Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 LT |
21 | #include <linux/module.h> |
22 | #include <linux/mm.h> | |
23 | #include <linux/swap.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/sysctl.h> | |
d33ed52d | 26 | #include <linux/signal.h> |
455cd5ab | 27 | #include <linux/printk.h> |
1da177e4 | 28 | #include <linux/proc_fs.h> |
72c2d582 | 29 | #include <linux/security.h> |
1da177e4 | 30 | #include <linux/ctype.h> |
dfec072e | 31 | #include <linux/kmemcheck.h> |
62239ac2 | 32 | #include <linux/fs.h> |
1da177e4 LT |
33 | #include <linux/init.h> |
34 | #include <linux/kernel.h> | |
0296b228 | 35 | #include <linux/kobject.h> |
20380731 | 36 | #include <linux/net.h> |
1da177e4 LT |
37 | #include <linux/sysrq.h> |
38 | #include <linux/highuid.h> | |
39 | #include <linux/writeback.h> | |
3fff4c42 | 40 | #include <linux/ratelimit.h> |
76ab0f53 | 41 | #include <linux/compaction.h> |
1da177e4 | 42 | #include <linux/hugetlb.h> |
1da177e4 | 43 | #include <linux/initrd.h> |
0b77f5bf | 44 | #include <linux/key.h> |
1da177e4 LT |
45 | #include <linux/times.h> |
46 | #include <linux/limits.h> | |
47 | #include <linux/dcache.h> | |
6e006701 | 48 | #include <linux/dnotify.h> |
1da177e4 | 49 | #include <linux/syscalls.h> |
c748e134 | 50 | #include <linux/vmstat.h> |
c255d844 PM |
51 | #include <linux/nfs_fs.h> |
52 | #include <linux/acpi.h> | |
10a0a8d4 | 53 | #include <linux/reboot.h> |
b0fc494f | 54 | #include <linux/ftrace.h> |
cdd6c482 | 55 | #include <linux/perf_event.h> |
b2be84df | 56 | #include <linux/kprobes.h> |
b492e95b | 57 | #include <linux/pipe_fs_i.h> |
8e4228e1 | 58 | #include <linux/oom.h> |
1da177e4 LT |
59 | |
60 | #include <asm/uaccess.h> | |
61 | #include <asm/processor.h> | |
62 | ||
29cbc78b AK |
63 | #ifdef CONFIG_X86 |
64 | #include <asm/nmi.h> | |
0741f4d2 | 65 | #include <asm/stacktrace.h> |
6e7c4025 | 66 | #include <asm/io.h> |
29cbc78b | 67 | #endif |
c55b7c3e DY |
68 | #ifdef CONFIG_BSD_PROCESS_ACCT |
69 | #include <linux/acct.h> | |
70 | #endif | |
4f0e056f DY |
71 | #ifdef CONFIG_RT_MUTEXES |
72 | #include <linux/rtmutex.h> | |
73 | #endif | |
2edf5e49 DY |
74 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
75 | #include <linux/lockdep.h> | |
76 | #endif | |
15485a46 DY |
77 | #ifdef CONFIG_CHR_DEV_SG |
78 | #include <scsi/sg.h> | |
79 | #endif | |
29cbc78b | 80 | |
58687acb | 81 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
82 | #include <linux/nmi.h> |
83 | #endif | |
84 | ||
7058cb02 | 85 | |
1da177e4 LT |
86 | #if defined(CONFIG_SYSCTL) |
87 | ||
88 | /* External variables not in a header file. */ | |
1da177e4 LT |
89 | extern int sysctl_overcommit_memory; |
90 | extern int sysctl_overcommit_ratio; | |
91 | extern int max_threads; | |
1da177e4 | 92 | extern int core_uses_pid; |
d6e71144 | 93 | extern int suid_dumpable; |
1da177e4 | 94 | extern char core_pattern[]; |
a293980c | 95 | extern unsigned int core_pipe_limit; |
1da177e4 LT |
96 | extern int pid_max; |
97 | extern int min_free_kbytes; | |
1da177e4 | 98 | extern int pid_max_min, pid_max_max; |
9d0243bc | 99 | extern int sysctl_drop_caches; |
8ad4b1fb | 100 | extern int percpu_pagelist_fraction; |
bebfa101 | 101 | extern int compat_log; |
9745512c | 102 | extern int latencytop_enabled; |
eceea0b3 | 103 | extern int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
104 | #ifndef CONFIG_MMU |
105 | extern int sysctl_nr_trim_pages; | |
106 | #endif | |
cb684b5b | 107 | #ifdef CONFIG_BLOCK |
5e605b64 | 108 | extern int blk_iopoll_enabled; |
cb684b5b | 109 | #endif |
1da177e4 | 110 | |
c4f3b63f | 111 | /* Constants used for minimum and maximum */ |
2508ce18 | 112 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f | 113 | static int sixty = 60; |
9383d967 | 114 | static int neg_one = -1; |
c4f3b63f RT |
115 | #endif |
116 | ||
c4f3b63f | 117 | static int zero; |
cd5f9a4c LT |
118 | static int __maybe_unused one = 1; |
119 | static int __maybe_unused two = 2; | |
fc3501d4 | 120 | static unsigned long one_ul = 1; |
c4f3b63f | 121 | static int one_hundred = 100; |
af91322e DY |
122 | #ifdef CONFIG_PRINTK |
123 | static int ten_thousand = 10000; | |
124 | #endif | |
c4f3b63f | 125 | |
9e4a5bda AR |
126 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
127 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
128 | ||
1da177e4 LT |
129 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
130 | static int maxolduid = 65535; | |
131 | static int minolduid; | |
8ad4b1fb | 132 | static int min_percpu_pagelist_fract = 8; |
1da177e4 LT |
133 | |
134 | static int ngroups_max = NGROUPS_MAX; | |
135 | ||
d14f1729 DY |
136 | #ifdef CONFIG_INOTIFY_USER |
137 | #include <linux/inotify.h> | |
138 | #endif | |
72c57ed5 | 139 | #ifdef CONFIG_SPARC |
17f04fbb | 140 | #include <asm/system.h> |
1da177e4 LT |
141 | #endif |
142 | ||
0871420f DM |
143 | #ifdef CONFIG_SPARC64 |
144 | extern int sysctl_tsb_ratio; | |
145 | #endif | |
146 | ||
1da177e4 LT |
147 | #ifdef __hppa__ |
148 | extern int pwrsw_enabled; | |
149 | extern int unaligned_enabled; | |
150 | #endif | |
151 | ||
347a8dc3 | 152 | #ifdef CONFIG_S390 |
1da177e4 LT |
153 | #ifdef CONFIG_MATHEMU |
154 | extern int sysctl_ieee_emulation_warnings; | |
155 | #endif | |
156 | extern int sysctl_userprocess_debug; | |
951f22d5 | 157 | extern int spin_retry; |
1da177e4 LT |
158 | #endif |
159 | ||
d2b176ed JS |
160 | #ifdef CONFIG_IA64 |
161 | extern int no_unaligned_warning; | |
88fc241f | 162 | extern int unaligned_dump_stack; |
d2b176ed JS |
163 | #endif |
164 | ||
d6f8ff73 | 165 | #ifdef CONFIG_PROC_SYSCTL |
8d65af78 | 166 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 167 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 168 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 169 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 170 | #endif |
9ec52099 | 171 | |
97f5f0cd | 172 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 AW |
173 | /* Note: sysrq code uses it's own private copy */ |
174 | static int __sysrq_enabled = SYSRQ_DEFAULT_ENABLE; | |
97f5f0cd DT |
175 | |
176 | static int sysrq_sysctl_handler(ctl_table *table, int write, | |
177 | void __user *buffer, size_t *lenp, | |
178 | loff_t *ppos) | |
179 | { | |
180 | int error; | |
181 | ||
182 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
183 | if (error) | |
184 | return error; | |
185 | ||
186 | if (write) | |
187 | sysrq_toggle_support(__sysrq_enabled); | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | #endif | |
193 | ||
d8217f07 | 194 | static struct ctl_table root_table[]; |
e51b6ba0 EB |
195 | static struct ctl_table_root sysctl_table_root; |
196 | static struct ctl_table_header root_table_header = { | |
b380b0d4 | 197 | .count = 1, |
e51b6ba0 | 198 | .ctl_table = root_table, |
73455092 | 199 | .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list), |
e51b6ba0 | 200 | .root = &sysctl_table_root, |
73455092 | 201 | .set = &sysctl_table_root.default_set, |
e51b6ba0 EB |
202 | }; |
203 | static struct ctl_table_root sysctl_table_root = { | |
204 | .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list), | |
73455092 | 205 | .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry), |
e51b6ba0 | 206 | }; |
1da177e4 | 207 | |
d8217f07 EB |
208 | static struct ctl_table kern_table[]; |
209 | static struct ctl_table vm_table[]; | |
210 | static struct ctl_table fs_table[]; | |
211 | static struct ctl_table debug_table[]; | |
212 | static struct ctl_table dev_table[]; | |
213 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
214 | #ifdef CONFIG_EPOLL |
215 | extern struct ctl_table epoll_table[]; | |
216 | #endif | |
1da177e4 LT |
217 | |
218 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
219 | int sysctl_legacy_va_layout; | |
220 | #endif | |
221 | ||
1da177e4 LT |
222 | /* The default sysctl tables: */ |
223 | ||
d8217f07 | 224 | static struct ctl_table root_table[] = { |
1da177e4 | 225 | { |
1da177e4 LT |
226 | .procname = "kernel", |
227 | .mode = 0555, | |
228 | .child = kern_table, | |
229 | }, | |
230 | { | |
1da177e4 LT |
231 | .procname = "vm", |
232 | .mode = 0555, | |
233 | .child = vm_table, | |
234 | }, | |
1da177e4 | 235 | { |
1da177e4 LT |
236 | .procname = "fs", |
237 | .mode = 0555, | |
238 | .child = fs_table, | |
239 | }, | |
240 | { | |
1da177e4 LT |
241 | .procname = "debug", |
242 | .mode = 0555, | |
243 | .child = debug_table, | |
244 | }, | |
245 | { | |
1da177e4 LT |
246 | .procname = "dev", |
247 | .mode = 0555, | |
248 | .child = dev_table, | |
249 | }, | |
6fce56ec | 250 | { } |
1da177e4 LT |
251 | }; |
252 | ||
77e54a1f | 253 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
254 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
255 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
256 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
257 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
1983a922 CE |
258 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
259 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
77e54a1f IM |
260 | #endif |
261 | ||
5e771905 MG |
262 | #ifdef CONFIG_COMPACTION |
263 | static int min_extfrag_threshold; | |
264 | static int max_extfrag_threshold = 1000; | |
265 | #endif | |
266 | ||
d8217f07 | 267 | static struct ctl_table kern_table[] = { |
2bba22c5 | 268 | { |
2bba22c5 MG |
269 | .procname = "sched_child_runs_first", |
270 | .data = &sysctl_sched_child_runs_first, | |
271 | .maxlen = sizeof(unsigned int), | |
272 | .mode = 0644, | |
6d456111 | 273 | .proc_handler = proc_dointvec, |
2bba22c5 | 274 | }, |
77e54a1f IM |
275 | #ifdef CONFIG_SCHED_DEBUG |
276 | { | |
b2be5e96 PZ |
277 | .procname = "sched_min_granularity_ns", |
278 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
279 | .maxlen = sizeof(unsigned int), |
280 | .mode = 0644, | |
702a7c76 | 281 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
282 | .extra1 = &min_sched_granularity_ns, |
283 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 284 | }, |
21805085 | 285 | { |
21805085 PZ |
286 | .procname = "sched_latency_ns", |
287 | .data = &sysctl_sched_latency, | |
288 | .maxlen = sizeof(unsigned int), | |
289 | .mode = 0644, | |
702a7c76 | 290 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
291 | .extra1 = &min_sched_granularity_ns, |
292 | .extra2 = &max_sched_granularity_ns, | |
293 | }, | |
77e54a1f | 294 | { |
77e54a1f IM |
295 | .procname = "sched_wakeup_granularity_ns", |
296 | .data = &sysctl_sched_wakeup_granularity, | |
297 | .maxlen = sizeof(unsigned int), | |
298 | .mode = 0644, | |
702a7c76 | 299 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
300 | .extra1 = &min_wakeup_granularity_ns, |
301 | .extra2 = &max_wakeup_granularity_ns, | |
302 | }, | |
1983a922 | 303 | { |
1983a922 CE |
304 | .procname = "sched_tunable_scaling", |
305 | .data = &sysctl_sched_tunable_scaling, | |
306 | .maxlen = sizeof(enum sched_tunable_scaling), | |
307 | .mode = 0644, | |
702a7c76 | 308 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
309 | .extra1 = &min_sched_tunable_scaling, |
310 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 311 | }, |
da84d961 | 312 | { |
da84d961 IM |
313 | .procname = "sched_migration_cost", |
314 | .data = &sysctl_sched_migration_cost, | |
315 | .maxlen = sizeof(unsigned int), | |
316 | .mode = 0644, | |
6d456111 | 317 | .proc_handler = proc_dointvec, |
da84d961 | 318 | }, |
b82d9fdd | 319 | { |
b82d9fdd PZ |
320 | .procname = "sched_nr_migrate", |
321 | .data = &sysctl_sched_nr_migrate, | |
322 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 323 | .mode = 0644, |
6d456111 | 324 | .proc_handler = proc_dointvec, |
fa85ae24 | 325 | }, |
e9e9250b | 326 | { |
e9e9250b PZ |
327 | .procname = "sched_time_avg", |
328 | .data = &sysctl_sched_time_avg, | |
329 | .maxlen = sizeof(unsigned int), | |
330 | .mode = 0644, | |
6d456111 | 331 | .proc_handler = proc_dointvec, |
e9e9250b | 332 | }, |
a7a4f8a7 PT |
333 | { |
334 | .procname = "sched_shares_window", | |
335 | .data = &sysctl_sched_shares_window, | |
336 | .maxlen = sizeof(unsigned int), | |
337 | .mode = 0644, | |
338 | .proc_handler = proc_dointvec, | |
339 | }, | |
cd1bb94b | 340 | { |
cd1bb94b AB |
341 | .procname = "timer_migration", |
342 | .data = &sysctl_timer_migration, | |
343 | .maxlen = sizeof(unsigned int), | |
344 | .mode = 0644, | |
6d456111 | 345 | .proc_handler = proc_dointvec_minmax, |
bfdb4d9f AB |
346 | .extra1 = &zero, |
347 | .extra2 = &one, | |
fa85ae24 | 348 | }, |
1fc84aaa | 349 | #endif |
9f0c1e56 | 350 | { |
9f0c1e56 PZ |
351 | .procname = "sched_rt_period_us", |
352 | .data = &sysctl_sched_rt_period, | |
353 | .maxlen = sizeof(unsigned int), | |
354 | .mode = 0644, | |
6d456111 | 355 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
356 | }, |
357 | { | |
9f0c1e56 PZ |
358 | .procname = "sched_rt_runtime_us", |
359 | .data = &sysctl_sched_rt_runtime, | |
360 | .maxlen = sizeof(int), | |
361 | .mode = 0644, | |
6d456111 | 362 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 363 | }, |
1799e35d | 364 | { |
1799e35d IM |
365 | .procname = "sched_compat_yield", |
366 | .data = &sysctl_sched_compat_yield, | |
367 | .maxlen = sizeof(unsigned int), | |
368 | .mode = 0644, | |
6d456111 | 369 | .proc_handler = proc_dointvec, |
1799e35d | 370 | }, |
5091faa4 MG |
371 | #ifdef CONFIG_SCHED_AUTOGROUP |
372 | { | |
373 | .procname = "sched_autogroup_enabled", | |
374 | .data = &sysctl_sched_autogroup_enabled, | |
375 | .maxlen = sizeof(unsigned int), | |
376 | .mode = 0644, | |
377 | .proc_handler = proc_dointvec, | |
378 | .extra1 = &zero, | |
379 | .extra2 = &one, | |
380 | }, | |
381 | #endif | |
f20786ff PZ |
382 | #ifdef CONFIG_PROVE_LOCKING |
383 | { | |
f20786ff PZ |
384 | .procname = "prove_locking", |
385 | .data = &prove_locking, | |
386 | .maxlen = sizeof(int), | |
387 | .mode = 0644, | |
6d456111 | 388 | .proc_handler = proc_dointvec, |
f20786ff PZ |
389 | }, |
390 | #endif | |
391 | #ifdef CONFIG_LOCK_STAT | |
392 | { | |
f20786ff PZ |
393 | .procname = "lock_stat", |
394 | .data = &lock_stat, | |
395 | .maxlen = sizeof(int), | |
396 | .mode = 0644, | |
6d456111 | 397 | .proc_handler = proc_dointvec, |
f20786ff | 398 | }, |
77e54a1f | 399 | #endif |
1da177e4 | 400 | { |
1da177e4 LT |
401 | .procname = "panic", |
402 | .data = &panic_timeout, | |
403 | .maxlen = sizeof(int), | |
404 | .mode = 0644, | |
6d456111 | 405 | .proc_handler = proc_dointvec, |
1da177e4 LT |
406 | }, |
407 | { | |
1da177e4 LT |
408 | .procname = "core_uses_pid", |
409 | .data = &core_uses_pid, | |
410 | .maxlen = sizeof(int), | |
411 | .mode = 0644, | |
6d456111 | 412 | .proc_handler = proc_dointvec, |
1da177e4 LT |
413 | }, |
414 | { | |
1da177e4 LT |
415 | .procname = "core_pattern", |
416 | .data = core_pattern, | |
71ce92f3 | 417 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 418 | .mode = 0644, |
6d456111 | 419 | .proc_handler = proc_dostring, |
1da177e4 | 420 | }, |
a293980c | 421 | { |
a293980c NH |
422 | .procname = "core_pipe_limit", |
423 | .data = &core_pipe_limit, | |
424 | .maxlen = sizeof(unsigned int), | |
425 | .mode = 0644, | |
6d456111 | 426 | .proc_handler = proc_dointvec, |
a293980c | 427 | }, |
34f5a398 | 428 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 429 | { |
1da177e4 | 430 | .procname = "tainted", |
25ddbb18 | 431 | .maxlen = sizeof(long), |
34f5a398 | 432 | .mode = 0644, |
6d456111 | 433 | .proc_handler = proc_taint, |
1da177e4 | 434 | }, |
34f5a398 | 435 | #endif |
9745512c AV |
436 | #ifdef CONFIG_LATENCYTOP |
437 | { | |
438 | .procname = "latencytop", | |
439 | .data = &latencytop_enabled, | |
440 | .maxlen = sizeof(int), | |
441 | .mode = 0644, | |
6d456111 | 442 | .proc_handler = proc_dointvec, |
9745512c AV |
443 | }, |
444 | #endif | |
1da177e4 LT |
445 | #ifdef CONFIG_BLK_DEV_INITRD |
446 | { | |
1da177e4 LT |
447 | .procname = "real-root-dev", |
448 | .data = &real_root_dev, | |
449 | .maxlen = sizeof(int), | |
450 | .mode = 0644, | |
6d456111 | 451 | .proc_handler = proc_dointvec, |
1da177e4 LT |
452 | }, |
453 | #endif | |
45807a1d | 454 | { |
45807a1d IM |
455 | .procname = "print-fatal-signals", |
456 | .data = &print_fatal_signals, | |
457 | .maxlen = sizeof(int), | |
458 | .mode = 0644, | |
6d456111 | 459 | .proc_handler = proc_dointvec, |
45807a1d | 460 | }, |
72c57ed5 | 461 | #ifdef CONFIG_SPARC |
1da177e4 | 462 | { |
1da177e4 LT |
463 | .procname = "reboot-cmd", |
464 | .data = reboot_command, | |
465 | .maxlen = 256, | |
466 | .mode = 0644, | |
6d456111 | 467 | .proc_handler = proc_dostring, |
1da177e4 LT |
468 | }, |
469 | { | |
1da177e4 LT |
470 | .procname = "stop-a", |
471 | .data = &stop_a_enabled, | |
472 | .maxlen = sizeof (int), | |
473 | .mode = 0644, | |
6d456111 | 474 | .proc_handler = proc_dointvec, |
1da177e4 LT |
475 | }, |
476 | { | |
1da177e4 LT |
477 | .procname = "scons-poweroff", |
478 | .data = &scons_pwroff, | |
479 | .maxlen = sizeof (int), | |
480 | .mode = 0644, | |
6d456111 | 481 | .proc_handler = proc_dointvec, |
1da177e4 LT |
482 | }, |
483 | #endif | |
0871420f DM |
484 | #ifdef CONFIG_SPARC64 |
485 | { | |
0871420f DM |
486 | .procname = "tsb-ratio", |
487 | .data = &sysctl_tsb_ratio, | |
488 | .maxlen = sizeof (int), | |
489 | .mode = 0644, | |
6d456111 | 490 | .proc_handler = proc_dointvec, |
0871420f DM |
491 | }, |
492 | #endif | |
1da177e4 LT |
493 | #ifdef __hppa__ |
494 | { | |
1da177e4 LT |
495 | .procname = "soft-power", |
496 | .data = &pwrsw_enabled, | |
497 | .maxlen = sizeof (int), | |
498 | .mode = 0644, | |
6d456111 | 499 | .proc_handler = proc_dointvec, |
1da177e4 LT |
500 | }, |
501 | { | |
1da177e4 LT |
502 | .procname = "unaligned-trap", |
503 | .data = &unaligned_enabled, | |
504 | .maxlen = sizeof (int), | |
505 | .mode = 0644, | |
6d456111 | 506 | .proc_handler = proc_dointvec, |
1da177e4 LT |
507 | }, |
508 | #endif | |
509 | { | |
1da177e4 LT |
510 | .procname = "ctrl-alt-del", |
511 | .data = &C_A_D, | |
512 | .maxlen = sizeof(int), | |
513 | .mode = 0644, | |
6d456111 | 514 | .proc_handler = proc_dointvec, |
1da177e4 | 515 | }, |
606576ce | 516 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 517 | { |
b0fc494f SR |
518 | .procname = "ftrace_enabled", |
519 | .data = &ftrace_enabled, | |
520 | .maxlen = sizeof(int), | |
521 | .mode = 0644, | |
6d456111 | 522 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
523 | }, |
524 | #endif | |
f38f1d2a SR |
525 | #ifdef CONFIG_STACK_TRACER |
526 | { | |
f38f1d2a SR |
527 | .procname = "stack_tracer_enabled", |
528 | .data = &stack_tracer_enabled, | |
529 | .maxlen = sizeof(int), | |
530 | .mode = 0644, | |
6d456111 | 531 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
532 | }, |
533 | #endif | |
944ac425 SR |
534 | #ifdef CONFIG_TRACING |
535 | { | |
3299b4dd | 536 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
537 | .data = &ftrace_dump_on_oops, |
538 | .maxlen = sizeof(int), | |
539 | .mode = 0644, | |
6d456111 | 540 | .proc_handler = proc_dointvec, |
944ac425 SR |
541 | }, |
542 | #endif | |
a1ef5adb | 543 | #ifdef CONFIG_MODULES |
1da177e4 | 544 | { |
1da177e4 LT |
545 | .procname = "modprobe", |
546 | .data = &modprobe_path, | |
547 | .maxlen = KMOD_PATH_LEN, | |
548 | .mode = 0644, | |
6d456111 | 549 | .proc_handler = proc_dostring, |
1da177e4 | 550 | }, |
3d43321b | 551 | { |
3d43321b KC |
552 | .procname = "modules_disabled", |
553 | .data = &modules_disabled, | |
554 | .maxlen = sizeof(int), | |
555 | .mode = 0644, | |
556 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 557 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
558 | .extra1 = &one, |
559 | .extra2 = &one, | |
560 | }, | |
1da177e4 | 561 | #endif |
94f17cd7 | 562 | #ifdef CONFIG_HOTPLUG |
1da177e4 | 563 | { |
1da177e4 | 564 | .procname = "hotplug", |
312c004d KS |
565 | .data = &uevent_helper, |
566 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 567 | .mode = 0644, |
6d456111 | 568 | .proc_handler = proc_dostring, |
1da177e4 LT |
569 | }, |
570 | #endif | |
571 | #ifdef CONFIG_CHR_DEV_SG | |
572 | { | |
1da177e4 LT |
573 | .procname = "sg-big-buff", |
574 | .data = &sg_big_buff, | |
575 | .maxlen = sizeof (int), | |
576 | .mode = 0444, | |
6d456111 | 577 | .proc_handler = proc_dointvec, |
1da177e4 LT |
578 | }, |
579 | #endif | |
580 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
581 | { | |
1da177e4 LT |
582 | .procname = "acct", |
583 | .data = &acct_parm, | |
584 | .maxlen = 3*sizeof(int), | |
585 | .mode = 0644, | |
6d456111 | 586 | .proc_handler = proc_dointvec, |
1da177e4 LT |
587 | }, |
588 | #endif | |
1da177e4 LT |
589 | #ifdef CONFIG_MAGIC_SYSRQ |
590 | { | |
1da177e4 | 591 | .procname = "sysrq", |
5d6f647f | 592 | .data = &__sysrq_enabled, |
1da177e4 LT |
593 | .maxlen = sizeof (int), |
594 | .mode = 0644, | |
97f5f0cd | 595 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
596 | }, |
597 | #endif | |
d6f8ff73 | 598 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 599 | { |
1da177e4 | 600 | .procname = "cad_pid", |
9ec52099 | 601 | .data = NULL, |
1da177e4 LT |
602 | .maxlen = sizeof (int), |
603 | .mode = 0600, | |
6d456111 | 604 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 605 | }, |
d6f8ff73 | 606 | #endif |
1da177e4 | 607 | { |
1da177e4 LT |
608 | .procname = "threads-max", |
609 | .data = &max_threads, | |
610 | .maxlen = sizeof(int), | |
611 | .mode = 0644, | |
6d456111 | 612 | .proc_handler = proc_dointvec, |
1da177e4 LT |
613 | }, |
614 | { | |
1da177e4 LT |
615 | .procname = "random", |
616 | .mode = 0555, | |
617 | .child = random_table, | |
618 | }, | |
1da177e4 | 619 | { |
1da177e4 LT |
620 | .procname = "overflowuid", |
621 | .data = &overflowuid, | |
622 | .maxlen = sizeof(int), | |
623 | .mode = 0644, | |
6d456111 | 624 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
625 | .extra1 = &minolduid, |
626 | .extra2 = &maxolduid, | |
627 | }, | |
628 | { | |
1da177e4 LT |
629 | .procname = "overflowgid", |
630 | .data = &overflowgid, | |
631 | .maxlen = sizeof(int), | |
632 | .mode = 0644, | |
6d456111 | 633 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
634 | .extra1 = &minolduid, |
635 | .extra2 = &maxolduid, | |
636 | }, | |
347a8dc3 | 637 | #ifdef CONFIG_S390 |
1da177e4 LT |
638 | #ifdef CONFIG_MATHEMU |
639 | { | |
1da177e4 LT |
640 | .procname = "ieee_emulation_warnings", |
641 | .data = &sysctl_ieee_emulation_warnings, | |
642 | .maxlen = sizeof(int), | |
643 | .mode = 0644, | |
6d456111 | 644 | .proc_handler = proc_dointvec, |
1da177e4 | 645 | }, |
1da177e4 LT |
646 | #endif |
647 | { | |
1da177e4 | 648 | .procname = "userprocess_debug", |
ab3c68ee | 649 | .data = &show_unhandled_signals, |
1da177e4 LT |
650 | .maxlen = sizeof(int), |
651 | .mode = 0644, | |
6d456111 | 652 | .proc_handler = proc_dointvec, |
1da177e4 LT |
653 | }, |
654 | #endif | |
655 | { | |
1da177e4 LT |
656 | .procname = "pid_max", |
657 | .data = &pid_max, | |
658 | .maxlen = sizeof (int), | |
659 | .mode = 0644, | |
6d456111 | 660 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
661 | .extra1 = &pid_max_min, |
662 | .extra2 = &pid_max_max, | |
663 | }, | |
664 | { | |
1da177e4 LT |
665 | .procname = "panic_on_oops", |
666 | .data = &panic_on_oops, | |
667 | .maxlen = sizeof(int), | |
668 | .mode = 0644, | |
6d456111 | 669 | .proc_handler = proc_dointvec, |
1da177e4 | 670 | }, |
7ef3d2fd JP |
671 | #if defined CONFIG_PRINTK |
672 | { | |
7ef3d2fd JP |
673 | .procname = "printk", |
674 | .data = &console_loglevel, | |
675 | .maxlen = 4*sizeof(int), | |
676 | .mode = 0644, | |
6d456111 | 677 | .proc_handler = proc_dointvec, |
7ef3d2fd | 678 | }, |
1da177e4 | 679 | { |
1da177e4 | 680 | .procname = "printk_ratelimit", |
717115e1 | 681 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
682 | .maxlen = sizeof(int), |
683 | .mode = 0644, | |
6d456111 | 684 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
685 | }, |
686 | { | |
1da177e4 | 687 | .procname = "printk_ratelimit_burst", |
717115e1 | 688 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
689 | .maxlen = sizeof(int), |
690 | .mode = 0644, | |
6d456111 | 691 | .proc_handler = proc_dointvec, |
1da177e4 | 692 | }, |
af91322e | 693 | { |
af91322e DY |
694 | .procname = "printk_delay", |
695 | .data = &printk_delay_msec, | |
696 | .maxlen = sizeof(int), | |
697 | .mode = 0644, | |
6d456111 | 698 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
699 | .extra1 = &zero, |
700 | .extra2 = &ten_thousand, | |
701 | }, | |
eaf06b24 DR |
702 | { |
703 | .procname = "dmesg_restrict", | |
704 | .data = &dmesg_restrict, | |
705 | .maxlen = sizeof(int), | |
706 | .mode = 0644, | |
707 | .proc_handler = proc_dointvec_minmax, | |
708 | .extra1 = &zero, | |
709 | .extra2 = &one, | |
710 | }, | |
455cd5ab DR |
711 | { |
712 | .procname = "kptr_restrict", | |
713 | .data = &kptr_restrict, | |
714 | .maxlen = sizeof(int), | |
715 | .mode = 0644, | |
716 | .proc_handler = proc_dointvec_minmax, | |
717 | .extra1 = &zero, | |
718 | .extra2 = &two, | |
719 | }, | |
df6e61d4 | 720 | #endif |
1da177e4 | 721 | { |
1da177e4 LT |
722 | .procname = "ngroups_max", |
723 | .data = &ngroups_max, | |
724 | .maxlen = sizeof (int), | |
725 | .mode = 0444, | |
6d456111 | 726 | .proc_handler = proc_dointvec, |
1da177e4 | 727 | }, |
58687acb | 728 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 729 | { |
58687acb DZ |
730 | .procname = "watchdog", |
731 | .data = &watchdog_enabled, | |
504d7cf1 DZ |
732 | .maxlen = sizeof (int), |
733 | .mode = 0644, | |
58687acb DZ |
734 | .proc_handler = proc_dowatchdog_enabled, |
735 | }, | |
736 | { | |
737 | .procname = "watchdog_thresh", | |
738 | .data = &softlockup_thresh, | |
739 | .maxlen = sizeof(int), | |
740 | .mode = 0644, | |
741 | .proc_handler = proc_dowatchdog_thresh, | |
742 | .extra1 = &neg_one, | |
743 | .extra2 = &sixty, | |
504d7cf1 | 744 | }, |
2508ce18 DZ |
745 | { |
746 | .procname = "softlockup_panic", | |
747 | .data = &softlockup_panic, | |
748 | .maxlen = sizeof(int), | |
749 | .mode = 0644, | |
750 | .proc_handler = proc_dointvec_minmax, | |
751 | .extra1 = &zero, | |
752 | .extra2 = &one, | |
753 | }, | |
5dc30558 DZ |
754 | { |
755 | .procname = "nmi_watchdog", | |
756 | .data = &watchdog_enabled, | |
757 | .maxlen = sizeof (int), | |
758 | .mode = 0644, | |
759 | .proc_handler = proc_dowatchdog_enabled, | |
760 | }, | |
761 | #endif | |
762 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
763 | { | |
764 | .procname = "unknown_nmi_panic", | |
765 | .data = &unknown_nmi_panic, | |
766 | .maxlen = sizeof (int), | |
767 | .mode = 0644, | |
768 | .proc_handler = proc_dointvec, | |
769 | }, | |
504d7cf1 | 770 | #endif |
1da177e4 | 771 | #if defined(CONFIG_X86) |
8da5adda | 772 | { |
8da5adda DZ |
773 | .procname = "panic_on_unrecovered_nmi", |
774 | .data = &panic_on_unrecovered_nmi, | |
775 | .maxlen = sizeof(int), | |
776 | .mode = 0644, | |
6d456111 | 777 | .proc_handler = proc_dointvec, |
8da5adda | 778 | }, |
5211a242 | 779 | { |
5211a242 KG |
780 | .procname = "panic_on_io_nmi", |
781 | .data = &panic_on_io_nmi, | |
782 | .maxlen = sizeof(int), | |
783 | .mode = 0644, | |
6d456111 | 784 | .proc_handler = proc_dointvec, |
5211a242 | 785 | }, |
1da177e4 | 786 | { |
1da177e4 LT |
787 | .procname = "bootloader_type", |
788 | .data = &bootloader_type, | |
789 | .maxlen = sizeof (int), | |
790 | .mode = 0444, | |
6d456111 | 791 | .proc_handler = proc_dointvec, |
1da177e4 | 792 | }, |
5031296c | 793 | { |
5031296c PA |
794 | .procname = "bootloader_version", |
795 | .data = &bootloader_version, | |
796 | .maxlen = sizeof (int), | |
797 | .mode = 0444, | |
6d456111 | 798 | .proc_handler = proc_dointvec, |
5031296c | 799 | }, |
0741f4d2 | 800 | { |
0741f4d2 CE |
801 | .procname = "kstack_depth_to_print", |
802 | .data = &kstack_depth_to_print, | |
803 | .maxlen = sizeof(int), | |
804 | .mode = 0644, | |
6d456111 | 805 | .proc_handler = proc_dointvec, |
0741f4d2 | 806 | }, |
6e7c4025 | 807 | { |
6e7c4025 IM |
808 | .procname = "io_delay_type", |
809 | .data = &io_delay_type, | |
810 | .maxlen = sizeof(int), | |
811 | .mode = 0644, | |
6d456111 | 812 | .proc_handler = proc_dointvec, |
6e7c4025 | 813 | }, |
1da177e4 | 814 | #endif |
7a9166e3 | 815 | #if defined(CONFIG_MMU) |
1da177e4 | 816 | { |
1da177e4 LT |
817 | .procname = "randomize_va_space", |
818 | .data = &randomize_va_space, | |
819 | .maxlen = sizeof(int), | |
820 | .mode = 0644, | |
6d456111 | 821 | .proc_handler = proc_dointvec, |
1da177e4 | 822 | }, |
7a9166e3 | 823 | #endif |
0152fb37 | 824 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 825 | { |
951f22d5 MS |
826 | .procname = "spin_retry", |
827 | .data = &spin_retry, | |
828 | .maxlen = sizeof (int), | |
829 | .mode = 0644, | |
6d456111 | 830 | .proc_handler = proc_dointvec, |
951f22d5 | 831 | }, |
c255d844 | 832 | #endif |
673d5b43 | 833 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 834 | { |
c255d844 | 835 | .procname = "acpi_video_flags", |
77afcf78 | 836 | .data = &acpi_realmode_flags, |
c255d844 PM |
837 | .maxlen = sizeof (unsigned long), |
838 | .mode = 0644, | |
6d456111 | 839 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 840 | }, |
d2b176ed JS |
841 | #endif |
842 | #ifdef CONFIG_IA64 | |
843 | { | |
d2b176ed JS |
844 | .procname = "ignore-unaligned-usertrap", |
845 | .data = &no_unaligned_warning, | |
846 | .maxlen = sizeof (int), | |
847 | .mode = 0644, | |
6d456111 | 848 | .proc_handler = proc_dointvec, |
d2b176ed | 849 | }, |
88fc241f | 850 | { |
88fc241f DC |
851 | .procname = "unaligned-dump-stack", |
852 | .data = &unaligned_dump_stack, | |
853 | .maxlen = sizeof (int), | |
854 | .mode = 0644, | |
6d456111 | 855 | .proc_handler = proc_dointvec, |
88fc241f | 856 | }, |
bebfa101 | 857 | #endif |
e162b39a MSB |
858 | #ifdef CONFIG_DETECT_HUNG_TASK |
859 | { | |
e162b39a MSB |
860 | .procname = "hung_task_panic", |
861 | .data = &sysctl_hung_task_panic, | |
862 | .maxlen = sizeof(int), | |
863 | .mode = 0644, | |
6d456111 | 864 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
865 | .extra1 = &zero, |
866 | .extra2 = &one, | |
867 | }, | |
82a1fcb9 | 868 | { |
82a1fcb9 IM |
869 | .procname = "hung_task_check_count", |
870 | .data = &sysctl_hung_task_check_count, | |
90739081 | 871 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 872 | .mode = 0644, |
6d456111 | 873 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 IM |
874 | }, |
875 | { | |
82a1fcb9 IM |
876 | .procname = "hung_task_timeout_secs", |
877 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 878 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 879 | .mode = 0644, |
6d456111 | 880 | .proc_handler = proc_dohung_task_timeout_secs, |
82a1fcb9 IM |
881 | }, |
882 | { | |
82a1fcb9 IM |
883 | .procname = "hung_task_warnings", |
884 | .data = &sysctl_hung_task_warnings, | |
90739081 | 885 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 886 | .mode = 0644, |
6d456111 | 887 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 | 888 | }, |
c4f3b63f | 889 | #endif |
bebfa101 AK |
890 | #ifdef CONFIG_COMPAT |
891 | { | |
bebfa101 AK |
892 | .procname = "compat-log", |
893 | .data = &compat_log, | |
894 | .maxlen = sizeof (int), | |
895 | .mode = 0644, | |
6d456111 | 896 | .proc_handler = proc_dointvec, |
bebfa101 | 897 | }, |
951f22d5 | 898 | #endif |
23f78d4a IM |
899 | #ifdef CONFIG_RT_MUTEXES |
900 | { | |
23f78d4a IM |
901 | .procname = "max_lock_depth", |
902 | .data = &max_lock_depth, | |
903 | .maxlen = sizeof(int), | |
904 | .mode = 0644, | |
6d456111 | 905 | .proc_handler = proc_dointvec, |
23f78d4a | 906 | }, |
5096add8 | 907 | #endif |
10a0a8d4 | 908 | { |
10a0a8d4 JF |
909 | .procname = "poweroff_cmd", |
910 | .data = &poweroff_cmd, | |
911 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
912 | .mode = 0644, | |
6d456111 | 913 | .proc_handler = proc_dostring, |
10a0a8d4 | 914 | }, |
0b77f5bf DH |
915 | #ifdef CONFIG_KEYS |
916 | { | |
0b77f5bf DH |
917 | .procname = "keys", |
918 | .mode = 0555, | |
919 | .child = key_sysctls, | |
920 | }, | |
921 | #endif | |
31a72bce PM |
922 | #ifdef CONFIG_RCU_TORTURE_TEST |
923 | { | |
31a72bce PM |
924 | .procname = "rcutorture_runnable", |
925 | .data = &rcutorture_runnable, | |
926 | .maxlen = sizeof(int), | |
927 | .mode = 0644, | |
6d456111 | 928 | .proc_handler = proc_dointvec, |
31a72bce PM |
929 | }, |
930 | #endif | |
cdd6c482 | 931 | #ifdef CONFIG_PERF_EVENTS |
1ccd1549 | 932 | { |
cdd6c482 IM |
933 | .procname = "perf_event_paranoid", |
934 | .data = &sysctl_perf_event_paranoid, | |
935 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 936 | .mode = 0644, |
6d456111 | 937 | .proc_handler = proc_dointvec, |
1ccd1549 | 938 | }, |
c5078f78 | 939 | { |
cdd6c482 IM |
940 | .procname = "perf_event_mlock_kb", |
941 | .data = &sysctl_perf_event_mlock, | |
942 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 943 | .mode = 0644, |
6d456111 | 944 | .proc_handler = proc_dointvec, |
c5078f78 | 945 | }, |
a78ac325 | 946 | { |
cdd6c482 IM |
947 | .procname = "perf_event_max_sample_rate", |
948 | .data = &sysctl_perf_event_sample_rate, | |
949 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 950 | .mode = 0644, |
163ec435 | 951 | .proc_handler = perf_proc_update_handler, |
a78ac325 | 952 | }, |
1ccd1549 | 953 | #endif |
dfec072e VN |
954 | #ifdef CONFIG_KMEMCHECK |
955 | { | |
dfec072e VN |
956 | .procname = "kmemcheck", |
957 | .data = &kmemcheck_enabled, | |
958 | .maxlen = sizeof(int), | |
959 | .mode = 0644, | |
6d456111 | 960 | .proc_handler = proc_dointvec, |
dfec072e VN |
961 | }, |
962 | #endif | |
cb684b5b | 963 | #ifdef CONFIG_BLOCK |
5e605b64 | 964 | { |
5e605b64 JA |
965 | .procname = "blk_iopoll", |
966 | .data = &blk_iopoll_enabled, | |
967 | .maxlen = sizeof(int), | |
968 | .mode = 0644, | |
6d456111 | 969 | .proc_handler = proc_dointvec, |
5e605b64 | 970 | }, |
cb684b5b | 971 | #endif |
6fce56ec | 972 | { } |
1da177e4 LT |
973 | }; |
974 | ||
d8217f07 | 975 | static struct ctl_table vm_table[] = { |
1da177e4 | 976 | { |
1da177e4 LT |
977 | .procname = "overcommit_memory", |
978 | .data = &sysctl_overcommit_memory, | |
979 | .maxlen = sizeof(sysctl_overcommit_memory), | |
980 | .mode = 0644, | |
6d456111 | 981 | .proc_handler = proc_dointvec, |
1da177e4 | 982 | }, |
fadd8fbd | 983 | { |
fadd8fbd KH |
984 | .procname = "panic_on_oom", |
985 | .data = &sysctl_panic_on_oom, | |
986 | .maxlen = sizeof(sysctl_panic_on_oom), | |
987 | .mode = 0644, | |
6d456111 | 988 | .proc_handler = proc_dointvec, |
fadd8fbd | 989 | }, |
fe071d7e | 990 | { |
fe071d7e DR |
991 | .procname = "oom_kill_allocating_task", |
992 | .data = &sysctl_oom_kill_allocating_task, | |
993 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
994 | .mode = 0644, | |
6d456111 | 995 | .proc_handler = proc_dointvec, |
fe071d7e | 996 | }, |
fef1bdd6 | 997 | { |
fef1bdd6 DR |
998 | .procname = "oom_dump_tasks", |
999 | .data = &sysctl_oom_dump_tasks, | |
1000 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1001 | .mode = 0644, | |
6d456111 | 1002 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1003 | }, |
1da177e4 | 1004 | { |
1da177e4 LT |
1005 | .procname = "overcommit_ratio", |
1006 | .data = &sysctl_overcommit_ratio, | |
1007 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1008 | .mode = 0644, | |
6d456111 | 1009 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1010 | }, |
1011 | { | |
1da177e4 LT |
1012 | .procname = "page-cluster", |
1013 | .data = &page_cluster, | |
1014 | .maxlen = sizeof(int), | |
1015 | .mode = 0644, | |
6d456111 | 1016 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1017 | }, |
1018 | { | |
1da177e4 LT |
1019 | .procname = "dirty_background_ratio", |
1020 | .data = &dirty_background_ratio, | |
1021 | .maxlen = sizeof(dirty_background_ratio), | |
1022 | .mode = 0644, | |
6d456111 | 1023 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1024 | .extra1 = &zero, |
1025 | .extra2 = &one_hundred, | |
1026 | }, | |
2da02997 | 1027 | { |
2da02997 DR |
1028 | .procname = "dirty_background_bytes", |
1029 | .data = &dirty_background_bytes, | |
1030 | .maxlen = sizeof(dirty_background_bytes), | |
1031 | .mode = 0644, | |
6d456111 | 1032 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1033 | .extra1 = &one_ul, |
2da02997 | 1034 | }, |
1da177e4 | 1035 | { |
1da177e4 LT |
1036 | .procname = "dirty_ratio", |
1037 | .data = &vm_dirty_ratio, | |
1038 | .maxlen = sizeof(vm_dirty_ratio), | |
1039 | .mode = 0644, | |
6d456111 | 1040 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1041 | .extra1 = &zero, |
1042 | .extra2 = &one_hundred, | |
1043 | }, | |
2da02997 | 1044 | { |
2da02997 DR |
1045 | .procname = "dirty_bytes", |
1046 | .data = &vm_dirty_bytes, | |
1047 | .maxlen = sizeof(vm_dirty_bytes), | |
1048 | .mode = 0644, | |
6d456111 | 1049 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1050 | .extra1 = &dirty_bytes_min, |
2da02997 | 1051 | }, |
1da177e4 | 1052 | { |
1da177e4 | 1053 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1054 | .data = &dirty_writeback_interval, |
1055 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1056 | .mode = 0644, |
6d456111 | 1057 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1058 | }, |
1059 | { | |
1da177e4 | 1060 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1061 | .data = &dirty_expire_interval, |
1062 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1063 | .mode = 0644, |
6d456111 | 1064 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1065 | }, |
1066 | { | |
1da177e4 LT |
1067 | .procname = "nr_pdflush_threads", |
1068 | .data = &nr_pdflush_threads, | |
1069 | .maxlen = sizeof nr_pdflush_threads, | |
1070 | .mode = 0444 /* read-only*/, | |
6d456111 | 1071 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1072 | }, |
1073 | { | |
1da177e4 LT |
1074 | .procname = "swappiness", |
1075 | .data = &vm_swappiness, | |
1076 | .maxlen = sizeof(vm_swappiness), | |
1077 | .mode = 0644, | |
6d456111 | 1078 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1079 | .extra1 = &zero, |
1080 | .extra2 = &one_hundred, | |
1081 | }, | |
1082 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1083 | { |
1da177e4 | 1084 | .procname = "nr_hugepages", |
e5ff2159 | 1085 | .data = NULL, |
1da177e4 LT |
1086 | .maxlen = sizeof(unsigned long), |
1087 | .mode = 0644, | |
6d456111 | 1088 | .proc_handler = hugetlb_sysctl_handler, |
1da177e4 LT |
1089 | .extra1 = (void *)&hugetlb_zero, |
1090 | .extra2 = (void *)&hugetlb_infinity, | |
06808b08 LS |
1091 | }, |
1092 | #ifdef CONFIG_NUMA | |
1093 | { | |
1094 | .procname = "nr_hugepages_mempolicy", | |
1095 | .data = NULL, | |
1096 | .maxlen = sizeof(unsigned long), | |
1097 | .mode = 0644, | |
1098 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
1099 | .extra1 = (void *)&hugetlb_zero, | |
1100 | .extra2 = (void *)&hugetlb_infinity, | |
1101 | }, | |
1102 | #endif | |
1da177e4 | 1103 | { |
1da177e4 LT |
1104 | .procname = "hugetlb_shm_group", |
1105 | .data = &sysctl_hugetlb_shm_group, | |
1106 | .maxlen = sizeof(gid_t), | |
1107 | .mode = 0644, | |
6d456111 | 1108 | .proc_handler = proc_dointvec, |
1da177e4 | 1109 | }, |
396faf03 | 1110 | { |
396faf03 MG |
1111 | .procname = "hugepages_treat_as_movable", |
1112 | .data = &hugepages_treat_as_movable, | |
1113 | .maxlen = sizeof(int), | |
1114 | .mode = 0644, | |
6d456111 | 1115 | .proc_handler = hugetlb_treat_movable_handler, |
396faf03 | 1116 | }, |
d1c3fb1f | 1117 | { |
d1c3fb1f | 1118 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1119 | .data = NULL, |
1120 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1121 | .mode = 0644, |
6d456111 | 1122 | .proc_handler = hugetlb_overcommit_handler, |
e5ff2159 AK |
1123 | .extra1 = (void *)&hugetlb_zero, |
1124 | .extra2 = (void *)&hugetlb_infinity, | |
d1c3fb1f | 1125 | }, |
1da177e4 LT |
1126 | #endif |
1127 | { | |
1da177e4 LT |
1128 | .procname = "lowmem_reserve_ratio", |
1129 | .data = &sysctl_lowmem_reserve_ratio, | |
1130 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1131 | .mode = 0644, | |
6d456111 | 1132 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1133 | }, |
9d0243bc | 1134 | { |
9d0243bc AM |
1135 | .procname = "drop_caches", |
1136 | .data = &sysctl_drop_caches, | |
1137 | .maxlen = sizeof(int), | |
1138 | .mode = 0644, | |
1139 | .proc_handler = drop_caches_sysctl_handler, | |
9d0243bc | 1140 | }, |
76ab0f53 MG |
1141 | #ifdef CONFIG_COMPACTION |
1142 | { | |
1143 | .procname = "compact_memory", | |
1144 | .data = &sysctl_compact_memory, | |
1145 | .maxlen = sizeof(int), | |
1146 | .mode = 0200, | |
1147 | .proc_handler = sysctl_compaction_handler, | |
1148 | }, | |
5e771905 MG |
1149 | { |
1150 | .procname = "extfrag_threshold", | |
1151 | .data = &sysctl_extfrag_threshold, | |
1152 | .maxlen = sizeof(int), | |
1153 | .mode = 0644, | |
1154 | .proc_handler = sysctl_extfrag_handler, | |
1155 | .extra1 = &min_extfrag_threshold, | |
1156 | .extra2 = &max_extfrag_threshold, | |
1157 | }, | |
1158 | ||
76ab0f53 | 1159 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1160 | { |
1da177e4 LT |
1161 | .procname = "min_free_kbytes", |
1162 | .data = &min_free_kbytes, | |
1163 | .maxlen = sizeof(min_free_kbytes), | |
1164 | .mode = 0644, | |
6d456111 | 1165 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1166 | .extra1 = &zero, |
1167 | }, | |
8ad4b1fb | 1168 | { |
8ad4b1fb RS |
1169 | .procname = "percpu_pagelist_fraction", |
1170 | .data = &percpu_pagelist_fraction, | |
1171 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1172 | .mode = 0644, | |
6d456111 | 1173 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
8ad4b1fb RS |
1174 | .extra1 = &min_percpu_pagelist_fract, |
1175 | }, | |
1da177e4 LT |
1176 | #ifdef CONFIG_MMU |
1177 | { | |
1da177e4 LT |
1178 | .procname = "max_map_count", |
1179 | .data = &sysctl_max_map_count, | |
1180 | .maxlen = sizeof(sysctl_max_map_count), | |
1181 | .mode = 0644, | |
3e26120c | 1182 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1183 | .extra1 = &zero, |
1da177e4 | 1184 | }, |
dd8632a1 PM |
1185 | #else |
1186 | { | |
dd8632a1 PM |
1187 | .procname = "nr_trim_pages", |
1188 | .data = &sysctl_nr_trim_pages, | |
1189 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1190 | .mode = 0644, | |
6d456111 | 1191 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1192 | .extra1 = &zero, |
1193 | }, | |
1da177e4 LT |
1194 | #endif |
1195 | { | |
1da177e4 LT |
1196 | .procname = "laptop_mode", |
1197 | .data = &laptop_mode, | |
1198 | .maxlen = sizeof(laptop_mode), | |
1199 | .mode = 0644, | |
6d456111 | 1200 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1201 | }, |
1202 | { | |
1da177e4 LT |
1203 | .procname = "block_dump", |
1204 | .data = &block_dump, | |
1205 | .maxlen = sizeof(block_dump), | |
1206 | .mode = 0644, | |
6d456111 | 1207 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1208 | .extra1 = &zero, |
1209 | }, | |
1210 | { | |
1da177e4 LT |
1211 | .procname = "vfs_cache_pressure", |
1212 | .data = &sysctl_vfs_cache_pressure, | |
1213 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1214 | .mode = 0644, | |
6d456111 | 1215 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1216 | .extra1 = &zero, |
1217 | }, | |
1218 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1219 | { | |
1da177e4 LT |
1220 | .procname = "legacy_va_layout", |
1221 | .data = &sysctl_legacy_va_layout, | |
1222 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1223 | .mode = 0644, | |
6d456111 | 1224 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1225 | .extra1 = &zero, |
1226 | }, | |
1227 | #endif | |
1743660b CL |
1228 | #ifdef CONFIG_NUMA |
1229 | { | |
1743660b CL |
1230 | .procname = "zone_reclaim_mode", |
1231 | .data = &zone_reclaim_mode, | |
1232 | .maxlen = sizeof(zone_reclaim_mode), | |
1233 | .mode = 0644, | |
6d456111 | 1234 | .proc_handler = proc_dointvec, |
c84db23c | 1235 | .extra1 = &zero, |
1743660b | 1236 | }, |
9614634f | 1237 | { |
9614634f CL |
1238 | .procname = "min_unmapped_ratio", |
1239 | .data = &sysctl_min_unmapped_ratio, | |
1240 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1241 | .mode = 0644, | |
6d456111 | 1242 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1243 | .extra1 = &zero, |
1244 | .extra2 = &one_hundred, | |
1245 | }, | |
0ff38490 | 1246 | { |
0ff38490 CL |
1247 | .procname = "min_slab_ratio", |
1248 | .data = &sysctl_min_slab_ratio, | |
1249 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1250 | .mode = 0644, | |
6d456111 | 1251 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1252 | .extra1 = &zero, |
1253 | .extra2 = &one_hundred, | |
1254 | }, | |
e6e5494c | 1255 | #endif |
77461ab3 CL |
1256 | #ifdef CONFIG_SMP |
1257 | { | |
77461ab3 CL |
1258 | .procname = "stat_interval", |
1259 | .data = &sysctl_stat_interval, | |
1260 | .maxlen = sizeof(sysctl_stat_interval), | |
1261 | .mode = 0644, | |
6d456111 | 1262 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1263 | }, |
1264 | #endif | |
6e141546 | 1265 | #ifdef CONFIG_MMU |
ed032189 | 1266 | { |
ed032189 | 1267 | .procname = "mmap_min_addr", |
788084ab EP |
1268 | .data = &dac_mmap_min_addr, |
1269 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1270 | .mode = 0644, |
6d456111 | 1271 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1272 | }, |
6e141546 | 1273 | #endif |
f0c0b2b8 KH |
1274 | #ifdef CONFIG_NUMA |
1275 | { | |
f0c0b2b8 KH |
1276 | .procname = "numa_zonelist_order", |
1277 | .data = &numa_zonelist_order, | |
1278 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1279 | .mode = 0644, | |
6d456111 | 1280 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1281 | }, |
1282 | #endif | |
2b8232ce | 1283 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1284 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1285 | { |
e6e5494c IM |
1286 | .procname = "vdso_enabled", |
1287 | .data = &vdso_enabled, | |
1288 | .maxlen = sizeof(vdso_enabled), | |
1289 | .mode = 0644, | |
6d456111 | 1290 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1291 | .extra1 = &zero, |
1292 | }, | |
1da177e4 | 1293 | #endif |
195cf453 BG |
1294 | #ifdef CONFIG_HIGHMEM |
1295 | { | |
195cf453 BG |
1296 | .procname = "highmem_is_dirtyable", |
1297 | .data = &vm_highmem_is_dirtyable, | |
1298 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1299 | .mode = 0644, | |
6d456111 | 1300 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1301 | .extra1 = &zero, |
1302 | .extra2 = &one, | |
1303 | }, | |
1304 | #endif | |
4be6f6bb | 1305 | { |
4be6f6bb PZ |
1306 | .procname = "scan_unevictable_pages", |
1307 | .data = &scan_unevictable_pages, | |
1308 | .maxlen = sizeof(scan_unevictable_pages), | |
1309 | .mode = 0644, | |
6d456111 | 1310 | .proc_handler = scan_unevictable_handler, |
4be6f6bb | 1311 | }, |
6a46079c AK |
1312 | #ifdef CONFIG_MEMORY_FAILURE |
1313 | { | |
6a46079c AK |
1314 | .procname = "memory_failure_early_kill", |
1315 | .data = &sysctl_memory_failure_early_kill, | |
1316 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1317 | .mode = 0644, | |
6d456111 | 1318 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1319 | .extra1 = &zero, |
1320 | .extra2 = &one, | |
1321 | }, | |
1322 | { | |
6a46079c AK |
1323 | .procname = "memory_failure_recovery", |
1324 | .data = &sysctl_memory_failure_recovery, | |
1325 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1326 | .mode = 0644, | |
6d456111 | 1327 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1328 | .extra1 = &zero, |
1329 | .extra2 = &one, | |
1330 | }, | |
1331 | #endif | |
6fce56ec | 1332 | { } |
1da177e4 LT |
1333 | }; |
1334 | ||
2abc26fc | 1335 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1336 | static struct ctl_table binfmt_misc_table[] = { |
6fce56ec | 1337 | { } |
2abc26fc EB |
1338 | }; |
1339 | #endif | |
1340 | ||
d8217f07 | 1341 | static struct ctl_table fs_table[] = { |
1da177e4 | 1342 | { |
1da177e4 LT |
1343 | .procname = "inode-nr", |
1344 | .data = &inodes_stat, | |
1345 | .maxlen = 2*sizeof(int), | |
1346 | .mode = 0444, | |
cffbc8aa | 1347 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1348 | }, |
1349 | { | |
1da177e4 LT |
1350 | .procname = "inode-state", |
1351 | .data = &inodes_stat, | |
1352 | .maxlen = 7*sizeof(int), | |
1353 | .mode = 0444, | |
cffbc8aa | 1354 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1355 | }, |
1356 | { | |
1da177e4 LT |
1357 | .procname = "file-nr", |
1358 | .data = &files_stat, | |
518de9b3 | 1359 | .maxlen = sizeof(files_stat), |
1da177e4 | 1360 | .mode = 0444, |
6d456111 | 1361 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1362 | }, |
1363 | { | |
1da177e4 LT |
1364 | .procname = "file-max", |
1365 | .data = &files_stat.max_files, | |
518de9b3 | 1366 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1367 | .mode = 0644, |
518de9b3 | 1368 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1369 | }, |
9cfe015a | 1370 | { |
9cfe015a ED |
1371 | .procname = "nr_open", |
1372 | .data = &sysctl_nr_open, | |
1373 | .maxlen = sizeof(int), | |
1374 | .mode = 0644, | |
6d456111 | 1375 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1376 | .extra1 = &sysctl_nr_open_min, |
1377 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1378 | }, |
1da177e4 | 1379 | { |
1da177e4 LT |
1380 | .procname = "dentry-state", |
1381 | .data = &dentry_stat, | |
1382 | .maxlen = 6*sizeof(int), | |
1383 | .mode = 0444, | |
312d3ca8 | 1384 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1385 | }, |
1386 | { | |
1da177e4 LT |
1387 | .procname = "overflowuid", |
1388 | .data = &fs_overflowuid, | |
1389 | .maxlen = sizeof(int), | |
1390 | .mode = 0644, | |
6d456111 | 1391 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1392 | .extra1 = &minolduid, |
1393 | .extra2 = &maxolduid, | |
1394 | }, | |
1395 | { | |
1da177e4 LT |
1396 | .procname = "overflowgid", |
1397 | .data = &fs_overflowgid, | |
1398 | .maxlen = sizeof(int), | |
1399 | .mode = 0644, | |
6d456111 | 1400 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1401 | .extra1 = &minolduid, |
1402 | .extra2 = &maxolduid, | |
1403 | }, | |
bfcd17a6 | 1404 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1405 | { |
1da177e4 LT |
1406 | .procname = "leases-enable", |
1407 | .data = &leases_enable, | |
1408 | .maxlen = sizeof(int), | |
1409 | .mode = 0644, | |
6d456111 | 1410 | .proc_handler = proc_dointvec, |
1da177e4 | 1411 | }, |
bfcd17a6 | 1412 | #endif |
1da177e4 LT |
1413 | #ifdef CONFIG_DNOTIFY |
1414 | { | |
1da177e4 LT |
1415 | .procname = "dir-notify-enable", |
1416 | .data = &dir_notify_enable, | |
1417 | .maxlen = sizeof(int), | |
1418 | .mode = 0644, | |
6d456111 | 1419 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1420 | }, |
1421 | #endif | |
1422 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1423 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1424 | { |
1da177e4 LT |
1425 | .procname = "lease-break-time", |
1426 | .data = &lease_break_time, | |
1427 | .maxlen = sizeof(int), | |
1428 | .mode = 0644, | |
6d456111 | 1429 | .proc_handler = proc_dointvec, |
1da177e4 | 1430 | }, |
bfcd17a6 | 1431 | #endif |
ebf3f09c | 1432 | #ifdef CONFIG_AIO |
1da177e4 | 1433 | { |
1da177e4 LT |
1434 | .procname = "aio-nr", |
1435 | .data = &aio_nr, | |
1436 | .maxlen = sizeof(aio_nr), | |
1437 | .mode = 0444, | |
6d456111 | 1438 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1439 | }, |
1440 | { | |
1da177e4 LT |
1441 | .procname = "aio-max-nr", |
1442 | .data = &aio_max_nr, | |
1443 | .maxlen = sizeof(aio_max_nr), | |
1444 | .mode = 0644, | |
6d456111 | 1445 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1446 | }, |
ebf3f09c | 1447 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1448 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1449 | { |
0399cb08 RL |
1450 | .procname = "inotify", |
1451 | .mode = 0555, | |
1452 | .child = inotify_table, | |
1453 | }, | |
1454 | #endif | |
7ef9964e DL |
1455 | #ifdef CONFIG_EPOLL |
1456 | { | |
1457 | .procname = "epoll", | |
1458 | .mode = 0555, | |
1459 | .child = epoll_table, | |
1460 | }, | |
1461 | #endif | |
1da177e4 | 1462 | #endif |
d6e71144 | 1463 | { |
d6e71144 AC |
1464 | .procname = "suid_dumpable", |
1465 | .data = &suid_dumpable, | |
1466 | .maxlen = sizeof(int), | |
1467 | .mode = 0644, | |
6d456111 | 1468 | .proc_handler = proc_dointvec_minmax, |
8e654fba MW |
1469 | .extra1 = &zero, |
1470 | .extra2 = &two, | |
d6e71144 | 1471 | }, |
2abc26fc EB |
1472 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1473 | { | |
2abc26fc EB |
1474 | .procname = "binfmt_misc", |
1475 | .mode = 0555, | |
1476 | .child = binfmt_misc_table, | |
1477 | }, | |
1478 | #endif | |
b492e95b | 1479 | { |
ff9da691 JA |
1480 | .procname = "pipe-max-size", |
1481 | .data = &pipe_max_size, | |
b492e95b JA |
1482 | .maxlen = sizeof(int), |
1483 | .mode = 0644, | |
ff9da691 JA |
1484 | .proc_handler = &pipe_proc_fn, |
1485 | .extra1 = &pipe_min_size, | |
b492e95b | 1486 | }, |
6fce56ec | 1487 | { } |
1da177e4 LT |
1488 | }; |
1489 | ||
d8217f07 | 1490 | static struct ctl_table debug_table[] = { |
ab3c68ee HC |
1491 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || \ |
1492 | defined(CONFIG_S390) | |
abd4f750 | 1493 | { |
abd4f750 MAS |
1494 | .procname = "exception-trace", |
1495 | .data = &show_unhandled_signals, | |
1496 | .maxlen = sizeof(int), | |
1497 | .mode = 0644, | |
1498 | .proc_handler = proc_dointvec | |
1499 | }, | |
b2be84df MH |
1500 | #endif |
1501 | #if defined(CONFIG_OPTPROBES) | |
1502 | { | |
1503 | .procname = "kprobes-optimization", | |
1504 | .data = &sysctl_kprobes_optimization, | |
1505 | .maxlen = sizeof(int), | |
1506 | .mode = 0644, | |
1507 | .proc_handler = proc_kprobes_optimization_handler, | |
1508 | .extra1 = &zero, | |
1509 | .extra2 = &one, | |
1510 | }, | |
abd4f750 | 1511 | #endif |
6fce56ec | 1512 | { } |
1da177e4 LT |
1513 | }; |
1514 | ||
d8217f07 | 1515 | static struct ctl_table dev_table[] = { |
6fce56ec | 1516 | { } |
0eeca283 | 1517 | }; |
1da177e4 | 1518 | |
330d57fb AV |
1519 | static DEFINE_SPINLOCK(sysctl_lock); |
1520 | ||
1521 | /* called under sysctl_lock */ | |
1522 | static int use_table(struct ctl_table_header *p) | |
1523 | { | |
1524 | if (unlikely(p->unregistering)) | |
1525 | return 0; | |
1526 | p->used++; | |
1527 | return 1; | |
1528 | } | |
1529 | ||
1530 | /* called under sysctl_lock */ | |
1531 | static void unuse_table(struct ctl_table_header *p) | |
1532 | { | |
1533 | if (!--p->used) | |
1534 | if (unlikely(p->unregistering)) | |
1535 | complete(p->unregistering); | |
1536 | } | |
1537 | ||
1538 | /* called under sysctl_lock, will reacquire if has to wait */ | |
1539 | static void start_unregistering(struct ctl_table_header *p) | |
1540 | { | |
1541 | /* | |
1542 | * if p->used is 0, nobody will ever touch that entry again; | |
1543 | * we'll eliminate all paths to it before dropping sysctl_lock | |
1544 | */ | |
1545 | if (unlikely(p->used)) { | |
1546 | struct completion wait; | |
1547 | init_completion(&wait); | |
1548 | p->unregistering = &wait; | |
1549 | spin_unlock(&sysctl_lock); | |
1550 | wait_for_completion(&wait); | |
1551 | spin_lock(&sysctl_lock); | |
f7e6ced4 AV |
1552 | } else { |
1553 | /* anything non-NULL; we'll never dereference it */ | |
1554 | p->unregistering = ERR_PTR(-EINVAL); | |
330d57fb AV |
1555 | } |
1556 | /* | |
1557 | * do not remove from the list until nobody holds it; walking the | |
1558 | * list in do_sysctl() relies on that. | |
1559 | */ | |
1560 | list_del_init(&p->ctl_entry); | |
1561 | } | |
1562 | ||
f7e6ced4 AV |
1563 | void sysctl_head_get(struct ctl_table_header *head) |
1564 | { | |
1565 | spin_lock(&sysctl_lock); | |
1566 | head->count++; | |
1567 | spin_unlock(&sysctl_lock); | |
1568 | } | |
1569 | ||
1570 | void sysctl_head_put(struct ctl_table_header *head) | |
1571 | { | |
1572 | spin_lock(&sysctl_lock); | |
1573 | if (!--head->count) | |
1574 | kfree(head); | |
1575 | spin_unlock(&sysctl_lock); | |
1576 | } | |
1577 | ||
1578 | struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head) | |
1579 | { | |
1580 | if (!head) | |
1581 | BUG(); | |
1582 | spin_lock(&sysctl_lock); | |
1583 | if (!use_table(head)) | |
1584 | head = ERR_PTR(-ENOENT); | |
1585 | spin_unlock(&sysctl_lock); | |
1586 | return head; | |
1587 | } | |
1588 | ||
805b5d5e EB |
1589 | void sysctl_head_finish(struct ctl_table_header *head) |
1590 | { | |
1591 | if (!head) | |
1592 | return; | |
1593 | spin_lock(&sysctl_lock); | |
1594 | unuse_table(head); | |
1595 | spin_unlock(&sysctl_lock); | |
1596 | } | |
1597 | ||
73455092 AV |
1598 | static struct ctl_table_set * |
1599 | lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces) | |
1600 | { | |
1601 | struct ctl_table_set *set = &root->default_set; | |
1602 | if (root->lookup) | |
1603 | set = root->lookup(root, namespaces); | |
1604 | return set; | |
1605 | } | |
1606 | ||
e51b6ba0 EB |
1607 | static struct list_head * |
1608 | lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces) | |
805b5d5e | 1609 | { |
73455092 AV |
1610 | struct ctl_table_set *set = lookup_header_set(root, namespaces); |
1611 | return &set->list; | |
e51b6ba0 EB |
1612 | } |
1613 | ||
1614 | struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces, | |
1615 | struct ctl_table_header *prev) | |
1616 | { | |
1617 | struct ctl_table_root *root; | |
1618 | struct list_head *header_list; | |
805b5d5e EB |
1619 | struct ctl_table_header *head; |
1620 | struct list_head *tmp; | |
e51b6ba0 | 1621 | |
805b5d5e EB |
1622 | spin_lock(&sysctl_lock); |
1623 | if (prev) { | |
e51b6ba0 | 1624 | head = prev; |
805b5d5e EB |
1625 | tmp = &prev->ctl_entry; |
1626 | unuse_table(prev); | |
1627 | goto next; | |
1628 | } | |
1629 | tmp = &root_table_header.ctl_entry; | |
1630 | for (;;) { | |
1631 | head = list_entry(tmp, struct ctl_table_header, ctl_entry); | |
1632 | ||
1633 | if (!use_table(head)) | |
1634 | goto next; | |
1635 | spin_unlock(&sysctl_lock); | |
1636 | return head; | |
1637 | next: | |
e51b6ba0 | 1638 | root = head->root; |
805b5d5e | 1639 | tmp = tmp->next; |
e51b6ba0 EB |
1640 | header_list = lookup_header_list(root, namespaces); |
1641 | if (tmp != header_list) | |
1642 | continue; | |
1643 | ||
1644 | do { | |
1645 | root = list_entry(root->root_list.next, | |
1646 | struct ctl_table_root, root_list); | |
1647 | if (root == &sysctl_table_root) | |
1648 | goto out; | |
1649 | header_list = lookup_header_list(root, namespaces); | |
1650 | } while (list_empty(header_list)); | |
1651 | tmp = header_list->next; | |
805b5d5e | 1652 | } |
e51b6ba0 | 1653 | out: |
805b5d5e EB |
1654 | spin_unlock(&sysctl_lock); |
1655 | return NULL; | |
1656 | } | |
1657 | ||
e51b6ba0 EB |
1658 | struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev) |
1659 | { | |
1660 | return __sysctl_head_next(current->nsproxy, prev); | |
1661 | } | |
1662 | ||
1663 | void register_sysctl_root(struct ctl_table_root *root) | |
1664 | { | |
1665 | spin_lock(&sysctl_lock); | |
1666 | list_add_tail(&root->root_list, &sysctl_table_root.root_list); | |
1667 | spin_unlock(&sysctl_lock); | |
1668 | } | |
1669 | ||
1da177e4 | 1670 | /* |
1ff007eb | 1671 | * sysctl_perm does NOT grant the superuser all rights automatically, because |
1da177e4 LT |
1672 | * some sysctl variables are readonly even to root. |
1673 | */ | |
1674 | ||
1675 | static int test_perm(int mode, int op) | |
1676 | { | |
76aac0e9 | 1677 | if (!current_euid()) |
1da177e4 LT |
1678 | mode >>= 6; |
1679 | else if (in_egroup_p(0)) | |
1680 | mode >>= 3; | |
e6305c43 | 1681 | if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0) |
1da177e4 LT |
1682 | return 0; |
1683 | return -EACCES; | |
1684 | } | |
1685 | ||
d7321cd6 | 1686 | int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op) |
1da177e4 LT |
1687 | { |
1688 | int error; | |
d7321cd6 PE |
1689 | int mode; |
1690 | ||
e6305c43 | 1691 | error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC)); |
1da177e4 LT |
1692 | if (error) |
1693 | return error; | |
d7321cd6 PE |
1694 | |
1695 | if (root->permissions) | |
1696 | mode = root->permissions(root, current->nsproxy, table); | |
1697 | else | |
1698 | mode = table->mode; | |
1699 | ||
1700 | return test_perm(mode, op); | |
1da177e4 LT |
1701 | } |
1702 | ||
d912b0cc EB |
1703 | static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table) |
1704 | { | |
2315ffa0 | 1705 | for (; table->procname; table++) { |
d912b0cc EB |
1706 | table->parent = parent; |
1707 | if (table->child) | |
1708 | sysctl_set_parent(table, table->child); | |
1709 | } | |
1710 | } | |
1711 | ||
1712 | static __init int sysctl_init(void) | |
1713 | { | |
1714 | sysctl_set_parent(NULL, root_table); | |
88f458e4 | 1715 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
b3bd3de6 | 1716 | sysctl_check_table(current->nsproxy, root_table); |
88f458e4 | 1717 | #endif |
d912b0cc EB |
1718 | return 0; |
1719 | } | |
1720 | ||
1721 | core_initcall(sysctl_init); | |
1722 | ||
bfbcf034 AV |
1723 | static struct ctl_table *is_branch_in(struct ctl_table *branch, |
1724 | struct ctl_table *table) | |
ae7edecc AV |
1725 | { |
1726 | struct ctl_table *p; | |
1727 | const char *s = branch->procname; | |
1728 | ||
1729 | /* branch should have named subdirectory as its first element */ | |
1730 | if (!s || !branch->child) | |
bfbcf034 | 1731 | return NULL; |
ae7edecc AV |
1732 | |
1733 | /* ... and nothing else */ | |
2315ffa0 | 1734 | if (branch[1].procname) |
bfbcf034 | 1735 | return NULL; |
ae7edecc AV |
1736 | |
1737 | /* table should contain subdirectory with the same name */ | |
2315ffa0 | 1738 | for (p = table; p->procname; p++) { |
ae7edecc AV |
1739 | if (!p->child) |
1740 | continue; | |
1741 | if (p->procname && strcmp(p->procname, s) == 0) | |
bfbcf034 | 1742 | return p; |
ae7edecc | 1743 | } |
bfbcf034 | 1744 | return NULL; |
ae7edecc AV |
1745 | } |
1746 | ||
1747 | /* see if attaching q to p would be an improvement */ | |
1748 | static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q) | |
1749 | { | |
1750 | struct ctl_table *to = p->ctl_table, *by = q->ctl_table; | |
bfbcf034 | 1751 | struct ctl_table *next; |
ae7edecc AV |
1752 | int is_better = 0; |
1753 | int not_in_parent = !p->attached_by; | |
1754 | ||
bfbcf034 | 1755 | while ((next = is_branch_in(by, to)) != NULL) { |
ae7edecc AV |
1756 | if (by == q->attached_by) |
1757 | is_better = 1; | |
1758 | if (to == p->attached_by) | |
1759 | not_in_parent = 1; | |
1760 | by = by->child; | |
bfbcf034 | 1761 | to = next->child; |
ae7edecc AV |
1762 | } |
1763 | ||
1764 | if (is_better && not_in_parent) { | |
1765 | q->attached_by = by; | |
1766 | q->attached_to = to; | |
1767 | q->parent = p; | |
1768 | } | |
1769 | } | |
1770 | ||
1da177e4 | 1771 | /** |
e51b6ba0 EB |
1772 | * __register_sysctl_paths - register a sysctl hierarchy |
1773 | * @root: List of sysctl headers to register on | |
1774 | * @namespaces: Data to compute which lists of sysctl entries are visible | |
29e796fd | 1775 | * @path: The path to the directory the sysctl table is in. |
1da177e4 | 1776 | * @table: the top-level table structure |
1da177e4 LT |
1777 | * |
1778 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
29e796fd | 1779 | * array. A completely 0 filled entry terminates the table. |
1da177e4 | 1780 | * |
d8217f07 | 1781 | * The members of the &struct ctl_table structure are used as follows: |
1da177e4 | 1782 | * |
1da177e4 LT |
1783 | * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not |
1784 | * enter a sysctl file | |
1785 | * | |
1786 | * data - a pointer to data for use by proc_handler | |
1787 | * | |
1788 | * maxlen - the maximum size in bytes of the data | |
1789 | * | |
1790 | * mode - the file permissions for the /proc/sys file, and for sysctl(2) | |
1791 | * | |
1792 | * child - a pointer to the child sysctl table if this entry is a directory, or | |
1793 | * %NULL. | |
1794 | * | |
1795 | * proc_handler - the text handler routine (described below) | |
1796 | * | |
1da177e4 LT |
1797 | * de - for internal use by the sysctl routines |
1798 | * | |
1799 | * extra1, extra2 - extra pointers usable by the proc handler routines | |
1800 | * | |
1801 | * Leaf nodes in the sysctl tree will be represented by a single file | |
1802 | * under /proc; non-leaf nodes will be represented by directories. | |
1803 | * | |
1804 | * sysctl(2) can automatically manage read and write requests through | |
1805 | * the sysctl table. The data and maxlen fields of the ctl_table | |
1806 | * struct enable minimal validation of the values being written to be | |
1807 | * performed, and the mode field allows minimal authentication. | |
1808 | * | |
1da177e4 LT |
1809 | * There must be a proc_handler routine for any terminal nodes |
1810 | * mirrored under /proc/sys (non-terminals are handled by a built-in | |
1811 | * directory handler). Several default handlers are available to | |
1812 | * cover common cases - | |
1813 | * | |
1814 | * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(), | |
1815 | * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(), | |
1816 | * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax() | |
1817 | * | |
1818 | * It is the handler's job to read the input buffer from user memory | |
1819 | * and process it. The handler should return 0 on success. | |
1820 | * | |
1821 | * This routine returns %NULL on a failure to register, and a pointer | |
1822 | * to the table header on success. | |
1823 | */ | |
e51b6ba0 EB |
1824 | struct ctl_table_header *__register_sysctl_paths( |
1825 | struct ctl_table_root *root, | |
1826 | struct nsproxy *namespaces, | |
1827 | const struct ctl_path *path, struct ctl_table *table) | |
1da177e4 | 1828 | { |
29e796fd EB |
1829 | struct ctl_table_header *header; |
1830 | struct ctl_table *new, **prevp; | |
1831 | unsigned int n, npath; | |
ae7edecc | 1832 | struct ctl_table_set *set; |
29e796fd EB |
1833 | |
1834 | /* Count the path components */ | |
2315ffa0 | 1835 | for (npath = 0; path[npath].procname; ++npath) |
29e796fd EB |
1836 | ; |
1837 | ||
1838 | /* | |
1839 | * For each path component, allocate a 2-element ctl_table array. | |
1840 | * The first array element will be filled with the sysctl entry | |
2315ffa0 | 1841 | * for this, the second will be the sentinel (procname == 0). |
29e796fd EB |
1842 | * |
1843 | * We allocate everything in one go so that we don't have to | |
1844 | * worry about freeing additional memory in unregister_sysctl_table. | |
1845 | */ | |
1846 | header = kzalloc(sizeof(struct ctl_table_header) + | |
1847 | (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL); | |
1848 | if (!header) | |
1da177e4 | 1849 | return NULL; |
29e796fd EB |
1850 | |
1851 | new = (struct ctl_table *) (header + 1); | |
1852 | ||
1853 | /* Now connect the dots */ | |
1854 | prevp = &header->ctl_table; | |
1855 | for (n = 0; n < npath; ++n, ++path) { | |
1856 | /* Copy the procname */ | |
1857 | new->procname = path->procname; | |
29e796fd EB |
1858 | new->mode = 0555; |
1859 | ||
1860 | *prevp = new; | |
1861 | prevp = &new->child; | |
1862 | ||
1863 | new += 2; | |
1864 | } | |
1865 | *prevp = table; | |
23eb06de | 1866 | header->ctl_table_arg = table; |
29e796fd EB |
1867 | |
1868 | INIT_LIST_HEAD(&header->ctl_entry); | |
1869 | header->used = 0; | |
1870 | header->unregistering = NULL; | |
e51b6ba0 | 1871 | header->root = root; |
29e796fd | 1872 | sysctl_set_parent(NULL, header->ctl_table); |
f7e6ced4 | 1873 | header->count = 1; |
88f458e4 | 1874 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
e51b6ba0 | 1875 | if (sysctl_check_table(namespaces, header->ctl_table)) { |
29e796fd | 1876 | kfree(header); |
fc6cd25b EB |
1877 | return NULL; |
1878 | } | |
88f458e4 | 1879 | #endif |
330d57fb | 1880 | spin_lock(&sysctl_lock); |
73455092 | 1881 | header->set = lookup_header_set(root, namespaces); |
ae7edecc AV |
1882 | header->attached_by = header->ctl_table; |
1883 | header->attached_to = root_table; | |
1884 | header->parent = &root_table_header; | |
1885 | for (set = header->set; set; set = set->parent) { | |
1886 | struct ctl_table_header *p; | |
1887 | list_for_each_entry(p, &set->list, ctl_entry) { | |
1888 | if (p->unregistering) | |
1889 | continue; | |
1890 | try_attach(p, header); | |
1891 | } | |
1892 | } | |
1893 | header->parent->count++; | |
73455092 | 1894 | list_add_tail(&header->ctl_entry, &header->set->list); |
330d57fb | 1895 | spin_unlock(&sysctl_lock); |
29e796fd EB |
1896 | |
1897 | return header; | |
1898 | } | |
1899 | ||
e51b6ba0 EB |
1900 | /** |
1901 | * register_sysctl_table_path - register a sysctl table hierarchy | |
1902 | * @path: The path to the directory the sysctl table is in. | |
1903 | * @table: the top-level table structure | |
1904 | * | |
1905 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
1906 | * array. A completely 0 filled entry terminates the table. | |
1907 | * | |
1908 | * See __register_sysctl_paths for more details. | |
1909 | */ | |
1910 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, | |
1911 | struct ctl_table *table) | |
1912 | { | |
1913 | return __register_sysctl_paths(&sysctl_table_root, current->nsproxy, | |
1914 | path, table); | |
1915 | } | |
1916 | ||
29e796fd EB |
1917 | /** |
1918 | * register_sysctl_table - register a sysctl table hierarchy | |
1919 | * @table: the top-level table structure | |
1920 | * | |
1921 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
1922 | * array. A completely 0 filled entry terminates the table. | |
1923 | * | |
1924 | * See register_sysctl_paths for more details. | |
1925 | */ | |
1926 | struct ctl_table_header *register_sysctl_table(struct ctl_table *table) | |
1927 | { | |
1928 | static const struct ctl_path null_path[] = { {} }; | |
1929 | ||
1930 | return register_sysctl_paths(null_path, table); | |
1da177e4 LT |
1931 | } |
1932 | ||
1933 | /** | |
1934 | * unregister_sysctl_table - unregister a sysctl table hierarchy | |
1935 | * @header: the header returned from register_sysctl_table | |
1936 | * | |
1937 | * Unregisters the sysctl table and all children. proc entries may not | |
1938 | * actually be removed until they are no longer used by anyone. | |
1939 | */ | |
1940 | void unregister_sysctl_table(struct ctl_table_header * header) | |
1941 | { | |
330d57fb | 1942 | might_sleep(); |
f1dad166 PE |
1943 | |
1944 | if (header == NULL) | |
1945 | return; | |
1946 | ||
330d57fb AV |
1947 | spin_lock(&sysctl_lock); |
1948 | start_unregistering(header); | |
ae7edecc AV |
1949 | if (!--header->parent->count) { |
1950 | WARN_ON(1); | |
1951 | kfree(header->parent); | |
1952 | } | |
f7e6ced4 AV |
1953 | if (!--header->count) |
1954 | kfree(header); | |
330d57fb | 1955 | spin_unlock(&sysctl_lock); |
1da177e4 LT |
1956 | } |
1957 | ||
9043476f AV |
1958 | int sysctl_is_seen(struct ctl_table_header *p) |
1959 | { | |
1960 | struct ctl_table_set *set = p->set; | |
1961 | int res; | |
1962 | spin_lock(&sysctl_lock); | |
1963 | if (p->unregistering) | |
1964 | res = 0; | |
1965 | else if (!set->is_seen) | |
1966 | res = 1; | |
1967 | else | |
1968 | res = set->is_seen(set); | |
1969 | spin_unlock(&sysctl_lock); | |
1970 | return res; | |
1971 | } | |
1972 | ||
73455092 AV |
1973 | void setup_sysctl_set(struct ctl_table_set *p, |
1974 | struct ctl_table_set *parent, | |
1975 | int (*is_seen)(struct ctl_table_set *)) | |
1976 | { | |
1977 | INIT_LIST_HEAD(&p->list); | |
1978 | p->parent = parent ? parent : &sysctl_table_root.default_set; | |
1979 | p->is_seen = is_seen; | |
1980 | } | |
1981 | ||
b89a8171 | 1982 | #else /* !CONFIG_SYSCTL */ |
d8217f07 | 1983 | struct ctl_table_header *register_sysctl_table(struct ctl_table * table) |
b89a8171 EB |
1984 | { |
1985 | return NULL; | |
1986 | } | |
1987 | ||
29e796fd EB |
1988 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, |
1989 | struct ctl_table *table) | |
1990 | { | |
1991 | return NULL; | |
1992 | } | |
1993 | ||
b89a8171 EB |
1994 | void unregister_sysctl_table(struct ctl_table_header * table) |
1995 | { | |
1996 | } | |
1997 | ||
73455092 AV |
1998 | void setup_sysctl_set(struct ctl_table_set *p, |
1999 | struct ctl_table_set *parent, | |
2000 | int (*is_seen)(struct ctl_table_set *)) | |
2001 | { | |
2002 | } | |
2003 | ||
f7e6ced4 AV |
2004 | void sysctl_head_put(struct ctl_table_header *head) |
2005 | { | |
2006 | } | |
2007 | ||
b89a8171 EB |
2008 | #endif /* CONFIG_SYSCTL */ |
2009 | ||
1da177e4 LT |
2010 | /* |
2011 | * /proc/sys support | |
2012 | */ | |
2013 | ||
b89a8171 | 2014 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 2015 | |
b1ba4ddd | 2016 | static int _proc_do_string(void* data, int maxlen, int write, |
8d65af78 | 2017 | void __user *buffer, |
b1ba4ddd | 2018 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2019 | { |
2020 | size_t len; | |
2021 | char __user *p; | |
2022 | char c; | |
8d060877 ON |
2023 | |
2024 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
2025 | *lenp = 0; |
2026 | return 0; | |
2027 | } | |
8d060877 | 2028 | |
1da177e4 LT |
2029 | if (write) { |
2030 | len = 0; | |
2031 | p = buffer; | |
2032 | while (len < *lenp) { | |
2033 | if (get_user(c, p++)) | |
2034 | return -EFAULT; | |
2035 | if (c == 0 || c == '\n') | |
2036 | break; | |
2037 | len++; | |
2038 | } | |
f5dd3d6f SV |
2039 | if (len >= maxlen) |
2040 | len = maxlen-1; | |
2041 | if(copy_from_user(data, buffer, len)) | |
1da177e4 | 2042 | return -EFAULT; |
f5dd3d6f | 2043 | ((char *) data)[len] = 0; |
1da177e4 LT |
2044 | *ppos += *lenp; |
2045 | } else { | |
f5dd3d6f SV |
2046 | len = strlen(data); |
2047 | if (len > maxlen) | |
2048 | len = maxlen; | |
8d060877 ON |
2049 | |
2050 | if (*ppos > len) { | |
2051 | *lenp = 0; | |
2052 | return 0; | |
2053 | } | |
2054 | ||
2055 | data += *ppos; | |
2056 | len -= *ppos; | |
2057 | ||
1da177e4 LT |
2058 | if (len > *lenp) |
2059 | len = *lenp; | |
2060 | if (len) | |
f5dd3d6f | 2061 | if(copy_to_user(buffer, data, len)) |
1da177e4 LT |
2062 | return -EFAULT; |
2063 | if (len < *lenp) { | |
2064 | if(put_user('\n', ((char __user *) buffer) + len)) | |
2065 | return -EFAULT; | |
2066 | len++; | |
2067 | } | |
2068 | *lenp = len; | |
2069 | *ppos += len; | |
2070 | } | |
2071 | return 0; | |
2072 | } | |
2073 | ||
f5dd3d6f SV |
2074 | /** |
2075 | * proc_dostring - read a string sysctl | |
2076 | * @table: the sysctl table | |
2077 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
2078 | * @buffer: the user buffer |
2079 | * @lenp: the size of the user buffer | |
2080 | * @ppos: file position | |
2081 | * | |
2082 | * Reads/writes a string from/to the user buffer. If the kernel | |
2083 | * buffer provided is not large enough to hold the string, the | |
2084 | * string is truncated. The copied string is %NULL-terminated. | |
2085 | * If the string is being read by the user process, it is copied | |
2086 | * and a newline '\n' is added. It is truncated if the buffer is | |
2087 | * not large enough. | |
2088 | * | |
2089 | * Returns 0 on success. | |
2090 | */ | |
8d65af78 | 2091 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2092 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2093 | { | |
8d65af78 | 2094 | return _proc_do_string(table->data, table->maxlen, write, |
f5dd3d6f SV |
2095 | buffer, lenp, ppos); |
2096 | } | |
2097 | ||
00b7c339 AW |
2098 | static size_t proc_skip_spaces(char **buf) |
2099 | { | |
2100 | size_t ret; | |
2101 | char *tmp = skip_spaces(*buf); | |
2102 | ret = tmp - *buf; | |
2103 | *buf = tmp; | |
2104 | return ret; | |
2105 | } | |
2106 | ||
9f977fb7 OP |
2107 | static void proc_skip_char(char **buf, size_t *size, const char v) |
2108 | { | |
2109 | while (*size) { | |
2110 | if (**buf != v) | |
2111 | break; | |
2112 | (*size)--; | |
2113 | (*buf)++; | |
2114 | } | |
2115 | } | |
2116 | ||
00b7c339 AW |
2117 | #define TMPBUFLEN 22 |
2118 | /** | |
0fc377bd | 2119 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 2120 | * |
0fc377bd RD |
2121 | * @buf: a kernel buffer |
2122 | * @size: size of the kernel buffer | |
2123 | * @val: this is where the number will be stored | |
2124 | * @neg: set to %TRUE if number is negative | |
2125 | * @perm_tr: a vector which contains the allowed trailers | |
2126 | * @perm_tr_len: size of the perm_tr vector | |
2127 | * @tr: pointer to store the trailer character | |
00b7c339 | 2128 | * |
0fc377bd RD |
2129 | * In case of success %0 is returned and @buf and @size are updated with |
2130 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
2131 | * character exists (size is non-zero after returning from this | |
2132 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
2133 | */ |
2134 | static int proc_get_long(char **buf, size_t *size, | |
2135 | unsigned long *val, bool *neg, | |
2136 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
2137 | { | |
2138 | int len; | |
2139 | char *p, tmp[TMPBUFLEN]; | |
2140 | ||
2141 | if (!*size) | |
2142 | return -EINVAL; | |
2143 | ||
2144 | len = *size; | |
2145 | if (len > TMPBUFLEN - 1) | |
2146 | len = TMPBUFLEN - 1; | |
2147 | ||
2148 | memcpy(tmp, *buf, len); | |
2149 | ||
2150 | tmp[len] = 0; | |
2151 | p = tmp; | |
2152 | if (*p == '-' && *size > 1) { | |
2153 | *neg = true; | |
2154 | p++; | |
2155 | } else | |
2156 | *neg = false; | |
2157 | if (!isdigit(*p)) | |
2158 | return -EINVAL; | |
2159 | ||
2160 | *val = simple_strtoul(p, &p, 0); | |
2161 | ||
2162 | len = p - tmp; | |
2163 | ||
2164 | /* We don't know if the next char is whitespace thus we may accept | |
2165 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
2166 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
2167 | if (len == TMPBUFLEN - 1) | |
2168 | return -EINVAL; | |
2169 | ||
2170 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
2171 | return -EINVAL; | |
1da177e4 | 2172 | |
00b7c339 AW |
2173 | if (tr && (len < *size)) |
2174 | *tr = *p; | |
2175 | ||
2176 | *buf += len; | |
2177 | *size -= len; | |
2178 | ||
2179 | return 0; | |
2180 | } | |
2181 | ||
2182 | /** | |
0fc377bd | 2183 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 2184 | * |
0fc377bd RD |
2185 | * @buf: the user buffer |
2186 | * @size: the size of the user buffer | |
2187 | * @val: the integer to be converted | |
2188 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 2189 | * |
0fc377bd RD |
2190 | * In case of success %0 is returned and @buf and @size are updated with |
2191 | * the amount of bytes written. | |
00b7c339 AW |
2192 | */ |
2193 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
2194 | bool neg) | |
2195 | { | |
2196 | int len; | |
2197 | char tmp[TMPBUFLEN], *p = tmp; | |
2198 | ||
2199 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
2200 | len = strlen(tmp); | |
2201 | if (len > *size) | |
2202 | len = *size; | |
2203 | if (copy_to_user(*buf, tmp, len)) | |
2204 | return -EFAULT; | |
2205 | *size -= len; | |
2206 | *buf += len; | |
2207 | return 0; | |
2208 | } | |
2209 | #undef TMPBUFLEN | |
2210 | ||
2211 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
2212 | { | |
2213 | if (*size) { | |
2214 | char __user **buffer = (char __user **)buf; | |
2215 | if (put_user(c, *buffer)) | |
2216 | return -EFAULT; | |
2217 | (*size)--, (*buffer)++; | |
2218 | *buf = *buffer; | |
2219 | } | |
2220 | return 0; | |
2221 | } | |
1da177e4 | 2222 | |
00b7c339 | 2223 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2224 | int *valp, |
2225 | int write, void *data) | |
2226 | { | |
2227 | if (write) { | |
2228 | *valp = *negp ? -*lvalp : *lvalp; | |
2229 | } else { | |
2230 | int val = *valp; | |
2231 | if (val < 0) { | |
00b7c339 | 2232 | *negp = true; |
1da177e4 LT |
2233 | *lvalp = (unsigned long)-val; |
2234 | } else { | |
00b7c339 | 2235 | *negp = false; |
1da177e4 LT |
2236 | *lvalp = (unsigned long)val; |
2237 | } | |
2238 | } | |
2239 | return 0; | |
2240 | } | |
2241 | ||
00b7c339 AW |
2242 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
2243 | ||
d8217f07 | 2244 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2245 | int write, void __user *buffer, |
fcfbd547 | 2246 | size_t *lenp, loff_t *ppos, |
00b7c339 | 2247 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
2248 | int write, void *data), |
2249 | void *data) | |
2250 | { | |
00b7c339 AW |
2251 | int *i, vleft, first = 1, err = 0; |
2252 | unsigned long page = 0; | |
2253 | size_t left; | |
2254 | char *kbuf; | |
1da177e4 | 2255 | |
00b7c339 | 2256 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2257 | *lenp = 0; |
2258 | return 0; | |
2259 | } | |
2260 | ||
fcfbd547 | 2261 | i = (int *) tbl_data; |
1da177e4 LT |
2262 | vleft = table->maxlen / sizeof(*i); |
2263 | left = *lenp; | |
2264 | ||
2265 | if (!conv) | |
2266 | conv = do_proc_dointvec_conv; | |
2267 | ||
00b7c339 AW |
2268 | if (write) { |
2269 | if (left > PAGE_SIZE - 1) | |
2270 | left = PAGE_SIZE - 1; | |
2271 | page = __get_free_page(GFP_TEMPORARY); | |
2272 | kbuf = (char *) page; | |
2273 | if (!kbuf) | |
2274 | return -ENOMEM; | |
2275 | if (copy_from_user(kbuf, buffer, left)) { | |
2276 | err = -EFAULT; | |
2277 | goto free; | |
2278 | } | |
2279 | kbuf[left] = 0; | |
2280 | } | |
2281 | ||
1da177e4 | 2282 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2283 | unsigned long lval; |
2284 | bool neg; | |
1da177e4 | 2285 | |
00b7c339 AW |
2286 | if (write) { |
2287 | left -= proc_skip_spaces(&kbuf); | |
1da177e4 | 2288 | |
563b0467 O |
2289 | if (!left) |
2290 | break; | |
00b7c339 AW |
2291 | err = proc_get_long(&kbuf, &left, &lval, &neg, |
2292 | proc_wspace_sep, | |
2293 | sizeof(proc_wspace_sep), NULL); | |
2294 | if (err) | |
1da177e4 | 2295 | break; |
00b7c339 AW |
2296 | if (conv(&neg, &lval, i, 1, data)) { |
2297 | err = -EINVAL; | |
1da177e4 | 2298 | break; |
00b7c339 | 2299 | } |
1da177e4 | 2300 | } else { |
00b7c339 AW |
2301 | if (conv(&neg, &lval, i, 0, data)) { |
2302 | err = -EINVAL; | |
2303 | break; | |
2304 | } | |
1da177e4 | 2305 | if (!first) |
00b7c339 AW |
2306 | err = proc_put_char(&buffer, &left, '\t'); |
2307 | if (err) | |
2308 | break; | |
2309 | err = proc_put_long(&buffer, &left, lval, neg); | |
2310 | if (err) | |
1da177e4 | 2311 | break; |
1da177e4 LT |
2312 | } |
2313 | } | |
2314 | ||
00b7c339 AW |
2315 | if (!write && !first && left && !err) |
2316 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2317 | if (write && !err && left) |
00b7c339 AW |
2318 | left -= proc_skip_spaces(&kbuf); |
2319 | free: | |
1da177e4 | 2320 | if (write) { |
00b7c339 AW |
2321 | free_page(page); |
2322 | if (first) | |
2323 | return err ? : -EINVAL; | |
1da177e4 | 2324 | } |
1da177e4 LT |
2325 | *lenp -= left; |
2326 | *ppos += *lenp; | |
00b7c339 | 2327 | return err; |
1da177e4 LT |
2328 | } |
2329 | ||
8d65af78 | 2330 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2331 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2332 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2333 | int write, void *data), |
2334 | void *data) | |
2335 | { | |
8d65af78 | 2336 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2337 | buffer, lenp, ppos, conv, data); |
2338 | } | |
2339 | ||
1da177e4 LT |
2340 | /** |
2341 | * proc_dointvec - read a vector of integers | |
2342 | * @table: the sysctl table | |
2343 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2344 | * @buffer: the user buffer |
2345 | * @lenp: the size of the user buffer | |
2346 | * @ppos: file position | |
2347 | * | |
2348 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2349 | * values from/to the user buffer, treated as an ASCII string. | |
2350 | * | |
2351 | * Returns 0 on success. | |
2352 | */ | |
8d65af78 | 2353 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2354 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2355 | { | |
8d65af78 | 2356 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2357 | NULL,NULL); |
2358 | } | |
2359 | ||
34f5a398 | 2360 | /* |
25ddbb18 AK |
2361 | * Taint values can only be increased |
2362 | * This means we can safely use a temporary. | |
34f5a398 | 2363 | */ |
8d65af78 | 2364 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2365 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2366 | { | |
25ddbb18 AK |
2367 | struct ctl_table t; |
2368 | unsigned long tmptaint = get_taint(); | |
2369 | int err; | |
34f5a398 | 2370 | |
91fcd412 | 2371 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2372 | return -EPERM; |
2373 | ||
25ddbb18 AK |
2374 | t = *table; |
2375 | t.data = &tmptaint; | |
8d65af78 | 2376 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2377 | if (err < 0) |
2378 | return err; | |
2379 | ||
2380 | if (write) { | |
2381 | /* | |
2382 | * Poor man's atomic or. Not worth adding a primitive | |
2383 | * to everyone's atomic.h for this | |
2384 | */ | |
2385 | int i; | |
2386 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2387 | if ((tmptaint >> i) & 1) | |
2388 | add_taint(i); | |
2389 | } | |
2390 | } | |
2391 | ||
2392 | return err; | |
34f5a398 TT |
2393 | } |
2394 | ||
1da177e4 LT |
2395 | struct do_proc_dointvec_minmax_conv_param { |
2396 | int *min; | |
2397 | int *max; | |
2398 | }; | |
2399 | ||
00b7c339 AW |
2400 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2401 | int *valp, | |
1da177e4 LT |
2402 | int write, void *data) |
2403 | { | |
2404 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2405 | if (write) { | |
2406 | int val = *negp ? -*lvalp : *lvalp; | |
2407 | if ((param->min && *param->min > val) || | |
2408 | (param->max && *param->max < val)) | |
2409 | return -EINVAL; | |
2410 | *valp = val; | |
2411 | } else { | |
2412 | int val = *valp; | |
2413 | if (val < 0) { | |
00b7c339 | 2414 | *negp = true; |
1da177e4 LT |
2415 | *lvalp = (unsigned long)-val; |
2416 | } else { | |
00b7c339 | 2417 | *negp = false; |
1da177e4 LT |
2418 | *lvalp = (unsigned long)val; |
2419 | } | |
2420 | } | |
2421 | return 0; | |
2422 | } | |
2423 | ||
2424 | /** | |
2425 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2426 | * @table: the sysctl table | |
2427 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2428 | * @buffer: the user buffer |
2429 | * @lenp: the size of the user buffer | |
2430 | * @ppos: file position | |
2431 | * | |
2432 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2433 | * values from/to the user buffer, treated as an ASCII string. | |
2434 | * | |
2435 | * This routine will ensure the values are within the range specified by | |
2436 | * table->extra1 (min) and table->extra2 (max). | |
2437 | * | |
2438 | * Returns 0 on success. | |
2439 | */ | |
8d65af78 | 2440 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2441 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2442 | { | |
2443 | struct do_proc_dointvec_minmax_conv_param param = { | |
2444 | .min = (int *) table->extra1, | |
2445 | .max = (int *) table->extra2, | |
2446 | }; | |
8d65af78 | 2447 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2448 | do_proc_dointvec_minmax_conv, ¶m); |
2449 | } | |
2450 | ||
d8217f07 | 2451 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2452 | void __user *buffer, |
2453 | size_t *lenp, loff_t *ppos, | |
2454 | unsigned long convmul, | |
2455 | unsigned long convdiv) | |
2456 | { | |
00b7c339 AW |
2457 | unsigned long *i, *min, *max; |
2458 | int vleft, first = 1, err = 0; | |
2459 | unsigned long page = 0; | |
2460 | size_t left; | |
2461 | char *kbuf; | |
2462 | ||
2463 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2464 | *lenp = 0; |
2465 | return 0; | |
2466 | } | |
00b7c339 | 2467 | |
fcfbd547 | 2468 | i = (unsigned long *) data; |
1da177e4 LT |
2469 | min = (unsigned long *) table->extra1; |
2470 | max = (unsigned long *) table->extra2; | |
2471 | vleft = table->maxlen / sizeof(unsigned long); | |
2472 | left = *lenp; | |
00b7c339 AW |
2473 | |
2474 | if (write) { | |
2475 | if (left > PAGE_SIZE - 1) | |
2476 | left = PAGE_SIZE - 1; | |
2477 | page = __get_free_page(GFP_TEMPORARY); | |
2478 | kbuf = (char *) page; | |
2479 | if (!kbuf) | |
2480 | return -ENOMEM; | |
2481 | if (copy_from_user(kbuf, buffer, left)) { | |
2482 | err = -EFAULT; | |
2483 | goto free; | |
2484 | } | |
2485 | kbuf[left] = 0; | |
2486 | } | |
2487 | ||
27b3d80a | 2488 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2489 | unsigned long val; |
2490 | ||
1da177e4 | 2491 | if (write) { |
00b7c339 AW |
2492 | bool neg; |
2493 | ||
2494 | left -= proc_skip_spaces(&kbuf); | |
2495 | ||
2496 | err = proc_get_long(&kbuf, &left, &val, &neg, | |
2497 | proc_wspace_sep, | |
2498 | sizeof(proc_wspace_sep), NULL); | |
2499 | if (err) | |
1da177e4 LT |
2500 | break; |
2501 | if (neg) | |
1da177e4 LT |
2502 | continue; |
2503 | if ((min && val < *min) || (max && val > *max)) | |
2504 | continue; | |
2505 | *i = val; | |
2506 | } else { | |
00b7c339 | 2507 | val = convdiv * (*i) / convmul; |
1da177e4 | 2508 | if (!first) |
00b7c339 AW |
2509 | err = proc_put_char(&buffer, &left, '\t'); |
2510 | err = proc_put_long(&buffer, &left, val, false); | |
2511 | if (err) | |
2512 | break; | |
1da177e4 LT |
2513 | } |
2514 | } | |
2515 | ||
00b7c339 AW |
2516 | if (!write && !first && left && !err) |
2517 | err = proc_put_char(&buffer, &left, '\n'); | |
2518 | if (write && !err) | |
2519 | left -= proc_skip_spaces(&kbuf); | |
2520 | free: | |
1da177e4 | 2521 | if (write) { |
00b7c339 AW |
2522 | free_page(page); |
2523 | if (first) | |
2524 | return err ? : -EINVAL; | |
1da177e4 | 2525 | } |
1da177e4 LT |
2526 | *lenp -= left; |
2527 | *ppos += *lenp; | |
00b7c339 | 2528 | return err; |
1da177e4 LT |
2529 | } |
2530 | ||
d8217f07 | 2531 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2532 | void __user *buffer, |
2533 | size_t *lenp, loff_t *ppos, | |
2534 | unsigned long convmul, | |
2535 | unsigned long convdiv) | |
2536 | { | |
2537 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2538 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2539 | } |
2540 | ||
1da177e4 LT |
2541 | /** |
2542 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2543 | * @table: the sysctl table | |
2544 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2545 | * @buffer: the user buffer |
2546 | * @lenp: the size of the user buffer | |
2547 | * @ppos: file position | |
2548 | * | |
2549 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2550 | * values from/to the user buffer, treated as an ASCII string. | |
2551 | * | |
2552 | * This routine will ensure the values are within the range specified by | |
2553 | * table->extra1 (min) and table->extra2 (max). | |
2554 | * | |
2555 | * Returns 0 on success. | |
2556 | */ | |
8d65af78 | 2557 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2558 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2559 | { | |
8d65af78 | 2560 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2561 | } |
2562 | ||
2563 | /** | |
2564 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2565 | * @table: the sysctl table | |
2566 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2567 | * @buffer: the user buffer |
2568 | * @lenp: the size of the user buffer | |
2569 | * @ppos: file position | |
2570 | * | |
2571 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2572 | * values from/to the user buffer, treated as an ASCII string. The values | |
2573 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2574 | * | |
2575 | * This routine will ensure the values are within the range specified by | |
2576 | * table->extra1 (min) and table->extra2 (max). | |
2577 | * | |
2578 | * Returns 0 on success. | |
2579 | */ | |
d8217f07 | 2580 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2581 | void __user *buffer, |
2582 | size_t *lenp, loff_t *ppos) | |
2583 | { | |
8d65af78 | 2584 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2585 | lenp, ppos, HZ, 1000l); |
2586 | } | |
2587 | ||
2588 | ||
00b7c339 | 2589 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2590 | int *valp, |
2591 | int write, void *data) | |
2592 | { | |
2593 | if (write) { | |
cba9f33d BS |
2594 | if (*lvalp > LONG_MAX / HZ) |
2595 | return 1; | |
1da177e4 LT |
2596 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2597 | } else { | |
2598 | int val = *valp; | |
2599 | unsigned long lval; | |
2600 | if (val < 0) { | |
00b7c339 | 2601 | *negp = true; |
1da177e4 LT |
2602 | lval = (unsigned long)-val; |
2603 | } else { | |
00b7c339 | 2604 | *negp = false; |
1da177e4 LT |
2605 | lval = (unsigned long)val; |
2606 | } | |
2607 | *lvalp = lval / HZ; | |
2608 | } | |
2609 | return 0; | |
2610 | } | |
2611 | ||
00b7c339 | 2612 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2613 | int *valp, |
2614 | int write, void *data) | |
2615 | { | |
2616 | if (write) { | |
cba9f33d BS |
2617 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2618 | return 1; | |
1da177e4 LT |
2619 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2620 | } else { | |
2621 | int val = *valp; | |
2622 | unsigned long lval; | |
2623 | if (val < 0) { | |
00b7c339 | 2624 | *negp = true; |
1da177e4 LT |
2625 | lval = (unsigned long)-val; |
2626 | } else { | |
00b7c339 | 2627 | *negp = false; |
1da177e4 LT |
2628 | lval = (unsigned long)val; |
2629 | } | |
2630 | *lvalp = jiffies_to_clock_t(lval); | |
2631 | } | |
2632 | return 0; | |
2633 | } | |
2634 | ||
00b7c339 | 2635 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2636 | int *valp, |
2637 | int write, void *data) | |
2638 | { | |
2639 | if (write) { | |
2640 | *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); | |
2641 | } else { | |
2642 | int val = *valp; | |
2643 | unsigned long lval; | |
2644 | if (val < 0) { | |
00b7c339 | 2645 | *negp = true; |
1da177e4 LT |
2646 | lval = (unsigned long)-val; |
2647 | } else { | |
00b7c339 | 2648 | *negp = false; |
1da177e4 LT |
2649 | lval = (unsigned long)val; |
2650 | } | |
2651 | *lvalp = jiffies_to_msecs(lval); | |
2652 | } | |
2653 | return 0; | |
2654 | } | |
2655 | ||
2656 | /** | |
2657 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2658 | * @table: the sysctl table | |
2659 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2660 | * @buffer: the user buffer |
2661 | * @lenp: the size of the user buffer | |
2662 | * @ppos: file position | |
2663 | * | |
2664 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2665 | * values from/to the user buffer, treated as an ASCII string. | |
2666 | * The values read are assumed to be in seconds, and are converted into | |
2667 | * jiffies. | |
2668 | * | |
2669 | * Returns 0 on success. | |
2670 | */ | |
8d65af78 | 2671 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2672 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2673 | { | |
8d65af78 | 2674 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2675 | do_proc_dointvec_jiffies_conv,NULL); |
2676 | } | |
2677 | ||
2678 | /** | |
2679 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2680 | * @table: the sysctl table | |
2681 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2682 | * @buffer: the user buffer |
2683 | * @lenp: the size of the user buffer | |
1e5d5331 | 2684 | * @ppos: pointer to the file position |
1da177e4 LT |
2685 | * |
2686 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2687 | * values from/to the user buffer, treated as an ASCII string. | |
2688 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2689 | * are converted into jiffies. | |
2690 | * | |
2691 | * Returns 0 on success. | |
2692 | */ | |
8d65af78 | 2693 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2694 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2695 | { | |
8d65af78 | 2696 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2697 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2698 | } | |
2699 | ||
2700 | /** | |
2701 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2702 | * @table: the sysctl table | |
2703 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2704 | * @buffer: the user buffer |
2705 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2706 | * @ppos: file position |
2707 | * @ppos: the current position in the file | |
1da177e4 LT |
2708 | * |
2709 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2710 | * values from/to the user buffer, treated as an ASCII string. | |
2711 | * The values read are assumed to be in 1/1000 seconds, and | |
2712 | * are converted into jiffies. | |
2713 | * | |
2714 | * Returns 0 on success. | |
2715 | */ | |
8d65af78 | 2716 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2717 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2718 | { | |
8d65af78 | 2719 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2720 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2721 | } | |
2722 | ||
8d65af78 | 2723 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2724 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2725 | { | |
2726 | struct pid *new_pid; | |
2727 | pid_t tmp; | |
2728 | int r; | |
2729 | ||
6c5f3e7b | 2730 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2731 | |
8d65af78 | 2732 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2733 | lenp, ppos, NULL, NULL); |
2734 | if (r || !write) | |
2735 | return r; | |
2736 | ||
2737 | new_pid = find_get_pid(tmp); | |
2738 | if (!new_pid) | |
2739 | return -ESRCH; | |
2740 | ||
2741 | put_pid(xchg(&cad_pid, new_pid)); | |
2742 | return 0; | |
2743 | } | |
2744 | ||
9f977fb7 OP |
2745 | /** |
2746 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2747 | * @table: the sysctl table | |
2748 | * @write: %TRUE if this is a write to the sysctl file | |
2749 | * @buffer: the user buffer | |
2750 | * @lenp: the size of the user buffer | |
2751 | * @ppos: file position | |
2752 | * | |
2753 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2754 | * in table->maxlen. | |
2755 | * | |
2756 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2757 | * large bitmaps may be represented in a compact manner. Writing into | |
2758 | * the file will clear the bitmap then update it with the given input. | |
2759 | * | |
2760 | * Returns 0 on success. | |
2761 | */ | |
2762 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2763 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2764 | { | |
2765 | int err = 0; | |
2766 | bool first = 1; | |
2767 | size_t left = *lenp; | |
2768 | unsigned long bitmap_len = table->maxlen; | |
2769 | unsigned long *bitmap = (unsigned long *) table->data; | |
2770 | unsigned long *tmp_bitmap = NULL; | |
2771 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2772 | ||
2773 | if (!bitmap_len || !left || (*ppos && !write)) { | |
2774 | *lenp = 0; | |
2775 | return 0; | |
2776 | } | |
2777 | ||
2778 | if (write) { | |
2779 | unsigned long page = 0; | |
2780 | char *kbuf; | |
2781 | ||
2782 | if (left > PAGE_SIZE - 1) | |
2783 | left = PAGE_SIZE - 1; | |
2784 | ||
2785 | page = __get_free_page(GFP_TEMPORARY); | |
2786 | kbuf = (char *) page; | |
2787 | if (!kbuf) | |
2788 | return -ENOMEM; | |
2789 | if (copy_from_user(kbuf, buffer, left)) { | |
2790 | free_page(page); | |
2791 | return -EFAULT; | |
2792 | } | |
2793 | kbuf[left] = 0; | |
2794 | ||
2795 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2796 | GFP_KERNEL); | |
2797 | if (!tmp_bitmap) { | |
2798 | free_page(page); | |
2799 | return -ENOMEM; | |
2800 | } | |
2801 | proc_skip_char(&kbuf, &left, '\n'); | |
2802 | while (!err && left) { | |
2803 | unsigned long val_a, val_b; | |
2804 | bool neg; | |
2805 | ||
2806 | err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a, | |
2807 | sizeof(tr_a), &c); | |
2808 | if (err) | |
2809 | break; | |
2810 | if (val_a >= bitmap_len || neg) { | |
2811 | err = -EINVAL; | |
2812 | break; | |
2813 | } | |
2814 | ||
2815 | val_b = val_a; | |
2816 | if (left) { | |
2817 | kbuf++; | |
2818 | left--; | |
2819 | } | |
2820 | ||
2821 | if (c == '-') { | |
2822 | err = proc_get_long(&kbuf, &left, &val_b, | |
2823 | &neg, tr_b, sizeof(tr_b), | |
2824 | &c); | |
2825 | if (err) | |
2826 | break; | |
2827 | if (val_b >= bitmap_len || neg || | |
2828 | val_a > val_b) { | |
2829 | err = -EINVAL; | |
2830 | break; | |
2831 | } | |
2832 | if (left) { | |
2833 | kbuf++; | |
2834 | left--; | |
2835 | } | |
2836 | } | |
2837 | ||
2838 | while (val_a <= val_b) | |
2839 | set_bit(val_a++, tmp_bitmap); | |
2840 | ||
2841 | first = 0; | |
2842 | proc_skip_char(&kbuf, &left, '\n'); | |
2843 | } | |
2844 | free_page(page); | |
2845 | } else { | |
2846 | unsigned long bit_a, bit_b = 0; | |
2847 | ||
2848 | while (left) { | |
2849 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
2850 | if (bit_a >= bitmap_len) | |
2851 | break; | |
2852 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
2853 | bit_a + 1) - 1; | |
2854 | ||
2855 | if (!first) { | |
2856 | err = proc_put_char(&buffer, &left, ','); | |
2857 | if (err) | |
2858 | break; | |
2859 | } | |
2860 | err = proc_put_long(&buffer, &left, bit_a, false); | |
2861 | if (err) | |
2862 | break; | |
2863 | if (bit_a != bit_b) { | |
2864 | err = proc_put_char(&buffer, &left, '-'); | |
2865 | if (err) | |
2866 | break; | |
2867 | err = proc_put_long(&buffer, &left, bit_b, false); | |
2868 | if (err) | |
2869 | break; | |
2870 | } | |
2871 | ||
2872 | first = 0; bit_b++; | |
2873 | } | |
2874 | if (!err) | |
2875 | err = proc_put_char(&buffer, &left, '\n'); | |
2876 | } | |
2877 | ||
2878 | if (!err) { | |
2879 | if (write) { | |
2880 | if (*ppos) | |
2881 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
2882 | else | |
2883 | memcpy(bitmap, tmp_bitmap, | |
2884 | BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long)); | |
2885 | } | |
2886 | kfree(tmp_bitmap); | |
2887 | *lenp -= left; | |
2888 | *ppos += *lenp; | |
2889 | return 0; | |
2890 | } else { | |
2891 | kfree(tmp_bitmap); | |
2892 | return err; | |
2893 | } | |
2894 | } | |
2895 | ||
55610500 | 2896 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2897 | |
8d65af78 | 2898 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2899 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2900 | { | |
2901 | return -ENOSYS; | |
2902 | } | |
2903 | ||
8d65af78 | 2904 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2905 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2906 | { |
2907 | return -ENOSYS; | |
2908 | } | |
2909 | ||
8d65af78 | 2910 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2911 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2912 | { | |
2913 | return -ENOSYS; | |
2914 | } | |
2915 | ||
8d65af78 | 2916 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2917 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2918 | { | |
2919 | return -ENOSYS; | |
2920 | } | |
2921 | ||
8d65af78 | 2922 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2923 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2924 | { | |
2925 | return -ENOSYS; | |
2926 | } | |
2927 | ||
8d65af78 | 2928 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2929 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2930 | { | |
2931 | return -ENOSYS; | |
2932 | } | |
2933 | ||
8d65af78 | 2934 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2935 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2936 | { | |
2937 | return -ENOSYS; | |
2938 | } | |
2939 | ||
d8217f07 | 2940 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2941 | void __user *buffer, |
2942 | size_t *lenp, loff_t *ppos) | |
2943 | { | |
2944 | return -ENOSYS; | |
2945 | } | |
2946 | ||
2947 | ||
55610500 | 2948 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2949 | |
1da177e4 LT |
2950 | /* |
2951 | * No sense putting this after each symbol definition, twice, | |
2952 | * exception granted :-) | |
2953 | */ | |
2954 | EXPORT_SYMBOL(proc_dointvec); | |
2955 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2956 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2957 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2958 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2959 | EXPORT_SYMBOL(proc_dostring); | |
2960 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2961 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); | |
2962 | EXPORT_SYMBOL(register_sysctl_table); | |
29e796fd | 2963 | EXPORT_SYMBOL(register_sysctl_paths); |
1da177e4 | 2964 | EXPORT_SYMBOL(unregister_sysctl_table); |