Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 LT |
21 | #include <linux/module.h> |
22 | #include <linux/mm.h> | |
23 | #include <linux/swap.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/sysctl.h> | |
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> |
b492e95b | 55 | #include <linux/pipe_fs_i.h> |
1da177e4 LT |
56 | |
57 | #include <asm/uaccess.h> | |
58 | #include <asm/processor.h> | |
59 | ||
29cbc78b AK |
60 | #ifdef CONFIG_X86 |
61 | #include <asm/nmi.h> | |
0741f4d2 | 62 | #include <asm/stacktrace.h> |
6e7c4025 | 63 | #include <asm/io.h> |
29cbc78b | 64 | #endif |
c55b7c3e DY |
65 | #ifdef CONFIG_BSD_PROCESS_ACCT |
66 | #include <linux/acct.h> | |
67 | #endif | |
4f0e056f DY |
68 | #ifdef CONFIG_RT_MUTEXES |
69 | #include <linux/rtmutex.h> | |
70 | #endif | |
2edf5e49 DY |
71 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
72 | #include <linux/lockdep.h> | |
73 | #endif | |
15485a46 DY |
74 | #ifdef CONFIG_CHR_DEV_SG |
75 | #include <scsi/sg.h> | |
76 | #endif | |
29cbc78b | 77 | |
7058cb02 | 78 | |
1da177e4 LT |
79 | #if defined(CONFIG_SYSCTL) |
80 | ||
81 | /* External variables not in a header file. */ | |
1da177e4 LT |
82 | extern int sysctl_overcommit_memory; |
83 | extern int sysctl_overcommit_ratio; | |
fadd8fbd | 84 | extern int sysctl_panic_on_oom; |
fe071d7e | 85 | extern int sysctl_oom_kill_allocating_task; |
fef1bdd6 | 86 | extern int sysctl_oom_dump_tasks; |
1da177e4 | 87 | extern int max_threads; |
1da177e4 | 88 | extern int core_uses_pid; |
d6e71144 | 89 | extern int suid_dumpable; |
1da177e4 | 90 | extern char core_pattern[]; |
a293980c | 91 | extern unsigned int core_pipe_limit; |
1da177e4 LT |
92 | extern int pid_max; |
93 | extern int min_free_kbytes; | |
1da177e4 | 94 | extern int pid_max_min, pid_max_max; |
9d0243bc | 95 | extern int sysctl_drop_caches; |
8ad4b1fb | 96 | extern int percpu_pagelist_fraction; |
bebfa101 | 97 | extern int compat_log; |
9745512c | 98 | extern int latencytop_enabled; |
eceea0b3 | 99 | extern int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
100 | #ifndef CONFIG_MMU |
101 | extern int sysctl_nr_trim_pages; | |
102 | #endif | |
cb684b5b | 103 | #ifdef CONFIG_BLOCK |
5e605b64 | 104 | extern int blk_iopoll_enabled; |
cb684b5b | 105 | #endif |
1da177e4 | 106 | |
c4f3b63f | 107 | /* Constants used for minimum and maximum */ |
195cf453 | 108 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
c4f3b63f | 109 | static int sixty = 60; |
9383d967 | 110 | static int neg_one = -1; |
c4f3b63f RT |
111 | #endif |
112 | ||
c4f3b63f | 113 | static int zero; |
cd5f9a4c LT |
114 | static int __maybe_unused one = 1; |
115 | static int __maybe_unused two = 2; | |
fc3501d4 | 116 | static unsigned long one_ul = 1; |
c4f3b63f | 117 | static int one_hundred = 100; |
af91322e DY |
118 | #ifdef CONFIG_PRINTK |
119 | static int ten_thousand = 10000; | |
120 | #endif | |
c4f3b63f | 121 | |
9e4a5bda AR |
122 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
123 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
124 | ||
1da177e4 LT |
125 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
126 | static int maxolduid = 65535; | |
127 | static int minolduid; | |
8ad4b1fb | 128 | static int min_percpu_pagelist_fract = 8; |
1da177e4 LT |
129 | |
130 | static int ngroups_max = NGROUPS_MAX; | |
131 | ||
72c57ed5 | 132 | #ifdef CONFIG_SPARC |
17f04fbb | 133 | #include <asm/system.h> |
1da177e4 LT |
134 | #endif |
135 | ||
0871420f DM |
136 | #ifdef CONFIG_SPARC64 |
137 | extern int sysctl_tsb_ratio; | |
138 | #endif | |
139 | ||
1da177e4 LT |
140 | #ifdef __hppa__ |
141 | extern int pwrsw_enabled; | |
142 | extern int unaligned_enabled; | |
143 | #endif | |
144 | ||
347a8dc3 | 145 | #ifdef CONFIG_S390 |
1da177e4 LT |
146 | #ifdef CONFIG_MATHEMU |
147 | extern int sysctl_ieee_emulation_warnings; | |
148 | #endif | |
149 | extern int sysctl_userprocess_debug; | |
951f22d5 | 150 | extern int spin_retry; |
1da177e4 LT |
151 | #endif |
152 | ||
d2b176ed JS |
153 | #ifdef CONFIG_IA64 |
154 | extern int no_unaligned_warning; | |
88fc241f | 155 | extern int unaligned_dump_stack; |
d2b176ed JS |
156 | #endif |
157 | ||
3fff4c42 IM |
158 | extern struct ratelimit_state printk_ratelimit_state; |
159 | ||
d6f8ff73 | 160 | #ifdef CONFIG_PROC_SYSCTL |
8d65af78 | 161 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 162 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 163 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 164 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 165 | #endif |
9ec52099 | 166 | |
d8217f07 | 167 | static struct ctl_table root_table[]; |
e51b6ba0 EB |
168 | static struct ctl_table_root sysctl_table_root; |
169 | static struct ctl_table_header root_table_header = { | |
b380b0d4 | 170 | .count = 1, |
e51b6ba0 | 171 | .ctl_table = root_table, |
73455092 | 172 | .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list), |
e51b6ba0 | 173 | .root = &sysctl_table_root, |
73455092 | 174 | .set = &sysctl_table_root.default_set, |
e51b6ba0 EB |
175 | }; |
176 | static struct ctl_table_root sysctl_table_root = { | |
177 | .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list), | |
73455092 | 178 | .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry), |
e51b6ba0 | 179 | }; |
1da177e4 | 180 | |
d8217f07 EB |
181 | static struct ctl_table kern_table[]; |
182 | static struct ctl_table vm_table[]; | |
183 | static struct ctl_table fs_table[]; | |
184 | static struct ctl_table debug_table[]; | |
185 | static struct ctl_table dev_table[]; | |
186 | extern struct ctl_table random_table[]; | |
2d9048e2 | 187 | #ifdef CONFIG_INOTIFY_USER |
d8217f07 | 188 | extern struct ctl_table inotify_table[]; |
0399cb08 | 189 | #endif |
7ef9964e DL |
190 | #ifdef CONFIG_EPOLL |
191 | extern struct ctl_table epoll_table[]; | |
192 | #endif | |
1da177e4 LT |
193 | |
194 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
195 | int sysctl_legacy_va_layout; | |
196 | #endif | |
197 | ||
1da177e4 LT |
198 | /* The default sysctl tables: */ |
199 | ||
d8217f07 | 200 | static struct ctl_table root_table[] = { |
1da177e4 | 201 | { |
1da177e4 LT |
202 | .procname = "kernel", |
203 | .mode = 0555, | |
204 | .child = kern_table, | |
205 | }, | |
206 | { | |
1da177e4 LT |
207 | .procname = "vm", |
208 | .mode = 0555, | |
209 | .child = vm_table, | |
210 | }, | |
1da177e4 | 211 | { |
1da177e4 LT |
212 | .procname = "fs", |
213 | .mode = 0555, | |
214 | .child = fs_table, | |
215 | }, | |
216 | { | |
1da177e4 LT |
217 | .procname = "debug", |
218 | .mode = 0555, | |
219 | .child = debug_table, | |
220 | }, | |
221 | { | |
1da177e4 LT |
222 | .procname = "dev", |
223 | .mode = 0555, | |
224 | .child = dev_table, | |
225 | }, | |
2be7fe07 AM |
226 | /* |
227 | * NOTE: do not add new entries to this table unless you have read | |
228 | * Documentation/sysctl/ctl_unnumbered.txt | |
229 | */ | |
6fce56ec | 230 | { } |
1da177e4 LT |
231 | }; |
232 | ||
77e54a1f | 233 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
234 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
235 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
236 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
237 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
1983a922 CE |
238 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
239 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
acb4a848 CE |
240 | static int min_sched_shares_ratelimit = 100000; /* 100 usec */ |
241 | static int max_sched_shares_ratelimit = NSEC_PER_SEC; /* 1 second */ | |
77e54a1f IM |
242 | #endif |
243 | ||
d8217f07 | 244 | static struct ctl_table kern_table[] = { |
2bba22c5 | 245 | { |
2bba22c5 MG |
246 | .procname = "sched_child_runs_first", |
247 | .data = &sysctl_sched_child_runs_first, | |
248 | .maxlen = sizeof(unsigned int), | |
249 | .mode = 0644, | |
6d456111 | 250 | .proc_handler = proc_dointvec, |
2bba22c5 | 251 | }, |
77e54a1f IM |
252 | #ifdef CONFIG_SCHED_DEBUG |
253 | { | |
b2be5e96 PZ |
254 | .procname = "sched_min_granularity_ns", |
255 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
256 | .maxlen = sizeof(unsigned int), |
257 | .mode = 0644, | |
702a7c76 | 258 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
259 | .extra1 = &min_sched_granularity_ns, |
260 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 261 | }, |
21805085 | 262 | { |
21805085 PZ |
263 | .procname = "sched_latency_ns", |
264 | .data = &sysctl_sched_latency, | |
265 | .maxlen = sizeof(unsigned int), | |
266 | .mode = 0644, | |
702a7c76 | 267 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
268 | .extra1 = &min_sched_granularity_ns, |
269 | .extra2 = &max_sched_granularity_ns, | |
270 | }, | |
77e54a1f | 271 | { |
77e54a1f IM |
272 | .procname = "sched_wakeup_granularity_ns", |
273 | .data = &sysctl_sched_wakeup_granularity, | |
274 | .maxlen = sizeof(unsigned int), | |
275 | .mode = 0644, | |
702a7c76 | 276 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
277 | .extra1 = &min_wakeup_granularity_ns, |
278 | .extra2 = &max_wakeup_granularity_ns, | |
279 | }, | |
2398f2c6 | 280 | { |
2398f2c6 PZ |
281 | .procname = "sched_shares_ratelimit", |
282 | .data = &sysctl_sched_shares_ratelimit, | |
283 | .maxlen = sizeof(unsigned int), | |
284 | .mode = 0644, | |
702a7c76 | 285 | .proc_handler = sched_proc_update_handler, |
acb4a848 CE |
286 | .extra1 = &min_sched_shares_ratelimit, |
287 | .extra2 = &max_sched_shares_ratelimit, | |
2398f2c6 | 288 | }, |
1983a922 | 289 | { |
1983a922 CE |
290 | .procname = "sched_tunable_scaling", |
291 | .data = &sysctl_sched_tunable_scaling, | |
292 | .maxlen = sizeof(enum sched_tunable_scaling), | |
293 | .mode = 0644, | |
702a7c76 | 294 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
295 | .extra1 = &min_sched_tunable_scaling, |
296 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 297 | }, |
ffda12a1 | 298 | { |
ffda12a1 PZ |
299 | .procname = "sched_shares_thresh", |
300 | .data = &sysctl_sched_shares_thresh, | |
301 | .maxlen = sizeof(unsigned int), | |
302 | .mode = 0644, | |
6d456111 | 303 | .proc_handler = proc_dointvec_minmax, |
ffda12a1 PZ |
304 | .extra1 = &zero, |
305 | }, | |
da84d961 | 306 | { |
da84d961 IM |
307 | .procname = "sched_migration_cost", |
308 | .data = &sysctl_sched_migration_cost, | |
309 | .maxlen = sizeof(unsigned int), | |
310 | .mode = 0644, | |
6d456111 | 311 | .proc_handler = proc_dointvec, |
da84d961 | 312 | }, |
b82d9fdd | 313 | { |
b82d9fdd PZ |
314 | .procname = "sched_nr_migrate", |
315 | .data = &sysctl_sched_nr_migrate, | |
316 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 317 | .mode = 0644, |
6d456111 | 318 | .proc_handler = proc_dointvec, |
fa85ae24 | 319 | }, |
e9e9250b | 320 | { |
e9e9250b PZ |
321 | .procname = "sched_time_avg", |
322 | .data = &sysctl_sched_time_avg, | |
323 | .maxlen = sizeof(unsigned int), | |
324 | .mode = 0644, | |
6d456111 | 325 | .proc_handler = proc_dointvec, |
e9e9250b | 326 | }, |
cd1bb94b | 327 | { |
cd1bb94b AB |
328 | .procname = "timer_migration", |
329 | .data = &sysctl_timer_migration, | |
330 | .maxlen = sizeof(unsigned int), | |
331 | .mode = 0644, | |
6d456111 | 332 | .proc_handler = proc_dointvec_minmax, |
bfdb4d9f AB |
333 | .extra1 = &zero, |
334 | .extra2 = &one, | |
fa85ae24 | 335 | }, |
1fc84aaa | 336 | #endif |
9f0c1e56 | 337 | { |
9f0c1e56 PZ |
338 | .procname = "sched_rt_period_us", |
339 | .data = &sysctl_sched_rt_period, | |
340 | .maxlen = sizeof(unsigned int), | |
341 | .mode = 0644, | |
6d456111 | 342 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
343 | }, |
344 | { | |
9f0c1e56 PZ |
345 | .procname = "sched_rt_runtime_us", |
346 | .data = &sysctl_sched_rt_runtime, | |
