Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 | 21 | #include <linux/module.h> |
e2e40f2c | 22 | #include <linux/aio.h> |
1da177e4 LT |
23 | #include <linux/mm.h> |
24 | #include <linux/swap.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/sysctl.h> | |
5a04cca6 | 27 | #include <linux/bitmap.h> |
d33ed52d | 28 | #include <linux/signal.h> |
455cd5ab | 29 | #include <linux/printk.h> |
1da177e4 | 30 | #include <linux/proc_fs.h> |
72c2d582 | 31 | #include <linux/security.h> |
1da177e4 | 32 | #include <linux/ctype.h> |
fd4b616b | 33 | #include <linux/kmemleak.h> |
62239ac2 | 34 | #include <linux/fs.h> |
1da177e4 LT |
35 | #include <linux/init.h> |
36 | #include <linux/kernel.h> | |
0296b228 | 37 | #include <linux/kobject.h> |
20380731 | 38 | #include <linux/net.h> |
1da177e4 LT |
39 | #include <linux/sysrq.h> |
40 | #include <linux/highuid.h> | |
41 | #include <linux/writeback.h> | |
3fff4c42 | 42 | #include <linux/ratelimit.h> |
76ab0f53 | 43 | #include <linux/compaction.h> |
1da177e4 | 44 | #include <linux/hugetlb.h> |
1da177e4 | 45 | #include <linux/initrd.h> |
0b77f5bf | 46 | #include <linux/key.h> |
1da177e4 LT |
47 | #include <linux/times.h> |
48 | #include <linux/limits.h> | |
49 | #include <linux/dcache.h> | |
6e006701 | 50 | #include <linux/dnotify.h> |
1da177e4 | 51 | #include <linux/syscalls.h> |
c748e134 | 52 | #include <linux/vmstat.h> |
c255d844 PM |
53 | #include <linux/nfs_fs.h> |
54 | #include <linux/acpi.h> | |
10a0a8d4 | 55 | #include <linux/reboot.h> |
b0fc494f | 56 | #include <linux/ftrace.h> |
cdd6c482 | 57 | #include <linux/perf_event.h> |
b2be84df | 58 | #include <linux/kprobes.h> |
b492e95b | 59 | #include <linux/pipe_fs_i.h> |
8e4228e1 | 60 | #include <linux/oom.h> |
17f60a7d | 61 | #include <linux/kmod.h> |
73efc039 | 62 | #include <linux/capability.h> |
40401530 | 63 | #include <linux/binfmts.h> |
cf4aebc2 | 64 | #include <linux/sched/sysctl.h> |
f7ccbae4 | 65 | #include <linux/sched/coredump.h> |
7984754b | 66 | #include <linux/kexec.h> |
1be7f75d | 67 | #include <linux/bpf.h> |
d2921684 | 68 | #include <linux/mount.h> |
1da177e4 | 69 | |
7c0f6ba6 | 70 | #include <linux/uaccess.h> |
1da177e4 LT |
71 | #include <asm/processor.h> |
72 | ||
29cbc78b AK |
73 | #ifdef CONFIG_X86 |
74 | #include <asm/nmi.h> | |
0741f4d2 | 75 | #include <asm/stacktrace.h> |
6e7c4025 | 76 | #include <asm/io.h> |
29cbc78b | 77 | #endif |
d550bbd4 DH |
78 | #ifdef CONFIG_SPARC |
79 | #include <asm/setup.h> | |
80 | #endif | |
c55b7c3e DY |
81 | #ifdef CONFIG_BSD_PROCESS_ACCT |
82 | #include <linux/acct.h> | |
83 | #endif | |
4f0e056f DY |
84 | #ifdef CONFIG_RT_MUTEXES |
85 | #include <linux/rtmutex.h> | |
86 | #endif | |
2edf5e49 DY |
87 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
88 | #include <linux/lockdep.h> | |
89 | #endif | |
15485a46 DY |
90 | #ifdef CONFIG_CHR_DEV_SG |
91 | #include <scsi/sg.h> | |
92 | #endif | |
29cbc78b | 93 | |
58687acb | 94 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
95 | #include <linux/nmi.h> |
96 | #endif | |
97 | ||
1da177e4 LT |
98 | #if defined(CONFIG_SYSCTL) |
99 | ||
100 | /* External variables not in a header file. */ | |
f9281e90 DM |
101 | #ifdef CONFIG_USB |
102 | int deny_new_usb __read_mostly = 0; | |
103 | EXPORT_SYMBOL(deny_new_usb); | |
104 | #endif | |
d6e71144 | 105 | extern int suid_dumpable; |
046d662f AK |
106 | #ifdef CONFIG_COREDUMP |
107 | extern int core_uses_pid; | |
1da177e4 | 108 | extern char core_pattern[]; |
a293980c | 109 | extern unsigned int core_pipe_limit; |
046d662f | 110 | #endif |
1da177e4 | 111 | extern int pid_max; |
019b711f | 112 | extern int extra_free_kbytes; |
1da177e4 | 113 | extern int pid_max_min, pid_max_max; |
8ad4b1fb | 114 | extern int percpu_pagelist_fraction; |
9745512c | 115 | extern int latencytop_enabled; |
9b80a184 | 116 | extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
117 | #ifndef CONFIG_MMU |
118 | extern int sysctl_nr_trim_pages; | |
119 | #endif | |
1da177e4 | 120 | |
c4f3b63f | 121 | /* Constants used for minimum and maximum */ |
2508ce18 | 122 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f RT |
123 | static int sixty = 60; |
124 | #endif | |
125 | ||
270750db AT |
126 | static int __maybe_unused neg_one = -1; |
127 | ||
c4f3b63f | 128 | static int zero; |
cd5f9a4c LT |
129 | static int __maybe_unused one = 1; |
130 | static int __maybe_unused two = 2; | |
5509a5d2 | 131 | static int __maybe_unused four = 4; |
fc3501d4 | 132 | static unsigned long one_ul = 1; |
1306ff8b | 133 | static unsigned long long_max = LONG_MAX; |
c4f3b63f | 134 | static int one_hundred = 100; |
795ae7a0 | 135 | static int one_thousand = 1000; |
af91322e DY |
136 | #ifdef CONFIG_PRINTK |
137 | static int ten_thousand = 10000; | |
138 | #endif | |
c5dfd78e ACM |
139 | #ifdef CONFIG_PERF_EVENTS |
140 | static int six_hundred_forty_kb = 640 * 1024; | |
141 | #endif | |
c4f3b63f | 142 | |
9e4a5bda AR |
143 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
144 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
145 | ||
1da177e4 LT |
146 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
147 | static int maxolduid = 65535; | |
148 | static int minolduid; | |
149 | ||
150 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 151 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 152 | |
80df2847 LH |
153 | /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */ |
154 | #ifdef CONFIG_DETECT_HUNG_TASK | |
155 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
156 | #endif | |
157 | ||
d14f1729 DY |
158 | #ifdef CONFIG_INOTIFY_USER |
159 | #include <linux/inotify.h> | |
160 | #endif | |
72c57ed5 | 161 | #ifdef CONFIG_SPARC |
1da177e4 LT |
162 | #endif |
163 | ||
164 | #ifdef __hppa__ | |
165 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
166 | #endif |
167 | ||
168 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
169 | extern int unaligned_enabled; |
170 | #endif | |
1da177e4 | 171 | |
d2b176ed | 172 | #ifdef CONFIG_IA64 |
88fc241f | 173 | extern int unaligned_dump_stack; |
d2b176ed JS |
174 | #endif |
175 | ||
b6fca725 VG |
176 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
177 | extern int no_unaligned_warning; | |
178 | #endif | |
179 | ||
d6f8ff73 | 180 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 | 181 | |
a19ac337 LR |
182 | /** |
183 | * enum sysctl_writes_mode - supported sysctl write modes | |
184 | * | |
185 | * @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value | |
186 | * to be written, and multiple writes on the same sysctl file descriptor | |
187 | * will rewrite the sysctl value, regardless of file position. No warning | |
188 | * is issued when the initial position is not 0. | |
189 | * @SYSCTL_WRITES_WARN: same as above but warn when the initial file position is | |
190 | * not 0. | |
191 | * @SYSCTL_WRITES_STRICT: writes to numeric sysctl entries must always be at | |
192 | * file position 0 and the value must be fully contained in the buffer | |
193 | * sent to the write syscall. If dealing with strings respect the file | |
194 | * position, but restrict this to the max length of the buffer, anything | |
195 | * passed the max lenght will be ignored. Multiple writes will append | |
196 | * to the buffer. | |
197 | * | |
198 | * These write modes control how current file position affects the behavior of | |
199 | * updating sysctl values through the proc interface on each write. | |
200 | */ | |
201 | enum sysctl_writes_mode { | |
202 | SYSCTL_WRITES_LEGACY = -1, | |
203 | SYSCTL_WRITES_WARN = 0, | |
204 | SYSCTL_WRITES_STRICT = 1, | |
205 | }; | |
f4aacea2 | 206 | |
a19ac337 | 207 | static enum sysctl_writes_mode sysctl_writes_strict = SYSCTL_WRITES_STRICT; |
f4aacea2 | 208 | |
8d65af78 | 209 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 210 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 211 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 212 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 213 | #endif |
9ec52099 | 214 | |
bfdc0b49 | 215 | #ifdef CONFIG_PRINTK |
620f6e8e | 216 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
217 | void __user *buffer, size_t *lenp, loff_t *ppos); |
218 | #endif | |
219 | ||
54b50199 KC |
220 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
221 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 222 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
223 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
224 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 225 | #endif |
54b50199 | 226 | |
97f5f0cd | 227 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 | 228 | /* Note: sysrq code uses it's own private copy */ |
8eaede49 | 229 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd | 230 | |
6f8fd1d7 | 231 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, |
97f5f0cd DT |
232 | void __user *buffer, size_t *lenp, |
233 | loff_t *ppos) | |
234 | { | |
235 | int error; | |
236 | ||
237 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
238 | if (error) | |
239 | return error; | |
240 | ||
241 | if (write) | |
242 | sysrq_toggle_support(__sysrq_enabled); | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | #endif | |
248 | ||
d8217f07 EB |
249 | static struct ctl_table kern_table[]; |
250 | static struct ctl_table vm_table[]; | |
251 | static struct ctl_table fs_table[]; | |
252 | static struct ctl_table debug_table[]; | |
253 | static struct ctl_table dev_table[]; | |
254 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
255 | #ifdef CONFIG_EPOLL |
256 | extern struct ctl_table epoll_table[]; | |
257 | #endif | |
1da177e4 LT |
258 | |
259 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
260 | int sysctl_legacy_va_layout; | |
261 | #endif | |
262 | ||
1da177e4 LT |
263 | /* The default sysctl tables: */ |
264 | ||
de4e83bd | 265 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 266 | { |
1da177e4 LT |
267 | .procname = "kernel", |
268 | .mode = 0555, | |
269 | .child = kern_table, | |
270 | }, | |
271 | { | |
1da177e4 LT |
272 | .procname = "vm", |
273 | .mode = 0555, | |
274 | .child = vm_table, | |
275 | }, | |
1da177e4 | 276 | { |
1da177e4 LT |
277 | .procname = "fs", |
278 | .mode = 0555, | |
279 | .child = fs_table, | |
280 | }, | |
281 | { | |
1da177e4 LT |
282 | .procname = "debug", |
283 | .mode = 0555, | |
284 | .child = debug_table, | |
285 | }, | |
286 | { | |
1da177e4 LT |
287 | .procname = "dev", |
288 | .mode = 0555, | |
289 | .child = dev_table, | |
290 | }, | |
6fce56ec | 291 | { } |
1da177e4 LT |
292 | }; |
293 | ||
77e54a1f | 294 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
295 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
296 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
297 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
298 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 299 | #ifdef CONFIG_SMP |
1983a922 CE |
300 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
301 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
302 | #endif /* CONFIG_SMP */ |
303 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 304 | |
5e771905 MG |
305 | #ifdef CONFIG_COMPACTION |
306 | static int min_extfrag_threshold; | |
307 | static int max_extfrag_threshold = 1000; | |
308 | #endif | |
309 | ||
d8217f07 | 310 | static struct ctl_table kern_table[] = { |
2bba22c5 | 311 | { |
2bba22c5 MG |
312 | .procname = "sched_child_runs_first", |
313 | .data = &sysctl_sched_child_runs_first, | |
314 | .maxlen = sizeof(unsigned int), | |
315 | .mode = 0644, | |
6d456111 | 316 | .proc_handler = proc_dointvec, |
2bba22c5 | 317 | }, |
77e54a1f IM |
318 | #ifdef CONFIG_SCHED_DEBUG |
319 | { | |
b2be5e96 PZ |
320 | .procname = "sched_min_granularity_ns", |
321 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
322 | .maxlen = sizeof(unsigned int), |
323 | .mode = 0644, | |
702a7c76 | 324 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
325 | .extra1 = &min_sched_granularity_ns, |
326 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 327 | }, |
21805085 | 328 | { |
21805085 PZ |
329 | .procname = "sched_latency_ns", |
330 | .data = &sysctl_sched_latency, | |
331 | .maxlen = sizeof(unsigned int), | |
332 | .mode = 0644, | |
702a7c76 | 333 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
334 | .extra1 = &min_sched_granularity_ns, |
335 | .extra2 = &max_sched_granularity_ns, | |
336 | }, | |
0bb35550 SV |
337 | #ifdef CONFIG_SCHED_WALT |
338 | { | |
339 | .procname = "sched_use_walt_cpu_util", | |
340 | .data = &sysctl_sched_use_walt_cpu_util, | |
341 | .maxlen = sizeof(unsigned int), | |
342 | .mode = 0644, | |
343 | .proc_handler = proc_dointvec, | |
344 | }, | |
345 | { | |
346 | .procname = "sched_use_walt_task_util", | |
347 | .data = &sysctl_sched_use_walt_task_util, | |
348 | .maxlen = sizeof(unsigned int), | |
349 | .mode = 0644, | |
350 | .proc_handler = proc_dointvec, | |
351 | }, | |
352 | { | |
353 | .procname = "sched_walt_init_task_load_pct", | |
354 | .data = &sysctl_sched_walt_init_task_load_pct, | |
355 | .maxlen = sizeof(unsigned int), | |
356 | .mode = 0644, | |
357 | .proc_handler = proc_dointvec, | |
358 | }, | |
359 | { | |
360 | .procname = "sched_walt_cpu_high_irqload", | |
361 | .data = &sysctl_sched_walt_cpu_high_irqload, | |
362 | .maxlen = sizeof(unsigned int), | |
363 | .mode = 0644, | |
364 | .proc_handler = proc_dointvec, | |
365 | }, | |
366 | #endif | |
f1ec666a CR |
367 | { |
368 | .procname = "sched_sync_hint_enable", | |
369 | .data = &sysctl_sched_sync_hint_enable, | |
370 | .maxlen = sizeof(unsigned int), | |
371 | .mode = 0644, | |
372 | .proc_handler = proc_dointvec, | |
373 | }, | |
7f6fb825 SS |
374 | { |
375 | .procname = "sched_cstate_aware", | |
376 | .data = &sysctl_sched_cstate_aware, | |
377 | .maxlen = sizeof(unsigned int), | |
378 | .mode = 0644, | |
379 | .proc_handler = proc_dointvec, | |
380 | }, | |
77e54a1f | 381 | { |
77e54a1f IM |
382 | .procname = "sched_wakeup_granularity_ns", |
383 | .data = &sysctl_sched_wakeup_granularity, | |
384 | .maxlen = sizeof(unsigned int), | |
385 | .mode = 0644, | |
702a7c76 | 386 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
387 | .extra1 = &min_wakeup_granularity_ns, |
388 | .extra2 = &max_wakeup_granularity_ns, | |
389 | }, | |
cbee9f88 | 390 | #ifdef CONFIG_SMP |
1983a922 | 391 | { |
1983a922 CE |
392 | .procname = "sched_tunable_scaling", |
