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> |
17f60a7d | 59 | #include <linux/kmod.h> |
73efc039 | 60 | #include <linux/capability.h> |
1da177e4 LT |
61 | |
62 | #include <asm/uaccess.h> | |
63 | #include <asm/processor.h> | |
64 | ||
29cbc78b AK |
65 | #ifdef CONFIG_X86 |
66 | #include <asm/nmi.h> | |
0741f4d2 | 67 | #include <asm/stacktrace.h> |
6e7c4025 | 68 | #include <asm/io.h> |
29cbc78b | 69 | #endif |
c55b7c3e DY |
70 | #ifdef CONFIG_BSD_PROCESS_ACCT |
71 | #include <linux/acct.h> | |
72 | #endif | |
4f0e056f DY |
73 | #ifdef CONFIG_RT_MUTEXES |
74 | #include <linux/rtmutex.h> | |
75 | #endif | |
2edf5e49 DY |
76 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
77 | #include <linux/lockdep.h> | |
78 | #endif | |
15485a46 DY |
79 | #ifdef CONFIG_CHR_DEV_SG |
80 | #include <scsi/sg.h> | |
81 | #endif | |
29cbc78b | 82 | |
58687acb | 83 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
84 | #include <linux/nmi.h> |
85 | #endif | |
86 | ||
7058cb02 | 87 | |
1da177e4 LT |
88 | #if defined(CONFIG_SYSCTL) |
89 | ||
90 | /* External variables not in a header file. */ | |
1da177e4 LT |
91 | extern int sysctl_overcommit_memory; |
92 | extern int sysctl_overcommit_ratio; | |
93 | extern int max_threads; | |
1da177e4 | 94 | extern int core_uses_pid; |
d6e71144 | 95 | extern int suid_dumpable; |
1da177e4 | 96 | extern char core_pattern[]; |
a293980c | 97 | extern unsigned int core_pipe_limit; |
1da177e4 LT |
98 | extern int pid_max; |
99 | extern int min_free_kbytes; | |
1da177e4 | 100 | extern int pid_max_min, pid_max_max; |
9d0243bc | 101 | extern int sysctl_drop_caches; |
8ad4b1fb | 102 | extern int percpu_pagelist_fraction; |
bebfa101 | 103 | extern int compat_log; |
9745512c | 104 | extern int latencytop_enabled; |
eceea0b3 | 105 | extern int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
106 | #ifndef CONFIG_MMU |
107 | extern int sysctl_nr_trim_pages; | |
108 | #endif | |
cb684b5b | 109 | #ifdef CONFIG_BLOCK |
5e605b64 | 110 | extern int blk_iopoll_enabled; |
cb684b5b | 111 | #endif |
1da177e4 | 112 | |
c4f3b63f | 113 | /* Constants used for minimum and maximum */ |
2508ce18 | 114 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f | 115 | static int sixty = 60; |
9383d967 | 116 | static int neg_one = -1; |
c4f3b63f RT |
117 | #endif |
118 | ||
c4f3b63f | 119 | static int zero; |
cd5f9a4c LT |
120 | static int __maybe_unused one = 1; |
121 | static int __maybe_unused two = 2; | |
cb16e95f | 122 | static int __maybe_unused three = 3; |
fc3501d4 | 123 | static unsigned long one_ul = 1; |
c4f3b63f | 124 | static int one_hundred = 100; |
af91322e DY |
125 | #ifdef CONFIG_PRINTK |
126 | static int ten_thousand = 10000; | |
127 | #endif | |
c4f3b63f | 128 | |
9e4a5bda AR |
129 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
130 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
131 | ||
1da177e4 LT |
132 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
133 | static int maxolduid = 65535; | |
134 | static int minolduid; | |
8ad4b1fb | 135 | static int min_percpu_pagelist_fract = 8; |
1da177e4 LT |
136 | |
137 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 138 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 139 | |
d14f1729 DY |
140 | #ifdef CONFIG_INOTIFY_USER |
141 | #include <linux/inotify.h> | |
142 | #endif | |
72c57ed5 | 143 | #ifdef CONFIG_SPARC |
17f04fbb | 144 | #include <asm/system.h> |
1da177e4 LT |
145 | #endif |
146 | ||
0871420f DM |
147 | #ifdef CONFIG_SPARC64 |
148 | extern int sysctl_tsb_ratio; | |
149 | #endif | |
150 | ||
1da177e4 LT |
151 | #ifdef __hppa__ |
152 | extern int pwrsw_enabled; | |
153 | extern int unaligned_enabled; | |
154 | #endif | |
1da177e4 | 155 | |
d2b176ed JS |
156 | #ifdef CONFIG_IA64 |
157 | extern int no_unaligned_warning; | |
88fc241f | 158 | extern int unaligned_dump_stack; |
d2b176ed JS |
159 | #endif |
160 | ||
d6f8ff73 | 161 | #ifdef CONFIG_PROC_SYSCTL |
8d65af78 | 162 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 163 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 164 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 165 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 166 | #endif |
9ec52099 | 167 | |
bfdc0b49 RW |
168 | #ifdef CONFIG_PRINTK |
169 | static int proc_dmesg_restrict(struct ctl_table *table, int write, | |
170 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
171 | #endif | |
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 EB |
195 | static struct ctl_table kern_table[]; |
196 | static struct ctl_table vm_table[]; | |
197 | static struct ctl_table fs_table[]; | |
198 | static struct ctl_table debug_table[]; | |
199 | static struct ctl_table dev_table[]; | |
200 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
201 | #ifdef CONFIG_EPOLL |
202 | extern struct ctl_table epoll_table[]; | |
203 | #endif | |
1da177e4 LT |
204 | |
205 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
206 | int sysctl_legacy_va_layout; | |
207 | #endif | |
208 | ||
1da177e4 LT |
209 | /* The default sysctl tables: */ |
210 | ||
de4e83bd | 211 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 212 | { |
1da177e4 LT |
213 | .procname = "kernel", |
214 | .mode = 0555, | |
215 | .child = kern_table, | |
216 | }, | |
217 | { | |
1da177e4 LT |
218 | .procname = "vm", |
219 | .mode = 0555, | |
220 | .child = vm_table, | |
221 | }, | |
1da177e4 | 222 | { |
1da177e4 LT |
223 | .procname = "fs", |
224 | .mode = 0555, | |
225 | .child = fs_table, | |
226 | }, | |
227 | { | |
1da177e4 LT |
228 | .procname = "debug", |
229 | .mode = 0555, | |
230 | .child = debug_table, | |
231 | }, | |
232 | { | |
1da177e4 LT |
233 | .procname = "dev", |
234 | .mode = 0555, | |
235 | .child = dev_table, | |
236 | }, | |
6fce56ec | 237 | { } |
1da177e4 LT |
238 | }; |
239 | ||
77e54a1f | 240 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
241 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
242 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
243 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
244 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
1983a922 CE |
245 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
246 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
77e54a1f IM |
247 | #endif |
248 | ||
5e771905 MG |
249 | #ifdef CONFIG_COMPACTION |
250 | static int min_extfrag_threshold; | |
251 | static int max_extfrag_threshold = 1000; | |
252 | #endif | |
253 | ||
d8217f07 | 254 | static struct ctl_table kern_table[] = { |
2bba22c5 | 255 | { |
2bba22c5 MG |
256 | .procname = "sched_child_runs_first", |
257 | .data = &sysctl_sched_child_runs_first, | |
258 | .maxlen = sizeof(unsigned int), | |
259 | .mode = 0644, | |
6d456111 | 260 | .proc_handler = proc_dointvec, |
2bba22c5 | 261 | }, |
77e54a1f IM |
262 | #ifdef CONFIG_SCHED_DEBUG |
263 | { | |
b2be5e96 PZ |
264 | .procname = "sched_min_granularity_ns", |
265 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
266 | .maxlen = sizeof(unsigned int), |
267 | .mode = 0644, | |
702a7c76 | 268 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
269 | .extra1 = &min_sched_granularity_ns, |
270 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 271 | }, |
21805085 | 272 | { |
21805085 PZ |
273 | .procname = "sched_latency_ns", |
274 | .data = &sysctl_sched_latency, | |
275 | .maxlen = sizeof(unsigned int), | |
276 | .mode = 0644, | |
702a7c76 | 277 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
278 | .extra1 = &min_sched_granularity_ns, |
279 | .extra2 = &max_sched_granularity_ns, | |
280 | }, | |
77e54a1f | 281 | { |
77e54a1f IM |
282 | .procname = "sched_wakeup_granularity_ns", |
283 | .data = &sysctl_sched_wakeup_granularity, | |
284 | .maxlen = sizeof(unsigned int), | |
285 | .mode = 0644, | |
702a7c76 | 286 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
287 | .extra1 = &min_wakeup_granularity_ns, |
288 | .extra2 = &max_wakeup_granularity_ns, | |
289 | }, | |
1983a922 | 290 | { |
1983a922 CE |
291 | .procname = "sched_tunable_scaling", |
292 | .data = &sysctl_sched_tunable_scaling, | |
293 | .maxlen = sizeof(enum sched_tunable_scaling), | |
294 | .mode = 0644, | |
702a7c76 | 295 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
296 | .extra1 = &min_sched_tunable_scaling, |
297 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 298 | }, |
da84d961 | 299 | { |
da84d961 IM |
300 | .procname = "sched_migration_cost", |
301 | .data = &sysctl_sched_migration_cost, | |
302 | .maxlen = sizeof(unsigned int), | |
303 | .mode = 0644, | |
6d456111 | 304 | .proc_handler = proc_dointvec, |
da84d961 | 305 | }, |
b82d9fdd | 306 | { |
b82d9fdd PZ |
307 | .procname = "sched_nr_migrate", |
308 | .data = &sysctl_sched_nr_migrate, | |
309 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 310 | .mode = 0644, |
6d456111 | 311 | .proc_handler = proc_dointvec, |
fa85ae24 | 312 | }, |
e9e9250b | 313 | { |
e9e9250b PZ |
314 | .procname = "sched_time_avg", |
315 | .data = &sysctl_sched_time_avg, | |
316 | .maxlen = sizeof(unsigned int), | |
317 | .mode = 0644, | |
6d456111 | 318 | .proc_handler = proc_dointvec, |
e9e9250b | 319 | }, |
a7a4f8a7 PT |
320 | { |
321 | .procname = "sched_shares_window", | |
322 | .data = &sysctl_sched_shares_window, | |
323 | .maxlen = sizeof(unsigned int), | |
324 | .mode = 0644, | |
325 | .proc_handler = proc_dointvec, | |
326 | }, | |
cd1bb94b | 327 | { |
cd1bb94b AB |
328 | .procname = "timer_migration", |
329 | .data = &sysctl_timer_migration, | |
330 | .maxlen = sizeof(unsigned int), | |
331 | .mode = 0644, | |
6d456111 | 332 | .proc_handler = proc_dointvec_minmax, |
bfdb4d9f AB |
333 | .extra1 = &zero, |
334 | .extra2 = &one, | |
fa85ae24 | 335 | }, |
1fc84aaa | 336 | #endif |
9f0c1e56 | 337 | { |
9f0c1e56 PZ |
338 | .procname = "sched_rt_period_us", |
339 | .data = &sysctl_sched_rt_period, | |
340 | .maxlen = sizeof(unsigned int), | |
341 | .mode = 0644, | |
6d456111 | 342 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
343 | }, |
344 | { | |
9f0c1e56 PZ |
345 | .procname = "sched_rt_runtime_us", |
346 | .data = &sysctl_sched_rt_runtime, | |
347 | .maxlen = sizeof(int), | |
348 | .mode = 0644, | |
6d456111 | 349 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 350 | }, |
5091faa4 MG |
351 | #ifdef CONFIG_SCHED_AUTOGROUP |
352 | { | |
353 | .procname = "sched_autogroup_enabled", | |
354 | .data = &sysctl_sched_autogroup_enabled, | |
355 | .maxlen = sizeof(unsigned int), | |
356 | .mode = 0644, | |
1747b21f | 357 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
358 | .extra1 = &zero, |
359 | .extra2 = &one, | |
360 | }, | |
361 | #endif | |
ec12cb7f PT |
362 | #ifdef CONFIG_CFS_BANDWIDTH |
363 | { | |
364 | .procname = "sched_cfs_bandwidth_slice_us", | |
365 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
366 | .maxlen = sizeof(unsigned int), | |
367 | .mode = 0644, | |
368 | .proc_handler = proc_dointvec_minmax, | |
369 | .extra1 = &one, | |
370 | }, | |
371 | #endif | |
f20786ff PZ |
372 | #ifdef CONFIG_PROVE_LOCKING |
373 | { | |
f20786ff PZ |
374 | .procname = "prove_locking", |
375 | .data = &prove_locking, | |
376 | .maxlen = sizeof(int), | |
377 | .mode = 0644, | |
6d456111 | 378 | .proc_handler = proc_dointvec, |
f20786ff PZ |
379 | }, |
380 | #endif | |
381 | #ifdef CONFIG_LOCK_STAT | |
382 | { | |
f20786ff PZ |
383 | .procname = "lock_stat", |
384 | .data = &lock_stat, | |
385 | .maxlen = sizeof(int), | |
386 | .mode = 0644, | |
6d456111 | 387 | .proc_handler = proc_dointvec, |
f20786ff | 388 | }, |
77e54a1f | 389 | #endif |
1da177e4 | 390 | { |
1da177e4 LT |
391 | .procname = "panic", |
392 | .data = &panic_timeout, | |
393 | .maxlen = sizeof(int), | |
394 | .mode = 0644, | |
6d456111 | 395 | .proc_handler = proc_dointvec, |
1da177e4 LT |
396 | }, |
397 | { | |
1da177e4 LT |
398 | .procname = "core_uses_pid", |
399 | .data = &core_uses_pid, | |
400 | .maxlen = sizeof(int), | |
401 | .mode = 0644, | |
6d456111 | 402 | .proc_handler = proc_dointvec, |
1da177e4 LT |
403 | }, |
404 | { | |
1da177e4 LT |
405 | .procname = "core_pattern", |
406 | .data = core_pattern, | |
71ce92f3 | 407 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 408 | .mode = 0644, |
6d456111 | 409 | .proc_handler = proc_dostring, |
1da177e4 | 410 | }, |
a293980c | 411 | { |
a293980c NH |
412 | .procname = "core_pipe_limit", |
413 | .data = &core_pipe_limit, | |
414 | .maxlen = sizeof(unsigned int), | |
415 | .mode = 0644, | |
6d456111 | 416 | .proc_handler = proc_dointvec, |
a293980c | 417 | }, |
34f5a398 | 418 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 419 | { |
1da177e4 | 420 | .procname = "tainted", |
25ddbb18 | 421 | .maxlen = sizeof(long), |
34f5a398 | 422 | .mode = 0644, |
6d456111 | 423 | .proc_handler = proc_taint, |
1da177e4 | 424 | }, |
34f5a398 | 425 | #endif |
9745512c AV |
426 | #ifdef CONFIG_LATENCYTOP |
427 | { | |
428 | .procname = "latencytop", | |
429 | .data = &latencytop_enabled, | |
430 | .maxlen = sizeof(int), | |
431 | .mode = 0644, | |
6d456111 | 432 | .proc_handler = proc_dointvec, |
9745512c AV |
433 | }, |
434 | #endif | |
1da177e4 LT |
435 | #ifdef CONFIG_BLK_DEV_INITRD |
436 | { | |
1da177e4 LT |
437 | .procname = "real-root-dev", |
438 | .data = &real_root_dev, | |
439 | .maxlen = sizeof(int), | |
440 | .mode = 0644, | |
6d456111 | 441 | .proc_handler = proc_dointvec, |
1da177e4 LT |
442 | }, |
443 | #endif | |
45807a1d | 444 | { |
45807a1d IM |
445 | .procname = "print-fatal-signals", |
446 | .data = &print_fatal_signals, | |
447 | .maxlen = sizeof(int), | |
448 | .mode = 0644, | |
6d456111 | 449 | .proc_handler = proc_dointvec, |
45807a1d | 450 | }, |
72c57ed5 | 451 | #ifdef CONFIG_SPARC |
1da177e4 | 452 | { |
1da177e4 LT |
453 | .procname = "reboot-cmd", |
454 | .data = reboot_command, | |
455 | .maxlen = 256, | |
456 | .mode = 0644, | |
6d456111 | 457 | .proc_handler = proc_dostring, |
1da177e4 LT |
458 | }, |
459 | { | |
1da177e4 LT |
460 | .procname = "stop-a", |
461 | .data = &stop_a_enabled, | |
462 | .maxlen = sizeof (int), | |
463 | .mode = 0644, | |
6d456111 | 464 | .proc_handler = proc_dointvec, |
1da177e4 LT |
465 | }, |
466 | { | |
1da177e4 LT |
467 | .procname = "scons-poweroff", |
468 | .data = &scons_pwroff, | |
469 | .maxlen = sizeof (int), | |
470 | .mode = 0644, | |
6d456111 | 471 | .proc_handler = proc_dointvec, |
1da177e4 LT |
472 | }, |
473 | #endif | |
0871420f DM |
474 | #ifdef CONFIG_SPARC64 |
475 | { | |
0871420f DM |
476 | .procname = "tsb-ratio", |
477 | .data = &sysctl_tsb_ratio, | |
478 | .maxlen = sizeof (int), | |
479 | .mode = 0644, | |
6d456111 | 480 | .proc_handler = proc_dointvec, |
0871420f DM |
481 | }, |
482 | #endif | |
1da177e4 LT |
483 | #ifdef __hppa__ |
484 | { | |
1da177e4 LT |
485 | .procname = "soft-power", |
486 | .data = &pwrsw_enabled, | |
487 | .maxlen = sizeof (int), | |
488 | .mode = 0644, | |
6d456111 | 489 | .proc_handler = proc_dointvec, |
1da177e4 LT |
490 | }, |
491 | { | |
1da177e4 LT |
492 | .procname = "unaligned-trap", |
493 | .data = &unaligned_enabled, | |
494 | .maxlen = sizeof (int), | |
495 | .mode = 0644, | |
6d456111 | 496 | .proc_handler = proc_dointvec, |
1da177e4 LT |
497 | }, |
498 | #endif | |
499 | { | |
1da177e4 LT |
500 | .procname = "ctrl-alt-del", |
501 | .data = &C_A_D, | |
502 | .maxlen = sizeof(int), | |
503 | .mode = 0644, | |
6d456111 | 504 | .proc_handler = proc_dointvec, |
1da177e4 | 505 | }, |
606576ce | 506 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 507 | { |
b0fc494f SR |
508 | .procname = "ftrace_enabled", |
509 | .data = &ftrace_enabled, | |
510 | .maxlen = sizeof(int), | |
511 | .mode = 0644, | |
6d456111 | 512 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
513 | }, |
514 | #endif | |
f38f1d2a SR |
515 | #ifdef CONFIG_STACK_TRACER |
516 | { | |
f38f1d2a SR |
517 | .procname = "stack_tracer_enabled", |
518 | .data = &stack_tracer_enabled, | |
519 | .maxlen = sizeof(int), | |
520 | .mode = 0644, | |
6d456111 | 521 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
522 | }, |
523 | #endif | |
944ac425 SR |
524 | #ifdef CONFIG_TRACING |
525 | { | |
3299b4dd | 526 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
527 | .data = &ftrace_dump_on_oops, |
528 | .maxlen = sizeof(int), | |
529 | .mode = 0644, | |
6d456111 | 530 | .proc_handler = proc_dointvec, |
944ac425 SR |
531 | }, |
532 | #endif | |
a1ef5adb | 533 | #ifdef CONFIG_MODULES |
1da177e4 | 534 | { |
1da177e4 LT |
535 | .procname = "modprobe", |
536 | .data = &modprobe_path, | |
537 | .maxlen = KMOD_PATH_LEN, | |
538 | .mode = 0644, | |
6d456111 | 539 | .proc_handler = proc_dostring, |
1da177e4 | 540 | }, |
3d43321b | 541 | { |
3d43321b KC |
542 | .procname = "modules_disabled", |
543 | .data = &modules_disabled, | |
544 | .maxlen = sizeof(int), | |
545 | .mode = 0644, | |
546 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 547 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
548 | .extra1 = &one, |
549 | .extra2 = &one, | |
550 | }, | |
1da177e4 | 551 | #endif |
94f17cd7 | 552 | #ifdef CONFIG_HOTPLUG |
1da177e4 | 553 | { |
1da177e4 | 554 | .procname = "hotplug", |
312c004d KS |
555 | .data = &uevent_helper, |
556 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 557 | .mode = 0644, |
6d456111 | 558 | .proc_handler = proc_dostring, |
1da177e4 LT |
559 | }, |
560 | #endif | |
561 | #ifdef CONFIG_CHR_DEV_SG | |
562 | { | |
1da177e4 LT |
563 | .procname = "sg-big-buff", |
564 | .data = &sg_big_buff, | |
565 | .maxlen = sizeof (int), | |
566 | .mode = 0444, | |
6d456111 | 567 | .proc_handler = proc_dointvec, |
1da177e4 LT |
568 | }, |
569 | #endif | |
570 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
571 | { | |
1da177e4 LT |
572 | .procname = "acct", |
573 | .data = &acct_parm, | |
574 | .maxlen = 3*sizeof(int), | |
575 | .mode = 0644, | |
6d456111 | 576 | .proc_handler = proc_dointvec, |
1da177e4 LT |
577 | }, |
578 | #endif | |
1da177e4 LT |
579 | #ifdef CONFIG_MAGIC_SYSRQ |
580 | { | |
1da177e4 | 581 | .procname = "sysrq", |
5d6f647f | 582 | .data = &__sysrq_enabled, |
1da177e4 LT |
583 | .maxlen = sizeof (int), |
584 | .mode = 0644, | |
97f5f0cd | 585 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
586 | }, |
587 | #endif | |
d6f8ff73 | 588 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 589 | { |
1da177e4 | 590 | .procname = "cad_pid", |
9ec52099 | 591 | .data = NULL, |
1da177e4 LT |
592 | .maxlen = sizeof (int), |
593 | .mode = 0600, | |
6d456111 | 594 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 595 | }, |
d6f8ff73 | 596 | #endif |
1da177e4 | 597 | { |
1da177e4 LT |
598 | .procname = "threads-max", |
599 | .data = &max_threads, | |
600 | .maxlen = sizeof(int), | |
601 | .mode = 0644, | |
6d456111 | 602 | .proc_handler = proc_dointvec, |
1da177e4 LT |
603 | }, |
604 | { | |
1da177e4 LT |
605 | .procname = "random", |
606 | .mode = 0555, | |
607 | .child = random_table, | |
608 | }, | |
17f60a7d EP |
609 | { |
610 | .procname = "usermodehelper", | |
611 | .mode = 0555, | |
612 | .child = usermodehelper_table, | |
613 | }, | |
1da177e4 | 614 | { |
1da177e4 LT |
615 | .procname = "overflowuid", |
616 | .data = &overflowuid, | |
617 | .maxlen = sizeof(int), | |
618 | .mode = 0644, | |
6d456111 | 619 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
620 | .extra1 = &minolduid, |
621 | .extra2 = &maxolduid, | |
622 | }, | |
623 | { | |
1da177e4 LT |
624 | .procname = "overflowgid", |
625 | .data = &overflowgid, | |
626 | .maxlen = sizeof(int), | |
627 | .mode = 0644, | |
6d456111 | 628 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
629 | .extra1 = &minolduid, |
630 | .extra2 = &maxolduid, | |
631 | }, | |
347a8dc3 | 632 | #ifdef CONFIG_S390 |
1da177e4 LT |
633 | #ifdef CONFIG_MATHEMU |
634 | { | |
1da177e4 LT |
635 | .procname = "ieee_emulation_warnings", |
636 | .data = &sysctl_ieee_emulation_warnings, | |
637 | .maxlen = sizeof(int), | |
638 | .mode = 0644, | |
6d456111 | 639 | .proc_handler = proc_dointvec, |
1da177e4 | 640 | }, |
1da177e4 LT |
641 | #endif |
642 | { | |
1da177e4 | 643 | .procname = "userprocess_debug", |
ab3c68ee | 644 | .data = &show_unhandled_signals, |
1da177e4 LT |
645 | .maxlen = sizeof(int), |
646 | .mode = 0644, | |
6d456111 | 647 | .proc_handler = proc_dointvec, |
1da177e4 LT |
648 | }, |
649 | #endif | |
650 | { | |
1da177e4 LT |
651 | .procname = "pid_max", |
652 | .data = &pid_max, | |
653 | .maxlen = sizeof (int), | |
654 | .mode = 0644, | |
6d456111 | 655 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
656 | .extra1 = &pid_max_min, |
657 | .extra2 = &pid_max_max, | |
658 | }, | |
659 | { | |
1da177e4 LT |
660 | .procname = "panic_on_oops", |
661 | .data = &panic_on_oops, | |
662 | .maxlen = sizeof(int), | |
663 | .mode = 0644, | |
6d456111 | 664 | .proc_handler = proc_dointvec, |
1da177e4 | 665 | }, |
7ef3d2fd JP |
666 | #if defined CONFIG_PRINTK |
667 | { | |
7ef3d2fd JP |
668 | .procname = "printk", |
669 | .data = &console_loglevel, | |
670 | .maxlen = 4*sizeof(int), | |
671 | .mode = 0644, | |
6d456111 | 672 | .proc_handler = proc_dointvec, |
7ef3d2fd | 673 | }, |
1da177e4 | 674 | { |
1da177e4 | 675 | .procname = "printk_ratelimit", |
717115e1 | 676 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
677 | .maxlen = sizeof(int), |
678 | .mode = 0644, | |
