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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 |
15485a46 DY |
64 | #ifdef CONFIG_CHR_DEV_SG |
65 | #include <scsi/sg.h> | |
66 | #endif | |
29cbc78b | 67 | |
7058cb02 | 68 | |
1da177e4 LT |
69 | #if defined(CONFIG_SYSCTL) |
70 | ||
71 | /* External variables not in a header file. */ | |
1da177e4 LT |
72 | extern int sysctl_overcommit_memory; |
73 | extern int sysctl_overcommit_ratio; | |
fadd8fbd | 74 | extern int sysctl_panic_on_oom; |
fe071d7e | 75 | extern int sysctl_oom_kill_allocating_task; |
fef1bdd6 | 76 | extern int sysctl_oom_dump_tasks; |
1da177e4 | 77 | extern int max_threads; |
1da177e4 | 78 | extern int core_uses_pid; |
d6e71144 | 79 | extern int suid_dumpable; |
1da177e4 | 80 | extern char core_pattern[]; |
a293980c | 81 | extern unsigned int core_pipe_limit; |
1da177e4 LT |
82 | extern int pid_max; |
83 | extern int min_free_kbytes; | |
1da177e4 | 84 | extern int pid_max_min, pid_max_max; |
9d0243bc | 85 | extern int sysctl_drop_caches; |
8ad4b1fb | 86 | extern int percpu_pagelist_fraction; |
bebfa101 | 87 | extern int compat_log; |
9745512c | 88 | extern int latencytop_enabled; |
eceea0b3 | 89 | extern int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
90 | #ifndef CONFIG_MMU |
91 | extern int sysctl_nr_trim_pages; | |
92 | #endif | |
cb684b5b | 93 | #ifdef CONFIG_BLOCK |
5e605b64 | 94 | extern int blk_iopoll_enabled; |
cb684b5b | 95 | #endif |
1da177e4 | 96 | |
c4f3b63f | 97 | /* Constants used for minimum and maximum */ |
195cf453 | 98 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
c4f3b63f | 99 | static int sixty = 60; |
9383d967 | 100 | static int neg_one = -1; |
c4f3b63f RT |
101 | #endif |
102 | ||
c4f3b63f | 103 | static int zero; |
cd5f9a4c LT |
104 | static int __maybe_unused one = 1; |
105 | static int __maybe_unused two = 2; | |
fc3501d4 | 106 | static unsigned long one_ul = 1; |
c4f3b63f | 107 | static int one_hundred = 100; |
af91322e DY |
108 | #ifdef CONFIG_PRINTK |
109 | static int ten_thousand = 10000; | |
110 | #endif | |
c4f3b63f | 111 | |
9e4a5bda AR |
112 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
113 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
114 | ||
1da177e4 LT |
115 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
116 | static int maxolduid = 65535; | |
117 | static int minolduid; | |
8ad4b1fb | 118 | static int min_percpu_pagelist_fract = 8; |
1da177e4 LT |
119 | |
120 | static int ngroups_max = NGROUPS_MAX; | |
121 | ||
72c57ed5 | 122 | #ifdef CONFIG_SPARC |
17f04fbb | 123 | #include <asm/system.h> |
1da177e4 LT |
124 | #endif |
125 | ||
0871420f DM |
126 | #ifdef CONFIG_SPARC64 |
127 | extern int sysctl_tsb_ratio; | |
128 | #endif | |
129 | ||
1da177e4 LT |
130 | #ifdef __hppa__ |
131 | extern int pwrsw_enabled; | |
132 | extern int unaligned_enabled; | |
133 | #endif | |
134 | ||
347a8dc3 | 135 | #ifdef CONFIG_S390 |
1da177e4 LT |
136 | #ifdef CONFIG_MATHEMU |
137 | extern int sysctl_ieee_emulation_warnings; | |
138 | #endif | |
139 | extern int sysctl_userprocess_debug; | |
951f22d5 | 140 | extern int spin_retry; |
1da177e4 LT |
141 | #endif |
142 | ||
1da177e4 LT |
143 | #ifdef CONFIG_BSD_PROCESS_ACCT |
144 | extern int acct_parm[]; | |
145 | #endif | |
146 | ||
d2b176ed JS |
147 | #ifdef CONFIG_IA64 |
148 | extern int no_unaligned_warning; | |
88fc241f | 149 | extern int unaligned_dump_stack; |
d2b176ed JS |
150 | #endif |
151 | ||
3fff4c42 IM |
152 | extern struct ratelimit_state printk_ratelimit_state; |
153 | ||
23f78d4a IM |
154 | #ifdef CONFIG_RT_MUTEXES |
155 | extern int max_lock_depth; | |
156 | #endif | |
157 | ||
d6f8ff73 | 158 | #ifdef CONFIG_PROC_SYSCTL |
8d65af78 | 159 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 160 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 161 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 162 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 163 | #endif |
9ec52099 | 164 | |
d8217f07 | 165 | static struct ctl_table root_table[]; |
e51b6ba0 EB |
166 | static struct ctl_table_root sysctl_table_root; |
167 | static struct ctl_table_header root_table_header = { | |
b380b0d4 | 168 | .count = 1, |
e51b6ba0 | 169 | .ctl_table = root_table, |
73455092 | 170 | .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list), |
e51b6ba0 | 171 | .root = &sysctl_table_root, |
73455092 | 172 | .set = &sysctl_table_root.default_set, |
e51b6ba0 EB |
173 | }; |
174 | static struct ctl_table_root sysctl_table_root = { | |
175 | .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list), | |
73455092 | 176 | .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry), |
e51b6ba0 | 177 | }; |
1da177e4 | 178 | |
d8217f07 EB |
179 | static struct ctl_table kern_table[]; |
180 | static struct ctl_table vm_table[]; | |
181 | static struct ctl_table fs_table[]; | |
182 | static struct ctl_table debug_table[]; | |
183 | static struct ctl_table dev_table[]; | |
184 | extern struct ctl_table random_table[]; | |
2d9048e2 | 185 | #ifdef CONFIG_INOTIFY_USER |
d8217f07 | 186 | extern struct ctl_table inotify_table[]; |
0399cb08 | 187 | #endif |
7ef9964e DL |
188 | #ifdef CONFIG_EPOLL |
189 | extern struct ctl_table epoll_table[]; | |
190 | #endif | |
1da177e4 LT |
191 | |
192 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
193 | int sysctl_legacy_va_layout; | |
194 | #endif | |
195 | ||
f20786ff PZ |
196 | extern int prove_locking; |
197 | extern int lock_stat; | |
9bc9a6bd | 198 | |
1da177e4 LT |
199 | /* The default sysctl tables: */ |
200 | ||
d8217f07 | 201 | static struct ctl_table root_table[] = { |
1da177e4 | 202 | { |
1da177e4 LT |
203 | .procname = "kernel", |
204 | .mode = 0555, | |
205 | .child = kern_table, | |
206 | }, | |
207 | { | |
1da177e4 LT |
208 | .procname = "vm", |
209 | .mode = 0555, | |
210 | .child = vm_table, | |
211 | }, | |
1da177e4 | 212 | { |
1da177e4 LT |
213 | .procname = "fs", |
214 | .mode = 0555, | |
215 | .child = fs_table, | |
216 | }, | |
217 | { | |
1da177e4 LT |
218 | .procname = "debug", |
219 | .mode = 0555, | |
220 | .child = debug_table, | |
221 | }, | |
222 | { | |
1da177e4 LT |
223 | .procname = "dev", |
224 | .mode = 0555, | |
225 | .child = dev_table, | |
226 | }, | |
2be7fe07 AM |
227 | /* |
228 | * NOTE: do not add new entries to this table unless you have read | |
229 | * Documentation/sysctl/ctl_unnumbered.txt | |
230 | */ | |
6fce56ec | 231 | { } |
1da177e4 LT |
232 | }; |
233 | ||
77e54a1f | 234 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
235 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
236 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
237 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
238 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
1983a922 CE |
239 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
240 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
acb4a848 CE |
241 | static int min_sched_shares_ratelimit = 100000; /* 100 usec */ |
242 | static int max_sched_shares_ratelimit = NSEC_PER_SEC; /* 1 second */ | |
77e54a1f IM |
243 | #endif |
244 | ||
d8217f07 | 245 | static struct ctl_table kern_table[] = { |
2bba22c5 | 246 | { |
2bba22c5 MG |
247 | .procname = "sched_child_runs_first", |
248 | .data = &sysctl_sched_child_runs_first, | |
249 | .maxlen = sizeof(unsigned int), | |
250 | .mode = 0644, | |
6d456111 | 251 | .proc_handler = proc_dointvec, |
2bba22c5 | 252 | }, |
77e54a1f IM |
253 | #ifdef CONFIG_SCHED_DEBUG |
254 | { | |
b2be5e96 PZ |
255 | .procname = "sched_min_granularity_ns", |
256 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
257 | .maxlen = sizeof(unsigned int), |
258 | .mode = 0644, | |
702a7c76 | 259 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
260 | .extra1 = &min_sched_granularity_ns, |
261 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 262 | }, |
21805085 | 263 | { |
21805085 PZ |
264 | .procname = "sched_latency_ns", |
265 | .data = &sysctl_sched_latency, | |
266 | .maxlen = sizeof(unsigned int), | |
267 | .mode = 0644, | |
702a7c76 | 268 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
269 | .extra1 = &min_sched_granularity_ns, |
270 | .extra2 = &max_sched_granularity_ns, | |
271 | }, | |
77e54a1f | 272 | { |
77e54a1f IM |
273 | .procname = "sched_wakeup_granularity_ns", |
274 | .data = &sysctl_sched_wakeup_granularity, | |
275 | .maxlen = sizeof(unsigned int), | |
276 | .mode = 0644, | |
702a7c76 | 277 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
278 | .extra1 = &min_wakeup_granularity_ns, |
279 | .extra2 = &max_wakeup_granularity_ns, | |
280 | }, | |
2398f2c6 | 281 | { |
2398f2c6 PZ |
282 | .procname = "sched_shares_ratelimit", |
283 | .data = &sysctl_sched_shares_ratelimit, | |
284 | .maxlen = sizeof(unsigned int), | |
285 | .mode = 0644, | |
702a7c76 | 286 | .proc_handler = sched_proc_update_handler, |
acb4a848 CE |
287 | .extra1 = &min_sched_shares_ratelimit, |
288 | .extra2 = &max_sched_shares_ratelimit, | |
2398f2c6 | 289 | }, |
1983a922 | 290 | { |
1983a922 CE |
291 | .procname = "sched_tunable_scaling", |
292 | .data = &sysctl_sched_tunable_scaling, | |
293 | .maxlen = sizeof(enum sched_tunable_scaling), | |
294 | .mode = 0644, | |
702a7c76 | 295 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
296 | .extra1 = &min_sched_tunable_scaling, |
297 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 298 | }, |
ffda12a1 | 299 | { |
ffda12a1 PZ |
300 | .procname = "sched_shares_thresh", |
301 | .data = &sysctl_sched_shares_thresh, | |
302 | .maxlen = sizeof(unsigned int), | |
303 | .mode = 0644, | |
6d456111 | 304 | .proc_handler = proc_dointvec_minmax, |
ffda12a1 PZ |
305 | .extra1 = &zero, |
306 | }, | |
da84d961 | 307 | { |
da84d961 IM |
308 | .procname = "sched_migration_cost", |
309 | .data = &sysctl_sched_migration_cost, | |
310 | .maxlen = sizeof(unsigned int), | |
311 | .mode = 0644, | |
6d456111 | 312 | .proc_handler = proc_dointvec, |
da84d961 | 313 | }, |
b82d9fdd | 314 | { |
b82d9fdd PZ |
315 | .procname = "sched_nr_migrate", |
316 | .data = &sysctl_sched_nr_migrate, | |
317 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 318 | .mode = 0644, |
6d456111 | 319 | .proc_handler = proc_dointvec, |
fa85ae24 | 320 | }, |
e9e9250b | 321 | { |
e9e9250b PZ |
322 | .procname = "sched_time_avg", |
323 | .data = &sysctl_sched_time_avg, | |
324 | .maxlen = sizeof(unsigned int), | |
325 | .mode = 0644, | |
6d456111 | 326 | .proc_handler = proc_dointvec, |
e9e9250b | 327 | }, |
cd1bb94b | 328 | { |
cd1bb94b AB |
329 | .procname = "timer_migration", |
330 | .data = &sysctl_timer_migration, | |
331 | .maxlen = sizeof(unsigned int), | |
332 | .mode = 0644, | |
6d456111 | 333 | .proc_handler = proc_dointvec_minmax, |
bfdb4d9f AB |
334 | .extra1 = &zero, |
335 | .extra2 = &one, | |
fa85ae24 | 336 | }, |
1fc84aaa | 337 | #endif |
9f0c1e56 | 338 | { |
9f0c1e56 PZ |
339 | .procname = "sched_rt_period_us", |
340 | .data = &sysctl_sched_rt_period, | |
341 | .maxlen = sizeof(unsigned int), | |
342 | .mode = 0644, | |
6d456111 | 343 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
344 | }, |
345 | { | |
9f0c1e56 PZ |
346 | .procname = "sched_rt_runtime_us", |
347 | .data = &sysctl_sched_rt_runtime, | |
348 | .maxlen = sizeof(int), | |
349 | .mode = 0644, | |
6d456111 | 350 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 351 | }, |
1799e35d | 352 | { |
1799e35d IM |
353 | .procname = "sched_compat_yield", |
354 | .data = &sysctl_sched_compat_yield, | |
355 | .maxlen = sizeof(unsigned int), | |
356 | .mode = 0644, | |
6d456111 | 357 | .proc_handler = proc_dointvec, |
1799e35d | 358 | }, |
f20786ff PZ |
359 | #ifdef CONFIG_PROVE_LOCKING |
360 | { | |
f20786ff PZ |
361 | .procname = "prove_locking", |
362 | .data = &prove_locking, | |
363 | .maxlen = sizeof(int), | |
364 | .mode = 0644, | |
6d456111 | 365 | .proc_handler = proc_dointvec, |
f20786ff PZ |
366 | }, |
367 | #endif | |
368 | #ifdef CONFIG_LOCK_STAT | |
369 | { | |
f20786ff PZ |
370 | .procname = "lock_stat", |
371 | .data = &lock_stat, | |
372 | .maxlen = sizeof(int), | |
373 | .mode = 0644, | |
6d456111 | 374 | .proc_handler = proc_dointvec, |
f20786ff | 375 | }, |
77e54a1f | 376 | #endif |
1da177e4 | 377 | { |
1da177e4 LT |
378 | .procname = "panic", |
379 | .data = &panic_timeout, | |
380 | .maxlen = sizeof(int), | |
381 | .mode = 0644, | |
6d456111 | 382 | .proc_handler = proc_dointvec, |
1da177e4 LT |
383 | }, |
384 | { | |
1da177e4 LT |
385 | .procname = "core_uses_pid", |
386 | .data = &core_uses_pid, | |
387 | .maxlen = sizeof(int), | |
388 | .mode = 0644, | |
6d456111 | 389 | .proc_handler = proc_dointvec, |
1da177e4 LT |
390 | }, |
391 | { | |
1da177e4 LT |
392 | .procname = "core_pattern", |
393 | .data = core_pattern, | |
71ce92f3 | 394 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 395 | .mode = 0644, |
6d456111 | 396 | .proc_handler = proc_dostring, |
1da177e4 | 397 | }, |
a293980c | 398 | { |
a293980c NH |
399 | .procname = "core_pipe_limit", |
400 | .data = &core_pipe_limit, | |
401 | .maxlen = sizeof(unsigned int), | |
402 | .mode = 0644, | |
6d456111 | 403 | .proc_handler = proc_dointvec, |
a293980c | 404 | }, |
34f5a398 | 405 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 406 | { |
1da177e4 | 407 | .procname = "tainted", |
25ddbb18 | 408 | .maxlen = sizeof(long), |
34f5a398 | 409 | .mode = 0644, |
6d456111 | 410 | .proc_handler = proc_taint, |
1da177e4 | 411 | }, |
34f5a398 | 412 | #endif |
9745512c AV |
413 | #ifdef CONFIG_LATENCYTOP |
414 | { | |
415 | .procname = "latencytop", | |
416 | .data = &latencytop_enabled, | |
417 | .maxlen = sizeof(int), | |
418 | .mode = 0644, | |
6d456111 | 419 | .proc_handler = proc_dointvec, |
9745512c AV |
420 | }, |
421 | #endif | |
1da177e4 LT |
422 | #ifdef CONFIG_BLK_DEV_INITRD |
423 | { | |
1da177e4 LT |
424 | .procname = "real-root-dev", |
425 | .data = &real_root_dev, | |
426 | .maxlen = sizeof(int), | |
427 | .mode = 0644, | |
6d456111 | 428 | .proc_handler = proc_dointvec, |
1da177e4 LT |
429 | }, |
430 | #endif | |
45807a1d | 431 | { |
45807a1d IM |
432 | .procname = "print-fatal-signals", |
433 | .data = &print_fatal_signals, | |
434 | .maxlen = sizeof(int), | |
435 | .mode = 0644, | |
6d456111 | 436 | .proc_handler = proc_dointvec, |
45807a1d | 437 | }, |
72c57ed5 | 438 | #ifdef CONFIG_SPARC |
1da177e4 | 439 | { |
1da177e4 LT |
440 | .procname = "reboot-cmd", |
441 | .data = reboot_command, | |
442 | .maxlen = 256, | |
443 | .mode = 0644, | |
6d456111 | 444 | .proc_handler = proc_dostring, |
1da177e4 LT |
445 | }, |
446 | { | |
1da177e4 LT |
447 | .procname = "stop-a", |
448 | .data = &stop_a_enabled, | |
449 | .maxlen = sizeof (int), | |
450 | .mode = 0644, | |
6d456111 | 451 | .proc_handler = proc_dointvec, |
1da177e4 LT |
452 | }, |
453 | { | |
1da177e4 LT |
454 | .procname = "scons-poweroff", |
455 | .data = &scons_pwroff, | |
456 | .maxlen = sizeof (int), | |
457 | .mode = 0644, | |
6d456111 | 458 | .proc_handler = proc_dointvec, |
1da177e4 LT |
459 | }, |
460 | #endif | |
0871420f DM |
461 | #ifdef CONFIG_SPARC64 |
462 | { | |
0871420f DM |
463 | .procname = "tsb-ratio", |
464 | .data = &sysctl_tsb_ratio, | |
465 | .maxlen = sizeof (int), | |
466 | .mode = 0644, | |
6d456111 | 467 | .proc_handler = proc_dointvec, |
0871420f DM |
468 | }, |
469 | #endif | |
1da177e4 LT |
470 | #ifdef __hppa__ |
471 | { | |
1da177e4 LT |
472 | .procname = "soft-power", |
473 | .data = &pwrsw_enabled, | |
474 | .maxlen = sizeof (int), | |
475 | .mode = 0644, | |
6d456111 | 476 | .proc_handler = proc_dointvec, |
1da177e4 LT |
477 | }, |
478 | { | |
1da177e4 LT |
479 | .procname = "unaligned-trap", |
480 | .data = &unaligned_enabled, | |
481 | .maxlen = sizeof (int), | |
482 | .mode = 0644, | |
6d456111 | 483 | .proc_handler = proc_dointvec, |
1da177e4 LT |
484 | }, |
485 | #endif | |
486 | { | |
1da177e4 LT |
487 | .procname = "ctrl-alt-del", |
488 | .data = &C_A_D, | |
489 | .maxlen = sizeof(int), | |
490 | .mode = 0644, | |
6d456111 | 491 | .proc_handler = proc_dointvec, |
1da177e4 | 492 | }, |
606576ce | 493 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 494 | { |
b0fc494f SR |
495 | .procname = "ftrace_enabled", |
496 | .data = &ftrace_enabled, | |
497 | .maxlen = sizeof(int), | |
498 | .mode = 0644, | |
6d456111 | 499 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
500 | }, |
501 | #endif | |
f38f1d2a SR |
502 | #ifdef CONFIG_STACK_TRACER |
503 | { | |
f38f1d2a SR |
504 | .procname = "stack_tracer_enabled", |
505 | .data = &stack_tracer_enabled, | |
506 | .maxlen = sizeof(int), | |
507 | .mode = 0644, | |
6d456111 | 508 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
509 | }, |
510 | #endif | |
944ac425 SR |
511 | #ifdef CONFIG_TRACING |
512 | { | |
3299b4dd | 513 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
514 | .data = &ftrace_dump_on_oops, |
515 | .maxlen = sizeof(int), | |
516 | .mode = 0644, | |
6d456111 | 517 | .proc_handler = proc_dointvec, |
944ac425 SR |
518 | }, |
519 | #endif | |
a1ef5adb | 520 | #ifdef CONFIG_MODULES |
1da177e4 | 521 | { |
1da177e4 LT |
522 | .procname = "modprobe", |
523 | .data = &modprobe_path, | |
524 | .maxlen = KMOD_PATH_LEN, | |
525 | .mode = 0644, | |
6d456111 | 526 | .proc_handler = proc_dostring, |
1da177e4 | 527 | }, |
3d43321b | 528 | { |
3d43321b KC |
529 | .procname = "modules_disabled", |
530 | .data = &modules_disabled, | |
531 | .maxlen = sizeof(int), | |
532 | .mode = 0644, | |
533 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 534 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
535 | .extra1 = &one, |
536 | .extra2 = &one, | |
537 | }, | |
1da177e4 | 538 | #endif |
57ae2508 | 539 | #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET) |
1da177e4 | 540 | { |
1da177e4 | 541 | .procname = "hotplug", |
312c004d KS |
542 | .data = &uevent_helper, |
543 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 544 | .mode = 0644, |
6d456111 | 545 | .proc_handler = proc_dostring, |
1da177e4 LT |
546 | }, |
547 | #endif | |
548 | #ifdef CONFIG_CHR_DEV_SG | |
549 | { | |
1da177e4 LT |
550 | .procname = "sg-big-buff", |
551 | .data = &sg_big_buff, | |
552 | .maxlen = sizeof (int), | |
553 | .mode = 0444, | |
6d456111 | 554 | .proc_handler = proc_dointvec, |
1da177e4 LT |
555 | }, |
556 | #endif | |
557 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
558 | { | |
1da177e4 LT |
559 | .procname = "acct", |
560 | .data = &acct_parm, | |
561 | .maxlen = 3*sizeof(int), | |
562 | .mode = 0644, | |
6d456111 | 563 | .proc_handler = proc_dointvec, |
1da177e4 LT |
564 | }, |
565 | #endif | |
1da177e4 LT |
566 | #ifdef CONFIG_MAGIC_SYSRQ |
567 | { | |
1da177e4 | 568 | .procname = "sysrq", |
5d6f647f | 569 | .data = &__sysrq_enabled, |
1da177e4 LT |
570 | .maxlen = sizeof (int), |
571 | .mode = 0644, | |
6d456111 | 572 | .proc_handler = proc_dointvec, |
1da177e4 LT |
573 | }, |
574 | #endif | |
d6f8ff73 | 575 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 576 | { |
1da177e4 | 577 | .procname = "cad_pid", |
9ec52099 | 578 | .data = NULL, |
1da177e4 LT |
579 | .maxlen = sizeof (int), |
580 | .mode = 0600, | |
6d456111 | 581 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 582 | }, |
d6f8ff73 | 583 | #endif |
1da177e4 | 584 | { |
1da177e4 LT |
585 | .procname = "threads-max", |
586 | .data = &max_threads, | |
587 | .maxlen = sizeof(int), | |
588 | .mode = 0644, | |
6d456111 | 589 | .proc_handler = proc_dointvec, |
1da177e4 LT |
590 | }, |
591 | { | |
1da177e4 LT |
592 | .procname = "random", |
593 | .mode = 0555, | |
594 | .child = random_table, | |
595 | }, | |
1da177e4 | 596 | { |
1da177e4 LT |
597 | .procname = "overflowuid", |
598 | .data = &overflowuid, | |
599 | .maxlen = sizeof(int), | |
600 | .mode = 0644, | |
6d456111 | 601 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
602 | .extra1 = &minolduid, |
603 | .extra2 = &maxolduid, | |
604 | }, | |
605 | { | |
1da177e4 LT |
606 | .procname = "overflowgid", |
607 | .data = &overflowgid, | |
608 | .maxlen = sizeof(int), | |
609 | .mode = 0644, | |
6d456111 | 610 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
611 | .extra1 = &minolduid, |
612 | .extra2 = &maxolduid, | |
613 | }, | |
347a8dc3 | 614 | #ifdef CONFIG_S390 |
1da177e4 LT |
615 | #ifdef CONFIG_MATHEMU |
616 | { | |
1da177e4 LT |
617 | .procname = "ieee_emulation_warnings", |
618 | .data = &sysctl_ieee_emulation_warnings, | |
619 | .maxlen = sizeof(int), | |
620 | .mode = 0644, | |
6d456111 | 621 | .proc_handler = proc_dointvec, |
1da177e4 | 622 | }, |
1da177e4 LT |
623 | #endif |
624 | { | |
1da177e4 LT |
625 | .procname = "userprocess_debug", |
626 | .data = &sysctl_userprocess_debug, | |
627 | .maxlen = sizeof(int), | |
628 | .mode = 0644, | |
6d456111 | 629 | .proc_handler = proc_dointvec, |
1da177e4 LT |
630 | }, |
631 | #endif | |
632 | { | |
1da177e4 LT |
633 | .procname = "pid_max", |
634 | .data = &pid_max, | |
635 | .maxlen = sizeof (int), | |
636 | .mode = 0644, | |
6d456111 | 637 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
638 | .extra1 = &pid_max_min, |
639 | .extra2 = &pid_max_max, | |
640 | }, | |
641 | { | |
1da177e4 LT |
642 | .procname = "panic_on_oops", |
643 | .data = &panic_on_oops, | |
644 | .maxlen = sizeof(int), | |
645 | .mode = 0644, | |
6d456111 | 646 | .proc_handler = proc_dointvec, |
1da177e4 | 647 | }, |
7ef3d2fd JP |
648 | #if defined CONFIG_PRINTK |
649 | { | |
7ef3d2fd JP |
650 | .procname = "printk", |
651 | .data = &console_loglevel, | |
652 | .maxlen = 4*sizeof(int), | |
653 | .mode = 0644, | |
6d456111 | 654 | .proc_handler = proc_dointvec, |
7ef3d2fd | 655 | }, |
1da177e4 | 656 | { |
1da177e4 | 657 | .procname = "printk_ratelimit", |
717115e1 | 658 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
659 | .maxlen = sizeof(int), |
660 | .mode = 0644, | |
6d456111 | 661 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
662 | }, |
663 | { | |
1da177e4 | 664 | .procname = "printk_ratelimit_burst", |
717115e1 | 665 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
666 | .maxlen = sizeof(int), |
667 | .mode = 0644, | |
6d456111 | 668 | .proc_handler = proc_dointvec, |
1da177e4 | 669 | }, |
af91322e | 670 | { |
af91322e DY |
671 | .procname = "printk_delay", |
672 | .data = &printk_delay_msec, | |
673 | .maxlen = sizeof(int), | |
674 | .mode = 0644, | |
6d456111 | 675 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
676 | .extra1 = &zero, |
677 | .extra2 = &ten_thousand, | |
678 | }, | |
7ef3d2fd | 679 | #endif |
1da177e4 | 680 | { |
1da177e4 LT |
681 | .procname = "ngroups_max", |
682 | .data = &ngroups_max, | |
683 | .maxlen = sizeof (int), | |
684 | .mode = 0444, | |
6d456111 | 685 | .proc_handler = proc_dointvec, |
1da177e4 LT |
686 | }, |
687 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
688 | { | |
1da177e4 LT |
689 | .procname = "unknown_nmi_panic", |
690 | .data = &unknown_nmi_panic, | |
691 | .maxlen = sizeof (int), | |
692 | .mode = 0644, | |
6d456111 | 693 | .proc_handler = proc_dointvec, |
1da177e4 | 694 | }, |
407984f1 | 695 | { |
407984f1 DZ |
696 | .procname = "nmi_watchdog", |
697 | .data = &nmi_watchdog_enabled, | |
698 | .maxlen = sizeof (int), | |
699 | .mode = 0644, | |
6d456111 | 700 | .proc_handler = proc_nmi_enabled, |
1da177e4 LT |
701 | }, |
702 | #endif | |
703 | #if defined(CONFIG_X86) | |
8da5adda | 704 | { |
8da5adda DZ |
705 | .procname = "panic_on_unrecovered_nmi", |
706 | .data = &panic_on_unrecovered_nmi, | |
707 | .maxlen = sizeof(int), | |
708 | .mode = 0644, | |
6d456111 | 709 | .proc_handler = proc_dointvec, |
8da5adda | 710 | }, |
5211a242 | 711 | { |
5211a242 KG |
712 | .procname = "panic_on_io_nmi", |
713 | .data = &panic_on_io_nmi, | |
714 | .maxlen = sizeof(int), | |
715 | .mode = 0644, | |
6d456111 | 716 | .proc_handler = proc_dointvec, |
5211a242 | 717 | }, |
1da177e4 | 718 | { |
1da177e4 LT |
719 | .procname = "bootloader_type", |
720 | .data = &bootloader_type, | |
721 | .maxlen = sizeof (int), | |
722 | .mode = 0444, | |
6d456111 | 723 | .proc_handler = proc_dointvec, |
1da177e4 | 724 | }, |
5031296c | 725 | { |
5031296c PA |
726 | .procname = "bootloader_version", |
727 | .data = &bootloader_version, | |
728 | .maxlen = sizeof (int), | |
729 | .mode = 0444, | |
6d456111 | 730 | .proc_handler = proc_dointvec, |
5031296c | 731 | }, |
0741f4d2 | 732 | { |
0741f4d2 CE |
733 | .procname = "kstack_depth_to_print", |
734 | .data = &kstack_depth_to_print, | |
735 | .maxlen = sizeof(int), | |
736 | .mode = 0644, | |
6d456111 | 737 | .proc_handler = proc_dointvec, |
0741f4d2 | 738 | }, |
6e7c4025 | 739 | { |
6e7c4025 IM |
740 | .procname = "io_delay_type", |
741 | .data = &io_delay_type, | |
742 | .maxlen = sizeof(int), | |
743 | .mode = 0644, | |
6d456111 | 744 | .proc_handler = proc_dointvec, |
6e7c4025 | 745 | }, |
1da177e4 | 746 | #endif |
7a9166e3 | 747 | #if defined(CONFIG_MMU) |
1da177e4 | 748 | { |
1da177e4 LT |
749 | .procname = "randomize_va_space", |
750 | .data = &randomize_va_space, | |
751 | .maxlen = sizeof(int), | |
752 | .mode = 0644, | |
6d456111 | 753 | .proc_handler = proc_dointvec, |
1da177e4 | 754 | }, |
7a9166e3 | 755 | #endif |
0152fb37 | 756 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 757 | { |
951f22d5 MS |
758 | .procname = "spin_retry", |
759 | .data = &spin_retry, | |
760 | .maxlen = sizeof (int), | |
761 | .mode = 0644, | |
6d456111 | 762 | .proc_handler = proc_dointvec, |
951f22d5 | 763 | }, |
c255d844 | 764 | #endif |
673d5b43 | 765 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 766 | { |
c255d844 | 767 | .procname = "acpi_video_flags", |
77afcf78 | 768 | .data = &acpi_realmode_flags, |
c255d844 PM |
769 | .maxlen = sizeof (unsigned long), |
770 | .mode = 0644, | |
6d456111 | 771 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 772 | }, |
d2b176ed JS |
773 | #endif |
774 | #ifdef CONFIG_IA64 | |
775 | { | |
d2b176ed JS |
776 | .procname = "ignore-unaligned-usertrap", |
777 | .data = &no_unaligned_warning, | |
778 | .maxlen = sizeof (int), | |
779 | .mode = 0644, | |
6d456111 | 780 | .proc_handler = proc_dointvec, |
d2b176ed | 781 | }, |
88fc241f | 782 | { |
88fc241f DC |
783 | .procname = "unaligned-dump-stack", |
784 | .data = &unaligned_dump_stack, | |
785 | .maxlen = sizeof (int), | |
786 | .mode = 0644, | |
6d456111 | 787 | .proc_handler = proc_dointvec, |
88fc241f | 788 | }, |
bebfa101 | 789 | #endif |
c4f3b63f | 790 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
9c44bc03 | 791 | { |
9c44bc03 IM |
792 | .procname = "softlockup_panic", |
793 | .data = &softlockup_panic, | |
794 | .maxlen = sizeof(int), | |
795 | .mode = 0644, | |
6d456111 | 796 | .proc_handler = proc_dointvec_minmax, |
9c44bc03 IM |
797 | .extra1 = &zero, |
798 | .extra2 = &one, | |
799 | }, | |
c4f3b63f | 800 | { |
c4f3b63f RT |
801 | .procname = "softlockup_thresh", |
802 | .data = &softlockup_thresh, | |
9383d967 | 803 | .maxlen = sizeof(int), |
c4f3b63f | 804 | .mode = 0644, |
6d456111 | 805 | .proc_handler = proc_dosoftlockup_thresh, |
9383d967 | 806 | .extra1 = &neg_one, |
c4f3b63f RT |
807 | .extra2 = &sixty, |
808 | }, | |
e162b39a MSB |
809 | #endif |
810 | #ifdef CONFIG_DETECT_HUNG_TASK | |
811 | { | |
e162b39a MSB |
812 | .procname = "hung_task_panic", |
813 | .data = &sysctl_hung_task_panic, | |
814 | .maxlen = sizeof(int), | |
815 | .mode = 0644, | |
6d456111 | 816 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
817 | .extra1 = &zero, |
818 | .extra2 = &one, | |
819 | }, | |
82a1fcb9 | 820 | { |
82a1fcb9 IM |
821 | .procname = "hung_task_check_count", |
822 | .data = &sysctl_hung_task_check_count, | |
90739081 | 823 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 824 | .mode = 0644, |
6d456111 | 825 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 IM |
826 | }, |
827 | { | |
82a1fcb9 IM |
828 | .procname = "hung_task_timeout_secs", |
829 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 830 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 831 | .mode = 0644, |
6d456111 | 832 | .proc_handler = proc_dohung_task_timeout_secs, |
82a1fcb9 IM |
833 | }, |
834 | { | |
82a1fcb9 IM |
835 | .procname = "hung_task_warnings", |
836 | .data = &sysctl_hung_task_warnings, | |
90739081 | 837 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 838 | .mode = 0644, |
6d456111 | 839 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 | 840 | }, |
c4f3b63f | 841 | #endif |
bebfa101 AK |
842 | #ifdef CONFIG_COMPAT |
843 | { | |
bebfa101 AK |
844 | .procname = "compat-log", |
845 | .data = &compat_log, | |
846 | .maxlen = sizeof (int), | |
847 | .mode = 0644, | |
6d456111 | 848 | .proc_handler = proc_dointvec, |
bebfa101 | 849 | }, |
951f22d5 | 850 | #endif |
23f78d4a IM |
851 | #ifdef CONFIG_RT_MUTEXES |
852 | { | |
23f78d4a IM |
853 | .procname = "max_lock_depth", |
854 | .data = &max_lock_depth, | |
855 | .maxlen = sizeof(int), | |
856 | .mode = 0644, | |
6d456111 | 857 | .proc_handler = proc_dointvec, |
23f78d4a | 858 | }, |
5096add8 | 859 | #endif |
10a0a8d4 | 860 | { |
10a0a8d4 JF |
861 | .procname = "poweroff_cmd", |
862 | .data = &poweroff_cmd, | |
863 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
864 | .mode = 0644, | |
6d456111 | 865 | .proc_handler = proc_dostring, |
10a0a8d4 | 866 | }, |
0b77f5bf DH |
867 | #ifdef CONFIG_KEYS |
868 | { | |
0b77f5bf DH |
869 | .procname = "keys", |
870 | .mode = 0555, | |
871 | .child = key_sysctls, | |
872 | }, | |
873 | #endif | |
31a72bce PM |
874 | #ifdef CONFIG_RCU_TORTURE_TEST |
875 | { | |
31a72bce PM |
876 | .procname = "rcutorture_runnable", |
877 | .data = &rcutorture_runnable, | |
878 | .maxlen = sizeof(int), | |
879 | .mode = 0644, | |
6d456111 | 880 | .proc_handler = proc_dointvec, |
31a72bce PM |
881 | }, |
882 | #endif | |
12e22c5e DH |
883 | #ifdef CONFIG_SLOW_WORK |
884 | { | |
12e22c5e DH |
885 | .procname = "slow-work", |
886 | .mode = 0555, | |
887 | .child = slow_work_sysctls, | |
888 | }, | |
889 | #endif | |
cdd6c482 | 890 | #ifdef CONFIG_PERF_EVENTS |
1ccd1549 | 891 | { |
cdd6c482 IM |
892 | .procname = "perf_event_paranoid", |
893 | .data = &sysctl_perf_event_paranoid, | |
894 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 895 | .mode = 0644, |
6d456111 | 896 | .proc_handler = proc_dointvec, |
1ccd1549 | 897 | }, |
c5078f78 | 898 | { |
cdd6c482 IM |
899 | .procname = "perf_event_mlock_kb", |
900 | .data = &sysctl_perf_event_mlock, | |
901 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 902 | .mode = 0644, |
6d456111 | 903 | .proc_handler = proc_dointvec, |
c5078f78 | 904 | }, |
a78ac325 | 905 | { |
cdd6c482 IM |
906 | .procname = "perf_event_max_sample_rate", |
907 | .data = &sysctl_perf_event_sample_rate, | |
908 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 909 | .mode = 0644, |
6d456111 | 910 | .proc_handler = proc_dointvec, |
a78ac325 | 911 | }, |
1ccd1549 | 912 | #endif |
dfec072e VN |
913 | #ifdef CONFIG_KMEMCHECK |
914 | { | |
dfec072e VN |
915 | .procname = "kmemcheck", |
916 | .data = &kmemcheck_enabled, | |
917 | .maxlen = sizeof(int), | |
918 | .mode = 0644, | |
6d456111 | 919 | .proc_handler = proc_dointvec, |
dfec072e VN |
920 | }, |
921 | #endif | |
cb684b5b | 922 | #ifdef CONFIG_BLOCK |
5e605b64 | 923 | { |
5e605b64 JA |
924 | .procname = "blk_iopoll", |
925 | .data = &blk_iopoll_enabled, | |
926 | .maxlen = sizeof(int), | |
927 | .mode = 0644, | |
6d456111 | 928 | .proc_handler = proc_dointvec, |
5e605b64 | 929 | }, |
cb684b5b | 930 | #endif |
ed2c12f3 AM |
931 | /* |
932 | * NOTE: do not add new entries to this table unless you have read | |
933 | * Documentation/sysctl/ctl_unnumbered.txt | |
934 | */ | |
6fce56ec | 935 | { } |
1da177e4 LT |
936 | }; |
937 | ||
d8217f07 | 938 | static struct ctl_table vm_table[] = { |
1da177e4 | 939 | { |
1da177e4 LT |
940 | .procname = "overcommit_memory", |
941 | .data = &sysctl_overcommit_memory, | |
942 | .maxlen = sizeof(sysctl_overcommit_memory), | |
943 | .mode = 0644, | |
6d456111 | 944 | .proc_handler = proc_dointvec, |
1da177e4 | 945 | }, |
fadd8fbd | 946 | { |
fadd8fbd KH |
947 | .procname = "panic_on_oom", |
948 | .data = &sysctl_panic_on_oom, | |
949 | .maxlen = sizeof(sysctl_panic_on_oom), | |
950 | .mode = 0644, | |
6d456111 | 951 | .proc_handler = proc_dointvec, |
fadd8fbd | 952 | }, |
fe071d7e | 953 | { |
fe071d7e DR |
954 | .procname = "oom_kill_allocating_task", |
955 | .data = &sysctl_oom_kill_allocating_task, | |
956 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
957 | .mode = 0644, | |
6d456111 | 958 | .proc_handler = proc_dointvec, |
fe071d7e | 959 | }, |
fef1bdd6 | 960 | { |
fef1bdd6 DR |
961 | .procname = "oom_dump_tasks", |
962 | .data = &sysctl_oom_dump_tasks, | |
963 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
964 | .mode = 0644, | |
6d456111 | 965 | .proc_handler = proc_dointvec, |
fef1bdd6 | 966 | }, |
1da177e4 | 967 | { |
1da177e4 LT |
968 | .procname = "overcommit_ratio", |
969 | .data = &sysctl_overcommit_ratio, | |
970 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
971 | .mode = 0644, | |
6d456111 | 972 | .proc_handler = proc_dointvec, |
1da177e4 LT |
973 | }, |
974 | { | |
1da177e4 LT |
975 | .procname = "page-cluster", |
976 | .data = &page_cluster, | |
977 | .maxlen = sizeof(int), | |
978 | .mode = 0644, | |
6d456111 | 979 | .proc_handler = proc_dointvec, |
1da177e4 LT |
980 | }, |
981 | { | |
1da177e4 LT |
982 | .procname = "dirty_background_ratio", |
983 | .data = &dirty_background_ratio, | |
984 | .maxlen = sizeof(dirty_background_ratio), | |
985 | .mode = 0644, | |
6d456111 | 986 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
987 | .extra1 = &zero, |
988 | .extra2 = &one_hundred, | |
989 | }, | |
2da02997 | 990 | { |
2da02997 DR |
991 | .procname = "dirty_background_bytes", |
992 | .data = &dirty_background_bytes, | |
993 | .maxlen = sizeof(dirty_background_bytes), | |
994 | .mode = 0644, | |
6d456111 | 995 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 996 | .extra1 = &one_ul, |
2da02997 | 997 | }, |
1da177e4 | 998 | { |
1da177e4 LT |
999 | .procname = "dirty_ratio", |
1000 | .data = &vm_dirty_ratio, | |
1001 | .maxlen = sizeof(vm_dirty_ratio), | |
1002 | .mode = 0644, | |
6d456111 | 1003 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1004 | .extra1 = &zero, |
1005 | .extra2 = &one_hundred, | |
1006 | }, | |
2da02997 | 1007 | { |
2da02997 DR |
1008 | .procname = "dirty_bytes", |
1009 | .data = &vm_dirty_bytes, | |
1010 | .maxlen = sizeof(vm_dirty_bytes), | |
1011 | .mode = 0644, | |
6d456111 | 1012 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1013 | .extra1 = &dirty_bytes_min, |
2da02997 | 1014 | }, |
1da177e4 | 1015 | { |
1da177e4 | 1016 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1017 | .data = &dirty_writeback_interval, |
1018 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1019 | .mode = 0644, |
6d456111 | 1020 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1021 | }, |
1022 | { | |
