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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 LT |
21 | #include <linux/module.h> |
22 | #include <linux/mm.h> | |
23 | #include <linux/swap.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/sysctl.h> | |
26 | #include <linux/proc_fs.h> | |
72c2d582 | 27 | #include <linux/security.h> |
1da177e4 | 28 | #include <linux/ctype.h> |
dfec072e | 29 | #include <linux/kmemcheck.h> |
62239ac2 | 30 | #include <linux/fs.h> |
1da177e4 LT |
31 | #include <linux/init.h> |
32 | #include <linux/kernel.h> | |
0296b228 | 33 | #include <linux/kobject.h> |
20380731 | 34 | #include <linux/net.h> |
1da177e4 LT |
35 | #include <linux/sysrq.h> |
36 | #include <linux/highuid.h> | |
37 | #include <linux/writeback.h> | |
3fff4c42 | 38 | #include <linux/ratelimit.h> |
1da177e4 | 39 | #include <linux/hugetlb.h> |
1da177e4 | 40 | #include <linux/initrd.h> |
0b77f5bf | 41 | #include <linux/key.h> |
1da177e4 LT |
42 | #include <linux/times.h> |
43 | #include <linux/limits.h> | |
44 | #include <linux/dcache.h> | |
45 | #include <linux/syscalls.h> | |
c748e134 | 46 | #include <linux/vmstat.h> |
c255d844 PM |
47 | #include <linux/nfs_fs.h> |
48 | #include <linux/acpi.h> | |
10a0a8d4 | 49 | #include <linux/reboot.h> |
b0fc494f | 50 | #include <linux/ftrace.h> |
12e22c5e | 51 | #include <linux/slow-work.h> |
cdd6c482 | 52 | #include <linux/perf_event.h> |
b2be84df | 53 | #include <linux/kprobes.h> |
1da177e4 LT |
54 | |
55 | #include <asm/uaccess.h> | |
56 | #include <asm/processor.h> | |
57 | ||
29cbc78b AK |
58 | #ifdef CONFIG_X86 |
59 | #include <asm/nmi.h> | |
0741f4d2 | 60 | #include <asm/stacktrace.h> |
6e7c4025 | 61 | #include <asm/io.h> |
29cbc78b AK |
62 | #endif |
63 | ||
7058cb02 | 64 | |
1da177e4 LT |
65 | #if defined(CONFIG_SYSCTL) |
66 | ||
67 | /* External variables not in a header file. */ | |
68 | extern int C_A_D; | |
45807a1d | 69 | extern int print_fatal_signals; |
1da177e4 LT |
70 | extern int sysctl_overcommit_memory; |
71 | extern int sysctl_overcommit_ratio; | |
fadd8fbd | 72 | extern int sysctl_panic_on_oom; |
fe071d7e | 73 | extern int sysctl_oom_kill_allocating_task; |
fef1bdd6 | 74 | extern int sysctl_oom_dump_tasks; |
1da177e4 | 75 | extern int max_threads; |
1da177e4 | 76 | extern int core_uses_pid; |
d6e71144 | 77 | extern int suid_dumpable; |
1da177e4 | 78 | extern char core_pattern[]; |
a293980c | 79 | extern unsigned int core_pipe_limit; |
1da177e4 LT |
80 | extern int pid_max; |
81 | extern int min_free_kbytes; | |
1da177e4 | 82 | extern int pid_max_min, pid_max_max; |
9d0243bc | 83 | extern int sysctl_drop_caches; |
8ad4b1fb | 84 | extern int percpu_pagelist_fraction; |
bebfa101 | 85 | extern int compat_log; |
9745512c | 86 | extern int latencytop_enabled; |
eceea0b3 | 87 | extern int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
88 | #ifndef CONFIG_MMU |
89 | extern int sysctl_nr_trim_pages; | |
90 | #endif | |
31a72bce PM |
91 | #ifdef CONFIG_RCU_TORTURE_TEST |
92 | extern int rcutorture_runnable; | |
93 | #endif /* #ifdef CONFIG_RCU_TORTURE_TEST */ | |
cb684b5b | 94 | #ifdef CONFIG_BLOCK |
5e605b64 | 95 | extern int blk_iopoll_enabled; |
cb684b5b | 96 | #endif |
1da177e4 | 97 | |
c4f3b63f | 98 | /* Constants used for minimum and maximum */ |
195cf453 | 99 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
c4f3b63f | 100 | static int sixty = 60; |
9383d967 | 101 | static int neg_one = -1; |
c4f3b63f RT |
102 | #endif |
103 | ||
c4f3b63f | 104 | static int zero; |
cd5f9a4c LT |
105 | static int __maybe_unused one = 1; |
106 | static int __maybe_unused two = 2; | |
fc3501d4 | 107 | static unsigned long one_ul = 1; |
c4f3b63f | 108 | static int one_hundred = 100; |
af91322e DY |
109 | #ifdef CONFIG_PRINTK |
110 | static int ten_thousand = 10000; | |
111 | #endif | |
c4f3b63f | 112 | |
9e4a5bda AR |
113 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
114 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
115 | ||
1da177e4 LT |
116 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
117 | static int maxolduid = 65535; | |
118 | static int minolduid; | |
8ad4b1fb | 119 | static int min_percpu_pagelist_fract = 8; |
1da177e4 LT |
120 | |
121 | static int ngroups_max = NGROUPS_MAX; | |
122 | ||
a1ef5adb | 123 | #ifdef CONFIG_MODULES |
1da177e4 | 124 | extern char modprobe_path[]; |
3d43321b | 125 | extern int modules_disabled; |
1da177e4 | 126 | #endif |
1da177e4 LT |
127 | #ifdef CONFIG_CHR_DEV_SG |
128 | extern int sg_big_buff; | |
129 | #endif | |
1da177e4 | 130 | |
72c57ed5 | 131 | #ifdef CONFIG_SPARC |
17f04fbb | 132 | #include <asm/system.h> |
1da177e4 LT |
133 | #endif |
134 | ||
0871420f DM |
135 | #ifdef CONFIG_SPARC64 |
136 | extern int sysctl_tsb_ratio; | |
137 | #endif | |
138 | ||
1da177e4 LT |
139 | #ifdef __hppa__ |
140 | extern int pwrsw_enabled; | |
141 | extern int unaligned_enabled; | |
142 | #endif | |
143 | ||
347a8dc3 | 144 | #ifdef CONFIG_S390 |
1da177e4 LT |
145 | #ifdef CONFIG_MATHEMU |
146 | extern int sysctl_ieee_emulation_warnings; | |
147 | #endif | |
148 | extern int sysctl_userprocess_debug; | |
951f22d5 | 149 | extern int spin_retry; |
1da177e4 LT |
150 | #endif |
151 | ||
1da177e4 LT |
152 | #ifdef CONFIG_BSD_PROCESS_ACCT |
153 | extern int acct_parm[]; | |
154 | #endif | |
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 | ||
3fff4c42 IM |
161 | extern struct ratelimit_state printk_ratelimit_state; |
162 | ||
23f78d4a IM |
163 | #ifdef CONFIG_RT_MUTEXES |
164 | extern int max_lock_depth; | |
165 | #endif | |
166 | ||
d6f8ff73 | 167 | #ifdef CONFIG_PROC_SYSCTL |
8d65af78 | 168 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 169 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 170 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 171 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 172 | #endif |
9ec52099 | 173 | |
d8217f07 | 174 | static struct ctl_table root_table[]; |
e51b6ba0 EB |
175 | static struct ctl_table_root sysctl_table_root; |
176 | static struct ctl_table_header root_table_header = { | |
b380b0d4 | 177 | .count = 1, |
e51b6ba0 | 178 | .ctl_table = root_table, |
73455092 | 179 | .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list), |
e51b6ba0 | 180 | .root = &sysctl_table_root, |
73455092 | 181 | .set = &sysctl_table_root.default_set, |
e51b6ba0 EB |
182 | }; |
183 | static struct ctl_table_root sysctl_table_root = { | |
184 | .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list), | |
73455092 | 185 | .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry), |
e51b6ba0 | 186 | }; |
1da177e4 | 187 | |
d8217f07 EB |
188 | static struct ctl_table kern_table[]; |
189 | static struct ctl_table vm_table[]; | |
190 | static struct ctl_table fs_table[]; | |
191 | static struct ctl_table debug_table[]; | |
192 | static struct ctl_table dev_table[]; | |
193 | extern struct ctl_table random_table[]; | |
2d9048e2 | 194 | #ifdef CONFIG_INOTIFY_USER |
d8217f07 | 195 | extern struct ctl_table inotify_table[]; |
0399cb08 | 196 | #endif |
7ef9964e DL |
197 | #ifdef CONFIG_EPOLL |
198 | extern struct ctl_table epoll_table[]; | |
199 | #endif | |
1da177e4 LT |
200 | |
201 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
202 | int sysctl_legacy_va_layout; | |
203 | #endif | |
204 | ||
f20786ff PZ |
205 | extern int prove_locking; |
206 | extern int lock_stat; | |
9bc9a6bd | 207 | |
1da177e4 LT |
208 | /* The default sysctl tables: */ |
209 | ||
d8217f07 | 210 | static struct ctl_table root_table[] = { |
1da177e4 | 211 | { |
1da177e4 LT |
212 | .procname = "kernel", |
213 | .mode = 0555, | |
214 | .child = kern_table, | |
215 | }, | |
216 | { | |
1da177e4 LT |
217 | .procname = "vm", |
218 | .mode = 0555, | |
219 | .child = vm_table, | |
220 | }, | |
1da177e4 | 221 | { |
1da177e4 LT |
222 | .procname = "fs", |
223 | .mode = 0555, | |
224 | .child = fs_table, | |
225 | }, | |
226 | { | |
1da177e4 LT |
227 | .procname = "debug", |
228 | .mode = 0555, | |
229 | .child = debug_table, | |
230 | }, | |
231 | { | |
1da177e4 LT |
232 | .procname = "dev", |
233 | .mode = 0555, | |
234 | .child = dev_table, | |
235 | }, | |
2be7fe07 AM |
236 | /* |
237 | * NOTE: do not add new entries to this table unless you have read | |
238 | * Documentation/sysctl/ctl_unnumbered.txt | |
239 | */ | |
6fce56ec | 240 | { } |
1da177e4 LT |
241 | }; |
242 | ||
77e54a1f | 243 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
244 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
245 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
246 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
247 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
1983a922 CE |
248 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
249 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
acb4a848 CE |
250 | static int min_sched_shares_ratelimit = 100000; /* 100 usec */ |
251 | static int max_sched_shares_ratelimit = NSEC_PER_SEC; /* 1 second */ | |
77e54a1f IM |
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 | }, | |
2398f2c6 | 290 | { |
2398f2c6 PZ |
291 | .procname = "sched_shares_ratelimit", |
292 | .data = &sysctl_sched_shares_ratelimit, | |
293 | .maxlen = sizeof(unsigned int), | |
294 | .mode = 0644, | |
702a7c76 | 295 | .proc_handler = sched_proc_update_handler, |
acb4a848 CE |
296 | .extra1 = &min_sched_shares_ratelimit, |
297 | .extra2 = &max_sched_shares_ratelimit, | |
2398f2c6 | 298 | }, |
1983a922 | 299 | { |
1983a922 CE |
300 | .procname = "sched_tunable_scaling", |
301 | .data = &sysctl_sched_tunable_scaling, | |
302 | .maxlen = sizeof(enum sched_tunable_scaling), | |
303 | .mode = 0644, | |
702a7c76 | 304 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
305 | .extra1 = &min_sched_tunable_scaling, |
306 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 307 | }, |
ffda12a1 | 308 | { |
ffda12a1 PZ |
309 | .procname = "sched_shares_thresh", |
310 | .data = &sysctl_sched_shares_thresh, | |
311 | .maxlen = sizeof(unsigned int), | |
312 | .mode = 0644, | |
6d456111 | 313 | .proc_handler = proc_dointvec_minmax, |
ffda12a1 PZ |
314 | .extra1 = &zero, |
315 | }, | |
da84d961 | 316 | { |
da84d961 IM |
317 | .procname = "sched_migration_cost", |
318 | .data = &sysctl_sched_migration_cost, | |
319 | .maxlen = sizeof(unsigned int), | |
320 | .mode = 0644, | |
6d456111 | 321 | .proc_handler = proc_dointvec, |
da84d961 | 322 | }, |
b82d9fdd | 323 | { |
b82d9fdd PZ |
324 | .procname = "sched_nr_migrate", |
325 | .data = &sysctl_sched_nr_migrate, | |
326 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 327 | .mode = 0644, |
6d456111 | 328 | .proc_handler = proc_dointvec, |
fa85ae24 | 329 | }, |
e9e9250b | 330 | { |
e9e9250b PZ |
331 | .procname = "sched_time_avg", |
332 | .data = &sysctl_sched_time_avg, | |
333 | .maxlen = sizeof(unsigned int), | |
334 | .mode = 0644, | |
6d456111 | 335 | .proc_handler = proc_dointvec, |
e9e9250b | 336 | }, |
cd1bb94b | 337 | { |
cd1bb94b AB |
338 | .procname = "timer_migration", |
339 | .data = &sysctl_timer_migration, | |
340 | .maxlen = sizeof(unsigned int), | |
341 | .mode = 0644, | |
6d456111 | 342 | .proc_handler = proc_dointvec_minmax, |
bfdb4d9f AB |
343 | .extra1 = &zero, |
344 | .extra2 = &one, | |
fa85ae24 | 345 | }, |
1fc84aaa | 346 | #endif |
9f0c1e56 | 347 | { |
9f0c1e56 PZ |
348 | .procname = "sched_rt_period_us", |
349 | .data = &sysctl_sched_rt_period, | |
350 | .maxlen = sizeof(unsigned int), | |
351 | .mode = 0644, | |
6d456111 | 352 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
353 | }, |
354 | { | |
9f0c1e56 PZ |
355 | .procname = "sched_rt_runtime_us", |
356 | .data = &sysctl_sched_rt_runtime, | |
357 | .maxlen = sizeof(int), | |
358 | .mode = 0644, | |
6d456111 | 359 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 360 | }, |
1799e35d | 361 | { |
1799e35d IM |
362 | .procname = "sched_compat_yield", |
363 | .data = &sysctl_sched_compat_yield, | |
364 | .maxlen = sizeof(unsigned int), | |
365 | .mode = 0644, | |
6d456111 | 366 | .proc_handler = proc_dointvec, |
1799e35d | 367 | }, |
f20786ff PZ |
368 | #ifdef CONFIG_PROVE_LOCKING |
369 | { | |
f20786ff PZ |
370 | .procname = "prove_locking", |
371 | .data = &prove_locking, | |
372 | .maxlen = sizeof(int), | |
373 | .mode = 0644, | |
6d456111 | 374 | .proc_handler = proc_dointvec, |
f20786ff PZ |
375 | }, |
376 | #endif | |
377 | #ifdef CONFIG_LOCK_STAT | |
378 | { | |
f20786ff PZ |
379 | .procname = "lock_stat", |
380 | .data = &lock_stat, | |
381 | .maxlen = sizeof(int), | |
382 | .mode = 0644, | |
6d456111 | 383 | .proc_handler = proc_dointvec, |
f20786ff | 384 | }, |
77e54a1f | 385 | #endif |
1da177e4 | 386 | { |
1da177e4 LT |
387 | .procname = "panic", |
388 | .data = &panic_timeout, | |
389 | .maxlen = sizeof(int), | |
390 | .mode = 0644, | |
6d456111 | 391 | .proc_handler = proc_dointvec, |
1da177e4 LT |
392 | }, |
393 | { | |
1da177e4 LT |
394 | .procname = "core_uses_pid", |
395 | .data = &core_uses_pid, | |
396 | .maxlen = sizeof(int), | |
397 | .mode = 0644, | |
6d456111 | 398 | .proc_handler = proc_dointvec, |
1da177e4 LT |
399 | }, |
400 | { | |
1da177e4 LT |
401 | .procname = "core_pattern", |
402 | .data = core_pattern, | |
71ce92f3 | 403 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 404 | .mode = 0644, |
6d456111 | 405 | .proc_handler = proc_dostring, |
1da177e4 | 406 | }, |
a293980c | 407 | { |
a293980c NH |
408 | .procname = "core_pipe_limit", |
409 | .data = &core_pipe_limit, | |
410 | .maxlen = sizeof(unsigned int), | |
411 | .mode = 0644, | |
6d456111 | 412 | .proc_handler = proc_dointvec, |
a293980c | 413 | }, |
34f5a398 | 414 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 415 | { |
1da177e4 | 416 | .procname = "tainted", |
25ddbb18 | 417 | .maxlen = sizeof(long), |
34f5a398 | 418 | .mode = 0644, |
6d456111 | 419 | .proc_handler = proc_taint, |
1da177e4 | 420 | }, |
34f5a398 | 421 | #endif |
9745512c AV |
422 | #ifdef CONFIG_LATENCYTOP |
423 | { | |
424 | .procname = "latencytop", | |
425 | .data = &latencytop_enabled, | |
426 | .maxlen = sizeof(int), | |
427 | .mode = 0644, | |
6d456111 | 428 | .proc_handler = proc_dointvec, |
9745512c AV |
429 | }, |
430 | #endif | |
1da177e4 LT |
431 | #ifdef CONFIG_BLK_DEV_INITRD |
432 | { | |
1da177e4 LT |
433 | .procname = "real-root-dev", |
434 | .data = &real_root_dev, | |
435 | .maxlen = sizeof(int), | |
436 | .mode = 0644, | |
6d456111 | 437 | .proc_handler = proc_dointvec, |
1da177e4 LT |
438 | }, |
439 | #endif | |
45807a1d | 440 | { |
45807a1d IM |
441 | .procname = "print-fatal-signals", |
442 | .data = &print_fatal_signals, | |
443 | .maxlen = sizeof(int), | |
444 | .mode = 0644, | |
6d456111 | 445 | .proc_handler = proc_dointvec, |
45807a1d | 446 | }, |
72c57ed5 | 447 | #ifdef CONFIG_SPARC |
1da177e4 | 448 | { |
1da177e4 LT |
449 | .procname = "reboot-cmd", |
450 | .data = reboot_command, | |
451 | .maxlen = 256, | |
452 | .mode = 0644, | |
6d456111 | 453 | .proc_handler = proc_dostring, |
1da177e4 LT |
454 | }, |
455 | { | |
1da177e4 LT |
456 | .procname = "stop-a", |
457 | .data = &stop_a_enabled, | |
458 | .maxlen = sizeof (int), | |
459 | .mode = 0644, | |
6d456111 | 460 | .proc_handler = proc_dointvec, |
1da177e4 LT |
461 | }, |
462 | { | |
1da177e4 LT |
463 | .procname = "scons-poweroff", |
464 | .data = &scons_pwroff, | |
465 | .maxlen = sizeof (int), | |
466 | .mode = 0644, | |
6d456111 | 467 | .proc_handler = proc_dointvec, |
1da177e4 LT |
468 | }, |
469 | #endif | |
0871420f DM |
470 | #ifdef CONFIG_SPARC64 |
471 | { | |
0871420f DM |
472 | .procname = "tsb-ratio", |
473 | .data = &sysctl_tsb_ratio, | |
474 | .maxlen = sizeof (int), | |
475 | .mode = 0644, | |
6d456111 | 476 | .proc_handler = proc_dointvec, |
0871420f DM |
477 | }, |
478 | #endif | |
1da177e4 LT |
479 | #ifdef __hppa__ |
480 | { | |
1da177e4 LT |
481 | .procname = "soft-power", |
482 | .data = &pwrsw_enabled, | |
483 | .maxlen = sizeof (int), | |
484 | .mode = 0644, | |
6d456111 | 485 | .proc_handler = proc_dointvec, |
1da177e4 LT |
486 | }, |
487 | { | |
1da177e4 LT |
488 | .procname = "unaligned-trap", |
489 | .data = &unaligned_enabled, | |
490 | .maxlen = sizeof (int), | |
491 | .mode = 0644, | |
6d456111 | 492 | .proc_handler = proc_dointvec, |
1da177e4 LT |
493 | }, |
494 | #endif | |
495 | { | |
1da177e4 LT |
496 | .procname = "ctrl-alt-del", |
497 | .data = &C_A_D, | |
498 | .maxlen = sizeof(int), | |
499 | .mode = 0644, | |
6d456111 | 500 | .proc_handler = proc_dointvec, |
1da177e4 | 501 | }, |
606576ce | 502 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 503 | { |
b0fc494f SR |
504 | .procname = "ftrace_enabled", |
505 | .data = &ftrace_enabled, | |
506 | .maxlen = sizeof(int), | |
507 | .mode = 0644, | |
6d456111 | 508 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
509 | }, |
510 | #endif | |
f38f1d2a SR |
511 | #ifdef CONFIG_STACK_TRACER |
512 | { | |
f38f1d2a SR |
513 | .procname = "stack_tracer_enabled", |
514 | .data = &stack_tracer_enabled, | |
515 | .maxlen = sizeof(int), | |
516 | .mode = 0644, | |
6d456111 | 517 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
518 | }, |
519 | #endif | |
944ac425 SR |
520 | #ifdef CONFIG_TRACING |
521 | { | |
3299b4dd | 522 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
523 | .data = &ftrace_dump_on_oops, |
524 | .maxlen = sizeof(int), | |
525 | .mode = 0644, | |
6d456111 | 526 | .proc_handler = proc_dointvec, |
944ac425 SR |
527 | }, |
528 | #endif | |
a1ef5adb | 529 | #ifdef CONFIG_MODULES |
1da177e4 | 530 | { |
1da177e4 LT |
531 | .procname = "modprobe", |
532 | .data = &modprobe_path, | |
533 | .maxlen = KMOD_PATH_LEN, | |
534 | .mode = 0644, | |
6d456111 | 535 | .proc_handler = proc_dostring, |
1da177e4 | 536 | }, |
3d43321b | 537 | { |
3d43321b KC |
538 | .procname = "modules_disabled", |
539 | .data = &modules_disabled, | |
540 | .maxlen = sizeof(int), | |
541 | .mode = 0644, | |
542 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 543 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
544 | .extra1 = &one, |
545 | .extra2 = &one, | |
546 | }, | |
1da177e4 | 547 | #endif |
57ae2508 | 548 | #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET) |
1da177e4 | 549 | { |
1da177e4 | 550 | .procname = "hotplug", |
312c004d KS |
551 | .data = &uevent_helper, |
552 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 553 | .mode = 0644, |
6d456111 | 554 | .proc_handler = proc_dostring, |
1da177e4 LT |
555 | }, |
556 | #endif | |
557 | #ifdef CONFIG_CHR_DEV_SG | |
558 | { | |
1da177e4 LT |
559 | .procname = "sg-big-buff", |
560 | .data = &sg_big_buff, | |
561 | .maxlen = sizeof (int), | |
562 | .mode = 0444, | |
6d456111 | 563 | .proc_handler = proc_dointvec, |
1da177e4 LT |
564 | }, |
565 | #endif | |
566 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
567 | { | |
1da177e4 LT |
568 | .procname = "acct", |
569 | .data = &acct_parm, | |
570 | .maxlen = 3*sizeof(int), | |
571 | .mode = 0644, | |
6d456111 | 572 | .proc_handler = proc_dointvec, |
1da177e4 LT |
573 | }, |
574 | #endif | |
1da177e4 LT |
575 | #ifdef CONFIG_MAGIC_SYSRQ |
576 | { | |
1da177e4 | 577 | .procname = "sysrq", |
5d6f647f | 578 | .data = &__sysrq_enabled, |
1da177e4 LT |
579 | .maxlen = sizeof (int), |
580 | .mode = 0644, | |
6d456111 | 581 | .proc_handler = proc_dointvec, |
1da177e4 LT |
582 | }, |
583 | #endif | |
d6f8ff73 | 584 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 585 | { |
1da177e4 | 586 | .procname = "cad_pid", |
9ec52099 | 587 | .data = NULL, |
1da177e4 LT |
588 | .maxlen = sizeof (int), |
589 | .mode = 0600, | |
6d456111 | 590 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 591 | }, |
d6f8ff73 | 592 | #endif |
1da177e4 | 593 | { |
1da177e4 LT |
594 | .procname = "threads-max", |
595 | .data = &max_threads, | |
596 | .maxlen = sizeof(int), | |
597 | .mode = 0644, | |
6d456111 | 598 | .proc_handler = proc_dointvec, |
1da177e4 LT |
599 | }, |
600 | { | |
1da177e4 LT |
601 | .procname = "random", |
602 | .mode = 0555, | |
603 | .child = random_table, | |
604 | }, | |
1da177e4 | 605 | { |
1da177e4 LT |
606 | .procname = "overflowuid", |
607 | .data = &overflowuid, | |
608 | .maxlen = sizeof(int), | |
609 | .mode = 0644, | |
6d456111 | 610 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
611 | .extra1 = &minolduid, |
612 | .extra2 = &maxolduid, | |
613 | }, | |
614 | { | |
1da177e4 LT |
615 | .procname = "overflowgid", |
616 | .data = &overflowgid, | |
617 | .maxlen = sizeof(int), | |
618 | .mode = 0644, | |
6d456111 | 619 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
620 | .extra1 = &minolduid, |
621 | .extra2 = &maxolduid, | |
622 | }, | |
347a8dc3 | 623 | #ifdef CONFIG_S390 |
1da177e4 LT |
624 | #ifdef CONFIG_MATHEMU |
625 | { | |
1da177e4 LT |
626 | .procname = "ieee_emulation_warnings", |
627 | .data = &sysctl_ieee_emulation_warnings, | |
628 | .maxlen = sizeof(int), | |
629 | .mode = 0644, | |
6d456111 | 630 | .proc_handler = proc_dointvec, |
1da177e4 | 631 | }, |
1da177e4 LT |
632 | #endif |
633 | { | |
1da177e4 LT |
634 | .procname = "userprocess_debug", |
635 | .data = &sysctl_userprocess_debug, | |
636 | .maxlen = sizeof(int), | |
637 | .mode = 0644, | |
6d456111 | 638 | .proc_handler = proc_dointvec, |
1da177e4 LT |
639 | }, |
640 | #endif | |
641 | { | |
1da177e4 LT |
642 | .procname = "pid_max", |
643 | .data = &pid_max, | |
644 | .maxlen = sizeof (int), | |
645 | .mode = 0644, | |
6d456111 | 646 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
647 | .extra1 = &pid_max_min, |
648 | .extra2 = &pid_max_max, | |
649 | }, | |
650 | { | |
1da177e4 LT |
651 | .procname = "panic_on_oops", |
652 | .data = &panic_on_oops, | |
653 | .maxlen = sizeof(int), | |
654 | .mode = 0644, | |
6d456111 | 655 | .proc_handler = proc_dointvec, |
1da177e4 | 656 | }, |
7ef3d2fd JP |
657 | #if defined CONFIG_PRINTK |
658 | { | |
7ef3d2fd JP |
659 | .procname = "printk", |
660 | .data = &console_loglevel, | |
661 | .maxlen = 4*sizeof(int), | |
662 | .mode = 0644, | |
6d456111 | 663 | .proc_handler = proc_dointvec, |
7ef3d2fd | 664 | }, |
1da177e4 | 665 | { |
1da177e4 | 666 | .procname = "printk_ratelimit", |
717115e1 | 667 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
668 | .maxlen = sizeof(int), |
669 | .mode = 0644, | |
6d456111 | 670 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
671 | }, |
672 | { | |
1da177e4 | 673 | .procname = "printk_ratelimit_burst", |
717115e1 | 674 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
675 | .maxlen = sizeof(int), |
676 | .mode = 0644, | |
6d456111 | 677 | .proc_handler = proc_dointvec, |
1da177e4 | 678 | }, |
af91322e | 679 | { |
af91322e DY |
680 | .procname = "printk_delay", |
681 | .data = &printk_delay_msec, | |
682 | .maxlen = sizeof(int), | |
683 | .mode = 0644, | |
6d456111 | 684 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
685 | .extra1 = &zero, |
686 | .extra2 = &ten_thousand, | |
687 | }, | |
7ef3d2fd | 688 | #endif |
1da177e4 | 689 | { |
1da177e4 LT |
690 | .procname = "ngroups_max", |
691 | .data = &ngroups_max, | |
692 | .maxlen = sizeof (int), | |
693 | .mode = 0444, | |
6d456111 | 694 | .proc_handler = proc_dointvec, |
1da177e4 LT |
695 | }, |
696 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
697 | { | |
1da177e4 LT |
698 | .procname = "unknown_nmi_panic", |
699 | .data = &unknown_nmi_panic, | |
700 | .maxlen = sizeof (int), | |
701 | .mode = 0644, | |
6d456111 | 702 | .proc_handler = proc_dointvec, |
1da177e4 | 703 | }, |
407984f1 | 704 | { |
407984f1 DZ |
705 | .procname = "nmi_watchdog", |
706 | .data = &nmi_watchdog_enabled, | |
707 | .maxlen = sizeof (int), | |
708 | .mode = 0644, | |
6d456111 | 709 | .proc_handler = proc_nmi_enabled, |
1da177e4 LT |
710 | }, |
711 | #endif | |
712 | #if defined(CONFIG_X86) | |
8da5adda | 713 | { |
8da5adda DZ |
714 | .procname = "panic_on_unrecovered_nmi", |
715 | .data = &panic_on_unrecovered_nmi, | |
716 | .maxlen = sizeof(int), | |
717 | .mode = 0644, | |
6d456111 | 718 | .proc_handler = proc_dointvec, |
8da5adda | 719 | }, |
5211a242 | 720 | { |
5211a242 KG |
721 | .procname = "panic_on_io_nmi", |
722 | .data = &panic_on_io_nmi, | |
723 | .maxlen = sizeof(int), | |
724 | .mode = 0644, | |
6d456111 | 725 | .proc_handler = proc_dointvec, |
5211a242 | 726 | }, |
1da177e4 | 727 | { |
1da177e4 LT |
728 | .procname = "bootloader_type", |
729 | .data = &bootloader_type, | |
730 | .maxlen = sizeof (int), | |
731 | .mode = 0444, | |
6d456111 | 732 | .proc_handler = proc_dointvec, |
1da177e4 | 733 | }, |
5031296c | 734 | { |
5031296c PA |
735 | .procname = "bootloader_version", |
736 | .data = &bootloader_version, | |
737 | .maxlen = sizeof (int), | |
738 | .mode = 0444, | |
6d456111 | 739 | .proc_handler = proc_dointvec, |
5031296c | 740 | }, |
0741f4d2 | 741 | { |
0741f4d2 CE |
742 | .procname = "kstack_depth_to_print", |
743 | .data = &kstack_depth_to_print, | |
744 | .maxlen = sizeof(int), | |
745 | .mode = 0644, | |
6d456111 | 746 | .proc_handler = proc_dointvec, |
0741f4d2 | 747 | }, |
6e7c4025 | 748 | { |
6e7c4025 IM |
749 | .procname = "io_delay_type", |
750 | .data = &io_delay_type, | |
751 | .maxlen = sizeof(int), | |
752 | .mode = 0644, | |
6d456111 | 753 | .proc_handler = proc_dointvec, |
6e7c4025 | 754 | }, |
1da177e4 | 755 | #endif |
7a9166e3 | 756 | #if defined(CONFIG_MMU) |
1da177e4 | 757 | { |
1da177e4 LT |
758 | .procname = "randomize_va_space", |
759 | .data = &randomize_va_space, | |
760 | .maxlen = sizeof(int), | |
761 | .mode = 0644, | |
6d456111 | 762 | .proc_handler = proc_dointvec, |
1da177e4 | 763 | }, |
7a9166e3 | 764 | #endif |
0152fb37 | 765 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 766 | { |
951f22d5 MS |
767 | .procname = "spin_retry", |
768 | .data = &spin_retry, | |
769 | .maxlen = sizeof (int), | |
770 | .mode = 0644, | |
6d456111 | 771 | .proc_handler = proc_dointvec, |
951f22d5 | 772 | }, |
c255d844 | 773 | #endif |
673d5b43 | 774 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 775 | { |
c255d844 | 776 | .procname = "acpi_video_flags", |
77afcf78 | 777 | .data = &acpi_realmode_flags, |
c255d844 PM |
778 | .maxlen = sizeof (unsigned long), |
779 | .mode = 0644, | |
6d456111 | 780 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 781 | }, |
d2b176ed JS |
782 | #endif |
783 | #ifdef CONFIG_IA64 | |
784 | { | |
d2b176ed JS |
785 | .procname = "ignore-unaligned-usertrap", |
786 | .data = &no_unaligned_warning, | |
787 | .maxlen = sizeof (int), | |
788 | .mode = 0644, | |
6d456111 | 789 | .proc_handler = proc_dointvec, |
d2b176ed | 790 | }, |
88fc241f | 791 | { |
88fc241f DC |
792 | .procname = "unaligned-dump-stack", |
793 | .data = &unaligned_dump_stack, | |
794 | .maxlen = sizeof (int), | |
795 | .mode = 0644, | |
6d456111 | 796 | .proc_handler = proc_dointvec, |
88fc241f | 797 | }, |
bebfa101 | 798 | #endif |
c4f3b63f | 799 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
9c44bc03 | 800 | { |
9c44bc03 IM |
801 | .procname = "softlockup_panic", |
802 | .data = &softlockup_panic, | |
803 | .maxlen = sizeof(int), | |
804 | .mode = 0644, | |
6d456111 | 805 | .proc_handler = proc_dointvec_minmax, |
9c44bc03 IM |
806 | .extra1 = &zero, |
807 | .extra2 = &one, | |
808 | }, | |
c4f3b63f | 809 | { |
c4f3b63f RT |
810 | .procname = "softlockup_thresh", |
811 | .data = &softlockup_thresh, | |
9383d967 | 812 | .maxlen = sizeof(int), |
c4f3b63f | 813 | .mode = 0644, |
6d456111 | 814 | .proc_handler = proc_dosoftlockup_thresh, |
9383d967 | 815 | .extra1 = &neg_one, |
c4f3b63f RT |
816 | .extra2 = &sixty, |
817 | }, | |
e162b39a MSB |
818 | #endif |
819 | #ifdef CONFIG_DETECT_HUNG_TASK | |
820 | { | |
e162b39a MSB |
821 | .procname = "hung_task_panic", |
822 | .data = &sysctl_hung_task_panic, | |
823 | .maxlen = sizeof(int), | |
824 | .mode = 0644, | |
6d456111 | 825 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
826 | .extra1 = &zero, |
827 | .extra2 = &one, | |
828 | }, | |
82a1fcb9 | 829 | { |
82a1fcb9 IM |
830 | .procname = "hung_task_check_count", |
831 | .data = &sysctl_hung_task_check_count, | |
90739081 | 832 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 833 | .mode = 0644, |
6d456111 | 834 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 IM |
835 | }, |
836 | { | |
82a1fcb9 IM |
837 | .procname = "hung_task_timeout_secs", |
838 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 839 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 840 | .mode = 0644, |
6d456111 | 841 | .proc_handler = proc_dohung_task_timeout_secs, |
82a1fcb9 IM |
842 | }, |
843 | { | |
82a1fcb9 IM |
844 | .procname = "hung_task_warnings", |
845 | .data = &sysctl_hung_task_warnings, | |
90739081 | 846 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 847 | .mode = 0644, |
6d456111 | 848 | .proc_handler = proc_doulongvec_minmax, |
82a1fcb9 | 849 | }, |
c4f3b63f | 850 | #endif |
bebfa101 AK |
851 | #ifdef CONFIG_COMPAT |
852 | { | |
bebfa101 AK |
853 | .procname = "compat-log", |
854 | .data = &compat_log, | |
855 | .maxlen = sizeof (int), | |
856 | .mode = 0644, | |
6d456111 | 857 | .proc_handler = proc_dointvec, |
bebfa101 | 858 | }, |
951f22d5 | 859 | #endif |
23f78d4a IM |
860 | #ifdef CONFIG_RT_MUTEXES |
861 | { | |
23f78d4a IM |
862 | .procname = "max_lock_depth", |
863 | .data = &max_lock_depth, | |
864 | .maxlen = sizeof(int), | |
865 | .mode = 0644, | |
6d456111 | 866 | .proc_handler = proc_dointvec, |
23f78d4a | 867 | }, |
5096add8 | 868 | #endif |
10a0a8d4 | 869 | { |
10a0a8d4 JF |
870 | .procname = "poweroff_cmd", |
871 | .data = &poweroff_cmd, | |
872 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
873 | .mode = 0644, | |
6d456111 | 874 | .proc_handler = proc_dostring, |
10a0a8d4 | 875 | }, |
0b77f5bf DH |
876 | #ifdef CONFIG_KEYS |
877 | { | |
0b77f5bf DH |
878 | .procname = "keys", |
879 | .mode = 0555, | |
880 | .child = key_sysctls, | |
881 | }, | |
882 | #endif | |
31a72bce PM |
883 | #ifdef CONFIG_RCU_TORTURE_TEST |
884 | { | |
31a72bce PM |
885 | .procname = "rcutorture_runnable", |
886 | .data = &rcutorture_runnable, | |
887 | .maxlen = sizeof(int), | |
888 | .mode = 0644, | |
6d456111 | 889 | .proc_handler = proc_dointvec, |
31a72bce PM |
890 | }, |
891 | #endif | |
12e22c5e DH |
892 | #ifdef CONFIG_SLOW_WORK |
893 | { | |
12e22c5e DH |
894 | .procname = "slow-work", |
895 | .mode = 0555, | |
896 | .child = slow_work_sysctls, | |
897 | }, | |
898 | #endif | |
cdd6c482 | 899 | #ifdef CONFIG_PERF_EVENTS |
1ccd1549 | 900 | { |
cdd6c482 IM |
901 | .procname = "perf_event_paranoid", |
902 | .data = &sysctl_perf_event_paranoid, | |
903 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 904 | .mode = 0644, |
6d456111 | 905 | .proc_handler = proc_dointvec, |
1ccd1549 | 906 | }, |
c5078f78 | 907 | { |
cdd6c482 IM |
908 | .procname = "perf_event_mlock_kb", |
909 | .data = &sysctl_perf_event_mlock, | |
910 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 911 | .mode = 0644, |
6d456111 | 912 | .proc_handler = proc_dointvec, |
c5078f78 | 913 | }, |
a78ac325 | 914 | { |
cdd6c482 IM |
915 | .procname = "perf_event_max_sample_rate", |
916 | .data = &sysctl_perf_event_sample_rate, | |
917 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 918 | .mode = 0644, |
6d456111 | 919 | .proc_handler = proc_dointvec, |
a78ac325 | 920 | }, |
1ccd1549 | 921 | #endif |
dfec072e VN |
922 | #ifdef CONFIG_KMEMCHECK |
923 | { | |
dfec072e VN |
924 | .procname = "kmemcheck", |
925 | .data = &kmemcheck_enabled, | |
926 | .maxlen = sizeof(int), | |
927 | .mode = 0644, | |
6d456111 | 928 | .proc_handler = proc_dointvec, |
dfec072e VN |
929 | }, |
930 | #endif | |
cb684b5b | 931 | #ifdef CONFIG_BLOCK |
5e605b64 | 932 | { |
5e605b64 JA |
933 | .procname = "blk_iopoll", |
934 | .data = &blk_iopoll_enabled, | |
935 | .maxlen = sizeof(int), | |
936 | .mode = 0644, | |
6d456111 | 937 | .proc_handler = proc_dointvec, |
5e605b64 | 938 | }, |
cb684b5b | 939 | #endif |
ed2c12f3 AM |
940 | /* |
941 | * NOTE: do not add new entries to this table unless you have read | |
942 | * Documentation/sysctl/ctl_unnumbered.txt | |
943 | */ | |
6fce56ec | 944 | { } |
1da177e4 LT |
945 | }; |
946 | ||
d8217f07 | 947 | static struct ctl_table vm_table[] = { |
1da177e4 | 948 | { |
1da177e4 LT |
949 | .procname = "overcommit_memory", |
950 | .data = &sysctl_overcommit_memory, | |
951 | .maxlen = sizeof(sysctl_overcommit_memory), | |
952 | .mode = 0644, | |
6d456111 | 953 | .proc_handler = proc_dointvec, |
1da177e4 | 954 | }, |
fadd8fbd | 955 | { |
fadd8fbd KH |
956 | .procname = "panic_on_oom", |
957 | .data = &sysctl_panic_on_oom, | |
958 | .maxlen = sizeof(sysctl_panic_on_oom), | |
959 | .mode = 0644, | |
6d456111 | 960 | .proc_handler = proc_dointvec, |
fadd8fbd | 961 | }, |
fe071d7e | 962 | { |
fe071d7e DR |
963 | .procname = "oom_kill_allocating_task", |
964 | .data = &sysctl_oom_kill_allocating_task, | |
965 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
966 | .mode = 0644, | |
6d456111 | 967 | .proc_handler = proc_dointvec, |
fe071d7e | 968 | }, |
fef1bdd6 | 969 | { |
fef1bdd6 DR |
970 | .procname = "oom_dump_tasks", |
971 | .data = &sysctl_oom_dump_tasks, | |
972 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
973 | .mode = 0644, | |
6d456111 | 974 | .proc_handler = proc_dointvec, |
fef1bdd6 | 975 | }, |
1da177e4 | 976 | { |
1da177e4 LT |
977 | .procname = "overcommit_ratio", |
978 | .data = &sysctl_overcommit_ratio, | |
979 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
980 | .mode = 0644, | |
6d456111 | 981 | .proc_handler = proc_dointvec, |
1da177e4 LT |
982 | }, |
983 | { | |
1da177e4 LT |
984 | .procname = "page-cluster", |
985 | .data = &page_cluster, | |
986 | .maxlen = sizeof(int), | |
987 | .mode = 0644, | |
6d456111 | 988 | .proc_handler = proc_dointvec, |
1da177e4 LT |
989 | }, |
990 | { | |
1da177e4 LT |
991 | .procname = "dirty_background_ratio", |
992 | .data = &dirty_background_ratio, | |
993 | .maxlen = sizeof(dirty_background_ratio), | |
994 | .mode = 0644, | |
6d456111 | 995 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
996 | .extra1 = &zero, |
997 | .extra2 = &one_hundred, | |
998 | }, | |
2da02997 | 999 | { |
2da02997 DR |
1000 | .procname = "dirty_background_bytes", |
1001 | .data = &dirty_background_bytes, | |
1002 | .maxlen = sizeof(dirty_background_bytes), | |
1003 | .mode = 0644, | |
6d456111 | 1004 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1005 | .extra1 = &one_ul, |
2da02997 | 1006 | }, |
1da177e4 | 1007 | { |
1da177e4 LT |
1008 | .procname = "dirty_ratio", |
1009 | .data = &vm_dirty_ratio, | |
1010 | .maxlen = sizeof(vm_dirty_ratio), | |
1011 | .mode = 0644, | |
6d456111 | 1012 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1013 | .extra1 = &zero, |
1014 | .extra2 = &one_hundred, | |
1015 | }, | |
2da02997 | 1016 | { |
2da02997 DR |
1017 | .procname = "dirty_bytes", |
1018 | .data = &vm_dirty_bytes, | |
1019 | .maxlen = sizeof(vm_dirty_bytes), | |
1020 | .mode = 0644, | |
6d456111 | 1021 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1022 | .extra1 = &dirty_bytes_min, |
2da02997 | 1023 | }, |
1da177e4 | 1024 | { |
1da177e4 | 1025 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1026 | .data = &dirty_writeback_interval, |
1027 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1028 | .mode = 0644, |
6d456111 | 1029 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1030 | }, |
1031 | { | |
1da177e4 | 1032 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1033 | .data = &dirty_expire_interval, |
1034 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1035 | .mode = 0644, |
6d456111 | 1036 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1037 | }, |
1038 | { | |
1da177e4 LT |
1039 | .procname = "nr_pdflush_threads", |
1040 | .data = &nr_pdflush_threads, | |
1041 | .maxlen = sizeof nr_pdflush_threads, | |
1042 | .mode = 0444 /* read-only*/, | |
6d456111 | 1043 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1044 | }, |
1045 | { | |
1da177e4 LT |
1046 | .procname = "swappiness", |
1047 | .data = &vm_swappiness, | |
1048 | .maxlen = sizeof(vm_swappiness), | |
1049 | .mode = 0644, | |
6d456111 | 1050 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1051 | .extra1 = &zero, |
1052 | .extra2 = &one_hundred, | |
1053 | }, | |
1054 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1055 | { |
1da177e4 | 1056 | .procname = "nr_hugepages", |
e5ff2159 | 1057 | .data = NULL, |
1da177e4 LT |
1058 | .maxlen = sizeof(unsigned long), |
1059 | .mode = 0644, | |
6d456111 | 1060 | .proc_handler = hugetlb_sysctl_handler, |
1da177e4 LT |
1061 | .extra1 = (void *)&hugetlb_zero, |
1062 | .extra2 = (void *)&hugetlb_infinity, | |
06808b08 LS |
1063 | }, |
1064 | #ifdef CONFIG_NUMA | |
1065 | { | |
1066 | .procname = "nr_hugepages_mempolicy", | |
1067 | .data = NULL, | |
1068 | .maxlen = sizeof(unsigned long), | |
1069 | .mode = 0644, | |
1070 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
1071 | .extra1 = (void *)&hugetlb_zero, | |
1072 | .extra2 = (void *)&hugetlb_infinity, | |
1073 | }, | |
1074 | #endif | |
1da177e4 | 1075 | { |
1da177e4 LT |
1076 | .procname = "hugetlb_shm_group", |
1077 | .data = &sysctl_hugetlb_shm_group, | |
1078 | .maxlen = sizeof(gid_t), | |
1079 | .mode = 0644, | |
6d456111 | 1080 | .proc_handler = proc_dointvec, |
1da177e4 | 1081 | }, |
396faf03 | 1082 | { |
396faf03 MG |
1083 | .procname = "hugepages_treat_as_movable", |
1084 | .data = &hugepages_treat_as_movable, | |
1085 | .maxlen = sizeof(int), | |
1086 | .mode = 0644, | |
6d456111 | 1087 | .proc_handler = hugetlb_treat_movable_handler, |
396faf03 | 1088 | }, |
d1c3fb1f | 1089 | { |
d1c3fb1f | 1090 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1091 | .data = NULL, |
1092 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1093 | .mode = 0644, |
6d456111 | 1094 | .proc_handler = hugetlb_overcommit_handler, |
e5ff2159 AK |
1095 | .extra1 = (void *)&hugetlb_zero, |
1096 | .extra2 = (void *)&hugetlb_infinity, | |
d1c3fb1f | 1097 | }, |
1da177e4 LT |
1098 | #endif |
1099 | { | |
1da177e4 LT |
1100 | .procname = "lowmem_reserve_ratio", |
1101 | .data = &sysctl_lowmem_reserve_ratio, | |
1102 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1103 | .mode = 0644, | |
6d456111 | 1104 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1105 | }, |
9d0243bc | 1106 | { |
9d0243bc AM |
1107 | .procname = "drop_caches", |
1108 | .data = &sysctl_drop_caches, | |
1109 | .maxlen = sizeof(int), | |
1110 | .mode = 0644, | |
1111 | .proc_handler = drop_caches_sysctl_handler, | |
9d0243bc | 1112 | }, |
1da177e4 | 1113 | { |
1da177e4 LT |
1114 | .procname = "min_free_kbytes", |
1115 | .data = &min_free_kbytes, | |
1116 | .maxlen = sizeof(min_free_kbytes), | |
1117 | .mode = 0644, | |
6d456111 | 1118 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1119 | .extra1 = &zero, |
1120 | }, | |
8ad4b1fb | 1121 | { |
8ad4b1fb RS |
1122 | .procname = "percpu_pagelist_fraction", |
1123 | .data = &percpu_pagelist_fraction, | |
1124 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1125 | .mode = 0644, | |
6d456111 | 1126 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
8ad4b1fb RS |
1127 | .extra1 = &min_percpu_pagelist_fract, |
1128 | }, | |
1da177e4 LT |
1129 | #ifdef CONFIG_MMU |
1130 | { | |
1da177e4 LT |
1131 | .procname = "max_map_count", |
1132 | .data = &sysctl_max_map_count, | |
1133 | .maxlen = sizeof(sysctl_max_map_count), | |
1134 | .mode = 0644, | |
3e26120c | 1135 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1136 | .extra1 = &zero, |
1da177e4 | 1137 | }, |
dd8632a1 PM |
1138 | #else |
1139 | { | |
dd8632a1 PM |
1140 | .procname = "nr_trim_pages", |
1141 | .data = &sysctl_nr_trim_pages, | |
1142 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1143 | .mode = 0644, | |
6d456111 | 1144 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1145 | .extra1 = &zero, |
1146 | }, | |
1da177e4 LT |
1147 | #endif |
1148 | { | |
1da177e4 LT |
1149 | .procname = "laptop_mode", |
1150 | .data = &laptop_mode, | |
1151 | .maxlen = sizeof(laptop_mode), | |
1152 | .mode = 0644, | |
6d456111 | 1153 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1154 | }, |
1155 | { | |
1da177e4 LT |
1156 | .procname = "block_dump", |
1157 | .data = &block_dump, | |
1158 | .maxlen = sizeof(block_dump), | |
1159 | .mode = 0644, | |
6d456111 | 1160 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1161 | .extra1 = &zero, |
1162 | }, | |
1163 | { | |
1da177e4 LT |
1164 | .procname = "vfs_cache_pressure", |
1165 | .data = &sysctl_vfs_cache_pressure, | |
1166 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1167 | .mode = 0644, | |
6d456111 | 1168 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1169 | .extra1 = &zero, |
1170 | }, | |
1171 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1172 | { | |
1da177e4 LT |
1173 | .procname = "legacy_va_layout", |
1174 | .data = &sysctl_legacy_va_layout, | |
1175 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1176 | .mode = 0644, | |
6d456111 | 1177 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1178 | .extra1 = &zero, |
1179 | }, | |
1180 | #endif | |
1743660b CL |
1181 | #ifdef CONFIG_NUMA |
1182 | { | |
1743660b CL |
1183 | .procname = "zone_reclaim_mode", |
1184 | .data = &zone_reclaim_mode, | |
1185 | .maxlen = sizeof(zone_reclaim_mode), | |
1186 | .mode = 0644, | |
6d456111 | 1187 | .proc_handler = proc_dointvec, |
c84db23c | 1188 | .extra1 = &zero, |
1743660b | 1189 | }, |
9614634f | 1190 | { |
9614634f CL |
1191 | .procname = "min_unmapped_ratio", |
1192 | .data = &sysctl_min_unmapped_ratio, | |
1193 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1194 | .mode = 0644, | |
6d456111 | 1195 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1196 | .extra1 = &zero, |
1197 | .extra2 = &one_hundred, | |
1198 | }, | |
0ff38490 | 1199 | { |
0ff38490 CL |
1200 | .procname = "min_slab_ratio", |
1201 | .data = &sysctl_min_slab_ratio, | |
1202 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1203 | .mode = 0644, | |
6d456111 | 1204 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1205 | .extra1 = &zero, |
1206 | .extra2 = &one_hundred, | |
1207 | }, | |
e6e5494c | 1208 | #endif |
77461ab3 CL |
1209 | #ifdef CONFIG_SMP |
1210 | { | |
77461ab3 CL |
1211 | .procname = "stat_interval", |
1212 | .data = &sysctl_stat_interval, | |
1213 | .maxlen = sizeof(sysctl_stat_interval), | |
1214 | .mode = 0644, | |
6d456111 | 1215 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1216 | }, |
1217 | #endif | |
6e141546 | 1218 | #ifdef CONFIG_MMU |
ed032189 | 1219 | { |
ed032189 | 1220 | .procname = "mmap_min_addr", |
788084ab EP |
1221 | .data = &dac_mmap_min_addr, |
1222 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1223 | .mode = 0644, |
6d456111 | 1224 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1225 | }, |
6e141546 | 1226 | #endif |
f0c0b2b8 KH |
1227 | #ifdef CONFIG_NUMA |
1228 | { | |
f0c0b2b8 KH |
1229 | .procname = "numa_zonelist_order", |
1230 | .data = &numa_zonelist_order, | |
1231 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1232 | .mode = 0644, | |
6d456111 | 1233 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1234 | }, |
1235 | #endif | |
2b8232ce | 1236 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1237 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1238 | { |
e6e5494c IM |
1239 | .procname = "vdso_enabled", |
1240 | .data = &vdso_enabled, | |
1241 | .maxlen = sizeof(vdso_enabled), | |
1242 | .mode = 0644, | |
6d456111 | 1243 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1244 | .extra1 = &zero, |
1245 | }, | |
1da177e4 | 1246 | #endif |
195cf453 BG |
1247 | #ifdef CONFIG_HIGHMEM |
1248 | { | |
195cf453 BG |
1249 | .procname = "highmem_is_dirtyable", |
1250 | .data = &vm_highmem_is_dirtyable, | |
1251 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1252 | .mode = 0644, | |
6d456111 | 1253 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1254 | .extra1 = &zero, |
1255 | .extra2 = &one, | |
1256 | }, | |
1257 | #endif | |
4be6f6bb | 1258 | { |
4be6f6bb PZ |
1259 | .procname = "scan_unevictable_pages", |
1260 | .data = &scan_unevictable_pages, | |
1261 | .maxlen = sizeof(scan_unevictable_pages), | |
1262 | .mode = 0644, | |
6d456111 | 1263 | .proc_handler = scan_unevictable_handler, |
4be6f6bb | 1264 | }, |
6a46079c AK |
1265 | #ifdef CONFIG_MEMORY_FAILURE |
1266 | { | |
6a46079c AK |
1267 | .procname = "memory_failure_early_kill", |
1268 | .data = &sysctl_memory_failure_early_kill, | |
1269 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1270 | .mode = 0644, | |
6d456111 | 1271 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1272 | .extra1 = &zero, |
1273 | .extra2 = &one, | |
1274 | }, | |
1275 | { | |
6a46079c AK |
1276 | .procname = "memory_failure_recovery", |
1277 | .data = &sysctl_memory_failure_recovery, | |
1278 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1279 | .mode = 0644, | |
6d456111 | 1280 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1281 | .extra1 = &zero, |
1282 | .extra2 = &one, | |
1283 | }, | |
1284 | #endif | |
1285 | ||
2be7fe07 AM |
1286 | /* |
1287 | * NOTE: do not add new entries to this table unless you have read | |
1288 | * Documentation/sysctl/ctl_unnumbered.txt | |
1289 | */ | |
6fce56ec | 1290 | { } |
1da177e4 LT |
1291 | }; |
1292 | ||
2abc26fc | 1293 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1294 | static struct ctl_table binfmt_misc_table[] = { |
6fce56ec | 1295 | { } |
2abc26fc EB |
1296 | }; |
1297 | #endif | |
1298 | ||
d8217f07 | 1299 | static struct ctl_table fs_table[] = { |
1da177e4 | 1300 | { |
1da177e4 LT |
1301 | .procname = "inode-nr", |
1302 | .data = &inodes_stat, | |
1303 | .maxlen = 2*sizeof(int), | |
1304 | .mode = 0444, | |
6d456111 | 1305 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1306 | }, |
1307 | { | |
1da177e4 LT |
1308 | .procname = "inode-state", |
1309 | .data = &inodes_stat, | |
1310 | .maxlen = 7*sizeof(int), | |
1311 | .mode = 0444, | |
6d456111 | 1312 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1313 | }, |
1314 | { | |
1da177e4 LT |
1315 | .procname = "file-nr", |
1316 | .data = &files_stat, | |
1317 | .maxlen = 3*sizeof(int), | |
1318 | .mode = 0444, | |
6d456111 | 1319 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1320 | }, |
1321 | { | |
1da177e4 LT |
1322 | .procname = "file-max", |
1323 | .data = &files_stat.max_files, | |
1324 | .maxlen = sizeof(int), | |
1325 | .mode = 0644, | |
6d456111 | 1326 | .proc_handler = proc_dointvec, |
1da177e4 | 1327 | }, |
9cfe015a | 1328 | { |
9cfe015a ED |
1329 | .procname = "nr_open", |
1330 | .data = &sysctl_nr_open, | |
1331 | .maxlen = sizeof(int), | |
1332 | .mode = 0644, | |
6d456111 | 1333 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1334 | .extra1 = &sysctl_nr_open_min, |
1335 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1336 | }, |
1da177e4 | 1337 | { |
1da177e4 LT |
1338 | .procname = "dentry-state", |
1339 | .data = &dentry_stat, | |
1340 | .maxlen = 6*sizeof(int), | |
1341 | .mode = 0444, | |
6d456111 | 1342 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1343 | }, |
1344 | { | |
1da177e4 LT |
1345 | .procname = "overflowuid", |
1346 | .data = &fs_overflowuid, | |
1347 | .maxlen = sizeof(int), | |
1348 | .mode = 0644, | |
6d456111 | 1349 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1350 | .extra1 = &minolduid, |
1351 | .extra2 = &maxolduid, | |
1352 | }, | |
1353 | { | |
1da177e4 LT |
1354 | .procname = "overflowgid", |
1355 | .data = &fs_overflowgid, | |
1356 | .maxlen = sizeof(int), | |
1357 | .mode = 0644, | |
6d456111 | 1358 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1359 | .extra1 = &minolduid, |
1360 | .extra2 = &maxolduid, | |
1361 | }, | |
bfcd17a6 | 1362 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1363 | { |
1da177e4 LT |
1364 | .procname = "leases-enable", |
1365 | .data = &leases_enable, | |
1366 | .maxlen = sizeof(int), | |
1367 | .mode = 0644, | |
6d456111 | 1368 | .proc_handler = proc_dointvec, |
1da177e4 | 1369 | }, |
bfcd17a6 | 1370 | #endif |
1da177e4 LT |
1371 | #ifdef CONFIG_DNOTIFY |
1372 | { | |
1da177e4 LT |
1373 | .procname = "dir-notify-enable", |
1374 | .data = &dir_notify_enable, | |
1375 | .maxlen = sizeof(int), | |
1376 | .mode = 0644, | |
6d456111 | 1377 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1378 | }, |
1379 | #endif | |
1380 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1381 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1382 | { |
1da177e4 LT |
1383 | .procname = "lease-break-time", |
1384 | .data = &lease_break_time, | |
1385 | .maxlen = sizeof(int), | |
1386 | .mode = 0644, | |
6d456111 | 1387 | .proc_handler = proc_dointvec, |
1da177e4 | 1388 | }, |
bfcd17a6 | 1389 | #endif |
ebf3f09c | 1390 | #ifdef CONFIG_AIO |
1da177e4 | 1391 | { |
1da177e4 LT |
1392 | .procname = "aio-nr", |
1393 | .data = &aio_nr, | |
1394 | .maxlen = sizeof(aio_nr), | |
1395 | .mode = 0444, | |
6d456111 | 1396 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1397 | }, |
1398 | { | |
1da177e4 LT |
1399 | .procname = "aio-max-nr", |
1400 | .data = &aio_max_nr, | |
1401 | .maxlen = sizeof(aio_max_nr), | |
1402 | .mode = 0644, | |
6d456111 | 1403 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1404 | }, |
ebf3f09c | 1405 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1406 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1407 | { |
0399cb08 RL |
1408 | .procname = "inotify", |
1409 | .mode = 0555, | |
1410 | .child = inotify_table, | |
1411 | }, | |
1412 | #endif | |
7ef9964e DL |
1413 | #ifdef CONFIG_EPOLL |
1414 | { | |
1415 | .procname = "epoll", | |
1416 | .mode = 0555, | |
1417 | .child = epoll_table, | |
1418 | }, | |
1419 | #endif | |
1da177e4 | 1420 | #endif |
d6e71144 | 1421 | { |
d6e71144 AC |
1422 | .procname = "suid_dumpable", |
1423 | .data = &suid_dumpable, | |
1424 | .maxlen = sizeof(int), | |
1425 | .mode = 0644, | |
6d456111 | 1426 | .proc_handler = proc_dointvec_minmax, |
8e654fba MW |
1427 | .extra1 = &zero, |
1428 | .extra2 = &two, | |
d6e71144 | 1429 | }, |
2abc26fc EB |
1430 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1431 | { | |
2abc26fc EB |
1432 | .procname = "binfmt_misc", |
1433 | .mode = 0555, | |
1434 | .child = binfmt_misc_table, | |
1435 | }, | |
1436 | #endif | |
2be7fe07 AM |
1437 | /* |
1438 | * NOTE: do not add new entries to this table unless you have read | |
1439 | * Documentation/sysctl/ctl_unnumbered.txt | |
2be7fe07 | 1440 | */ |
6fce56ec | 1441 | { } |
1da177e4 LT |
1442 | }; |
1443 | ||
d8217f07 | 1444 | static struct ctl_table debug_table[] = { |
4b177647 | 1445 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) |
abd4f750 | 1446 | { |
abd4f750 MAS |
1447 | .procname = "exception-trace", |
1448 | .data = &show_unhandled_signals, | |
1449 | .maxlen = sizeof(int), | |
1450 | .mode = 0644, | |
1451 | .proc_handler = proc_dointvec | |
1452 | }, | |
b2be84df MH |
1453 | #endif |
1454 | #if defined(CONFIG_OPTPROBES) | |
1455 | { | |
1456 | .procname = "kprobes-optimization", | |
1457 | .data = &sysctl_kprobes_optimization, | |
1458 | .maxlen = sizeof(int), | |
1459 | .mode = 0644, | |
1460 | .proc_handler = proc_kprobes_optimization_handler, | |
1461 | .extra1 = &zero, | |
1462 | .extra2 = &one, | |
1463 | }, | |
abd4f750 | 1464 | #endif |
6fce56ec | 1465 | { } |
1da177e4 LT |
1466 | }; |
1467 | ||
d8217f07 | 1468 | static struct ctl_table dev_table[] = { |
6fce56ec | 1469 | { } |
0eeca283 | 1470 | }; |
1da177e4 | 1471 | |
330d57fb AV |
1472 | static DEFINE_SPINLOCK(sysctl_lock); |
1473 | ||
1474 | /* called under sysctl_lock */ | |
1475 | static int use_table(struct ctl_table_header *p) | |
1476 | { | |
1477 | if (unlikely(p->unregistering)) | |
1478 | return 0; | |
1479 | p->used++; | |
1480 | return 1; | |
1481 | } | |
1482 | ||
1483 | /* called under sysctl_lock */ | |
1484 | static void unuse_table(struct ctl_table_header *p) | |
1485 | { | |
1486 | if (!--p->used) | |
1487 | if (unlikely(p->unregistering)) | |
1488 | complete(p->unregistering); | |
1489 | } | |
1490 | ||
1491 | /* called under sysctl_lock, will reacquire if has to wait */ | |
1492 | static void start_unregistering(struct ctl_table_header *p) | |
1493 | { | |
1494 | /* | |
1495 | * if p->used is 0, nobody will ever touch that entry again; | |
1496 | * we'll eliminate all paths to it before dropping sysctl_lock | |
1497 | */ | |
1498 | if (unlikely(p->used)) { | |
1499 | struct completion wait; | |
1500 | init_completion(&wait); | |
1501 | p->unregistering = &wait; | |
1502 | spin_unlock(&sysctl_lock); | |
1503 | wait_for_completion(&wait); | |
1504 | spin_lock(&sysctl_lock); | |
f7e6ced4 AV |
1505 | } else { |
1506 | /* anything non-NULL; we'll never dereference it */ | |
1507 | p->unregistering = ERR_PTR(-EINVAL); | |
330d57fb AV |
1508 | } |
1509 | /* | |
1510 | * do not remove from the list until nobody holds it; walking the | |
1511 | * list in do_sysctl() relies on that. | |
1512 | */ | |
1513 | list_del_init(&p->ctl_entry); | |
1514 | } | |
1515 | ||
f7e6ced4 AV |
1516 | void sysctl_head_get(struct ctl_table_header *head) |
1517 | { | |
1518 | spin_lock(&sysctl_lock); | |
1519 | head->count++; | |
1520 | spin_unlock(&sysctl_lock); | |
1521 | } | |
1522 | ||
1523 | void sysctl_head_put(struct ctl_table_header *head) | |
1524 | { | |
1525 | spin_lock(&sysctl_lock); | |
1526 | if (!--head->count) | |
1527 | kfree(head); | |
1528 | spin_unlock(&sysctl_lock); | |
1529 | } | |
1530 | ||
1531 | struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head) | |
1532 | { | |
1533 | if (!head) | |
1534 | BUG(); | |
1535 | spin_lock(&sysctl_lock); | |
1536 | if (!use_table(head)) | |
1537 | head = ERR_PTR(-ENOENT); | |
1538 | spin_unlock(&sysctl_lock); | |
1539 | return head; | |
1540 | } | |
1541 | ||
805b5d5e EB |
1542 | void sysctl_head_finish(struct ctl_table_header *head) |
1543 | { | |
1544 | if (!head) | |
1545 | return; | |
1546 | spin_lock(&sysctl_lock); | |
1547 | unuse_table(head); | |
1548 | spin_unlock(&sysctl_lock); | |
1549 | } | |
1550 | ||
73455092 AV |
1551 | static struct ctl_table_set * |
1552 | lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces) | |
1553 | { | |
1554 | struct ctl_table_set *set = &root->default_set; | |
1555 | if (root->lookup) | |
1556 | set = root->lookup(root, namespaces); | |
1557 | return set; | |
1558 | } | |
1559 | ||
e51b6ba0 EB |
1560 | static struct list_head * |
1561 | lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces) | |
805b5d5e | 1562 | { |
73455092 AV |
1563 | struct ctl_table_set *set = lookup_header_set(root, namespaces); |
1564 | return &set->list; | |
e51b6ba0 EB |
1565 | } |
1566 | ||
1567 | struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces, | |
1568 | struct ctl_table_header *prev) | |
1569 | { | |
1570 | struct ctl_table_root *root; | |
1571 | struct list_head *header_list; | |
805b5d5e EB |
1572 | struct ctl_table_header *head; |
1573 | struct list_head *tmp; | |
e51b6ba0 | 1574 | |
805b5d5e EB |
1575 | spin_lock(&sysctl_lock); |
1576 | if (prev) { | |
e51b6ba0 | 1577 | head = prev; |
805b5d5e EB |
1578 | tmp = &prev->ctl_entry; |
1579 | unuse_table(prev); | |
1580 | goto next; | |
1581 | } | |
1582 | tmp = &root_table_header.ctl_entry; | |
1583 | for (;;) { | |
1584 | head = list_entry(tmp, struct ctl_table_header, ctl_entry); | |
1585 | ||
1586 | if (!use_table(head)) | |
1587 | goto next; | |
1588 | spin_unlock(&sysctl_lock); | |
1589 | return head; | |
1590 | next: | |
e51b6ba0 | 1591 | root = head->root; |
805b5d5e | 1592 | tmp = tmp->next; |
e51b6ba0 EB |
1593 | header_list = lookup_header_list(root, namespaces); |
1594 | if (tmp != header_list) | |
1595 | continue; | |
1596 | ||
1597 | do { | |
1598 | root = list_entry(root->root_list.next, | |
1599 | struct ctl_table_root, root_list); | |
1600 | if (root == &sysctl_table_root) | |
1601 | goto out; | |
1602 | header_list = lookup_header_list(root, namespaces); | |
1603 | } while (list_empty(header_list)); | |
1604 | tmp = header_list->next; | |
805b5d5e | 1605 | } |
e51b6ba0 | 1606 | out: |
805b5d5e EB |
1607 | spin_unlock(&sysctl_lock); |
1608 | return NULL; | |
1609 | } | |
1610 | ||
e51b6ba0 EB |
1611 | struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev) |
1612 | { | |
1613 | return __sysctl_head_next(current->nsproxy, prev); | |
1614 | } | |
1615 | ||
1616 | void register_sysctl_root(struct ctl_table_root *root) | |
1617 | { | |
1618 | spin_lock(&sysctl_lock); | |
1619 | list_add_tail(&root->root_list, &sysctl_table_root.root_list); | |
1620 | spin_unlock(&sysctl_lock); | |
1621 | } | |
1622 | ||
1da177e4 | 1623 | /* |
1ff007eb | 1624 | * sysctl_perm does NOT grant the superuser all rights automatically, because |
1da177e4 LT |
1625 | * some sysctl variables are readonly even to root. |
1626 | */ | |
1627 | ||
1628 | static int test_perm(int mode, int op) | |
1629 | { | |
76aac0e9 | 1630 | if (!current_euid()) |
1da177e4 LT |
1631 | mode >>= 6; |
1632 | else if (in_egroup_p(0)) | |
1633 | mode >>= 3; | |
e6305c43 | 1634 | if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0) |
1da177e4 LT |
1635 | return 0; |
1636 | return -EACCES; | |
1637 | } | |
1638 | ||
d7321cd6 | 1639 | int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op) |
1da177e4 LT |
1640 | { |
1641 | int error; | |
d7321cd6 PE |
1642 | int mode; |
1643 | ||
e6305c43 | 1644 | error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC)); |
1da177e4 LT |
1645 | if (error) |
1646 | return error; | |
d7321cd6 PE |
1647 | |
1648 | if (root->permissions) | |
1649 | mode = root->permissions(root, current->nsproxy, table); | |
1650 | else | |
1651 | mode = table->mode; | |
1652 | ||
1653 | return test_perm(mode, op); | |
1da177e4 LT |
1654 | } |
1655 | ||
d912b0cc EB |
1656 | static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table) |
1657 | { | |
2315ffa0 | 1658 | for (; table->procname; table++) { |
d912b0cc EB |
1659 | table->parent = parent; |
1660 | if (table->child) | |
1661 | sysctl_set_parent(table, table->child); | |
1662 | } | |
1663 | } | |
1664 | ||
1665 | static __init int sysctl_init(void) | |
1666 | { | |
1667 | sysctl_set_parent(NULL, root_table); | |
88f458e4 HS |
1668 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
1669 | { | |
1670 | int err; | |
1671 | err = sysctl_check_table(current->nsproxy, root_table); | |
1672 | } | |
1673 | #endif | |
d912b0cc EB |
1674 | return 0; |
1675 | } | |
1676 | ||
1677 | core_initcall(sysctl_init); | |
1678 | ||
bfbcf034 AV |
1679 | static struct ctl_table *is_branch_in(struct ctl_table *branch, |
1680 | struct ctl_table *table) | |
ae7edecc AV |
1681 | { |
1682 | struct ctl_table *p; | |
1683 | const char *s = branch->procname; | |
1684 | ||
1685 | /* branch should have named subdirectory as its first element */ | |
1686 | if (!s || !branch->child) | |
bfbcf034 | 1687 | return NULL; |
ae7edecc AV |
1688 | |
1689 | /* ... and nothing else */ | |
2315ffa0 | 1690 | if (branch[1].procname) |
bfbcf034 | 1691 | return NULL; |
ae7edecc AV |
1692 | |
1693 | /* table should contain subdirectory with the same name */ | |
2315ffa0 | 1694 | for (p = table; p->procname; p++) { |
ae7edecc AV |
1695 | if (!p->child) |
1696 | continue; | |
1697 | if (p->procname && strcmp(p->procname, s) == 0) | |
bfbcf034 | 1698 | return p; |
ae7edecc | 1699 | } |
bfbcf034 | 1700 | return NULL; |
ae7edecc AV |
1701 | } |
1702 | ||
1703 | /* see if attaching q to p would be an improvement */ | |
1704 | static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q) | |
1705 | { | |
1706 | struct ctl_table *to = p->ctl_table, *by = q->ctl_table; | |
bfbcf034 | 1707 | struct ctl_table *next; |
ae7edecc AV |
1708 | int is_better = 0; |
1709 | int not_in_parent = !p->attached_by; | |
1710 | ||
bfbcf034 | 1711 | while ((next = is_branch_in(by, to)) != NULL) { |
ae7edecc AV |
1712 | if (by == q->attached_by) |
1713 | is_better = 1; | |
1714 | if (to == p->attached_by) | |
1715 | not_in_parent = 1; | |
1716 | by = by->child; | |
bfbcf034 | 1717 | to = next->child; |
ae7edecc AV |
1718 | } |
1719 | ||
1720 | if (is_better && not_in_parent) { | |
1721 | q->attached_by = by; | |
1722 | q->attached_to = to; | |
1723 | q->parent = p; | |
1724 | } | |
1725 | } | |
1726 | ||
1da177e4 | 1727 | /** |
e51b6ba0 EB |
1728 | * __register_sysctl_paths - register a sysctl hierarchy |
1729 | * @root: List of sysctl headers to register on | |
1730 | * @namespaces: Data to compute which lists of sysctl entries are visible | |
29e796fd | 1731 | * @path: The path to the directory the sysctl table is in. |
1da177e4 | 1732 | * @table: the top-level table structure |
1da177e4 LT |
1733 | * |
1734 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
29e796fd | 1735 | * array. A completely 0 filled entry terminates the table. |
1da177e4 | 1736 | * |
d8217f07 | 1737 | * The members of the &struct ctl_table structure are used as follows: |
1da177e4 | 1738 | * |
1da177e4 LT |
1739 | * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not |
1740 | * enter a sysctl file | |
1741 | * | |
1742 | * data - a pointer to data for use by proc_handler | |
1743 | * | |
1744 | * maxlen - the maximum size in bytes of the data | |
1745 | * | |
1746 | * mode - the file permissions for the /proc/sys file, and for sysctl(2) | |
1747 | * | |
1748 | * child - a pointer to the child sysctl table if this entry is a directory, or | |
1749 | * %NULL. | |
1750 | * | |
1751 | * proc_handler - the text handler routine (described below) | |
1752 | * | |
1da177e4 LT |
1753 | * de - for internal use by the sysctl routines |
1754 | * | |
1755 | * extra1, extra2 - extra pointers usable by the proc handler routines | |
1756 | * | |
1757 | * Leaf nodes in the sysctl tree will be represented by a single file | |
1758 | * under /proc; non-leaf nodes will be represented by directories. | |
1759 | * | |
1760 | * sysctl(2) can automatically manage read and write requests through | |
1761 | * the sysctl table. The data and maxlen fields of the ctl_table | |
1762 | * struct enable minimal validation of the values being written to be | |
1763 | * performed, and the mode field allows minimal authentication. | |
1764 | * | |
1da177e4 LT |
1765 | * There must be a proc_handler routine for any terminal nodes |
1766 | * mirrored under /proc/sys (non-terminals are handled by a built-in | |
1767 | * directory handler). Several default handlers are available to | |
1768 | * cover common cases - | |
1769 | * | |
1770 | * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(), | |
1771 | * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(), | |
1772 | * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax() | |
1773 | * | |
1774 | * It is the handler's job to read the input buffer from user memory | |
1775 | * and process it. The handler should return 0 on success. | |
1776 | * | |
1777 | * This routine returns %NULL on a failure to register, and a pointer | |
1778 | * to the table header on success. | |
1779 | */ | |
e51b6ba0 EB |
1780 | struct ctl_table_header *__register_sysctl_paths( |
1781 | struct ctl_table_root *root, | |
1782 | struct nsproxy *namespaces, | |
1783 | const struct ctl_path *path, struct ctl_table *table) | |
1da177e4 | 1784 | { |
29e796fd EB |
1785 | struct ctl_table_header *header; |
1786 | struct ctl_table *new, **prevp; | |
1787 | unsigned int n, npath; | |
ae7edecc | 1788 | struct ctl_table_set *set; |
29e796fd EB |
1789 | |
1790 | /* Count the path components */ | |
2315ffa0 | 1791 | for (npath = 0; path[npath].procname; ++npath) |
29e796fd EB |
1792 | ; |
1793 | ||
1794 | /* | |
1795 | * For each path component, allocate a 2-element ctl_table array. | |
1796 | * The first array element will be filled with the sysctl entry | |
2315ffa0 | 1797 | * for this, the second will be the sentinel (procname == 0). |
29e796fd EB |
1798 | * |
1799 | * We allocate everything in one go so that we don't have to | |
1800 | * worry about freeing additional memory in unregister_sysctl_table. | |
1801 | */ | |
1802 | header = kzalloc(sizeof(struct ctl_table_header) + | |
1803 | (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL); | |
1804 | if (!header) | |
1da177e4 | 1805 | return NULL; |
29e796fd EB |
1806 | |
1807 | new = (struct ctl_table *) (header + 1); | |
1808 | ||
1809 | /* Now connect the dots */ | |
1810 | prevp = &header->ctl_table; | |
1811 | for (n = 0; n < npath; ++n, ++path) { | |
1812 | /* Copy the procname */ | |
1813 | new->procname = path->procname; | |
29e796fd EB |
1814 | new->mode = 0555; |
1815 | ||
1816 | *prevp = new; | |
1817 | prevp = &new->child; | |
1818 | ||
1819 | new += 2; | |
1820 | } | |
1821 | *prevp = table; | |
23eb06de | 1822 | header->ctl_table_arg = table; |
29e796fd EB |
1823 | |
1824 | INIT_LIST_HEAD(&header->ctl_entry); | |
1825 | header->used = 0; | |
1826 | header->unregistering = NULL; | |
e51b6ba0 | 1827 | header->root = root; |
29e796fd | 1828 | sysctl_set_parent(NULL, header->ctl_table); |
f7e6ced4 | 1829 | header->count = 1; |
88f458e4 | 1830 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
e51b6ba0 | 1831 | if (sysctl_check_table(namespaces, header->ctl_table)) { |
29e796fd | 1832 | kfree(header); |
fc6cd25b EB |
1833 | return NULL; |
1834 | } | |
88f458e4 | 1835 | #endif |
330d57fb | 1836 | spin_lock(&sysctl_lock); |
73455092 | 1837 | header->set = lookup_header_set(root, namespaces); |
ae7edecc AV |
1838 | header->attached_by = header->ctl_table; |
1839 | header->attached_to = root_table; | |
1840 | header->parent = &root_table_header; | |
1841 | for (set = header->set; set; set = set->parent) { | |
1842 | struct ctl_table_header *p; | |
1843 | list_for_each_entry(p, &set->list, ctl_entry) { | |
1844 | if (p->unregistering) | |
1845 | continue; | |
1846 | try_attach(p, header); | |
1847 | } | |
1848 | } | |
1849 | header->parent->count++; | |
73455092 | 1850 | list_add_tail(&header->ctl_entry, &header->set->list); |
330d57fb | 1851 | spin_unlock(&sysctl_lock); |
29e796fd EB |
1852 | |
1853 | return header; | |
1854 | } | |
1855 | ||
e51b6ba0 EB |
1856 | /** |
1857 | * register_sysctl_table_path - register a sysctl table hierarchy | |
1858 | * @path: The path to the directory the sysctl table is in. | |
1859 | * @table: the top-level table structure | |
1860 | * | |
1861 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
1862 | * array. A completely 0 filled entry terminates the table. | |
1863 | * | |
1864 | * See __register_sysctl_paths for more details. | |
1865 | */ | |
1866 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, | |
1867 | struct ctl_table *table) | |
1868 | { | |
1869 | return __register_sysctl_paths(&sysctl_table_root, current->nsproxy, | |
1870 | path, table); | |
1871 | } | |
1872 | ||
29e796fd EB |
1873 | /** |
1874 | * register_sysctl_table - register a sysctl table hierarchy | |
1875 | * @table: the top-level table structure | |
1876 | * | |
1877 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
1878 | * array. A completely 0 filled entry terminates the table. | |
1879 | * | |
1880 | * See register_sysctl_paths for more details. | |
1881 | */ | |
1882 | struct ctl_table_header *register_sysctl_table(struct ctl_table *table) | |
1883 | { | |
1884 | static const struct ctl_path null_path[] = { {} }; | |
1885 | ||
1886 | return register_sysctl_paths(null_path, table); | |
1da177e4 LT |
1887 | } |
1888 | ||
1889 | /** | |
1890 | * unregister_sysctl_table - unregister a sysctl table hierarchy | |
1891 | * @header: the header returned from register_sysctl_table | |
1892 | * | |
1893 | * Unregisters the sysctl table and all children. proc entries may not | |
1894 | * actually be removed until they are no longer used by anyone. | |
1895 | */ | |
1896 | void unregister_sysctl_table(struct ctl_table_header * header) | |
1897 | { | |
330d57fb | 1898 | might_sleep(); |
f1dad166 PE |
1899 | |
1900 | if (header == NULL) | |
1901 | return; | |
1902 | ||
330d57fb AV |
1903 | spin_lock(&sysctl_lock); |
1904 | start_unregistering(header); | |
ae7edecc AV |
1905 | if (!--header->parent->count) { |
1906 | WARN_ON(1); | |
1907 | kfree(header->parent); | |
1908 | } | |
f7e6ced4 AV |
1909 | if (!--header->count) |
1910 | kfree(header); | |
330d57fb | 1911 | spin_unlock(&sysctl_lock); |
1da177e4 LT |
1912 | } |
1913 | ||
9043476f AV |
1914 | int sysctl_is_seen(struct ctl_table_header *p) |
1915 | { | |
1916 | struct ctl_table_set *set = p->set; | |
1917 | int res; | |
1918 | spin_lock(&sysctl_lock); | |
1919 | if (p->unregistering) | |
1920 | res = 0; | |
1921 | else if (!set->is_seen) | |
1922 | res = 1; | |
1923 | else | |
1924 | res = set->is_seen(set); | |
1925 | spin_unlock(&sysctl_lock); | |
1926 | return res; | |
1927 | } | |
1928 | ||
73455092 AV |
1929 | void setup_sysctl_set(struct ctl_table_set *p, |
1930 | struct ctl_table_set *parent, | |
1931 | int (*is_seen)(struct ctl_table_set *)) | |
1932 | { | |
1933 | INIT_LIST_HEAD(&p->list); | |
1934 | p->parent = parent ? parent : &sysctl_table_root.default_set; | |
1935 | p->is_seen = is_seen; | |
1936 | } | |
1937 | ||
b89a8171 | 1938 | #else /* !CONFIG_SYSCTL */ |
d8217f07 | 1939 | struct ctl_table_header *register_sysctl_table(struct ctl_table * table) |
b89a8171 EB |
1940 | { |
1941 | return NULL; | |
1942 | } | |
1943 | ||
29e796fd EB |
1944 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, |
1945 | struct ctl_table *table) | |
1946 | { | |
1947 | return NULL; | |
1948 | } | |
1949 | ||
b89a8171 EB |
1950 | void unregister_sysctl_table(struct ctl_table_header * table) |
1951 | { | |
1952 | } | |
1953 | ||
73455092 AV |
1954 | void setup_sysctl_set(struct ctl_table_set *p, |
1955 | struct ctl_table_set *parent, | |
1956 | int (*is_seen)(struct ctl_table_set *)) | |
1957 | { | |
1958 | } | |
1959 | ||
f7e6ced4 AV |
1960 | void sysctl_head_put(struct ctl_table_header *head) |
1961 | { | |
1962 | } | |
1963 | ||
b89a8171 EB |
1964 | #endif /* CONFIG_SYSCTL */ |
1965 | ||
1da177e4 LT |
1966 | /* |
1967 | * /proc/sys support | |
1968 | */ | |
1969 | ||
b89a8171 | 1970 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1971 | |
b1ba4ddd | 1972 | static int _proc_do_string(void* data, int maxlen, int write, |
8d65af78 | 1973 | void __user *buffer, |
b1ba4ddd | 1974 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1975 | { |
1976 | size_t len; | |
1977 | char __user *p; | |
1978 | char c; | |
8d060877 ON |
1979 | |
1980 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1981 | *lenp = 0; |
1982 | return 0; | |
1983 | } | |
8d060877 | 1984 | |
1da177e4 LT |
1985 | if (write) { |
1986 | len = 0; | |
1987 | p = buffer; | |
1988 | while (len < *lenp) { | |
1989 | if (get_user(c, p++)) | |
1990 | return -EFAULT; | |
1991 | if (c == 0 || c == '\n') | |
1992 | break; | |
1993 | len++; | |
1994 | } | |
f5dd3d6f SV |
1995 | if (len >= maxlen) |
1996 | len = maxlen-1; | |
1997 | if(copy_from_user(data, buffer, len)) | |
1da177e4 | 1998 | return -EFAULT; |
f5dd3d6f | 1999 | ((char *) data)[len] = 0; |
1da177e4 LT |
2000 | *ppos += *lenp; |
2001 | } else { | |
f5dd3d6f SV |
2002 | len = strlen(data); |
2003 | if (len > maxlen) | |
2004 | len = maxlen; | |
8d060877 ON |
2005 | |
2006 | if (*ppos > len) { | |
2007 | *lenp = 0; | |
2008 | return 0; | |
2009 | } | |
2010 | ||
2011 | data += *ppos; | |
2012 | len -= *ppos; | |
2013 | ||
1da177e4 LT |
2014 | if (len > *lenp) |
2015 | len = *lenp; | |
2016 | if (len) | |
f5dd3d6f | 2017 | if(copy_to_user(buffer, data, len)) |
1da177e4 LT |
2018 | return -EFAULT; |
2019 | if (len < *lenp) { | |
2020 | if(put_user('\n', ((char __user *) buffer) + len)) | |
2021 | return -EFAULT; | |
2022 | len++; | |
2023 | } | |
2024 | *lenp = len; | |
2025 | *ppos += len; | |
2026 | } | |
2027 | return 0; | |
2028 | } | |
2029 | ||
f5dd3d6f SV |
2030 | /** |
2031 | * proc_dostring - read a string sysctl | |
2032 | * @table: the sysctl table | |
2033 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
2034 | * @buffer: the user buffer |
2035 | * @lenp: the size of the user buffer | |
2036 | * @ppos: file position | |
2037 | * | |
2038 | * Reads/writes a string from/to the user buffer. If the kernel | |
2039 | * buffer provided is not large enough to hold the string, the | |
2040 | * string is truncated. The copied string is %NULL-terminated. | |
2041 | * If the string is being read by the user process, it is copied | |
2042 | * and a newline '\n' is added. It is truncated if the buffer is | |
2043 | * not large enough. | |
2044 | * | |
2045 | * Returns 0 on success. | |
2046 | */ | |
8d65af78 | 2047 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2048 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2049 | { | |
8d65af78 | 2050 | return _proc_do_string(table->data, table->maxlen, write, |
f5dd3d6f SV |
2051 | buffer, lenp, ppos); |
2052 | } | |
2053 | ||
1da177e4 LT |
2054 | |
2055 | static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp, | |
2056 | int *valp, | |
2057 | int write, void *data) | |
2058 | { | |
2059 | if (write) { | |
2060 | *valp = *negp ? -*lvalp : *lvalp; | |
2061 | } else { | |
2062 | int val = *valp; | |
2063 | if (val < 0) { | |
2064 | *negp = -1; | |
2065 | *lvalp = (unsigned long)-val; | |
2066 | } else { | |
2067 | *negp = 0; | |
2068 | *lvalp = (unsigned long)val; | |
2069 | } | |
2070 | } | |
2071 | return 0; | |
2072 | } | |
2073 | ||
d8217f07 | 2074 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2075 | int write, void __user *buffer, |
fcfbd547 | 2076 | size_t *lenp, loff_t *ppos, |
1da177e4 LT |
2077 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, |
2078 | int write, void *data), | |
2079 | void *data) | |
2080 | { | |
2081 | #define TMPBUFLEN 21 | |
7338f299 | 2082 | int *i, vleft, first = 1, neg; |
1da177e4 LT |
2083 | unsigned long lval; |
2084 | size_t left, len; | |
2085 | ||
2086 | char buf[TMPBUFLEN], *p; | |
2087 | char __user *s = buffer; | |
2088 | ||
fcfbd547 | 2089 | if (!tbl_data || !table->maxlen || !*lenp || |
1da177e4 LT |
2090 | (*ppos && !write)) { |
2091 | *lenp = 0; | |
2092 | return 0; | |
2093 | } | |
2094 | ||
fcfbd547 | 2095 | i = (int *) tbl_data; |
1da177e4 LT |
2096 | vleft = table->maxlen / sizeof(*i); |
2097 | left = *lenp; | |
2098 | ||
2099 | if (!conv) | |
2100 | conv = do_proc_dointvec_conv; | |
2101 | ||
2102 | for (; left && vleft--; i++, first=0) { | |
2103 | if (write) { | |
2104 | while (left) { | |
2105 | char c; | |
2106 | if (get_user(c, s)) | |
2107 | return -EFAULT; | |
2108 | if (!isspace(c)) | |
2109 | break; | |
2110 | left--; | |
2111 | s++; | |
2112 | } | |
2113 | if (!left) | |
2114 | break; | |
2115 | neg = 0; | |
2116 | len = left; | |
2117 | if (len > sizeof(buf) - 1) | |
2118 | len = sizeof(buf) - 1; | |
2119 | if (copy_from_user(buf, s, len)) | |
2120 | return -EFAULT; | |
2121 | buf[len] = 0; | |
2122 | p = buf; | |
2123 | if (*p == '-' && left > 1) { | |
2124 | neg = 1; | |
bd9b0bac | 2125 | p++; |
1da177e4 LT |
2126 | } |
2127 | if (*p < '0' || *p > '9') | |
2128 | break; | |
2129 | ||
2130 | lval = simple_strtoul(p, &p, 0); | |
2131 | ||
2132 | len = p-buf; | |
2133 | if ((len < left) && *p && !isspace(*p)) | |
2134 | break; | |
1da177e4 LT |
2135 | s += len; |
2136 | left -= len; | |
2137 | ||
2138 | if (conv(&neg, &lval, i, 1, data)) | |
2139 | break; | |
2140 | } else { | |
2141 | p = buf; | |
2142 | if (!first) | |
2143 | *p++ = '\t'; | |
2144 | ||
2145 | if (conv(&neg, &lval, i, 0, data)) | |
2146 | break; | |
2147 | ||
2148 | sprintf(p, "%s%lu", neg ? "-" : "", lval); | |
2149 | len = strlen(buf); | |
2150 | if (len > left) | |
2151 | len = left; | |
2152 | if(copy_to_user(s, buf, len)) | |
2153 | return -EFAULT; | |
2154 | left -= len; | |
2155 | s += len; | |
2156 | } | |
2157 | } | |
2158 | ||
2159 | if (!write && !first && left) { | |
2160 | if(put_user('\n', s)) | |
2161 | return -EFAULT; | |
2162 | left--, s++; | |
2163 | } | |
2164 | if (write) { | |
2165 | while (left) { | |
2166 | char c; | |
2167 | if (get_user(c, s++)) | |
2168 | return -EFAULT; | |
2169 | if (!isspace(c)) | |
2170 | break; | |
2171 | left--; | |
2172 | } | |
2173 | } | |
2174 | if (write && first) | |
2175 | return -EINVAL; | |
2176 | *lenp -= left; | |
2177 | *ppos += *lenp; | |
2178 | return 0; | |
2179 | #undef TMPBUFLEN | |
2180 | } | |
2181 | ||
8d65af78 | 2182 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 KK |
2183 | void __user *buffer, size_t *lenp, loff_t *ppos, |
2184 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, | |
2185 | int write, void *data), | |
2186 | void *data) | |
2187 | { | |
8d65af78 | 2188 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2189 | buffer, lenp, ppos, conv, data); |
2190 | } | |
2191 | ||
1da177e4 LT |
2192 | /** |
2193 | * proc_dointvec - read a vector of integers | |
2194 | * @table: the sysctl table | |
2195 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2196 | * @buffer: the user buffer |
2197 | * @lenp: the size of the user buffer | |
2198 | * @ppos: file position | |
2199 | * | |
2200 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2201 | * values from/to the user buffer, treated as an ASCII string. | |
2202 | * | |
2203 | * Returns 0 on success. | |
2204 | */ | |
8d65af78 | 2205 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2206 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2207 | { | |
8d65af78 | 2208 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2209 | NULL,NULL); |
2210 | } | |
2211 | ||
34f5a398 | 2212 | /* |
25ddbb18 AK |
2213 | * Taint values can only be increased |
2214 | * This means we can safely use a temporary. | |
34f5a398 | 2215 | */ |
8d65af78 | 2216 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2217 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2218 | { | |
25ddbb18 AK |
2219 | struct ctl_table t; |
2220 | unsigned long tmptaint = get_taint(); | |
2221 | int err; | |
34f5a398 | 2222 | |
91fcd412 | 2223 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2224 | return -EPERM; |
2225 | ||
25ddbb18 AK |
2226 | t = *table; |
2227 | t.data = &tmptaint; | |
8d65af78 | 2228 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2229 | if (err < 0) |
2230 | return err; | |
2231 | ||
2232 | if (write) { | |
2233 | /* | |
2234 | * Poor man's atomic or. Not worth adding a primitive | |
2235 | * to everyone's atomic.h for this | |
2236 | */ | |
2237 | int i; | |
2238 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2239 | if ((tmptaint >> i) & 1) | |
2240 | add_taint(i); | |
2241 | } | |
2242 | } | |
2243 | ||
2244 | return err; | |
34f5a398 TT |
2245 | } |
2246 | ||
1da177e4 LT |
2247 | struct do_proc_dointvec_minmax_conv_param { |
2248 | int *min; | |
2249 | int *max; | |
2250 | }; | |
2251 | ||
2252 | static int do_proc_dointvec_minmax_conv(int *negp, unsigned long *lvalp, | |
2253 | int *valp, | |
2254 | int write, void *data) | |
2255 | { | |
2256 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2257 | if (write) { | |
2258 | int val = *negp ? -*lvalp : *lvalp; | |
2259 | if ((param->min && *param->min > val) || | |
2260 | (param->max && *param->max < val)) | |
2261 | return -EINVAL; | |
2262 | *valp = val; | |
2263 | } else { | |
2264 | int val = *valp; | |
2265 | if (val < 0) { | |
2266 | *negp = -1; | |
2267 | *lvalp = (unsigned long)-val; | |
2268 | } else { | |
2269 | *negp = 0; | |
2270 | *lvalp = (unsigned long)val; | |
2271 | } | |
2272 | } | |
2273 | return 0; | |
2274 | } | |
2275 | ||
2276 | /** | |
2277 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2278 | * @table: the sysctl table | |
2279 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2280 | * @buffer: the user buffer |
2281 | * @lenp: the size of the user buffer | |
2282 | * @ppos: file position | |
2283 | * | |
2284 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2285 | * values from/to the user buffer, treated as an ASCII string. | |
2286 | * | |
2287 | * This routine will ensure the values are within the range specified by | |
2288 | * table->extra1 (min) and table->extra2 (max). | |
2289 | * | |
2290 | * Returns 0 on success. | |
2291 | */ | |
8d65af78 | 2292 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2293 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2294 | { | |
2295 | struct do_proc_dointvec_minmax_conv_param param = { | |
2296 | .min = (int *) table->extra1, | |
2297 | .max = (int *) table->extra2, | |
2298 | }; | |
8d65af78 | 2299 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2300 | do_proc_dointvec_minmax_conv, ¶m); |
2301 | } | |
2302 | ||
d8217f07 | 2303 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2304 | void __user *buffer, |
2305 | size_t *lenp, loff_t *ppos, | |
2306 | unsigned long convmul, | |
2307 | unsigned long convdiv) | |
2308 | { | |
2309 | #define TMPBUFLEN 21 | |
2310 | unsigned long *i, *min, *max, val; | |
2311 | int vleft, first=1, neg; | |
2312 | size_t len, left; | |
2313 | char buf[TMPBUFLEN], *p; | |
2314 | char __user *s = buffer; | |
2315 | ||
fcfbd547 | 2316 | if (!data || !table->maxlen || !*lenp || |
1da177e4 LT |
2317 | (*ppos && !write)) { |
2318 | *lenp = 0; | |
2319 | return 0; | |
2320 | } | |
2321 | ||
fcfbd547 | 2322 | i = (unsigned long *) data; |
1da177e4 LT |
2323 | min = (unsigned long *) table->extra1; |
2324 | max = (unsigned long *) table->extra2; | |
2325 | vleft = table->maxlen / sizeof(unsigned long); | |
2326 | left = *lenp; | |
2327 | ||
2328 | for (; left && vleft--; i++, min++, max++, first=0) { | |
2329 | if (write) { | |
2330 | while (left) { | |
2331 | char c; | |
2332 | if (get_user(c, s)) | |
2333 | return -EFAULT; | |
2334 | if (!isspace(c)) | |
2335 | break; | |
2336 | left--; | |
2337 | s++; | |
2338 | } | |
2339 | if (!left) | |
2340 | break; | |
2341 | neg = 0; | |
2342 | len = left; | |
2343 | if (len > TMPBUFLEN-1) | |
2344 | len = TMPBUFLEN-1; | |
2345 | if (copy_from_user(buf, s, len)) | |
2346 | return -EFAULT; | |
2347 | buf[len] = 0; | |
2348 | p = buf; | |
2349 | if (*p == '-' && left > 1) { | |
2350 | neg = 1; | |
bd9b0bac | 2351 | p++; |
1da177e4 LT |
2352 | } |
2353 | if (*p < '0' || *p > '9') | |
2354 | break; | |
2355 | val = simple_strtoul(p, &p, 0) * convmul / convdiv ; | |
2356 | len = p-buf; | |
2357 | if ((len < left) && *p && !isspace(*p)) | |
2358 | break; | |
2359 | if (neg) | |
2360 | val = -val; | |
2361 | s += len; | |
2362 | left -= len; | |
2363 | ||
2364 | if(neg) | |
2365 | continue; | |
2366 | if ((min && val < *min) || (max && val > *max)) | |
2367 | continue; | |
2368 | *i = val; | |
2369 | } else { | |
2370 | p = buf; | |
2371 | if (!first) | |
2372 | *p++ = '\t'; | |
2373 | sprintf(p, "%lu", convdiv * (*i) / convmul); | |
2374 | len = strlen(buf); | |
2375 | if (len > left) | |
2376 | len = left; | |
2377 | if(copy_to_user(s, buf, len)) | |
2378 | return -EFAULT; | |
2379 | left -= len; | |
2380 | s += len; | |
2381 | } | |
2382 | } | |
2383 | ||
2384 | if (!write && !first && left) { | |
2385 | if(put_user('\n', s)) | |
2386 | return -EFAULT; | |
2387 | left--, s++; | |
2388 | } | |
2389 | if (write) { | |
2390 | while (left) { | |
2391 | char c; | |
2392 | if (get_user(c, s++)) | |
2393 | return -EFAULT; | |
2394 | if (!isspace(c)) | |
2395 | break; | |
2396 | left--; | |
2397 | } | |
2398 | } | |
2399 | if (write && first) | |
2400 | return -EINVAL; | |
2401 | *lenp -= left; | |
2402 | *ppos += *lenp; | |
2403 | return 0; | |
2404 | #undef TMPBUFLEN | |
2405 | } | |
2406 | ||
d8217f07 | 2407 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2408 | void __user *buffer, |
2409 | size_t *lenp, loff_t *ppos, | |
2410 | unsigned long convmul, | |
2411 | unsigned long convdiv) | |
2412 | { | |
2413 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2414 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2415 | } |
2416 | ||
1da177e4 LT |
2417 | /** |
2418 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2419 | * @table: the sysctl table | |
2420 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2421 | * @buffer: the user buffer |
2422 | * @lenp: the size of the user buffer | |
2423 | * @ppos: file position | |
2424 | * | |
2425 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2426 | * values from/to the user buffer, treated as an ASCII string. | |
2427 | * | |
2428 | * This routine will ensure the values are within the range specified by | |
2429 | * table->extra1 (min) and table->extra2 (max). | |
2430 | * | |
2431 | * Returns 0 on success. | |
2432 | */ | |
8d65af78 | 2433 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2434 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2435 | { | |
8d65af78 | 2436 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2437 | } |
2438 | ||
2439 | /** | |
2440 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2441 | * @table: the sysctl table | |
2442 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2443 | * @buffer: the user buffer |
2444 | * @lenp: the size of the user buffer | |
2445 | * @ppos: file position | |
2446 | * | |
2447 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2448 | * values from/to the user buffer, treated as an ASCII string. The values | |
2449 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2450 | * | |
2451 | * This routine will ensure the values are within the range specified by | |
2452 | * table->extra1 (min) and table->extra2 (max). | |
2453 | * | |
2454 | * Returns 0 on success. | |
2455 | */ | |
d8217f07 | 2456 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2457 | void __user *buffer, |
2458 | size_t *lenp, loff_t *ppos) | |
2459 | { | |
8d65af78 | 2460 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2461 | lenp, ppos, HZ, 1000l); |
2462 | } | |
2463 | ||
2464 | ||
2465 | static int do_proc_dointvec_jiffies_conv(int *negp, unsigned long *lvalp, | |
2466 | int *valp, | |
2467 | int write, void *data) | |
2468 | { | |
2469 | if (write) { | |
cba9f33d BS |
2470 | if (*lvalp > LONG_MAX / HZ) |
2471 | return 1; | |
1da177e4 LT |
2472 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2473 | } else { | |
2474 | int val = *valp; | |
2475 | unsigned long lval; | |
2476 | if (val < 0) { | |
2477 | *negp = -1; | |
2478 | lval = (unsigned long)-val; | |
2479 | } else { | |
2480 | *negp = 0; | |
2481 | lval = (unsigned long)val; | |
2482 | } | |
2483 | *lvalp = lval / HZ; | |
2484 | } | |
2485 | return 0; | |
2486 | } | |
2487 | ||
2488 | static int do_proc_dointvec_userhz_jiffies_conv(int *negp, unsigned long *lvalp, | |
2489 | int *valp, | |
2490 | int write, void *data) | |
2491 | { | |
2492 | if (write) { | |
cba9f33d BS |
2493 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2494 | return 1; | |
1da177e4 LT |
2495 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2496 | } else { | |
2497 | int val = *valp; | |
2498 | unsigned long lval; | |
2499 | if (val < 0) { | |
2500 | *negp = -1; | |
2501 | lval = (unsigned long)-val; | |
2502 | } else { | |
2503 | *negp = 0; | |
2504 | lval = (unsigned long)val; | |
2505 | } | |
2506 | *lvalp = jiffies_to_clock_t(lval); | |
2507 | } | |
2508 | return 0; | |
2509 | } | |
2510 | ||
2511 | static int do_proc_dointvec_ms_jiffies_conv(int *negp, unsigned long *lvalp, | |
2512 | int *valp, | |
2513 | int write, void *data) | |
2514 | { | |
2515 | if (write) { | |
2516 | *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); | |
2517 | } else { | |
2518 | int val = *valp; | |
2519 | unsigned long lval; | |
2520 | if (val < 0) { | |
2521 | *negp = -1; | |
2522 | lval = (unsigned long)-val; | |
2523 | } else { | |
2524 | *negp = 0; | |
2525 | lval = (unsigned long)val; | |
2526 | } | |
2527 | *lvalp = jiffies_to_msecs(lval); | |
2528 | } | |
2529 | return 0; | |
2530 | } | |
2531 | ||
2532 | /** | |
2533 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2534 | * @table: the sysctl table | |
2535 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2536 | * @buffer: the user buffer |
2537 | * @lenp: the size of the user buffer | |
2538 | * @ppos: file position | |
2539 | * | |
2540 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2541 | * values from/to the user buffer, treated as an ASCII string. | |
2542 | * The values read are assumed to be in seconds, and are converted into | |
2543 | * jiffies. | |
2544 | * | |
2545 | * Returns 0 on success. | |
2546 | */ | |
8d65af78 | 2547 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2548 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2549 | { | |
8d65af78 | 2550 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2551 | do_proc_dointvec_jiffies_conv,NULL); |
2552 | } | |
2553 | ||
2554 | /** | |
2555 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2556 | * @table: the sysctl table | |
2557 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2558 | * @buffer: the user buffer |
2559 | * @lenp: the size of the user buffer | |
1e5d5331 | 2560 | * @ppos: pointer to the file position |
1da177e4 LT |
2561 | * |
2562 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2563 | * values from/to the user buffer, treated as an ASCII string. | |
2564 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2565 | * are converted into jiffies. | |
2566 | * | |
2567 | * Returns 0 on success. | |
2568 | */ | |
8d65af78 | 2569 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2570 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2571 | { | |
8d65af78 | 2572 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2573 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2574 | } | |
2575 | ||
2576 | /** | |
2577 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2578 | * @table: the sysctl table | |
2579 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2580 | * @buffer: the user buffer |
2581 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2582 | * @ppos: file position |
2583 | * @ppos: the current position in the file | |
1da177e4 LT |
2584 | * |
2585 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2586 | * values from/to the user buffer, treated as an ASCII string. | |
2587 | * The values read are assumed to be in 1/1000 seconds, and | |
2588 | * are converted into jiffies. | |
2589 | * | |
2590 | * Returns 0 on success. | |
2591 | */ | |
8d65af78 | 2592 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2593 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2594 | { | |
8d65af78 | 2595 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2596 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2597 | } | |
2598 | ||
8d65af78 | 2599 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2600 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2601 | { | |
2602 | struct pid *new_pid; | |
2603 | pid_t tmp; | |
2604 | int r; | |
2605 | ||
6c5f3e7b | 2606 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2607 | |
8d65af78 | 2608 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2609 | lenp, ppos, NULL, NULL); |
2610 | if (r || !write) | |
2611 | return r; | |
2612 | ||
2613 | new_pid = find_get_pid(tmp); | |
2614 | if (!new_pid) | |
2615 | return -ESRCH; | |
2616 | ||
2617 | put_pid(xchg(&cad_pid, new_pid)); | |
2618 | return 0; | |
2619 | } | |
2620 | ||
1da177e4 LT |
2621 | #else /* CONFIG_PROC_FS */ |
2622 | ||
8d65af78 | 2623 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2624 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2625 | { | |
2626 | return -ENOSYS; | |
2627 | } | |
2628 | ||
8d65af78 | 2629 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2630 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2631 | { |
2632 | return -ENOSYS; | |
2633 | } | |
2634 | ||
8d65af78 | 2635 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2636 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2637 | { | |
2638 | return -ENOSYS; | |
2639 | } | |
2640 | ||
8d65af78 | 2641 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2642 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2643 | { | |
2644 | return -ENOSYS; | |
2645 | } | |
2646 | ||
8d65af78 | 2647 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2648 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2649 | { | |
2650 | return -ENOSYS; | |
2651 | } | |
2652 | ||
8d65af78 | 2653 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2654 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2655 | { | |
2656 | return -ENOSYS; | |
2657 | } | |
2658 | ||
8d65af78 | 2659 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2660 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2661 | { | |
2662 | return -ENOSYS; | |
2663 | } | |
2664 | ||
d8217f07 | 2665 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2666 | void __user *buffer, |
2667 | size_t *lenp, loff_t *ppos) | |
2668 | { | |
2669 | return -ENOSYS; | |
2670 | } | |
2671 | ||
2672 | ||
2673 | #endif /* CONFIG_PROC_FS */ | |
2674 | ||
1da177e4 LT |
2675 | /* |
2676 | * No sense putting this after each symbol definition, twice, | |
2677 | * exception granted :-) | |
2678 | */ | |
2679 | EXPORT_SYMBOL(proc_dointvec); | |
2680 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2681 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2682 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2683 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2684 | EXPORT_SYMBOL(proc_dostring); | |
2685 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2686 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); | |
2687 | EXPORT_SYMBOL(register_sysctl_table); | |
29e796fd | 2688 | EXPORT_SYMBOL(register_sysctl_paths); |
1da177e4 | 2689 | EXPORT_SYMBOL(unregister_sysctl_table); |