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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 LT |
21 | #include <linux/module.h> |
22 | #include <linux/mm.h> | |
23 | #include <linux/swap.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/sysctl.h> | |
d33ed52d | 26 | #include <linux/signal.h> |
1da177e4 | 27 | #include <linux/proc_fs.h> |
72c2d582 | 28 | #include <linux/security.h> |
1da177e4 | 29 | #include <linux/ctype.h> |
dfec072e | 30 | #include <linux/kmemcheck.h> |
62239ac2 | 31 | #include <linux/fs.h> |
1da177e4 LT |
32 | #include <linux/init.h> |
33 | #include <linux/kernel.h> | |
0296b228 | 34 | #include <linux/kobject.h> |
20380731 | 35 | #include <linux/net.h> |
1da177e4 LT |
36 | #include <linux/sysrq.h> |
37 | #include <linux/highuid.h> | |
38 | #include <linux/writeback.h> | |
3fff4c42 | 39 | #include <linux/ratelimit.h> |
1da177e4 | 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> |
b2be84df | 54 | #include <linux/kprobes.h> |
1da177e4 LT |
55 | |
56 | #include <asm/uaccess.h> | |
57 | #include <asm/processor.h> | |
58 | ||
29cbc78b AK |
59 | #ifdef CONFIG_X86 |
60 | #include <asm/nmi.h> | |
0741f4d2 | 61 | #include <asm/stacktrace.h> |
6e7c4025 | 62 | #include <asm/io.h> |
29cbc78b | 63 | #endif |
c55b7c3e DY |
64 | #ifdef CONFIG_BSD_PROCESS_ACCT |
65 | #include <linux/acct.h> | |
66 | #endif | |
4f0e056f DY |
67 | #ifdef CONFIG_RT_MUTEXES |
68 | #include <linux/rtmutex.h> | |
69 | #endif | |
2edf5e49 DY |
70 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
71 | #include <linux/lockdep.h> | |
72 | #endif | |
15485a46 DY |
73 | #ifdef CONFIG_CHR_DEV_SG |
74 | #include <scsi/sg.h> | |
75 | #endif | |
29cbc78b | 76 | |
58687acb | 77 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
78 | #include <linux/nmi.h> |
79 | #endif | |
80 | ||
7058cb02 | 81 | |
1da177e4 LT |
82 | #if defined(CONFIG_SYSCTL) |
83 | ||
84 | /* External variables not in a header file. */ | |
1da177e4 LT |
85 | extern int sysctl_overcommit_memory; |
86 | extern int sysctl_overcommit_ratio; | |
fadd8fbd | 87 | extern int sysctl_panic_on_oom; |
fe071d7e | 88 | extern int sysctl_oom_kill_allocating_task; |
fef1bdd6 | 89 | extern int sysctl_oom_dump_tasks; |
1da177e4 | 90 | extern int max_threads; |
1da177e4 | 91 | extern int core_uses_pid; |
d6e71144 | 92 | extern int suid_dumpable; |
1da177e4 | 93 | extern char core_pattern[]; |
a293980c | 94 | extern unsigned int core_pipe_limit; |
1da177e4 LT |
95 | extern int pid_max; |
96 | extern int min_free_kbytes; | |
1da177e4 | 97 | extern int pid_max_min, pid_max_max; |
9d0243bc | 98 | extern int sysctl_drop_caches; |
8ad4b1fb | 99 | extern int percpu_pagelist_fraction; |
bebfa101 | 100 | extern int compat_log; |
9745512c | 101 | extern int latencytop_enabled; |
eceea0b3 | 102 | extern int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
103 | #ifndef CONFIG_MMU |
104 | extern int sysctl_nr_trim_pages; | |
105 | #endif | |
cb684b5b | 106 | #ifdef CONFIG_BLOCK |
5e605b64 | 107 | extern int blk_iopoll_enabled; |
cb684b5b | 108 | #endif |
1da177e4 | 109 | |
c4f3b63f | 110 | /* Constants used for minimum and maximum */ |
195cf453 | 111 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
c4f3b63f | 112 | static int sixty = 60; |
9383d967 | 113 | static int neg_one = -1; |
c4f3b63f RT |
114 | #endif |
115 | ||
c4f3b63f | 116 | static int zero; |
cd5f9a4c LT |
117 | static int __maybe_unused one = 1; |
118 | static int __maybe_unused two = 2; | |
fc3501d4 | 119 | static unsigned long one_ul = 1; |
c4f3b63f | 120 | static int one_hundred = 100; |
af91322e DY |
121 | #ifdef CONFIG_PRINTK |
122 | static int ten_thousand = 10000; | |
123 | #endif | |
c4f3b63f | 124 | |
9e4a5bda AR |
125 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
126 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
127 | ||
1da177e4 LT |
128 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
129 | static int maxolduid = 65535; | |
130 | static int minolduid; | |
8ad4b1fb | 131 | static int min_percpu_pagelist_fract = 8; |
1da177e4 LT |
132 | |
133 | static int ngroups_max = NGROUPS_MAX; | |
134 | ||
72c57ed5 | 135 | #ifdef CONFIG_SPARC |
17f04fbb | 136 | #include <asm/system.h> |
1da177e4 LT |
137 | #endif |
138 | ||
0871420f DM |
139 | #ifdef CONFIG_SPARC64 |
140 | extern int sysctl_tsb_ratio; | |
141 | #endif | |
142 | ||
1da177e4 LT |
143 | #ifdef __hppa__ |
144 | extern int pwrsw_enabled; | |
145 | extern int unaligned_enabled; | |
146 | #endif | |
147 | ||
347a8dc3 | 148 | #ifdef CONFIG_S390 |
1da177e4 LT |
149 | #ifdef CONFIG_MATHEMU |
150 | extern int sysctl_ieee_emulation_warnings; | |
151 | #endif | |
152 | extern int sysctl_userprocess_debug; | |
951f22d5 | 153 | extern int spin_retry; |
1da177e4 LT |
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 | ||
3fff4c42 IM |
161 | extern struct ratelimit_state printk_ratelimit_state; |
162 | ||
d6f8ff73 | 163 | #ifdef CONFIG_PROC_SYSCTL |
8d65af78 | 164 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 165 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 166 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 167 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 168 | #endif |
9ec52099 | 169 | |
d8217f07 | 170 | static struct ctl_table root_table[]; |
e51b6ba0 EB |
171 | static struct ctl_table_root sysctl_table_root; |
172 | static struct ctl_table_header root_table_header = { | |
b380b0d4 | 173 | .count = 1, |
e51b6ba0 | 174 | .ctl_table = root_table, |
73455092 | 175 | .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list), |
e51b6ba0 | 176 | .root = &sysctl_table_root, |
73455092 | 177 | .set = &sysctl_table_root.default_set, |
e51b6ba0 EB |
178 | }; |
179 | static struct ctl_table_root sysctl_table_root = { | |
180 | .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list), | |
73455092 | 181 | .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry), |
e51b6ba0 | 182 | }; |
1da177e4 | 183 | |
d8217f07 EB |
184 | static struct ctl_table kern_table[]; |
185 | static struct ctl_table vm_table[]; | |
186 | static struct ctl_table fs_table[]; | |
187 | static struct ctl_table debug_table[]; | |
188 | static struct ctl_table dev_table[]; | |
189 | extern struct ctl_table random_table[]; | |
2d9048e2 | 190 | #ifdef CONFIG_INOTIFY_USER |
d8217f07 | 191 | extern struct ctl_table inotify_table[]; |
0399cb08 | 192 | #endif |
7ef9964e DL |
193 | #ifdef CONFIG_EPOLL |
194 | extern struct ctl_table epoll_table[]; | |
195 | #endif | |
1da177e4 LT |
196 | |
197 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
198 | int sysctl_legacy_va_layout; | |
199 | #endif | |
200 | ||
1da177e4 LT |
201 | /* The default sysctl tables: */ |
202 | ||
d8217f07 | 203 | static struct ctl_table root_table[] = { |
1da177e4 | 204 | { |
1da177e4 LT |
205 | .procname = "kernel", |
206 | .mode = 0555, | |
207 | .child = kern_table, | |
208 | }, | |
209 | { | |
1da177e4 LT |
210 | .procname = "vm", |
211 | .mode = 0555, | |
212 | .child = vm_table, | |
213 | }, | |
1da177e4 | 214 | { |
1da177e4 LT |
215 | .procname = "fs", |
216 | .mode = 0555, | |
217 | .child = fs_table, | |
218 | }, | |
219 | { | |
1da177e4 LT |
220 | .procname = "debug", |
221 | .mode = 0555, | |
222 | .child = debug_table, | |
223 | }, | |
224 | { | |
1da177e4 LT |
225 | .procname = "dev", |
226 | .mode = 0555, | |
227 | .child = dev_table, | |
228 | }, | |
2be7fe07 AM |
229 | /* |
230 | * NOTE: do not add new entries to this table unless you have read | |
231 | * Documentation/sysctl/ctl_unnumbered.txt | |
232 | */ | |
6fce56ec | 233 | { } |
1da177e4 LT |
234 | }; |
235 | ||
77e54a1f | 236 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
237 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
238 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
239 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
240 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
1983a922 CE |
241 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
242 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
acb4a848 CE |
243 | static int min_sched_shares_ratelimit = 100000; /* 100 usec */ |
244 | static int max_sched_shares_ratelimit = NSEC_PER_SEC; /* 1 second */ | |
77e54a1f IM |
245 | #endif |
246 | ||
d8217f07 | 247 | static struct ctl_table kern_table[] = { |
2bba22c5 | 248 | { |
2bba22c5 MG |
249 | .procname = "sched_child_runs_first", |
250 | .data = &sysctl_sched_child_runs_first, | |
251 | .maxlen = sizeof(unsigned int), | |
252 | .mode = 0644, | |
6d456111 | 253 | .proc_handler = proc_dointvec, |
2bba22c5 | 254 | }, |
77e54a1f IM |
255 | #ifdef CONFIG_SCHED_DEBUG |
256 | { | |
b2be5e96 PZ |
257 | .procname = "sched_min_granularity_ns", |
258 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
259 | .maxlen = sizeof(unsigned int), |
260 | .mode = 0644, | |
702a7c76 | 261 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
262 | .extra1 = &min_sched_granularity_ns, |
263 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 264 | }, |
21805085 | 265 | { |
21805085 PZ |
266 | .procname = "sched_latency_ns", |
267 | .data = &sysctl_sched_latency, | |
268 | .maxlen = sizeof(unsigned int), | |
269 | .mode = 0644, | |
702a7c76 | 270 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
271 | .extra1 = &min_sched_granularity_ns, |
272 | .extra2 = &max_sched_granularity_ns, | |
273 | }, | |
77e54a1f | 274 | { |
77e54a1f IM |
275 | .procname = "sched_wakeup_granularity_ns", |
276 | .data = &sysctl_sched_wakeup_granularity, | |
277 | .maxlen = sizeof(unsigned int), | |
278 | .mode = 0644, | |
702a7c76 | 279 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
280 | .extra1 = &min_wakeup_granularity_ns, |
281 | .extra2 = &max_wakeup_granularity_ns, | |
282 | }, | |
2398f2c6 | 283 | { |
2398f2c6 PZ |
284 | .procname = "sched_shares_ratelimit", |
285 | .data = &sysctl_sched_shares_ratelimit, | |
286 | .maxlen = sizeof(unsigned int), | |
287 | .mode = 0644, | |
702a7c76 | 288 | .proc_handler = sched_proc_update_handler, |
acb4a848 CE |
289 | .extra1 = &min_sched_shares_ratelimit, |
290 | .extra2 = &max_sched_shares_ratelimit, | |
2398f2c6 | 291 | }, |
1983a922 | 292 | { |
1983a922 CE |
293 | .procname = "sched_tunable_scaling", |
294 | .data = &sysctl_sched_tunable_scaling, | |
295 | .maxlen = sizeof(enum sched_tunable_scaling), | |
296 | .mode = 0644, | |
702a7c76 | 297 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
298 | .extra1 = &min_sched_tunable_scaling, |
299 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 300 | }, |
ffda12a1 | 301 | { |
ffda12a1 PZ |
302 | .procname = "sched_shares_thresh", |
303 | .data = &sysctl_sched_shares_thresh, | |
304 | .maxlen = sizeof(unsigned int), | |
305 | .mode = 0644, | |
6d456111 | 306 | .proc_handler = proc_dointvec_minmax, |
ffda12a1 PZ |
307 | .extra1 = &zero, |
308 | }, | |
da84d961 | 309 | { |
da84d961 IM |
310 | .procname = "sched_migration_cost", |
311 | .data = &sysctl_sched_migration_cost, | |
312 | .maxlen = sizeof(unsigned int), | |
313 | .mode = 0644, | |
6d456111 | 314 | .proc_handler = proc_dointvec, |
da84d961 | 315 | }, |
b82d9fdd | 316 | { |
b82d9fdd PZ |
317 | .procname = "sched_nr_migrate", |
318 | .data = &sysctl_sched_nr_migrate, | |
319 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 320 | .mode = 0644, |
6d456111 | 321 | .proc_handler = proc_dointvec, |
fa85ae24 | 322 | }, |
e9e9250b | 323 | { |
e9e9250b PZ |
324 | .procname = "sched_time_avg", |
325 | .data = &sysctl_sched_time_avg, | |
326 | .maxlen = sizeof(unsigned int), | |
327 | .mode = 0644, | |
6d456111 | 328 | .proc_handler = proc_dointvec, |
e9e9250b | 329 | }, |
cd1bb94b | 330 | { |
cd1bb94b AB |
331 | .procname = "timer_migration", |
332 | .data = &sysctl_timer_migration, | |
333 | .maxlen = sizeof(unsigned int), | |
334 | .mode = 0644, | |
6d456111 | 335 | .proc_handler = proc_dointvec_minmax, |
bfdb4d9f AB |
336 | .extra1 = &zero, |
337 | .extra2 = &one, | |
fa85ae24 | 338 | }, |
1fc84aaa | 339 | #endif |
9f0c1e56 | 340 | { |
9f0c1e56 PZ |
341 | .procname = "sched_rt_period_us", |
342 | .data = &sysctl_sched_rt_period, | |
343 | .maxlen = sizeof(unsigned int), | |
344 | .mode = 0644, | |
6d456111 | 345 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
346 | }, |
347 | { | |
9f0c1e56 PZ |
348 | .procname = "sched_rt_runtime_us", |
349 | .data = &sysctl_sched_rt_runtime, | |
350 | .maxlen = sizeof(int), | |
351 | .mode = 0644, | |
6d456111 | 352 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 353 | }, |
1799e35d | 354 | { |
1799e35d IM |
355 | .procname = "sched_compat_yield", |
356 | .data = &sysctl_sched_compat_yield, | |
357 | .maxlen = sizeof(unsigned int), | |
358 | .mode = 0644, | |
6d456111 | 359 | .proc_handler = proc_dointvec, |
1799e35d | 360 | }, |
f20786ff PZ |
361 | #ifdef CONFIG_PROVE_LOCKING |
362 | { | |
f20786ff PZ |
363 | .procname = "prove_locking", |
364 | .data = &prove_locking, | |
365 | .maxlen = sizeof(int), | |
366 | .mode = 0644, | |
6d456111 | 367 | .proc_handler = proc_dointvec, |
f20786ff PZ |
368 | }, |
369 | #endif | |
370 | #ifdef CONFIG_LOCK_STAT | |
371 | { | |
f20786ff PZ |
372 | .procname = "lock_stat", |
373 | .data = &lock_stat, | |
374 | .maxlen = sizeof(int), | |
375 | .mode = 0644, | |
6d456111 | 376 | .proc_handler = proc_dointvec, |
f20786ff | 377 | }, |
77e54a1f | 378 | #endif |
1da177e4 | 379 | { |
1da177e4 LT |
380 | .procname = "panic", |
381 | .data = &panic_timeout, | |
382 | .maxlen = sizeof(int), | |
383 | .mode = 0644, | |
6d456111 | 384 | .proc_handler = proc_dointvec, |
1da177e4 LT |
385 | }, |
386 | { | |
1da177e4 LT |
387 | .procname = "core_uses_pid", |
388 | .data = &core_uses_pid, | |
389 | .maxlen = sizeof(int), | |
390 | .mode = 0644, | |
6d456111 | 391 | .proc_handler = proc_dointvec, |
1da177e4 LT |
392 | }, |
393 | { | |
1da177e4 LT |
394 | .procname = "core_pattern", |
395 | .data = core_pattern, | |
71ce92f3 | 396 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 397 | .mode = 0644, |
6d456111 | 398 | .proc_handler = proc_dostring, |
1da177e4 | 399 | }, |
a293980c | 400 | { |
a293980c NH |
401 | .procname = "core_pipe_limit", |
402 | .data = &core_pipe_limit, | |
403 | .maxlen = sizeof(unsigned int), | |
404 | .mode = 0644, | |
6d456111 | 405 | .proc_handler = proc_dointvec, |
a293980c | 406 | }, |
34f5a398 | 407 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 408 | { |
1da177e4 | 409 | .procname = "tainted", |
25ddbb18 | 410 | .maxlen = sizeof(long), |
34f5a398 | 411 | .mode = 0644, |
6d456111 | 412 | .proc_handler = proc_taint, |
1da177e4 | 413 | }, |
34f5a398 | 414 | #endif |
9745512c AV |
415 | #ifdef CONFIG_LATENCYTOP |
416 | { | |
417 | .procname = "latencytop", | |
418 | .data = &latencytop_enabled, | |
419 | .maxlen = sizeof(int), | |
420 | .mode = 0644, | |
6d456111 | 421 | .proc_handler = proc_dointvec, |
9745512c AV |
422 | }, |
423 | #endif | |
1da177e4 LT |
424 | #ifdef CONFIG_BLK_DEV_INITRD |
425 | { | |
1da177e4 LT |
426 | .procname = "real-root-dev", |
427 | .data = &real_root_dev, | |
428 | .maxlen = sizeof(int), | |
429 | .mode = 0644, | |
6d456111 | 430 | .proc_handler = proc_dointvec, |
1da177e4 LT |
431 | }, |
432 | #endif | |
45807a1d | 433 | { |
45807a1d IM |
434 | .procname = "print-fatal-signals", |
435 | .data = &print_fatal_signals, | |
436 | .maxlen = sizeof(int), | |
437 | .mode = 0644, | |
6d456111 | 438 | .proc_handler = proc_dointvec, |
45807a1d | 439 | }, |
72c57ed5 | 440 | #ifdef CONFIG_SPARC |
1da177e4 | 441 | { |
1da177e4 LT |
442 | .procname = "reboot-cmd", |
443 | .data = reboot_command, | |
444 | .maxlen = 256, | |
445 | .mode = 0644, | |
6d456111 | 446 | .proc_handler = proc_dostring, |
1da177e4 LT |
447 | }, |
448 | { | |
1da177e4 LT |
449 | .procname = "stop-a", |
450 | .data = &stop_a_enabled, | |
451 | .maxlen = sizeof (int), | |
452 | .mode = 0644, | |
6d456111 | 453 | .proc_handler = proc_dointvec, |
1da177e4 LT |
454 | }, |
455 | { | |
1da177e4 LT |
456 | .procname = "scons-poweroff", |
457 | .data = &scons_pwroff, | |
458 | .maxlen = sizeof (int), | |
459 | .mode = 0644, | |
6d456111 | 460 | .proc_handler = proc_dointvec, |
1da177e4 LT |
461 | }, |
462 | #endif | |
0871420f DM |
463 | #ifdef CONFIG_SPARC64 |
464 | { | |
0871420f DM |
465 | .procname = "tsb-ratio", |
466 | .data = &sysctl_tsb_ratio, | |
467 | .maxlen = sizeof (int), | |
468 | .mode = 0644, | |
6d456111 | 469 | .proc_handler = proc_dointvec, |
0871420f DM |
470 | }, |
471 | #endif | |
1da177e4 LT |
472 | #ifdef __hppa__ |
473 | { | |
1da177e4 LT |
474 | .procname = "soft-power", |
475 | .data = &pwrsw_enabled, | |
476 | .maxlen = sizeof (int), | |
477 | .mode = 0644, | |
6d456111 | 478 | .proc_handler = proc_dointvec, |
1da177e4 LT |
479 | }, |
480 | { | |
1da177e4 LT |
481 | .procname = "unaligned-trap", |
482 | .data = &unaligned_enabled, | |
483 | .maxlen = sizeof (int), | |
484 | .mode = 0644, | |
6d456111 | 485 | .proc_handler = proc_dointvec, |
1da177e4 LT |
486 | }, |
487 | #endif | |
488 | { | |
1da177e4 LT |
489 | .procname = "ctrl-alt-del", |
490 | .data = &C_A_D, | |
491 | .maxlen = sizeof(int), | |
492 | .mode = 0644, | |
6d456111 | 493 | .proc_handler = proc_dointvec, |
1da177e4 | 494 | }, |
606576ce | 495 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 496 | { |
b0fc494f SR |
497 | .procname = "ftrace_enabled", |
498 | .data = &ftrace_enabled, | |
499 | .maxlen = sizeof(int), | |
500 | .mode = 0644, | |
6d456111 | 501 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
502 | }, |
503 | #endif | |
f38f1d2a SR |
504 | #ifdef CONFIG_STACK_TRACER |
505 | { | |
f38f1d2a SR |
506 | .procname = "stack_tracer_enabled", |
507 | .data = &stack_tracer_enabled, | |
508 | .maxlen = sizeof(int), | |
509 | .mode = 0644, | |
6d456111 | 510 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
511 | }, |
512 | #endif | |
944ac425 SR |
513 | #ifdef CONFIG_TRACING |
514 | { | |
3299b4dd | 515 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
516 | .data = &ftrace_dump_on_oops, |
517 | .maxlen = sizeof(int), | |
518 | .mode = 0644, | |
6d456111 | 519 | .proc_handler = proc_dointvec, |
944ac425 SR |
520 | }, |
521 | #endif | |
a1ef5adb | 522 | #ifdef CONFIG_MODULES |
1da177e4 | 523 | { |
1da177e4 LT |
524 | .procname = "modprobe", |
525 | .data = &modprobe_path, | |
526 | .maxlen = KMOD_PATH_LEN, | |
527 | .mode = 0644, | |
6d456111 | 528 | .proc_handler = proc_dostring, |
1da177e4 | 529 | }, |
3d43321b | 530 | { |
3d43321b KC |
531 | .procname = "modules_disabled", |
532 | .data = &modules_disabled, | |
533 | .maxlen = sizeof(int), | |
534 | .mode = 0644, | |
535 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 536 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
537 | .extra1 = &one, |
538 | .extra2 = &one, | |
539 | }, | |
1da177e4 | 540 | #endif |
57ae2508 | 541 | #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET) |
1da177e4 | 542 | { |
1da177e4 | 543 | .procname = "hotplug", |
312c004d KS |
544 | .data = &uevent_helper, |
545 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 546 | .mode = 0644, |
6d456111 | 547 | .proc_handler = proc_dostring, |
1da177e4 LT |
548 | }, |
549 | #endif | |
550 | #ifdef CONFIG_CHR_DEV_SG | |
551 | { | |
1da177e4 LT |
552 | .procname = "sg-big-buff", |
553 | .data = &sg_big_buff, | |
554 | .maxlen = sizeof (int), | |
555 | .mode = 0444, | |
6d456111 | 556 | .proc_handler = proc_dointvec, |
1da177e4 LT |
557 | }, |
558 | #endif | |
559 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
560 | { | |
1da177e4 LT |
561 | .procname = "acct", |
562 | .data = &acct_parm, | |
563 | .maxlen = 3*sizeof(int), | |
564 | .mode = 0644, | |
6d456111 | 565 | .proc_handler = proc_dointvec, |
1da177e4 LT |
566 | }, |
567 | #endif | |
1da177e4 LT |
568 | #ifdef CONFIG_MAGIC_SYSRQ |
569 | { | |
1da177e4 | 570 | .procname = "sysrq", |
5d6f647f | 571 | .data = &__sysrq_enabled, |
1da177e4 LT |
572 | .maxlen = sizeof (int), |
573 | .mode = 0644, | |
6d456111 | 574 | .proc_handler = proc_dointvec, |
1da177e4 LT |
575 | }, |
576 | #endif | |
d6f8ff73 | 577 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 578 | { |
1da177e4 | 579 | .procname = "cad_pid", |
9ec52099 | 580 | .data = NULL, |
1da177e4 LT |
581 | .maxlen = sizeof (int), |
582 | .mode = 0600, | |
6d456111 | 583 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 584 | }, |
d6f8ff73 | 585 | #endif |
1da177e4 | 586 | { |
1da177e4 LT |
587 | .procname = "threads-max", |
588 | .data = &max_threads, | |
589 | .maxlen = sizeof(int), | |
590 | .mode = 0644, | |
6d456111 | 591 | .proc_handler = proc_dointvec, |
1da177e4 LT |
592 | }, |
593 | { | |
1da177e4 LT |
594 | .procname = "random", |
595 | .mode = 0555, | |
596 | .child = random_table, | |
597 | }, | |
1da177e4 | 598 | { |
1da177e4 LT |
599 | .procname = "overflowuid", |
600 | .data = &overflowuid, | |
601 | .maxlen = sizeof(int), | |
602 | .mode = 0644, | |
6d456111 | 603 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
604 | .extra1 = &minolduid, |
605 | .extra2 = &maxolduid, | |
606 | }, | |
607 | { | |
1da177e4 LT |
608 | .procname = "overflowgid", |
609 | .data = &overflowgid, | |
610 | .maxlen = sizeof(int), | |
611 | .mode = 0644, | |
6d456111 | 612 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
613 | .extra1 = &minolduid, |
614 | .extra2 = &maxolduid, | |
615 | }, | |
347a8dc3 | 616 | #ifdef CONFIG_S390 |
1da177e4 LT |
617 | #ifdef CONFIG_MATHEMU |
618 | { | |
1da177e4 LT |
619 | .procname = "ieee_emulation_warnings", |
620 | .data = &sysctl_ieee_emulation_warnings, | |
621 | .maxlen = sizeof(int), | |
622 | .mode = 0644, | |
6d456111 | 623 | .proc_handler = proc_dointvec, |
1da177e4 | 624 | }, |
1da177e4 LT |
625 | #endif |
626 | { | |
1da177e4 LT |
627 | .procname = "userprocess_debug", |
628 | .data = &sysctl_userprocess_debug, | |
629 | .maxlen = sizeof(int), | |
630 | .mode = 0644, | |
6d456111 | 631 | .proc_handler = proc_dointvec, |
1da177e4 LT |
632 | }, |
633 | #endif | |
634 | { | |
1da177e4 LT |
635 | .procname = "pid_max", |
636 | .data = &pid_max, | |
637 | .maxlen = sizeof (int), | |
638 | .mode = 0644, | |
6d456111 | 639 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
640 | .extra1 = &pid_max_min, |
641 | .extra2 = &pid_max_max, | |
642 | }, | |
643 | { | |
1da177e4 LT |
644 | .procname = "panic_on_oops", |
645 | .data = &panic_on_oops, | |
646 | .maxlen = sizeof(int), | |
647 | .mode = 0644, | |
6d456111 | 648 | .proc_handler = proc_dointvec, |
1da177e4 | 649 | }, |
7ef3d2fd JP |
650 | #if defined CONFIG_PRINTK |
651 | { | |
7ef3d2fd JP |
652 | .procname = "printk", |
653 | .data = &console_loglevel, | |
654 | .maxlen = 4*sizeof(int), | |
655 | .mode = 0644, | |
6d456111 | 656 | .proc_handler = proc_dointvec, |
7ef3d2fd | 657 | }, |
1da177e4 | 658 | { |
1da177e4 | 659 | .procname = "printk_ratelimit", |
717115e1 | 660 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
661 | .maxlen = sizeof(int), |
662 | .mode = 0644, | |
6d456111 | 663 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
664 | }, |
665 | { | |
1da177e4 | 666 | .procname = "printk_ratelimit_burst", |
717115e1 | 667 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
668 | .maxlen = sizeof(int), |
669 | .mode = 0644, | |
6d456111 | 670 | .proc_handler = proc_dointvec, |
1da177e4 | 671 | }, |
af91322e | 672 | { |
af91322e DY |
673 | .procname = "printk_delay", |
674 | .data = &printk_delay_msec, | |
675 | .maxlen = sizeof(int), | |
676 | .mode = 0644, | |
6d456111 | 677 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
678 | .extra1 = &zero, |
679 | .extra2 = &ten_thousand, | |
680 | }, | |
7ef3d2fd | 681 | #endif |
1da177e4 | 682 | { |
1da177e4 LT |
683 | .procname = "ngroups_max", |
684 | .data = &ngroups_max, | |
685 | .maxlen = sizeof (int), | |
686 | .mode = 0444, | |
6d456111 | 687 | .proc_handler = proc_dointvec, |
1da177e4 | 688 | }, |
58687acb | 689 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 690 | { |
58687acb DZ |
691 | .procname = "watchdog", |
692 | .data = &watchdog_enabled, | |
504d7cf1 DZ |
693 | .maxlen = sizeof (int), |
694 | .mode = 0644, | |
58687acb DZ |
695 | .proc_handler = proc_dowatchdog_enabled, |
696 | }, | |
697 | { | |
698 | .procname = "watchdog_thresh", | |
699 | .data = &softlockup_thresh, | |
700 | .maxlen = sizeof(int), | |
701 | .mode = 0644, | |
702 | .proc_handler = proc_dowatchdog_thresh, | |
703 | .extra1 = &neg_one, | |
704 | .extra2 = &sixty, | |
504d7cf1 DZ |
705 | }, |
706 | #endif | |
58687acb | 707 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) && !defined(CONFIG_LOCKUP_DETECTOR) |
1da177e4 | 708 | { |
1da177e4 LT |
709 | .procname = "unknown_nmi_panic", |
710 | .data = &unknown_nmi_panic, | |
711 | .maxlen = sizeof (int), | |
712 | .mode = 0644, | |
6d456111 | 713 | .proc_handler = proc_dointvec, |
1da177e4 | 714 | }, |
407984f1 | 715 | { |
407984f1 DZ |
716 | .procname = "nmi_watchdog", |
717 | .data = &nmi_watchdog_enabled, | |
718 | .maxlen = sizeof (int), | |
719 | .mode = 0644, | |
6d456111 | 720 | .proc_handler = proc_nmi_enabled, |
1da177e4 LT |
721 | }, |
722 | #endif | |
723 | #if defined(CONFIG_X86) | |
8da5adda | 724 | { |
8da5adda DZ |
725 | .procname = "panic_on_unrecovered_nmi", |
726 | .data = &panic_on_unrecovered_nmi, | |
727 | .maxlen = sizeof(int), | |
728 | .mode = 0644, | |
6d456111 | 729 | .proc_handler = proc_dointvec, |
8da5adda | 730 | }, |
5211a242 | 731 | { |
5211a242 KG |
732 | .procname = "panic_on_io_nmi", |
733 | .data = &panic_on_io_nmi, | |
734 | .maxlen = sizeof(int), | |
735 | .mode = 0644, | |
6d456111 | 736 | .proc_handler = proc_dointvec, |
5211a242 | 737 | }, |
1da177e4 | 738 | { |
1da177e4 LT |
739 | .procname = "bootloader_type", |
740 | .data = &bootloader_type, | |
741 | .maxlen = sizeof (int), | |
742 | .mode = 0444, | |
6d456111 | 743 | .proc_handler = proc_dointvec, |
1da177e4 | 744 | }, |
5031296c | 745 | { |
5031296c PA |
746 | .procname = "bootloader_version", |
747 | .data = &bootloader_version, | |
748 | .maxlen = sizeof (int), | |
749 | .mode = 0444, | |
6d456111 | 750 | .proc_handler = proc_dointvec, |
5031296c | 751 | }, |
0741f4d2 | 752 | { |
0741f4d2 CE |
753 | .procname = "kstack_depth_to_print", |
754 | .data = &kstack_depth_to_print, | |
755 | .maxlen = sizeof(int), | |
756 | .mode = 0644, | |
6d456111 | 757 | .proc_handler = proc_dointvec, |
0741f4d2 | 758 | }, |
6e7c4025 | 759 | { |
6e7c4025 IM |
760 | .procname = "io_delay_type", |
761 | .data = &io_delay_type, | |
762 | .maxlen = sizeof(int), | |
763 | .mode = 0644, | |
6d456111 | 764 | .proc_handler = proc_dointvec, |
6e7c4025 | 765 | }, |
1da177e4 | 766 | #endif |
7a9166e3 | 767 | #if defined(CONFIG_MMU) |
1da177e4 | 768 | { |
1da177e4 LT |
769 | .procname = "randomize_va_space", |
770 | .data = &randomize_va_space, | |
771 | .maxlen = sizeof(int), | |
772 | .mode = 0644, | |
6d456111 | 773 | .proc_handler = proc_dointvec, |
1da177e4 | 774 | }, |
7a9166e3 | 775 | #endif |
0152fb37 | 776 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 777 | { |
951f22d5 MS |
778 | .procname = "spin_retry", |
779 | .data = &spin_retry, | |
780 | .maxlen = sizeof (int), | |
781 | .mode = 0644, | |
6d456111 | 782 | .proc_handler = proc_dointvec, |
951f22d5 | 783 | }, |
c255d844 | 784 | #endif |
673d5b43 | 785 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 786 | { |
c255d844 | 787 | .procname = "acpi_video_flags", |
77afcf78 | 788 | .data = &acpi_realmode_flags, |
c255d844 PM |
789 | .maxlen = sizeof (unsigned long), |
790 | .mode = 0644, | |
6d456111 | 791 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 792 | }, |
d2b176ed JS |
793 | #endif |
794 | #ifdef CONFIG_IA64 | |
795 | { | |
d2b176ed JS |
796 | .procname = "ignore-unaligned-usertrap", |
797 | .data = &no_unaligned_warning, | |
798 | .maxlen = sizeof (int), | |
799 | .mode = 0644, | |
6d456111 | 800 | .proc_handler = proc_dointvec, |
d2b176ed | 801 | }, |
88fc241f | 802 | { |
88fc241f DC |
803 | .procname = "unaligned-dump-stack", |
804 | .data = &unaligned_dump_stack, | |
805 | .maxlen = sizeof (int), | |
806 | .mode = 0644, | |
6d456111 | 807 | .proc_handler = proc_dointvec, |
88fc241f | 808 | }, |
bebfa101 | 809 | #endif |
c4f3b63f | 810 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
9c44bc03 | 811 | { |
9c44bc03 IM |
812 | .procname = "softlockup_panic", |
813 | .data = &softlockup_panic, | |
814 | .maxlen = sizeof(int), | |
815 | .mode = 0644, | |
6d456111 | 816 | .proc_handler = proc_dointvec_minmax, |
9c44bc03 IM |
817 | .extra1 = &zero, |
818 | .extra2 = &one, | |
819 | }, | |
e162b39a MSB |
820 | #endif |
821 | #ifdef CONFIG_DETECT_HUNG_TASK | |
822 | { | |
e162b39a MSB |
823 | .procname = "hung_task_panic", |
824 | .data = &sysctl_hung_task_panic, | |
825 | .maxlen = sizeof(int), | |
826 | .mode = 0644, | |
6d456111 | 827 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
828 | .extra1 = &zero, |
829 | .extra2 = &one, | |
830 | }, | |
82a1fcb9 | 831 | { |
82a1fcb9 IM |
832 | .procname = "hung_task_check_count", |
833 | .data = &sysctl_hung_task_check_count, | |
90739081 | 834 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 835 | .mode = 0644, |
6d456111 | 836 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 IM |
837 | }, |
838 | { | |
82a1fcb9 IM |
839 | .procname = "hung_task_timeout_secs", |
840 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 841 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 842 | .mode = 0644, |
6d456111 | 843 | .proc_handler = proc_dohung_task_timeout_secs, |
82a1fcb9 IM |
844 | }, |
845 | { | |
82a1fcb9 IM |
846 | .procname = "hung_task_warnings", |
847 | .data = &sysctl_hung_task_warnings, | |
90739081 | 848 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 849 | .mode = 0644, |
6d456111 | 850 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 | 851 | }, |
c4f3b63f | 852 | #endif |
bebfa101 AK |
853 | #ifdef CONFIG_COMPAT |
854 | { | |
bebfa101 AK |
855 | .procname = "compat-log", |
856 | .data = &compat_log, | |
857 | .maxlen = sizeof (int), | |
858 | .mode = 0644, | |
6d456111 | 859 | .proc_handler = proc_dointvec, |
bebfa101 | 860 | }, |
951f22d5 | 861 | #endif |
23f78d4a IM |
862 | #ifdef CONFIG_RT_MUTEXES |
863 | { | |
23f78d4a IM |
864 | .procname = "max_lock_depth", |
865 | .data = &max_lock_depth, | |
866 | .maxlen = sizeof(int), | |
867 | .mode = 0644, | |
6d456111 | 868 | .proc_handler = proc_dointvec, |
23f78d4a | 869 | }, |
5096add8 | 870 | #endif |
10a0a8d4 | 871 | { |
10a0a8d4 JF |
872 | .procname = "poweroff_cmd", |
873 | .data = &poweroff_cmd, | |
874 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
875 | .mode = 0644, | |
6d456111 | 876 | .proc_handler = proc_dostring, |
10a0a8d4 | 877 | }, |
0b77f5bf DH |
878 | #ifdef CONFIG_KEYS |
879 | { | |
0b77f5bf DH |
880 | .procname = "keys", |
881 | .mode = 0555, | |
882 | .child = key_sysctls, | |
883 | }, | |
884 | #endif | |
31a72bce PM |
885 | #ifdef CONFIG_RCU_TORTURE_TEST |
886 | { | |
31a72bce PM |
887 | .procname = "rcutorture_runnable", |
888 | .data = &rcutorture_runnable, | |
889 | .maxlen = sizeof(int), | |
890 | .mode = 0644, | |
6d456111 | 891 | .proc_handler = proc_dointvec, |
31a72bce PM |
892 | }, |
893 | #endif | |
12e22c5e DH |
894 | #ifdef CONFIG_SLOW_WORK |
895 | { | |
12e22c5e DH |
896 | .procname = "slow-work", |
897 | .mode = 0555, | |
898 | .child = slow_work_sysctls, | |
899 | }, | |
900 | #endif | |
cdd6c482 | 901 | #ifdef CONFIG_PERF_EVENTS |
1ccd1549 | 902 | { |
cdd6c482 IM |
903 | .procname = "perf_event_paranoid", |
904 | .data = &sysctl_perf_event_paranoid, | |
905 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 906 | .mode = 0644, |
6d456111 | 907 | .proc_handler = proc_dointvec, |
1ccd1549 | 908 | }, |
c5078f78 | 909 | { |
cdd6c482 IM |
910 | .procname = "perf_event_mlock_kb", |
911 | .data = &sysctl_perf_event_mlock, | |
912 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 913 | .mode = 0644, |
6d456111 | 914 | .proc_handler = proc_dointvec, |
c5078f78 | 915 | }, |
a78ac325 | 916 | { |
cdd6c482 IM |
917 | .procname = "perf_event_max_sample_rate", |
918 | .data = &sysctl_perf_event_sample_rate, | |
919 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 920 | .mode = 0644, |
6d456111 | 921 | .proc_handler = proc_dointvec, |
a78ac325 | 922 | }, |
1ccd1549 | 923 | #endif |
dfec072e VN |
924 | #ifdef CONFIG_KMEMCHECK |
925 | { | |
dfec072e VN |
926 | .procname = "kmemcheck", |
927 | .data = &kmemcheck_enabled, | |
928 | .maxlen = sizeof(int), | |
929 | .mode = 0644, | |
6d456111 | 930 | .proc_handler = proc_dointvec, |
dfec072e VN |
931 | }, |
932 | #endif | |
cb684b5b | 933 | #ifdef CONFIG_BLOCK |
5e605b64 | 934 | { |
5e605b64 JA |
935 | .procname = "blk_iopoll", |
936 | .data = &blk_iopoll_enabled, | |
937 | .maxlen = sizeof(int), | |
938 | .mode = 0644, | |
6d456111 | 939 | .proc_handler = proc_dointvec, |
5e605b64 | 940 | }, |
cb684b5b | 941 | #endif |
ed2c12f3 AM |
942 | /* |
943 | * NOTE: do not add new entries to this table unless you have read | |
944 | * Documentation/sysctl/ctl_unnumbered.txt | |
945 | */ | |
6fce56ec | 946 | { } |
1da177e4 LT |
947 | }; |
948 | ||
d8217f07 | 949 | static struct ctl_table vm_table[] = { |
1da177e4 | 950 | { |
1da177e4 LT |
951 | .procname = "overcommit_memory", |
952 | .data = &sysctl_overcommit_memory, | |
953 | .maxlen = sizeof(sysctl_overcommit_memory), | |
954 | .mode = 0644, | |
6d456111 | 955 | .proc_handler = proc_dointvec, |
1da177e4 | 956 | }, |
fadd8fbd | 957 | { |
fadd8fbd KH |
958 | .procname = "panic_on_oom", |
959 | .data = &sysctl_panic_on_oom, | |
960 | .maxlen = sizeof(sysctl_panic_on_oom), | |
961 | .mode = 0644, | |
6d456111 | 962 | .proc_handler = proc_dointvec, |
fadd8fbd | 963 | }, |
fe071d7e | 964 | { |
fe071d7e DR |
965 | .procname = "oom_kill_allocating_task", |
966 | .data = &sysctl_oom_kill_allocating_task, | |
967 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
968 | .mode = 0644, | |
6d456111 | 969 | .proc_handler = proc_dointvec, |
fe071d7e | 970 | }, |
fef1bdd6 | 971 | { |
fef1bdd6 DR |
972 | .procname = "oom_dump_tasks", |
973 | .data = &sysctl_oom_dump_tasks, | |
974 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
975 | .mode = 0644, | |
6d456111 | 976 | .proc_handler = proc_dointvec, |
fef1bdd6 | 977 | }, |
1da177e4 | 978 | { |
1da177e4 LT |
979 | .procname = "overcommit_ratio", |
980 | .data = &sysctl_overcommit_ratio, | |
981 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
982 | .mode = 0644, | |
6d456111 | 983 | .proc_handler = proc_dointvec, |
1da177e4 LT |
984 | }, |
985 | { | |
1da177e4 LT |
986 | .procname = "page-cluster", |
987 | .data = &page_cluster, | |
988 | .maxlen = sizeof(int), | |
989 | .mode = 0644, | |
6d456111 | 990 | .proc_handler = proc_dointvec, |
1da177e4 LT |
991 | }, |
992 | { | |
1da177e4 LT |
993 | .procname = "dirty_background_ratio", |
994 | .data = &dirty_background_ratio, | |
995 | .maxlen = sizeof(dirty_background_ratio), | |
996 | .mode = 0644, | |
6d456111 | 997 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
998 | .extra1 = &zero, |
999 | .extra2 = &one_hundred, | |
1000 | }, | |
2da02997 | 1001 | { |
2da02997 DR |
1002 | .procname = "dirty_background_bytes", |
1003 | .data = &dirty_background_bytes, | |
1004 | .maxlen = sizeof(dirty_background_bytes), | |
1005 | .mode = 0644, | |
6d456111 | 1006 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1007 | .extra1 = &one_ul, |
2da02997 | 1008 | }, |
1da177e4 | 1009 | { |
1da177e4 LT |
1010 | .procname = "dirty_ratio", |
1011 | .data = &vm_dirty_ratio, | |
1012 | .maxlen = sizeof(vm_dirty_ratio), | |
1013 | .mode = 0644, | |
6d456111 | 1014 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1015 | .extra1 = &zero, |
1016 | .extra2 = &one_hundred, | |
1017 | }, | |
2da02997 | 1018 | { |
2da02997 DR |
1019 | .procname = "dirty_bytes", |
1020 | .data = &vm_dirty_bytes, | |
1021 | .maxlen = sizeof(vm_dirty_bytes), | |
1022 | .mode = 0644, | |
6d456111 | 1023 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1024 | .extra1 = &dirty_bytes_min, |
2da02997 | 1025 | }, |
1da177e4 | 1026 | { |
1da177e4 | 1027 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1028 | .data = &dirty_writeback_interval, |
1029 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1030 | .mode = 0644, |
6d456111 | 1031 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1032 | }, |
1033 | { | |
1da177e4 | 1034 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1035 | .data = &dirty_expire_interval, |
1036 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1037 | .mode = 0644, |
6d456111 | 1038 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1039 | }, |
1040 | { | |
1da177e4 LT |
1041 | .procname = "nr_pdflush_threads", |
1042 | .data = &nr_pdflush_threads, | |
1043 | .maxlen = sizeof nr_pdflush_threads, | |
1044 | .mode = 0444 /* read-only*/, | |
6d456111 | 1045 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1046 | }, |
1047 | { | |
1da177e4 LT |
1048 | .procname = "swappiness", |
1049 | .data = &vm_swappiness, | |
1050 | .maxlen = sizeof(vm_swappiness), | |
1051 | .mode = 0644, | |
6d456111 | 1052 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1053 | .extra1 = &zero, |
1054 | .extra2 = &one_hundred, | |
1055 | }, | |
1056 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1057 | { |
1da177e4 | 1058 | .procname = "nr_hugepages", |
e5ff2159 | 1059 | .data = NULL, |
1da177e4 LT |
1060 | .maxlen = sizeof(unsigned long), |
1061 | .mode = 0644, | |
6d456111 | 1062 | .proc_handler = hugetlb_sysctl_handler, |
1da177e4 LT |
1063 | .extra1 = (void *)&hugetlb_zero, |
1064 | .extra2 = (void *)&hugetlb_infinity, | |
06808b08 LS |
1065 | }, |
1066 | #ifdef CONFIG_NUMA | |
1067 | { | |
1068 | .procname = "nr_hugepages_mempolicy", | |
1069 | .data = NULL, | |
1070 | .maxlen = sizeof(unsigned long), | |
1071 | .mode = 0644, | |
1072 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
1073 | .extra1 = (void *)&hugetlb_zero, | |
1074 | .extra2 = (void *)&hugetlb_infinity, | |
1075 | }, | |
1076 | #endif | |
1da177e4 | 1077 | { |
1da177e4 LT |
1078 | .procname = "hugetlb_shm_group", |
1079 | .data = &sysctl_hugetlb_shm_group, | |
1080 | .maxlen = sizeof(gid_t), | |
1081 | .mode = 0644, | |
6d456111 | 1082 | .proc_handler = proc_dointvec, |
1da177e4 | 1083 | }, |
396faf03 | 1084 | { |
396faf03 MG |
1085 | .procname = "hugepages_treat_as_movable", |
1086 | .data = &hugepages_treat_as_movable, | |
1087 | .maxlen = sizeof(int), | |
1088 | .mode = 0644, | |
6d456111 | 1089 | .proc_handler = hugetlb_treat_movable_handler, |
396faf03 | 1090 | }, |
d1c3fb1f | 1091 | { |
d1c3fb1f | 1092 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1093 | .data = NULL, |
1094 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1095 | .mode = 0644, |
6d456111 | 1096 | .proc_handler = hugetlb_overcommit_handler, |
e5ff2159 AK |
1097 | .extra1 = (void *)&hugetlb_zero, |
1098 | .extra2 = (void *)&hugetlb_infinity, | |
d1c3fb1f | 1099 | }, |
1da177e4 LT |
1100 | #endif |
1101 | { | |
1da177e4 LT |
1102 | .procname = "lowmem_reserve_ratio", |
1103 | .data = &sysctl_lowmem_reserve_ratio, | |
1104 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1105 | .mode = 0644, | |
6d456111 | 1106 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1107 | }, |
9d0243bc | 1108 | { |
9d0243bc AM |
1109 | .procname = "drop_caches", |
1110 | .data = &sysctl_drop_caches, | |
1111 | .maxlen = sizeof(int), | |
1112 | .mode = 0644, | |
1113 | .proc_handler = drop_caches_sysctl_handler, | |
9d0243bc | 1114 | }, |
1da177e4 | 1115 | { |
1da177e4 LT |
1116 | .procname = "min_free_kbytes", |
1117 | .data = &min_free_kbytes, | |
1118 | .maxlen = sizeof(min_free_kbytes), | |
1119 | .mode = 0644, | |
6d456111 | 1120 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1121 | .extra1 = &zero, |
1122 | }, | |
8ad4b1fb | 1123 | { |
8ad4b1fb RS |
1124 | .procname = "percpu_pagelist_fraction", |
1125 | .data = &percpu_pagelist_fraction, | |
1126 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1127 | .mode = 0644, | |
6d456111 | 1128 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
8ad4b1fb RS |
1129 | .extra1 = &min_percpu_pagelist_fract, |
1130 | }, | |
1da177e4 LT |
1131 | #ifdef CONFIG_MMU |
1132 | { | |
1da177e4 LT |
1133 | .procname = "max_map_count", |
1134 | .data = &sysctl_max_map_count, | |
1135 | .maxlen = sizeof(sysctl_max_map_count), | |
1136 | .mode = 0644, | |
3e26120c | 1137 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1138 | .extra1 = &zero, |
1da177e4 | 1139 | }, |
dd8632a1 PM |
1140 | #else |
1141 | { | |
dd8632a1 PM |
1142 | .procname = "nr_trim_pages", |
1143 | .data = &sysctl_nr_trim_pages, | |
1144 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1145 | .mode = 0644, | |
6d456111 | 1146 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1147 | .extra1 = &zero, |
1148 | }, | |
1da177e4 LT |
1149 | #endif |
1150 | { | |
1da177e4 LT |
1151 | .procname = "laptop_mode", |
1152 | .data = &laptop_mode, | |
1153 | .maxlen = sizeof(laptop_mode), | |
1154 | .mode = 0644, | |
6d456111 | 1155 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1156 | }, |
1157 | { | |
1da177e4 LT |
1158 | .procname = "block_dump", |
1159 | .data = &block_dump, | |
1160 | .maxlen = sizeof(block_dump), | |
1161 | .mode = 0644, | |
6d456111 | 1162 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1163 | .extra1 = &zero, |
1164 | }, | |
1165 | { | |
1da177e4 LT |
1166 | .procname = "vfs_cache_pressure", |
1167 | .data = &sysctl_vfs_cache_pressure, | |
1168 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1169 | .mode = 0644, | |
6d456111 | 1170 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1171 | .extra1 = &zero, |
1172 | }, | |
1173 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1174 | { | |
1da177e4 LT |
1175 | .procname = "legacy_va_layout", |
1176 | .data = &sysctl_legacy_va_layout, | |
1177 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1178 | .mode = 0644, | |
6d456111 | 1179 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1180 | .extra1 = &zero, |
1181 | }, | |
1182 | #endif | |
1743660b CL |
1183 | #ifdef CONFIG_NUMA |
1184 | { | |
1743660b CL |
1185 | .procname = "zone_reclaim_mode", |
1186 | .data = &zone_reclaim_mode, | |
1187 | .maxlen = sizeof(zone_reclaim_mode), | |
1188 | .mode = 0644, | |
6d456111 | 1189 | .proc_handler = proc_dointvec, |
c84db23c | 1190 | .extra1 = &zero, |
1743660b | 1191 | }, |
9614634f | 1192 | { |
9614634f CL |
1193 | .procname = "min_unmapped_ratio", |
1194 | .data = &sysctl_min_unmapped_ratio, | |
1195 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1196 | .mode = 0644, | |
6d456111 | 1197 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1198 | .extra1 = &zero, |
1199 | .extra2 = &one_hundred, | |
1200 | }, | |
0ff38490 | 1201 | { |
0ff38490 CL |
1202 | .procname = "min_slab_ratio", |
1203 | .data = &sysctl_min_slab_ratio, | |
1204 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1205 | .mode = 0644, | |
6d456111 | 1206 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1207 | .extra1 = &zero, |
1208 | .extra2 = &one_hundred, | |
1209 | }, | |
e6e5494c | 1210 | #endif |
77461ab3 CL |
1211 | #ifdef CONFIG_SMP |
1212 | { | |
77461ab3 CL |
1213 | .procname = "stat_interval", |
1214 | .data = &sysctl_stat_interval, | |
1215 | .maxlen = sizeof(sysctl_stat_interval), | |
1216 | .mode = 0644, | |
6d456111 | 1217 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1218 | }, |
1219 | #endif | |
6e141546 | 1220 | #ifdef CONFIG_MMU |
ed032189 | 1221 | { |
ed032189 | 1222 | .procname = "mmap_min_addr", |
788084ab EP |
1223 | .data = &dac_mmap_min_addr, |
1224 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1225 | .mode = 0644, |
6d456111 | 1226 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1227 | }, |
6e141546 | 1228 | #endif |
f0c0b2b8 KH |
1229 | #ifdef CONFIG_NUMA |
1230 | { | |
f0c0b2b8 KH |
1231 | .procname = "numa_zonelist_order", |
1232 | .data = &numa_zonelist_order, | |
1233 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1234 | .mode = 0644, | |
6d456111 | 1235 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1236 | }, |
1237 | #endif | |
2b8232ce | 1238 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1239 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1240 | { |
e6e5494c IM |
1241 | .procname = "vdso_enabled", |
1242 | .data = &vdso_enabled, | |
1243 | .maxlen = sizeof(vdso_enabled), | |
1244 | .mode = 0644, | |
6d456111 | 1245 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1246 | .extra1 = &zero, |
1247 | }, | |
1da177e4 | 1248 | #endif |
195cf453 BG |
1249 | #ifdef CONFIG_HIGHMEM |
1250 | { | |
195cf453 BG |
1251 | .procname = "highmem_is_dirtyable", |
1252 | .data = &vm_highmem_is_dirtyable, | |
1253 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1254 | .mode = 0644, | |
6d456111 | 1255 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1256 | .extra1 = &zero, |
1257 | .extra2 = &one, | |
1258 | }, | |
1259 | #endif | |
4be6f6bb | 1260 | { |
4be6f6bb PZ |
1261 | .procname = "scan_unevictable_pages", |
1262 | .data = &scan_unevictable_pages, | |
1263 | .maxlen = sizeof(scan_unevictable_pages), | |
1264 | .mode = 0644, | |
6d456111 | 1265 | .proc_handler = scan_unevictable_handler, |
4be6f6bb | 1266 | }, |
6a46079c AK |
1267 | #ifdef CONFIG_MEMORY_FAILURE |
1268 | { | |
6a46079c AK |
1269 | .procname = "memory_failure_early_kill", |
1270 | .data = &sysctl_memory_failure_early_kill, | |
1271 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1272 | .mode = 0644, | |
6d456111 | 1273 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1274 | .extra1 = &zero, |
1275 | .extra2 = &one, | |
1276 | }, | |
1277 | { | |
6a46079c AK |
1278 | .procname = "memory_failure_recovery", |
1279 | .data = &sysctl_memory_failure_recovery, | |
1280 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1281 | .mode = 0644, | |
6d456111 | 1282 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1283 | .extra1 = &zero, |
1284 | .extra2 = &one, | |
1285 | }, | |
1286 | #endif | |
1287 | ||
2be7fe07 AM |
1288 | /* |
1289 | * NOTE: do not add new entries to this table unless you have read | |
1290 | * Documentation/sysctl/ctl_unnumbered.txt | |
1291 | */ | |
6fce56ec | 1292 | { } |
1da177e4 LT |
1293 | }; |
1294 | ||
2abc26fc | 1295 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1296 | static struct ctl_table binfmt_misc_table[] = { |
6fce56ec | 1297 | { } |
2abc26fc EB |
1298 | }; |
1299 | #endif | |
1300 | ||
d8217f07 | 1301 | static struct ctl_table fs_table[] = { |
1da177e4 | 1302 | { |
1da177e4 LT |
1303 | .procname = "inode-nr", |
1304 | .data = &inodes_stat, | |
1305 | .maxlen = 2*sizeof(int), | |
1306 | .mode = 0444, | |
6d456111 | 1307 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1308 | }, |
1309 | { | |
1da177e4 LT |
1310 | .procname = "inode-state", |
1311 | .data = &inodes_stat, | |
1312 | .maxlen = 7*sizeof(int), | |
1313 | .mode = 0444, | |
6d456111 | 1314 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1315 | }, |
1316 | { | |
1da177e4 LT |
1317 | .procname = "file-nr", |
1318 | .data = &files_stat, | |
1319 | .maxlen = 3*sizeof(int), | |
1320 | .mode = 0444, | |
6d456111 | 1321 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1322 | }, |
1323 | { | |
1da177e4 LT |
1324 | .procname = "file-max", |
1325 | .data = &files_stat.max_files, | |
1326 | .maxlen = sizeof(int), | |
1327 | .mode = 0644, | |
6d456111 | 1328 | .proc_handler = proc_dointvec, |
1da177e4 | 1329 | }, |
9cfe015a | 1330 | { |
9cfe015a ED |
1331 | .procname = "nr_open", |
1332 | .data = &sysctl_nr_open, | |
1333 | .maxlen = sizeof(int), | |
1334 | .mode = 0644, | |
6d456111 | 1335 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1336 | .extra1 = &sysctl_nr_open_min, |
1337 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1338 | }, |
1da177e4 | 1339 | { |
1da177e4 LT |
1340 | .procname = "dentry-state", |
1341 | .data = &dentry_stat, | |
1342 | .maxlen = 6*sizeof(int), | |
1343 | .mode = 0444, | |
6d456111 | 1344 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1345 | }, |
1346 | { | |
1da177e4 LT |
1347 | .procname = "overflowuid", |
1348 | .data = &fs_overflowuid, | |
1349 | .maxlen = sizeof(int), | |
1350 | .mode = 0644, | |
6d456111 | 1351 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1352 | .extra1 = &minolduid, |
1353 | .extra2 = &maxolduid, | |
1354 | }, | |
1355 | { | |
1da177e4 LT |
1356 | .procname = "overflowgid", |
1357 | .data = &fs_overflowgid, | |
1358 | .maxlen = sizeof(int), | |
1359 | .mode = 0644, | |
6d456111 | 1360 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1361 | .extra1 = &minolduid, |
1362 | .extra2 = &maxolduid, | |
1363 | }, | |
bfcd17a6 | 1364 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1365 | { |
1da177e4 LT |
1366 | .procname = "leases-enable", |
1367 | .data = &leases_enable, | |
1368 | .maxlen = sizeof(int), | |
1369 | .mode = 0644, | |
6d456111 | 1370 | .proc_handler = proc_dointvec, |
1da177e4 | 1371 | }, |
bfcd17a6 | 1372 | #endif |
1da177e4 LT |
1373 | #ifdef CONFIG_DNOTIFY |
1374 | { | |
1da177e4 LT |
1375 | .procname = "dir-notify-enable", |
1376 | .data = &dir_notify_enable, | |
1377 | .maxlen = sizeof(int), | |
1378 | .mode = 0644, | |
6d456111 | 1379 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1380 | }, |
1381 | #endif | |
1382 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1383 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1384 | { |
1da177e4 LT |
1385 | .procname = "lease-break-time", |
1386 | .data = &lease_break_time, | |
1387 | .maxlen = sizeof(int), | |
1388 | .mode = 0644, | |
6d456111 | 1389 | .proc_handler = proc_dointvec, |
1da177e4 | 1390 | }, |
bfcd17a6 | 1391 | #endif |
ebf3f09c | 1392 | #ifdef CONFIG_AIO |
1da177e4 | 1393 | { |
1da177e4 LT |
1394 | .procname = "aio-nr", |
1395 | .data = &aio_nr, | |
1396 | .maxlen = sizeof(aio_nr), | |
1397 | .mode = 0444, | |
6d456111 | 1398 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1399 | }, |
1400 | { | |
1da177e4 LT |
1401 | .procname = "aio-max-nr", |
1402 | .data = &aio_max_nr, | |
1403 | .maxlen = sizeof(aio_max_nr), | |
1404 | .mode = 0644, | |
6d456111 | 1405 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1406 | }, |
ebf3f09c | 1407 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1408 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1409 | { |
0399cb08 RL |
1410 | .procname = "inotify", |
1411 | .mode = 0555, | |
1412 | .child = inotify_table, | |
1413 | }, | |
1414 | #endif | |
7ef9964e DL |
1415 | #ifdef CONFIG_EPOLL |
1416 | { | |
1417 | .procname = "epoll", | |
1418 | .mode = 0555, | |
1419 | .child = epoll_table, | |
1420 | }, | |
1421 | #endif | |
1da177e4 | 1422 | #endif |
d6e71144 | 1423 | { |
d6e71144 AC |
1424 | .procname = "suid_dumpable", |
1425 | .data = &suid_dumpable, | |
1426 | .maxlen = sizeof(int), | |
1427 | .mode = 0644, | |
6d456111 | 1428 | .proc_handler = proc_dointvec_minmax, |
8e654fba MW |
1429 | .extra1 = &zero, |
1430 | .extra2 = &two, | |
d6e71144 | 1431 | }, |
2abc26fc EB |
1432 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1433 | { | |
2abc26fc EB |
1434 | .procname = "binfmt_misc", |
1435 | .mode = 0555, | |
1436 | .child = binfmt_misc_table, | |
1437 | }, | |
1438 | #endif | |
2be7fe07 AM |
1439 | /* |
1440 | * NOTE: do not add new entries to this table unless you have read | |
1441 | * Documentation/sysctl/ctl_unnumbered.txt | |
2be7fe07 | 1442 | */ |
6fce56ec | 1443 | { } |
1da177e4 LT |
1444 | }; |
1445 | ||
d8217f07 | 1446 | static struct ctl_table debug_table[] = { |
4b177647 | 1447 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) |
abd4f750 | 1448 | { |
abd4f750 MAS |
1449 | .procname = "exception-trace", |
1450 | .data = &show_unhandled_signals, | |
1451 | .maxlen = sizeof(int), | |
1452 | .mode = 0644, | |
1453 | .proc_handler = proc_dointvec | |
1454 | }, | |
b2be84df MH |
1455 | #endif |
1456 | #if defined(CONFIG_OPTPROBES) | |
1457 | { | |
1458 | .procname = "kprobes-optimization", | |
1459 | .data = &sysctl_kprobes_optimization, | |
1460 | .maxlen = sizeof(int), | |
1461 | .mode = 0644, | |
1462 | .proc_handler = proc_kprobes_optimization_handler, | |
1463 | .extra1 = &zero, | |
1464 | .extra2 = &one, | |
1465 | }, | |
abd4f750 | 1466 | #endif |
6fce56ec | 1467 | { } |
1da177e4 LT |
1468 | }; |
1469 | ||
d8217f07 | 1470 | static struct ctl_table dev_table[] = { |
6fce56ec | 1471 | { } |
0eeca283 | 1472 | }; |
1da177e4 | 1473 | |
330d57fb AV |
1474 | static DEFINE_SPINLOCK(sysctl_lock); |
1475 | ||
1476 | /* called under sysctl_lock */ | |
1477 | static int use_table(struct ctl_table_header *p) | |
1478 | { | |
1479 | if (unlikely(p->unregistering)) | |
1480 | return 0; | |
1481 | p->used++; | |
1482 | return 1; | |
1483 | } | |
1484 | ||
1485 | /* called under sysctl_lock */ | |
1486 | static void unuse_table(struct ctl_table_header *p) | |
1487 | { | |
1488 | if (!--p->used) | |
1489 | if (unlikely(p->unregistering)) | |
1490 | complete(p->unregistering); | |
1491 | } | |
1492 | ||
1493 | /* called under sysctl_lock, will reacquire if has to wait */ | |
1494 | static void start_unregistering(struct ctl_table_header *p) | |
1495 | { | |
1496 | /* | |
1497 | * if p->used is 0, nobody will ever touch that entry again; | |
1498 | * we'll eliminate all paths to it before dropping sysctl_lock | |
1499 | */ | |
1500 | if (unlikely(p->used)) { | |
1501 | struct completion wait; | |
1502 | init_completion(&wait); | |
1503 | p->unregistering = &wait; | |
1504 | spin_unlock(&sysctl_lock); | |
1505 | wait_for_completion(&wait); | |
1506 | spin_lock(&sysctl_lock); | |
f7e6ced4 AV |
1507 | } else { |
1508 | /* anything non-NULL; we'll never dereference it */ | |
1509 | p->unregistering = ERR_PTR(-EINVAL); | |
330d57fb AV |
1510 | } |
1511 | /* | |
1512 | * do not remove from the list until nobody holds it; walking the | |
1513 | * list in do_sysctl() relies on that. | |
1514 | */ | |
1515 | list_del_init(&p->ctl_entry); | |
1516 | } | |
1517 | ||
f7e6ced4 AV |
1518 | void sysctl_head_get(struct ctl_table_header *head) |
1519 | { | |
1520 | spin_lock(&sysctl_lock); | |
1521 | head->count++; | |
1522 | spin_unlock(&sysctl_lock); | |
1523 | } | |
1524 | ||
1525 | void sysctl_head_put(struct ctl_table_header *head) | |
1526 | { | |
1527 | spin_lock(&sysctl_lock); | |
1528 | if (!--head->count) | |
1529 | kfree(head); | |
1530 | spin_unlock(&sysctl_lock); | |
1531 | } | |
1532 | ||
1533 | struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head) | |
1534 | { | |
1535 | if (!head) | |
1536 | BUG(); | |
1537 | spin_lock(&sysctl_lock); | |
1538 | if (!use_table(head)) | |
1539 | head = ERR_PTR(-ENOENT); | |
1540 | spin_unlock(&sysctl_lock); | |
1541 | return head; | |
1542 | } | |
1543 | ||
805b5d5e EB |
1544 | void sysctl_head_finish(struct ctl_table_header *head) |
1545 | { | |
1546 | if (!head) | |
1547 | return; | |
1548 | spin_lock(&sysctl_lock); | |
1549 | unuse_table(head); | |
1550 | spin_unlock(&sysctl_lock); | |
1551 | } | |
1552 | ||
73455092 AV |
1553 | static struct ctl_table_set * |
1554 | lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces) | |
1555 | { | |
1556 | struct ctl_table_set *set = &root->default_set; | |
1557 | if (root->lookup) | |
1558 | set = root->lookup(root, namespaces); | |
1559 | return set; | |
1560 | } | |
1561 | ||
e51b6ba0 EB |
1562 | static struct list_head * |
1563 | lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces) | |
805b5d5e | 1564 | { |
73455092 AV |
1565 | struct ctl_table_set *set = lookup_header_set(root, namespaces); |
1566 | return &set->list; | |
e51b6ba0 EB |
1567 | } |
1568 | ||
1569 | struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces, | |
1570 | struct ctl_table_header *prev) | |
1571 | { | |
1572 | struct ctl_table_root *root; | |
1573 | struct list_head *header_list; | |
805b5d5e EB |
1574 | struct ctl_table_header *head; |
1575 | struct list_head *tmp; | |
e51b6ba0 | 1576 | |
805b5d5e EB |
1577 | spin_lock(&sysctl_lock); |
1578 | if (prev) { | |
e51b6ba0 | 1579 | head = prev; |
805b5d5e EB |
1580 | tmp = &prev->ctl_entry; |
1581 | unuse_table(prev); | |
1582 | goto next; | |
1583 | } | |
1584 | tmp = &root_table_header.ctl_entry; | |
1585 | for (;;) { | |
1586 | head = list_entry(tmp, struct ctl_table_header, ctl_entry); | |
1587 | ||
1588 | if (!use_table(head)) | |
1589 | goto next; | |
1590 | spin_unlock(&sysctl_lock); | |
1591 | return head; | |
1592 | next: | |
e51b6ba0 | 1593 | root = head->root; |
805b5d5e | 1594 | tmp = tmp->next; |
e51b6ba0 EB |
1595 | header_list = lookup_header_list(root, namespaces); |
1596 | if (tmp != header_list) | |
1597 | continue; | |
1598 | ||
1599 | do { | |
1600 | root = list_entry(root->root_list.next, | |
1601 | struct ctl_table_root, root_list); | |
1602 | if (root == &sysctl_table_root) | |
1603 | goto out; | |
1604 | header_list = lookup_header_list(root, namespaces); | |
1605 | } while (list_empty(header_list)); | |
1606 | tmp = header_list->next; | |
805b5d5e | 1607 | } |
e51b6ba0 | 1608 | out: |
805b5d5e EB |
1609 | spin_unlock(&sysctl_lock); |
1610 | return NULL; | |
1611 | } | |
1612 | ||
e51b6ba0 EB |
1613 | struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev) |
1614 | { | |
1615 | return __sysctl_head_next(current->nsproxy, prev); | |
1616 | } | |
1617 | ||
1618 | void register_sysctl_root(struct ctl_table_root *root) | |
1619 | { | |
1620 | spin_lock(&sysctl_lock); | |
1621 | list_add_tail(&root->root_list, &sysctl_table_root.root_list); | |
1622 | spin_unlock(&sysctl_lock); | |
1623 | } | |
1624 | ||
1da177e4 | 1625 | /* |
1ff007eb | 1626 | * sysctl_perm does NOT grant the superuser all rights automatically, because |
1da177e4 LT |
1627 | * some sysctl variables are readonly even to root. |
1628 | */ | |
1629 | ||
1630 | static int test_perm(int mode, int op) | |
1631 | { | |
76aac0e9 | 1632 | if (!current_euid()) |
1da177e4 LT |
1633 | mode >>= 6; |
1634 | else if (in_egroup_p(0)) | |
1635 | mode >>= 3; | |
e6305c43 | 1636 | if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0) |
1da177e4 LT |
1637 | return 0; |
1638 | return -EACCES; | |
1639 | } | |
1640 | ||
d7321cd6 | 1641 | int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op) |
1da177e4 LT |
1642 | { |
1643 | int error; | |
d7321cd6 PE |
1644 | int mode; |
1645 | ||
e6305c43 | 1646 | error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC)); |
1da177e4 LT |
1647 | if (error) |
1648 | return error; | |
d7321cd6 PE |
1649 | |
1650 | if (root->permissions) | |
1651 | mode = root->permissions(root, current->nsproxy, table); | |
1652 | else | |
1653 | mode = table->mode; | |
1654 | ||
1655 | return test_perm(mode, op); | |
1da177e4 LT |
1656 | } |
1657 | ||
d912b0cc EB |
1658 | static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table) |
1659 | { | |
2315ffa0 | 1660 | for (; table->procname; table++) { |
d912b0cc EB |
1661 | table->parent = parent; |
1662 | if (table->child) | |
1663 | sysctl_set_parent(table, table->child); | |
1664 | } | |
1665 | } | |
1666 | ||
1667 | static __init int sysctl_init(void) | |
1668 | { | |
1669 | sysctl_set_parent(NULL, root_table); | |
88f458e4 HS |
1670 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
1671 | { | |
1672 | int err; | |
1673 | err = sysctl_check_table(current->nsproxy, root_table); | |
1674 | } | |
1675 | #endif | |
d912b0cc EB |
1676 | return 0; |
1677 | } | |
1678 | ||
1679 | core_initcall(sysctl_init); | |
1680 | ||
bfbcf034 AV |
1681 | static struct ctl_table *is_branch_in(struct ctl_table *branch, |
1682 | struct ctl_table *table) | |
ae7edecc AV |
1683 | { |
1684 | struct ctl_table *p; | |
1685 | const char *s = branch->procname; | |
1686 | ||
1687 | /* branch should have named subdirectory as its first element */ | |
1688 | if (!s || !branch->child) | |
bfbcf034 | 1689 | return NULL; |
ae7edecc AV |
1690 | |
1691 | /* ... and nothing else */ | |
2315ffa0 | 1692 | if (branch[1].procname) |
bfbcf034 | 1693 | return NULL; |
ae7edecc AV |
1694 | |
1695 | /* table should contain subdirectory with the same name */ | |
2315ffa0 | 1696 | for (p = table; p->procname; p++) { |
ae7edecc AV |
1697 | if (!p->child) |
1698 | continue; | |
1699 | if (p->procname && strcmp(p->procname, s) == 0) | |
bfbcf034 | 1700 | return p; |
ae7edecc | 1701 | } |
bfbcf034 | 1702 | return NULL; |
ae7edecc AV |
1703 | } |
1704 | ||
1705 | /* see if attaching q to p would be an improvement */ | |
1706 | static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q) | |
1707 | { | |
1708 | struct ctl_table *to = p->ctl_table, *by = q->ctl_table; | |
bfbcf034 | 1709 | struct ctl_table *next; |
ae7edecc AV |
1710 | int is_better = 0; |
1711 | int not_in_parent = !p->attached_by; | |
1712 | ||
bfbcf034 | 1713 | while ((next = is_branch_in(by, to)) != NULL) { |
ae7edecc AV |
1714 | if (by == q->attached_by) |
1715 | is_better = 1; | |
1716 | if (to == p->attached_by) | |
1717 | not_in_parent = 1; | |
1718 | by = by->child; | |
bfbcf034 | 1719 | to = next->child; |
ae7edecc AV |
1720 | } |
1721 | ||
1722 | if (is_better && not_in_parent) { | |
1723 | q->attached_by = by; | |
1724 | q->attached_to = to; | |
1725 | q->parent = p; | |
1726 | } | |
1727 | } | |
1728 | ||
1da177e4 | 1729 | /** |
e51b6ba0 EB |
1730 | * __register_sysctl_paths - register a sysctl hierarchy |
1731 | * @root: List of sysctl headers to register on | |
1732 | * @namespaces: Data to compute which lists of sysctl entries are visible | |
29e796fd | 1733 | * @path: The path to the directory the sysctl table is in. |
1da177e4 | 1734 | * @table: the top-level table structure |
1da177e4 LT |
1735 | * |
1736 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
29e796fd | 1737 | * array. A completely 0 filled entry terminates the table. |
1da177e4 | 1738 | * |
d8217f07 | 1739 | * The members of the &struct ctl_table structure are used as follows: |
1da177e4 | 1740 | * |
1da177e4 LT |
1741 | * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not |
1742 | * enter a sysctl file | |
1743 | * | |
1744 | * data - a pointer to data for use by proc_handler | |
1745 | * | |
1746 | * maxlen - the maximum size in bytes of the data | |
1747 | * | |
1748 | * mode - the file permissions for the /proc/sys file, and for sysctl(2) | |
1749 | * | |
1750 | * child - a pointer to the child sysctl table if this entry is a directory, or | |
1751 | * %NULL. | |
1752 | * | |
1753 | * proc_handler - the text handler routine (described below) | |
1754 | * | |
1da177e4 LT |
1755 | * de - for internal use by the sysctl routines |
1756 | * | |
1757 | * extra1, extra2 - extra pointers usable by the proc handler routines | |
1758 | * | |
1759 | * Leaf nodes in the sysctl tree will be represented by a single file | |
1760 | * under /proc; non-leaf nodes will be represented by directories. | |
1761 | * | |
1762 | * sysctl(2) can automatically manage read and write requests through | |
1763 | * the sysctl table. The data and maxlen fields of the ctl_table | |
1764 | * struct enable minimal validation of the values being written to be | |
1765 | * performed, and the mode field allows minimal authentication. | |
1766 | * | |
1da177e4 LT |
1767 | * There must be a proc_handler routine for any terminal nodes |
1768 | * mirrored under /proc/sys (non-terminals are handled by a built-in | |
1769 | * directory handler). Several default handlers are available to | |
1770 | * cover common cases - | |
1771 | * | |
1772 | * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(), | |
1773 | * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(), | |
1774 | * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax() | |
1775 | * | |
1776 | * It is the handler's job to read the input buffer from user memory | |
1777 | * and process it. The handler should return 0 on success. | |
1778 | * | |
1779 | * This routine returns %NULL on a failure to register, and a pointer | |
1780 | * to the table header on success. | |
1781 | */ | |
e51b6ba0 EB |
1782 | struct ctl_table_header *__register_sysctl_paths( |
1783 | struct ctl_table_root *root, | |
1784 | struct nsproxy *namespaces, | |
1785 | const struct ctl_path *path, struct ctl_table *table) | |
1da177e4 | 1786 | { |
29e796fd EB |
1787 | struct ctl_table_header *header; |
1788 | struct ctl_table *new, **prevp; | |
1789 | unsigned int n, npath; | |
ae7edecc | 1790 | struct ctl_table_set *set; |
29e796fd EB |
1791 | |
1792 | /* Count the path components */ | |
2315ffa0 | 1793 | for (npath = 0; path[npath].procname; ++npath) |
29e796fd EB |
1794 | ; |
1795 | ||
1796 | /* | |
1797 | * For each path component, allocate a 2-element ctl_table array. | |
1798 | * The first array element will be filled with the sysctl entry | |
2315ffa0 | 1799 | * for this, the second will be the sentinel (procname == 0). |
29e796fd EB |
1800 | * |
1801 | * We allocate everything in one go so that we don't have to | |
1802 | * worry about freeing additional memory in unregister_sysctl_table. | |
1803 | */ | |
1804 | header = kzalloc(sizeof(struct ctl_table_header) + | |
1805 | (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL); | |
1806 | if (!header) | |
1da177e4 | 1807 | return NULL; |
29e796fd EB |
1808 | |
1809 | new = (struct ctl_table *) (header + 1); | |
1810 | ||
1811 | /* Now connect the dots */ | |
1812 | prevp = &header->ctl_table; | |
1813 | for (n = 0; n < npath; ++n, ++path) { | |
1814 | /* Copy the procname */ | |
1815 | new->procname = path->procname; | |
29e796fd EB |
1816 | new->mode = 0555; |
1817 | ||
1818 | *prevp = new; | |
1819 | prevp = &new->child; | |
1820 | ||
1821 | new += 2; | |
1822 | } | |
1823 | *prevp = table; | |
23eb06de | 1824 | header->ctl_table_arg = table; |
29e796fd EB |
1825 | |
1826 | INIT_LIST_HEAD(&header->ctl_entry); | |
1827 | header->used = 0; | |
1828 | header->unregistering = NULL; | |
e51b6ba0 | 1829 | header->root = root; |
29e796fd | 1830 | sysctl_set_parent(NULL, header->ctl_table); |
f7e6ced4 | 1831 | header->count = 1; |
88f458e4 | 1832 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
e51b6ba0 | 1833 | if (sysctl_check_table(namespaces, header->ctl_table)) { |
29e796fd | 1834 | kfree(header); |
fc6cd25b EB |
1835 | return NULL; |
1836 | } | |
88f458e4 | 1837 | #endif |
330d57fb | 1838 | spin_lock(&sysctl_lock); |
73455092 | 1839 | header->set = lookup_header_set(root, namespaces); |
ae7edecc AV |
1840 | header->attached_by = header->ctl_table; |
1841 | header->attached_to = root_table; | |
1842 | header->parent = &root_table_header; | |
1843 | for (set = header->set; set; set = set->parent) { | |
1844 | struct ctl_table_header *p; | |
1845 | list_for_each_entry(p, &set->list, ctl_entry) { | |
1846 | if (p->unregistering) | |
1847 | continue; | |
1848 | try_attach(p, header); | |
1849 | } | |
1850 | } | |
1851 | header->parent->count++; | |
73455092 | 1852 | list_add_tail(&header->ctl_entry, &header->set->list); |
330d57fb | 1853 | spin_unlock(&sysctl_lock); |
29e796fd EB |
1854 | |
1855 | return header; | |
1856 | } | |
1857 | ||
e51b6ba0 EB |
1858 | /** |
1859 | * register_sysctl_table_path - register a sysctl table hierarchy | |
1860 | * @path: The path to the directory the sysctl table is in. | |
1861 | * @table: the top-level table structure | |
1862 | * | |
1863 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
1864 | * array. A completely 0 filled entry terminates the table. | |
1865 | * | |
1866 | * See __register_sysctl_paths for more details. | |
1867 | */ | |
1868 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, | |
1869 | struct ctl_table *table) | |
1870 | { | |
1871 | return __register_sysctl_paths(&sysctl_table_root, current->nsproxy, | |
1872 | path, table); | |
1873 | } | |
1874 | ||
29e796fd EB |
1875 | /** |
1876 | * register_sysctl_table - register a sysctl table hierarchy | |
1877 | * @table: the top-level table structure | |
1878 | * | |
1879 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
1880 | * array. A completely 0 filled entry terminates the table. | |
1881 | * | |
1882 | * See register_sysctl_paths for more details. | |
1883 | */ | |
1884 | struct ctl_table_header *register_sysctl_table(struct ctl_table *table) | |
1885 | { | |
1886 | static const struct ctl_path null_path[] = { {} }; | |
1887 | ||
1888 | return register_sysctl_paths(null_path, table); | |
1da177e4 LT |
1889 | } |
1890 | ||
1891 | /** | |
1892 | * unregister_sysctl_table - unregister a sysctl table hierarchy | |
1893 | * @header: the header returned from register_sysctl_table | |
1894 | * | |
1895 | * Unregisters the sysctl table and all children. proc entries may not | |
1896 | * actually be removed until they are no longer used by anyone. | |
1897 | */ | |
1898 | void unregister_sysctl_table(struct ctl_table_header * header) | |
1899 | { | |
330d57fb | 1900 | might_sleep(); |
f1dad166 PE |
1901 | |
1902 | if (header == NULL) | |
1903 | return; | |
1904 | ||
330d57fb AV |
1905 | spin_lock(&sysctl_lock); |
1906 | start_unregistering(header); | |
ae7edecc AV |
1907 | if (!--header->parent->count) { |
1908 | WARN_ON(1); | |
1909 | kfree(header->parent); | |
1910 | } | |
f7e6ced4 AV |
1911 | if (!--header->count) |
1912 | kfree(header); | |
330d57fb | 1913 | spin_unlock(&sysctl_lock); |
1da177e4 LT |
1914 | } |
1915 | ||
9043476f AV |
1916 | int sysctl_is_seen(struct ctl_table_header *p) |
1917 | { | |
1918 | struct ctl_table_set *set = p->set; | |
1919 | int res; | |
1920 | spin_lock(&sysctl_lock); | |
1921 | if (p->unregistering) | |
1922 | res = 0; | |
1923 | else if (!set->is_seen) | |
1924 | res = 1; | |
1925 | else | |
1926 | res = set->is_seen(set); | |
1927 | spin_unlock(&sysctl_lock); | |
1928 | return res; | |
1929 | } | |
1930 | ||
73455092 AV |
1931 | void setup_sysctl_set(struct ctl_table_set *p, |
1932 | struct ctl_table_set *parent, | |
1933 | int (*is_seen)(struct ctl_table_set *)) | |
1934 | { | |
1935 | INIT_LIST_HEAD(&p->list); | |
1936 | p->parent = parent ? parent : &sysctl_table_root.default_set; | |
1937 | p->is_seen = is_seen; | |
1938 | } | |
1939 | ||
b89a8171 | 1940 | #else /* !CONFIG_SYSCTL */ |
d8217f07 | 1941 | struct ctl_table_header *register_sysctl_table(struct ctl_table * table) |
b89a8171 EB |
1942 | { |
1943 | return NULL; | |
1944 | } | |
1945 | ||
29e796fd EB |
1946 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, |
1947 | struct ctl_table *table) | |
1948 | { | |
1949 | return NULL; | |
1950 | } | |
1951 | ||
b89a8171 EB |
1952 | void unregister_sysctl_table(struct ctl_table_header * table) |
1953 | { | |
1954 | } | |
1955 | ||
73455092 AV |
1956 | void setup_sysctl_set(struct ctl_table_set *p, |
1957 | struct ctl_table_set *parent, | |
1958 | int (*is_seen)(struct ctl_table_set *)) | |
1959 | { | |
1960 | } | |
1961 | ||
f7e6ced4 AV |
1962 | void sysctl_head_put(struct ctl_table_header *head) |
1963 | { | |
1964 | } | |
1965 | ||
b89a8171 EB |
1966 | #endif /* CONFIG_SYSCTL */ |
1967 | ||
1da177e4 LT |
1968 | /* |
1969 | * /proc/sys support | |
1970 | */ | |
1971 | ||
b89a8171 | 1972 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1973 | |
b1ba4ddd | 1974 | static int _proc_do_string(void* data, int maxlen, int write, |
8d65af78 | 1975 | void __user *buffer, |
b1ba4ddd | 1976 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1977 | { |
1978 | size_t len; | |
1979 | char __user *p; | |
1980 | char c; | |
8d060877 ON |
1981 | |
1982 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1983 | *lenp = 0; |
1984 | return 0; | |
1985 | } | |
8d060877 | 1986 | |
1da177e4 LT |
1987 | if (write) { |
1988 | len = 0; | |
1989 | p = buffer; | |
1990 | while (len < *lenp) { | |
1991 | if (get_user(c, p++)) | |
1992 | return -EFAULT; | |
1993 | if (c == 0 || c == '\n') | |
1994 | break; | |
1995 | len++; | |
1996 | } | |
f5dd3d6f SV |
1997 | if (len >= maxlen) |
1998 | len = maxlen-1; | |
1999 | if(copy_from_user(data, buffer, len)) | |
1da177e4 | 2000 | return -EFAULT; |
f5dd3d6f | 2001 | ((char *) data)[len] = 0; |
1da177e4 LT |
2002 | *ppos += *lenp; |
2003 | } else { | |
f5dd3d6f SV |
2004 | len = strlen(data); |
2005 | if (len > maxlen) | |
2006 | len = maxlen; | |
8d060877 ON |
2007 | |
2008 | if (*ppos > len) { | |
2009 | *lenp = 0; | |
2010 | return 0; | |
2011 | } | |
2012 | ||
2013 | data += *ppos; | |
2014 | len -= *ppos; | |
2015 | ||
1da177e4 LT |
2016 | if (len > *lenp) |
2017 | len = *lenp; | |
2018 | if (len) | |
f5dd3d6f | 2019 | if(copy_to_user(buffer, data, len)) |
1da177e4 LT |
2020 | return -EFAULT; |
2021 | if (len < *lenp) { | |
2022 | if(put_user('\n', ((char __user *) buffer) + len)) | |
2023 | return -EFAULT; | |
2024 | len++; | |
2025 | } | |
2026 | *lenp = len; | |
2027 | *ppos += len; | |
2028 | } | |
2029 | return 0; | |
2030 | } | |
2031 | ||
f5dd3d6f SV |
2032 | /** |
2033 | * proc_dostring - read a string sysctl | |
2034 | * @table: the sysctl table | |
2035 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
2036 | * @buffer: the user buffer |
2037 | * @lenp: the size of the user buffer | |
2038 | * @ppos: file position | |
2039 | * | |
2040 | * Reads/writes a string from/to the user buffer. If the kernel | |
2041 | * buffer provided is not large enough to hold the string, the | |
2042 | * string is truncated. The copied string is %NULL-terminated. | |
2043 | * If the string is being read by the user process, it is copied | |
2044 | * and a newline '\n' is added. It is truncated if the buffer is | |
2045 | * not large enough. | |
2046 | * | |
2047 | * Returns 0 on success. | |
2048 | */ | |
8d65af78 | 2049 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2050 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2051 | { | |
8d65af78 | 2052 | return _proc_do_string(table->data, table->maxlen, write, |
f5dd3d6f SV |
2053 | buffer, lenp, ppos); |
2054 | } | |
2055 | ||
1da177e4 LT |
2056 | |
2057 | static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp, | |
2058 | int *valp, | |
2059 | int write, void *data) | |
2060 | { | |
2061 | if (write) { | |
2062 | *valp = *negp ? -*lvalp : *lvalp; | |
2063 | } else { | |
2064 | int val = *valp; | |
2065 | if (val < 0) { | |
2066 | *negp = -1; | |
2067 | *lvalp = (unsigned long)-val; | |
2068 | } else { | |
2069 | *negp = 0; | |
2070 | *lvalp = (unsigned long)val; | |
2071 | } | |
2072 | } | |
2073 | return 0; | |
2074 | } | |
2075 | ||
d8217f07 | 2076 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2077 | int write, void __user *buffer, |
fcfbd547 | 2078 | size_t *lenp, loff_t *ppos, |
1da177e4 LT |
2079 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, |
2080 | int write, void *data), | |
2081 | void *data) | |
2082 | { | |
2083 | #define TMPBUFLEN 21 | |
7338f299 | 2084 | int *i, vleft, first = 1, neg; |
1da177e4 LT |
2085 | unsigned long lval; |
2086 | size_t left, len; | |
2087 | ||
2088 | char buf[TMPBUFLEN], *p; | |
2089 | char __user *s = buffer; | |
2090 | ||
fcfbd547 | 2091 | if (!tbl_data || !table->maxlen || !*lenp || |
1da177e4 LT |
2092 | (*ppos && !write)) { |
2093 | *lenp = 0; | |
2094 | return 0; | |
2095 | } | |
2096 | ||
fcfbd547 | 2097 | i = (int *) tbl_data; |
1da177e4 LT |
2098 | vleft = table->maxlen / sizeof(*i); |
2099 | left = *lenp; | |
2100 | ||
2101 | if (!conv) | |
2102 | conv = do_proc_dointvec_conv; | |
2103 | ||
2104 | for (; left && vleft--; i++, first=0) { | |
2105 | if (write) { | |
2106 | while (left) { | |
2107 | char c; | |
2108 | if (get_user(c, s)) | |
2109 | return -EFAULT; | |
2110 | if (!isspace(c)) | |
2111 | break; | |
2112 | left--; | |
2113 | s++; | |
2114 | } | |
2115 | if (!left) | |
2116 | break; | |
2117 | neg = 0; | |
2118 | len = left; | |
2119 | if (len > sizeof(buf) - 1) | |
2120 | len = sizeof(buf) - 1; | |
2121 | if (copy_from_user(buf, s, len)) | |
2122 | return -EFAULT; | |
2123 | buf[len] = 0; | |
2124 | p = buf; | |
2125 | if (*p == '-' && left > 1) { | |
2126 | neg = 1; | |
bd9b0bac | 2127 | p++; |
1da177e4 LT |
2128 | } |
2129 | if (*p < '0' || *p > '9') | |
2130 | break; | |
2131 | ||
2132 | lval = simple_strtoul(p, &p, 0); | |
2133 | ||
2134 | len = p-buf; | |
2135 | if ((len < left) && *p && !isspace(*p)) | |
2136 | break; | |
1da177e4 LT |
2137 | s += len; |
2138 | left -= len; | |
2139 | ||
2140 | if (conv(&neg, &lval, i, 1, data)) | |
2141 | break; | |
2142 | } else { | |
2143 | p = buf; | |
2144 | if (!first) | |
2145 | *p++ = '\t'; | |
2146 | ||
2147 | if (conv(&neg, &lval, i, 0, data)) | |
2148 | break; | |
2149 | ||
2150 | sprintf(p, "%s%lu", neg ? "-" : "", lval); | |
2151 | len = strlen(buf); | |
2152 | if (len > left) | |
2153 | len = left; | |
2154 | if(copy_to_user(s, buf, len)) | |
2155 | return -EFAULT; | |
2156 | left -= len; | |
2157 | s += len; | |
2158 | } | |
2159 | } | |
2160 | ||
2161 | if (!write && !first && left) { | |
2162 | if(put_user('\n', s)) | |
2163 | return -EFAULT; | |
2164 | left--, s++; | |
2165 | } | |
2166 | if (write) { | |
2167 | while (left) { | |
2168 | char c; | |
2169 | if (get_user(c, s++)) | |
2170 | return -EFAULT; | |
2171 | if (!isspace(c)) | |
2172 | break; | |
2173 | left--; | |
2174 | } | |
2175 | } | |
2176 | if (write && first) | |
2177 | return -EINVAL; | |
2178 | *lenp -= left; | |
2179 | *ppos += *lenp; | |
2180 | return 0; | |
2181 | #undef TMPBUFLEN | |
2182 | } | |
2183 | ||
8d65af78 | 2184 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 KK |
2185 | void __user *buffer, size_t *lenp, loff_t *ppos, |
2186 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, | |
2187 | int write, void *data), | |
2188 | void *data) | |
2189 | { | |
8d65af78 | 2190 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2191 | buffer, lenp, ppos, conv, data); |
2192 | } | |
2193 | ||
1da177e4 LT |
2194 | /** |
2195 | * proc_dointvec - read a vector of integers | |
2196 | * @table: the sysctl table | |
2197 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2198 | * @buffer: the user buffer |
2199 | * @lenp: the size of the user buffer | |
2200 | * @ppos: file position | |
2201 | * | |
2202 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2203 | * values from/to the user buffer, treated as an ASCII string. | |
2204 | * | |
2205 | * Returns 0 on success. | |
2206 | */ | |
8d65af78 | 2207 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2208 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2209 | { | |
8d65af78 | 2210 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2211 | NULL,NULL); |
2212 | } | |
2213 | ||
34f5a398 | 2214 | /* |
25ddbb18 AK |
2215 | * Taint values can only be increased |
2216 | * This means we can safely use a temporary. | |
34f5a398 | 2217 | */ |
8d65af78 | 2218 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2219 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2220 | { | |
25ddbb18 AK |
2221 | struct ctl_table t; |
2222 | unsigned long tmptaint = get_taint(); | |
2223 | int err; | |
34f5a398 | 2224 | |
91fcd412 | 2225 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2226 | return -EPERM; |
2227 | ||
25ddbb18 AK |
2228 | t = *table; |
2229 | t.data = &tmptaint; | |
8d65af78 | 2230 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2231 | if (err < 0) |
2232 | return err; | |
2233 | ||
2234 | if (write) { | |
2235 | /* | |
2236 | * Poor man's atomic or. Not worth adding a primitive | |
2237 | * to everyone's atomic.h for this | |
2238 | */ | |
2239 | int i; | |
2240 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2241 | if ((tmptaint >> i) & 1) | |
2242 | add_taint(i); | |
2243 | } | |
2244 | } | |
2245 | ||
2246 | return err; | |
34f5a398 TT |
2247 | } |
2248 | ||
1da177e4 LT |
2249 | struct do_proc_dointvec_minmax_conv_param { |
2250 | int *min; | |
2251 | int *max; | |
2252 | }; | |
2253 | ||
2254 | static int do_proc_dointvec_minmax_conv(int *negp, unsigned long *lvalp, | |
2255 | int *valp, | |
2256 | int write, void *data) | |
2257 | { | |
2258 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2259 | if (write) { | |
2260 | int val = *negp ? -*lvalp : *lvalp; | |
2261 | if ((param->min && *param->min > val) || | |
2262 | (param->max && *param->max < val)) | |
2263 | return -EINVAL; | |
2264 | *valp = val; | |
2265 | } else { | |
2266 | int val = *valp; | |
2267 | if (val < 0) { | |
2268 | *negp = -1; | |
2269 | *lvalp = (unsigned long)-val; | |
2270 | } else { | |
2271 | *negp = 0; | |
2272 | *lvalp = (unsigned long)val; | |
2273 | } | |
2274 | } | |
2275 | return 0; | |
2276 | } | |
2277 | ||
2278 | /** | |
2279 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2280 | * @table: the sysctl table | |
2281 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2282 | * @buffer: the user buffer |
2283 | * @lenp: the size of the user buffer | |
2284 | * @ppos: file position | |
2285 | * | |
2286 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2287 | * values from/to the user buffer, treated as an ASCII string. | |
2288 | * | |
2289 | * This routine will ensure the values are within the range specified by | |
2290 | * table->extra1 (min) and table->extra2 (max). | |
2291 | * | |
2292 | * Returns 0 on success. | |
2293 | */ | |
8d65af78 | 2294 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2295 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2296 | { | |
2297 | struct do_proc_dointvec_minmax_conv_param param = { | |
2298 | .min = (int *) table->extra1, | |
2299 | .max = (int *) table->extra2, | |
2300 | }; | |
8d65af78 | 2301 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2302 | do_proc_dointvec_minmax_conv, ¶m); |
2303 | } | |
2304 | ||
d8217f07 | 2305 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2306 | void __user *buffer, |
2307 | size_t *lenp, loff_t *ppos, | |
2308 | unsigned long convmul, | |
2309 | unsigned long convdiv) | |
2310 | { | |
2311 | #define TMPBUFLEN 21 | |
2312 | unsigned long *i, *min, *max, val; | |
2313 | int vleft, first=1, neg; | |
2314 | size_t len, left; | |
2315 | char buf[TMPBUFLEN], *p; | |
2316 | char __user *s = buffer; | |
2317 | ||
fcfbd547 | 2318 | if (!data || !table->maxlen || !*lenp || |
1da177e4 LT |
2319 | (*ppos && !write)) { |
2320 | *lenp = 0; | |
2321 | return 0; | |
2322 | } | |
2323 | ||
fcfbd547 | 2324 | i = (unsigned long *) data; |
1da177e4 LT |
2325 | min = (unsigned long *) table->extra1; |
2326 | max = (unsigned long *) table->extra2; | |
2327 | vleft = table->maxlen / sizeof(unsigned long); | |
2328 | left = *lenp; | |
2329 | ||
2330 | for (; left && vleft--; i++, min++, max++, first=0) { | |
2331 | if (write) { | |
2332 | while (left) { | |
2333 | char c; | |
2334 | if (get_user(c, s)) | |
2335 | return -EFAULT; | |
2336 | if (!isspace(c)) | |
2337 | break; | |
2338 | left--; | |
2339 | s++; | |
2340 | } | |
2341 | if (!left) | |
2342 | break; | |
2343 | neg = 0; | |
2344 | len = left; | |
2345 | if (len > TMPBUFLEN-1) | |
2346 | len = TMPBUFLEN-1; | |
2347 | if (copy_from_user(buf, s, len)) | |
2348 | return -EFAULT; | |
2349 | buf[len] = 0; | |
2350 | p = buf; | |
2351 | if (*p == '-' && left > 1) { | |
2352 | neg = 1; | |
bd9b0bac | 2353 | p++; |
1da177e4 LT |
2354 | } |
2355 | if (*p < '0' || *p > '9') | |
2356 | break; | |
2357 | val = simple_strtoul(p, &p, 0) * convmul / convdiv ; | |
2358 | len = p-buf; | |
2359 | if ((len < left) && *p && !isspace(*p)) | |
2360 | break; | |
2361 | if (neg) | |
2362 | val = -val; | |
2363 | s += len; | |
2364 | left -= len; | |
2365 | ||
2366 | if(neg) | |
2367 | continue; | |
2368 | if ((min && val < *min) || (max && val > *max)) | |
2369 | continue; | |
2370 | *i = val; | |
2371 | } else { | |
2372 | p = buf; | |
2373 | if (!first) | |
2374 | *p++ = '\t'; | |
2375 | sprintf(p, "%lu", convdiv * (*i) / convmul); | |
2376 | len = strlen(buf); | |
2377 | if (len > left) | |
2378 | len = left; | |
2379 | if(copy_to_user(s, buf, len)) | |
2380 | return -EFAULT; | |
2381 | left -= len; | |
2382 | s += len; | |
2383 | } | |
2384 | } | |
2385 | ||
2386 | if (!write && !first && left) { | |
2387 | if(put_user('\n', s)) | |
2388 | return -EFAULT; | |
2389 | left--, s++; | |
2390 | } | |
2391 | if (write) { | |
2392 | while (left) { | |
2393 | char c; | |
2394 | if (get_user(c, s++)) | |
2395 | return -EFAULT; | |
2396 | if (!isspace(c)) | |
2397 | break; | |
2398 | left--; | |
2399 | } | |
2400 | } | |
2401 | if (write && first) | |
2402 | return -EINVAL; | |
2403 | *lenp -= left; | |
2404 | *ppos += *lenp; | |
2405 | return 0; | |
2406 | #undef TMPBUFLEN | |
2407 | } | |
2408 | ||
d8217f07 | 2409 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2410 | void __user *buffer, |
2411 | size_t *lenp, loff_t *ppos, | |
2412 | unsigned long convmul, | |
2413 | unsigned long convdiv) | |
2414 | { | |
2415 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2416 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2417 | } |
2418 | ||
1da177e4 LT |
2419 | /** |
2420 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2421 | * @table: the sysctl table | |
2422 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2423 | * @buffer: the user buffer |
2424 | * @lenp: the size of the user buffer | |
2425 | * @ppos: file position | |
2426 | * | |
2427 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2428 | * values from/to the user buffer, treated as an ASCII string. | |
2429 | * | |
2430 | * This routine will ensure the values are within the range specified by | |
2431 | * table->extra1 (min) and table->extra2 (max). | |
2432 | * | |
2433 | * Returns 0 on success. | |
2434 | */ | |
8d65af78 | 2435 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2436 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2437 | { | |
8d65af78 | 2438 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2439 | } |
2440 | ||
2441 | /** | |
2442 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2443 | * @table: the sysctl table | |
2444 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2445 | * @buffer: the user buffer |
2446 | * @lenp: the size of the user buffer | |
2447 | * @ppos: file position | |
2448 | * | |
2449 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2450 | * values from/to the user buffer, treated as an ASCII string. The values | |
2451 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2452 | * | |
2453 | * This routine will ensure the values are within the range specified by | |
2454 | * table->extra1 (min) and table->extra2 (max). | |
2455 | * | |
2456 | * Returns 0 on success. | |
2457 | */ | |
d8217f07 | 2458 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2459 | void __user *buffer, |
2460 | size_t *lenp, loff_t *ppos) | |
2461 | { | |
8d65af78 | 2462 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2463 | lenp, ppos, HZ, 1000l); |
2464 | } | |
2465 | ||
2466 | ||
2467 | static int do_proc_dointvec_jiffies_conv(int *negp, unsigned long *lvalp, | |
2468 | int *valp, | |
2469 | int write, void *data) | |
2470 | { | |
2471 | if (write) { | |
cba9f33d BS |
2472 | if (*lvalp > LONG_MAX / HZ) |
2473 | return 1; | |
1da177e4 LT |
2474 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2475 | } else { | |
2476 | int val = *valp; | |
2477 | unsigned long lval; | |
2478 | if (val < 0) { | |
2479 | *negp = -1; | |
2480 | lval = (unsigned long)-val; | |
2481 | } else { | |
2482 | *negp = 0; | |
2483 | lval = (unsigned long)val; | |
2484 | } | |
2485 | *lvalp = lval / HZ; | |
2486 | } | |
2487 | return 0; | |
2488 | } | |
2489 | ||
2490 | static int do_proc_dointvec_userhz_jiffies_conv(int *negp, unsigned long *lvalp, | |
2491 | int *valp, | |
2492 | int write, void *data) | |
2493 | { | |
2494 | if (write) { | |
cba9f33d BS |
2495 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2496 | return 1; | |
1da177e4 LT |
2497 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2498 | } else { | |
2499 | int val = *valp; | |
2500 | unsigned long lval; | |
2501 | if (val < 0) { | |
2502 | *negp = -1; | |
2503 | lval = (unsigned long)-val; | |
2504 | } else { | |
2505 | *negp = 0; | |
2506 | lval = (unsigned long)val; | |
2507 | } | |
2508 | *lvalp = jiffies_to_clock_t(lval); | |
2509 | } | |
2510 | return 0; | |
2511 | } | |
2512 | ||
2513 | static int do_proc_dointvec_ms_jiffies_conv(int *negp, unsigned long *lvalp, | |
2514 | int *valp, | |
2515 | int write, void *data) | |
2516 | { | |
2517 | if (write) { | |
2518 | *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); | |
2519 | } else { | |
2520 | int val = *valp; | |
2521 | unsigned long lval; | |
2522 | if (val < 0) { | |
2523 | *negp = -1; | |
2524 | lval = (unsigned long)-val; | |
2525 | } else { | |
2526 | *negp = 0; | |
2527 | lval = (unsigned long)val; | |
2528 | } | |
2529 | *lvalp = jiffies_to_msecs(lval); | |
2530 | } | |
2531 | return 0; | |
2532 | } | |
2533 | ||
2534 | /** | |
2535 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2536 | * @table: the sysctl table | |
2537 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2538 | * @buffer: the user buffer |
2539 | * @lenp: the size of the user buffer | |
2540 | * @ppos: file position | |
2541 | * | |
2542 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2543 | * values from/to the user buffer, treated as an ASCII string. | |
2544 | * The values read are assumed to be in seconds, and are converted into | |
2545 | * jiffies. | |
2546 | * | |
2547 | * Returns 0 on success. | |
2548 | */ | |
8d65af78 | 2549 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2550 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2551 | { | |
8d65af78 | 2552 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2553 | do_proc_dointvec_jiffies_conv,NULL); |
2554 | } | |
2555 | ||
2556 | /** | |
2557 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2558 | * @table: the sysctl table | |
2559 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2560 | * @buffer: the user buffer |
2561 | * @lenp: the size of the user buffer | |
1e5d5331 | 2562 | * @ppos: pointer to the file position |
1da177e4 LT |
2563 | * |
2564 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2565 | * values from/to the user buffer, treated as an ASCII string. | |
2566 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2567 | * are converted into jiffies. | |
2568 | * | |
2569 | * Returns 0 on success. | |
2570 | */ | |
8d65af78 | 2571 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2572 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2573 | { | |
8d65af78 | 2574 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2575 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2576 | } | |
2577 | ||
2578 | /** | |
2579 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2580 | * @table: the sysctl table | |
2581 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2582 | * @buffer: the user buffer |
2583 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2584 | * @ppos: file position |
2585 | * @ppos: the current position in the file | |
1da177e4 LT |
2586 | * |
2587 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2588 | * values from/to the user buffer, treated as an ASCII string. | |
2589 | * The values read are assumed to be in 1/1000 seconds, and | |
2590 | * are converted into jiffies. | |
2591 | * | |
2592 | * Returns 0 on success. | |
2593 | */ | |
8d65af78 | 2594 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2595 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2596 | { | |
8d65af78 | 2597 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2598 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2599 | } | |
2600 | ||
8d65af78 | 2601 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2602 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2603 | { | |
2604 | struct pid *new_pid; | |
2605 | pid_t tmp; | |
2606 | int r; | |
2607 | ||
6c5f3e7b | 2608 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2609 | |
8d65af78 | 2610 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2611 | lenp, ppos, NULL, NULL); |
2612 | if (r || !write) | |
2613 | return r; | |
2614 | ||
2615 | new_pid = find_get_pid(tmp); | |
2616 | if (!new_pid) | |
2617 | return -ESRCH; | |
2618 | ||
2619 | put_pid(xchg(&cad_pid, new_pid)); | |
2620 | return 0; | |
2621 | } | |
2622 | ||
1da177e4 LT |
2623 | #else /* CONFIG_PROC_FS */ |
2624 | ||
8d65af78 | 2625 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2626 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2627 | { | |
2628 | return -ENOSYS; | |
2629 | } | |
2630 | ||
8d65af78 | 2631 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2632 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2633 | { |
2634 | return -ENOSYS; | |
2635 | } | |
2636 | ||
8d65af78 | 2637 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2638 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2639 | { | |
2640 | return -ENOSYS; | |
2641 | } | |
2642 | ||
8d65af78 | 2643 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2644 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2645 | { | |
2646 | return -ENOSYS; | |
2647 | } | |
2648 | ||
8d65af78 | 2649 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2650 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2651 | { | |
2652 | return -ENOSYS; | |
2653 | } | |
2654 | ||
8d65af78 | 2655 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2656 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2657 | { | |
2658 | return -ENOSYS; | |
2659 | } | |
2660 | ||
8d65af78 | 2661 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2662 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2663 | { | |
2664 | return -ENOSYS; | |
2665 | } | |
2666 | ||
d8217f07 | 2667 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2668 | void __user *buffer, |
2669 | size_t *lenp, loff_t *ppos) | |
2670 | { | |
2671 | return -ENOSYS; | |
2672 | } | |
2673 | ||
2674 | ||
2675 | #endif /* CONFIG_PROC_FS */ | |
2676 | ||
1da177e4 LT |
2677 | /* |
2678 | * No sense putting this after each symbol definition, twice, | |
2679 | * exception granted :-) | |
2680 | */ | |
2681 | EXPORT_SYMBOL(proc_dointvec); | |
2682 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2683 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2684 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2685 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2686 | EXPORT_SYMBOL(proc_dostring); | |
2687 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2688 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); | |
2689 | EXPORT_SYMBOL(register_sysctl_table); | |
29e796fd | 2690 | EXPORT_SYMBOL(register_sysctl_paths); |
1da177e4 | 2691 | EXPORT_SYMBOL(unregister_sysctl_table); |