6d456111 | 679 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
680 | }, |
681 | { | |
1da177e4 | 682 | .procname = "printk_ratelimit_burst", |
717115e1 | 683 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
684 | .maxlen = sizeof(int), |
685 | .mode = 0644, | |
6d456111 | 686 | .proc_handler = proc_dointvec, |
1da177e4 | 687 | }, |
af91322e | 688 | { |
af91322e DY |
689 | .procname = "printk_delay", |
690 | .data = &printk_delay_msec, | |
691 | .maxlen = sizeof(int), | |
692 | .mode = 0644, | |
6d456111 | 693 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
694 | .extra1 = &zero, |
695 | .extra2 = &ten_thousand, | |
696 | }, | |
eaf06b24 DR |
697 | { |
698 | .procname = "dmesg_restrict", | |
699 | .data = &dmesg_restrict, | |
700 | .maxlen = sizeof(int), | |
701 | .mode = 0644, | |
702 | .proc_handler = proc_dointvec_minmax, | |
703 | .extra1 = &zero, | |
704 | .extra2 = &one, | |
705 | }, | |
455cd5ab DR |
706 | { |
707 | .procname = "kptr_restrict", | |
708 | .data = &kptr_restrict, | |
709 | .maxlen = sizeof(int), | |
710 | .mode = 0644, | |
bfdc0b49 | 711 | .proc_handler = proc_dmesg_restrict, |
455cd5ab DR |
712 | .extra1 = &zero, |
713 | .extra2 = &two, | |
714 | }, | |
df6e61d4 | 715 | #endif |
1da177e4 | 716 | { |
1da177e4 LT |
717 | .procname = "ngroups_max", |
718 | .data = &ngroups_max, | |
719 | .maxlen = sizeof (int), | |
720 | .mode = 0444, | |
6d456111 | 721 | .proc_handler = proc_dointvec, |
1da177e4 | 722 | }, |
73efc039 DB |
723 | { |
724 | .procname = "cap_last_cap", | |
725 | .data = (void *)&cap_last_cap, | |
726 | .maxlen = sizeof(int), | |
727 | .mode = 0444, | |
728 | .proc_handler = proc_dointvec, | |
729 | }, | |
58687acb | 730 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 731 | { |
58687acb DZ |
732 | .procname = "watchdog", |
733 | .data = &watchdog_enabled, | |
504d7cf1 DZ |
734 | .maxlen = sizeof (int), |
735 | .mode = 0644, | |
586692a5 MSB |
736 | .proc_handler = proc_dowatchdog, |
737 | .extra1 = &zero, | |
738 | .extra2 = &one, | |
58687acb DZ |
739 | }, |
740 | { | |
741 | .procname = "watchdog_thresh", | |
586692a5 | 742 | .data = &watchdog_thresh, |
58687acb DZ |
743 | .maxlen = sizeof(int), |
744 | .mode = 0644, | |
586692a5 | 745 | .proc_handler = proc_dowatchdog, |
58687acb DZ |
746 | .extra1 = &neg_one, |
747 | .extra2 = &sixty, | |
504d7cf1 | 748 | }, |
2508ce18 DZ |
749 | { |
750 | .procname = "softlockup_panic", | |
751 | .data = &softlockup_panic, | |
752 | .maxlen = sizeof(int), | |
753 | .mode = 0644, | |
754 | .proc_handler = proc_dointvec_minmax, | |
755 | .extra1 = &zero, | |
756 | .extra2 = &one, | |
757 | }, | |
5dc30558 DZ |
758 | { |
759 | .procname = "nmi_watchdog", | |
760 | .data = &watchdog_enabled, | |
761 | .maxlen = sizeof (int), | |
762 | .mode = 0644, | |
586692a5 MSB |
763 | .proc_handler = proc_dowatchdog, |
764 | .extra1 = &zero, | |
765 | .extra2 = &one, | |
5dc30558 DZ |
766 | }, |
767 | #endif | |
768 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
769 | { | |
770 | .procname = "unknown_nmi_panic", | |
771 | .data = &unknown_nmi_panic, | |
772 | .maxlen = sizeof (int), | |
773 | .mode = 0644, | |
774 | .proc_handler = proc_dointvec, | |
775 | }, | |
504d7cf1 | 776 | #endif |
1da177e4 | 777 | #if defined(CONFIG_X86) |
8da5adda | 778 | { |
8da5adda DZ |
779 | .procname = "panic_on_unrecovered_nmi", |
780 | .data = &panic_on_unrecovered_nmi, | |
781 | .maxlen = sizeof(int), | |
782 | .mode = 0644, | |
6d456111 | 783 | .proc_handler = proc_dointvec, |
8da5adda | 784 | }, |
5211a242 | 785 | { |
5211a242 KG |
786 | .procname = "panic_on_io_nmi", |
787 | .data = &panic_on_io_nmi, | |
788 | .maxlen = sizeof(int), | |
789 | .mode = 0644, | |
6d456111 | 790 | .proc_handler = proc_dointvec, |
5211a242 | 791 | }, |
55af7796 MH |
792 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
793 | { | |
794 | .procname = "panic_on_stackoverflow", | |
795 | .data = &sysctl_panic_on_stackoverflow, | |
796 | .maxlen = sizeof(int), | |
797 | .mode = 0644, | |
798 | .proc_handler = proc_dointvec, | |
799 | }, | |
800 | #endif | |
1da177e4 | 801 | { |
1da177e4 LT |
802 | .procname = "bootloader_type", |
803 | .data = &bootloader_type, | |
804 | .maxlen = sizeof (int), | |
805 | .mode = 0444, | |
6d456111 | 806 | .proc_handler = proc_dointvec, |
1da177e4 | 807 | }, |
5031296c | 808 | { |
5031296c PA |
809 | .procname = "bootloader_version", |
810 | .data = &bootloader_version, | |
811 | .maxlen = sizeof (int), | |
812 | .mode = 0444, | |
6d456111 | 813 | .proc_handler = proc_dointvec, |
5031296c | 814 | }, |
0741f4d2 | 815 | { |
0741f4d2 CE |
816 | .procname = "kstack_depth_to_print", |
817 | .data = &kstack_depth_to_print, | |
818 | .maxlen = sizeof(int), | |
819 | .mode = 0644, | |
6d456111 | 820 | .proc_handler = proc_dointvec, |
0741f4d2 | 821 | }, |
6e7c4025 | 822 | { |
6e7c4025 IM |
823 | .procname = "io_delay_type", |
824 | .data = &io_delay_type, | |
825 | .maxlen = sizeof(int), | |
826 | .mode = 0644, | |
6d456111 | 827 | .proc_handler = proc_dointvec, |
6e7c4025 | 828 | }, |
1da177e4 | 829 | #endif |
7a9166e3 | 830 | #if defined(CONFIG_MMU) |
1da177e4 | 831 | { |
1da177e4 LT |
832 | .procname = "randomize_va_space", |
833 | .data = &randomize_va_space, | |
834 | .maxlen = sizeof(int), | |
835 | .mode = 0644, | |
6d456111 | 836 | .proc_handler = proc_dointvec, |
1da177e4 | 837 | }, |
7a9166e3 | 838 | #endif |
0152fb37 | 839 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 840 | { |
951f22d5 MS |
841 | .procname = "spin_retry", |
842 | .data = &spin_retry, | |
843 | .maxlen = sizeof (int), | |
844 | .mode = 0644, | |
6d456111 | 845 | .proc_handler = proc_dointvec, |
951f22d5 | 846 | }, |
c255d844 | 847 | #endif |
673d5b43 | 848 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 849 | { |
c255d844 | 850 | .procname = "acpi_video_flags", |
77afcf78 | 851 | .data = &acpi_realmode_flags, |
c255d844 PM |
852 | .maxlen = sizeof (unsigned long), |
853 | .mode = 0644, | |
6d456111 | 854 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 855 | }, |
d2b176ed JS |
856 | #endif |
857 | #ifdef CONFIG_IA64 | |
858 | { | |
d2b176ed JS |
859 | .procname = "ignore-unaligned-usertrap", |
860 | .data = &no_unaligned_warning, | |
861 | .maxlen = sizeof (int), | |
862 | .mode = 0644, | |
6d456111 | 863 | .proc_handler = proc_dointvec, |
d2b176ed | 864 | }, |
88fc241f | 865 | { |
88fc241f DC |
866 | .procname = "unaligned-dump-stack", |
867 | .data = &unaligned_dump_stack, | |
868 | .maxlen = sizeof (int), | |
869 | .mode = 0644, | |
6d456111 | 870 | .proc_handler = proc_dointvec, |
88fc241f | 871 | }, |
bebfa101 | 872 | #endif |
e162b39a MSB |
873 | #ifdef CONFIG_DETECT_HUNG_TASK |
874 | { | |
e162b39a MSB |
875 | .procname = "hung_task_panic", |
876 | .data = &sysctl_hung_task_panic, | |
877 | .maxlen = sizeof(int), | |
878 | .mode = 0644, | |
6d456111 | 879 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
880 | .extra1 = &zero, |
881 | .extra2 = &one, | |
882 | }, | |
82a1fcb9 | 883 | { |
82a1fcb9 IM |
884 | .procname = "hung_task_check_count", |
885 | .data = &sysctl_hung_task_check_count, | |
90739081 | 886 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 887 | .mode = 0644, |
6d456111 | 888 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 IM |
889 | }, |
890 | { | |
82a1fcb9 IM |
891 | .procname = "hung_task_timeout_secs", |
892 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 893 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 894 | .mode = 0644, |
6d456111 | 895 | .proc_handler = proc_dohung_task_timeout_secs, |
82a1fcb9 IM |
896 | }, |
897 | { | |
82a1fcb9 IM |
898 | .procname = "hung_task_warnings", |
899 | .data = &sysctl_hung_task_warnings, | |
90739081 | 900 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 901 | .mode = 0644, |
6d456111 | 902 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 | 903 | }, |
c4f3b63f | 904 | #endif |
bebfa101 AK |
905 | #ifdef CONFIG_COMPAT |
906 | { | |
bebfa101 AK |
907 | .procname = "compat-log", |
908 | .data = &compat_log, | |
909 | .maxlen = sizeof (int), | |
910 | .mode = 0644, | |
6d456111 | 911 | .proc_handler = proc_dointvec, |
bebfa101 | 912 | }, |
951f22d5 | 913 | #endif |
23f78d4a IM |
914 | #ifdef CONFIG_RT_MUTEXES |
915 | { | |
23f78d4a IM |
916 | .procname = "max_lock_depth", |
917 | .data = &max_lock_depth, | |
918 | .maxlen = sizeof(int), | |
919 | .mode = 0644, | |
6d456111 | 920 | .proc_handler = proc_dointvec, |
23f78d4a | 921 | }, |
5096add8 | 922 | #endif |
10a0a8d4 | 923 | { |
10a0a8d4 JF |
924 | .procname = "poweroff_cmd", |
925 | .data = &poweroff_cmd, | |
926 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
927 | .mode = 0644, | |
6d456111 | 928 | .proc_handler = proc_dostring, |
10a0a8d4 | 929 | }, |
0b77f5bf DH |
930 | #ifdef CONFIG_KEYS |
931 | { | |
0b77f5bf DH |
932 | .procname = "keys", |
933 | .mode = 0555, | |
934 | .child = key_sysctls, | |
935 | }, | |
936 | #endif | |
31a72bce PM |
937 | #ifdef CONFIG_RCU_TORTURE_TEST |
938 | { | |
31a72bce PM |
939 | .procname = "rcutorture_runnable", |
940 | .data = &rcutorture_runnable, | |
941 | .maxlen = sizeof(int), | |
942 | .mode = 0644, | |
6d456111 | 943 | .proc_handler = proc_dointvec, |
31a72bce PM |
944 | }, |
945 | #endif | |
cdd6c482 | 946 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
947 | /* |
948 | * User-space scripts rely on the existence of this file | |
949 | * as a feature check for perf_events being enabled. | |
950 | * | |
951 | * So it's an ABI, do not remove! | |
952 | */ | |
1ccd1549 | 953 | { |
cdd6c482 IM |
954 | .procname = "perf_event_paranoid", |
955 | .data = &sysctl_perf_event_paranoid, | |
956 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 957 | .mode = 0644, |
6d456111 | 958 | .proc_handler = proc_dointvec, |
1ccd1549 | 959 | }, |
c5078f78 | 960 | { |
cdd6c482 IM |
961 | .procname = "perf_event_mlock_kb", |
962 | .data = &sysctl_perf_event_mlock, | |
963 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 964 | .mode = 0644, |
6d456111 | 965 | .proc_handler = proc_dointvec, |
c5078f78 | 966 | }, |
a78ac325 | 967 | { |
cdd6c482 IM |
968 | .procname = "perf_event_max_sample_rate", |
969 | .data = &sysctl_perf_event_sample_rate, | |
970 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 971 | .mode = 0644, |
163ec435 | 972 | .proc_handler = perf_proc_update_handler, |
a78ac325 | 973 | }, |
1ccd1549 | 974 | #endif |
dfec072e VN |
975 | #ifdef CONFIG_KMEMCHECK |
976 | { | |
dfec072e VN |
977 | .procname = "kmemcheck", |
978 | .data = &kmemcheck_enabled, | |
979 | .maxlen = sizeof(int), | |
980 | .mode = 0644, | |
6d456111 | 981 | .proc_handler = proc_dointvec, |
dfec072e VN |
982 | }, |
983 | #endif | |
cb684b5b | 984 | #ifdef CONFIG_BLOCK |
5e605b64 | 985 | { |
5e605b64 JA |
986 | .procname = "blk_iopoll", |
987 | .data = &blk_iopoll_enabled, | |
988 | .maxlen = sizeof(int), | |
989 | .mode = 0644, | |
6d456111 | 990 | .proc_handler = proc_dointvec, |
5e605b64 | 991 | }, |
cb684b5b | 992 | #endif |
6fce56ec | 993 | { } |
1da177e4 LT |
994 | }; |
995 | ||
d8217f07 | 996 | static struct ctl_table vm_table[] = { |
1da177e4 | 997 | { |
1da177e4 LT |
998 | .procname = "overcommit_memory", |
999 | .data = &sysctl_overcommit_memory, | |
1000 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1001 | .mode = 0644, | |
cb16e95f PH |
1002 | .proc_handler = proc_dointvec_minmax, |
1003 | .extra1 = &zero, | |
1004 | .extra2 = &two, | |
1da177e4 | 1005 | }, |
fadd8fbd | 1006 | { |
fadd8fbd KH |
1007 | .procname = "panic_on_oom", |
1008 | .data = &sysctl_panic_on_oom, | |
1009 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1010 | .mode = 0644, | |
cb16e95f PH |
1011 | .proc_handler = proc_dointvec_minmax, |
1012 | .extra1 = &zero, | |
1013 | .extra2 = &two, | |
fadd8fbd | 1014 | }, |
fe071d7e | 1015 | { |
fe071d7e DR |
1016 | .procname = "oom_kill_allocating_task", |
1017 | .data = &sysctl_oom_kill_allocating_task, | |
1018 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1019 | .mode = 0644, | |
6d456111 | 1020 | .proc_handler = proc_dointvec, |
fe071d7e | 1021 | }, |
fef1bdd6 | 1022 | { |
fef1bdd6 DR |
1023 | .procname = "oom_dump_tasks", |
1024 | .data = &sysctl_oom_dump_tasks, | |
1025 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1026 | .mode = 0644, | |
6d456111 | 1027 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1028 | }, |
1da177e4 | 1029 | { |
1da177e4 LT |
1030 | .procname = "overcommit_ratio", |
1031 | .data = &sysctl_overcommit_ratio, | |
1032 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1033 | .mode = 0644, | |
6d456111 | 1034 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1035 | }, |
1036 | { | |
1da177e4 LT |
1037 | .procname = "page-cluster", |
1038 | .data = &page_cluster, | |
1039 | .maxlen = sizeof(int), | |
1040 | .mode = 0644, | |
cb16e95f PH |
1041 | .proc_handler = proc_dointvec_minmax, |
1042 | .extra1 = &zero, | |
1da177e4 LT |
1043 | }, |
1044 | { | |
1da177e4 LT |
1045 | .procname = "dirty_background_ratio", |
1046 | .data = &dirty_background_ratio, | |
1047 | .maxlen = sizeof(dirty_background_ratio), | |
1048 | .mode = 0644, | |
6d456111 | 1049 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1050 | .extra1 = &zero, |
1051 | .extra2 = &one_hundred, | |
1052 | }, | |
2da02997 | 1053 | { |
2da02997 DR |
1054 | .procname = "dirty_background_bytes", |
1055 | .data = &dirty_background_bytes, | |
1056 | .maxlen = sizeof(dirty_background_bytes), | |
1057 | .mode = 0644, | |
6d456111 | 1058 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1059 | .extra1 = &one_ul, |
2da02997 | 1060 | }, |
1da177e4 | 1061 | { |
1da177e4 LT |
1062 | .procname = "dirty_ratio", |
1063 | .data = &vm_dirty_ratio, | |
1064 | .maxlen = sizeof(vm_dirty_ratio), | |
1065 | .mode = 0644, | |
6d456111 | 1066 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1067 | .extra1 = &zero, |
1068 | .extra2 = &one_hundred, | |
1069 | }, | |
2da02997 | 1070 | { |
2da02997 DR |
1071 | .procname = "dirty_bytes", |
1072 | .data = &vm_dirty_bytes, | |
1073 | .maxlen = sizeof(vm_dirty_bytes), | |
1074 | .mode = 0644, | |
6d456111 | 1075 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1076 | .extra1 = &dirty_bytes_min, |
2da02997 | 1077 | }, |
1da177e4 | 1078 | { |
1da177e4 | 1079 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1080 | .data = &dirty_writeback_interval, |
1081 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1082 | .mode = 0644, |
6d456111 | 1083 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1084 | }, |
1085 | { | |
1da177e4 | 1086 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1087 | .data = &dirty_expire_interval, |
1088 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1089 | .mode = 0644, |
cb16e95f PH |
1090 | .proc_handler = proc_dointvec_minmax, |
1091 | .extra1 = &zero, | |
1da177e4 LT |
1092 | }, |
1093 | { | |
1da177e4 LT |
1094 | .procname = "nr_pdflush_threads", |
1095 | .data = &nr_pdflush_threads, | |
1096 | .maxlen = sizeof nr_pdflush_threads, | |
1097 | .mode = 0444 /* read-only*/, | |
6d456111 | 1098 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1099 | }, |
1100 | { | |
1da177e4 LT |
1101 | .procname = "swappiness", |
1102 | .data = &vm_swappiness, | |
1103 | .maxlen = sizeof(vm_swappiness), | |
1104 | .mode = 0644, | |
6d456111 | 1105 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1106 | .extra1 = &zero, |
1107 | .extra2 = &one_hundred, | |
1108 | }, | |
1109 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1110 | { |
1da177e4 | 1111 | .procname = "nr_hugepages", |
e5ff2159 | 1112 | .data = NULL, |
1da177e4 LT |
1113 | .maxlen = sizeof(unsigned long), |
1114 | .mode = 0644, | |
6d456111 | 1115 | .proc_handler = hugetlb_sysctl_handler, |
1da177e4 LT |
1116 | .extra1 = (void *)&hugetlb_zero, |
1117 | .extra2 = (void *)&hugetlb_infinity, | |
06808b08 LS |
1118 | }, |
1119 | #ifdef CONFIG_NUMA | |
1120 | { | |
1121 | .procname = "nr_hugepages_mempolicy", | |
1122 | .data = NULL, | |
1123 | .maxlen = sizeof(unsigned long), | |
1124 | .mode = 0644, | |
1125 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
1126 | .extra1 = (void *)&hugetlb_zero, | |
1127 | .extra2 = (void *)&hugetlb_infinity, | |
1128 | }, | |
1129 | #endif | |
1da177e4 | 1130 | { |
1da177e4 LT |
1131 | .procname = "hugetlb_shm_group", |
1132 | .data = &sysctl_hugetlb_shm_group, | |
1133 | .maxlen = sizeof(gid_t), | |
1134 | .mode = 0644, | |
6d456111 | 1135 | .proc_handler = proc_dointvec, |
1da177e4 | 1136 | }, |
396faf03 | 1137 | { |
396faf03 MG |
1138 | .procname = "hugepages_treat_as_movable", |
1139 | .data = &hugepages_treat_as_movable, | |
1140 | .maxlen = sizeof(int), | |
1141 | .mode = 0644, | |
6d456111 | 1142 | .proc_handler = hugetlb_treat_movable_handler, |
396faf03 | 1143 | }, |
d1c3fb1f | 1144 | { |
d1c3fb1f | 1145 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1146 | .data = NULL, |
1147 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1148 | .mode = 0644, |
6d456111 | 1149 | .proc_handler = hugetlb_overcommit_handler, |
e5ff2159 AK |
1150 | .extra1 = (void *)&hugetlb_zero, |
1151 | .extra2 = (void *)&hugetlb_infinity, | |
d1c3fb1f | 1152 | }, |
1da177e4 LT |
1153 | #endif |
1154 | { | |
1da177e4 LT |
1155 | .procname = "lowmem_reserve_ratio", |
1156 | .data = &sysctl_lowmem_reserve_ratio, | |
1157 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1158 | .mode = 0644, | |
6d456111 | 1159 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1160 | }, |
9d0243bc | 1161 | { |
9d0243bc AM |
1162 | .procname = "drop_caches", |
1163 | .data = &sysctl_drop_caches, | |
1164 | .maxlen = sizeof(int), | |
1165 | .mode = 0644, | |
1166 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f PH |
1167 | .extra1 = &one, |
1168 | .extra2 = &three, | |
9d0243bc | 1169 | }, |
76ab0f53 MG |
1170 | #ifdef CONFIG_COMPACTION |
1171 | { | |
1172 | .procname = "compact_memory", | |
1173 | .data = &sysctl_compact_memory, | |
1174 | .maxlen = sizeof(int), | |
1175 | .mode = 0200, | |
1176 | .proc_handler = sysctl_compaction_handler, | |
1177 | }, | |
5e771905 MG |
1178 | { |
1179 | .procname = "extfrag_threshold", | |
1180 | .data = &sysctl_extfrag_threshold, | |
1181 | .maxlen = sizeof(int), | |
1182 | .mode = 0644, | |
1183 | .proc_handler = sysctl_extfrag_handler, | |
1184 | .extra1 = &min_extfrag_threshold, | |
1185 | .extra2 = &max_extfrag_threshold, | |
1186 | }, | |
1187 | ||
76ab0f53 | 1188 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1189 | { |
1da177e4 LT |
1190 | .procname = "min_free_kbytes", |
1191 | .data = &min_free_kbytes, | |
1192 | .maxlen = sizeof(min_free_kbytes), | |
1193 | .mode = 0644, | |
6d456111 | 1194 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1195 | .extra1 = &zero, |
1196 | }, | |
8ad4b1fb | 1197 | { |
8ad4b1fb RS |
1198 | .procname = "percpu_pagelist_fraction", |
1199 | .data = &percpu_pagelist_fraction, | |
1200 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1201 | .mode = 0644, | |
6d456111 | 1202 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
8ad4b1fb RS |
1203 | .extra1 = &min_percpu_pagelist_fract, |
1204 | }, | |
1da177e4 LT |
1205 | #ifdef CONFIG_MMU |
1206 | { | |
1da177e4 LT |
1207 | .procname = "max_map_count", |
1208 | .data = &sysctl_max_map_count, | |
1209 | .maxlen = sizeof(sysctl_max_map_count), | |
1210 | .mode = 0644, | |
3e26120c | 1211 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1212 | .extra1 = &zero, |
1da177e4 | 1213 | }, |
dd8632a1 PM |
1214 | #else |
1215 | { | |
dd8632a1 PM |
1216 | .procname = "nr_trim_pages", |
1217 | .data = &sysctl_nr_trim_pages, | |
1218 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1219 | .mode = 0644, | |
6d456111 | 1220 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1221 | .extra1 = &zero, |
1222 | }, | |
1da177e4 LT |
1223 | #endif |
1224 | { | |
1da177e4 LT |
1225 | .procname = "laptop_mode", |
1226 | .data = &laptop_mode, | |
1227 | .maxlen = sizeof(laptop_mode), | |
1228 | .mode = 0644, | |
6d456111 | 1229 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1230 | }, |
1231 | { | |
1da177e4 LT |
1232 | .procname = "block_dump", |
1233 | .data = &block_dump, | |
1234 | .maxlen = sizeof(block_dump), | |
1235 | .mode = 0644, | |
6d456111 | 1236 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1237 | .extra1 = &zero, |
1238 | }, | |
1239 | { | |
1da177e4 LT |
1240 | .procname = "vfs_cache_pressure", |
1241 | .data = &sysctl_vfs_cache_pressure, | |
1242 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1243 | .mode = 0644, | |
6d456111 | 1244 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1245 | .extra1 = &zero, |
1246 | }, | |
1247 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1248 | { | |
1da177e4 LT |
1249 | .procname = "legacy_va_layout", |
1250 | .data = &sysctl_legacy_va_layout, | |
1251 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1252 | .mode = 0644, | |
6d456111 | 1253 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1254 | .extra1 = &zero, |
1255 | }, | |
1256 | #endif | |
1743660b CL |
1257 | #ifdef CONFIG_NUMA |
1258 | { | |
1743660b CL |
1259 | .procname = "zone_reclaim_mode", |
1260 | .data = &zone_reclaim_mode, | |
1261 | .maxlen = sizeof(zone_reclaim_mode), | |
1262 | .mode = 0644, | |
6d456111 | 1263 | .proc_handler = proc_dointvec, |
c84db23c | 1264 | .extra1 = &zero, |
1743660b | 1265 | }, |
9614634f | 1266 | { |
9614634f CL |
1267 | .procname = "min_unmapped_ratio", |
1268 | .data = &sysctl_min_unmapped_ratio, | |
1269 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1270 | .mode = 0644, | |
6d456111 | 1271 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1272 | .extra1 = &zero, |
1273 | .extra2 = &one_hundred, | |
1274 | }, | |
0ff38490 | 1275 | { |
0ff38490 CL |
1276 | .procname = "min_slab_ratio", |
1277 | .data = &sysctl_min_slab_ratio, | |
1278 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1279 | .mode = 0644, | |
6d456111 | 1280 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1281 | .extra1 = &zero, |
1282 | .extra2 = &one_hundred, | |
1283 | }, | |
e6e5494c | 1284 | #endif |
77461ab3 CL |
1285 | #ifdef CONFIG_SMP |
1286 | { | |
77461ab3 CL |
1287 | .procname = "stat_interval", |
1288 | .data = &sysctl_stat_interval, | |
1289 | .maxlen = sizeof(sysctl_stat_interval), | |
1290 | .mode = 0644, | |
6d456111 | 1291 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1292 | }, |
1293 | #endif | |
6e141546 | 1294 | #ifdef CONFIG_MMU |
ed032189 | 1295 | { |
ed032189 | 1296 | .procname = "mmap_min_addr", |
788084ab EP |
1297 | .data = &dac_mmap_min_addr, |
1298 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1299 | .mode = 0644, |
6d456111 | 1300 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1301 | }, |
6e141546 | 1302 | #endif |
f0c0b2b8 KH |
1303 | #ifdef CONFIG_NUMA |
1304 | { | |
f0c0b2b8 KH |
1305 | .procname = "numa_zonelist_order", |
1306 | .data = &numa_zonelist_order, | |
1307 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1308 | .mode = 0644, | |
6d456111 | 1309 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1310 | }, |
1311 | #endif | |
2b8232ce | 1312 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1313 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1314 | { |
e6e5494c IM |
1315 | .procname = "vdso_enabled", |
1316 | .data = &vdso_enabled, | |
1317 | .maxlen = sizeof(vdso_enabled), | |
1318 | .mode = 0644, | |
6d456111 | 1319 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1320 | .extra1 = &zero, |
1321 | }, | |
1da177e4 | 1322 | #endif |
195cf453 BG |
1323 | #ifdef CONFIG_HIGHMEM |
1324 | { | |
195cf453 BG |
1325 | .procname = "highmem_is_dirtyable", |
1326 | .data = &vm_highmem_is_dirtyable, | |
1327 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1328 | .mode = 0644, | |
6d456111 | 1329 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1330 | .extra1 = &zero, |
1331 | .extra2 = &one, | |
1332 | }, | |
1333 | #endif | |
4be6f6bb | 1334 | { |
4be6f6bb PZ |
1335 | .procname = "scan_unevictable_pages", |
1336 | .data = &scan_unevictable_pages, | |
1337 | .maxlen = sizeof(scan_unevictable_pages), | |
1338 | .mode = 0644, | |
6d456111 | 1339 | .proc_handler = scan_unevictable_handler, |
4be6f6bb | 1340 | }, |
6a46079c AK |
1341 | #ifdef CONFIG_MEMORY_FAILURE |
1342 | { | |
6a46079c AK |
1343 | .procname = "memory_failure_early_kill", |
1344 | .data = &sysctl_memory_failure_early_kill, | |
1345 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1346 | .mode = 0644, | |
6d456111 | 1347 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1348 | .extra1 = &zero, |
1349 | .extra2 = &one, | |
1350 | }, | |
1351 | { | |
6a46079c AK |
1352 | .procname = "memory_failure_recovery", |
1353 | .data = &sysctl_memory_failure_recovery, | |
1354 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1355 | .mode = 0644, | |
6d456111 | 1356 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1357 | .extra1 = &zero, |
1358 | .extra2 = &one, | |
1359 | }, | |
1360 | #endif | |
6fce56ec | 1361 | { } |
1da177e4 LT |
1362 | }; |
1363 | ||
2abc26fc | 1364 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1365 | static struct ctl_table binfmt_misc_table[] = { |
6fce56ec | 1366 | { } |
2abc26fc EB |
1367 | }; |
1368 | #endif | |
1369 | ||
d8217f07 | 1370 | static struct ctl_table fs_table[] = { |
1da177e4 | 1371 | { |
1da177e4 LT |
1372 | .procname = "inode-nr", |
1373 | .data = &inodes_stat, | |
1374 | .maxlen = 2*sizeof(int), | |
1375 | .mode = 0444, | |
cffbc8aa | 1376 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1377 | }, |
1378 | { | |
1da177e4 LT |
1379 | .procname = "inode-state", |
1380 | .data = &inodes_stat, | |
1381 | .maxlen = 7*sizeof(int), | |
1382 | .mode = 0444, | |
cffbc8aa | 1383 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1384 | }, |
1385 | { | |
1da177e4 LT |
1386 | .procname = "file-nr", |
1387 | .data = &files_stat, | |
518de9b3 | 1388 | .maxlen = sizeof(files_stat), |
1da177e4 | 1389 | .mode = 0444, |
6d456111 | 1390 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1391 | }, |
1392 | { | |
1da177e4 LT |
1393 | .procname = "file-max", |
1394 | .data = &files_stat.max_files, | |
518de9b3 | 1395 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1396 | .mode = 0644, |
518de9b3 | 1397 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1398 | }, |
9cfe015a | 1399 | { |
9cfe015a ED |
1400 | .procname = "nr_open", |
1401 | .data = &sysctl_nr_open, | |
1402 | .maxlen = sizeof(int), | |
1403 | .mode = 0644, | |
6d456111 | 1404 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1405 | .extra1 = &sysctl_nr_open_min, |
1406 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1407 | }, |
1da177e4 | 1408 | { |
1da177e4 LT |
1409 | .procname = "dentry-state", |
1410 | .data = &dentry_stat, | |
1411 | .maxlen = 6*sizeof(int), | |
1412 | .mode = 0444, | |
312d3ca8 | 1413 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1414 | }, |
1415 | { | |
1da177e4 LT |
1416 | .procname = "overflowuid", |
1417 | .data = &fs_overflowuid, | |
1418 | .maxlen = sizeof(int), | |
1419 | .mode = 0644, | |
6d456111 | 1420 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1421 | .extra1 = &minolduid, |
1422 | .extra2 = &maxolduid, | |
1423 | }, | |
1424 | { | |
1da177e4 LT |
1425 | .procname = "overflowgid", |
1426 | .data = &fs_overflowgid, | |
1427 | .maxlen = sizeof(int), | |
1428 | .mode = 0644, | |
6d456111 | 1429 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1430 | .extra1 = &minolduid, |
1431 | .extra2 = &maxolduid, | |
1432 | }, | |
bfcd17a6 | 1433 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1434 | { |
1da177e4 LT |
1435 | .procname = "leases-enable", |
1436 | .data = &leases_enable, | |
1437 | .maxlen = sizeof(int), | |
1438 | .mode = 0644, | |
6d456111 | 1439 | .proc_handler = proc_dointvec, |
1da177e4 | 1440 | }, |
bfcd17a6 | 1441 | #endif |
1da177e4 LT |
1442 | #ifdef CONFIG_DNOTIFY |
1443 | { | |
1da177e4 LT |
1444 | .procname = "dir-notify-enable", |
1445 | .data = &dir_notify_enable, | |
1446 | .maxlen = sizeof(int), | |
1447 | .mode = 0644, | |
6d456111 | 1448 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1449 | }, |
1450 | #endif | |
1451 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1452 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1453 | { |
1da177e4 LT |
1454 | .procname = "lease-break-time", |
1455 | .data = &lease_break_time, | |
1456 | .maxlen = sizeof(int), | |
1457 | .mode = 0644, | |
6d456111 | 1458 | .proc_handler = proc_dointvec, |
1da177e4 | 1459 | }, |
bfcd17a6 | 1460 | #endif |
ebf3f09c | 1461 | #ifdef CONFIG_AIO |
1da177e4 | 1462 | { |
1da177e4 LT |
1463 | .procname = "aio-nr", |
1464 | .data = &aio_nr, | |
1465 | .maxlen = sizeof(aio_nr), | |
1466 | .mode = 0444, | |
6d456111 | 1467 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1468 | }, |
1469 | { | |
1da177e4 LT |
1470 | .procname = "aio-max-nr", |
1471 | .data = &aio_max_nr, | |
1472 | .maxlen = sizeof(aio_max_nr), | |
1473 | .mode = 0644, | |
6d456111 | 1474 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1475 | }, |
ebf3f09c | 1476 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1477 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1478 | { |
0399cb08 RL |
1479 | .procname = "inotify", |
1480 | .mode = 0555, | |
1481 | .child = inotify_table, | |
1482 | }, | |
1483 | #endif | |
7ef9964e DL |
1484 | #ifdef CONFIG_EPOLL |
1485 | { | |
1486 | .procname = "epoll", | |
1487 | .mode = 0555, | |
1488 | .child = epoll_table, | |
1489 | }, | |
1490 | #endif | |
1da177e4 | 1491 | #endif |
d6e71144 | 1492 | { |
d6e71144 AC |
1493 | .procname = "suid_dumpable", |
1494 | .data = &suid_dumpable, | |
1495 | .maxlen = sizeof(int), | |
1496 | .mode = 0644, | |
6d456111 | 1497 | .proc_handler = proc_dointvec_minmax, |
8e654fba MW |
1498 | .extra1 = &zero, |
1499 | .extra2 = &two, | |
d6e71144 | 1500 | }, |
2abc26fc EB |
1501 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1502 | { | |
2abc26fc EB |
1503 | .procname = "binfmt_misc", |
1504 | .mode = 0555, | |
1505 | .child = binfmt_misc_table, | |
1506 | }, | |
1507 | #endif | |
b492e95b | 1508 | { |
ff9da691 JA |
1509 | .procname = "pipe-max-size", |
1510 | .data = &pipe_max_size, | |
b492e95b JA |
1511 | .maxlen = sizeof(int), |
1512 | .mode = 0644, | |
ff9da691 JA |
1513 | .proc_handler = &pipe_proc_fn, |
1514 | .extra1 = &pipe_min_size, | |
b492e95b | 1515 | }, |
6fce56ec | 1516 | { } |
1da177e4 LT |
1517 | }; |
1518 | ||
d8217f07 | 1519 | static struct ctl_table debug_table[] = { |
ab3c68ee | 1520 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || \ |
571d76ac | 1521 | defined(CONFIG_S390) || defined(CONFIG_TILE) |
abd4f750 | 1522 | { |
abd4f750 MAS |
1523 | .procname = "exception-trace", |
1524 | .data = &show_unhandled_signals, | |
1525 | .maxlen = sizeof(int), | |
1526 | .mode = 0644, | |
1527 | .proc_handler = proc_dointvec | |
1528 | }, | |
b2be84df MH |
1529 | #endif |
1530 | #if defined(CONFIG_OPTPROBES) | |
1531 | { | |
1532 | .procname = "kprobes-optimization", | |
1533 | .data = &sysctl_kprobes_optimization, | |
1534 | .maxlen = sizeof(int), | |
1535 | .mode = 0644, | |
1536 | .proc_handler = proc_kprobes_optimization_handler, | |
1537 | .extra1 = &zero, | |
1538 | .extra2 = &one, | |
1539 | }, | |
abd4f750 | 1540 | #endif |
6fce56ec | 1541 | { } |
1da177e4 LT |
1542 | }; |
1543 | ||
d8217f07 | 1544 | static struct ctl_table dev_table[] = { |
6fce56ec | 1545 | { } |
0eeca283 | 1546 | }; |
1da177e4 | 1547 | |
de4e83bd | 1548 | int __init sysctl_init(void) |
d912b0cc | 1549 | { |
de4e83bd | 1550 | register_sysctl_table(sysctl_base_table); |
d912b0cc EB |
1551 | return 0; |
1552 | } | |
1553 | ||
b89a8171 EB |
1554 | #endif /* CONFIG_SYSCTL */ |
1555 | ||
1da177e4 LT |
1556 | /* |
1557 | * /proc/sys support | |
1558 | */ | |
1559 | ||
b89a8171 | 1560 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1561 | |
b1ba4ddd | 1562 | static int _proc_do_string(void* data, int maxlen, int write, |
8d65af78 | 1563 | void __user *buffer, |
b1ba4ddd | 1564 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1565 | { |
1566 | size_t len; | |
1567 | char __user *p; | |
1568 | char c; | |
8d060877 ON |
1569 | |
1570 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1571 | *lenp = 0; |
1572 | return 0; | |
1573 | } | |
8d060877 | 1574 | |
1da177e4 LT |
1575 | if (write) { |
1576 | len = 0; | |
1577 | p = buffer; | |
1578 | while (len < *lenp) { | |
1579 | if (get_user(c, p++)) | |
1580 | return -EFAULT; | |
1581 | if (c == 0 || c == '\n') | |
1582 | break; | |
1583 | len++; | |
1584 | } | |
f5dd3d6f SV |
1585 | if (len >= maxlen) |
1586 | len = maxlen-1; | |
1587 | if(copy_from_user(data, buffer, len)) | |
1da177e4 | 1588 | return -EFAULT; |
f5dd3d6f | 1589 | ((char *) data)[len] = 0; |
1da177e4 LT |
1590 | *ppos += *lenp; |
1591 | } else { | |
f5dd3d6f SV |
1592 | len = strlen(data); |
1593 | if (len > maxlen) | |
1594 | len = maxlen; | |
8d060877 ON |
1595 | |
1596 | if (*ppos > len) { | |
1597 | *lenp = 0; | |
1598 | return 0; | |
1599 | } | |
1600 | ||
1601 | data += *ppos; | |
1602 | len -= *ppos; | |
1603 | ||
1da177e4 LT |
1604 | if (len > *lenp) |
1605 | len = *lenp; | |
1606 | if (len) | |
f5dd3d6f | 1607 | if(copy_to_user(buffer, data, len)) |
1da177e4 LT |
1608 | return -EFAULT; |
1609 | if (len < *lenp) { | |
1610 | if(put_user('\n', ((char __user *) buffer) + len)) | |
1611 | return -EFAULT; | |
1612 | len++; | |
1613 | } | |
1614 | *lenp = len; | |
1615 | *ppos += len; | |
1616 | } | |
1617 | return 0; | |
1618 | } | |
1619 | ||
f5dd3d6f SV |
1620 | /** |
1621 | * proc_dostring - read a string sysctl | |
1622 | * @table: the sysctl table | |
1623 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
1624 | * @buffer: the user buffer |
1625 | * @lenp: the size of the user buffer | |
1626 | * @ppos: file position | |
1627 | * | |
1628 | * Reads/writes a string from/to the user buffer. If the kernel | |
1629 | * buffer provided is not large enough to hold the string, the | |
1630 | * string is truncated. The copied string is %NULL-terminated. | |
1631 | * If the string is being read by the user process, it is copied | |
1632 | * and a newline '\n' is added. It is truncated if the buffer is | |
1633 | * not large enough. | |
1634 | * | |
1635 | * Returns 0 on success. | |
1636 | */ | |
8d65af78 | 1637 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
1638 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1639 | { | |
8d65af78 | 1640 | return _proc_do_string(table->data, table->maxlen, write, |
f5dd3d6f SV |
1641 | buffer, lenp, ppos); |
1642 | } | |
1643 | ||
00b7c339 AW |
1644 | static size_t proc_skip_spaces(char **buf) |
1645 | { | |
1646 | size_t ret; | |
1647 | char *tmp = skip_spaces(*buf); | |
1648 | ret = tmp - *buf; | |
1649 | *buf = tmp; | |
1650 | return ret; | |
1651 | } | |
1652 | ||
9f977fb7 OP |
1653 | static void proc_skip_char(char **buf, size_t *size, const char v) |
1654 | { | |
1655 | while (*size) { | |
1656 | if (**buf != v) | |
1657 | break; | |
1658 | (*size)--; | |
1659 | (*buf)++; | |
1660 | } | |
1661 | } | |
1662 | ||
00b7c339 AW |
1663 | #define TMPBUFLEN 22 |
1664 | /** | |
0fc377bd | 1665 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 1666 | * |
0fc377bd RD |
1667 | * @buf: a kernel buffer |
1668 | * @size: size of the kernel buffer | |
1669 | * @val: this is where the number will be stored | |
1670 | * @neg: set to %TRUE if number is negative | |
1671 | * @perm_tr: a vector which contains the allowed trailers | |
1672 | * @perm_tr_len: size of the perm_tr vector | |
1673 | * @tr: pointer to store the trailer character | |
00b7c339 | 1674 | * |
0fc377bd RD |
1675 | * In case of success %0 is returned and @buf and @size are updated with |
1676 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
1677 | * character exists (size is non-zero after returning from this | |
1678 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
1679 | */ |
1680 | static int proc_get_long(char **buf, size_t *size, | |
1681 | unsigned long *val, bool *neg, | |
1682 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
1683 | { | |
1684 | int len; | |
1685 | char *p, tmp[TMPBUFLEN]; | |
1686 | ||
1687 | if (!*size) | |
1688 | return -EINVAL; | |
1689 | ||
1690 | len = *size; | |
1691 | if (len > TMPBUFLEN - 1) | |
1692 | len = TMPBUFLEN - 1; | |
1693 | ||
1694 | memcpy(tmp, *buf, len); | |
1695 | ||
1696 | tmp[len] = 0; | |
1697 | p = tmp; | |
1698 | if (*p == '-' && *size > 1) { | |
1699 | *neg = true; | |
1700 | p++; | |
1701 | } else | |
1702 | *neg = false; | |
1703 | if (!isdigit(*p)) | |
1704 | return -EINVAL; | |
1705 | ||
1706 | *val = simple_strtoul(p, &p, 0); | |
1707 | ||
1708 | len = p - tmp; | |
1709 | ||
1710 | /* We don't know if the next char is whitespace thus we may accept | |
1711 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
1712 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
1713 | if (len == TMPBUFLEN - 1) | |
1714 | return -EINVAL; | |
1715 | ||
1716 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
1717 | return -EINVAL; | |
1da177e4 | 1718 | |
00b7c339 AW |
1719 | if (tr && (len < *size)) |
1720 | *tr = *p; | |
1721 | ||
1722 | *buf += len; | |
1723 | *size -= len; | |
1724 | ||
1725 | return 0; | |
1726 | } | |
1727 | ||
1728 | /** | |
0fc377bd | 1729 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 1730 | * |
0fc377bd RD |
1731 | * @buf: the user buffer |
1732 | * @size: the size of the user buffer | |
1733 | * @val: the integer to be converted | |
1734 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 1735 | * |
0fc377bd RD |
1736 | * In case of success %0 is returned and @buf and @size are updated with |
1737 | * the amount of bytes written. | |
00b7c339 AW |
1738 | */ |
1739 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
1740 | bool neg) | |
1741 | { | |
1742 | int len; | |
1743 | char tmp[TMPBUFLEN], *p = tmp; | |
1744 | ||
1745 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
1746 | len = strlen(tmp); | |
1747 | if (len > *size) | |
1748 | len = *size; | |
1749 | if (copy_to_user(*buf, tmp, len)) | |
1750 | return -EFAULT; | |
1751 | *size -= len; | |
1752 | *buf += len; | |
1753 | return 0; | |
1754 | } | |
1755 | #undef TMPBUFLEN | |
1756 | ||
1757 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
1758 | { | |
1759 | if (*size) { | |
1760 | char __user **buffer = (char __user **)buf; | |
1761 | if (put_user(c, *buffer)) | |
1762 | return -EFAULT; | |
1763 | (*size)--, (*buffer)++; | |
1764 | *buf = *buffer; | |
1765 | } | |
1766 | return 0; | |
1767 | } | |
1da177e4 | 1768 | |
00b7c339 | 1769 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
1770 | int *valp, |
1771 | int write, void *data) | |
1772 | { | |
1773 | if (write) { | |
1774 | *valp = *negp ? -*lvalp : *lvalp; | |
1775 | } else { | |
1776 | int val = *valp; | |
1777 | if (val < 0) { | |
00b7c339 | 1778 | *negp = true; |
1da177e4 LT |
1779 | *lvalp = (unsigned long)-val; |
1780 | } else { | |
00b7c339 | 1781 | *negp = false; |
1da177e4 LT |
1782 | *lvalp = (unsigned long)val; |
1783 | } | |
1784 | } | |
1785 | return 0; | |
1786 | } | |
1787 | ||
00b7c339 AW |
1788 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
1789 | ||
d8217f07 | 1790 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 1791 | int write, void __user *buffer, |
fcfbd547 | 1792 | size_t *lenp, loff_t *ppos, |
00b7c339 | 1793 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
1794 | int write, void *data), |
1795 | void *data) | |
1796 | { | |
00b7c339 AW |
1797 | int *i, vleft, first = 1, err = 0; |
1798 | unsigned long page = 0; | |
1799 | size_t left; | |
1800 | char *kbuf; | |
1da177e4 | 1801 | |
00b7c339 | 1802 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
1803 | *lenp = 0; |
1804 | return 0; | |
1805 | } | |
1806 | ||
fcfbd547 | 1807 | i = (int *) tbl_data; |
1da177e4 LT |
1808 | vleft = table->maxlen / sizeof(*i); |
1809 | left = *lenp; | |
1810 | ||
1811 | if (!conv) | |
1812 | conv = do_proc_dointvec_conv; | |
1813 | ||
00b7c339 AW |
1814 | if (write) { |
1815 | if (left > PAGE_SIZE - 1) | |
1816 | left = PAGE_SIZE - 1; | |
1817 | page = __get_free_page(GFP_TEMPORARY); | |
1818 | kbuf = (char *) page; | |
1819 | if (!kbuf) | |
1820 | return -ENOMEM; | |
1821 | if (copy_from_user(kbuf, buffer, left)) { | |
1822 | err = -EFAULT; | |
1823 | goto free; | |
1824 | } | |
1825 | kbuf[left] = 0; | |
1826 | } | |
1827 | ||
1da177e4 | 1828 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
1829 | unsigned long lval; |
1830 | bool neg; | |
1da177e4 | 1831 | |
00b7c339 AW |
1832 | if (write) { |
1833 | left -= proc_skip_spaces(&kbuf); | |
1da177e4 | 1834 | |
563b0467 O |
1835 | if (!left) |
1836 | break; | |
00b7c339 AW |
1837 | err = proc_get_long(&kbuf, &left, &lval, &neg, |
1838 | proc_wspace_sep, | |
1839 | sizeof(proc_wspace_sep), NULL); | |
1840 | if (err) | |
1da177e4 | 1841 | break; |
00b7c339 AW |
1842 | if (conv(&neg, &lval, i, 1, data)) { |
1843 | err = -EINVAL; | |
1da177e4 | 1844 | break; |
00b7c339 | 1845 | } |
1da177e4 | 1846 | } else { |
00b7c339 AW |
1847 | if (conv(&neg, &lval, i, 0, data)) { |
1848 | err = -EINVAL; | |
1849 | break; | |
1850 | } | |
1da177e4 | 1851 | if (!first) |
00b7c339 AW |
1852 | err = proc_put_char(&buffer, &left, '\t'); |
1853 | if (err) | |
1854 | break; | |
1855 | err = proc_put_long(&buffer, &left, lval, neg); | |
1856 | if (err) | |
1da177e4 | 1857 | break; |
1da177e4 LT |
1858 | } |
1859 | } | |
1860 | ||
00b7c339 AW |
1861 | if (!write && !first && left && !err) |
1862 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 1863 | if (write && !err && left) |
00b7c339 AW |
1864 | left -= proc_skip_spaces(&kbuf); |
1865 | free: | |
1da177e4 | 1866 | if (write) { |
00b7c339 AW |
1867 | free_page(page); |
1868 | if (first) | |
1869 | return err ? : -EINVAL; | |
1da177e4 | 1870 | } |
1da177e4 LT |
1871 | *lenp -= left; |
1872 | *ppos += *lenp; | |
00b7c339 | 1873 | return err; |
1da177e4 LT |
1874 | } |
1875 | ||
8d65af78 | 1876 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 1877 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 1878 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
1879 | int write, void *data), |
1880 | void *data) | |
1881 | { | |
8d65af78 | 1882 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
1883 | buffer, lenp, ppos, conv, data); |
1884 | } | |
1885 | ||
1da177e4 LT |
1886 | /** |
1887 | * proc_dointvec - read a vector of integers | |