1da177e4 | 1023 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1024 | .data = &dirty_expire_interval, |
1025 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1026 | .mode = 0644, |
6d456111 | 1027 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1028 | }, |
1029 | { | |
1da177e4 LT |
1030 | .procname = "nr_pdflush_threads", |
1031 | .data = &nr_pdflush_threads, | |
1032 | .maxlen = sizeof nr_pdflush_threads, | |
1033 | .mode = 0444 /* read-only*/, | |
6d456111 | 1034 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1035 | }, |
1036 | { | |
1da177e4 LT |
1037 | .procname = "swappiness", |
1038 | .data = &vm_swappiness, | |
1039 | .maxlen = sizeof(vm_swappiness), | |
1040 | .mode = 0644, | |
6d456111 | 1041 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1042 | .extra1 = &zero, |
1043 | .extra2 = &one_hundred, | |
1044 | }, | |
1045 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1046 | { |
1da177e4 | 1047 | .procname = "nr_hugepages", |
e5ff2159 | 1048 | .data = NULL, |
1da177e4 LT |
1049 | .maxlen = sizeof(unsigned long), |
1050 | .mode = 0644, | |
6d456111 | 1051 | .proc_handler = hugetlb_sysctl_handler, |
1da177e4 LT |
1052 | .extra1 = (void *)&hugetlb_zero, |
1053 | .extra2 = (void *)&hugetlb_infinity, | |
06808b08 LS |
1054 | }, |
1055 | #ifdef CONFIG_NUMA | |
1056 | { | |
1057 | .procname = "nr_hugepages_mempolicy", | |
1058 | .data = NULL, | |
1059 | .maxlen = sizeof(unsigned long), | |
1060 | .mode = 0644, | |
1061 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
1062 | .extra1 = (void *)&hugetlb_zero, | |
1063 | .extra2 = (void *)&hugetlb_infinity, | |
1064 | }, | |
1065 | #endif | |
1da177e4 | 1066 | { |
1da177e4 LT |
1067 | .procname = "hugetlb_shm_group", |
1068 | .data = &sysctl_hugetlb_shm_group, | |
1069 | .maxlen = sizeof(gid_t), | |
1070 | .mode = 0644, | |
6d456111 | 1071 | .proc_handler = proc_dointvec, |
1da177e4 | 1072 | }, |
396faf03 | 1073 | { |
396faf03 MG |
1074 | .procname = "hugepages_treat_as_movable", |
1075 | .data = &hugepages_treat_as_movable, | |
1076 | .maxlen = sizeof(int), | |
1077 | .mode = 0644, | |
6d456111 | 1078 | .proc_handler = hugetlb_treat_movable_handler, |
396faf03 | 1079 | }, |
d1c3fb1f | 1080 | { |
d1c3fb1f | 1081 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1082 | .data = NULL, |
1083 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1084 | .mode = 0644, |
6d456111 | 1085 | .proc_handler = hugetlb_overcommit_handler, |
e5ff2159 AK |
1086 | .extra1 = (void *)&hugetlb_zero, |
1087 | .extra2 = (void *)&hugetlb_infinity, | |
d1c3fb1f | 1088 | }, |
1da177e4 LT |
1089 | #endif |
1090 | { | |
1da177e4 LT |
1091 | .procname = "lowmem_reserve_ratio", |
1092 | .data = &sysctl_lowmem_reserve_ratio, | |
1093 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1094 | .mode = 0644, | |
6d456111 | 1095 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1096 | }, |
9d0243bc | 1097 | { |
9d0243bc AM |
1098 | .procname = "drop_caches", |
1099 | .data = &sysctl_drop_caches, | |
1100 | .maxlen = sizeof(int), | |
1101 | .mode = 0644, | |
1102 | .proc_handler = drop_caches_sysctl_handler, | |
9d0243bc | 1103 | }, |
1da177e4 | 1104 | { |
1da177e4 LT |
1105 | .procname = "min_free_kbytes", |
1106 | .data = &min_free_kbytes, | |
1107 | .maxlen = sizeof(min_free_kbytes), | |
1108 | .mode = 0644, | |
6d456111 | 1109 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1110 | .extra1 = &zero, |
1111 | }, | |
8ad4b1fb | 1112 | { |
8ad4b1fb RS |
1113 | .procname = "percpu_pagelist_fraction", |
1114 | .data = &percpu_pagelist_fraction, | |
1115 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1116 | .mode = 0644, | |
6d456111 | 1117 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
8ad4b1fb RS |
1118 | .extra1 = &min_percpu_pagelist_fract, |
1119 | }, | |
1da177e4 LT |
1120 | #ifdef CONFIG_MMU |
1121 | { | |
1da177e4 LT |
1122 | .procname = "max_map_count", |
1123 | .data = &sysctl_max_map_count, | |
1124 | .maxlen = sizeof(sysctl_max_map_count), | |
1125 | .mode = 0644, | |
3e26120c | 1126 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1127 | .extra1 = &zero, |
1da177e4 | 1128 | }, |
dd8632a1 PM |
1129 | #else |
1130 | { | |
dd8632a1 PM |
1131 | .procname = "nr_trim_pages", |
1132 | .data = &sysctl_nr_trim_pages, | |
1133 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1134 | .mode = 0644, | |
6d456111 | 1135 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1136 | .extra1 = &zero, |
1137 | }, | |
1da177e4 LT |
1138 | #endif |
1139 | { | |
1da177e4 LT |
1140 | .procname = "laptop_mode", |
1141 | .data = &laptop_mode, | |
1142 | .maxlen = sizeof(laptop_mode), | |
1143 | .mode = 0644, | |
6d456111 | 1144 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1145 | }, |
1146 | { | |
1da177e4 LT |
1147 | .procname = "block_dump", |
1148 | .data = &block_dump, | |
1149 | .maxlen = sizeof(block_dump), | |
1150 | .mode = 0644, | |
6d456111 | 1151 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1152 | .extra1 = &zero, |
1153 | }, | |
1154 | { | |
1da177e4 LT |
1155 | .procname = "vfs_cache_pressure", |
1156 | .data = &sysctl_vfs_cache_pressure, | |
1157 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1158 | .mode = 0644, | |
6d456111 | 1159 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1160 | .extra1 = &zero, |
1161 | }, | |
1162 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1163 | { | |
1da177e4 LT |
1164 | .procname = "legacy_va_layout", |
1165 | .data = &sysctl_legacy_va_layout, | |
1166 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1167 | .mode = 0644, | |
6d456111 | 1168 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1169 | .extra1 = &zero, |
1170 | }, | |
1171 | #endif | |
1743660b CL |
1172 | #ifdef CONFIG_NUMA |
1173 | { | |
1743660b CL |
1174 | .procname = "zone_reclaim_mode", |
1175 | .data = &zone_reclaim_mode, | |
1176 | .maxlen = sizeof(zone_reclaim_mode), | |
1177 | .mode = 0644, | |
6d456111 | 1178 | .proc_handler = proc_dointvec, |
c84db23c | 1179 | .extra1 = &zero, |
1743660b | 1180 | }, |
9614634f | 1181 | { |
9614634f CL |
1182 | .procname = "min_unmapped_ratio", |
1183 | .data = &sysctl_min_unmapped_ratio, | |
1184 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1185 | .mode = 0644, | |
6d456111 | 1186 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1187 | .extra1 = &zero, |
1188 | .extra2 = &one_hundred, | |
1189 | }, | |
0ff38490 | 1190 | { |
0ff38490 CL |
1191 | .procname = "min_slab_ratio", |
1192 | .data = &sysctl_min_slab_ratio, | |
1193 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1194 | .mode = 0644, | |
6d456111 | 1195 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1196 | .extra1 = &zero, |
1197 | .extra2 = &one_hundred, | |
1198 | }, | |
e6e5494c | 1199 | #endif |
77461ab3 CL |
1200 | #ifdef CONFIG_SMP |
1201 | { | |
77461ab3 CL |
1202 | .procname = "stat_interval", |
1203 | .data = &sysctl_stat_interval, | |
1204 | .maxlen = sizeof(sysctl_stat_interval), | |
1205 | .mode = 0644, | |
6d456111 | 1206 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1207 | }, |
1208 | #endif | |
6e141546 | 1209 | #ifdef CONFIG_MMU |
ed032189 | 1210 | { |
ed032189 | 1211 | .procname = "mmap_min_addr", |
788084ab EP |
1212 | .data = &dac_mmap_min_addr, |
1213 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1214 | .mode = 0644, |
6d456111 | 1215 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1216 | }, |
6e141546 | 1217 | #endif |
f0c0b2b8 KH |
1218 | #ifdef CONFIG_NUMA |
1219 | { | |
f0c0b2b8 KH |
1220 | .procname = "numa_zonelist_order", |
1221 | .data = &numa_zonelist_order, | |
1222 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1223 | .mode = 0644, | |
6d456111 | 1224 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1225 | }, |
1226 | #endif | |
2b8232ce | 1227 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1228 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1229 | { |
e6e5494c IM |
1230 | .procname = "vdso_enabled", |
1231 | .data = &vdso_enabled, | |
1232 | .maxlen = sizeof(vdso_enabled), | |
1233 | .mode = 0644, | |
6d456111 | 1234 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1235 | .extra1 = &zero, |
1236 | }, | |
1da177e4 | 1237 | #endif |
195cf453 BG |
1238 | #ifdef CONFIG_HIGHMEM |
1239 | { | |
195cf453 BG |
1240 | .procname = "highmem_is_dirtyable", |
1241 | .data = &vm_highmem_is_dirtyable, | |
1242 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1243 | .mode = 0644, | |
6d456111 | 1244 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1245 | .extra1 = &zero, |
1246 | .extra2 = &one, | |
1247 | }, | |
1248 | #endif | |
4be6f6bb | 1249 | { |
4be6f6bb PZ |
1250 | .procname = "scan_unevictable_pages", |
1251 | .data = &scan_unevictable_pages, | |
1252 | .maxlen = sizeof(scan_unevictable_pages), | |
1253 | .mode = 0644, | |
6d456111 | 1254 | .proc_handler = scan_unevictable_handler, |
4be6f6bb | 1255 | }, |
6a46079c AK |
1256 | #ifdef CONFIG_MEMORY_FAILURE |
1257 | { | |
6a46079c AK |
1258 | .procname = "memory_failure_early_kill", |
1259 | .data = &sysctl_memory_failure_early_kill, | |
1260 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1261 | .mode = 0644, | |
6d456111 | 1262 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1263 | .extra1 = &zero, |
1264 | .extra2 = &one, | |
1265 | }, | |
1266 | { | |
6a46079c AK |
1267 | .procname = "memory_failure_recovery", |
1268 | .data = &sysctl_memory_failure_recovery, | |
1269 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1270 | .mode = 0644, | |
6d456111 | 1271 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1272 | .extra1 = &zero, |
1273 | .extra2 = &one, | |
1274 | }, | |
1275 | #endif | |
1276 | ||
2be7fe07 AM |
1277 | /* |
1278 | * NOTE: do not add new entries to this table unless you have read | |
1279 | * Documentation/sysctl/ctl_unnumbered.txt | |
1280 | */ | |
6fce56ec | 1281 | { } |
1da177e4 LT |
1282 | }; |
1283 | ||
2abc26fc | 1284 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1285 | static struct ctl_table binfmt_misc_table[] = { |
6fce56ec | 1286 | { } |
2abc26fc EB |
1287 | }; |
1288 | #endif | |
1289 | ||
d8217f07 | 1290 | static struct ctl_table fs_table[] = { |
1da177e4 | 1291 | { |
1da177e4 LT |
1292 | .procname = "inode-nr", |
1293 | .data = &inodes_stat, | |
1294 | .maxlen = 2*sizeof(int), | |
1295 | .mode = 0444, | |
6d456111 | 1296 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1297 | }, |
1298 | { | |
1da177e4 LT |
1299 | .procname = "inode-state", |
1300 | .data = &inodes_stat, | |
1301 | .maxlen = 7*sizeof(int), | |
1302 | .mode = 0444, | |
6d456111 | 1303 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1304 | }, |
1305 | { | |
1da177e4 LT |
1306 | .procname = "file-nr", |
1307 | .data = &files_stat, | |
1308 | .maxlen = 3*sizeof(int), | |
1309 | .mode = 0444, | |
6d456111 | 1310 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1311 | }, |
1312 | { | |
1da177e4 LT |
1313 | .procname = "file-max", |
1314 | .data = &files_stat.max_files, | |
1315 | .maxlen = sizeof(int), | |
1316 | .mode = 0644, | |
6d456111 | 1317 | .proc_handler = proc_dointvec, |
1da177e4 | 1318 | }, |
9cfe015a | 1319 | { |
9cfe015a ED |
1320 | .procname = "nr_open", |
1321 | .data = &sysctl_nr_open, | |
1322 | .maxlen = sizeof(int), | |
1323 | .mode = 0644, | |
6d456111 | 1324 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1325 | .extra1 = &sysctl_nr_open_min, |
1326 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1327 | }, |
1da177e4 | 1328 | { |
1da177e4 LT |
1329 | .procname = "dentry-state", |
1330 | .data = &dentry_stat, | |
1331 | .maxlen = 6*sizeof(int), | |
1332 | .mode = 0444, | |
6d456111 | 1333 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1334 | }, |
1335 | { | |
1da177e4 LT |
1336 | .procname = "overflowuid", |
1337 | .data = &fs_overflowuid, | |
1338 | .maxlen = sizeof(int), | |
1339 | .mode = 0644, | |
6d456111 | 1340 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1341 | .extra1 = &minolduid, |
1342 | .extra2 = &maxolduid, | |
1343 | }, | |
1344 | { | |
1da177e4 LT |
1345 | .procname = "overflowgid", |
1346 | .data = &fs_overflowgid, | |
1347 | .maxlen = sizeof(int), | |
1348 | .mode = 0644, | |
6d456111 | 1349 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1350 | .extra1 = &minolduid, |
1351 | .extra2 = &maxolduid, | |
1352 | }, | |
bfcd17a6 | 1353 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1354 | { |
1da177e4 LT |
1355 | .procname = "leases-enable", |
1356 | .data = &leases_enable, | |
1357 | .maxlen = sizeof(int), | |
1358 | .mode = 0644, | |
6d456111 | 1359 | .proc_handler = proc_dointvec, |
1da177e4 | 1360 | }, |
bfcd17a6 | 1361 | #endif |
1da177e4 LT |
1362 | #ifdef CONFIG_DNOTIFY |
1363 | { | |
1da177e4 LT |
1364 | .procname = "dir-notify-enable", |
1365 | .data = &dir_notify_enable, | |
1366 | .maxlen = sizeof(int), | |
1367 | .mode = 0644, | |
6d456111 | 1368 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1369 | }, |
1370 | #endif | |
1371 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1372 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1373 | { |
1da177e4 LT |
1374 | .procname = "lease-break-time", |
1375 | .data = &lease_break_time, | |
1376 | .maxlen = sizeof(int), | |
1377 | .mode = 0644, | |
6d456111 | 1378 | .proc_handler = proc_dointvec, |
1da177e4 | 1379 | }, |
bfcd17a6 | 1380 | #endif |
ebf3f09c | 1381 | #ifdef CONFIG_AIO |
1da177e4 | 1382 | { |
1da177e4 LT |
1383 | .procname = "aio-nr", |
1384 | .data = &aio_nr, | |
1385 | .maxlen = sizeof(aio_nr), | |
1386 | .mode = 0444, | |
6d456111 | 1387 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1388 | }, |
1389 | { | |
1da177e4 LT |
1390 | .procname = "aio-max-nr", |
1391 | .data = &aio_max_nr, | |
1392 | .maxlen = sizeof(aio_max_nr), | |
1393 | .mode = 0644, | |
6d456111 | 1394 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1395 | }, |
ebf3f09c | 1396 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1397 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1398 | { |
0399cb08 RL |
1399 | .procname = "inotify", |
1400 | .mode = 0555, | |
1401 | .child = inotify_table, | |
1402 | }, | |
1403 | #endif | |
7ef9964e DL |
1404 | #ifdef CONFIG_EPOLL |
1405 | { | |
1406 | .procname = "epoll", | |
1407 | .mode = 0555, | |
1408 | .child = epoll_table, | |
1409 | }, | |
1410 | #endif | |
1da177e4 | 1411 | #endif |
d6e71144 | 1412 | { |
d6e71144 AC |
1413 | .procname = "suid_dumpable", |
1414 | .data = &suid_dumpable, | |
1415 | .maxlen = sizeof(int), | |
1416 | .mode = 0644, | |
6d456111 | 1417 | .proc_handler = proc_dointvec_minmax, |
8e654fba MW |
1418 | .extra1 = &zero, |
1419 | .extra2 = &two, | |
d6e71144 | 1420 | }, |
2abc26fc EB |
1421 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1422 | { | |
2abc26fc EB |
1423 | .procname = "binfmt_misc", |
1424 | .mode = 0555, | |
1425 | .child = binfmt_misc_table, | |
1426 | }, | |
1427 | #endif | |
2be7fe07 AM |
1428 | /* |
1429 | * NOTE: do not add new entries to this table unless you have read | |
1430 | * Documentation/sysctl/ctl_unnumbered.txt | |
2be7fe07 | 1431 | */ |
6fce56ec | 1432 | { } |
1da177e4 LT |
1433 | }; |
1434 | ||
d8217f07 | 1435 | static struct ctl_table debug_table[] = { |
4b177647 | 1436 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) |
abd4f750 | 1437 | { |
abd4f750 MAS |
1438 | .procname = "exception-trace", |
1439 | .data = &show_unhandled_signals, | |
1440 | .maxlen = sizeof(int), | |
1441 | .mode = 0644, | |
1442 | .proc_handler = proc_dointvec | |
1443 | }, | |
b2be84df MH |
1444 | #endif |
1445 | #if defined(CONFIG_OPTPROBES) | |
1446 | { | |
1447 | .procname = "kprobes-optimization", | |
1448 | .data = &sysctl_kprobes_optimization, | |
1449 | .maxlen = sizeof(int), | |
1450 | .mode = 0644, | |
1451 | .proc_handler = proc_kprobes_optimization_handler, | |
1452 | .extra1 = &zero, | |
1453 | .extra2 = &one, | |
1454 | }, | |
abd4f750 | 1455 | #endif |
6fce56ec | 1456 | { } |
1da177e4 LT |
1457 | }; |
1458 | ||
d8217f07 | 1459 | static struct ctl_table dev_table[] = { |
6fce56ec | 1460 | { } |
0eeca283 | 1461 | }; |
1da177e4 | 1462 | |
330d57fb AV |
1463 | static DEFINE_SPINLOCK(sysctl_lock); |
1464 | ||
1465 | /* called under sysctl_lock */ | |
1466 | static int use_table(struct ctl_table_header *p) | |
1467 | { | |
1468 | if (unlikely(p->unregistering)) | |
1469 | return 0; | |
1470 | p->used++; | |
1471 | return 1; | |
1472 | } | |
1473 | ||
1474 | /* called under sysctl_lock */ | |
1475 | static void unuse_table(struct ctl_table_header *p) | |
1476 | { | |
1477 | if (!--p->used) | |
1478 | if (unlikely(p->unregistering)) | |
1479 | complete(p->unregistering); | |
1480 | } | |
1481 | ||
1482 | /* called under sysctl_lock, will reacquire if has to wait */ | |
1483 | static void start_unregistering(struct ctl_table_header *p) | |
1484 | { | |
1485 | /* | |
1486 | * if p->used is 0, nobody will ever touch that entry again; | |
1487 | * we'll eliminate all paths to it before dropping sysctl_lock | |
1488 | */ | |
1489 | if (unlikely(p->used)) { | |
1490 | struct completion wait; | |
1491 | init_completion(&wait); | |
1492 | p->unregistering = &wait; | |
1493 | spin_unlock(&sysctl_lock); | |
1494 | wait_for_completion(&wait); | |
1495 | spin_lock(&sysctl_lock); | |
f7e6ced4 AV |
1496 | } else { |
1497 | /* anything non-NULL; we'll never dereference it */ | |
1498 | p->unregistering = ERR_PTR(-EINVAL); | |
330d57fb AV |
1499 | } |
1500 | /* | |
1501 | * do not remove from the list until nobody holds it; walking the | |
1502 | * list in do_sysctl() relies on that. | |
1503 | */ | |
1504 | list_del_init(&p->ctl_entry); | |
1505 | } | |
1506 | ||
f7e6ced4 AV |
1507 | void sysctl_head_get(struct ctl_table_header *head) |
1508 | { | |
1509 | spin_lock(&sysctl_lock); | |
1510 | head->count++; | |
1511 | spin_unlock(&sysctl_lock); | |
1512 | } | |
1513 | ||
1514 | void sysctl_head_put(struct ctl_table_header *head) | |
1515 | { | |
1516 | spin_lock(&sysctl_lock); | |
1517 | if (!--head->count) | |
1518 | kfree(head); | |
1519 | spin_unlock(&sysctl_lock); | |
1520 | } | |
1521 | ||
1522 | struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head) | |
1523 | { | |
1524 | if (!head) | |
1525 | BUG(); | |
1526 | spin_lock(&sysctl_lock); | |
1527 | if (!use_table(head)) | |
1528 | head = ERR_PTR(-ENOENT); | |
1529 | spin_unlock(&sysctl_lock); | |
1530 | return head; | |
1531 | } | |
1532 | ||
805b5d5e EB |
1533 | void sysctl_head_finish(struct ctl_table_header *head) |
1534 | { | |
1535 | if (!head) | |
1536 | return; | |
1537 | spin_lock(&sysctl_lock); | |
1538 | unuse_table(head); | |
1539 | spin_unlock(&sysctl_lock); | |
1540 | } | |
1541 | ||
73455092 AV |
1542 | static struct ctl_table_set * |
1543 | lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces) | |
1544 | { | |
1545 | struct ctl_table_set *set = &root->default_set; | |
1546 | if (root->lookup) | |
1547 | set = root->lookup(root, namespaces); | |
1548 | return set; | |
1549 | } | |
1550 | ||
e51b6ba0 EB |
1551 | static struct list_head * |
1552 | lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces) | |
805b5d5e | 1553 | { |
73455092 AV |
1554 | struct ctl_table_set *set = lookup_header_set(root, namespaces); |
1555 | return &set->list; | |
e51b6ba0 EB |
1556 | } |
1557 | ||
1558 | struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces, | |
1559 | struct ctl_table_header *prev) | |
1560 | { | |
1561 | struct ctl_table_root *root; | |
1562 | struct list_head *header_list; | |
805b5d5e EB |
1563 | struct ctl_table_header *head; |
1564 | struct list_head *tmp; | |
e51b6ba0 | 1565 | |
805b5d5e EB |
1566 | spin_lock(&sysctl_lock); |
1567 | if (prev) { | |
e51b6ba0 | 1568 | head = prev; |
805b5d5e EB |
1569 | tmp = &prev->ctl_entry; |
1570 | unuse_table(prev); | |
1571 | goto next; | |
1572 | } | |
1573 | tmp = &root_table_header.ctl_entry; | |
1574 | for (;;) { | |
1575 | head = list_entry(tmp, struct ctl_table_header, ctl_entry); | |
1576 | ||
1577 | if (!use_table(head)) | |
1578 | goto next; | |
1579 | spin_unlock(&sysctl_lock); | |
1580 | return head; | |
1581 | next: | |
e51b6ba0 | 1582 | root = head->root; |
805b5d5e | 1583 | tmp = tmp->next; |
e51b6ba0 EB |
1584 | header_list = lookup_header_list(root, namespaces); |
1585 | if (tmp != header_list) | |
1586 | continue; | |
1587 | ||
1588 | do { | |
1589 | root = list_entry(root->root_list.next, | |
1590 | struct ctl_table_root, root_list); | |
1591 | if (root == &sysctl_table_root) | |
1592 | goto out; | |
1593 | header_list = lookup_header_list(root, namespaces); | |
1594 | } while (list_empty(header_list)); | |
1595 | tmp = header_list->next; | |
805b5d5e | 1596 | } |
e51b6ba0 | 1597 | out: |
805b5d5e EB |
1598 | spin_unlock(&sysctl_lock); |
1599 | return NULL; | |
1600 | } | |
1601 | ||
e51b6ba0 EB |
1602 | struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev) |
1603 | { | |
1604 | return __sysctl_head_next(current->nsproxy, prev); | |
1605 | } | |
1606 | ||
1607 | void register_sysctl_root(struct ctl_table_root *root) | |
1608 | { | |
1609 | spin_lock(&sysctl_lock); | |
1610 | list_add_tail(&root->root_list, &sysctl_table_root.root_list); | |
1611 | spin_unlock(&sysctl_lock); | |
1612 | } | |
1613 | ||
1da177e4 | 1614 | /* |
1ff007eb | 1615 | * sysctl_perm does NOT grant the superuser all rights automatically, because |
1da177e4 LT |
1616 | * some sysctl variables are readonly even to root. |
1617 | */ | |
1618 | ||
1619 | static int test_perm(int mode, int op) | |
1620 | { | |
76aac0e9 | 1621 | if (!current_euid()) |
1da177e4 LT |
1622 | mode >>= 6; |
1623 | else if (in_egroup_p(0)) | |
1624 | mode >>= 3; | |
e6305c43 | 1625 | if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0) |
1da177e4 LT |
1626 | return 0; |
1627 | return -EACCES; | |
1628 | } | |
1629 | ||
d7321cd6 | 1630 | int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op) |
1da177e4 LT |
1631 | { |
1632 | int error; | |
d7321cd6 PE |
1633 | int mode; |
1634 | ||
e6305c43 | 1635 | error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC)); |
1da177e4 LT |
1636 | if (error) |
1637 | return error; | |
d7321cd6 PE |
1638 | |
1639 | if (root->permissions) | |
1640 | mode = root->permissions(root, current->nsproxy, table); | |
1641 | else | |
1642 | mode = table->mode; | |
1643 | ||
1644 | return test_perm(mode, op); | |
1da177e4 LT |
1645 | } |
1646 | ||
d912b0cc EB |
1647 | static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table) |
1648 | { | |
2315ffa0 | 1649 | for (; table->procname; table++) { |
d912b0cc EB |
1650 | table->parent = parent; |
1651 | if (table->child) | |
1652 | sysctl_set_parent(table, table->child); | |
1653 | } | |
1654 | } | |
1655 | ||
1656 | static __init int sysctl_init(void) | |
1657 | { | |
1658 | sysctl_set_parent(NULL, root_table); | |
88f458e4 HS |
1659 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
1660 | { | |
1661 | int err; | |
1662 | err = sysctl_check_table(current->nsproxy, root_table); | |
1663 | } | |
1664 | #endif | |
d912b0cc EB |
1665 | return 0; |
1666 | } | |
1667 | ||
1668 | core_initcall(sysctl_init); | |
1669 | ||
bfbcf034 AV |
1670 | static struct ctl_table *is_branch_in(struct ctl_table *branch, |
1671 | struct ctl_table *table) | |
ae7edecc AV |
1672 | { |
1673 | struct ctl_table *p; | |
1674 | const char *s = branch->procname; | |
1675 | ||
1676 | /* branch should have named subdirectory as its first element */ | |
1677 | if (!s || !branch->child) | |
bfbcf034 | 1678 | return NULL; |
ae7edecc AV |
1679 | |
1680 | /* ... and nothing else */ | |
2315ffa0 | 1681 | if (branch[1].procname) |
bfbcf034 | 1682 | return NULL; |
ae7edecc AV |
1683 | |
1684 | /* table should contain subdirectory with the same name */ | |
2315ffa0 | 1685 | for (p = table; p->procname; p++) { |
ae7edecc AV |
1686 | if (!p->child) |
1687 | continue; | |
1688 | if (p->procname && strcmp(p->procname, s) == 0) | |
bfbcf034 | 1689 | return p; |
ae7edecc | 1690 | } |
bfbcf034 | 1691 | return NULL; |
ae7edecc AV |
1692 | } |
1693 | ||
1694 | /* see if attaching q to p would be an improvement */ | |
1695 | static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q) | |
1696 | { | |
1697 | struct ctl_table *to = p->ctl_table, *by = q->ctl_table; | |
bfbcf034 | 1698 | struct ctl_table *next; |
ae7edecc AV |
1699 | int is_better = 0; |
1700 | int not_in_parent = !p->attached_by; | |
1701 | ||
bfbcf034 | 1702 | while ((next = is_branch_in(by, to)) != NULL) { |
ae7edecc AV |
1703 | if (by == q->attached_by) |
1704 | is_better = 1; | |
1705 | if (to == p->attached_by) | |
1706 | not_in_parent = 1; | |
1707 | by = by->child; | |
bfbcf034 | 1708 | to = next->child; |
ae7edecc AV |
1709 | } |
1710 | ||
1711 | if (is_better && not_in_parent) { | |
1712 | q->attached_by = by; | |
1713 | q->attached_to = to; | |
1714 | q->parent = p; | |
1715 | } | |
1716 | } | |
1717 | ||
1da177e4 | 1718 | /** |
e51b6ba0 EB |
1719 | * __register_sysctl_paths - register a sysctl hierarchy |
1720 | * @root: List of sysctl headers to register on | |
1721 | * @namespaces: Data to compute which lists of sysctl entries are visible | |
29e796fd | 1722 | * @path: The path to the directory the sysctl table is in. |
1da177e4 | 1723 | * @table: the top-level table structure |
1da177e4 LT |
1724 | * |
1725 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
29e796fd | 1726 | * array. A completely 0 filled entry terminates the table. |
1da177e4 | 1727 | * |
d8217f07 | 1728 | * The members of the &struct ctl_table structure are used as follows: |
1da177e4 | 1729 | * |
1da177e4 LT |
1730 | * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not |
1731 | * enter a sysctl file | |
1732 | * | |
1733 | * data - a pointer to data for use by proc_handler | |
1734 | * | |
1735 | * maxlen - the maximum size in bytes of the data | |
1736 | * | |
1737 | * mode - the file permissions for the /proc/sys file, and for sysctl(2) | |
1738 | * | |
1739 | * child - a pointer to the child sysctl table if this entry is a directory, or | |
1740 | * %NULL. | |
1741 | * | |
1742 | * proc_handler - the text handler routine (described below) | |
1743 | * | |
1da177e4 LT |
1744 | * de - for internal use by the sysctl routines |
1745 | * | |
1746 | * extra1, extra2 - extra pointers usable by the proc handler routines | |
1747 | * | |
1748 | * Leaf nodes in the sysctl tree will be represented by a single file | |
1749 | * under /proc; non-leaf nodes will be represented by directories. | |
1750 | * | |
1751 | * sysctl(2) can automatically manage read and write requests through | |
1752 | * the sysctl table. The data and maxlen fields of the ctl_table | |
1753 | * struct enable minimal validation of the values being written to be | |
1754 | * performed, and the mode field allows minimal authentication. | |
1755 | * | |
1da177e4 LT |
1756 | * There must be a proc_handler routine for any terminal nodes |
1757 | * mirrored under /proc/sys (non-terminals are handled by a built-in | |
1758 | * directory handler). Several default handlers are available to | |
1759 | * cover common cases - | |
1760 | * | |
1761 | * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(), | |
1762 | * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(), | |
1763 | * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax() | |
1764 | * | |
1765 | * It is the handler's job to read the input buffer from user memory | |
1766 | * and process it. The handler should return 0 on success. | |
1767 | * | |
1768 | * This routine returns %NULL on a failure to register, and a pointer | |
1769 | * to the table header on success. | |
1770 | */ | |
e51b6ba0 EB |
1771 | struct ctl_table_header *__register_sysctl_paths( |
1772 | struct ctl_table_root *root, | |
1773 | struct nsproxy *namespaces, | |
1774 | const struct ctl_path *path, struct ctl_table *table) | |
1da177e4 | 1775 | { |
29e796fd EB |
1776 | struct ctl_table_header *header; |
1777 | struct ctl_table *new, **prevp; | |
1778 | unsigned int n, npath; | |
ae7edecc | 1779 | struct ctl_table_set *set; |
29e796fd EB |
1780 | |
1781 | /* Count the path components */ | |
2315ffa0 | 1782 | for (npath = 0; path[npath].procname; ++npath) |
29e796fd EB |
1783 | ; |
1784 | ||
1785 | /* | |
1786 | * For each path component, allocate a 2-element ctl_table array. | |
1787 | * The first array element will be filled with the sysctl entry | |
2315ffa0 | 1788 | * for this, the second will be the sentinel (procname == 0). |
29e796fd EB |
1789 | * |
1790 | * We allocate everything in one go so that we don't have to | |
1791 | * worry about freeing additional memory in unregister_sysctl_table. | |
1792 | */ | |
1793 | header = kzalloc(sizeof(struct ctl_table_header) + | |
1794 | (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL); | |
1795 | if (!header) | |
1da177e4 | 1796 | return NULL; |
29e796fd EB |
1797 | |
1798 | new = (struct ctl_table *) (header + 1); | |
1799 | ||
1800 | /* Now connect the dots */ | |
1801 | prevp = &header->ctl_table; | |
1802 | for (n = 0; n < npath; ++n, ++path) { | |
1803 | /* Copy the procname */ | |
1804 | new->procname = path->procname; | |
29e796fd EB |
1805 | new->mode = 0555; |
1806 | ||
1807 | *prevp = new; | |
1808 | prevp = &new->child; | |
1809 | ||
1810 | new += 2; | |
1811 | } | |
1812 | *prevp = table; | |
23eb06de | 1813 | header->ctl_table_arg = table; |
29e796fd EB |
1814 | |
1815 | INIT_LIST_HEAD(&header->ctl_entry); | |
1816 | header->used = 0; | |
1817 | header->unregistering = NULL; | |
e51b6ba0 | 1818 | header->root = root; |
29e796fd | 1819 | sysctl_set_parent(NULL, header->ctl_table); |
f7e6ced4 | 1820 | header->count = 1; |
88f458e4 | 1821 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
e51b6ba0 | 1822 | if (sysctl_check_table(namespaces, header->ctl_table)) { |
29e796fd | 1823 | kfree(header); |
fc6cd25b EB |
1824 | return NULL; |
1825 | } | |
88f458e4 | 1826 | #endif |
330d57fb | 1827 | spin_lock(&sysctl_lock); |
73455092 | 1828 | header->set = lookup_header_set(root, namespaces); |
ae7edecc AV |
1829 | header->attached_by = header->ctl_table; |
1830 | header->attached_to = root_table; | |
1831 | header->parent = &root_table_header; | |
1832 | for (set = header->set; set; set = set->parent) { | |
1833 | struct ctl_table_header *p; | |
1834 | list_for_each_entry(p, &set->list, ctl_entry) { | |
1835 | if (p->unregistering) | |
1836 | continue; | |
1837 | try_attach(p, header); | |
1838 | } | |
1839 | } | |
1840 | header->parent->count++; | |
73455092 | 1841 | list_add_tail(&header->ctl_entry, &header->set->list); |
330d57fb | 1842 | spin_unlock(&sysctl_lock); |
29e796fd EB |
1843 | |
1844 | return header; | |
1845 | } | |
1846 | ||
e51b6ba0 EB |
1847 | /** |
1848 | * register_sysctl_table_path - register a sysctl table hierarchy | |
1849 | * @path: The path to the directory the sysctl table is in. | |
1850 | * @table: the top-level table structure | |
1851 | * | |
1852 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
1853 | * array. A completely 0 filled entry terminates the table. | |
1854 | * | |
1855 | * See __register_sysctl_paths for more details. | |
1856 | */ | |
1857 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, | |
1858 | struct ctl_table *table) | |
1859 | { | |
1860 | return __register_sysctl_paths(&sysctl_table_root, current->nsproxy, | |
1861 | path, table); | |
1862 | } | |
1863 | ||
29e796fd EB |
1864 | /** |
1865 | * register_sysctl_table - register a sysctl table hierarchy | |
1866 | * @table: the top-level table structure | |
1867 | * | |
1868 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
1869 | * array. A completely 0 filled entry terminates the table. | |
1870 | * | |
1871 | * See register_sysctl_paths for more details. | |
1872 | */ | |
1873 | struct ctl_table_header *register_sysctl_table(struct ctl_table *table) | |
1874 | { | |
1875 | static const struct ctl_path null_path[] = { {} }; | |
1876 | ||
1877 | return register_sysctl_paths(null_path, table); | |
1da177e4 LT |
1878 | } |
1879 | ||
1880 | /** | |
1881 | * unregister_sysctl_table - unregister a sysctl table hierarchy | |
1882 | * @header: the header returned from register_sysctl_table | |
1883 | * | |
1884 | * Unregisters the sysctl table and all children. proc entries may not | |
1885 | * actually be removed until they are no longer used by anyone. | |
1886 | */ | |
1887 | void unregister_sysctl_table(struct ctl_table_header * header) | |
1888 | { | |
330d57fb | 1889 | might_sleep(); |
f1dad166 PE |
1890 | |
1891 | if (header == NULL) | |
1892 | return; | |
1893 | ||
330d57fb AV |
1894 | spin_lock(&sysctl_lock); |
1895 | start_unregistering(header); | |
ae7edecc AV |
1896 | if (!--header->parent->count) { |
1897 | WARN_ON(1); | |
1898 | kfree(header->parent); | |
1899 | } | |
f7e6ced4 AV |
1900 | if (!--header->count) |
1901 | kfree(header); | |
330d57fb | 1902 | spin_unlock(&sysctl_lock); |
1da177e4 LT |
1903 | } |
1904 | ||
9043476f AV |
1905 | int sysctl_is_seen(struct ctl_table_header *p) |
1906 | { | |
1907 | struct ctl_table_set *set = p->set; | |
1908 | int res; | |
1909 | spin_lock(&sysctl_lock); | |
1910 | if (p->unregistering) | |
1911 | res = 0; | |
1912 | else if (!set->is_seen) | |
1913 | res = 1; | |
1914 | else | |
1915 | res = set->is_seen(set); | |
1916 | spin_unlock(&sysctl_lock); | |
1917 | return res; | |
1918 | } | |
1919 | ||
73455092 AV |
1920 | void setup_sysctl_set(struct ctl_table_set *p, |
1921 | struct ctl_table_set *parent, | |
1922 | int (*is_seen)(struct ctl_table_set *)) | |
1923 | { | |
1924 | INIT_LIST_HEAD(&p->list); | |
1925 | p->parent = parent ? parent : &sysctl_table_root.default_set; | |
1926 | p->is_seen = is_seen; | |
1927 | } | |
1928 | ||
b89a8171 | 1929 | #else /* !CONFIG_SYSCTL */ |
d8217f07 | 1930 | struct ctl_table_header *register_sysctl_table(struct ctl_table * table) |
b89a8171 EB |
1931 | { |
1932 | return NULL; | |
1933 | } | |
1934 | ||
29e796fd EB |
1935 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, |
1936 | struct ctl_table *table) | |
1937 | { | |
1938 | return NULL; | |
1939 | } | |
1940 | ||
b89a8171 EB |
1941 | void unregister_sysctl_table(struct ctl_table_header * table) |
1942 | { | |
1943 | } | |
1944 | ||
73455092 AV |
1945 | void setup_sysctl_set(struct ctl_table_set *p, |
1946 | struct ctl_table_set *parent, | |
1947 | int (*is_seen)(struct ctl_table_set *)) | |
1948 | { | |
1949 | } | |
1950 | ||
f7e6ced4 AV |
1951 | void sysctl_head_put(struct ctl_table_header *head) |
1952 | { | |
1953 | } | |
1954 | ||
b89a8171 EB |
1955 | #endif /* CONFIG_SYSCTL */ |
1956 | ||
1da177e4 LT |
1957 | /* |
1958 | * /proc/sys support | |
1959 | */ | |
1960 | ||
b89a8171 | 1961 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1962 | |
b1ba4ddd | 1963 | static int _proc_do_string(void* data, int maxlen, int write, |
8d65af78 | 1964 | void __user *buffer, |
b1ba4ddd | 1965 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1966 | { |
1967 | size_t len; | |
1968 | char __user *p; | |
1969 | char c; | |
8d060877 ON |
1970 | |
1971 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1972 | *lenp = 0; |
1973 | return 0; | |
1974 | } | |
8d060877 | 1975 | |
1da177e4 LT |
1976 | if (write) { |
1977 | len = 0; | |
1978 | p = buffer; | |
1979 | while (len < *lenp) { | |
1980 | if (get_user(c, p++)) | |
1981 | return -EFAULT; | |
1982 | if (c == 0 || c == '\n') | |
1983 | break; | |
1984 | len++; | |
1985 | } | |
f5dd3d6f SV |
1986 | if (len >= maxlen) |
1987 | len = maxlen-1; | |
1988 | if(copy_from_user(data, buffer, len)) | |
1da177e4 | 1989 | return -EFAULT; |
f5dd3d6f | 1990 | ((char *) data)[len] = 0; |
1da177e4 LT |
1991 | *ppos += *lenp; |
1992 | } else { | |
f5dd3d6f SV |
1993 | len = strlen(data); |
1994 | if (len > maxlen) | |
1995 | len = maxlen; | |
8d060877 ON |
1996 | |
1997 | if (*ppos > len) { | |
1998 | *lenp = 0; | |
1999 | return 0; | |
2000 | } | |
2001 | ||
2002 | data += *ppos; | |
2003 | len -= *ppos; | |
2004 | ||
1da177e4 LT |
2005 | if (len > *lenp) |
2006 | len = *lenp; | |
2007 | if (len) | |
f5dd3d6f | 2008 | if(copy_to_user(buffer, data, len)) |
1da177e4 LT |
2009 | return -EFAULT; |
2010 | if (len < *lenp) { | |
2011 | if(put_user('\n', ((char __user *) buffer) + len)) | |
2012 | return -EFAULT; | |
2013 | len++; | |
2014 | } | |
2015 | *lenp = len; | |
2016 | *ppos += len; | |
2017 | } | |
2018 | return 0; | |
2019 | } | |
2020 | ||
f5dd3d6f SV |
2021 | /** |
2022 | * proc_dostring - read a string sysctl | |
2023 | * @table: the sysctl table | |
2024 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
2025 | * @buffer: the user buffer |
2026 | * @lenp: the size of the user buffer | |
2027 | * @ppos: file position | |
2028 | * | |
2029 | * Reads/writes a string from/to the user buffer. If the kernel | |
2030 | * buffer provided is not large enough to hold the string, the | |
2031 | * string is truncated. The copied string is %NULL-terminated. | |
2032 | * If the string is being read by the user process, it is copied | |
2033 | * and a newline '\n' is added. It is truncated if the buffer is | |
2034 | * not large enough. | |
2035 | * | |
2036 | * Returns 0 on success. | |
2037 | */ | |
8d65af78 | 2038 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2039 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2040 | { | |
8d65af78 | 2041 | return _proc_do_string(table->data, table->maxlen, write, |
f5dd3d6f SV |
2042 | buffer, lenp, ppos); |
2043 | } | |
2044 | ||
1da177e4 LT |
2045 | |
2046 | static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp, | |
2047 | int *valp, | |
2048 | int write, void *data) | |
2049 | { | |
2050 | if (write) { | |
2051 | *valp = *negp ? -*lvalp : *lvalp; | |
2052 | } else { | |
2053 | int val = *valp; | |
2054 | if (val < 0) { | |
2055 | *negp = -1; | |
2056 | *lvalp = (unsigned long)-val; | |
2057 | } else { | |
2058 | *negp = 0; | |
2059 | *lvalp = (unsigned long)val; | |
2060 | } | |
2061 | } | |
2062 | return 0; | |
2063 | } | |
2064 | ||
d8217f07 | 2065 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2066 | int write, void __user *buffer, |
fcfbd547 | 2067 | size_t *lenp, loff_t *ppos, |
1da177e4 LT |
2068 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, |
2069 | int write, void *data), | |
2070 | void *data) | |
2071 | { | |
2072 | #define TMPBUFLEN 21 | |
7338f299 | 2073 | int *i, vleft, first = 1, neg; |
1da177e4 LT |
2074 | unsigned long lval; |
2075 | size_t left, len; | |
2076 | ||
2077 | char buf[TMPBUFLEN], *p; | |
2078 | char __user *s = buffer; | |
2079 | ||
fcfbd547 | 2080 | if (!tbl_data || !table->maxlen || !*lenp || |
1da177e4 LT |
2081 | (*ppos && !write)) { |
2082 | *lenp = 0; | |
2083 | return 0; | |
2084 | } | |
2085 | ||
fcfbd547 | 2086 | i = (int *) tbl_data; |
1da177e4 LT |
2087 | vleft = table->maxlen / sizeof(*i); |
2088 | left = *lenp; | |
2089 | ||
2090 | if (!conv) | |
2091 | conv = do_proc_dointvec_conv; | |
2092 | ||
2093 | for (; left && vleft--; i++, first=0) { | |
2094 | if (write) { | |
2095 | while (left) { | |
2096 | char c; | |
2097 | if (get_user(c, s)) | |
2098 | return -EFAULT; | |
2099 | if (!isspace(c)) | |
2100 | break; | |
2101 | left--; | |
2102 | s++; | |
2103 | } | |
2104 | if (!left) | |
2105 | break; | |
2106 | neg = 0; | |
2107 | len = left; | |
2108 | if (len > sizeof(buf) - 1) | |
2109 | len = sizeof(buf) - 1; | |
2110 | if (copy_from_user(buf, s, len)) | |
2111 | return -EFAULT; | |
2112 | buf[len] = 0; | |
2113 | p = buf; | |
2114 | if (*p == '-' && left > 1) { | |
2115 | neg = 1; | |
bd9b0bac | 2116 | p++; |
1da177e4 LT |
2117 | } |
2118 | if (*p < '0' || *p > '9') | |
2119 | break; | |
2120 | ||
2121 | lval = simple_strtoul(p, &p, 0); | |
2122 | ||
2123 | len = p-buf; | |
2124 | if ((len < left) && *p && !isspace(*p)) | |
2125 | break; | |
1da177e4 LT |
2126 | s += len; |
2127 | left -= len; | |
2128 | ||
2129 | if (conv(&neg, &lval, i, 1, data)) | |
2130 | break; | |
2131 | } else { | |
2132 | p = buf; | |
2133 | if (!first) | |
2134 | *p++ = '\t'; | |
2135 | ||
2136 | if (conv(&neg, &lval, i, 0, data)) | |
2137 | break; | |
2138 | ||
2139 | sprintf(p, "%s%lu", neg ? "-" : "", lval); | |
2140 | len = strlen(buf); | |
2141 | if (len > left) | |
2142 | len = left; | |
2143 | if(copy_to_user(s, buf, len)) | |
2144 | return -EFAULT; | |
2145 | left -= len; | |
2146 | s += len; | |
2147 | } | |
2148 | } | |
2149 | ||
2150 | if (!write && !first && left) { | |
2151 | if(put_user('\n', s)) | |
2152 | return -EFAULT; | |
2153 | left--, s++; | |
2154 | } | |
2155 | if (write) { | |
2156 | while (left) { | |
2157 | char c; | |
2158 | if (get_user(c, s++)) | |
2159 | return -EFAULT; | |
2160 | if (!isspace(c)) | |
2161 | break; | |
2162 | left--; | |
2163 | } | |
2164 | } | |
2165 | if (write && first) | |
2166 | return -EINVAL; | |
2167 | *lenp -= left; | |
2168 | *ppos += *lenp; | |
2169 | return 0; | |
2170 | #undef TMPBUFLEN | |
2171 | } | |
2172 | ||
8d65af78 | 2173 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 KK |
2174 | void __user *buffer, size_t *lenp, loff_t *ppos, |
2175 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, | |
2176 | int write, void *data), | |
2177 | void *data) | |
2178 | { | |
8d65af78 | 2179 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2180 | buffer, lenp, ppos, conv, data); |
2181 | } | |
2182 | ||
1da177e4 LT |
2183 | /** |
2184 | * proc_dointvec - read a vector of integers | |
2185 | * @table: the sysctl table | |
2186 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2187 | * @buffer: the user buffer |
2188 | * @lenp: the size of the user buffer | |
2189 | * @ppos: file position | |
2190 | * | |
2191 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2192 | * values from/to the user buffer, treated as an ASCII string. | |
2193 | * | |
2194 | * Returns 0 on success. | |
2195 | */ | |
8d65af78 | 2196 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2197 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2198 | { | |
8d65af78 | 2199 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2200 | NULL,NULL); |
2201 | } | |
2202 | ||
34f5a398 | 2203 | /* |
25ddbb18 AK |
2204 | * Taint values can only be increased |
2205 | * This means we can safely use a temporary. | |
34f5a398 | 2206 | */ |
8d65af78 | 2207 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2208 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2209 | { | |
25ddbb18 AK |
2210 | struct ctl_table t; |
2211 | unsigned long tmptaint = get_taint(); | |
2212 | int err; | |
34f5a398 | 2213 | |
91fcd412 | 2214 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2215 | return -EPERM; |
2216 | ||
25ddbb18 AK |
2217 | t = *table; |
2218 | t.data = &tmptaint; | |
8d65af78 | 2219 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2220 | if (err < 0) |
2221 | return err; | |
2222 | ||
2223 | if (write) { | |
2224 | /* | |
2225 | * Poor man's atomic or. Not worth adding a primitive | |
2226 | * to everyone's atomic.h for this | |
2227 | */ | |
2228 | int i; | |
2229 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2230 | if ((tmptaint >> i) & 1) | |
2231 | add_taint(i); | |
2232 | } | |
2233 | } | |
2234 | ||
2235 | return err; | |
34f5a398 TT |
2236 | } |
2237 | ||
1da177e4 LT |
2238 | struct do_proc_dointvec_minmax_conv_param { |
2239 | int *min; | |
2240 | int *max; | |
2241 | }; | |
2242 | ||
2243 | static int do_proc_dointvec_minmax_conv(int *negp, unsigned long *lvalp, | |
2244 | int *valp, | |
2245 | int write, void *data) | |
2246 | { | |
2247 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2248 | if (write) { | |
2249 | int val = *negp ? -*lvalp : *lvalp; | |
2250 | if ((param->min && *param->min > val) || | |
2251 | (param->max && *param->max < val)) | |
2252 | return -EINVAL; | |
2253 | *valp = val; | |
2254 | } else { | |
2255 | int val = *valp; | |
2256 | if (val < 0) { | |
2257 | *negp = -1; | |
2258 | *lvalp = (unsigned long)-val; | |
2259 | } else { | |
2260 | *negp = 0; | |
2261 | *lvalp = (unsigned long)val; | |
2262 | } | |
2263 | } | |
2264 | return 0; | |
2265 | } | |
2266 | ||
2267 | /** | |
2268 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2269 | * @table: the sysctl table | |
2270 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2271 | * @buffer: the user buffer |
2272 | * @lenp: the size of the user buffer | |
2273 | * @ppos: file position | |
2274 | * | |
2275 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2276 | * values from/to the user buffer, treated as an ASCII string. | |
2277 | * | |
2278 | * This routine will ensure the values are within the range specified by | |
2279 | * table->extra1 (min) and table->extra2 (max). | |
2280 | * | |
2281 | * Returns 0 on success. | |
2282 | */ | |
8d65af78 | 2283 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2284 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2285 | { | |
2286 | struct do_proc_dointvec_minmax_conv_param param = { | |
2287 | .min = (int *) table->extra1, | |
2288 | .max = (int *) table->extra2, | |
2289 | }; | |
8d65af78 | 2290 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2291 | do_proc_dointvec_minmax_conv, ¶m); |
2292 | } | |
2293 | ||
d8217f07 | 2294 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2295 | void __user *buffer, |
2296 | size_t *lenp, loff_t *ppos, | |
2297 | unsigned long convmul, | |
2298 | unsigned long convdiv) | |
2299 | { | |
2300 | #define TMPBUFLEN 21 | |
2301 | unsigned long *i, *min, *max, val; | |
2302 | int vleft, first=1, neg; | |
2303 | size_t len, left; | |
2304 | char buf[TMPBUFLEN], *p; | |
2305 | char __user *s = buffer; | |
2306 | ||
fcfbd547 | 2307 | if (!data || !table->maxlen || !*lenp || |
1da177e4 LT |
2308 | (*ppos && !write)) { |
2309 | *lenp = 0; | |
2310 | return 0; | |
2311 | } | |
2312 | ||
fcfbd547 | 2313 | i = (unsigned long *) data; |
1da177e4 LT |
2314 | min = (unsigned long *) table->extra1; |
2315 | max = (unsigned long *) table->extra2; | |
2316 | vleft = table->maxlen / sizeof(unsigned long); | |
2317 | left = *lenp; | |
2318 | ||
2319 | for (; left && vleft--; i++, min++, max++, first=0) { | |
2320 | if (write) { | |
2321 | while (left) { | |
2322 | char c; | |
2323 | if (get_user(c, s)) | |
2324 | return -EFAULT; | |
2325 | if (!isspace(c)) | |
2326 | break; | |
2327 | left--; | |
2328 | s++; | |
2329 | } | |
2330 | if (!left) | |
2331 | break; | |
2332 | neg = 0; | |
2333 | len = left; | |
2334 | if (len > TMPBUFLEN-1) | |
2335 | len = TMPBUFLEN-1; | |
2336 | if (copy_from_user(buf, s, len)) | |
2337 | return -EFAULT; | |
2338 | buf[len] = 0; | |
2339 | p = buf; | |
2340 | if (*p == '-' && left > 1) { | |
2341 | neg = 1; | |
bd9b0bac | 2342 | p++; |
1da177e4 LT |
2343 | } |
2344 | if (*p < '0' || *p > '9') | |
2345 | break; | |
2346 | val = simple_strtoul(p, &p, 0) * convmul / convdiv ; | |
2347 | len = p-buf; | |
2348 | if ((len < left) && *p && !isspace(*p)) | |
2349 | break; | |
2350 | if (neg) | |
2351 | val = -val; | |
2352 | s += len; | |
2353 | left -= len; | |
2354 | ||
2355 | if(neg) | |
2356 | continue; | |
2357 | if ((min && val < *min) || (max && val > *max)) | |
2358 | continue; | |
2359 | *i = val; | |
2360 | } else { | |
2361 | p = buf; | |
2362 | if (!first) | |
2363 | *p++ = '\t'; | |
2364 | sprintf(p, "%lu", convdiv * (*i) / convmul); | |
2365 | len = strlen(buf); | |
2366 | if (len > left) | |
2367 | len = left; | |
2368 | if(copy_to_user(s, buf, len)) | |
2369 | return -EFAULT; | |
2370 | left -= len; | |
2371 | s += len; | |
2372 | } | |
2373 | } | |
2374 | ||
2375 | if (!write && !first && left) { | |
2376 | if(put_user('\n', s)) | |
2377 | return -EFAULT; | |
2378 | left--, s++; | |
2379 | } | |
2380 | if (write) { | |
2381 | while (left) { | |
2382 | char c; | |
2383 | if (get_user(c, s++)) | |
2384 | return -EFAULT; | |
2385 | if (!isspace(c)) | |
2386 | break; | |
2387 | left--; | |
2388 | } | |
2389 | } | |
2390 | if (write && first) | |
2391 | return -EINVAL; | |
2392 | *lenp -= left; | |
2393 | *ppos += *lenp; | |
2394 | return 0; | |
2395 | #undef TMPBUFLEN | |
2396 | } | |
2397 | ||
d8217f07 | 2398 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2399 | void __user *buffer, |
2400 | size_t *lenp, loff_t *ppos, | |
2401 | unsigned long convmul, | |
2402 | unsigned long convdiv) | |
2403 | { | |
2404 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2405 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2406 | } |
2407 | ||
1da177e4 LT |
2408 | /** |
2409 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2410 | * @table: the sysctl table | |
2411 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2412 | * @buffer: the user buffer |
2413 | * @lenp: the size of the user buffer | |
2414 | * @ppos: file position | |
2415 | * | |
2416 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2417 | * values from/to the user buffer, treated as an ASCII string. | |
2418 | * | |
2419 | * This routine will ensure the values are within the range specified by | |
2420 | * table->extra1 (min) and table->extra2 (max). | |
2421 | * | |
2422 | * Returns 0 on success. | |
2423 | */ | |
8d65af78 | 2424 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2425 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2426 | { | |
8d65af78 | 2427 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2428 | } |
2429 | ||
2430 | /** | |
2431 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2432 | * @table: the sysctl table | |
2433 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2434 | * @buffer: the user buffer |
2435 | * @lenp: the size of the user buffer | |
2436 | * @ppos: file position | |
2437 | * | |
2438 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2439 | * values from/to the user buffer, treated as an ASCII string. The values | |
2440 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2441 | * | |
2442 | * This routine will ensure the values are within the range specified by | |
2443 | * table->extra1 (min) and table->extra2 (max). | |
2444 | * | |
2445 | * Returns 0 on success. | |
2446 | */ | |
d8217f07 | 2447 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2448 | void __user *buffer, |
2449 | size_t *lenp, loff_t *ppos) | |
2450 | { | |
8d65af78 | 2451 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2452 | lenp, ppos, HZ, 1000l); |
2453 | } | |
2454 | ||
2455 | ||
2456 | static int do_proc_dointvec_jiffies_conv(int *negp, unsigned long *lvalp, | |
2457 | int *valp, | |
2458 | int write, void *data) | |
2459 | { | |
2460 | if (write) { | |
cba9f33d BS |
2461 | if (*lvalp > LONG_MAX / HZ) |
2462 | return 1; | |
1da177e4 LT |
2463 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2464 | } else { | |
2465 | int val = *valp; | |
2466 | unsigned long lval; | |
2467 | if (val < 0) { | |
2468 | *negp = -1; | |
2469 | lval = (unsigned long)-val; | |
2470 | } else { | |
2471 | *negp = 0; | |
2472 | lval = (unsigned long)val; | |
2473 | } | |
2474 | *lvalp = lval / HZ; | |
2475 | } | |
2476 | return 0; | |
2477 | } | |
2478 | ||
2479 | static int do_proc_dointvec_userhz_jiffies_conv(int *negp, unsigned long *lvalp, | |
2480 | int *valp, | |
2481 | int write, void *data) | |
2482 | { | |
2483 | if (write) { | |
cba9f33d BS |
2484 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2485 | return 1; | |
1da177e4 LT |
2486 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2487 | } else { | |
2488 | int val = *valp; | |
2489 | unsigned long lval; | |
2490 | if (val < 0) { | |
2491 | *negp = -1; | |
2492 | lval = (unsigned long)-val; | |
2493 | } else { | |
2494 | *negp = 0; | |
2495 | lval = (unsigned long)val; | |
2496 | } | |
2497 | *lvalp = jiffies_to_clock_t(lval); | |
2498 | } | |
2499 | return 0; | |
2500 | } | |
2501 | ||
2502 | static int do_proc_dointvec_ms_jiffies_conv(int *negp, unsigned long *lvalp, | |
2503 | int *valp, | |
2504 | int write, void *data) | |
2505 | { | |
2506 | if (write) { | |
2507 | *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); | |
2508 | } else { | |
2509 | int val = *valp; | |
2510 | unsigned long lval; | |
2511 | if (val < 0) { | |
2512 | *negp = -1; | |
2513 | lval = (unsigned long)-val; | |
2514 | } else { | |
2515 | *negp = 0; | |
2516 | lval = (unsigned long)val; | |
2517 | } | |
2518 | *lvalp = jiffies_to_msecs(lval); | |
2519 | } | |
2520 | return 0; | |
2521 | } | |
2522 | ||
2523 | /** | |
2524 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2525 | * @table: the sysctl table | |
2526 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2527 | * @buffer: the user buffer |
2528 | * @lenp: the size of the user buffer | |
2529 | * @ppos: file position | |
2530 | * | |
2531 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2532 | * values from/to the user buffer, treated as an ASCII string. | |
2533 | * The values read are assumed to be in seconds, and are converted into | |
2534 | * jiffies. | |
2535 | * | |
2536 | * Returns 0 on success. | |
2537 | */ | |
8d65af78 | 2538 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2539 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2540 | { | |
8d65af78 | 2541 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2542 | do_proc_dointvec_jiffies_conv,NULL); |
2543 | } | |
2544 | ||
2545 | /** | |
2546 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2547 | * @table: the sysctl table | |
2548 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2549 | * @buffer: the user buffer |
2550 | * @lenp: the size of the user buffer | |
1e5d5331 | 2551 | * @ppos: pointer to the file position |
1da177e4 LT |
2552 | * |
2553 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2554 | * values from/to the user buffer, treated as an ASCII string. | |
2555 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2556 | * are converted into jiffies. | |
2557 | * | |
2558 | * Returns 0 on success. | |
2559 | */ | |
8d65af78 | 2560 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2561 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2562 | { | |
8d65af78 | 2563 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2564 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2565 | } | |
2566 | ||
2567 | /** | |
2568 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2569 | * @table: the sysctl table | |
2570 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2571 | * @buffer: the user buffer |
2572 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2573 | * @ppos: file position |
2574 | * @ppos: the current position in the file | |
1da177e4 LT |
2575 | * |
2576 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2577 | * values from/to the user buffer, treated as an ASCII string. | |
2578 | * The values read are assumed to be in 1/1000 seconds, and | |
2579 | * are converted into jiffies. | |
2580 | * | |
2581 | * Returns 0 on success. | |
2582 | */ | |
8d65af78 | 2583 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2584 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2585 | { | |
8d65af78 | 2586 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2587 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2588 | } | |
2589 | ||
8d65af78 | 2590 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2591 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2592 | { | |
2593 | struct pid *new_pid; | |
2594 | pid_t tmp; | |
2595 | int r; | |
2596 | ||
6c5f3e7b | 2597 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2598 | |
8d65af78 | 2599 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2600 | lenp, ppos, NULL, NULL); |
2601 | if (r || !write) | |
2602 | return r; | |
2603 | ||
2604 | new_pid = find_get_pid(tmp); | |
2605 | if (!new_pid) | |
2606 | return -ESRCH; | |
2607 | ||
2608 | put_pid(xchg(&cad_pid, new_pid)); | |
2609 | return 0; | |
2610 | } | |
2611 | ||
1da177e4 LT |
2612 | #else /* CONFIG_PROC_FS */ |
2613 | ||
8d65af78 | 2614 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2615 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2616 | { | |
2617 | return -ENOSYS; | |
2618 | } | |
2619 | ||
8d65af78 | 2620 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2621 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2622 | { |
2623 | return -ENOSYS; | |
2624 | } | |
2625 | ||
8d65af78 | 2626 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2627 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2628 | { | |
2629 | return -ENOSYS; | |
2630 | } | |
2631 | ||
8d65af78 | 2632 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2633 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2634 | { | |
2635 | return -ENOSYS; | |
2636 | } | |
2637 | ||
8d65af78 | 2638 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2639 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2640 | { | |
2641 | return -ENOSYS; | |
2642 | } | |
2643 | ||
8d65af78 | 2644 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2645 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2646 | { | |
2647 | return -ENOSYS; | |
2648 | } | |
2649 | ||
8d65af78 | 2650 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2651 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2652 | { | |
2653 | return -ENOSYS; | |
2654 | } | |
2655 | ||
d8217f07 | 2656 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2657 | void __user *buffer, |
2658 | size_t *lenp, loff_t *ppos) | |
2659 | { | |
2660 | return -ENOSYS; | |
2661 | } | |
2662 | ||
2663 | ||
2664 | #endif /* CONFIG_PROC_FS */ | |
2665 | ||
1da177e4 LT |
2666 | /* |
2667 | * No sense putting this after each symbol definition, twice, | |
2668 | * exception granted :-) | |
2669 | */ | |
2670 | EXPORT_SYMBOL(proc_dointvec); | |
2671 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2672 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2673 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2674 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2675 | EXPORT_SYMBOL(proc_dostring); | |
2676 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2677 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); | |
2678 | EXPORT_SYMBOL(register_sysctl_table); | |
29e796fd | 2679 | EXPORT_SYMBOL(register_sysctl_paths); |
1da177e4 | 2680 | EXPORT_SYMBOL(unregister_sysctl_table); |