347 | .maxlen = sizeof(int), | |
348 | .mode = 0644, | |
6d456111 | 349 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 350 | }, |
1799e35d | 351 | { |
1799e35d IM |
352 | .procname = "sched_compat_yield", |
353 | .data = &sysctl_sched_compat_yield, | |
354 | .maxlen = sizeof(unsigned int), | |
355 | .mode = 0644, | |
6d456111 | 356 | .proc_handler = proc_dointvec, |
1799e35d | 357 | }, |
f20786ff PZ |
358 | #ifdef CONFIG_PROVE_LOCKING |
359 | { | |
f20786ff PZ |
360 | .procname = "prove_locking", |
361 | .data = &prove_locking, | |
362 | .maxlen = sizeof(int), | |
363 | .mode = 0644, | |
6d456111 | 364 | .proc_handler = proc_dointvec, |
f20786ff PZ |
365 | }, |
366 | #endif | |
367 | #ifdef CONFIG_LOCK_STAT | |
368 | { | |
f20786ff PZ |
369 | .procname = "lock_stat", |
370 | .data = &lock_stat, | |
371 | .maxlen = sizeof(int), | |
372 | .mode = 0644, | |
6d456111 | 373 | .proc_handler = proc_dointvec, |
f20786ff | 374 | }, |
77e54a1f | 375 | #endif |
1da177e4 | 376 | { |
1da177e4 LT |
377 | .procname = "panic", |
378 | .data = &panic_timeout, | |
379 | .maxlen = sizeof(int), | |
380 | .mode = 0644, | |
6d456111 | 381 | .proc_handler = proc_dointvec, |
1da177e4 LT |
382 | }, |
383 | { | |
1da177e4 LT |
384 | .procname = "core_uses_pid", |
385 | .data = &core_uses_pid, | |
386 | .maxlen = sizeof(int), | |
387 | .mode = 0644, | |
6d456111 | 388 | .proc_handler = proc_dointvec, |
1da177e4 LT |
389 | }, |
390 | { | |
1da177e4 LT |
391 | .procname = "core_pattern", |
392 | .data = core_pattern, | |
71ce92f3 | 393 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 394 | .mode = 0644, |
6d456111 | 395 | .proc_handler = proc_dostring, |
1da177e4 | 396 | }, |
a293980c | 397 | { |
a293980c NH |
398 | .procname = "core_pipe_limit", |
399 | .data = &core_pipe_limit, | |
400 | .maxlen = sizeof(unsigned int), | |
401 | .mode = 0644, | |
6d456111 | 402 | .proc_handler = proc_dointvec, |
a293980c | 403 | }, |
34f5a398 | 404 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 405 | { |
1da177e4 | 406 | .procname = "tainted", |
25ddbb18 | 407 | .maxlen = sizeof(long), |
34f5a398 | 408 | .mode = 0644, |
6d456111 | 409 | .proc_handler = proc_taint, |
1da177e4 | 410 | }, |
34f5a398 | 411 | #endif |
9745512c AV |
412 | #ifdef CONFIG_LATENCYTOP |
413 | { | |
414 | .procname = "latencytop", | |
415 | .data = &latencytop_enabled, | |
416 | .maxlen = sizeof(int), | |
417 | .mode = 0644, | |
6d456111 | 418 | .proc_handler = proc_dointvec, |
9745512c AV |
419 | }, |
420 | #endif | |
1da177e4 LT |
421 | #ifdef CONFIG_BLK_DEV_INITRD |
422 | { | |
1da177e4 LT |
423 | .procname = "real-root-dev", |
424 | .data = &real_root_dev, | |
425 | .maxlen = sizeof(int), | |
426 | .mode = 0644, | |
6d456111 | 427 | .proc_handler = proc_dointvec, |
1da177e4 LT |
428 | }, |
429 | #endif | |
45807a1d | 430 | { |
45807a1d IM |
431 | .procname = "print-fatal-signals", |
432 | .data = &print_fatal_signals, | |
433 | .maxlen = sizeof(int), | |
434 | .mode = 0644, | |
6d456111 | 435 | .proc_handler = proc_dointvec, |
45807a1d | 436 | }, |
72c57ed5 | 437 | #ifdef CONFIG_SPARC |
1da177e4 | 438 | { |
1da177e4 LT |
439 | .procname = "reboot-cmd", |
440 | .data = reboot_command, | |
441 | .maxlen = 256, | |
442 | .mode = 0644, | |
6d456111 | 443 | .proc_handler = proc_dostring, |
1da177e4 LT |
444 | }, |
445 | { | |
1da177e4 LT |
446 | .procname = "stop-a", |
447 | .data = &stop_a_enabled, | |
448 | .maxlen = sizeof (int), | |
449 | .mode = 0644, | |
6d456111 | 450 | .proc_handler = proc_dointvec, |
1da177e4 LT |
451 | }, |
452 | { | |
1da177e4 LT |
453 | .procname = "scons-poweroff", |
454 | .data = &scons_pwroff, | |
455 | .maxlen = sizeof (int), | |
456 | .mode = 0644, | |
6d456111 | 457 | .proc_handler = proc_dointvec, |
1da177e4 LT |
458 | }, |
459 | #endif | |
0871420f DM |
460 | #ifdef CONFIG_SPARC64 |
461 | { | |
0871420f DM |
462 | .procname = "tsb-ratio", |
463 | .data = &sysctl_tsb_ratio, | |
464 | .maxlen = sizeof (int), | |
465 | .mode = 0644, | |
6d456111 | 466 | .proc_handler = proc_dointvec, |
0871420f DM |
467 | }, |
468 | #endif | |
1da177e4 LT |
469 | #ifdef __hppa__ |
470 | { | |
1da177e4 LT |
471 | .procname = "soft-power", |
472 | .data = &pwrsw_enabled, | |
473 | .maxlen = sizeof (int), | |
474 | .mode = 0644, | |
6d456111 | 475 | .proc_handler = proc_dointvec, |
1da177e4 LT |
476 | }, |
477 | { | |
1da177e4 LT |
478 | .procname = "unaligned-trap", |
479 | .data = &unaligned_enabled, | |
480 | .maxlen = sizeof (int), | |
481 | .mode = 0644, | |
6d456111 | 482 | .proc_handler = proc_dointvec, |
1da177e4 LT |
483 | }, |
484 | #endif | |
485 | { | |
1da177e4 LT |
486 | .procname = "ctrl-alt-del", |
487 | .data = &C_A_D, | |
488 | .maxlen = sizeof(int), | |
489 | .mode = 0644, | |
6d456111 | 490 | .proc_handler = proc_dointvec, |
1da177e4 | 491 | }, |
606576ce | 492 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 493 | { |
b0fc494f SR |
494 | .procname = "ftrace_enabled", |
495 | .data = &ftrace_enabled, | |
496 | .maxlen = sizeof(int), | |
497 | .mode = 0644, | |
6d456111 | 498 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
499 | }, |
500 | #endif | |
f38f1d2a SR |
501 | #ifdef CONFIG_STACK_TRACER |
502 | { | |
f38f1d2a SR |
503 | .procname = "stack_tracer_enabled", |
504 | .data = &stack_tracer_enabled, | |
505 | .maxlen = sizeof(int), | |
506 | .mode = 0644, | |
6d456111 | 507 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
508 | }, |
509 | #endif | |
944ac425 SR |
510 | #ifdef CONFIG_TRACING |
511 | { | |
3299b4dd | 512 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
513 | .data = &ftrace_dump_on_oops, |
514 | .maxlen = sizeof(int), | |
515 | .mode = 0644, | |
6d456111 | 516 | .proc_handler = proc_dointvec, |
944ac425 SR |
517 | }, |
518 | #endif | |
a1ef5adb | 519 | #ifdef CONFIG_MODULES |
1da177e4 | 520 | { |
1da177e4 LT |
521 | .procname = "modprobe", |
522 | .data = &modprobe_path, | |
523 | .maxlen = KMOD_PATH_LEN, | |
524 | .mode = 0644, | |
6d456111 | 525 | .proc_handler = proc_dostring, |
1da177e4 | 526 | }, |
3d43321b | 527 | { |
3d43321b KC |
528 | .procname = "modules_disabled", |
529 | .data = &modules_disabled, | |
530 | .maxlen = sizeof(int), | |
531 | .mode = 0644, | |
532 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 533 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
534 | .extra1 = &one, |
535 | .extra2 = &one, | |
536 | }, | |
1da177e4 | 537 | #endif |
57ae2508 | 538 | #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET) |
1da177e4 | 539 | { |
1da177e4 | 540 | .procname = "hotplug", |
312c004d KS |
541 | .data = &uevent_helper, |
542 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 543 | .mode = 0644, |
6d456111 | 544 | .proc_handler = proc_dostring, |
1da177e4 LT |
545 | }, |
546 | #endif | |
547 | #ifdef CONFIG_CHR_DEV_SG | |
548 | { | |
1da177e4 LT |
549 | .procname = "sg-big-buff", |
550 | .data = &sg_big_buff, | |
551 | .maxlen = sizeof (int), | |
552 | .mode = 0444, | |
6d456111 | 553 | .proc_handler = proc_dointvec, |
1da177e4 LT |
554 | }, |
555 | #endif | |
556 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
557 | { | |
1da177e4 LT |
558 | .procname = "acct", |
559 | .data = &acct_parm, | |
560 | .maxlen = 3*sizeof(int), | |
561 | .mode = 0644, | |
6d456111 | 562 | .proc_handler = proc_dointvec, |
1da177e4 LT |
563 | }, |
564 | #endif | |
1da177e4 LT |
565 | #ifdef CONFIG_MAGIC_SYSRQ |
566 | { | |
1da177e4 | 567 | .procname = "sysrq", |
5d6f647f | 568 | .data = &__sysrq_enabled, |
1da177e4 LT |
569 | .maxlen = sizeof (int), |
570 | .mode = 0644, | |
6d456111 | 571 | .proc_handler = proc_dointvec, |
1da177e4 LT |
572 | }, |
573 | #endif | |
d6f8ff73 | 574 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 575 | { |
1da177e4 | 576 | .procname = "cad_pid", |
9ec52099 | 577 | .data = NULL, |
1da177e4 LT |
578 | .maxlen = sizeof (int), |
579 | .mode = 0600, | |
6d456111 | 580 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 581 | }, |
d6f8ff73 | 582 | #endif |
1da177e4 | 583 | { |
1da177e4 LT |
584 | .procname = "threads-max", |
585 | .data = &max_threads, | |
586 | .maxlen = sizeof(int), | |
587 | .mode = 0644, | |
6d456111 | 588 | .proc_handler = proc_dointvec, |
1da177e4 LT |
589 | }, |
590 | { | |
1da177e4 LT |
591 | .procname = "random", |
592 | .mode = 0555, | |
593 | .child = random_table, | |
594 | }, | |
1da177e4 | 595 | { |
1da177e4 LT |
596 | .procname = "overflowuid", |
597 | .data = &overflowuid, | |
598 | .maxlen = sizeof(int), | |
599 | .mode = 0644, | |
6d456111 | 600 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
601 | .extra1 = &minolduid, |
602 | .extra2 = &maxolduid, | |
603 | }, | |
604 | { | |
1da177e4 LT |
605 | .procname = "overflowgid", |
606 | .data = &overflowgid, | |
607 | .maxlen = sizeof(int), | |
608 | .mode = 0644, | |
6d456111 | 609 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
610 | .extra1 = &minolduid, |
611 | .extra2 = &maxolduid, | |
612 | }, | |
347a8dc3 | 613 | #ifdef CONFIG_S390 |
1da177e4 LT |
614 | #ifdef CONFIG_MATHEMU |
615 | { | |
1da177e4 LT |
616 | .procname = "ieee_emulation_warnings", |
617 | .data = &sysctl_ieee_emulation_warnings, | |
618 | .maxlen = sizeof(int), | |
619 | .mode = 0644, | |
6d456111 | 620 | .proc_handler = proc_dointvec, |
1da177e4 | 621 | }, |
1da177e4 LT |
622 | #endif |
623 | { | |
1da177e4 LT |
624 | .procname = "userprocess_debug", |
625 | .data = &sysctl_userprocess_debug, | |
626 | .maxlen = sizeof(int), | |
627 | .mode = 0644, | |
6d456111 | 628 | .proc_handler = proc_dointvec, |
1da177e4 LT |
629 | }, |
630 | #endif | |
631 | { | |
1da177e4 LT |
632 | .procname = "pid_max", |
633 | .data = &pid_max, | |
634 | .maxlen = sizeof (int), | |
635 | .mode = 0644, | |
6d456111 | 636 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
637 | .extra1 = &pid_max_min, |
638 | .extra2 = &pid_max_max, | |
639 | }, | |
640 | { | |
1da177e4 LT |
641 | .procname = "panic_on_oops", |
642 | .data = &panic_on_oops, | |
643 | .maxlen = sizeof(int), | |
644 | .mode = 0644, | |
6d456111 | 645 | .proc_handler = proc_dointvec, |
1da177e4 | 646 | }, |
7ef3d2fd JP |
647 | #if defined CONFIG_PRINTK |
648 | { | |
7ef3d2fd JP |
649 | .procname = "printk", |
650 | .data = &console_loglevel, | |
651 | .maxlen = 4*sizeof(int), | |
652 | .mode = 0644, | |
6d456111 | 653 | .proc_handler = proc_dointvec, |
7ef3d2fd | 654 | }, |
1da177e4 | 655 | { |
1da177e4 | 656 | .procname = "printk_ratelimit", |
717115e1 | 657 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
658 | .maxlen = sizeof(int), |
659 | .mode = 0644, | |
6d456111 | 660 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
661 | }, |
662 | { | |
1da177e4 | 663 | .procname = "printk_ratelimit_burst", |
717115e1 | 664 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
665 | .maxlen = sizeof(int), |
666 | .mode = 0644, | |
6d456111 | 667 | .proc_handler = proc_dointvec, |
1da177e4 | 668 | }, |
af91322e | 669 | { |
af91322e DY |
670 | .procname = "printk_delay", |
671 | .data = &printk_delay_msec, | |
672 | .maxlen = sizeof(int), | |
673 | .mode = 0644, | |
6d456111 | 674 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
675 | .extra1 = &zero, |
676 | .extra2 = &ten_thousand, | |
677 | }, | |
7ef3d2fd | 678 | #endif |
1da177e4 | 679 | { |
1da177e4 LT |
680 | .procname = "ngroups_max", |
681 | .data = &ngroups_max, | |
682 | .maxlen = sizeof (int), | |
683 | .mode = 0444, | |
6d456111 | 684 | .proc_handler = proc_dointvec, |
1da177e4 LT |
685 | }, |
686 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
687 | { | |
1da177e4 LT |
688 | .procname = "unknown_nmi_panic", |
689 | .data = &unknown_nmi_panic, | |
690 | .maxlen = sizeof (int), | |
691 | .mode = 0644, | |
