_dointvec,
675         },
676         {
677                 .ctl_name       = KERN_BOOTLOADER_TYPE,
678                 .procname       = "bootloader_type",
679                 .data           = &bootloader_type,
680                 .maxlen         = sizeof (int),
681                 .mode           = 0444,
682                 .proc_handler   = &proc_dointvec,
683         },
684         {
685                 .ctl_name       = CTL_UNNUMBERED,
686                 .procname       = "kstack_depth_to_print",
687                 .data           = &kstack_depth_to_print,
688                 .maxlen         = sizeof(int),
689                 .mode           = 0644,
690                 .proc_handler   = &proc_dointvec,
691         },
692         {
693                 .ctl_name       = CTL_UNNUMBERED,
694                 .procname       = "io_delay_type",
695                 .data           = &io_delay_type,
696                 .maxlen         = sizeof(int),
697                 .mode           = 0644,
698                 .proc_handler   = &proc_dointvec,
699         },
700 #endif
701 #if defined(CONFIG_MMU)
702         {
703                 .ctl_name       = KERN_RANDOMIZE,
704                 .procname       = "randomize_va_space",
705                 .data           = &randomize_va_space,
706                 .maxlen         = sizeof(int),
707                 .mode           = 0644,
708                 .proc_handler   = &proc_dointvec,
709         },
710 #endif
711 #if defined(CONFIG_S390) && defined(CONFIG_SMP)
712         {
713                 .ctl_name       = KERN_SPIN_RETRY,
714                 .procname       = "spin_retry",
715                 .data           = &spin_retry,
716                 .maxlen         = sizeof (int),
717                 .mode           = 0644,
718                 .proc_handler   = &proc_dointvec,
719         },
720 #endif
721 #if     defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
722         {
723                 .procname       = "acpi_video_flags",
724                 .data           = &acpi_realmode_flags,
725                 .maxlen         = sizeof (unsigned long),
726                 .mode           = 0644,
727                 .proc_handler   = &proc_doulongvec_minmax,
728         },
729 #endif
730 #ifdef CONFIG_IA64
731         {
732                 .ctl_name       = KERN_IA64_UNALIGNED,
733                 .procname       = "ignore-unaligned-usertrap",
734                 .data           = &no_unaligned_warning,
735                 .maxlen         = sizeof (int),
736                 .mode           = 0644,
737                 .proc_handler   = &proc_dointvec,
738         },
739 #endif
740 #ifdef CONFIG_DETECT_SOFTLOCKUP
741         {
742                 .ctl_name       = CTL_UNNUMBERED,
743                 .procname       = "softlockup_thresh",
744                 .data           = &softlockup_thresh,
745                 .maxlen         = sizeof(unsigned long),
746                 .mode           = 0644,
747                 .proc_handler   = &proc_doulongvec_minmax,
748                 .strategy       = &sysctl_intvec,
749                 .extra1         = &one,
750                 .extra2         = &sixty,
751         },
752         {
753                 .ctl_name       = CTL_UNNUMBERED,
754                 .procname       = "hung_task_check_count",
755                 .data           = &sysctl_hung_task_check_count,
756                 .maxlen         = sizeof(unsigned long),
757                 .mode           = 0644,
758                 .proc_handler   = &proc_doulongvec_minmax,
759                 .strategy       = &sysctl_intvec,
760         },
761         {
762                 .ctl_name       = CTL_UNNUMBERED,
763                 .procname       = "hung_task_timeout_secs",
764                 .data           = &sysctl_hung_task_timeout_secs,
765                 .maxlen         = sizeof(unsigned long),
766                 .mode           = 0644,
767                 .proc_handler   = &proc_doulongvec_minmax,
768                 .strategy       = &sysctl_intvec,
769         },
770         {
771                 .ctl_name       = CTL_UNNUMBERED,
772                 .procname       = "hung_task_warnings",
773                 .data           = &sysctl_hung_task_warnings,
774                 .maxlen         = sizeof(unsigned long),
775                 .mode           = 0644,
776                 .proc_handler   = &proc_doulongvec_minmax,
777                 .strategy       = &sysctl_intvec,
778         },
779 #endif
780 #ifdef CONFIG_COMPAT
781         {
782                 .ctl_name       = KERN_COMPAT_LOG,
783                 .procname       = "compat-log",
784                 .data           = &compat_log,
785                 .maxlen         = sizeof (int),
786                 .mode           = 0644,
787                 .proc_handler   = &proc_dointvec,
788         },
789 #endif
790 #ifdef CONFIG_RT_MUTEXES
791         {
792                 .ctl_name       = KERN_MAX_LOCK_DEPTH,
793                 .procname       = "max_lock_depth",
794                 .data           = &max_lock_depth,
795                 .maxlen         = sizeof(int),
796                 .mode           = 0644,
797                 .proc_handler   = &proc_dointvec,
798         },
799 #endif
800 #ifdef CONFIG_PROC_FS
801         {
802                 .ctl_name       = CTL_UNNUMBERED,
803                 .procname       = "maps_protect",
804                 .data           = &maps_protect,
805                 .maxlen         = sizeof(int),
806                 .mode           = 0644,
807                 .proc_handler   = &proc_dointvec,
808         },
809 #endif
810         {
811                 .ctl_name       = CTL_UNNUMBERED,
812                 .procname       = "poweroff_cmd",
813                 .data           = &poweroff_cmd,
814                 .maxlen         = POWEROFF_CMD_PATH_LEN,
815                 .mode           = 0644,
816                 .proc_handler   = &proc_dostring,
817                 .strategy       = &sysctl_string,
818         },
819 #ifdef CONFIG_KEYS
820         {
821                 .ctl_name       = CTL_UNNUMBERED,
822                 .procname       = "keys",
823                 .mode           = 0555,
824                 .child          = key_sysctls,
825         },
826 #endif
827 /*
828  * NOTE: do not add new entries to this table unless you have read
829  * Documentation/sysctl/ctl_unnumbered.txt
830  */
831         { .ctl_name = 0 }
832 };
833
834 static struct ctl_table vm_table[] = {
835         {
836                 .ctl_name       = VM_OVERCOMMIT_MEMORY,
837                 .procname       = "overcommit_memory",
838                 .data           = &sysctl_overcommit_memory,
839                 .maxlen         = sizeof(sysctl_overcommit_memory),
840                 .mode           = 0644,
841                 .proc_handler   = &proc_dointvec,
842         },
843         {
844                 .ctl_name       = VM_PANIC_ON_OOM,
845                 .procname       = "panic_on_oom",
846                 .data           = &sysctl_panic_on_oom,
847                 .maxlen         = sizeof(sysctl_panic_on_oom),
848                 .mode           = 0644,
849                 .proc_handler   = &proc_dointvec,
850         },
851         {
852                 .ctl_name       = CTL_UNNUMBERED,
853                 .procname       = "oom_kill_allocating_task",
854                 .data           = &sysctl_oom_kill_allocating_task,
855                 .maxlen         = sizeof(sysctl_oom_kill_allocating_task),
856                 .mode           = 0644,
857                 .proc_handler   = &proc_dointvec,
858         },
859         {
860                 .ctl_name       = CTL_UNNUMBERED,
861                 .procname       = "oom_dump_tasks",
862                 .data           = &sysctl_oom_dump_tasks,
863                 .maxlen         = sizeof(sysctl_oom_dump_tasks),
864                 .mode           = 0644,
865                 .proc_handler   = &proc_dointvec,
866         },
867         {
868                 .ctl_name       = VM_OVERCOMMIT_RATIO,
869                 .procname       = "overcommit_ratio",
870                 .data           = &sysctl_overcommit_ratio,
871                 .maxlen         = sizeof(sysctl_overcommit_ratio),
872                 .mode           = 0644,
873                 .proc_handler   = &proc_dointvec,
874         },
875         {
876                 .ctl_name       = VM_PAGE_CLUSTER,
877                 .procname       = "page-cluster", 
878                 .data           = &page_cluster,
879                 .maxlen         = sizeof(int),
880                 .mode           = 0644,
881                 .proc_handler   = &proc_dointvec,
882         },
883         {
884                 .ctl_name       = VM_DIRTY_BACKGROUND,
885                 .procname       = "dirty_background_ratio",
886                 .data           = &dirty_background_ratio,
887                 .maxlen         = sizeof(dirty_background_ratio),
888                 .mode           = 0644,
889                 .proc_handler   = &proc_dointvec_minmax,
890                 .strategy       = &sysctl_intvec,
891                 .extra1         = &zero,
892                 .extra2         = &one_hundred,
893         },
894         {
895                 .ctl_name       = VM_DIRTY_RATIO,
896                 .procname       = "dirty_ratio",
897                 .data           = &vm_dirty_ratio,
898                 .maxlen         = sizeof(vm_dirty_ratio),
899                 .mode           = 0644,
900                 .proc_handler   = &dirty_ratio_handler,
901                 .strategy       = &sysctl_intvec,
902                 .extra1         = &zero,
903                 .extra2         = &one_hundred,
904         },
905         {
906                 .procname       = "dirty_writeback_centisecs",
907                 .data           = &dirty_writeback_interval,
908                 .maxlen         = sizeof(dirty_writeback_interval),
909                 .mode           = 0644,
910                 .proc_handler   = &dirty_writeback_centisecs_handler,
911         },
912         {
913                 .procname       = "dirty_expire_centisecs",
914                 .data           = &dirty_expire_interval,
915                 .maxlen         = sizeof(dirty_expire_interval),
916                 .mode           = 0644,
917                 .proc_handler   = &proc_dointvec_userhz_jiffies,
918         },
919         {
920                 .ctl_name       = VM_NR_PDFLUSH_THREADS,
921                 .procname       = "nr_pdflush_threads",
922                 .data           = &nr_pdflush_threads,
923                 .maxlen         = sizeof nr_pdflush_threads,
924                 .mode           = 0444 /* read-only*/,
925                 .proc_handler   = &proc_dointvec,
926         },
927         {
928                 .ctl_name       = VM_SWAPPINESS,
929                 .procname       = "swappiness",
930                 .data           = &vm_swappiness,
931                 .maxlen         = sizeof(vm_swappiness),
932                 .mode           = 0644,
933                 .proc_handler   = &proc_dointvec_minmax,
934                 .strategy       = &sysctl_intvec,
935                 .extra1         = &zero,
936                 .extra2         = &one_hundred,
937         },
938 #ifdef CONFIG_HUGETLB_PAGE
939          {
940                 .procname       = "nr_hugepages",
941                 .data           = &max_huge_pages,
942                 .maxlen         = sizeof(unsigned long),
943                 .mode           = 0644,
944                 .proc_handler   = &hugetlb_sysctl_handler,
945                 .extra1         = (void *)&hugetlb_zero,
946                 .extra2         = (void *)&hugetlb_infinity,
947          },
948          {
949                 .ctl_name       = VM_HUGETLB_GROUP,
950                 .procname       = "hugetlb_shm_group",
951                 .data           = &sysctl_hugetlb_shm_group,
952                 .maxlen         = sizeof(gid_t),
953                 .mode           = 0644,
954                 .proc_handler   = &proc_dointvec,
955          },
956          {
957                 .ctl_name       = CTL_UNNUMBERED,
958                 .procname       = "hugepages_treat_as_movable",
959                 .data           = &hugepages_treat_as_movable,
960                 .maxlen         = sizeof(int),
961                 .mode           = 0644,
962                 .proc_handler   = &hugetlb_treat_movable_handler,
963         },
964         {
965                 .ctl_name       = CTL_UNNUMBERED,
966                 .procname       = "nr_overcommit_hugepages",
967                 .data           = &sysctl_overcommit_huge_pages,
968                 .maxlen         = sizeof(sysctl_overcommit_huge_pages),
969                 .mode           = 0644,
970                 .proc_handler   = &hugetlb_overcommit_handler,
971         },
972 #endif
973         {
974                 .ctl_name       = VM_LOWMEM_RESERVE_RATIO,
975                 .procname       = "lowmem_reserve_ratio",
976                 .data           = &sysctl_lowmem_reserve_ratio,
977                 .maxlen         = sizeof(sysctl_lowmem_reserve_ratio),
978                 .mode           = 0644,
979                 .proc_handler   = &lowmem_reserve_ratio_sysctl_handler,
980                 .strategy       = &sysctl_intvec,
981         },
982         {
983                 .ctl_name       = VM_DROP_PAGECACHE,
984                 .procname       = "drop_caches",
985                 .data           = &sysctl_drop_caches,
986                 .maxlen         = sizeof(int),
987                 .mode           = 0644,
988                 .proc_handler   = drop_caches_sysctl_handler,
989                 .strategy       = &sysctl_intvec,
990         },
991         {
992                 .ctl_name       = VM_MIN_FREE_KBYTES,
993                 .procname       = "min_free_kbytes",
994                 .data           = &min_free_kbytes,
995                 .maxlen         = sizeof(min_free_kbytes),
996                 .mode           = 0644,
997                 .proc_handler   = &min_free_kbytes_sysctl_handler,
998                 .strategy       = &sysctl_intvec,
999                 .extra1         = &zero,
1000         },
1001         {
1002                 .ctl_name       = VM_PERCPU_PAGELIST_FRACTION,
1003                 .procname       = "percpu_pagelist_fraction",
1004                 .data           = &percpu_pagelist_fraction,
1005                 .maxlen         = sizeof(percpu_pagelist_fraction),
1006                 .mode           = 0644,
1007                 .proc_handler   = &percpu_pagelist_fraction_sysctl_handler,
1008                 .strategy       = &sysctl_intvec,
1009                 .extra1         = &min_percpu_pagelist_fract,
1010         },
1011 #ifdef CONFIG_MMU
1012         {
1013                 .ctl_name       = VM_MAX_MAP_COUNT,
1014                 .procname       = "max_map_count",
1015                 .data           = &sysctl_max_map_count,
1016                 .maxlen         = sizeof(sysctl_max_map_count),
1017                 .mode           = 0644,
1018                 .proc_handler   = &proc_dointvec
1019         },
1020 #endif
1021         {
1022                 .ctl_name       = VM_LAPTOP_MODE,
1023                 .procname       = "laptop_mode",
1024                 .data           = &laptop_mode,
1025                 .maxlen         = sizeof(laptop_mode),
1026                 .mode           = 0644,
1027                 .proc_handler   = &proc_dointvec_jiffies,
1028                 .strategy       = &sysctl_jiffies,
1029         },
1030         {
1031                 .ctl_name       = VM_BLOCK_DUMP,
1032                 .procname       = "block_dump",
1033                 .data           = &block_dump,
1034                 .maxlen         = sizeof(block_dump),
1035                 .mode           = 0644,
1036                 .proc_handler   = &proc_dointvec,
1037                 .strategy       = &sysctl_intvec,
1038                 .extra1         = &zero,
1039         },
1040         {
1041                 .ctl_name       = VM_VFS_CACHE_PRESSURE,
1042                 .procname       = "vfs_cache_pressure",
1043                 .data           = &sysctl_vfs_cache_pressure,
1044                 .maxlen         = sizeof(sysctl_vfs_cache_pressure),
1045                 .mode           = 0644,
1046                 .proc_handler   = &proc_dointvec,
1047                 .strategy       = &sysctl_intvec,
1048                 .extra1         = &zero,
1049         },
1050 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
1051         {
1052                 .ctl_name       = VM_LEGACY_VA_LAYOUT,
1053                 .procname       = "legacy_va_layout",
1054                 .data           = &sysctl_legacy_va_layout,
1055                 .maxlen         = sizeof(sysctl_legacy_va_layout),
1056                 .mode           = 0644,
1057                 .proc_handler   = &proc_dointvec,
1058                 .strategy       = &sysctl_intvec,
1059                 .extra1         = &zero,
1060         },
1061 #endif
1062 #ifdef CONFIG_NUMA
1063         {
1064                 .ctl_name       = VM_ZONE_RECLAIM_MODE,
1065                 .procname       = "zone_reclaim_mode",
1066                 .data           = &zone_reclaim_mode,
1067                 .maxlen         = sizeof(zone_reclaim_mode),
1068                 .mode           = 0644,
1069                 .proc_handler   = &proc_dointvec,
1070                 .strategy       = &sysctl_intvec,
1071                 .extra1         = &zero,
1072         },
1073         {
1074                 .ctl_name       = VM_MIN_UNMAPPED,
1075                 .procname       = "min_unmapped_ratio",
1076                 .data           = &sysctl_min_unmapped_ratio,
1077                 .maxlen         = sizeof(sysctl_min_unmapped_ratio),
1078                 .mode           = 0644,
1079                 .proc_handler   = &sysctl_min_unmapped_ratio_sysctl_handler,
1080                 .strategy       = &sysctl_intvec,
1081                 .extra1         = &zero,
1082                 .extra2         = &one_hundred,
1083         },
1084         {
1085                 .ctl_name       = VM_MIN_SLAB,
1086                 .procname       = "min_slab_ratio",
1087                 .data           = &sysctl_min_slab_ratio,
1088                 .maxlen         = sizeof(sysctl_min_slab_ratio),
1089                 .mode           = 0644,
1090                 .proc_handler   = &sysctl_min_slab_ratio_sysctl_handler,
1091                 .strategy       = &sysctl_intvec,
1092                 .extra1         = &zero,
1093                 .extra2         = &one_hundred,
1094         },
1095 #endif
1096 #ifdef CONFIG_SMP
1097         {
1098                 .ctl_name       = CTL_UNNUMBERED,
1099                 .procname       = "stat_interval",
1100                 .data           = &sysctl_stat_interval,
1101                 .maxlen         = sizeof(sysctl_stat_interval),
1102                 .mode           = 0644,
1103                 .proc_handler   = &proc_dointvec_jiffies,
1104                 .strategy       = &sysctl_jiffies,
1105         },
1106 #endif
1107 #ifdef CONFIG_SECURITY
1108         {
1109                 .ctl_name       = CTL_UNNUMBERED,
1110                 .procname       = "mmap_min_addr",
1111                 .data           = &mmap_min_addr,
1112                 .maxlen         = sizeof(unsigned long),
1113                 .mode           = 0644,
1114                 .proc_handler   = &proc_doulongvec_minmax,
1115         },
1116 #endif
1117 #ifdef CONFIG_NUMA
1118         {
1119                 .ctl_name       = CTL_UNNUMBERED,
1120                 .procname       = "numa_zonelist_order",
