Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
1da177e4 LT |
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> | |
72c2d582 | 27 | #include <linux/security.h> |
1da177e4 LT |
28 | #include <linux/ctype.h> |
29 | #include <linux/utsname.h> | |
1da177e4 | 30 | #include <linux/smp_lock.h> |
62239ac2 | 31 | #include <linux/fs.h> |
1da177e4 LT |
32 | #include <linux/init.h> |
33 | #include <linux/kernel.h> | |
0296b228 | 34 | #include <linux/kobject.h> |
20380731 | 35 | #include <linux/net.h> |
1da177e4 LT |
36 | #include <linux/sysrq.h> |
37 | #include <linux/highuid.h> | |
38 | #include <linux/writeback.h> | |
39 | #include <linux/hugetlb.h> | |
40 | #include <linux/security.h> | |
41 | #include <linux/initrd.h> | |
42 | #include <linux/times.h> | |
43 | #include <linux/limits.h> | |
44 | #include <linux/dcache.h> | |
45 | #include <linux/syscalls.h> | |
c255d844 PM |
46 | #include <linux/nfs_fs.h> |
47 | #include <linux/acpi.h> | |
10a0a8d4 | 48 | #include <linux/reboot.h> |
1da177e4 LT |
49 | |
50 | #include <asm/uaccess.h> | |
51 | #include <asm/processor.h> | |
52 | ||
29cbc78b AK |
53 | #ifdef CONFIG_X86 |
54 | #include <asm/nmi.h> | |
0741f4d2 | 55 | #include <asm/stacktrace.h> |
29cbc78b AK |
56 | #endif |
57 | ||
7058cb02 EB |
58 | static int deprecated_sysctl_warning(struct __sysctl_args *args); |
59 | ||
1da177e4 LT |
60 | #if defined(CONFIG_SYSCTL) |
61 | ||
62 | /* External variables not in a header file. */ | |
63 | extern int C_A_D; | |
45807a1d | 64 | extern int print_fatal_signals; |
1da177e4 LT |
65 | extern int sysctl_overcommit_memory; |
66 | extern int sysctl_overcommit_ratio; | |
fadd8fbd | 67 | extern int sysctl_panic_on_oom; |
fe071d7e | 68 | extern int sysctl_oom_kill_allocating_task; |
1da177e4 | 69 | extern int max_threads; |
1da177e4 | 70 | extern int core_uses_pid; |
d6e71144 | 71 | extern int suid_dumpable; |
1da177e4 | 72 | extern char core_pattern[]; |
1da177e4 LT |
73 | extern int pid_max; |
74 | extern int min_free_kbytes; | |
75 | extern int printk_ratelimit_jiffies; | |
76 | extern int printk_ratelimit_burst; | |
77 | extern int pid_max_min, pid_max_max; | |
9d0243bc | 78 | extern int sysctl_drop_caches; |
8ad4b1fb | 79 | extern int percpu_pagelist_fraction; |
bebfa101 | 80 | extern int compat_log; |
5096add8 | 81 | extern int maps_protect; |
77461ab3 | 82 | extern int sysctl_stat_interval; |
bdf4c48a | 83 | extern int audit_argv_kb; |
1da177e4 | 84 | |
c4f3b63f RT |
85 | /* Constants used for minimum and maximum */ |
86 | #ifdef CONFIG_DETECT_SOFTLOCKUP | |
87 | static int one = 1; | |
88 | static int sixty = 60; | |
89 | #endif | |
90 | ||
91 | #ifdef CONFIG_MMU | |
92 | static int two = 2; | |
93 | #endif | |
94 | ||
95 | static int zero; | |
96 | static int one_hundred = 100; | |
97 | ||
1da177e4 LT |
98 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
99 | static int maxolduid = 65535; | |
100 | static int minolduid; | |
8ad4b1fb | 101 | static int min_percpu_pagelist_fract = 8; |
1da177e4 LT |
102 | |
103 | static int ngroups_max = NGROUPS_MAX; | |
104 | ||
105 | #ifdef CONFIG_KMOD | |
106 | extern char modprobe_path[]; | |
107 | #endif | |
1da177e4 LT |
108 | #ifdef CONFIG_CHR_DEV_SG |
109 | extern int sg_big_buff; | |
110 | #endif | |
1da177e4 LT |
111 | |
112 | #ifdef __sparc__ | |
113 | extern char reboot_command []; | |
114 | extern int stop_a_enabled; | |
115 | extern int scons_pwroff; | |
116 | #endif | |
117 | ||
118 | #ifdef __hppa__ | |
119 | extern int pwrsw_enabled; | |
120 | extern int unaligned_enabled; | |
121 | #endif | |
122 | ||
347a8dc3 | 123 | #ifdef CONFIG_S390 |
1da177e4 LT |
124 | #ifdef CONFIG_MATHEMU |
125 | extern int sysctl_ieee_emulation_warnings; | |
126 | #endif | |
127 | extern int sysctl_userprocess_debug; | |
951f22d5 | 128 | extern int spin_retry; |
1da177e4 LT |
129 | #endif |
130 | ||
131 | extern int sysctl_hz_timer; | |
132 | ||
133 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
134 | extern int acct_parm[]; | |
135 | #endif | |
136 | ||
d2b176ed JS |
137 | #ifdef CONFIG_IA64 |
138 | extern int no_unaligned_warning; | |
139 | #endif | |
140 | ||
23f78d4a IM |
141 | #ifdef CONFIG_RT_MUTEXES |
142 | extern int max_lock_depth; | |
143 | #endif | |
144 | ||
b89a8171 EB |
145 | #ifdef CONFIG_SYSCTL_SYSCALL |
146 | static int parse_table(int __user *, int, void __user *, size_t __user *, | |
d8217f07 | 147 | void __user *, size_t, struct ctl_table *); |
b89a8171 EB |
148 | #endif |
149 | ||
6b49a257 | 150 | |
d6f8ff73 | 151 | #ifdef CONFIG_PROC_SYSCTL |
d8217f07 | 152 | static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp, |
9ec52099 | 153 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d8217f07 | 154 | static int proc_dointvec_taint(struct ctl_table *table, int write, struct file *filp, |
34f5a398 | 155 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 156 | #endif |
9ec52099 | 157 | |
d8217f07 | 158 | static struct ctl_table root_table[]; |
1da177e4 LT |
159 | static struct ctl_table_header root_table_header = |
160 | { root_table, LIST_HEAD_INIT(root_table_header.ctl_entry) }; | |
161 | ||
d8217f07 EB |
162 | static struct ctl_table kern_table[]; |
163 | static struct ctl_table vm_table[]; | |
164 | static struct ctl_table fs_table[]; | |
165 | static struct ctl_table debug_table[]; | |
166 | static struct ctl_table dev_table[]; | |
167 | extern struct ctl_table random_table[]; | |
2d9048e2 | 168 | #ifdef CONFIG_INOTIFY_USER |
d8217f07 | 169 | extern struct ctl_table inotify_table[]; |
0399cb08 | 170 | #endif |
1da177e4 LT |
171 | |
172 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
173 | int sysctl_legacy_va_layout; | |
174 | #endif | |
175 | ||
f20786ff PZ |
176 | extern int prove_locking; |
177 | extern int lock_stat; | |
9bc9a6bd | 178 | |
1da177e4 LT |
179 | /* The default sysctl tables: */ |
180 | ||
d8217f07 | 181 | static struct ctl_table root_table[] = { |
1da177e4 LT |
182 | { |
183 | .ctl_name = CTL_KERN, | |
184 | .procname = "kernel", | |
185 | .mode = 0555, | |
186 | .child = kern_table, | |
187 | }, | |
188 | { | |
189 | .ctl_name = CTL_VM, | |
190 | .procname = "vm", | |
191 | .mode = 0555, | |
192 | .child = vm_table, | |
193 | }, | |
194 | #ifdef CONFIG_NET | |
195 | { | |
196 | .ctl_name = CTL_NET, | |
197 | .procname = "net", | |
198 | .mode = 0555, | |
199 | .child = net_table, | |
200 | }, | |
201 | #endif | |
1da177e4 LT |
202 | { |
203 | .ctl_name = CTL_FS, | |
204 | .procname = "fs", | |
205 | .mode = 0555, | |
206 | .child = fs_table, | |
207 | }, | |
208 | { | |
209 | .ctl_name = CTL_DEBUG, | |
210 | .procname = "debug", | |
211 | .mode = 0555, | |
212 | .child = debug_table, | |
213 | }, | |
214 | { | |
215 | .ctl_name = CTL_DEV, | |
216 | .procname = "dev", | |
217 | .mode = 0555, | |
218 | .child = dev_table, | |
219 | }, | |
2be7fe07 AM |
220 | /* |
221 | * NOTE: do not add new entries to this table unless you have read | |
222 | * Documentation/sysctl/ctl_unnumbered.txt | |
223 | */ | |
1da177e4 LT |
224 | { .ctl_name = 0 } |
225 | }; | |
226 | ||
77e54a1f | 227 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
228 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
229 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
230 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
231 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
77e54a1f IM |
232 | #endif |
233 | ||
d8217f07 | 234 | static struct ctl_table kern_table[] = { |
77e54a1f IM |
235 | #ifdef CONFIG_SCHED_DEBUG |
236 | { | |
237 | .ctl_name = CTL_UNNUMBERED, | |
b2be5e96 PZ |
238 | .procname = "sched_min_granularity_ns", |
239 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
240 | .maxlen = sizeof(unsigned int), |
241 | .mode = 0644, | |
b2be5e96 PZ |
242 | .proc_handler = &sched_nr_latency_handler, |
243 | .strategy = &sysctl_intvec, | |
244 | .extra1 = &min_sched_granularity_ns, | |
245 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 246 | }, |
21805085 PZ |
247 | { |
248 | .ctl_name = CTL_UNNUMBERED, | |
249 | .procname = "sched_latency_ns", | |
250 | .data = &sysctl_sched_latency, | |
251 | .maxlen = sizeof(unsigned int), | |
252 | .mode = 0644, | |
b2be5e96 | 253 | .proc_handler = &sched_nr_latency_handler, |
21805085 PZ |
254 | .strategy = &sysctl_intvec, |
255 | .extra1 = &min_sched_granularity_ns, | |
256 | .extra2 = &max_sched_granularity_ns, | |
257 | }, | |
77e54a1f IM |
258 | { |
259 | .ctl_name = CTL_UNNUMBERED, | |
260 | .procname = "sched_wakeup_granularity_ns", | |
261 | .data = &sysctl_sched_wakeup_granularity, | |
262 | .maxlen = sizeof(unsigned int), | |
263 | .mode = 0644, | |
264 | .proc_handler = &proc_dointvec_minmax, | |
265 | .strategy = &sysctl_intvec, | |
266 | .extra1 = &min_wakeup_granularity_ns, | |
267 | .extra2 = &max_wakeup_granularity_ns, | |
268 | }, | |
269 | { | |
270 | .ctl_name = CTL_UNNUMBERED, | |
271 | .procname = "sched_batch_wakeup_granularity_ns", | |
272 | .data = &sysctl_sched_batch_wakeup_granularity, | |
273 | .maxlen = sizeof(unsigned int), | |
274 | .mode = 0644, | |
275 | .proc_handler = &proc_dointvec_minmax, | |
276 | .strategy = &sysctl_intvec, | |
277 | .extra1 = &min_wakeup_granularity_ns, | |
278 | .extra2 = &max_wakeup_granularity_ns, | |
279 | }, | |
77e54a1f IM |
280 | { |
281 | .ctl_name = CTL_UNNUMBERED, | |
282 | .procname = "sched_child_runs_first", | |
283 | .data = &sysctl_sched_child_runs_first, | |
284 | .maxlen = sizeof(unsigned int), | |
285 | .mode = 0644, | |
286 | .proc_handler = &proc_dointvec, | |
287 | }, | |
1fc84aaa PZ |
288 | { |
289 | .ctl_name = CTL_UNNUMBERED, | |
290 | .procname = "sched_features", | |
291 | .data = &sysctl_sched_features, | |
292 | .maxlen = sizeof(unsigned int), | |
293 | .mode = 0644, | |
294 | .proc_handler = &proc_dointvec, | |
295 | }, | |
da84d961 IM |
296 | { |
297 | .ctl_name = CTL_UNNUMBERED, | |
298 | .procname = "sched_migration_cost", | |
299 | .data = &sysctl_sched_migration_cost, | |
300 | .maxlen = sizeof(unsigned int), | |
301 | .mode = 0644, | |
302 | .proc_handler = &proc_dointvec, | |
303 | }, | |
b82d9fdd PZ |
304 | { |
305 | .ctl_name = CTL_UNNUMBERED, | |
306 | .procname = "sched_nr_migrate", | |
307 | .data = &sysctl_sched_nr_migrate, | |
308 | .maxlen = sizeof(unsigned int), | |
fa85ae24 PZ |
309 | .mode = 0644, |
310 | .proc_handler = &proc_dointvec, | |
311 | }, | |
312 | { | |
313 | .ctl_name = CTL_UNNUMBERED, | |
314 | .procname = "sched_rt_period_ms", | |
315 | .data = &sysctl_sched_rt_period, | |
316 | .maxlen = sizeof(unsigned int), | |
317 | .mode = 0644, | |
318 | .proc_handler = &proc_dointvec, | |
319 | }, | |
320 | { | |
321 | .ctl_name = CTL_UNNUMBERED, | |
322 | .procname = "sched_rt_ratio", | |
323 | .data = &sysctl_sched_rt_ratio, | |
324 | .maxlen = sizeof(unsigned int), | |
325 | .mode = 0644, | |
b82d9fdd PZ |
326 | .proc_handler = &proc_dointvec, |
327 | }, | |
6b2d7700 SV |
328 | #if defined(CONFIG_FAIR_GROUP_SCHED) && defined(CONFIG_SMP) |
329 | { | |
330 | .ctl_name = CTL_UNNUMBERED, | |
331 | .procname = "sched_min_bal_int_shares", | |
332 | .data = &sysctl_sched_min_bal_int_shares, | |
333 | .maxlen = sizeof(unsigned int), | |
334 | .mode = 0644, | |
335 | .proc_handler = &proc_dointvec, | |
336 | }, | |
337 | { | |
338 | .ctl_name = CTL_UNNUMBERED, | |
339 | .procname = "sched_max_bal_int_shares", | |
340 | .data = &sysctl_sched_max_bal_int_shares, | |
341 | .maxlen = sizeof(unsigned int), | |
342 | .mode = 0644, | |
343 | .proc_handler = &proc_dointvec, | |
344 | }, | |
345 | #endif | |
1fc84aaa | 346 | #endif |
1799e35d IM |
347 | { |
348 | .ctl_name = CTL_UNNUMBERED, | |
349 | .procname = "sched_compat_yield", | |
350 | .data = &sysctl_sched_compat_yield, | |
351 | .maxlen = sizeof(unsigned int), | |
352 | .mode = 0644, | |
353 | .proc_handler = &proc_dointvec, | |
354 | }, | |
f20786ff PZ |
355 | #ifdef CONFIG_PROVE_LOCKING |
356 | { | |
357 | .ctl_name = CTL_UNNUMBERED, | |
358 | .procname = "prove_locking", | |
359 | .data = &prove_locking, | |
360 | .maxlen = sizeof(int), | |
361 | .mode = 0644, | |
362 | .proc_handler = &proc_dointvec, | |
363 | }, | |
364 | #endif | |
365 | #ifdef CONFIG_LOCK_STAT | |
366 | { | |
367 | .ctl_name = CTL_UNNUMBERED, | |
368 | .procname = "lock_stat", | |
369 | .data = &lock_stat, | |
370 | .maxlen = sizeof(int), | |
371 | .mode = 0644, | |
372 | .proc_handler = &proc_dointvec, | |
373 | }, | |
77e54a1f | 374 | #endif |
1da177e4 LT |
375 | { |
376 | .ctl_name = KERN_PANIC, | |
377 | .procname = "panic", | |
378 | .data = &panic_timeout, | |
379 | .maxlen = sizeof(int), | |
380 | .mode = 0644, | |
381 | .proc_handler = &proc_dointvec, | |
382 | }, | |
383 | { | |
384 | .ctl_name = KERN_CORE_USES_PID, | |
385 | .procname = "core_uses_pid", | |
386 | .data = &core_uses_pid, | |
387 | .maxlen = sizeof(int), | |
388 | .mode = 0644, | |
389 | .proc_handler = &proc_dointvec, | |
390 | }, | |
bdf4c48a PZ |
391 | #ifdef CONFIG_AUDITSYSCALL |
392 | { | |
393 | .ctl_name = CTL_UNNUMBERED, | |
394 | .procname = "audit_argv_kb", | |
395 | .data = &audit_argv_kb, | |
396 | .maxlen = sizeof(int), | |
397 | .mode = 0644, | |
398 | .proc_handler = &proc_dointvec, | |
399 | }, | |
400 | #endif | |
1da177e4 LT |
401 | { |
402 | .ctl_name = KERN_CORE_PATTERN, | |
403 | .procname = "core_pattern", | |
404 | .data = core_pattern, | |
71ce92f3 | 405 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 LT |
406 | .mode = 0644, |
407 | .proc_handler = &proc_dostring, | |
408 | .strategy = &sysctl_string, | |
409 | }, | |
34f5a398 | 410 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 411 | { |
1da177e4 LT |
412 | .procname = "tainted", |
413 | .data = &tainted, | |
414 | .maxlen = sizeof(int), | |
34f5a398 TT |
415 | .mode = 0644, |
416 | .proc_handler = &proc_dointvec_taint, | |
1da177e4 | 417 | }, |
34f5a398 | 418 | #endif |
72c2d582 | 419 | #ifdef CONFIG_SECURITY_CAPABILITIES |
1da177e4 | 420 | { |
1da177e4 LT |
421 | .procname = "cap-bound", |
422 | .data = &cap_bset, | |
423 | .maxlen = sizeof(kernel_cap_t), | |
424 | .mode = 0600, | |
425 | .proc_handler = &proc_dointvec_bset, | |
426 | }, | |
72c2d582 | 427 | #endif /* def CONFIG_SECURITY_CAPABILITIES */ |
1da177e4 LT |
428 | #ifdef CONFIG_BLK_DEV_INITRD |
429 | { | |
430 | .ctl_name = KERN_REALROOTDEV, | |
431 | .procname = "real-root-dev", | |
432 | .data = &real_root_dev, | |
433 | .maxlen = sizeof(int), | |
434 | .mode = 0644, | |
435 | .proc_handler = &proc_dointvec, | |
436 | }, | |
437 | #endif | |
45807a1d IM |
438 | { |
439 | .ctl_name = CTL_UNNUMBERED, | |
440 | .procname = "print-fatal-signals", | |
441 | .data = &print_fatal_signals, | |
442 | .maxlen = sizeof(int), | |
443 | .mode = 0644, | |
444 | .proc_handler = &proc_dointvec, | |
445 | }, | |
1da177e4 LT |
446 | #ifdef __sparc__ |
447 | { | |
448 | .ctl_name = KERN_SPARC_REBOOT, | |
449 | .procname = "reboot-cmd", | |
450 | .data = reboot_command, | |
451 | .maxlen = 256, | |
452 | .mode = 0644, | |
453 | .proc_handler = &proc_dostring, | |
454 | .strategy = &sysctl_string, | |
455 | }, | |
456 | { | |
457 | .ctl_name = KERN_SPARC_STOP_A, | |
458 | .procname = "stop-a", | |
459 | .data = &stop_a_enabled, | |
460 | .maxlen = sizeof (int), | |
461 | .mode = 0644, | |
462 | .proc_handler = &proc_dointvec, | |
463 | }, | |
464 | { | |
465 | .ctl_name = KERN_SPARC_SCONS_PWROFF, | |
466 | .procname = "scons-poweroff", | |
467 | .data = &scons_pwroff, | |
468 | .maxlen = sizeof (int), | |
469 | .mode = 0644, | |
470 | .proc_handler = &proc_dointvec, | |
471 | }, | |
472 | #endif | |
473 | #ifdef __hppa__ | |
474 | { | |
475 | .ctl_name = KERN_HPPA_PWRSW, | |
476 | .procname = "soft-power", | |
477 | .data = &pwrsw_enabled, | |
478 | .maxlen = sizeof (int), | |
479 | .mode = 0644, | |
480 | .proc_handler = &proc_dointvec, | |
481 | }, | |
482 | { | |
483 | .ctl_name = KERN_HPPA_UNALIGNED, | |
484 | .procname = "unaligned-trap", | |
485 | .data = &unaligned_enabled, | |
486 | .maxlen = sizeof (int), | |
487 | .mode = 0644, | |
488 | .proc_handler = &proc_dointvec, | |
489 | }, | |
490 | #endif | |
491 | { | |
492 | .ctl_name = KERN_CTLALTDEL, | |
493 | .procname = "ctrl-alt-del", | |
494 | .data = &C_A_D, | |
495 | .maxlen = sizeof(int), | |
496 | .mode = 0644, | |
497 | .proc_handler = &proc_dointvec, | |
498 | }, | |
499 | { | |
500 | .ctl_name = KERN_PRINTK, | |
501 | .procname = "printk", | |
502 | .data = &console_loglevel, | |
503 | .maxlen = 4*sizeof(int), | |
504 | .mode = 0644, | |
505 | .proc_handler = &proc_dointvec, | |
506 | }, | |
507 | #ifdef CONFIG_KMOD | |
508 | { | |
509 | .ctl_name = KERN_MODPROBE, | |
510 | .procname = "modprobe", | |
511 | .data = &modprobe_path, | |
512 | .maxlen = KMOD_PATH_LEN, | |
513 | .mode = 0644, | |
514 | .proc_handler = &proc_dostring, | |
515 | .strategy = &sysctl_string, | |
516 | }, | |
517 | #endif | |
57ae2508 | 518 | #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET) |
1da177e4 LT |
519 | { |
520 | .ctl_name = KERN_HOTPLUG, | |
521 | .procname = "hotplug", | |
312c004d KS |
522 | .data = &uevent_helper, |
523 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 LT |
524 | .mode = 0644, |
525 | .proc_handler = &proc_dostring, | |
526 | .strategy = &sysctl_string, | |
527 | }, | |
528 | #endif | |
529 | #ifdef CONFIG_CHR_DEV_SG | |
530 | { | |
531 | .ctl_name = KERN_SG_BIG_BUFF, | |
532 | .procname = "sg-big-buff", | |
533 | .data = &sg_big_buff, | |
534 | .maxlen = sizeof (int), | |
535 | .mode = 0444, | |
536 | .proc_handler = &proc_dointvec, | |
537 | }, | |
538 | #endif | |
539 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
540 | { | |
541 | .ctl_name = KERN_ACCT, | |
542 | .procname = "acct", | |
543 | .data = &acct_parm, | |
544 | .maxlen = 3*sizeof(int), | |
545 | .mode = 0644, | |
546 | .proc_handler = &proc_dointvec, | |
547 | }, | |
548 | #endif | |
1da177e4 LT |
549 | #ifdef CONFIG_MAGIC_SYSRQ |
550 | { | |
551 | .ctl_name = KERN_SYSRQ, | |
552 | .procname = "sysrq", | |
5d6f647f | 553 | .data = &__sysrq_enabled, |
1da177e4 LT |
554 | .maxlen = sizeof (int), |
555 | .mode = 0644, | |
556 | .proc_handler = &proc_dointvec, | |
557 | }, | |
558 | #endif | |
d6f8ff73 | 559 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 560 | { |
1da177e4 | 561 | .procname = "cad_pid", |
9ec52099 | 562 | .data = NULL, |
1da177e4 LT |
563 | .maxlen = sizeof (int), |
564 | .mode = 0600, | |
9ec52099 | 565 | .proc_handler = &proc_do_cad_pid, |
1da177e4 | 566 | }, |
d6f8ff73 | 567 | #endif |
1da177e4 LT |
568 | { |
569 | .ctl_name = KERN_MAX_THREADS, | |
570 | .procname = "threads-max", | |
571 | .data = &max_threads, | |
572 | .maxlen = sizeof(int), | |
573 | .mode = 0644, | |
574 | .proc_handler = &proc_dointvec, | |
575 | }, | |
576 | { | |
577 | .ctl_name = KERN_RANDOM, | |
578 | .procname = "random", | |
579 | .mode = 0555, | |
580 | .child = random_table, | |
581 | }, | |
1da177e4 LT |
582 | { |
583 | .ctl_name = KERN_OVERFLOWUID, | |
584 | .procname = "overflowuid", | |
585 | .data = &overflowuid, | |
586 | .maxlen = sizeof(int), | |
587 | .mode = 0644, | |
588 | .proc_handler = &proc_dointvec_minmax, | |
589 | .strategy = &sysctl_intvec, | |
590 | .extra1 = &minolduid, | |
591 | .extra2 = &maxolduid, | |
592 | }, | |
593 | { | |
594 | .ctl_name = KERN_OVERFLOWGID, | |
595 | .procname = "overflowgid", | |
596 | .data = &overflowgid, | |
597 | .maxlen = sizeof(int), | |
598 | .mode = 0644, | |
599 | .proc_handler = &proc_dointvec_minmax, | |
600 | .strategy = &sysctl_intvec, | |
601 | .extra1 = &minolduid, | |
602 | .extra2 = &maxolduid, | |
603 | }, | |
347a8dc3 | 604 | #ifdef CONFIG_S390 |
1da177e4 LT |
605 | #ifdef CONFIG_MATHEMU |
606 | { | |
607 | .ctl_name = KERN_IEEE_EMULATION_WARNINGS, | |
608 | .procname = "ieee_emulation_warnings", | |
609 | .data = &sysctl_ieee_emulation_warnings, | |
610 | .maxlen = sizeof(int), | |
611 | .mode = 0644, | |
612 | .proc_handler = &proc_dointvec, | |
613 | }, | |
614 | #endif | |
615 | #ifdef CONFIG_NO_IDLE_HZ | |
616 | { | |
617 | .ctl_name = KERN_HZ_TIMER, | |
618 | .procname = "hz_timer", | |
619 | .data = &sysctl_hz_timer, | |
620 | .maxlen = sizeof(int), | |
621 | .mode = 0644, | |
622 | .proc_handler = &proc_dointvec, | |
623 | }, | |
624 | #endif | |
625 | { | |
626 | .ctl_name = KERN_S390_USER_DEBUG_LOGGING, | |
627 | .procname = "userprocess_debug", | |
628 | .data = &sysctl_userprocess_debug, | |
629 | .maxlen = sizeof(int), | |
630 | .mode = 0644, | |
631 | .proc_handler = &proc_dointvec, | |
632 | }, | |
633 | #endif | |
634 | { | |
635 | .ctl_name = KERN_PIDMAX, | |
636 | .procname = "pid_max", | |
637 | .data = &pid_max, | |
638 | .maxlen = sizeof (int), | |
639 | .mode = 0644, | |
640 | .proc_handler = &proc_dointvec_minmax, | |
641 | .strategy = sysctl_intvec, | |
642 | .extra1 = &pid_max_min, | |
643 | .extra2 = &pid_max_max, | |
644 | }, | |
645 | { | |
646 | .ctl_name = KERN_PANIC_ON_OOPS, | |
647 | .procname = "panic_on_oops", | |
648 | .data = &panic_on_oops, | |
649 | .maxlen = sizeof(int), | |
650 | .mode = 0644, | |
651 | .proc_handler = &proc_dointvec, | |
652 | }, | |
653 | { | |
654 | .ctl_name = KERN_PRINTK_RATELIMIT, | |
655 | .procname = "printk_ratelimit", | |
656 | .data = &printk_ratelimit_jiffies, | |
657 | .maxlen = sizeof(int), | |
658 | .mode = 0644, | |
659 | .proc_handler = &proc_dointvec_jiffies, | |
660 | .strategy = &sysctl_jiffies, | |
661 | }, | |
662 | { | |
663 | .ctl_name = KERN_PRINTK_RATELIMIT_BURST, | |
664 | .procname = "printk_ratelimit_burst", | |
665 | .data = &printk_ratelimit_burst, | |
666 | .maxlen = sizeof(int), | |
667 | .mode = 0644, | |
668 | .proc_handler = &proc_dointvec, | |
669 | }, | |
670 | { | |
671 | .ctl_name = KERN_NGROUPS_MAX, | |
672 | .procname = "ngroups_max", | |
673 | .data = &ngroups_max, | |
674 | .maxlen = sizeof (int), | |
675 | .mode = 0444, | |
676 | .proc_handler = &proc_dointvec, | |
677 | }, | |
678 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
679 | { | |
680 | .ctl_name = KERN_UNKNOWN_NMI_PANIC, | |
681 | .procname = "unknown_nmi_panic", | |
682 | .data = &unknown_nmi_panic, | |
683 | .maxlen = sizeof (int), | |
684 | .mode = 0644, | |
2fbe7b25 | 685 | .proc_handler = &proc_dointvec, |
1da177e4 | 686 | }, |
407984f1 | 687 | { |
407984f1 DZ |
688 | .procname = "nmi_watchdog", |
689 | .data = &nmi_watchdog_enabled, | |
690 | .maxlen = sizeof (int), | |
691 | .mode = 0644, | |
692 | .proc_handler = &proc_nmi_enabled, | |
1da177e4 LT |
693 | }, |
694 | #endif | |
695 | #if defined(CONFIG_X86) | |
8da5adda DZ |
696 | { |
697 | .ctl_name = KERN_PANIC_ON_NMI, | |
698 | .procname = "panic_on_unrecovered_nmi", | |
699 | .data = &panic_on_unrecovered_nmi, | |
700 | .maxlen = sizeof(int), | |
701 | .mode = 0644, | |
702 | .proc_handler = &proc_dointvec, | |
703 | }, | |
1da177e4 LT |
704 | { |
705 | .ctl_name = KERN_BOOTLOADER_TYPE, | |
706 | .procname = "bootloader_type", | |
707 | .data = &bootloader_type, | |
708 | .maxlen = sizeof (int), | |
709 | .mode = 0444, | |
710 | .proc_handler = &proc_dointvec, | |
711 | }, | |
0741f4d2 CE |
712 | { |
713 | .ctl_name = CTL_UNNUMBERED, | |
714 | .procname = "kstack_depth_to_print", | |
715 | .data = &kstack_depth_to_print, | |
716 | .maxlen = sizeof(int), | |
717 | .mode = 0644, | |
718 | .proc_handler = &proc_dointvec, | |
719 | }, | |
1da177e4 | 720 | #endif |
7a9166e3 | 721 | #if defined(CONFIG_MMU) |
1da177e4 LT |
722 | { |
723 | .ctl_name = KERN_RANDOMIZE, | |
724 | .procname = "randomize_va_space", | |
725 | .data = &randomize_va_space, | |
726 | .maxlen = sizeof(int), | |
727 | .mode = 0644, | |
728 | .proc_handler = &proc_dointvec, | |
729 | }, | |
7a9166e3 | 730 | #endif |
0152fb37 | 731 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 MS |
732 | { |
733 | .ctl_name = KERN_SPIN_RETRY, | |
734 | .procname = "spin_retry", | |
735 | .data = &spin_retry, | |
736 | .maxlen = sizeof (int), | |
737 | .mode = 0644, | |
738 | .proc_handler = &proc_dointvec, | |
739 | }, | |
c255d844 | 740 | #endif |
673d5b43 | 741 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 742 | { |
c255d844 | 743 | .procname = "acpi_video_flags", |
77afcf78 | 744 | .data = &acpi_realmode_flags, |
c255d844 PM |
745 | .maxlen = sizeof (unsigned long), |
746 | .mode = 0644, | |
7f99f06f | 747 | .proc_handler = &proc_doulongvec_minmax, |
c255d844 | 748 | }, |
d2b176ed JS |
749 | #endif |
750 | #ifdef CONFIG_IA64 | |
751 | { | |
752 | .ctl_name = KERN_IA64_UNALIGNED, | |
753 | .procname = "ignore-unaligned-usertrap", | |
754 | .data = &no_unaligned_warning, | |
755 | .maxlen = sizeof (int), | |
756 | .mode = 0644, | |
757 | .proc_handler = &proc_dointvec, | |
758 | }, | |
bebfa101 | 759 | #endif |
c4f3b63f RT |
760 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
761 | { | |
762 | .ctl_name = CTL_UNNUMBERED, | |
763 | .procname = "softlockup_thresh", | |
764 | .data = &softlockup_thresh, | |
765 | .maxlen = sizeof(int), | |
766 | .mode = 0644, | |
767 | .proc_handler = &proc_dointvec_minmax, | |
768 | .strategy = &sysctl_intvec, | |
769 | .extra1 = &one, | |
770 | .extra2 = &sixty, | |
771 | }, | |
82a1fcb9 IM |
772 | { |
773 | .ctl_name = CTL_UNNUMBERED, | |
774 | .procname = "hung_task_check_count", | |
775 | .data = &sysctl_hung_task_check_count, | |
776 | .maxlen = sizeof(int), | |
777 | .mode = 0644, | |
778 | .proc_handler = &proc_dointvec_minmax, | |
779 | .strategy = &sysctl_intvec, | |
780 | }, | |
781 | { | |
782 | .ctl_name = CTL_UNNUMBERED, | |
783 | .procname = "hung_task_timeout_secs", | |
784 | .data = &sysctl_hung_task_timeout_secs, | |
785 | .maxlen = sizeof(int), | |
786 | .mode = 0644, | |
787 | .proc_handler = &proc_dointvec_minmax, | |
788 | .strategy = &sysctl_intvec, | |
789 | }, | |
790 | { | |
791 | .ctl_name = CTL_UNNUMBERED, | |
792 | .procname = "hung_task_warnings", | |
793 | .data = &sysctl_hung_task_warnings, | |
794 | .maxlen = sizeof(int), | |
795 | .mode = 0644, | |
796 | .proc_handler = &proc_dointvec_minmax, | |
797 | .strategy = &sysctl_intvec, | |
798 | }, | |
c4f3b63f | 799 | #endif |
bebfa101 AK |
800 | #ifdef CONFIG_COMPAT |
801 | { | |
802 | .ctl_name = KERN_COMPAT_LOG, | |
803 | .procname = "compat-log", | |
804 | .data = &compat_log, | |
805 | .maxlen = sizeof (int), | |
806 | .mode = 0644, | |
807 | .proc_handler = &proc_dointvec, | |
808 | }, | |
951f22d5 | 809 | #endif |
23f78d4a IM |
810 | #ifdef CONFIG_RT_MUTEXES |
811 | { | |
812 | .ctl_name = KERN_MAX_LOCK_DEPTH, | |
813 | .procname = "max_lock_depth", | |
814 | .data = &max_lock_depth, | |
815 | .maxlen = sizeof(int), | |
816 | .mode = 0644, | |
817 | .proc_handler = &proc_dointvec, | |
818 | }, | |
819 | #endif | |
5096add8 KC |
820 | #ifdef CONFIG_PROC_FS |
821 | { | |
822 | .ctl_name = CTL_UNNUMBERED, | |
823 | .procname = "maps_protect", | |
824 | .data = &maps_protect, | |
825 | .maxlen = sizeof(int), | |
826 | .mode = 0644, | |
827 | .proc_handler = &proc_dointvec, | |
828 | }, | |
829 | #endif | |
10a0a8d4 JF |
830 | { |
831 | .ctl_name = CTL_UNNUMBERED, | |
832 | .procname = "poweroff_cmd", | |
833 | .data = &poweroff_cmd, | |
834 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
835 | .mode = 0644, | |
836 | .proc_handler = &proc_dostring, | |
837 | .strategy = &sysctl_string, | |
838 | }, | |
ed2c12f3 AM |
839 | /* |
840 | * NOTE: do not add new entries to this table unless you have read | |
841 | * Documentation/sysctl/ctl_unnumbered.txt | |
842 | */ | |
1da177e4 LT |
843 | { .ctl_name = 0 } |
844 | }; | |
845 | ||
d8217f07 | 846 | static struct ctl_table vm_table[] = { |
1da177e4 LT |
847 | { |
848 | .ctl_name = VM_OVERCOMMIT_MEMORY, | |
849 | .procname = "overcommit_memory", | |
850 | .data = &sysctl_overcommit_memory, | |
851 | .maxlen = sizeof(sysctl_overcommit_memory), | |
852 | .mode = 0644, | |
853 | .proc_handler = &proc_dointvec, | |
854 | }, | |
fadd8fbd KH |
855 | { |
856 | .ctl_name = VM_PANIC_ON_OOM, | |
857 | .procname = "panic_on_oom", | |
858 | .data = &sysctl_panic_on_oom, | |
859 | .maxlen = sizeof(sysctl_panic_on_oom), | |
860 | .mode = 0644, | |
861 | .proc_handler = &proc_dointvec, | |
862 | }, | |
fe071d7e DR |
863 | { |
864 | .ctl_name = CTL_UNNUMBERED, | |
865 | .procname = "oom_kill_allocating_task", | |
866 | .data = &sysctl_oom_kill_allocating_task, | |
867 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
868 | .mode = 0644, | |
869 | .proc_handler = &proc_dointvec, | |
870 | }, | |
1da177e4 LT |
871 | { |
872 | .ctl_name = VM_OVERCOMMIT_RATIO, | |
873 | .procname = "overcommit_ratio", | |
874 | .data = &sysctl_overcommit_ratio, | |
875 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
876 | .mode = 0644, | |
877 | .proc_handler = &proc_dointvec, | |
878 | }, | |
879 | { | |
880 | .ctl_name = VM_PAGE_CLUSTER, | |
881 | .procname = "page-cluster", | |
882 | .data = &page_cluster, | |
883 | .maxlen = sizeof(int), | |
884 | .mode = 0644, | |
885 | .proc_handler = &proc_dointvec, | |
886 | }, | |
887 | { | |
888 | .ctl_name = VM_DIRTY_BACKGROUND, | |
889 | .procname = "dirty_background_ratio", | |
890 | .data = &dirty_background_ratio, | |
891 | .maxlen = sizeof(dirty_background_ratio), | |
892 | .mode = 0644, | |
893 | .proc_handler = &proc_dointvec_minmax, | |
894 | .strategy = &sysctl_intvec, | |
895 | .extra1 = &zero, | |
896 | .extra2 = &one_hundred, | |
897 | }, | |
898 | { | |
899 | .ctl_name = VM_DIRTY_RATIO, | |
900 | .procname = "dirty_ratio", | |
901 | .data = &vm_dirty_ratio, | |
902 | .maxlen = sizeof(vm_dirty_ratio), | |
903 | .mode = 0644, | |
04fbfdc1 | 904 | .proc_handler = &dirty_ratio_handler, |
1da177e4 LT |
905 | .strategy = &sysctl_intvec, |
906 | .extra1 = &zero, | |
907 | .extra2 = &one_hundred, | |
908 | }, | |
909 | { | |
1da177e4 | 910 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
911 | .data = &dirty_writeback_interval, |
912 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 LT |
913 | .mode = 0644, |
914 | .proc_handler = &dirty_writeback_centisecs_handler, | |
915 | }, | |
916 | { | |
1da177e4 | 917 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
918 | .data = &dirty_expire_interval, |
919 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 920 | .mode = 0644, |
f6ef9438 | 921 | .proc_handler = &proc_dointvec_userhz_jiffies, |
1da177e4 LT |
922 | }, |
923 | { | |
924 | .ctl_name = VM_NR_PDFLUSH_THREADS, | |
925 | .procname = "nr_pdflush_threads", | |
926 | .data = &nr_pdflush_threads, | |
927 | .maxlen = sizeof nr_pdflush_threads, | |
928 | .mode = 0444 /* read-only*/, | |
929 | .proc_handler = &proc_dointvec, | |
930 | }, | |
931 | { | |
932 | .ctl_name = VM_SWAPPINESS, | |
933 | .procname = "swappiness", | |
934 | .data = &vm_swappiness, | |
935 | .maxlen = sizeof(vm_swappiness), | |
936 | .mode = 0644, | |
937 | .proc_handler = &proc_dointvec_minmax, | |
938 | .strategy = &sysctl_intvec, | |
939 | .extra1 = &zero, | |
940 | .extra2 = &one_hundred, | |
941 | }, | |
942 | #ifdef CONFIG_HUGETLB_PAGE | |
943 | { | |
1da177e4 LT |
944 | .procname = "nr_hugepages", |
945 | .data = &max_huge_pages, | |
946 | .maxlen = sizeof(unsigned long), | |
947 | .mode = 0644, | |
948 | .proc_handler = &hugetlb_sysctl_handler, | |
949 | .extra1 = (void *)&hugetlb_zero, | |
950 | .extra2 = (void *)&hugetlb_infinity, | |
951 | }, | |
952 | { | |
953 | .ctl_name = VM_HUGETLB_GROUP, | |
954 | .procname = "hugetlb_shm_group", | |
955 | .data = &sysctl_hugetlb_shm_group, | |
956 | .maxlen = sizeof(gid_t), | |
957 | .mode = 0644, | |
958 | .proc_handler = &proc_dointvec, | |
959 | }, | |
396faf03 MG |
960 | { |
961 | .ctl_name = CTL_UNNUMBERED, | |
962 | .procname = "hugepages_treat_as_movable", | |
963 | .data = &hugepages_treat_as_movable, | |
964 | .maxlen = sizeof(int), | |
965 | .mode = 0644, | |
966 | .proc_handler = &hugetlb_treat_movable_handler, | |
967 | }, | |
d1c3fb1f NA |
968 | { |
969 | .ctl_name = CTL_UNNUMBERED, | |
970 | .procname = "nr_overcommit_hugepages", | |
971 | .data = &nr_overcommit_huge_pages, | |
972 | .maxlen = sizeof(nr_overcommit_huge_pages), | |
973 | .mode = 0644, | |
974 | .proc_handler = &proc_doulongvec_minmax, | |
975 | }, | |
1da177e4 LT |
976 | #endif |
977 | { | |
978 | .ctl_name = VM_LOWMEM_RESERVE_RATIO, | |
979 | .procname = "lowmem_reserve_ratio", | |
980 | .data = &sysctl_lowmem_reserve_ratio, | |
981 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
982 | .mode = 0644, | |
983 | .proc_handler = &lowmem_reserve_ratio_sysctl_handler, | |
984 | .strategy = &sysctl_intvec, | |
985 | }, | |
9d0243bc AM |
986 | { |
987 | .ctl_name = VM_DROP_PAGECACHE, | |
988 | .procname = "drop_caches", | |
989 | .data = &sysctl_drop_caches, | |
990 | .maxlen = sizeof(int), | |
991 | .mode = 0644, | |
992 | .proc_handler = drop_caches_sysctl_handler, | |
993 | .strategy = &sysctl_intvec, | |
994 | }, | |
1da177e4 LT |
995 | { |
996 | .ctl_name = VM_MIN_FREE_KBYTES, | |
997 | .procname = "min_free_kbytes", | |
998 | .data = &min_free_kbytes, | |
999 | .maxlen = sizeof(min_free_kbytes), | |
1000 | .mode = 0644, | |
1001 | .proc_handler = &min_free_kbytes_sysctl_handler, | |
1002 | .strategy = &sysctl_intvec, | |
1003 | .extra1 = &zero, | |
1004 | }, | |
8ad4b1fb RS |
1005 | { |
1006 | .ctl_name = VM_PERCPU_PAGELIST_FRACTION, | |
1007 | .procname = "percpu_pagelist_fraction", | |
1008 | .data = &percpu_pagelist_fraction, | |
1009 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1010 | .mode = 0644, | |
1011 | .proc_handler = &percpu_pagelist_fraction_sysctl_handler, | |
1012 | .strategy = &sysctl_intvec, | |
1013 | .extra1 = &min_percpu_pagelist_fract, | |
1014 | }, | |
1da177e4 LT |
1015 | #ifdef CONFIG_MMU |
1016 | { | |
1017 | .ctl_name = VM_MAX_MAP_COUNT, | |
1018 | .procname = "max_map_count", | |
1019 | .data = &sysctl_max_map_count, | |
1020 | .maxlen = sizeof(sysctl_max_map_count), | |
1021 | .mode = 0644, | |
1022 | .proc_handler = &proc_dointvec | |
1023 | }, | |
1024 | #endif | |
1025 | { | |
1026 | .ctl_name = VM_LAPTOP_MODE, | |
1027 | .procname = "laptop_mode", | |
1028 | .data = &laptop_mode, | |
1029 | .maxlen = sizeof(laptop_mode), | |
1030 | .mode = 0644, | |
ed5b43f1 BS |
1031 | .proc_handler = &proc_dointvec_jiffies, |
1032 | .strategy = &sysctl_jiffies, | |
1da177e4 LT |
1033 | }, |
1034 | { | |
1035 | .ctl_name = VM_BLOCK_DUMP, | |
1036 | .procname = "block_dump", | |
1037 | .data = &block_dump, | |
1038 | .maxlen = sizeof(block_dump), | |
1039 | .mode = 0644, | |
1040 | .proc_handler = &proc_dointvec, | |
1041 | .strategy = &sysctl_intvec, | |
1042 | .extra1 = &zero, | |
1043 | }, | |
1044 | { | |
1045 | .ctl_name = VM_VFS_CACHE_PRESSURE, | |
1046 | .procname = "vfs_cache_pressure", | |
1047 | .data = &sysctl_vfs_cache_pressure, | |
1048 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1049 | .mode = 0644, | |
1050 | .proc_handler = &proc_dointvec, | |
1051 | .strategy = &sysctl_intvec, | |
1052 | .extra1 = &zero, | |
1053 | }, | |
1054 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1055 | { | |
1056 | .ctl_name = VM_LEGACY_VA_LAYOUT, | |
1057 | .procname = "legacy_va_layout", | |
1058 | .data = &sysctl_legacy_va_layout, | |
1059 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1060 | .mode = 0644, | |
1061 | .proc_handler = &proc_dointvec, | |
1062 | .strategy = &sysctl_intvec, | |
1063 | .extra1 = &zero, | |
1064 | }, | |
1065 | #endif | |
1743660b CL |
1066 | #ifdef CONFIG_NUMA |
1067 | { | |
1068 | .ctl_name = VM_ZONE_RECLAIM_MODE, | |
1069 | .procname = "zone_reclaim_mode", | |
1070 | .data = &zone_reclaim_mode, | |
1071 | .maxlen = sizeof(zone_reclaim_mode), | |
1072 | .mode = 0644, | |
1073 | .proc_handler = &proc_dointvec, | |
c84db23c CL |
1074 | .strategy = &sysctl_intvec, |
1075 | .extra1 = &zero, | |
1743660b | 1076 | }, |
9614634f CL |
1077 | { |
1078 | .ctl_name = VM_MIN_UNMAPPED, | |
1079 | .procname = "min_unmapped_ratio", | |
1080 | .data = &sysctl_min_unmapped_ratio, | |
1081 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1082 | .mode = 0644, | |
1083 | .proc_handler = &sysctl_min_unmapped_ratio_sysctl_handler, | |
1084 | .strategy = &sysctl_intvec, | |
1085 | .extra1 = &zero, | |
1086 | .extra2 = &one_hundred, | |
1087 | }, | |
0ff38490 CL |
1088 | { |
1089 | .ctl_name = VM_MIN_SLAB, | |
1090 | .procname = "min_slab_ratio", | |
1091 | .data = &sysctl_min_slab_ratio, | |
1092 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1093 | .mode = 0644, | |
1094 | .proc_handler = &sysctl_min_slab_ratio_sysctl_handler, | |
1095 | .strategy = &sysctl_intvec, | |
1096 | .extra1 = &zero, | |
1097 | .extra2 = &one_hundred, | |
1098 | }, | |
e6e5494c | 1099 | #endif |
77461ab3 CL |
1100 | #ifdef CONFIG_SMP |
1101 | { | |
1102 | .ctl_name = CTL_UNNUMBERED, | |
1103 | .procname = "stat_interval", | |
1104 | .data = &sysctl_stat_interval, | |
1105 | .maxlen = sizeof(sysctl_stat_interval), | |
1106 | .mode = 0644, | |
1107 | .proc_handler = &proc_dointvec_jiffies, | |
1108 | .strategy = &sysctl_jiffies, | |
1109 | }, | |
1110 | #endif | |
ed032189 EP |
1111 | #ifdef CONFIG_SECURITY |
1112 | { | |
1113 | .ctl_name = CTL_UNNUMBERED, | |
1114 | .procname = "mmap_min_addr", | |
1115 | .data = &mmap_min_addr, | |
1116 | .maxlen = sizeof(unsigned long), | |
1117 | .mode = 0644, | |
1118 | .proc_handler = &proc_doulongvec_minmax, | |
1119 | }, | |
8daec965 | 1120 | #endif |
f0c0b2b8 KH |
1121 | #ifdef CONFIG_NUMA |
1122 | { | |
1123 | .ctl_name = CTL_UNNUMBERED, | |
1124 | .procname = "numa_zonelist_order", | |
1125 | .data = &numa_zonelist_order, | |
1126 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1127 | .mode = 0644, | |
1128 | .proc_handler = &numa_zonelist_order_handler, | |
1129 | .strategy = &sysctl_string, | |
1130 | }, | |
1131 | #endif | |
2b8232ce | 1132 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1133 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c IM |
1134 | { |
1135 | .ctl_name = VM_VDSO_ENABLED, | |
1136 | .procname = "vdso_enabled", | |
1137 | .data = &vdso_enabled, | |
1138 | .maxlen = sizeof(vdso_enabled), | |
1139 | .mode = 0644, | |
1140 | .proc_handler = &proc_dointvec, | |
1141 | .strategy = &sysctl_intvec, | |
1142 | .extra1 = &zero, | |
1143 | }, | |
1da177e4 | 1144 | #endif |
2be7fe07 AM |
1145 | /* |
1146 | * NOTE: do not add new entries to this table unless you have read | |
1147 | * Documentation/sysctl/ctl_unnumbered.txt | |
1148 | */ | |
1da177e4 LT |
1149 | { .ctl_name = 0 } |
1150 | }; | |
1151 | ||
2abc26fc | 1152 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1153 | static struct ctl_table binfmt_misc_table[] = { |
2abc26fc EB |
1154 | { .ctl_name = 0 } |
1155 | }; | |
1156 | #endif | |
1157 | ||
d8217f07 | 1158 | static struct ctl_table fs_table[] = { |
1da177e4 LT |
1159 | { |
1160 | .ctl_name = FS_NRINODE, | |
1161 | .procname = "inode-nr", | |
1162 | .data = &inodes_stat, | |
1163 | .maxlen = 2*sizeof(int), | |
1164 | .mode = 0444, | |
1165 | .proc_handler = &proc_dointvec, | |
1166 | }, | |
1167 | { | |
1168 | .ctl_name = FS_STATINODE, | |
1169 | .procname = "inode-state", | |
1170 | .data = &inodes_stat, | |
1171 | .maxlen = 7*sizeof(int), | |
1172 | .mode = 0444, | |
1173 | .proc_handler = &proc_dointvec, | |
1174 | }, | |
1175 | { | |
1da177e4 LT |
1176 | .procname = "file-nr", |
1177 | .data = &files_stat, | |
1178 | .maxlen = 3*sizeof(int), | |
1179 | .mode = 0444, | |
529bf6be | 1180 | .proc_handler = &proc_nr_files, |
1da177e4 LT |
1181 | }, |
1182 | { | |
1183 | .ctl_name = FS_MAXFILE, | |
1184 | .procname = "file-max", | |
1185 | .data = &files_stat.max_files, | |
1186 | .maxlen = sizeof(int), | |
1187 | .mode = 0644, | |
1188 | .proc_handler = &proc_dointvec, | |
1189 | }, | |
1190 | { | |
1191 | .ctl_name = FS_DENTRY, | |
1192 | .procname = "dentry-state", | |
1193 | .data = &dentry_stat, | |
1194 | .maxlen = 6*sizeof(int), | |
1195 | .mode = 0444, | |
1196 | .proc_handler = &proc_dointvec, | |
1197 | }, | |
1198 | { | |
1199 | .ctl_name = FS_OVERFLOWUID, | |
1200 | .procname = "overflowuid", | |
1201 | .data = &fs_overflowuid, | |
1202 | .maxlen = sizeof(int), | |
1203 | .mode = 0644, | |
1204 | .proc_handler = &proc_dointvec_minmax, | |
1205 | .strategy = &sysctl_intvec, | |
1206 | .extra1 = &minolduid, | |
1207 | .extra2 = &maxolduid, | |
1208 | }, | |
1209 | { | |
1210 | .ctl_name = FS_OVERFLOWGID, | |
1211 | .procname = "overflowgid", | |
1212 | .data = &fs_overflowgid, | |
1213 | .maxlen = sizeof(int), | |
1214 | .mode = 0644, | |
1215 | .proc_handler = &proc_dointvec_minmax, | |
1216 | .strategy = &sysctl_intvec, | |
1217 | .extra1 = &minolduid, | |
1218 | .extra2 = &maxolduid, | |
1219 | }, | |
1220 | { | |
1221 | .ctl_name = FS_LEASES, | |
1222 | .procname = "leases-enable", | |
1223 | .data = &leases_enable, | |
1224 | .maxlen = sizeof(int), | |
1225 | .mode = 0644, | |
1226 | .proc_handler = &proc_dointvec, | |
1227 | }, | |
1228 | #ifdef CONFIG_DNOTIFY | |
1229 | { | |
1230 | .ctl_name = FS_DIR_NOTIFY, | |
1231 | .procname = "dir-notify-enable", | |
1232 | .data = &dir_notify_enable, | |
1233 | .maxlen = sizeof(int), | |
1234 | .mode = 0644, | |
1235 | .proc_handler = &proc_dointvec, | |
1236 | }, | |
1237 | #endif | |
1238 | #ifdef CONFIG_MMU | |
1239 | { | |
1240 | .ctl_name = FS_LEASE_TIME, | |
1241 | .procname = "lease-break-time", | |
1242 | .data = &lease_break_time, | |
1243 | .maxlen = sizeof(int), | |
1244 | .mode = 0644, | |
76fdbb25 KH |
1245 | .proc_handler = &proc_dointvec_minmax, |
1246 | .strategy = &sysctl_intvec, | |
1247 | .extra1 = &zero, | |
1248 | .extra2 = &two, | |
1da177e4 LT |
1249 | }, |
1250 | { | |
1da177e4 LT |
1251 | .procname = "aio-nr", |
1252 | .data = &aio_nr, | |
1253 | .maxlen = sizeof(aio_nr), | |
1254 | .mode = 0444, | |
d55b5fda | 1255 | .proc_handler = &proc_doulongvec_minmax, |
1da177e4 LT |
1256 | }, |
1257 | { | |
1da177e4 LT |
1258 | .procname = "aio-max-nr", |
1259 | .data = &aio_max_nr, | |
1260 | .maxlen = sizeof(aio_max_nr), | |
1261 | .mode = 0644, | |
d55b5fda | 1262 | .proc_handler = &proc_doulongvec_minmax, |
1da177e4 | 1263 | }, |
2d9048e2 | 1264 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 RL |
1265 | { |
1266 | .ctl_name = FS_INOTIFY, | |
1267 | .procname = "inotify", | |
1268 | .mode = 0555, | |
1269 | .child = inotify_table, | |
1270 | }, | |
1271 | #endif | |
1da177e4 | 1272 | #endif |
d6e71144 AC |
1273 | { |
1274 | .ctl_name = KERN_SETUID_DUMPABLE, | |
1275 | .procname = "suid_dumpable", | |
1276 | .data = &suid_dumpable, | |
1277 | .maxlen = sizeof(int), | |
1278 | .mode = 0644, | |
1279 | .proc_handler = &proc_dointvec, | |
1280 | }, | |
2abc26fc EB |
1281 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1282 | { | |
1283 | .ctl_name = CTL_UNNUMBERED, | |
1284 | .procname = "binfmt_misc", | |
1285 | .mode = 0555, | |
1286 | .child = binfmt_misc_table, | |
1287 | }, | |
1288 | #endif | |
2be7fe07 AM |
1289 | /* |
1290 | * NOTE: do not add new entries to this table unless you have read | |
1291 | * Documentation/sysctl/ctl_unnumbered.txt | |
2be7fe07 | 1292 | */ |
1da177e4 LT |
1293 | { .ctl_name = 0 } |
1294 | }; | |
1295 | ||
d8217f07 | 1296 | static struct ctl_table debug_table[] = { |
d0c3d534 | 1297 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) |
abd4f750 MAS |
1298 | { |
1299 | .ctl_name = CTL_UNNUMBERED, | |
1300 | .procname = "exception-trace", | |
1301 | .data = &show_unhandled_signals, | |
1302 | .maxlen = sizeof(int), | |
1303 | .mode = 0644, | |
1304 | .proc_handler = proc_dointvec | |
1305 | }, | |
1306 | #endif | |
1da177e4 LT |
1307 | { .ctl_name = 0 } |
1308 | }; | |
1309 | ||
d8217f07 | 1310 | static struct ctl_table dev_table[] = { |
1da177e4 | 1311 | { .ctl_name = 0 } |
0eeca283 | 1312 | }; |
1da177e4 | 1313 | |
330d57fb AV |
1314 | static DEFINE_SPINLOCK(sysctl_lock); |
1315 | ||
1316 | /* called under sysctl_lock */ | |
1317 | static int use_table(struct ctl_table_header *p) | |
1318 | { | |
1319 | if (unlikely(p->unregistering)) | |
1320 | return 0; | |
1321 | p->used++; | |
1322 | return 1; | |
1323 | } | |
1324 | ||
1325 | /* called under sysctl_lock */ | |
1326 | static void unuse_table(struct ctl_table_header *p) | |
1327 | { | |
1328 | if (!--p->used) | |
1329 | if (unlikely(p->unregistering)) | |
1330 | complete(p->unregistering); | |
1331 | } | |
1332 | ||
1333 | /* called under sysctl_lock, will reacquire if has to wait */ | |
1334 | static void start_unregistering(struct ctl_table_header *p) | |
1335 | { | |
1336 | /* | |
1337 | * if p->used is 0, nobody will ever touch that entry again; | |
1338 | * we'll eliminate all paths to it before dropping sysctl_lock | |
1339 | */ | |
1340 | if (unlikely(p->used)) { | |
1341 | struct completion wait; | |
1342 | init_completion(&wait); | |
1343 | p->unregistering = &wait; | |
1344 | spin_unlock(&sysctl_lock); | |
1345 | wait_for_completion(&wait); | |
1346 | spin_lock(&sysctl_lock); | |
1347 | } | |
1348 | /* | |
1349 | * do not remove from the list until nobody holds it; walking the | |
1350 | * list in do_sysctl() relies on that. | |
1351 | */ | |
1352 | list_del_init(&p->ctl_entry); | |
1353 | } | |
1354 | ||
805b5d5e EB |
1355 | void sysctl_head_finish(struct ctl_table_header *head) |
1356 | { | |
1357 | if (!head) | |
1358 | return; | |
1359 | spin_lock(&sysctl_lock); | |
1360 | unuse_table(head); | |
1361 | spin_unlock(&sysctl_lock); | |
1362 | } | |
1363 | ||
1364 | struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev) | |
1365 | { | |
1366 | struct ctl_table_header *head; | |
1367 | struct list_head *tmp; | |
1368 | spin_lock(&sysctl_lock); | |
1369 | if (prev) { | |
1370 | tmp = &prev->ctl_entry; | |
1371 | unuse_table(prev); | |
1372 | goto next; | |
1373 | } | |
1374 | tmp = &root_table_header.ctl_entry; | |
1375 | for (;;) { | |
1376 | head = list_entry(tmp, struct ctl_table_header, ctl_entry); | |
1377 | ||
1378 | if (!use_table(head)) | |
1379 | goto next; | |
1380 | spin_unlock(&sysctl_lock); | |
1381 | return head; | |
1382 | next: | |
1383 | tmp = tmp->next; | |
1384 | if (tmp == &root_table_header.ctl_entry) | |
1385 | break; | |
1386 | } | |
1387 | spin_unlock(&sysctl_lock); | |
1388 | return NULL; | |
1389 | } | |
1390 | ||
b89a8171 | 1391 | #ifdef CONFIG_SYSCTL_SYSCALL |
1da177e4 LT |
1392 | int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *oldlenp, |
1393 | void __user *newval, size_t newlen) | |
1394 | { | |
805b5d5e | 1395 | struct ctl_table_header *head; |
330d57fb | 1396 | int error = -ENOTDIR; |
1da177e4 LT |
1397 | |
1398 | if (nlen <= 0 || nlen >= CTL_MAXNAME) | |
1399 | return -ENOTDIR; | |
1400 | if (oldval) { | |
1401 | int old_len; | |
1402 | if (!oldlenp || get_user(old_len, oldlenp)) | |
1403 | return -EFAULT; | |
1404 | } | |
330d57fb | 1405 | |
805b5d5e EB |
1406 | for (head = sysctl_head_next(NULL); head; |
1407 | head = sysctl_head_next(head)) { | |
330d57fb | 1408 | error = parse_table(name, nlen, oldval, oldlenp, |
1f29bcd7 | 1409 | newval, newlen, head->ctl_table); |
805b5d5e EB |
1410 | if (error != -ENOTDIR) { |
1411 | sysctl_head_finish(head); | |
330d57fb | 1412 | break; |
805b5d5e EB |
1413 | } |
1414 | } | |
330d57fb | 1415 | return error; |
1da177e4 LT |
1416 | } |
1417 | ||
1418 | asmlinkage long sys_sysctl(struct __sysctl_args __user *args) | |
1419 | { | |
1420 | struct __sysctl_args tmp; | |
1421 | int error; | |
1422 | ||
1423 | if (copy_from_user(&tmp, args, sizeof(tmp))) | |
1424 | return -EFAULT; | |
1425 | ||
7058cb02 EB |
1426 | error = deprecated_sysctl_warning(&tmp); |
1427 | if (error) | |
1428 | goto out; | |
1429 | ||
1da177e4 LT |
1430 | lock_kernel(); |
1431 | error = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, tmp.oldlenp, | |
1432 | tmp.newval, tmp.newlen); | |
1433 | unlock_kernel(); | |
7058cb02 | 1434 | out: |
1da177e4 LT |
1435 | return error; |
1436 | } | |
b89a8171 | 1437 | #endif /* CONFIG_SYSCTL_SYSCALL */ |
1da177e4 LT |
1438 | |
1439 | /* | |
1ff007eb | 1440 | * sysctl_perm does NOT grant the superuser all rights automatically, because |
1da177e4 LT |
1441 | * some sysctl variables are readonly even to root. |
1442 | */ | |
1443 | ||
1444 | static int test_perm(int mode, int op) | |
1445 | { | |
1446 | if (!current->euid) | |
1447 | mode >>= 6; | |
1448 | else if (in_egroup_p(0)) | |
1449 | mode >>= 3; | |
1450 | if ((mode & op & 0007) == op) | |
1451 | return 0; | |
1452 | return -EACCES; | |
1453 | } | |
1454 | ||
d8217f07 | 1455 | int sysctl_perm(struct ctl_table *table, int op) |
1da177e4 LT |
1456 | { |
1457 | int error; | |
1458 | error = security_sysctl(table, op); | |
1459 | if (error) | |
1460 | return error; | |
1461 | return test_perm(table->mode, op); | |
1462 | } | |
1463 | ||
b89a8171 | 1464 | #ifdef CONFIG_SYSCTL_SYSCALL |
1da177e4 LT |
1465 | static int parse_table(int __user *name, int nlen, |
1466 | void __user *oldval, size_t __user *oldlenp, | |
1467 | void __user *newval, size_t newlen, | |
d8217f07 | 1468 | struct ctl_table *table) |
1da177e4 LT |
1469 | { |
1470 | int n; | |
1471 | repeat: | |
1472 | if (!nlen) | |
1473 | return -ENOTDIR; | |
1474 | if (get_user(n, name)) | |
1475 | return -EFAULT; | |
d99f160a EB |
1476 | for ( ; table->ctl_name || table->procname; table++) { |
1477 | if (!table->ctl_name) | |
1478 | continue; | |
6703ddfc | 1479 | if (n == table->ctl_name) { |
1da177e4 LT |
1480 | int error; |
1481 | if (table->child) { | |
1ff007eb | 1482 | if (sysctl_perm(table, 001)) |
1da177e4 | 1483 | return -EPERM; |
1da177e4 LT |
1484 | name++; |
1485 | nlen--; | |
1486 | table = table->child; | |
1487 | goto repeat; | |
1488 | } | |
1489 | error = do_sysctl_strategy(table, name, nlen, | |
1490 | oldval, oldlenp, | |
1f29bcd7 | 1491 | newval, newlen); |
1da177e4 LT |
1492 | return error; |
1493 | } | |
1494 | } | |
1495 | return -ENOTDIR; | |
1496 | } | |
1497 | ||
1498 | /* Perform the actual read/write of a sysctl table entry. */ | |
d8217f07 | 1499 | int do_sysctl_strategy (struct ctl_table *table, |
1da177e4 LT |
1500 | int __user *name, int nlen, |
1501 | void __user *oldval, size_t __user *oldlenp, | |
1f29bcd7 | 1502 | void __user *newval, size_t newlen) |
1da177e4 LT |
1503 | { |
1504 | int op = 0, rc; | |
1da177e4 LT |
1505 | |
1506 | if (oldval) | |
1507 | op |= 004; | |
1508 | if (newval) | |
1509 | op |= 002; | |
1ff007eb | 1510 | if (sysctl_perm(table, op)) |
1da177e4 LT |
1511 | return -EPERM; |
1512 | ||
1513 | if (table->strategy) { | |
1514 | rc = table->strategy(table, name, nlen, oldval, oldlenp, | |
1f29bcd7 | 1515 | newval, newlen); |
1da177e4 LT |
1516 | if (rc < 0) |
1517 | return rc; | |
1518 | if (rc > 0) | |
1519 | return 0; | |
1520 | } | |
1521 | ||
1522 | /* If there is no strategy routine, or if the strategy returns | |
1523 | * zero, proceed with automatic r/w */ | |
1524 | if (table->data && table->maxlen) { | |
49a0c458 EB |
1525 | rc = sysctl_data(table, name, nlen, oldval, oldlenp, |
1526 | newval, newlen); | |
1527 | if (rc < 0) | |
1528 | return rc; | |
1da177e4 LT |
1529 | } |
1530 | return 0; | |
1531 | } | |
b89a8171 | 1532 | #endif /* CONFIG_SYSCTL_SYSCALL */ |
1da177e4 | 1533 | |
d912b0cc EB |
1534 | static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table) |
1535 | { | |
1536 | for (; table->ctl_name || table->procname; table++) { | |
1537 | table->parent = parent; | |
1538 | if (table->child) | |
1539 | sysctl_set_parent(table, table->child); | |
1540 | } | |
1541 | } | |
1542 | ||
1543 | static __init int sysctl_init(void) | |
1544 | { | |
fc6cd25b | 1545 | int err; |
d912b0cc | 1546 | sysctl_set_parent(NULL, root_table); |
fc6cd25b | 1547 | err = sysctl_check_table(root_table); |
d912b0cc EB |
1548 | return 0; |
1549 | } | |
1550 | ||
1551 | core_initcall(sysctl_init); | |
1552 | ||
1da177e4 LT |
1553 | /** |
1554 | * register_sysctl_table - register a sysctl hierarchy | |
1555 | * @table: the top-level table structure | |
1da177e4 LT |
1556 | * |
1557 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
1558 | * array. An entry with a ctl_name of 0 terminates the table. | |
1559 | * | |
d8217f07 | 1560 | * The members of the &struct ctl_table structure are used as follows: |
1da177e4 LT |
1561 | * |
1562 | * ctl_name - This is the numeric sysctl value used by sysctl(2). The number | |
1563 | * must be unique within that level of sysctl | |
1564 | * | |
1565 | * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not | |
1566 | * enter a sysctl file | |
1567 | * | |
1568 | * data - a pointer to data for use by proc_handler | |
1569 | * | |
1570 | * maxlen - the maximum size in bytes of the data | |
1571 | * | |
1572 | * mode - the file permissions for the /proc/sys file, and for sysctl(2) | |
1573 | * | |
1574 | * child - a pointer to the child sysctl table if this entry is a directory, or | |
1575 | * %NULL. | |
1576 | * | |
1577 | * proc_handler - the text handler routine (described below) | |
1578 | * | |
1579 | * strategy - the strategy routine (described below) | |
1580 | * | |
1581 | * de - for internal use by the sysctl routines | |
1582 | * | |
1583 | * extra1, extra2 - extra pointers usable by the proc handler routines | |
1584 | * | |
1585 | * Leaf nodes in the sysctl tree will be represented by a single file | |
1586 | * under /proc; non-leaf nodes will be represented by directories. | |
1587 | * | |
1588 | * sysctl(2) can automatically manage read and write requests through | |
1589 | * the sysctl table. The data and maxlen fields of the ctl_table | |
1590 | * struct enable minimal validation of the values being written to be | |
1591 | * performed, and the mode field allows minimal authentication. | |
1592 | * | |
1593 | * More sophisticated management can be enabled by the provision of a | |
1594 | * strategy routine with the table entry. This will be called before | |
1595 | * any automatic read or write of the data is performed. | |
1596 | * | |
1597 | * The strategy routine may return | |
1598 | * | |
1599 | * < 0 - Error occurred (error is passed to user process) | |
1600 | * | |
1601 | * 0 - OK - proceed with automatic read or write. | |
1602 | * | |
1603 | * > 0 - OK - read or write has been done by the strategy routine, so | |
1604 | * return immediately. | |
1605 | * | |
1606 | * There must be a proc_handler routine for any terminal nodes | |
1607 | * mirrored under /proc/sys (non-terminals are handled by a built-in | |
1608 | * directory handler). Several default handlers are available to | |
1609 | * cover common cases - | |
1610 | * | |
1611 | * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(), | |
1612 | * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(), | |
1613 | * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax() | |
1614 | * | |
1615 | * It is the handler's job to read the input buffer from user memory | |
1616 | * and process it. The handler should return 0 on success. | |
1617 | * | |
1618 | * This routine returns %NULL on a failure to register, and a pointer | |
1619 | * to the table header on success. | |
1620 | */ | |
d8217f07 | 1621 | struct ctl_table_header *register_sysctl_table(struct ctl_table * table) |
1da177e4 LT |
1622 | { |
1623 | struct ctl_table_header *tmp; | |
1624 | tmp = kmalloc(sizeof(struct ctl_table_header), GFP_KERNEL); | |
1625 | if (!tmp) | |
1626 | return NULL; | |
1627 | tmp->ctl_table = table; | |
1628 | INIT_LIST_HEAD(&tmp->ctl_entry); | |
330d57fb AV |
1629 | tmp->used = 0; |
1630 | tmp->unregistering = NULL; | |
d912b0cc | 1631 | sysctl_set_parent(NULL, table); |
fc6cd25b EB |
1632 | if (sysctl_check_table(tmp->ctl_table)) { |
1633 | kfree(tmp); | |
1634 | return NULL; | |
1635 | } | |
330d57fb | 1636 | spin_lock(&sysctl_lock); |
0b4d4147 | 1637 | list_add_tail(&tmp->ctl_entry, &root_table_header.ctl_entry); |
330d57fb | 1638 | spin_unlock(&sysctl_lock); |
1da177e4 LT |
1639 | return tmp; |
1640 | } | |
1641 | ||
1642 | /** | |
1643 | * unregister_sysctl_table - unregister a sysctl table hierarchy | |
1644 | * @header: the header returned from register_sysctl_table | |
1645 | * | |
1646 | * Unregisters the sysctl table and all children. proc entries may not | |
1647 | * actually be removed until they are no longer used by anyone. | |
1648 | */ | |
1649 | void unregister_sysctl_table(struct ctl_table_header * header) | |
1650 | { | |
330d57fb | 1651 | might_sleep(); |
f1dad166 PE |
1652 | |
1653 | if (header == NULL) | |
1654 | return; | |
1655 | ||
330d57fb AV |
1656 | spin_lock(&sysctl_lock); |
1657 | start_unregistering(header); | |
330d57fb | 1658 | spin_unlock(&sysctl_lock); |
1da177e4 LT |
1659 | kfree(header); |
1660 | } | |
1661 | ||
b89a8171 | 1662 | #else /* !CONFIG_SYSCTL */ |
d8217f07 | 1663 | struct ctl_table_header *register_sysctl_table(struct ctl_table * table) |
b89a8171 EB |
1664 | { |
1665 | return NULL; | |
1666 | } | |
1667 | ||
1668 | void unregister_sysctl_table(struct ctl_table_header * table) | |
1669 | { | |
1670 | } | |
1671 | ||
1672 | #endif /* CONFIG_SYSCTL */ | |
1673 | ||
1da177e4 LT |
1674 | /* |
1675 | * /proc/sys support | |
1676 | */ | |
1677 | ||
b89a8171 | 1678 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1679 | |
b1ba4ddd AB |
1680 | static int _proc_do_string(void* data, int maxlen, int write, |
1681 | struct file *filp, void __user *buffer, | |
1682 | size_t *lenp, loff_t *ppos) | |
1da177e4 LT |
1683 | { |
1684 | size_t len; | |
1685 | char __user *p; | |
1686 | char c; | |
8d060877 ON |
1687 | |
1688 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1689 | *lenp = 0; |
1690 | return 0; | |
1691 | } | |
8d060877 | 1692 | |
1da177e4 LT |
1693 | if (write) { |
1694 | len = 0; | |
1695 | p = buffer; | |
1696 | while (len < *lenp) { | |
1697 | if (get_user(c, p++)) | |
1698 | return -EFAULT; | |
1699 | if (c == 0 || c == '\n') | |
1700 | break; | |
1701 | len++; | |
1702 | } | |
f5dd3d6f SV |
1703 | if (len >= maxlen) |
1704 | len = maxlen-1; | |
1705 | if(copy_from_user(data, buffer, len)) | |
1da177e4 | 1706 | return -EFAULT; |
f5dd3d6f | 1707 | ((char *) data)[len] = 0; |
1da177e4 LT |
1708 | *ppos += *lenp; |
1709 | } else { | |
f5dd3d6f SV |
1710 | len = strlen(data); |
1711 | if (len > maxlen) | |
1712 | len = maxlen; | |
8d060877 ON |
1713 | |
1714 | if (*ppos > len) { | |
1715 | *lenp = 0; | |
1716 | return 0; | |
1717 | } | |
1718 | ||
1719 | data += *ppos; | |
1720 | len -= *ppos; | |
1721 | ||
1da177e4 LT |
1722 | if (len > *lenp) |
1723 | len = *lenp; | |
1724 | if (len) | |
f5dd3d6f | 1725 | if(copy_to_user(buffer, data, len)) |
1da177e4 LT |
1726 | return -EFAULT; |
1727 | if (len < *lenp) { | |
1728 | if(put_user('\n', ((char __user *) buffer) + len)) | |
1729 | return -EFAULT; | |
1730 | len++; | |
1731 | } | |
1732 | *lenp = len; | |
1733 | *ppos += len; | |
1734 | } | |
1735 | return 0; | |
1736 | } | |
1737 | ||
f5dd3d6f SV |
1738 | /** |
1739 | * proc_dostring - read a string sysctl | |
1740 | * @table: the sysctl table | |
1741 | * @write: %TRUE if this is a write to the sysctl file | |
1742 | * @filp: the file structure | |
1743 | * @buffer: the user buffer | |
1744 | * @lenp: the size of the user buffer | |
1745 | * @ppos: file position | |
1746 | * | |
1747 | * Reads/writes a string from/to the user buffer. If the kernel | |
1748 | * buffer provided is not large enough to hold the string, the | |
1749 | * string is truncated. The copied string is %NULL-terminated. | |
1750 | * If the string is being read by the user process, it is copied | |
1751 | * and a newline '\n' is added. It is truncated if the buffer is | |
1752 | * not large enough. | |
1753 | * | |
1754 | * Returns 0 on success. | |
1755 | */ | |
d8217f07 | 1756 | int proc_dostring(struct ctl_table *table, int write, struct file *filp, |
f5dd3d6f SV |
1757 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1758 | { | |
1759 | return _proc_do_string(table->data, table->maxlen, write, filp, | |
1760 | buffer, lenp, ppos); | |
1761 | } | |
1762 | ||
1da177e4 LT |
1763 | |
1764 | static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp, | |
1765 | int *valp, | |
1766 | int write, void *data) | |
1767 | { | |
1768 | if (write) { | |
1769 | *valp = *negp ? -*lvalp : *lvalp; | |
1770 | } else { | |
1771 | int val = *valp; | |
1772 | if (val < 0) { | |
1773 | *negp = -1; | |
1774 | *lvalp = (unsigned long)-val; | |
1775 | } else { | |
1776 | *negp = 0; | |
1777 | *lvalp = (unsigned long)val; | |
1778 | } | |
1779 | } | |
1780 | return 0; | |
1781 | } | |
1782 | ||
d8217f07 | 1783 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
fcfbd547 KK |
1784 | int write, struct file *filp, void __user *buffer, |
1785 | size_t *lenp, loff_t *ppos, | |
1da177e4 LT |
1786 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, |
1787 | int write, void *data), | |
1788 | void *data) | |
1789 | { | |
1790 | #define TMPBUFLEN 21 | |
1791 | int *i, vleft, first=1, neg, val; | |
1792 | unsigned long lval; | |
1793 | size_t left, len; | |
1794 | ||
1795 | char buf[TMPBUFLEN], *p; | |
1796 | char __user *s = buffer; | |
1797 | ||
fcfbd547 | 1798 | if (!tbl_data || !table->maxlen || !*lenp || |
1da177e4 LT |
1799 | (*ppos && !write)) { |
1800 | *lenp = 0; | |
1801 | return 0; | |
1802 | } | |
1803 | ||
fcfbd547 | 1804 | i = (int *) tbl_data; |
1da177e4 LT |
1805 | vleft = table->maxlen / sizeof(*i); |
1806 | left = *lenp; | |
1807 | ||
1808 | if (!conv) | |
1809 | conv = do_proc_dointvec_conv; | |
1810 | ||
1811 | for (; left && vleft--; i++, first=0) { | |
1812 | if (write) { | |
1813 | while (left) { | |
1814 | char c; | |
1815 | if (get_user(c, s)) | |
1816 | return -EFAULT; | |
1817 | if (!isspace(c)) | |
1818 | break; | |
1819 | left--; | |
1820 | s++; | |
1821 | } | |
1822 | if (!left) | |
1823 | break; | |
1824 | neg = 0; | |
1825 | len = left; | |
1826 | if (len > sizeof(buf) - 1) | |
1827 | len = sizeof(buf) - 1; | |
1828 | if (copy_from_user(buf, s, len)) | |
1829 | return -EFAULT; | |
1830 | buf[len] = 0; | |
1831 | p = buf; | |
1832 | if (*p == '-' && left > 1) { | |
1833 | neg = 1; | |
bd9b0bac | 1834 | p++; |
1da177e4 LT |
1835 | } |
1836 | if (*p < '0' || *p > '9') | |
1837 | break; | |
1838 | ||
1839 | lval = simple_strtoul(p, &p, 0); | |
1840 | ||
1841 | len = p-buf; | |
1842 | if ((len < left) && *p && !isspace(*p)) | |
1843 | break; | |
1844 | if (neg) | |
1845 | val = -val; | |
1846 | s += len; | |
1847 | left -= len; | |
1848 | ||
1849 | if (conv(&neg, &lval, i, 1, data)) | |
1850 | break; | |
1851 | } else { | |
1852 | p = buf; | |
1853 | if (!first) | |
1854 | *p++ = '\t'; | |
1855 | ||
1856 | if (conv(&neg, &lval, i, 0, data)) | |
1857 | break; | |
1858 | ||
1859 | sprintf(p, "%s%lu", neg ? "-" : "", lval); | |
1860 | len = strlen(buf); | |
1861 | if (len > left) | |
1862 | len = left; | |
1863 | if(copy_to_user(s, buf, len)) | |
1864 | return -EFAULT; | |
1865 | left -= len; | |
1866 | s += len; | |
1867 | } | |
1868 | } | |
1869 | ||
1870 | if (!write && !first && left) { | |
1871 | if(put_user('\n', s)) | |
1872 | return -EFAULT; | |
1873 | left--, s++; | |
1874 | } | |
1875 | if (write) { | |
1876 | while (left) { | |
1877 | char c; | |
1878 | if (get_user(c, s++)) | |
1879 | return -EFAULT; | |
1880 | if (!isspace(c)) | |
1881 | break; | |
1882 | left--; | |
1883 | } | |
1884 | } | |
1885 | if (write && first) | |
1886 | return -EINVAL; | |
1887 | *lenp -= left; | |
1888 | *ppos += *lenp; | |
1889 | return 0; | |
1890 | #undef TMPBUFLEN | |
1891 | } | |
1892 | ||
d8217f07 | 1893 | static int do_proc_dointvec(struct ctl_table *table, int write, struct file *filp, |
fcfbd547 KK |
1894 | void __user *buffer, size_t *lenp, loff_t *ppos, |
1895 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, | |
1896 | int write, void *data), | |
1897 | void *data) | |
1898 | { | |
1899 | return __do_proc_dointvec(table->data, table, write, filp, | |
1900 | buffer, lenp, ppos, conv, data); | |
1901 | } | |
1902 | ||
1da177e4 LT |
1903 | /** |
1904 | * proc_dointvec - read a vector of integers | |
1905 | * @table: the sysctl table | |
1906 | * @write: %TRUE if this is a write to the sysctl file | |
1907 | * @filp: the file structure | |
1908 | * @buffer: the user buffer | |
1909 | * @lenp: the size of the user buffer | |
1910 | * @ppos: file position | |
1911 | * | |
1912 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
1913 | * values from/to the user buffer, treated as an ASCII string. | |
1914 | * | |
1915 | * Returns 0 on success. | |
1916 | */ | |
d8217f07 | 1917 | int proc_dointvec(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
1918 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1919 | { | |
1920 | return do_proc_dointvec(table,write,filp,buffer,lenp,ppos, | |
1921 | NULL,NULL); | |
1922 | } | |
1923 | ||
1924 | #define OP_SET 0 | |
1925 | #define OP_AND 1 | |
34f5a398 | 1926 | #define OP_OR 2 |
1da177e4 LT |
1927 | |
1928 | static int do_proc_dointvec_bset_conv(int *negp, unsigned long *lvalp, | |
1929 | int *valp, | |
1930 | int write, void *data) | |
1931 | { | |
1932 | int op = *(int *)data; | |
1933 | if (write) { | |
1934 | int val = *negp ? -*lvalp : *lvalp; | |
1935 | switch(op) { | |
1936 | case OP_SET: *valp = val; break; | |
1937 | case OP_AND: *valp &= val; break; | |
34f5a398 | 1938 | case OP_OR: *valp |= val; break; |
1da177e4 LT |
1939 | } |
1940 | } else { | |
1941 | int val = *valp; | |
1942 | if (val < 0) { | |
1943 | *negp = -1; | |
1944 | *lvalp = (unsigned long)-val; | |
1945 | } else { | |
1946 | *negp = 0; | |
1947 | *lvalp = (unsigned long)val; | |
1948 | } | |
1949 | } | |
1950 | return 0; | |
1951 | } | |
1952 | ||
72c2d582 | 1953 | #ifdef CONFIG_SECURITY_CAPABILITIES |
1da177e4 LT |
1954 | /* |
1955 | * init may raise the set. | |
1956 | */ | |
72c2d582 | 1957 | |
d8217f07 | 1958 | int proc_dointvec_bset(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
1959 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1960 | { | |
1961 | int op; | |
1962 | ||
6ff1b442 | 1963 | if (write && !capable(CAP_SYS_MODULE)) { |
1da177e4 LT |
1964 | return -EPERM; |
1965 | } | |
1966 | ||
b460cbc5 | 1967 | op = is_global_init(current) ? OP_SET : OP_AND; |
1da177e4 LT |
1968 | return do_proc_dointvec(table,write,filp,buffer,lenp,ppos, |
1969 | do_proc_dointvec_bset_conv,&op); | |
1970 | } | |
72c2d582 | 1971 | #endif /* def CONFIG_SECURITY_CAPABILITIES */ |
1da177e4 | 1972 | |
34f5a398 TT |
1973 | /* |
1974 | * Taint values can only be increased | |
1975 | */ | |
d8217f07 | 1976 | static int proc_dointvec_taint(struct ctl_table *table, int write, struct file *filp, |
34f5a398 TT |
1977 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1978 | { | |
1979 | int op; | |
1980 | ||
91fcd412 | 1981 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
1982 | return -EPERM; |
1983 | ||
1984 | op = OP_OR; | |
1985 | return do_proc_dointvec(table,write,filp,buffer,lenp,ppos, | |
1986 | do_proc_dointvec_bset_conv,&op); | |
1987 | } | |
1988 | ||
1da177e4 LT |
1989 | struct do_proc_dointvec_minmax_conv_param { |
1990 | int *min; | |
1991 | int *max; | |
1992 | }; | |
1993 | ||
1994 | static int do_proc_dointvec_minmax_conv(int *negp, unsigned long *lvalp, | |
1995 | int *valp, | |
1996 | int write, void *data) | |
1997 | { | |
1998 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
1999 | if (write) { | |
2000 | int val = *negp ? -*lvalp : *lvalp; | |
2001 | if ((param->min && *param->min > val) || | |
2002 | (param->max && *param->max < val)) | |
2003 | return -EINVAL; | |
2004 | *valp = val; | |
2005 | } else { | |
2006 | int val = *valp; | |
2007 | if (val < 0) { | |
2008 | *negp = -1; | |
2009 | *lvalp = (unsigned long)-val; | |
2010 | } else { | |
2011 | *negp = 0; | |
2012 | *lvalp = (unsigned long)val; | |
2013 | } | |
2014 | } | |
2015 | return 0; | |
2016 | } | |
2017 | ||
2018 | /** | |
2019 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2020 | * @table: the sysctl table | |
2021 | * @write: %TRUE if this is a write to the sysctl file | |
2022 | * @filp: the file structure | |
2023 | * @buffer: the user buffer | |
2024 | * @lenp: the size of the user buffer | |
2025 | * @ppos: file position | |
2026 | * | |
2027 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2028 | * values from/to the user buffer, treated as an ASCII string. | |
2029 | * | |
2030 | * This routine will ensure the values are within the range specified by | |
2031 | * table->extra1 (min) and table->extra2 (max). | |
2032 | * | |
2033 | * Returns 0 on success. | |
2034 | */ | |
d8217f07 | 2035 | int proc_dointvec_minmax(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2036 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2037 | { | |
2038 | struct do_proc_dointvec_minmax_conv_param param = { | |
2039 | .min = (int *) table->extra1, | |
2040 | .max = (int *) table->extra2, | |
2041 | }; | |
2042 | return do_proc_dointvec(table, write, filp, buffer, lenp, ppos, | |
2043 | do_proc_dointvec_minmax_conv, ¶m); | |
2044 | } | |
2045 | ||
d8217f07 | 2046 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2047 | struct file *filp, |
2048 | void __user *buffer, | |
2049 | size_t *lenp, loff_t *ppos, | |
2050 | unsigned long convmul, | |
2051 | unsigned long convdiv) | |
2052 | { | |
2053 | #define TMPBUFLEN 21 | |
2054 | unsigned long *i, *min, *max, val; | |
2055 | int vleft, first=1, neg; | |
2056 | size_t len, left; | |
2057 | char buf[TMPBUFLEN], *p; | |
2058 | char __user *s = buffer; | |
2059 | ||
fcfbd547 | 2060 | if (!data || !table->maxlen || !*lenp || |
1da177e4 LT |
2061 | (*ppos && !write)) { |
2062 | *lenp = 0; | |
2063 | return 0; | |
2064 | } | |
2065 | ||
fcfbd547 | 2066 | i = (unsigned long *) data; |
1da177e4 LT |
2067 | min = (unsigned long *) table->extra1; |
2068 | max = (unsigned long *) table->extra2; | |
2069 | vleft = table->maxlen / sizeof(unsigned long); | |
2070 | left = *lenp; | |
2071 | ||
2072 | for (; left && vleft--; i++, min++, max++, first=0) { | |
2073 | if (write) { | |
2074 | while (left) { | |
2075 | char c; | |
2076 | if (get_user(c, s)) | |
2077 | return -EFAULT; | |
2078 | if (!isspace(c)) | |
2079 | break; | |
2080 | left--; | |
2081 | s++; | |
2082 | } | |
2083 | if (!left) | |
2084 | break; | |
2085 | neg = 0; | |
2086 | len = left; | |
2087 | if (len > TMPBUFLEN-1) | |
2088 | len = TMPBUFLEN-1; | |
2089 | if (copy_from_user(buf, s, len)) | |
2090 | return -EFAULT; | |
2091 | buf[len] = 0; | |
2092 | p = buf; | |
2093 | if (*p == '-' && left > 1) { | |
2094 | neg = 1; | |
bd9b0bac | 2095 | p++; |
1da177e4 LT |
2096 | } |
2097 | if (*p < '0' || *p > '9') | |
2098 | break; | |
2099 | val = simple_strtoul(p, &p, 0) * convmul / convdiv ; | |
2100 | len = p-buf; | |
2101 | if ((len < left) && *p && !isspace(*p)) | |
2102 | break; | |
2103 | if (neg) | |
2104 | val = -val; | |
2105 | s += len; | |
2106 | left -= len; | |
2107 | ||
2108 | if(neg) | |
2109 | continue; | |
2110 | if ((min && val < *min) || (max && val > *max)) | |
2111 | continue; | |
2112 | *i = val; | |
2113 | } else { | |
2114 | p = buf; | |
2115 | if (!first) | |
2116 | *p++ = '\t'; | |
2117 | sprintf(p, "%lu", convdiv * (*i) / convmul); | |
2118 | len = strlen(buf); | |
2119 | if (len > left) | |
2120 | len = left; | |
2121 | if(copy_to_user(s, buf, len)) | |
2122 | return -EFAULT; | |
2123 | left -= len; | |
2124 | s += len; | |
2125 | } | |
2126 | } | |
2127 | ||
2128 | if (!write && !first && left) { | |
2129 | if(put_user('\n', s)) | |
2130 | return -EFAULT; | |
2131 | left--, s++; | |
2132 | } | |
2133 | if (write) { | |
2134 | while (left) { | |
2135 | char c; | |
2136 | if (get_user(c, s++)) | |
2137 | return -EFAULT; | |
2138 | if (!isspace(c)) | |
2139 | break; | |
2140 | left--; | |
2141 | } | |
2142 | } | |
2143 | if (write && first) | |
2144 | return -EINVAL; | |
2145 | *lenp -= left; | |
2146 | *ppos += *lenp; | |
2147 | return 0; | |
2148 | #undef TMPBUFLEN | |
2149 | } | |
2150 | ||
d8217f07 | 2151 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2152 | struct file *filp, |
2153 | void __user *buffer, | |
2154 | size_t *lenp, loff_t *ppos, | |
2155 | unsigned long convmul, | |
2156 | unsigned long convdiv) | |
2157 | { | |
2158 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
2159 | filp, buffer, lenp, ppos, convmul, convdiv); | |
2160 | } | |
2161 | ||
1da177e4 LT |
2162 | /** |
2163 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2164 | * @table: the sysctl table | |
2165 | * @write: %TRUE if this is a write to the sysctl file | |
2166 | * @filp: the file structure | |
2167 | * @buffer: the user buffer | |
2168 | * @lenp: the size of the user buffer | |
2169 | * @ppos: file position | |
2170 | * | |
2171 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2172 | * values from/to the user buffer, treated as an ASCII string. | |
2173 | * | |
2174 | * This routine will ensure the values are within the range specified by | |
2175 | * table->extra1 (min) and table->extra2 (max). | |
2176 | * | |
2177 | * Returns 0 on success. | |
2178 | */ | |
d8217f07 | 2179 | int proc_doulongvec_minmax(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2180 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2181 | { | |
2182 | return do_proc_doulongvec_minmax(table, write, filp, buffer, lenp, ppos, 1l, 1l); | |
2183 | } | |
2184 | ||
2185 | /** | |
2186 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2187 | * @table: the sysctl table | |
2188 | * @write: %TRUE if this is a write to the sysctl file | |
2189 | * @filp: the file structure | |
2190 | * @buffer: the user buffer | |
2191 | * @lenp: the size of the user buffer | |
2192 | * @ppos: file position | |
2193 | * | |
2194 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2195 | * values from/to the user buffer, treated as an ASCII string. The values | |
2196 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2197 | * | |
2198 | * This routine will ensure the values are within the range specified by | |
2199 | * table->extra1 (min) and table->extra2 (max). | |
2200 | * | |
2201 | * Returns 0 on success. | |
2202 | */ | |
d8217f07 | 2203 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2204 | struct file *filp, |
2205 | void __user *buffer, | |
2206 | size_t *lenp, loff_t *ppos) | |
2207 | { | |
2208 | return do_proc_doulongvec_minmax(table, write, filp, buffer, | |
2209 | lenp, ppos, HZ, 1000l); | |
2210 | } | |
2211 | ||
2212 | ||
2213 | static int do_proc_dointvec_jiffies_conv(int *negp, unsigned long *lvalp, | |
2214 | int *valp, | |
2215 | int write, void *data) | |
2216 | { | |
2217 | if (write) { | |
cba9f33d BS |
2218 | if (*lvalp > LONG_MAX / HZ) |
2219 | return 1; | |
1da177e4 LT |
2220 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2221 | } else { | |
2222 | int val = *valp; | |
2223 | unsigned long lval; | |
2224 | if (val < 0) { | |
2225 | *negp = -1; | |
2226 | lval = (unsigned long)-val; | |
2227 | } else { | |
2228 | *negp = 0; | |
2229 | lval = (unsigned long)val; | |
2230 | } | |
2231 | *lvalp = lval / HZ; | |
2232 | } | |
2233 | return 0; | |
2234 | } | |
2235 | ||
2236 | static int do_proc_dointvec_userhz_jiffies_conv(int *negp, unsigned long *lvalp, | |
2237 | int *valp, | |
2238 | int write, void *data) | |
2239 | { | |
2240 | if (write) { | |
cba9f33d BS |
2241 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2242 | return 1; | |
1da177e4 LT |
2243 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2244 | } else { | |
2245 | int val = *valp; | |
2246 | unsigned long lval; | |
2247 | if (val < 0) { | |
2248 | *negp = -1; | |
2249 | lval = (unsigned long)-val; | |
2250 | } else { | |
2251 | *negp = 0; | |
2252 | lval = (unsigned long)val; | |
2253 | } | |
2254 | *lvalp = jiffies_to_clock_t(lval); | |
2255 | } | |
2256 | return 0; | |
2257 | } | |
2258 | ||
2259 | static int do_proc_dointvec_ms_jiffies_conv(int *negp, unsigned long *lvalp, | |
2260 | int *valp, | |
2261 | int write, void *data) | |
2262 | { | |
2263 | if (write) { | |
2264 | *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); | |
2265 | } else { | |
2266 | int val = *valp; | |
2267 | unsigned long lval; | |
2268 | if (val < 0) { | |
2269 | *negp = -1; | |
2270 | lval = (unsigned long)-val; | |
2271 | } else { | |
2272 | *negp = 0; | |
2273 | lval = (unsigned long)val; | |
2274 | } | |
2275 | *lvalp = jiffies_to_msecs(lval); | |
2276 | } | |
2277 | return 0; | |
2278 | } | |
2279 | ||
2280 | /** | |
2281 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2282 | * @table: the sysctl table | |
2283 | * @write: %TRUE if this is a write to the sysctl file | |
2284 | * @filp: the file structure | |
2285 | * @buffer: the user buffer | |
2286 | * @lenp: the size of the user buffer | |
2287 | * @ppos: file position | |
2288 | * | |
2289 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2290 | * values from/to the user buffer, treated as an ASCII string. | |
2291 | * The values read are assumed to be in seconds, and are converted into | |
2292 | * jiffies. | |
2293 | * | |
2294 | * Returns 0 on success. | |
2295 | */ | |
d8217f07 | 2296 | int proc_dointvec_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2297 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2298 | { | |
2299 | return do_proc_dointvec(table,write,filp,buffer,lenp,ppos, | |
2300 | do_proc_dointvec_jiffies_conv,NULL); | |
2301 | } | |
2302 | ||
2303 | /** | |
2304 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2305 | * @table: the sysctl table | |
2306 | * @write: %TRUE if this is a write to the sysctl file | |
2307 | * @filp: the file structure | |
2308 | * @buffer: the user buffer | |
2309 | * @lenp: the size of the user buffer | |
1e5d5331 | 2310 | * @ppos: pointer to the file position |
1da177e4 LT |
2311 | * |
2312 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2313 | * values from/to the user buffer, treated as an ASCII string. | |
2314 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2315 | * are converted into jiffies. | |
2316 | * | |
2317 | * Returns 0 on success. | |
2318 | */ | |
d8217f07 | 2319 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2320 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2321 | { | |
2322 | return do_proc_dointvec(table,write,filp,buffer,lenp,ppos, | |
2323 | do_proc_dointvec_userhz_jiffies_conv,NULL); | |
2324 | } | |
2325 | ||
2326 | /** | |
2327 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2328 | * @table: the sysctl table | |
2329 | * @write: %TRUE if this is a write to the sysctl file | |
2330 | * @filp: the file structure | |
2331 | * @buffer: the user buffer | |
2332 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2333 | * @ppos: file position |
2334 | * @ppos: the current position in the file | |
1da177e4 LT |
2335 | * |
2336 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2337 | * values from/to the user buffer, treated as an ASCII string. | |
2338 | * The values read are assumed to be in 1/1000 seconds, and | |
2339 | * are converted into jiffies. | |
2340 | * | |
2341 | * Returns 0 on success. | |
2342 | */ | |
d8217f07 | 2343 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2344 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2345 | { | |
2346 | return do_proc_dointvec(table, write, filp, buffer, lenp, ppos, | |
2347 | do_proc_dointvec_ms_jiffies_conv, NULL); | |
2348 | } | |
2349 | ||
d8217f07 | 2350 | static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp, |
9ec52099 CLG |
2351 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2352 | { | |
2353 | struct pid *new_pid; | |
2354 | pid_t tmp; | |
2355 | int r; | |
2356 | ||
b488893a | 2357 | tmp = pid_nr_ns(cad_pid, current->nsproxy->pid_ns); |
9ec52099 CLG |
2358 | |
2359 | r = __do_proc_dointvec(&tmp, table, write, filp, buffer, | |
2360 | lenp, ppos, NULL, NULL); | |
2361 | if (r || !write) | |
2362 | return r; | |
2363 | ||
2364 | new_pid = find_get_pid(tmp); | |
2365 | if (!new_pid) | |
2366 | return -ESRCH; | |
2367 | ||
2368 | put_pid(xchg(&cad_pid, new_pid)); | |
2369 | return 0; | |
2370 | } | |
2371 | ||
1da177e4 LT |
2372 | #else /* CONFIG_PROC_FS */ |
2373 | ||
d8217f07 | 2374 | int proc_dostring(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2375 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2376 | { | |
2377 | return -ENOSYS; | |
2378 | } | |
2379 | ||
d8217f07 | 2380 | int proc_dointvec(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2381 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2382 | { | |
2383 | return -ENOSYS; | |
2384 | } | |
2385 | ||
d8217f07 | 2386 | int proc_dointvec_bset(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2387 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2388 | { | |
2389 | return -ENOSYS; | |
2390 | } | |
2391 | ||
d8217f07 | 2392 | int proc_dointvec_minmax(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2393 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2394 | { | |
2395 | return -ENOSYS; | |
2396 | } | |
2397 | ||
d8217f07 | 2398 | int proc_dointvec_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2399 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2400 | { | |
2401 | return -ENOSYS; | |
2402 | } | |
2403 | ||
d8217f07 | 2404 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2405 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2406 | { | |
2407 | return -ENOSYS; | |
2408 | } | |
2409 | ||
d8217f07 | 2410 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2411 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2412 | { | |
2413 | return -ENOSYS; | |
2414 | } | |
2415 | ||
d8217f07 | 2416 | int proc_doulongvec_minmax(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2417 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2418 | { | |
2419 | return -ENOSYS; | |
2420 | } | |
2421 | ||
d8217f07 | 2422 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2423 | struct file *filp, |
2424 | void __user *buffer, | |
2425 | size_t *lenp, loff_t *ppos) | |
2426 | { | |
2427 | return -ENOSYS; | |
2428 | } | |
2429 | ||
2430 | ||
2431 | #endif /* CONFIG_PROC_FS */ | |
2432 | ||
2433 | ||
b89a8171 | 2434 | #ifdef CONFIG_SYSCTL_SYSCALL |
1da177e4 LT |
2435 | /* |
2436 | * General sysctl support routines | |
2437 | */ | |
2438 | ||
49a0c458 EB |
2439 | /* The generic sysctl data routine (used if no strategy routine supplied) */ |
2440 | int sysctl_data(struct ctl_table *table, int __user *name, int nlen, | |
2441 | void __user *oldval, size_t __user *oldlenp, | |
2442 | void __user *newval, size_t newlen) | |
2443 | { | |
2444 | size_t len; | |
2445 | ||
2446 | /* Get out of I don't have a variable */ | |
2447 | if (!table->data || !table->maxlen) | |
2448 | return -ENOTDIR; | |
2449 | ||
2450 | if (oldval && oldlenp) { | |
2451 | if (get_user(len, oldlenp)) | |
2452 | return -EFAULT; | |
2453 | if (len) { | |
2454 | if (len > table->maxlen) | |
2455 | len = table->maxlen; | |
2456 | if (copy_to_user(oldval, table->data, len)) | |
2457 | return -EFAULT; | |
2458 | if (put_user(len, oldlenp)) | |
2459 | return -EFAULT; | |
2460 | } | |
2461 | } | |
2462 | ||
2463 | if (newval && newlen) { | |
2464 | if (newlen > table->maxlen) | |
2465 | newlen = table->maxlen; | |
2466 | ||
2467 | if (copy_from_user(table->data, newval, newlen)) | |
2468 | return -EFAULT; | |
2469 | } | |
2470 | return 1; | |
2471 | } | |
2472 | ||
1da177e4 | 2473 | /* The generic string strategy routine: */ |
d8217f07 | 2474 | int sysctl_string(struct ctl_table *table, int __user *name, int nlen, |
1da177e4 | 2475 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2476 | void __user *newval, size_t newlen) |
1da177e4 | 2477 | { |
1da177e4 LT |
2478 | if (!table->data || !table->maxlen) |
2479 | return -ENOTDIR; | |
2480 | ||
2481 | if (oldval && oldlenp) { | |
de9e007d LT |
2482 | size_t bufsize; |
2483 | if (get_user(bufsize, oldlenp)) | |
1da177e4 | 2484 | return -EFAULT; |
de9e007d LT |
2485 | if (bufsize) { |
2486 | size_t len = strlen(table->data), copied; | |
2487 | ||
2488 | /* This shouldn't trigger for a well-formed sysctl */ | |
2489 | if (len > table->maxlen) | |
1da177e4 | 2490 | len = table->maxlen; |
de9e007d LT |
2491 | |
2492 | /* Copy up to a max of bufsize-1 bytes of the string */ | |
2493 | copied = (len >= bufsize) ? bufsize - 1 : len; | |
2494 | ||
2495 | if (copy_to_user(oldval, table->data, copied) || | |
2496 | put_user(0, (char __user *)(oldval + copied))) | |
1da177e4 | 2497 | return -EFAULT; |
de9e007d | 2498 | if (put_user(len, oldlenp)) |
1da177e4 LT |
2499 | return -EFAULT; |
2500 | } | |
2501 | } | |
2502 | if (newval && newlen) { | |
de9e007d | 2503 | size_t len = newlen; |
1da177e4 LT |
2504 | if (len > table->maxlen) |
2505 | len = table->maxlen; | |
2506 | if(copy_from_user(table->data, newval, len)) | |
2507 | return -EFAULT; | |
2508 | if (len == table->maxlen) | |
2509 | len--; | |
2510 | ((char *) table->data)[len] = 0; | |
2511 | } | |
82c9df82 | 2512 | return 1; |
1da177e4 LT |
2513 | } |
2514 | ||
2515 | /* | |
2516 | * This function makes sure that all of the integers in the vector | |
2517 | * are between the minimum and maximum values given in the arrays | |
2518 | * table->extra1 and table->extra2, respectively. | |
2519 | */ | |
d8217f07 | 2520 | int sysctl_intvec(struct ctl_table *table, int __user *name, int nlen, |
1da177e4 | 2521 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2522 | void __user *newval, size_t newlen) |
1da177e4 LT |
2523 | { |
2524 | ||
2525 | if (newval && newlen) { | |
2526 | int __user *vec = (int __user *) newval; | |
2527 | int *min = (int *) table->extra1; | |
2528 | int *max = (int *) table->extra2; | |
2529 | size_t length; | |
2530 | int i; | |
2531 | ||
2532 | if (newlen % sizeof(int) != 0) | |
2533 | return -EINVAL; | |
2534 | ||
2535 | if (!table->extra1 && !table->extra2) | |
2536 | return 0; | |
2537 | ||
2538 | if (newlen > table->maxlen) | |
2539 | newlen = table->maxlen; | |
2540 | length = newlen / sizeof(int); | |
2541 | ||
2542 | for (i = 0; i < length; i++) { | |
2543 | int value; | |
2544 | if (get_user(value, vec + i)) | |
2545 | return -EFAULT; | |
2546 | if (min && value < min[i]) | |
2547 | return -EINVAL; | |
2548 | if (max && value > max[i]) | |
2549 | return -EINVAL; | |
2550 | } | |
2551 | } | |
2552 | return 0; | |
2553 | } | |
2554 | ||
2555 | /* Strategy function to convert jiffies to seconds */ | |
d8217f07 | 2556 | int sysctl_jiffies(struct ctl_table *table, int __user *name, int nlen, |
1da177e4 | 2557 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2558 | void __user *newval, size_t newlen) |
1da177e4 | 2559 | { |
3ee75ac3 | 2560 | if (oldval && oldlenp) { |
1da177e4 | 2561 | size_t olen; |
3ee75ac3 AD |
2562 | |
2563 | if (get_user(olen, oldlenp)) | |
2564 | return -EFAULT; | |
2565 | if (olen) { | |
2566 | int val; | |
2567 | ||
2568 | if (olen < sizeof(int)) | |
2569 | return -EINVAL; | |
2570 | ||
2571 | val = *(int *)(table->data) / HZ; | |
2572 | if (put_user(val, (int __user *)oldval)) | |
2573 | return -EFAULT; | |
2574 | if (put_user(sizeof(int), oldlenp)) | |
1da177e4 | 2575 | return -EFAULT; |
1da177e4 | 2576 | } |
1da177e4 LT |
2577 | } |
2578 | if (newval && newlen) { | |
2579 | int new; | |
2580 | if (newlen != sizeof(int)) | |
2581 | return -EINVAL; | |
2582 | if (get_user(new, (int __user *)newval)) | |
2583 | return -EFAULT; | |
2584 | *(int *)(table->data) = new*HZ; | |
2585 | } | |
2586 | return 1; | |
2587 | } | |
2588 | ||
2589 | /* Strategy function to convert jiffies to seconds */ | |
d8217f07 | 2590 | int sysctl_ms_jiffies(struct ctl_table *table, int __user *name, int nlen, |
1da177e4 | 2591 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2592 | void __user *newval, size_t newlen) |
1da177e4 | 2593 | { |
3ee75ac3 | 2594 | if (oldval && oldlenp) { |
1da177e4 | 2595 | size_t olen; |
3ee75ac3 AD |
2596 | |
2597 | if (get_user(olen, oldlenp)) | |
2598 | return -EFAULT; | |
2599 | if (olen) { | |
2600 | int val; | |
2601 | ||
2602 | if (olen < sizeof(int)) | |
2603 | return -EINVAL; | |
2604 | ||
2605 | val = jiffies_to_msecs(*(int *)(table->data)); | |
2606 | if (put_user(val, (int __user *)oldval)) | |
2607 | return -EFAULT; | |
2608 | if (put_user(sizeof(int), oldlenp)) | |
1da177e4 | 2609 | return -EFAULT; |
1da177e4 | 2610 | } |
1da177e4 LT |
2611 | } |
2612 | if (newval && newlen) { | |
2613 | int new; | |
2614 | if (newlen != sizeof(int)) | |
2615 | return -EINVAL; | |
2616 | if (get_user(new, (int __user *)newval)) | |
2617 | return -EFAULT; | |
2618 | *(int *)(table->data) = msecs_to_jiffies(new); | |
2619 | } | |
2620 | return 1; | |
2621 | } | |
2622 | ||
c4b8b769 | 2623 | |
c4b8b769 | 2624 | |
b89a8171 | 2625 | #else /* CONFIG_SYSCTL_SYSCALL */ |
1da177e4 LT |
2626 | |
2627 | ||
2628 | asmlinkage long sys_sysctl(struct __sysctl_args __user *args) | |
2629 | { | |
0e009be8 | 2630 | struct __sysctl_args tmp; |
7058cb02 | 2631 | int error; |
0e009be8 | 2632 | |
0e009be8 EB |
2633 | if (copy_from_user(&tmp, args, sizeof(tmp))) |
2634 | return -EFAULT; | |
0e009be8 | 2635 | |
7058cb02 | 2636 | error = deprecated_sysctl_warning(&tmp); |
b89a8171 | 2637 | |
7058cb02 EB |
2638 | /* If no error reading the parameters then just -ENOSYS ... */ |
2639 | if (!error) | |
2640 | error = -ENOSYS; | |
2641 | ||
2642 | return error; | |
1da177e4 LT |
2643 | } |
2644 | ||
49a0c458 EB |
2645 | int sysctl_data(struct ctl_table *table, int __user *name, int nlen, |
2646 | void __user *oldval, size_t __user *oldlenp, | |
2647 | void __user *newval, size_t newlen) | |
2648 | { | |
2649 | return -ENOSYS; | |
2650 | } | |
2651 | ||
d8217f07 | 2652 | int sysctl_string(struct ctl_table *table, int __user *name, int nlen, |
1da177e4 | 2653 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2654 | void __user *newval, size_t newlen) |
1da177e4 LT |
2655 | { |
2656 | return -ENOSYS; | |
2657 | } | |
2658 | ||
d8217f07 | 2659 | int sysctl_intvec(struct ctl_table *table, int __user *name, int nlen, |
1da177e4 | 2660 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2661 | void __user *newval, size_t newlen) |
1da177e4 LT |
2662 | { |
2663 | return -ENOSYS; | |
2664 | } | |
2665 | ||
d8217f07 | 2666 | int sysctl_jiffies(struct ctl_table *table, int __user *name, int nlen, |
1da177e4 | 2667 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2668 | void __user *newval, size_t newlen) |
1da177e4 LT |
2669 | { |
2670 | return -ENOSYS; | |
2671 | } | |
2672 | ||
d8217f07 | 2673 | int sysctl_ms_jiffies(struct ctl_table *table, int __user *name, int nlen, |
1da177e4 | 2674 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2675 | void __user *newval, size_t newlen) |
1da177e4 LT |
2676 | { |
2677 | return -ENOSYS; | |
2678 | } | |
2679 | ||
b89a8171 | 2680 | #endif /* CONFIG_SYSCTL_SYSCALL */ |
1da177e4 | 2681 | |
7058cb02 EB |
2682 | static int deprecated_sysctl_warning(struct __sysctl_args *args) |
2683 | { | |
2684 | static int msg_count; | |
2685 | int name[CTL_MAXNAME]; | |
2686 | int i; | |
2687 | ||
6fc48af8 TH |
2688 | /* Check args->nlen. */ |
2689 | if (args->nlen < 0 || args->nlen > CTL_MAXNAME) | |
2690 | return -ENOTDIR; | |
2691 | ||
7058cb02 EB |
2692 | /* Read in the sysctl name for better debug message logging */ |
2693 | for (i = 0; i < args->nlen; i++) | |
2694 | if (get_user(name[i], args->name + i)) | |
2695 | return -EFAULT; | |
2696 | ||
2697 | /* Ignore accesses to kernel.version */ | |
2698 | if ((args->nlen == 2) && (name[0] == CTL_KERN) && (name[1] == KERN_VERSION)) | |
2699 | return 0; | |
2700 | ||
2701 | if (msg_count < 5) { | |
2702 | msg_count++; | |
2703 | printk(KERN_INFO | |
2704 | "warning: process `%s' used the deprecated sysctl " | |
2705 | "system call with ", current->comm); | |
2706 | for (i = 0; i < args->nlen; i++) | |
2707 | printk("%d.", name[i]); | |
2708 | printk("\n"); | |
2709 | } | |
2710 | return 0; | |
2711 | } | |
2712 | ||
1da177e4 LT |
2713 | /* |
2714 | * No sense putting this after each symbol definition, twice, | |
2715 | * exception granted :-) | |
2716 | */ | |
2717 | EXPORT_SYMBOL(proc_dointvec); | |
2718 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2719 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2720 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2721 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2722 | EXPORT_SYMBOL(proc_dostring); | |
2723 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2724 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); | |
2725 | EXPORT_SYMBOL(register_sysctl_table); | |
2726 | EXPORT_SYMBOL(sysctl_intvec); | |
2727 | EXPORT_SYMBOL(sysctl_jiffies); | |
2728 | EXPORT_SYMBOL(sysctl_ms_jiffies); | |
2729 | EXPORT_SYMBOL(sysctl_string); | |
49a0c458 | 2730 | EXPORT_SYMBOL(sysctl_data); |
1da177e4 | 2731 | EXPORT_SYMBOL(unregister_sysctl_table); |