6d456111 | 692 | .proc_handler = proc_dointvec, |
1da177e4 | 693 | }, |
407984f1 | 694 | { |
407984f1 DZ |
695 | .procname = "nmi_watchdog", |
696 | .data = &nmi_watchdog_enabled, | |
697 | .maxlen = sizeof (int), | |
698 | .mode = 0644, | |
6d456111 | 699 | .proc_handler = proc_nmi_enabled, |
1da177e4 LT |
700 | }, |
701 | #endif | |
702 | #if defined(CONFIG_X86) | |
8da5adda | 703 | { |
8da5adda DZ |
704 | .procname = "panic_on_unrecovered_nmi", |
705 | .data = &panic_on_unrecovered_nmi, | |
706 | .maxlen = sizeof(int), | |
707 | .mode = 0644, | |
6d456111 | 708 | .proc_handler = proc_dointvec, |
8da5adda | 709 | }, |
5211a242 | 710 | { |
5211a242 KG |
711 | .procname = "panic_on_io_nmi", |
712 | .data = &panic_on_io_nmi, | |
713 | .maxlen = sizeof(int), | |
714 | .mode = 0644, | |
6d456111 | 715 | .proc_handler = proc_dointvec, |
5211a242 | 716 | }, |
1da177e4 | 717 | { |
1da177e4 LT |
718 | .procname = "bootloader_type", |
719 | .data = &bootloader_type, | |
720 | .maxlen = sizeof (int), | |
721 | .mode = 0444, | |
6d456111 | 722 | .proc_handler = proc_dointvec, |
1da177e4 | 723 | }, |
5031296c | 724 | { |
5031296c PA |
725 | .procname = "bootloader_version", |
726 | .data = &bootloader_version, | |
727 | .maxlen = sizeof (int), | |
728 | .mode = 0444, | |
6d456111 | 729 | .proc_handler = proc_dointvec, |
5031296c | 730 | }, |
0741f4d2 | 731 | { |
0741f4d2 CE |
732 | .procname = "kstack_depth_to_print", |
733 | .data = &kstack_depth_to_print, | |
734 | .maxlen = sizeof(int), | |
735 | .mode = 0644, | |
6d456111 | 736 | .proc_handler = proc_dointvec, |
0741f4d2 | 737 | }, |
6e7c4025 | 738 | { |
6e7c4025 IM |
739 | .procname = "io_delay_type", |
740 | .data = &io_delay_type, | |
741 | .maxlen = sizeof(int), | |
742 | .mode = 0644, | |
6d456111 | 743 | .proc_handler = proc_dointvec, |
6e7c4025 | 744 | }, |
1da177e4 | 745 | #endif |
7a9166e3 | 746 | #if defined(CONFIG_MMU) |
1da177e4 | 747 | { |
1da177e4 LT |
748 | .procname = "randomize_va_space", |
749 | .data = &randomize_va_space, | |
750 | .maxlen = sizeof(int), | |
751 | .mode = 0644, | |
6d456111 | 752 | .proc_handler = proc_dointvec, |
1da177e4 | 753 | }, |
7a9166e3 | 754 | #endif |
0152fb37 | 755 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 756 | { |
951f22d5 MS |
757 | .procname = "spin_retry", |
758 | .data = &spin_retry, | |
759 | .maxlen = sizeof (int), | |
760 | .mode = 0644, | |
6d456111 | 761 | .proc_handler = proc_dointvec, |
951f22d5 | 762 | }, |
c255d844 | 763 | #endif |
673d5b43 | 764 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 765 | { |
c255d844 | 766 | .procname = "acpi_video_flags", |
77afcf78 | 767 | .data = &acpi_realmode_flags, |
c255d844 PM |
768 | .maxlen = sizeof (unsigned long), |
769 | .mode = 0644, | |
6d456111 | 770 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 771 | }, |
d2b176ed JS |
772 | #endif |
773 | #ifdef CONFIG_IA64 | |
774 | { | |
d2b176ed JS |
775 | .procname = "ignore-unaligned-usertrap", |
776 | .data = &no_unaligned_warning, | |
777 | .maxlen = sizeof (int), | |
778 | .mode = 0644, | |
6d456111 | 779 | .proc_handler = proc_dointvec, |
d2b176ed | 780 | }, |
88fc241f | 781 | { |
88fc241f DC |
782 | .procname = "unaligned-dump-stack", |
783 | .data = &unaligned_dump_stack, | |
784 | .maxlen = sizeof (int), | |
785 | .mode = 0644, | |
6d456111 | 786 | .proc_handler = proc_dointvec, |
88fc241f | 787 | }, |
bebfa101 | 788 | #endif |
c4f3b63f | 789 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
9c44bc03 | 790 | { |
9c44bc03 IM |
791 | .procname = "softlockup_panic", |
792 | .data = &softlockup_panic, | |
793 | .maxlen = sizeof(int), | |
794 | .mode = 0644, | |
6d456111 | 795 | .proc_handler = proc_dointvec_minmax, |
9c44bc03 IM |
796 | .extra1 = &zero, |
797 | .extra2 = &one, | |
798 | }, | |
c4f3b63f | 799 | { |
c4f3b63f RT |
800 | .procname = "softlockup_thresh", |
801 | .data = &softlockup_thresh, | |
9383d967 | 802 | .maxlen = sizeof(int), |
c4f3b63f | 803 | .mode = 0644, |
6d456111 | 804 | .proc_handler = proc_dosoftlockup_thresh, |
9383d967 | 805 | .extra1 = &neg_one, |
c4f3b63f RT |
806 | .extra2 = &sixty, |
807 | }, | |
e162b39a MSB |
808 | #endif |
809 | #ifdef CONFIG_DETECT_HUNG_TASK | |
810 | { | |
e162b39a MSB |
811 | .procname = "hung_task_panic", |
812 | .data = &sysctl_hung_task_panic, | |
813 | .maxlen = sizeof(int), | |
814 | .mode = 0644, | |
6d456111 | 815 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
816 | .extra1 = &zero, |
817 | .extra2 = &one, | |
818 | }, | |
82a1fcb9 | 819 | { |
82a1fcb9 IM |
820 | .procname = "hung_task_check_count", |
821 | .data = &sysctl_hung_task_check_count, | |
90739081 | 822 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 823 | .mode = 0644, |
6d456111 | 824 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 IM |
825 | }, |
826 | { | |
82a1fcb9 IM |
827 | .procname = "hung_task_timeout_secs", |
828 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 829 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 830 | .mode = 0644, |
6d456111 | 831 | .proc_handler = proc_dohung_task_timeout_secs, |
82a1fcb9 IM |
832 | }, |
833 | { | |
82a1fcb9 IM |
834 | .procname = "hung_task_warnings", |
835 | .data = &sysctl_hung_task_warnings, | |
90739081 | 836 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 837 | .mode = 0644, |
6d456111 | 838 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 | 839 | }, |
c4f3b63f | 840 | #endif |
bebfa101 AK |
841 | #ifdef CONFIG_COMPAT |
842 | { | |
bebfa101 AK |
843 | .procname = "compat-log", |
844 | .data = &compat_log, | |
845 | .maxlen = sizeof (int), | |
846 | .mode = 0644, | |
6d456111 | 847 | .proc_handler = proc_dointvec, |
bebfa101 | 848 | }, |
951f22d5 | 849 | #endif |
23f78d4a IM |
850 | #ifdef CONFIG_RT_MUTEXES |
851 | { | |
23f78d4a IM |
852 | .procname = "max_lock_depth", |
853 | .data = &max_lock_depth, | |
854 | .maxlen = sizeof(int), | |
855 | .mode = 0644, | |
6d456111 | 856 | .proc_handler = proc_dointvec, |
23f78d4a | 857 | }, |
5096add8 | 858 | #endif |
10a0a8d4 | 859 | { |
10a0a8d4 JF |
860 | .procname = "poweroff_cmd", |
861 | .data = &poweroff_cmd, | |
862 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
863 | .mode = 0644, | |
6d456111 | 864 | .proc_handler = proc_dostring, |
10a0a8d4 | 865 | }, |
0b77f5bf DH |
866 | #ifdef CONFIG_KEYS |
867 | { | |
0b77f5bf DH |
868 | .procname = "keys", |
869 | .mode = 0555, | |
870 | .child = key_sysctls, | |
871 | }, | |
872 | #endif | |
31a72bce PM |
873 | #ifdef CONFIG_RCU_TORTURE_TEST |
874 | { | |
31a72bce PM |
875 | .procname = "rcutorture_runnable", |
876 | .data = &rcutorture_runnable, | |
877 | .maxlen = sizeof(int), | |
878 | .mode = 0644, | |
6d456111 | 879 | .proc_handler = proc_dointvec, |
31a72bce PM |
880 | }, |
881 | #endif | |
12e22c5e DH |
882 | #ifdef CONFIG_SLOW_WORK |
883 | { | |
12e22c5e DH |
884 | .procname = "slow-work", |
885 | .mode = 0555, | |
886 | .child = slow_work_sysctls, | |
887 | }, | |
888 | #endif | |
cdd6c482 | 889 | #ifdef CONFIG_PERF_EVENTS |
1ccd1549 | 890 | { |
cdd6c482 IM |
891 | .procname = "perf_event_paranoid", |
892 | .data = &sysctl_perf_event_paranoid, | |
893 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 894 | .mode = 0644, |
6d456111 | 895 | .proc_handler = proc_dointvec, |
1ccd1549 | 896 | }, |
c5078f78 | 897 | { |
cdd6c482 IM |
898 | .procname = "perf_event_mlock_kb", |
899 | .data = &sysctl_perf_event_mlock, | |
900 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 901 | .mode = 0644, |
6d456111 | 902 | .proc_handler = proc_dointvec, |
c5078f78 | 903 | }, |
a78ac325 | 904 | { |
cdd6c482 IM |
905 | .procname = "perf_event_max_sample_rate", |
906 | .data = &sysctl_perf_event_sample_rate, | |
907 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 908 | .mode = 0644, |
6d456111 | 909 | .proc_handler = proc_dointvec, |
a78ac325 | 910 | }, |
1ccd1549 | 911 | #endif |
dfec072e VN |
912 | #ifdef CONFIG_KMEMCHECK |
913 | { | |
dfec072e VN |
914 | .procname = "kmemcheck", |
915 | .data = &kmemcheck_enabled, | |
916 | .maxlen = sizeof(int), | |
917 | .mode = 0644, | |
6d456111 | 918 | .proc_handler = proc_dointvec, |
dfec072e VN |
919 | }, |
920 | #endif | |
cb684b5b | 921 | #ifdef CONFIG_BLOCK |
5e605b64 | 922 | { |
5e605b64 JA |
923 | .procname = "blk_iopoll", |
924 | .data = &blk_iopoll_enabled, | |
925 | .maxlen = sizeof(int), | |
926 | .mode = 0644, | |
6d456111 | 927 | .proc_handler = proc_dointvec, |
5e605b64 | 928 | }, |
cb684b5b | 929 | #endif |
ed2c12f3 AM |
930 | /* |
931 | * NOTE: do not add new entries to this table unless you have read | |
932 | * Documentation/sysctl/ctl_unnumbered.txt | |
933 | */ | |
6fce56ec | 934 | { } |
1da177e4 LT |
935 | }; |
936 | ||
d8217f07 | 937 | static struct ctl_table vm_table[] = { |
1da177e4 | 938 | { |
1da177e4 LT |
939 | .procname = "overcommit_memory", |
940 | .data = &sysctl_overcommit_memory, | |
941 | .maxlen = sizeof(sysctl_overcommit_memory), | |
942 | .mode = 0644, | |
6d456111 | 943 | .proc_handler = proc_dointvec, |
1da177e4 | 944 | }, |
fadd8fbd | 945 | { |
fadd8fbd KH |
946 | .procname = "panic_on_oom", |
947 | .data = &sysctl_panic_on_oom, | |
948 | .maxlen = sizeof(sysctl_panic_on_oom), | |
949 | .mode = 0644, | |
6d456111 | 950 | .proc_handler = proc_dointvec, |
fadd8fbd | 951 | }, |
fe071d7e | 952 | { |
fe071d7e DR |
953 | .procname = "oom_kill_allocating_task", |
954 | .data = &sysctl_oom_kill_allocating_task, | |
955 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
956 | .mode = 0644, | |
6d456111 | 957 | .proc_handler = proc_dointvec, |
fe071d7e | 958 | }, |
fef1bdd6 | 959 | { |
fef1bdd6 DR |
960 | .procname = "oom_dump_tasks", |
961 | .data = &sysctl_oom_dump_tasks, | |
962 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
963 | .mode = 0644, | |
6d456111 | 964 | .proc_handler = proc_dointvec, |
fef1bdd6 | 965 | }, |
1da177e4 | 966 | { |
1da177e4 LT |
967 | .procname = "overcommit_ratio", |
968 | .data = &sysctl_overcommit_ratio, | |
969 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
970 | .mode = 0644, | |
6d456111 | 971 | .proc_handler = proc_dointvec, |
1da177e4 LT |
972 | }, |
973 | { | |
1da177e4 LT |
974 | .procname = "page-cluster", |
975 | .data = &page_cluster, | |
976 | .maxlen = sizeof(int), | |
977 | .mode = 0644, | |
6d456111 | 978 | .proc_handler = proc_dointvec, |
1da177e4 LT |
979 | }, |
980 | { | |
1da177e4 LT |
981 | .procname = "dirty_background_ratio", |
982 | .data = &dirty_background_ratio, | |
983 | .maxlen = sizeof(dirty_background_ratio), | |
984 | .mode = 0644, | |
6d456111 | 985 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
986 | .extra1 = &zero, |
987 | .extra2 = &one_hundred, | |
988 | }, | |
2da02997 | 989 | { |
2da02997 DR |
990 | .procname = "dirty_background_bytes", |
991 | .data = &dirty_background_bytes, | |
992 | .maxlen = sizeof(dirty_background_bytes), | |
993 | .mode = 0644, | |
6d456111 | 994 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 995 | .extra1 = &one_ul, |
2da02997 | 996 | }, |
1da177e4 | 997 | { |
1da177e4 LT |
998 | .procname = "dirty_ratio", |
999 | .data = &vm_dirty_ratio, | |
1000 | .maxlen = sizeof(vm_dirty_ratio), | |
1001 | .mode = 0644, | |
6d456111 | 1002 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1003 | .extra1 = &zero, |
1004 | .extra2 = &one_hundred, | |
1005 | }, | |
2da02997 | 1006 | { |
2da02997 DR |
1007 | .procname = "dirty_bytes", |
1008 | .data = &vm_dirty_bytes, | |
1009 | .maxlen = sizeof(vm_dirty_bytes), | |
1010 | .mode = 0644, | |
6d456111 | 1011 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1012 | .extra1 = &dirty_bytes_min, |
2da02997 | 1013 | }, |
1da177e4 | 1014 | { |
1da177e4 | 1015 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1016 | .data = &dirty_writeback_interval, |
1017 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1018 | .mode = 0644, |
6d456111 | 1019 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1020 | }, |
1021 | { | |
1da177e4 | 1022 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1023 | .data = &dirty_expire_interval, |
1024 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1025 | .mode = 0644, |
6d456111 | 1026 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1027 | }, |
1028 | { | |
1da177e4 LT |
1029 | .procname = "nr_pdflush_threads", |
1030 | .data = &nr_pdflush_threads, | |
1031 | .maxlen = sizeof nr_pdflush_threads, | |
1032 | .mode = 0444 /* read-only*/, | |
6d456111 | 1033 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1034 | }, |
1035 | { | |
1da177e4 LT |
1036 | .procname = "swappiness", |
1037 | .data = &vm_swappiness, | |
1038 | .maxlen = sizeof(vm_swappiness), | |
1039 | .mode = 0644, | |
6d456111 | 1040 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1041 | .extra1 = &zero, |
1042 | .extra2 = &one_hundred, | |
1043 | }, | |
1044 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1045 | { |
1da177e4 | 1046 | .procname = "nr_hugepages", |
e5ff2159 | 1047 | .data = NULL, |
1da177e4 LT |
1048 | .maxlen = sizeof(unsigned long), |
1049 | .mode = 0644, | |
6d456111 | 1050 | .proc_handler = hugetlb_sysctl_handler, |
1da177e4 LT |
1051 | .extra1 = (void *)&hugetlb_zero, |
1052 | .extra2 = (void *)&hugetlb_infinity, | |
06808b08 LS |
1053 | }, |
1054 | #ifdef CONFIG_NUMA | |
1055 | { | |
1056 | .procname = "nr_hugepages_mempolicy", | |
1057 | .data = NULL, | |
1058 | .maxlen = sizeof(unsigned long), | |
1059 | .mode = 0644, | |
1060 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
1061 | .extra1 = (void *)&hugetlb_zero, | |
1062 | .extra2 = (void *)&hugetlb_infinity, | |
1063 | }, | |
1064 | #endif | |
1da177e4 | 1065 | { |
1da177e4 LT |
1066 | .procname = "hugetlb_shm_group", |
1067 | .data = &sysctl_hugetlb_shm_group, | |
1068 | .maxlen = sizeof(gid_t), | |
1069 | .mode = 0644, | |
6d456111 | 1070 | .proc_handler = proc_dointvec, |
1da177e4 | 1071 | }, |
396faf03 | 1072 | { |
396faf03 MG |
1073 | .procname = "hugepages_treat_as_movable", |
1074 | .data = &hugepages_treat_as_movable, | |
1075 | .maxlen = sizeof(int), | |
1076 | .mode = 0644, | |
6d456111 | 1077 | .proc_handler = hugetlb_treat_movable_handler, |
396faf03 | 1078 | }, |
d1c3fb1f | 1079 | { |
d1c3fb1f | 1080 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1081 | .data = NULL, |
1082 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1083 | .mode = 0644, |
6d456111 | 1084 | .proc_handler = hugetlb_overcommit_handler, |
e5ff2159 AK |
1085 | .extra1 = (void *)&hugetlb_zero, |
1086 | .extra2 = (void *)&hugetlb_infinity, | |
d1c3fb1f | 1087 | }, |
1da177e4 LT |
1088 | #endif |
1089 | { | |
1da177e4 LT |
1090 | .procname = "lowmem_reserve_ratio", |
1091 | .data = &sysctl_lowmem_reserve_ratio, | |
1092 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1093 | .mode = 0644, | |
6d456111 | 1094 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1095 | }, |
9d0243bc | 1096 | { |
9d0243bc AM |
1097 | .procname = "drop_caches", |
1098 | .data = &sysctl_drop_caches, | |
1099 | .maxlen = sizeof(int), | |
1100 | .mode = 0644, | |
1101 | .proc_handler = drop_caches_sysctl_handler, | |
9d0243bc | 1102 | }, |
1da177e4 | 1103 | { |
1da177e4 LT |
1104 | .procname = "min_free_kbytes", |
1105 | .data = &min_free_kbytes, | |
1106 | .maxlen = sizeof(min_free_kbytes), | |
1107 | .mode = 0644, | |
6d456111 | 1108 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1109 | .extra1 = &zero, |
1110 | }, | |
8ad4b1fb | 1111 | { |
8ad4b1fb RS |
1112 | .procname = "percpu_pagelist_fraction", |
1113 | .data = &percpu_pagelist_fraction, | |
1114 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1115 | .mode = 0644, | |
6d456111 | 1116 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
8ad4b1fb RS |
1117 | .extra1 = &min_percpu_pagelist_fract, |
1118 | }, | |
1da177e4 LT |
1119 | #ifdef CONFIG_MMU |
1120 | { | |
1da177e4 LT |
1121 | .procname = "max_map_count", |
1122 | .data = &sysctl_max_map_count, | |
1123 | .maxlen = sizeof(sysctl_max_map_count), | |
1124 | .mode = 0644, | |
3e26120c | 1125 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1126 | .extra1 = &zero, |
1da177e4 | 1127 | }, |
dd8632a1 PM |
1128 | #else |
1129 | { | |
dd8632a1 PM |
1130 | .procname = "nr_trim_pages", |
1131 | .data = &sysctl_nr_trim_pages, | |
1132 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1133 | .mode = 0644, | |
6d456111 | 1134 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1135 | .extra1 = &zero, |
1136 | }, | |
1da177e4 LT |
1137 | #endif |
1138 | { | |
1da177e4 LT |
1139 | .procname = "laptop_mode", |
1140 | .data = &laptop_mode, | |
1141 | .maxlen = sizeof(laptop_mode), | |
1142 | .mode = 0644, | |
6d456111 | 1143 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1144 | }, |
1145 | { | |
1da177e4 LT |
1146 | .procname = "block_dump", |
1147 | .data = &block_dump, | |
1148 | .maxlen = sizeof(block_dump), | |
1149 | .mode = 0644, | |
6d456111 | 1150 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1151 | .extra1 = &zero, |
1152 | }, | |
1153 | { | |
1da177e4 LT |
1154 | .procname = "vfs_cache_pressure", |
1155 | .data = &sysctl_vfs_cache_pressure, | |
1156 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1157 | .mode = 0644, | |
6d456111 | 1158 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1159 | .extra1 = &zero, |
1160 | }, | |
1161 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1162 | { | |
1da177e4 LT |
1163 | .procname = "legacy_va_layout", |
1164 | .data = &sysctl_legacy_va_layout, | |
1165 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1166 | .mode = 0644, | |
6d456111 | 1167 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1168 | .extra1 = &zero, |
1169 | }, | |
1170 | #endif | |
1743660b CL |
1171 | #ifdef CONFIG_NUMA |
1172 | { | |
1743660b CL |
1173 | .procname = "zone_reclaim_mode", |
1174 | .data = &zone_reclaim_mode, | |
1175 | .maxlen = sizeof(zone_reclaim_mode), | |
1176 | .mode = 0644, | |
6d456111 | 1177 | .proc_handler = proc_dointvec, |
c84db23c | 1178 | .extra1 = &zero, |
1743660b | 1179 | }, |
9614634f | 1180 | { |
9614634f CL |
1181 | .procname = "min_unmapped_ratio", |
1182 | .data = &sysctl_min_unmapped_ratio, | |
1183 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1184 | .mode = 0644, | |
6d456111 | 1185 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1186 | .extra1 = &zero, |
1187 | .extra2 = &one_hundred, | |
1188 | }, | |
0ff38490 | 1189 | { |
0ff38490 CL |
1190 | .procname = "min_slab_ratio", |
1191 | .data = &sysctl_min_slab_ratio, | |
1192 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1193 | .mode = 0644, | |
6d456111 | 1194 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1195 | .extra1 = &zero, |
1196 | .extra2 = &one_hundred, | |
1197 | }, | |
e6e5494c | 1198 | #endif |
77461ab3 CL |
1199 | #ifdef CONFIG_SMP |
1200 | { | |
77461ab3 CL |
1201 | .procname = "stat_interval", |
1202 | .data = &sysctl_stat_interval, | |
1203 | .maxlen = sizeof(sysctl_stat_interval), | |
1204 | .mode = 0644, | |
6d456111 | 1205 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1206 | }, |
1207 | #endif | |
6e141546 | 1208 | #ifdef CONFIG_MMU |
ed032189 | 1209 | { |
ed032189 | 1210 | .procname = "mmap_min_addr", |
788084ab EP |
1211 | .data = &dac_mmap_min_addr, |
1212 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1213 | .mode = 0644, |
6d456111 | 1214 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1215 | }, |
6e141546 | 1216 | #endif |
f0c0b2b8 KH |
1217 | #ifdef CONFIG_NUMA |
1218 | { | |
f0c0b2b8 KH |
1219 | .procname = "numa_zonelist_order", |
1220 | .data = &numa_zonelist_order, | |
1221 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1222 | .mode = 0644, | |
6d456111 | 1223 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1224 | }, |
1225 | #endif | |
2b8232ce | 1226 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1227 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1228 | { |
e6e5494c IM |
1229 | .procname = "vdso_enabled", |
1230 | .data = &vdso_enabled, | |
1231 | .maxlen = sizeof(vdso_enabled), | |
1232 | .mode = 0644, | |
6d456111 | 1233 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1234 | .extra1 = &zero, |
1235 | }, | |
1da177e4 | 1236 | #endif |
195cf453 BG |
1237 | #ifdef CONFIG_HIGHMEM |
1238 | { | |
195cf453 BG |
1239 | .procname = "highmem_is_dirtyable", |
1240 | .data = &vm_highmem_is_dirtyable, | |
1241 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1242 | .mode = 0644, | |
6d456111 | 1243 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1244 | .extra1 = &zero, |
1245 | .extra2 = &one, | |
1246 | }, | |
1247 | #endif | |
4be6f6bb | 1248 | { |
4be6f6bb PZ |
1249 | .procname = "scan_unevictable_pages", |
1250 | .data = &scan_unevictable_pages, | |
1251 | .maxlen = sizeof(scan_unevictable_pages), | |
1252 | .mode = 0644, | |
6d456111 | 1253 | .proc_handler = scan_unevictable_handler, |
4be6f6bb | 1254 | }, |
6a46079c AK |
1255 | #ifdef CONFIG_MEMORY_FAILURE |
1256 | { | |
6a46079c AK |
1257 | .procname = "memory_failure_early_kill", |
1258 | .data = &sysctl_memory_failure_early_kill, | |
1259 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1260 | .mode = 0644, | |
6d456111 | 1261 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1262 | .extra1 = &zero, |
1263 | .extra2 = &one, | |
1264 | }, | |
1265 | { | |
6a46079c AK |
1266 | .procname = "memory_failure_recovery", |
1267 | .data = &sysctl_memory_failure_recovery, | |
1268 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1269 | .mode = 0644, | |
6d456111 | 1270 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1271 | .extra1 = &zero, |
1272 | .extra2 = &one, | |
1273 | }, | |
1274 | #endif | |
1275 | ||
2be7fe07 AM |
1276 | /* |
1277 | * NOTE: do not add new entries to this table unless you have read | |
1278 | * Documentation/sysctl/ctl_unnumbered.txt | |
1279 | */ | |
6fce56ec | 1280 | { } |
1da177e4 LT |
1281 | }; |
1282 | ||
2abc26fc | 1283 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1284 | static struct ctl_table binfmt_misc_table[] = { |
6fce56ec | 1285 | { } |
2abc26fc EB |
1286 | }; |
1287 | #endif | |
1288 | ||
d8217f07 | 1289 | static struct ctl_table fs_table[] = { |
1da177e4 | 1290 | { |
1da177e4 LT |
1291 | .procname = "inode-nr", |
1292 | .data = &inodes_stat, | |
1293 | .maxlen = 2*sizeof(int), | |
1294 | .mode = 0444, | |
6d456111 | 1295 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1296 | }, |
1297 | { | |
1da177e4 LT |
1298 | .procname = "inode-state", |
1299 | .data = &inodes_stat, | |
1300 | .maxlen = 7*sizeof(int), | |
1301 | .mode = 0444, | |
6d456111 | 1302 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1303 | }, |
1304 | { | |
1da177e4 LT |
1305 | .procname = "file-nr", |
1306 | .data = &files_stat, | |
1307 | .maxlen = 3*sizeof(int), | |
1308 | .mode = 0444, | |
6d456111 | 1309 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1310 | }, |
1311 | { | |
1da177e4 LT |
1312 | .procname = "file-max", |
1313 | .data = &files_stat.max_files, | |
1314 | .maxlen = sizeof(int), | |
1315 | .mode = 0644, | |
6d456111 | 1316 | .proc_handler = proc_dointvec, |
1da177e4 | 1317 | }, |
9cfe015a | 1318 | { |
9cfe015a ED |
1319 | .procname = "nr_open", |
1320 | .data = &sysctl_nr_open, | |
1321 | .maxlen = sizeof(int), | |
1322 | .mode = 0644, | |
6d456111 | 1323 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1324 | .extra1 = &sysctl_nr_open_min, |
1325 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1326 | }, |
1da177e4 | 1327 | { |
1da177e4 LT |
1328 | .procname = "dentry-state", |
1329 | .data = &dentry_stat, | |
1330 | .maxlen = 6*sizeof(int), | |
1331 | .mode = 0444, | |
6d456111 | 1332 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1333 | }, |
1334 | { | |
1da177e4 LT |
1335 | .procname = "overflowuid", |
1336 | .data = &fs_overflowuid, | |
1337 | .maxlen = sizeof(int), | |
1338 | .mode = 0644, | |
6d456111 | 1339 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1340 | .extra1 = &minolduid, |
1341 | .extra2 = &maxolduid, | |
1342 | }, | |
1343 | { | |
1da177e4 LT |
1344 | .procname = "overflowgid", |
1345 | .data = &fs_overflowgid, | |
1346 | .maxlen = sizeof(int), | |
1347 | .mode = 0644, | |
6d456111 | 1348 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1349 | .extra1 = &minolduid, |
1350 | .extra2 = &maxolduid, | |
1351 | }, | |
bfcd17a6 | 1352 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1353 | { |
1da177e4 LT |
1354 | .procname = "leases-enable", |
1355 | .data = &leases_enable, | |
1356 | .maxlen = sizeof(int), | |
1357 | .mode = 0644, | |
6d456111 | 1358 | .proc_handler = proc_dointvec, |
1da177e4 | 1359 | }, |
bfcd17a6 | 1360 | #endif |
1da177e4 LT |
1361 | #ifdef CONFIG_DNOTIFY |
1362 | { | |
1da177e4 LT |
1363 | .procname = "dir-notify-enable", |
1364 | .data = &dir_notify_enable, | |
1365 | .maxlen = sizeof(int), | |
1366 | .mode = 0644, | |
6d456111 | 1367 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1368 | }, |
1369 | #endif | |
1370 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1371 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1372 | { |
1da177e4 LT |
1373 | .procname = "lease-break-time", |
1374 | .data = &lease_break_time, | |
1375 | .maxlen = sizeof(int), | |
1376 | .mode = 0644, | |
6d456111 | 1377 | .proc_handler = proc_dointvec, |
1da177e4 | 1378 | }, |
bfcd17a6 | 1379 | #endif |
ebf3f09c | 1380 | #ifdef CONFIG_AIO |
1da177e4 | 1381 | { |
1da177e4 LT |
1382 | .procname = "aio-nr", |
1383 | .data = &aio_nr, | |
1384 | .maxlen = sizeof(aio_nr), | |
1385 | .mode = 0444, | |
6d456111 | 1386 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1387 | }, |
1388 | { | |
1da177e4 LT |
1389 | .procname = "aio-max-nr", |
1390 | .data = &aio_max_nr, | |
1391 | .maxlen = sizeof(aio_max_nr), | |
1392 | .mode = 0644, | |
6d456111 | 1393 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1394 | }, |
ebf3f09c | 1395 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1396 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1397 | { |
0399cb08 RL |
1398 | .procname = "inotify", |
1399 | .mode = 0555, | |
1400 | .child = inotify_table, | |
1401 | }, | |
1402 | #endif | |
7ef9964e DL |
1403 | #ifdef CONFIG_EPOLL |
1404 | { | |
1405 | .procname = "epoll", | |
1406 | .mode = 0555, | |
1407 | .child = epoll_table, | |
1408 | }, | |
1409 | #endif | |
1da177e4 | 1410 | #endif |
d6e71144 | 1411 | { |
d6e71144 AC |
1412 | .procname = "suid_dumpable", |
1413 | .data = &suid_dumpable, | |
1414 | .maxlen = sizeof(int), | |
1415 | .mode = 0644, | |
6d456111 | 1416 | .proc_handler = proc_dointvec_minmax, |
8e654fba MW |
1417 | .extra1 = &zero, |
1418 | .extra2 = &two, | |
d6e71144 | 1419 | }, |
2abc26fc EB |
1420 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1421 | { | |
2abc26fc EB |
1422 | .procname = "binfmt_misc", |
1423 | .mode = 0555, | |
1424 | .child = binfmt_misc_table, | |
1425 | }, | |
1426 | #endif | |
b492e95b JA |
1427 | { |
1428 | .procname = "pipe-max-pages", | |
1429 | .data = &pipe_max_pages, | |
1430 | .maxlen = sizeof(int), | |
1431 | .mode = 0644, | |
1432 | .proc_handler = &proc_dointvec_minmax, | |
1433 | .extra1 = &two, | |
1434 | }, | |
2be7fe07 AM |
1435 | /* |
1436 | * NOTE: do not add new entries to this table unless you have read | |
1437 | * Documentation/sysctl/ctl_unnumbered.txt | |
2be7fe07 | 1438 | */ |
6fce56ec | 1439 | { } |
1da177e4 LT |
1440 | }; |
1441 | ||
d8217f07 | 1442 | static struct ctl_table debug_table[] = { |
4b177647 | 1443 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) |
abd4f750 | 1444 | { |
abd4f750 MAS |
1445 | .procname = "exception-trace", |
1446 | .data = &show_unhandled_signals, | |
1447 | .maxlen = sizeof(int), | |
1448 | .mode = 0644, | |
1449 | .proc_handler = proc_dointvec | |
1450 | }, | |
b2be84df MH |
1451 | #endif |
1452 | #if defined(CONFIG_OPTPROBES) | |
1453 | { | |
1454 | .procname = "kprobes-optimization", | |
1455 | .data = &sysctl_kprobes_optimization, | |
1456 | .maxlen = sizeof(int), | |
1457 | .mode = 0644, | |
1458 | .proc_handler = proc_kprobes_optimization_handler, | |
1459 | .extra1 = &zero, | |
1460 | .extra2 = &one, | |
1461 | }, | |
abd4f750 | 1462 | #endif |
6fce56ec | 1463 | { } |
1da177e4 LT |
1464 | }; |
1465 | ||
d8217f07 | 1466 | static struct ctl_table dev_table[] = { |
6fce56ec | 1467 | { } |
0eeca283 | 1468 | }; |
1da177e4 | 1469 | |
330d57fb AV |
1470 | static DEFINE_SPINLOCK(sysctl_lock); |
1471 | ||
1472 | /* called under sysctl_lock */ | |
1473 | static int use_table(struct ctl_table_header *p) | |
1474 | { | |
1475 | if (unlikely(p->unregistering)) | |
1476 | return 0; | |
1477 | p->used++; | |
1478 | return 1; | |
1479 | } | |
1480 | ||
1481 | /* called under sysctl_lock */ | |
1482 | static void unuse_table(struct ctl_table_header *p) | |
1483 | { | |
1484 | if (!--p->used) | |
1485 | if (unlikely(p->unregistering)) | |
1486 | complete(p->unregistering); | |
1487 | } | |
1488 | ||
1489 | /* called under sysctl_lock, will reacquire if has to wait */ | |
1490 | static void start_unregistering(struct ctl_table_header *p) | |
1491 | { | |
1492 | /* | |
1493 | * if p->used is 0, nobody will ever touch that entry again; | |
1494 | * we'll eliminate all paths to it before dropping sysctl_lock | |
1495 | */ | |
1496 | if (unlikely(p->used)) { | |
1497 | struct completion wait; | |
1498 | init_completion(&wait); | |
1499 | p->unregistering = &wait; | |
1500 | spin_unlock(&sysctl_lock); | |
1501 | wait_for_completion(&wait); | |
1502 | spin_lock(&sysctl_lock); | |
f7e6ced4 AV |
1503 | } else { |
1504 | /* anything non-NULL; we'll never dereference it */ | |
1505 | p->unregistering = ERR_PTR(-EINVAL); | |
330d57fb AV |
1506 | } |
1507 | /* | |
1508 | * do not remove from the list until nobody holds it; walking the | |
1509 | * list in do_sysctl() relies on that. | |
1510 | */ | |
1511 | list_del_init(&p->ctl_entry); | |
1512 | } | |
1513 | ||
f7e6ced4 AV |
1514 | void sysctl_head_get(struct ctl_table_header *head) |
1515 | { | |
1516 | spin_lock(&sysctl_lock); | |
1517 | head->count++; | |
1518 | spin_unlock(&sysctl_lock); | |
1519 | } | |
1520 | ||
1521 | void sysctl_head_put(struct ctl_table_header *head) | |
1522 | { | |
1523 | spin_lock(&sysctl_lock); | |
1524 | if (!--head->count) | |
1525 | kfree(head); | |
1526 | spin_unlock(&sysctl_lock); | |
1527 | } | |
1528 | ||
1529 | struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head) | |
1530 | { | |
1531 | if (!head) | |
1532 | BUG(); | |
1533 | spin_lock(&sysctl_lock); | |
1534 | if (!use_table(head)) | |
1535 | head = ERR_PTR(-ENOENT); | |
1536 | spin_unlock(&sysctl_lock); | |
1537 | return head; | |
1538 | } | |
1539 | ||
805b5d5e EB |
1540 | void sysctl_head_finish(struct ctl_table_header *head) |
1541 | { | |
1542 | if (!head) | |
1543 | return; | |
1544 | spin_lock(&sysctl_lock); | |
1545 | unuse_table(head); | |
1546 | spin_unlock(&sysctl_lock); | |
1547 | } | |
1548 | ||
73455092 AV |
1549 | static struct ctl_table_set * |
1550 | lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces) | |
1551 | { | |
1552 | struct ctl_table_set *set = &root->default_set; | |
1553 | if (root->lookup) | |
1554 | set = root->lookup(root, namespaces); | |
1555 | return set; | |
1556 | } | |
1557 | ||
e51b6ba0 EB |
1558 | static struct list_head * |
1559 | lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces) | |
805b5d5e | 1560 | { |
73455092 AV |
1561 | struct ctl_table_set *set = lookup_header_set(root, namespaces); |
1562 | return &set->list; | |
e51b6ba0 EB |
1563 | } |
1564 | ||
1565 | struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces, | |
1566 | struct ctl_table_header *prev) | |
1567 | { | |
1568 | struct ctl_table_root *root; | |
1569 | struct list_head *header_list; | |
805b5d5e EB |
1570 | struct ctl_table_header *head; |
1571 | struct list_head *tmp; | |
e51b6ba0 | 1572 | |
805b5d5e EB |
1573 | spin_lock(&sysctl_lock); |
1574 | if (prev) { | |
e51b6ba0 | 1575 | head = prev; |
805b5d5e EB |
1576 | tmp = &prev->ctl_entry; |
1577 | unuse_table(prev); | |
1578 | goto next; | |
1579 | } | |
1580 | tmp = &root_table_header.ctl_entry; | |
1581 | for (;;) { | |
1582 | head = list_entry(tmp, struct ctl_table_header, ctl_entry); | |
1583 | ||
1584 | if (!use_table(head)) | |
1585 | goto next; | |
1586 | spin_unlock(&sysctl_lock); | |
1587 | return head; | |
1588 | next: | |
e51b6ba0 | 1589 | root = head->root; |
805b5d5e | 1590 | tmp = tmp->next; |
e51b6ba0 EB |
1591 | header_list = lookup_header_list(root, namespaces); |
1592 | if (tmp != header_list) | |
1593 | continue; | |
1594 | ||
1595 | do { | |
1596 | root = list_entry(root->root_list.next, | |
1597 | struct ctl_table_root, root_list); | |
1598 | if (root == &sysctl_table_root) | |
1599 | goto out; | |
1600 | header_list = lookup_header_list(root, namespaces); | |
1601 | } while (list_empty(header_list)); | |
1602 | tmp = header_list->next; | |
805b5d5e | 1603 | } |
e51b6ba0 | 1604 | out: |
805b5d5e EB |
1605 | spin_unlock(&sysctl_lock); |
1606 | return NULL; | |
1607 | } | |
1608 | ||
e51b6ba0 EB |
1609 | struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev) |
1610 | { | |
1611 | return __sysctl_head_next(current->nsproxy, prev); | |
1612 | } | |
1613 | ||
1614 | void register_sysctl_root(struct ctl_table_root *root) | |
1615 | { | |
1616 | spin_lock(&sysctl_lock); | |
1617 | list_add_tail(&root->root_list, &sysctl_table_root.root_list); | |
1618 | spin_unlock(&sysctl_lock); | |
1619 | } | |
1620 | ||
1da177e4 | 1621 | /* |
1ff007eb | 1622 | * sysctl_perm does NOT grant the superuser all rights automatically, because |
1da177e4 LT |
1623 | * some sysctl variables are readonly even to root. |
1624 | */ | |
1625 | ||
1626 | static int test_perm(int mode, int op) | |
1627 | { | |
76aac0e9 | 1628 | if (!current_euid()) |
1da177e4 LT |
1629 | mode >>= 6; |
1630 | else if (in_egroup_p(0)) | |
1631 | mode >>= 3; | |
e6305c43 | 1632 | if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0) |
1da177e4 LT |
1633 | return 0; |
1634 | return -EACCES; | |
1635 | } | |
1636 | ||
d7321cd6 | 1637 | int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op) |
1da177e4 LT |
1638 | { |
1639 | int error; | |
d7321cd6 PE |
1640 | int mode; |
1641 | ||
e6305c43 | 1642 | error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC)); |
1da177e4 LT |
1643 | if (error) |
1644 | return error; | |
d7321cd6 PE |
1645 | |
1646 | if (root->permissions) | |
1647 | mode = root->permissions(root, current->nsproxy, table); | |
1648 | else | |
1649 | mode = table->mode; | |
1650 | ||
1651 | return test_perm(mode, op); | |
1da177e4 LT |
1652 | } |
1653 | ||
d912b0cc EB |
1654 | static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table) |
1655 | { | |
2315ffa0 | 1656 | for (; table->procname; table++) { |
d912b0cc EB |
1657 | table->parent = parent; |
1658 | if (table->child) | |
1659 | sysctl_set_parent(table, table->child); | |
1660 | } | |
1661 | } | |
1662 | ||
1663 | static __init int sysctl_init(void) | |
1664 | { | |
1665 | sysctl_set_parent(NULL, root_table); | |
88f458e4 HS |
1666 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
1667 | { | |
1668 | int err; | |
1669 | err = sysctl_check_table(current->nsproxy, root_table); | |
1670 | } | |
1671 | #endif | |
d912b0cc EB |
1672 | return 0; |
1673 | } | |
1674 | ||
1675 | core_initcall(sysctl_init); | |
1676 | ||
bfbcf034 AV |
1677 | static struct ctl_table *is_branch_in(struct ctl_table *branch, |
1678 | struct ctl_table *table) | |
ae7edecc AV |
1679 | { |
1680 | struct ctl_table *p; | |
1681 | const char *s = branch->procname; | |
1682 | ||
1683 | /* branch should have named subdirectory as its first element */ | |
1684 | if (!s || !branch->child) | |
bfbcf034 | 1685 | return NULL; |
ae7edecc AV |
1686 | |
1687 | /* ... and nothing else */ | |
2315ffa0 | 1688 | if (branch[1].procname) |
bfbcf034 | 1689 | return NULL; |
ae7edecc AV |
1690 | |
1691 | /* table should contain subdirectory with the same name */ | |
2315ffa0 | 1692 | for (p = table; p->procname; p++) { |
ae7edecc AV |
1693 | if (!p->child) |
1694 | continue; | |
1695 | if (p->procname && strcmp(p->procname, s) == 0) | |
bfbcf034 | 1696 | return p; |
ae7edecc | 1697 | } |
bfbcf034 | 1698 | return NULL; |
ae7edecc AV |
1699 | } |
1700 | ||
1701 | /* see if attaching q to p would be an improvement */ | |
1702 | static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q) | |
1703 | { | |
1704 | struct ctl_table *to = p->ctl_table, *by = q->ctl_table; | |
bfbcf034 | 1705 | struct ctl_table *next; |
ae7edecc AV |
1706 | int is_better = 0; |
1707 | int not_in_parent = !p->attached_by; | |
1708 | ||
bfbcf034 | 1709 | while ((next = is_branch_in(by, to)) != NULL) { |
ae7edecc AV |
1710 | if (by == q->attached_by) |
1711 | is_better = 1; | |
1712 | if (to == p->attached_by) | |
1713 | not_in_parent = 1; | |
1714 | by = by->child; | |
bfbcf034 | 1715 | to = next->child; |
ae7edecc AV |
1716 | } |
1717 | ||
1718 | if (is_better && not_in_parent) { | |
1719 | q->attached_by = by; | |
1720 | q->attached_to = to; | |
1721 | q->parent = p; | |
1722 | } | |
1723 | } | |
1724 | ||
1da177e4 | 1725 | /** |
e51b6ba0 EB |
1726 | * __register_sysctl_paths - register a sysctl hierarchy |
1727 | * @root: List of sysctl headers to register on | |
1728 | * @namespaces: Data to compute which lists of sysctl entries are visible | |
29e796fd | 1729 | * @path: The path to the directory the sysctl table is in. |
1da177e4 | 1730 | * @table: the top-level table structure |
1da177e4 LT |
1731 | * |
1732 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
29e796fd | 1733 | * array. A completely 0 filled entry terminates the table. |
1da177e4 | 1734 | * |
d8217f07 | 1735 | * The members of the &struct ctl_table structure are used as follows: |
1da177e4 | 1736 | * |
1da177e4 LT |
1737 | * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not |
1738 | * enter a sysctl file | |
1739 | * | |
1740 | * data - a pointer to data for use by proc_handler | |
1741 | * | |
1742 | * maxlen - the maximum size in bytes of the data | |
1743 | * | |
1744 | * mode - the file permissions for the /proc/sys file, and for sysctl(2) | |
1745 | * | |
1746 | * child - a pointer to the child sysctl table if this entry is a directory, or | |
1747 | * %NULL. | |
1748 | * | |
1749 | * proc_handler - the text handler routine (described below) | |
1750 | * | |
1da177e4 LT |
1751 | * de - for internal use by the sysctl routines |
1752 | * | |
1753 | * extra1, extra2 - extra pointers usable by the proc handler routines | |
1754 | * | |
1755 | * Leaf nodes in the sysctl tree will be represented by a single file | |
1756 | * under /proc; non-leaf nodes will be represented by directories. | |
1757 | * | |
1758 | * sysctl(2) can automatically manage read and write requests through | |
1759 | * the sysctl table. The data and maxlen fields of the ctl_table | |
1760 | * struct enable minimal validation of the values being written to be | |
1761 | * performed, and the mode field allows minimal authentication. | |
1762 | * | |
1da177e4 LT |
1763 | * There must be a proc_handler routine for any terminal nodes |
1764 | * mirrored under /proc/sys (non-terminals are handled by a built-in | |
1765 | * directory handler). Several default handlers are available to | |
1766 | * cover common cases - | |
1767 | * | |
1768 | * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(), | |
1769 | * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(), | |
1770 | * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax() | |
1771 | * | |
1772 | * It is the handler's job to read the input buffer from user memory | |
1773 | * and process it. The handler should return 0 on success. | |
1774 | * | |
1775 | * This routine returns %NULL on a failure to register, and a pointer | |
1776 | * to the table header on success. | |
1777 | */ | |
e51b6ba0 EB |
1778 | struct ctl_table_header *__register_sysctl_paths( |
1779 | struct ctl_table_root *root, | |
1780 | struct nsproxy *namespaces, | |
1781 | const struct ctl_path *path, struct ctl_table *table) | |
1da177e4 | 1782 | { |
29e796fd EB |
1783 | struct ctl_table_header *header; |
1784 | struct ctl_table *new, **prevp; | |
1785 | unsigned int n, npath; | |
ae7edecc | 1786 | struct ctl_table_set *set; |
29e796fd EB |
1787 | |
1788 | /* Count the path components */ | |
2315ffa0 | 1789 | for (npath = 0; path[npath].procname; ++npath) |
29e796fd EB |
1790 | ; |
1791 | ||
1792 | /* | |
1793 | * For each path component, allocate a 2-element ctl_table array. | |
1794 | * The first array element will be filled with the sysctl entry | |
2315ffa0 | 1795 | * for this, the second will be the sentinel (procname == 0). |
29e796fd EB |
1796 | * |
1797 | * We allocate everything in one go so that we don't have to | |
1798 | * worry about freeing additional memory in unregister_sysctl_table. | |
1799 | */ | |
1800 | header = kzalloc(sizeof(struct ctl_table_header) + | |
1801 | (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL); | |
1802 | if (!header) | |
1da177e4 | 1803 | return NULL; |
29e796fd EB |
1804 | |
1805 | new = (struct ctl_table *) (header + 1); | |
1806 | ||
1807 | /* Now connect the dots */ | |
1808 | prevp = &header->ctl_table; | |
1809 | for (n = 0; n < npath; ++n, ++path) { | |
1810 | /* Copy the procname */ | |
1811 | new->procname = path->procname; | |
29e796fd EB |
1812 | new->mode = 0555; |
1813 | ||
1814 | *prevp = new; | |
1815 | prevp = &new->child; | |
1816 | ||
1817 | new += 2; | |
1818 | } | |
1819 | *prevp = table; | |
23eb06de | 1820 | header->ctl_table_arg = table; |
29e796fd EB |
1821 | |
1822 | INIT_LIST_HEAD(&header->ctl_entry); | |
1823 | header->used = 0; | |
1824 | header->unregistering = NULL; | |
e51b6ba0 | 1825 | header->root = root; |
29e796fd | 1826 | sysctl_set_parent(NULL, header->ctl_table); |
f7e6ced4 | 1827 | header->count = 1; |
88f458e4 | 1828 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
e51b6ba0 | 1829 | if (sysctl_check_table(namespaces, header->ctl_table)) { |
29e796fd | 1830 | kfree(header); |
fc6cd25b EB |
1831 | return NULL; |
1832 | } | |
88f458e4 | 1833 | #endif |
330d57fb | 1834 | spin_lock(&sysctl_lock); |
73455092 | 1835 | header->set = lookup_header_set(root, namespaces); |
ae7edecc AV |
1836 | header->attached_by = header->ctl_table; |
1837 | header->attached_to = root_table; | |
1838 | header->parent = &root_table_header; | |
1839 | for (set = header->set; set; set = set->parent) { | |
1840 | struct ctl_table_header *p; | |
1841 | list_for_each_entry(p, &set->list, ctl_entry) { | |
1842 | if (p->unregistering) | |
1843 | continue; | |
1844 | try_attach(p, header); | |
1845 | } | |
1846 | } | |
1847 | header->parent->count++; | |
73455092 | 1848 | list_add_tail(&header->ctl_entry, &header->set->list); |
330d57fb | 1849 | spin_unlock(&sysctl_lock); |
29e796fd EB |
1850 | |
1851 | return header; | |
1852 | } | |
1853 | ||
e51b6ba0 EB |
1854 | /** |
1855 | * register_sysctl_table_path - register a sysctl table hierarchy | |
1856 | * @path: The path to the directory the sysctl table is in. | |
1857 | * @table: the top-level table structure | |
1858 | * | |
1859 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
1860 | * array. A completely 0 filled entry terminates the table. | |
1861 | * | |
1862 | * See __register_sysctl_paths for more details. | |
1863 | */ | |
1864 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, | |
1865 | struct ctl_table *table) | |
1866 | { | |
1867 | return __register_sysctl_paths(&sysctl_table_root, current->nsproxy, | |
1868 | path, table); | |
1869 | } | |
1870 | ||
29e796fd EB |
1871 | /** |
1872 | * register_sysctl_table - register a sysctl table hierarchy | |
1873 | * @table: the top-level table structure | |
1874 | * | |
1875 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
1876 | * array. A completely 0 filled entry terminates the table. | |
1877 | * | |
1878 | * See register_sysctl_paths for more details. | |
1879 | */ | |
1880 | struct ctl_table_header *register_sysctl_table(struct ctl_table *table) | |
1881 | { | |
1882 | static const struct ctl_path null_path[] = { {} }; | |
1883 | ||
1884 | return register_sysctl_paths(null_path, table); | |
1da177e4 LT |
1885 | } |
1886 | ||
1887 | /** | |
1888 | * unregister_sysctl_table - unregister a sysctl table hierarchy | |
1889 | * @header: the header returned from register_sysctl_table | |
1890 | * | |
1891 | * Unregisters the sysctl table and all children. proc entries may not | |
1892 | * actually be removed until they are no longer used by anyone. | |
1893 | */ | |
1894 | void unregister_sysctl_table(struct ctl_table_header * header) | |
1895 | { | |
330d57fb | 1896 | might_sleep(); |
f1dad166 PE |
1897 | |
1898 | if (header == NULL) | |
1899 | return; | |
1900 | ||
330d57fb AV |
1901 | spin_lock(&sysctl_lock); |
1902 | start_unregistering(header); | |
ae7edecc AV |
1903 | if (!--header->parent->count) { |
1904 | WARN_ON(1); | |
1905 | kfree(header->parent); | |
1906 | } | |
f7e6ced4 AV |
1907 | if (!--header->count) |
1908 | kfree(header); | |
330d57fb | 1909 | spin_unlock(&sysctl_lock); |
1da177e4 LT |
1910 | } |
1911 | ||
9043476f AV |
1912 | int sysctl_is_seen(struct ctl_table_header *p) |
1913 | { | |
1914 | struct ctl_table_set *set = p->set; | |
1915 | int res; | |
1916 | spin_lock(&sysctl_lock); | |
1917 | if (p->unregistering) | |
1918 | res = 0; | |
1919 | else if (!set->is_seen) | |
1920 | res = 1; | |
1921 | else | |
1922 | res = set->is_seen(set); | |
1923 | spin_unlock(&sysctl_lock); | |
1924 | return res; | |
1925 | } | |
1926 | ||
73455092 AV |
1927 | void setup_sysctl_set(struct ctl_table_set *p, |
1928 | struct ctl_table_set *parent, | |
1929 | int (*is_seen)(struct ctl_table_set *)) | |
1930 | { | |
1931 | INIT_LIST_HEAD(&p->list); | |
1932 | p->parent = parent ? parent : &sysctl_table_root.default_set; | |
1933 | p->is_seen = is_seen; | |
1934 | } | |
1935 | ||
b89a8171 | 1936 | #else /* !CONFIG_SYSCTL */ |
d8217f07 | 1937 | struct ctl_table_header *register_sysctl_table(struct ctl_table * table) |
b89a8171 EB |
1938 | { |
1939 | return NULL; | |
1940 | } | |
1941 | ||
29e796fd EB |
1942 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, |
1943 | struct ctl_table *table) | |
1944 | { | |
1945 | return NULL; | |
1946 | } | |
1947 | ||
b89a8171 EB |
1948 | void unregister_sysctl_table(struct ctl_table_header * table) |
1949 | { | |
1950 | } | |
1951 | ||
73455092 AV |
1952 | void setup_sysctl_set(struct ctl_table_set *p, |
1953 | struct ctl_table_set *parent, | |
1954 | int (*is_seen)(struct ctl_table_set *)) | |
1955 | { | |
1956 | } | |
1957 | ||
f7e6ced4 AV |
1958 | void sysctl_head_put(struct ctl_table_header *head) |
1959 | { | |
1960 | } | |
1961 | ||
b89a8171 EB |
1962 | #endif /* CONFIG_SYSCTL */ |
1963 | ||
1da177e4 LT |
1964 | /* |
1965 | * /proc/sys support | |
1966 | */ | |
1967 | ||
b89a8171 | 1968 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1969 | |
b1ba4ddd | 1970 | static int _proc_do_string(void* data, int maxlen, int write, |
8d65af78 | 1971 | void __user *buffer, |
b1ba4ddd | 1972 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1973 | { |
1974 | size_t len; | |
1975 | char __user *p; | |
1976 | char c; | |
8d060877 ON |
1977 | |
1978 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1979 | *lenp = 0; |
1980 | return 0; | |
1981 | } | |
8d060877 | 1982 | |
1da177e4 LT |
1983 | if (write) { |
1984 | len = 0; | |
1985 | p = buffer; | |
1986 | while (len < *lenp) { | |
1987 | if (get_user(c, p++)) | |
1988 | return -EFAULT; | |
1989 | if (c == 0 || c == '\n') | |
1990 | break; | |
1991 | len++; | |
1992 | } | |
f5dd3d6f SV |
1993 | if (len >= maxlen) |
1994 | len = maxlen-1; | |
1995 | if(copy_from_user(data, buffer, len)) | |
1da177e4 | 1996 | return -EFAULT; |
f5dd3d6f | 1997 | ((char *) data)[len] = 0; |
1da177e4 LT |
1998 | *ppos += *lenp; |
1999 | } else { | |
f5dd3d6f SV |
2000 | len = strlen(data); |
2001 | if (len > maxlen) | |
2002 | len = maxlen; | |
8d060877 ON |
2003 | |
2004 | if (*ppos > len) { | |
2005 | *lenp = 0; | |
2006 | return 0; | |
2007 | } | |
2008 | ||
2009 | data += *ppos; | |
2010 | len -= *ppos; | |
2011 | ||
1da177e4 LT |
2012 | if (len > *lenp) |
2013 | len = *lenp; | |
2014 | if (len) | |
f5dd3d6f | 2015 | if(copy_to_user(buffer, data, len)) |
1da177e4 LT |
2016 | return -EFAULT; |
2017 | if (len < *lenp) { | |
2018 | if(put_user('\n', ((char __user *) buffer) + len)) | |
2019 | return -EFAULT; | |
2020 | len++; | |
2021 | } | |
2022 | *lenp = len; | |
2023 | *ppos += len; | |
2024 | } | |
2025 | return 0; | |
2026 | } | |
2027 | ||
f5dd3d6f SV |
2028 | /** |
2029 | * proc_dostring - read a string sysctl | |
2030 | * @table: the sysctl table | |
2031 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
2032 | * @buffer: the user buffer |
2033 | * @lenp: the size of the user buffer | |
2034 | * @ppos: file position | |
2035 | * | |
2036 | * Reads/writes a string from/to the user buffer. If the kernel | |
2037 | * buffer provided is not large enough to hold the string, the | |
2038 | * string is truncated. The copied string is %NULL-terminated. | |
2039 | * If the string is being read by the user process, it is copied | |
2040 | * and a newline '\n' is added. It is truncated if the buffer is | |
2041 | * not large enough. | |
2042 | * | |
2043 | * Returns 0 on success. | |
2044 | */ | |
8d65af78 | 2045 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2046 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2047 | { | |
8d65af78 | 2048 | return _proc_do_string(table->data, table->maxlen, write, |
f5dd3d6f SV |
2049 | buffer, lenp, ppos); |
2050 | } | |
2051 | ||
1da177e4 LT |
2052 | |
2053 | static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp, | |
2054 | int *valp, | |
2055 | int write, void *data) | |
2056 | { | |
2057 | if (write) { | |
2058 | *valp = *negp ? -*lvalp : *lvalp; | |
2059 | } else { | |
2060 | int val = *valp; | |
2061 | if (val < 0) { | |
2062 | *negp = -1; | |
2063 | *lvalp = (unsigned long)-val; | |
2064 | } else { | |
2065 | *negp = 0; | |
2066 | *lvalp = (unsigned long)val; | |
2067 | } | |
2068 | } | |
2069 | return 0; | |
2070 | } | |
2071 | ||
d8217f07 | 2072 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2073 | int write, void __user *buffer, |
fcfbd547 | 2074 | size_t *lenp, loff_t *ppos, |
1da177e4 LT |
2075 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, |
2076 | int write, void *data), | |
2077 | void *data) | |
2078 | { | |
2079 | #define TMPBUFLEN 21 | |
7338f299 | 2080 | int *i, vleft, first = 1, neg; |
1da177e4 LT |
2081 | unsigned long lval; |
2082 | size_t left, len; | |
2083 | ||
2084 | char buf[TMPBUFLEN], *p; | |
2085 | char __user *s = buffer; | |
2086 | ||
fcfbd547 | 2087 | if (!tbl_data || !table->maxlen || !*lenp || |
1da177e4 LT |
2088 | (*ppos && !write)) { |
2089 | *lenp = 0; | |
2090 | return 0; | |
2091 | } | |
2092 | ||
fcfbd547 | 2093 | i = (int *) tbl_data; |
1da177e4 LT |
2094 | vleft = table->maxlen / sizeof(*i); |
2095 | left = *lenp; | |
2096 | ||
2097 | if (!conv) | |
2098 | conv = do_proc_dointvec_conv; | |
2099 | ||
2100 | for (; left && vleft--; i++, first=0) { | |
2101 | if (write) { | |
2102 | while (left) { | |
2103 | char c; | |
2104 | if (get_user(c, s)) | |
2105 | return -EFAULT; | |
2106 | if (!isspace(c)) | |
2107 | break; | |
2108 | left--; | |
2109 | s++; | |
2110 | } | |
2111 | if (!left) | |
2112 | break; | |
2113 | neg = 0; | |
2114 | len = left; | |
2115 | if (len > sizeof(buf) - 1) | |
2116 | len = sizeof(buf) - 1; | |
2117 | if (copy_from_user(buf, s, len)) | |
2118 | return -EFAULT; | |
2119 | buf[len] = 0; | |
2120 | p = buf; | |
2121 | if (*p == '-' && left > 1) { | |
2122 | neg = 1; | |
bd9b0bac | 2123 | p++; |
1da177e4 LT |
2124 | } |
2125 | if (*p < '0' || *p > '9') | |
2126 | break; | |
2127 | ||
2128 | lval = simple_strtoul(p, &p, 0); | |
2129 | ||
2130 | len = p-buf; | |
2131 | if ((len < left) && *p && !isspace(*p)) | |
2132 | break; | |
1da177e4 LT |
2133 | s += len; |
2134 | left -= len; | |
2135 | ||
2136 | if (conv(&neg, &lval, i, 1, data)) | |
2137 | break; | |
2138 | } else { | |
2139 | p = buf; | |
2140 | if (!first) | |
2141 | *p++ = '\t'; | |
2142 | ||
2143 | if (conv(&neg, &lval, i, 0, data)) | |
2144 | break; | |
2145 | ||
2146 | sprintf(p, "%s%lu", neg ? "-" : "", lval); | |
2147 | len = strlen(buf); | |
2148 | if (len > left) | |
2149 | len = left; | |
2150 | if(copy_to_user(s, buf, len)) | |
2151 | return -EFAULT; | |
2152 | left -= len; | |
2153 | s += len; | |
2154 | } | |
2155 | } | |
2156 | ||
2157 | if (!write && !first && left) { | |
2158 | if(put_user('\n', s)) | |
2159 | return -EFAULT; | |
2160 | left--, s++; | |
2161 | } | |
2162 | if (write) { | |
2163 | while (left) { | |
2164 | char c; | |
2165 | if (get_user(c, s++)) | |
2166 | return -EFAULT; | |
2167 | if (!isspace(c)) | |
2168 | break; | |
2169 | left--; | |
2170 | } | |
2171 | } | |
2172 | if (write && first) | |
2173 | return -EINVAL; | |
2174 | *lenp -= left; | |
2175 | *ppos += *lenp; | |
2176 | return 0; | |
2177 | #undef TMPBUFLEN | |
2178 | } | |
2179 | ||
8d65af78 | 2180 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 KK |
2181 | void __user *buffer, size_t *lenp, loff_t *ppos, |
2182 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, | |
2183 | int write, void *data), | |
2184 | void *data) | |
2185 | { | |
8d65af78 | 2186 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2187 | buffer, lenp, ppos, conv, data); |
2188 | } | |
2189 | ||
1da177e4 LT |
2190 | /** |
2191 | * proc_dointvec - read a vector of integers | |
2192 | * @table: the sysctl table | |
2193 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2194 | * @buffer: the user buffer |
2195 | * @lenp: the size of the user buffer | |
2196 | * @ppos: file position | |
2197 | * | |
2198 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2199 | * values from/to the user buffer, treated as an ASCII string. | |
2200 | * | |
2201 | * Returns 0 on success. | |
2202 | */ | |
8d65af78 | 2203 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2204 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2205 | { | |
8d65af78 | 2206 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2207 | NULL,NULL); |
2208 | } | |
2209 | ||
34f5a398 | 2210 | /* |
25ddbb18 AK |
2211 | * Taint values can only be increased |
2212 | * This means we can safely use a temporary. | |
34f5a398 | 2213 | */ |
8d65af78 | 2214 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2215 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2216 | { | |
25ddbb18 AK |
2217 | struct ctl_table t; |
2218 | unsigned long tmptaint = get_taint(); | |
2219 | int err; | |
34f5a398 | 2220 | |
91fcd412 | 2221 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2222 | return -EPERM; |
2223 | ||
25ddbb18 AK |
2224 | t = *table; |
2225 | t.data = &tmptaint; | |
8d65af78 | 2226 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2227 | if (err < 0) |
2228 | return err; | |
2229 | ||
2230 | if (write) { | |
2231 | /* | |
2232 | * Poor man's atomic or. Not worth adding a primitive | |
2233 | * to everyone's atomic.h for this | |
2234 | */ | |
2235 | int i; | |
2236 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2237 | if ((tmptaint >> i) & 1) | |
2238 | add_taint(i); | |
2239 | } | |
2240 | } | |
2241 | ||
2242 | return err; | |
34f5a398 TT |
2243 | } |
2244 | ||
1da177e4 LT |
2245 | struct do_proc_dointvec_minmax_conv_param { |
2246 | int *min; | |
2247 | int *max; | |
2248 | }; | |
2249 | ||
2250 | static int do_proc_dointvec_minmax_conv(int *negp, unsigned long *lvalp, | |
2251 | int *valp, | |
2252 | int write, void *data) | |
2253 | { | |
2254 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2255 | if (write) { | |
2256 | int val = *negp ? -*lvalp : *lvalp; | |
2257 | if ((param->min && *param->min > val) || | |
2258 | (param->max && *param->max < val)) | |
2259 | return -EINVAL; | |
2260 | *valp = val; | |
2261 | } else { | |
2262 | int val = *valp; | |
2263 | if (val < 0) { | |
2264 | *negp = -1; | |
2265 | *lvalp = (unsigned long)-val; | |
2266 | } else { | |
2267 | *negp = 0; | |
2268 | *lvalp = (unsigned long)val; | |
2269 | } | |
2270 | } | |
2271 | return 0; | |
2272 | } | |
2273 | ||
2274 | /** | |
2275 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2276 | * @table: the sysctl table | |
2277 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2278 | * @buffer: the user buffer |
2279 | * @lenp: the size of the user buffer | |
2280 | * @ppos: file position | |
2281 | * | |
2282 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2283 | * values from/to the user buffer, treated as an ASCII string. | |
2284 | * | |
2285 | * This routine will ensure the values are within the range specified by | |
2286 | * table->extra1 (min) and table->extra2 (max). | |
2287 | * | |
2288 | * Returns 0 on success. | |
2289 | */ | |
8d65af78 | 2290 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2291 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2292 | { | |
2293 | struct do_proc_dointvec_minmax_conv_param param = { | |
2294 | .min = (int *) table->extra1, | |
2295 | .max = (int *) table->extra2, | |
2296 | }; | |
8d65af78 | 2297 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2298 | do_proc_dointvec_minmax_conv, ¶m); |
2299 | } | |
2300 | ||
d8217f07 | 2301 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2302 | void __user *buffer, |
2303 | size_t *lenp, loff_t *ppos, | |
2304 | unsigned long convmul, | |
2305 | unsigned long convdiv) | |
2306 | { | |
2307 | #define TMPBUFLEN 21 | |
2308 | unsigned long *i, *min, *max, val; | |
2309 | int vleft, first=1, neg; | |
2310 | size_t len, left; | |
2311 | char buf[TMPBUFLEN], *p; | |
2312 | char __user *s = buffer; | |
2313 | ||
fcfbd547 | 2314 | if (!data || !table->maxlen || !*lenp || |
1da177e4 LT |
2315 | (*ppos && !write)) { |
2316 | *lenp = 0; | |
2317 | return 0; | |
2318 | } | |
2319 | ||
fcfbd547 | 2320 | i = (unsigned long *) data; |
1da177e4 LT |
2321 | min = (unsigned long *) table->extra1; |
2322 | max = (unsigned long *) table->extra2; | |
2323 | vleft = table->maxlen / sizeof(unsigned long); | |
2324 | left = *lenp; | |
2325 | ||
2326 | for (; left && vleft--; i++, min++, max++, first=0) { | |
2327 | if (write) { | |
2328 | while (left) { | |
2329 | char c; | |
2330 | if (get_user(c, s)) | |
2331 | return -EFAULT; | |
2332 | if (!isspace(c)) | |
2333 | break; | |
2334 | left--; | |
2335 | s++; | |
2336 | } | |
2337 | if (!left) | |
2338 | break; | |
2339 | neg = 0; | |
2340 | len = left; | |
2341 | if (len > TMPBUFLEN-1) | |
2342 | len = TMPBUFLEN-1; | |
2343 | if (copy_from_user(buf, s, len)) | |
2344 | return -EFAULT; | |
2345 | buf[len] = 0; | |
2346 | p = buf; | |
2347 | if (*p == '-' && left > 1) { | |
2348 | neg = 1; | |
bd9b0bac | 2349 | p++; |
1da177e4 LT |
2350 | } |
2351 | if (*p < '0' || *p > '9') | |
2352 | break; | |
2353 | val = simple_strtoul(p, &p, 0) * convmul / convdiv ; | |
2354 | len = p-buf; | |
2355 | if ((len < left) && *p && !isspace(*p)) | |
2356 | break; | |
2357 | if (neg) | |
2358 | val = -val; | |
2359 | s += len; | |
2360 | left -= len; | |
2361 | ||
2362 | if(neg) | |
2363 | continue; | |
2364 | if ((min && val < *min) || (max && val > *max)) | |
2365 | continue; | |
2366 | *i = val; | |
2367 | } else { | |
2368 | p = buf; | |
2369 | if (!first) | |
2370 | *p++ = '\t'; | |
2371 | sprintf(p, "%lu", convdiv * (*i) / convmul); | |
2372 | len = strlen(buf); | |
2373 | if (len > left) | |
2374 | len = left; | |
2375 | if(copy_to_user(s, buf, len)) | |
2376 | return -EFAULT; | |
2377 | left -= len; | |
2378 | s += len; | |
2379 | } | |
2380 | } | |
2381 | ||
2382 | if (!write && !first && left) { | |
2383 | if(put_user('\n', s)) | |
2384 | return -EFAULT; | |
2385 | left--, s++; | |
2386 | } | |
2387 | if (write) { | |
2388 | while (left) { | |
2389 | char c; | |
2390 | if (get_user(c, s++)) | |
2391 | return -EFAULT; | |
2392 | if (!isspace(c)) | |
2393 | break; | |
2394 | left--; | |
2395 | } | |
2396 | } | |
2397 | if (write && first) | |
2398 | return -EINVAL; | |
2399 | *lenp -= left; | |
2400 | *ppos += *lenp; | |
2401 | return 0; | |
2402 | #undef TMPBUFLEN | |
2403 | } | |
2404 | ||
d8217f07 | 2405 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2406 | void __user *buffer, |
2407 | size_t *lenp, loff_t *ppos, | |
2408 | unsigned long convmul, | |
2409 | unsigned long convdiv) | |
2410 | { | |
2411 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2412 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2413 | } |
2414 | ||
1da177e4 LT |
2415 | /** |
2416 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2417 | * @table: the sysctl table | |
2418 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2419 | * @buffer: the user buffer |
2420 | * @lenp: the size of the user buffer | |
2421 | * @ppos: file position | |
2422 | * | |
2423 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2424 | * values from/to the user buffer, treated as an ASCII string. | |
2425 | * | |
2426 | * This routine will ensure the values are within the range specified by | |
2427 | * table->extra1 (min) and table->extra2 (max). | |
2428 | * | |
2429 | * Returns 0 on success. | |
2430 | */ | |
8d65af78 | 2431 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2432 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2433 | { | |
8d65af78 | 2434 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2435 | } |
2436 | ||
2437 | /** | |
2438 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2439 | * @table: the sysctl table | |
2440 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2441 | * @buffer: the user buffer |
2442 | * @lenp: the size of the user buffer | |
2443 | * @ppos: file position | |
2444 | * | |
2445 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2446 | * values from/to the user buffer, treated as an ASCII string. The values | |
2447 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2448 | * | |
2449 | * This routine will ensure the values are within the range specified by | |
2450 | * table->extra1 (min) and table->extra2 (max). | |
2451 | * | |
2452 | * Returns 0 on success. | |
2453 | */ | |
d8217f07 | 2454 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2455 | void __user *buffer, |
2456 | size_t *lenp, loff_t *ppos) | |
2457 | { | |
8d65af78 | 2458 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2459 | lenp, ppos, HZ, 1000l); |
2460 | } | |
2461 | ||
2462 | ||
2463 | static int do_proc_dointvec_jiffies_conv(int *negp, unsigned long *lvalp, | |
2464 | int *valp, | |
2465 | int write, void *data) | |
2466 | { | |
2467 | if (write) { | |
cba9f33d BS |
2468 | if (*lvalp > LONG_MAX / HZ) |
2469 | return 1; | |
1da177e4 LT |
2470 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2471 | } else { | |
2472 | int val = *valp; | |
2473 | unsigned long lval; | |
2474 | if (val < 0) { | |
2475 | *negp = -1; | |
2476 | lval = (unsigned long)-val; | |
2477 | } else { | |
2478 | *negp = 0; | |
2479 | lval = (unsigned long)val; | |
2480 | } | |
2481 | *lvalp = lval / HZ; | |
2482 | } | |
2483 | return 0; | |
2484 | } | |
2485 | ||
2486 | static int do_proc_dointvec_userhz_jiffies_conv(int *negp, unsigned long *lvalp, | |
2487 | int *valp, | |
2488 | int write, void *data) | |
2489 | { | |
2490 | if (write) { | |
cba9f33d BS |
2491 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2492 | return 1; | |
1da177e4 LT |
2493 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2494 | } else { | |
2495 | int val = *valp; | |
2496 | unsigned long lval; | |
2497 | if (val < 0) { | |
2498 | *negp = -1; | |
2499 | lval = (unsigned long)-val; | |
2500 | } else { | |
2501 | *negp = 0; | |
2502 | lval = (unsigned long)val; | |
2503 | } | |
2504 | *lvalp = jiffies_to_clock_t(lval); | |
2505 | } | |
2506 | return 0; | |
2507 | } | |
2508 | ||
2509 | static int do_proc_dointvec_ms_jiffies_conv(int *negp, unsigned long *lvalp, | |
2510 | int *valp, | |
2511 | int write, void *data) | |
2512 | { | |
2513 | if (write) { | |
2514 | *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); | |
2515 | } else { | |
2516 | int val = *valp; | |
2517 | unsigned long lval; | |
2518 | if (val < 0) { | |
2519 | *negp = -1; | |
2520 | lval = (unsigned long)-val; | |
2521 | } else { | |
2522 | *negp = 0; | |
2523 | lval = (unsigned long)val; | |
2524 | } | |
2525 | *lvalp = jiffies_to_msecs(lval); | |
2526 | } | |
2527 | return 0; | |
2528 | } | |
2529 | ||
2530 | /** | |
2531 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2532 | * @table: the sysctl table | |
2533 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2534 | * @buffer: the user buffer |
2535 | * @lenp: the size of the user buffer | |
2536 | * @ppos: file position | |
2537 | * | |
2538 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2539 | * values from/to the user buffer, treated as an ASCII string. | |
2540 | * The values read are assumed to be in seconds, and are converted into | |
2541 | * jiffies. | |
2542 | * | |
2543 | * Returns 0 on success. | |
2544 | */ | |
8d65af78 | 2545 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2546 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2547 | { | |
8d65af78 | 2548 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2549 | do_proc_dointvec_jiffies_conv,NULL); |
2550 | } | |
2551 | ||
2552 | /** | |
2553 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2554 | * @table: the sysctl table | |
2555 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2556 | * @buffer: the user buffer |
2557 | * @lenp: the size of the user buffer | |
1e5d5331 | 2558 | * @ppos: pointer to the file position |
1da177e4 LT |
2559 | * |
2560 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2561 | * values from/to the user buffer, treated as an ASCII string. | |
2562 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2563 | * are converted into jiffies. | |
2564 | * | |
2565 | * Returns 0 on success. | |
2566 | */ | |
8d65af78 | 2567 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2568 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2569 | { | |
8d65af78 | 2570 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2571 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2572 | } | |
2573 | ||
2574 | /** | |
2575 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2576 | * @table: the sysctl table | |
2577 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2578 | * @buffer: the user buffer |
2579 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2580 | * @ppos: file position |
2581 | * @ppos: the current position in the file | |
1da177e4 LT |
2582 | * |
2583 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2584 | * values from/to the user buffer, treated as an ASCII string. | |
2585 | * The values read are assumed to be in 1/1000 seconds, and | |
2586 | * are converted into jiffies. | |
2587 | * | |
2588 | * Returns 0 on success. | |
2589 | */ | |
8d65af78 | 2590 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2591 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2592 | { | |
8d65af78 | 2593 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2594 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2595 | } | |
2596 | ||
8d65af78 | 2597 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2598 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2599 | { | |
2600 | struct pid *new_pid; | |
2601 | pid_t tmp; | |
2602 | int r; | |
2603 | ||
6c5f3e7b | 2604 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2605 | |
8d65af78 | 2606 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2607 | lenp, ppos, NULL, NULL); |
2608 | if (r || !write) | |
2609 | return r; | |
2610 | ||
2611 | new_pid = find_get_pid(tmp); | |
2612 | if (!new_pid) | |
2613 | return -ESRCH; | |
2614 | ||
2615 | put_pid(xchg(&cad_pid, new_pid)); | |
2616 | return 0; | |
2617 | } | |
2618 | ||
1da177e4 LT |
2619 | #else /* CONFIG_PROC_FS */ |
2620 | ||
8d65af78 | 2621 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2622 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2623 | { | |
2624 | return -ENOSYS; | |
2625 | } | |
2626 | ||
8d65af78 | 2627 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2628 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2629 | { |
2630 | return -ENOSYS; | |
2631 | } | |
2632 | ||
8d65af78 | 2633 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2634 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2635 | { | |
2636 | return -ENOSYS; | |
2637 | } | |
2638 | ||
8d65af78 | 2639 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2640 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2641 | { | |
2642 | return -ENOSYS; | |
2643 | } | |
2644 | ||
8d65af78 | 2645 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2646 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2647 | { | |
2648 | return -ENOSYS; | |
2649 | } | |
2650 | ||
8d65af78 | 2651 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2652 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2653 | { | |
2654 | return -ENOSYS; | |
2655 | } | |
2656 | ||
8d65af78 | 2657 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2658 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2659 | { | |
2660 | return -ENOSYS; | |
2661 | } | |
2662 | ||
d8217f07 | 2663 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2664 | void __user *buffer, |
2665 | size_t *lenp, loff_t *ppos) | |
2666 | { | |
2667 | return -ENOSYS; | |
2668 | } | |
2669 | ||
2670 | ||
2671 | #endif /* CONFIG_PROC_FS */ | |
2672 | ||
1da177e4 LT |
2673 | /* |
2674 | * No sense putting this after each symbol definition, twice, | |
2675 | * exception granted :-) | |
2676 | */ | |
2677 | EXPORT_SYMBOL(proc_dointvec); | |
2678 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2679 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2680 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2681 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2682 | EXPORT_SYMBOL(proc_dostring); | |
2683 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2684 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); | |
2685 | EXPORT_SYMBOL(register_sysctl_table); | |
29e796fd | 2686 | EXPORT_SYMBOL(register_sysctl_paths); |
1da177e4 | 2687 | EXPORT_SYMBOL(unregister_sysctl_table); |