1121                 .data           = &numa_zonelist_order,
1122                 .maxlen         = NUMA_ZONELIST_ORDER_LEN,
1123                 .mode           = 0644,
1124                 .proc_handler   = &numa_zonelist_order_handler,
1125                 .strategy       = &sysctl_string,
1126         },
1127 #endif
1128 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
1129    (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
1130         {
1131                 .ctl_name       = VM_VDSO_ENABLED,
1132                 .procname       = "vdso_enabled",
1133                 .data           = &vdso_enabled,
1134                 .maxlen         = sizeof(vdso_enabled),
1135                 .mode           = 0644,
1136                 .proc_handler   = &proc_dointvec,
1137                 .strategy       = &sysctl_intvec,
1138                 .extra1         = &zero,
1139         },
1140 #endif
1141 #ifdef CONFIG_HIGHMEM
1142         {
1143                 .ctl_name       = CTL_UNNUMBERED,
1144                 .procname       = "highmem_is_dirtyable",
1145                 .data           = &vm_highmem_is_dirtyable,
1146                 .maxlen         = sizeof(vm_highmem_is_dirtyable),
1147                 .mode           = 0644,
1148                 .proc_handler   = &proc_dointvec_minmax,
1149                 .strategy       = &sysctl_intvec,
1150                 .extra1         = &zero,
1151                 .extra2         = &one,
1152         },
1153 #endif
1154 /*
1155  * NOTE: do not add new entries to this table unless you have read
1156  * Documentation/sysctl/ctl_unnumbered.txt
1157  */
1158         { .ctl_name = 0 }
1159 };
1160
1161 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1162 static struct ctl_table binfmt_misc_table[] = {
1163         { .ctl_name = 0 }
1164 };
1165 #endif
1166
1167 static struct ctl_table fs_table[] = {
1168         {
1169                 .ctl_name       = FS_NRINODE,
1170                 .procname       = "inode-nr",
1171                 .data           = &inodes_stat,
1172                 .maxlen         = 2*sizeof(int),
1173                 .mode           = 0444,
1174                 .proc_handler   = &proc_dointvec,
1175         },
1176         {
1177                 .ctl_name       = FS_STATINODE,
1178                 .procname       = "inode-state",
1179                 .data           = &inodes_stat,
1180                 .maxlen         = 7*sizeof(int),
1181                 .mode           = 0444,
1182                 .proc_handler   = &proc_dointvec,
1183         },
1184         {
1185                 .procname       = "file-nr",
1186                 .data           = &files_stat,
1187                 .maxlen         = 3*sizeof(int),
1188                 .mode           = 0444,
1189                 .proc_handler   = &proc_nr_files,
1190         },
1191         {
1192                 .ctl_name       = FS_MAXFILE,
1193                 .procname       = "file-max",
1194                 .data           = &files_stat.max_files,
1195                 .maxlen         = sizeof(int),
1196                 .mode           = 0644,
1197                 .proc_handler   = &proc_dointvec,
1198         },
1199         {
1200                 .ctl_name       = CTL_UNNUMBERED,
1201                 .procname       = "nr_open",
1202                 .data           = &sysctl_nr_open,
1203                 .maxlen         = sizeof(int),
1204                 .mode           = 0644,
1205                 .proc_handler   = &proc_dointvec_minmax,
1206                 .extra1         = &sysctl_nr_open_min,
1207                 .extra2         = &sysctl_nr_open_max,
1208         },
1209         {
1210                 .ctl_name       = FS_DENTRY,
1211                 .procname       = "dentry-state",
1212                 .data           = &dentry_stat,
1213                 .maxlen         = 6*sizeof(int),
1214                 .mode           = 0444,
1215                 .proc_handler   = &proc_dointvec,
1216         },
1217         {
1218                 .ctl_name       = FS_OVERFLOWUID,
1219                 .procname       = "overflowuid",
1220                 .data           = &fs_overflowuid,
1221                 .maxlen         = sizeof(int),
1222                 .mode           = 0644,
1223                 .proc_handler   = &proc_dointvec_minmax,
1224                 .strategy       = &sysctl_intvec,
1225                 .extra1         = &minolduid,
1226                 .extra2         = &maxolduid,
1227         },
1228         {
1229                 .ctl_name       = FS_OVERFLOWGID,
1230                 .procname       = "overflowgid",
1231                 .data           = &fs_overflowgid,
1232                 .maxlen         = sizeof(int),
1233                 .mode           = 0644,
1234                 .proc_handler   = &proc_dointvec_minmax,
1235                 .strategy       = &sysctl_intvec,
1236                 .extra1         = &minolduid,
1237                 .extra2         = &maxolduid,
1238         },
1239         {
1240                 .ctl_name       = FS_LEASES,
1241                 .procname       = "leases-enable",
1242                 .data           = &leases_enable,
1243                 .maxlen         = sizeof(int),
1244                 .mode           = 0644,
1245                 .proc_handler   = &proc_dointvec,
1246         },
1247 #ifdef CONFIG_DNOTIFY
1248         {
1249                 .ctl_name       = FS_DIR_NOTIFY,
1250                 .procname       = "dir-notify-enable",
1251                 .data           = &dir_notify_enable,
1252                 .maxlen         = sizeof(int),
1253                 .mode           = 0644,
1254                 .proc_handler   = &proc_dointvec,
1255         },
1256 #endif
1257 #ifdef CONFIG_MMU
1258         {
1259                 .ctl_name       = FS_LEASE_TIME,
1260                 .procname       = "lease-break-time",
1261                 .data           = &lease_break_time,
1262                 .maxlen         = sizeof(int),
1263                 .mode           = 0644,
1264                 .proc_handler   = &proc_dointvec_minmax,
1265                 .strategy       = &sysctl_intvec,
1266                 .extra1         = &zero,
1267                 .extra2         = &two,
1268         },
1269         {
1270                 .procname       = "aio-nr",
1271                 .data           = &aio_nr,
1272                 .maxlen         = sizeof(aio_nr),
1273                 .mode           = 0444,
1274                 .proc_handler   = &proc_doulongvec_minmax,
1275         },
1276         {
1277                 .procname       = "aio-max-nr",
1278                 .data           = &aio_max_nr,
1279                 .maxlen         = sizeof(aio_max_nr),
1280                 .mode           = 0644,
1281                 .proc_handler   = &proc_doulongvec_minmax,
1282         },
1283 #ifdef CONFIG_INOTIFY_USER
1284         {
1285                 .ctl_name       = FS_INOTIFY,
1286                 .procname       = "inotify",
1287                 .mode           = 0555,
1288                 .child          = inotify_table,
1289         },
1290 #endif  
1291 #endif
1292         {
1293                 .ctl_name       = KERN_SETUID_DUMPABLE,
1294                 .procname       = "suid_dumpable",
1295                 .data           = &suid_dumpable,
1296                 .maxlen         = sizeof(int),
1297                 .mode           = 0644,
1298                 .proc_handler   = &proc_dointvec,
1299         },
1300 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1301         {
1302                 .ctl_name       = CTL_UNNUMBERED,
1303                 .procname       = "binfmt_misc",
1304                 .mode           = 0555,
1305                 .child          = binfmt_misc_table,
1306         },
1307 #endif
1308 /*
1309  * NOTE: do not add new entries to this table unless you have read
1310  * Documentation/sysctl/ctl_unnumbered.txt
1311  */
1312         { .ctl_name = 0 }
1313 };
1314
1315 static struct ctl_table debug_table[] = {
1316 #if defined(CONFIG_X86) || defined(CONFIG_PPC)
1317         {
1318                 .ctl_name       = CTL_UNNUMBERED,
1319                 .procname       = "exception-trace",
1320                 .data           = &show_unhandled_signals,
1321                 .maxlen         = sizeof(int),
1322                 .mode           = 0644,
1323                 .proc_handler   = proc_dointvec
1324         },
1325 #endif
1326         { .ctl_name = 0 }
1327 };
1328
1329 static struct ctl_table dev_table[] = {
1330         { .ctl_name = 0 }
1331 };
1332
1333 static DEFINE_SPINLOCK(sysctl_lock);
1334
1335 /* called under sysctl_lock */
1336 static int use_table(struct ctl_table_header *p)
1337 {
1338         if (unlikely(p->unregistering))
1339                 return 0;
1340         p->used++;
1341         return 1;
1342 }
1343
1344 /* called under sysctl_lock */
1345 static void unuse_table(struct ctl_table_header *p)
1346 {
1347         if (!--p->used)
1348                 if (unlikely(p->unregistering))
1349                         complete(p->unregistering);
1350 }
1351
1352 /* called under sysctl_lock, will reacquire if has to wait */
1353 static void start_unregistering(struct ctl_table_header *p)
1354 {
1355         /*
1356          * if p->used is 0, nobody will ever touch that entry again;
1357          * we'll eliminate all paths to it before dropping sysctl_lock
1358          */
1359         if (unlikely(p->used)) {
1360                 struct completion wait;
1361                 init_completion(&wait);
1362                 p->unregistering = &wait;
1363                 spin_unlock(&sysctl_lock);
1364                 wait_for_completion(&wait);
1365                 spin_lock(&sysctl_lock);
1366         }
1367         /*
1368          * do not remove from the list until nobody holds it; walking the
1369          * list in do_sysctl() relies on that.
1370          */
1371         list_del_init(&p->ctl_entry);
1372 }
1373
1374 void sysctl_head_finish(struct ctl_table_header *head)
1375 {
1376         if (!head)
1377                 return;
1378         spin_lock(&sysctl_lock);
1379         unuse_table(head);
1380         spin_unlock(&sysctl_lock);
1381 }
1382
1383 static struct list_head *
1384 lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces)
1385 {
1386         struct list_head *header_list;
1387         header_list = &root->header_list;
1388         if (root->lookup)
1389                 header_list = root->lookup(root, namespaces);
1390         return header_list;
1391 }
1392
1393 struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces,
1394                                             struct ctl_table_header *prev)
1395 {
1396         struct ctl_table_root *root;
1397         struct list_head *header_list;
1398         struct ctl_table_header *head;
1399         struct list_head *tmp;
1400
1401         spin_lock(&sysctl_lock);
1402         if (prev) {
1403                 head = prev;
1404                 tmp = &prev->ctl_entry;
1405                 unuse_table(prev);
1406                 goto next;
1407         }
1408         tmp = &root_table_header.ctl_entry;
1409         for (;;) {
1410                 head = list_entry(tmp, struct ctl_table_header, ctl_entry);
1411
1412                 if (!use_table(head))
1413                         goto next;
1414                 spin_unlock(&sysctl_lock);
1415                 return head;
1416         next:
1417                 root = head->root;
1418                 tmp = tmp->next;
1419                 header_list = lookup_header_list(root, namespaces);
1420                 if (tmp != header_list)
1421                         continue;
1422
1423                 do {
1424                         root = list_entry(root->root_list.next,
1425                                         struct ctl_table_root, root_list);
1426                         if (root == &sysctl_table_root)
1427                                 goto out;
1428                         header_list = lookup_header_list(root, namespaces);
1429                 } while (list_empty(header_list));
1430                 tmp = header_list->next;
1431         }
1432 out:
1433         spin_unlock(&sysctl_lock);
1434         return NULL;
1435 }
1436
1437 struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev)
1438 {
1439         return __sysctl_head_next(current->nsproxy, prev);
1440 }
1441
1442 void register_sysctl_root(struct ctl_table_root *root)
1443 {
1444         spin_lock(&sysctl_lock);
1445         list_add_tail(&root->root_list, &sysctl_table_root.root_list);
1446         spin_unlock(&sysctl_lock);
1447 }
1448
1449 #ifdef CONFIG_SYSCTL_SYSCALL
1450 /* Perform the actual read/write of a sysctl table entry. */
1451 static int do_sysctl_strategy(struct ctl_table_root *root,
1452                         struct ctl_table *table,
1453                         int __user *name, int nlen,
1454                         void __user *oldval, size_t __user *oldlenp,
1455                         void __user *newval, size_t newlen)
1456 {
1457         int op = 0, rc;
1458
1459         if (oldval)
1460                 op |= 004;
1461         if (newval)
1462                 op |= 002;
1463         if (sysctl_perm(root, table, op))
1464                 return -EPERM;
1465
1466         if (table->strategy) {
1467                 rc = table->strategy(table, name, nlen, oldval, oldlenp,
1468                                      newval, newlen);
1469                 if (rc < 0)
1470                         return rc;
1471                 if (rc > 0)
1472                         return 0;
1473         }
1474
1475         /* If there is no strategy routine, or if the strategy returns
1476          * zero, proceed with automatic r/w */
1477         if (table->data && table->maxlen) {
1478                 rc = sysctl_data(table, name, nlen, oldval, oldlenp,
1479                                  newval, newlen);
1480                 if (rc < 0)
1481                         return rc;
1482         }
1483         return 0;
1484 }
1485
1486 static int parse_table(int __user *name, int nlen,
1487                        void __user *oldval, size_t __user *oldlenp,
1488                        void __user *newval, size_t newlen,
1489                        struct ctl_table_root *root,
1490                        struct ctl_table *table)
1491 {
1492         int n;
1493 repeat:
1494         if (!nlen)
1495                 return -ENOTDIR;
1496         if (get_user(n, name))
1497                 return -EFAULT;
1498         for ( ; table->ctl_name || table->procname; table++) {
1499                 if (!table->ctl_name)
1500                         continue;
1501                 if (n == table->ctl_name) {
1502                         int error;
1503                         if (table->child) {
1504                                 if (sysctl_perm(root, table, 001))
1505                                         return -EPERM;
1506                                 name++;
1507                                 nlen--;
1508                                 table = table->child;
1509                                 goto repeat;
1510                         }
1511                         error = do_sysctl_strategy(root, table, name, nlen,
1512                                                    oldval, oldlenp,
1513                                                    newval, newlen);
1514                         return error;
1515                 }
1516         }
1517         return -ENOTDIR;
1518 }
1519
1520 int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *oldlenp,
1521                void __user *newval, size_t newlen)
1522 {
1523         struct ctl_table_header *head;
1524         int error = -ENOTDIR;
1525
1526         if (nlen <= 0 || nlen >= CTL_MAXNAME)
1527                 return -ENOTDIR;
1528         if (oldval) {
1529                 int old_len;
1530                 if (!oldlenp || get_user(old_len, oldlenp))
1531                         return -EFAULT;
1532         }
1533
1534         for (head = sysctl_head_next(NULL); head;
1535                         head = sysctl_head_next(head)) {
1536                 error = parse_table(name, nlen, oldval, oldlenp, 
1537                                         newval, newlen,
1538                                         head->root, head->ctl_table);
1539                 if (error != -ENOTDIR) {
1540                         sysctl_head_finish(head);
1541                         break;
1542                 }
1543         }
1544         return error;
1545 }
1546
1547 asmlinkage long sys_sysctl(struct __sysctl_args __user *args)
1548 {
1549         struct __sysctl_args tmp;
1550         int error;
1551
1552         if (copy_from_user(&tmp, args, sizeof(tmp)))
1553                 return -EFAULT;
1554
1555         error = deprecated_sysctl_warning(&tmp);
1556         if (error)
1557                 goto out;
1558
1559         lock_kernel();
1560         error = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, tmp.oldlenp,
1561                           tmp.newval, tmp.newlen);
1562         unlock_kernel();
1563 out:
1564         return error;
1565 }
1566 #endif /* CONFIG_SYSCTL_SYSCALL */
1567
1568 /*
1569  * sysctl_perm does NOT grant the superuser all rights automatically, because
1570  * some sysctl variables are readonly even to root.
1571  */
1572
1573 static int test_perm(int mode, int op)
1574 {
1575         if (!current->euid)
1576                 mode >>= 6;
1577         else if (in_egroup_p(0))
1578                 mode >>= 3;
1579         if ((mode & op & 0007) == op)
1580                 return 0;
1581         return -EACCES;
1582 }
1583
1584 int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op)
1585 {
1586         int error;
1587         int mode;
1588
1589         error = security_sysctl(table, op);
1590         if (error)
1591                 return error;
1592
1593         if (root->permissions)
1594                 mode = root->permissions(root, current->nsproxy, table);
1595         else
1596                 mode = table->mode;
1597
1598         return test_perm(mode, op);
1599 }
1600
1601 static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table)
1602 {
1603         for (; table->ctl_name || table->procname; table++) {
1604                 table->parent = parent;
1605                 if (table->child)
1606                         sysctl_set_parent(table, table->child);
1607         }
1608 }
1609
1610 static __init int sysctl_init(void)
1611 {
1612         sysctl_set_parent(NULL, root_table);
1613 #ifdef CONFIG_SYSCTL_SYSCALL_CHECK
1614         {
1615                 int err;
1616                 err = sysctl_check_table(current->nsproxy, root_table);
1617         }
1618 #endif
1619         return 0;
1620 }
1621
1622 core_initcall(sysctl_init);
1623
1624 /**
1625  * __register_sysctl_paths - register a sysctl hierarchy
1626  * @root: List of sysctl headers to register on
1627  * @namespaces: Data to compute which lists of sysctl entries are visible
1628  * @path: The path to the directory the sysctl table is in.
1629  * @table: the top-level table structure
1630  *
1631  * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1632  * array. A completely 0 filled entry terminates the table.
1633  *
1634  * The members of the &struct ctl_table structure are used as follows:
1635  *
1636  * ctl_name - This is the numeric sysctl value used by sysctl(2). The number
1637  *            must be unique within that level of sysctl
1638  *
1639  * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not
1640  *            enter a sysctl file
1641  *
1642  * data - a pointer to data for use by proc_handler
1643  *
1644  * maxlen - the maximum size in bytes of the data
1645  *
1646  * mode - the file permissions for the /proc/sys file, and for sysctl(2)
1647  *
1648  * child - a pointer to the child sysctl table if this entry is a directory, or
1649  *         %NULL.
1650  *
1651  * proc_handler - the text handler routine (described below)
1652  *
1653  * strategy - the strategy routine (described below)
1654  *
1655  * de - for internal use by the sysctl routines
1656  *
1657  * extra1, extra2 - extra pointers usable by the proc handler routines
1658  *
1659  * Leaf nodes in the sysctl tree will be represented by a single file
1660  * under /proc; non-leaf nodes will be represented by directories.
1661  *
1662  * sysctl(2) can automatically manage read and write requests through
1663  * the sysctl table.  The data and maxlen fields of the ctl_table
1664  * struct enable minimal validation of the values being written to be
1665  * performed, and the mode field allows minimal authentication.
1666  *
1667  * More sophisticated management can be enabled by the provision of a
1668  * strategy routine with the table entry.  This will be called before
1669  * any automatic read or write of the data is performed.
1670  *
1671  * The strategy routine may return
1672  *
1673  * < 0 - Error occurred (error is passed to user process)
1674  *
1675  * 0   - OK - proceed with automatic read or write.
1676  *
1677  * > 0 - OK - read or write has been done by the strategy routine, so
1678  *       return immediately.
1679  *
1680  * There must be a proc_handler routine for any terminal nodes
1681  * mirrored under /proc/sys (non-terminals are handled by a built-in
1682  * directory handler).  Several default handlers are available to
1683  * cover common cases -
1684  *
1685  * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(),
1686  * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(), 
1687  * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax()
1688  *
1689  * It is the handler's job to read the input buffer from user memory
1690  * and process it. The handler should return 0 on success.
1691  *
1692  * This routine returns %NULL on a failure to register, and a pointer
1693  * to the table header on success.
1694  */
1695 struct ctl_table_header *__register_sysctl_paths(
1696         struct ctl_table_root *root,
1697         struct nsproxy *namespaces,
1698         const struct ctl_path *path, struct ctl_table *table)
1699 {
1700         struct list_head *header_list;
1701         struct ctl_table_header *header;
1702         struct ctl_table *new, **prevp;
1703         unsigned int n, npath;
1704
1705         /* Count the path components */
1706         for (npath = 0; path[npath].ctl_name || path[npath].procname; ++npath)
1707                 ;
1708
1709         /*
1710          * For each path component, allocate a 2-element ctl_table array.
1711          * The first array element will be filled with the sysctl entry
1712          * for this, the second will be the sentinel (ctl_name == 0).
1713          *
1714          * We allocate everything in one go so that we don't have to
1715          * worry about freeing additional memory in unregister_sysctl_table.
1716          */
1717         header = kzalloc(sizeof(struct ctl_table_header) +
1718                          (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL);
1719         if (!header)
1720                 return NULL;
1721
1722         new = (struct ctl_table *) (header + 1);
1723
1724         /* Now connect the dots */
1725         prevp = &header->ctl_table;
1726         for (n = 0; n < npath; ++n, ++path) {
1727                 /* Copy the procname */
1728                 new->procname = path->procname;
1729                 new->ctl_name = path->ctl_name;
1730                 new->mode     = 0555;
1731
1732                 *prevp = new;
1733                 prevp = &new->child;
1734
1735                 new += 2;
1736         }
1737         *prevp = table;
1738         header->ctl_table_arg = table;
1739
1740         INIT_LIST_HEAD(&header->ctl_entry);
1741         header->used = 0;
1742         header->unregistering = NULL;
1743         header->root = root;
1744         sysctl_set_parent(NULL, header->ctl_table);
1745 #ifdef CONFIG_SYSCTL_SYSCALL_CHECK
1746         if (sysctl_check_table(namespaces, header->ctl_table)) {
1747                 kfree(header);
1748                 return NULL;
1749         }
1750 #endif
1751         spin_lock(&sysctl_lock);
1752         header_list = lookup_header_list(root, namespaces);
1753         list_add_tail(&header->ctl_entry, header_list);
1754         spin_unlock(&sysctl_lock);
1755
1756         return header;
1757 }
1758
1759 /**
1760  * register_sysctl_table_path - register a sysctl table hierarchy
1761  * @path: The path to the directory the sysctl table is in.
1762  * @table: the top-level table structure
1763  *
1764  * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1765  * array. A completely 0 filled entry terminates the table.
1766  *
1767  * See __register_sysctl_paths for more details.
1768  */
1769 struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
1770                                                 struct ctl_table *table)
1771 {
1772         return __register_sysctl_paths(&sysctl_table_root, current->nsproxy,
1773                                         path, table);
1774 }
1775
1776 /**
1777  * register_sysctl_table - register a sysctl table hierarchy
1778  * @table: the top-level table structure
1779  *
1780  * Register a sysctl table hierarchy. @table should be a filled in ctl_table
1781  * array. A completely 0 filled entry terminates the table.
1782  *
1783  * See register_sysctl_paths for more details.
1784  */
1785 struct ctl_table_header *register_sysctl_table(struct ctl_table *table)
1786 {
1787         static const struct ctl_path null_path[] = { {} };
1788
1789         return register_sysctl_paths(null_path, table);
1790 }
1791
1792 /**
1793  * unregister_sysctl_table - unregister a sysctl table hierarchy
1794  * @header: the header returned from register_sysctl_table
1795  *
1796  * Unregisters the sysctl table and all children. proc entries may not
1797  * actually be removed until they are no longer used by anyone.
1798  */
1799 void unregister_sysctl_table(struct ctl_table_header * header)
1800 {
1801         might_sleep();
1802
1803         if (header == NULL)
1804                 return;
1805
1806         spin_lock(&sysctl_lock);
1807         start_unregistering(header);
1808         spin_unlock(&sysctl_lock);
1809         kfree(header);
1810 }
1811
1812 #else /* !CONFIG_SYSCTL */
1813 struct ctl_table_header *register_sysctl_table(struct ctl_table * table)
1814 {
1815         return NULL;
1816 }
1817
1818 struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
1819                                                     struct ctl_table *table)
1820 {
1821         return NULL;
1822 }
1823
1824 void unregister_sysctl_table(struct ctl_table_header * table)
1825 {
1826 }
1827
1828 #endif /* CONFIG_SYSCTL */
1829
1830 /*
1831  * /proc/sys support
1832  */
1833
1834 #ifdef CONFIG_PROC_SYSCTL
1835
1836 static int _proc_do_string(void* data, int maxlen, int write,
1837                            struct file *filp, void __user *buffer,
1838                            size_t *lenp, loff_t *ppos)
1839 {
1840         size_t len;
1841         char __user *p;
1842         char c;
1843
1844         if (!data || !maxlen || !*lenp) {
1845                 *lenp = 0;
1846                 return 0;
1847         }
1848
1849         if (write) {
1850                 len = 0;
1851                 p = buffer;
1852                 while (len < *lenp) {
1853                         if (get_user(c, p++))
1854                                 return -EFAULT;
1855                         if (c == 0 || c == '\n')
1856                                 break;
1857                         len++;
1858                 }
1859                 if (len >= maxlen)
1860                         len = maxlen-1;
1861                 if(copy_from_user(data, buffer, len))
1862                         return -EFAULT;
1863                 ((char *) data)[len] = 0;
1864                 *ppos += *lenp;
1865         } else {
1866                 len = strlen(data);
1867                 if (len > maxlen)
1868                         len = maxlen;
1869
1870                 if (*ppos > len) {
1871                         *lenp = 0;
1872                         return 0;
1873                 }
1874
1875                 data += *ppos;
1876                 len  -= *ppos;
1877
1878                 if (len > *lenp)
1879                         len = *lenp;
1880                 if (len)
1881                         if(copy_to_user(buffer, data, len))
1882                                 return -EFAULT;
1883                 if (len < *lenp) {
1884                         if(put_user('\n', ((char __user *) buffer) + len))
1885                                 return -EFAULT;
1886                         len++;
1887                 }
1888                 *lenp = len;
1889                 *ppos += len;
1890         }
1891         return 0;
1892 }
1893
1894 /**
1895  * proc_dostring - read a string sysctl
1896  * @table: the sysctl table
1897  * @write: %TRUE if this is a write to the sysctl file
1898  * @filp: the file structure
1899  * @buffer: the user buffer
1900  * @lenp: the size of the user buffer
1901  * @ppos: file position
1902  *
1903  * Reads/writes a string from/to the user buffer. If the kernel
1904  * buffer provided is not large enough to hold the string, the
1905  * string is truncated. The copied string is %NULL-terminated.
1906  * If the string is being read by the user process, it is copied
1907  * and a newline '\n' is added. It is truncated if the buffer is
1908  * not large enough.
1909  *
1910  * Returns 0 on success.
1911  */
1912 int proc_dostring(struct ctl_table *table, int write, struct file *filp,
1913                   void __user *buffer, size_t *lenp, loff_t *ppos)
1914 {
1915         return _proc_do_string(table->data, table->maxlen, write, filp,
1916                                buffer, lenp, ppos);
1917 }
1918
1919
1920 static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp,
1921                                  int *valp,
1922                                  int write, void *data)
1923 {
1924         if (write) {
1925                 *valp = *negp ? -*lvalp : *lvalp;
1926         } else {
1927                 int val = *valp;
1928                 if (val < 0) {
1929                         *negp = -1;
1930                         *lvalp = (unsigned long)-val;
1931                 } else {
1932                         *negp = 0;
1933                         *lvalp = (unsigned long)val;
1934                 }
1935         }
1936         return 0;
1937 }
1938
1939 static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table,
1940                   int write, struct file *filp, void __user *buffer,
1941                   size_t *lenp, loff_t *ppos,
1942                   int (*conv)(int *negp, unsigned long *lvalp, int *valp,
1943                               int write, void *data),
1944                   void *data)
1945 {
1946 #define TMPBUFLEN 21
1947         int *i, vleft, first=1, neg, val;
1948         unsigned long lval;
1949         size_t left, len;
1950         
1951         char buf[TMPBUFLEN], *p;
1952         char __user *s = buffer;
1953         
1954         if (!tbl_data || !table->maxlen || !*lenp ||
1955             (*ppos && !write)) {
1956                 *lenp = 0;
1957                 return 0;
1958         }
1959         
1960         i = (int *) tbl_data;
1961         vleft = table->maxlen / sizeof(*i);
1962         left = *lenp;
1963
1964         if (!conv)
1965                 conv = do_proc_dointvec_conv;
1966
1967         for (; left && vleft--; i++, first=0) {
1968                 if (write) {
1969                         while (left) {
1970                                 char c;
1971                                 if (get_user(c, s))
1972                                         return -EFAULT;
1973                                 if (!isspace(c))
1974                                         break;
1975                                 left--;
1976                                 s++;
1977                         }
1978                         if (!left)
1979                                 break;
1980                         neg = 0;
1981                         len = left;
1982                         if (len > sizeof(buf) - 1)
1983                                 len = sizeof(buf) - 1;
1984                         if (copy_from_user(buf, s, len))
1985                                 return -EFAULT;
1986                         buf[len] = 0;
1987                         p = buf;
1988                         if (*p == '-' && left > 1) {
1989                                 neg = 1;
1990                                 p++;
1991                         }
1992                         if (*p < '0' || *p > '9')
1993                                 break;
1994
1995                         lval = simple_strtoul(p, &p, 0);
1996
1997                         len = p-buf;
1998                         if ((len < left) && *p && !isspace(*p))
1999                                 break;
2000                         if (neg)
2001                                 val = -val;
2002                         s += len;
2003                         left -= len;
2004
2005                         if (conv(&neg, &lval, i, 1, data))
2006                                 break;
2007                 } else {
2008                         p = buf;
2009                         if (!first)
2010                                 *p++ = '\t';
2011         
2012                         if (conv(&neg, &lval, i, 0, data))
2013                                 break;
2014
2015                         sprintf(p, "%s%lu", neg ? "-" : "", lval);
2016                         len = strlen(buf);
2017                         if (len > left)
2018                                 len = left;
2019                         if(copy_to_user(s, buf, len))
2020                                 return -EFAULT;
2021                         left -= len;
2022                         s += len;
2023                 }
2024         }
2025
2026         if (!write && !first && left) {
2027                 if(put_user('\n', s))
2028                         return -EFAULT;
2029                 left--, s++;
2030         }
2031         if (write) {
2032                 while (left) {
2033                         char c;
2034                         if (get_user(c, s++))
2035                                 return -EFAULT;
2036                         if (!isspace(c))
2037                                 break;
2038                         left--;
2039                 }
2040         }
2041         if (write && first)
2042                 return -EINVAL;
2043         *lenp -= left;
2044         *ppos += *lenp;
2045         return 0;
2046 #undef TMPBUFLEN
2047 }
2048
2049 static int do_proc_dointvec(struct ctl_table *table, int write, struct file *filp,
2050                   void __user *buffer, size_t *lenp, loff_t *ppos,
2051                   int (*conv)(int *negp, unsigned long *lvalp, int *valp,
2052                               int write, void *data),
2053                   void *data)
2054 {
2055         return __do_proc_dointvec(table->data, table, write, filp,
2056                         buffer, lenp, ppos, conv, data);
2057 }
2058
2059 /**
2060  * proc_dointvec - read a vector of integers
2061  * @table: the sysctl table
2062  * @write: %TRUE if this is a write to the sysctl file
2063  * @filp: the file structure
2064  * @buffer: the user buffer
2065  * @lenp: the size of the user buffer
2066  * @ppos: file position
2067  *
2068  * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2069  * values from/to the user buffer, treated as an ASCII string. 
2070  *
2071  * Returns 0 on success.
2072  */
2073 int proc_dointvec(struct ctl_table *table, int write, struct file *filp,
2074                      void __user *buffer, size_t *lenp, loff_t *ppos)
2075 {
2076     return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
2077                             NULL,NULL);
2078 }
2079
2080 #define OP_SET  0
2081 #define OP_AND  1
2082 #define OP_OR   2
2083
2084 static int do_proc_dointvec_bset_conv(int *negp, unsigned long *lvalp,
2085                                       int *valp,
2086                                       int write, void *data)
2087 {
2088         int op = *(int *)data;
2089         if (write) {
2090                 int val = *negp ? -*lvalp : *lvalp;
2091                 switch(op) {
2092                 case OP_SET:    *valp = val; break;
2093                 case OP_AND:    *valp &= val; break;
2094                 case OP_OR:     *valp |= val; break;
2095                 }
2096         } else {
2097                 int val = *valp;
2098                 if (val < 0) {
2099                         *negp = -1;
2100                         *lvalp = (unsigned long)-val;
2101                 } else {
2102                         *negp = 0;
2103                         *lvalp = (unsigned long)val;
2104                 }
2105         }
2106         return 0;
2107 }
2108
2109 /*
2110  *      Taint values can only be increased
2111  */
2112 static int proc_dointvec_taint(struct ctl_table *table, int write, struct file *filp,
2113                                void __user *buffer, size_t *lenp, loff_t *ppos)
2114 {
2115         int op;
2116
2117         if (write && !capable(CAP_SYS_ADMIN))
2118                 return -EPERM;
2119
2120         op = OP_OR;
2121         return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
2122                                 do_proc_dointvec_bset_conv,&op);
2123 }
2124
2125 struct do_proc_dointvec_minmax_conv_param {
2126         int *min;
2127         int *max;
2128 };
2129
2130 static int do_proc_dointvec_minmax_conv(int *negp, unsigned long *lvalp, 
2131                                         int *valp, 
2132                                         int write, void *data)
2133 {
2134         struct do_proc_dointvec_minmax_conv_param *param = data;
2135         if (write) {
2136                 int val = *negp ? -*lvalp : *lvalp;
2137                 if ((param->min && *param->min > val) ||
2138                     (param->max && *param->max < val))
2139                         return -EINVAL;
2140                 *valp = val;
2141         } else {
2142                 int val = *valp;
2143                 if (val < 0) {
2144                         *negp = -1;
2145                         *lvalp = (unsigned long)-val;
2146                 } else {
2147                         *negp = 0;
2148                         *lvalp = (unsigned long)val;
2149                 }
2150         }
2151         return 0;
2152 }
2153
2154 /**
2155  * proc_dointvec_minmax - read a vector of integers with min/max values
2156  * @table: the sysctl table
2157  * @write: %TRUE if this is a write to the sysctl file
2158  * @filp: the file structure
2159  * @buffer: the user buffer
2160  * @lenp: the size of the user buffer
2161  * @ppos: file position
2162  *
2163  * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2164  * values from/to the user buffer, treated as an ASCII string.
2165  *
2166  * This routine will ensure the values are within the range specified by
2167  * table->extra1 (min) and table->extra2 (max).
2168  *
2169  * Returns 0 on success.
2170  */
2171 int proc_dointvec_minmax(struct ctl_table *table, int write, struct file *filp,
2172                   void __user *buffer, size_t *lenp, loff_t *ppos)
2173 {
2174         struct do_proc_dointvec_minmax_conv_param param = {
2175                 .min = (int *) table->extra1,
2176                 .max = (int *) table->extra2,
2177         };
2178         return do_proc_dointvec(table, write, filp, buffer, lenp, ppos,
2179                                 do_proc_dointvec_minmax_conv, &param);
2180 }
2181
2182 static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write,
2183                                      struct file *filp,
2184                                      void __user *buffer,
2185                                      size_t *lenp, loff_t *ppos,
2186                                      unsigned long convmul,
2187                                      unsigned long convdiv)
2188 {
2189 #define TMPBUFLEN 21
2190         unsigned long *i, *min, *max, val;
2191         int vleft, first=1, neg;
2192         size_t len, left;
2193         char buf[TMPBUFLEN], *p;
2194         char __user *s = buffer;
2195         
2196         if (!data || !table->maxlen || !*lenp ||
2197             (*ppos && !write)) {
2198                 *lenp = 0;
2199                 return 0;
2200         }
2201         
2202         i = (unsigned long *) data;
2203         min = (unsigned long *) table->extra1;
2204         max = (unsigned long *) table->extra2;
2205         vleft = table->maxlen / sizeof(unsigned long);
2206         left = *lenp;
2207         
2208         for (; left && vleft--; i++, min++, max++, first=0) {
2209                 if (write) {
2210                         while (left) {
2211                                 char c;
2212                                 if (get_user(c, s))
2213                                         return -EFAULT;
2214                                 if (!isspace(c))
2215                                         break;
2216                                 left--;
2217                                 s++;
2218                         }
2219                         if (!left)
2220                                 break;
2221                         neg = 0;
2222                         len = left;
2223                         if (len > TMPBUFLEN-1)
2224                                 len = TMPBUFLEN-1;
2225                         if (copy_from_user(buf, s, len))
2226                                 return -EFAULT;
2227                         buf[len] = 0;
2228                         p = buf;
2229                         if (*p == '-' && left > 1) {
2230                                 neg = 1;
2231                                 p++;
2232                         }
2233                         if (*p < '0' || *p > '9')
2234                                 break;
2235                         val = simple_strtoul(p, &p, 0) * convmul / convdiv ;
2236                         len = p-buf;
2237                         if ((len < left) && *p && !isspace(*p))
2238                                 break;
2239                         if (neg)
2240                                 val = -val;
2241                         s += len;
2242                         left -= len;
2243
2244                         if(neg)
2245                                 continue;
2246                         if ((min && val < *min) || (max && val > *max))
2247                                 continue;
2248                         *i = val;
2249                 } else {
2250                         p = buf;
2251                         if (!first)
2252                                 *p++ = '\t';
2253                         sprintf(p, "%lu", convdiv * (*i) / convmul);
2254                         len = strlen(buf);
2255                         if (len > left)
2256                                 len = left;
2257                         if(copy_to_user(s, buf, len))
2258                                 return -EFAULT;
2259                         left -= len;
2260                         s += len;
2261                 }
2262         }
2263
2264         if (!write && !first && left) {
2265                 if(put_user('\n', s))
2266                         return -EFAULT;
2267                 left--, s++;
2268         }
2269         if (write) {
2270                 while (left) {
2271                         char c;
2272                         if (get_user(c, s++))
2273                                 return -EFAULT;
2274                         if (!isspace(c))
2275                                 break;
2276                         left--;
2277                 }
2278         }
2279         if (write && first)
2280                 return -EINVAL;
2281         *lenp -= left;
2282         *ppos += *lenp;
2283         return 0;
2284 #undef TMPBUFLEN
2285 }
2286
2287 static int do_proc_doulongvec_minmax(struct ctl_table *table, int write,
2288                                      struct file *filp,
2289                                      void __user *buffer,
2290                                      size_t *lenp, loff_t *ppos,
2291                                      unsigned long convmul,
2292                                      unsigned long convdiv)
2293 {
2294         return __do_proc_doulongvec_minmax(table->data, table, write,
2295                         filp, buffer, lenp, ppos, convmul, convdiv);
2296 }
2297
2298 /**
2299  * proc_doulongvec_minmax - read a vector of long integers with min/max values
2300  * @table: the sysctl table
2301  * @write: %TRUE if this is a write to the sysctl file
2302  * @filp: the file structure
2303  * @buffer: the user buffer
2304  * @lenp: the size of the user buffer
2305  * @ppos: file position
2306  *
2307  * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2308  * values from/to the user buffer, treated as an ASCII string.
2309  *
2310  * This routine will ensure the values are within the range specified by
2311  * table->extra1 (min) and table->extra2 (max).
2312  *
2313  * Returns 0 on success.
2314  */
2315 int proc_doulongvec_minmax(struct ctl_table *table, int write, struct file *filp,
2316                            void __user *buffer, size_t *lenp, loff_t *ppos)
2317 {
2318     return do_proc_doulongvec_minmax(table, write, filp, buffer, lenp, ppos, 1l, 1l);
2319 }
2320
2321 /**
2322  * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
2323  * @table: the sysctl table
2324  * @write: %TRUE if this is a write to the sysctl file
2325  * @filp: the file structure
2326  * @buffer: the user buffer
2327  * @lenp: the size of the user buffer
2328  * @ppos: file position
2329  *
2330  * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2331  * values from/to the user buffer, treated as an ASCII string. The values
2332  * are treated as milliseconds, and converted to jiffies when they are stored.
2333  *
2334  * This routine will ensure the values are within the range specified by
2335  * table->extra1 (min) and table->extra2 (max).
2336  *
2337  * Returns 0 on success.
2338  */
2339 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2340                                       struct file *filp,
2341                                       void __user *buffer,
2342                                       size_t *lenp, loff_t *ppos)
2343 {
2344     return do_proc_doulongvec_minmax(table, write, filp, buffer,
2345                                      lenp, ppos, HZ, 1000l);
2346 }
2347
2348
2349 static int do_proc_dointvec_jiffies_conv(int *negp, unsigned long *lvalp,
2350                                          int *valp,
2351                                          int write, void *data)
2352 {
2353         if (write) {
2354                 if (*lvalp > LONG_MAX / HZ)
2355                         return 1;
2356                 *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ);
2357         } else {
2358                 int val = *valp;
2359                 unsigned long lval;
2360                 if (val < 0) {
2361                         *negp = -1;
2362                         lval = (unsigned long)-val;
2363                 } else {
2364                         *negp = 0;
2365                         lval = (unsigned long)val;
2366                 }
2367                 *lvalp = lval / HZ;
2368         }
2369         return 0;
2370 }
2371
2372 static int do_proc_dointvec_userhz_jiffies_conv(int *negp, unsigned long *lvalp,
2373                                                 int *valp,
2374                                                 int write, void *data)
2375 {
2376         if (write) {
2377                 if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ)
2378                         return 1;
2379                 *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp);
2380         } else {
2381                 int val = *valp;
2382                 unsigned long lval;
2383                 if (val < 0) {
2384                         *negp = -1;
2385                         lval = (unsigned long)-val;
2386                 } else {
2387                         *negp = 0;
2388                         lval = (unsigned long)val;
2389                 }
2390                 *lvalp = jiffies_to_clock_t(lval);
2391         }
2392         return 0;
2393 }
2394
2395 static int do_proc_dointvec_ms_jiffies_conv(int *negp, unsigned long *lvalp,
2396                                             int *valp,
2397                                             int write, void *data)
2398 {
2399         if (write) {
2400                 *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp);
2401         } else {
2402                 int val = *valp;
2403                 unsigned long lval;
2404                 if (val < 0) {
2405                         *negp = -1;
2406                         lval = (unsigned long)-val;
2407                 } else {
2408                         *negp = 0;
2409                         lval = (unsigned long)val;
2410                 }
2411                 *lvalp = jiffies_to_msecs(lval);
2412         }
2413         return 0;
2414 }
2415
2416 /**
2417  * proc_dointvec_jiffies - read a vector of integers as seconds
2418  * @table: the sysctl table
2419  * @write: %TRUE if this is a write to the sysctl file
2420  * @filp: the file structure
2421  * @buffer: the user buffer
2422  * @lenp: the size of the user buffer
2423  * @ppos: file position
2424  *
2425  * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2426  * values from/to the user buffer, treated as an ASCII string. 
2427  * The values read are assumed to be in seconds, and are converted into
2428  * jiffies.
2429  *
2430  * Returns 0 on success.
2431  */
2432 int proc_dointvec_jiffies(struct ctl_table *table, int write, struct file *filp,
2433                           void __user *buffer, size_t *lenp, loff_t *ppos)
2434 {
2435     return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
2436                             do_proc_dointvec_jiffies_conv,NULL);
2437 }
2438
2439 /**
2440  * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
2441  * @table: the sysctl table
2442  * @write: %TRUE if this is a write to the sysctl file
2443  * @filp: the file structure
2444  * @buffer: the user buffer
2445  * @lenp: the size of the user buffer
2446  * @ppos: pointer to the file position
2447  *
2448  * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2449  * values from/to the user buffer, treated as an ASCII string. 
2450  * The values read are assumed to be in 1/USER_HZ seconds, and 
2451  * are converted into jiffies.
2452  *
2453  * Returns 0 on success.
2454  */
2455 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, struct file *filp,
2456                                  void __user *buffer, size_t *lenp, loff_t *ppos)
2457 {
2458     return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
2459                             do_proc_dointvec_userhz_jiffies_conv,NULL);
2460 }
2461
2462 /**
2463  * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
2464  * @table: the sysctl table
2465  * @write: %TRUE if this is a write to the sysctl file
2466  * @filp: the file structure
2467  * @buffer: the user buffer
2468  * @lenp: the size of the user buffer
2469  * @ppos: file position
2470  * @ppos: the current position in the file
2471  *
2472  * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2473  * values from/to the user buffer, treated as an ASCII string. 
2474  * The values read are assumed to be in 1/1000 seconds, and 
2475  * are converted into jiffies.
2476  *
2477  * Returns 0 on success.
2478  */
2479 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, struct file *filp,
2480                              void __user *buffer, size_t *lenp, loff_t *ppos)
2481 {
2482         return do_proc_dointvec(table, write, filp, buffer, lenp, ppos,
2483                                 do_proc_dointvec_ms_jiffies_conv, NULL);
2484 }
2485
2486 static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp,
2487                            void __user *buffer, size_t *lenp, loff_t *ppos)
2488 {
2489         struct pid *new_pid;
2490         pid_t tmp;
2491         int r;
2492
2493         tmp = pid_vnr(cad_pid);
2494
2495         r = __do_proc_dointvec(&tmp, table, write, filp, buffer,
2496                                lenp, ppos, NULL, NULL);
2497         if (r || !write)
2498                 return r;
2499
2500         new_pid = find_get_pid(tmp);
2501         if (!new_pid)
2502                 return -ESRCH;
2503
2504         put_pid(xchg(&cad_pid, new_pid));
2505         return 0;
2506 }
2507
2508 #else /* CONFIG_PROC_FS */
2509
2510 int proc_dostring(struct ctl_table *table, int write, struct file *filp,
2511                   void __user *buffer, size_t *lenp, loff_t *ppos)
2512 {
2513         return -ENOSYS;
2514 }
2515
2516 int proc_dointvec(struct ctl_table *table, int write, struct file *filp,
2517                   void __user *buffer, size_t *lenp, loff_t *ppos)
2518 {
2519         return -ENOSYS;
2520 }
2521
2522 int proc_dointvec_minmax(struct ctl_table *table, int write, struct file *filp,
2523                     void __user *buffer, size_t *lenp, loff_t *ppos)
2524 {
2525         return -ENOSYS;
2526 }
2527
2528 int proc_dointvec_jiffies(struct ctl_table *table, int write, struct file *filp,
2529                     void __user *buffer, size_t *lenp, loff_t *ppos)
2530 {
2531         return -ENOSYS;
2532 }
2533
2534 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, struct file *filp,
2535                     void __user *buffer, size_t *lenp, loff_t *ppos)
2536 {
2537         return -ENOSYS;
2538 }
2539
2540 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, struct file *filp,
2541                              void __user *buffer, size_t *lenp, loff_t *ppos)
2542 {
2543         return -ENOSYS;
2544 }
2545
2546 int proc_doulongvec_minmax(struct ctl_table *table, int write, struct file *filp,
2547                     void __user *buffer, size_t *lenp, loff_t *ppos)
2548 {
2549         return -ENOSYS;
2550 }
2551
2552 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2553                                       struct file *filp,
2554                                       void __user *buffer,
2555                                       size_t *lenp, loff_t *ppos)
2556 {
2557     return -ENOSYS;
2558 }
2559
2560
2561 #endif /* CONFIG_PROC_FS */
2562
2563
2564 #ifdef CONFIG_SYSCTL_SYSCALL
2565 /*
2566  * General sysctl support routines 
2567  */
2568
2569 /* The generic sysctl data routine (used if no strategy routine supplied) */
2570 int sysctl_data(struct ctl_table *table, int __user *name, int nlen,
2571                 void __user *oldval, size_t __user *oldlenp,
2572                 void __user *newval, size_t newlen)
2573 {
2574         size_t len;
2575
2576         /* Get out of I don't have a variable */
2577         if (!table->data || !table->maxlen)
2578                 return -ENOTDIR;
2579
2580         if (oldval && oldlenp) {
2581                 if (get_user(len, oldlenp))
2582                         return -EFAULT;
2583                 if (len) {
2584                         if (len > table->maxlen)
2585                                 len = table->maxlen;
2586                         if (copy_to_user(oldval, table->data, len))
2587                                 return -EFAULT;
2588                         if (put_user(len, oldlenp))
2589                                 return -EFAULT;
2590                 }
2591         }
2592
2593         if (newval && newlen) {
2594                 if (newlen > table->maxlen)
2595                         newlen = table->maxlen;
2596
2597                 if (copy_from_user(table->data, newval, newlen))
2598                         return -EFAULT;
2599         }
2600         return 1;
2601 }
2602
2603 /* The generic string strategy routine: */
2604 int sysctl_string(struct ctl_table *table, int __user *name, int nlen,
2605                   void __user *oldval, size_t __user *oldlenp,
2606                   void __user *newval, size_t newlen)
2607 {
2608         if (!table->data || !table->maxlen) 
2609                 return -ENOTDIR;
2610         
2611         if (oldval && oldlenp) {
2612                 size_t bufsize;
2613                 if (get_user(bufsize, oldlenp))
2614                         return -EFAULT;
2615                 if (bufsize) {
2616                         size_t len = strlen(table->data), copied;
2617
2618                         /* This shouldn't trigger for a well-formed sysctl */
2619                         if (len > table->maxlen)
2620                                 len = table->maxlen;
2621
2622                         /* Copy up to a max of bufsize-1 bytes of the string */
2623                         copied = (len >= bufsize) ? bufsize - 1 : len;
2624
2625                         if (copy_to_user(oldval, table->data, copied) ||
2626                             put_user(0, (char __user *)(oldval + copied)))
2627                                 return -EFAULT;
2628                         if (put_user(len, oldlenp))
2629                                 return -EFAULT;
2630                 }
2631         }
2632         if (newval && newlen) {
2633                 size_t len = newlen;
2634                 if (len > table->maxlen)
2635                         len = table->maxlen;
2636                 if(copy_from_user(table->data, newval, len))
2637                         return -EFAULT;
2638                 if (len == table->maxlen)
2639                         len--;
2640                 ((char *) table->data)[len] = 0;
2641         }
2642         return 1;
2643 }
2644
2645 /*
2646  * This function makes sure that all of the integers in the vector
2647  * are between the minimum and maximum values given in the arrays
2648  * table->extra1 and table->extra2, respectively.
2649  */
2650 int sysctl_intvec(struct ctl_table *table, int __user *name, int nlen,
2651                 void __user *oldval, size_t __user *oldlenp,
2652                 void __user *newval, size_t newlen)
2653 {
2654
2655         if (newval && newlen) {
2656                 int __user *vec = (int __user *) newval;
2657                 int *min = (int *) table->extra1;
2658                 int *max = (int *) table->extra2;
2659                 size_t length;
2660                 int i;
2661
2662                 if (newlen % sizeof(int) != 0)
2663                         return -EINVAL;
2664
2665                 if (!table->extra1 && !table->extra2)
2666                         return 0;
2667
2668                 if (newlen > table->maxlen)
2669                         newlen = table->maxlen;
2670                 length = newlen / sizeof(int);
2671
2672                 for (i = 0; i < length; i++) {
2673                         int value;
2674                         if (get_user(value, vec + i))
2675                                 return -EFAULT;
2676                         if (min && value < min[i])
2677                                 return -EINVAL;
2678                         if (max && value > max[i])
2679                                 return -EINVAL;
2680                 }
2681         }
2682         return 0;
2683 }
2684
2685 /* Strategy function to convert jiffies to seconds */ 
2686 int sysctl_jiffies(struct ctl_table *table, int __user *name, int nlen,
2687                 void __user *oldval, size_t __user *oldlenp,
2688                 void __user *newval, size_t newlen)
2689 {
2690         if (oldval && oldlenp) {
2691                 size_t olen;
2692
2693                 if (get_user(olen, oldlenp))
2694                         return -EFAULT;
2695                 if (olen) {
2696                         int val;
2697
2698                         if (olen < sizeof(int))
2699                                 return -EINVAL;
2700
2701                         val = *(int *)(table->data) / HZ;
2702                         if (put_user(val, (int __user *)oldval))
2703                                 return -EFAULT;
2704                         if (put_user(sizeof(int), oldlenp))
2705                                 return -EFAULT;
2706                 }
2707         }
2708         if (newval && newlen) { 
2709                 int new;
2710                 if (newlen != sizeof(int))
2711                         return -EINVAL; 
2712                 if (get_user(new, (int __user *)newval))
2713                         return -EFAULT;
2714                 *(int *)(table->data) = new*HZ; 
2715         }
2716         return 1;
2717 }
2718
2719 /* Strategy function to convert jiffies to seconds */ 
2720 int sysctl_ms_jiffies(struct ctl_table *table, int __user *name, int nlen,
2721                 void __user *oldval, size_t __user *oldlenp,
2722                 void __user *newval, size_t newlen)
2723 {
2724         if (oldval && oldlenp) {
2725                 size_t olen;
2726
2727                 if (get_user(olen, oldlenp))
2728                         return -EFAULT;
2729                 if (olen) {
2730                         int val;
2731
2732                         if (olen < sizeof(int))
2733                                 return -EINVAL;
2734
2735                         val = jiffies_to_msecs(*(int *)(table->data));
2736                         if (put_user(val, (int __user *)oldval))
2737                                 return -EFAULT;
2738                         if (put_user(sizeof(int), oldlenp))
2739                                 return -EFAULT;
2740                 }
2741         }
2742         if (newval && newlen) { 
2743                 int new;
2744                 if (newlen != sizeof(int))
2745                         return -EINVAL; 
2746                 if (get_user(new, (int __user *)newval))
2747                         return -EFAULT;
2748                 *(int *)(table->data) = msecs_to_jiffies(new);
2749         }
2750         return 1;
2751 }
2752
2753
2754
2755 #else /* CONFIG_SYSCTL_SYSCALL */
2756
2757
2758 asmlinkage long sys_sysctl(struct __sysctl_args __user *args)
2759 {
2760         struct __sysctl_args tmp;
2761         int error;
2762
2763         if (copy_from_user(&tmp, args, sizeof(tmp)))
2764                 return -EFAULT;
2765
2766         error = deprecated_sysctl_warning(&tmp);
2767
2768         /* If no error reading the parameters then just -ENOSYS ... */
2769         if (!error)
2770                 error = -ENOSYS;
2771
2772         return error;
2773 }
2774
2775 int sysctl_data(struct ctl_table *table, int __user *name, int nlen,
2776                   void __user *oldval, size_t __user *oldlenp,
2777                   void __user *newval, size_t newlen)
2778 {
2779         return -ENOSYS;
2780 }
2781
2782 int sysctl_string(struct ctl_table *table, int __user *name, int nlen,
2783                   void __user *oldval, size_t __user *oldlenp,
2784                   void __user *newval, size_t newlen)
2785 {
2786         return -ENOSYS;
2787 }
2788
2789 int sysctl_intvec(struct ctl_table *table, int __user *name, int nlen,
2790                 void __user *oldval, size_t __user *oldlenp,
2791                 void __user *newval, size_t newlen)
2792 {
2793         return -ENOSYS;
2794 }
2795
2796 int sysctl_jiffies(struct ctl_table *table, int __user *name, int nlen,
2797                 void __user *oldval, size_t __user *oldlenp,
2798                 void __user *newval, size_t newlen)
2799 {
2800         return -ENOSYS;
2801 }
2802
2803 int sysctl_ms_jiffies(struct ctl_table *table, int __user *name, int nlen,
2804                 void __user *oldval, size_t __user *oldlenp,
2805                 void __user *newval, size_t newlen)
2806 {
2807         return -ENOSYS;
2808 }
2809
2810 #endif /* CONFIG_SYSCTL_SYSCALL */
2811
2812 static int deprecated_sysctl_warning(struct __sysctl_args *args)
2813 {
2814         static int msg_count;
2815         int name[CTL_MAXNAME];
2816         int i;
2817
2818         /* Check args->nlen. */
2819         if (args->nlen < 0 || args->nlen > CTL_MAXNAME)
2820                 return -ENOTDIR;
2821
2822         /* Read in the sysctl name for better debug message logging */
2823         for (i = 0; i < args->nlen; i++)
2824                 if (get_user(name[i], args->name + i))
2825                         return -EFAULT;
2826
2827         /* Ignore accesses to kernel.version */
2828         if ((args->nlen == 2) && (name[0] == CTL_KERN) && (name[1] == KERN_VERSION))
2829                 return 0;
2830
2831         if (msg_count < 5) {
2832                 msg_count++;
2833                 printk(KERN_INFO
2834                         "warning: process `%s' used the deprecated sysctl "
2835                         "system call with ", current->comm);
2836                 for (i = 0; i < args->nlen; i++)
2837                         printk("%d.", name[i]);
2838                 printk("\n");
2839         }
2840         return 0;
2841 }
2842
2843 /*
2844  * No sense putting this after each symbol definition, twice,
2845  * exception granted :-)
2846  */
2847 EXPORT_SYMBOL(proc_dointvec);
2848 EXPORT_SYMBOL(proc_dointvec_jiffies);
2849 EXPORT_SYMBOL(proc_dointvec_minmax);
2850 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
2851 EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
2852 EXPORT_SYMBOL(proc_dostring);
2853 EXPORT_SYMBOL(proc_doulongvec_minmax);
2854 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
2855 EXPORT_SYMBOL(register_sysctl_table);
2856 EXPORT_SYMBOL(register_sysctl_paths);
2857 EXPORT_SYMBOL(sysctl_intvec);
2858 EXPORT_SYMBOL(sysctl_jiffies);
2859 EXPORT_SYMBOL(sysctl_ms_jiffies);
2860 EXPORT_SYMBOL(sysctl_string);
2861 EXPORT_SYMBOL(sysctl_data);
2862 EXPORT_SYMBOL(unregister_sysctl_table);