1888 | * @table: the sysctl table | |
1889 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
1890 | * @buffer: the user buffer |
1891 | * @lenp: the size of the user buffer | |
1892 | * @ppos: file position | |
1893 | * | |
1894 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
1895 | * values from/to the user buffer, treated as an ASCII string. | |
1896 | * | |
1897 | * Returns 0 on success. | |
1898 | */ | |
8d65af78 | 1899 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
1900 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1901 | { | |
8d65af78 | 1902 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
1903 | NULL,NULL); |
1904 | } | |
1905 | ||
34f5a398 | 1906 | /* |
25ddbb18 AK |
1907 | * Taint values can only be increased |
1908 | * This means we can safely use a temporary. | |
34f5a398 | 1909 | */ |
8d65af78 | 1910 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
1911 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1912 | { | |
25ddbb18 AK |
1913 | struct ctl_table t; |
1914 | unsigned long tmptaint = get_taint(); | |
1915 | int err; | |
34f5a398 | 1916 | |
91fcd412 | 1917 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
1918 | return -EPERM; |
1919 | ||
25ddbb18 AK |
1920 | t = *table; |
1921 | t.data = &tmptaint; | |
8d65af78 | 1922 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
1923 | if (err < 0) |
1924 | return err; | |
1925 | ||
1926 | if (write) { | |
1927 | /* | |
1928 | * Poor man's atomic or. Not worth adding a primitive | |
1929 | * to everyone's atomic.h for this | |
1930 | */ | |
1931 | int i; | |
1932 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
1933 | if ((tmptaint >> i) & 1) | |
1934 | add_taint(i); | |
1935 | } | |
1936 | } | |
1937 | ||
1938 | return err; | |
34f5a398 TT |
1939 | } |
1940 | ||
bfdc0b49 RW |
1941 | #ifdef CONFIG_PRINTK |
1942 | static int proc_dmesg_restrict(struct ctl_table *table, int write, | |
1943 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
1944 | { | |
1945 | if (write && !capable(CAP_SYS_ADMIN)) | |
1946 | return -EPERM; | |
1947 | ||
1948 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
1949 | } | |
1950 | #endif | |
1951 | ||
1da177e4 LT |
1952 | struct do_proc_dointvec_minmax_conv_param { |
1953 | int *min; | |
1954 | int *max; | |
1955 | }; | |
1956 | ||
00b7c339 AW |
1957 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
1958 | int *valp, | |
1da177e4 LT |
1959 | int write, void *data) |
1960 | { | |
1961 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
1962 | if (write) { | |
1963 | int val = *negp ? -*lvalp : *lvalp; | |
1964 | if ((param->min && *param->min > val) || | |
1965 | (param->max && *param->max < val)) | |
1966 | return -EINVAL; | |
1967 | *valp = val; | |
1968 | } else { | |
1969 | int val = *valp; | |
1970 | if (val < 0) { | |
00b7c339 | 1971 | *negp = true; |
1da177e4 LT |
1972 | *lvalp = (unsigned long)-val; |
1973 | } else { | |
00b7c339 | 1974 | *negp = false; |
1da177e4 LT |
1975 | *lvalp = (unsigned long)val; |
1976 | } | |
1977 | } | |
1978 | return 0; | |
1979 | } | |
1980 | ||
1981 | /** | |
1982 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
1983 | * @table: the sysctl table | |
1984 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
1985 | * @buffer: the user buffer |
1986 | * @lenp: the size of the user buffer | |
1987 | * @ppos: file position | |
1988 | * | |
1989 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
1990 | * values from/to the user buffer, treated as an ASCII string. | |
1991 | * | |
1992 | * This routine will ensure the values are within the range specified by | |
1993 | * table->extra1 (min) and table->extra2 (max). | |
1994 | * | |
1995 | * Returns 0 on success. | |
1996 | */ | |
8d65af78 | 1997 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
1998 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1999 | { | |
2000 | struct do_proc_dointvec_minmax_conv_param param = { | |
2001 | .min = (int *) table->extra1, | |
2002 | .max = (int *) table->extra2, | |
2003 | }; | |
8d65af78 | 2004 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2005 | do_proc_dointvec_minmax_conv, ¶m); |
2006 | } | |
2007 | ||
d8217f07 | 2008 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2009 | void __user *buffer, |
2010 | size_t *lenp, loff_t *ppos, | |
2011 | unsigned long convmul, | |
2012 | unsigned long convdiv) | |
2013 | { | |
00b7c339 AW |
2014 | unsigned long *i, *min, *max; |
2015 | int vleft, first = 1, err = 0; | |
2016 | unsigned long page = 0; | |
2017 | size_t left; | |
2018 | char *kbuf; | |
2019 | ||
2020 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2021 | *lenp = 0; |
2022 | return 0; | |
2023 | } | |
00b7c339 | 2024 | |
fcfbd547 | 2025 | i = (unsigned long *) data; |
1da177e4 LT |
2026 | min = (unsigned long *) table->extra1; |
2027 | max = (unsigned long *) table->extra2; | |
2028 | vleft = table->maxlen / sizeof(unsigned long); | |
2029 | left = *lenp; | |
00b7c339 AW |
2030 | |
2031 | if (write) { | |
2032 | if (left > PAGE_SIZE - 1) | |
2033 | left = PAGE_SIZE - 1; | |
2034 | page = __get_free_page(GFP_TEMPORARY); | |
2035 | kbuf = (char *) page; | |
2036 | if (!kbuf) | |
2037 | return -ENOMEM; | |
2038 | if (copy_from_user(kbuf, buffer, left)) { | |
2039 | err = -EFAULT; | |
2040 | goto free; | |
2041 | } | |
2042 | kbuf[left] = 0; | |
2043 | } | |
2044 | ||
27b3d80a | 2045 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2046 | unsigned long val; |
2047 | ||
1da177e4 | 2048 | if (write) { |
00b7c339 AW |
2049 | bool neg; |
2050 | ||
2051 | left -= proc_skip_spaces(&kbuf); | |
2052 | ||
2053 | err = proc_get_long(&kbuf, &left, &val, &neg, | |
2054 | proc_wspace_sep, | |
2055 | sizeof(proc_wspace_sep), NULL); | |
2056 | if (err) | |
1da177e4 LT |
2057 | break; |
2058 | if (neg) | |
1da177e4 LT |
2059 | continue; |
2060 | if ((min && val < *min) || (max && val > *max)) | |
2061 | continue; | |
2062 | *i = val; | |
2063 | } else { | |
00b7c339 | 2064 | val = convdiv * (*i) / convmul; |
1da177e4 | 2065 | if (!first) |
00b7c339 AW |
2066 | err = proc_put_char(&buffer, &left, '\t'); |
2067 | err = proc_put_long(&buffer, &left, val, false); | |
2068 | if (err) | |
2069 | break; | |
1da177e4 LT |
2070 | } |
2071 | } | |
2072 | ||
00b7c339 AW |
2073 | if (!write && !first && left && !err) |
2074 | err = proc_put_char(&buffer, &left, '\n'); | |
2075 | if (write && !err) | |
2076 | left -= proc_skip_spaces(&kbuf); | |
2077 | free: | |
1da177e4 | 2078 | if (write) { |
00b7c339 AW |
2079 | free_page(page); |
2080 | if (first) | |
2081 | return err ? : -EINVAL; | |
1da177e4 | 2082 | } |
1da177e4 LT |
2083 | *lenp -= left; |
2084 | *ppos += *lenp; | |
00b7c339 | 2085 | return err; |
1da177e4 LT |
2086 | } |
2087 | ||
d8217f07 | 2088 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2089 | void __user *buffer, |
2090 | size_t *lenp, loff_t *ppos, | |
2091 | unsigned long convmul, | |
2092 | unsigned long convdiv) | |
2093 | { | |
2094 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2095 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2096 | } |
2097 | ||
1da177e4 LT |
2098 | /** |
2099 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2100 | * @table: the sysctl table | |
2101 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2102 | * @buffer: the user buffer |
2103 | * @lenp: the size of the user buffer | |
2104 | * @ppos: file position | |
2105 | * | |
2106 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2107 | * values from/to the user buffer, treated as an ASCII string. | |
2108 | * | |
2109 | * This routine will ensure the values are within the range specified by | |
2110 | * table->extra1 (min) and table->extra2 (max). | |
2111 | * | |
2112 | * Returns 0 on success. | |
2113 | */ | |
8d65af78 | 2114 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2115 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2116 | { | |
8d65af78 | 2117 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2118 | } |
2119 | ||
2120 | /** | |
2121 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2122 | * @table: the sysctl table | |
2123 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2124 | * @buffer: the user buffer |
2125 | * @lenp: the size of the user buffer | |
2126 | * @ppos: file position | |
2127 | * | |
2128 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2129 | * values from/to the user buffer, treated as an ASCII string. The values | |
2130 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2131 | * | |
2132 | * This routine will ensure the values are within the range specified by | |
2133 | * table->extra1 (min) and table->extra2 (max). | |
2134 | * | |
2135 | * Returns 0 on success. | |
2136 | */ | |
d8217f07 | 2137 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2138 | void __user *buffer, |
2139 | size_t *lenp, loff_t *ppos) | |
2140 | { | |
8d65af78 | 2141 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2142 | lenp, ppos, HZ, 1000l); |
2143 | } | |
2144 | ||
2145 | ||
00b7c339 | 2146 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2147 | int *valp, |
2148 | int write, void *data) | |
2149 | { | |
2150 | if (write) { | |
cba9f33d BS |
2151 | if (*lvalp > LONG_MAX / HZ) |
2152 | return 1; | |
1da177e4 LT |
2153 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2154 | } else { | |
2155 | int val = *valp; | |
2156 | unsigned long lval; | |
2157 | if (val < 0) { | |
00b7c339 | 2158 | *negp = true; |
1da177e4 LT |
2159 | lval = (unsigned long)-val; |
2160 | } else { | |
00b7c339 | 2161 | *negp = false; |
1da177e4 LT |
2162 | lval = (unsigned long)val; |
2163 | } | |
2164 | *lvalp = lval / HZ; | |
2165 | } | |
2166 | return 0; | |
2167 | } | |
2168 | ||
00b7c339 | 2169 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2170 | int *valp, |
2171 | int write, void *data) | |
2172 | { | |
2173 | if (write) { | |
cba9f33d BS |
2174 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2175 | return 1; | |
1da177e4 LT |
2176 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2177 | } else { | |
2178 | int val = *valp; | |
2179 | unsigned long lval; | |
2180 | if (val < 0) { | |
00b7c339 | 2181 | *negp = true; |
1da177e4 LT |
2182 | lval = (unsigned long)-val; |
2183 | } else { | |
00b7c339 | 2184 | *negp = false; |
1da177e4 LT |
2185 | lval = (unsigned long)val; |
2186 | } | |
2187 | *lvalp = jiffies_to_clock_t(lval); | |
2188 | } | |
2189 | return 0; | |
2190 | } | |
2191 | ||
00b7c339 | 2192 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2193 | int *valp, |
2194 | int write, void *data) | |
2195 | { | |
2196 | if (write) { | |
2197 | *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); | |
2198 | } else { | |
2199 | int val = *valp; | |
2200 | unsigned long lval; | |
2201 | if (val < 0) { | |
00b7c339 | 2202 | *negp = true; |
1da177e4 LT |
2203 | lval = (unsigned long)-val; |
2204 | } else { | |
00b7c339 | 2205 | *negp = false; |
1da177e4 LT |
2206 | lval = (unsigned long)val; |
2207 | } | |
2208 | *lvalp = jiffies_to_msecs(lval); | |
2209 | } | |
2210 | return 0; | |
2211 | } | |
2212 | ||
2213 | /** | |
2214 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2215 | * @table: the sysctl table | |
2216 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2217 | * @buffer: the user buffer |
2218 | * @lenp: the size of the user buffer | |
2219 | * @ppos: file position | |
2220 | * | |
2221 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2222 | * values from/to the user buffer, treated as an ASCII string. | |
2223 | * The values read are assumed to be in seconds, and are converted into | |
2224 | * jiffies. | |
2225 | * | |
2226 | * Returns 0 on success. | |
2227 | */ | |
8d65af78 | 2228 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2229 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2230 | { | |
8d65af78 | 2231 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2232 | do_proc_dointvec_jiffies_conv,NULL); |
2233 | } | |
2234 | ||
2235 | /** | |
2236 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2237 | * @table: the sysctl table | |
2238 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2239 | * @buffer: the user buffer |
2240 | * @lenp: the size of the user buffer | |
1e5d5331 | 2241 | * @ppos: pointer to the file position |
1da177e4 LT |
2242 | * |
2243 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2244 | * values from/to the user buffer, treated as an ASCII string. | |
2245 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2246 | * are converted into jiffies. | |
2247 | * | |
2248 | * Returns 0 on success. | |
2249 | */ | |
8d65af78 | 2250 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2251 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2252 | { | |
8d65af78 | 2253 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2254 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2255 | } | |
2256 | ||
2257 | /** | |
2258 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2259 | * @table: the sysctl table | |
2260 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2261 | * @buffer: the user buffer |
2262 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2263 | * @ppos: file position |
2264 | * @ppos: the current position in the file | |
1da177e4 LT |
2265 | * |
2266 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2267 | * values from/to the user buffer, treated as an ASCII string. | |
2268 | * The values read are assumed to be in 1/1000 seconds, and | |
2269 | * are converted into jiffies. | |
2270 | * | |
2271 | * Returns 0 on success. | |
2272 | */ | |
8d65af78 | 2273 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2274 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2275 | { | |
8d65af78 | 2276 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2277 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2278 | } | |
2279 | ||
8d65af78 | 2280 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2281 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2282 | { | |
2283 | struct pid *new_pid; | |
2284 | pid_t tmp; | |
2285 | int r; | |
2286 | ||
6c5f3e7b | 2287 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2288 | |
8d65af78 | 2289 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2290 | lenp, ppos, NULL, NULL); |
2291 | if (r || !write) | |
2292 | return r; | |
2293 | ||
2294 | new_pid = find_get_pid(tmp); | |
2295 | if (!new_pid) | |
2296 | return -ESRCH; | |
2297 | ||
2298 | put_pid(xchg(&cad_pid, new_pid)); | |
2299 | return 0; | |
2300 | } | |
2301 | ||
9f977fb7 OP |
2302 | /** |
2303 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2304 | * @table: the sysctl table | |
2305 | * @write: %TRUE if this is a write to the sysctl file | |
2306 | * @buffer: the user buffer | |
2307 | * @lenp: the size of the user buffer | |
2308 | * @ppos: file position | |
2309 | * | |
2310 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2311 | * in table->maxlen. | |
2312 | * | |
2313 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2314 | * large bitmaps may be represented in a compact manner. Writing into | |
2315 | * the file will clear the bitmap then update it with the given input. | |
2316 | * | |
2317 | * Returns 0 on success. | |
2318 | */ | |
2319 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2320 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2321 | { | |
2322 | int err = 0; | |
2323 | bool first = 1; | |
2324 | size_t left = *lenp; | |
2325 | unsigned long bitmap_len = table->maxlen; | |
2326 | unsigned long *bitmap = (unsigned long *) table->data; | |
2327 | unsigned long *tmp_bitmap = NULL; | |
2328 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2329 | ||
2330 | if (!bitmap_len || !left || (*ppos && !write)) { | |
2331 | *lenp = 0; | |
2332 | return 0; | |
2333 | } | |
2334 | ||
2335 | if (write) { | |
2336 | unsigned long page = 0; | |
2337 | char *kbuf; | |
2338 | ||
2339 | if (left > PAGE_SIZE - 1) | |
2340 | left = PAGE_SIZE - 1; | |
2341 | ||
2342 | page = __get_free_page(GFP_TEMPORARY); | |
2343 | kbuf = (char *) page; | |
2344 | if (!kbuf) | |
2345 | return -ENOMEM; | |
2346 | if (copy_from_user(kbuf, buffer, left)) { | |
2347 | free_page(page); | |
2348 | return -EFAULT; | |
2349 | } | |
2350 | kbuf[left] = 0; | |
2351 | ||
2352 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2353 | GFP_KERNEL); | |
2354 | if (!tmp_bitmap) { | |
2355 | free_page(page); | |
2356 | return -ENOMEM; | |
2357 | } | |
2358 | proc_skip_char(&kbuf, &left, '\n'); | |
2359 | while (!err && left) { | |
2360 | unsigned long val_a, val_b; | |
2361 | bool neg; | |
2362 | ||
2363 | err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a, | |
2364 | sizeof(tr_a), &c); | |
2365 | if (err) | |
2366 | break; | |
2367 | if (val_a >= bitmap_len || neg) { | |
2368 | err = -EINVAL; | |
2369 | break; | |
2370 | } | |
2371 | ||
2372 | val_b = val_a; | |
2373 | if (left) { | |
2374 | kbuf++; | |
2375 | left--; | |
2376 | } | |
2377 | ||
2378 | if (c == '-') { | |
2379 | err = proc_get_long(&kbuf, &left, &val_b, | |
2380 | &neg, tr_b, sizeof(tr_b), | |
2381 | &c); | |
2382 | if (err) | |
2383 | break; | |
2384 | if (val_b >= bitmap_len || neg || | |
2385 | val_a > val_b) { | |
2386 | err = -EINVAL; | |
2387 | break; | |
2388 | } | |
2389 | if (left) { | |
2390 | kbuf++; | |
2391 | left--; | |
2392 | } | |
2393 | } | |
2394 | ||
2395 | while (val_a <= val_b) | |
2396 | set_bit(val_a++, tmp_bitmap); | |
2397 | ||
2398 | first = 0; | |
2399 | proc_skip_char(&kbuf, &left, '\n'); | |
2400 | } | |
2401 | free_page(page); | |
2402 | } else { | |
2403 | unsigned long bit_a, bit_b = 0; | |
2404 | ||
2405 | while (left) { | |
2406 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
2407 | if (bit_a >= bitmap_len) | |
2408 | break; | |
2409 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
2410 | bit_a + 1) - 1; | |
2411 | ||
2412 | if (!first) { | |
2413 | err = proc_put_char(&buffer, &left, ','); | |
2414 | if (err) | |
2415 | break; | |
2416 | } | |
2417 | err = proc_put_long(&buffer, &left, bit_a, false); | |
2418 | if (err) | |
2419 | break; | |
2420 | if (bit_a != bit_b) { | |
2421 | err = proc_put_char(&buffer, &left, '-'); | |
2422 | if (err) | |
2423 | break; | |
2424 | err = proc_put_long(&buffer, &left, bit_b, false); | |
2425 | if (err) | |
2426 | break; | |
2427 | } | |
2428 | ||
2429 | first = 0; bit_b++; | |
2430 | } | |
2431 | if (!err) | |
2432 | err = proc_put_char(&buffer, &left, '\n'); | |
2433 | } | |
2434 | ||
2435 | if (!err) { | |
2436 | if (write) { | |
2437 | if (*ppos) | |
2438 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
2439 | else | |
2440 | memcpy(bitmap, tmp_bitmap, | |
2441 | BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long)); | |
2442 | } | |
2443 | kfree(tmp_bitmap); | |
2444 | *lenp -= left; | |
2445 | *ppos += *lenp; | |
2446 | return 0; | |
2447 | } else { | |
2448 | kfree(tmp_bitmap); | |
2449 | return err; | |
2450 | } | |
2451 | } | |
2452 | ||
55610500 | 2453 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2454 | |
8d65af78 | 2455 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2456 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2457 | { | |
2458 | return -ENOSYS; | |
2459 | } | |
2460 | ||
8d65af78 | 2461 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2462 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2463 | { |
2464 | return -ENOSYS; | |
2465 | } | |
2466 | ||
8d65af78 | 2467 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2468 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2469 | { | |
2470 | return -ENOSYS; | |
2471 | } | |
2472 | ||
8d65af78 | 2473 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2474 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2475 | { | |
2476 | return -ENOSYS; | |
2477 | } | |
2478 | ||
8d65af78 | 2479 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2480 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2481 | { | |
2482 | return -ENOSYS; | |
2483 | } | |
2484 | ||
8d65af78 | 2485 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2486 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2487 | { | |
2488 | return -ENOSYS; | |
2489 | } | |
2490 | ||
8d65af78 | 2491 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2492 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2493 | { | |
2494 | return -ENOSYS; | |
2495 | } | |
2496 | ||
d8217f07 | 2497 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2498 | void __user *buffer, |
2499 | size_t *lenp, loff_t *ppos) | |
2500 | { | |
2501 | return -ENOSYS; | |
2502 | } | |
2503 | ||
2504 | ||
55610500 | 2505 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2506 | |
1da177e4 LT |
2507 | /* |
2508 | * No sense putting this after each symbol definition, twice, | |
2509 | * exception granted :-) | |
2510 | */ | |
2511 | EXPORT_SYMBOL(proc_dointvec); | |
2512 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2513 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2514 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2515 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2516 | EXPORT_SYMBOL(proc_dostring); | |
2517 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2518 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |