Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 LT |
21 | #include <linux/module.h> |
22 | #include <linux/mm.h> | |
23 | #include <linux/swap.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/sysctl.h> | |
d33ed52d | 26 | #include <linux/signal.h> |
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; | |
cb16e95f | 120 | static int __maybe_unused three = 3; |
fc3501d4 | 121 | static unsigned long one_ul = 1; |
c4f3b63f | 122 | static int one_hundred = 100; |
af91322e DY |
123 | #ifdef CONFIG_PRINTK |
124 | static int ten_thousand = 10000; | |
125 | #endif | |
c4f3b63f | 126 | |
9e4a5bda AR |
127 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
128 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
129 | ||
1da177e4 LT |
130 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
131 | static int maxolduid = 65535; | |
132 | static int minolduid; | |
8ad4b1fb | 133 | static int min_percpu_pagelist_fract = 8; |
1da177e4 LT |
134 | |
135 | static int ngroups_max = NGROUPS_MAX; | |
136 | ||
d14f1729 DY |
137 | #ifdef CONFIG_INOTIFY_USER |
138 | #include <linux/inotify.h> | |
139 | #endif | |
72c57ed5 | 140 | #ifdef CONFIG_SPARC |
17f04fbb | 141 | #include <asm/system.h> |
1da177e4 LT |
142 | #endif |
143 | ||
0871420f DM |
144 | #ifdef CONFIG_SPARC64 |
145 | extern int sysctl_tsb_ratio; | |
146 | #endif | |
147 | ||
1da177e4 LT |
148 | #ifdef __hppa__ |
149 | extern int pwrsw_enabled; | |
150 | extern int unaligned_enabled; | |
151 | #endif | |
152 | ||
347a8dc3 | 153 | #ifdef CONFIG_S390 |
1da177e4 LT |
154 | #ifdef CONFIG_MATHEMU |
155 | extern int sysctl_ieee_emulation_warnings; | |
156 | #endif | |
157 | extern int sysctl_userprocess_debug; | |
951f22d5 | 158 | extern int spin_retry; |
1da177e4 LT |
159 | #endif |
160 | ||
d2b176ed JS |
161 | #ifdef CONFIG_IA64 |
162 | extern int no_unaligned_warning; | |
88fc241f | 163 | extern int unaligned_dump_stack; |
d2b176ed JS |
164 | #endif |
165 | ||
d6f8ff73 | 166 | #ifdef CONFIG_PROC_SYSCTL |
8d65af78 | 167 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 168 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 169 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 170 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 171 | #endif |
9ec52099 | 172 | |
97f5f0cd | 173 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 AW |
174 | /* Note: sysrq code uses it's own private copy */ |
175 | static int __sysrq_enabled = SYSRQ_DEFAULT_ENABLE; | |
97f5f0cd DT |
176 | |
177 | static int sysrq_sysctl_handler(ctl_table *table, int write, | |
178 | void __user *buffer, size_t *lenp, | |
179 | loff_t *ppos) | |
180 | { | |
181 | int error; | |
182 | ||
183 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
184 | if (error) | |
185 | return error; | |
186 | ||
187 | if (write) | |
188 | sysrq_toggle_support(__sysrq_enabled); | |
189 | ||
190 | return 0; | |
191 | } | |
192 | ||
193 | #endif | |
194 | ||
d8217f07 | 195 | static struct ctl_table root_table[]; |
e51b6ba0 EB |
196 | static struct ctl_table_root sysctl_table_root; |
197 | static struct ctl_table_header root_table_header = { | |
dfef6dcd | 198 | {{.count = 1, |
e51b6ba0 | 199 | .ctl_table = root_table, |
dfef6dcd | 200 | .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list),}}, |
e51b6ba0 | 201 | .root = &sysctl_table_root, |
73455092 | 202 | .set = &sysctl_table_root.default_set, |
e51b6ba0 EB |
203 | }; |
204 | static struct ctl_table_root sysctl_table_root = { | |
205 | .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list), | |
73455092 | 206 | .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry), |
e51b6ba0 | 207 | }; |
1da177e4 | 208 | |
d8217f07 EB |
209 | static struct ctl_table kern_table[]; |
210 | static struct ctl_table vm_table[]; | |
211 | static struct ctl_table fs_table[]; | |
212 | static struct ctl_table debug_table[]; | |
213 | static struct ctl_table dev_table[]; | |
214 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
215 | #ifdef CONFIG_EPOLL |
216 | extern struct ctl_table epoll_table[]; | |
217 | #endif | |
1da177e4 LT |
218 | |
219 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
220 | int sysctl_legacy_va_layout; | |
221 | #endif | |
222 | ||
1da177e4 LT |
223 | /* The default sysctl tables: */ |
224 | ||
d8217f07 | 225 | static struct ctl_table root_table[] = { |
1da177e4 | 226 | { |
1da177e4 LT |
227 | .procname = "kernel", |
228 | .mode = 0555, | |
229 | .child = kern_table, | |
230 | }, | |
231 | { | |
1da177e4 LT |
232 | .procname = "vm", |
233 | .mode = 0555, | |
234 | .child = vm_table, | |
235 | }, | |
1da177e4 | 236 | { |
1da177e4 LT |
237 | .procname = "fs", |
238 | .mode = 0555, | |
239 | .child = fs_table, | |
240 | }, | |
241 | { | |
1da177e4 LT |
242 | .procname = "debug", |
243 | .mode = 0555, | |
244 | .child = debug_table, | |
245 | }, | |
246 | { | |
1da177e4 LT |
247 | .procname = "dev", |
248 | .mode = 0555, | |
249 | .child = dev_table, | |
250 | }, | |
6fce56ec | 251 | { } |
1da177e4 LT |
252 | }; |
253 | ||
77e54a1f | 254 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
255 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
256 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
257 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
258 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
1983a922 CE |
259 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
260 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
77e54a1f IM |
261 | #endif |
262 | ||
5e771905 MG |
263 | #ifdef CONFIG_COMPACTION |
264 | static int min_extfrag_threshold; | |
265 | static int max_extfrag_threshold = 1000; | |
266 | #endif | |
267 | ||
d8217f07 | 268 | static struct ctl_table kern_table[] = { |
2bba22c5 | 269 | { |
2bba22c5 MG |
270 | .procname = "sched_child_runs_first", |
271 | .data = &sysctl_sched_child_runs_first, | |
272 | .maxlen = sizeof(unsigned int), | |
273 | .mode = 0644, | |
6d456111 | 274 | .proc_handler = proc_dointvec, |
2bba22c5 | 275 | }, |
77e54a1f IM |
276 | #ifdef CONFIG_SCHED_DEBUG |
277 | { | |
b2be5e96 PZ |
278 | .procname = "sched_min_granularity_ns", |
279 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
280 | .maxlen = sizeof(unsigned int), |
281 | .mode = 0644, | |
702a7c76 | 282 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
283 | .extra1 = &min_sched_granularity_ns, |
284 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 285 | }, |
21805085 | 286 | { |
21805085 PZ |
287 | .procname = "sched_latency_ns", |
288 | .data = &sysctl_sched_latency, | |
289 | .maxlen = sizeof(unsigned int), | |
290 | .mode = 0644, | |
702a7c76 | 291 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
292 | .extra1 = &min_sched_granularity_ns, |
293 | .extra2 = &max_sched_granularity_ns, | |
294 | }, | |
77e54a1f | 295 | { |
77e54a1f IM |
296 | .procname = "sched_wakeup_granularity_ns", |
297 | .data = &sysctl_sched_wakeup_granularity, | |
298 | .maxlen = sizeof(unsigned int), | |
299 | .mode = 0644, | |
702a7c76 | 300 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
301 | .extra1 = &min_wakeup_granularity_ns, |
302 | .extra2 = &max_wakeup_granularity_ns, | |
303 | }, | |
1983a922 | 304 | { |
1983a922 CE |
305 | .procname = "sched_tunable_scaling", |
306 | .data = &sysctl_sched_tunable_scaling, | |
307 | .maxlen = sizeof(enum sched_tunable_scaling), | |
308 | .mode = 0644, | |
702a7c76 | 309 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
310 | .extra1 = &min_sched_tunable_scaling, |
311 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 312 | }, |
da84d961 | 313 | { |
da84d961 IM |
314 | .procname = "sched_migration_cost", |
315 | .data = &sysctl_sched_migration_cost, | |
316 | .maxlen = sizeof(unsigned int), | |
317 | .mode = 0644, | |
6d456111 | 318 | .proc_handler = proc_dointvec, |
da84d961 | 319 | }, |
b82d9fdd | 320 | { |
b82d9fdd PZ |
321 | .procname = "sched_nr_migrate", |
322 | .data = &sysctl_sched_nr_migrate, | |
323 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 324 | .mode = 0644, |
6d456111 | 325 | .proc_handler = proc_dointvec, |
fa85ae24 | 326 | }, |
e9e9250b | 327 | { |
e9e9250b PZ |
328 | .procname = "sched_time_avg", |
329 | .data = &sysctl_sched_time_avg, | |
330 | .maxlen = sizeof(unsigned int), | |
331 | .mode = 0644, | |
6d456111 | 332 | .proc_handler = proc_dointvec, |
e9e9250b | 333 | }, |
a7a4f8a7 PT |
334 | { |
335 | .procname = "sched_shares_window", | |
336 | .data = &sysctl_sched_shares_window, | |
337 | .maxlen = sizeof(unsigned int), | |
338 | .mode = 0644, | |
339 | .proc_handler = proc_dointvec, | |
340 | }, | |
cd1bb94b | 341 | { |
cd1bb94b AB |
342 | .procname = "timer_migration", |
343 | .data = &sysctl_timer_migration, | |
344 | .maxlen = sizeof(unsigned int), | |
345 | .mode = 0644, | |
6d456111 | 346 | .proc_handler = proc_dointvec_minmax, |
bfdb4d9f AB |
347 | .extra1 = &zero, |
348 | .extra2 = &one, | |
fa85ae24 | 349 | }, |
1fc84aaa | 350 | #endif |
9f0c1e56 | 351 | { |
9f0c1e56 PZ |
352 | .procname = "sched_rt_period_us", |
353 | .data = &sysctl_sched_rt_period, | |
354 | .maxlen = sizeof(unsigned int), | |
355 | .mode = 0644, | |
6d456111 | 356 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
357 | }, |
358 | { | |
9f0c1e56 PZ |
359 | .procname = "sched_rt_runtime_us", |
360 | .data = &sysctl_sched_rt_runtime, | |
361 | .maxlen = sizeof(int), | |
362 | .mode = 0644, | |
6d456111 | 363 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 364 | }, |
5091faa4 MG |
365 | #ifdef CONFIG_SCHED_AUTOGROUP |
366 | { | |
367 | .procname = "sched_autogroup_enabled", | |
368 | .data = &sysctl_sched_autogroup_enabled, | |
369 | .maxlen = sizeof(unsigned int), | |
370 | .mode = 0644, | |
1747b21f | 371 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
372 | .extra1 = &zero, |
373 | .extra2 = &one, | |
374 | }, | |
375 | #endif | |
f20786ff PZ |
376 | #ifdef CONFIG_PROVE_LOCKING |
377 | { | |
f20786ff PZ |
378 | .procname = "prove_locking", |
379 | .data = &prove_locking, | |
380 | .maxlen = sizeof(int), | |
381 | .mode = 0644, | |
6d456111 | 382 | .proc_handler = proc_dointvec, |
f20786ff PZ |
383 | }, |
384 | #endif | |
385 | #ifdef CONFIG_LOCK_STAT | |
386 | { | |
f20786ff PZ |
387 | .procname = "lock_stat", |
388 | .data = &lock_stat, | |
389 | .maxlen = sizeof(int), | |
390 | .mode = 0644, | |
6d456111 | 391 | .proc_handler = proc_dointvec, |
f20786ff | 392 | }, |
77e54a1f | 393 | #endif |
1da177e4 | 394 | { |
1da177e4 LT |
395 | .procname = "panic", |
396 | .data = &panic_timeout, | |
397 | .maxlen = sizeof(int), | |
398 | .mode = 0644, | |
6d456111 | 399 | .proc_handler = proc_dointvec, |
1da177e4 LT |
400 | }, |
401 | { | |
1da177e4 LT |
402 | .procname = "core_uses_pid", |
403 | .data = &core_uses_pid, | |
404 | .maxlen = sizeof(int), | |
405 | .mode = 0644, | |
6d456111 | 406 | .proc_handler = proc_dointvec, |
1da177e4 LT |
407 | }, |
408 | { | |
1da177e4 LT |
409 | .procname = "core_pattern", |
410 | .data = core_pattern, | |
71ce92f3 | 411 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 412 | .mode = 0644, |
6d456111 | 413 | .proc_handler = proc_dostring, |
1da177e4 | 414 | }, |
a293980c | 415 | { |
a293980c NH |
416 | .procname = "core_pipe_limit", |
417 | .data = &core_pipe_limit, | |
418 | .maxlen = sizeof(unsigned int), | |
419 | .mode = 0644, | |
6d456111 | 420 | .proc_handler = proc_dointvec, |
a293980c | 421 | }, |
34f5a398 | 422 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 423 | { |
1da177e4 | 424 | .procname = "tainted", |
25ddbb18 | 425 | .maxlen = sizeof(long), |
34f5a398 | 426 | .mode = 0644, |
6d456111 | 427 | .proc_handler = proc_taint, |
1da177e4 | 428 | }, |
34f5a398 | 429 | #endif |
9745512c AV |
430 | #ifdef CONFIG_LATENCYTOP |
431 | { | |
432 | .procname = "latencytop", | |
433 | .data = &latencytop_enabled, | |
434 | .maxlen = sizeof(int), | |
435 | .mode = 0644, | |
6d456111 | 436 | .proc_handler = proc_dointvec, |
9745512c AV |
437 | }, |
438 | #endif | |
1da177e4 LT |
439 | #ifdef CONFIG_BLK_DEV_INITRD |
440 | { | |
1da177e4 LT |
441 | .procname = "real-root-dev", |
442 | .data = &real_root_dev, | |
443 | .maxlen = sizeof(int), | |
444 | .mode = 0644, | |
6d456111 | 445 | .proc_handler = proc_dointvec, |
1da177e4 LT |
446 | }, |
447 | #endif | |
45807a1d | 448 | { |
45807a1d IM |
449 | .procname = "print-fatal-signals", |
450 | .data = &print_fatal_signals, | |
451 | .maxlen = sizeof(int), | |
452 | .mode = 0644, | |
6d456111 | 453 | .proc_handler = proc_dointvec, |
45807a1d | 454 | }, |
72c57ed5 | 455 | #ifdef CONFIG_SPARC |
1da177e4 | 456 | { |
1da177e4 LT |
457 | .procname = "reboot-cmd", |
458 | .data = reboot_command, | |
459 | .maxlen = 256, | |
460 | .mode = 0644, | |
6d456111 | 461 | .proc_handler = proc_dostring, |
1da177e4 LT |
462 | }, |
463 | { | |
1da177e4 LT |
464 | .procname = "stop-a", |
465 | .data = &stop_a_enabled, | |
466 | .maxlen = sizeof (int), | |
467 | .mode = 0644, | |
6d456111 | 468 | .proc_handler = proc_dointvec, |
1da177e4 LT |
469 | }, |
470 | { | |
1da177e4 LT |
471 | .procname = "scons-poweroff", |
472 | .data = &scons_pwroff, | |
473 | .maxlen = sizeof (int), | |
474 | .mode = 0644, | |
6d456111 | 475 | .proc_handler = proc_dointvec, |
1da177e4 LT |
476 | }, |
477 | #endif | |
0871420f DM |
478 | #ifdef CONFIG_SPARC64 |
479 | { | |
0871420f DM |
480 | .procname = "tsb-ratio", |
481 | .data = &sysctl_tsb_ratio, | |
482 | .maxlen = sizeof (int), | |
483 | .mode = 0644, | |
6d456111 | 484 | .proc_handler = proc_dointvec, |
0871420f DM |
485 | }, |
486 | #endif | |
1da177e4 LT |
487 | #ifdef __hppa__ |
488 | { | |
1da177e4 LT |
489 | .procname = "soft-power", |
490 | .data = &pwrsw_enabled, | |
491 | .maxlen = sizeof (int), | |
492 | .mode = 0644, | |
6d456111 | 493 | .proc_handler = proc_dointvec, |
1da177e4 LT |
494 | }, |
495 | { | |
1da177e4 LT |
496 | .procname = "unaligned-trap", |
497 | .data = &unaligned_enabled, | |
498 | .maxlen = sizeof (int), | |
499 | .mode = 0644, | |
6d456111 | 500 | .proc_handler = proc_dointvec, |
1da177e4 LT |
501 | }, |
502 | #endif | |
503 | { | |
1da177e4 LT |
504 | .procname = "ctrl-alt-del", |
505 | .data = &C_A_D, | |
506 | .maxlen = sizeof(int), | |
507 | .mode = 0644, | |
6d456111 | 508 | .proc_handler = proc_dointvec, |
1da177e4 | 509 | }, |
606576ce | 510 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 511 | { |
b0fc494f SR |
512 | .procname = "ftrace_enabled", |
513 | .data = &ftrace_enabled, | |
514 | .maxlen = sizeof(int), | |
515 | .mode = 0644, | |
6d456111 | 516 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
517 | }, |
518 | #endif | |
f38f1d2a SR |
519 | #ifdef CONFIG_STACK_TRACER |
520 | { | |
f38f1d2a SR |
521 | .procname = "stack_tracer_enabled", |
522 | .data = &stack_tracer_enabled, | |
523 | .maxlen = sizeof(int), | |
524 | .mode = 0644, | |
6d456111 | 525 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
526 | }, |
527 | #endif | |
944ac425 SR |
528 | #ifdef CONFIG_TRACING |
529 | { | |
3299b4dd | 530 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
531 | .data = &ftrace_dump_on_oops, |
532 | .maxlen = sizeof(int), | |
533 | .mode = 0644, | |
6d456111 | 534 | .proc_handler = proc_dointvec, |
944ac425 SR |
535 | }, |
536 | #endif | |
a1ef5adb | 537 | #ifdef CONFIG_MODULES |
1da177e4 | 538 | { |
1da177e4 LT |
539 | .procname = "modprobe", |
540 | .data = &modprobe_path, | |
541 | .maxlen = KMOD_PATH_LEN, | |
542 | .mode = 0644, | |
6d456111 | 543 | .proc_handler = proc_dostring, |
1da177e4 | 544 | }, |
3d43321b | 545 | { |
3d43321b KC |
546 | .procname = "modules_disabled", |
547 | .data = &modules_disabled, | |
548 | .maxlen = sizeof(int), | |
549 | .mode = 0644, | |
550 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 551 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
552 | .extra1 = &one, |
553 | .extra2 = &one, | |
554 | }, | |
1da177e4 | 555 | #endif |
94f17cd7 | 556 | #ifdef CONFIG_HOTPLUG |
1da177e4 | 557 | { |
1da177e4 | 558 | .procname = "hotplug", |
312c004d KS |
559 | .data = &uevent_helper, |
560 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 561 | .mode = 0644, |
6d456111 | 562 | .proc_handler = proc_dostring, |
1da177e4 LT |
563 | }, |
564 | #endif | |
565 | #ifdef CONFIG_CHR_DEV_SG | |
566 | { | |
1da177e4 LT |
567 | .procname = "sg-big-buff", |
568 | .data = &sg_big_buff, | |
569 | .maxlen = sizeof (int), | |
570 | .mode = 0444, | |
6d456111 | 571 | .proc_handler = proc_dointvec, |
1da177e4 LT |
572 | }, |
573 | #endif | |
574 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
575 | { | |
1da177e4 LT |
576 | .procname = "acct", |
577 | .data = &acct_parm, | |
578 | .maxlen = 3*sizeof(int), | |
579 | .mode = 0644, | |
6d456111 | 580 | .proc_handler = proc_dointvec, |
1da177e4 LT |
581 | }, |
582 | #endif | |
1da177e4 LT |
583 | #ifdef CONFIG_MAGIC_SYSRQ |
584 | { | |
1da177e4 | 585 | .procname = "sysrq", |
5d6f647f | 586 | .data = &__sysrq_enabled, |
1da177e4 LT |
587 | .maxlen = sizeof (int), |
588 | .mode = 0644, | |
97f5f0cd | 589 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
590 | }, |
591 | #endif | |
d6f8ff73 | 592 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 593 | { |
1da177e4 | 594 | .procname = "cad_pid", |
9ec52099 | 595 | .data = NULL, |
1da177e4 LT |
596 | .maxlen = sizeof (int), |
597 | .mode = 0600, | |
6d456111 | 598 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 599 | }, |
d6f8ff73 | 600 | #endif |
1da177e4 | 601 | { |
1da177e4 LT |
602 | .procname = "threads-max", |
603 | .data = &max_threads, | |
604 | .maxlen = sizeof(int), | |
605 | .mode = 0644, | |
6d456111 | 606 | .proc_handler = proc_dointvec, |
1da177e4 LT |
607 | }, |
608 | { | |
1da177e4 LT |
609 | .procname = "random", |
610 | .mode = 0555, | |
611 | .child = random_table, | |
612 | }, | |
1da177e4 | 613 | { |
1da177e4 LT |
614 | .procname = "overflowuid", |
615 | .data = &overflowuid, | |
616 | .maxlen = sizeof(int), | |
617 | .mode = 0644, | |
6d456111 | 618 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
619 | .extra1 = &minolduid, |
620 | .extra2 = &maxolduid, | |
621 | }, | |
622 | { | |
1da177e4 LT |
623 | .procname = "overflowgid", |
624 | .data = &overflowgid, | |
625 | .maxlen = sizeof(int), | |
626 | .mode = 0644, | |
6d456111 | 627 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
628 | .extra1 = &minolduid, |
629 | .extra2 = &maxolduid, | |
630 | }, | |
347a8dc3 | 631 | #ifdef CONFIG_S390 |
1da177e4 LT |
632 | #ifdef CONFIG_MATHEMU |
633 | { | |
1da177e4 LT |
634 | .procname = "ieee_emulation_warnings", |
635 | .data = &sysctl_ieee_emulation_warnings, | |
636 | .maxlen = sizeof(int), | |
637 | .mode = 0644, | |
6d456111 | 638 | .proc_handler = proc_dointvec, |
1da177e4 | 639 | }, |
1da177e4 LT |
640 | #endif |
641 | { | |
1da177e4 | 642 | .procname = "userprocess_debug", |
ab3c68ee | 643 | .data = &show_unhandled_signals, |
1da177e4 LT |
644 | .maxlen = sizeof(int), |
645 | .mode = 0644, | |
6d456111 | 646 | .proc_handler = proc_dointvec, |
1da177e4 LT |
647 | }, |
648 | #endif | |
649 | { | |
1da177e4 LT |
650 | .procname = "pid_max", |
651 | .data = &pid_max, | |
652 | .maxlen = sizeof (int), | |
653 | .mode = 0644, | |
6d456111 | 654 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
655 | .extra1 = &pid_max_min, |
656 | .extra2 = &pid_max_max, | |
657 | }, | |
658 | { | |
1da177e4 LT |
659 | .procname = "panic_on_oops", |
660 | .data = &panic_on_oops, | |
661 | .maxlen = sizeof(int), | |
662 | .mode = 0644, | |
6d456111 | 663 | .proc_handler = proc_dointvec, |
1da177e4 | 664 | }, |
7ef3d2fd JP |
665 | #if defined CONFIG_PRINTK |
666 | { | |
7ef3d2fd JP |
667 | .procname = "printk", |
668 | .data = &console_loglevel, | |
669 | .maxlen = 4*sizeof(int), | |
670 | .mode = 0644, | |
6d456111 | 671 | .proc_handler = proc_dointvec, |
7ef3d2fd | 672 | }, |
1da177e4 | 673 | { |
1da177e4 | 674 | .procname = "printk_ratelimit", |
717115e1 | 675 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
676 | .maxlen = sizeof(int), |
677 | .mode = 0644, | |
6d456111 | 678 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
679 | }, |
680 | { | |
1da177e4 | 681 | .procname = "printk_ratelimit_burst", |
717115e1 | 682 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
683 | .maxlen = sizeof(int), |
684 | .mode = 0644, | |
6d456111 | 685 | .proc_handler = proc_dointvec, |
1da177e4 | 686 | }, |
af91322e | 687 | { |
af91322e DY |
688 | .procname = "printk_delay", |
689 | .data = &printk_delay_msec, | |
690 | .maxlen = sizeof(int), | |
691 | .mode = 0644, | |
6d456111 | 692 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
693 | .extra1 = &zero, |
694 | .extra2 = &ten_thousand, | |
695 | }, | |
eaf06b24 DR |
696 | { |
697 | .procname = "dmesg_restrict", | |
698 | .data = &dmesg_restrict, | |
699 | .maxlen = sizeof(int), | |
700 | .mode = 0644, | |
701 | .proc_handler = proc_dointvec_minmax, | |
702 | .extra1 = &zero, | |
703 | .extra2 = &one, | |
704 | }, | |
455cd5ab DR |
705 | { |
706 | .procname = "kptr_restrict", | |
707 | .data = &kptr_restrict, | |
708 | .maxlen = sizeof(int), | |
709 | .mode = 0644, | |
710 | .proc_handler = proc_dointvec_minmax, | |
711 | .extra1 = &zero, | |
712 | .extra2 = &two, | |
713 | }, | |
df6e61d4 | 714 | #endif |
1da177e4 | 715 | { |
1da177e4 LT |
716 | .procname = "ngroups_max", |
717 | .data = &ngroups_max, | |
718 | .maxlen = sizeof (int), | |
719 | .mode = 0444, | |
6d456111 | 720 | .proc_handler = proc_dointvec, |
1da177e4 | 721 | }, |
58687acb | 722 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 723 | { |
58687acb DZ |
724 | .procname = "watchdog", |
725 | .data = &watchdog_enabled, | |
504d7cf1 DZ |
726 | .maxlen = sizeof (int), |
727 | .mode = 0644, | |
58687acb DZ |
728 | .proc_handler = proc_dowatchdog_enabled, |
729 | }, | |
730 | { | |
731 | .procname = "watchdog_thresh", | |
732 | .data = &softlockup_thresh, | |
733 | .maxlen = sizeof(int), | |
734 | .mode = 0644, | |
735 | .proc_handler = proc_dowatchdog_thresh, | |
736 | .extra1 = &neg_one, | |
737 | .extra2 = &sixty, | |
504d7cf1 | 738 | }, |
2508ce18 DZ |
739 | { |
740 | .procname = "softlockup_panic", | |
741 | .data = &softlockup_panic, | |
742 | .maxlen = sizeof(int), | |
743 | .mode = 0644, | |
744 | .proc_handler = proc_dointvec_minmax, | |
745 | .extra1 = &zero, | |
746 | .extra2 = &one, | |
747 | }, | |
5dc30558 DZ |
748 | { |
749 | .procname = "nmi_watchdog", | |
750 | .data = &watchdog_enabled, | |
751 | .maxlen = sizeof (int), | |
752 | .mode = 0644, | |
753 | .proc_handler = proc_dowatchdog_enabled, | |
754 | }, | |
755 | #endif | |
756 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
757 | { | |
758 | .procname = "unknown_nmi_panic", | |
759 | .data = &unknown_nmi_panic, | |
760 | .maxlen = sizeof (int), | |
761 | .mode = 0644, | |
762 | .proc_handler = proc_dointvec, | |
763 | }, | |
504d7cf1 | 764 | #endif |
1da177e4 | 765 | #if defined(CONFIG_X86) |
8da5adda | 766 | { |
8da5adda DZ |
767 | .procname = "panic_on_unrecovered_nmi", |
768 | .data = &panic_on_unrecovered_nmi, | |
769 | .maxlen = sizeof(int), | |
770 | .mode = 0644, | |
6d456111 | 771 | .proc_handler = proc_dointvec, |
8da5adda | 772 | }, |
5211a242 | 773 | { |
5211a242 KG |
774 | .procname = "panic_on_io_nmi", |
775 | .data = &panic_on_io_nmi, | |
776 | .maxlen = sizeof(int), | |
777 | .mode = 0644, | |
6d456111 | 778 | .proc_handler = proc_dointvec, |
5211a242 | 779 | }, |
1da177e4 | 780 | { |
1da177e4 LT |
781 | .procname = "bootloader_type", |
782 | .data = &bootloader_type, | |
783 | .maxlen = sizeof (int), | |
784 | .mode = 0444, | |
6d456111 | 785 | .proc_handler = proc_dointvec, |
1da177e4 | 786 | }, |
5031296c | 787 | { |
5031296c PA |
788 | .procname = "bootloader_version", |
789 | .data = &bootloader_version, | |
790 | .maxlen = sizeof (int), | |
791 | .mode = 0444, | |
6d456111 | 792 | .proc_handler = proc_dointvec, |
5031296c | 793 | }, |
0741f4d2 | 794 | { |
0741f4d2 CE |
795 | .procname = "kstack_depth_to_print", |
796 | .data = &kstack_depth_to_print, | |
797 | .maxlen = sizeof(int), | |
798 | .mode = 0644, | |
6d456111 | 799 | .proc_handler = proc_dointvec, |
0741f4d2 | 800 | }, |
6e7c4025 | 801 | { |
6e7c4025 IM |
802 | .procname = "io_delay_type", |
803 | .data = &io_delay_type, | |
804 | .maxlen = sizeof(int), | |
805 | .mode = 0644, | |
6d456111 | 806 | .proc_handler = proc_dointvec, |
6e7c4025 | 807 | }, |
1da177e4 | 808 | #endif |
7a9166e3 | 809 | #if defined(CONFIG_MMU) |
1da177e4 | 810 | { |
1da177e4 LT |
811 | .procname = "randomize_va_space", |
812 | .data = &randomize_va_space, | |
813 | .maxlen = sizeof(int), | |
814 | .mode = 0644, | |
6d456111 | 815 | .proc_handler = proc_dointvec, |
1da177e4 | 816 | }, |
7a9166e3 | 817 | #endif |
0152fb37 | 818 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 819 | { |
951f22d5 MS |
820 | .procname = "spin_retry", |
821 | .data = &spin_retry, | |
822 | .maxlen = sizeof (int), | |
823 | .mode = 0644, | |
6d456111 | 824 | .proc_handler = proc_dointvec, |
951f22d5 | 825 | }, |
c255d844 | 826 | #endif |
673d5b43 | 827 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 828 | { |
c255d844 | 829 | .procname = "acpi_video_flags", |
77afcf78 | 830 | .data = &acpi_realmode_flags, |
c255d844 PM |
831 | .maxlen = sizeof (unsigned long), |
832 | .mode = 0644, | |
6d456111 | 833 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 834 | }, |
d2b176ed JS |
835 | #endif |
836 | #ifdef CONFIG_IA64 | |
837 | { | |
d2b176ed JS |
838 | .procname = "ignore-unaligned-usertrap", |
839 | .data = &no_unaligned_warning, | |
840 | .maxlen = sizeof (int), | |
841 | .mode = 0644, | |
6d456111 | 842 | .proc_handler = proc_dointvec, |
d2b176ed | 843 | }, |
88fc241f | 844 | { |
88fc241f DC |
845 | .procname = "unaligned-dump-stack", |
846 | .data = &unaligned_dump_stack, | |
847 | .maxlen = sizeof (int), | |
848 | .mode = 0644, | |
6d456111 | 849 | .proc_handler = proc_dointvec, |
88fc241f | 850 | }, |
bebfa101 | 851 | #endif |
e162b39a MSB |
852 | #ifdef CONFIG_DETECT_HUNG_TASK |
853 | { | |
e162b39a MSB |
854 | .procname = "hung_task_panic", |
855 | .data = &sysctl_hung_task_panic, | |
856 | .maxlen = sizeof(int), | |
857 | .mode = 0644, | |
6d456111 | 858 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
859 | .extra1 = &zero, |
860 | .extra2 = &one, | |
861 | }, | |
82a1fcb9 | 862 | { |
82a1fcb9 IM |
863 | .procname = "hung_task_check_count", |
864 | .data = &sysctl_hung_task_check_count, | |
90739081 | 865 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 866 | .mode = 0644, |
6d456111 | 867 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 IM |
868 | }, |
869 | { | |
82a1fcb9 IM |
870 | .procname = "hung_task_timeout_secs", |
871 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 872 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 873 | .mode = 0644, |
6d456111 | 874 | .proc_handler = proc_dohung_task_timeout_secs, |
82a1fcb9 IM |
875 | }, |
876 | { | |
82a1fcb9 IM |
877 | .procname = "hung_task_warnings", |
878 | .data = &sysctl_hung_task_warnings, | |
90739081 | 879 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 880 | .mode = 0644, |
6d456111 | 881 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 | 882 | }, |
c4f3b63f | 883 | #endif |
bebfa101 AK |
884 | #ifdef CONFIG_COMPAT |
885 | { | |
bebfa101 AK |
886 | .procname = "compat-log", |
887 | .data = &compat_log, | |
888 | .maxlen = sizeof (int), | |
889 | .mode = 0644, | |
6d456111 | 890 | .proc_handler = proc_dointvec, |
bebfa101 | 891 | }, |
951f22d5 | 892 | #endif |
23f78d4a IM |
893 | #ifdef CONFIG_RT_MUTEXES |
894 | { | |
23f78d4a IM |
895 | .procname = "max_lock_depth", |
896 | .data = &max_lock_depth, | |
897 | .maxlen = sizeof(int), | |
898 | .mode = 0644, | |
6d456111 | 899 | .proc_handler = proc_dointvec, |
23f78d4a | 900 | }, |
5096add8 | 901 | #endif |
10a0a8d4 | 902 | { |
10a0a8d4 JF |
903 | .procname = "poweroff_cmd", |
904 | .data = &poweroff_cmd, | |
905 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
906 | .mode = 0644, | |
6d456111 | 907 | .proc_handler = proc_dostring, |
10a0a8d4 | 908 | }, |
0b77f5bf DH |
909 | #ifdef CONFIG_KEYS |
910 | { | |
0b77f5bf DH |
911 | .procname = "keys", |
912 | .mode = 0555, | |
913 | .child = key_sysctls, | |
914 | }, | |
915 | #endif | |
31a72bce PM |
916 | #ifdef CONFIG_RCU_TORTURE_TEST |
917 | { | |
31a72bce PM |
918 | .procname = "rcutorture_runnable", |
919 | .data = &rcutorture_runnable, | |
920 | .maxlen = sizeof(int), | |
921 | .mode = 0644, | |
6d456111 | 922 | .proc_handler = proc_dointvec, |
31a72bce PM |
923 | }, |
924 | #endif | |
cdd6c482 | 925 | #ifdef CONFIG_PERF_EVENTS |
1ccd1549 | 926 | { |
cdd6c482 IM |
927 | .procname = "perf_event_paranoid", |
928 | .data = &sysctl_perf_event_paranoid, | |
929 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 930 | .mode = 0644, |
6d456111 | 931 | .proc_handler = proc_dointvec, |
1ccd1549 | 932 | }, |
c5078f78 | 933 | { |
cdd6c482 IM |
934 | .procname = "perf_event_mlock_kb", |
935 | .data = &sysctl_perf_event_mlock, | |
936 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 937 | .mode = 0644, |
6d456111 | 938 | .proc_handler = proc_dointvec, |
c5078f78 | 939 | }, |
a78ac325 | 940 | { |
cdd6c482 IM |
941 | .procname = "perf_event_max_sample_rate", |
942 | .data = &sysctl_perf_event_sample_rate, | |
943 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 944 | .mode = 0644, |
163ec435 | 945 | .proc_handler = perf_proc_update_handler, |
a78ac325 | 946 | }, |
1ccd1549 | 947 | #endif |
dfec072e VN |
948 | #ifdef CONFIG_KMEMCHECK |
949 | { | |
dfec072e VN |
950 | .procname = "kmemcheck", |
951 | .data = &kmemcheck_enabled, | |
952 | .maxlen = sizeof(int), | |
953 | .mode = 0644, | |
6d456111 | 954 | .proc_handler = proc_dointvec, |
dfec072e VN |
955 | }, |
956 | #endif | |
cb684b5b | 957 | #ifdef CONFIG_BLOCK |
5e605b64 | 958 | { |
5e605b64 JA |
959 | .procname = "blk_iopoll", |
960 | .data = &blk_iopoll_enabled, | |
961 | .maxlen = sizeof(int), | |
962 | .mode = 0644, | |
6d456111 | 963 | .proc_handler = proc_dointvec, |
5e605b64 | 964 | }, |
cb684b5b | 965 | #endif |
6fce56ec | 966 | { } |
1da177e4 LT |
967 | }; |
968 | ||
d8217f07 | 969 | static struct ctl_table vm_table[] = { |
1da177e4 | 970 | { |
1da177e4 LT |
971 | .procname = "overcommit_memory", |
972 | .data = &sysctl_overcommit_memory, | |
973 | .maxlen = sizeof(sysctl_overcommit_memory), | |
974 | .mode = 0644, | |
cb16e95f PH |
975 | .proc_handler = proc_dointvec_minmax, |
976 | .extra1 = &zero, | |
977 | .extra2 = &two, | |
1da177e4 | 978 | }, |
fadd8fbd | 979 | { |
fadd8fbd KH |
980 | .procname = "panic_on_oom", |
981 | .data = &sysctl_panic_on_oom, | |
982 | .maxlen = sizeof(sysctl_panic_on_oom), | |
983 | .mode = 0644, | |
cb16e95f PH |
984 | .proc_handler = proc_dointvec_minmax, |
985 | .extra1 = &zero, | |
986 | .extra2 = &two, | |
fadd8fbd | 987 | }, |
fe071d7e | 988 | { |
fe071d7e DR |
989 | .procname = "oom_kill_allocating_task", |
990 | .data = &sysctl_oom_kill_allocating_task, | |
991 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
992 | .mode = 0644, | |
6d456111 | 993 | .proc_handler = proc_dointvec, |
fe071d7e | 994 | }, |
fef1bdd6 | 995 | { |
fef1bdd6 DR |
996 | .procname = "oom_dump_tasks", |
997 | .data = &sysctl_oom_dump_tasks, | |
998 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
999 | .mode = 0644, | |
6d456111 | 1000 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1001 | }, |
1da177e4 | 1002 | { |
1da177e4 LT |
1003 | .procname = "overcommit_ratio", |
1004 | .data = &sysctl_overcommit_ratio, | |
1005 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1006 | .mode = 0644, | |
6d456111 | 1007 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1008 | }, |
1009 | { | |
1da177e4 LT |
1010 | .procname = "page-cluster", |
1011 | .data = &page_cluster, | |
1012 | .maxlen = sizeof(int), | |
1013 | .mode = 0644, | |
cb16e95f PH |
1014 | .proc_handler = proc_dointvec_minmax, |
1015 | .extra1 = &zero, | |
1da177e4 LT |
1016 | }, |
1017 | { | |
1da177e4 LT |
1018 | .procname = "dirty_background_ratio", |
1019 | .data = &dirty_background_ratio, | |
1020 | .maxlen = sizeof(dirty_background_ratio), | |
1021 | .mode = 0644, | |
6d456111 | 1022 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1023 | .extra1 = &zero, |
1024 | .extra2 = &one_hundred, | |
1025 | }, | |
2da02997 | 1026 | { |
2da02997 DR |
1027 | .procname = "dirty_background_bytes", |
1028 | .data = &dirty_background_bytes, | |
1029 | .maxlen = sizeof(dirty_background_bytes), | |
1030 | .mode = 0644, | |
6d456111 | 1031 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1032 | .extra1 = &one_ul, |
2da02997 | 1033 | }, |
1da177e4 | 1034 | { |
1da177e4 LT |
1035 | .procname = "dirty_ratio", |
1036 | .data = &vm_dirty_ratio, | |
1037 | .maxlen = sizeof(vm_dirty_ratio), | |
1038 | .mode = 0644, | |
6d456111 | 1039 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1040 | .extra1 = &zero, |
1041 | .extra2 = &one_hundred, | |
1042 | }, | |
2da02997 | 1043 | { |
2da02997 DR |
1044 | .procname = "dirty_bytes", |
1045 | .data = &vm_dirty_bytes, | |
1046 | .maxlen = sizeof(vm_dirty_bytes), | |
1047 | .mode = 0644, | |
6d456111 | 1048 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1049 | .extra1 = &dirty_bytes_min, |
2da02997 | 1050 | }, |
1da177e4 | 1051 | { |
1da177e4 | 1052 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1053 | .data = &dirty_writeback_interval, |
1054 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1055 | .mode = 0644, |
6d456111 | 1056 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1057 | }, |
1058 | { | |
1da177e4 | 1059 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1060 | .data = &dirty_expire_interval, |
1061 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1062 | .mode = 0644, |
cb16e95f PH |
1063 | .proc_handler = proc_dointvec_minmax, |
1064 | .extra1 = &zero, | |
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, | |
cb16e95f PH |
1140 | .extra1 = &one, |
1141 | .extra2 = &three, | |
9d0243bc | 1142 | }, |
76ab0f53 MG |
1143 | #ifdef CONFIG_COMPACTION |
1144 | { | |
1145 | .procname = "compact_memory", | |
1146 | .data = &sysctl_compact_memory, | |
1147 | .maxlen = sizeof(int), | |
1148 | .mode = 0200, | |
1149 | .proc_handler = sysctl_compaction_handler, | |
1150 | }, | |
5e771905 MG |
1151 | { |
1152 | .procname = "extfrag_threshold", | |
1153 | .data = &sysctl_extfrag_threshold, | |
1154 | .maxlen = sizeof(int), | |
1155 | .mode = 0644, | |
1156 | .proc_handler = sysctl_extfrag_handler, | |
1157 | .extra1 = &min_extfrag_threshold, | |
1158 | .extra2 = &max_extfrag_threshold, | |
1159 | }, | |
1160 | ||
76ab0f53 | 1161 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1162 | { |
1da177e4 LT |
1163 | .procname = "min_free_kbytes", |
1164 | .data = &min_free_kbytes, | |
1165 | .maxlen = sizeof(min_free_kbytes), | |
1166 | .mode = 0644, | |
6d456111 | 1167 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1168 | .extra1 = &zero, |
1169 | }, | |
8ad4b1fb | 1170 | { |
8ad4b1fb RS |
1171 | .procname = "percpu_pagelist_fraction", |
1172 | .data = &percpu_pagelist_fraction, | |
1173 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1174 | .mode = 0644, | |
6d456111 | 1175 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
8ad4b1fb RS |
1176 | .extra1 = &min_percpu_pagelist_fract, |
1177 | }, | |
1da177e4 LT |
1178 | #ifdef CONFIG_MMU |
1179 | { | |
1da177e4 LT |
1180 | .procname = "max_map_count", |
1181 | .data = &sysctl_max_map_count, | |
1182 | .maxlen = sizeof(sysctl_max_map_count), | |
1183 | .mode = 0644, | |
3e26120c | 1184 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1185 | .extra1 = &zero, |
1da177e4 | 1186 | }, |
dd8632a1 PM |
1187 | #else |
1188 | { | |
dd8632a1 PM |
1189 | .procname = "nr_trim_pages", |
1190 | .data = &sysctl_nr_trim_pages, | |
1191 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1192 | .mode = 0644, | |
6d456111 | 1193 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1194 | .extra1 = &zero, |
1195 | }, | |
1da177e4 LT |
1196 | #endif |
1197 | { | |
1da177e4 LT |
1198 | .procname = "laptop_mode", |
1199 | .data = &laptop_mode, | |
1200 | .maxlen = sizeof(laptop_mode), | |
1201 | .mode = 0644, | |
6d456111 | 1202 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1203 | }, |
1204 | { | |
1da177e4 LT |
1205 | .procname = "block_dump", |
1206 | .data = &block_dump, | |
1207 | .maxlen = sizeof(block_dump), | |
1208 | .mode = 0644, | |
6d456111 | 1209 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1210 | .extra1 = &zero, |
1211 | }, | |
1212 | { | |
1da177e4 LT |
1213 | .procname = "vfs_cache_pressure", |
1214 | .data = &sysctl_vfs_cache_pressure, | |
1215 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1216 | .mode = 0644, | |
6d456111 | 1217 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1218 | .extra1 = &zero, |
1219 | }, | |
1220 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1221 | { | |
1da177e4 LT |
1222 | .procname = "legacy_va_layout", |
1223 | .data = &sysctl_legacy_va_layout, | |
1224 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1225 | .mode = 0644, | |
6d456111 | 1226 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1227 | .extra1 = &zero, |
1228 | }, | |
1229 | #endif | |
1743660b CL |
1230 | #ifdef CONFIG_NUMA |
1231 | { | |
1743660b CL |
1232 | .procname = "zone_reclaim_mode", |
1233 | .data = &zone_reclaim_mode, | |
1234 | .maxlen = sizeof(zone_reclaim_mode), | |
1235 | .mode = 0644, | |
6d456111 | 1236 | .proc_handler = proc_dointvec, |
c84db23c | 1237 | .extra1 = &zero, |
1743660b | 1238 | }, |
9614634f | 1239 | { |
9614634f CL |
1240 | .procname = "min_unmapped_ratio", |
1241 | .data = &sysctl_min_unmapped_ratio, | |
1242 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1243 | .mode = 0644, | |
6d456111 | 1244 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1245 | .extra1 = &zero, |
1246 | .extra2 = &one_hundred, | |
1247 | }, | |
0ff38490 | 1248 | { |
0ff38490 CL |
1249 | .procname = "min_slab_ratio", |
1250 | .data = &sysctl_min_slab_ratio, | |
1251 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1252 | .mode = 0644, | |
6d456111 | 1253 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1254 | .extra1 = &zero, |
1255 | .extra2 = &one_hundred, | |
1256 | }, | |
e6e5494c | 1257 | #endif |
77461ab3 CL |
1258 | #ifdef CONFIG_SMP |
1259 | { | |
77461ab3 CL |
1260 | .procname = "stat_interval", |
1261 | .data = &sysctl_stat_interval, | |
1262 | .maxlen = sizeof(sysctl_stat_interval), | |
1263 | .mode = 0644, | |
6d456111 | 1264 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1265 | }, |
1266 | #endif | |
6e141546 | 1267 | #ifdef CONFIG_MMU |
ed032189 | 1268 | { |
ed032189 | 1269 | .procname = "mmap_min_addr", |
788084ab EP |
1270 | .data = &dac_mmap_min_addr, |
1271 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1272 | .mode = 0644, |
6d456111 | 1273 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1274 | }, |
6e141546 | 1275 | #endif |
f0c0b2b8 KH |
1276 | #ifdef CONFIG_NUMA |
1277 | { | |
f0c0b2b8 KH |
1278 | .procname = "numa_zonelist_order", |
1279 | .data = &numa_zonelist_order, | |
1280 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1281 | .mode = 0644, | |
6d456111 | 1282 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1283 | }, |
1284 | #endif | |
2b8232ce | 1285 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1286 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1287 | { |
e6e5494c IM |
1288 | .procname = "vdso_enabled", |
1289 | .data = &vdso_enabled, | |
1290 | .maxlen = sizeof(vdso_enabled), | |
1291 | .mode = 0644, | |
6d456111 | 1292 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1293 | .extra1 = &zero, |
1294 | }, | |
1da177e4 | 1295 | #endif |
195cf453 BG |
1296 | #ifdef CONFIG_HIGHMEM |
1297 | { | |
195cf453 BG |
1298 | .procname = "highmem_is_dirtyable", |
1299 | .data = &vm_highmem_is_dirtyable, | |
1300 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1301 | .mode = 0644, | |
6d456111 | 1302 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1303 | .extra1 = &zero, |
1304 | .extra2 = &one, | |
1305 | }, | |
1306 | #endif | |
4be6f6bb | 1307 | { |
4be6f6bb PZ |
1308 | .procname = "scan_unevictable_pages", |
1309 | .data = &scan_unevictable_pages, | |
1310 | .maxlen = sizeof(scan_unevictable_pages), | |
1311 | .mode = 0644, | |
6d456111 | 1312 | .proc_handler = scan_unevictable_handler, |
4be6f6bb | 1313 | }, |
6a46079c AK |
1314 | #ifdef CONFIG_MEMORY_FAILURE |
1315 | { | |
6a46079c AK |
1316 | .procname = "memory_failure_early_kill", |
1317 | .data = &sysctl_memory_failure_early_kill, | |
1318 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1319 | .mode = 0644, | |
6d456111 | 1320 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1321 | .extra1 = &zero, |
1322 | .extra2 = &one, | |
1323 | }, | |
1324 | { | |
6a46079c AK |
1325 | .procname = "memory_failure_recovery", |
1326 | .data = &sysctl_memory_failure_recovery, | |
1327 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1328 | .mode = 0644, | |
6d456111 | 1329 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1330 | .extra1 = &zero, |
1331 | .extra2 = &one, | |
1332 | }, | |
1333 | #endif | |
6fce56ec | 1334 | { } |
1da177e4 LT |
1335 | }; |
1336 | ||
2abc26fc | 1337 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1338 | static struct ctl_table binfmt_misc_table[] = { |
6fce56ec | 1339 | { } |
2abc26fc EB |
1340 | }; |
1341 | #endif | |
1342 | ||
d8217f07 | 1343 | static struct ctl_table fs_table[] = { |
1da177e4 | 1344 | { |
1da177e4 LT |
1345 | .procname = "inode-nr", |
1346 | .data = &inodes_stat, | |
1347 | .maxlen = 2*sizeof(int), | |
1348 | .mode = 0444, | |
cffbc8aa | 1349 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1350 | }, |
1351 | { | |
1da177e4 LT |
1352 | .procname = "inode-state", |
1353 | .data = &inodes_stat, | |
1354 | .maxlen = 7*sizeof(int), | |
1355 | .mode = 0444, | |
cffbc8aa | 1356 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1357 | }, |
1358 | { | |
1da177e4 LT |
1359 | .procname = "file-nr", |
1360 | .data = &files_stat, | |
518de9b3 | 1361 | .maxlen = sizeof(files_stat), |
1da177e4 | 1362 | .mode = 0444, |
6d456111 | 1363 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1364 | }, |
1365 | { | |
1da177e4 LT |
1366 | .procname = "file-max", |
1367 | .data = &files_stat.max_files, | |
518de9b3 | 1368 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1369 | .mode = 0644, |
518de9b3 | 1370 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1371 | }, |
9cfe015a | 1372 | { |
9cfe015a ED |
1373 | .procname = "nr_open", |
1374 | .data = &sysctl_nr_open, | |
1375 | .maxlen = sizeof(int), | |
1376 | .mode = 0644, | |
6d456111 | 1377 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1378 | .extra1 = &sysctl_nr_open_min, |
1379 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1380 | }, |
1da177e4 | 1381 | { |
1da177e4 LT |
1382 | .procname = "dentry-state", |
1383 | .data = &dentry_stat, | |
1384 | .maxlen = 6*sizeof(int), | |
1385 | .mode = 0444, | |
312d3ca8 | 1386 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1387 | }, |
1388 | { | |
1da177e4 LT |
1389 | .procname = "overflowuid", |
1390 | .data = &fs_overflowuid, | |
1391 | .maxlen = sizeof(int), | |
1392 | .mode = 0644, | |
6d456111 | 1393 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1394 | .extra1 = &minolduid, |
1395 | .extra2 = &maxolduid, | |
1396 | }, | |
1397 | { | |
1da177e4 LT |
1398 | .procname = "overflowgid", |
1399 | .data = &fs_overflowgid, | |
1400 | .maxlen = sizeof(int), | |
1401 | .mode = 0644, | |
6d456111 | 1402 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1403 | .extra1 = &minolduid, |
1404 | .extra2 = &maxolduid, | |
1405 | }, | |
bfcd17a6 | 1406 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1407 | { |
1da177e4 LT |
1408 | .procname = "leases-enable", |
1409 | .data = &leases_enable, | |
1410 | .maxlen = sizeof(int), | |
1411 | .mode = 0644, | |
6d456111 | 1412 | .proc_handler = proc_dointvec, |
1da177e4 | 1413 | }, |
bfcd17a6 | 1414 | #endif |
1da177e4 LT |
1415 | #ifdef CONFIG_DNOTIFY |
1416 | { | |
1da177e4 LT |
1417 | .procname = "dir-notify-enable", |
1418 | .data = &dir_notify_enable, | |
1419 | .maxlen = sizeof(int), | |
1420 | .mode = 0644, | |
6d456111 | 1421 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1422 | }, |
1423 | #endif | |
1424 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1425 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1426 | { |
1da177e4 LT |
1427 | .procname = "lease-break-time", |
1428 | .data = &lease_break_time, | |
1429 | .maxlen = sizeof(int), | |
1430 | .mode = 0644, | |
6d456111 | 1431 | .proc_handler = proc_dointvec, |
1da177e4 | 1432 | }, |
bfcd17a6 | 1433 | #endif |
ebf3f09c | 1434 | #ifdef CONFIG_AIO |
1da177e4 | 1435 | { |
1da177e4 LT |
1436 | .procname = "aio-nr", |
1437 | .data = &aio_nr, | |
1438 | .maxlen = sizeof(aio_nr), | |
1439 | .mode = 0444, | |
6d456111 | 1440 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1441 | }, |
1442 | { | |
1da177e4 LT |
1443 | .procname = "aio-max-nr", |
1444 | .data = &aio_max_nr, | |
1445 | .maxlen = sizeof(aio_max_nr), | |
1446 | .mode = 0644, | |
6d456111 | 1447 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1448 | }, |
ebf3f09c | 1449 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1450 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1451 | { |
0399cb08 RL |
1452 | .procname = "inotify", |
1453 | .mode = 0555, | |
1454 | .child = inotify_table, | |
1455 | }, | |
1456 | #endif | |
7ef9964e DL |
1457 | #ifdef CONFIG_EPOLL |
1458 | { | |
1459 | .procname = "epoll", | |
1460 | .mode = 0555, | |
1461 | .child = epoll_table, | |
1462 | }, | |
1463 | #endif | |
1da177e4 | 1464 | #endif |
d6e71144 | 1465 | { |
d6e71144 AC |
1466 | .procname = "suid_dumpable", |
1467 | .data = &suid_dumpable, | |
1468 | .maxlen = sizeof(int), | |
1469 | .mode = 0644, | |
6d456111 | 1470 | .proc_handler = proc_dointvec_minmax, |
8e654fba MW |
1471 | .extra1 = &zero, |
1472 | .extra2 = &two, | |
d6e71144 | 1473 | }, |
2abc26fc EB |
1474 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1475 | { | |
2abc26fc EB |
1476 | .procname = "binfmt_misc", |
1477 | .mode = 0555, | |
1478 | .child = binfmt_misc_table, | |
1479 | }, | |
1480 | #endif | |
b492e95b | 1481 | { |
ff9da691 JA |
1482 | .procname = "pipe-max-size", |
1483 | .data = &pipe_max_size, | |
b492e95b JA |
1484 | .maxlen = sizeof(int), |
1485 | .mode = 0644, | |
ff9da691 JA |
1486 | .proc_handler = &pipe_proc_fn, |
1487 | .extra1 = &pipe_min_size, | |
b492e95b | 1488 | }, |
6fce56ec | 1489 | { } |
1da177e4 LT |
1490 | }; |
1491 | ||
d8217f07 | 1492 | static struct ctl_table debug_table[] = { |
ab3c68ee HC |
1493 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || \ |
1494 | defined(CONFIG_S390) | |
abd4f750 | 1495 | { |
abd4f750 MAS |
1496 | .procname = "exception-trace", |
1497 | .data = &show_unhandled_signals, | |
1498 | .maxlen = sizeof(int), | |
1499 | .mode = 0644, | |
1500 | .proc_handler = proc_dointvec | |
1501 | }, | |
b2be84df MH |
1502 | #endif |
1503 | #if defined(CONFIG_OPTPROBES) | |
1504 | { | |
1505 | .procname = "kprobes-optimization", | |
1506 | .data = &sysctl_kprobes_optimization, | |
1507 | .maxlen = sizeof(int), | |
1508 | .mode = 0644, | |
1509 | .proc_handler = proc_kprobes_optimization_handler, | |
1510 | .extra1 = &zero, | |
1511 | .extra2 = &one, | |
1512 | }, | |
abd4f750 | 1513 | #endif |
6fce56ec | 1514 | { } |
1da177e4 LT |
1515 | }; |
1516 | ||
d8217f07 | 1517 | static struct ctl_table dev_table[] = { |
6fce56ec | 1518 | { } |
0eeca283 | 1519 | }; |
1da177e4 | 1520 | |
330d57fb AV |
1521 | static DEFINE_SPINLOCK(sysctl_lock); |
1522 | ||
1523 | /* called under sysctl_lock */ | |
1524 | static int use_table(struct ctl_table_header *p) | |
1525 | { | |
1526 | if (unlikely(p->unregistering)) | |
1527 | return 0; | |
1528 | p->used++; | |
1529 | return 1; | |
1530 | } | |
1531 | ||
1532 | /* called under sysctl_lock */ | |
1533 | static void unuse_table(struct ctl_table_header *p) | |
1534 | { | |
1535 | if (!--p->used) | |
1536 | if (unlikely(p->unregistering)) | |
1537 | complete(p->unregistering); | |
1538 | } | |
1539 | ||
1540 | /* called under sysctl_lock, will reacquire if has to wait */ | |
1541 | static void start_unregistering(struct ctl_table_header *p) | |
1542 | { | |
1543 | /* | |
1544 | * if p->used is 0, nobody will ever touch that entry again; | |
1545 | * we'll eliminate all paths to it before dropping sysctl_lock | |
1546 | */ | |
1547 | if (unlikely(p->used)) { | |
1548 | struct completion wait; | |
1549 | init_completion(&wait); | |
1550 | p->unregistering = &wait; | |
1551 | spin_unlock(&sysctl_lock); | |
1552 | wait_for_completion(&wait); | |
1553 | spin_lock(&sysctl_lock); | |
f7e6ced4 AV |
1554 | } else { |
1555 | /* anything non-NULL; we'll never dereference it */ | |
1556 | p->unregistering = ERR_PTR(-EINVAL); | |
330d57fb AV |
1557 | } |
1558 | /* | |
1559 | * do not remove from the list until nobody holds it; walking the | |
1560 | * list in do_sysctl() relies on that. | |
1561 | */ | |
1562 | list_del_init(&p->ctl_entry); | |
1563 | } | |
1564 | ||
f7e6ced4 AV |
1565 | void sysctl_head_get(struct ctl_table_header *head) |
1566 | { | |
1567 | spin_lock(&sysctl_lock); | |
1568 | head->count++; | |
1569 | spin_unlock(&sysctl_lock); | |
1570 | } | |
1571 | ||
dfef6dcd AV |
1572 | static void free_head(struct rcu_head *rcu) |
1573 | { | |
1574 | kfree(container_of(rcu, struct ctl_table_header, rcu)); | |
1575 | } | |
1576 | ||
f7e6ced4 AV |
1577 | void sysctl_head_put(struct ctl_table_header *head) |
1578 | { | |
1579 | spin_lock(&sysctl_lock); | |
1580 | if (!--head->count) | |
dfef6dcd | 1581 | call_rcu(&head->rcu, free_head); |
f7e6ced4 AV |
1582 | spin_unlock(&sysctl_lock); |
1583 | } | |
1584 | ||
1585 | struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head) | |
1586 | { | |
1587 | if (!head) | |
1588 | BUG(); | |
1589 | spin_lock(&sysctl_lock); | |
1590 | if (!use_table(head)) | |
1591 | head = ERR_PTR(-ENOENT); | |
1592 | spin_unlock(&sysctl_lock); | |
1593 | return head; | |
1594 | } | |
1595 | ||
805b5d5e EB |
1596 | void sysctl_head_finish(struct ctl_table_header *head) |
1597 | { | |
1598 | if (!head) | |
1599 | return; | |
1600 | spin_lock(&sysctl_lock); | |
1601 | unuse_table(head); | |
1602 | spin_unlock(&sysctl_lock); | |
1603 | } | |
1604 | ||
73455092 AV |
1605 | static struct ctl_table_set * |
1606 | lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces) | |
1607 | { | |
1608 | struct ctl_table_set *set = &root->default_set; | |
1609 | if (root->lookup) | |
1610 | set = root->lookup(root, namespaces); | |
1611 | return set; | |
1612 | } | |
1613 | ||
e51b6ba0 EB |
1614 | static struct list_head * |
1615 | lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces) | |
805b5d5e | 1616 | { |
73455092 AV |
1617 | struct ctl_table_set *set = lookup_header_set(root, namespaces); |
1618 | return &set->list; | |
e51b6ba0 EB |
1619 | } |
1620 | ||
1621 | struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces, | |
1622 | struct ctl_table_header *prev) | |
1623 | { | |
1624 | struct ctl_table_root *root; | |
1625 | struct list_head *header_list; | |
805b5d5e EB |
1626 | struct ctl_table_header *head; |
1627 | struct list_head *tmp; | |
e51b6ba0 | 1628 | |
805b5d5e EB |
1629 | spin_lock(&sysctl_lock); |
1630 | if (prev) { | |
e51b6ba0 | 1631 | head = prev; |
805b5d5e EB |
1632 | tmp = &prev->ctl_entry; |
1633 | unuse_table(prev); | |
1634 | goto next; | |
1635 | } | |
1636 | tmp = &root_table_header.ctl_entry; | |
1637 | for (;;) { | |
1638 | head = list_entry(tmp, struct ctl_table_header, ctl_entry); | |
1639 | ||
1640 | if (!use_table(head)) | |
1641 | goto next; | |
1642 | spin_unlock(&sysctl_lock); | |
1643 | return head; | |
1644 | next: | |
e51b6ba0 | 1645 | root = head->root; |
805b5d5e | 1646 | tmp = tmp->next; |
e51b6ba0 EB |
1647 | header_list = lookup_header_list(root, namespaces); |
1648 | if (tmp != header_list) | |
1649 | continue; | |
1650 | ||
1651 | do { | |
1652 | root = list_entry(root->root_list.next, | |
1653 | struct ctl_table_root, root_list); | |
1654 | if (root == &sysctl_table_root) | |
1655 | goto out; | |
1656 | header_list = lookup_header_list(root, namespaces); | |
1657 | } while (list_empty(header_list)); | |
1658 | tmp = header_list->next; | |
805b5d5e | 1659 | } |
e51b6ba0 | 1660 | out: |
805b5d5e EB |
1661 | spin_unlock(&sysctl_lock); |
1662 | return NULL; | |
1663 | } | |
1664 | ||
e51b6ba0 EB |
1665 | struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev) |
1666 | { | |
1667 | return __sysctl_head_next(current->nsproxy, prev); | |
1668 | } | |
1669 | ||
1670 | void register_sysctl_root(struct ctl_table_root *root) | |
1671 | { | |
1672 | spin_lock(&sysctl_lock); | |
1673 | list_add_tail(&root->root_list, &sysctl_table_root.root_list); | |
1674 | spin_unlock(&sysctl_lock); | |
1675 | } | |
1676 | ||
1da177e4 | 1677 | /* |
1ff007eb | 1678 | * sysctl_perm does NOT grant the superuser all rights automatically, because |
1da177e4 LT |
1679 | * some sysctl variables are readonly even to root. |
1680 | */ | |
1681 | ||
1682 | static int test_perm(int mode, int op) | |
1683 | { | |
76aac0e9 | 1684 | if (!current_euid()) |
1da177e4 LT |
1685 | mode >>= 6; |
1686 | else if (in_egroup_p(0)) | |
1687 | mode >>= 3; | |
e6305c43 | 1688 | if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0) |
1da177e4 LT |
1689 | return 0; |
1690 | return -EACCES; | |
1691 | } | |
1692 | ||
d7321cd6 | 1693 | int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op) |
1da177e4 | 1694 | { |
d7321cd6 PE |
1695 | int mode; |
1696 | ||
d7321cd6 PE |
1697 | if (root->permissions) |
1698 | mode = root->permissions(root, current->nsproxy, table); | |
1699 | else | |
1700 | mode = table->mode; | |
1701 | ||
1702 | return test_perm(mode, op); | |
1da177e4 LT |
1703 | } |
1704 | ||
d912b0cc EB |
1705 | static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table) |
1706 | { | |
2315ffa0 | 1707 | for (; table->procname; table++) { |
d912b0cc EB |
1708 | table->parent = parent; |
1709 | if (table->child) | |
1710 | sysctl_set_parent(table, table->child); | |
1711 | } | |
1712 | } | |
1713 | ||
1714 | static __init int sysctl_init(void) | |
1715 | { | |
1716 | sysctl_set_parent(NULL, root_table); | |
88f458e4 | 1717 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
b3bd3de6 | 1718 | sysctl_check_table(current->nsproxy, root_table); |
88f458e4 | 1719 | #endif |
d912b0cc EB |
1720 | return 0; |
1721 | } | |
1722 | ||
1723 | core_initcall(sysctl_init); | |
1724 | ||
bfbcf034 AV |
1725 | static struct ctl_table *is_branch_in(struct ctl_table *branch, |
1726 | struct ctl_table *table) | |
ae7edecc AV |
1727 | { |
1728 | struct ctl_table *p; | |
1729 | const char *s = branch->procname; | |
1730 | ||
1731 | /* branch should have named subdirectory as its first element */ | |
1732 | if (!s || !branch->child) | |
bfbcf034 | 1733 | return NULL; |
ae7edecc AV |
1734 | |
1735 | /* ... and nothing else */ | |
2315ffa0 | 1736 | if (branch[1].procname) |
bfbcf034 | 1737 | return NULL; |
ae7edecc AV |
1738 | |
1739 | /* table should contain subdirectory with the same name */ | |
2315ffa0 | 1740 | for (p = table; p->procname; p++) { |
ae7edecc AV |
1741 | if (!p->child) |
1742 | continue; | |
1743 | if (p->procname && strcmp(p->procname, s) == 0) | |
bfbcf034 | 1744 | return p; |
ae7edecc | 1745 | } |
bfbcf034 | 1746 | return NULL; |
ae7edecc AV |
1747 | } |
1748 | ||
1749 | /* see if attaching q to p would be an improvement */ | |
1750 | static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q) | |
1751 | { | |
1752 | struct ctl_table *to = p->ctl_table, *by = q->ctl_table; | |
bfbcf034 | 1753 | struct ctl_table *next; |
ae7edecc AV |
1754 | int is_better = 0; |
1755 | int not_in_parent = !p->attached_by; | |
1756 | ||
bfbcf034 | 1757 | while ((next = is_branch_in(by, to)) != NULL) { |
ae7edecc AV |
1758 | if (by == q->attached_by) |
1759 | is_better = 1; | |
1760 | if (to == p->attached_by) | |
1761 | not_in_parent = 1; | |
1762 | by = by->child; | |
bfbcf034 | 1763 | to = next->child; |
ae7edecc AV |
1764 | } |
1765 | ||
1766 | if (is_better && not_in_parent) { | |
1767 | q->attached_by = by; | |
1768 | q->attached_to = to; | |
1769 | q->parent = p; | |
1770 | } | |
1771 | } | |
1772 | ||
1da177e4 | 1773 | /** |
e51b6ba0 EB |
1774 | * __register_sysctl_paths - register a sysctl hierarchy |
1775 | * @root: List of sysctl headers to register on | |
1776 | * @namespaces: Data to compute which lists of sysctl entries are visible | |
29e796fd | 1777 | * @path: The path to the directory the sysctl table is in. |
1da177e4 | 1778 | * @table: the top-level table structure |
1da177e4 LT |
1779 | * |
1780 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
29e796fd | 1781 | * array. A completely 0 filled entry terminates the table. |
1da177e4 | 1782 | * |
d8217f07 | 1783 | * The members of the &struct ctl_table structure are used as follows: |
1da177e4 | 1784 | * |
1da177e4 LT |
1785 | * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not |
1786 | * enter a sysctl file | |
1787 | * | |
1788 | * data - a pointer to data for use by proc_handler | |
1789 | * | |
1790 | * maxlen - the maximum size in bytes of the data | |
1791 | * | |
1792 | * mode - the file permissions for the /proc/sys file, and for sysctl(2) | |
1793 | * | |
1794 | * child - a pointer to the child sysctl table if this entry is a directory, or | |
1795 | * %NULL. | |
1796 | * | |
1797 | * proc_handler - the text handler routine (described below) | |
1798 | * | |
1da177e4 LT |
1799 | * de - for internal use by the sysctl routines |
1800 | * | |
1801 | * extra1, extra2 - extra pointers usable by the proc handler routines | |
1802 | * | |
1803 | * Leaf nodes in the sysctl tree will be represented by a single file | |
1804 | * under /proc; non-leaf nodes will be represented by directories. | |
1805 | * | |
1806 | * sysctl(2) can automatically manage read and write requests through | |
1807 | * the sysctl table. The data and maxlen fields of the ctl_table | |
1808 | * struct enable minimal validation of the values being written to be | |
1809 | * performed, and the mode field allows minimal authentication. | |
1810 | * | |
1da177e4 LT |
1811 | * There must be a proc_handler routine for any terminal nodes |
1812 | * mirrored under /proc/sys (non-terminals are handled by a built-in | |
1813 | * directory handler). Several default handlers are available to | |
1814 | * cover common cases - | |
1815 | * | |
1816 | * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(), | |
1817 | * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(), | |
1818 | * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax() | |
1819 | * | |
1820 | * It is the handler's job to read the input buffer from user memory | |
1821 | * and process it. The handler should return 0 on success. | |
1822 | * | |
1823 | * This routine returns %NULL on a failure to register, and a pointer | |
1824 | * to the table header on success. | |
1825 | */ | |
e51b6ba0 EB |
1826 | struct ctl_table_header *__register_sysctl_paths( |
1827 | struct ctl_table_root *root, | |
1828 | struct nsproxy *namespaces, | |
1829 | const struct ctl_path *path, struct ctl_table *table) | |
1da177e4 | 1830 | { |
29e796fd EB |
1831 | struct ctl_table_header *header; |
1832 | struct ctl_table *new, **prevp; | |
1833 | unsigned int n, npath; | |
ae7edecc | 1834 | struct ctl_table_set *set; |
29e796fd EB |
1835 | |
1836 | /* Count the path components */ | |
2315ffa0 | 1837 | for (npath = 0; path[npath].procname; ++npath) |
29e796fd EB |
1838 | ; |
1839 | ||
1840 | /* | |
1841 | * For each path component, allocate a 2-element ctl_table array. | |
1842 | * The first array element will be filled with the sysctl entry | |
2315ffa0 | 1843 | * for this, the second will be the sentinel (procname == 0). |
29e796fd EB |
1844 | * |
1845 | * We allocate everything in one go so that we don't have to | |
1846 | * worry about freeing additional memory in unregister_sysctl_table. | |
1847 | */ | |
1848 | header = kzalloc(sizeof(struct ctl_table_header) + | |
1849 | (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL); | |
1850 | if (!header) | |
1da177e4 | 1851 | return NULL; |
29e796fd EB |
1852 | |
1853 | new = (struct ctl_table *) (header + 1); | |
1854 | ||
1855 | /* Now connect the dots */ | |
1856 | prevp = &header->ctl_table; | |
1857 | for (n = 0; n < npath; ++n, ++path) { | |
1858 | /* Copy the procname */ | |
1859 | new->procname = path->procname; | |
29e796fd EB |
1860 | new->mode = 0555; |
1861 | ||
1862 | *prevp = new; | |
1863 | prevp = &new->child; | |
1864 | ||
1865 | new += 2; | |
1866 | } | |
1867 | *prevp = table; | |
23eb06de | 1868 | header->ctl_table_arg = table; |
29e796fd EB |
1869 | |
1870 | INIT_LIST_HEAD(&header->ctl_entry); | |
1871 | header->used = 0; | |
1872 | header->unregistering = NULL; | |
e51b6ba0 | 1873 | header->root = root; |
29e796fd | 1874 | sysctl_set_parent(NULL, header->ctl_table); |
f7e6ced4 | 1875 | header->count = 1; |
88f458e4 | 1876 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
e51b6ba0 | 1877 | if (sysctl_check_table(namespaces, header->ctl_table)) { |
29e796fd | 1878 | kfree(header); |
fc6cd25b EB |
1879 | return NULL; |
1880 | } | |
88f458e4 | 1881 | #endif |
330d57fb | 1882 | spin_lock(&sysctl_lock); |
73455092 | 1883 | header->set = lookup_header_set(root, namespaces); |
ae7edecc AV |
1884 | header->attached_by = header->ctl_table; |
1885 | header->attached_to = root_table; | |
1886 | header->parent = &root_table_header; | |
1887 | for (set = header->set; set; set = set->parent) { | |
1888 | struct ctl_table_header *p; | |
1889 | list_for_each_entry(p, &set->list, ctl_entry) { | |
1890 | if (p->unregistering) | |
1891 | continue; | |
1892 | try_attach(p, header); | |
1893 | } | |
1894 | } | |
1895 | header->parent->count++; | |
73455092 | 1896 | list_add_tail(&header->ctl_entry, &header->set->list); |
330d57fb | 1897 | spin_unlock(&sysctl_lock); |
29e796fd EB |
1898 | |
1899 | return header; | |
1900 | } | |
1901 | ||
e51b6ba0 EB |
1902 | /** |
1903 | * register_sysctl_table_path - register a sysctl table hierarchy | |
1904 | * @path: The path to the directory the sysctl table is in. | |
1905 | * @table: the top-level table structure | |
1906 | * | |
1907 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
1908 | * array. A completely 0 filled entry terminates the table. | |
1909 | * | |
1910 | * See __register_sysctl_paths for more details. | |
1911 | */ | |
1912 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, | |
1913 | struct ctl_table *table) | |
1914 | { | |
1915 | return __register_sysctl_paths(&sysctl_table_root, current->nsproxy, | |
1916 | path, table); | |
1917 | } | |
1918 | ||
29e796fd EB |
1919 | /** |
1920 | * register_sysctl_table - register a sysctl table hierarchy | |
1921 | * @table: the top-level table structure | |
1922 | * | |
1923 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
1924 | * array. A completely 0 filled entry terminates the table. | |
1925 | * | |
1926 | * See register_sysctl_paths for more details. | |
1927 | */ | |
1928 | struct ctl_table_header *register_sysctl_table(struct ctl_table *table) | |
1929 | { | |
1930 | static const struct ctl_path null_path[] = { {} }; | |
1931 | ||
1932 | return register_sysctl_paths(null_path, table); | |
1da177e4 LT |
1933 | } |
1934 | ||
1935 | /** | |
1936 | * unregister_sysctl_table - unregister a sysctl table hierarchy | |
1937 | * @header: the header returned from register_sysctl_table | |
1938 | * | |
1939 | * Unregisters the sysctl table and all children. proc entries may not | |
1940 | * actually be removed until they are no longer used by anyone. | |
1941 | */ | |
1942 | void unregister_sysctl_table(struct ctl_table_header * header) | |
1943 | { | |
330d57fb | 1944 | might_sleep(); |
f1dad166 PE |
1945 | |
1946 | if (header == NULL) | |
1947 | return; | |
1948 | ||
330d57fb AV |
1949 | spin_lock(&sysctl_lock); |
1950 | start_unregistering(header); | |
ae7edecc AV |
1951 | if (!--header->parent->count) { |
1952 | WARN_ON(1); | |
dfef6dcd | 1953 | call_rcu(&header->parent->rcu, free_head); |
ae7edecc | 1954 | } |
f7e6ced4 | 1955 | if (!--header->count) |
dfef6dcd | 1956 | call_rcu(&header->rcu, free_head); |
330d57fb | 1957 | spin_unlock(&sysctl_lock); |
1da177e4 LT |
1958 | } |
1959 | ||
9043476f AV |
1960 | int sysctl_is_seen(struct ctl_table_header *p) |
1961 | { | |
1962 | struct ctl_table_set *set = p->set; | |
1963 | int res; | |
1964 | spin_lock(&sysctl_lock); | |
1965 | if (p->unregistering) | |
1966 | res = 0; | |
1967 | else if (!set->is_seen) | |
1968 | res = 1; | |
1969 | else | |
1970 | res = set->is_seen(set); | |
1971 | spin_unlock(&sysctl_lock); | |
1972 | return res; | |
1973 | } | |
1974 | ||
73455092 AV |
1975 | void setup_sysctl_set(struct ctl_table_set *p, |
1976 | struct ctl_table_set *parent, | |
1977 | int (*is_seen)(struct ctl_table_set *)) | |
1978 | { | |
1979 | INIT_LIST_HEAD(&p->list); | |
1980 | p->parent = parent ? parent : &sysctl_table_root.default_set; | |
1981 | p->is_seen = is_seen; | |
1982 | } | |
1983 | ||
b89a8171 | 1984 | #else /* !CONFIG_SYSCTL */ |
d8217f07 | 1985 | struct ctl_table_header *register_sysctl_table(struct ctl_table * table) |
b89a8171 EB |
1986 | { |
1987 | return NULL; | |
1988 | } | |
1989 | ||
29e796fd EB |
1990 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, |
1991 | struct ctl_table *table) | |
1992 | { | |
1993 | return NULL; | |
1994 | } | |
1995 | ||
b89a8171 EB |
1996 | void unregister_sysctl_table(struct ctl_table_header * table) |
1997 | { | |
1998 | } | |
1999 | ||
73455092 AV |
2000 | void setup_sysctl_set(struct ctl_table_set *p, |
2001 | struct ctl_table_set *parent, | |
2002 | int (*is_seen)(struct ctl_table_set *)) | |
2003 | { | |
2004 | } | |
2005 | ||
f7e6ced4 AV |
2006 | void sysctl_head_put(struct ctl_table_header *head) |
2007 | { | |
2008 | } | |
2009 | ||
b89a8171 EB |
2010 | #endif /* CONFIG_SYSCTL */ |
2011 | ||
1da177e4 LT |
2012 | /* |
2013 | * /proc/sys support | |
2014 | */ | |
2015 | ||
b89a8171 | 2016 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 2017 | |
b1ba4ddd | 2018 | static int _proc_do_string(void* data, int maxlen, int write, |
8d65af78 | 2019 | void __user *buffer, |
b1ba4ddd | 2020 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2021 | { |
2022 | size_t len; | |
2023 | char __user *p; | |
2024 | char c; | |
8d060877 ON |
2025 | |
2026 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
2027 | *lenp = 0; |
2028 | return 0; | |
2029 | } | |
8d060877 | 2030 | |
1da177e4 LT |
2031 | if (write) { |
2032 | len = 0; | |
2033 | p = buffer; | |
2034 | while (len < *lenp) { | |
2035 | if (get_user(c, p++)) | |
2036 | return -EFAULT; | |
2037 | if (c == 0 || c == '\n') | |
2038 | break; | |
2039 | len++; | |
2040 | } | |
f5dd3d6f SV |
2041 | if (len >= maxlen) |
2042 | len = maxlen-1; | |
2043 | if(copy_from_user(data, buffer, len)) | |
1da177e4 | 2044 | return -EFAULT; |
f5dd3d6f | 2045 | ((char *) data)[len] = 0; |
1da177e4 LT |
2046 | *ppos += *lenp; |
2047 | } else { | |
f5dd3d6f SV |
2048 | len = strlen(data); |
2049 | if (len > maxlen) | |
2050 | len = maxlen; | |
8d060877 ON |
2051 | |
2052 | if (*ppos > len) { | |
2053 | *lenp = 0; | |
2054 | return 0; | |
2055 | } | |
2056 | ||
2057 | data += *ppos; | |
2058 | len -= *ppos; | |
2059 | ||
1da177e4 LT |
2060 | if (len > *lenp) |
2061 | len = *lenp; | |
2062 | if (len) | |
f5dd3d6f | 2063 | if(copy_to_user(buffer, data, len)) |
1da177e4 LT |
2064 | return -EFAULT; |
2065 | if (len < *lenp) { | |
2066 | if(put_user('\n', ((char __user *) buffer) + len)) | |
2067 | return -EFAULT; | |
2068 | len++; | |
2069 | } | |
2070 | *lenp = len; | |
2071 | *ppos += len; | |
2072 | } | |
2073 | return 0; | |
2074 | } | |
2075 | ||
f5dd3d6f SV |
2076 | /** |
2077 | * proc_dostring - read a string sysctl | |
2078 | * @table: the sysctl table | |
2079 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
2080 | * @buffer: the user buffer |
2081 | * @lenp: the size of the user buffer | |
2082 | * @ppos: file position | |
2083 | * | |
2084 | * Reads/writes a string from/to the user buffer. If the kernel | |
2085 | * buffer provided is not large enough to hold the string, the | |
2086 | * string is truncated. The copied string is %NULL-terminated. | |
2087 | * If the string is being read by the user process, it is copied | |
2088 | * and a newline '\n' is added. It is truncated if the buffer is | |
2089 | * not large enough. | |
2090 | * | |
2091 | * Returns 0 on success. | |
2092 | */ | |
8d65af78 | 2093 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2094 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2095 | { | |
8d65af78 | 2096 | return _proc_do_string(table->data, table->maxlen, write, |
f5dd3d6f SV |
2097 | buffer, lenp, ppos); |
2098 | } | |
2099 | ||
00b7c339 AW |
2100 | static size_t proc_skip_spaces(char **buf) |
2101 | { | |
2102 | size_t ret; | |
2103 | char *tmp = skip_spaces(*buf); | |
2104 | ret = tmp - *buf; | |
2105 | *buf = tmp; | |
2106 | return ret; | |
2107 | } | |
2108 | ||
9f977fb7 OP |
2109 | static void proc_skip_char(char **buf, size_t *size, const char v) |
2110 | { | |
2111 | while (*size) { | |
2112 | if (**buf != v) | |
2113 | break; | |
2114 | (*size)--; | |
2115 | (*buf)++; | |
2116 | } | |
2117 | } | |
2118 | ||
00b7c339 AW |
2119 | #define TMPBUFLEN 22 |
2120 | /** | |
0fc377bd | 2121 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 2122 | * |
0fc377bd RD |
2123 | * @buf: a kernel buffer |
2124 | * @size: size of the kernel buffer | |
2125 | * @val: this is where the number will be stored | |
2126 | * @neg: set to %TRUE if number is negative | |
2127 | * @perm_tr: a vector which contains the allowed trailers | |
2128 | * @perm_tr_len: size of the perm_tr vector | |
2129 | * @tr: pointer to store the trailer character | |
00b7c339 | 2130 | * |
0fc377bd RD |
2131 | * In case of success %0 is returned and @buf and @size are updated with |
2132 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
2133 | * character exists (size is non-zero after returning from this | |
2134 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
2135 | */ |
2136 | static int proc_get_long(char **buf, size_t *size, | |
2137 | unsigned long *val, bool *neg, | |
2138 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
2139 | { | |
2140 | int len; | |
2141 | char *p, tmp[TMPBUFLEN]; | |
2142 | ||
2143 | if (!*size) | |
2144 | return -EINVAL; | |
2145 | ||
2146 | len = *size; | |
2147 | if (len > TMPBUFLEN - 1) | |
2148 | len = TMPBUFLEN - 1; | |
2149 | ||
2150 | memcpy(tmp, *buf, len); | |
2151 | ||
2152 | tmp[len] = 0; | |
2153 | p = tmp; | |
2154 | if (*p == '-' && *size > 1) { | |
2155 | *neg = true; | |
2156 | p++; | |
2157 | } else | |
2158 | *neg = false; | |
2159 | if (!isdigit(*p)) | |
2160 | return -EINVAL; | |
2161 | ||
2162 | *val = simple_strtoul(p, &p, 0); | |
2163 | ||
2164 | len = p - tmp; | |
2165 | ||
2166 | /* We don't know if the next char is whitespace thus we may accept | |
2167 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
2168 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
2169 | if (len == TMPBUFLEN - 1) | |
2170 | return -EINVAL; | |
2171 | ||
2172 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
2173 | return -EINVAL; | |
1da177e4 | 2174 | |
00b7c339 AW |
2175 | if (tr && (len < *size)) |
2176 | *tr = *p; | |
2177 | ||
2178 | *buf += len; | |
2179 | *size -= len; | |
2180 | ||
2181 | return 0; | |
2182 | } | |
2183 | ||
2184 | /** | |
0fc377bd | 2185 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 2186 | * |
0fc377bd RD |
2187 | * @buf: the user buffer |
2188 | * @size: the size of the user buffer | |
2189 | * @val: the integer to be converted | |
2190 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 2191 | * |
0fc377bd RD |
2192 | * In case of success %0 is returned and @buf and @size are updated with |
2193 | * the amount of bytes written. | |
00b7c339 AW |
2194 | */ |
2195 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
2196 | bool neg) | |
2197 | { | |
2198 | int len; | |
2199 | char tmp[TMPBUFLEN], *p = tmp; | |
2200 | ||
2201 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
2202 | len = strlen(tmp); | |
2203 | if (len > *size) | |
2204 | len = *size; | |
2205 | if (copy_to_user(*buf, tmp, len)) | |
2206 | return -EFAULT; | |
2207 | *size -= len; | |
2208 | *buf += len; | |
2209 | return 0; | |
2210 | } | |
2211 | #undef TMPBUFLEN | |
2212 | ||
2213 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
2214 | { | |
2215 | if (*size) { | |
2216 | char __user **buffer = (char __user **)buf; | |
2217 | if (put_user(c, *buffer)) | |
2218 | return -EFAULT; | |
2219 | (*size)--, (*buffer)++; | |
2220 | *buf = *buffer; | |
2221 | } | |
2222 | return 0; | |
2223 | } | |
1da177e4 | 2224 | |
00b7c339 | 2225 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2226 | int *valp, |
2227 | int write, void *data) | |
2228 | { | |
2229 | if (write) { | |
2230 | *valp = *negp ? -*lvalp : *lvalp; | |
2231 | } else { | |
2232 | int val = *valp; | |
2233 | if (val < 0) { | |
00b7c339 | 2234 | *negp = true; |
1da177e4 LT |
2235 | *lvalp = (unsigned long)-val; |
2236 | } else { | |
00b7c339 | 2237 | *negp = false; |
1da177e4 LT |
2238 | *lvalp = (unsigned long)val; |
2239 | } | |
2240 | } | |
2241 | return 0; | |
2242 | } | |
2243 | ||
00b7c339 AW |
2244 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
2245 | ||
d8217f07 | 2246 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2247 | int write, void __user *buffer, |
fcfbd547 | 2248 | size_t *lenp, loff_t *ppos, |
00b7c339 | 2249 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
2250 | int write, void *data), |
2251 | void *data) | |
2252 | { | |
00b7c339 AW |
2253 | int *i, vleft, first = 1, err = 0; |
2254 | unsigned long page = 0; | |
2255 | size_t left; | |
2256 | char *kbuf; | |
1da177e4 | 2257 | |
00b7c339 | 2258 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2259 | *lenp = 0; |
2260 | return 0; | |
2261 | } | |
2262 | ||
fcfbd547 | 2263 | i = (int *) tbl_data; |
1da177e4 LT |
2264 | vleft = table->maxlen / sizeof(*i); |
2265 | left = *lenp; | |
2266 | ||
2267 | if (!conv) | |
2268 | conv = do_proc_dointvec_conv; | |
2269 | ||
00b7c339 AW |
2270 | if (write) { |
2271 | if (left > PAGE_SIZE - 1) | |
2272 | left = PAGE_SIZE - 1; | |
2273 | page = __get_free_page(GFP_TEMPORARY); | |
2274 | kbuf = (char *) page; | |
2275 | if (!kbuf) | |
2276 | return -ENOMEM; | |
2277 | if (copy_from_user(kbuf, buffer, left)) { | |
2278 | err = -EFAULT; | |
2279 | goto free; | |
2280 | } | |
2281 | kbuf[left] = 0; | |
2282 | } | |
2283 | ||
1da177e4 | 2284 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2285 | unsigned long lval; |
2286 | bool neg; | |
1da177e4 | 2287 | |
00b7c339 AW |
2288 | if (write) { |
2289 | left -= proc_skip_spaces(&kbuf); | |
1da177e4 | 2290 | |
563b0467 O |
2291 | if (!left) |
2292 | break; | |
00b7c339 AW |
2293 | err = proc_get_long(&kbuf, &left, &lval, &neg, |
2294 | proc_wspace_sep, | |
2295 | sizeof(proc_wspace_sep), NULL); | |
2296 | if (err) | |
1da177e4 | 2297 | break; |
00b7c339 AW |
2298 | if (conv(&neg, &lval, i, 1, data)) { |
2299 | err = -EINVAL; | |
1da177e4 | 2300 | break; |
00b7c339 | 2301 | } |
1da177e4 | 2302 | } else { |
00b7c339 AW |
2303 | if (conv(&neg, &lval, i, 0, data)) { |
2304 | err = -EINVAL; | |
2305 | break; | |
2306 | } | |
1da177e4 | 2307 | if (!first) |
00b7c339 AW |
2308 | err = proc_put_char(&buffer, &left, '\t'); |
2309 | if (err) | |
2310 | break; | |
2311 | err = proc_put_long(&buffer, &left, lval, neg); | |
2312 | if (err) | |
1da177e4 | 2313 | break; |
1da177e4 LT |
2314 | } |
2315 | } | |
2316 | ||
00b7c339 AW |
2317 | if (!write && !first && left && !err) |
2318 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2319 | if (write && !err && left) |
00b7c339 AW |
2320 | left -= proc_skip_spaces(&kbuf); |
2321 | free: | |
1da177e4 | 2322 | if (write) { |
00b7c339 AW |
2323 | free_page(page); |
2324 | if (first) | |
2325 | return err ? : -EINVAL; | |
1da177e4 | 2326 | } |
1da177e4 LT |
2327 | *lenp -= left; |
2328 | *ppos += *lenp; | |
00b7c339 | 2329 | return err; |
1da177e4 LT |
2330 | } |
2331 | ||
8d65af78 | 2332 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2333 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2334 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2335 | int write, void *data), |
2336 | void *data) | |
2337 | { | |
8d65af78 | 2338 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2339 | buffer, lenp, ppos, conv, data); |
2340 | } | |
2341 | ||
1da177e4 LT |
2342 | /** |
2343 | * proc_dointvec - read a vector of integers | |
2344 | * @table: the sysctl table | |
2345 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2346 | * @buffer: the user buffer |
2347 | * @lenp: the size of the user buffer | |
2348 | * @ppos: file position | |
2349 | * | |
2350 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2351 | * values from/to the user buffer, treated as an ASCII string. | |
2352 | * | |
2353 | * Returns 0 on success. | |
2354 | */ | |
8d65af78 | 2355 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2356 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2357 | { | |
8d65af78 | 2358 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2359 | NULL,NULL); |
2360 | } | |
2361 | ||
34f5a398 | 2362 | /* |
25ddbb18 AK |
2363 | * Taint values can only be increased |
2364 | * This means we can safely use a temporary. | |
34f5a398 | 2365 | */ |
8d65af78 | 2366 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2367 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2368 | { | |
25ddbb18 AK |
2369 | struct ctl_table t; |
2370 | unsigned long tmptaint = get_taint(); | |
2371 | int err; | |
34f5a398 | 2372 | |
91fcd412 | 2373 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2374 | return -EPERM; |
2375 | ||
25ddbb18 AK |
2376 | t = *table; |
2377 | t.data = &tmptaint; | |
8d65af78 | 2378 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2379 | if (err < 0) |
2380 | return err; | |
2381 | ||
2382 | if (write) { | |
2383 | /* | |
2384 | * Poor man's atomic or. Not worth adding a primitive | |
2385 | * to everyone's atomic.h for this | |
2386 | */ | |
2387 | int i; | |
2388 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2389 | if ((tmptaint >> i) & 1) | |
2390 | add_taint(i); | |
2391 | } | |
2392 | } | |
2393 | ||
2394 | return err; | |
34f5a398 TT |
2395 | } |
2396 | ||
1da177e4 LT |
2397 | struct do_proc_dointvec_minmax_conv_param { |
2398 | int *min; | |
2399 | int *max; | |
2400 | }; | |
2401 | ||
00b7c339 AW |
2402 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2403 | int *valp, | |
1da177e4 LT |
2404 | int write, void *data) |
2405 | { | |
2406 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2407 | if (write) { | |
2408 | int val = *negp ? -*lvalp : *lvalp; | |
2409 | if ((param->min && *param->min > val) || | |
2410 | (param->max && *param->max < val)) | |
2411 | return -EINVAL; | |
2412 | *valp = val; | |
2413 | } else { | |
2414 | int val = *valp; | |
2415 | if (val < 0) { | |
00b7c339 | 2416 | *negp = true; |
1da177e4 LT |
2417 | *lvalp = (unsigned long)-val; |
2418 | } else { | |
00b7c339 | 2419 | *negp = false; |
1da177e4 LT |
2420 | *lvalp = (unsigned long)val; |
2421 | } | |
2422 | } | |
2423 | return 0; | |
2424 | } | |
2425 | ||
2426 | /** | |
2427 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2428 | * @table: the sysctl table | |
2429 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2430 | * @buffer: the user buffer |
2431 | * @lenp: the size of the user buffer | |
2432 | * @ppos: file position | |
2433 | * | |
2434 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2435 | * values from/to the user buffer, treated as an ASCII string. | |
2436 | * | |
2437 | * This routine will ensure the values are within the range specified by | |
2438 | * table->extra1 (min) and table->extra2 (max). | |
2439 | * | |
2440 | * Returns 0 on success. | |
2441 | */ | |
8d65af78 | 2442 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2443 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2444 | { | |
2445 | struct do_proc_dointvec_minmax_conv_param param = { | |
2446 | .min = (int *) table->extra1, | |
2447 | .max = (int *) table->extra2, | |
2448 | }; | |
8d65af78 | 2449 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2450 | do_proc_dointvec_minmax_conv, ¶m); |
2451 | } | |
2452 | ||
d8217f07 | 2453 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2454 | void __user *buffer, |
2455 | size_t *lenp, loff_t *ppos, | |
2456 | unsigned long convmul, | |
2457 | unsigned long convdiv) | |
2458 | { | |
00b7c339 AW |
2459 | unsigned long *i, *min, *max; |
2460 | int vleft, first = 1, err = 0; | |
2461 | unsigned long page = 0; | |
2462 | size_t left; | |
2463 | char *kbuf; | |
2464 | ||
2465 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2466 | *lenp = 0; |
2467 | return 0; | |
2468 | } | |
00b7c339 | 2469 | |
fcfbd547 | 2470 | i = (unsigned long *) data; |
1da177e4 LT |
2471 | min = (unsigned long *) table->extra1; |
2472 | max = (unsigned long *) table->extra2; | |
2473 | vleft = table->maxlen / sizeof(unsigned long); | |
2474 | left = *lenp; | |
00b7c339 AW |
2475 | |
2476 | if (write) { | |
2477 | if (left > PAGE_SIZE - 1) | |
2478 | left = PAGE_SIZE - 1; | |
2479 | page = __get_free_page(GFP_TEMPORARY); | |
2480 | kbuf = (char *) page; | |
2481 | if (!kbuf) | |
2482 | return -ENOMEM; | |
2483 | if (copy_from_user(kbuf, buffer, left)) { | |
2484 | err = -EFAULT; | |
2485 | goto free; | |
2486 | } | |
2487 | kbuf[left] = 0; | |
2488 | } | |
2489 | ||
27b3d80a | 2490 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2491 | unsigned long val; |
2492 | ||
1da177e4 | 2493 | if (write) { |
00b7c339 AW |
2494 | bool neg; |
2495 | ||
2496 | left -= proc_skip_spaces(&kbuf); | |
2497 | ||
2498 | err = proc_get_long(&kbuf, &left, &val, &neg, | |
2499 | proc_wspace_sep, | |
2500 | sizeof(proc_wspace_sep), NULL); | |
2501 | if (err) | |
1da177e4 LT |
2502 | break; |
2503 | if (neg) | |
1da177e4 LT |
2504 | continue; |
2505 | if ((min && val < *min) || (max && val > *max)) | |
2506 | continue; | |
2507 | *i = val; | |
2508 | } else { | |
00b7c339 | 2509 | val = convdiv * (*i) / convmul; |
1da177e4 | 2510 | if (!first) |
00b7c339 AW |
2511 | err = proc_put_char(&buffer, &left, '\t'); |
2512 | err = proc_put_long(&buffer, &left, val, false); | |
2513 | if (err) | |
2514 | break; | |
1da177e4 LT |
2515 | } |
2516 | } | |
2517 | ||
00b7c339 AW |
2518 | if (!write && !first && left && !err) |
2519 | err = proc_put_char(&buffer, &left, '\n'); | |
2520 | if (write && !err) | |
2521 | left -= proc_skip_spaces(&kbuf); | |
2522 | free: | |
1da177e4 | 2523 | if (write) { |
00b7c339 AW |
2524 | free_page(page); |
2525 | if (first) | |
2526 | return err ? : -EINVAL; | |
1da177e4 | 2527 | } |
1da177e4 LT |
2528 | *lenp -= left; |
2529 | *ppos += *lenp; | |
00b7c339 | 2530 | return err; |
1da177e4 LT |
2531 | } |
2532 | ||
d8217f07 | 2533 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2534 | void __user *buffer, |
2535 | size_t *lenp, loff_t *ppos, | |
2536 | unsigned long convmul, | |
2537 | unsigned long convdiv) | |
2538 | { | |
2539 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2540 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2541 | } |
2542 | ||
1da177e4 LT |
2543 | /** |
2544 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2545 | * @table: the sysctl table | |
2546 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2547 | * @buffer: the user buffer |
2548 | * @lenp: the size of the user buffer | |
2549 | * @ppos: file position | |
2550 | * | |
2551 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2552 | * values from/to the user buffer, treated as an ASCII string. | |
2553 | * | |
2554 | * This routine will ensure the values are within the range specified by | |
2555 | * table->extra1 (min) and table->extra2 (max). | |
2556 | * | |
2557 | * Returns 0 on success. | |
2558 | */ | |
8d65af78 | 2559 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2560 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2561 | { | |
8d65af78 | 2562 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2563 | } |
2564 | ||
2565 | /** | |
2566 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2567 | * @table: the sysctl table | |
2568 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2569 | * @buffer: the user buffer |
2570 | * @lenp: the size of the user buffer | |
2571 | * @ppos: file position | |
2572 | * | |
2573 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2574 | * values from/to the user buffer, treated as an ASCII string. The values | |
2575 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2576 | * | |
2577 | * This routine will ensure the values are within the range specified by | |
2578 | * table->extra1 (min) and table->extra2 (max). | |
2579 | * | |
2580 | * Returns 0 on success. | |
2581 | */ | |
d8217f07 | 2582 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2583 | void __user *buffer, |
2584 | size_t *lenp, loff_t *ppos) | |
2585 | { | |
8d65af78 | 2586 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2587 | lenp, ppos, HZ, 1000l); |
2588 | } | |
2589 | ||
2590 | ||
00b7c339 | 2591 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2592 | int *valp, |
2593 | int write, void *data) | |
2594 | { | |
2595 | if (write) { | |
cba9f33d BS |
2596 | if (*lvalp > LONG_MAX / HZ) |
2597 | return 1; | |
1da177e4 LT |
2598 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2599 | } else { | |
2600 | int val = *valp; | |
2601 | unsigned long lval; | |
2602 | if (val < 0) { | |
00b7c339 | 2603 | *negp = true; |
1da177e4 LT |
2604 | lval = (unsigned long)-val; |
2605 | } else { | |
00b7c339 | 2606 | *negp = false; |
1da177e4 LT |
2607 | lval = (unsigned long)val; |
2608 | } | |
2609 | *lvalp = lval / HZ; | |
2610 | } | |
2611 | return 0; | |
2612 | } | |
2613 | ||
00b7c339 | 2614 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2615 | int *valp, |
2616 | int write, void *data) | |
2617 | { | |
2618 | if (write) { | |
cba9f33d BS |
2619 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2620 | return 1; | |
1da177e4 LT |
2621 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2622 | } else { | |
2623 | int val = *valp; | |
2624 | unsigned long lval; | |
2625 | if (val < 0) { | |
00b7c339 | 2626 | *negp = true; |
1da177e4 LT |
2627 | lval = (unsigned long)-val; |
2628 | } else { | |
00b7c339 | 2629 | *negp = false; |
1da177e4 LT |
2630 | lval = (unsigned long)val; |
2631 | } | |
2632 | *lvalp = jiffies_to_clock_t(lval); | |
2633 | } | |
2634 | return 0; | |
2635 | } | |
2636 | ||
00b7c339 | 2637 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2638 | int *valp, |
2639 | int write, void *data) | |
2640 | { | |
2641 | if (write) { | |
2642 | *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); | |
2643 | } else { | |
2644 | int val = *valp; | |
2645 | unsigned long lval; | |
2646 | if (val < 0) { | |
00b7c339 | 2647 | *negp = true; |
1da177e4 LT |
2648 | lval = (unsigned long)-val; |
2649 | } else { | |
00b7c339 | 2650 | *negp = false; |
1da177e4 LT |
2651 | lval = (unsigned long)val; |
2652 | } | |
2653 | *lvalp = jiffies_to_msecs(lval); | |
2654 | } | |
2655 | return 0; | |
2656 | } | |
2657 | ||
2658 | /** | |
2659 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2660 | * @table: the sysctl table | |
2661 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2662 | * @buffer: the user buffer |
2663 | * @lenp: the size of the user buffer | |
2664 | * @ppos: file position | |
2665 | * | |
2666 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2667 | * values from/to the user buffer, treated as an ASCII string. | |
2668 | * The values read are assumed to be in seconds, and are converted into | |
2669 | * jiffies. | |
2670 | * | |
2671 | * Returns 0 on success. | |
2672 | */ | |
8d65af78 | 2673 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2674 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2675 | { | |
8d65af78 | 2676 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2677 | do_proc_dointvec_jiffies_conv,NULL); |
2678 | } | |
2679 | ||
2680 | /** | |
2681 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2682 | * @table: the sysctl table | |
2683 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2684 | * @buffer: the user buffer |
2685 | * @lenp: the size of the user buffer | |
1e5d5331 | 2686 | * @ppos: pointer to the file position |
1da177e4 LT |
2687 | * |
2688 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2689 | * values from/to the user buffer, treated as an ASCII string. | |
2690 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2691 | * are converted into jiffies. | |
2692 | * | |
2693 | * Returns 0 on success. | |
2694 | */ | |
8d65af78 | 2695 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2696 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2697 | { | |
8d65af78 | 2698 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2699 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2700 | } | |
2701 | ||
2702 | /** | |
2703 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2704 | * @table: the sysctl table | |
2705 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2706 | * @buffer: the user buffer |
2707 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2708 | * @ppos: file position |
2709 | * @ppos: the current position in the file | |
1da177e4 LT |
2710 | * |
2711 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2712 | * values from/to the user buffer, treated as an ASCII string. | |
2713 | * The values read are assumed to be in 1/1000 seconds, and | |
2714 | * are converted into jiffies. | |
2715 | * | |
2716 | * Returns 0 on success. | |
2717 | */ | |
8d65af78 | 2718 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2719 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2720 | { | |
8d65af78 | 2721 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2722 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2723 | } | |
2724 | ||
8d65af78 | 2725 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2726 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2727 | { | |
2728 | struct pid *new_pid; | |
2729 | pid_t tmp; | |
2730 | int r; | |
2731 | ||
6c5f3e7b | 2732 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2733 | |
8d65af78 | 2734 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2735 | lenp, ppos, NULL, NULL); |
2736 | if (r || !write) | |
2737 | return r; | |
2738 | ||
2739 | new_pid = find_get_pid(tmp); | |
2740 | if (!new_pid) | |
2741 | return -ESRCH; | |
2742 | ||
2743 | put_pid(xchg(&cad_pid, new_pid)); | |
2744 | return 0; | |
2745 | } | |
2746 | ||
9f977fb7 OP |
2747 | /** |
2748 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2749 | * @table: the sysctl table | |
2750 | * @write: %TRUE if this is a write to the sysctl file | |
2751 | * @buffer: the user buffer | |
2752 | * @lenp: the size of the user buffer | |
2753 | * @ppos: file position | |
2754 | * | |
2755 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2756 | * in table->maxlen. | |
2757 | * | |
2758 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2759 | * large bitmaps may be represented in a compact manner. Writing into | |
2760 | * the file will clear the bitmap then update it with the given input. | |
2761 | * | |
2762 | * Returns 0 on success. | |
2763 | */ | |
2764 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2765 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2766 | { | |
2767 | int err = 0; | |
2768 | bool first = 1; | |
2769 | size_t left = *lenp; | |
2770 | unsigned long bitmap_len = table->maxlen; | |
2771 | unsigned long *bitmap = (unsigned long *) table->data; | |
2772 | unsigned long *tmp_bitmap = NULL; | |
2773 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2774 | ||
2775 | if (!bitmap_len || !left || (*ppos && !write)) { | |
2776 | *lenp = 0; | |
2777 | return 0; | |
2778 | } | |
2779 | ||
2780 | if (write) { | |
2781 | unsigned long page = 0; | |
2782 | char *kbuf; | |
2783 | ||
2784 | if (left > PAGE_SIZE - 1) | |
2785 | left = PAGE_SIZE - 1; | |
2786 | ||
2787 | page = __get_free_page(GFP_TEMPORARY); | |
2788 | kbuf = (char *) page; | |
2789 | if (!kbuf) | |
2790 | return -ENOMEM; | |
2791 | if (copy_from_user(kbuf, buffer, left)) { | |
2792 | free_page(page); | |
2793 | return -EFAULT; | |
2794 | } | |
2795 | kbuf[left] = 0; | |
2796 | ||
2797 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2798 | GFP_KERNEL); | |
2799 | if (!tmp_bitmap) { | |
2800 | free_page(page); | |
2801 | return -ENOMEM; | |
2802 | } | |
2803 | proc_skip_char(&kbuf, &left, '\n'); | |
2804 | while (!err && left) { | |
2805 | unsigned long val_a, val_b; | |
2806 | bool neg; | |
2807 | ||
2808 | err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a, | |
2809 | sizeof(tr_a), &c); | |
2810 | if (err) | |
2811 | break; | |
2812 | if (val_a >= bitmap_len || neg) { | |
2813 | err = -EINVAL; | |
2814 | break; | |
2815 | } | |
2816 | ||
2817 | val_b = val_a; | |
2818 | if (left) { | |
2819 | kbuf++; | |
2820 | left--; | |
2821 | } | |
2822 | ||
2823 | if (c == '-') { | |
2824 | err = proc_get_long(&kbuf, &left, &val_b, | |
2825 | &neg, tr_b, sizeof(tr_b), | |
2826 | &c); | |
2827 | if (err) | |
2828 | break; | |
2829 | if (val_b >= bitmap_len || neg || | |
2830 | val_a > val_b) { | |
2831 | err = -EINVAL; | |
2832 | break; | |
2833 | } | |
2834 | if (left) { | |
2835 | kbuf++; | |
2836 | left--; | |
2837 | } | |
2838 | } | |
2839 | ||
2840 | while (val_a <= val_b) | |
2841 | set_bit(val_a++, tmp_bitmap); | |
2842 | ||
2843 | first = 0; | |
2844 | proc_skip_char(&kbuf, &left, '\n'); | |
2845 | } | |
2846 | free_page(page); | |
2847 | } else { | |
2848 | unsigned long bit_a, bit_b = 0; | |
2849 | ||
2850 | while (left) { | |
2851 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
2852 | if (bit_a >= bitmap_len) | |
2853 | break; | |
2854 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
2855 | bit_a + 1) - 1; | |
2856 | ||
2857 | if (!first) { | |
2858 | err = proc_put_char(&buffer, &left, ','); | |
2859 | if (err) | |
2860 | break; | |
2861 | } | |
2862 | err = proc_put_long(&buffer, &left, bit_a, false); | |
2863 | if (err) | |
2864 | break; | |
2865 | if (bit_a != bit_b) { | |
2866 | err = proc_put_char(&buffer, &left, '-'); | |
2867 | if (err) | |
2868 | break; | |
2869 | err = proc_put_long(&buffer, &left, bit_b, false); | |
2870 | if (err) | |
2871 | break; | |
2872 | } | |
2873 | ||
2874 | first = 0; bit_b++; | |
2875 | } | |
2876 | if (!err) | |
2877 | err = proc_put_char(&buffer, &left, '\n'); | |
2878 | } | |
2879 | ||
2880 | if (!err) { | |
2881 | if (write) { | |
2882 | if (*ppos) | |
2883 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
2884 | else | |
2885 | memcpy(bitmap, tmp_bitmap, | |
2886 | BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long)); | |
2887 | } | |
2888 | kfree(tmp_bitmap); | |
2889 | *lenp -= left; | |
2890 | *ppos += *lenp; | |
2891 | return 0; | |
2892 | } else { | |
2893 | kfree(tmp_bitmap); | |
2894 | return err; | |
2895 | } | |
2896 | } | |
2897 | ||
55610500 | 2898 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2899 | |
8d65af78 | 2900 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2901 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2902 | { | |
2903 | return -ENOSYS; | |
2904 | } | |
2905 | ||
8d65af78 | 2906 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2907 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2908 | { |
2909 | return -ENOSYS; | |
2910 | } | |
2911 | ||
8d65af78 | 2912 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2913 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2914 | { | |
2915 | return -ENOSYS; | |
2916 | } | |
2917 | ||
8d65af78 | 2918 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2919 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2920 | { | |
2921 | return -ENOSYS; | |
2922 | } | |
2923 | ||
8d65af78 | 2924 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2925 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2926 | { | |
2927 | return -ENOSYS; | |
2928 | } | |
2929 | ||
8d65af78 | 2930 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2931 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2932 | { | |
2933 | return -ENOSYS; | |
2934 | } | |
2935 | ||
8d65af78 | 2936 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2937 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2938 | { | |
2939 | return -ENOSYS; | |
2940 | } | |
2941 | ||
d8217f07 | 2942 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2943 | void __user *buffer, |
2944 | size_t *lenp, loff_t *ppos) | |
2945 | { | |
2946 | return -ENOSYS; | |
2947 | } | |
2948 | ||
2949 | ||
55610500 | 2950 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2951 | |
1da177e4 LT |
2952 | /* |
2953 | * No sense putting this after each symbol definition, twice, | |
2954 | * exception granted :-) | |
2955 | */ | |
2956 | EXPORT_SYMBOL(proc_dointvec); | |
2957 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2958 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2959 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2960 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2961 | EXPORT_SYMBOL(proc_dostring); | |
2962 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2963 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); | |
2964 | EXPORT_SYMBOL(register_sysctl_table); | |
29e796fd | 2965 | EXPORT_SYMBOL(register_sysctl_paths); |
1da177e4 | 2966 | EXPORT_SYMBOL(unregister_sysctl_table); |