393 | .data = &sysctl_sched_tunable_scaling, | |
394 | .maxlen = sizeof(enum sched_tunable_scaling), | |
395 | .mode = 0644, | |
702a7c76 | 396 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
397 | .extra1 = &min_sched_tunable_scaling, |
398 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 399 | }, |
da84d961 | 400 | { |
d00535db | 401 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
402 | .data = &sysctl_sched_migration_cost, |
403 | .maxlen = sizeof(unsigned int), | |
404 | .mode = 0644, | |
6d456111 | 405 | .proc_handler = proc_dointvec, |
da84d961 | 406 | }, |
b82d9fdd | 407 | { |
b82d9fdd PZ |
408 | .procname = "sched_nr_migrate", |
409 | .data = &sysctl_sched_nr_migrate, | |
410 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 411 | .mode = 0644, |
6d456111 | 412 | .proc_handler = proc_dointvec, |
fa85ae24 | 413 | }, |
e9e9250b | 414 | { |
d00535db | 415 | .procname = "sched_time_avg_ms", |
e9e9250b PZ |
416 | .data = &sysctl_sched_time_avg, |
417 | .maxlen = sizeof(unsigned int), | |
418 | .mode = 0644, | |
5ccba44b EZ |
419 | .proc_handler = proc_dointvec_minmax, |
420 | .extra1 = &one, | |
e9e9250b | 421 | }, |
cb251765 MG |
422 | #ifdef CONFIG_SCHEDSTATS |
423 | { | |
424 | .procname = "sched_schedstats", | |
425 | .data = NULL, | |
426 | .maxlen = sizeof(unsigned int), | |
427 | .mode = 0644, | |
428 | .proc_handler = sysctl_schedstats, | |
429 | .extra1 = &zero, | |
430 | .extra2 = &one, | |
431 | }, | |
432 | #endif /* CONFIG_SCHEDSTATS */ | |
cbee9f88 PZ |
433 | #endif /* CONFIG_SMP */ |
434 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
435 | { |
436 | .procname = "numa_balancing_scan_delay_ms", | |
437 | .data = &sysctl_numa_balancing_scan_delay, | |
438 | .maxlen = sizeof(unsigned int), | |
439 | .mode = 0644, | |
440 | .proc_handler = proc_dointvec, | |
441 | }, | |
cbee9f88 PZ |
442 | { |
443 | .procname = "numa_balancing_scan_period_min_ms", | |
444 | .data = &sysctl_numa_balancing_scan_period_min, | |
445 | .maxlen = sizeof(unsigned int), | |
446 | .mode = 0644, | |
447 | .proc_handler = proc_dointvec, | |
448 | }, | |
449 | { | |
450 | .procname = "numa_balancing_scan_period_max_ms", | |
451 | .data = &sysctl_numa_balancing_scan_period_max, | |
452 | .maxlen = sizeof(unsigned int), | |
453 | .mode = 0644, | |
454 | .proc_handler = proc_dointvec, | |
455 | }, | |
6e5fb223 PZ |
456 | { |
457 | .procname = "numa_balancing_scan_size_mb", | |
458 | .data = &sysctl_numa_balancing_scan_size, | |
459 | .maxlen = sizeof(unsigned int), | |
460 | .mode = 0644, | |
64192658 KT |
461 | .proc_handler = proc_dointvec_minmax, |
462 | .extra1 = &one, | |
6e5fb223 | 463 | }, |
54a43d54 AK |
464 | { |
465 | .procname = "numa_balancing", | |
466 | .data = NULL, /* filled in by handler */ | |
467 | .maxlen = sizeof(unsigned int), | |
468 | .mode = 0644, | |
469 | .proc_handler = sysctl_numa_balancing, | |
470 | .extra1 = &zero, | |
471 | .extra2 = &one, | |
472 | }, | |
cbee9f88 PZ |
473 | #endif /* CONFIG_NUMA_BALANCING */ |
474 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 475 | { |
9f0c1e56 PZ |
476 | .procname = "sched_rt_period_us", |
477 | .data = &sysctl_sched_rt_period, | |
478 | .maxlen = sizeof(unsigned int), | |
479 | .mode = 0644, | |
6d456111 | 480 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
481 | }, |
482 | { | |
9f0c1e56 PZ |
483 | .procname = "sched_rt_runtime_us", |
484 | .data = &sysctl_sched_rt_runtime, | |
485 | .maxlen = sizeof(int), | |
486 | .mode = 0644, | |
6d456111 | 487 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 488 | }, |
ce0dbbbb CW |
489 | { |
490 | .procname = "sched_rr_timeslice_ms", | |
975e155e | 491 | .data = &sysctl_sched_rr_timeslice, |
ce0dbbbb CW |
492 | .maxlen = sizeof(int), |
493 | .mode = 0644, | |
494 | .proc_handler = sched_rr_handler, | |
495 | }, | |
5091faa4 MG |
496 | #ifdef CONFIG_SCHED_AUTOGROUP |
497 | { | |
498 | .procname = "sched_autogroup_enabled", | |
499 | .data = &sysctl_sched_autogroup_enabled, | |
500 | .maxlen = sizeof(unsigned int), | |
501 | .mode = 0644, | |
1747b21f | 502 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
503 | .extra1 = &zero, |
504 | .extra2 = &one, | |
505 | }, | |
506 | #endif | |
ec12cb7f PT |
507 | #ifdef CONFIG_CFS_BANDWIDTH |
508 | { | |
509 | .procname = "sched_cfs_bandwidth_slice_us", | |
510 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
511 | .maxlen = sizeof(unsigned int), | |
512 | .mode = 0644, | |
513 | .proc_handler = proc_dointvec_minmax, | |
514 | .extra1 = &one, | |
515 | }, | |
516 | #endif | |
f20786ff PZ |
517 | #ifdef CONFIG_PROVE_LOCKING |
518 | { | |
f20786ff PZ |
519 | .procname = "prove_locking", |
520 | .data = &prove_locking, | |
521 | .maxlen = sizeof(int), | |
522 | .mode = 0644, | |
6d456111 | 523 | .proc_handler = proc_dointvec, |
f20786ff PZ |
524 | }, |
525 | #endif | |
526 | #ifdef CONFIG_LOCK_STAT | |
527 | { | |
f20786ff PZ |
528 | .procname = "lock_stat", |
529 | .data = &lock_stat, | |
530 | .maxlen = sizeof(int), | |
531 | .mode = 0644, | |
6d456111 | 532 | .proc_handler = proc_dointvec, |
f20786ff | 533 | }, |
77e54a1f | 534 | #endif |
1da177e4 | 535 | { |
1da177e4 LT |
536 | .procname = "panic", |
537 | .data = &panic_timeout, | |
538 | .maxlen = sizeof(int), | |
539 | .mode = 0644, | |
6d456111 | 540 | .proc_handler = proc_dointvec, |
1da177e4 | 541 | }, |
046d662f | 542 | #ifdef CONFIG_COREDUMP |
1da177e4 | 543 | { |
1da177e4 LT |
544 | .procname = "core_uses_pid", |
545 | .data = &core_uses_pid, | |
546 | .maxlen = sizeof(int), | |
547 | .mode = 0644, | |
6d456111 | 548 | .proc_handler = proc_dointvec, |
1da177e4 LT |
549 | }, |
550 | { | |
1da177e4 LT |
551 | .procname = "core_pattern", |
552 | .data = core_pattern, | |
71ce92f3 | 553 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 554 | .mode = 0644, |
54b50199 | 555 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 556 | }, |
a293980c | 557 | { |
a293980c NH |
558 | .procname = "core_pipe_limit", |
559 | .data = &core_pipe_limit, | |
560 | .maxlen = sizeof(unsigned int), | |
561 | .mode = 0644, | |
6d456111 | 562 | .proc_handler = proc_dointvec, |
a293980c | 563 | }, |
046d662f | 564 | #endif |
34f5a398 | 565 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 566 | { |
1da177e4 | 567 | .procname = "tainted", |
25ddbb18 | 568 | .maxlen = sizeof(long), |
34f5a398 | 569 | .mode = 0644, |
6d456111 | 570 | .proc_handler = proc_taint, |
1da177e4 | 571 | }, |
f4aacea2 KC |
572 | { |
573 | .procname = "sysctl_writes_strict", | |
574 | .data = &sysctl_writes_strict, | |
575 | .maxlen = sizeof(int), | |
576 | .mode = 0644, | |
577 | .proc_handler = proc_dointvec_minmax, | |
578 | .extra1 = &neg_one, | |
579 | .extra2 = &one, | |
580 | }, | |
34f5a398 | 581 | #endif |
9745512c AV |
582 | #ifdef CONFIG_LATENCYTOP |
583 | { | |
584 | .procname = "latencytop", | |
585 | .data = &latencytop_enabled, | |
586 | .maxlen = sizeof(int), | |
587 | .mode = 0644, | |
cb251765 | 588 | .proc_handler = sysctl_latencytop, |
9745512c AV |
589 | }, |
590 | #endif | |
1da177e4 LT |
591 | #ifdef CONFIG_BLK_DEV_INITRD |
592 | { | |
1da177e4 LT |
593 | .procname = "real-root-dev", |
594 | .data = &real_root_dev, | |
595 | .maxlen = sizeof(int), | |
596 | .mode = 0644, | |
6d456111 | 597 | .proc_handler = proc_dointvec, |
1da177e4 LT |
598 | }, |
599 | #endif | |
45807a1d | 600 | { |
45807a1d IM |
601 | .procname = "print-fatal-signals", |
602 | .data = &print_fatal_signals, | |
603 | .maxlen = sizeof(int), | |
604 | .mode = 0644, | |
6d456111 | 605 | .proc_handler = proc_dointvec, |
45807a1d | 606 | }, |
72c57ed5 | 607 | #ifdef CONFIG_SPARC |
1da177e4 | 608 | { |
1da177e4 LT |
609 | .procname = "reboot-cmd", |
610 | .data = reboot_command, | |
611 | .maxlen = 256, | |
612 | .mode = 0644, | |
6d456111 | 613 | .proc_handler = proc_dostring, |
1da177e4 LT |
614 | }, |
615 | { | |
1da177e4 LT |
616 | .procname = "stop-a", |
617 | .data = &stop_a_enabled, | |
618 | .maxlen = sizeof (int), | |
619 | .mode = 0644, | |
6d456111 | 620 | .proc_handler = proc_dointvec, |
1da177e4 LT |
621 | }, |
622 | { | |
1da177e4 LT |
623 | .procname = "scons-poweroff", |
624 | .data = &scons_pwroff, | |
625 | .maxlen = sizeof (int), | |
626 | .mode = 0644, | |
6d456111 | 627 | .proc_handler = proc_dointvec, |
1da177e4 LT |
628 | }, |
629 | #endif | |
0871420f DM |
630 | #ifdef CONFIG_SPARC64 |
631 | { | |
0871420f DM |
632 | .procname = "tsb-ratio", |
633 | .data = &sysctl_tsb_ratio, | |
634 | .maxlen = sizeof (int), | |
635 | .mode = 0644, | |
6d456111 | 636 | .proc_handler = proc_dointvec, |
0871420f DM |
637 | }, |
638 | #endif | |
1da177e4 LT |
639 | #ifdef __hppa__ |
640 | { | |
1da177e4 LT |
641 | .procname = "soft-power", |
642 | .data = &pwrsw_enabled, | |
643 | .maxlen = sizeof (int), | |
644 | .mode = 0644, | |
6d456111 | 645 | .proc_handler = proc_dointvec, |
1da177e4 | 646 | }, |
bf14e3b9 VG |
647 | #endif |
648 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 649 | { |
1da177e4 LT |
650 | .procname = "unaligned-trap", |
651 | .data = &unaligned_enabled, | |
652 | .maxlen = sizeof (int), | |
653 | .mode = 0644, | |
6d456111 | 654 | .proc_handler = proc_dointvec, |
1da177e4 LT |
655 | }, |
656 | #endif | |
657 | { | |
1da177e4 LT |
658 | .procname = "ctrl-alt-del", |
659 | .data = &C_A_D, | |
660 | .maxlen = sizeof(int), | |
661 | .mode = 0644, | |
6d456111 | 662 | .proc_handler = proc_dointvec, |
1da177e4 | 663 | }, |
606576ce | 664 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 665 | { |
b0fc494f SR |
666 | .procname = "ftrace_enabled", |
667 | .data = &ftrace_enabled, | |
668 | .maxlen = sizeof(int), | |
669 | .mode = 0644, | |
6d456111 | 670 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
671 | }, |
672 | #endif | |
f38f1d2a SR |
673 | #ifdef CONFIG_STACK_TRACER |
674 | { | |
f38f1d2a SR |
675 | .procname = "stack_tracer_enabled", |
676 | .data = &stack_tracer_enabled, | |
677 | .maxlen = sizeof(int), | |
678 | .mode = 0644, | |
6d456111 | 679 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
680 | }, |
681 | #endif | |
944ac425 SR |
682 | #ifdef CONFIG_TRACING |
683 | { | |
3299b4dd | 684 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
685 | .data = &ftrace_dump_on_oops, |
686 | .maxlen = sizeof(int), | |
687 | .mode = 0644, | |
6d456111 | 688 | .proc_handler = proc_dointvec, |
944ac425 | 689 | }, |
de7edd31 SRRH |
690 | { |
691 | .procname = "traceoff_on_warning", | |
692 | .data = &__disable_trace_on_warning, | |
693 | .maxlen = sizeof(__disable_trace_on_warning), | |
694 | .mode = 0644, | |
695 | .proc_handler = proc_dointvec, | |
696 | }, | |
0daa2302 SRRH |
697 | { |
698 | .procname = "tracepoint_printk", | |
699 | .data = &tracepoint_printk, | |
700 | .maxlen = sizeof(tracepoint_printk), | |
701 | .mode = 0644, | |
42391745 | 702 | .proc_handler = tracepoint_printk_sysctl, |
0daa2302 | 703 | }, |
944ac425 | 704 | #endif |
2965faa5 | 705 | #ifdef CONFIG_KEXEC_CORE |
7984754b KC |
706 | { |
707 | .procname = "kexec_load_disabled", | |
708 | .data = &kexec_load_disabled, | |
709 | .maxlen = sizeof(int), | |
710 | .mode = 0644, | |
711 | /* only handle a transition from default "0" to "1" */ | |
712 | .proc_handler = proc_dointvec_minmax, | |
713 | .extra1 = &one, | |
714 | .extra2 = &one, | |
715 | }, | |
716 | #endif | |
a1ef5adb | 717 | #ifdef CONFIG_MODULES |
1da177e4 | 718 | { |
1da177e4 LT |
719 | .procname = "modprobe", |
720 | .data = &modprobe_path, | |
721 | .maxlen = KMOD_PATH_LEN, | |
722 | .mode = 0644, | |
6d456111 | 723 | .proc_handler = proc_dostring, |
1da177e4 | 724 | }, |
3d43321b | 725 | { |
3d43321b KC |
726 | .procname = "modules_disabled", |
727 | .data = &modules_disabled, | |
728 | .maxlen = sizeof(int), | |
729 | .mode = 0644, | |
730 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 731 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
732 | .extra1 = &one, |
733 | .extra2 = &one, | |
734 | }, | |
1da177e4 | 735 | #endif |
86d56134 | 736 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 737 | { |
1da177e4 | 738 | .procname = "hotplug", |
312c004d KS |
739 | .data = &uevent_helper, |
740 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 741 | .mode = 0644, |
6d456111 | 742 | .proc_handler = proc_dostring, |
1da177e4 | 743 | }, |
86d56134 | 744 | #endif |
1da177e4 LT |
745 | #ifdef CONFIG_CHR_DEV_SG |
746 | { | |
1da177e4 LT |
747 | .procname = "sg-big-buff", |
748 | .data = &sg_big_buff, | |
749 | .maxlen = sizeof (int), | |
750 | .mode = 0444, | |
6d456111 | 751 | .proc_handler = proc_dointvec, |
1da177e4 LT |
752 | }, |
753 | #endif | |
754 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
755 | { | |
1da177e4 LT |
756 | .procname = "acct", |
757 | .data = &acct_parm, | |
758 | .maxlen = 3*sizeof(int), | |
759 | .mode = 0644, | |
6d456111 | 760 | .proc_handler = proc_dointvec, |
1da177e4 LT |
761 | }, |
762 | #endif | |
1da177e4 LT |
763 | #ifdef CONFIG_MAGIC_SYSRQ |
764 | { | |
1da177e4 | 765 | .procname = "sysrq", |
5d6f647f | 766 | .data = &__sysrq_enabled, |
1da177e4 LT |
767 | .maxlen = sizeof (int), |
768 | .mode = 0644, | |
97f5f0cd | 769 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
770 | }, |
771 | #endif | |
d6f8ff73 | 772 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 773 | { |
1da177e4 | 774 | .procname = "cad_pid", |
9ec52099 | 775 | .data = NULL, |
1da177e4 LT |
776 | .maxlen = sizeof (int), |
777 | .mode = 0600, | |
6d456111 | 778 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 779 | }, |
d6f8ff73 | 780 | #endif |
1da177e4 | 781 | { |
1da177e4 | 782 | .procname = "threads-max", |
16db3d3f | 783 | .data = NULL, |
1da177e4 LT |
784 | .maxlen = sizeof(int), |
785 | .mode = 0644, | |
16db3d3f | 786 | .proc_handler = sysctl_max_threads, |
1da177e4 LT |
787 | }, |
788 | { | |
1da177e4 LT |
789 | .procname = "random", |
790 | .mode = 0555, | |
791 | .child = random_table, | |
792 | }, | |
17f60a7d EP |
793 | { |
794 | .procname = "usermodehelper", | |
795 | .mode = 0555, | |
796 | .child = usermodehelper_table, | |
797 | }, | |
1da177e4 | 798 | { |
1da177e4 LT |
799 | .procname = "overflowuid", |
800 | .data = &overflowuid, | |
801 | .maxlen = sizeof(int), | |
802 | .mode = 0644, | |
6d456111 | 803 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
804 | .extra1 = &minolduid, |
805 | .extra2 = &maxolduid, | |
806 | }, | |
807 | { | |
1da177e4 LT |
808 | .procname = "overflowgid", |
809 | .data = &overflowgid, | |
810 | .maxlen = sizeof(int), | |
811 | .mode = 0644, | |
6d456111 | 812 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
813 | .extra1 = &minolduid, |
814 | .extra2 = &maxolduid, | |
815 | }, | |
347a8dc3 | 816 | #ifdef CONFIG_S390 |
1da177e4 LT |
817 | #ifdef CONFIG_MATHEMU |
818 | { | |
1da177e4 LT |
819 | .procname = "ieee_emulation_warnings", |
820 | .data = &sysctl_ieee_emulation_warnings, | |
821 | .maxlen = sizeof(int), | |
822 | .mode = 0644, | |
6d456111 | 823 | .proc_handler = proc_dointvec, |
1da177e4 | 824 | }, |
1da177e4 LT |
825 | #endif |
826 | { | |
1da177e4 | 827 | .procname = "userprocess_debug", |
ab3c68ee | 828 | .data = &show_unhandled_signals, |
1da177e4 LT |
829 | .maxlen = sizeof(int), |
830 | .mode = 0644, | |
6d456111 | 831 | .proc_handler = proc_dointvec, |
1da177e4 LT |
832 | }, |
833 | #endif | |
834 | { | |
1da177e4 LT |
835 | .procname = "pid_max", |
836 | .data = &pid_max, | |
837 | .maxlen = sizeof (int), | |
838 | .mode = 0644, | |
6d456111 | 839 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
840 | .extra1 = &pid_max_min, |
841 | .extra2 = &pid_max_max, | |
842 | }, | |
843 | { | |
1da177e4 LT |
844 | .procname = "panic_on_oops", |
845 | .data = &panic_on_oops, | |
846 | .maxlen = sizeof(int), | |
847 | .mode = 0644, | |
6d456111 | 848 | .proc_handler = proc_dointvec, |
1da177e4 | 849 | }, |
7ef3d2fd JP |
850 | #if defined CONFIG_PRINTK |
851 | { | |
7ef3d2fd JP |
852 | .procname = "printk", |
853 | .data = &console_loglevel, | |
854 | .maxlen = 4*sizeof(int), | |
855 | .mode = 0644, | |
6d456111 | 856 | .proc_handler = proc_dointvec, |
7ef3d2fd | 857 | }, |
1da177e4 | 858 | { |
1da177e4 | 859 | .procname = "printk_ratelimit", |
717115e1 | 860 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
861 | .maxlen = sizeof(int), |
862 | .mode = 0644, | |
6d456111 | 863 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
864 | }, |
865 | { | |
1da177e4 | 866 | .procname = "printk_ratelimit_burst", |
717115e1 | 867 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
868 | .maxlen = sizeof(int), |
869 | .mode = 0644, | |
6d456111 | 870 | .proc_handler = proc_dointvec, |
1da177e4 | 871 | }, |
af91322e | 872 | { |
af91322e DY |
873 | .procname = "printk_delay", |
874 | .data = &printk_delay_msec, | |
875 | .maxlen = sizeof(int), | |
876 | .mode = 0644, | |
6d456111 | 877 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
878 | .extra1 = &zero, |
879 | .extra2 = &ten_thousand, | |
880 | }, | |
750afe7b BP |
881 | { |
882 | .procname = "printk_devkmsg", | |
883 | .data = devkmsg_log_str, | |
884 | .maxlen = DEVKMSG_STR_MAX_SIZE, | |
885 | .mode = 0644, | |
886 | .proc_handler = devkmsg_sysctl_set_loglvl, | |
887 | }, | |
eaf06b24 DR |
888 | { |
889 | .procname = "dmesg_restrict", | |
890 | .data = &dmesg_restrict, | |
891 | .maxlen = sizeof(int), | |
892 | .mode = 0644, | |
620f6e8e | 893 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
894 | .extra1 = &zero, |
895 | .extra2 = &one, | |
896 | }, | |
455cd5ab DR |
897 | { |
898 | .procname = "kptr_restrict", | |
899 | .data = &kptr_restrict, | |
900 | .maxlen = sizeof(int), | |
901 | .mode = 0644, | |
620f6e8e | 902 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
903 | .extra1 = &zero, |
904 | .extra2 = &two, | |
905 | }, | |
df6e61d4 | 906 | #endif |
f9281e90 DM |
907 | |
908 | #ifdef CONFIG_USB | |
909 | { | |
910 | .procname = "deny_new_usb", | |
911 | .data = &deny_new_usb, | |
912 | .maxlen = sizeof(int), | |
913 | .mode = 0644, | |
914 | .proc_handler = proc_dointvec_minmax_sysadmin, | |
915 | .extra1 = &zero, | |
916 | .extra2 = &one, | |
917 | }, | |
918 | #endif | |
1da177e4 | 919 | { |
1da177e4 LT |
920 | .procname = "ngroups_max", |
921 | .data = &ngroups_max, | |
922 | .maxlen = sizeof (int), | |
923 | .mode = 0444, | |
6d456111 | 924 | .proc_handler = proc_dointvec, |
1da177e4 | 925 | }, |
73efc039 DB |
926 | { |
927 | .procname = "cap_last_cap", | |
928 | .data = (void *)&cap_last_cap, | |
929 | .maxlen = sizeof(int), | |
930 | .mode = 0444, | |
931 | .proc_handler = proc_dointvec, | |
932 | }, | |
58687acb | 933 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 934 | { |
58687acb | 935 | .procname = "watchdog", |
7feeb9cd TG |
936 | .data = &watchdog_user_enabled, |
937 | .maxlen = sizeof(int), | |
938 | .mode = 0644, | |
195daf66 | 939 | .proc_handler = proc_watchdog, |
586692a5 MSB |
940 | .extra1 = &zero, |
941 | .extra2 = &one, | |
58687acb DZ |
942 | }, |
943 | { | |
944 | .procname = "watchdog_thresh", | |
586692a5 | 945 | .data = &watchdog_thresh, |
58687acb DZ |
946 | .maxlen = sizeof(int), |
947 | .mode = 0644, | |
195daf66 | 948 | .proc_handler = proc_watchdog_thresh, |
a6572f84 | 949 | .extra1 = &zero, |
58687acb | 950 | .extra2 = &sixty, |
504d7cf1 | 951 | }, |
195daf66 UO |
952 | { |
953 | .procname = "nmi_watchdog", | |
7feeb9cd TG |
954 | .data = &nmi_watchdog_user_enabled, |
955 | .maxlen = sizeof(int), | |
51d4052b | 956 | .mode = NMI_WATCHDOG_SYSCTL_PERM, |
195daf66 UO |
957 | .proc_handler = proc_nmi_watchdog, |
958 | .extra1 = &zero, | |
195daf66 | 959 | .extra2 = &one, |
195daf66 | 960 | }, |
05a4a952 NP |
961 | { |
962 | .procname = "watchdog_cpumask", | |
963 | .data = &watchdog_cpumask_bits, | |
964 | .maxlen = NR_CPUS, | |
965 | .mode = 0644, | |
966 | .proc_handler = proc_watchdog_cpumask, | |
967 | }, | |
968 | #ifdef CONFIG_SOFTLOCKUP_DETECTOR | |
195daf66 UO |
969 | { |
970 | .procname = "soft_watchdog", | |
7feeb9cd TG |
971 | .data = &soft_watchdog_user_enabled, |
972 | .maxlen = sizeof(int), | |
973 | .mode = 0644, | |
195daf66 UO |
974 | .proc_handler = proc_soft_watchdog, |
975 | .extra1 = &zero, | |
976 | .extra2 = &one, | |
977 | }, | |
2508ce18 DZ |
978 | { |
979 | .procname = "softlockup_panic", | |
980 | .data = &softlockup_panic, | |
981 | .maxlen = sizeof(int), | |
982 | .mode = 0644, | |
983 | .proc_handler = proc_dointvec_minmax, | |
984 | .extra1 = &zero, | |
985 | .extra2 = &one, | |
986 | }, | |
05a4a952 | 987 | #ifdef CONFIG_SMP |
ac1f5912 | 988 | { |
05a4a952 NP |
989 | .procname = "softlockup_all_cpu_backtrace", |
990 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
ac1f5912 DZ |
991 | .maxlen = sizeof(int), |
992 | .mode = 0644, | |
993 | .proc_handler = proc_dointvec_minmax, | |
994 | .extra1 = &zero, | |
995 | .extra2 = &one, | |
996 | }, | |
05a4a952 | 997 | #endif /* CONFIG_SMP */ |
ac1f5912 | 998 | #endif |
05a4a952 | 999 | #ifdef CONFIG_HARDLOCKUP_DETECTOR |
ed235875 | 1000 | { |
05a4a952 NP |
1001 | .procname = "hardlockup_panic", |
1002 | .data = &hardlockup_panic, | |
ed235875 AT |
1003 | .maxlen = sizeof(int), |
1004 | .mode = 0644, | |
1005 | .proc_handler = proc_dointvec_minmax, | |
1006 | .extra1 = &zero, | |
1007 | .extra2 = &one, | |
1008 | }, | |
05a4a952 | 1009 | #ifdef CONFIG_SMP |
55537871 JK |
1010 | { |
1011 | .procname = "hardlockup_all_cpu_backtrace", | |
1012 | .data = &sysctl_hardlockup_all_cpu_backtrace, | |
1013 | .maxlen = sizeof(int), | |
1014 | .mode = 0644, | |
1015 | .proc_handler = proc_dointvec_minmax, | |
1016 | .extra1 = &zero, | |
1017 | .extra2 = &one, | |
1018 | }, | |
ed235875 | 1019 | #endif /* CONFIG_SMP */ |
5dc30558 | 1020 | #endif |
05a4a952 NP |
1021 | #endif |
1022 | ||
5dc30558 DZ |
1023 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) |
1024 | { | |
1025 | .procname = "unknown_nmi_panic", | |
1026 | .data = &unknown_nmi_panic, | |
1027 | .maxlen = sizeof (int), | |
1028 | .mode = 0644, | |
1029 | .proc_handler = proc_dointvec, | |
1030 | }, | |
504d7cf1 | 1031 | #endif |
1da177e4 | 1032 | #if defined(CONFIG_X86) |
8da5adda | 1033 | { |
8da5adda DZ |
1034 | .procname = "panic_on_unrecovered_nmi", |
1035 | .data = &panic_on_unrecovered_nmi, | |
1036 | .maxlen = sizeof(int), | |
1037 | .mode = 0644, | |
6d456111 | 1038 | .proc_handler = proc_dointvec, |
8da5adda | 1039 | }, |
5211a242 | 1040 | { |
5211a242 KG |
1041 | .procname = "panic_on_io_nmi", |
1042 | .data = &panic_on_io_nmi, | |
1043 | .maxlen = sizeof(int), | |
1044 | .mode = 0644, | |
6d456111 | 1045 | .proc_handler = proc_dointvec, |
5211a242 | 1046 | }, |
55af7796 MH |
1047 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
1048 | { | |
1049 | .procname = "panic_on_stackoverflow", | |
1050 | .data = &sysctl_panic_on_stackoverflow, | |
1051 | .maxlen = sizeof(int), | |
1052 | .mode = 0644, | |
1053 | .proc_handler = proc_dointvec, | |
1054 | }, | |
1055 | #endif | |
1da177e4 | 1056 | { |
1da177e4 LT |
1057 | .procname = "bootloader_type", |
1058 | .data = &bootloader_type, | |
1059 | .maxlen = sizeof (int), | |
1060 | .mode = 0444, | |
6d456111 | 1061 | .proc_handler = proc_dointvec, |
1da177e4 | 1062 | }, |
5031296c | 1063 | { |
5031296c PA |
1064 | .procname = "bootloader_version", |
1065 | .data = &bootloader_version, | |
1066 | .maxlen = sizeof (int), | |
1067 | .mode = 0444, | |
6d456111 | 1068 | .proc_handler = proc_dointvec, |
5031296c | 1069 | }, |
6e7c4025 | 1070 | { |
6e7c4025 IM |
1071 | .procname = "io_delay_type", |
1072 | .data = &io_delay_type, | |
1073 | .maxlen = sizeof(int), | |
1074 | .mode = 0644, | |
6d456111 | 1075 | .proc_handler = proc_dointvec, |
6e7c4025 | 1076 | }, |
1da177e4 | 1077 | #endif |
7a9166e3 | 1078 | #if defined(CONFIG_MMU) |
1da177e4 | 1079 | { |
1da177e4 LT |
1080 | .procname = "randomize_va_space", |
1081 | .data = &randomize_va_space, | |
1082 | .maxlen = sizeof(int), | |
1083 | .mode = 0644, | |
6d456111 | 1084 | .proc_handler = proc_dointvec, |
1da177e4 | 1085 | }, |
7a9166e3 | 1086 | #endif |
0152fb37 | 1087 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 1088 | { |
951f22d5 MS |
1089 | .procname = "spin_retry", |
1090 | .data = &spin_retry, | |
1091 | .maxlen = sizeof (int), | |
1092 | .mode = 0644, | |
6d456111 | 1093 | .proc_handler = proc_dointvec, |
951f22d5 | 1094 | }, |
c255d844 | 1095 | #endif |
673d5b43 | 1096 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 1097 | { |
c255d844 | 1098 | .procname = "acpi_video_flags", |
77afcf78 | 1099 | .data = &acpi_realmode_flags, |
c255d844 PM |
1100 | .maxlen = sizeof (unsigned long), |
1101 | .mode = 0644, | |
6d456111 | 1102 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 1103 | }, |
d2b176ed | 1104 | #endif |
b6fca725 | 1105 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 1106 | { |
d2b176ed JS |
1107 | .procname = "ignore-unaligned-usertrap", |
1108 | .data = &no_unaligned_warning, | |
1109 | .maxlen = sizeof (int), | |
1110 | .mode = 0644, | |
6d456111 | 1111 | .proc_handler = proc_dointvec, |
d2b176ed | 1112 | }, |
b6fca725 VG |
1113 | #endif |
1114 | #ifdef CONFIG_IA64 | |
88fc241f | 1115 | { |
88fc241f DC |
1116 | .procname = "unaligned-dump-stack", |
1117 | .data = &unaligned_dump_stack, | |
1118 | .maxlen = sizeof (int), | |
1119 | .mode = 0644, | |
6d456111 | 1120 | .proc_handler = proc_dointvec, |
88fc241f | 1121 | }, |
bebfa101 | 1122 | #endif |
e162b39a MSB |
1123 | #ifdef CONFIG_DETECT_HUNG_TASK |
1124 | { | |
e162b39a MSB |
1125 | .procname = "hung_task_panic", |
1126 | .data = &sysctl_hung_task_panic, | |
1127 | .maxlen = sizeof(int), | |
1128 | .mode = 0644, | |
6d456111 | 1129 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
1130 | .extra1 = &zero, |
1131 | .extra2 = &one, | |
1132 | }, | |
82a1fcb9 | 1133 | { |
82a1fcb9 IM |
1134 | .procname = "hung_task_check_count", |
1135 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 1136 | .maxlen = sizeof(int), |
82a1fcb9 | 1137 | .mode = 0644, |
cd64647f LZ |
1138 | .proc_handler = proc_dointvec_minmax, |
1139 | .extra1 = &zero, | |
82a1fcb9 IM |
1140 | }, |
1141 | { | |
82a1fcb9 IM |
1142 | .procname = "hung_task_timeout_secs", |
1143 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1144 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1145 | .mode = 0644, |
6d456111 | 1146 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1147 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
1148 | }, |
1149 | { | |
82a1fcb9 IM |
1150 | .procname = "hung_task_warnings", |
1151 | .data = &sysctl_hung_task_warnings, | |
270750db | 1152 | .maxlen = sizeof(int), |
82a1fcb9 | 1153 | .mode = 0644, |
270750db AT |
1154 | .proc_handler = proc_dointvec_minmax, |
1155 | .extra1 = &neg_one, | |
82a1fcb9 | 1156 | }, |
c4f3b63f | 1157 | #endif |
23f78d4a IM |
1158 | #ifdef CONFIG_RT_MUTEXES |
1159 | { | |
23f78d4a IM |
1160 | .procname = "max_lock_depth", |
1161 | .data = &max_lock_depth, | |
1162 | .maxlen = sizeof(int), | |
1163 | .mode = 0644, | |
6d456111 | 1164 | .proc_handler = proc_dointvec, |
23f78d4a | 1165 | }, |
5096add8 | 1166 | #endif |
10a0a8d4 | 1167 | { |
10a0a8d4 JF |
1168 | .procname = "poweroff_cmd", |
1169 | .data = &poweroff_cmd, | |
1170 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1171 | .mode = 0644, | |
6d456111 | 1172 | .proc_handler = proc_dostring, |
10a0a8d4 | 1173 | }, |
0b77f5bf DH |
1174 | #ifdef CONFIG_KEYS |
1175 | { | |
0b77f5bf DH |
1176 | .procname = "keys", |
1177 | .mode = 0555, | |
1178 | .child = key_sysctls, | |
1179 | }, | |
1180 | #endif | |
cdd6c482 | 1181 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1182 | /* |
1183 | * User-space scripts rely on the existence of this file | |
1184 | * as a feature check for perf_events being enabled. | |
1185 | * | |
1186 | * So it's an ABI, do not remove! | |
1187 | */ | |
1ccd1549 | 1188 | { |
cdd6c482 IM |
1189 | .procname = "perf_event_paranoid", |
1190 | .data = &sysctl_perf_event_paranoid, | |
1191 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1192 | .mode = 0644, |
6d456111 | 1193 | .proc_handler = proc_dointvec, |
1ccd1549 | 1194 | }, |
c5078f78 | 1195 | { |
cdd6c482 IM |
1196 | .procname = "perf_event_mlock_kb", |
1197 | .data = &sysctl_perf_event_mlock, | |
1198 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1199 | .mode = 0644, |
6d456111 | 1200 | .proc_handler = proc_dointvec, |
c5078f78 | 1201 | }, |
a78ac325 | 1202 | { |
cdd6c482 IM |
1203 | .procname = "perf_event_max_sample_rate", |
1204 | .data = &sysctl_perf_event_sample_rate, | |
1205 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1206 | .mode = 0644, |
163ec435 | 1207 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1208 | .extra1 = &one, |
a78ac325 | 1209 | }, |
14c63f17 DH |
1210 | { |
1211 | .procname = "perf_cpu_time_max_percent", | |
1212 | .data = &sysctl_perf_cpu_time_max_percent, | |
1213 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1214 | .mode = 0644, | |
1215 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1216 | .extra1 = &zero, | |
1217 | .extra2 = &one_hundred, | |
1218 | }, | |
c5dfd78e ACM |
1219 | { |
1220 | .procname = "perf_event_max_stack", | |
a831100a | 1221 | .data = &sysctl_perf_event_max_stack, |
c5dfd78e ACM |
1222 | .maxlen = sizeof(sysctl_perf_event_max_stack), |
1223 | .mode = 0644, | |
1224 | .proc_handler = perf_event_max_stack_handler, | |
1225 | .extra1 = &zero, | |
1226 | .extra2 = &six_hundred_forty_kb, | |
1227 | }, | |
c85b0334 ACM |
1228 | { |
1229 | .procname = "perf_event_max_contexts_per_stack", | |
1230 | .data = &sysctl_perf_event_max_contexts_per_stack, | |
1231 | .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack), | |
1232 | .mode = 0644, | |
1233 | .proc_handler = perf_event_max_stack_handler, | |
1234 | .extra1 = &zero, | |
1235 | .extra2 = &one_thousand, | |
1236 | }, | |
cb684b5b | 1237 | #endif |
9e3961a0 PB |
1238 | { |
1239 | .procname = "panic_on_warn", | |
1240 | .data = &panic_on_warn, | |
1241 | .maxlen = sizeof(int), | |
1242 | .mode = 0644, | |
1243 | .proc_handler = proc_dointvec_minmax, | |
1244 | .extra1 = &zero, | |
1245 | .extra2 = &one, | |
1246 | }, | |
bc7a34b8 TG |
1247 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) |
1248 | { | |
1249 | .procname = "timer_migration", | |
1250 | .data = &sysctl_timer_migration, | |
1251 | .maxlen = sizeof(unsigned int), | |
1252 | .mode = 0644, | |
1253 | .proc_handler = timer_migration_handler, | |
b94bf594 MJ |
1254 | .extra1 = &zero, |
1255 | .extra2 = &one, | |
bc7a34b8 | 1256 | }, |
1be7f75d AS |
1257 | #endif |
1258 | #ifdef CONFIG_BPF_SYSCALL | |
1259 | { | |
1260 | .procname = "unprivileged_bpf_disabled", | |
1261 | .data = &sysctl_unprivileged_bpf_disabled, | |
1262 | .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), | |
1263 | .mode = 0644, | |
1264 | /* only handle a transition from default "0" to "1" */ | |
1265 | .proc_handler = proc_dointvec_minmax, | |
1266 | .extra1 = &one, | |
1267 | .extra2 = &one, | |
1268 | }, | |
088e9d25 DBO |
1269 | #endif |
1270 | #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) | |
1271 | { | |
1272 | .procname = "panic_on_rcu_stall", | |
1273 | .data = &sysctl_panic_on_rcu_stall, | |
1274 | .maxlen = sizeof(sysctl_panic_on_rcu_stall), | |
1275 | .mode = 0644, | |
1276 | .proc_handler = proc_dointvec_minmax, | |
1277 | .extra1 = &zero, | |
1278 | .extra2 = &one, | |
1279 | }, | |
bc7a34b8 | 1280 | #endif |
6fce56ec | 1281 | { } |
1da177e4 LT |
1282 | }; |
1283 | ||
d8217f07 | 1284 | static struct ctl_table vm_table[] = { |
1da177e4 | 1285 | { |
1da177e4 LT |
1286 | .procname = "overcommit_memory", |
1287 | .data = &sysctl_overcommit_memory, | |
1288 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1289 | .mode = 0644, | |
cb16e95f PH |
1290 | .proc_handler = proc_dointvec_minmax, |
1291 | .extra1 = &zero, | |
1292 | .extra2 = &two, | |
1da177e4 | 1293 | }, |
fadd8fbd | 1294 | { |
fadd8fbd KH |
1295 | .procname = "panic_on_oom", |
1296 | .data = &sysctl_panic_on_oom, | |
1297 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1298 | .mode = 0644, | |
cb16e95f PH |
1299 | .proc_handler = proc_dointvec_minmax, |
1300 | .extra1 = &zero, | |
1301 | .extra2 = &two, | |
fadd8fbd | 1302 | }, |
fe071d7e | 1303 | { |
fe071d7e DR |
1304 | .procname = "oom_kill_allocating_task", |
1305 | .data = &sysctl_oom_kill_allocating_task, | |
1306 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1307 | .mode = 0644, | |
6d456111 | 1308 | .proc_handler = proc_dointvec, |
fe071d7e | 1309 | }, |
fef1bdd6 | 1310 | { |
fef1bdd6 DR |
1311 | .procname = "oom_dump_tasks", |
1312 | .data = &sysctl_oom_dump_tasks, | |
1313 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1314 | .mode = 0644, | |
6d456111 | 1315 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1316 | }, |
2b3cc5e2 | 1317 | { |
1318 | .procname = "reap_mem_on_sigkill", | |
1319 | .data = &sysctl_reap_mem_on_sigkill, | |
1320 | .maxlen = sizeof(sysctl_reap_mem_on_sigkill), | |
1321 | .mode = 0644, | |
1322 | .proc_handler = proc_dointvec, | |
1323 | }, | |
1da177e4 | 1324 | { |
1da177e4 LT |
1325 | .procname = "overcommit_ratio", |
1326 | .data = &sysctl_overcommit_ratio, | |
1327 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1328 | .mode = 0644, | |
49f0ce5f JM |
1329 | .proc_handler = overcommit_ratio_handler, |
1330 | }, | |
1331 | { | |
1332 | .procname = "overcommit_kbytes", | |
1333 | .data = &sysctl_overcommit_kbytes, | |
1334 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1335 | .mode = 0644, | |
1336 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1337 | }, |
1338 | { | |
1da177e4 LT |
1339 | .procname = "page-cluster", |
1340 | .data = &page_cluster, | |
1341 | .maxlen = sizeof(int), | |
1342 | .mode = 0644, | |
cb16e95f PH |
1343 | .proc_handler = proc_dointvec_minmax, |
1344 | .extra1 = &zero, | |
1da177e4 LT |
1345 | }, |
1346 | { | |
1da177e4 LT |
1347 | .procname = "dirty_background_ratio", |
1348 | .data = &dirty_background_ratio, | |
1349 | .maxlen = sizeof(dirty_background_ratio), | |
1350 | .mode = 0644, | |
6d456111 | 1351 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1352 | .extra1 = &zero, |
1353 | .extra2 = &one_hundred, | |
1354 | }, | |
2da02997 | 1355 | { |
2da02997 DR |
1356 | .procname = "dirty_background_bytes", |
1357 | .data = &dirty_background_bytes, | |
1358 | .maxlen = sizeof(dirty_background_bytes), | |
1359 | .mode = 0644, | |
6d456111 | 1360 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1361 | .extra1 = &one_ul, |
2da02997 | 1362 | }, |
1da177e4 | 1363 | { |
1da177e4 LT |
1364 | .procname = "dirty_ratio", |
1365 | .data = &vm_dirty_ratio, | |
1366 | .maxlen = sizeof(vm_dirty_ratio), | |
1367 | .mode = 0644, | |
6d456111 | 1368 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1369 | .extra1 = &zero, |
1370 | .extra2 = &one_hundred, | |
1371 | }, | |
2da02997 | 1372 | { |
2da02997 DR |
1373 | .procname = "dirty_bytes", |
1374 | .data = &vm_dirty_bytes, | |
1375 | .maxlen = sizeof(vm_dirty_bytes), | |
1376 | .mode = 0644, | |
6d456111 | 1377 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1378 | .extra1 = &dirty_bytes_min, |
2da02997 | 1379 | }, |
1da177e4 | 1380 | { |
1da177e4 | 1381 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1382 | .data = &dirty_writeback_interval, |
1383 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1384 | .mode = 0644, |
6d456111 | 1385 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1386 | }, |
1387 | { | |
1da177e4 | 1388 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1389 | .data = &dirty_expire_interval, |
1390 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1391 | .mode = 0644, |
cb16e95f PH |
1392 | .proc_handler = proc_dointvec_minmax, |
1393 | .extra1 = &zero, | |
1da177e4 | 1394 | }, |
1efff914 TT |
1395 | { |
1396 | .procname = "dirtytime_expire_seconds", | |
1397 | .data = &dirtytime_expire_interval, | |
1398 | .maxlen = sizeof(dirty_expire_interval), | |
1399 | .mode = 0644, | |
1400 | .proc_handler = dirtytime_interval_handler, | |
1401 | .extra1 = &zero, | |
1402 | }, | |
1da177e4 | 1403 | { |
3965c9ae WL |
1404 | .procname = "nr_pdflush_threads", |
1405 | .mode = 0444 /* read-only */, | |
1406 | .proc_handler = pdflush_proc_obsolete, | |
1da177e4 LT |
1407 | }, |
1408 | { | |
1da177e4 LT |
1409 | .procname = "swappiness", |
1410 | .data = &vm_swappiness, | |
1411 | .maxlen = sizeof(vm_swappiness), | |
1412 | .mode = 0644, | |
6d456111 | 1413 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1414 | .extra1 = &zero, |
1415 | .extra2 = &one_hundred, | |
1416 | }, | |
1417 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1418 | { |
1da177e4 | 1419 | .procname = "nr_hugepages", |
e5ff2159 | 1420 | .data = NULL, |
1da177e4 LT |
1421 | .maxlen = sizeof(unsigned long), |
1422 | .mode = 0644, | |
6d456111 | 1423 | .proc_handler = hugetlb_sysctl_handler, |
06808b08 LS |
1424 | }, |
1425 | #ifdef CONFIG_NUMA | |
1426 | { | |
1427 | .procname = "nr_hugepages_mempolicy", | |
1428 | .data = NULL, | |
1429 | .maxlen = sizeof(unsigned long), | |
1430 | .mode = 0644, | |
1431 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
06808b08 LS |
1432 | }, |
1433 | #endif | |
1da177e4 | 1434 | { |
1da177e4 LT |
1435 | .procname = "hugetlb_shm_group", |
1436 | .data = &sysctl_hugetlb_shm_group, | |
1437 | .maxlen = sizeof(gid_t), | |
1438 | .mode = 0644, | |
6d456111 | 1439 | .proc_handler = proc_dointvec, |
1da177e4 | 1440 | }, |
396faf03 | 1441 | { |
396faf03 MG |
1442 | .procname = "hugepages_treat_as_movable", |
1443 | .data = &hugepages_treat_as_movable, | |
1444 | .maxlen = sizeof(int), | |
1445 | .mode = 0644, | |
86cdb465 | 1446 | .proc_handler = proc_dointvec, |
396faf03 | 1447 | }, |
d1c3fb1f | 1448 | { |
d1c3fb1f | 1449 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1450 | .data = NULL, |
1451 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1452 | .mode = 0644, |
6d456111 | 1453 | .proc_handler = hugetlb_overcommit_handler, |
d1c3fb1f | 1454 | }, |
1da177e4 LT |
1455 | #endif |
1456 | { | |
1da177e4 LT |
1457 | .procname = "lowmem_reserve_ratio", |
1458 | .data = &sysctl_lowmem_reserve_ratio, | |
1459 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1460 | .mode = 0644, | |
6d456111 | 1461 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1462 | }, |
9d0243bc | 1463 | { |
9d0243bc AM |
1464 | .procname = "drop_caches", |
1465 | .data = &sysctl_drop_caches, | |
1466 | .maxlen = sizeof(int), | |
1467 | .mode = 0644, | |
1468 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1469 | .extra1 = &one, |
5509a5d2 | 1470 | .extra2 = &four, |
9d0243bc | 1471 | }, |
76ab0f53 MG |
1472 | #ifdef CONFIG_COMPACTION |
1473 | { | |
1474 | .procname = "compact_memory", | |
1475 | .data = &sysctl_compact_memory, | |
1476 | .maxlen = sizeof(int), | |
1477 | .mode = 0200, | |
1478 | .proc_handler = sysctl_compaction_handler, | |
1479 | }, | |
5e771905 MG |
1480 | { |
1481 | .procname = "extfrag_threshold", | |
1482 | .data = &sysctl_extfrag_threshold, | |
1483 | .maxlen = sizeof(int), | |
1484 | .mode = 0644, | |
1485 | .proc_handler = sysctl_extfrag_handler, | |
1486 | .extra1 = &min_extfrag_threshold, | |
1487 | .extra2 = &max_extfrag_threshold, | |
1488 | }, | |
5bbe3547 EM |
1489 | { |
1490 | .procname = "compact_unevictable_allowed", | |
1491 | .data = &sysctl_compact_unevictable_allowed, | |
1492 | .maxlen = sizeof(int), | |
1493 | .mode = 0644, | |
1494 | .proc_handler = proc_dointvec, | |
1495 | .extra1 = &zero, | |
1496 | .extra2 = &one, | |
1497 | }, | |
5e771905 | 1498 | |
76ab0f53 | 1499 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1500 | { |
1da177e4 LT |
1501 | .procname = "min_free_kbytes", |
1502 | .data = &min_free_kbytes, | |
1503 | .maxlen = sizeof(min_free_kbytes), | |
1504 | .mode = 0644, | |
6d456111 | 1505 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1506 | .extra1 = &zero, |
1507 | }, | |
795ae7a0 JW |
1508 | { |
1509 | .procname = "watermark_scale_factor", | |
1510 | .data = &watermark_scale_factor, | |
1511 | .maxlen = sizeof(watermark_scale_factor), | |
1512 | .mode = 0644, | |
1513 | .proc_handler = watermark_scale_factor_sysctl_handler, | |
1514 | .extra1 = &one, | |
1515 | .extra2 = &one_thousand, | |
1516 | }, | |
019b711f RR |
1517 | { |
1518 | .procname = "extra_free_kbytes", | |
1519 | .data = &extra_free_kbytes, | |
1520 | .maxlen = sizeof(extra_free_kbytes), | |
1521 | .mode = 0644, | |
1522 | .proc_handler = min_free_kbytes_sysctl_handler, | |
1523 | .extra1 = &zero, | |
1524 | }, | |
8ad4b1fb | 1525 | { |
8ad4b1fb RS |
1526 | .procname = "percpu_pagelist_fraction", |
1527 | .data = &percpu_pagelist_fraction, | |
1528 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1529 | .mode = 0644, | |
6d456111 | 1530 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1531 | .extra1 = &zero, |
8ad4b1fb | 1532 | }, |
1da177e4 LT |
1533 | #ifdef CONFIG_MMU |
1534 | { | |
1da177e4 LT |
1535 | .procname = "max_map_count", |
1536 | .data = &sysctl_max_map_count, | |
1537 | .maxlen = sizeof(sysctl_max_map_count), | |
1538 | .mode = 0644, | |
3e26120c | 1539 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1540 | .extra1 = &zero, |
1da177e4 | 1541 | }, |
dd8632a1 PM |
1542 | #else |
1543 | { | |
dd8632a1 PM |
1544 | .procname = "nr_trim_pages", |
1545 | .data = &sysctl_nr_trim_pages, | |
1546 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1547 | .mode = 0644, | |
6d456111 | 1548 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1549 | .extra1 = &zero, |
1550 | }, | |
1da177e4 LT |
1551 | #endif |
1552 | { | |
1da177e4 LT |
1553 | .procname = "laptop_mode", |
1554 | .data = &laptop_mode, | |
1555 | .maxlen = sizeof(laptop_mode), | |
1556 | .mode = 0644, | |
6d456111 | 1557 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1558 | }, |
1559 | { | |
1da177e4 LT |
1560 | .procname = "block_dump", |
1561 | .data = &block_dump, | |
1562 | .maxlen = sizeof(block_dump), | |
1563 | .mode = 0644, | |
6d456111 | 1564 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1565 | .extra1 = &zero, |
1566 | }, | |
1567 | { | |
1da177e4 LT |
1568 | .procname = "vfs_cache_pressure", |
1569 | .data = &sysctl_vfs_cache_pressure, | |
1570 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1571 | .mode = 0644, | |
6d456111 | 1572 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1573 | .extra1 = &zero, |
1574 | }, | |
1575 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1576 | { | |
1da177e4 LT |
1577 | .procname = "legacy_va_layout", |
1578 | .data = &sysctl_legacy_va_layout, | |
1579 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1580 | .mode = 0644, | |
6d456111 | 1581 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1582 | .extra1 = &zero, |
1583 | }, | |
1584 | #endif | |
1743660b CL |
1585 | #ifdef CONFIG_NUMA |
1586 | { | |
1743660b | 1587 | .procname = "zone_reclaim_mode", |
a5f5f91d MG |
1588 | .data = &node_reclaim_mode, |
1589 | .maxlen = sizeof(node_reclaim_mode), | |
1743660b | 1590 | .mode = 0644, |
6d456111 | 1591 | .proc_handler = proc_dointvec, |
c84db23c | 1592 | .extra1 = &zero, |
1743660b | 1593 | }, |
9614634f | 1594 | { |
9614634f CL |
1595 | .procname = "min_unmapped_ratio", |
1596 | .data = &sysctl_min_unmapped_ratio, | |
1597 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1598 | .mode = 0644, | |
6d456111 | 1599 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1600 | .extra1 = &zero, |
1601 | .extra2 = &one_hundred, | |
1602 | }, | |
0ff38490 | 1603 | { |
0ff38490 CL |
1604 | .procname = "min_slab_ratio", |
1605 | .data = &sysctl_min_slab_ratio, | |
1606 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1607 | .mode = 0644, | |
6d456111 | 1608 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1609 | .extra1 = &zero, |
1610 | .extra2 = &one_hundred, | |
1611 | }, | |
e6e5494c | 1612 | #endif |
77461ab3 CL |
1613 | #ifdef CONFIG_SMP |
1614 | { | |
77461ab3 CL |
1615 | .procname = "stat_interval", |
1616 | .data = &sysctl_stat_interval, | |
1617 | .maxlen = sizeof(sysctl_stat_interval), | |
1618 | .mode = 0644, | |
6d456111 | 1619 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 | 1620 | }, |
52b6f46b HD |
1621 | { |
1622 | .procname = "stat_refresh", | |
1623 | .data = NULL, | |
1624 | .maxlen = 0, | |
1625 | .mode = 0600, | |
1626 | .proc_handler = vmstat_refresh, | |
1627 | }, | |
77461ab3 | 1628 | #endif |
6e141546 | 1629 | #ifdef CONFIG_MMU |
ed032189 | 1630 | { |
ed032189 | 1631 | .procname = "mmap_min_addr", |
788084ab EP |
1632 | .data = &dac_mmap_min_addr, |
1633 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1634 | .mode = 0644, |
6d456111 | 1635 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1636 | }, |
6e141546 | 1637 | #endif |
f0c0b2b8 KH |
1638 | #ifdef CONFIG_NUMA |
1639 | { | |
f0c0b2b8 KH |
1640 | .procname = "numa_zonelist_order", |
1641 | .data = &numa_zonelist_order, | |
1642 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1643 | .mode = 0644, | |
6d456111 | 1644 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1645 | }, |
1646 | #endif | |
2b8232ce | 1647 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1648 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1649 | { |
e6e5494c | 1650 | .procname = "vdso_enabled", |
3d7ee969 AL |
1651 | #ifdef CONFIG_X86_32 |
1652 | .data = &vdso32_enabled, | |
1653 | .maxlen = sizeof(vdso32_enabled), | |
1654 | #else | |
e6e5494c IM |
1655 | .data = &vdso_enabled, |
1656 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1657 | #endif |
e6e5494c | 1658 | .mode = 0644, |
6d456111 | 1659 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1660 | .extra1 = &zero, |
1661 | }, | |
1da177e4 | 1662 | #endif |
195cf453 BG |
1663 | #ifdef CONFIG_HIGHMEM |
1664 | { | |
195cf453 BG |
1665 | .procname = "highmem_is_dirtyable", |
1666 | .data = &vm_highmem_is_dirtyable, | |
1667 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1668 | .mode = 0644, | |
6d456111 | 1669 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1670 | .extra1 = &zero, |
1671 | .extra2 = &one, | |
1672 | }, | |
1673 | #endif | |
6a46079c AK |
1674 | #ifdef CONFIG_MEMORY_FAILURE |
1675 | { | |
6a46079c AK |
1676 | .procname = "memory_failure_early_kill", |
1677 | .data = &sysctl_memory_failure_early_kill, | |
1678 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1679 | .mode = 0644, | |
6d456111 | 1680 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1681 | .extra1 = &zero, |
1682 | .extra2 = &one, | |
1683 | }, | |
1684 | { | |
6a46079c AK |
1685 | .procname = "memory_failure_recovery", |
1686 | .data = &sysctl_memory_failure_recovery, | |
1687 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1688 | .mode = 0644, | |
6d456111 | 1689 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1690 | .extra1 = &zero, |
1691 | .extra2 = &one, | |
1692 | }, | |
1693 | #endif | |
c9b1d098 AS |
1694 | { |
1695 | .procname = "user_reserve_kbytes", | |
1696 | .data = &sysctl_user_reserve_kbytes, | |
1697 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1698 | .mode = 0644, | |
1699 | .proc_handler = proc_doulongvec_minmax, | |
1700 | }, | |
4eeab4f5 AS |
1701 | { |
1702 | .procname = "admin_reserve_kbytes", | |
1703 | .data = &sysctl_admin_reserve_kbytes, | |
1704 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1705 | .mode = 0644, | |
1706 | .proc_handler = proc_doulongvec_minmax, | |
1707 | }, | |
d07e2259 DC |
1708 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS |
1709 | { | |
1710 | .procname = "mmap_rnd_bits", | |
1711 | .data = &mmap_rnd_bits, | |
1712 | .maxlen = sizeof(mmap_rnd_bits), | |
1713 | .mode = 0600, | |
1714 | .proc_handler = proc_dointvec_minmax, | |
1715 | .extra1 = (void *)&mmap_rnd_bits_min, | |
1716 | .extra2 = (void *)&mmap_rnd_bits_max, | |
1717 | }, | |
1718 | #endif | |
1719 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS | |
1720 | { | |
1721 | .procname = "mmap_rnd_compat_bits", | |
1722 | .data = &mmap_rnd_compat_bits, | |
1723 | .maxlen = sizeof(mmap_rnd_compat_bits), | |
1724 | .mode = 0600, | |
1725 | .proc_handler = proc_dointvec_minmax, | |
1726 | .extra1 = (void *)&mmap_rnd_compat_bits_min, | |
1727 | .extra2 = (void *)&mmap_rnd_compat_bits_max, | |
1728 | }, | |
1729 | #endif | |
6fce56ec | 1730 | { } |
1da177e4 LT |
1731 | }; |
1732 | ||
d8217f07 | 1733 | static struct ctl_table fs_table[] = { |
1da177e4 | 1734 | { |
1da177e4 LT |
1735 | .procname = "inode-nr", |
1736 | .data = &inodes_stat, | |
3942c07c | 1737 | .maxlen = 2*sizeof(long), |
1da177e4 | 1738 | .mode = 0444, |
cffbc8aa | 1739 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1740 | }, |
1741 | { | |
1da177e4 LT |
1742 | .procname = "inode-state", |
1743 | .data = &inodes_stat, | |
3942c07c | 1744 | .maxlen = 7*sizeof(long), |
1da177e4 | 1745 | .mode = 0444, |
cffbc8aa | 1746 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1747 | }, |
1748 | { | |
1da177e4 LT |
1749 | .procname = "file-nr", |
1750 | .data = &files_stat, | |
518de9b3 | 1751 | .maxlen = sizeof(files_stat), |
1da177e4 | 1752 | .mode = 0444, |
6d456111 | 1753 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1754 | }, |
1755 | { | |
1da177e4 LT |
1756 | .procname = "file-max", |
1757 | .data = &files_stat.max_files, | |
518de9b3 | 1758 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1759 | .mode = 0644, |
518de9b3 | 1760 | .proc_handler = proc_doulongvec_minmax, |
1306ff8b CB |
1761 | .extra1 = &zero, |
1762 | .extra2 = &long_max, | |
1da177e4 | 1763 | }, |
9cfe015a | 1764 | { |
9cfe015a ED |
1765 | .procname = "nr_open", |
1766 | .data = &sysctl_nr_open, | |
9b80a184 | 1767 | .maxlen = sizeof(unsigned int), |
9cfe015a | 1768 | .mode = 0644, |
6d456111 | 1769 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1770 | .extra1 = &sysctl_nr_open_min, |
1771 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1772 | }, |
1da177e4 | 1773 | { |
1da177e4 LT |
1774 | .procname = "dentry-state", |
1775 | .data = &dentry_stat, | |
3942c07c | 1776 | .maxlen = 6*sizeof(long), |
1da177e4 | 1777 | .mode = 0444, |
312d3ca8 | 1778 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1779 | }, |
1780 | { | |
1da177e4 LT |
1781 | .procname = "overflowuid", |
1782 | .data = &fs_overflowuid, | |
1783 | .maxlen = sizeof(int), | |
1784 | .mode = 0644, | |
6d456111 | 1785 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1786 | .extra1 = &minolduid, |
1787 | .extra2 = &maxolduid, | |
1788 | }, | |
1789 | { | |
1da177e4 LT |
1790 | .procname = "overflowgid", |
1791 | .data = &fs_overflowgid, | |
1792 | .maxlen = sizeof(int), | |
1793 | .mode = 0644, | |
6d456111 | 1794 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1795 | .extra1 = &minolduid, |
1796 | .extra2 = &maxolduid, | |
1797 | }, | |
bfcd17a6 | 1798 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1799 | { |
1da177e4 LT |
1800 | .procname = "leases-enable", |
1801 | .data = &leases_enable, | |
1802 | .maxlen = sizeof(int), | |
1803 | .mode = 0644, | |
6d456111 | 1804 | .proc_handler = proc_dointvec, |
1da177e4 | 1805 | }, |
bfcd17a6 | 1806 | #endif |
1da177e4 LT |
1807 | #ifdef CONFIG_DNOTIFY |
1808 | { | |
1da177e4 LT |
1809 | .procname = "dir-notify-enable", |
1810 | .data = &dir_notify_enable, | |
1811 | .maxlen = sizeof(int), | |
1812 | .mode = 0644, | |
6d456111 | 1813 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1814 | }, |
1815 | #endif | |
1816 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1817 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1818 | { |
1da177e4 LT |
1819 | .procname = "lease-break-time", |
1820 | .data = &lease_break_time, | |
1821 | .maxlen = sizeof(int), | |
1822 | .mode = 0644, | |
6d456111 | 1823 | .proc_handler = proc_dointvec, |
1da177e4 | 1824 | }, |
bfcd17a6 | 1825 | #endif |
ebf3f09c | 1826 | #ifdef CONFIG_AIO |
1da177e4 | 1827 | { |
1da177e4 LT |
1828 | .procname = "aio-nr", |
1829 | .data = &aio_nr, | |
1830 | .maxlen = sizeof(aio_nr), | |
1831 | .mode = 0444, | |
6d456111 | 1832 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1833 | }, |
1834 | { | |
1da177e4 LT |
1835 | .procname = "aio-max-nr", |
1836 | .data = &aio_max_nr, | |
1837 | .maxlen = sizeof(aio_max_nr), | |
1838 | .mode = 0644, | |
6d456111 | 1839 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1840 | }, |
ebf3f09c | 1841 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1842 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1843 | { |
0399cb08 RL |
1844 | .procname = "inotify", |
1845 | .mode = 0555, | |
1846 | .child = inotify_table, | |
1847 | }, | |
1848 | #endif | |
7ef9964e DL |
1849 | #ifdef CONFIG_EPOLL |
1850 | { | |
1851 | .procname = "epoll", | |
1852 | .mode = 0555, | |
1853 | .child = epoll_table, | |
1854 | }, | |
1855 | #endif | |
1da177e4 | 1856 | #endif |
800179c9 KC |
1857 | { |
1858 | .procname = "protected_symlinks", | |
1859 | .data = &sysctl_protected_symlinks, | |
1860 | .maxlen = sizeof(int), | |
1861 | .mode = 0600, | |
1862 | .proc_handler = proc_dointvec_minmax, | |
1863 | .extra1 = &zero, | |
1864 | .extra2 = &one, | |
1865 | }, | |
1866 | { | |
1867 | .procname = "protected_hardlinks", | |
1868 | .data = &sysctl_protected_hardlinks, | |
1869 | .maxlen = sizeof(int), | |
1870 | .mode = 0600, | |
1871 | .proc_handler = proc_dointvec_minmax, | |
1872 | .extra1 = &zero, | |
1873 | .extra2 = &one, | |
1874 | }, | |
7bcfd8f9 SM |
1875 | { |
1876 | .procname = "protected_fifos", | |
1877 | .data = &sysctl_protected_fifos, | |
1878 | .maxlen = sizeof(int), | |
1879 | .mode = 0600, | |
1880 | .proc_handler = proc_dointvec_minmax, | |
1881 | .extra1 = &zero, | |
1882 | .extra2 = &two, | |
1883 | }, | |
1884 | { | |
1885 | .procname = "protected_regular", | |
1886 | .data = &sysctl_protected_regular, | |
1887 | .maxlen = sizeof(int), | |
1888 | .mode = 0600, | |
1889 | .proc_handler = proc_dointvec_minmax, | |
1890 | .extra1 = &zero, | |
1891 | .extra2 = &two, | |
1892 | }, | |
d6e71144 | 1893 | { |
d6e71144 AC |
1894 | .procname = "suid_dumpable", |
1895 | .data = &suid_dumpable, | |
1896 | .maxlen = sizeof(int), | |
1897 | .mode = 0644, | |
54b50199 | 1898 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1899 | .extra1 = &zero, |
1900 | .extra2 = &two, | |
d6e71144 | 1901 | }, |
2abc26fc EB |
1902 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1903 | { | |
2abc26fc EB |
1904 | .procname = "binfmt_misc", |
1905 | .mode = 0555, | |
f9bd6733 | 1906 | .child = sysctl_mount_point, |
2abc26fc EB |
1907 | }, |
1908 | #endif | |
b492e95b | 1909 | { |
ff9da691 JA |
1910 | .procname = "pipe-max-size", |
1911 | .data = &pipe_max_size, | |
30c2f774 | 1912 | .maxlen = sizeof(pipe_max_size), |
b492e95b | 1913 | .mode = 0644, |
ff9da691 JA |
1914 | .proc_handler = &pipe_proc_fn, |
1915 | .extra1 = &pipe_min_size, | |
b492e95b | 1916 | }, |
759c0114 WT |
1917 | { |
1918 | .procname = "pipe-user-pages-hard", | |
1919 | .data = &pipe_user_pages_hard, | |
1920 | .maxlen = sizeof(pipe_user_pages_hard), | |
1921 | .mode = 0644, | |
1922 | .proc_handler = proc_doulongvec_minmax, | |
1923 | }, | |
1924 | { | |
1925 | .procname = "pipe-user-pages-soft", | |
1926 | .data = &pipe_user_pages_soft, | |
1927 | .maxlen = sizeof(pipe_user_pages_soft), | |
1928 | .mode = 0644, | |
1929 | .proc_handler = proc_doulongvec_minmax, | |
1930 | }, | |
d2921684 EB |
1931 | { |
1932 | .procname = "mount-max", | |
1933 | .data = &sysctl_mount_max, | |
1934 | .maxlen = sizeof(unsigned int), | |
1935 | .mode = 0644, | |
1936 | .proc_handler = proc_dointvec_minmax, | |
1937 | .extra1 = &one, | |
1938 | }, | |
6fce56ec | 1939 | { } |
1da177e4 LT |
1940 | }; |
1941 | ||
d8217f07 | 1942 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1943 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1944 | { |
abd4f750 MAS |
1945 | .procname = "exception-trace", |
1946 | .data = &show_unhandled_signals, | |
1947 | .maxlen = sizeof(int), | |
1948 | .mode = 0644, | |
1949 | .proc_handler = proc_dointvec | |
1950 | }, | |
b2be84df MH |
1951 | #endif |
1952 | #if defined(CONFIG_OPTPROBES) | |
1953 | { | |
1954 | .procname = "kprobes-optimization", | |
1955 | .data = &sysctl_kprobes_optimization, | |
1956 | .maxlen = sizeof(int), | |
1957 | .mode = 0644, | |
1958 | .proc_handler = proc_kprobes_optimization_handler, | |
1959 | .extra1 = &zero, | |
1960 | .extra2 = &one, | |
1961 | }, | |
abd4f750 | 1962 | #endif |
6fce56ec | 1963 | { } |
1da177e4 LT |
1964 | }; |
1965 | ||
d8217f07 | 1966 | static struct ctl_table dev_table[] = { |
6fce56ec | 1967 | { } |
0eeca283 | 1968 | }; |
1da177e4 | 1969 | |
de4e83bd | 1970 | int __init sysctl_init(void) |
d912b0cc | 1971 | { |
fd4b616b SR |
1972 | struct ctl_table_header *hdr; |
1973 | ||
1974 | hdr = register_sysctl_table(sysctl_base_table); | |
1975 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1976 | return 0; |
1977 | } | |
1978 | ||
b89a8171 EB |
1979 | #endif /* CONFIG_SYSCTL */ |
1980 | ||
1da177e4 LT |
1981 | /* |
1982 | * /proc/sys support | |
1983 | */ | |
1984 | ||
b89a8171 | 1985 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1986 | |
f8808300 KC |
1987 | static int _proc_do_string(char *data, int maxlen, int write, |
1988 | char __user *buffer, | |
b1ba4ddd | 1989 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1990 | { |
1991 | size_t len; | |
1992 | char __user *p; | |
1993 | char c; | |
8d060877 ON |
1994 | |
1995 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1996 | *lenp = 0; |
1997 | return 0; | |
1998 | } | |
8d060877 | 1999 | |
1da177e4 | 2000 | if (write) { |
f4aacea2 KC |
2001 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
2002 | /* Only continue writes not past the end of buffer. */ | |
2003 | len = strlen(data); | |
2004 | if (len > maxlen - 1) | |
2005 | len = maxlen - 1; | |
2006 | ||
2007 | if (*ppos > len) | |
2008 | return 0; | |
2009 | len = *ppos; | |
2010 | } else { | |
2011 | /* Start writing from beginning of buffer. */ | |
2012 | len = 0; | |
2013 | } | |
2014 | ||
2ca9bb45 | 2015 | *ppos += *lenp; |
1da177e4 | 2016 | p = buffer; |
2ca9bb45 | 2017 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
2018 | if (get_user(c, p++)) |
2019 | return -EFAULT; | |
2020 | if (c == 0 || c == '\n') | |
2021 | break; | |
2ca9bb45 | 2022 | data[len++] = c; |
1da177e4 | 2023 | } |
f8808300 | 2024 | data[len] = 0; |
1da177e4 | 2025 | } else { |
f5dd3d6f SV |
2026 | len = strlen(data); |
2027 | if (len > maxlen) | |
2028 | len = maxlen; | |
8d060877 ON |
2029 | |
2030 | if (*ppos > len) { | |
2031 | *lenp = 0; | |
2032 | return 0; | |
2033 | } | |
2034 | ||
2035 | data += *ppos; | |
2036 | len -= *ppos; | |
2037 | ||
1da177e4 LT |
2038 | if (len > *lenp) |
2039 | len = *lenp; | |
2040 | if (len) | |
f8808300 | 2041 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
2042 | return -EFAULT; |
2043 | if (len < *lenp) { | |
f8808300 | 2044 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
2045 | return -EFAULT; |
2046 | len++; | |
2047 | } | |
2048 | *lenp = len; | |
2049 | *ppos += len; | |
2050 | } | |
2051 | return 0; | |
2052 | } | |
2053 | ||
f4aacea2 KC |
2054 | static void warn_sysctl_write(struct ctl_table *table) |
2055 | { | |
2056 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
2057 | "This will not be supported in the future. To silence this\n" | |
2058 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
2059 | current->comm, table->procname); | |
2060 | } | |
2061 | ||
d383d484 LR |
2062 | /** |
2063 | * proc_first_pos_non_zero_ignore - check if firs position is allowed | |
2064 | * @ppos: file position | |
2065 | * @table: the sysctl table | |
2066 | * | |
2067 | * Returns true if the first position is non-zero and the sysctl_writes_strict | |
2068 | * mode indicates this is not allowed for numeric input types. String proc | |
2069 | * hadlers can ignore the return value. | |
2070 | */ | |
2071 | static bool proc_first_pos_non_zero_ignore(loff_t *ppos, | |
2072 | struct ctl_table *table) | |
2073 | { | |
2074 | if (!*ppos) | |
2075 | return false; | |
2076 | ||
2077 | switch (sysctl_writes_strict) { | |
2078 | case SYSCTL_WRITES_STRICT: | |
2079 | return true; | |
2080 | case SYSCTL_WRITES_WARN: | |
2081 | warn_sysctl_write(table); | |
2082 | return false; | |
2083 | default: | |
2084 | return false; | |
2085 | } | |
2086 | } | |
2087 | ||
f5dd3d6f SV |
2088 | /** |
2089 | * proc_dostring - read a string sysctl | |
2090 | * @table: the sysctl table | |
2091 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
2092 | * @buffer: the user buffer |
2093 | * @lenp: the size of the user buffer | |
2094 | * @ppos: file position | |
2095 | * | |
2096 | * Reads/writes a string from/to the user buffer. If the kernel | |
2097 | * buffer provided is not large enough to hold the string, the | |
2098 | * string is truncated. The copied string is %NULL-terminated. | |
2099 | * If the string is being read by the user process, it is copied | |
2100 | * and a newline '\n' is added. It is truncated if the buffer is | |
2101 | * not large enough. | |
2102 | * | |
2103 | * Returns 0 on success. | |
2104 | */ | |
8d65af78 | 2105 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2106 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2107 | { | |
d383d484 LR |
2108 | if (write) |
2109 | proc_first_pos_non_zero_ignore(ppos, table); | |
f4aacea2 | 2110 | |
f8808300 KC |
2111 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
2112 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
2113 | } |
2114 | ||
00b7c339 AW |
2115 | static size_t proc_skip_spaces(char **buf) |
2116 | { | |
2117 | size_t ret; | |
2118 | char *tmp = skip_spaces(*buf); | |
2119 | ret = tmp - *buf; | |
2120 | *buf = tmp; | |
2121 | return ret; | |
2122 | } | |
2123 | ||
9f977fb7 OP |
2124 | static void proc_skip_char(char **buf, size_t *size, const char v) |
2125 | { | |
2126 | while (*size) { | |
2127 | if (**buf != v) | |
2128 | break; | |
2129 | (*size)--; | |
2130 | (*buf)++; | |
2131 | } | |
2132 | } | |
2133 | ||
00b7c339 AW |
2134 | #define TMPBUFLEN 22 |
2135 | /** | |
0fc377bd | 2136 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 2137 | * |
0fc377bd RD |
2138 | * @buf: a kernel buffer |
2139 | * @size: size of the kernel buffer | |
2140 | * @val: this is where the number will be stored | |
2141 | * @neg: set to %TRUE if number is negative | |
2142 | * @perm_tr: a vector which contains the allowed trailers | |
2143 | * @perm_tr_len: size of the perm_tr vector | |
2144 | * @tr: pointer to store the trailer character | |
00b7c339 | 2145 | * |
0fc377bd RD |
2146 | * In case of success %0 is returned and @buf and @size are updated with |
2147 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
2148 | * character exists (size is non-zero after returning from this | |
2149 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
2150 | */ |
2151 | static int proc_get_long(char **buf, size_t *size, | |
2152 | unsigned long *val, bool *neg, | |
2153 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
2154 | { | |
2155 | int len; | |
2156 | char *p, tmp[TMPBUFLEN]; | |
2157 | ||
2158 | if (!*size) | |
2159 | return -EINVAL; | |
2160 | ||
2161 | len = *size; | |
2162 | if (len > TMPBUFLEN - 1) | |
2163 | len = TMPBUFLEN - 1; | |
2164 | ||
2165 | memcpy(tmp, *buf, len); | |
2166 | ||
2167 | tmp[len] = 0; | |
2168 | p = tmp; | |
2169 | if (*p == '-' && *size > 1) { | |
2170 | *neg = true; | |
2171 | p++; | |
2172 | } else | |
2173 | *neg = false; | |
2174 | if (!isdigit(*p)) | |
2175 | return -EINVAL; | |
2176 | ||
2177 | *val = simple_strtoul(p, &p, 0); | |
2178 | ||
2179 | len = p - tmp; | |
2180 | ||
2181 | /* We don't know if the next char is whitespace thus we may accept | |
2182 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
2183 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
2184 | if (len == TMPBUFLEN - 1) | |
2185 | return -EINVAL; | |
2186 | ||
2187 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
2188 | return -EINVAL; | |
1da177e4 | 2189 | |
00b7c339 AW |
2190 | if (tr && (len < *size)) |
2191 | *tr = *p; | |
2192 | ||
2193 | *buf += len; | |
2194 | *size -= len; | |
2195 | ||
2196 | return 0; | |
2197 | } | |
2198 | ||
2199 | /** | |
0fc377bd | 2200 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 2201 | * |
0fc377bd RD |
2202 | * @buf: the user buffer |
2203 | * @size: the size of the user buffer | |
2204 | * @val: the integer to be converted | |
2205 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 2206 | * |
0fc377bd RD |
2207 | * In case of success %0 is returned and @buf and @size are updated with |
2208 | * the amount of bytes written. | |
00b7c339 AW |
2209 | */ |
2210 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
2211 | bool neg) | |
2212 | { | |
2213 | int len; | |
2214 | char tmp[TMPBUFLEN], *p = tmp; | |
2215 | ||
2216 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
2217 | len = strlen(tmp); | |
2218 | if (len > *size) | |
2219 | len = *size; | |
2220 | if (copy_to_user(*buf, tmp, len)) | |
2221 | return -EFAULT; | |
2222 | *size -= len; | |
2223 | *buf += len; | |
2224 | return 0; | |
2225 | } | |
2226 | #undef TMPBUFLEN | |
2227 | ||
2228 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
2229 | { | |
2230 | if (*size) { | |
2231 | char __user **buffer = (char __user **)buf; | |
2232 | if (put_user(c, *buffer)) | |
2233 | return -EFAULT; | |
2234 | (*size)--, (*buffer)++; | |
2235 | *buf = *buffer; | |
2236 | } | |
2237 | return 0; | |
2238 | } | |
1da177e4 | 2239 | |
00b7c339 | 2240 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2241 | int *valp, |
2242 | int write, void *data) | |
2243 | { | |
2244 | if (write) { | |
230633d1 HS |
2245 | if (*negp) { |
2246 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
2247 | return -EINVAL; | |
2248 | *valp = -*lvalp; | |
2249 | } else { | |
2250 | if (*lvalp > (unsigned long) INT_MAX) | |
2251 | return -EINVAL; | |
2252 | *valp = *lvalp; | |
2253 | } | |
1da177e4 LT |
2254 | } else { |
2255 | int val = *valp; | |
2256 | if (val < 0) { | |
00b7c339 | 2257 | *negp = true; |
9a5bc726 | 2258 | *lvalp = -(unsigned long)val; |
1da177e4 | 2259 | } else { |
00b7c339 | 2260 | *negp = false; |
1da177e4 LT |
2261 | *lvalp = (unsigned long)val; |
2262 | } | |
2263 | } | |
2264 | return 0; | |
2265 | } | |
2266 | ||
4f2fec00 LR |
2267 | static int do_proc_douintvec_conv(unsigned long *lvalp, |
2268 | unsigned int *valp, | |
2269 | int write, void *data) | |
e7d316a0 SAK |
2270 | { |
2271 | if (write) { | |
425fffd8 LZ |
2272 | if (*lvalp > UINT_MAX) |
2273 | return -EINVAL; | |
e7d316a0 SAK |
2274 | *valp = *lvalp; |
2275 | } else { | |
2276 | unsigned int val = *valp; | |
2277 | *lvalp = (unsigned long)val; | |
2278 | } | |
2279 | return 0; | |
2280 | } | |
2281 | ||
00b7c339 AW |
2282 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
2283 | ||
d8217f07 | 2284 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2285 | int write, void __user *buffer, |
fcfbd547 | 2286 | size_t *lenp, loff_t *ppos, |
00b7c339 | 2287 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
2288 | int write, void *data), |
2289 | void *data) | |
2290 | { | |
00b7c339 | 2291 | int *i, vleft, first = 1, err = 0; |
00b7c339 | 2292 | size_t left; |
70f6cbb6 | 2293 | char *kbuf = NULL, *p; |
1da177e4 | 2294 | |
00b7c339 | 2295 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2296 | *lenp = 0; |
2297 | return 0; | |
2298 | } | |
2299 | ||
fcfbd547 | 2300 | i = (int *) tbl_data; |
1da177e4 LT |
2301 | vleft = table->maxlen / sizeof(*i); |
2302 | left = *lenp; | |
2303 | ||
2304 | if (!conv) | |
2305 | conv = do_proc_dointvec_conv; | |
2306 | ||
00b7c339 | 2307 | if (write) { |
d383d484 LR |
2308 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2309 | goto out; | |
f4aacea2 | 2310 | |
00b7c339 AW |
2311 | if (left > PAGE_SIZE - 1) |
2312 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2313 | p = kbuf = memdup_user_nul(buffer, left); |
2314 | if (IS_ERR(kbuf)) | |
2315 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2316 | } |
2317 | ||
1da177e4 | 2318 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2319 | unsigned long lval; |
2320 | bool neg; | |
1da177e4 | 2321 | |
00b7c339 | 2322 | if (write) { |
70f6cbb6 | 2323 | left -= proc_skip_spaces(&p); |
1da177e4 | 2324 | |
563b0467 O |
2325 | if (!left) |
2326 | break; | |
70f6cbb6 | 2327 | err = proc_get_long(&p, &left, &lval, &neg, |
00b7c339 AW |
2328 | proc_wspace_sep, |
2329 | sizeof(proc_wspace_sep), NULL); | |
2330 | if (err) | |
1da177e4 | 2331 | break; |
00b7c339 AW |
2332 | if (conv(&neg, &lval, i, 1, data)) { |
2333 | err = -EINVAL; | |
1da177e4 | 2334 | break; |
00b7c339 | 2335 | } |
1da177e4 | 2336 | } else { |
00b7c339 AW |
2337 | if (conv(&neg, &lval, i, 0, data)) { |
2338 | err = -EINVAL; | |
2339 | break; | |
2340 | } | |
1da177e4 | 2341 | if (!first) |
00b7c339 AW |
2342 | err = proc_put_char(&buffer, &left, '\t'); |
2343 | if (err) | |
2344 | break; | |
2345 | err = proc_put_long(&buffer, &left, lval, neg); | |
2346 | if (err) | |
1da177e4 | 2347 | break; |
1da177e4 LT |
2348 | } |
2349 | } | |
2350 | ||
00b7c339 AW |
2351 | if (!write && !first && left && !err) |
2352 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2353 | if (write && !err && left) |
70f6cbb6 | 2354 | left -= proc_skip_spaces(&p); |
1da177e4 | 2355 | if (write) { |
70f6cbb6 | 2356 | kfree(kbuf); |
00b7c339 AW |
2357 | if (first) |
2358 | return err ? : -EINVAL; | |
1da177e4 | 2359 | } |
1da177e4 | 2360 | *lenp -= left; |
f4aacea2 | 2361 | out: |
1da177e4 | 2362 | *ppos += *lenp; |
00b7c339 | 2363 | return err; |
1da177e4 LT |
2364 | } |
2365 | ||
8d65af78 | 2366 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2367 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2368 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2369 | int write, void *data), |
2370 | void *data) | |
2371 | { | |
8d65af78 | 2372 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2373 | buffer, lenp, ppos, conv, data); |
2374 | } | |
2375 | ||
4f2fec00 LR |
2376 | static int do_proc_douintvec_w(unsigned int *tbl_data, |
2377 | struct ctl_table *table, | |
2378 | void __user *buffer, | |
2379 | size_t *lenp, loff_t *ppos, | |
2380 | int (*conv)(unsigned long *lvalp, | |
2381 | unsigned int *valp, | |
2382 | int write, void *data), | |
2383 | void *data) | |
2384 | { | |
2385 | unsigned long lval; | |
2386 | int err = 0; | |
2387 | size_t left; | |
2388 | bool neg; | |
2389 | char *kbuf = NULL, *p; | |
2390 | ||
2391 | left = *lenp; | |
2392 | ||
2393 | if (proc_first_pos_non_zero_ignore(ppos, table)) | |
2394 | goto bail_early; | |
2395 | ||
2396 | if (left > PAGE_SIZE - 1) | |
2397 | left = PAGE_SIZE - 1; | |
2398 | ||
2399 | p = kbuf = memdup_user_nul(buffer, left); | |
2400 | if (IS_ERR(kbuf)) | |
2401 | return -EINVAL; | |
2402 | ||
2403 | left -= proc_skip_spaces(&p); | |
2404 | if (!left) { | |
2405 | err = -EINVAL; | |
2406 | goto out_free; | |
2407 | } | |
2408 | ||
2409 | err = proc_get_long(&p, &left, &lval, &neg, | |
2410 | proc_wspace_sep, | |
2411 | sizeof(proc_wspace_sep), NULL); | |
2412 | if (err || neg) { | |
2413 | err = -EINVAL; | |
2414 | goto out_free; | |
2415 | } | |
2416 | ||
2417 | if (conv(&lval, tbl_data, 1, data)) { | |
2418 | err = -EINVAL; | |
2419 | goto out_free; | |
2420 | } | |
2421 | ||
2422 | if (!err && left) | |
2423 | left -= proc_skip_spaces(&p); | |
2424 | ||
2425 | out_free: | |
2426 | kfree(kbuf); | |
2427 | if (err) | |
2428 | return -EINVAL; | |
2429 | ||
2430 | return 0; | |
2431 | ||
2432 | /* This is in keeping with old __do_proc_dointvec() */ | |
2433 | bail_early: | |
2434 | *ppos += *lenp; | |
2435 | return err; | |
2436 | } | |
2437 | ||
2438 | static int do_proc_douintvec_r(unsigned int *tbl_data, void __user *buffer, | |
2439 | size_t *lenp, loff_t *ppos, | |
2440 | int (*conv)(unsigned long *lvalp, | |
2441 | unsigned int *valp, | |
2442 | int write, void *data), | |
2443 | void *data) | |
2444 | { | |
2445 | unsigned long lval; | |
2446 | int err = 0; | |
2447 | size_t left; | |
2448 | ||
2449 | left = *lenp; | |
2450 | ||
2451 | if (conv(&lval, tbl_data, 0, data)) { | |
2452 | err = -EINVAL; | |
2453 | goto out; | |
2454 | } | |
2455 | ||
2456 | err = proc_put_long(&buffer, &left, lval, false); | |
2457 | if (err || !left) | |
2458 | goto out; | |
2459 | ||
2460 | err = proc_put_char(&buffer, &left, '\n'); | |
2461 | ||
2462 | out: | |
2463 | *lenp -= left; | |
2464 | *ppos += *lenp; | |
2465 | ||
2466 | return err; | |
2467 | } | |
2468 | ||
2469 | static int __do_proc_douintvec(void *tbl_data, struct ctl_table *table, | |
2470 | int write, void __user *buffer, | |
2471 | size_t *lenp, loff_t *ppos, | |
2472 | int (*conv)(unsigned long *lvalp, | |
2473 | unsigned int *valp, | |
2474 | int write, void *data), | |
2475 | void *data) | |
2476 | { | |
2477 | unsigned int *i, vleft; | |
2478 | ||
2479 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
2480 | *lenp = 0; | |
2481 | return 0; | |
2482 | } | |
2483 | ||
2484 | i = (unsigned int *) tbl_data; | |
2485 | vleft = table->maxlen / sizeof(*i); | |
2486 | ||
2487 | /* | |
2488 | * Arrays are not supported, keep this simple. *Do not* add | |
2489 | * support for them. | |
2490 | */ | |
2491 | if (vleft != 1) { | |
2492 | *lenp = 0; | |
2493 | return -EINVAL; | |
2494 | } | |
2495 | ||
2496 | if (!conv) | |
2497 | conv = do_proc_douintvec_conv; | |
2498 | ||
2499 | if (write) | |
2500 | return do_proc_douintvec_w(i, table, buffer, lenp, ppos, | |
2501 | conv, data); | |
2502 | return do_proc_douintvec_r(i, buffer, lenp, ppos, conv, data); | |
2503 | } | |
2504 | ||
2505 | static int do_proc_douintvec(struct ctl_table *table, int write, | |
2506 | void __user *buffer, size_t *lenp, loff_t *ppos, | |
2507 | int (*conv)(unsigned long *lvalp, | |
2508 | unsigned int *valp, | |
2509 | int write, void *data), | |
2510 | void *data) | |
2511 | { | |
2512 | return __do_proc_douintvec(table->data, table, write, | |
2513 | buffer, lenp, ppos, conv, data); | |
2514 | } | |
2515 | ||
1da177e4 LT |
2516 | /** |
2517 | * proc_dointvec - read a vector of integers | |
2518 | * @table: the sysctl table | |
2519 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2520 | * @buffer: the user buffer |
2521 | * @lenp: the size of the user buffer | |
2522 | * @ppos: file position | |
2523 | * | |
2524 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2525 | * values from/to the user buffer, treated as an ASCII string. | |
2526 | * | |
2527 | * Returns 0 on success. | |
2528 | */ | |
8d65af78 | 2529 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2530 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2531 | { | |
e7d316a0 SAK |
2532 | return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); |
2533 | } | |
2534 | ||
2535 | /** | |
2536 | * proc_douintvec - read a vector of unsigned integers | |
2537 | * @table: the sysctl table | |
2538 | * @write: %TRUE if this is a write to the sysctl file | |
2539 | * @buffer: the user buffer | |
2540 | * @lenp: the size of the user buffer | |
2541 | * @ppos: file position | |
2542 | * | |
2543 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2544 | * values from/to the user buffer, treated as an ASCII string. | |
2545 | * | |
2546 | * Returns 0 on success. | |
2547 | */ | |
2548 | int proc_douintvec(struct ctl_table *table, int write, | |
2549 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2550 | { | |
4f2fec00 LR |
2551 | return do_proc_douintvec(table, write, buffer, lenp, ppos, |
2552 | do_proc_douintvec_conv, NULL); | |
1da177e4 LT |
2553 | } |
2554 | ||
34f5a398 | 2555 | /* |
25ddbb18 AK |
2556 | * Taint values can only be increased |
2557 | * This means we can safely use a temporary. | |
34f5a398 | 2558 | */ |
8d65af78 | 2559 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2560 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2561 | { | |
25ddbb18 AK |
2562 | struct ctl_table t; |
2563 | unsigned long tmptaint = get_taint(); | |
2564 | int err; | |
34f5a398 | 2565 | |
91fcd412 | 2566 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2567 | return -EPERM; |
2568 | ||
25ddbb18 AK |
2569 | t = *table; |
2570 | t.data = &tmptaint; | |
8d65af78 | 2571 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2572 | if (err < 0) |
2573 | return err; | |
2574 | ||
2575 | if (write) { | |
2576 | /* | |
2577 | * Poor man's atomic or. Not worth adding a primitive | |
2578 | * to everyone's atomic.h for this | |
2579 | */ | |
2580 | int i; | |
2581 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2582 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2583 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2584 | } |
2585 | } | |
2586 | ||
2587 | return err; | |
34f5a398 TT |
2588 | } |
2589 | ||
bfdc0b49 | 2590 | #ifdef CONFIG_PRINTK |
620f6e8e | 2591 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2592 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2593 | { | |
2594 | if (write && !capable(CAP_SYS_ADMIN)) | |
2595 | return -EPERM; | |
2596 | ||
2597 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2598 | } | |
2599 | #endif | |
2600 | ||
1da177e4 LT |
2601 | struct do_proc_dointvec_minmax_conv_param { |
2602 | int *min; | |
2603 | int *max; | |
2604 | }; | |
2605 | ||
00b7c339 AW |
2606 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2607 | int *valp, | |
1da177e4 LT |
2608 | int write, void *data) |
2609 | { | |
2610 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2611 | if (write) { | |
73a79d1b ZW |
2612 | int val; |
2613 | if (*negp) { | |
2614 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
2615 | return -EINVAL; | |
2616 | val = -*lvalp; | |
2617 | } else { | |
2618 | if (*lvalp > (unsigned long) INT_MAX) | |
2619 | return -EINVAL; | |
2620 | val = *lvalp; | |
2621 | } | |
1da177e4 LT |
2622 | if ((param->min && *param->min > val) || |
2623 | (param->max && *param->max < val)) | |
2624 | return -EINVAL; | |
2625 | *valp = val; | |
2626 | } else { | |
2627 | int val = *valp; | |
2628 | if (val < 0) { | |
00b7c339 | 2629 | *negp = true; |
9a5bc726 | 2630 | *lvalp = -(unsigned long)val; |
1da177e4 | 2631 | } else { |
00b7c339 | 2632 | *negp = false; |
1da177e4 LT |
2633 | *lvalp = (unsigned long)val; |
2634 | } | |
2635 | } | |
2636 | return 0; | |
2637 | } | |
2638 | ||
2639 | /** | |
2640 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2641 | * @table: the sysctl table | |
2642 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2643 | * @buffer: the user buffer |
2644 | * @lenp: the size of the user buffer | |
2645 | * @ppos: file position | |
2646 | * | |
2647 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2648 | * values from/to the user buffer, treated as an ASCII string. | |
2649 | * | |
2650 | * This routine will ensure the values are within the range specified by | |
2651 | * table->extra1 (min) and table->extra2 (max). | |
2652 | * | |
2653 | * Returns 0 on success. | |
2654 | */ | |
8d65af78 | 2655 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2656 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2657 | { | |
2658 | struct do_proc_dointvec_minmax_conv_param param = { | |
2659 | .min = (int *) table->extra1, | |
2660 | .max = (int *) table->extra2, | |
2661 | }; | |
8d65af78 | 2662 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2663 | do_proc_dointvec_minmax_conv, ¶m); |
2664 | } | |
2665 | ||
61d9b56a LR |
2666 | struct do_proc_douintvec_minmax_conv_param { |
2667 | unsigned int *min; | |
2668 | unsigned int *max; | |
2669 | }; | |
2670 | ||
2671 | static int do_proc_douintvec_minmax_conv(unsigned long *lvalp, | |
2672 | unsigned int *valp, | |
2673 | int write, void *data) | |
2674 | { | |
2675 | struct do_proc_douintvec_minmax_conv_param *param = data; | |
2676 | ||
2677 | if (write) { | |
2678 | unsigned int val = *lvalp; | |
2679 | ||
2680 | if ((param->min && *param->min > val) || | |
2681 | (param->max && *param->max < val)) | |
2682 | return -ERANGE; | |
2683 | ||
2684 | if (*lvalp > UINT_MAX) | |
2685 | return -EINVAL; | |
2686 | *valp = val; | |
2687 | } else { | |
2688 | unsigned int val = *valp; | |
2689 | *lvalp = (unsigned long) val; | |
2690 | } | |
2691 | ||
2692 | return 0; | |
2693 | } | |
2694 | ||
2695 | /** | |
2696 | * proc_douintvec_minmax - read a vector of unsigned ints with min/max values | |
2697 | * @table: the sysctl table | |
2698 | * @write: %TRUE if this is a write to the sysctl file | |
2699 | * @buffer: the user buffer | |
2700 | * @lenp: the size of the user buffer | |
2701 | * @ppos: file position | |
2702 | * | |
2703 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2704 | * values from/to the user buffer, treated as an ASCII string. Negative | |
2705 | * strings are not allowed. | |
2706 | * | |
2707 | * This routine will ensure the values are within the range specified by | |
2708 | * table->extra1 (min) and table->extra2 (max). There is a final sanity | |
2709 | * check for UINT_MAX to avoid having to support wrap around uses from | |
2710 | * userspace. | |
2711 | * | |
2712 | * Returns 0 on success. | |
2713 | */ | |
2714 | int proc_douintvec_minmax(struct ctl_table *table, int write, | |
2715 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2716 | { | |
2717 | struct do_proc_douintvec_minmax_conv_param param = { | |
2718 | .min = (unsigned int *) table->extra1, | |
2719 | .max = (unsigned int *) table->extra2, | |
2720 | }; | |
2721 | return do_proc_douintvec(table, write, buffer, lenp, ppos, | |
2722 | do_proc_douintvec_minmax_conv, ¶m); | |
2723 | } | |
2724 | ||
54b50199 KC |
2725 | static void validate_coredump_safety(void) |
2726 | { | |
046d662f | 2727 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2728 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 | 2729 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
760c6a91 AD |
2730 | printk(KERN_WARNING |
2731 | "Unsafe core_pattern used with fs.suid_dumpable=2.\n" | |
2732 | "Pipe handler or fully qualified core dump path required.\n" | |
2733 | "Set kernel.core_pattern before fs.suid_dumpable.\n" | |
2734 | ); | |
54b50199 | 2735 | } |
046d662f | 2736 | #endif |
54b50199 KC |
2737 | } |
2738 | ||
2739 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2740 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2741 | { | |
2742 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2743 | if (!error) | |
2744 | validate_coredump_safety(); | |
2745 | return error; | |
2746 | } | |
2747 | ||
046d662f | 2748 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2749 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2750 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2751 | { | |
2752 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2753 | if (!error) | |
2754 | validate_coredump_safety(); | |
2755 | return error; | |
2756 | } | |
046d662f | 2757 | #endif |
54b50199 | 2758 | |
d8217f07 | 2759 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2760 | void __user *buffer, |
2761 | size_t *lenp, loff_t *ppos, | |
2762 | unsigned long convmul, | |
2763 | unsigned long convdiv) | |
2764 | { | |
00b7c339 AW |
2765 | unsigned long *i, *min, *max; |
2766 | int vleft, first = 1, err = 0; | |
00b7c339 | 2767 | size_t left; |
70f6cbb6 | 2768 | char *kbuf = NULL, *p; |
00b7c339 AW |
2769 | |
2770 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2771 | *lenp = 0; |
2772 | return 0; | |
2773 | } | |
00b7c339 | 2774 | |
fcfbd547 | 2775 | i = (unsigned long *) data; |
1da177e4 LT |
2776 | min = (unsigned long *) table->extra1; |
2777 | max = (unsigned long *) table->extra2; | |
2778 | vleft = table->maxlen / sizeof(unsigned long); | |
2779 | left = *lenp; | |
00b7c339 AW |
2780 | |
2781 | if (write) { | |
d383d484 LR |
2782 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2783 | goto out; | |
f4aacea2 | 2784 | |
00b7c339 AW |
2785 | if (left > PAGE_SIZE - 1) |
2786 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2787 | p = kbuf = memdup_user_nul(buffer, left); |
2788 | if (IS_ERR(kbuf)) | |
2789 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2790 | } |
2791 | ||
27b3d80a | 2792 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2793 | unsigned long val; |
2794 | ||
1da177e4 | 2795 | if (write) { |
00b7c339 AW |
2796 | bool neg; |
2797 | ||
70f6cbb6 | 2798 | left -= proc_skip_spaces(&p); |
ff9c3ae8 CL |
2799 | if (!left) |
2800 | break; | |
00b7c339 | 2801 | |
70f6cbb6 | 2802 | err = proc_get_long(&p, &left, &val, &neg, |
00b7c339 AW |
2803 | proc_wspace_sep, |
2804 | sizeof(proc_wspace_sep), NULL); | |
2805 | if (err) | |
1da177e4 LT |
2806 | break; |
2807 | if (neg) | |
1da177e4 | 2808 | continue; |
ff9f8a7c | 2809 | val = convmul * val / convdiv; |
1da177e4 LT |
2810 | if ((min && val < *min) || (max && val > *max)) |
2811 | continue; | |
2812 | *i = val; | |
2813 | } else { | |
00b7c339 | 2814 | val = convdiv * (*i) / convmul; |
7833819d | 2815 | if (!first) { |
00b7c339 | 2816 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2817 | if (err) |
2818 | break; | |
2819 | } | |
00b7c339 AW |
2820 | err = proc_put_long(&buffer, &left, val, false); |
2821 | if (err) | |
2822 | break; | |
1da177e4 LT |
2823 | } |
2824 | } | |
2825 | ||
00b7c339 AW |
2826 | if (!write && !first && left && !err) |
2827 | err = proc_put_char(&buffer, &left, '\n'); | |
2828 | if (write && !err) | |
70f6cbb6 | 2829 | left -= proc_skip_spaces(&p); |
1da177e4 | 2830 | if (write) { |
70f6cbb6 | 2831 | kfree(kbuf); |
00b7c339 AW |
2832 | if (first) |
2833 | return err ? : -EINVAL; | |
1da177e4 | 2834 | } |
1da177e4 | 2835 | *lenp -= left; |
f4aacea2 | 2836 | out: |
1da177e4 | 2837 | *ppos += *lenp; |
00b7c339 | 2838 | return err; |
1da177e4 LT |
2839 | } |
2840 | ||
d8217f07 | 2841 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2842 | void __user *buffer, |
2843 | size_t *lenp, loff_t *ppos, | |
2844 | unsigned long convmul, | |
2845 | unsigned long convdiv) | |
2846 | { | |
2847 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2848 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2849 | } |
2850 | ||
1da177e4 LT |
2851 | /** |
2852 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2853 | * @table: the sysctl table | |
2854 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2855 | * @buffer: the user buffer |
2856 | * @lenp: the size of the user buffer | |
2857 | * @ppos: file position | |
2858 | * | |
2859 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2860 | * values from/to the user buffer, treated as an ASCII string. | |
2861 | * | |
2862 | * This routine will ensure the values are within the range specified by | |
2863 | * table->extra1 (min) and table->extra2 (max). | |
2864 | * | |
2865 | * Returns 0 on success. | |
2866 | */ | |
8d65af78 | 2867 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2868 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2869 | { | |
8d65af78 | 2870 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2871 | } |
2872 | ||
2873 | /** | |
2874 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2875 | * @table: the sysctl table | |
2876 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2877 | * @buffer: the user buffer |
2878 | * @lenp: the size of the user buffer | |
2879 | * @ppos: file position | |
2880 | * | |
2881 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2882 | * values from/to the user buffer, treated as an ASCII string. The values | |
2883 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2884 | * | |
2885 | * This routine will ensure the values are within the range specified by | |
2886 | * table->extra1 (min) and table->extra2 (max). | |
2887 | * | |
2888 | * Returns 0 on success. | |
2889 | */ | |
d8217f07 | 2890 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2891 | void __user *buffer, |
2892 | size_t *lenp, loff_t *ppos) | |
2893 | { | |
8d65af78 | 2894 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2895 | lenp, ppos, HZ, 1000l); |
2896 | } | |
2897 | ||
2898 | ||
00b7c339 | 2899 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2900 | int *valp, |
2901 | int write, void *data) | |
2902 | { | |
2903 | if (write) { | |
63259457 | 2904 | if (*lvalp > INT_MAX / HZ) |
cba9f33d | 2905 | return 1; |
1da177e4 LT |
2906 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2907 | } else { | |
2908 | int val = *valp; | |
2909 | unsigned long lval; | |
2910 | if (val < 0) { | |
00b7c339 | 2911 | *negp = true; |
9a5bc726 | 2912 | lval = -(unsigned long)val; |
1da177e4 | 2913 | } else { |
00b7c339 | 2914 | *negp = false; |
1da177e4 LT |
2915 | lval = (unsigned long)val; |
2916 | } | |
2917 | *lvalp = lval / HZ; | |
2918 | } | |
2919 | return 0; | |
2920 | } | |
2921 | ||
00b7c339 | 2922 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2923 | int *valp, |
2924 | int write, void *data) | |
2925 | { | |
2926 | if (write) { | |
cba9f33d BS |
2927 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2928 | return 1; | |
1da177e4 LT |
2929 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2930 | } else { | |
2931 | int val = *valp; | |
2932 | unsigned long lval; | |
2933 | if (val < 0) { | |
00b7c339 | 2934 | *negp = true; |
9a5bc726 | 2935 | lval = -(unsigned long)val; |
1da177e4 | 2936 | } else { |
00b7c339 | 2937 | *negp = false; |
1da177e4 LT |
2938 | lval = (unsigned long)val; |
2939 | } | |
2940 | *lvalp = jiffies_to_clock_t(lval); | |
2941 | } | |
2942 | return 0; | |
2943 | } | |
2944 | ||
00b7c339 | 2945 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2946 | int *valp, |
2947 | int write, void *data) | |
2948 | { | |
2949 | if (write) { | |
d738ce8f FF |
2950 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2951 | ||
2952 | if (jif > INT_MAX) | |
2953 | return 1; | |
2954 | *valp = (int)jif; | |
1da177e4 LT |
2955 | } else { |
2956 | int val = *valp; | |
2957 | unsigned long lval; | |
2958 | if (val < 0) { | |
00b7c339 | 2959 | *negp = true; |
9a5bc726 | 2960 | lval = -(unsigned long)val; |
1da177e4 | 2961 | } else { |
00b7c339 | 2962 | *negp = false; |
1da177e4 LT |
2963 | lval = (unsigned long)val; |
2964 | } | |
2965 | *lvalp = jiffies_to_msecs(lval); | |
2966 | } | |
2967 | return 0; | |
2968 | } | |
2969 | ||
2970 | /** | |
2971 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2972 | * @table: the sysctl table | |
2973 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2974 | * @buffer: the user buffer |
2975 | * @lenp: the size of the user buffer | |
2976 | * @ppos: file position | |
2977 | * | |
2978 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2979 | * values from/to the user buffer, treated as an ASCII string. | |
2980 | * The values read are assumed to be in seconds, and are converted into | |
2981 | * jiffies. | |
2982 | * | |
2983 | * Returns 0 on success. | |
2984 | */ | |
8d65af78 | 2985 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2986 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2987 | { | |
8d65af78 | 2988 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2989 | do_proc_dointvec_jiffies_conv,NULL); |
2990 | } | |
2991 | ||
2992 | /** | |
2993 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2994 | * @table: the sysctl table | |
2995 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2996 | * @buffer: the user buffer |
2997 | * @lenp: the size of the user buffer | |
1e5d5331 | 2998 | * @ppos: pointer to the file position |
1da177e4 LT |
2999 | * |
3000 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
3001 | * values from/to the user buffer, treated as an ASCII string. | |
3002 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
3003 | * are converted into jiffies. | |
3004 | * | |
3005 | * Returns 0 on success. | |
3006 | */ | |
8d65af78 | 3007 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3008 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3009 | { | |
8d65af78 | 3010 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
3011 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
3012 | } | |
3013 | ||
3014 | /** | |
3015 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
3016 | * @table: the sysctl table | |
3017 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
3018 | * @buffer: the user buffer |
3019 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
3020 | * @ppos: file position |
3021 | * @ppos: the current position in the file | |
1da177e4 LT |
3022 | * |
3023 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
3024 | * values from/to the user buffer, treated as an ASCII string. | |
3025 | * The values read are assumed to be in 1/1000 seconds, and | |
3026 | * are converted into jiffies. | |
3027 | * | |
3028 | * Returns 0 on success. | |
3029 | */ | |
8d65af78 | 3030 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3031 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3032 | { | |
8d65af78 | 3033 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
3034 | do_proc_dointvec_ms_jiffies_conv, NULL); |
3035 | } | |
3036 | ||
8d65af78 | 3037 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
3038 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3039 | { | |
3040 | struct pid *new_pid; | |
3041 | pid_t tmp; | |
3042 | int r; | |
3043 | ||
6c5f3e7b | 3044 | tmp = pid_vnr(cad_pid); |
9ec52099 | 3045 | |
8d65af78 | 3046 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
3047 | lenp, ppos, NULL, NULL); |
3048 | if (r || !write) | |
3049 | return r; | |
3050 | ||
3051 | new_pid = find_get_pid(tmp); | |
3052 | if (!new_pid) | |
3053 | return -ESRCH; | |
3054 | ||
3055 | put_pid(xchg(&cad_pid, new_pid)); | |
3056 | return 0; | |
3057 | } | |
3058 | ||
9f977fb7 OP |
3059 | /** |
3060 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
3061 | * @table: the sysctl table | |
3062 | * @write: %TRUE if this is a write to the sysctl file | |
3063 | * @buffer: the user buffer | |
3064 | * @lenp: the size of the user buffer | |
3065 | * @ppos: file position | |
3066 | * | |
3067 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
3068 | * in table->maxlen. | |
3069 | * | |
3070 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
3071 | * large bitmaps may be represented in a compact manner. Writing into | |
3072 | * the file will clear the bitmap then update it with the given input. | |
3073 | * | |
3074 | * Returns 0 on success. | |
3075 | */ | |
3076 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
3077 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3078 | { | |
3079 | int err = 0; | |
3080 | bool first = 1; | |
3081 | size_t left = *lenp; | |
3082 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 3083 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
3084 | unsigned long *tmp_bitmap = NULL; |
3085 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
3086 | ||
122ff243 | 3087 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
3088 | *lenp = 0; |
3089 | return 0; | |
3090 | } | |
3091 | ||
3092 | if (write) { | |
70f6cbb6 | 3093 | char *kbuf, *p; |
9f977fb7 OP |
3094 | |
3095 | if (left > PAGE_SIZE - 1) | |
3096 | left = PAGE_SIZE - 1; | |
3097 | ||
70f6cbb6 AV |
3098 | p = kbuf = memdup_user_nul(buffer, left); |
3099 | if (IS_ERR(kbuf)) | |
3100 | return PTR_ERR(kbuf); | |
9f977fb7 OP |
3101 | |
3102 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
3103 | GFP_KERNEL); | |
3104 | if (!tmp_bitmap) { | |
70f6cbb6 | 3105 | kfree(kbuf); |
9f977fb7 OP |
3106 | return -ENOMEM; |
3107 | } | |
70f6cbb6 | 3108 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 OP |
3109 | while (!err && left) { |
3110 | unsigned long val_a, val_b; | |
3111 | bool neg; | |
3112 | ||
70f6cbb6 | 3113 | err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
9f977fb7 OP |
3114 | sizeof(tr_a), &c); |
3115 | if (err) | |
3116 | break; | |
3117 | if (val_a >= bitmap_len || neg) { | |
3118 | err = -EINVAL; | |
3119 | break; | |
3120 | } | |
3121 | ||
3122 | val_b = val_a; | |
3123 | if (left) { | |
70f6cbb6 | 3124 | p++; |
9f977fb7 OP |
3125 | left--; |
3126 | } | |
3127 | ||
3128 | if (c == '-') { | |
70f6cbb6 | 3129 | err = proc_get_long(&p, &left, &val_b, |
9f977fb7 OP |
3130 | &neg, tr_b, sizeof(tr_b), |
3131 | &c); | |
3132 | if (err) | |
3133 | break; | |
3134 | if (val_b >= bitmap_len || neg || | |
3135 | val_a > val_b) { | |
3136 | err = -EINVAL; | |
3137 | break; | |
3138 | } | |
3139 | if (left) { | |
70f6cbb6 | 3140 | p++; |
9f977fb7 OP |
3141 | left--; |
3142 | } | |
3143 | } | |
3144 | ||
5a04cca6 | 3145 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 | 3146 | first = 0; |
70f6cbb6 | 3147 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 | 3148 | } |
70f6cbb6 | 3149 | kfree(kbuf); |
9f977fb7 OP |
3150 | } else { |
3151 | unsigned long bit_a, bit_b = 0; | |
3152 | ||
3153 | while (left) { | |
3154 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
3155 | if (bit_a >= bitmap_len) | |
3156 | break; | |
3157 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
3158 | bit_a + 1) - 1; | |
3159 | ||
3160 | if (!first) { | |
3161 | err = proc_put_char(&buffer, &left, ','); | |
3162 | if (err) | |
3163 | break; | |
3164 | } | |
3165 | err = proc_put_long(&buffer, &left, bit_a, false); | |
3166 | if (err) | |
3167 | break; | |
3168 | if (bit_a != bit_b) { | |
3169 | err = proc_put_char(&buffer, &left, '-'); | |
3170 | if (err) | |
3171 | break; | |
3172 | err = proc_put_long(&buffer, &left, bit_b, false); | |
3173 | if (err) | |
3174 | break; | |
3175 | } | |
3176 | ||
3177 | first = 0; bit_b++; | |
3178 | } | |
3179 | if (!err) | |
3180 | err = proc_put_char(&buffer, &left, '\n'); | |
3181 | } | |
3182 | ||
3183 | if (!err) { | |
3184 | if (write) { | |
3185 | if (*ppos) | |
3186 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
3187 | else | |
5a04cca6 | 3188 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 OP |
3189 | } |
3190 | kfree(tmp_bitmap); | |
3191 | *lenp -= left; | |
3192 | *ppos += *lenp; | |
3193 | return 0; | |
3194 | } else { | |
3195 | kfree(tmp_bitmap); | |
3196 | return err; | |
3197 | } | |
3198 | } | |
3199 | ||
55610500 | 3200 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3201 | |
8d65af78 | 3202 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
3203 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3204 | { | |
3205 | return -ENOSYS; | |
3206 | } | |
3207 | ||
8d65af78 | 3208 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 3209 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
3210 | { |
3211 | return -ENOSYS; | |
3212 | } | |
3213 | ||
e7d316a0 SAK |
3214 | int proc_douintvec(struct ctl_table *table, int write, |
3215 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3216 | { | |
3217 | return -ENOSYS; | |
3218 | } | |
3219 | ||
8d65af78 | 3220 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3221 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3222 | { | |
3223 | return -ENOSYS; | |
3224 | } | |
3225 | ||
61d9b56a LR |
3226 | int proc_douintvec_minmax(struct ctl_table *table, int write, |
3227 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3228 | { | |
3229 | return -ENOSYS; | |
3230 | } | |
3231 | ||
8d65af78 | 3232 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3233 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3234 | { | |
3235 | return -ENOSYS; | |
3236 | } | |
3237 | ||
8d65af78 | 3238 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3239 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3240 | { | |
3241 | return -ENOSYS; | |
3242 | } | |
3243 | ||
8d65af78 | 3244 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3245 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3246 | { | |
3247 | return -ENOSYS; | |
3248 | } | |
3249 | ||
8d65af78 | 3250 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3251 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3252 | { | |
3253 | return -ENOSYS; | |
3254 | } | |
3255 | ||
d8217f07 | 3256 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3257 | void __user *buffer, |
3258 | size_t *lenp, loff_t *ppos) | |
3259 | { | |
3260 | return -ENOSYS; | |
3261 | } | |
3262 | ||
3263 | ||
55610500 | 3264 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3265 | |
1da177e4 LT |
3266 | /* |
3267 | * No sense putting this after each symbol definition, twice, | |
3268 | * exception granted :-) | |
3269 | */ | |
3270 | EXPORT_SYMBOL(proc_dointvec); | |
e7d316a0 | 3271 | EXPORT_SYMBOL(proc_douintvec); |
1da177e4 LT |
3272 | EXPORT_SYMBOL(proc_dointvec_jiffies); |
3273 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
61d9b56a | 3274 | EXPORT_SYMBOL_GPL(proc_douintvec_minmax); |
1da177e4 LT |
3275 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); |
3276 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
3277 | EXPORT_SYMBOL(proc_dostring); | |
3278 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
3279 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |