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Commit | Line | Data |
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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> | |
dfec072e | 30 | #include <linux/kmemcheck.h> |
1da177e4 | 31 | #include <linux/smp_lock.h> |
62239ac2 | 32 | #include <linux/fs.h> |
1da177e4 LT |
33 | #include <linux/init.h> |
34 | #include <linux/kernel.h> | |
0296b228 | 35 | #include <linux/kobject.h> |
20380731 | 36 | #include <linux/net.h> |
1da177e4 LT |
37 | #include <linux/sysrq.h> |
38 | #include <linux/highuid.h> | |
39 | #include <linux/writeback.h> | |
40 | #include <linux/hugetlb.h> | |
1da177e4 | 41 | #include <linux/initrd.h> |
0b77f5bf | 42 | #include <linux/key.h> |
1da177e4 LT |
43 | #include <linux/times.h> |
44 | #include <linux/limits.h> | |
45 | #include <linux/dcache.h> | |
46 | #include <linux/syscalls.h> | |
c748e134 | 47 | #include <linux/vmstat.h> |
c255d844 PM |
48 | #include <linux/nfs_fs.h> |
49 | #include <linux/acpi.h> | |
10a0a8d4 | 50 | #include <linux/reboot.h> |
b0fc494f | 51 | #include <linux/ftrace.h> |
12e22c5e | 52 | #include <linux/slow-work.h> |
1ccd1549 | 53 | #include <linux/perf_counter.h> |
1da177e4 LT |
54 | |
55 | #include <asm/uaccess.h> | |
56 | #include <asm/processor.h> | |
57 | ||
29cbc78b AK |
58 | #ifdef CONFIG_X86 |
59 | #include <asm/nmi.h> | |
0741f4d2 | 60 | #include <asm/stacktrace.h> |
6e7c4025 | 61 | #include <asm/io.h> |
29cbc78b AK |
62 | #endif |
63 | ||
7058cb02 EB |
64 | static int deprecated_sysctl_warning(struct __sysctl_args *args); |
65 | ||
1da177e4 LT |
66 | #if defined(CONFIG_SYSCTL) |
67 | ||
68 | /* External variables not in a header file. */ | |
69 | extern int C_A_D; | |
45807a1d | 70 | extern int print_fatal_signals; |
1da177e4 LT |
71 | extern int sysctl_overcommit_memory; |
72 | extern int sysctl_overcommit_ratio; | |
fadd8fbd | 73 | extern int sysctl_panic_on_oom; |
fe071d7e | 74 | extern int sysctl_oom_kill_allocating_task; |
fef1bdd6 | 75 | extern int sysctl_oom_dump_tasks; |
1da177e4 | 76 | extern int max_threads; |
1da177e4 | 77 | extern int core_uses_pid; |
d6e71144 | 78 | extern int suid_dumpable; |
1da177e4 | 79 | extern char core_pattern[]; |
1da177e4 LT |
80 | extern int pid_max; |
81 | extern int min_free_kbytes; | |
1da177e4 | 82 | extern int pid_max_min, pid_max_max; |
9d0243bc | 83 | extern int sysctl_drop_caches; |
8ad4b1fb | 84 | extern int percpu_pagelist_fraction; |
bebfa101 | 85 | extern int compat_log; |
9745512c | 86 | extern int latencytop_enabled; |
eceea0b3 | 87 | extern int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
88 | #ifndef CONFIG_MMU |
89 | extern int sysctl_nr_trim_pages; | |
90 | #endif | |
31a72bce PM |
91 | #ifdef CONFIG_RCU_TORTURE_TEST |
92 | extern int rcutorture_runnable; | |
93 | #endif /* #ifdef CONFIG_RCU_TORTURE_TEST */ | |
cb684b5b | 94 | #ifdef CONFIG_BLOCK |
5e605b64 | 95 | extern int blk_iopoll_enabled; |
cb684b5b | 96 | #endif |
1da177e4 | 97 | |
c4f3b63f | 98 | /* Constants used for minimum and maximum */ |
195cf453 | 99 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
c4f3b63f | 100 | static int sixty = 60; |
9383d967 | 101 | static int neg_one = -1; |
c4f3b63f RT |
102 | #endif |
103 | ||
c4f3b63f | 104 | static int zero; |
cd5f9a4c LT |
105 | static int __maybe_unused one = 1; |
106 | static int __maybe_unused two = 2; | |
fc3501d4 | 107 | static unsigned long one_ul = 1; |
c4f3b63f RT |
108 | static int one_hundred = 100; |
109 | ||
9e4a5bda AR |
110 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
111 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
112 | ||
1da177e4 LT |
113 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
114 | static int maxolduid = 65535; | |
115 | static int minolduid; | |
8ad4b1fb | 116 | static int min_percpu_pagelist_fract = 8; |
1da177e4 LT |
117 | |
118 | static int ngroups_max = NGROUPS_MAX; | |
119 | ||
a1ef5adb | 120 | #ifdef CONFIG_MODULES |
1da177e4 | 121 | extern char modprobe_path[]; |
3d43321b | 122 | extern int modules_disabled; |
1da177e4 | 123 | #endif |
1da177e4 LT |
124 | #ifdef CONFIG_CHR_DEV_SG |
125 | extern int sg_big_buff; | |
126 | #endif | |
1da177e4 | 127 | |
72c57ed5 | 128 | #ifdef CONFIG_SPARC |
17f04fbb | 129 | #include <asm/system.h> |
1da177e4 LT |
130 | #endif |
131 | ||
0871420f DM |
132 | #ifdef CONFIG_SPARC64 |
133 | extern int sysctl_tsb_ratio; | |
134 | #endif | |
135 | ||
1da177e4 LT |
136 | #ifdef __hppa__ |
137 | extern int pwrsw_enabled; | |
138 | extern int unaligned_enabled; | |
139 | #endif | |
140 | ||
347a8dc3 | 141 | #ifdef CONFIG_S390 |
1da177e4 LT |
142 | #ifdef CONFIG_MATHEMU |
143 | extern int sysctl_ieee_emulation_warnings; | |
144 | #endif | |
145 | extern int sysctl_userprocess_debug; | |
951f22d5 | 146 | extern int spin_retry; |
1da177e4 LT |
147 | #endif |
148 | ||
1da177e4 LT |
149 | #ifdef CONFIG_BSD_PROCESS_ACCT |
150 | extern int acct_parm[]; | |
151 | #endif | |
152 | ||
d2b176ed JS |
153 | #ifdef CONFIG_IA64 |
154 | extern int no_unaligned_warning; | |
88fc241f | 155 | extern int unaligned_dump_stack; |
d2b176ed JS |
156 | #endif |
157 | ||
23f78d4a IM |
158 | #ifdef CONFIG_RT_MUTEXES |
159 | extern int max_lock_depth; | |
160 | #endif | |
161 | ||
d6f8ff73 | 162 | #ifdef CONFIG_PROC_SYSCTL |
d8217f07 | 163 | static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp, |
9ec52099 | 164 | void __user *buffer, size_t *lenp, loff_t *ppos); |
25ddbb18 | 165 | static int proc_taint(struct ctl_table *table, int write, struct file *filp, |
34f5a398 | 166 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 167 | #endif |
9ec52099 | 168 | |
d8217f07 | 169 | static struct ctl_table root_table[]; |
e51b6ba0 EB |
170 | static struct ctl_table_root sysctl_table_root; |
171 | static struct ctl_table_header root_table_header = { | |
b380b0d4 | 172 | .count = 1, |
e51b6ba0 | 173 | .ctl_table = root_table, |
73455092 | 174 | .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list), |
e51b6ba0 | 175 | .root = &sysctl_table_root, |
73455092 | 176 | .set = &sysctl_table_root.default_set, |
e51b6ba0 EB |
177 | }; |
178 | static struct ctl_table_root sysctl_table_root = { | |
179 | .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list), | |
73455092 | 180 | .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry), |
e51b6ba0 | 181 | }; |
1da177e4 | 182 | |
d8217f07 EB |
183 | static struct ctl_table kern_table[]; |
184 | static struct ctl_table vm_table[]; | |
185 | static struct ctl_table fs_table[]; | |
186 | static struct ctl_table debug_table[]; | |
187 | static struct ctl_table dev_table[]; | |
188 | extern struct ctl_table random_table[]; | |
2d9048e2 | 189 | #ifdef CONFIG_INOTIFY_USER |
d8217f07 | 190 | extern struct ctl_table inotify_table[]; |
0399cb08 | 191 | #endif |
7ef9964e DL |
192 | #ifdef CONFIG_EPOLL |
193 | extern struct ctl_table epoll_table[]; | |
194 | #endif | |
1da177e4 LT |
195 | |
196 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
197 | int sysctl_legacy_va_layout; | |
198 | #endif | |
199 | ||
f20786ff PZ |
200 | extern int prove_locking; |
201 | extern int lock_stat; | |
9bc9a6bd | 202 | |
1da177e4 LT |
203 | /* The default sysctl tables: */ |
204 | ||
d8217f07 | 205 | static struct ctl_table root_table[] = { |
1da177e4 LT |
206 | { |
207 | .ctl_name = CTL_KERN, | |
208 | .procname = "kernel", | |
209 | .mode = 0555, | |
210 | .child = kern_table, | |
211 | }, | |
212 | { | |
213 | .ctl_name = CTL_VM, | |
214 | .procname = "vm", | |
215 | .mode = 0555, | |
216 | .child = vm_table, | |
217 | }, | |
1da177e4 LT |
218 | { |
219 | .ctl_name = CTL_FS, | |
220 | .procname = "fs", | |
221 | .mode = 0555, | |
222 | .child = fs_table, | |
223 | }, | |
224 | { | |
225 | .ctl_name = CTL_DEBUG, | |
226 | .procname = "debug", | |
227 | .mode = 0555, | |
228 | .child = debug_table, | |
229 | }, | |
230 | { | |
231 | .ctl_name = CTL_DEV, | |
232 | .procname = "dev", | |
233 | .mode = 0555, | |
234 | .child = dev_table, | |
235 | }, | |
2be7fe07 AM |
236 | /* |
237 | * NOTE: do not add new entries to this table unless you have read | |
238 | * Documentation/sysctl/ctl_unnumbered.txt | |
239 | */ | |
1da177e4 LT |
240 | { .ctl_name = 0 } |
241 | }; | |
242 | ||
77e54a1f | 243 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
244 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
245 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
246 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
247 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
77e54a1f IM |
248 | #endif |
249 | ||
d8217f07 | 250 | static struct ctl_table kern_table[] = { |
2bba22c5 MG |
251 | { |
252 | .ctl_name = CTL_UNNUMBERED, | |
253 | .procname = "sched_child_runs_first", | |
254 | .data = &sysctl_sched_child_runs_first, | |
255 | .maxlen = sizeof(unsigned int), | |
256 | .mode = 0644, | |
257 | .proc_handler = &proc_dointvec, | |
258 | }, | |
77e54a1f IM |
259 | #ifdef CONFIG_SCHED_DEBUG |
260 | { | |
261 | .ctl_name = CTL_UNNUMBERED, | |
b2be5e96 PZ |
262 | .procname = "sched_min_granularity_ns", |
263 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
264 | .maxlen = sizeof(unsigned int), |
265 | .mode = 0644, | |
b2be5e96 PZ |
266 | .proc_handler = &sched_nr_latency_handler, |
267 | .strategy = &sysctl_intvec, | |
268 | .extra1 = &min_sched_granularity_ns, | |
269 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 270 | }, |
21805085 PZ |
271 | { |
272 | .ctl_name = CTL_UNNUMBERED, | |
273 | .procname = "sched_latency_ns", | |
274 | .data = &sysctl_sched_latency, | |
275 | .maxlen = sizeof(unsigned int), | |
276 | .mode = 0644, | |
b2be5e96 | 277 | .proc_handler = &sched_nr_latency_handler, |
21805085 PZ |
278 | .strategy = &sysctl_intvec, |
279 | .extra1 = &min_sched_granularity_ns, | |
280 | .extra2 = &max_sched_granularity_ns, | |
281 | }, | |
77e54a1f IM |
282 | { |
283 | .ctl_name = CTL_UNNUMBERED, | |
284 | .procname = "sched_wakeup_granularity_ns", | |
285 | .data = &sysctl_sched_wakeup_granularity, | |
286 | .maxlen = sizeof(unsigned int), | |
287 | .mode = 0644, | |
288 | .proc_handler = &proc_dointvec_minmax, | |
289 | .strategy = &sysctl_intvec, | |
77e54a1f IM |
290 | .extra1 = &min_wakeup_granularity_ns, |
291 | .extra2 = &max_wakeup_granularity_ns, | |
292 | }, | |
2398f2c6 PZ |
293 | { |
294 | .ctl_name = CTL_UNNUMBERED, | |
295 | .procname = "sched_shares_ratelimit", | |
296 | .data = &sysctl_sched_shares_ratelimit, | |
297 | .maxlen = sizeof(unsigned int), | |
298 | .mode = 0644, | |
299 | .proc_handler = &proc_dointvec, | |
300 | }, | |
ffda12a1 PZ |
301 | { |
302 | .ctl_name = CTL_UNNUMBERED, | |
303 | .procname = "sched_shares_thresh", | |
304 | .data = &sysctl_sched_shares_thresh, | |
305 | .maxlen = sizeof(unsigned int), | |
306 | .mode = 0644, | |
307 | .proc_handler = &proc_dointvec_minmax, | |
308 | .strategy = &sysctl_intvec, | |
309 | .extra1 = &zero, | |
310 | }, | |
1fc84aaa PZ |
311 | { |
312 | .ctl_name = CTL_UNNUMBERED, | |
313 | .procname = "sched_features", | |
314 | .data = &sysctl_sched_features, | |
315 | .maxlen = sizeof(unsigned int), | |
316 | .mode = 0644, | |
317 | .proc_handler = &proc_dointvec, | |
318 | }, | |
da84d961 IM |
319 | { |
320 | .ctl_name = CTL_UNNUMBERED, | |
321 | .procname = "sched_migration_cost", | |
322 | .data = &sysctl_sched_migration_cost, | |
323 | .maxlen = sizeof(unsigned int), | |
324 | .mode = 0644, | |
325 | .proc_handler = &proc_dointvec, | |
326 | }, | |
b82d9fdd PZ |
327 | { |
328 | .ctl_name = CTL_UNNUMBERED, | |
329 | .procname = "sched_nr_migrate", | |
330 | .data = &sysctl_sched_nr_migrate, | |
331 | .maxlen = sizeof(unsigned int), | |
fa85ae24 PZ |
332 | .mode = 0644, |
333 | .proc_handler = &proc_dointvec, | |
334 | }, | |
e9e9250b PZ |
335 | { |
336 | .ctl_name = CTL_UNNUMBERED, | |
337 | .procname = "sched_time_avg", | |
338 | .data = &sysctl_sched_time_avg, | |
339 | .maxlen = sizeof(unsigned int), | |
340 | .mode = 0644, | |
341 | .proc_handler = &proc_dointvec, | |
342 | }, | |
cd1bb94b AB |
343 | { |
344 | .ctl_name = CTL_UNNUMBERED, | |
345 | .procname = "timer_migration", | |
346 | .data = &sysctl_timer_migration, | |
347 | .maxlen = sizeof(unsigned int), | |
348 | .mode = 0644, | |
bfdb4d9f AB |
349 | .proc_handler = &proc_dointvec_minmax, |
350 | .strategy = &sysctl_intvec, | |
351 | .extra1 = &zero, | |
352 | .extra2 = &one, | |
fa85ae24 | 353 | }, |
1fc84aaa | 354 | #endif |
9f0c1e56 PZ |
355 | { |
356 | .ctl_name = CTL_UNNUMBERED, | |
357 | .procname = "sched_rt_period_us", | |
358 | .data = &sysctl_sched_rt_period, | |
359 | .maxlen = sizeof(unsigned int), | |
360 | .mode = 0644, | |
d0b27fa7 | 361 | .proc_handler = &sched_rt_handler, |
9f0c1e56 PZ |
362 | }, |
363 | { | |
364 | .ctl_name = CTL_UNNUMBERED, | |
365 | .procname = "sched_rt_runtime_us", | |
366 | .data = &sysctl_sched_rt_runtime, | |
367 | .maxlen = sizeof(int), | |
368 | .mode = 0644, | |
d0b27fa7 | 369 | .proc_handler = &sched_rt_handler, |
9f0c1e56 | 370 | }, |
1799e35d IM |
371 | { |
372 | .ctl_name = CTL_UNNUMBERED, | |
373 | .procname = "sched_compat_yield", | |
374 | .data = &sysctl_sched_compat_yield, | |
375 | .maxlen = sizeof(unsigned int), | |
376 | .mode = 0644, | |
377 | .proc_handler = &proc_dointvec, | |
378 | }, | |
f20786ff PZ |
379 | #ifdef CONFIG_PROVE_LOCKING |
380 | { | |
381 | .ctl_name = CTL_UNNUMBERED, | |
382 | .procname = "prove_locking", | |
383 | .data = &prove_locking, | |
384 | .maxlen = sizeof(int), | |
385 | .mode = 0644, | |
386 | .proc_handler = &proc_dointvec, | |
387 | }, | |
388 | #endif | |
389 | #ifdef CONFIG_LOCK_STAT | |
390 | { | |
391 | .ctl_name = CTL_UNNUMBERED, | |
392 | .procname = "lock_stat", | |
393 | .data = &lock_stat, | |
394 | .maxlen = sizeof(int), | |
395 | .mode = 0644, | |
396 | .proc_handler = &proc_dointvec, | |
397 | }, | |
77e54a1f | 398 | #endif |
1da177e4 LT |
399 | { |
400 | .ctl_name = KERN_PANIC, | |
401 | .procname = "panic", | |
402 | .data = &panic_timeout, | |
403 | .maxlen = sizeof(int), | |
404 | .mode = 0644, | |
405 | .proc_handler = &proc_dointvec, | |
406 | }, | |
407 | { | |
408 | .ctl_name = KERN_CORE_USES_PID, | |
409 | .procname = "core_uses_pid", | |
410 | .data = &core_uses_pid, | |
411 | .maxlen = sizeof(int), | |
412 | .mode = 0644, | |
413 | .proc_handler = &proc_dointvec, | |
414 | }, | |
415 | { | |
416 | .ctl_name = KERN_CORE_PATTERN, | |
417 | .procname = "core_pattern", | |
418 | .data = core_pattern, | |
71ce92f3 | 419 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 LT |
420 | .mode = 0644, |
421 | .proc_handler = &proc_dostring, | |
422 | .strategy = &sysctl_string, | |
423 | }, | |
34f5a398 | 424 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 425 | { |
1da177e4 | 426 | .procname = "tainted", |
25ddbb18 | 427 | .maxlen = sizeof(long), |
34f5a398 | 428 | .mode = 0644, |
25ddbb18 | 429 | .proc_handler = &proc_taint, |
1da177e4 | 430 | }, |
34f5a398 | 431 | #endif |
9745512c AV |
432 | #ifdef CONFIG_LATENCYTOP |
433 | { | |
434 | .procname = "latencytop", | |
435 | .data = &latencytop_enabled, | |
436 | .maxlen = sizeof(int), | |
437 | .mode = 0644, | |
438 | .proc_handler = &proc_dointvec, | |
439 | }, | |
440 | #endif | |
1da177e4 LT |
441 | #ifdef CONFIG_BLK_DEV_INITRD |
442 | { | |
443 | .ctl_name = KERN_REALROOTDEV, | |
444 | .procname = "real-root-dev", | |
445 | .data = &real_root_dev, | |
446 | .maxlen = sizeof(int), | |
447 | .mode = 0644, | |
448 | .proc_handler = &proc_dointvec, | |
449 | }, | |
450 | #endif | |
45807a1d IM |
451 | { |
452 | .ctl_name = CTL_UNNUMBERED, | |
453 | .procname = "print-fatal-signals", | |
454 | .data = &print_fatal_signals, | |
455 | .maxlen = sizeof(int), | |
456 | .mode = 0644, | |
457 | .proc_handler = &proc_dointvec, | |
458 | }, | |
72c57ed5 | 459 | #ifdef CONFIG_SPARC |
1da177e4 LT |
460 | { |
461 | .ctl_name = KERN_SPARC_REBOOT, | |
462 | .procname = "reboot-cmd", | |
463 | .data = reboot_command, | |
464 | .maxlen = 256, | |
465 | .mode = 0644, | |
466 | .proc_handler = &proc_dostring, | |
467 | .strategy = &sysctl_string, | |
468 | }, | |
469 | { | |
470 | .ctl_name = KERN_SPARC_STOP_A, | |
471 | .procname = "stop-a", | |
472 | .data = &stop_a_enabled, | |
473 | .maxlen = sizeof (int), | |
474 | .mode = 0644, | |
475 | .proc_handler = &proc_dointvec, | |
476 | }, | |
477 | { | |
478 | .ctl_name = KERN_SPARC_SCONS_PWROFF, | |
479 | .procname = "scons-poweroff", | |
480 | .data = &scons_pwroff, | |
481 | .maxlen = sizeof (int), | |
482 | .mode = 0644, | |
483 | .proc_handler = &proc_dointvec, | |
484 | }, | |
485 | #endif | |
0871420f DM |
486 | #ifdef CONFIG_SPARC64 |
487 | { | |
488 | .ctl_name = CTL_UNNUMBERED, | |
489 | .procname = "tsb-ratio", | |
490 | .data = &sysctl_tsb_ratio, | |
491 | .maxlen = sizeof (int), | |
492 | .mode = 0644, | |
493 | .proc_handler = &proc_dointvec, | |
494 | }, | |
495 | #endif | |
1da177e4 LT |
496 | #ifdef __hppa__ |
497 | { | |
498 | .ctl_name = KERN_HPPA_PWRSW, | |
499 | .procname = "soft-power", | |
500 | .data = &pwrsw_enabled, | |
501 | .maxlen = sizeof (int), | |
502 | .mode = 0644, | |
503 | .proc_handler = &proc_dointvec, | |
504 | }, | |
505 | { | |
506 | .ctl_name = KERN_HPPA_UNALIGNED, | |
507 | .procname = "unaligned-trap", | |
508 | .data = &unaligned_enabled, | |
509 | .maxlen = sizeof (int), | |
510 | .mode = 0644, | |
511 | .proc_handler = &proc_dointvec, | |
512 | }, | |
513 | #endif | |
514 | { | |
515 | .ctl_name = KERN_CTLALTDEL, | |
516 | .procname = "ctrl-alt-del", | |
517 | .data = &C_A_D, | |
518 | .maxlen = sizeof(int), | |
519 | .mode = 0644, | |
520 | .proc_handler = &proc_dointvec, | |
521 | }, | |
606576ce | 522 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f SR |
523 | { |
524 | .ctl_name = CTL_UNNUMBERED, | |
525 | .procname = "ftrace_enabled", | |
526 | .data = &ftrace_enabled, | |
527 | .maxlen = sizeof(int), | |
528 | .mode = 0644, | |
529 | .proc_handler = &ftrace_enable_sysctl, | |
530 | }, | |
531 | #endif | |
f38f1d2a SR |
532 | #ifdef CONFIG_STACK_TRACER |
533 | { | |
534 | .ctl_name = CTL_UNNUMBERED, | |
535 | .procname = "stack_tracer_enabled", | |
536 | .data = &stack_tracer_enabled, | |
537 | .maxlen = sizeof(int), | |
538 | .mode = 0644, | |
539 | .proc_handler = &stack_trace_sysctl, | |
540 | }, | |
541 | #endif | |
944ac425 SR |
542 | #ifdef CONFIG_TRACING |
543 | { | |
544 | .ctl_name = CTL_UNNUMBERED, | |
3299b4dd | 545 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
546 | .data = &ftrace_dump_on_oops, |
547 | .maxlen = sizeof(int), | |
548 | .mode = 0644, | |
549 | .proc_handler = &proc_dointvec, | |
550 | }, | |
551 | #endif | |
a1ef5adb | 552 | #ifdef CONFIG_MODULES |
1da177e4 LT |
553 | { |
554 | .ctl_name = KERN_MODPROBE, | |
555 | .procname = "modprobe", | |
556 | .data = &modprobe_path, | |
557 | .maxlen = KMOD_PATH_LEN, | |
558 | .mode = 0644, | |
559 | .proc_handler = &proc_dostring, | |
560 | .strategy = &sysctl_string, | |
561 | }, | |
3d43321b KC |
562 | { |
563 | .ctl_name = CTL_UNNUMBERED, | |
564 | .procname = "modules_disabled", | |
565 | .data = &modules_disabled, | |
566 | .maxlen = sizeof(int), | |
567 | .mode = 0644, | |
568 | /* only handle a transition from default "0" to "1" */ | |
569 | .proc_handler = &proc_dointvec_minmax, | |
570 | .extra1 = &one, | |
571 | .extra2 = &one, | |
572 | }, | |
1da177e4 | 573 | #endif |
57ae2508 | 574 | #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET) |
1da177e4 LT |
575 | { |
576 | .ctl_name = KERN_HOTPLUG, | |
577 | .procname = "hotplug", | |
312c004d KS |
578 | .data = &uevent_helper, |
579 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 LT |
580 | .mode = 0644, |
581 | .proc_handler = &proc_dostring, | |
582 | .strategy = &sysctl_string, | |
583 | }, | |
584 | #endif | |
585 | #ifdef CONFIG_CHR_DEV_SG | |
586 | { | |
587 | .ctl_name = KERN_SG_BIG_BUFF, | |
588 | .procname = "sg-big-buff", | |
589 | .data = &sg_big_buff, | |
590 | .maxlen = sizeof (int), | |
591 | .mode = 0444, | |
592 | .proc_handler = &proc_dointvec, | |
593 | }, | |
594 | #endif | |
595 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
596 | { | |
597 | .ctl_name = KERN_ACCT, | |
598 | .procname = "acct", | |
599 | .data = &acct_parm, | |
600 | .maxlen = 3*sizeof(int), | |
601 | .mode = 0644, | |
602 | .proc_handler = &proc_dointvec, | |
603 | }, | |
604 | #endif | |
1da177e4 LT |
605 | #ifdef CONFIG_MAGIC_SYSRQ |
606 | { | |
607 | .ctl_name = KERN_SYSRQ, | |
608 | .procname = "sysrq", | |
5d6f647f | 609 | .data = &__sysrq_enabled, |
1da177e4 LT |
610 | .maxlen = sizeof (int), |
611 | .mode = 0644, | |
612 | .proc_handler = &proc_dointvec, | |
613 | }, | |
614 | #endif | |
d6f8ff73 | 615 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 616 | { |
1da177e4 | 617 | .procname = "cad_pid", |
9ec52099 | 618 | .data = NULL, |
1da177e4 LT |
619 | .maxlen = sizeof (int), |
620 | .mode = 0600, | |
9ec52099 | 621 | .proc_handler = &proc_do_cad_pid, |
1da177e4 | 622 | }, |
d6f8ff73 | 623 | #endif |
1da177e4 LT |
624 | { |
625 | .ctl_name = KERN_MAX_THREADS, | |
626 | .procname = "threads-max", | |
627 | .data = &max_threads, | |
628 | .maxlen = sizeof(int), | |
629 | .mode = 0644, | |
630 | .proc_handler = &proc_dointvec, | |
631 | }, | |
632 | { | |
633 | .ctl_name = KERN_RANDOM, | |
634 | .procname = "random", | |
635 | .mode = 0555, | |
636 | .child = random_table, | |
637 | }, | |
1da177e4 LT |
638 | { |
639 | .ctl_name = KERN_OVERFLOWUID, | |
640 | .procname = "overflowuid", | |
641 | .data = &overflowuid, | |
642 | .maxlen = sizeof(int), | |
643 | .mode = 0644, | |
644 | .proc_handler = &proc_dointvec_minmax, | |
645 | .strategy = &sysctl_intvec, | |
646 | .extra1 = &minolduid, | |
647 | .extra2 = &maxolduid, | |
648 | }, | |
649 | { | |
650 | .ctl_name = KERN_OVERFLOWGID, | |
651 | .procname = "overflowgid", | |
652 | .data = &overflowgid, | |
653 | .maxlen = sizeof(int), | |
654 | .mode = 0644, | |
655 | .proc_handler = &proc_dointvec_minmax, | |
656 | .strategy = &sysctl_intvec, | |
657 | .extra1 = &minolduid, | |
658 | .extra2 = &maxolduid, | |
659 | }, | |
347a8dc3 | 660 | #ifdef CONFIG_S390 |
1da177e4 LT |
661 | #ifdef CONFIG_MATHEMU |
662 | { | |
663 | .ctl_name = KERN_IEEE_EMULATION_WARNINGS, | |
664 | .procname = "ieee_emulation_warnings", | |
665 | .data = &sysctl_ieee_emulation_warnings, | |
666 | .maxlen = sizeof(int), | |
667 | .mode = 0644, | |
668 | .proc_handler = &proc_dointvec, | |
669 | }, | |
1da177e4 LT |
670 | #endif |
671 | { | |
672 | .ctl_name = KERN_S390_USER_DEBUG_LOGGING, | |
673 | .procname = "userprocess_debug", | |
674 | .data = &sysctl_userprocess_debug, | |
675 | .maxlen = sizeof(int), | |
676 | .mode = 0644, | |
677 | .proc_handler = &proc_dointvec, | |
678 | }, | |
679 | #endif | |
680 | { | |
681 | .ctl_name = KERN_PIDMAX, | |
682 | .procname = "pid_max", | |
683 | .data = &pid_max, | |
684 | .maxlen = sizeof (int), | |
685 | .mode = 0644, | |
686 | .proc_handler = &proc_dointvec_minmax, | |
687 | .strategy = sysctl_intvec, | |
688 | .extra1 = &pid_max_min, | |
689 | .extra2 = &pid_max_max, | |
690 | }, | |
691 | { | |
692 | .ctl_name = KERN_PANIC_ON_OOPS, | |
693 | .procname = "panic_on_oops", | |
694 | .data = &panic_on_oops, | |
695 | .maxlen = sizeof(int), | |
696 | .mode = 0644, | |
697 | .proc_handler = &proc_dointvec, | |
698 | }, | |
7ef3d2fd JP |
699 | #if defined CONFIG_PRINTK |
700 | { | |
701 | .ctl_name = KERN_PRINTK, | |
702 | .procname = "printk", | |
703 | .data = &console_loglevel, | |
704 | .maxlen = 4*sizeof(int), | |
705 | .mode = 0644, | |
706 | .proc_handler = &proc_dointvec, | |
707 | }, | |
1da177e4 LT |
708 | { |
709 | .ctl_name = KERN_PRINTK_RATELIMIT, | |
710 | .procname = "printk_ratelimit", | |
717115e1 | 711 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
712 | .maxlen = sizeof(int), |
713 | .mode = 0644, | |
714 | .proc_handler = &proc_dointvec_jiffies, | |
715 | .strategy = &sysctl_jiffies, | |
716 | }, | |
717 | { | |
718 | .ctl_name = KERN_PRINTK_RATELIMIT_BURST, | |
719 | .procname = "printk_ratelimit_burst", | |
717115e1 | 720 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
721 | .maxlen = sizeof(int), |
722 | .mode = 0644, | |
723 | .proc_handler = &proc_dointvec, | |
724 | }, | |
7ef3d2fd | 725 | #endif |
1da177e4 LT |
726 | { |
727 | .ctl_name = KERN_NGROUPS_MAX, | |
728 | .procname = "ngroups_max", | |
729 | .data = &ngroups_max, | |
730 | .maxlen = sizeof (int), | |
731 | .mode = 0444, | |
732 | .proc_handler = &proc_dointvec, | |
733 | }, | |
734 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
735 | { | |
736 | .ctl_name = KERN_UNKNOWN_NMI_PANIC, | |
737 | .procname = "unknown_nmi_panic", | |
738 | .data = &unknown_nmi_panic, | |
739 | .maxlen = sizeof (int), | |
740 | .mode = 0644, | |
2fbe7b25 | 741 | .proc_handler = &proc_dointvec, |
1da177e4 | 742 | }, |
407984f1 | 743 | { |
407984f1 DZ |
744 | .procname = "nmi_watchdog", |
745 | .data = &nmi_watchdog_enabled, | |
746 | .maxlen = sizeof (int), | |
747 | .mode = 0644, | |
748 | .proc_handler = &proc_nmi_enabled, | |
1da177e4 LT |
749 | }, |
750 | #endif | |
751 | #if defined(CONFIG_X86) | |
8da5adda DZ |
752 | { |
753 | .ctl_name = KERN_PANIC_ON_NMI, | |
754 | .procname = "panic_on_unrecovered_nmi", | |
755 | .data = &panic_on_unrecovered_nmi, | |
756 | .maxlen = sizeof(int), | |
757 | .mode = 0644, | |
758 | .proc_handler = &proc_dointvec, | |
759 | }, | |
5211a242 KG |
760 | { |
761 | .ctl_name = CTL_UNNUMBERED, | |
762 | .procname = "panic_on_io_nmi", | |
763 | .data = &panic_on_io_nmi, | |
764 | .maxlen = sizeof(int), | |
765 | .mode = 0644, | |
766 | .proc_handler = &proc_dointvec, | |
767 | }, | |
1da177e4 LT |
768 | { |
769 | .ctl_name = KERN_BOOTLOADER_TYPE, | |
770 | .procname = "bootloader_type", | |
771 | .data = &bootloader_type, | |
772 | .maxlen = sizeof (int), | |
773 | .mode = 0444, | |
774 | .proc_handler = &proc_dointvec, | |
775 | }, | |
5031296c PA |
776 | { |
777 | .ctl_name = CTL_UNNUMBERED, | |
778 | .procname = "bootloader_version", | |
779 | .data = &bootloader_version, | |
780 | .maxlen = sizeof (int), | |
781 | .mode = 0444, | |
782 | .proc_handler = &proc_dointvec, | |
783 | }, | |
0741f4d2 CE |
784 | { |
785 | .ctl_name = CTL_UNNUMBERED, | |
786 | .procname = "kstack_depth_to_print", | |
787 | .data = &kstack_depth_to_print, | |
788 | .maxlen = sizeof(int), | |
789 | .mode = 0644, | |
790 | .proc_handler = &proc_dointvec, | |
791 | }, | |
6e7c4025 IM |
792 | { |
793 | .ctl_name = CTL_UNNUMBERED, | |
794 | .procname = "io_delay_type", | |
795 | .data = &io_delay_type, | |
796 | .maxlen = sizeof(int), | |
797 | .mode = 0644, | |
798 | .proc_handler = &proc_dointvec, | |
799 | }, | |
1da177e4 | 800 | #endif |
7a9166e3 | 801 | #if defined(CONFIG_MMU) |
1da177e4 LT |
802 | { |
803 | .ctl_name = KERN_RANDOMIZE, | |
804 | .procname = "randomize_va_space", | |
805 | .data = &randomize_va_space, | |
806 | .maxlen = sizeof(int), | |
807 | .mode = 0644, | |
808 | .proc_handler = &proc_dointvec, | |
809 | }, | |
7a9166e3 | 810 | #endif |
0152fb37 | 811 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 MS |
812 | { |
813 | .ctl_name = KERN_SPIN_RETRY, | |
814 | .procname = "spin_retry", | |
815 | .data = &spin_retry, | |
816 | .maxlen = sizeof (int), | |
817 | .mode = 0644, | |
818 | .proc_handler = &proc_dointvec, | |
819 | }, | |
c255d844 | 820 | #endif |
673d5b43 | 821 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 822 | { |
c255d844 | 823 | .procname = "acpi_video_flags", |
77afcf78 | 824 | .data = &acpi_realmode_flags, |
c255d844 PM |
825 | .maxlen = sizeof (unsigned long), |
826 | .mode = 0644, | |
7f99f06f | 827 | .proc_handler = &proc_doulongvec_minmax, |
c255d844 | 828 | }, |
d2b176ed JS |
829 | #endif |
830 | #ifdef CONFIG_IA64 | |
831 | { | |
832 | .ctl_name = KERN_IA64_UNALIGNED, | |
833 | .procname = "ignore-unaligned-usertrap", | |
834 | .data = &no_unaligned_warning, | |
835 | .maxlen = sizeof (int), | |
836 | .mode = 0644, | |
837 | .proc_handler = &proc_dointvec, | |
838 | }, | |
88fc241f DC |
839 | { |
840 | .ctl_name = CTL_UNNUMBERED, | |
841 | .procname = "unaligned-dump-stack", | |
842 | .data = &unaligned_dump_stack, | |
843 | .maxlen = sizeof (int), | |
844 | .mode = 0644, | |
845 | .proc_handler = &proc_dointvec, | |
846 | }, | |
bebfa101 | 847 | #endif |
c4f3b63f | 848 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
9c44bc03 IM |
849 | { |
850 | .ctl_name = CTL_UNNUMBERED, | |
851 | .procname = "softlockup_panic", | |
852 | .data = &softlockup_panic, | |
853 | .maxlen = sizeof(int), | |
854 | .mode = 0644, | |
4dca10a9 | 855 | .proc_handler = &proc_dointvec_minmax, |
9c44bc03 IM |
856 | .strategy = &sysctl_intvec, |
857 | .extra1 = &zero, | |
858 | .extra2 = &one, | |
859 | }, | |
c4f3b63f RT |
860 | { |
861 | .ctl_name = CTL_UNNUMBERED, | |
862 | .procname = "softlockup_thresh", | |
863 | .data = &softlockup_thresh, | |
9383d967 | 864 | .maxlen = sizeof(int), |
c4f3b63f | 865 | .mode = 0644, |
baf48f65 | 866 | .proc_handler = &proc_dosoftlockup_thresh, |
c4f3b63f | 867 | .strategy = &sysctl_intvec, |
9383d967 | 868 | .extra1 = &neg_one, |
c4f3b63f RT |
869 | .extra2 = &sixty, |
870 | }, | |
e162b39a MSB |
871 | #endif |
872 | #ifdef CONFIG_DETECT_HUNG_TASK | |
873 | { | |
874 | .ctl_name = CTL_UNNUMBERED, | |
875 | .procname = "hung_task_panic", | |
876 | .data = &sysctl_hung_task_panic, | |
877 | .maxlen = sizeof(int), | |
878 | .mode = 0644, | |
879 | .proc_handler = &proc_dointvec_minmax, | |
880 | .strategy = &sysctl_intvec, | |
881 | .extra1 = &zero, | |
882 | .extra2 = &one, | |
883 | }, | |
82a1fcb9 IM |
884 | { |
885 | .ctl_name = CTL_UNNUMBERED, | |
886 | .procname = "hung_task_check_count", | |
887 | .data = &sysctl_hung_task_check_count, | |
90739081 | 888 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 889 | .mode = 0644, |
90739081 | 890 | .proc_handler = &proc_doulongvec_minmax, |
82a1fcb9 IM |
891 | .strategy = &sysctl_intvec, |
892 | }, | |
893 | { | |
894 | .ctl_name = CTL_UNNUMBERED, | |
895 | .procname = "hung_task_timeout_secs", | |
896 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 897 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 898 | .mode = 0644, |
e162b39a | 899 | .proc_handler = &proc_dohung_task_timeout_secs, |
82a1fcb9 IM |
900 | .strategy = &sysctl_intvec, |
901 | }, | |
902 | { | |
903 | .ctl_name = CTL_UNNUMBERED, | |
904 | .procname = "hung_task_warnings", | |
905 | .data = &sysctl_hung_task_warnings, | |
90739081 | 906 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 907 | .mode = 0644, |
90739081 | 908 | .proc_handler = &proc_doulongvec_minmax, |
82a1fcb9 IM |
909 | .strategy = &sysctl_intvec, |
910 | }, | |
c4f3b63f | 911 | #endif |
bebfa101 AK |
912 | #ifdef CONFIG_COMPAT |
913 | { | |
914 | .ctl_name = KERN_COMPAT_LOG, | |
915 | .procname = "compat-log", | |
916 | .data = &compat_log, | |
917 | .maxlen = sizeof (int), | |
918 | .mode = 0644, | |
919 | .proc_handler = &proc_dointvec, | |
920 | }, | |
951f22d5 | 921 | #endif |
23f78d4a IM |
922 | #ifdef CONFIG_RT_MUTEXES |
923 | { | |
924 | .ctl_name = KERN_MAX_LOCK_DEPTH, | |
925 | .procname = "max_lock_depth", | |
926 | .data = &max_lock_depth, | |
927 | .maxlen = sizeof(int), | |
928 | .mode = 0644, | |
929 | .proc_handler = &proc_dointvec, | |
930 | }, | |
5096add8 | 931 | #endif |
10a0a8d4 JF |
932 | { |
933 | .ctl_name = CTL_UNNUMBERED, | |
934 | .procname = "poweroff_cmd", | |
935 | .data = &poweroff_cmd, | |
936 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
937 | .mode = 0644, | |
938 | .proc_handler = &proc_dostring, | |
939 | .strategy = &sysctl_string, | |
940 | }, | |
0b77f5bf DH |
941 | #ifdef CONFIG_KEYS |
942 | { | |
943 | .ctl_name = CTL_UNNUMBERED, | |
944 | .procname = "keys", | |
945 | .mode = 0555, | |
946 | .child = key_sysctls, | |
947 | }, | |
948 | #endif | |
31a72bce PM |
949 | #ifdef CONFIG_RCU_TORTURE_TEST |
950 | { | |
951 | .ctl_name = CTL_UNNUMBERED, | |
952 | .procname = "rcutorture_runnable", | |
953 | .data = &rcutorture_runnable, | |
954 | .maxlen = sizeof(int), | |
955 | .mode = 0644, | |
956 | .proc_handler = &proc_dointvec, | |
957 | }, | |
958 | #endif | |
12e22c5e DH |
959 | #ifdef CONFIG_SLOW_WORK |
960 | { | |
961 | .ctl_name = CTL_UNNUMBERED, | |
962 | .procname = "slow-work", | |
963 | .mode = 0555, | |
964 | .child = slow_work_sysctls, | |
965 | }, | |
966 | #endif | |
1ccd1549 PZ |
967 | #ifdef CONFIG_PERF_COUNTERS |
968 | { | |
969 | .ctl_name = CTL_UNNUMBERED, | |
0764771d PZ |
970 | .procname = "perf_counter_paranoid", |
971 | .data = &sysctl_perf_counter_paranoid, | |
972 | .maxlen = sizeof(sysctl_perf_counter_paranoid), | |
1ccd1549 PZ |
973 | .mode = 0644, |
974 | .proc_handler = &proc_dointvec, | |
975 | }, | |
c5078f78 PZ |
976 | { |
977 | .ctl_name = CTL_UNNUMBERED, | |
978 | .procname = "perf_counter_mlock_kb", | |
979 | .data = &sysctl_perf_counter_mlock, | |
980 | .maxlen = sizeof(sysctl_perf_counter_mlock), | |
981 | .mode = 0644, | |
982 | .proc_handler = &proc_dointvec, | |
983 | }, | |
a78ac325 PZ |
984 | { |
985 | .ctl_name = CTL_UNNUMBERED, | |
df58ab24 PZ |
986 | .procname = "perf_counter_max_sample_rate", |
987 | .data = &sysctl_perf_counter_sample_rate, | |
988 | .maxlen = sizeof(sysctl_perf_counter_sample_rate), | |
a78ac325 PZ |
989 | .mode = 0644, |
990 | .proc_handler = &proc_dointvec, | |
991 | }, | |
1ccd1549 | 992 | #endif |
dfec072e VN |
993 | #ifdef CONFIG_KMEMCHECK |
994 | { | |
995 | .ctl_name = CTL_UNNUMBERED, | |
996 | .procname = "kmemcheck", | |
997 | .data = &kmemcheck_enabled, | |
998 | .maxlen = sizeof(int), | |
999 | .mode = 0644, | |
1000 | .proc_handler = &proc_dointvec, | |
1001 | }, | |
1002 | #endif | |
cb684b5b | 1003 | #ifdef CONFIG_BLOCK |
5e605b64 JA |
1004 | { |
1005 | .ctl_name = CTL_UNNUMBERED, | |
1006 | .procname = "blk_iopoll", | |
1007 | .data = &blk_iopoll_enabled, | |
1008 | .maxlen = sizeof(int), | |
1009 | .mode = 0644, | |
1010 | .proc_handler = &proc_dointvec, | |
1011 | }, | |
cb684b5b | 1012 | #endif |
ed2c12f3 AM |
1013 | /* |
1014 | * NOTE: do not add new entries to this table unless you have read | |
1015 | * Documentation/sysctl/ctl_unnumbered.txt | |
1016 | */ | |
1da177e4 LT |
1017 | { .ctl_name = 0 } |
1018 | }; | |
1019 | ||
d8217f07 | 1020 | static struct ctl_table vm_table[] = { |
1da177e4 LT |
1021 | { |
1022 | .ctl_name = VM_OVERCOMMIT_MEMORY, | |
1023 | .procname = "overcommit_memory", | |
1024 | .data = &sysctl_overcommit_memory, | |
1025 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1026 | .mode = 0644, | |
1027 | .proc_handler = &proc_dointvec, | |
1028 | }, | |
fadd8fbd KH |
1029 | { |
1030 | .ctl_name = VM_PANIC_ON_OOM, | |
1031 | .procname = "panic_on_oom", | |
1032 | .data = &sysctl_panic_on_oom, | |
1033 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1034 | .mode = 0644, | |
1035 | .proc_handler = &proc_dointvec, | |
1036 | }, | |
fe071d7e DR |
1037 | { |
1038 | .ctl_name = CTL_UNNUMBERED, | |
1039 | .procname = "oom_kill_allocating_task", | |
1040 | .data = &sysctl_oom_kill_allocating_task, | |
1041 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1042 | .mode = 0644, | |
1043 | .proc_handler = &proc_dointvec, | |
1044 | }, | |
fef1bdd6 DR |
1045 | { |
1046 | .ctl_name = CTL_UNNUMBERED, | |
1047 | .procname = "oom_dump_tasks", | |
1048 | .data = &sysctl_oom_dump_tasks, | |
1049 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1050 | .mode = 0644, | |
1051 | .proc_handler = &proc_dointvec, | |
1052 | }, | |
1da177e4 LT |
1053 | { |
1054 | .ctl_name = VM_OVERCOMMIT_RATIO, | |
1055 | .procname = "overcommit_ratio", | |
1056 | .data = &sysctl_overcommit_ratio, | |
1057 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1058 | .mode = 0644, | |
1059 | .proc_handler = &proc_dointvec, | |
1060 | }, | |
1061 | { | |
1062 | .ctl_name = VM_PAGE_CLUSTER, | |
1063 | .procname = "page-cluster", | |
1064 | .data = &page_cluster, | |
1065 | .maxlen = sizeof(int), | |
1066 | .mode = 0644, | |
1067 | .proc_handler = &proc_dointvec, | |
1068 | }, | |
1069 | { | |
1070 | .ctl_name = VM_DIRTY_BACKGROUND, | |
1071 | .procname = "dirty_background_ratio", | |
1072 | .data = &dirty_background_ratio, | |
1073 | .maxlen = sizeof(dirty_background_ratio), | |
1074 | .mode = 0644, | |
2da02997 | 1075 | .proc_handler = &dirty_background_ratio_handler, |
1da177e4 LT |
1076 | .strategy = &sysctl_intvec, |
1077 | .extra1 = &zero, | |
1078 | .extra2 = &one_hundred, | |
1079 | }, | |
2da02997 DR |
1080 | { |
1081 | .ctl_name = CTL_UNNUMBERED, | |
1082 | .procname = "dirty_background_bytes", | |
1083 | .data = &dirty_background_bytes, | |
1084 | .maxlen = sizeof(dirty_background_bytes), | |
1085 | .mode = 0644, | |
1086 | .proc_handler = &dirty_background_bytes_handler, | |
1087 | .strategy = &sysctl_intvec, | |
fc3501d4 | 1088 | .extra1 = &one_ul, |
2da02997 | 1089 | }, |
1da177e4 LT |
1090 | { |
1091 | .ctl_name = VM_DIRTY_RATIO, | |
1092 | .procname = "dirty_ratio", | |
1093 | .data = &vm_dirty_ratio, | |
1094 | .maxlen = sizeof(vm_dirty_ratio), | |
1095 | .mode = 0644, | |
04fbfdc1 | 1096 | .proc_handler = &dirty_ratio_handler, |
1da177e4 LT |
1097 | .strategy = &sysctl_intvec, |
1098 | .extra1 = &zero, | |
1099 | .extra2 = &one_hundred, | |
1100 | }, | |
2da02997 DR |
1101 | { |
1102 | .ctl_name = CTL_UNNUMBERED, | |
1103 | .procname = "dirty_bytes", | |
1104 | .data = &vm_dirty_bytes, | |
1105 | .maxlen = sizeof(vm_dirty_bytes), | |
1106 | .mode = 0644, | |
1107 | .proc_handler = &dirty_bytes_handler, | |
1108 | .strategy = &sysctl_intvec, | |
9e4a5bda | 1109 | .extra1 = &dirty_bytes_min, |
2da02997 | 1110 | }, |
1da177e4 | 1111 | { |
1da177e4 | 1112 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1113 | .data = &dirty_writeback_interval, |
1114 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 LT |
1115 | .mode = 0644, |
1116 | .proc_handler = &dirty_writeback_centisecs_handler, | |
1117 | }, | |
1118 | { | |
1da177e4 | 1119 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1120 | .data = &dirty_expire_interval, |
1121 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1122 | .mode = 0644, |
704503d8 | 1123 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
1124 | }, |
1125 | { | |
1126 | .ctl_name = VM_NR_PDFLUSH_THREADS, | |
1127 | .procname = "nr_pdflush_threads", | |
1128 | .data = &nr_pdflush_threads, | |
1129 | .maxlen = sizeof nr_pdflush_threads, | |
1130 | .mode = 0444 /* read-only*/, | |
1131 | .proc_handler = &proc_dointvec, | |
1132 | }, | |
1133 | { | |
1134 | .ctl_name = VM_SWAPPINESS, | |
1135 | .procname = "swappiness", | |
1136 | .data = &vm_swappiness, | |
1137 | .maxlen = sizeof(vm_swappiness), | |
1138 | .mode = 0644, | |
1139 | .proc_handler = &proc_dointvec_minmax, | |
1140 | .strategy = &sysctl_intvec, | |
1141 | .extra1 = &zero, | |
1142 | .extra2 = &one_hundred, | |
1143 | }, | |
1144 | #ifdef CONFIG_HUGETLB_PAGE | |
1145 | { | |
1da177e4 | 1146 | .procname = "nr_hugepages", |
e5ff2159 | 1147 | .data = NULL, |
1da177e4 LT |
1148 | .maxlen = sizeof(unsigned long), |
1149 | .mode = 0644, | |
1150 | .proc_handler = &hugetlb_sysctl_handler, | |
1151 | .extra1 = (void *)&hugetlb_zero, | |
1152 | .extra2 = (void *)&hugetlb_infinity, | |
1153 | }, | |
1154 | { | |
1155 | .ctl_name = VM_HUGETLB_GROUP, | |
1156 | .procname = "hugetlb_shm_group", | |
1157 | .data = &sysctl_hugetlb_shm_group, | |
1158 | .maxlen = sizeof(gid_t), | |
1159 | .mode = 0644, | |
1160 | .proc_handler = &proc_dointvec, | |
1161 | }, | |
396faf03 MG |
1162 | { |
1163 | .ctl_name = CTL_UNNUMBERED, | |
1164 | .procname = "hugepages_treat_as_movable", | |
1165 | .data = &hugepages_treat_as_movable, | |
1166 | .maxlen = sizeof(int), | |
1167 | .mode = 0644, | |
1168 | .proc_handler = &hugetlb_treat_movable_handler, | |
1169 | }, | |
d1c3fb1f NA |
1170 | { |
1171 | .ctl_name = CTL_UNNUMBERED, | |
1172 | .procname = "nr_overcommit_hugepages", | |
e5ff2159 AK |
1173 | .data = NULL, |
1174 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1175 | .mode = 0644, |
a3d0c6aa | 1176 | .proc_handler = &hugetlb_overcommit_handler, |
e5ff2159 AK |
1177 | .extra1 = (void *)&hugetlb_zero, |
1178 | .extra2 = (void *)&hugetlb_infinity, | |
d1c3fb1f | 1179 | }, |
1da177e4 LT |
1180 | #endif |
1181 | { | |
1182 | .ctl_name = VM_LOWMEM_RESERVE_RATIO, | |
1183 | .procname = "lowmem_reserve_ratio", | |
1184 | .data = &sysctl_lowmem_reserve_ratio, | |
1185 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1186 | .mode = 0644, | |
1187 | .proc_handler = &lowmem_reserve_ratio_sysctl_handler, | |
1188 | .strategy = &sysctl_intvec, | |
1189 | }, | |
9d0243bc AM |
1190 | { |
1191 | .ctl_name = VM_DROP_PAGECACHE, | |
1192 | .procname = "drop_caches", | |
1193 | .data = &sysctl_drop_caches, | |
1194 | .maxlen = sizeof(int), | |
1195 | .mode = 0644, | |
1196 | .proc_handler = drop_caches_sysctl_handler, | |
1197 | .strategy = &sysctl_intvec, | |
1198 | }, | |
1da177e4 LT |
1199 | { |
1200 | .ctl_name = VM_MIN_FREE_KBYTES, | |
1201 | .procname = "min_free_kbytes", | |
1202 | .data = &min_free_kbytes, | |
1203 | .maxlen = sizeof(min_free_kbytes), | |
1204 | .mode = 0644, | |
1205 | .proc_handler = &min_free_kbytes_sysctl_handler, | |
1206 | .strategy = &sysctl_intvec, | |
1207 | .extra1 = &zero, | |
1208 | }, | |
8ad4b1fb RS |
1209 | { |
1210 | .ctl_name = VM_PERCPU_PAGELIST_FRACTION, | |
1211 | .procname = "percpu_pagelist_fraction", | |
1212 | .data = &percpu_pagelist_fraction, | |
1213 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1214 | .mode = 0644, | |
1215 | .proc_handler = &percpu_pagelist_fraction_sysctl_handler, | |
1216 | .strategy = &sysctl_intvec, | |
1217 | .extra1 = &min_percpu_pagelist_fract, | |
1218 | }, | |
1da177e4 LT |
1219 | #ifdef CONFIG_MMU |
1220 | { | |
1221 | .ctl_name = VM_MAX_MAP_COUNT, | |
1222 | .procname = "max_map_count", | |
1223 | .data = &sysctl_max_map_count, | |
1224 | .maxlen = sizeof(sysctl_max_map_count), | |
1225 | .mode = 0644, | |
1226 | .proc_handler = &proc_dointvec | |
1227 | }, | |
dd8632a1 PM |
1228 | #else |
1229 | { | |
1230 | .ctl_name = CTL_UNNUMBERED, | |
1231 | .procname = "nr_trim_pages", | |
1232 | .data = &sysctl_nr_trim_pages, | |
1233 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1234 | .mode = 0644, | |
1235 | .proc_handler = &proc_dointvec_minmax, | |
1236 | .strategy = &sysctl_intvec, | |
1237 | .extra1 = &zero, | |
1238 | }, | |
1da177e4 LT |
1239 | #endif |
1240 | { | |
1241 | .ctl_name = VM_LAPTOP_MODE, | |
1242 | .procname = "laptop_mode", | |
1243 | .data = &laptop_mode, | |
1244 | .maxlen = sizeof(laptop_mode), | |
1245 | .mode = 0644, | |
ed5b43f1 BS |
1246 | .proc_handler = &proc_dointvec_jiffies, |
1247 | .strategy = &sysctl_jiffies, | |
1da177e4 LT |
1248 | }, |
1249 | { | |
1250 | .ctl_name = VM_BLOCK_DUMP, | |
1251 | .procname = "block_dump", | |
1252 | .data = &block_dump, | |
1253 | .maxlen = sizeof(block_dump), | |
1254 | .mode = 0644, | |
1255 | .proc_handler = &proc_dointvec, | |
1256 | .strategy = &sysctl_intvec, | |
1257 | .extra1 = &zero, | |
1258 | }, | |
1259 | { | |
1260 | .ctl_name = VM_VFS_CACHE_PRESSURE, | |
1261 | .procname = "vfs_cache_pressure", | |
1262 | .data = &sysctl_vfs_cache_pressure, | |
1263 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1264 | .mode = 0644, | |
1265 | .proc_handler = &proc_dointvec, | |
1266 | .strategy = &sysctl_intvec, | |
1267 | .extra1 = &zero, | |
1268 | }, | |
1269 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1270 | { | |
1271 | .ctl_name = VM_LEGACY_VA_LAYOUT, | |
1272 | .procname = "legacy_va_layout", | |
1273 | .data = &sysctl_legacy_va_layout, | |
1274 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1275 | .mode = 0644, | |
1276 | .proc_handler = &proc_dointvec, | |
1277 | .strategy = &sysctl_intvec, | |
1278 | .extra1 = &zero, | |
1279 | }, | |
1280 | #endif | |
1743660b CL |
1281 | #ifdef CONFIG_NUMA |
1282 | { | |
1283 | .ctl_name = VM_ZONE_RECLAIM_MODE, | |
1284 | .procname = "zone_reclaim_mode", | |
1285 | .data = &zone_reclaim_mode, | |
1286 | .maxlen = sizeof(zone_reclaim_mode), | |
1287 | .mode = 0644, | |
1288 | .proc_handler = &proc_dointvec, | |
c84db23c CL |
1289 | .strategy = &sysctl_intvec, |
1290 | .extra1 = &zero, | |
1743660b | 1291 | }, |
9614634f CL |
1292 | { |
1293 | .ctl_name = VM_MIN_UNMAPPED, | |
1294 | .procname = "min_unmapped_ratio", | |
1295 | .data = &sysctl_min_unmapped_ratio, | |
1296 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1297 | .mode = 0644, | |
1298 | .proc_handler = &sysctl_min_unmapped_ratio_sysctl_handler, | |
1299 | .strategy = &sysctl_intvec, | |
1300 | .extra1 = &zero, | |
1301 | .extra2 = &one_hundred, | |
1302 | }, | |
0ff38490 CL |
1303 | { |
1304 | .ctl_name = VM_MIN_SLAB, | |
1305 | .procname = "min_slab_ratio", | |
1306 | .data = &sysctl_min_slab_ratio, | |
1307 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1308 | .mode = 0644, | |
1309 | .proc_handler = &sysctl_min_slab_ratio_sysctl_handler, | |
1310 | .strategy = &sysctl_intvec, | |
1311 | .extra1 = &zero, | |
1312 | .extra2 = &one_hundred, | |
1313 | }, | |
e6e5494c | 1314 | #endif |
77461ab3 CL |
1315 | #ifdef CONFIG_SMP |
1316 | { | |
1317 | .ctl_name = CTL_UNNUMBERED, | |
1318 | .procname = "stat_interval", | |
1319 | .data = &sysctl_stat_interval, | |
1320 | .maxlen = sizeof(sysctl_stat_interval), | |
1321 | .mode = 0644, | |
1322 | .proc_handler = &proc_dointvec_jiffies, | |
1323 | .strategy = &sysctl_jiffies, | |
1324 | }, | |
1325 | #endif | |
ed032189 EP |
1326 | { |
1327 | .ctl_name = CTL_UNNUMBERED, | |
1328 | .procname = "mmap_min_addr", | |
788084ab EP |
1329 | .data = &dac_mmap_min_addr, |
1330 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1331 | .mode = 0644, |
788084ab | 1332 | .proc_handler = &mmap_min_addr_handler, |
ed032189 | 1333 | }, |
f0c0b2b8 KH |
1334 | #ifdef CONFIG_NUMA |
1335 | { | |
1336 | .ctl_name = CTL_UNNUMBERED, | |
1337 | .procname = "numa_zonelist_order", | |
1338 | .data = &numa_zonelist_order, | |
1339 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1340 | .mode = 0644, | |
1341 | .proc_handler = &numa_zonelist_order_handler, | |
1342 | .strategy = &sysctl_string, | |
1343 | }, | |
1344 | #endif | |
2b8232ce | 1345 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1346 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c IM |
1347 | { |
1348 | .ctl_name = VM_VDSO_ENABLED, | |
1349 | .procname = "vdso_enabled", | |
1350 | .data = &vdso_enabled, | |
1351 | .maxlen = sizeof(vdso_enabled), | |
1352 | .mode = 0644, | |
1353 | .proc_handler = &proc_dointvec, | |
1354 | .strategy = &sysctl_intvec, | |
1355 | .extra1 = &zero, | |
1356 | }, | |
1da177e4 | 1357 | #endif |
195cf453 BG |
1358 | #ifdef CONFIG_HIGHMEM |
1359 | { | |
1360 | .ctl_name = CTL_UNNUMBERED, | |
1361 | .procname = "highmem_is_dirtyable", | |
1362 | .data = &vm_highmem_is_dirtyable, | |
1363 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1364 | .mode = 0644, | |
1365 | .proc_handler = &proc_dointvec_minmax, | |
1366 | .strategy = &sysctl_intvec, | |
1367 | .extra1 = &zero, | |
1368 | .extra2 = &one, | |
1369 | }, | |
1370 | #endif | |
4be6f6bb PZ |
1371 | { |
1372 | .ctl_name = CTL_UNNUMBERED, | |
1373 | .procname = "scan_unevictable_pages", | |
1374 | .data = &scan_unevictable_pages, | |
1375 | .maxlen = sizeof(scan_unevictable_pages), | |
1376 | .mode = 0644, | |
1377 | .proc_handler = &scan_unevictable_handler, | |
1378 | }, | |
2be7fe07 AM |
1379 | /* |
1380 | * NOTE: do not add new entries to this table unless you have read | |
1381 | * Documentation/sysctl/ctl_unnumbered.txt | |
1382 | */ | |
1da177e4 LT |
1383 | { .ctl_name = 0 } |
1384 | }; | |
1385 | ||
2abc26fc | 1386 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1387 | static struct ctl_table binfmt_misc_table[] = { |
2abc26fc EB |
1388 | { .ctl_name = 0 } |
1389 | }; | |
1390 | #endif | |
1391 | ||
d8217f07 | 1392 | static struct ctl_table fs_table[] = { |
1da177e4 LT |
1393 | { |
1394 | .ctl_name = FS_NRINODE, | |
1395 | .procname = "inode-nr", | |
1396 | .data = &inodes_stat, | |
1397 | .maxlen = 2*sizeof(int), | |
1398 | .mode = 0444, | |
1399 | .proc_handler = &proc_dointvec, | |
1400 | }, | |
1401 | { | |
1402 | .ctl_name = FS_STATINODE, | |
1403 | .procname = "inode-state", | |
1404 | .data = &inodes_stat, | |
1405 | .maxlen = 7*sizeof(int), | |
1406 | .mode = 0444, | |
1407 | .proc_handler = &proc_dointvec, | |
1408 | }, | |
1409 | { | |
1da177e4 LT |
1410 | .procname = "file-nr", |
1411 | .data = &files_stat, | |
1412 | .maxlen = 3*sizeof(int), | |
1413 | .mode = 0444, | |
529bf6be | 1414 | .proc_handler = &proc_nr_files, |
1da177e4 LT |
1415 | }, |
1416 | { | |
1417 | .ctl_name = FS_MAXFILE, | |
1418 | .procname = "file-max", | |
1419 | .data = &files_stat.max_files, | |
1420 | .maxlen = sizeof(int), | |
1421 | .mode = 0644, | |
1422 | .proc_handler = &proc_dointvec, | |
1423 | }, | |
9cfe015a ED |
1424 | { |
1425 | .ctl_name = CTL_UNNUMBERED, | |
1426 | .procname = "nr_open", | |
1427 | .data = &sysctl_nr_open, | |
1428 | .maxlen = sizeof(int), | |
1429 | .mode = 0644, | |
eceea0b3 AV |
1430 | .proc_handler = &proc_dointvec_minmax, |
1431 | .extra1 = &sysctl_nr_open_min, | |
1432 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1433 | }, |
1da177e4 LT |
1434 | { |
1435 | .ctl_name = FS_DENTRY, | |
1436 | .procname = "dentry-state", | |
1437 | .data = &dentry_stat, | |
1438 | .maxlen = 6*sizeof(int), | |
1439 | .mode = 0444, | |
1440 | .proc_handler = &proc_dointvec, | |
1441 | }, | |
1442 | { | |
1443 | .ctl_name = FS_OVERFLOWUID, | |
1444 | .procname = "overflowuid", | |
1445 | .data = &fs_overflowuid, | |
1446 | .maxlen = sizeof(int), | |
1447 | .mode = 0644, | |
1448 | .proc_handler = &proc_dointvec_minmax, | |
1449 | .strategy = &sysctl_intvec, | |
1450 | .extra1 = &minolduid, | |
1451 | .extra2 = &maxolduid, | |
1452 | }, | |
1453 | { | |
1454 | .ctl_name = FS_OVERFLOWGID, | |
1455 | .procname = "overflowgid", | |
1456 | .data = &fs_overflowgid, | |
1457 | .maxlen = sizeof(int), | |
1458 | .mode = 0644, | |
1459 | .proc_handler = &proc_dointvec_minmax, | |
1460 | .strategy = &sysctl_intvec, | |
1461 | .extra1 = &minolduid, | |
1462 | .extra2 = &maxolduid, | |
1463 | }, | |
bfcd17a6 | 1464 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 LT |
1465 | { |
1466 | .ctl_name = FS_LEASES, | |
1467 | .procname = "leases-enable", | |
1468 | .data = &leases_enable, | |
1469 | .maxlen = sizeof(int), | |
1470 | .mode = 0644, | |
1471 | .proc_handler = &proc_dointvec, | |
1472 | }, | |
bfcd17a6 | 1473 | #endif |
1da177e4 LT |
1474 | #ifdef CONFIG_DNOTIFY |
1475 | { | |
1476 | .ctl_name = FS_DIR_NOTIFY, | |
1477 | .procname = "dir-notify-enable", | |
1478 | .data = &dir_notify_enable, | |
1479 | .maxlen = sizeof(int), | |
1480 | .mode = 0644, | |
1481 | .proc_handler = &proc_dointvec, | |
1482 | }, | |
1483 | #endif | |
1484 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1485 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 LT |
1486 | { |
1487 | .ctl_name = FS_LEASE_TIME, | |
1488 | .procname = "lease-break-time", | |
1489 | .data = &lease_break_time, | |
1490 | .maxlen = sizeof(int), | |
1491 | .mode = 0644, | |
8e654fba | 1492 | .proc_handler = &proc_dointvec, |
1da177e4 | 1493 | }, |
bfcd17a6 | 1494 | #endif |
ebf3f09c | 1495 | #ifdef CONFIG_AIO |
1da177e4 | 1496 | { |
1da177e4 LT |
1497 | .procname = "aio-nr", |
1498 | .data = &aio_nr, | |
1499 | .maxlen = sizeof(aio_nr), | |
1500 | .mode = 0444, | |
d55b5fda | 1501 | .proc_handler = &proc_doulongvec_minmax, |
1da177e4 LT |
1502 | }, |
1503 | { | |
1da177e4 LT |
1504 | .procname = "aio-max-nr", |
1505 | .data = &aio_max_nr, | |
1506 | .maxlen = sizeof(aio_max_nr), | |
1507 | .mode = 0644, | |
d55b5fda | 1508 | .proc_handler = &proc_doulongvec_minmax, |
1da177e4 | 1509 | }, |
ebf3f09c | 1510 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1511 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 RL |
1512 | { |
1513 | .ctl_name = FS_INOTIFY, | |
1514 | .procname = "inotify", | |
1515 | .mode = 0555, | |
1516 | .child = inotify_table, | |
1517 | }, | |
1518 | #endif | |
7ef9964e DL |
1519 | #ifdef CONFIG_EPOLL |
1520 | { | |
1521 | .procname = "epoll", | |
1522 | .mode = 0555, | |
1523 | .child = epoll_table, | |
1524 | }, | |
1525 | #endif | |
1da177e4 | 1526 | #endif |
d6e71144 AC |
1527 | { |
1528 | .ctl_name = KERN_SETUID_DUMPABLE, | |
1529 | .procname = "suid_dumpable", | |
1530 | .data = &suid_dumpable, | |
1531 | .maxlen = sizeof(int), | |
1532 | .mode = 0644, | |
8e654fba MW |
1533 | .proc_handler = &proc_dointvec_minmax, |
1534 | .strategy = &sysctl_intvec, | |
1535 | .extra1 = &zero, | |
1536 | .extra2 = &two, | |
d6e71144 | 1537 | }, |
2abc26fc EB |
1538 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1539 | { | |
1540 | .ctl_name = CTL_UNNUMBERED, | |
1541 | .procname = "binfmt_misc", | |
1542 | .mode = 0555, | |
1543 | .child = binfmt_misc_table, | |
1544 | }, | |
1545 | #endif | |
2be7fe07 AM |
1546 | /* |
1547 | * NOTE: do not add new entries to this table unless you have read | |
1548 | * Documentation/sysctl/ctl_unnumbered.txt | |
2be7fe07 | 1549 | */ |
1da177e4 LT |
1550 | { .ctl_name = 0 } |
1551 | }; | |
1552 | ||
d8217f07 | 1553 | static struct ctl_table debug_table[] = { |
d0c3d534 | 1554 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) |
abd4f750 MAS |
1555 | { |
1556 | .ctl_name = CTL_UNNUMBERED, | |
1557 | .procname = "exception-trace", | |
1558 | .data = &show_unhandled_signals, | |
1559 | .maxlen = sizeof(int), | |
1560 | .mode = 0644, | |
1561 | .proc_handler = proc_dointvec | |
1562 | }, | |
1563 | #endif | |
1da177e4 LT |
1564 | { .ctl_name = 0 } |
1565 | }; | |
1566 | ||
d8217f07 | 1567 | static struct ctl_table dev_table[] = { |
1da177e4 | 1568 | { .ctl_name = 0 } |
0eeca283 | 1569 | }; |
1da177e4 | 1570 | |
330d57fb AV |
1571 | static DEFINE_SPINLOCK(sysctl_lock); |
1572 | ||
1573 | /* called under sysctl_lock */ | |
1574 | static int use_table(struct ctl_table_header *p) | |
1575 | { | |
1576 | if (unlikely(p->unregistering)) | |
1577 | return 0; | |
1578 | p->used++; | |
1579 | return 1; | |
1580 | } | |
1581 | ||
1582 | /* called under sysctl_lock */ | |
1583 | static void unuse_table(struct ctl_table_header *p) | |
1584 | { | |
1585 | if (!--p->used) | |
1586 | if (unlikely(p->unregistering)) | |
1587 | complete(p->unregistering); | |
1588 | } | |
1589 | ||
1590 | /* called under sysctl_lock, will reacquire if has to wait */ | |
1591 | static void start_unregistering(struct ctl_table_header *p) | |
1592 | { | |
1593 | /* | |
1594 | * if p->used is 0, nobody will ever touch that entry again; | |
1595 | * we'll eliminate all paths to it before dropping sysctl_lock | |
1596 | */ | |
1597 | if (unlikely(p->used)) { | |
1598 | struct completion wait; | |
1599 | init_completion(&wait); | |
1600 | p->unregistering = &wait; | |
1601 | spin_unlock(&sysctl_lock); | |
1602 | wait_for_completion(&wait); | |
1603 | spin_lock(&sysctl_lock); | |
f7e6ced4 AV |
1604 | } else { |
1605 | /* anything non-NULL; we'll never dereference it */ | |
1606 | p->unregistering = ERR_PTR(-EINVAL); | |
330d57fb AV |
1607 | } |
1608 | /* | |
1609 | * do not remove from the list until nobody holds it; walking the | |
1610 | * list in do_sysctl() relies on that. | |
1611 | */ | |
1612 | list_del_init(&p->ctl_entry); | |
1613 | } | |
1614 | ||
f7e6ced4 AV |
1615 | void sysctl_head_get(struct ctl_table_header *head) |
1616 | { | |
1617 | spin_lock(&sysctl_lock); | |
1618 | head->count++; | |
1619 | spin_unlock(&sysctl_lock); | |
1620 | } | |
1621 | ||
1622 | void sysctl_head_put(struct ctl_table_header *head) | |
1623 | { | |
1624 | spin_lock(&sysctl_lock); | |
1625 | if (!--head->count) | |
1626 | kfree(head); | |
1627 | spin_unlock(&sysctl_lock); | |
1628 | } | |
1629 | ||
1630 | struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head) | |
1631 | { | |
1632 | if (!head) | |
1633 | BUG(); | |
1634 | spin_lock(&sysctl_lock); | |
1635 | if (!use_table(head)) | |
1636 | head = ERR_PTR(-ENOENT); | |
1637 | spin_unlock(&sysctl_lock); | |
1638 | return head; | |
1639 | } | |
1640 | ||
805b5d5e EB |
1641 | void sysctl_head_finish(struct ctl_table_header *head) |
1642 | { | |
1643 | if (!head) | |
1644 | return; | |
1645 | spin_lock(&sysctl_lock); | |
1646 | unuse_table(head); | |
1647 | spin_unlock(&sysctl_lock); | |
1648 | } | |
1649 | ||
73455092 AV |
1650 | static struct ctl_table_set * |
1651 | lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces) | |
1652 | { | |
1653 | struct ctl_table_set *set = &root->default_set; | |
1654 | if (root->lookup) | |
1655 | set = root->lookup(root, namespaces); | |
1656 | return set; | |
1657 | } | |
1658 | ||
e51b6ba0 EB |
1659 | static struct list_head * |
1660 | lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces) | |
805b5d5e | 1661 | { |
73455092 AV |
1662 | struct ctl_table_set *set = lookup_header_set(root, namespaces); |
1663 | return &set->list; | |
e51b6ba0 EB |
1664 | } |
1665 | ||
1666 | struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces, | |
1667 | struct ctl_table_header *prev) | |
1668 | { | |
1669 | struct ctl_table_root *root; | |
1670 | struct list_head *header_list; | |
805b5d5e EB |
1671 | struct ctl_table_header *head; |
1672 | struct list_head *tmp; | |
e51b6ba0 | 1673 | |
805b5d5e EB |
1674 | spin_lock(&sysctl_lock); |
1675 | if (prev) { | |
e51b6ba0 | 1676 | head = prev; |
805b5d5e EB |
1677 | tmp = &prev->ctl_entry; |
1678 | unuse_table(prev); | |
1679 | goto next; | |
1680 | } | |
1681 | tmp = &root_table_header.ctl_entry; | |
1682 | for (;;) { | |
1683 | head = list_entry(tmp, struct ctl_table_header, ctl_entry); | |
1684 | ||
1685 | if (!use_table(head)) | |
1686 | goto next; | |
1687 | spin_unlock(&sysctl_lock); | |
1688 | return head; | |
1689 | next: | |
e51b6ba0 | 1690 | root = head->root; |
805b5d5e | 1691 | tmp = tmp->next; |
e51b6ba0 EB |
1692 | header_list = lookup_header_list(root, namespaces); |
1693 | if (tmp != header_list) | |
1694 | continue; | |
1695 | ||
1696 | do { | |
1697 | root = list_entry(root->root_list.next, | |
1698 | struct ctl_table_root, root_list); | |
1699 | if (root == &sysctl_table_root) | |
1700 | goto out; | |
1701 | header_list = lookup_header_list(root, namespaces); | |
1702 | } while (list_empty(header_list)); | |
1703 | tmp = header_list->next; | |
805b5d5e | 1704 | } |
e51b6ba0 | 1705 | out: |
805b5d5e EB |
1706 | spin_unlock(&sysctl_lock); |
1707 | return NULL; | |
1708 | } | |
1709 | ||
e51b6ba0 EB |
1710 | struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev) |
1711 | { | |
1712 | return __sysctl_head_next(current->nsproxy, prev); | |
1713 | } | |
1714 | ||
1715 | void register_sysctl_root(struct ctl_table_root *root) | |
1716 | { | |
1717 | spin_lock(&sysctl_lock); | |
1718 | list_add_tail(&root->root_list, &sysctl_table_root.root_list); | |
1719 | spin_unlock(&sysctl_lock); | |
1720 | } | |
1721 | ||
b89a8171 | 1722 | #ifdef CONFIG_SYSCTL_SYSCALL |
2c4c7155 | 1723 | /* Perform the actual read/write of a sysctl table entry. */ |
d7321cd6 PE |
1724 | static int do_sysctl_strategy(struct ctl_table_root *root, |
1725 | struct ctl_table *table, | |
2c4c7155 PE |
1726 | void __user *oldval, size_t __user *oldlenp, |
1727 | void __user *newval, size_t newlen) | |
1728 | { | |
1729 | int op = 0, rc; | |
1730 | ||
1731 | if (oldval) | |
e6305c43 | 1732 | op |= MAY_READ; |
2c4c7155 | 1733 | if (newval) |
e6305c43 | 1734 | op |= MAY_WRITE; |
d7321cd6 | 1735 | if (sysctl_perm(root, table, op)) |
2c4c7155 PE |
1736 | return -EPERM; |
1737 | ||
1738 | if (table->strategy) { | |
f221e726 | 1739 | rc = table->strategy(table, oldval, oldlenp, newval, newlen); |
2c4c7155 PE |
1740 | if (rc < 0) |
1741 | return rc; | |
1742 | if (rc > 0) | |
1743 | return 0; | |
1744 | } | |
1745 | ||
1746 | /* If there is no strategy routine, or if the strategy returns | |
1747 | * zero, proceed with automatic r/w */ | |
1748 | if (table->data && table->maxlen) { | |
f221e726 | 1749 | rc = sysctl_data(table, oldval, oldlenp, newval, newlen); |
2c4c7155 PE |
1750 | if (rc < 0) |
1751 | return rc; | |
1752 | } | |
1753 | return 0; | |
1754 | } | |
1755 | ||
1756 | static int parse_table(int __user *name, int nlen, | |
1757 | void __user *oldval, size_t __user *oldlenp, | |
1758 | void __user *newval, size_t newlen, | |
d7321cd6 | 1759 | struct ctl_table_root *root, |
2c4c7155 PE |
1760 | struct ctl_table *table) |
1761 | { | |
1762 | int n; | |
1763 | repeat: | |
1764 | if (!nlen) | |
1765 | return -ENOTDIR; | |
1766 | if (get_user(n, name)) | |
1767 | return -EFAULT; | |
1768 | for ( ; table->ctl_name || table->procname; table++) { | |
1769 | if (!table->ctl_name) | |
1770 | continue; | |
1771 | if (n == table->ctl_name) { | |
1772 | int error; | |
1773 | if (table->child) { | |
e6305c43 | 1774 | if (sysctl_perm(root, table, MAY_EXEC)) |
2c4c7155 PE |
1775 | return -EPERM; |
1776 | name++; | |
1777 | nlen--; | |
1778 | table = table->child; | |
1779 | goto repeat; | |
1780 | } | |
f221e726 | 1781 | error = do_sysctl_strategy(root, table, |
2c4c7155 PE |
1782 | oldval, oldlenp, |
1783 | newval, newlen); | |
1784 | return error; | |
1785 | } | |
1786 | } | |
1787 | return -ENOTDIR; | |
1788 | } | |
1789 | ||
1da177e4 LT |
1790 | int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *oldlenp, |
1791 | void __user *newval, size_t newlen) | |
1792 | { | |
805b5d5e | 1793 | struct ctl_table_header *head; |
330d57fb | 1794 | int error = -ENOTDIR; |
1da177e4 LT |
1795 | |
1796 | if (nlen <= 0 || nlen >= CTL_MAXNAME) | |
1797 | return -ENOTDIR; | |
1798 | if (oldval) { | |
1799 | int old_len; | |
1800 | if (!oldlenp || get_user(old_len, oldlenp)) | |
1801 | return -EFAULT; | |
1802 | } | |
330d57fb | 1803 | |
805b5d5e EB |
1804 | for (head = sysctl_head_next(NULL); head; |
1805 | head = sysctl_head_next(head)) { | |
330d57fb | 1806 | error = parse_table(name, nlen, oldval, oldlenp, |
d7321cd6 PE |
1807 | newval, newlen, |
1808 | head->root, head->ctl_table); | |
805b5d5e EB |
1809 | if (error != -ENOTDIR) { |
1810 | sysctl_head_finish(head); | |
330d57fb | 1811 | break; |
805b5d5e EB |
1812 | } |
1813 | } | |
330d57fb | 1814 | return error; |
1da177e4 LT |
1815 | } |
1816 | ||
1e7bfb21 | 1817 | SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args) |
1da177e4 LT |
1818 | { |
1819 | struct __sysctl_args tmp; | |
1820 | int error; | |
1821 | ||
1822 | if (copy_from_user(&tmp, args, sizeof(tmp))) | |
1823 | return -EFAULT; | |
1824 | ||
7058cb02 EB |
1825 | error = deprecated_sysctl_warning(&tmp); |
1826 | if (error) | |
1827 | goto out; | |
1828 | ||
1da177e4 LT |
1829 | lock_kernel(); |
1830 | error = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, tmp.oldlenp, | |
1831 | tmp.newval, tmp.newlen); | |
1832 | unlock_kernel(); | |
7058cb02 | 1833 | out: |
1da177e4 LT |
1834 | return error; |
1835 | } | |
b89a8171 | 1836 | #endif /* CONFIG_SYSCTL_SYSCALL */ |
1da177e4 LT |
1837 | |
1838 | /* | |
1ff007eb | 1839 | * sysctl_perm does NOT grant the superuser all rights automatically, because |
1da177e4 LT |
1840 | * some sysctl variables are readonly even to root. |
1841 | */ | |
1842 | ||
1843 | static int test_perm(int mode, int op) | |
1844 | { | |
76aac0e9 | 1845 | if (!current_euid()) |
1da177e4 LT |
1846 | mode >>= 6; |
1847 | else if (in_egroup_p(0)) | |
1848 | mode >>= 3; | |
e6305c43 | 1849 | if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0) |
1da177e4 LT |
1850 | return 0; |
1851 | return -EACCES; | |
1852 | } | |
1853 | ||
d7321cd6 | 1854 | int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op) |
1da177e4 LT |
1855 | { |
1856 | int error; | |
d7321cd6 PE |
1857 | int mode; |
1858 | ||
e6305c43 | 1859 | error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC)); |
1da177e4 LT |
1860 | if (error) |
1861 | return error; | |
d7321cd6 PE |
1862 | |
1863 | if (root->permissions) | |
1864 | mode = root->permissions(root, current->nsproxy, table); | |
1865 | else | |
1866 | mode = table->mode; | |
1867 | ||
1868 | return test_perm(mode, op); | |
1da177e4 LT |
1869 | } |
1870 | ||
d912b0cc EB |
1871 | static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table) |
1872 | { | |
1873 | for (; table->ctl_name || table->procname; table++) { | |
1874 | table->parent = parent; | |
1875 | if (table->child) | |
1876 | sysctl_set_parent(table, table->child); | |
1877 | } | |
1878 | } | |
1879 | ||
1880 | static __init int sysctl_init(void) | |
1881 | { | |
1882 | sysctl_set_parent(NULL, root_table); | |
88f458e4 HS |
1883 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
1884 | { | |
1885 | int err; | |
1886 | err = sysctl_check_table(current->nsproxy, root_table); | |
1887 | } | |
1888 | #endif | |
d912b0cc EB |
1889 | return 0; |
1890 | } | |
1891 | ||
1892 | core_initcall(sysctl_init); | |
1893 | ||
bfbcf034 AV |
1894 | static struct ctl_table *is_branch_in(struct ctl_table *branch, |
1895 | struct ctl_table *table) | |
ae7edecc AV |
1896 | { |
1897 | struct ctl_table *p; | |
1898 | const char *s = branch->procname; | |
1899 | ||
1900 | /* branch should have named subdirectory as its first element */ | |
1901 | if (!s || !branch->child) | |
bfbcf034 | 1902 | return NULL; |
ae7edecc AV |
1903 | |
1904 | /* ... and nothing else */ | |
1905 | if (branch[1].procname || branch[1].ctl_name) | |
bfbcf034 | 1906 | return NULL; |
ae7edecc AV |
1907 | |
1908 | /* table should contain subdirectory with the same name */ | |
1909 | for (p = table; p->procname || p->ctl_name; p++) { | |
1910 | if (!p->child) | |
1911 | continue; | |
1912 | if (p->procname && strcmp(p->procname, s) == 0) | |
bfbcf034 | 1913 | return p; |
ae7edecc | 1914 | } |
bfbcf034 | 1915 | return NULL; |
ae7edecc AV |
1916 | } |
1917 | ||
1918 | /* see if attaching q to p would be an improvement */ | |
1919 | static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q) | |
1920 | { | |
1921 | struct ctl_table *to = p->ctl_table, *by = q->ctl_table; | |
bfbcf034 | 1922 | struct ctl_table *next; |
ae7edecc AV |
1923 | int is_better = 0; |
1924 | int not_in_parent = !p->attached_by; | |
1925 | ||
bfbcf034 | 1926 | while ((next = is_branch_in(by, to)) != NULL) { |
ae7edecc AV |
1927 | if (by == q->attached_by) |
1928 | is_better = 1; | |
1929 | if (to == p->attached_by) | |
1930 | not_in_parent = 1; | |
1931 | by = by->child; | |
bfbcf034 | 1932 | to = next->child; |
ae7edecc AV |
1933 | } |
1934 | ||
1935 | if (is_better && not_in_parent) { | |
1936 | q->attached_by = by; | |
1937 | q->attached_to = to; | |
1938 | q->parent = p; | |
1939 | } | |
1940 | } | |
1941 | ||
1da177e4 | 1942 | /** |
e51b6ba0 EB |
1943 | * __register_sysctl_paths - register a sysctl hierarchy |
1944 | * @root: List of sysctl headers to register on | |
1945 | * @namespaces: Data to compute which lists of sysctl entries are visible | |
29e796fd | 1946 | * @path: The path to the directory the sysctl table is in. |
1da177e4 | 1947 | * @table: the top-level table structure |
1da177e4 LT |
1948 | * |
1949 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
29e796fd | 1950 | * array. A completely 0 filled entry terminates the table. |
1da177e4 | 1951 | * |
d8217f07 | 1952 | * The members of the &struct ctl_table structure are used as follows: |
1da177e4 LT |
1953 | * |
1954 | * ctl_name - This is the numeric sysctl value used by sysctl(2). The number | |
1955 | * must be unique within that level of sysctl | |
1956 | * | |
1957 | * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not | |
1958 | * enter a sysctl file | |
1959 | * | |
1960 | * data - a pointer to data for use by proc_handler | |
1961 | * | |
1962 | * maxlen - the maximum size in bytes of the data | |
1963 | * | |
1964 | * mode - the file permissions for the /proc/sys file, and for sysctl(2) | |
1965 | * | |
1966 | * child - a pointer to the child sysctl table if this entry is a directory, or | |
1967 | * %NULL. | |
1968 | * | |
1969 | * proc_handler - the text handler routine (described below) | |
1970 | * | |
1971 | * strategy - the strategy routine (described below) | |
1972 | * | |
1973 | * de - for internal use by the sysctl routines | |
1974 | * | |
1975 | * extra1, extra2 - extra pointers usable by the proc handler routines | |
1976 | * | |
1977 | * Leaf nodes in the sysctl tree will be represented by a single file | |
1978 | * under /proc; non-leaf nodes will be represented by directories. | |
1979 | * | |
1980 | * sysctl(2) can automatically manage read and write requests through | |
1981 | * the sysctl table. The data and maxlen fields of the ctl_table | |
1982 | * struct enable minimal validation of the values being written to be | |
1983 | * performed, and the mode field allows minimal authentication. | |
1984 | * | |
1985 | * More sophisticated management can be enabled by the provision of a | |
1986 | * strategy routine with the table entry. This will be called before | |
1987 | * any automatic read or write of the data is performed. | |
1988 | * | |
1989 | * The strategy routine may return | |
1990 | * | |
1991 | * < 0 - Error occurred (error is passed to user process) | |
1992 | * | |
1993 | * 0 - OK - proceed with automatic read or write. | |
1994 | * | |
1995 | * > 0 - OK - read or write has been done by the strategy routine, so | |
1996 | * return immediately. | |
1997 | * | |
1998 | * There must be a proc_handler routine for any terminal nodes | |
1999 | * mirrored under /proc/sys (non-terminals are handled by a built-in | |
2000 | * directory handler). Several default handlers are available to | |
2001 | * cover common cases - | |
2002 | * | |
2003 | * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(), | |
2004 | * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(), | |
2005 | * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax() | |
2006 | * | |
2007 | * It is the handler's job to read the input buffer from user memory | |
2008 | * and process it. The handler should return 0 on success. | |
2009 | * | |
2010 | * This routine returns %NULL on a failure to register, and a pointer | |
2011 | * to the table header on success. | |
2012 | */ | |
e51b6ba0 EB |
2013 | struct ctl_table_header *__register_sysctl_paths( |
2014 | struct ctl_table_root *root, | |
2015 | struct nsproxy *namespaces, | |
2016 | const struct ctl_path *path, struct ctl_table *table) | |
1da177e4 | 2017 | { |
29e796fd EB |
2018 | struct ctl_table_header *header; |
2019 | struct ctl_table *new, **prevp; | |
2020 | unsigned int n, npath; | |
ae7edecc | 2021 | struct ctl_table_set *set; |
29e796fd EB |
2022 | |
2023 | /* Count the path components */ | |
2024 | for (npath = 0; path[npath].ctl_name || path[npath].procname; ++npath) | |
2025 | ; | |
2026 | ||
2027 | /* | |
2028 | * For each path component, allocate a 2-element ctl_table array. | |
2029 | * The first array element will be filled with the sysctl entry | |
2030 | * for this, the second will be the sentinel (ctl_name == 0). | |
2031 | * | |
2032 | * We allocate everything in one go so that we don't have to | |
2033 | * worry about freeing additional memory in unregister_sysctl_table. | |
2034 | */ | |
2035 | header = kzalloc(sizeof(struct ctl_table_header) + | |
2036 | (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL); | |
2037 | if (!header) | |
1da177e4 | 2038 | return NULL; |
29e796fd EB |
2039 | |
2040 | new = (struct ctl_table *) (header + 1); | |
2041 | ||
2042 | /* Now connect the dots */ | |
2043 | prevp = &header->ctl_table; | |
2044 | for (n = 0; n < npath; ++n, ++path) { | |
2045 | /* Copy the procname */ | |
2046 | new->procname = path->procname; | |
2047 | new->ctl_name = path->ctl_name; | |
2048 | new->mode = 0555; | |
2049 | ||
2050 | *prevp = new; | |
2051 | prevp = &new->child; | |
2052 | ||
2053 | new += 2; | |
2054 | } | |
2055 | *prevp = table; | |
23eb06de | 2056 | header->ctl_table_arg = table; |
29e796fd EB |
2057 | |
2058 | INIT_LIST_HEAD(&header->ctl_entry); | |
2059 | header->used = 0; | |
2060 | header->unregistering = NULL; | |
e51b6ba0 | 2061 | header->root = root; |
29e796fd | 2062 | sysctl_set_parent(NULL, header->ctl_table); |
f7e6ced4 | 2063 | header->count = 1; |
88f458e4 | 2064 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
e51b6ba0 | 2065 | if (sysctl_check_table(namespaces, header->ctl_table)) { |
29e796fd | 2066 | kfree(header); |
fc6cd25b EB |
2067 | return NULL; |
2068 | } | |
88f458e4 | 2069 | #endif |
330d57fb | 2070 | spin_lock(&sysctl_lock); |
73455092 | 2071 | header->set = lookup_header_set(root, namespaces); |
ae7edecc AV |
2072 | header->attached_by = header->ctl_table; |
2073 | header->attached_to = root_table; | |
2074 | header->parent = &root_table_header; | |
2075 | for (set = header->set; set; set = set->parent) { | |
2076 | struct ctl_table_header *p; | |
2077 | list_for_each_entry(p, &set->list, ctl_entry) { | |
2078 | if (p->unregistering) | |
2079 | continue; | |
2080 | try_attach(p, header); | |
2081 | } | |
2082 | } | |
2083 | header->parent->count++; | |
73455092 | 2084 | list_add_tail(&header->ctl_entry, &header->set->list); |
330d57fb | 2085 | spin_unlock(&sysctl_lock); |
29e796fd EB |
2086 | |
2087 | return header; | |
2088 | } | |
2089 | ||
e51b6ba0 EB |
2090 | /** |
2091 | * register_sysctl_table_path - register a sysctl table hierarchy | |
2092 | * @path: The path to the directory the sysctl table is in. | |
2093 | * @table: the top-level table structure | |
2094 | * | |
2095 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
2096 | * array. A completely 0 filled entry terminates the table. | |
2097 | * | |
2098 | * See __register_sysctl_paths for more details. | |
2099 | */ | |
2100 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, | |
2101 | struct ctl_table *table) | |
2102 | { | |
2103 | return __register_sysctl_paths(&sysctl_table_root, current->nsproxy, | |
2104 | path, table); | |
2105 | } | |
2106 | ||
29e796fd EB |
2107 | /** |
2108 | * register_sysctl_table - register a sysctl table hierarchy | |
2109 | * @table: the top-level table structure | |
2110 | * | |
2111 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
2112 | * array. A completely 0 filled entry terminates the table. | |
2113 | * | |
2114 | * See register_sysctl_paths for more details. | |
2115 | */ | |
2116 | struct ctl_table_header *register_sysctl_table(struct ctl_table *table) | |
2117 | { | |
2118 | static const struct ctl_path null_path[] = { {} }; | |
2119 | ||
2120 | return register_sysctl_paths(null_path, table); | |
1da177e4 LT |
2121 | } |
2122 | ||
2123 | /** | |
2124 | * unregister_sysctl_table - unregister a sysctl table hierarchy | |
2125 | * @header: the header returned from register_sysctl_table | |
2126 | * | |
2127 | * Unregisters the sysctl table and all children. proc entries may not | |
2128 | * actually be removed until they are no longer used by anyone. | |
2129 | */ | |
2130 | void unregister_sysctl_table(struct ctl_table_header * header) | |
2131 | { | |
330d57fb | 2132 | might_sleep(); |
f1dad166 PE |
2133 | |
2134 | if (header == NULL) | |
2135 | return; | |
2136 | ||
330d57fb AV |
2137 | spin_lock(&sysctl_lock); |
2138 | start_unregistering(header); | |
ae7edecc AV |
2139 | if (!--header->parent->count) { |
2140 | WARN_ON(1); | |
2141 | kfree(header->parent); | |
2142 | } | |
f7e6ced4 AV |
2143 | if (!--header->count) |
2144 | kfree(header); | |
330d57fb | 2145 | spin_unlock(&sysctl_lock); |
1da177e4 LT |
2146 | } |
2147 | ||
9043476f AV |
2148 | int sysctl_is_seen(struct ctl_table_header *p) |
2149 | { | |
2150 | struct ctl_table_set *set = p->set; | |
2151 | int res; | |
2152 | spin_lock(&sysctl_lock); | |
2153 | if (p->unregistering) | |
2154 | res = 0; | |
2155 | else if (!set->is_seen) | |
2156 | res = 1; | |
2157 | else | |
2158 | res = set->is_seen(set); | |
2159 | spin_unlock(&sysctl_lock); | |
2160 | return res; | |
2161 | } | |
2162 | ||
73455092 AV |
2163 | void setup_sysctl_set(struct ctl_table_set *p, |
2164 | struct ctl_table_set *parent, | |
2165 | int (*is_seen)(struct ctl_table_set *)) | |
2166 | { | |
2167 | INIT_LIST_HEAD(&p->list); | |
2168 | p->parent = parent ? parent : &sysctl_table_root.default_set; | |
2169 | p->is_seen = is_seen; | |
2170 | } | |
2171 | ||
b89a8171 | 2172 | #else /* !CONFIG_SYSCTL */ |
d8217f07 | 2173 | struct ctl_table_header *register_sysctl_table(struct ctl_table * table) |
b89a8171 EB |
2174 | { |
2175 | return NULL; | |
2176 | } | |
2177 | ||
29e796fd EB |
2178 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, |
2179 | struct ctl_table *table) | |
2180 | { | |
2181 | return NULL; | |
2182 | } | |
2183 | ||
b89a8171 EB |
2184 | void unregister_sysctl_table(struct ctl_table_header * table) |
2185 | { | |
2186 | } | |
2187 | ||
73455092 AV |
2188 | void setup_sysctl_set(struct ctl_table_set *p, |
2189 | struct ctl_table_set *parent, | |
2190 | int (*is_seen)(struct ctl_table_set *)) | |
2191 | { | |
2192 | } | |
2193 | ||
f7e6ced4 AV |
2194 | void sysctl_head_put(struct ctl_table_header *head) |
2195 | { | |
2196 | } | |
2197 | ||
b89a8171 EB |
2198 | #endif /* CONFIG_SYSCTL */ |
2199 | ||
1da177e4 LT |
2200 | /* |
2201 | * /proc/sys support | |
2202 | */ | |
2203 | ||
b89a8171 | 2204 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 2205 | |
b1ba4ddd AB |
2206 | static int _proc_do_string(void* data, int maxlen, int write, |
2207 | struct file *filp, void __user *buffer, | |
2208 | size_t *lenp, loff_t *ppos) | |
1da177e4 LT |
2209 | { |
2210 | size_t len; | |
2211 | char __user *p; | |
2212 | char c; | |
8d060877 ON |
2213 | |
2214 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
2215 | *lenp = 0; |
2216 | return 0; | |
2217 | } | |
8d060877 | 2218 | |
1da177e4 LT |
2219 | if (write) { |
2220 | len = 0; | |
2221 | p = buffer; | |
2222 | while (len < *lenp) { | |
2223 | if (get_user(c, p++)) | |
2224 | return -EFAULT; | |
2225 | if (c == 0 || c == '\n') | |
2226 | break; | |
2227 | len++; | |
2228 | } | |
f5dd3d6f SV |
2229 | if (len >= maxlen) |
2230 | len = maxlen-1; | |
2231 | if(copy_from_user(data, buffer, len)) | |
1da177e4 | 2232 | return -EFAULT; |
f5dd3d6f | 2233 | ((char *) data)[len] = 0; |
1da177e4 LT |
2234 | *ppos += *lenp; |
2235 | } else { | |
f5dd3d6f SV |
2236 | len = strlen(data); |
2237 | if (len > maxlen) | |
2238 | len = maxlen; | |
8d060877 ON |
2239 | |
2240 | if (*ppos > len) { | |
2241 | *lenp = 0; | |
2242 | return 0; | |
2243 | } | |
2244 | ||
2245 | data += *ppos; | |
2246 | len -= *ppos; | |
2247 | ||
1da177e4 LT |
2248 | if (len > *lenp) |
2249 | len = *lenp; | |
2250 | if (len) | |
f5dd3d6f | 2251 | if(copy_to_user(buffer, data, len)) |
1da177e4 LT |
2252 | return -EFAULT; |
2253 | if (len < *lenp) { | |
2254 | if(put_user('\n', ((char __user *) buffer) + len)) | |
2255 | return -EFAULT; | |
2256 | len++; | |
2257 | } | |
2258 | *lenp = len; | |
2259 | *ppos += len; | |
2260 | } | |
2261 | return 0; | |
2262 | } | |
2263 | ||
f5dd3d6f SV |
2264 | /** |
2265 | * proc_dostring - read a string sysctl | |
2266 | * @table: the sysctl table | |
2267 | * @write: %TRUE if this is a write to the sysctl file | |
2268 | * @filp: the file structure | |
2269 | * @buffer: the user buffer | |
2270 | * @lenp: the size of the user buffer | |
2271 | * @ppos: file position | |
2272 | * | |
2273 | * Reads/writes a string from/to the user buffer. If the kernel | |
2274 | * buffer provided is not large enough to hold the string, the | |
2275 | * string is truncated. The copied string is %NULL-terminated. | |
2276 | * If the string is being read by the user process, it is copied | |
2277 | * and a newline '\n' is added. It is truncated if the buffer is | |
2278 | * not large enough. | |
2279 | * | |
2280 | * Returns 0 on success. | |
2281 | */ | |
d8217f07 | 2282 | int proc_dostring(struct ctl_table *table, int write, struct file *filp, |
f5dd3d6f SV |
2283 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2284 | { | |
2285 | return _proc_do_string(table->data, table->maxlen, write, filp, | |
2286 | buffer, lenp, ppos); | |
2287 | } | |
2288 | ||
1da177e4 LT |
2289 | |
2290 | static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp, | |
2291 | int *valp, | |
2292 | int write, void *data) | |
2293 | { | |
2294 | if (write) { | |
2295 | *valp = *negp ? -*lvalp : *lvalp; | |
2296 | } else { | |
2297 | int val = *valp; | |
2298 | if (val < 0) { | |
2299 | *negp = -1; | |
2300 | *lvalp = (unsigned long)-val; | |
2301 | } else { | |
2302 | *negp = 0; | |
2303 | *lvalp = (unsigned long)val; | |
2304 | } | |
2305 | } | |
2306 | return 0; | |
2307 | } | |
2308 | ||
d8217f07 | 2309 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
fcfbd547 KK |
2310 | int write, struct file *filp, void __user *buffer, |
2311 | size_t *lenp, loff_t *ppos, | |
1da177e4 LT |
2312 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, |
2313 | int write, void *data), | |
2314 | void *data) | |
2315 | { | |
2316 | #define TMPBUFLEN 21 | |
7338f299 | 2317 | int *i, vleft, first = 1, neg; |
1da177e4 LT |
2318 | unsigned long lval; |
2319 | size_t left, len; | |
2320 | ||
2321 | char buf[TMPBUFLEN], *p; | |
2322 | char __user *s = buffer; | |
2323 | ||
fcfbd547 | 2324 | if (!tbl_data || !table->maxlen || !*lenp || |
1da177e4 LT |
2325 | (*ppos && !write)) { |
2326 | *lenp = 0; | |
2327 | return 0; | |
2328 | } | |
2329 | ||
fcfbd547 | 2330 | i = (int *) tbl_data; |
1da177e4 LT |
2331 | vleft = table->maxlen / sizeof(*i); |
2332 | left = *lenp; | |
2333 | ||
2334 | if (!conv) | |
2335 | conv = do_proc_dointvec_conv; | |
2336 | ||
2337 | for (; left && vleft--; i++, first=0) { | |
2338 | if (write) { | |
2339 | while (left) { | |
2340 | char c; | |
2341 | if (get_user(c, s)) | |
2342 | return -EFAULT; | |
2343 | if (!isspace(c)) | |
2344 | break; | |
2345 | left--; | |
2346 | s++; | |
2347 | } | |
2348 | if (!left) | |
2349 | break; | |
2350 | neg = 0; | |
2351 | len = left; | |
2352 | if (len > sizeof(buf) - 1) | |
2353 | len = sizeof(buf) - 1; | |
2354 | if (copy_from_user(buf, s, len)) | |
2355 | return -EFAULT; | |
2356 | buf[len] = 0; | |
2357 | p = buf; | |
2358 | if (*p == '-' && left > 1) { | |
2359 | neg = 1; | |
bd9b0bac | 2360 | p++; |
1da177e4 LT |
2361 | } |
2362 | if (*p < '0' || *p > '9') | |
2363 | break; | |
2364 | ||
2365 | lval = simple_strtoul(p, &p, 0); | |
2366 | ||
2367 | len = p-buf; | |
2368 | if ((len < left) && *p && !isspace(*p)) | |
2369 | break; | |
1da177e4 LT |
2370 | s += len; |
2371 | left -= len; | |
2372 | ||
2373 | if (conv(&neg, &lval, i, 1, data)) | |
2374 | break; | |
2375 | } else { | |
2376 | p = buf; | |
2377 | if (!first) | |
2378 | *p++ = '\t'; | |
2379 | ||
2380 | if (conv(&neg, &lval, i, 0, data)) | |
2381 | break; | |
2382 | ||
2383 | sprintf(p, "%s%lu", neg ? "-" : "", lval); | |
2384 | len = strlen(buf); | |
2385 | if (len > left) | |
2386 | len = left; | |
2387 | if(copy_to_user(s, buf, len)) | |
2388 | return -EFAULT; | |
2389 | left -= len; | |
2390 | s += len; | |
2391 | } | |
2392 | } | |
2393 | ||
2394 | if (!write && !first && left) { | |
2395 | if(put_user('\n', s)) | |
2396 | return -EFAULT; | |
2397 | left--, s++; | |
2398 | } | |
2399 | if (write) { | |
2400 | while (left) { | |
2401 | char c; | |
2402 | if (get_user(c, s++)) | |
2403 | return -EFAULT; | |
2404 | if (!isspace(c)) | |
2405 | break; | |
2406 | left--; | |
2407 | } | |
2408 | } | |
2409 | if (write && first) | |
2410 | return -EINVAL; | |
2411 | *lenp -= left; | |
2412 | *ppos += *lenp; | |
2413 | return 0; | |
2414 | #undef TMPBUFLEN | |
2415 | } | |
2416 | ||
d8217f07 | 2417 | static int do_proc_dointvec(struct ctl_table *table, int write, struct file *filp, |
fcfbd547 KK |
2418 | void __user *buffer, size_t *lenp, loff_t *ppos, |
2419 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, | |
2420 | int write, void *data), | |
2421 | void *data) | |
2422 | { | |
2423 | return __do_proc_dointvec(table->data, table, write, filp, | |
2424 | buffer, lenp, ppos, conv, data); | |
2425 | } | |
2426 | ||
1da177e4 LT |
2427 | /** |
2428 | * proc_dointvec - read a vector of integers | |
2429 | * @table: the sysctl table | |
2430 | * @write: %TRUE if this is a write to the sysctl file | |
2431 | * @filp: the file structure | |
2432 | * @buffer: the user buffer | |
2433 | * @lenp: the size of the user buffer | |
2434 | * @ppos: file position | |
2435 | * | |
2436 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2437 | * values from/to the user buffer, treated as an ASCII string. | |
2438 | * | |
2439 | * Returns 0 on success. | |
2440 | */ | |
d8217f07 | 2441 | int proc_dointvec(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2442 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2443 | { | |
2444 | return do_proc_dointvec(table,write,filp,buffer,lenp,ppos, | |
2445 | NULL,NULL); | |
2446 | } | |
2447 | ||
34f5a398 | 2448 | /* |
25ddbb18 AK |
2449 | * Taint values can only be increased |
2450 | * This means we can safely use a temporary. | |
34f5a398 | 2451 | */ |
25ddbb18 | 2452 | static int proc_taint(struct ctl_table *table, int write, struct file *filp, |
34f5a398 TT |
2453 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2454 | { | |
25ddbb18 AK |
2455 | struct ctl_table t; |
2456 | unsigned long tmptaint = get_taint(); | |
2457 | int err; | |
34f5a398 | 2458 | |
91fcd412 | 2459 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2460 | return -EPERM; |
2461 | ||
25ddbb18 AK |
2462 | t = *table; |
2463 | t.data = &tmptaint; | |
2464 | err = proc_doulongvec_minmax(&t, write, filp, buffer, lenp, ppos); | |
2465 | if (err < 0) | |
2466 | return err; | |
2467 | ||
2468 | if (write) { | |
2469 | /* | |
2470 | * Poor man's atomic or. Not worth adding a primitive | |
2471 | * to everyone's atomic.h for this | |
2472 | */ | |
2473 | int i; | |
2474 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2475 | if ((tmptaint >> i) & 1) | |
2476 | add_taint(i); | |
2477 | } | |
2478 | } | |
2479 | ||
2480 | return err; | |
34f5a398 TT |
2481 | } |
2482 | ||
1da177e4 LT |
2483 | struct do_proc_dointvec_minmax_conv_param { |
2484 | int *min; | |
2485 | int *max; | |
2486 | }; | |
2487 | ||
2488 | static int do_proc_dointvec_minmax_conv(int *negp, unsigned long *lvalp, | |
2489 | int *valp, | |
2490 | int write, void *data) | |
2491 | { | |
2492 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2493 | if (write) { | |
2494 | int val = *negp ? -*lvalp : *lvalp; | |
2495 | if ((param->min && *param->min > val) || | |
2496 | (param->max && *param->max < val)) | |
2497 | return -EINVAL; | |
2498 | *valp = val; | |
2499 | } else { | |
2500 | int val = *valp; | |
2501 | if (val < 0) { | |
2502 | *negp = -1; | |
2503 | *lvalp = (unsigned long)-val; | |
2504 | } else { | |
2505 | *negp = 0; | |
2506 | *lvalp = (unsigned long)val; | |
2507 | } | |
2508 | } | |
2509 | return 0; | |
2510 | } | |
2511 | ||
2512 | /** | |
2513 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2514 | * @table: the sysctl table | |
2515 | * @write: %TRUE if this is a write to the sysctl file | |
2516 | * @filp: the file structure | |
2517 | * @buffer: the user buffer | |
2518 | * @lenp: the size of the user buffer | |
2519 | * @ppos: file position | |
2520 | * | |
2521 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2522 | * values from/to the user buffer, treated as an ASCII string. | |
2523 | * | |
2524 | * This routine will ensure the values are within the range specified by | |
2525 | * table->extra1 (min) and table->extra2 (max). | |
2526 | * | |
2527 | * Returns 0 on success. | |
2528 | */ | |
d8217f07 | 2529 | int proc_dointvec_minmax(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2530 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2531 | { | |
2532 | struct do_proc_dointvec_minmax_conv_param param = { | |
2533 | .min = (int *) table->extra1, | |
2534 | .max = (int *) table->extra2, | |
2535 | }; | |
2536 | return do_proc_dointvec(table, write, filp, buffer, lenp, ppos, | |
2537 | do_proc_dointvec_minmax_conv, ¶m); | |
2538 | } | |
2539 | ||
d8217f07 | 2540 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2541 | struct file *filp, |
2542 | void __user *buffer, | |
2543 | size_t *lenp, loff_t *ppos, | |
2544 | unsigned long convmul, | |
2545 | unsigned long convdiv) | |
2546 | { | |
2547 | #define TMPBUFLEN 21 | |
2548 | unsigned long *i, *min, *max, val; | |
2549 | int vleft, first=1, neg; | |
2550 | size_t len, left; | |
2551 | char buf[TMPBUFLEN], *p; | |
2552 | char __user *s = buffer; | |
2553 | ||
fcfbd547 | 2554 | if (!data || !table->maxlen || !*lenp || |
1da177e4 LT |
2555 | (*ppos && !write)) { |
2556 | *lenp = 0; | |
2557 | return 0; | |
2558 | } | |
2559 | ||
fcfbd547 | 2560 | i = (unsigned long *) data; |
1da177e4 LT |
2561 | min = (unsigned long *) table->extra1; |
2562 | max = (unsigned long *) table->extra2; | |
2563 | vleft = table->maxlen / sizeof(unsigned long); | |
2564 | left = *lenp; | |
2565 | ||
2566 | for (; left && vleft--; i++, min++, max++, first=0) { | |
2567 | if (write) { | |
2568 | while (left) { | |
2569 | char c; | |
2570 | if (get_user(c, s)) | |
2571 | return -EFAULT; | |
2572 | if (!isspace(c)) | |
2573 | break; | |
2574 | left--; | |
2575 | s++; | |
2576 | } | |
2577 | if (!left) | |
2578 | break; | |
2579 | neg = 0; | |
2580 | len = left; | |
2581 | if (len > TMPBUFLEN-1) | |
2582 | len = TMPBUFLEN-1; | |
2583 | if (copy_from_user(buf, s, len)) | |
2584 | return -EFAULT; | |
2585 | buf[len] = 0; | |
2586 | p = buf; | |
2587 | if (*p == '-' && left > 1) { | |
2588 | neg = 1; | |
bd9b0bac | 2589 | p++; |
1da177e4 LT |
2590 | } |
2591 | if (*p < '0' || *p > '9') | |
2592 | break; | |
2593 | val = simple_strtoul(p, &p, 0) * convmul / convdiv ; | |
2594 | len = p-buf; | |
2595 | if ((len < left) && *p && !isspace(*p)) | |
2596 | break; | |
2597 | if (neg) | |
2598 | val = -val; | |
2599 | s += len; | |
2600 | left -= len; | |
2601 | ||
2602 | if(neg) | |
2603 | continue; | |
2604 | if ((min && val < *min) || (max && val > *max)) | |
2605 | continue; | |
2606 | *i = val; | |
2607 | } else { | |
2608 | p = buf; | |
2609 | if (!first) | |
2610 | *p++ = '\t'; | |
2611 | sprintf(p, "%lu", convdiv * (*i) / convmul); | |
2612 | len = strlen(buf); | |
2613 | if (len > left) | |
2614 | len = left; | |
2615 | if(copy_to_user(s, buf, len)) | |
2616 | return -EFAULT; | |
2617 | left -= len; | |
2618 | s += len; | |
2619 | } | |
2620 | } | |
2621 | ||
2622 | if (!write && !first && left) { | |
2623 | if(put_user('\n', s)) | |
2624 | return -EFAULT; | |
2625 | left--, s++; | |
2626 | } | |
2627 | if (write) { | |
2628 | while (left) { | |
2629 | char c; | |
2630 | if (get_user(c, s++)) | |
2631 | return -EFAULT; | |
2632 | if (!isspace(c)) | |
2633 | break; | |
2634 | left--; | |
2635 | } | |
2636 | } | |
2637 | if (write && first) | |
2638 | return -EINVAL; | |
2639 | *lenp -= left; | |
2640 | *ppos += *lenp; | |
2641 | return 0; | |
2642 | #undef TMPBUFLEN | |
2643 | } | |
2644 | ||
d8217f07 | 2645 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2646 | struct file *filp, |
2647 | void __user *buffer, | |
2648 | size_t *lenp, loff_t *ppos, | |
2649 | unsigned long convmul, | |
2650 | unsigned long convdiv) | |
2651 | { | |
2652 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
2653 | filp, buffer, lenp, ppos, convmul, convdiv); | |
2654 | } | |
2655 | ||
1da177e4 LT |
2656 | /** |
2657 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2658 | * @table: the sysctl table | |
2659 | * @write: %TRUE if this is a write to the sysctl file | |
2660 | * @filp: the file structure | |
2661 | * @buffer: the user buffer | |
2662 | * @lenp: the size of the user buffer | |
2663 | * @ppos: file position | |
2664 | * | |
2665 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2666 | * values from/to the user buffer, treated as an ASCII string. | |
2667 | * | |
2668 | * This routine will ensure the values are within the range specified by | |
2669 | * table->extra1 (min) and table->extra2 (max). | |
2670 | * | |
2671 | * Returns 0 on success. | |
2672 | */ | |
d8217f07 | 2673 | int proc_doulongvec_minmax(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2674 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2675 | { | |
2676 | return do_proc_doulongvec_minmax(table, write, filp, buffer, lenp, ppos, 1l, 1l); | |
2677 | } | |
2678 | ||
2679 | /** | |
2680 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2681 | * @table: the sysctl table | |
2682 | * @write: %TRUE if this is a write to the sysctl file | |
2683 | * @filp: the file structure | |
2684 | * @buffer: the user buffer | |
2685 | * @lenp: the size of the user buffer | |
2686 | * @ppos: file position | |
2687 | * | |
2688 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2689 | * values from/to the user buffer, treated as an ASCII string. The values | |
2690 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2691 | * | |
2692 | * This routine will ensure the values are within the range specified by | |
2693 | * table->extra1 (min) and table->extra2 (max). | |
2694 | * | |
2695 | * Returns 0 on success. | |
2696 | */ | |
d8217f07 | 2697 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2698 | struct file *filp, |
2699 | void __user *buffer, | |
2700 | size_t *lenp, loff_t *ppos) | |
2701 | { | |
2702 | return do_proc_doulongvec_minmax(table, write, filp, buffer, | |
2703 | lenp, ppos, HZ, 1000l); | |
2704 | } | |
2705 | ||
2706 | ||
2707 | static int do_proc_dointvec_jiffies_conv(int *negp, unsigned long *lvalp, | |
2708 | int *valp, | |
2709 | int write, void *data) | |
2710 | { | |
2711 | if (write) { | |
cba9f33d BS |
2712 | if (*lvalp > LONG_MAX / HZ) |
2713 | return 1; | |
1da177e4 LT |
2714 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2715 | } else { | |
2716 | int val = *valp; | |
2717 | unsigned long lval; | |
2718 | if (val < 0) { | |
2719 | *negp = -1; | |
2720 | lval = (unsigned long)-val; | |
2721 | } else { | |
2722 | *negp = 0; | |
2723 | lval = (unsigned long)val; | |
2724 | } | |
2725 | *lvalp = lval / HZ; | |
2726 | } | |
2727 | return 0; | |
2728 | } | |
2729 | ||
2730 | static int do_proc_dointvec_userhz_jiffies_conv(int *negp, unsigned long *lvalp, | |
2731 | int *valp, | |
2732 | int write, void *data) | |
2733 | { | |
2734 | if (write) { | |
cba9f33d BS |
2735 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2736 | return 1; | |
1da177e4 LT |
2737 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2738 | } else { | |
2739 | int val = *valp; | |
2740 | unsigned long lval; | |
2741 | if (val < 0) { | |
2742 | *negp = -1; | |
2743 | lval = (unsigned long)-val; | |
2744 | } else { | |
2745 | *negp = 0; | |
2746 | lval = (unsigned long)val; | |
2747 | } | |
2748 | *lvalp = jiffies_to_clock_t(lval); | |
2749 | } | |
2750 | return 0; | |
2751 | } | |
2752 | ||
2753 | static int do_proc_dointvec_ms_jiffies_conv(int *negp, unsigned long *lvalp, | |
2754 | int *valp, | |
2755 | int write, void *data) | |
2756 | { | |
2757 | if (write) { | |
2758 | *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); | |
2759 | } else { | |
2760 | int val = *valp; | |
2761 | unsigned long lval; | |
2762 | if (val < 0) { | |
2763 | *negp = -1; | |
2764 | lval = (unsigned long)-val; | |
2765 | } else { | |
2766 | *negp = 0; | |
2767 | lval = (unsigned long)val; | |
2768 | } | |
2769 | *lvalp = jiffies_to_msecs(lval); | |
2770 | } | |
2771 | return 0; | |
2772 | } | |
2773 | ||
2774 | /** | |
2775 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2776 | * @table: the sysctl table | |
2777 | * @write: %TRUE if this is a write to the sysctl file | |
2778 | * @filp: the file structure | |
2779 | * @buffer: the user buffer | |
2780 | * @lenp: the size of the user buffer | |
2781 | * @ppos: file position | |
2782 | * | |
2783 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2784 | * values from/to the user buffer, treated as an ASCII string. | |
2785 | * The values read are assumed to be in seconds, and are converted into | |
2786 | * jiffies. | |
2787 | * | |
2788 | * Returns 0 on success. | |
2789 | */ | |
d8217f07 | 2790 | int proc_dointvec_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2791 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2792 | { | |
2793 | return do_proc_dointvec(table,write,filp,buffer,lenp,ppos, | |
2794 | do_proc_dointvec_jiffies_conv,NULL); | |
2795 | } | |
2796 | ||
2797 | /** | |
2798 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2799 | * @table: the sysctl table | |
2800 | * @write: %TRUE if this is a write to the sysctl file | |
2801 | * @filp: the file structure | |
2802 | * @buffer: the user buffer | |
2803 | * @lenp: the size of the user buffer | |
1e5d5331 | 2804 | * @ppos: pointer to the file position |
1da177e4 LT |
2805 | * |
2806 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2807 | * values from/to the user buffer, treated as an ASCII string. | |
2808 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2809 | * are converted into jiffies. | |
2810 | * | |
2811 | * Returns 0 on success. | |
2812 | */ | |
d8217f07 | 2813 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2814 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2815 | { | |
2816 | return do_proc_dointvec(table,write,filp,buffer,lenp,ppos, | |
2817 | do_proc_dointvec_userhz_jiffies_conv,NULL); | |
2818 | } | |
2819 | ||
2820 | /** | |
2821 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2822 | * @table: the sysctl table | |
2823 | * @write: %TRUE if this is a write to the sysctl file | |
2824 | * @filp: the file structure | |
2825 | * @buffer: the user buffer | |
2826 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2827 | * @ppos: file position |
2828 | * @ppos: the current position in the file | |
1da177e4 LT |
2829 | * |
2830 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2831 | * values from/to the user buffer, treated as an ASCII string. | |
2832 | * The values read are assumed to be in 1/1000 seconds, and | |
2833 | * are converted into jiffies. | |
2834 | * | |
2835 | * Returns 0 on success. | |
2836 | */ | |
d8217f07 | 2837 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2838 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2839 | { | |
2840 | return do_proc_dointvec(table, write, filp, buffer, lenp, ppos, | |
2841 | do_proc_dointvec_ms_jiffies_conv, NULL); | |
2842 | } | |
2843 | ||
d8217f07 | 2844 | static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp, |
9ec52099 CLG |
2845 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2846 | { | |
2847 | struct pid *new_pid; | |
2848 | pid_t tmp; | |
2849 | int r; | |
2850 | ||
6c5f3e7b | 2851 | tmp = pid_vnr(cad_pid); |
9ec52099 CLG |
2852 | |
2853 | r = __do_proc_dointvec(&tmp, table, write, filp, buffer, | |
2854 | lenp, ppos, NULL, NULL); | |
2855 | if (r || !write) | |
2856 | return r; | |
2857 | ||
2858 | new_pid = find_get_pid(tmp); | |
2859 | if (!new_pid) | |
2860 | return -ESRCH; | |
2861 | ||
2862 | put_pid(xchg(&cad_pid, new_pid)); | |
2863 | return 0; | |
2864 | } | |
2865 | ||
1da177e4 LT |
2866 | #else /* CONFIG_PROC_FS */ |
2867 | ||
d8217f07 | 2868 | int proc_dostring(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2869 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2870 | { | |
2871 | return -ENOSYS; | |
2872 | } | |
2873 | ||
d8217f07 | 2874 | int proc_dointvec(struct ctl_table *table, int write, struct file *filp, |
1da177e4 | 2875 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2876 | { |
2877 | return -ENOSYS; | |
2878 | } | |
2879 | ||
d8217f07 | 2880 | int proc_dointvec_minmax(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2881 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2882 | { | |
2883 | return -ENOSYS; | |
2884 | } | |
2885 | ||
d8217f07 | 2886 | int proc_dointvec_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2887 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2888 | { | |
2889 | return -ENOSYS; | |
2890 | } | |
2891 | ||
d8217f07 | 2892 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2893 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2894 | { | |
2895 | return -ENOSYS; | |
2896 | } | |
2897 | ||
d8217f07 | 2898 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2899 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2900 | { | |
2901 | return -ENOSYS; | |
2902 | } | |
2903 | ||
d8217f07 | 2904 | int proc_doulongvec_minmax(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2905 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2906 | { | |
2907 | return -ENOSYS; | |
2908 | } | |
2909 | ||
d8217f07 | 2910 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2911 | struct file *filp, |
2912 | void __user *buffer, | |
2913 | size_t *lenp, loff_t *ppos) | |
2914 | { | |
2915 | return -ENOSYS; | |
2916 | } | |
2917 | ||
2918 | ||
2919 | #endif /* CONFIG_PROC_FS */ | |
2920 | ||
2921 | ||
b89a8171 | 2922 | #ifdef CONFIG_SYSCTL_SYSCALL |
1da177e4 LT |
2923 | /* |
2924 | * General sysctl support routines | |
2925 | */ | |
2926 | ||
49a0c458 | 2927 | /* The generic sysctl data routine (used if no strategy routine supplied) */ |
f221e726 | 2928 | int sysctl_data(struct ctl_table *table, |
49a0c458 EB |
2929 | void __user *oldval, size_t __user *oldlenp, |
2930 | void __user *newval, size_t newlen) | |
2931 | { | |
2932 | size_t len; | |
2933 | ||
2934 | /* Get out of I don't have a variable */ | |
2935 | if (!table->data || !table->maxlen) | |
2936 | return -ENOTDIR; | |
2937 | ||
2938 | if (oldval && oldlenp) { | |
2939 | if (get_user(len, oldlenp)) | |
2940 | return -EFAULT; | |
2941 | if (len) { | |
2942 | if (len > table->maxlen) | |
2943 | len = table->maxlen; | |
2944 | if (copy_to_user(oldval, table->data, len)) | |
2945 | return -EFAULT; | |
2946 | if (put_user(len, oldlenp)) | |
2947 | return -EFAULT; | |
2948 | } | |
2949 | } | |
2950 | ||
2951 | if (newval && newlen) { | |
2952 | if (newlen > table->maxlen) | |
2953 | newlen = table->maxlen; | |
2954 | ||
2955 | if (copy_from_user(table->data, newval, newlen)) | |
2956 | return -EFAULT; | |
2957 | } | |
2958 | return 1; | |
2959 | } | |
2960 | ||
1da177e4 | 2961 | /* The generic string strategy routine: */ |
f221e726 | 2962 | int sysctl_string(struct ctl_table *table, |
1da177e4 | 2963 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2964 | void __user *newval, size_t newlen) |
1da177e4 | 2965 | { |
1da177e4 LT |
2966 | if (!table->data || !table->maxlen) |
2967 | return -ENOTDIR; | |
2968 | ||
2969 | if (oldval && oldlenp) { | |
de9e007d LT |
2970 | size_t bufsize; |
2971 | if (get_user(bufsize, oldlenp)) | |
1da177e4 | 2972 | return -EFAULT; |
de9e007d LT |
2973 | if (bufsize) { |
2974 | size_t len = strlen(table->data), copied; | |
2975 | ||
2976 | /* This shouldn't trigger for a well-formed sysctl */ | |
2977 | if (len > table->maxlen) | |
1da177e4 | 2978 | len = table->maxlen; |
de9e007d LT |
2979 | |
2980 | /* Copy up to a max of bufsize-1 bytes of the string */ | |
2981 | copied = (len >= bufsize) ? bufsize - 1 : len; | |
2982 | ||
2983 | if (copy_to_user(oldval, table->data, copied) || | |
2984 | put_user(0, (char __user *)(oldval + copied))) | |
1da177e4 | 2985 | return -EFAULT; |
de9e007d | 2986 | if (put_user(len, oldlenp)) |
1da177e4 LT |
2987 | return -EFAULT; |
2988 | } | |
2989 | } | |
2990 | if (newval && newlen) { | |
de9e007d | 2991 | size_t len = newlen; |
1da177e4 LT |
2992 | if (len > table->maxlen) |
2993 | len = table->maxlen; | |
2994 | if(copy_from_user(table->data, newval, len)) | |
2995 | return -EFAULT; | |
2996 | if (len == table->maxlen) | |
2997 | len--; | |
2998 | ((char *) table->data)[len] = 0; | |
2999 | } | |
82c9df82 | 3000 | return 1; |
1da177e4 LT |
3001 | } |
3002 | ||
3003 | /* | |
3004 | * This function makes sure that all of the integers in the vector | |
3005 | * are between the minimum and maximum values given in the arrays | |
3006 | * table->extra1 and table->extra2, respectively. | |
3007 | */ | |
f221e726 | 3008 | int sysctl_intvec(struct ctl_table *table, |
1da177e4 | 3009 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 3010 | void __user *newval, size_t newlen) |
1da177e4 LT |
3011 | { |
3012 | ||
3013 | if (newval && newlen) { | |
3014 | int __user *vec = (int __user *) newval; | |
3015 | int *min = (int *) table->extra1; | |
3016 | int *max = (int *) table->extra2; | |
3017 | size_t length; | |
3018 | int i; | |
3019 | ||
3020 | if (newlen % sizeof(int) != 0) | |
3021 | return -EINVAL; | |
3022 | ||
3023 | if (!table->extra1 && !table->extra2) | |
3024 | return 0; | |
3025 | ||
3026 | if (newlen > table->maxlen) | |
3027 | newlen = table->maxlen; | |
3028 | length = newlen / sizeof(int); | |
3029 | ||
3030 | for (i = 0; i < length; i++) { | |
3031 | int value; | |
3032 | if (get_user(value, vec + i)) | |
3033 | return -EFAULT; | |
3034 | if (min && value < min[i]) | |
3035 | return -EINVAL; | |
3036 | if (max && value > max[i]) | |
3037 | return -EINVAL; | |
3038 | } | |
3039 | } | |
3040 | return 0; | |
3041 | } | |
3042 | ||
3043 | /* Strategy function to convert jiffies to seconds */ | |
f221e726 | 3044 | int sysctl_jiffies(struct ctl_table *table, |
1da177e4 | 3045 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 3046 | void __user *newval, size_t newlen) |
1da177e4 | 3047 | { |
3ee75ac3 | 3048 | if (oldval && oldlenp) { |
1da177e4 | 3049 | size_t olen; |
3ee75ac3 AD |
3050 | |
3051 | if (get_user(olen, oldlenp)) | |
3052 | return -EFAULT; | |
3053 | if (olen) { | |
3054 | int val; | |
3055 | ||
3056 | if (olen < sizeof(int)) | |
3057 | return -EINVAL; | |
3058 | ||
3059 | val = *(int *)(table->data) / HZ; | |
3060 | if (put_user(val, (int __user *)oldval)) | |
3061 | return -EFAULT; | |
3062 | if (put_user(sizeof(int), oldlenp)) | |
1da177e4 | 3063 | return -EFAULT; |
1da177e4 | 3064 | } |
1da177e4 LT |
3065 | } |
3066 | if (newval && newlen) { | |
3067 | int new; | |
3068 | if (newlen != sizeof(int)) | |
3069 | return -EINVAL; | |
3070 | if (get_user(new, (int __user *)newval)) | |
3071 | return -EFAULT; | |
3072 | *(int *)(table->data) = new*HZ; | |
3073 | } | |
3074 | return 1; | |
3075 | } | |
3076 | ||
3077 | /* Strategy function to convert jiffies to seconds */ | |
f221e726 | 3078 | int sysctl_ms_jiffies(struct ctl_table *table, |
1da177e4 | 3079 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 3080 | void __user *newval, size_t newlen) |
1da177e4 | 3081 | { |
3ee75ac3 | 3082 | if (oldval && oldlenp) { |
1da177e4 | 3083 | size_t olen; |
3ee75ac3 AD |
3084 | |
3085 | if (get_user(olen, oldlenp)) | |
3086 | return -EFAULT; | |
3087 | if (olen) { | |
3088 | int val; | |
3089 | ||
3090 | if (olen < sizeof(int)) | |
3091 | return -EINVAL; | |
3092 | ||
3093 | val = jiffies_to_msecs(*(int *)(table->data)); | |
3094 | if (put_user(val, (int __user *)oldval)) | |
3095 | return -EFAULT; | |
3096 | if (put_user(sizeof(int), oldlenp)) | |
1da177e4 | 3097 | return -EFAULT; |
1da177e4 | 3098 | } |
1da177e4 LT |
3099 | } |
3100 | if (newval && newlen) { | |
3101 | int new; | |
3102 | if (newlen != sizeof(int)) | |
3103 | return -EINVAL; | |
3104 | if (get_user(new, (int __user *)newval)) | |
3105 | return -EFAULT; | |
3106 | *(int *)(table->data) = msecs_to_jiffies(new); | |
3107 | } | |
3108 | return 1; | |
3109 | } | |
3110 | ||
c4b8b769 | 3111 | |
c4b8b769 | 3112 | |
b89a8171 | 3113 | #else /* CONFIG_SYSCTL_SYSCALL */ |
1da177e4 LT |
3114 | |
3115 | ||
1e7bfb21 | 3116 | SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args) |
1da177e4 | 3117 | { |
0e009be8 | 3118 | struct __sysctl_args tmp; |
7058cb02 | 3119 | int error; |
0e009be8 | 3120 | |
0e009be8 EB |
3121 | if (copy_from_user(&tmp, args, sizeof(tmp))) |
3122 | return -EFAULT; | |
0e009be8 | 3123 | |
7058cb02 | 3124 | error = deprecated_sysctl_warning(&tmp); |
b89a8171 | 3125 | |
7058cb02 EB |
3126 | /* If no error reading the parameters then just -ENOSYS ... */ |
3127 | if (!error) | |
3128 | error = -ENOSYS; | |
3129 | ||
3130 | return error; | |
1da177e4 LT |
3131 | } |
3132 | ||
f221e726 | 3133 | int sysctl_data(struct ctl_table *table, |
49a0c458 EB |
3134 | void __user *oldval, size_t __user *oldlenp, |
3135 | void __user *newval, size_t newlen) | |
3136 | { | |
3137 | return -ENOSYS; | |
3138 | } | |
3139 | ||
f221e726 | 3140 | int sysctl_string(struct ctl_table *table, |
1da177e4 | 3141 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 3142 | void __user *newval, size_t newlen) |
1da177e4 LT |
3143 | { |
3144 | return -ENOSYS; | |
3145 | } | |
3146 | ||
f221e726 | 3147 | int sysctl_intvec(struct ctl_table *table, |
1da177e4 | 3148 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 3149 | void __user *newval, size_t newlen) |
1da177e4 LT |
3150 | { |
3151 | return -ENOSYS; | |
3152 | } | |
3153 | ||
f221e726 | 3154 | int sysctl_jiffies(struct ctl_table *table, |
1da177e4 | 3155 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 3156 | void __user *newval, size_t newlen) |
1da177e4 LT |
3157 | { |
3158 | return -ENOSYS; | |
3159 | } | |
3160 | ||
f221e726 | 3161 | int sysctl_ms_jiffies(struct ctl_table *table, |
1da177e4 | 3162 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 3163 | void __user *newval, size_t newlen) |
1da177e4 LT |
3164 | { |
3165 | return -ENOSYS; | |
3166 | } | |
3167 | ||
b89a8171 | 3168 | #endif /* CONFIG_SYSCTL_SYSCALL */ |
1da177e4 | 3169 | |
7058cb02 EB |
3170 | static int deprecated_sysctl_warning(struct __sysctl_args *args) |
3171 | { | |
3172 | static int msg_count; | |
3173 | int name[CTL_MAXNAME]; | |
3174 | int i; | |
3175 | ||
6fc48af8 TH |
3176 | /* Check args->nlen. */ |
3177 | if (args->nlen < 0 || args->nlen > CTL_MAXNAME) | |
3178 | return -ENOTDIR; | |
3179 | ||
7058cb02 EB |
3180 | /* Read in the sysctl name for better debug message logging */ |
3181 | for (i = 0; i < args->nlen; i++) | |
3182 | if (get_user(name[i], args->name + i)) | |
3183 | return -EFAULT; | |
3184 | ||
3185 | /* Ignore accesses to kernel.version */ | |
3186 | if ((args->nlen == 2) && (name[0] == CTL_KERN) && (name[1] == KERN_VERSION)) | |
3187 | return 0; | |
3188 | ||
3189 | if (msg_count < 5) { | |
3190 | msg_count++; | |
3191 | printk(KERN_INFO | |
3192 | "warning: process `%s' used the deprecated sysctl " | |
3193 | "system call with ", current->comm); | |
3194 | for (i = 0; i < args->nlen; i++) | |
3195 | printk("%d.", name[i]); | |
3196 | printk("\n"); | |
3197 | } | |
3198 | return 0; | |
3199 | } | |
3200 | ||
1da177e4 LT |
3201 | /* |
3202 | * No sense putting this after each symbol definition, twice, | |
3203 | * exception granted :-) | |
3204 | */ | |
3205 | EXPORT_SYMBOL(proc_dointvec); | |
3206 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
3207 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
3208 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
3209 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
3210 | EXPORT_SYMBOL(proc_dostring); | |
3211 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
3212 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); | |
3213 | EXPORT_SYMBOL(register_sysctl_table); | |
29e796fd | 3214 | EXPORT_SYMBOL(register_sysctl_paths); |
1da177e4 LT |
3215 | EXPORT_SYMBOL(sysctl_intvec); |
3216 | EXPORT_SYMBOL(sysctl_jiffies); | |
3217 | EXPORT_SYMBOL(sysctl_ms_jiffies); | |
3218 | EXPORT_SYMBOL(sysctl_string); | |
49a0c458 | 3219 | EXPORT_SYMBOL(sysctl_data); |
1da177e4 | 3220 | EXPORT_SYMBOL(unregister_sysctl_table); |