]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 LT |
21 | #include <linux/module.h> |
22 | #include <linux/mm.h> | |
23 | #include <linux/swap.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/sysctl.h> | |
26 | #include <linux/proc_fs.h> | |
72c2d582 | 27 | #include <linux/security.h> |
1da177e4 LT |
28 | #include <linux/ctype.h> |
29 | #include <linux/utsname.h> | |
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> |
cdd6c482 | 53 | #include <linux/perf_event.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 | 108 | static int one_hundred = 100; |
af91322e DY |
109 | #ifdef CONFIG_PRINTK |
110 | static int ten_thousand = 10000; | |
111 | #endif | |
c4f3b63f | 112 | |
9e4a5bda AR |
113 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
114 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
115 | ||
1da177e4 LT |
116 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
117 | static int maxolduid = 65535; | |
118 | static int minolduid; | |
8ad4b1fb | 119 | static int min_percpu_pagelist_fract = 8; |
1da177e4 LT |
120 | |
121 | static int ngroups_max = NGROUPS_MAX; | |
122 | ||
a1ef5adb | 123 | #ifdef CONFIG_MODULES |
1da177e4 | 124 | extern char modprobe_path[]; |
3d43321b | 125 | extern int modules_disabled; |
1da177e4 | 126 | #endif |
1da177e4 LT |
127 | #ifdef CONFIG_CHR_DEV_SG |
128 | extern int sg_big_buff; | |
129 | #endif | |
1da177e4 | 130 | |
72c57ed5 | 131 | #ifdef CONFIG_SPARC |
17f04fbb | 132 | #include <asm/system.h> |
1da177e4 LT |
133 | #endif |
134 | ||
0871420f DM |
135 | #ifdef CONFIG_SPARC64 |
136 | extern int sysctl_tsb_ratio; | |
137 | #endif | |
138 | ||
1da177e4 LT |
139 | #ifdef __hppa__ |
140 | extern int pwrsw_enabled; | |
141 | extern int unaligned_enabled; | |
142 | #endif | |
143 | ||
347a8dc3 | 144 | #ifdef CONFIG_S390 |
1da177e4 LT |
145 | #ifdef CONFIG_MATHEMU |
146 | extern int sysctl_ieee_emulation_warnings; | |
147 | #endif | |
148 | extern int sysctl_userprocess_debug; | |
951f22d5 | 149 | extern int spin_retry; |
1da177e4 LT |
150 | #endif |
151 | ||
1da177e4 LT |
152 | #ifdef CONFIG_BSD_PROCESS_ACCT |
153 | extern int acct_parm[]; | |
154 | #endif | |
155 | ||
d2b176ed JS |
156 | #ifdef CONFIG_IA64 |
157 | extern int no_unaligned_warning; | |
88fc241f | 158 | extern int unaligned_dump_stack; |
d2b176ed JS |
159 | #endif |
160 | ||
23f78d4a IM |
161 | #ifdef CONFIG_RT_MUTEXES |
162 | extern int max_lock_depth; | |
163 | #endif | |
164 | ||
d6f8ff73 | 165 | #ifdef CONFIG_PROC_SYSCTL |
d8217f07 | 166 | static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp, |
9ec52099 | 167 | void __user *buffer, size_t *lenp, loff_t *ppos); |
25ddbb18 | 168 | static int proc_taint(struct ctl_table *table, int write, struct file *filp, |
34f5a398 | 169 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 170 | #endif |
9ec52099 | 171 | |
d8217f07 | 172 | static struct ctl_table root_table[]; |
e51b6ba0 EB |
173 | static struct ctl_table_root sysctl_table_root; |
174 | static struct ctl_table_header root_table_header = { | |
b380b0d4 | 175 | .count = 1, |
e51b6ba0 | 176 | .ctl_table = root_table, |
73455092 | 177 | .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list), |
e51b6ba0 | 178 | .root = &sysctl_table_root, |
73455092 | 179 | .set = &sysctl_table_root.default_set, |
e51b6ba0 EB |
180 | }; |
181 | static struct ctl_table_root sysctl_table_root = { | |
182 | .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list), | |
73455092 | 183 | .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry), |
e51b6ba0 | 184 | }; |
1da177e4 | 185 | |
d8217f07 EB |
186 | static struct ctl_table kern_table[]; |
187 | static struct ctl_table vm_table[]; | |
188 | static struct ctl_table fs_table[]; | |
189 | static struct ctl_table debug_table[]; | |
190 | static struct ctl_table dev_table[]; | |
191 | extern struct ctl_table random_table[]; | |
2d9048e2 | 192 | #ifdef CONFIG_INOTIFY_USER |
d8217f07 | 193 | extern struct ctl_table inotify_table[]; |
0399cb08 | 194 | #endif |
7ef9964e DL |
195 | #ifdef CONFIG_EPOLL |
196 | extern struct ctl_table epoll_table[]; | |
197 | #endif | |
1da177e4 LT |
198 | |
199 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
200 | int sysctl_legacy_va_layout; | |
201 | #endif | |
202 | ||
f20786ff PZ |
203 | extern int prove_locking; |
204 | extern int lock_stat; | |
9bc9a6bd | 205 | |
1da177e4 LT |
206 | /* The default sysctl tables: */ |
207 | ||
d8217f07 | 208 | static struct ctl_table root_table[] = { |
1da177e4 LT |
209 | { |
210 | .ctl_name = CTL_KERN, | |
211 | .procname = "kernel", | |
212 | .mode = 0555, | |
213 | .child = kern_table, | |
214 | }, | |
215 | { | |
216 | .ctl_name = CTL_VM, | |
217 | .procname = "vm", | |
218 | .mode = 0555, | |
219 | .child = vm_table, | |
220 | }, | |
1da177e4 LT |
221 | { |
222 | .ctl_name = CTL_FS, | |
223 | .procname = "fs", | |
224 | .mode = 0555, | |
225 | .child = fs_table, | |
226 | }, | |
227 | { | |
228 | .ctl_name = CTL_DEBUG, | |
229 | .procname = "debug", | |
230 | .mode = 0555, | |
231 | .child = debug_table, | |
232 | }, | |
233 | { | |
234 | .ctl_name = CTL_DEV, | |
235 | .procname = "dev", | |
236 | .mode = 0555, | |
237 | .child = dev_table, | |
238 | }, | |
2be7fe07 AM |
239 | /* |
240 | * NOTE: do not add new entries to this table unless you have read | |
241 | * Documentation/sysctl/ctl_unnumbered.txt | |
242 | */ | |
1da177e4 LT |
243 | { .ctl_name = 0 } |
244 | }; | |
245 | ||
77e54a1f | 246 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
247 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
248 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
249 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
250 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
77e54a1f IM |
251 | #endif |
252 | ||
d8217f07 | 253 | static struct ctl_table kern_table[] = { |
2bba22c5 MG |
254 | { |
255 | .ctl_name = CTL_UNNUMBERED, | |
256 | .procname = "sched_child_runs_first", | |
257 | .data = &sysctl_sched_child_runs_first, | |
258 | .maxlen = sizeof(unsigned int), | |
259 | .mode = 0644, | |
260 | .proc_handler = &proc_dointvec, | |
261 | }, | |
77e54a1f IM |
262 | #ifdef CONFIG_SCHED_DEBUG |
263 | { | |
264 | .ctl_name = CTL_UNNUMBERED, | |
b2be5e96 PZ |
265 | .procname = "sched_min_granularity_ns", |
266 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
267 | .maxlen = sizeof(unsigned int), |
268 | .mode = 0644, | |
b2be5e96 PZ |
269 | .proc_handler = &sched_nr_latency_handler, |
270 | .strategy = &sysctl_intvec, | |
271 | .extra1 = &min_sched_granularity_ns, | |
272 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 273 | }, |
21805085 PZ |
274 | { |
275 | .ctl_name = CTL_UNNUMBERED, | |
276 | .procname = "sched_latency_ns", | |
277 | .data = &sysctl_sched_latency, | |
278 | .maxlen = sizeof(unsigned int), | |
279 | .mode = 0644, | |
b2be5e96 | 280 | .proc_handler = &sched_nr_latency_handler, |
21805085 PZ |
281 | .strategy = &sysctl_intvec, |
282 | .extra1 = &min_sched_granularity_ns, | |
283 | .extra2 = &max_sched_granularity_ns, | |
284 | }, | |
77e54a1f IM |
285 | { |
286 | .ctl_name = CTL_UNNUMBERED, | |
287 | .procname = "sched_wakeup_granularity_ns", | |
288 | .data = &sysctl_sched_wakeup_granularity, | |
289 | .maxlen = sizeof(unsigned int), | |
290 | .mode = 0644, | |
291 | .proc_handler = &proc_dointvec_minmax, | |
292 | .strategy = &sysctl_intvec, | |
77e54a1f IM |
293 | .extra1 = &min_wakeup_granularity_ns, |
294 | .extra2 = &max_wakeup_granularity_ns, | |
295 | }, | |
2398f2c6 PZ |
296 | { |
297 | .ctl_name = CTL_UNNUMBERED, | |
298 | .procname = "sched_shares_ratelimit", | |
299 | .data = &sysctl_sched_shares_ratelimit, | |
300 | .maxlen = sizeof(unsigned int), | |
301 | .mode = 0644, | |
302 | .proc_handler = &proc_dointvec, | |
303 | }, | |
ffda12a1 PZ |
304 | { |
305 | .ctl_name = CTL_UNNUMBERED, | |
306 | .procname = "sched_shares_thresh", | |
307 | .data = &sysctl_sched_shares_thresh, | |
308 | .maxlen = sizeof(unsigned int), | |
309 | .mode = 0644, | |
310 | .proc_handler = &proc_dointvec_minmax, | |
311 | .strategy = &sysctl_intvec, | |
312 | .extra1 = &zero, | |
313 | }, | |
1fc84aaa PZ |
314 | { |
315 | .ctl_name = CTL_UNNUMBERED, | |
316 | .procname = "sched_features", | |
317 | .data = &sysctl_sched_features, | |
318 | .maxlen = sizeof(unsigned int), | |
319 | .mode = 0644, | |
320 | .proc_handler = &proc_dointvec, | |
321 | }, | |
da84d961 IM |
322 | { |
323 | .ctl_name = CTL_UNNUMBERED, | |
324 | .procname = "sched_migration_cost", | |
325 | .data = &sysctl_sched_migration_cost, | |
326 | .maxlen = sizeof(unsigned int), | |
327 | .mode = 0644, | |
328 | .proc_handler = &proc_dointvec, | |
329 | }, | |
b82d9fdd PZ |
330 | { |
331 | .ctl_name = CTL_UNNUMBERED, | |
332 | .procname = "sched_nr_migrate", | |
333 | .data = &sysctl_sched_nr_migrate, | |
334 | .maxlen = sizeof(unsigned int), | |
fa85ae24 PZ |
335 | .mode = 0644, |
336 | .proc_handler = &proc_dointvec, | |
337 | }, | |
e9e9250b PZ |
338 | { |
339 | .ctl_name = CTL_UNNUMBERED, | |
340 | .procname = "sched_time_avg", | |
341 | .data = &sysctl_sched_time_avg, | |
342 | .maxlen = sizeof(unsigned int), | |
343 | .mode = 0644, | |
344 | .proc_handler = &proc_dointvec, | |
345 | }, | |
cd1bb94b AB |
346 | { |
347 | .ctl_name = CTL_UNNUMBERED, | |
348 | .procname = "timer_migration", | |
349 | .data = &sysctl_timer_migration, | |
350 | .maxlen = sizeof(unsigned int), | |
351 | .mode = 0644, | |
bfdb4d9f AB |
352 | .proc_handler = &proc_dointvec_minmax, |
353 | .strategy = &sysctl_intvec, | |
354 | .extra1 = &zero, | |
355 | .extra2 = &one, | |
fa85ae24 | 356 | }, |
1fc84aaa | 357 | #endif |
9f0c1e56 PZ |
358 | { |
359 | .ctl_name = CTL_UNNUMBERED, | |
360 | .procname = "sched_rt_period_us", | |
361 | .data = &sysctl_sched_rt_period, | |
362 | .maxlen = sizeof(unsigned int), | |
363 | .mode = 0644, | |
d0b27fa7 | 364 | .proc_handler = &sched_rt_handler, |
9f0c1e56 PZ |
365 | }, |
366 | { | |
367 | .ctl_name = CTL_UNNUMBERED, | |
368 | .procname = "sched_rt_runtime_us", | |
369 | .data = &sysctl_sched_rt_runtime, | |
370 | .maxlen = sizeof(int), | |
371 | .mode = 0644, | |
d0b27fa7 | 372 | .proc_handler = &sched_rt_handler, |
9f0c1e56 | 373 | }, |
1799e35d IM |
374 | { |
375 | .ctl_name = CTL_UNNUMBERED, | |
376 | .procname = "sched_compat_yield", | |
377 | .data = &sysctl_sched_compat_yield, | |
378 | .maxlen = sizeof(unsigned int), | |
379 | .mode = 0644, | |
380 | .proc_handler = &proc_dointvec, | |
381 | }, | |
f20786ff PZ |
382 | #ifdef CONFIG_PROVE_LOCKING |
383 | { | |
384 | .ctl_name = CTL_UNNUMBERED, | |
385 | .procname = "prove_locking", | |
386 | .data = &prove_locking, | |
387 | .maxlen = sizeof(int), | |
388 | .mode = 0644, | |
389 | .proc_handler = &proc_dointvec, | |
390 | }, | |
391 | #endif | |
392 | #ifdef CONFIG_LOCK_STAT | |
393 | { | |
394 | .ctl_name = CTL_UNNUMBERED, | |
395 | .procname = "lock_stat", | |
396 | .data = &lock_stat, | |
397 | .maxlen = sizeof(int), | |
398 | .mode = 0644, | |
399 | .proc_handler = &proc_dointvec, | |
400 | }, | |
77e54a1f | 401 | #endif |
1da177e4 LT |
402 | { |
403 | .ctl_name = KERN_PANIC, | |
404 | .procname = "panic", | |
405 | .data = &panic_timeout, | |
406 | .maxlen = sizeof(int), | |
407 | .mode = 0644, | |
408 | .proc_handler = &proc_dointvec, | |
409 | }, | |
410 | { | |
411 | .ctl_name = KERN_CORE_USES_PID, | |
412 | .procname = "core_uses_pid", | |
413 | .data = &core_uses_pid, | |
414 | .maxlen = sizeof(int), | |
415 | .mode = 0644, | |
416 | .proc_handler = &proc_dointvec, | |
417 | }, | |
418 | { | |
419 | .ctl_name = KERN_CORE_PATTERN, | |
420 | .procname = "core_pattern", | |
421 | .data = core_pattern, | |
71ce92f3 | 422 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 LT |
423 | .mode = 0644, |
424 | .proc_handler = &proc_dostring, | |
425 | .strategy = &sysctl_string, | |
426 | }, | |
34f5a398 | 427 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 428 | { |
1da177e4 | 429 | .procname = "tainted", |
25ddbb18 | 430 | .maxlen = sizeof(long), |
34f5a398 | 431 | .mode = 0644, |
25ddbb18 | 432 | .proc_handler = &proc_taint, |
1da177e4 | 433 | }, |
34f5a398 | 434 | #endif |
9745512c AV |
435 | #ifdef CONFIG_LATENCYTOP |
436 | { | |
437 | .procname = "latencytop", | |
438 | .data = &latencytop_enabled, | |
439 | .maxlen = sizeof(int), | |
440 | .mode = 0644, | |
441 | .proc_handler = &proc_dointvec, | |
442 | }, | |
443 | #endif | |
1da177e4 LT |
444 | #ifdef CONFIG_BLK_DEV_INITRD |
445 | { | |
446 | .ctl_name = KERN_REALROOTDEV, | |
447 | .procname = "real-root-dev", | |
448 | .data = &real_root_dev, | |
449 | .maxlen = sizeof(int), | |
450 | .mode = 0644, | |
451 | .proc_handler = &proc_dointvec, | |
452 | }, | |
453 | #endif | |
45807a1d IM |
454 | { |
455 | .ctl_name = CTL_UNNUMBERED, | |
456 | .procname = "print-fatal-signals", | |
457 | .data = &print_fatal_signals, | |
458 | .maxlen = sizeof(int), | |
459 | .mode = 0644, | |
460 | .proc_handler = &proc_dointvec, | |
461 | }, | |
72c57ed5 | 462 | #ifdef CONFIG_SPARC |
1da177e4 LT |
463 | { |
464 | .ctl_name = KERN_SPARC_REBOOT, | |
465 | .procname = "reboot-cmd", | |
466 | .data = reboot_command, | |
467 | .maxlen = 256, | |
468 | .mode = 0644, | |
469 | .proc_handler = &proc_dostring, | |
470 | .strategy = &sysctl_string, | |
471 | }, | |
472 | { | |
473 | .ctl_name = KERN_SPARC_STOP_A, | |
474 | .procname = "stop-a", | |
475 | .data = &stop_a_enabled, | |
476 | .maxlen = sizeof (int), | |
477 | .mode = 0644, | |
478 | .proc_handler = &proc_dointvec, | |
479 | }, | |
480 | { | |
481 | .ctl_name = KERN_SPARC_SCONS_PWROFF, | |
482 | .procname = "scons-poweroff", | |
483 | .data = &scons_pwroff, | |
484 | .maxlen = sizeof (int), | |
485 | .mode = 0644, | |
486 | .proc_handler = &proc_dointvec, | |
487 | }, | |
488 | #endif | |
0871420f DM |
489 | #ifdef CONFIG_SPARC64 |
490 | { | |
491 | .ctl_name = CTL_UNNUMBERED, | |
492 | .procname = "tsb-ratio", | |
493 | .data = &sysctl_tsb_ratio, | |
494 | .maxlen = sizeof (int), | |
495 | .mode = 0644, | |
496 | .proc_handler = &proc_dointvec, | |
497 | }, | |
498 | #endif | |
1da177e4 LT |
499 | #ifdef __hppa__ |
500 | { | |
501 | .ctl_name = KERN_HPPA_PWRSW, | |
502 | .procname = "soft-power", | |
503 | .data = &pwrsw_enabled, | |
504 | .maxlen = sizeof (int), | |
505 | .mode = 0644, | |
506 | .proc_handler = &proc_dointvec, | |
507 | }, | |
508 | { | |
509 | .ctl_name = KERN_HPPA_UNALIGNED, | |
510 | .procname = "unaligned-trap", | |
511 | .data = &unaligned_enabled, | |
512 | .maxlen = sizeof (int), | |
513 | .mode = 0644, | |
514 | .proc_handler = &proc_dointvec, | |
515 | }, | |
516 | #endif | |
517 | { | |
518 | .ctl_name = KERN_CTLALTDEL, | |
519 | .procname = "ctrl-alt-del", | |
520 | .data = &C_A_D, | |
521 | .maxlen = sizeof(int), | |
522 | .mode = 0644, | |
523 | .proc_handler = &proc_dointvec, | |
524 | }, | |
606576ce | 525 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f SR |
526 | { |
527 | .ctl_name = CTL_UNNUMBERED, | |
528 | .procname = "ftrace_enabled", | |
529 | .data = &ftrace_enabled, | |
530 | .maxlen = sizeof(int), | |
531 | .mode = 0644, | |
532 | .proc_handler = &ftrace_enable_sysctl, | |
533 | }, | |
534 | #endif | |
f38f1d2a SR |
535 | #ifdef CONFIG_STACK_TRACER |
536 | { | |
537 | .ctl_name = CTL_UNNUMBERED, | |
538 | .procname = "stack_tracer_enabled", | |
539 | .data = &stack_tracer_enabled, | |
540 | .maxlen = sizeof(int), | |
541 | .mode = 0644, | |
542 | .proc_handler = &stack_trace_sysctl, | |
543 | }, | |
544 | #endif | |
944ac425 SR |
545 | #ifdef CONFIG_TRACING |
546 | { | |
547 | .ctl_name = CTL_UNNUMBERED, | |
3299b4dd | 548 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
549 | .data = &ftrace_dump_on_oops, |
550 | .maxlen = sizeof(int), | |
551 | .mode = 0644, | |
552 | .proc_handler = &proc_dointvec, | |
553 | }, | |
554 | #endif | |
a1ef5adb | 555 | #ifdef CONFIG_MODULES |
1da177e4 LT |
556 | { |
557 | .ctl_name = KERN_MODPROBE, | |
558 | .procname = "modprobe", | |
559 | .data = &modprobe_path, | |
560 | .maxlen = KMOD_PATH_LEN, | |
561 | .mode = 0644, | |
562 | .proc_handler = &proc_dostring, | |
563 | .strategy = &sysctl_string, | |
564 | }, | |
3d43321b KC |
565 | { |
566 | .ctl_name = CTL_UNNUMBERED, | |
567 | .procname = "modules_disabled", | |
568 | .data = &modules_disabled, | |
569 | .maxlen = sizeof(int), | |
570 | .mode = 0644, | |
571 | /* only handle a transition from default "0" to "1" */ | |
572 | .proc_handler = &proc_dointvec_minmax, | |
573 | .extra1 = &one, | |
574 | .extra2 = &one, | |
575 | }, | |
1da177e4 | 576 | #endif |
57ae2508 | 577 | #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET) |
1da177e4 LT |
578 | { |
579 | .ctl_name = KERN_HOTPLUG, | |
580 | .procname = "hotplug", | |
312c004d KS |
581 | .data = &uevent_helper, |
582 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 LT |
583 | .mode = 0644, |
584 | .proc_handler = &proc_dostring, | |
585 | .strategy = &sysctl_string, | |
586 | }, | |
587 | #endif | |
588 | #ifdef CONFIG_CHR_DEV_SG | |
589 | { | |
590 | .ctl_name = KERN_SG_BIG_BUFF, | |
591 | .procname = "sg-big-buff", | |
592 | .data = &sg_big_buff, | |
593 | .maxlen = sizeof (int), | |
594 | .mode = 0444, | |
595 | .proc_handler = &proc_dointvec, | |
596 | }, | |
597 | #endif | |
598 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
599 | { | |
600 | .ctl_name = KERN_ACCT, | |
601 | .procname = "acct", | |
602 | .data = &acct_parm, | |
603 | .maxlen = 3*sizeof(int), | |
604 | .mode = 0644, | |
605 | .proc_handler = &proc_dointvec, | |
606 | }, | |
607 | #endif | |
1da177e4 LT |
608 | #ifdef CONFIG_MAGIC_SYSRQ |
609 | { | |
610 | .ctl_name = KERN_SYSRQ, | |
611 | .procname = "sysrq", | |
5d6f647f | 612 | .data = &__sysrq_enabled, |
1da177e4 LT |
613 | .maxlen = sizeof (int), |
614 | .mode = 0644, | |
615 | .proc_handler = &proc_dointvec, | |
616 | }, | |
617 | #endif | |
d6f8ff73 | 618 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 619 | { |
1da177e4 | 620 | .procname = "cad_pid", |
9ec52099 | 621 | .data = NULL, |
1da177e4 LT |
622 | .maxlen = sizeof (int), |
623 | .mode = 0600, | |
9ec52099 | 624 | .proc_handler = &proc_do_cad_pid, |
1da177e4 | 625 | }, |
d6f8ff73 | 626 | #endif |
1da177e4 LT |
627 | { |
628 | .ctl_name = KERN_MAX_THREADS, | |
629 | .procname = "threads-max", | |
630 | .data = &max_threads, | |
631 | .maxlen = sizeof(int), | |
632 | .mode = 0644, | |
633 | .proc_handler = &proc_dointvec, | |
634 | }, | |
635 | { | |
636 | .ctl_name = KERN_RANDOM, | |
637 | .procname = "random", | |
638 | .mode = 0555, | |
639 | .child = random_table, | |
640 | }, | |
1da177e4 LT |
641 | { |
642 | .ctl_name = KERN_OVERFLOWUID, | |
643 | .procname = "overflowuid", | |
644 | .data = &overflowuid, | |
645 | .maxlen = sizeof(int), | |
646 | .mode = 0644, | |
647 | .proc_handler = &proc_dointvec_minmax, | |
648 | .strategy = &sysctl_intvec, | |
649 | .extra1 = &minolduid, | |
650 | .extra2 = &maxolduid, | |
651 | }, | |
652 | { | |
653 | .ctl_name = KERN_OVERFLOWGID, | |
654 | .procname = "overflowgid", | |
655 | .data = &overflowgid, | |
656 | .maxlen = sizeof(int), | |
657 | .mode = 0644, | |
658 | .proc_handler = &proc_dointvec_minmax, | |
659 | .strategy = &sysctl_intvec, | |
660 | .extra1 = &minolduid, | |
661 | .extra2 = &maxolduid, | |
662 | }, | |
347a8dc3 | 663 | #ifdef CONFIG_S390 |
1da177e4 LT |
664 | #ifdef CONFIG_MATHEMU |
665 | { | |
666 | .ctl_name = KERN_IEEE_EMULATION_WARNINGS, | |
667 | .procname = "ieee_emulation_warnings", | |
668 | .data = &sysctl_ieee_emulation_warnings, | |
669 | .maxlen = sizeof(int), | |
670 | .mode = 0644, | |
671 | .proc_handler = &proc_dointvec, | |
672 | }, | |
1da177e4 LT |
673 | #endif |
674 | { | |
675 | .ctl_name = KERN_S390_USER_DEBUG_LOGGING, | |
676 | .procname = "userprocess_debug", | |
677 | .data = &sysctl_userprocess_debug, | |
678 | .maxlen = sizeof(int), | |
679 | .mode = 0644, | |
680 | .proc_handler = &proc_dointvec, | |
681 | }, | |
682 | #endif | |
683 | { | |
684 | .ctl_name = KERN_PIDMAX, | |
685 | .procname = "pid_max", | |
686 | .data = &pid_max, | |
687 | .maxlen = sizeof (int), | |
688 | .mode = 0644, | |
689 | .proc_handler = &proc_dointvec_minmax, | |
690 | .strategy = sysctl_intvec, | |
691 | .extra1 = &pid_max_min, | |
692 | .extra2 = &pid_max_max, | |
693 | }, | |
694 | { | |
695 | .ctl_name = KERN_PANIC_ON_OOPS, | |
696 | .procname = "panic_on_oops", | |
697 | .data = &panic_on_oops, | |
698 | .maxlen = sizeof(int), | |
699 | .mode = 0644, | |
700 | .proc_handler = &proc_dointvec, | |
701 | }, | |
7ef3d2fd JP |
702 | #if defined CONFIG_PRINTK |
703 | { | |
704 | .ctl_name = KERN_PRINTK, | |
705 | .procname = "printk", | |
706 | .data = &console_loglevel, | |
707 | .maxlen = 4*sizeof(int), | |
708 | .mode = 0644, | |
709 | .proc_handler = &proc_dointvec, | |
710 | }, | |
1da177e4 LT |
711 | { |
712 | .ctl_name = KERN_PRINTK_RATELIMIT, | |
713 | .procname = "printk_ratelimit", | |
717115e1 | 714 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
715 | .maxlen = sizeof(int), |
716 | .mode = 0644, | |
717 | .proc_handler = &proc_dointvec_jiffies, | |
718 | .strategy = &sysctl_jiffies, | |
719 | }, | |
720 | { | |
721 | .ctl_name = KERN_PRINTK_RATELIMIT_BURST, | |
722 | .procname = "printk_ratelimit_burst", | |
717115e1 | 723 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
724 | .maxlen = sizeof(int), |
725 | .mode = 0644, | |
726 | .proc_handler = &proc_dointvec, | |
727 | }, | |
af91322e DY |
728 | { |
729 | .ctl_name = CTL_UNNUMBERED, | |
730 | .procname = "printk_delay", | |
731 | .data = &printk_delay_msec, | |
732 | .maxlen = sizeof(int), | |
733 | .mode = 0644, | |
734 | .proc_handler = &proc_dointvec_minmax, | |
735 | .strategy = &sysctl_intvec, | |
736 | .extra1 = &zero, | |
737 | .extra2 = &ten_thousand, | |
738 | }, | |
7ef3d2fd | 739 | #endif |
1da177e4 LT |
740 | { |
741 | .ctl_name = KERN_NGROUPS_MAX, | |
742 | .procname = "ngroups_max", | |
743 | .data = &ngroups_max, | |
744 | .maxlen = sizeof (int), | |
745 | .mode = 0444, | |
746 | .proc_handler = &proc_dointvec, | |
747 | }, | |
748 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
749 | { | |
750 | .ctl_name = KERN_UNKNOWN_NMI_PANIC, | |
751 | .procname = "unknown_nmi_panic", | |
752 | .data = &unknown_nmi_panic, | |
753 | .maxlen = sizeof (int), | |
754 | .mode = 0644, | |
2fbe7b25 | 755 | .proc_handler = &proc_dointvec, |
1da177e4 | 756 | }, |
407984f1 | 757 | { |
407984f1 DZ |
758 | .procname = "nmi_watchdog", |
759 | .data = &nmi_watchdog_enabled, | |
760 | .maxlen = sizeof (int), | |
761 | .mode = 0644, | |
762 | .proc_handler = &proc_nmi_enabled, | |
1da177e4 LT |
763 | }, |
764 | #endif | |
765 | #if defined(CONFIG_X86) | |
8da5adda DZ |
766 | { |
767 | .ctl_name = KERN_PANIC_ON_NMI, | |
768 | .procname = "panic_on_unrecovered_nmi", | |
769 | .data = &panic_on_unrecovered_nmi, | |
770 | .maxlen = sizeof(int), | |
771 | .mode = 0644, | |
772 | .proc_handler = &proc_dointvec, | |
773 | }, | |
5211a242 KG |
774 | { |
775 | .ctl_name = CTL_UNNUMBERED, | |
776 | .procname = "panic_on_io_nmi", | |
777 | .data = &panic_on_io_nmi, | |
778 | .maxlen = sizeof(int), | |
779 | .mode = 0644, | |
780 | .proc_handler = &proc_dointvec, | |
781 | }, | |
1da177e4 LT |
782 | { |
783 | .ctl_name = KERN_BOOTLOADER_TYPE, | |
784 | .procname = "bootloader_type", | |
785 | .data = &bootloader_type, | |
786 | .maxlen = sizeof (int), | |
787 | .mode = 0444, | |
788 | .proc_handler = &proc_dointvec, | |
789 | }, | |
5031296c PA |
790 | { |
791 | .ctl_name = CTL_UNNUMBERED, | |
792 | .procname = "bootloader_version", | |
793 | .data = &bootloader_version, | |
794 | .maxlen = sizeof (int), | |
795 | .mode = 0444, | |
796 | .proc_handler = &proc_dointvec, | |
797 | }, | |
0741f4d2 CE |
798 | { |
799 | .ctl_name = CTL_UNNUMBERED, | |
800 | .procname = "kstack_depth_to_print", | |
801 | .data = &kstack_depth_to_print, | |
802 | .maxlen = sizeof(int), | |
803 | .mode = 0644, | |
804 | .proc_handler = &proc_dointvec, | |
805 | }, | |
6e7c4025 IM |
806 | { |
807 | .ctl_name = CTL_UNNUMBERED, | |
808 | .procname = "io_delay_type", | |
809 | .data = &io_delay_type, | |
810 | .maxlen = sizeof(int), | |
811 | .mode = 0644, | |
812 | .proc_handler = &proc_dointvec, | |
813 | }, | |
1da177e4 | 814 | #endif |
7a9166e3 | 815 | #if defined(CONFIG_MMU) |
1da177e4 LT |
816 | { |
817 | .ctl_name = KERN_RANDOMIZE, | |
818 | .procname = "randomize_va_space", | |
819 | .data = &randomize_va_space, | |
820 | .maxlen = sizeof(int), | |
821 | .mode = 0644, | |
822 | .proc_handler = &proc_dointvec, | |
823 | }, | |
7a9166e3 | 824 | #endif |
0152fb37 | 825 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 MS |
826 | { |
827 | .ctl_name = KERN_SPIN_RETRY, | |
828 | .procname = "spin_retry", | |
829 | .data = &spin_retry, | |
830 | .maxlen = sizeof (int), | |
831 | .mode = 0644, | |
832 | .proc_handler = &proc_dointvec, | |
833 | }, | |
c255d844 | 834 | #endif |
673d5b43 | 835 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 836 | { |
c255d844 | 837 | .procname = "acpi_video_flags", |
77afcf78 | 838 | .data = &acpi_realmode_flags, |
c255d844 PM |
839 | .maxlen = sizeof (unsigned long), |
840 | .mode = 0644, | |
7f99f06f | 841 | .proc_handler = &proc_doulongvec_minmax, |
c255d844 | 842 | }, |
d2b176ed JS |
843 | #endif |
844 | #ifdef CONFIG_IA64 | |
845 | { | |
846 | .ctl_name = KERN_IA64_UNALIGNED, | |
847 | .procname = "ignore-unaligned-usertrap", | |
848 | .data = &no_unaligned_warning, | |
849 | .maxlen = sizeof (int), | |
850 | .mode = 0644, | |
851 | .proc_handler = &proc_dointvec, | |
852 | }, | |
88fc241f DC |
853 | { |
854 | .ctl_name = CTL_UNNUMBERED, | |
855 | .procname = "unaligned-dump-stack", | |
856 | .data = &unaligned_dump_stack, | |
857 | .maxlen = sizeof (int), | |
858 | .mode = 0644, | |
859 | .proc_handler = &proc_dointvec, | |
860 | }, | |
bebfa101 | 861 | #endif |
c4f3b63f | 862 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
9c44bc03 IM |
863 | { |
864 | .ctl_name = CTL_UNNUMBERED, | |
865 | .procname = "softlockup_panic", | |
866 | .data = &softlockup_panic, | |
867 | .maxlen = sizeof(int), | |
868 | .mode = 0644, | |
4dca10a9 | 869 | .proc_handler = &proc_dointvec_minmax, |
9c44bc03 IM |
870 | .strategy = &sysctl_intvec, |
871 | .extra1 = &zero, | |
872 | .extra2 = &one, | |
873 | }, | |
c4f3b63f RT |
874 | { |
875 | .ctl_name = CTL_UNNUMBERED, | |
876 | .procname = "softlockup_thresh", | |
877 | .data = &softlockup_thresh, | |
9383d967 | 878 | .maxlen = sizeof(int), |
c4f3b63f | 879 | .mode = 0644, |
baf48f65 | 880 | .proc_handler = &proc_dosoftlockup_thresh, |
c4f3b63f | 881 | .strategy = &sysctl_intvec, |
9383d967 | 882 | .extra1 = &neg_one, |
c4f3b63f RT |
883 | .extra2 = &sixty, |
884 | }, | |
e162b39a MSB |
885 | #endif |
886 | #ifdef CONFIG_DETECT_HUNG_TASK | |
887 | { | |
888 | .ctl_name = CTL_UNNUMBERED, | |
889 | .procname = "hung_task_panic", | |
890 | .data = &sysctl_hung_task_panic, | |
891 | .maxlen = sizeof(int), | |
892 | .mode = 0644, | |
893 | .proc_handler = &proc_dointvec_minmax, | |
894 | .strategy = &sysctl_intvec, | |
895 | .extra1 = &zero, | |
896 | .extra2 = &one, | |
897 | }, | |
82a1fcb9 IM |
898 | { |
899 | .ctl_name = CTL_UNNUMBERED, | |
900 | .procname = "hung_task_check_count", | |
901 | .data = &sysctl_hung_task_check_count, | |
90739081 | 902 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 903 | .mode = 0644, |
90739081 | 904 | .proc_handler = &proc_doulongvec_minmax, |
82a1fcb9 IM |
905 | .strategy = &sysctl_intvec, |
906 | }, | |
907 | { | |
908 | .ctl_name = CTL_UNNUMBERED, | |
909 | .procname = "hung_task_timeout_secs", | |
910 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 911 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 912 | .mode = 0644, |
e162b39a | 913 | .proc_handler = &proc_dohung_task_timeout_secs, |
82a1fcb9 IM |
914 | .strategy = &sysctl_intvec, |
915 | }, | |
916 | { | |
917 | .ctl_name = CTL_UNNUMBERED, | |
918 | .procname = "hung_task_warnings", | |
919 | .data = &sysctl_hung_task_warnings, | |
90739081 | 920 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 921 | .mode = 0644, |
90739081 | 922 | .proc_handler = &proc_doulongvec_minmax, |
82a1fcb9 IM |
923 | .strategy = &sysctl_intvec, |
924 | }, | |
c4f3b63f | 925 | #endif |
bebfa101 AK |
926 | #ifdef CONFIG_COMPAT |
927 | { | |
928 | .ctl_name = KERN_COMPAT_LOG, | |
929 | .procname = "compat-log", | |
930 | .data = &compat_log, | |
931 | .maxlen = sizeof (int), | |
932 | .mode = 0644, | |
933 | .proc_handler = &proc_dointvec, | |
934 | }, | |
951f22d5 | 935 | #endif |
23f78d4a IM |
936 | #ifdef CONFIG_RT_MUTEXES |
937 | { | |
938 | .ctl_name = KERN_MAX_LOCK_DEPTH, | |
939 | .procname = "max_lock_depth", | |
940 | .data = &max_lock_depth, | |
941 | .maxlen = sizeof(int), | |
942 | .mode = 0644, | |
943 | .proc_handler = &proc_dointvec, | |
944 | }, | |
5096add8 | 945 | #endif |
10a0a8d4 JF |
946 | { |
947 | .ctl_name = CTL_UNNUMBERED, | |
948 | .procname = "poweroff_cmd", | |
949 | .data = &poweroff_cmd, | |
950 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
951 | .mode = 0644, | |
952 | .proc_handler = &proc_dostring, | |
953 | .strategy = &sysctl_string, | |
954 | }, | |
0b77f5bf DH |
955 | #ifdef CONFIG_KEYS |
956 | { | |
957 | .ctl_name = CTL_UNNUMBERED, | |
958 | .procname = "keys", | |
959 | .mode = 0555, | |
960 | .child = key_sysctls, | |
961 | }, | |
962 | #endif | |
31a72bce PM |
963 | #ifdef CONFIG_RCU_TORTURE_TEST |
964 | { | |
965 | .ctl_name = CTL_UNNUMBERED, | |
966 | .procname = "rcutorture_runnable", | |
967 | .data = &rcutorture_runnable, | |
968 | .maxlen = sizeof(int), | |
969 | .mode = 0644, | |
970 | .proc_handler = &proc_dointvec, | |
971 | }, | |
972 | #endif | |
12e22c5e DH |
973 | #ifdef CONFIG_SLOW_WORK |
974 | { | |
975 | .ctl_name = CTL_UNNUMBERED, | |
976 | .procname = "slow-work", | |
977 | .mode = 0555, | |
978 | .child = slow_work_sysctls, | |
979 | }, | |
980 | #endif | |
cdd6c482 | 981 | #ifdef CONFIG_PERF_EVENTS |
1ccd1549 PZ |
982 | { |
983 | .ctl_name = CTL_UNNUMBERED, | |
cdd6c482 IM |
984 | .procname = "perf_event_paranoid", |
985 | .data = &sysctl_perf_event_paranoid, | |
986 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 PZ |
987 | .mode = 0644, |
988 | .proc_handler = &proc_dointvec, | |
989 | }, | |
c5078f78 PZ |
990 | { |
991 | .ctl_name = CTL_UNNUMBERED, | |
cdd6c482 IM |
992 | .procname = "perf_event_mlock_kb", |
993 | .data = &sysctl_perf_event_mlock, | |
994 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 PZ |
995 | .mode = 0644, |
996 | .proc_handler = &proc_dointvec, | |
997 | }, | |
a78ac325 PZ |
998 | { |
999 | .ctl_name = CTL_UNNUMBERED, | |
cdd6c482 IM |
1000 | .procname = "perf_event_max_sample_rate", |
1001 | .data = &sysctl_perf_event_sample_rate, | |
1002 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 PZ |
1003 | .mode = 0644, |
1004 | .proc_handler = &proc_dointvec, | |
1005 | }, | |
1ccd1549 | 1006 | #endif |
dfec072e VN |
1007 | #ifdef CONFIG_KMEMCHECK |
1008 | { | |
1009 | .ctl_name = CTL_UNNUMBERED, | |
1010 | .procname = "kmemcheck", | |
1011 | .data = &kmemcheck_enabled, | |
1012 | .maxlen = sizeof(int), | |
1013 | .mode = 0644, | |
1014 | .proc_handler = &proc_dointvec, | |
1015 | }, | |
1016 | #endif | |
cb684b5b | 1017 | #ifdef CONFIG_BLOCK |
5e605b64 JA |
1018 | { |
1019 | .ctl_name = CTL_UNNUMBERED, | |
1020 | .procname = "blk_iopoll", | |
1021 | .data = &blk_iopoll_enabled, | |
1022 | .maxlen = sizeof(int), | |
1023 | .mode = 0644, | |
1024 | .proc_handler = &proc_dointvec, | |
1025 | }, | |
cb684b5b | 1026 | #endif |
ed2c12f3 AM |
1027 | /* |
1028 | * NOTE: do not add new entries to this table unless you have read | |
1029 | * Documentation/sysctl/ctl_unnumbered.txt | |
1030 | */ | |
1da177e4 LT |
1031 | { .ctl_name = 0 } |
1032 | }; | |
1033 | ||
d8217f07 | 1034 | static struct ctl_table vm_table[] = { |
1da177e4 LT |
1035 | { |
1036 | .ctl_name = VM_OVERCOMMIT_MEMORY, | |
1037 | .procname = "overcommit_memory", | |
1038 | .data = &sysctl_overcommit_memory, | |
1039 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1040 | .mode = 0644, | |
1041 | .proc_handler = &proc_dointvec, | |
1042 | }, | |
fadd8fbd KH |
1043 | { |
1044 | .ctl_name = VM_PANIC_ON_OOM, | |
1045 | .procname = "panic_on_oom", | |
1046 | .data = &sysctl_panic_on_oom, | |
1047 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1048 | .mode = 0644, | |
1049 | .proc_handler = &proc_dointvec, | |
1050 | }, | |
fe071d7e DR |
1051 | { |
1052 | .ctl_name = CTL_UNNUMBERED, | |
1053 | .procname = "oom_kill_allocating_task", | |
1054 | .data = &sysctl_oom_kill_allocating_task, | |
1055 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1056 | .mode = 0644, | |
1057 | .proc_handler = &proc_dointvec, | |
1058 | }, | |
fef1bdd6 DR |
1059 | { |
1060 | .ctl_name = CTL_UNNUMBERED, | |
1061 | .procname = "oom_dump_tasks", | |
1062 | .data = &sysctl_oom_dump_tasks, | |
1063 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1064 | .mode = 0644, | |
1065 | .proc_handler = &proc_dointvec, | |
1066 | }, | |
1da177e4 LT |
1067 | { |
1068 | .ctl_name = VM_OVERCOMMIT_RATIO, | |
1069 | .procname = "overcommit_ratio", | |
1070 | .data = &sysctl_overcommit_ratio, | |
1071 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1072 | .mode = 0644, | |
1073 | .proc_handler = &proc_dointvec, | |
1074 | }, | |
1075 | { | |
1076 | .ctl_name = VM_PAGE_CLUSTER, | |
1077 | .procname = "page-cluster", | |
1078 | .data = &page_cluster, | |
1079 | .maxlen = sizeof(int), | |
1080 | .mode = 0644, | |
1081 | .proc_handler = &proc_dointvec, | |
1082 | }, | |
1083 | { | |
1084 | .ctl_name = VM_DIRTY_BACKGROUND, | |
1085 | .procname = "dirty_background_ratio", | |
1086 | .data = &dirty_background_ratio, | |
1087 | .maxlen = sizeof(dirty_background_ratio), | |
1088 | .mode = 0644, | |
2da02997 | 1089 | .proc_handler = &dirty_background_ratio_handler, |
1da177e4 LT |
1090 | .strategy = &sysctl_intvec, |
1091 | .extra1 = &zero, | |
1092 | .extra2 = &one_hundred, | |
1093 | }, | |
2da02997 DR |
1094 | { |
1095 | .ctl_name = CTL_UNNUMBERED, | |
1096 | .procname = "dirty_background_bytes", | |
1097 | .data = &dirty_background_bytes, | |
1098 | .maxlen = sizeof(dirty_background_bytes), | |
1099 | .mode = 0644, | |
1100 | .proc_handler = &dirty_background_bytes_handler, | |
1101 | .strategy = &sysctl_intvec, | |
fc3501d4 | 1102 | .extra1 = &one_ul, |
2da02997 | 1103 | }, |
1da177e4 LT |
1104 | { |
1105 | .ctl_name = VM_DIRTY_RATIO, | |
1106 | .procname = "dirty_ratio", | |
1107 | .data = &vm_dirty_ratio, | |
1108 | .maxlen = sizeof(vm_dirty_ratio), | |
1109 | .mode = 0644, | |
04fbfdc1 | 1110 | .proc_handler = &dirty_ratio_handler, |
1da177e4 LT |
1111 | .strategy = &sysctl_intvec, |
1112 | .extra1 = &zero, | |
1113 | .extra2 = &one_hundred, | |
1114 | }, | |
2da02997 DR |
1115 | { |
1116 | .ctl_name = CTL_UNNUMBERED, | |
1117 | .procname = "dirty_bytes", | |
1118 | .data = &vm_dirty_bytes, | |
1119 | .maxlen = sizeof(vm_dirty_bytes), | |
1120 | .mode = 0644, | |
1121 | .proc_handler = &dirty_bytes_handler, | |
1122 | .strategy = &sysctl_intvec, | |
9e4a5bda | 1123 | .extra1 = &dirty_bytes_min, |
2da02997 | 1124 | }, |
1da177e4 | 1125 | { |
1da177e4 | 1126 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1127 | .data = &dirty_writeback_interval, |
1128 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 LT |
1129 | .mode = 0644, |
1130 | .proc_handler = &dirty_writeback_centisecs_handler, | |
1131 | }, | |
1132 | { | |
1da177e4 | 1133 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1134 | .data = &dirty_expire_interval, |
1135 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1136 | .mode = 0644, |
704503d8 | 1137 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
1138 | }, |
1139 | { | |
1140 | .ctl_name = VM_NR_PDFLUSH_THREADS, | |
1141 | .procname = "nr_pdflush_threads", | |
1142 | .data = &nr_pdflush_threads, | |
1143 | .maxlen = sizeof nr_pdflush_threads, | |
1144 | .mode = 0444 /* read-only*/, | |
1145 | .proc_handler = &proc_dointvec, | |
1146 | }, | |
1147 | { | |
1148 | .ctl_name = VM_SWAPPINESS, | |
1149 | .procname = "swappiness", | |
1150 | .data = &vm_swappiness, | |
1151 | .maxlen = sizeof(vm_swappiness), | |
1152 | .mode = 0644, | |
1153 | .proc_handler = &proc_dointvec_minmax, | |
1154 | .strategy = &sysctl_intvec, | |
1155 | .extra1 = &zero, | |
1156 | .extra2 = &one_hundred, | |
1157 | }, | |
1158 | #ifdef CONFIG_HUGETLB_PAGE | |
1159 | { | |
1da177e4 | 1160 | .procname = "nr_hugepages", |
e5ff2159 | 1161 | .data = NULL, |
1da177e4 LT |
1162 | .maxlen = sizeof(unsigned long), |
1163 | .mode = 0644, | |
1164 | .proc_handler = &hugetlb_sysctl_handler, | |
1165 | .extra1 = (void *)&hugetlb_zero, | |
1166 | .extra2 = (void *)&hugetlb_infinity, | |
1167 | }, | |
1168 | { | |
1169 | .ctl_name = VM_HUGETLB_GROUP, | |
1170 | .procname = "hugetlb_shm_group", | |
1171 | .data = &sysctl_hugetlb_shm_group, | |
1172 | .maxlen = sizeof(gid_t), | |
1173 | .mode = 0644, | |
1174 | .proc_handler = &proc_dointvec, | |
1175 | }, | |
396faf03 MG |
1176 | { |
1177 | .ctl_name = CTL_UNNUMBERED, | |
1178 | .procname = "hugepages_treat_as_movable", | |
1179 | .data = &hugepages_treat_as_movable, | |
1180 | .maxlen = sizeof(int), | |
1181 | .mode = 0644, | |
1182 | .proc_handler = &hugetlb_treat_movable_handler, | |
1183 | }, | |
d1c3fb1f NA |
1184 | { |
1185 | .ctl_name = CTL_UNNUMBERED, | |
1186 | .procname = "nr_overcommit_hugepages", | |
e5ff2159 AK |
1187 | .data = NULL, |
1188 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1189 | .mode = 0644, |
a3d0c6aa | 1190 | .proc_handler = &hugetlb_overcommit_handler, |
e5ff2159 AK |
1191 | .extra1 = (void *)&hugetlb_zero, |
1192 | .extra2 = (void *)&hugetlb_infinity, | |
d1c3fb1f | 1193 | }, |
1da177e4 LT |
1194 | #endif |
1195 | { | |
1196 | .ctl_name = VM_LOWMEM_RESERVE_RATIO, | |
1197 | .procname = "lowmem_reserve_ratio", | |
1198 | .data = &sysctl_lowmem_reserve_ratio, | |
1199 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1200 | .mode = 0644, | |
1201 | .proc_handler = &lowmem_reserve_ratio_sysctl_handler, | |
1202 | .strategy = &sysctl_intvec, | |
1203 | }, | |
9d0243bc AM |
1204 | { |
1205 | .ctl_name = VM_DROP_PAGECACHE, | |
1206 | .procname = "drop_caches", | |
1207 | .data = &sysctl_drop_caches, | |
1208 | .maxlen = sizeof(int), | |
1209 | .mode = 0644, | |
1210 | .proc_handler = drop_caches_sysctl_handler, | |
1211 | .strategy = &sysctl_intvec, | |
1212 | }, | |
1da177e4 LT |
1213 | { |
1214 | .ctl_name = VM_MIN_FREE_KBYTES, | |
1215 | .procname = "min_free_kbytes", | |
1216 | .data = &min_free_kbytes, | |
1217 | .maxlen = sizeof(min_free_kbytes), | |
1218 | .mode = 0644, | |
1219 | .proc_handler = &min_free_kbytes_sysctl_handler, | |
1220 | .strategy = &sysctl_intvec, | |
1221 | .extra1 = &zero, | |
1222 | }, | |
8ad4b1fb RS |
1223 | { |
1224 | .ctl_name = VM_PERCPU_PAGELIST_FRACTION, | |
1225 | .procname = "percpu_pagelist_fraction", | |
1226 | .data = &percpu_pagelist_fraction, | |
1227 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1228 | .mode = 0644, | |
1229 | .proc_handler = &percpu_pagelist_fraction_sysctl_handler, | |
1230 | .strategy = &sysctl_intvec, | |
1231 | .extra1 = &min_percpu_pagelist_fract, | |
1232 | }, | |
1da177e4 LT |
1233 | #ifdef CONFIG_MMU |
1234 | { | |
1235 | .ctl_name = VM_MAX_MAP_COUNT, | |
1236 | .procname = "max_map_count", | |
1237 | .data = &sysctl_max_map_count, | |
1238 | .maxlen = sizeof(sysctl_max_map_count), | |
1239 | .mode = 0644, | |
1240 | .proc_handler = &proc_dointvec | |
1241 | }, | |
dd8632a1 PM |
1242 | #else |
1243 | { | |
1244 | .ctl_name = CTL_UNNUMBERED, | |
1245 | .procname = "nr_trim_pages", | |
1246 | .data = &sysctl_nr_trim_pages, | |
1247 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1248 | .mode = 0644, | |
1249 | .proc_handler = &proc_dointvec_minmax, | |
1250 | .strategy = &sysctl_intvec, | |
1251 | .extra1 = &zero, | |
1252 | }, | |
1da177e4 LT |
1253 | #endif |
1254 | { | |
1255 | .ctl_name = VM_LAPTOP_MODE, | |
1256 | .procname = "laptop_mode", | |
1257 | .data = &laptop_mode, | |
1258 | .maxlen = sizeof(laptop_mode), | |
1259 | .mode = 0644, | |
ed5b43f1 BS |
1260 | .proc_handler = &proc_dointvec_jiffies, |
1261 | .strategy = &sysctl_jiffies, | |
1da177e4 LT |
1262 | }, |
1263 | { | |
1264 | .ctl_name = VM_BLOCK_DUMP, | |
1265 | .procname = "block_dump", | |
1266 | .data = &block_dump, | |
1267 | .maxlen = sizeof(block_dump), | |
1268 | .mode = 0644, | |
1269 | .proc_handler = &proc_dointvec, | |
1270 | .strategy = &sysctl_intvec, | |
1271 | .extra1 = &zero, | |
1272 | }, | |
1273 | { | |
1274 | .ctl_name = VM_VFS_CACHE_PRESSURE, | |
1275 | .procname = "vfs_cache_pressure", | |
1276 | .data = &sysctl_vfs_cache_pressure, | |
1277 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1278 | .mode = 0644, | |
1279 | .proc_handler = &proc_dointvec, | |
1280 | .strategy = &sysctl_intvec, | |
1281 | .extra1 = &zero, | |
1282 | }, | |
1283 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1284 | { | |
1285 | .ctl_name = VM_LEGACY_VA_LAYOUT, | |
1286 | .procname = "legacy_va_layout", | |
1287 | .data = &sysctl_legacy_va_layout, | |
1288 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1289 | .mode = 0644, | |
1290 | .proc_handler = &proc_dointvec, | |
1291 | .strategy = &sysctl_intvec, | |
1292 | .extra1 = &zero, | |
1293 | }, | |
1294 | #endif | |
1743660b CL |
1295 | #ifdef CONFIG_NUMA |
1296 | { | |
1297 | .ctl_name = VM_ZONE_RECLAIM_MODE, | |
1298 | .procname = "zone_reclaim_mode", | |
1299 | .data = &zone_reclaim_mode, | |
1300 | .maxlen = sizeof(zone_reclaim_mode), | |
1301 | .mode = 0644, | |
1302 | .proc_handler = &proc_dointvec, | |
c84db23c CL |
1303 | .strategy = &sysctl_intvec, |
1304 | .extra1 = &zero, | |
1743660b | 1305 | }, |
9614634f CL |
1306 | { |
1307 | .ctl_name = VM_MIN_UNMAPPED, | |
1308 | .procname = "min_unmapped_ratio", | |
1309 | .data = &sysctl_min_unmapped_ratio, | |
1310 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1311 | .mode = 0644, | |
1312 | .proc_handler = &sysctl_min_unmapped_ratio_sysctl_handler, | |
1313 | .strategy = &sysctl_intvec, | |
1314 | .extra1 = &zero, | |
1315 | .extra2 = &one_hundred, | |
1316 | }, | |
0ff38490 CL |
1317 | { |
1318 | .ctl_name = VM_MIN_SLAB, | |
1319 | .procname = "min_slab_ratio", | |
1320 | .data = &sysctl_min_slab_ratio, | |
1321 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1322 | .mode = 0644, | |
1323 | .proc_handler = &sysctl_min_slab_ratio_sysctl_handler, | |
1324 | .strategy = &sysctl_intvec, | |
1325 | .extra1 = &zero, | |
1326 | .extra2 = &one_hundred, | |
1327 | }, | |
e6e5494c | 1328 | #endif |
77461ab3 CL |
1329 | #ifdef CONFIG_SMP |
1330 | { | |
1331 | .ctl_name = CTL_UNNUMBERED, | |
1332 | .procname = "stat_interval", | |
1333 | .data = &sysctl_stat_interval, | |
1334 | .maxlen = sizeof(sysctl_stat_interval), | |
1335 | .mode = 0644, | |
1336 | .proc_handler = &proc_dointvec_jiffies, | |
1337 | .strategy = &sysctl_jiffies, | |
1338 | }, | |
1339 | #endif | |
ed032189 EP |
1340 | { |
1341 | .ctl_name = CTL_UNNUMBERED, | |
1342 | .procname = "mmap_min_addr", | |
788084ab EP |
1343 | .data = &dac_mmap_min_addr, |
1344 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1345 | .mode = 0644, |
788084ab | 1346 | .proc_handler = &mmap_min_addr_handler, |
ed032189 | 1347 | }, |
f0c0b2b8 KH |
1348 | #ifdef CONFIG_NUMA |
1349 | { | |
1350 | .ctl_name = CTL_UNNUMBERED, | |
1351 | .procname = "numa_zonelist_order", | |
1352 | .data = &numa_zonelist_order, | |
1353 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1354 | .mode = 0644, | |
1355 | .proc_handler = &numa_zonelist_order_handler, | |
1356 | .strategy = &sysctl_string, | |
1357 | }, | |
1358 | #endif | |
2b8232ce | 1359 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1360 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c IM |
1361 | { |
1362 | .ctl_name = VM_VDSO_ENABLED, | |
1363 | .procname = "vdso_enabled", | |
1364 | .data = &vdso_enabled, | |
1365 | .maxlen = sizeof(vdso_enabled), | |
1366 | .mode = 0644, | |
1367 | .proc_handler = &proc_dointvec, | |
1368 | .strategy = &sysctl_intvec, | |
1369 | .extra1 = &zero, | |
1370 | }, | |
1da177e4 | 1371 | #endif |
195cf453 BG |
1372 | #ifdef CONFIG_HIGHMEM |
1373 | { | |
1374 | .ctl_name = CTL_UNNUMBERED, | |
1375 | .procname = "highmem_is_dirtyable", | |
1376 | .data = &vm_highmem_is_dirtyable, | |
1377 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1378 | .mode = 0644, | |
1379 | .proc_handler = &proc_dointvec_minmax, | |
1380 | .strategy = &sysctl_intvec, | |
1381 | .extra1 = &zero, | |
1382 | .extra2 = &one, | |
1383 | }, | |
1384 | #endif | |
4be6f6bb PZ |
1385 | { |
1386 | .ctl_name = CTL_UNNUMBERED, | |
1387 | .procname = "scan_unevictable_pages", | |
1388 | .data = &scan_unevictable_pages, | |
1389 | .maxlen = sizeof(scan_unevictable_pages), | |
1390 | .mode = 0644, | |
1391 | .proc_handler = &scan_unevictable_handler, | |
1392 | }, | |
2be7fe07 AM |
1393 | /* |
1394 | * NOTE: do not add new entries to this table unless you have read | |
1395 | * Documentation/sysctl/ctl_unnumbered.txt | |
1396 | */ | |
1da177e4 LT |
1397 | { .ctl_name = 0 } |
1398 | }; | |
1399 | ||
2abc26fc | 1400 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1401 | static struct ctl_table binfmt_misc_table[] = { |
2abc26fc EB |
1402 | { .ctl_name = 0 } |
1403 | }; | |
1404 | #endif | |
1405 | ||
d8217f07 | 1406 | static struct ctl_table fs_table[] = { |
1da177e4 LT |
1407 | { |
1408 | .ctl_name = FS_NRINODE, | |
1409 | .procname = "inode-nr", | |
1410 | .data = &inodes_stat, | |
1411 | .maxlen = 2*sizeof(int), | |
1412 | .mode = 0444, | |
1413 | .proc_handler = &proc_dointvec, | |
1414 | }, | |
1415 | { | |
1416 | .ctl_name = FS_STATINODE, | |
1417 | .procname = "inode-state", | |
1418 | .data = &inodes_stat, | |
1419 | .maxlen = 7*sizeof(int), | |
1420 | .mode = 0444, | |
1421 | .proc_handler = &proc_dointvec, | |
1422 | }, | |
1423 | { | |
1da177e4 LT |
1424 | .procname = "file-nr", |
1425 | .data = &files_stat, | |
1426 | .maxlen = 3*sizeof(int), | |
1427 | .mode = 0444, | |
529bf6be | 1428 | .proc_handler = &proc_nr_files, |
1da177e4 LT |
1429 | }, |
1430 | { | |
1431 | .ctl_name = FS_MAXFILE, | |
1432 | .procname = "file-max", | |
1433 | .data = &files_stat.max_files, | |
1434 | .maxlen = sizeof(int), | |
1435 | .mode = 0644, | |
1436 | .proc_handler = &proc_dointvec, | |
1437 | }, | |
9cfe015a ED |
1438 | { |
1439 | .ctl_name = CTL_UNNUMBERED, | |
1440 | .procname = "nr_open", | |
1441 | .data = &sysctl_nr_open, | |
1442 | .maxlen = sizeof(int), | |
1443 | .mode = 0644, | |
eceea0b3 AV |
1444 | .proc_handler = &proc_dointvec_minmax, |
1445 | .extra1 = &sysctl_nr_open_min, | |
1446 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1447 | }, |
1da177e4 LT |
1448 | { |
1449 | .ctl_name = FS_DENTRY, | |
1450 | .procname = "dentry-state", | |
1451 | .data = &dentry_stat, | |
1452 | .maxlen = 6*sizeof(int), | |
1453 | .mode = 0444, | |
1454 | .proc_handler = &proc_dointvec, | |
1455 | }, | |
1456 | { | |
1457 | .ctl_name = FS_OVERFLOWUID, | |
1458 | .procname = "overflowuid", | |
1459 | .data = &fs_overflowuid, | |
1460 | .maxlen = sizeof(int), | |
1461 | .mode = 0644, | |
1462 | .proc_handler = &proc_dointvec_minmax, | |
1463 | .strategy = &sysctl_intvec, | |
1464 | .extra1 = &minolduid, | |
1465 | .extra2 = &maxolduid, | |
1466 | }, | |
1467 | { | |
1468 | .ctl_name = FS_OVERFLOWGID, | |
1469 | .procname = "overflowgid", | |
1470 | .data = &fs_overflowgid, | |
1471 | .maxlen = sizeof(int), | |
1472 | .mode = 0644, | |
1473 | .proc_handler = &proc_dointvec_minmax, | |
1474 | .strategy = &sysctl_intvec, | |
1475 | .extra1 = &minolduid, | |
1476 | .extra2 = &maxolduid, | |
1477 | }, | |
bfcd17a6 | 1478 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 LT |
1479 | { |
1480 | .ctl_name = FS_LEASES, | |
1481 | .procname = "leases-enable", | |
1482 | .data = &leases_enable, | |
1483 | .maxlen = sizeof(int), | |
1484 | .mode = 0644, | |
1485 | .proc_handler = &proc_dointvec, | |
1486 | }, | |
bfcd17a6 | 1487 | #endif |
1da177e4 LT |
1488 | #ifdef CONFIG_DNOTIFY |
1489 | { | |
1490 | .ctl_name = FS_DIR_NOTIFY, | |
1491 | .procname = "dir-notify-enable", | |
1492 | .data = &dir_notify_enable, | |
1493 | .maxlen = sizeof(int), | |
1494 | .mode = 0644, | |
1495 | .proc_handler = &proc_dointvec, | |
1496 | }, | |
1497 | #endif | |
1498 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1499 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 LT |
1500 | { |
1501 | .ctl_name = FS_LEASE_TIME, | |
1502 | .procname = "lease-break-time", | |
1503 | .data = &lease_break_time, | |
1504 | .maxlen = sizeof(int), | |
1505 | .mode = 0644, | |
8e654fba | 1506 | .proc_handler = &proc_dointvec, |
1da177e4 | 1507 | }, |
bfcd17a6 | 1508 | #endif |
ebf3f09c | 1509 | #ifdef CONFIG_AIO |
1da177e4 | 1510 | { |
1da177e4 LT |
1511 | .procname = "aio-nr", |
1512 | .data = &aio_nr, | |
1513 | .maxlen = sizeof(aio_nr), | |
1514 | .mode = 0444, | |
d55b5fda | 1515 | .proc_handler = &proc_doulongvec_minmax, |
1da177e4 LT |
1516 | }, |
1517 | { | |
1da177e4 LT |
1518 | .procname = "aio-max-nr", |
1519 | .data = &aio_max_nr, | |
1520 | .maxlen = sizeof(aio_max_nr), | |
1521 | .mode = 0644, | |
d55b5fda | 1522 | .proc_handler = &proc_doulongvec_minmax, |
1da177e4 | 1523 | }, |
ebf3f09c | 1524 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1525 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 RL |
1526 | { |
1527 | .ctl_name = FS_INOTIFY, | |
1528 | .procname = "inotify", | |
1529 | .mode = 0555, | |
1530 | .child = inotify_table, | |
1531 | }, | |
1532 | #endif | |
7ef9964e DL |
1533 | #ifdef CONFIG_EPOLL |
1534 | { | |
1535 | .procname = "epoll", | |
1536 | .mode = 0555, | |
1537 | .child = epoll_table, | |
1538 | }, | |
1539 | #endif | |
1da177e4 | 1540 | #endif |
d6e71144 AC |
1541 | { |
1542 | .ctl_name = KERN_SETUID_DUMPABLE, | |
1543 | .procname = "suid_dumpable", | |
1544 | .data = &suid_dumpable, | |
1545 | .maxlen = sizeof(int), | |
1546 | .mode = 0644, | |
8e654fba MW |
1547 | .proc_handler = &proc_dointvec_minmax, |
1548 | .strategy = &sysctl_intvec, | |
1549 | .extra1 = &zero, | |
1550 | .extra2 = &two, | |
d6e71144 | 1551 | }, |
2abc26fc EB |
1552 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1553 | { | |
1554 | .ctl_name = CTL_UNNUMBERED, | |
1555 | .procname = "binfmt_misc", | |
1556 | .mode = 0555, | |
1557 | .child = binfmt_misc_table, | |
1558 | }, | |
1559 | #endif | |
2be7fe07 AM |
1560 | /* |
1561 | * NOTE: do not add new entries to this table unless you have read | |
1562 | * Documentation/sysctl/ctl_unnumbered.txt | |
2be7fe07 | 1563 | */ |
1da177e4 LT |
1564 | { .ctl_name = 0 } |
1565 | }; | |
1566 | ||
d8217f07 | 1567 | static struct ctl_table debug_table[] = { |
d0c3d534 | 1568 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) |
abd4f750 MAS |
1569 | { |
1570 | .ctl_name = CTL_UNNUMBERED, | |
1571 | .procname = "exception-trace", | |
1572 | .data = &show_unhandled_signals, | |
1573 | .maxlen = sizeof(int), | |
1574 | .mode = 0644, | |
1575 | .proc_handler = proc_dointvec | |
1576 | }, | |
1577 | #endif | |
1da177e4 LT |
1578 | { .ctl_name = 0 } |
1579 | }; | |
1580 | ||
d8217f07 | 1581 | static struct ctl_table dev_table[] = { |
1da177e4 | 1582 | { .ctl_name = 0 } |
0eeca283 | 1583 | }; |
1da177e4 | 1584 | |
330d57fb AV |
1585 | static DEFINE_SPINLOCK(sysctl_lock); |
1586 | ||
1587 | /* called under sysctl_lock */ | |
1588 | static int use_table(struct ctl_table_header *p) | |
1589 | { | |
1590 | if (unlikely(p->unregistering)) | |
1591 | return 0; | |
1592 | p->used++; | |
1593 | return 1; | |
1594 | } | |
1595 | ||
1596 | /* called under sysctl_lock */ | |
1597 | static void unuse_table(struct ctl_table_header *p) | |
1598 | { | |
1599 | if (!--p->used) | |
1600 | if (unlikely(p->unregistering)) | |
1601 | complete(p->unregistering); | |
1602 | } | |
1603 | ||
1604 | /* called under sysctl_lock, will reacquire if has to wait */ | |
1605 | static void start_unregistering(struct ctl_table_header *p) | |
1606 | { | |
1607 | /* | |
1608 | * if p->used is 0, nobody will ever touch that entry again; | |
1609 | * we'll eliminate all paths to it before dropping sysctl_lock | |
1610 | */ | |
1611 | if (unlikely(p->used)) { | |
1612 | struct completion wait; | |
1613 | init_completion(&wait); | |
1614 | p->unregistering = &wait; | |
1615 | spin_unlock(&sysctl_lock); | |
1616 | wait_for_completion(&wait); | |
1617 | spin_lock(&sysctl_lock); | |
f7e6ced4 AV |
1618 | } else { |
1619 | /* anything non-NULL; we'll never dereference it */ | |
1620 | p->unregistering = ERR_PTR(-EINVAL); | |
330d57fb AV |
1621 | } |
1622 | /* | |
1623 | * do not remove from the list until nobody holds it; walking the | |
1624 | * list in do_sysctl() relies on that. | |
1625 | */ | |
1626 | list_del_init(&p->ctl_entry); | |
1627 | } | |
1628 | ||
f7e6ced4 AV |
1629 | void sysctl_head_get(struct ctl_table_header *head) |
1630 | { | |
1631 | spin_lock(&sysctl_lock); | |
1632 | head->count++; | |
1633 | spin_unlock(&sysctl_lock); | |
1634 | } | |
1635 | ||
1636 | void sysctl_head_put(struct ctl_table_header *head) | |
1637 | { | |
1638 | spin_lock(&sysctl_lock); | |
1639 | if (!--head->count) | |
1640 | kfree(head); | |
1641 | spin_unlock(&sysctl_lock); | |
1642 | } | |
1643 | ||
1644 | struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head) | |
1645 | { | |
1646 | if (!head) | |
1647 | BUG(); | |
1648 | spin_lock(&sysctl_lock); | |
1649 | if (!use_table(head)) | |
1650 | head = ERR_PTR(-ENOENT); | |
1651 | spin_unlock(&sysctl_lock); | |
1652 | return head; | |
1653 | } | |
1654 | ||
805b5d5e EB |
1655 | void sysctl_head_finish(struct ctl_table_header *head) |
1656 | { | |
1657 | if (!head) | |
1658 | return; | |
1659 | spin_lock(&sysctl_lock); | |
1660 | unuse_table(head); | |
1661 | spin_unlock(&sysctl_lock); | |
1662 | } | |
1663 | ||
73455092 AV |
1664 | static struct ctl_table_set * |
1665 | lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces) | |
1666 | { | |
1667 | struct ctl_table_set *set = &root->default_set; | |
1668 | if (root->lookup) | |
1669 | set = root->lookup(root, namespaces); | |
1670 | return set; | |
1671 | } | |
1672 | ||
e51b6ba0 EB |
1673 | static struct list_head * |
1674 | lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces) | |
805b5d5e | 1675 | { |
73455092 AV |
1676 | struct ctl_table_set *set = lookup_header_set(root, namespaces); |
1677 | return &set->list; | |
e51b6ba0 EB |
1678 | } |
1679 | ||
1680 | struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces, | |
1681 | struct ctl_table_header *prev) | |
1682 | { | |
1683 | struct ctl_table_root *root; | |
1684 | struct list_head *header_list; | |
805b5d5e EB |
1685 | struct ctl_table_header *head; |
1686 | struct list_head *tmp; | |
e51b6ba0 | 1687 | |
805b5d5e EB |
1688 | spin_lock(&sysctl_lock); |
1689 | if (prev) { | |
e51b6ba0 | 1690 | head = prev; |
805b5d5e EB |
1691 | tmp = &prev->ctl_entry; |
1692 | unuse_table(prev); | |
1693 | goto next; | |
1694 | } | |
1695 | tmp = &root_table_header.ctl_entry; | |
1696 | for (;;) { | |
1697 | head = list_entry(tmp, struct ctl_table_header, ctl_entry); | |
1698 | ||
1699 | if (!use_table(head)) | |
1700 | goto next; | |
1701 | spin_unlock(&sysctl_lock); | |
1702 | return head; | |
1703 | next: | |
e51b6ba0 | 1704 | root = head->root; |
805b5d5e | 1705 | tmp = tmp->next; |
e51b6ba0 EB |
1706 | header_list = lookup_header_list(root, namespaces); |
1707 | if (tmp != header_list) | |
1708 | continue; | |
1709 | ||
1710 | do { | |
1711 | root = list_entry(root->root_list.next, | |
1712 | struct ctl_table_root, root_list); | |
1713 | if (root == &sysctl_table_root) | |
1714 | goto out; | |
1715 | header_list = lookup_header_list(root, namespaces); | |
1716 | } while (list_empty(header_list)); | |
1717 | tmp = header_list->next; | |
805b5d5e | 1718 | } |
e51b6ba0 | 1719 | out: |
805b5d5e EB |
1720 | spin_unlock(&sysctl_lock); |
1721 | return NULL; | |
1722 | } | |
1723 | ||
e51b6ba0 EB |
1724 | struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev) |
1725 | { | |
1726 | return __sysctl_head_next(current->nsproxy, prev); | |
1727 | } | |
1728 | ||
1729 | void register_sysctl_root(struct ctl_table_root *root) | |
1730 | { | |
1731 | spin_lock(&sysctl_lock); | |
1732 | list_add_tail(&root->root_list, &sysctl_table_root.root_list); | |
1733 | spin_unlock(&sysctl_lock); | |
1734 | } | |
1735 | ||
b89a8171 | 1736 | #ifdef CONFIG_SYSCTL_SYSCALL |
2c4c7155 | 1737 | /* Perform the actual read/write of a sysctl table entry. */ |
d7321cd6 PE |
1738 | static int do_sysctl_strategy(struct ctl_table_root *root, |
1739 | struct ctl_table *table, | |
2c4c7155 PE |
1740 | void __user *oldval, size_t __user *oldlenp, |
1741 | void __user *newval, size_t newlen) | |
1742 | { | |
1743 | int op = 0, rc; | |
1744 | ||
1745 | if (oldval) | |
e6305c43 | 1746 | op |= MAY_READ; |
2c4c7155 | 1747 | if (newval) |
e6305c43 | 1748 | op |= MAY_WRITE; |
d7321cd6 | 1749 | if (sysctl_perm(root, table, op)) |
2c4c7155 PE |
1750 | return -EPERM; |
1751 | ||
1752 | if (table->strategy) { | |
f221e726 | 1753 | rc = table->strategy(table, oldval, oldlenp, newval, newlen); |
2c4c7155 PE |
1754 | if (rc < 0) |
1755 | return rc; | |
1756 | if (rc > 0) | |
1757 | return 0; | |
1758 | } | |
1759 | ||
1760 | /* If there is no strategy routine, or if the strategy returns | |
1761 | * zero, proceed with automatic r/w */ | |
1762 | if (table->data && table->maxlen) { | |
f221e726 | 1763 | rc = sysctl_data(table, oldval, oldlenp, newval, newlen); |
2c4c7155 PE |
1764 | if (rc < 0) |
1765 | return rc; | |
1766 | } | |
1767 | return 0; | |
1768 | } | |
1769 | ||
1770 | static int parse_table(int __user *name, int nlen, | |
1771 | void __user *oldval, size_t __user *oldlenp, | |
1772 | void __user *newval, size_t newlen, | |
d7321cd6 | 1773 | struct ctl_table_root *root, |
2c4c7155 PE |
1774 | struct ctl_table *table) |
1775 | { | |
1776 | int n; | |
1777 | repeat: | |
1778 | if (!nlen) | |
1779 | return -ENOTDIR; | |
1780 | if (get_user(n, name)) | |
1781 | return -EFAULT; | |
1782 | for ( ; table->ctl_name || table->procname; table++) { | |
1783 | if (!table->ctl_name) | |
1784 | continue; | |
1785 | if (n == table->ctl_name) { | |
1786 | int error; | |
1787 | if (table->child) { | |
e6305c43 | 1788 | if (sysctl_perm(root, table, MAY_EXEC)) |
2c4c7155 PE |
1789 | return -EPERM; |
1790 | name++; | |
1791 | nlen--; | |
1792 | table = table->child; | |
1793 | goto repeat; | |
1794 | } | |
f221e726 | 1795 | error = do_sysctl_strategy(root, table, |
2c4c7155 PE |
1796 | oldval, oldlenp, |
1797 | newval, newlen); | |
1798 | return error; | |
1799 | } | |
1800 | } | |
1801 | return -ENOTDIR; | |
1802 | } | |
1803 | ||
1da177e4 LT |
1804 | int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *oldlenp, |
1805 | void __user *newval, size_t newlen) | |
1806 | { | |
805b5d5e | 1807 | struct ctl_table_header *head; |
330d57fb | 1808 | int error = -ENOTDIR; |
1da177e4 LT |
1809 | |
1810 | if (nlen <= 0 || nlen >= CTL_MAXNAME) | |
1811 | return -ENOTDIR; | |
1812 | if (oldval) { | |
1813 | int old_len; | |
1814 | if (!oldlenp || get_user(old_len, oldlenp)) | |
1815 | return -EFAULT; | |
1816 | } | |
330d57fb | 1817 | |
805b5d5e EB |
1818 | for (head = sysctl_head_next(NULL); head; |
1819 | head = sysctl_head_next(head)) { | |
330d57fb | 1820 | error = parse_table(name, nlen, oldval, oldlenp, |
d7321cd6 PE |
1821 | newval, newlen, |
1822 | head->root, head->ctl_table); | |
805b5d5e EB |
1823 | if (error != -ENOTDIR) { |
1824 | sysctl_head_finish(head); | |
330d57fb | 1825 | break; |
805b5d5e EB |
1826 | } |
1827 | } | |
330d57fb | 1828 | return error; |
1da177e4 LT |
1829 | } |
1830 | ||
1e7bfb21 | 1831 | SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args) |
1da177e4 LT |
1832 | { |
1833 | struct __sysctl_args tmp; | |
1834 | int error; | |
1835 | ||
1836 | if (copy_from_user(&tmp, args, sizeof(tmp))) | |
1837 | return -EFAULT; | |
1838 | ||
7058cb02 EB |
1839 | error = deprecated_sysctl_warning(&tmp); |
1840 | if (error) | |
1841 | goto out; | |
1842 | ||
1da177e4 LT |
1843 | lock_kernel(); |
1844 | error = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, tmp.oldlenp, | |
1845 | tmp.newval, tmp.newlen); | |
1846 | unlock_kernel(); | |
7058cb02 | 1847 | out: |
1da177e4 LT |
1848 | return error; |
1849 | } | |
b89a8171 | 1850 | #endif /* CONFIG_SYSCTL_SYSCALL */ |
1da177e4 LT |
1851 | |
1852 | /* | |
1ff007eb | 1853 | * sysctl_perm does NOT grant the superuser all rights automatically, because |
1da177e4 LT |
1854 | * some sysctl variables are readonly even to root. |
1855 | */ | |
1856 | ||
1857 | static int test_perm(int mode, int op) | |
1858 | { | |
76aac0e9 | 1859 | if (!current_euid()) |
1da177e4 LT |
1860 | mode >>= 6; |
1861 | else if (in_egroup_p(0)) | |
1862 | mode >>= 3; | |
e6305c43 | 1863 | if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0) |
1da177e4 LT |
1864 | return 0; |
1865 | return -EACCES; | |
1866 | } | |
1867 | ||
d7321cd6 | 1868 | int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op) |
1da177e4 LT |
1869 | { |
1870 | int error; | |
d7321cd6 PE |
1871 | int mode; |
1872 | ||
e6305c43 | 1873 | error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC)); |
1da177e4 LT |
1874 | if (error) |
1875 | return error; | |
d7321cd6 PE |
1876 | |
1877 | if (root->permissions) | |
1878 | mode = root->permissions(root, current->nsproxy, table); | |
1879 | else | |
1880 | mode = table->mode; | |
1881 | ||
1882 | return test_perm(mode, op); | |
1da177e4 LT |
1883 | } |
1884 | ||
d912b0cc EB |
1885 | static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table) |
1886 | { | |
1887 | for (; table->ctl_name || table->procname; table++) { | |
1888 | table->parent = parent; | |
1889 | if (table->child) | |
1890 | sysctl_set_parent(table, table->child); | |
1891 | } | |
1892 | } | |
1893 | ||
1894 | static __init int sysctl_init(void) | |
1895 | { | |
1896 | sysctl_set_parent(NULL, root_table); | |
88f458e4 HS |
1897 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
1898 | { | |
1899 | int err; | |
1900 | err = sysctl_check_table(current->nsproxy, root_table); | |
1901 | } | |
1902 | #endif | |
d912b0cc EB |
1903 | return 0; |
1904 | } | |
1905 | ||
1906 | core_initcall(sysctl_init); | |
1907 | ||
bfbcf034 AV |
1908 | static struct ctl_table *is_branch_in(struct ctl_table *branch, |
1909 | struct ctl_table *table) | |
ae7edecc AV |
1910 | { |
1911 | struct ctl_table *p; | |
1912 | const char *s = branch->procname; | |
1913 | ||
1914 | /* branch should have named subdirectory as its first element */ | |
1915 | if (!s || !branch->child) | |
bfbcf034 | 1916 | return NULL; |
ae7edecc AV |
1917 | |
1918 | /* ... and nothing else */ | |
1919 | if (branch[1].procname || branch[1].ctl_name) | |
bfbcf034 | 1920 | return NULL; |
ae7edecc AV |
1921 | |
1922 | /* table should contain subdirectory with the same name */ | |
1923 | for (p = table; p->procname || p->ctl_name; p++) { | |
1924 | if (!p->child) | |
1925 | continue; | |
1926 | if (p->procname && strcmp(p->procname, s) == 0) | |
bfbcf034 | 1927 | return p; |
ae7edecc | 1928 | } |
bfbcf034 | 1929 | return NULL; |
ae7edecc AV |
1930 | } |
1931 | ||
1932 | /* see if attaching q to p would be an improvement */ | |
1933 | static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q) | |
1934 | { | |
1935 | struct ctl_table *to = p->ctl_table, *by = q->ctl_table; | |
bfbcf034 | 1936 | struct ctl_table *next; |
ae7edecc AV |
1937 | int is_better = 0; |
1938 | int not_in_parent = !p->attached_by; | |
1939 | ||
bfbcf034 | 1940 | while ((next = is_branch_in(by, to)) != NULL) { |
ae7edecc AV |
1941 | if (by == q->attached_by) |
1942 | is_better = 1; | |
1943 | if (to == p->attached_by) | |
1944 | not_in_parent = 1; | |
1945 | by = by->child; | |
bfbcf034 | 1946 | to = next->child; |
ae7edecc AV |
1947 | } |
1948 | ||
1949 | if (is_better && not_in_parent) { | |
1950 | q->attached_by = by; | |
1951 | q->attached_to = to; | |
1952 | q->parent = p; | |
1953 | } | |
1954 | } | |
1955 | ||
1da177e4 | 1956 | /** |
e51b6ba0 EB |
1957 | * __register_sysctl_paths - register a sysctl hierarchy |
1958 | * @root: List of sysctl headers to register on | |
1959 | * @namespaces: Data to compute which lists of sysctl entries are visible | |
29e796fd | 1960 | * @path: The path to the directory the sysctl table is in. |
1da177e4 | 1961 | * @table: the top-level table structure |
1da177e4 LT |
1962 | * |
1963 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
29e796fd | 1964 | * array. A completely 0 filled entry terminates the table. |
1da177e4 | 1965 | * |
d8217f07 | 1966 | * The members of the &struct ctl_table structure are used as follows: |
1da177e4 LT |
1967 | * |
1968 | * ctl_name - This is the numeric sysctl value used by sysctl(2). The number | |
1969 | * must be unique within that level of sysctl | |
1970 | * | |
1971 | * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not | |
1972 | * enter a sysctl file | |
1973 | * | |
1974 | * data - a pointer to data for use by proc_handler | |
1975 | * | |
1976 | * maxlen - the maximum size in bytes of the data | |
1977 | * | |
1978 | * mode - the file permissions for the /proc/sys file, and for sysctl(2) | |
1979 | * | |
1980 | * child - a pointer to the child sysctl table if this entry is a directory, or | |
1981 | * %NULL. | |
1982 | * | |
1983 | * proc_handler - the text handler routine (described below) | |
1984 | * | |
1985 | * strategy - the strategy routine (described below) | |
1986 | * | |
1987 | * de - for internal use by the sysctl routines | |
1988 | * | |
1989 | * extra1, extra2 - extra pointers usable by the proc handler routines | |
1990 | * | |
1991 | * Leaf nodes in the sysctl tree will be represented by a single file | |
1992 | * under /proc; non-leaf nodes will be represented by directories. | |
1993 | * | |
1994 | * sysctl(2) can automatically manage read and write requests through | |
1995 | * the sysctl table. The data and maxlen fields of the ctl_table | |
1996 | * struct enable minimal validation of the values being written to be | |
1997 | * performed, and the mode field allows minimal authentication. | |
1998 | * | |
1999 | * More sophisticated management can be enabled by the provision of a | |
2000 | * strategy routine with the table entry. This will be called before | |
2001 | * any automatic read or write of the data is performed. | |
2002 | * | |
2003 | * The strategy routine may return | |
2004 | * | |
2005 | * < 0 - Error occurred (error is passed to user process) | |
2006 | * | |
2007 | * 0 - OK - proceed with automatic read or write. | |
2008 | * | |
2009 | * > 0 - OK - read or write has been done by the strategy routine, so | |
2010 | * return immediately. | |
2011 | * | |
2012 | * There must be a proc_handler routine for any terminal nodes | |
2013 | * mirrored under /proc/sys (non-terminals are handled by a built-in | |
2014 | * directory handler). Several default handlers are available to | |
2015 | * cover common cases - | |
2016 | * | |
2017 | * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(), | |
2018 | * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(), | |
2019 | * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax() | |
2020 | * | |
2021 | * It is the handler's job to read the input buffer from user memory | |
2022 | * and process it. The handler should return 0 on success. | |
2023 | * | |
2024 | * This routine returns %NULL on a failure to register, and a pointer | |
2025 | * to the table header on success. | |
2026 | */ | |
e51b6ba0 EB |
2027 | struct ctl_table_header *__register_sysctl_paths( |
2028 | struct ctl_table_root *root, | |
2029 | struct nsproxy *namespaces, | |
2030 | const struct ctl_path *path, struct ctl_table *table) | |
1da177e4 | 2031 | { |
29e796fd EB |
2032 | struct ctl_table_header *header; |
2033 | struct ctl_table *new, **prevp; | |
2034 | unsigned int n, npath; | |
ae7edecc | 2035 | struct ctl_table_set *set; |
29e796fd EB |
2036 | |
2037 | /* Count the path components */ | |
2038 | for (npath = 0; path[npath].ctl_name || path[npath].procname; ++npath) | |
2039 | ; | |
2040 | ||
2041 | /* | |
2042 | * For each path component, allocate a 2-element ctl_table array. | |
2043 | * The first array element will be filled with the sysctl entry | |
2044 | * for this, the second will be the sentinel (ctl_name == 0). | |
2045 | * | |
2046 | * We allocate everything in one go so that we don't have to | |
2047 | * worry about freeing additional memory in unregister_sysctl_table. | |
2048 | */ | |
2049 | header = kzalloc(sizeof(struct ctl_table_header) + | |
2050 | (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL); | |
2051 | if (!header) | |
1da177e4 | 2052 | return NULL; |
29e796fd EB |
2053 | |
2054 | new = (struct ctl_table *) (header + 1); | |
2055 | ||
2056 | /* Now connect the dots */ | |
2057 | prevp = &header->ctl_table; | |
2058 | for (n = 0; n < npath; ++n, ++path) { | |
2059 | /* Copy the procname */ | |
2060 | new->procname = path->procname; | |
2061 | new->ctl_name = path->ctl_name; | |
2062 | new->mode = 0555; | |
2063 | ||
2064 | *prevp = new; | |
2065 | prevp = &new->child; | |
2066 | ||
2067 | new += 2; | |
2068 | } | |
2069 | *prevp = table; | |
23eb06de | 2070 | header->ctl_table_arg = table; |
29e796fd EB |
2071 | |
2072 | INIT_LIST_HEAD(&header->ctl_entry); | |
2073 | header->used = 0; | |
2074 | header->unregistering = NULL; | |
e51b6ba0 | 2075 | header->root = root; |
29e796fd | 2076 | sysctl_set_parent(NULL, header->ctl_table); |
f7e6ced4 | 2077 | header->count = 1; |
88f458e4 | 2078 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
e51b6ba0 | 2079 | if (sysctl_check_table(namespaces, header->ctl_table)) { |
29e796fd | 2080 | kfree(header); |
fc6cd25b EB |
2081 | return NULL; |
2082 | } | |
88f458e4 | 2083 | #endif |
330d57fb | 2084 | spin_lock(&sysctl_lock); |
73455092 | 2085 | header->set = lookup_header_set(root, namespaces); |
ae7edecc AV |
2086 | header->attached_by = header->ctl_table; |
2087 | header->attached_to = root_table; | |
2088 | header->parent = &root_table_header; | |
2089 | for (set = header->set; set; set = set->parent) { | |
2090 | struct ctl_table_header *p; | |
2091 | list_for_each_entry(p, &set->list, ctl_entry) { | |
2092 | if (p->unregistering) | |
2093 | continue; | |
2094 | try_attach(p, header); | |
2095 | } | |
2096 | } | |
2097 | header->parent->count++; | |
73455092 | 2098 | list_add_tail(&header->ctl_entry, &header->set->list); |
330d57fb | 2099 | spin_unlock(&sysctl_lock); |
29e796fd EB |
2100 | |
2101 | return header; | |
2102 | } | |
2103 | ||
e51b6ba0 EB |
2104 | /** |
2105 | * register_sysctl_table_path - register a sysctl table hierarchy | |
2106 | * @path: The path to the directory the sysctl table is in. | |
2107 | * @table: the top-level table structure | |
2108 | * | |
2109 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
2110 | * array. A completely 0 filled entry terminates the table. | |
2111 | * | |
2112 | * See __register_sysctl_paths for more details. | |
2113 | */ | |
2114 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, | |
2115 | struct ctl_table *table) | |
2116 | { | |
2117 | return __register_sysctl_paths(&sysctl_table_root, current->nsproxy, | |
2118 | path, table); | |
2119 | } | |
2120 | ||
29e796fd EB |
2121 | /** |
2122 | * register_sysctl_table - register a sysctl table hierarchy | |
2123 | * @table: the top-level table structure | |
2124 | * | |
2125 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
2126 | * array. A completely 0 filled entry terminates the table. | |
2127 | * | |
2128 | * See register_sysctl_paths for more details. | |
2129 | */ | |
2130 | struct ctl_table_header *register_sysctl_table(struct ctl_table *table) | |
2131 | { | |
2132 | static const struct ctl_path null_path[] = { {} }; | |
2133 | ||
2134 | return register_sysctl_paths(null_path, table); | |
1da177e4 LT |
2135 | } |
2136 | ||
2137 | /** | |
2138 | * unregister_sysctl_table - unregister a sysctl table hierarchy | |
2139 | * @header: the header returned from register_sysctl_table | |
2140 | * | |
2141 | * Unregisters the sysctl table and all children. proc entries may not | |
2142 | * actually be removed until they are no longer used by anyone. | |
2143 | */ | |
2144 | void unregister_sysctl_table(struct ctl_table_header * header) | |
2145 | { | |
330d57fb | 2146 | might_sleep(); |
f1dad166 PE |
2147 | |
2148 | if (header == NULL) | |
2149 | return; | |
2150 | ||
330d57fb AV |
2151 | spin_lock(&sysctl_lock); |
2152 | start_unregistering(header); | |
ae7edecc AV |
2153 | if (!--header->parent->count) { |
2154 | WARN_ON(1); | |
2155 | kfree(header->parent); | |
2156 | } | |
f7e6ced4 AV |
2157 | if (!--header->count) |
2158 | kfree(header); | |
330d57fb | 2159 | spin_unlock(&sysctl_lock); |
1da177e4 LT |
2160 | } |
2161 | ||
9043476f AV |
2162 | int sysctl_is_seen(struct ctl_table_header *p) |
2163 | { | |
2164 | struct ctl_table_set *set = p->set; | |
2165 | int res; | |
2166 | spin_lock(&sysctl_lock); | |
2167 | if (p->unregistering) | |
2168 | res = 0; | |
2169 | else if (!set->is_seen) | |
2170 | res = 1; | |
2171 | else | |
2172 | res = set->is_seen(set); | |
2173 | spin_unlock(&sysctl_lock); | |
2174 | return res; | |
2175 | } | |
2176 | ||
73455092 AV |
2177 | void setup_sysctl_set(struct ctl_table_set *p, |
2178 | struct ctl_table_set *parent, | |
2179 | int (*is_seen)(struct ctl_table_set *)) | |
2180 | { | |
2181 | INIT_LIST_HEAD(&p->list); | |
2182 | p->parent = parent ? parent : &sysctl_table_root.default_set; | |
2183 | p->is_seen = is_seen; | |
2184 | } | |
2185 | ||
b89a8171 | 2186 | #else /* !CONFIG_SYSCTL */ |
d8217f07 | 2187 | struct ctl_table_header *register_sysctl_table(struct ctl_table * table) |
b89a8171 EB |
2188 | { |
2189 | return NULL; | |
2190 | } | |
2191 | ||
29e796fd EB |
2192 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, |
2193 | struct ctl_table *table) | |
2194 | { | |
2195 | return NULL; | |
2196 | } | |
2197 | ||
b89a8171 EB |
2198 | void unregister_sysctl_table(struct ctl_table_header * table) |
2199 | { | |
2200 | } | |
2201 | ||
73455092 AV |
2202 | void setup_sysctl_set(struct ctl_table_set *p, |
2203 | struct ctl_table_set *parent, | |
2204 | int (*is_seen)(struct ctl_table_set *)) | |
2205 | { | |
2206 | } | |
2207 | ||
f7e6ced4 AV |
2208 | void sysctl_head_put(struct ctl_table_header *head) |
2209 | { | |
2210 | } | |
2211 | ||
b89a8171 EB |
2212 | #endif /* CONFIG_SYSCTL */ |
2213 | ||
1da177e4 LT |
2214 | /* |
2215 | * /proc/sys support | |
2216 | */ | |
2217 | ||
b89a8171 | 2218 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 2219 | |
b1ba4ddd AB |
2220 | static int _proc_do_string(void* data, int maxlen, int write, |
2221 | struct file *filp, void __user *buffer, | |
2222 | size_t *lenp, loff_t *ppos) | |
1da177e4 LT |
2223 | { |
2224 | size_t len; | |
2225 | char __user *p; | |
2226 | char c; | |
8d060877 ON |
2227 | |
2228 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
2229 | *lenp = 0; |
2230 | return 0; | |
2231 | } | |
8d060877 | 2232 | |
1da177e4 LT |
2233 | if (write) { |
2234 | len = 0; | |
2235 | p = buffer; | |
2236 | while (len < *lenp) { | |
2237 | if (get_user(c, p++)) | |
2238 | return -EFAULT; | |
2239 | if (c == 0 || c == '\n') | |
2240 | break; | |
2241 | len++; | |
2242 | } | |
f5dd3d6f SV |
2243 | if (len >= maxlen) |
2244 | len = maxlen-1; | |
2245 | if(copy_from_user(data, buffer, len)) | |
1da177e4 | 2246 | return -EFAULT; |
f5dd3d6f | 2247 | ((char *) data)[len] = 0; |
1da177e4 LT |
2248 | *ppos += *lenp; |
2249 | } else { | |
f5dd3d6f SV |
2250 | len = strlen(data); |
2251 | if (len > maxlen) | |
2252 | len = maxlen; | |
8d060877 ON |
2253 | |
2254 | if (*ppos > len) { | |
2255 | *lenp = 0; | |
2256 | return 0; | |
2257 | } | |
2258 | ||
2259 | data += *ppos; | |
2260 | len -= *ppos; | |
2261 | ||
1da177e4 LT |
2262 | if (len > *lenp) |
2263 | len = *lenp; | |
2264 | if (len) | |
f5dd3d6f | 2265 | if(copy_to_user(buffer, data, len)) |
1da177e4 LT |
2266 | return -EFAULT; |
2267 | if (len < *lenp) { | |
2268 | if(put_user('\n', ((char __user *) buffer) + len)) | |
2269 | return -EFAULT; | |
2270 | len++; | |
2271 | } | |
2272 | *lenp = len; | |
2273 | *ppos += len; | |
2274 | } | |
2275 | return 0; | |
2276 | } | |
2277 | ||
f5dd3d6f SV |
2278 | /** |
2279 | * proc_dostring - read a string sysctl | |
2280 | * @table: the sysctl table | |
2281 | * @write: %TRUE if this is a write to the sysctl file | |
2282 | * @filp: the file structure | |
2283 | * @buffer: the user buffer | |
2284 | * @lenp: the size of the user buffer | |
2285 | * @ppos: file position | |
2286 | * | |
2287 | * Reads/writes a string from/to the user buffer. If the kernel | |
2288 | * buffer provided is not large enough to hold the string, the | |
2289 | * string is truncated. The copied string is %NULL-terminated. | |
2290 | * If the string is being read by the user process, it is copied | |
2291 | * and a newline '\n' is added. It is truncated if the buffer is | |
2292 | * not large enough. | |
2293 | * | |
2294 | * Returns 0 on success. | |
2295 | */ | |
d8217f07 | 2296 | int proc_dostring(struct ctl_table *table, int write, struct file *filp, |
f5dd3d6f SV |
2297 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2298 | { | |
2299 | return _proc_do_string(table->data, table->maxlen, write, filp, | |
2300 | buffer, lenp, ppos); | |
2301 | } | |
2302 | ||
1da177e4 LT |
2303 | |
2304 | static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp, | |
2305 | int *valp, | |
2306 | int write, void *data) | |
2307 | { | |
2308 | if (write) { | |
2309 | *valp = *negp ? -*lvalp : *lvalp; | |
2310 | } else { | |
2311 | int val = *valp; | |
2312 | if (val < 0) { | |
2313 | *negp = -1; | |
2314 | *lvalp = (unsigned long)-val; | |
2315 | } else { | |
2316 | *negp = 0; | |
2317 | *lvalp = (unsigned long)val; | |
2318 | } | |
2319 | } | |
2320 | return 0; | |
2321 | } | |
2322 | ||
d8217f07 | 2323 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
fcfbd547 KK |
2324 | int write, struct file *filp, void __user *buffer, |
2325 | size_t *lenp, loff_t *ppos, | |
1da177e4 LT |
2326 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, |
2327 | int write, void *data), | |
2328 | void *data) | |
2329 | { | |
2330 | #define TMPBUFLEN 21 | |
7338f299 | 2331 | int *i, vleft, first = 1, neg; |
1da177e4 LT |
2332 | unsigned long lval; |
2333 | size_t left, len; | |
2334 | ||
2335 | char buf[TMPBUFLEN], *p; | |
2336 | char __user *s = buffer; | |
2337 | ||
fcfbd547 | 2338 | if (!tbl_data || !table->maxlen || !*lenp || |
1da177e4 LT |
2339 | (*ppos && !write)) { |
2340 | *lenp = 0; | |
2341 | return 0; | |
2342 | } | |
2343 | ||
fcfbd547 | 2344 | i = (int *) tbl_data; |
1da177e4 LT |
2345 | vleft = table->maxlen / sizeof(*i); |
2346 | left = *lenp; | |
2347 | ||
2348 | if (!conv) | |
2349 | conv = do_proc_dointvec_conv; | |
2350 | ||
2351 | for (; left && vleft--; i++, first=0) { | |
2352 | if (write) { | |
2353 | while (left) { | |
2354 | char c; | |
2355 | if (get_user(c, s)) | |
2356 | return -EFAULT; | |
2357 | if (!isspace(c)) | |
2358 | break; | |
2359 | left--; | |
2360 | s++; | |
2361 | } | |
2362 | if (!left) | |
2363 | break; | |
2364 | neg = 0; | |
2365 | len = left; | |
2366 | if (len > sizeof(buf) - 1) | |
2367 | len = sizeof(buf) - 1; | |
2368 | if (copy_from_user(buf, s, len)) | |
2369 | return -EFAULT; | |
2370 | buf[len] = 0; | |
2371 | p = buf; | |
2372 | if (*p == '-' && left > 1) { | |
2373 | neg = 1; | |
bd9b0bac | 2374 | p++; |
1da177e4 LT |
2375 | } |
2376 | if (*p < '0' || *p > '9') | |
2377 | break; | |
2378 | ||
2379 | lval = simple_strtoul(p, &p, 0); | |
2380 | ||
2381 | len = p-buf; | |
2382 | if ((len < left) && *p && !isspace(*p)) | |
2383 | break; | |
1da177e4 LT |
2384 | s += len; |
2385 | left -= len; | |
2386 | ||
2387 | if (conv(&neg, &lval, i, 1, data)) | |
2388 | break; | |
2389 | } else { | |
2390 | p = buf; | |
2391 | if (!first) | |
2392 | *p++ = '\t'; | |
2393 | ||
2394 | if (conv(&neg, &lval, i, 0, data)) | |
2395 | break; | |
2396 | ||
2397 | sprintf(p, "%s%lu", neg ? "-" : "", lval); | |
2398 | len = strlen(buf); | |
2399 | if (len > left) | |
2400 | len = left; | |
2401 | if(copy_to_user(s, buf, len)) | |
2402 | return -EFAULT; | |
2403 | left -= len; | |
2404 | s += len; | |
2405 | } | |
2406 | } | |
2407 | ||
2408 | if (!write && !first && left) { | |
2409 | if(put_user('\n', s)) | |
2410 | return -EFAULT; | |
2411 | left--, s++; | |
2412 | } | |
2413 | if (write) { | |
2414 | while (left) { | |
2415 | char c; | |
2416 | if (get_user(c, s++)) | |
2417 | return -EFAULT; | |
2418 | if (!isspace(c)) | |
2419 | break; | |
2420 | left--; | |
2421 | } | |
2422 | } | |
2423 | if (write && first) | |
2424 | return -EINVAL; | |
2425 | *lenp -= left; | |
2426 | *ppos += *lenp; | |
2427 | return 0; | |
2428 | #undef TMPBUFLEN | |
2429 | } | |
2430 | ||
d8217f07 | 2431 | static int do_proc_dointvec(struct ctl_table *table, int write, struct file *filp, |
fcfbd547 KK |
2432 | void __user *buffer, size_t *lenp, loff_t *ppos, |
2433 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, | |
2434 | int write, void *data), | |
2435 | void *data) | |
2436 | { | |
2437 | return __do_proc_dointvec(table->data, table, write, filp, | |
2438 | buffer, lenp, ppos, conv, data); | |
2439 | } | |
2440 | ||
1da177e4 LT |
2441 | /** |
2442 | * proc_dointvec - read a vector of integers | |
2443 | * @table: the sysctl table | |
2444 | * @write: %TRUE if this is a write to the sysctl file | |
2445 | * @filp: the file structure | |
2446 | * @buffer: the user buffer | |
2447 | * @lenp: the size of the user buffer | |
2448 | * @ppos: file position | |
2449 | * | |
2450 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2451 | * values from/to the user buffer, treated as an ASCII string. | |
2452 | * | |
2453 | * Returns 0 on success. | |
2454 | */ | |
d8217f07 | 2455 | int proc_dointvec(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2456 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2457 | { | |
2458 | return do_proc_dointvec(table,write,filp,buffer,lenp,ppos, | |
2459 | NULL,NULL); | |
2460 | } | |
2461 | ||
34f5a398 | 2462 | /* |
25ddbb18 AK |
2463 | * Taint values can only be increased |
2464 | * This means we can safely use a temporary. | |
34f5a398 | 2465 | */ |
25ddbb18 | 2466 | static int proc_taint(struct ctl_table *table, int write, struct file *filp, |
34f5a398 TT |
2467 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2468 | { | |
25ddbb18 AK |
2469 | struct ctl_table t; |
2470 | unsigned long tmptaint = get_taint(); | |
2471 | int err; | |
34f5a398 | 2472 | |
91fcd412 | 2473 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2474 | return -EPERM; |
2475 | ||
25ddbb18 AK |
2476 | t = *table; |
2477 | t.data = &tmptaint; | |
2478 | err = proc_doulongvec_minmax(&t, write, filp, buffer, lenp, ppos); | |
2479 | if (err < 0) | |
2480 | return err; | |
2481 | ||
2482 | if (write) { | |
2483 | /* | |
2484 | * Poor man's atomic or. Not worth adding a primitive | |
2485 | * to everyone's atomic.h for this | |
2486 | */ | |
2487 | int i; | |
2488 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2489 | if ((tmptaint >> i) & 1) | |
2490 | add_taint(i); | |
2491 | } | |
2492 | } | |
2493 | ||
2494 | return err; | |
34f5a398 TT |
2495 | } |
2496 | ||
1da177e4 LT |
2497 | struct do_proc_dointvec_minmax_conv_param { |
2498 | int *min; | |
2499 | int *max; | |
2500 | }; | |
2501 | ||
2502 | static int do_proc_dointvec_minmax_conv(int *negp, unsigned long *lvalp, | |
2503 | int *valp, | |
2504 | int write, void *data) | |
2505 | { | |
2506 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2507 | if (write) { | |
2508 | int val = *negp ? -*lvalp : *lvalp; | |
2509 | if ((param->min && *param->min > val) || | |
2510 | (param->max && *param->max < val)) | |
2511 | return -EINVAL; | |
2512 | *valp = val; | |
2513 | } else { | |
2514 | int val = *valp; | |
2515 | if (val < 0) { | |
2516 | *negp = -1; | |
2517 | *lvalp = (unsigned long)-val; | |
2518 | } else { | |
2519 | *negp = 0; | |
2520 | *lvalp = (unsigned long)val; | |
2521 | } | |
2522 | } | |
2523 | return 0; | |
2524 | } | |
2525 | ||
2526 | /** | |
2527 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2528 | * @table: the sysctl table | |
2529 | * @write: %TRUE if this is a write to the sysctl file | |
2530 | * @filp: the file structure | |
2531 | * @buffer: the user buffer | |
2532 | * @lenp: the size of the user buffer | |
2533 | * @ppos: file position | |
2534 | * | |
2535 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2536 | * values from/to the user buffer, treated as an ASCII string. | |
2537 | * | |
2538 | * This routine will ensure the values are within the range specified by | |
2539 | * table->extra1 (min) and table->extra2 (max). | |
2540 | * | |
2541 | * Returns 0 on success. | |
2542 | */ | |
d8217f07 | 2543 | int proc_dointvec_minmax(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2544 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2545 | { | |
2546 | struct do_proc_dointvec_minmax_conv_param param = { | |
2547 | .min = (int *) table->extra1, | |
2548 | .max = (int *) table->extra2, | |
2549 | }; | |
2550 | return do_proc_dointvec(table, write, filp, buffer, lenp, ppos, | |
2551 | do_proc_dointvec_minmax_conv, ¶m); | |
2552 | } | |
2553 | ||
d8217f07 | 2554 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2555 | struct file *filp, |
2556 | void __user *buffer, | |
2557 | size_t *lenp, loff_t *ppos, | |
2558 | unsigned long convmul, | |
2559 | unsigned long convdiv) | |
2560 | { | |
2561 | #define TMPBUFLEN 21 | |
2562 | unsigned long *i, *min, *max, val; | |
2563 | int vleft, first=1, neg; | |
2564 | size_t len, left; | |
2565 | char buf[TMPBUFLEN], *p; | |
2566 | char __user *s = buffer; | |
2567 | ||
fcfbd547 | 2568 | if (!data || !table->maxlen || !*lenp || |
1da177e4 LT |
2569 | (*ppos && !write)) { |
2570 | *lenp = 0; | |
2571 | return 0; | |
2572 | } | |
2573 | ||
fcfbd547 | 2574 | i = (unsigned long *) data; |
1da177e4 LT |
2575 | min = (unsigned long *) table->extra1; |
2576 | max = (unsigned long *) table->extra2; | |
2577 | vleft = table->maxlen / sizeof(unsigned long); | |
2578 | left = *lenp; | |
2579 | ||
2580 | for (; left && vleft--; i++, min++, max++, first=0) { | |
2581 | if (write) { | |
2582 | while (left) { | |
2583 | char c; | |
2584 | if (get_user(c, s)) | |
2585 | return -EFAULT; | |
2586 | if (!isspace(c)) | |
2587 | break; | |
2588 | left--; | |
2589 | s++; | |
2590 | } | |
2591 | if (!left) | |
2592 | break; | |
2593 | neg = 0; | |
2594 | len = left; | |
2595 | if (len > TMPBUFLEN-1) | |
2596 | len = TMPBUFLEN-1; | |
2597 | if (copy_from_user(buf, s, len)) | |
2598 | return -EFAULT; | |
2599 | buf[len] = 0; | |
2600 | p = buf; | |
2601 | if (*p == '-' && left > 1) { | |
2602 | neg = 1; | |
bd9b0bac | 2603 | p++; |
1da177e4 LT |
2604 | } |
2605 | if (*p < '0' || *p > '9') | |
2606 | break; | |
2607 | val = simple_strtoul(p, &p, 0) * convmul / convdiv ; | |
2608 | len = p-buf; | |
2609 | if ((len < left) && *p && !isspace(*p)) | |
2610 | break; | |
2611 | if (neg) | |
2612 | val = -val; | |
2613 | s += len; | |
2614 | left -= len; | |
2615 | ||
2616 | if(neg) | |
2617 | continue; | |
2618 | if ((min && val < *min) || (max && val > *max)) | |
2619 | continue; | |
2620 | *i = val; | |
2621 | } else { | |
2622 | p = buf; | |
2623 | if (!first) | |
2624 | *p++ = '\t'; | |
2625 | sprintf(p, "%lu", convdiv * (*i) / convmul); | |
2626 | len = strlen(buf); | |
2627 | if (len > left) | |
2628 | len = left; | |
2629 | if(copy_to_user(s, buf, len)) | |
2630 | return -EFAULT; | |
2631 | left -= len; | |
2632 | s += len; | |
2633 | } | |
2634 | } | |
2635 | ||
2636 | if (!write && !first && left) { | |
2637 | if(put_user('\n', s)) | |
2638 | return -EFAULT; | |
2639 | left--, s++; | |
2640 | } | |
2641 | if (write) { | |
2642 | while (left) { | |
2643 | char c; | |
2644 | if (get_user(c, s++)) | |
2645 | return -EFAULT; | |
2646 | if (!isspace(c)) | |
2647 | break; | |
2648 | left--; | |
2649 | } | |
2650 | } | |
2651 | if (write && first) | |
2652 | return -EINVAL; | |
2653 | *lenp -= left; | |
2654 | *ppos += *lenp; | |
2655 | return 0; | |
2656 | #undef TMPBUFLEN | |
2657 | } | |
2658 | ||
d8217f07 | 2659 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2660 | struct file *filp, |
2661 | void __user *buffer, | |
2662 | size_t *lenp, loff_t *ppos, | |
2663 | unsigned long convmul, | |
2664 | unsigned long convdiv) | |
2665 | { | |
2666 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
2667 | filp, buffer, lenp, ppos, convmul, convdiv); | |
2668 | } | |
2669 | ||
1da177e4 LT |
2670 | /** |
2671 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2672 | * @table: the sysctl table | |
2673 | * @write: %TRUE if this is a write to the sysctl file | |
2674 | * @filp: the file structure | |
2675 | * @buffer: the user buffer | |
2676 | * @lenp: the size of the user buffer | |
2677 | * @ppos: file position | |
2678 | * | |
2679 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2680 | * values from/to the user buffer, treated as an ASCII string. | |
2681 | * | |
2682 | * This routine will ensure the values are within the range specified by | |
2683 | * table->extra1 (min) and table->extra2 (max). | |
2684 | * | |
2685 | * Returns 0 on success. | |
2686 | */ | |
d8217f07 | 2687 | int proc_doulongvec_minmax(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2688 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2689 | { | |
2690 | return do_proc_doulongvec_minmax(table, write, filp, buffer, lenp, ppos, 1l, 1l); | |
2691 | } | |
2692 | ||
2693 | /** | |
2694 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2695 | * @table: the sysctl table | |
2696 | * @write: %TRUE if this is a write to the sysctl file | |
2697 | * @filp: the file structure | |
2698 | * @buffer: the user buffer | |
2699 | * @lenp: the size of the user buffer | |
2700 | * @ppos: file position | |
2701 | * | |
2702 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2703 | * values from/to the user buffer, treated as an ASCII string. The values | |
2704 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2705 | * | |
2706 | * This routine will ensure the values are within the range specified by | |
2707 | * table->extra1 (min) and table->extra2 (max). | |
2708 | * | |
2709 | * Returns 0 on success. | |
2710 | */ | |
d8217f07 | 2711 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2712 | struct file *filp, |
2713 | void __user *buffer, | |
2714 | size_t *lenp, loff_t *ppos) | |
2715 | { | |
2716 | return do_proc_doulongvec_minmax(table, write, filp, buffer, | |
2717 | lenp, ppos, HZ, 1000l); | |
2718 | } | |
2719 | ||
2720 | ||
2721 | static int do_proc_dointvec_jiffies_conv(int *negp, unsigned long *lvalp, | |
2722 | int *valp, | |
2723 | int write, void *data) | |
2724 | { | |
2725 | if (write) { | |
cba9f33d BS |
2726 | if (*lvalp > LONG_MAX / HZ) |
2727 | return 1; | |
1da177e4 LT |
2728 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2729 | } else { | |
2730 | int val = *valp; | |
2731 | unsigned long lval; | |
2732 | if (val < 0) { | |
2733 | *negp = -1; | |
2734 | lval = (unsigned long)-val; | |
2735 | } else { | |
2736 | *negp = 0; | |
2737 | lval = (unsigned long)val; | |
2738 | } | |
2739 | *lvalp = lval / HZ; | |
2740 | } | |
2741 | return 0; | |
2742 | } | |
2743 | ||
2744 | static int do_proc_dointvec_userhz_jiffies_conv(int *negp, unsigned long *lvalp, | |
2745 | int *valp, | |
2746 | int write, void *data) | |
2747 | { | |
2748 | if (write) { | |
cba9f33d BS |
2749 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2750 | return 1; | |
1da177e4 LT |
2751 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2752 | } else { | |
2753 | int val = *valp; | |
2754 | unsigned long lval; | |
2755 | if (val < 0) { | |
2756 | *negp = -1; | |
2757 | lval = (unsigned long)-val; | |
2758 | } else { | |
2759 | *negp = 0; | |
2760 | lval = (unsigned long)val; | |
2761 | } | |
2762 | *lvalp = jiffies_to_clock_t(lval); | |
2763 | } | |
2764 | return 0; | |
2765 | } | |
2766 | ||
2767 | static int do_proc_dointvec_ms_jiffies_conv(int *negp, unsigned long *lvalp, | |
2768 | int *valp, | |
2769 | int write, void *data) | |
2770 | { | |
2771 | if (write) { | |
2772 | *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); | |
2773 | } else { | |
2774 | int val = *valp; | |
2775 | unsigned long lval; | |
2776 | if (val < 0) { | |
2777 | *negp = -1; | |
2778 | lval = (unsigned long)-val; | |
2779 | } else { | |
2780 | *negp = 0; | |
2781 | lval = (unsigned long)val; | |
2782 | } | |
2783 | *lvalp = jiffies_to_msecs(lval); | |
2784 | } | |
2785 | return 0; | |
2786 | } | |
2787 | ||
2788 | /** | |
2789 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2790 | * @table: the sysctl table | |
2791 | * @write: %TRUE if this is a write to the sysctl file | |
2792 | * @filp: the file structure | |
2793 | * @buffer: the user buffer | |
2794 | * @lenp: the size of the user buffer | |
2795 | * @ppos: file position | |
2796 | * | |
2797 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2798 | * values from/to the user buffer, treated as an ASCII string. | |
2799 | * The values read are assumed to be in seconds, and are converted into | |
2800 | * jiffies. | |
2801 | * | |
2802 | * Returns 0 on success. | |
2803 | */ | |
d8217f07 | 2804 | int proc_dointvec_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2805 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2806 | { | |
2807 | return do_proc_dointvec(table,write,filp,buffer,lenp,ppos, | |
2808 | do_proc_dointvec_jiffies_conv,NULL); | |
2809 | } | |
2810 | ||
2811 | /** | |
2812 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2813 | * @table: the sysctl table | |
2814 | * @write: %TRUE if this is a write to the sysctl file | |
2815 | * @filp: the file structure | |
2816 | * @buffer: the user buffer | |
2817 | * @lenp: the size of the user buffer | |
1e5d5331 | 2818 | * @ppos: pointer to the file position |
1da177e4 LT |
2819 | * |
2820 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2821 | * values from/to the user buffer, treated as an ASCII string. | |
2822 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2823 | * are converted into jiffies. | |
2824 | * | |
2825 | * Returns 0 on success. | |
2826 | */ | |
d8217f07 | 2827 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2828 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2829 | { | |
2830 | return do_proc_dointvec(table,write,filp,buffer,lenp,ppos, | |
2831 | do_proc_dointvec_userhz_jiffies_conv,NULL); | |
2832 | } | |
2833 | ||
2834 | /** | |
2835 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2836 | * @table: the sysctl table | |
2837 | * @write: %TRUE if this is a write to the sysctl file | |
2838 | * @filp: the file structure | |
2839 | * @buffer: the user buffer | |
2840 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2841 | * @ppos: file position |
2842 | * @ppos: the current position in the file | |
1da177e4 LT |
2843 | * |
2844 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2845 | * values from/to the user buffer, treated as an ASCII string. | |
2846 | * The values read are assumed to be in 1/1000 seconds, and | |
2847 | * are converted into jiffies. | |
2848 | * | |
2849 | * Returns 0 on success. | |
2850 | */ | |
d8217f07 | 2851 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2852 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2853 | { | |
2854 | return do_proc_dointvec(table, write, filp, buffer, lenp, ppos, | |
2855 | do_proc_dointvec_ms_jiffies_conv, NULL); | |
2856 | } | |
2857 | ||
d8217f07 | 2858 | static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp, |
9ec52099 CLG |
2859 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2860 | { | |
2861 | struct pid *new_pid; | |
2862 | pid_t tmp; | |
2863 | int r; | |
2864 | ||
6c5f3e7b | 2865 | tmp = pid_vnr(cad_pid); |
9ec52099 CLG |
2866 | |
2867 | r = __do_proc_dointvec(&tmp, table, write, filp, buffer, | |
2868 | lenp, ppos, NULL, NULL); | |
2869 | if (r || !write) | |
2870 | return r; | |
2871 | ||
2872 | new_pid = find_get_pid(tmp); | |
2873 | if (!new_pid) | |
2874 | return -ESRCH; | |
2875 | ||
2876 | put_pid(xchg(&cad_pid, new_pid)); | |
2877 | return 0; | |
2878 | } | |
2879 | ||
1da177e4 LT |
2880 | #else /* CONFIG_PROC_FS */ |
2881 | ||
d8217f07 | 2882 | int proc_dostring(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2883 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2884 | { | |
2885 | return -ENOSYS; | |
2886 | } | |
2887 | ||
d8217f07 | 2888 | int proc_dointvec(struct ctl_table *table, int write, struct file *filp, |
1da177e4 | 2889 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2890 | { |
2891 | return -ENOSYS; | |
2892 | } | |
2893 | ||
d8217f07 | 2894 | int proc_dointvec_minmax(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2895 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2896 | { | |
2897 | return -ENOSYS; | |
2898 | } | |
2899 | ||
d8217f07 | 2900 | int proc_dointvec_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2901 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2902 | { | |
2903 | return -ENOSYS; | |
2904 | } | |
2905 | ||
d8217f07 | 2906 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2907 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2908 | { | |
2909 | return -ENOSYS; | |
2910 | } | |
2911 | ||
d8217f07 | 2912 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2913 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2914 | { | |
2915 | return -ENOSYS; | |
2916 | } | |
2917 | ||
d8217f07 | 2918 | int proc_doulongvec_minmax(struct ctl_table *table, int write, struct file *filp, |
1da177e4 LT |
2919 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2920 | { | |
2921 | return -ENOSYS; | |
2922 | } | |
2923 | ||
d8217f07 | 2924 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2925 | struct file *filp, |
2926 | void __user *buffer, | |
2927 | size_t *lenp, loff_t *ppos) | |
2928 | { | |
2929 | return -ENOSYS; | |
2930 | } | |
2931 | ||
2932 | ||
2933 | #endif /* CONFIG_PROC_FS */ | |
2934 | ||
2935 | ||
b89a8171 | 2936 | #ifdef CONFIG_SYSCTL_SYSCALL |
1da177e4 LT |
2937 | /* |
2938 | * General sysctl support routines | |
2939 | */ | |
2940 | ||
49a0c458 | 2941 | /* The generic sysctl data routine (used if no strategy routine supplied) */ |
f221e726 | 2942 | int sysctl_data(struct ctl_table *table, |
49a0c458 EB |
2943 | void __user *oldval, size_t __user *oldlenp, |
2944 | void __user *newval, size_t newlen) | |
2945 | { | |
2946 | size_t len; | |
2947 | ||
2948 | /* Get out of I don't have a variable */ | |
2949 | if (!table->data || !table->maxlen) | |
2950 | return -ENOTDIR; | |
2951 | ||
2952 | if (oldval && oldlenp) { | |
2953 | if (get_user(len, oldlenp)) | |
2954 | return -EFAULT; | |
2955 | if (len) { | |
2956 | if (len > table->maxlen) | |
2957 | len = table->maxlen; | |
2958 | if (copy_to_user(oldval, table->data, len)) | |
2959 | return -EFAULT; | |
2960 | if (put_user(len, oldlenp)) | |
2961 | return -EFAULT; | |
2962 | } | |
2963 | } | |
2964 | ||
2965 | if (newval && newlen) { | |
2966 | if (newlen > table->maxlen) | |
2967 | newlen = table->maxlen; | |
2968 | ||
2969 | if (copy_from_user(table->data, newval, newlen)) | |
2970 | return -EFAULT; | |
2971 | } | |
2972 | return 1; | |
2973 | } | |
2974 | ||
1da177e4 | 2975 | /* The generic string strategy routine: */ |
f221e726 | 2976 | int sysctl_string(struct ctl_table *table, |
1da177e4 | 2977 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2978 | void __user *newval, size_t newlen) |
1da177e4 | 2979 | { |
1da177e4 LT |
2980 | if (!table->data || !table->maxlen) |
2981 | return -ENOTDIR; | |
2982 | ||
2983 | if (oldval && oldlenp) { | |
de9e007d LT |
2984 | size_t bufsize; |
2985 | if (get_user(bufsize, oldlenp)) | |
1da177e4 | 2986 | return -EFAULT; |
de9e007d LT |
2987 | if (bufsize) { |
2988 | size_t len = strlen(table->data), copied; | |
2989 | ||
2990 | /* This shouldn't trigger for a well-formed sysctl */ | |
2991 | if (len > table->maxlen) | |
1da177e4 | 2992 | len = table->maxlen; |
de9e007d LT |
2993 | |
2994 | /* Copy up to a max of bufsize-1 bytes of the string */ | |
2995 | copied = (len >= bufsize) ? bufsize - 1 : len; | |
2996 | ||
2997 | if (copy_to_user(oldval, table->data, copied) || | |
2998 | put_user(0, (char __user *)(oldval + copied))) | |
1da177e4 | 2999 | return -EFAULT; |
de9e007d | 3000 | if (put_user(len, oldlenp)) |
1da177e4 LT |
3001 | return -EFAULT; |
3002 | } | |
3003 | } | |
3004 | if (newval && newlen) { | |
de9e007d | 3005 | size_t len = newlen; |
1da177e4 LT |
3006 | if (len > table->maxlen) |
3007 | len = table->maxlen; | |
3008 | if(copy_from_user(table->data, newval, len)) | |
3009 | return -EFAULT; | |
3010 | if (len == table->maxlen) | |
3011 | len--; | |
3012 | ((char *) table->data)[len] = 0; | |
3013 | } | |
82c9df82 | 3014 | return 1; |
1da177e4 LT |
3015 | } |
3016 | ||
3017 | /* | |
3018 | * This function makes sure that all of the integers in the vector | |
3019 | * are between the minimum and maximum values given in the arrays | |
3020 | * table->extra1 and table->extra2, respectively. | |
3021 | */ | |
f221e726 | 3022 | int sysctl_intvec(struct ctl_table *table, |
1da177e4 | 3023 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 3024 | void __user *newval, size_t newlen) |
1da177e4 LT |
3025 | { |
3026 | ||
3027 | if (newval && newlen) { | |
3028 | int __user *vec = (int __user *) newval; | |
3029 | int *min = (int *) table->extra1; | |
3030 | int *max = (int *) table->extra2; | |
3031 | size_t length; | |
3032 | int i; | |
3033 | ||
3034 | if (newlen % sizeof(int) != 0) | |
3035 | return -EINVAL; | |
3036 | ||
3037 | if (!table->extra1 && !table->extra2) | |
3038 | return 0; | |
3039 | ||
3040 | if (newlen > table->maxlen) | |
3041 | newlen = table->maxlen; | |
3042 | length = newlen / sizeof(int); | |
3043 | ||
3044 | for (i = 0; i < length; i++) { | |
3045 | int value; | |
3046 | if (get_user(value, vec + i)) | |
3047 | return -EFAULT; | |
3048 | if (min && value < min[i]) | |
3049 | return -EINVAL; | |
3050 | if (max && value > max[i]) | |
3051 | return -EINVAL; | |
3052 | } | |
3053 | } | |
3054 | return 0; | |
3055 | } | |
3056 | ||
3057 | /* Strategy function to convert jiffies to seconds */ | |
f221e726 | 3058 | int sysctl_jiffies(struct ctl_table *table, |
1da177e4 | 3059 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 3060 | void __user *newval, size_t newlen) |
1da177e4 | 3061 | { |
3ee75ac3 | 3062 | if (oldval && oldlenp) { |
1da177e4 | 3063 | size_t olen; |
3ee75ac3 AD |
3064 | |
3065 | if (get_user(olen, oldlenp)) | |
3066 | return -EFAULT; | |
3067 | if (olen) { | |
3068 | int val; | |
3069 | ||
3070 | if (olen < sizeof(int)) | |
3071 | return -EINVAL; | |
3072 | ||
3073 | val = *(int *)(table->data) / HZ; | |
3074 | if (put_user(val, (int __user *)oldval)) | |
3075 | return -EFAULT; | |
3076 | if (put_user(sizeof(int), oldlenp)) | |
1da177e4 | 3077 | return -EFAULT; |
1da177e4 | 3078 | } |
1da177e4 LT |
3079 | } |
3080 | if (newval && newlen) { | |
3081 | int new; | |
3082 | if (newlen != sizeof(int)) | |
3083 | return -EINVAL; | |
3084 | if (get_user(new, (int __user *)newval)) | |
3085 | return -EFAULT; | |
3086 | *(int *)(table->data) = new*HZ; | |
3087 | } | |
3088 | return 1; | |
3089 | } | |
3090 | ||
3091 | /* Strategy function to convert jiffies to seconds */ | |
f221e726 | 3092 | int sysctl_ms_jiffies(struct ctl_table *table, |
1da177e4 | 3093 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 3094 | void __user *newval, size_t newlen) |
1da177e4 | 3095 | { |
3ee75ac3 | 3096 | if (oldval && oldlenp) { |
1da177e4 | 3097 | size_t olen; |
3ee75ac3 AD |
3098 | |
3099 | if (get_user(olen, oldlenp)) | |
3100 | return -EFAULT; | |
3101 | if (olen) { | |
3102 | int val; | |
3103 | ||
3104 | if (olen < sizeof(int)) | |
3105 | return -EINVAL; | |
3106 | ||
3107 | val = jiffies_to_msecs(*(int *)(table->data)); | |
3108 | if (put_user(val, (int __user *)oldval)) | |
3109 | return -EFAULT; | |
3110 | if (put_user(sizeof(int), oldlenp)) | |
1da177e4 | 3111 | return -EFAULT; |
1da177e4 | 3112 | } |
1da177e4 LT |
3113 | } |
3114 | if (newval && newlen) { | |
3115 | int new; | |
3116 | if (newlen != sizeof(int)) | |
3117 | return -EINVAL; | |
3118 | if (get_user(new, (int __user *)newval)) | |
3119 | return -EFAULT; | |
3120 | *(int *)(table->data) = msecs_to_jiffies(new); | |
3121 | } | |
3122 | return 1; | |
3123 | } | |
3124 | ||
c4b8b769 | 3125 | |
c4b8b769 | 3126 | |
b89a8171 | 3127 | #else /* CONFIG_SYSCTL_SYSCALL */ |
1da177e4 LT |
3128 | |
3129 | ||
1e7bfb21 | 3130 | SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args) |
1da177e4 | 3131 | { |
0e009be8 | 3132 | struct __sysctl_args tmp; |
7058cb02 | 3133 | int error; |
0e009be8 | 3134 | |
0e009be8 EB |
3135 | if (copy_from_user(&tmp, args, sizeof(tmp))) |
3136 | return -EFAULT; | |
0e009be8 | 3137 | |
7058cb02 | 3138 | error = deprecated_sysctl_warning(&tmp); |
b89a8171 | 3139 | |
7058cb02 EB |
3140 | /* If no error reading the parameters then just -ENOSYS ... */ |
3141 | if (!error) | |
3142 | error = -ENOSYS; | |
3143 | ||
3144 | return error; | |
1da177e4 LT |
3145 | } |
3146 | ||
f221e726 | 3147 | int sysctl_data(struct ctl_table *table, |
49a0c458 EB |
3148 | void __user *oldval, size_t __user *oldlenp, |
3149 | void __user *newval, size_t newlen) | |
3150 | { | |
3151 | return -ENOSYS; | |
3152 | } | |
3153 | ||
f221e726 | 3154 | int sysctl_string(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_intvec(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 | ||
f221e726 | 3168 | int sysctl_jiffies(struct ctl_table *table, |
1da177e4 | 3169 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 3170 | void __user *newval, size_t newlen) |
1da177e4 LT |
3171 | { |
3172 | return -ENOSYS; | |
3173 | } | |
3174 | ||
f221e726 | 3175 | int sysctl_ms_jiffies(struct ctl_table *table, |
1da177e4 | 3176 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 3177 | void __user *newval, size_t newlen) |
1da177e4 LT |
3178 | { |
3179 | return -ENOSYS; | |
3180 | } | |
3181 | ||
b89a8171 | 3182 | #endif /* CONFIG_SYSCTL_SYSCALL */ |
1da177e4 | 3183 | |
7058cb02 EB |
3184 | static int deprecated_sysctl_warning(struct __sysctl_args *args) |
3185 | { | |
3186 | static int msg_count; | |
3187 | int name[CTL_MAXNAME]; | |
3188 | int i; | |
3189 | ||
6fc48af8 TH |
3190 | /* Check args->nlen. */ |
3191 | if (args->nlen < 0 || args->nlen > CTL_MAXNAME) | |
3192 | return -ENOTDIR; | |
3193 | ||
7058cb02 EB |
3194 | /* Read in the sysctl name for better debug message logging */ |
3195 | for (i = 0; i < args->nlen; i++) | |
3196 | if (get_user(name[i], args->name + i)) | |
3197 | return -EFAULT; | |
3198 | ||
3199 | /* Ignore accesses to kernel.version */ | |
3200 | if ((args->nlen == 2) && (name[0] == CTL_KERN) && (name[1] == KERN_VERSION)) | |
3201 | return 0; | |
3202 | ||
3203 | if (msg_count < 5) { | |
3204 | msg_count++; | |
3205 | printk(KERN_INFO | |
3206 | "warning: process `%s' used the deprecated sysctl " | |
3207 | "system call with ", current->comm); | |
3208 | for (i = 0; i < args->nlen; i++) | |
3209 | printk("%d.", name[i]); | |
3210 | printk("\n"); | |
3211 | } | |
3212 | return 0; | |
3213 | } | |
3214 | ||
1da177e4 LT |
3215 | /* |
3216 | * No sense putting this after each symbol definition, twice, | |
3217 | * exception granted :-) | |
3218 | */ | |
3219 | EXPORT_SYMBOL(proc_dointvec); | |
3220 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
3221 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
3222 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
3223 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
3224 | EXPORT_SYMBOL(proc_dostring); | |
3225 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
3226 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); | |
3227 | EXPORT_SYMBOL(register_sysctl_table); | |
29e796fd | 3228 | EXPORT_SYMBOL(register_sysctl_paths); |
1da177e4 LT |
3229 | EXPORT_SYMBOL(sysctl_intvec); |
3230 | EXPORT_SYMBOL(sysctl_jiffies); | |
3231 | EXPORT_SYMBOL(sysctl_ms_jiffies); | |
3232 | EXPORT_SYMBOL(sysctl_string); | |
49a0c458 | 3233 | EXPORT_SYMBOL(sysctl_data); |
1da177e4 | 3234 | EXPORT_SYMBOL(unregister_sysctl_table); |