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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 | 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> |
dfec072e | 33 | #include <linux/kmemcheck.h> |
fd4b616b | 34 | #include <linux/kmemleak.h> |
62239ac2 | 35 | #include <linux/fs.h> |
1da177e4 LT |
36 | #include <linux/init.h> |
37 | #include <linux/kernel.h> | |
0296b228 | 38 | #include <linux/kobject.h> |
20380731 | 39 | #include <linux/net.h> |
1da177e4 LT |
40 | #include <linux/sysrq.h> |
41 | #include <linux/highuid.h> | |
42 | #include <linux/writeback.h> | |
3fff4c42 | 43 | #include <linux/ratelimit.h> |
76ab0f53 | 44 | #include <linux/compaction.h> |
1da177e4 | 45 | #include <linux/hugetlb.h> |
1da177e4 | 46 | #include <linux/initrd.h> |
0b77f5bf | 47 | #include <linux/key.h> |
1da177e4 LT |
48 | #include <linux/times.h> |
49 | #include <linux/limits.h> | |
50 | #include <linux/dcache.h> | |
6e006701 | 51 | #include <linux/dnotify.h> |
1da177e4 | 52 | #include <linux/syscalls.h> |
c748e134 | 53 | #include <linux/vmstat.h> |
c255d844 PM |
54 | #include <linux/nfs_fs.h> |
55 | #include <linux/acpi.h> | |
10a0a8d4 | 56 | #include <linux/reboot.h> |
b0fc494f | 57 | #include <linux/ftrace.h> |
cdd6c482 | 58 | #include <linux/perf_event.h> |
b2be84df | 59 | #include <linux/kprobes.h> |
b492e95b | 60 | #include <linux/pipe_fs_i.h> |
8e4228e1 | 61 | #include <linux/oom.h> |
17f60a7d | 62 | #include <linux/kmod.h> |
73efc039 | 63 | #include <linux/capability.h> |
40401530 | 64 | #include <linux/binfmts.h> |
cf4aebc2 | 65 | #include <linux/sched/sysctl.h> |
f7ccbae4 | 66 | #include <linux/sched/coredump.h> |
7984754b | 67 | #include <linux/kexec.h> |
1be7f75d | 68 | #include <linux/bpf.h> |
d2921684 | 69 | #include <linux/mount.h> |
1da177e4 | 70 | |
7c0f6ba6 | 71 | #include <linux/uaccess.h> |
11133ff3 | 72 | #include <linux/mutex.h> |
1da177e4 LT |
73 | #include <asm/processor.h> |
74 | ||
29cbc78b | 75 | #ifdef CONFIG_X86 |
357b57d7 | 76 | #include <asm/msr.h> |
29cbc78b | 77 | #include <asm/nmi.h> |
0741f4d2 | 78 | #include <asm/stacktrace.h> |
6e7c4025 | 79 | #include <asm/io.h> |
29cbc78b | 80 | #endif |
d550bbd4 DH |
81 | #ifdef CONFIG_SPARC |
82 | #include <asm/setup.h> | |
83 | #endif | |
c55b7c3e DY |
84 | #ifdef CONFIG_BSD_PROCESS_ACCT |
85 | #include <linux/acct.h> | |
86 | #endif | |
4f0e056f DY |
87 | #ifdef CONFIG_RT_MUTEXES |
88 | #include <linux/rtmutex.h> | |
89 | #endif | |
2edf5e49 DY |
90 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
91 | #include <linux/lockdep.h> | |
92 | #endif | |
15485a46 DY |
93 | #ifdef CONFIG_CHR_DEV_SG |
94 | #include <scsi/sg.h> | |
95 | #endif | |
29cbc78b | 96 | |
58687acb | 97 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
98 | #include <linux/nmi.h> |
99 | #endif | |
100 | ||
1da177e4 LT |
101 | #if defined(CONFIG_SYSCTL) |
102 | ||
103 | /* External variables not in a header file. */ | |
d6e71144 | 104 | extern int suid_dumpable; |
046d662f AK |
105 | #ifdef CONFIG_COREDUMP |
106 | extern int core_uses_pid; | |
1da177e4 | 107 | extern char core_pattern[]; |
a293980c | 108 | extern unsigned int core_pipe_limit; |
046d662f | 109 | #endif |
8fa8a002 SH |
110 | #ifdef CONFIG_USER_NS |
111 | extern int unprivileged_userns_clone; | |
112 | #endif | |
1da177e4 | 113 | extern int pid_max; |
1da177e4 | 114 | extern int pid_max_min, pid_max_max; |
8ad4b1fb | 115 | extern int percpu_pagelist_fraction; |
9745512c | 116 | extern int latencytop_enabled; |
9b80a184 | 117 | extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
118 | #ifndef CONFIG_MMU |
119 | extern int sysctl_nr_trim_pages; | |
120 | #endif | |
1da177e4 | 121 | |
c4f3b63f | 122 | /* Constants used for minimum and maximum */ |
2508ce18 | 123 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f RT |
124 | static int sixty = 60; |
125 | #endif | |
126 | ||
270750db AT |
127 | static int __maybe_unused neg_one = -1; |
128 | ||
c4f3b63f | 129 | static int zero; |
cd5f9a4c LT |
130 | static int __maybe_unused one = 1; |
131 | static int __maybe_unused two = 2; | |
5509a5d2 | 132 | static int __maybe_unused four = 4; |
fc3501d4 | 133 | static unsigned long one_ul = 1; |
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 | |
357b57d7 TC |
227 | #ifdef CONFIG_X86 |
228 | int proc_dointvec_ibrs_ctrl(struct ctl_table *table, int write, | |
229 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
230 | int proc_dointvec_ibpb_ctrl(struct ctl_table *table, int write, | |
231 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
232 | int proc_dointvec_ibrs_dump(struct ctl_table *table, int write, | |
233 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
234 | #endif | |
235 | ||
97f5f0cd | 236 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 | 237 | /* Note: sysrq code uses it's own private copy */ |
8eaede49 | 238 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd | 239 | |
6f8fd1d7 | 240 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, |
97f5f0cd DT |
241 | void __user *buffer, size_t *lenp, |
242 | loff_t *ppos) | |
243 | { | |
244 | int error; | |
245 | ||
246 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
247 | if (error) | |
248 | return error; | |
249 | ||
250 | if (write) | |
251 | sysrq_toggle_support(__sysrq_enabled); | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | #endif | |
257 | ||
d8217f07 EB |
258 | static struct ctl_table kern_table[]; |
259 | static struct ctl_table vm_table[]; | |
260 | static struct ctl_table fs_table[]; | |
261 | static struct ctl_table debug_table[]; | |
262 | static struct ctl_table dev_table[]; | |
263 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
264 | #ifdef CONFIG_EPOLL |
265 | extern struct ctl_table epoll_table[]; | |
266 | #endif | |
1da177e4 LT |
267 | |
268 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
269 | int sysctl_legacy_va_layout; | |
270 | #endif | |
271 | ||
357b57d7 TC |
272 | u32 sysctl_ibrs_dump = 0; |
273 | u32 sysctl_ibrs_enabled = 0; | |
274 | EXPORT_SYMBOL(sysctl_ibrs_enabled); | |
275 | u32 sysctl_ibpb_enabled = 0; | |
276 | EXPORT_SYMBOL(sysctl_ibpb_enabled); | |
277 | ||
1da177e4 LT |
278 | /* The default sysctl tables: */ |
279 | ||
de4e83bd | 280 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 281 | { |
1da177e4 LT |
282 | .procname = "kernel", |
283 | .mode = 0555, | |
284 | .child = kern_table, | |
285 | }, | |
286 | { | |
1da177e4 LT |
287 | .procname = "vm", |
288 | .mode = 0555, | |
289 | .child = vm_table, | |
290 | }, | |
1da177e4 | 291 | { |
1da177e4 LT |
292 | .procname = "fs", |
293 | .mode = 0555, | |
294 | .child = fs_table, | |
295 | }, | |
296 | { | |
1da177e4 LT |
297 | .procname = "debug", |
298 | .mode = 0555, | |
299 | .child = debug_table, | |
300 | }, | |
301 | { | |
1da177e4 LT |
302 | .procname = "dev", |
303 | .mode = 0555, | |
304 | .child = dev_table, | |
305 | }, | |
6fce56ec | 306 | { } |
1da177e4 LT |
307 | }; |
308 | ||
77e54a1f | 309 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
310 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
311 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
312 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
313 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 314 | #ifdef CONFIG_SMP |
1983a922 CE |
315 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
316 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
317 | #endif /* CONFIG_SMP */ |
318 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 319 | |
5e771905 MG |
320 | #ifdef CONFIG_COMPACTION |
321 | static int min_extfrag_threshold; | |
322 | static int max_extfrag_threshold = 1000; | |
323 | #endif | |
324 | ||
d8217f07 | 325 | static struct ctl_table kern_table[] = { |
2bba22c5 | 326 | { |
2bba22c5 MG |
327 | .procname = "sched_child_runs_first", |
328 | .data = &sysctl_sched_child_runs_first, | |
329 | .maxlen = sizeof(unsigned int), | |
330 | .mode = 0644, | |
6d456111 | 331 | .proc_handler = proc_dointvec, |
2bba22c5 | 332 | }, |
77e54a1f IM |
333 | #ifdef CONFIG_SCHED_DEBUG |
334 | { | |
b2be5e96 PZ |
335 | .procname = "sched_min_granularity_ns", |
336 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
337 | .maxlen = sizeof(unsigned int), |
338 | .mode = 0644, | |
702a7c76 | 339 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
340 | .extra1 = &min_sched_granularity_ns, |
341 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 342 | }, |
21805085 | 343 | { |
21805085 PZ |
344 | .procname = "sched_latency_ns", |
345 | .data = &sysctl_sched_latency, | |
346 | .maxlen = sizeof(unsigned int), | |
347 | .mode = 0644, | |
702a7c76 | 348 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
349 | .extra1 = &min_sched_granularity_ns, |
350 | .extra2 = &max_sched_granularity_ns, | |
351 | }, | |
77e54a1f | 352 | { |
77e54a1f IM |
353 | .procname = "sched_wakeup_granularity_ns", |
354 | .data = &sysctl_sched_wakeup_granularity, | |
355 | .maxlen = sizeof(unsigned int), | |
356 | .mode = 0644, | |
702a7c76 | 357 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
358 | .extra1 = &min_wakeup_granularity_ns, |
359 | .extra2 = &max_wakeup_granularity_ns, | |
360 | }, | |
cbee9f88 | 361 | #ifdef CONFIG_SMP |
1983a922 | 362 | { |
1983a922 CE |
363 | .procname = "sched_tunable_scaling", |
364 | .data = &sysctl_sched_tunable_scaling, | |
365 | .maxlen = sizeof(enum sched_tunable_scaling), | |
366 | .mode = 0644, | |
702a7c76 | 367 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
368 | .extra1 = &min_sched_tunable_scaling, |
369 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 370 | }, |
da84d961 | 371 | { |
d00535db | 372 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
373 | .data = &sysctl_sched_migration_cost, |
374 | .maxlen = sizeof(unsigned int), | |
375 | .mode = 0644, | |
6d456111 | 376 | .proc_handler = proc_dointvec, |
da84d961 | 377 | }, |
b82d9fdd | 378 | { |
b82d9fdd PZ |
379 | .procname = "sched_nr_migrate", |
380 | .data = &sysctl_sched_nr_migrate, | |
381 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 382 | .mode = 0644, |
6d456111 | 383 | .proc_handler = proc_dointvec, |
fa85ae24 | 384 | }, |
e9e9250b | 385 | { |
d00535db | 386 | .procname = "sched_time_avg_ms", |
e9e9250b PZ |
387 | .data = &sysctl_sched_time_avg, |
388 | .maxlen = sizeof(unsigned int), | |
389 | .mode = 0644, | |
8105f577 EZ |
390 | .proc_handler = proc_dointvec_minmax, |
391 | .extra1 = &one, | |
e9e9250b | 392 | }, |
cb251765 MG |
393 | #ifdef CONFIG_SCHEDSTATS |
394 | { | |
395 | .procname = "sched_schedstats", | |
396 | .data = NULL, | |
397 | .maxlen = sizeof(unsigned int), | |
398 | .mode = 0644, | |
399 | .proc_handler = sysctl_schedstats, | |
400 | .extra1 = &zero, | |
401 | .extra2 = &one, | |
402 | }, | |
403 | #endif /* CONFIG_SCHEDSTATS */ | |
cbee9f88 PZ |
404 | #endif /* CONFIG_SMP */ |
405 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
406 | { |
407 | .procname = "numa_balancing_scan_delay_ms", | |
408 | .data = &sysctl_numa_balancing_scan_delay, | |
409 | .maxlen = sizeof(unsigned int), | |
410 | .mode = 0644, | |
411 | .proc_handler = proc_dointvec, | |
412 | }, | |
cbee9f88 PZ |
413 | { |
414 | .procname = "numa_balancing_scan_period_min_ms", | |
415 | .data = &sysctl_numa_balancing_scan_period_min, | |
416 | .maxlen = sizeof(unsigned int), | |
417 | .mode = 0644, | |
418 | .proc_handler = proc_dointvec, | |
419 | }, | |
420 | { | |
421 | .procname = "numa_balancing_scan_period_max_ms", | |
422 | .data = &sysctl_numa_balancing_scan_period_max, | |
423 | .maxlen = sizeof(unsigned int), | |
424 | .mode = 0644, | |
425 | .proc_handler = proc_dointvec, | |
426 | }, | |
6e5fb223 PZ |
427 | { |
428 | .procname = "numa_balancing_scan_size_mb", | |
429 | .data = &sysctl_numa_balancing_scan_size, | |
430 | .maxlen = sizeof(unsigned int), | |
431 | .mode = 0644, | |
64192658 KT |
432 | .proc_handler = proc_dointvec_minmax, |
433 | .extra1 = &one, | |
6e5fb223 | 434 | }, |
54a43d54 AK |
435 | { |
436 | .procname = "numa_balancing", | |
437 | .data = NULL, /* filled in by handler */ | |
438 | .maxlen = sizeof(unsigned int), | |
439 | .mode = 0644, | |
440 | .proc_handler = sysctl_numa_balancing, | |
441 | .extra1 = &zero, | |
442 | .extra2 = &one, | |
443 | }, | |
cbee9f88 PZ |
444 | #endif /* CONFIG_NUMA_BALANCING */ |
445 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 446 | { |
9f0c1e56 PZ |
447 | .procname = "sched_rt_period_us", |
448 | .data = &sysctl_sched_rt_period, | |
449 | .maxlen = sizeof(unsigned int), | |
450 | .mode = 0644, | |
6d456111 | 451 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
452 | }, |
453 | { | |
9f0c1e56 PZ |
454 | .procname = "sched_rt_runtime_us", |
455 | .data = &sysctl_sched_rt_runtime, | |
456 | .maxlen = sizeof(int), | |
457 | .mode = 0644, | |
6d456111 | 458 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 459 | }, |
ce0dbbbb CW |
460 | { |
461 | .procname = "sched_rr_timeslice_ms", | |
975e155e | 462 | .data = &sysctl_sched_rr_timeslice, |
ce0dbbbb CW |
463 | .maxlen = sizeof(int), |
464 | .mode = 0644, | |
465 | .proc_handler = sched_rr_handler, | |
466 | }, | |
5091faa4 MG |
467 | #ifdef CONFIG_SCHED_AUTOGROUP |
468 | { | |
469 | .procname = "sched_autogroup_enabled", | |
470 | .data = &sysctl_sched_autogroup_enabled, | |
471 | .maxlen = sizeof(unsigned int), | |
472 | .mode = 0644, | |
1747b21f | 473 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
474 | .extra1 = &zero, |
475 | .extra2 = &one, | |
476 | }, | |
477 | #endif | |
ec12cb7f PT |
478 | #ifdef CONFIG_CFS_BANDWIDTH |
479 | { | |
480 | .procname = "sched_cfs_bandwidth_slice_us", | |
481 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
482 | .maxlen = sizeof(unsigned int), | |
483 | .mode = 0644, | |
484 | .proc_handler = proc_dointvec_minmax, | |
485 | .extra1 = &one, | |
486 | }, | |
487 | #endif | |
f20786ff PZ |
488 | #ifdef CONFIG_PROVE_LOCKING |
489 | { | |
f20786ff PZ |
490 | .procname = "prove_locking", |
491 | .data = &prove_locking, | |
492 | .maxlen = sizeof(int), | |
493 | .mode = 0644, | |
6d456111 | 494 | .proc_handler = proc_dointvec, |
f20786ff PZ |
495 | }, |
496 | #endif | |
497 | #ifdef CONFIG_LOCK_STAT | |
498 | { | |
f20786ff PZ |
499 | .procname = "lock_stat", |
500 | .data = &lock_stat, | |
501 | .maxlen = sizeof(int), | |
502 | .mode = 0644, | |
6d456111 | 503 | .proc_handler = proc_dointvec, |
f20786ff | 504 | }, |
77e54a1f | 505 | #endif |
1da177e4 | 506 | { |
1da177e4 LT |
507 | .procname = "panic", |
508 | .data = &panic_timeout, | |
509 | .maxlen = sizeof(int), | |
510 | .mode = 0644, | |
6d456111 | 511 | .proc_handler = proc_dointvec, |
1da177e4 | 512 | }, |
046d662f | 513 | #ifdef CONFIG_COREDUMP |
1da177e4 | 514 | { |
1da177e4 LT |
515 | .procname = "core_uses_pid", |
516 | .data = &core_uses_pid, | |
517 | .maxlen = sizeof(int), | |
518 | .mode = 0644, | |
6d456111 | 519 | .proc_handler = proc_dointvec, |
1da177e4 LT |
520 | }, |
521 | { | |
1da177e4 LT |
522 | .procname = "core_pattern", |
523 | .data = core_pattern, | |
71ce92f3 | 524 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 525 | .mode = 0644, |
54b50199 | 526 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 527 | }, |
a293980c | 528 | { |
a293980c NH |
529 | .procname = "core_pipe_limit", |
530 | .data = &core_pipe_limit, | |
531 | .maxlen = sizeof(unsigned int), | |
532 | .mode = 0644, | |
6d456111 | 533 | .proc_handler = proc_dointvec, |
a293980c | 534 | }, |
046d662f | 535 | #endif |
8fa8a002 SH |
536 | #ifdef CONFIG_USER_NS |
537 | { | |
538 | .procname = "unprivileged_userns_clone", | |
539 | .data = &unprivileged_userns_clone, | |
540 | .maxlen = sizeof(int), | |
541 | .mode = 0644, | |
542 | .proc_handler = proc_dointvec, | |
543 | }, | |
544 | #endif | |
34f5a398 | 545 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 546 | { |
1da177e4 | 547 | .procname = "tainted", |
25ddbb18 | 548 | .maxlen = sizeof(long), |
34f5a398 | 549 | .mode = 0644, |
6d456111 | 550 | .proc_handler = proc_taint, |
1da177e4 | 551 | }, |
f4aacea2 KC |
552 | { |
553 | .procname = "sysctl_writes_strict", | |
554 | .data = &sysctl_writes_strict, | |
555 | .maxlen = sizeof(int), | |
556 | .mode = 0644, | |
557 | .proc_handler = proc_dointvec_minmax, | |
558 | .extra1 = &neg_one, | |
559 | .extra2 = &one, | |
560 | }, | |
34f5a398 | 561 | #endif |
9745512c AV |
562 | #ifdef CONFIG_LATENCYTOP |
563 | { | |
564 | .procname = "latencytop", | |
565 | .data = &latencytop_enabled, | |
566 | .maxlen = sizeof(int), | |
567 | .mode = 0644, | |
cb251765 | 568 | .proc_handler = sysctl_latencytop, |
9745512c AV |
569 | }, |
570 | #endif | |
1da177e4 LT |
571 | #ifdef CONFIG_BLK_DEV_INITRD |
572 | { | |
1da177e4 LT |
573 | .procname = "real-root-dev", |
574 | .data = &real_root_dev, | |
575 | .maxlen = sizeof(int), | |
576 | .mode = 0644, | |
6d456111 | 577 | .proc_handler = proc_dointvec, |
1da177e4 LT |
578 | }, |
579 | #endif | |
45807a1d | 580 | { |
45807a1d IM |
581 | .procname = "print-fatal-signals", |
582 | .data = &print_fatal_signals, | |
583 | .maxlen = sizeof(int), | |
584 | .mode = 0644, | |
6d456111 | 585 | .proc_handler = proc_dointvec, |
45807a1d | 586 | }, |
72c57ed5 | 587 | #ifdef CONFIG_SPARC |
1da177e4 | 588 | { |
1da177e4 LT |
589 | .procname = "reboot-cmd", |
590 | .data = reboot_command, | |
591 | .maxlen = 256, | |
592 | .mode = 0644, | |
6d456111 | 593 | .proc_handler = proc_dostring, |
1da177e4 LT |
594 | }, |
595 | { | |
1da177e4 LT |
596 | .procname = "stop-a", |
597 | .data = &stop_a_enabled, | |
598 | .maxlen = sizeof (int), | |
599 | .mode = 0644, | |
6d456111 | 600 | .proc_handler = proc_dointvec, |
1da177e4 LT |
601 | }, |
602 | { | |
1da177e4 LT |
603 | .procname = "scons-poweroff", |
604 | .data = &scons_pwroff, | |
605 | .maxlen = sizeof (int), | |
606 | .mode = 0644, | |
6d456111 | 607 | .proc_handler = proc_dointvec, |
1da177e4 LT |
608 | }, |
609 | #endif | |
0871420f DM |
610 | #ifdef CONFIG_SPARC64 |
611 | { | |
0871420f DM |
612 | .procname = "tsb-ratio", |
613 | .data = &sysctl_tsb_ratio, | |
614 | .maxlen = sizeof (int), | |
615 | .mode = 0644, | |
6d456111 | 616 | .proc_handler = proc_dointvec, |
0871420f DM |
617 | }, |
618 | #endif | |
1da177e4 LT |
619 | #ifdef __hppa__ |
620 | { | |
1da177e4 LT |
621 | .procname = "soft-power", |
622 | .data = &pwrsw_enabled, | |
623 | .maxlen = sizeof (int), | |
624 | .mode = 0644, | |
6d456111 | 625 | .proc_handler = proc_dointvec, |
1da177e4 | 626 | }, |
bf14e3b9 VG |
627 | #endif |
628 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 629 | { |
1da177e4 LT |
630 | .procname = "unaligned-trap", |
631 | .data = &unaligned_enabled, | |
632 | .maxlen = sizeof (int), | |
633 | .mode = 0644, | |
6d456111 | 634 | .proc_handler = proc_dointvec, |
1da177e4 LT |
635 | }, |
636 | #endif | |
637 | { | |
1da177e4 LT |
638 | .procname = "ctrl-alt-del", |
639 | .data = &C_A_D, | |
640 | .maxlen = sizeof(int), | |
641 | .mode = 0644, | |
6d456111 | 642 | .proc_handler = proc_dointvec, |
1da177e4 | 643 | }, |
606576ce | 644 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 645 | { |
b0fc494f SR |
646 | .procname = "ftrace_enabled", |
647 | .data = &ftrace_enabled, | |
648 | .maxlen = sizeof(int), | |
649 | .mode = 0644, | |
6d456111 | 650 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
651 | }, |
652 | #endif | |
f38f1d2a SR |
653 | #ifdef CONFIG_STACK_TRACER |
654 | { | |
f38f1d2a SR |
655 | .procname = "stack_tracer_enabled", |
656 | .data = &stack_tracer_enabled, | |
657 | .maxlen = sizeof(int), | |
658 | .mode = 0644, | |
6d456111 | 659 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
660 | }, |
661 | #endif | |
944ac425 SR |
662 | #ifdef CONFIG_TRACING |
663 | { | |
3299b4dd | 664 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
665 | .data = &ftrace_dump_on_oops, |
666 | .maxlen = sizeof(int), | |
667 | .mode = 0644, | |
6d456111 | 668 | .proc_handler = proc_dointvec, |
944ac425 | 669 | }, |
de7edd31 SRRH |
670 | { |
671 | .procname = "traceoff_on_warning", | |
672 | .data = &__disable_trace_on_warning, | |
673 | .maxlen = sizeof(__disable_trace_on_warning), | |
674 | .mode = 0644, | |
675 | .proc_handler = proc_dointvec, | |
676 | }, | |
0daa2302 SRRH |
677 | { |
678 | .procname = "tracepoint_printk", | |
679 | .data = &tracepoint_printk, | |
680 | .maxlen = sizeof(tracepoint_printk), | |
681 | .mode = 0644, | |
42391745 | 682 | .proc_handler = tracepoint_printk_sysctl, |
0daa2302 | 683 | }, |
944ac425 | 684 | #endif |
2965faa5 | 685 | #ifdef CONFIG_KEXEC_CORE |
7984754b KC |
686 | { |
687 | .procname = "kexec_load_disabled", | |
688 | .data = &kexec_load_disabled, | |
689 | .maxlen = sizeof(int), | |
690 | .mode = 0644, | |
691 | /* only handle a transition from default "0" to "1" */ | |
692 | .proc_handler = proc_dointvec_minmax, | |
693 | .extra1 = &one, | |
694 | .extra2 = &one, | |
695 | }, | |
696 | #endif | |
a1ef5adb | 697 | #ifdef CONFIG_MODULES |
1da177e4 | 698 | { |
1da177e4 LT |
699 | .procname = "modprobe", |
700 | .data = &modprobe_path, | |
701 | .maxlen = KMOD_PATH_LEN, | |
702 | .mode = 0644, | |
6d456111 | 703 | .proc_handler = proc_dostring, |
1da177e4 | 704 | }, |
3d43321b | 705 | { |
3d43321b KC |
706 | .procname = "modules_disabled", |
707 | .data = &modules_disabled, | |
708 | .maxlen = sizeof(int), | |
709 | .mode = 0644, | |
710 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 711 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
712 | .extra1 = &one, |
713 | .extra2 = &one, | |
714 | }, | |
1da177e4 | 715 | #endif |
86d56134 | 716 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 717 | { |
1da177e4 | 718 | .procname = "hotplug", |
312c004d KS |
719 | .data = &uevent_helper, |
720 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 721 | .mode = 0644, |
6d456111 | 722 | .proc_handler = proc_dostring, |
1da177e4 | 723 | }, |
86d56134 | 724 | #endif |
1da177e4 LT |
725 | #ifdef CONFIG_CHR_DEV_SG |
726 | { | |
1da177e4 LT |
727 | .procname = "sg-big-buff", |
728 | .data = &sg_big_buff, | |
729 | .maxlen = sizeof (int), | |
730 | .mode = 0444, | |
6d456111 | 731 | .proc_handler = proc_dointvec, |
1da177e4 LT |
732 | }, |
733 | #endif | |
734 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
735 | { | |
1da177e4 LT |
736 | .procname = "acct", |
737 | .data = &acct_parm, | |
738 | .maxlen = 3*sizeof(int), | |
739 | .mode = 0644, | |
6d456111 | 740 | .proc_handler = proc_dointvec, |
1da177e4 LT |
741 | }, |
742 | #endif | |
1da177e4 LT |
743 | #ifdef CONFIG_MAGIC_SYSRQ |
744 | { | |
1da177e4 | 745 | .procname = "sysrq", |
5d6f647f | 746 | .data = &__sysrq_enabled, |
1da177e4 LT |
747 | .maxlen = sizeof (int), |
748 | .mode = 0644, | |
97f5f0cd | 749 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
750 | }, |
751 | #endif | |
d6f8ff73 | 752 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 753 | { |
1da177e4 | 754 | .procname = "cad_pid", |
9ec52099 | 755 | .data = NULL, |
1da177e4 LT |
756 | .maxlen = sizeof (int), |
757 | .mode = 0600, | |
6d456111 | 758 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 759 | }, |
d6f8ff73 | 760 | #endif |
1da177e4 | 761 | { |
1da177e4 | 762 | .procname = "threads-max", |
16db3d3f | 763 | .data = NULL, |
1da177e4 LT |
764 | .maxlen = sizeof(int), |
765 | .mode = 0644, | |
16db3d3f | 766 | .proc_handler = sysctl_max_threads, |
1da177e4 LT |
767 | }, |
768 | { | |
1da177e4 LT |
769 | .procname = "random", |
770 | .mode = 0555, | |
771 | .child = random_table, | |
772 | }, | |
17f60a7d EP |
773 | { |
774 | .procname = "usermodehelper", | |
775 | .mode = 0555, | |
776 | .child = usermodehelper_table, | |
777 | }, | |
1da177e4 | 778 | { |
1da177e4 LT |
779 | .procname = "overflowuid", |
780 | .data = &overflowuid, | |
781 | .maxlen = sizeof(int), | |
782 | .mode = 0644, | |
6d456111 | 783 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
784 | .extra1 = &minolduid, |
785 | .extra2 = &maxolduid, | |
786 | }, | |
787 | { | |
1da177e4 LT |
788 | .procname = "overflowgid", |
789 | .data = &overflowgid, | |
790 | .maxlen = sizeof(int), | |
791 | .mode = 0644, | |
6d456111 | 792 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
793 | .extra1 = &minolduid, |
794 | .extra2 = &maxolduid, | |
795 | }, | |
347a8dc3 | 796 | #ifdef CONFIG_S390 |
1da177e4 LT |
797 | #ifdef CONFIG_MATHEMU |
798 | { | |
1da177e4 LT |
799 | .procname = "ieee_emulation_warnings", |
800 | .data = &sysctl_ieee_emulation_warnings, | |
801 | .maxlen = sizeof(int), | |
802 | .mode = 0644, | |
6d456111 | 803 | .proc_handler = proc_dointvec, |
1da177e4 | 804 | }, |
1da177e4 LT |
805 | #endif |
806 | { | |
1da177e4 | 807 | .procname = "userprocess_debug", |
ab3c68ee | 808 | .data = &show_unhandled_signals, |
1da177e4 LT |
809 | .maxlen = sizeof(int), |
810 | .mode = 0644, | |
6d456111 | 811 | .proc_handler = proc_dointvec, |
1da177e4 LT |
812 | }, |
813 | #endif | |
814 | { | |
1da177e4 LT |
815 | .procname = "pid_max", |
816 | .data = &pid_max, | |
817 | .maxlen = sizeof (int), | |
818 | .mode = 0644, | |
6d456111 | 819 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
820 | .extra1 = &pid_max_min, |
821 | .extra2 = &pid_max_max, | |
822 | }, | |
823 | { | |
1da177e4 LT |
824 | .procname = "panic_on_oops", |
825 | .data = &panic_on_oops, | |
826 | .maxlen = sizeof(int), | |
827 | .mode = 0644, | |
6d456111 | 828 | .proc_handler = proc_dointvec, |
1da177e4 | 829 | }, |
7ef3d2fd JP |
830 | #if defined CONFIG_PRINTK |
831 | { | |
7ef3d2fd JP |
832 | .procname = "printk", |
833 | .data = &console_loglevel, | |
834 | .maxlen = 4*sizeof(int), | |
835 | .mode = 0644, | |
6d456111 | 836 | .proc_handler = proc_dointvec, |
7ef3d2fd | 837 | }, |
1da177e4 | 838 | { |
1da177e4 | 839 | .procname = "printk_ratelimit", |
717115e1 | 840 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
841 | .maxlen = sizeof(int), |
842 | .mode = 0644, | |
6d456111 | 843 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
844 | }, |
845 | { | |
1da177e4 | 846 | .procname = "printk_ratelimit_burst", |
717115e1 | 847 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
848 | .maxlen = sizeof(int), |
849 | .mode = 0644, | |
6d456111 | 850 | .proc_handler = proc_dointvec, |
1da177e4 | 851 | }, |
af91322e | 852 | { |
af91322e DY |
853 | .procname = "printk_delay", |
854 | .data = &printk_delay_msec, | |
855 | .maxlen = sizeof(int), | |
856 | .mode = 0644, | |
6d456111 | 857 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
858 | .extra1 = &zero, |
859 | .extra2 = &ten_thousand, | |
860 | }, | |
750afe7b BP |
861 | { |
862 | .procname = "printk_devkmsg", | |
863 | .data = devkmsg_log_str, | |
864 | .maxlen = DEVKMSG_STR_MAX_SIZE, | |
865 | .mode = 0644, | |
866 | .proc_handler = devkmsg_sysctl_set_loglvl, | |
867 | }, | |
eaf06b24 DR |
868 | { |
869 | .procname = "dmesg_restrict", | |
870 | .data = &dmesg_restrict, | |
871 | .maxlen = sizeof(int), | |
872 | .mode = 0644, | |
620f6e8e | 873 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
874 | .extra1 = &zero, |
875 | .extra2 = &one, | |
876 | }, | |
455cd5ab DR |
877 | { |
878 | .procname = "kptr_restrict", | |
879 | .data = &kptr_restrict, | |
880 | .maxlen = sizeof(int), | |
881 | .mode = 0644, | |
620f6e8e | 882 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
883 | .extra1 = &zero, |
884 | .extra2 = &two, | |
885 | }, | |
df6e61d4 | 886 | #endif |
1da177e4 | 887 | { |
1da177e4 LT |
888 | .procname = "ngroups_max", |
889 | .data = &ngroups_max, | |
890 | .maxlen = sizeof (int), | |
891 | .mode = 0444, | |
6d456111 | 892 | .proc_handler = proc_dointvec, |
1da177e4 | 893 | }, |
73efc039 DB |
894 | { |
895 | .procname = "cap_last_cap", | |
896 | .data = (void *)&cap_last_cap, | |
897 | .maxlen = sizeof(int), | |
898 | .mode = 0444, | |
899 | .proc_handler = proc_dointvec, | |
900 | }, | |
58687acb | 901 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 902 | { |
58687acb | 903 | .procname = "watchdog", |
3c00ea82 | 904 | .data = &watchdog_user_enabled, |
504d7cf1 DZ |
905 | .maxlen = sizeof (int), |
906 | .mode = 0644, | |
195daf66 | 907 | .proc_handler = proc_watchdog, |
586692a5 MSB |
908 | .extra1 = &zero, |
909 | .extra2 = &one, | |
58687acb DZ |
910 | }, |
911 | { | |
912 | .procname = "watchdog_thresh", | |
586692a5 | 913 | .data = &watchdog_thresh, |
58687acb DZ |
914 | .maxlen = sizeof(int), |
915 | .mode = 0644, | |
195daf66 | 916 | .proc_handler = proc_watchdog_thresh, |
a6572f84 | 917 | .extra1 = &zero, |
58687acb | 918 | .extra2 = &sixty, |
504d7cf1 | 919 | }, |
195daf66 UO |
920 | { |
921 | .procname = "nmi_watchdog", | |
922 | .data = &nmi_watchdog_enabled, | |
923 | .maxlen = sizeof (int), | |
924 | .mode = 0644, | |
925 | .proc_handler = proc_nmi_watchdog, | |
926 | .extra1 = &zero, | |
927 | #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) | |
928 | .extra2 = &one, | |
929 | #else | |
930 | .extra2 = &zero, | |
931 | #endif | |
932 | }, | |
05a4a952 NP |
933 | { |
934 | .procname = "watchdog_cpumask", | |
935 | .data = &watchdog_cpumask_bits, | |
936 | .maxlen = NR_CPUS, | |
937 | .mode = 0644, | |
938 | .proc_handler = proc_watchdog_cpumask, | |
939 | }, | |
940 | #ifdef CONFIG_SOFTLOCKUP_DETECTOR | |
195daf66 UO |
941 | { |
942 | .procname = "soft_watchdog", | |
943 | .data = &soft_watchdog_enabled, | |
944 | .maxlen = sizeof (int), | |
945 | .mode = 0644, | |
946 | .proc_handler = proc_soft_watchdog, | |
947 | .extra1 = &zero, | |
948 | .extra2 = &one, | |
949 | }, | |
2508ce18 DZ |
950 | { |
951 | .procname = "softlockup_panic", | |
952 | .data = &softlockup_panic, | |
953 | .maxlen = sizeof(int), | |
954 | .mode = 0644, | |
955 | .proc_handler = proc_dointvec_minmax, | |
956 | .extra1 = &zero, | |
957 | .extra2 = &one, | |
958 | }, | |
05a4a952 | 959 | #ifdef CONFIG_SMP |
ac1f5912 | 960 | { |
05a4a952 NP |
961 | .procname = "softlockup_all_cpu_backtrace", |
962 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
ac1f5912 DZ |
963 | .maxlen = sizeof(int), |
964 | .mode = 0644, | |
965 | .proc_handler = proc_dointvec_minmax, | |
966 | .extra1 = &zero, | |
967 | .extra2 = &one, | |
968 | }, | |
05a4a952 | 969 | #endif /* CONFIG_SMP */ |
ac1f5912 | 970 | #endif |
05a4a952 | 971 | #ifdef CONFIG_HARDLOCKUP_DETECTOR |
ed235875 | 972 | { |
05a4a952 NP |
973 | .procname = "hardlockup_panic", |
974 | .data = &hardlockup_panic, | |
ed235875 AT |
975 | .maxlen = sizeof(int), |
976 | .mode = 0644, | |
977 | .proc_handler = proc_dointvec_minmax, | |
978 | .extra1 = &zero, | |
979 | .extra2 = &one, | |
980 | }, | |
05a4a952 | 981 | #ifdef CONFIG_SMP |
55537871 JK |
982 | { |
983 | .procname = "hardlockup_all_cpu_backtrace", | |
984 | .data = &sysctl_hardlockup_all_cpu_backtrace, | |
985 | .maxlen = sizeof(int), | |
986 | .mode = 0644, | |
987 | .proc_handler = proc_dointvec_minmax, | |
988 | .extra1 = &zero, | |
989 | .extra2 = &one, | |
990 | }, | |
ed235875 | 991 | #endif /* CONFIG_SMP */ |
5dc30558 | 992 | #endif |
05a4a952 NP |
993 | #endif |
994 | ||
5dc30558 DZ |
995 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) |
996 | { | |
997 | .procname = "unknown_nmi_panic", | |
998 | .data = &unknown_nmi_panic, | |
999 | .maxlen = sizeof (int), | |
1000 | .mode = 0644, | |
1001 | .proc_handler = proc_dointvec, | |
1002 | }, | |
504d7cf1 | 1003 | #endif |
1da177e4 | 1004 | #if defined(CONFIG_X86) |
8da5adda | 1005 | { |
8da5adda DZ |
1006 | .procname = "panic_on_unrecovered_nmi", |
1007 | .data = &panic_on_unrecovered_nmi, | |
1008 | .maxlen = sizeof(int), | |
1009 | .mode = 0644, | |
6d456111 | 1010 | .proc_handler = proc_dointvec, |
8da5adda | 1011 | }, |
5211a242 | 1012 | { |
5211a242 KG |
1013 | .procname = "panic_on_io_nmi", |
1014 | .data = &panic_on_io_nmi, | |
1015 | .maxlen = sizeof(int), | |
1016 | .mode = 0644, | |
6d456111 | 1017 | .proc_handler = proc_dointvec, |
5211a242 | 1018 | }, |
55af7796 MH |
1019 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
1020 | { | |
1021 | .procname = "panic_on_stackoverflow", | |
1022 | .data = &sysctl_panic_on_stackoverflow, | |
1023 | .maxlen = sizeof(int), | |
1024 | .mode = 0644, | |
1025 | .proc_handler = proc_dointvec, | |
1026 | }, | |
1027 | #endif | |
1da177e4 | 1028 | { |
1da177e4 LT |
1029 | .procname = "bootloader_type", |
1030 | .data = &bootloader_type, | |
1031 | .maxlen = sizeof (int), | |
1032 | .mode = 0444, | |
6d456111 | 1033 | .proc_handler = proc_dointvec, |
1da177e4 | 1034 | }, |
5031296c | 1035 | { |
5031296c PA |
1036 | .procname = "bootloader_version", |
1037 | .data = &bootloader_version, | |
1038 | .maxlen = sizeof (int), | |
1039 | .mode = 0444, | |
6d456111 | 1040 | .proc_handler = proc_dointvec, |
5031296c | 1041 | }, |
6e7c4025 | 1042 | { |
6e7c4025 IM |
1043 | .procname = "io_delay_type", |
1044 | .data = &io_delay_type, | |
1045 | .maxlen = sizeof(int), | |
1046 | .mode = 0644, | |
6d456111 | 1047 | .proc_handler = proc_dointvec, |
6e7c4025 | 1048 | }, |
1da177e4 | 1049 | #endif |
7a9166e3 | 1050 | #if defined(CONFIG_MMU) |
1da177e4 | 1051 | { |
1da177e4 LT |
1052 | .procname = "randomize_va_space", |
1053 | .data = &randomize_va_space, | |
1054 | .maxlen = sizeof(int), | |
1055 | .mode = 0644, | |
6d456111 | 1056 | .proc_handler = proc_dointvec, |
1da177e4 | 1057 | }, |
7a9166e3 | 1058 | #endif |
0152fb37 | 1059 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 1060 | { |
951f22d5 MS |
1061 | .procname = "spin_retry", |
1062 | .data = &spin_retry, | |
1063 | .maxlen = sizeof (int), | |
1064 | .mode = 0644, | |
6d456111 | 1065 | .proc_handler = proc_dointvec, |
951f22d5 | 1066 | }, |
c255d844 | 1067 | #endif |
673d5b43 | 1068 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 1069 | { |
c255d844 | 1070 | .procname = "acpi_video_flags", |
77afcf78 | 1071 | .data = &acpi_realmode_flags, |
c255d844 PM |
1072 | .maxlen = sizeof (unsigned long), |
1073 | .mode = 0644, | |
6d456111 | 1074 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 1075 | }, |
d2b176ed | 1076 | #endif |
b6fca725 | 1077 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 1078 | { |
d2b176ed JS |
1079 | .procname = "ignore-unaligned-usertrap", |
1080 | .data = &no_unaligned_warning, | |
1081 | .maxlen = sizeof (int), | |
1082 | .mode = 0644, | |
6d456111 | 1083 | .proc_handler = proc_dointvec, |
d2b176ed | 1084 | }, |
b6fca725 VG |
1085 | #endif |
1086 | #ifdef CONFIG_IA64 | |
88fc241f | 1087 | { |
88fc241f DC |
1088 | .procname = "unaligned-dump-stack", |
1089 | .data = &unaligned_dump_stack, | |
1090 | .maxlen = sizeof (int), | |
1091 | .mode = 0644, | |
6d456111 | 1092 | .proc_handler = proc_dointvec, |
88fc241f | 1093 | }, |
bebfa101 | 1094 | #endif |
e162b39a MSB |
1095 | #ifdef CONFIG_DETECT_HUNG_TASK |
1096 | { | |
e162b39a MSB |
1097 | .procname = "hung_task_panic", |
1098 | .data = &sysctl_hung_task_panic, | |
1099 | .maxlen = sizeof(int), | |
1100 | .mode = 0644, | |
6d456111 | 1101 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
1102 | .extra1 = &zero, |
1103 | .extra2 = &one, | |
1104 | }, | |
82a1fcb9 | 1105 | { |
82a1fcb9 IM |
1106 | .procname = "hung_task_check_count", |
1107 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 1108 | .maxlen = sizeof(int), |
82a1fcb9 | 1109 | .mode = 0644, |
cd64647f LZ |
1110 | .proc_handler = proc_dointvec_minmax, |
1111 | .extra1 = &zero, | |
82a1fcb9 IM |
1112 | }, |
1113 | { | |
82a1fcb9 IM |
1114 | .procname = "hung_task_timeout_secs", |
1115 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1116 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1117 | .mode = 0644, |
6d456111 | 1118 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1119 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
1120 | }, |
1121 | { | |
82a1fcb9 IM |
1122 | .procname = "hung_task_warnings", |
1123 | .data = &sysctl_hung_task_warnings, | |
270750db | 1124 | .maxlen = sizeof(int), |
82a1fcb9 | 1125 | .mode = 0644, |
270750db AT |
1126 | .proc_handler = proc_dointvec_minmax, |
1127 | .extra1 = &neg_one, | |
82a1fcb9 | 1128 | }, |
c4f3b63f | 1129 | #endif |
23f78d4a IM |
1130 | #ifdef CONFIG_RT_MUTEXES |
1131 | { | |
23f78d4a IM |
1132 | .procname = "max_lock_depth", |
1133 | .data = &max_lock_depth, | |
1134 | .maxlen = sizeof(int), | |
1135 | .mode = 0644, | |
6d456111 | 1136 | .proc_handler = proc_dointvec, |
23f78d4a | 1137 | }, |
5096add8 | 1138 | #endif |
10a0a8d4 | 1139 | { |
10a0a8d4 JF |
1140 | .procname = "poweroff_cmd", |
1141 | .data = &poweroff_cmd, | |
1142 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1143 | .mode = 0644, | |
6d456111 | 1144 | .proc_handler = proc_dostring, |
10a0a8d4 | 1145 | }, |
0b77f5bf DH |
1146 | #ifdef CONFIG_KEYS |
1147 | { | |
0b77f5bf DH |
1148 | .procname = "keys", |
1149 | .mode = 0555, | |
1150 | .child = key_sysctls, | |
1151 | }, | |
1152 | #endif | |
cdd6c482 | 1153 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1154 | /* |
1155 | * User-space scripts rely on the existence of this file | |
1156 | * as a feature check for perf_events being enabled. | |
1157 | * | |
1158 | * So it's an ABI, do not remove! | |
1159 | */ | |
1ccd1549 | 1160 | { |
cdd6c482 IM |
1161 | .procname = "perf_event_paranoid", |
1162 | .data = &sysctl_perf_event_paranoid, | |
1163 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1164 | .mode = 0644, |
6d456111 | 1165 | .proc_handler = proc_dointvec, |
1ccd1549 | 1166 | }, |
c5078f78 | 1167 | { |
cdd6c482 IM |
1168 | .procname = "perf_event_mlock_kb", |
1169 | .data = &sysctl_perf_event_mlock, | |
1170 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1171 | .mode = 0644, |
6d456111 | 1172 | .proc_handler = proc_dointvec, |
c5078f78 | 1173 | }, |
a78ac325 | 1174 | { |
cdd6c482 IM |
1175 | .procname = "perf_event_max_sample_rate", |
1176 | .data = &sysctl_perf_event_sample_rate, | |
1177 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1178 | .mode = 0644, |
163ec435 | 1179 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1180 | .extra1 = &one, |
a78ac325 | 1181 | }, |
14c63f17 DH |
1182 | { |
1183 | .procname = "perf_cpu_time_max_percent", | |
1184 | .data = &sysctl_perf_cpu_time_max_percent, | |
1185 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1186 | .mode = 0644, | |
1187 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1188 | .extra1 = &zero, | |
1189 | .extra2 = &one_hundred, | |
1190 | }, | |
c5dfd78e ACM |
1191 | { |
1192 | .procname = "perf_event_max_stack", | |
a831100a | 1193 | .data = &sysctl_perf_event_max_stack, |
c5dfd78e ACM |
1194 | .maxlen = sizeof(sysctl_perf_event_max_stack), |
1195 | .mode = 0644, | |
1196 | .proc_handler = perf_event_max_stack_handler, | |
1197 | .extra1 = &zero, | |
1198 | .extra2 = &six_hundred_forty_kb, | |
1199 | }, | |
c85b0334 ACM |
1200 | { |
1201 | .procname = "perf_event_max_contexts_per_stack", | |
1202 | .data = &sysctl_perf_event_max_contexts_per_stack, | |
1203 | .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack), | |
1204 | .mode = 0644, | |
1205 | .proc_handler = perf_event_max_stack_handler, | |
1206 | .extra1 = &zero, | |
1207 | .extra2 = &one_thousand, | |
1208 | }, | |
1ccd1549 | 1209 | #endif |
dfec072e VN |
1210 | #ifdef CONFIG_KMEMCHECK |
1211 | { | |
dfec072e VN |
1212 | .procname = "kmemcheck", |
1213 | .data = &kmemcheck_enabled, | |
1214 | .maxlen = sizeof(int), | |
1215 | .mode = 0644, | |
6d456111 | 1216 | .proc_handler = proc_dointvec, |
dfec072e | 1217 | }, |
cb684b5b | 1218 | #endif |
9e3961a0 PB |
1219 | { |
1220 | .procname = "panic_on_warn", | |
1221 | .data = &panic_on_warn, | |
1222 | .maxlen = sizeof(int), | |
1223 | .mode = 0644, | |
1224 | .proc_handler = proc_dointvec_minmax, | |
1225 | .extra1 = &zero, | |
1226 | .extra2 = &one, | |
1227 | }, | |
bc7a34b8 TG |
1228 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) |
1229 | { | |
1230 | .procname = "timer_migration", | |
1231 | .data = &sysctl_timer_migration, | |
1232 | .maxlen = sizeof(unsigned int), | |
1233 | .mode = 0644, | |
1234 | .proc_handler = timer_migration_handler, | |
b94bf594 MJ |
1235 | .extra1 = &zero, |
1236 | .extra2 = &one, | |
bc7a34b8 | 1237 | }, |
1be7f75d AS |
1238 | #endif |
1239 | #ifdef CONFIG_BPF_SYSCALL | |
1240 | { | |
1241 | .procname = "unprivileged_bpf_disabled", | |
1242 | .data = &sysctl_unprivileged_bpf_disabled, | |
1243 | .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), | |
1244 | .mode = 0644, | |
1245 | /* only handle a transition from default "0" to "1" */ | |
1246 | .proc_handler = proc_dointvec_minmax, | |
1247 | .extra1 = &one, | |
1248 | .extra2 = &one, | |
1249 | }, | |
088e9d25 DBO |
1250 | #endif |
1251 | #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) | |
1252 | { | |
1253 | .procname = "panic_on_rcu_stall", | |
1254 | .data = &sysctl_panic_on_rcu_stall, | |
1255 | .maxlen = sizeof(sysctl_panic_on_rcu_stall), | |
1256 | .mode = 0644, | |
1257 | .proc_handler = proc_dointvec_minmax, | |
1258 | .extra1 = &zero, | |
1259 | .extra2 = &one, | |
1260 | }, | |
357b57d7 TC |
1261 | #endif |
1262 | #ifdef CONFIG_X86 | |
1263 | { | |
1264 | .procname = "ibrs_enabled", | |
1265 | .data = &sysctl_ibrs_enabled, | |
1266 | .maxlen = sizeof(unsigned int), | |
1267 | .mode = 0644, | |
1268 | .proc_handler = proc_dointvec_ibrs_ctrl, | |
1269 | .extra1 = &zero, | |
1270 | .extra2 = &two, | |
1271 | }, | |
1272 | { | |
1273 | .procname = "ibpb_enabled", | |
1274 | .data = &sysctl_ibpb_enabled, | |
1275 | .maxlen = sizeof(unsigned int), | |
1276 | .mode = 0644, | |
1277 | .proc_handler = proc_dointvec_ibpb_ctrl, | |
1278 | .extra1 = &zero, | |
1279 | .extra2 = &one, | |
1280 | }, | |
1281 | { | |
1282 | .procname = "ibrs_dump", | |
1283 | .data = &sysctl_ibrs_dump, | |
1284 | .maxlen = sizeof(unsigned int), | |
1285 | .mode = 0644, | |
1286 | .proc_handler = proc_dointvec_ibrs_dump, | |
1287 | .extra1 = &zero, | |
1288 | .extra2 = &one, | |
1289 | }, | |
bc7a34b8 | 1290 | #endif |
6fce56ec | 1291 | { } |
1da177e4 LT |
1292 | }; |
1293 | ||
d8217f07 | 1294 | static struct ctl_table vm_table[] = { |
1da177e4 | 1295 | { |
1da177e4 LT |
1296 | .procname = "overcommit_memory", |
1297 | .data = &sysctl_overcommit_memory, | |
1298 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1299 | .mode = 0644, | |
cb16e95f PH |
1300 | .proc_handler = proc_dointvec_minmax, |
1301 | .extra1 = &zero, | |
1302 | .extra2 = &two, | |
1da177e4 | 1303 | }, |
fadd8fbd | 1304 | { |
fadd8fbd KH |
1305 | .procname = "panic_on_oom", |
1306 | .data = &sysctl_panic_on_oom, | |
1307 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1308 | .mode = 0644, | |
cb16e95f PH |
1309 | .proc_handler = proc_dointvec_minmax, |
1310 | .extra1 = &zero, | |
1311 | .extra2 = &two, | |
fadd8fbd | 1312 | }, |
fe071d7e | 1313 | { |
fe071d7e DR |
1314 | .procname = "oom_kill_allocating_task", |
1315 | .data = &sysctl_oom_kill_allocating_task, | |
1316 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1317 | .mode = 0644, | |
6d456111 | 1318 | .proc_handler = proc_dointvec, |
fe071d7e | 1319 | }, |
fef1bdd6 | 1320 | { |
fef1bdd6 DR |
1321 | .procname = "oom_dump_tasks", |
1322 | .data = &sysctl_oom_dump_tasks, | |
1323 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1324 | .mode = 0644, | |
6d456111 | 1325 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1326 | }, |
1da177e4 | 1327 | { |
1da177e4 LT |
1328 | .procname = "overcommit_ratio", |
1329 | .data = &sysctl_overcommit_ratio, | |
1330 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1331 | .mode = 0644, | |
49f0ce5f JM |
1332 | .proc_handler = overcommit_ratio_handler, |
1333 | }, | |
1334 | { | |
1335 | .procname = "overcommit_kbytes", | |
1336 | .data = &sysctl_overcommit_kbytes, | |
1337 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1338 | .mode = 0644, | |
1339 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1340 | }, |
1341 | { | |
1da177e4 LT |
1342 | .procname = "page-cluster", |
1343 | .data = &page_cluster, | |
1344 | .maxlen = sizeof(int), | |
1345 | .mode = 0644, | |
cb16e95f PH |
1346 | .proc_handler = proc_dointvec_minmax, |
1347 | .extra1 = &zero, | |
1da177e4 LT |
1348 | }, |
1349 | { | |
1da177e4 LT |
1350 | .procname = "dirty_background_ratio", |
1351 | .data = &dirty_background_ratio, | |
1352 | .maxlen = sizeof(dirty_background_ratio), | |
1353 | .mode = 0644, | |
6d456111 | 1354 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1355 | .extra1 = &zero, |
1356 | .extra2 = &one_hundred, | |
1357 | }, | |
2da02997 | 1358 | { |
2da02997 DR |
1359 | .procname = "dirty_background_bytes", |
1360 | .data = &dirty_background_bytes, | |
1361 | .maxlen = sizeof(dirty_background_bytes), | |
1362 | .mode = 0644, | |
6d456111 | 1363 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1364 | .extra1 = &one_ul, |
2da02997 | 1365 | }, |
1da177e4 | 1366 | { |
1da177e4 LT |
1367 | .procname = "dirty_ratio", |
1368 | .data = &vm_dirty_ratio, | |
1369 | .maxlen = sizeof(vm_dirty_ratio), | |
1370 | .mode = 0644, | |
6d456111 | 1371 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1372 | .extra1 = &zero, |
1373 | .extra2 = &one_hundred, | |
1374 | }, | |
2da02997 | 1375 | { |
2da02997 DR |
1376 | .procname = "dirty_bytes", |
1377 | .data = &vm_dirty_bytes, | |
1378 | .maxlen = sizeof(vm_dirty_bytes), | |
1379 | .mode = 0644, | |
6d456111 | 1380 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1381 | .extra1 = &dirty_bytes_min, |
2da02997 | 1382 | }, |
1da177e4 | 1383 | { |
1da177e4 | 1384 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1385 | .data = &dirty_writeback_interval, |
1386 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1387 | .mode = 0644, |
6d456111 | 1388 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1389 | }, |
1390 | { | |
1da177e4 | 1391 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1392 | .data = &dirty_expire_interval, |
1393 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1394 | .mode = 0644, |
cb16e95f PH |
1395 | .proc_handler = proc_dointvec_minmax, |
1396 | .extra1 = &zero, | |
1da177e4 | 1397 | }, |
1efff914 TT |
1398 | { |
1399 | .procname = "dirtytime_expire_seconds", | |
1400 | .data = &dirtytime_expire_interval, | |
1401 | .maxlen = sizeof(dirty_expire_interval), | |
1402 | .mode = 0644, | |
1403 | .proc_handler = dirtytime_interval_handler, | |
1404 | .extra1 = &zero, | |
1405 | }, | |
1da177e4 | 1406 | { |
3965c9ae WL |
1407 | .procname = "nr_pdflush_threads", |
1408 | .mode = 0444 /* read-only */, | |
1409 | .proc_handler = pdflush_proc_obsolete, | |
1da177e4 LT |
1410 | }, |
1411 | { | |
1da177e4 LT |
1412 | .procname = "swappiness", |
1413 | .data = &vm_swappiness, | |
1414 | .maxlen = sizeof(vm_swappiness), | |
1415 | .mode = 0644, | |
6d456111 | 1416 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1417 | .extra1 = &zero, |
1418 | .extra2 = &one_hundred, | |
1419 | }, | |
1420 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1421 | { |
1da177e4 | 1422 | .procname = "nr_hugepages", |
e5ff2159 | 1423 | .data = NULL, |
1da177e4 LT |
1424 | .maxlen = sizeof(unsigned long), |
1425 | .mode = 0644, | |
6d456111 | 1426 | .proc_handler = hugetlb_sysctl_handler, |
06808b08 LS |
1427 | }, |
1428 | #ifdef CONFIG_NUMA | |
1429 | { | |
1430 | .procname = "nr_hugepages_mempolicy", | |
1431 | .data = NULL, | |
1432 | .maxlen = sizeof(unsigned long), | |
1433 | .mode = 0644, | |
1434 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
06808b08 LS |
1435 | }, |
1436 | #endif | |
1da177e4 | 1437 | { |
1da177e4 LT |
1438 | .procname = "hugetlb_shm_group", |
1439 | .data = &sysctl_hugetlb_shm_group, | |
1440 | .maxlen = sizeof(gid_t), | |
1441 | .mode = 0644, | |
6d456111 | 1442 | .proc_handler = proc_dointvec, |
1da177e4 | 1443 | }, |
396faf03 | 1444 | { |
396faf03 MG |
1445 | .procname = "hugepages_treat_as_movable", |
1446 | .data = &hugepages_treat_as_movable, | |
1447 | .maxlen = sizeof(int), | |
1448 | .mode = 0644, | |
86cdb465 | 1449 | .proc_handler = proc_dointvec, |
396faf03 | 1450 | }, |
d1c3fb1f | 1451 | { |
d1c3fb1f | 1452 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1453 | .data = NULL, |
1454 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1455 | .mode = 0644, |
6d456111 | 1456 | .proc_handler = hugetlb_overcommit_handler, |
d1c3fb1f | 1457 | }, |
1da177e4 LT |
1458 | #endif |
1459 | { | |
1da177e4 LT |
1460 | .procname = "lowmem_reserve_ratio", |
1461 | .data = &sysctl_lowmem_reserve_ratio, | |
1462 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1463 | .mode = 0644, | |
6d456111 | 1464 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1465 | }, |
9d0243bc | 1466 | { |
9d0243bc AM |
1467 | .procname = "drop_caches", |
1468 | .data = &sysctl_drop_caches, | |
1469 | .maxlen = sizeof(int), | |
1470 | .mode = 0644, | |
1471 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1472 | .extra1 = &one, |
5509a5d2 | 1473 | .extra2 = &four, |
9d0243bc | 1474 | }, |
76ab0f53 MG |
1475 | #ifdef CONFIG_COMPACTION |
1476 | { | |
1477 | .procname = "compact_memory", | |
1478 | .data = &sysctl_compact_memory, | |
1479 | .maxlen = sizeof(int), | |
1480 | .mode = 0200, | |
1481 | .proc_handler = sysctl_compaction_handler, | |
1482 | }, | |
5e771905 MG |
1483 | { |
1484 | .procname = "extfrag_threshold", | |
1485 | .data = &sysctl_extfrag_threshold, | |
1486 | .maxlen = sizeof(int), | |
1487 | .mode = 0644, | |
1488 | .proc_handler = sysctl_extfrag_handler, | |
1489 | .extra1 = &min_extfrag_threshold, | |
1490 | .extra2 = &max_extfrag_threshold, | |
1491 | }, | |
5bbe3547 EM |
1492 | { |
1493 | .procname = "compact_unevictable_allowed", | |
1494 | .data = &sysctl_compact_unevictable_allowed, | |
1495 | .maxlen = sizeof(int), | |
1496 | .mode = 0644, | |
1497 | .proc_handler = proc_dointvec, | |
1498 | .extra1 = &zero, | |
1499 | .extra2 = &one, | |
1500 | }, | |
5e771905 | 1501 | |
76ab0f53 | 1502 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1503 | { |
1da177e4 LT |
1504 | .procname = "min_free_kbytes", |
1505 | .data = &min_free_kbytes, | |
1506 | .maxlen = sizeof(min_free_kbytes), | |
1507 | .mode = 0644, | |
6d456111 | 1508 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1509 | .extra1 = &zero, |
1510 | }, | |
795ae7a0 JW |
1511 | { |
1512 | .procname = "watermark_scale_factor", | |
1513 | .data = &watermark_scale_factor, | |
1514 | .maxlen = sizeof(watermark_scale_factor), | |
1515 | .mode = 0644, | |
1516 | .proc_handler = watermark_scale_factor_sysctl_handler, | |
1517 | .extra1 = &one, | |
1518 | .extra2 = &one_thousand, | |
1519 | }, | |
8ad4b1fb | 1520 | { |
8ad4b1fb RS |
1521 | .procname = "percpu_pagelist_fraction", |
1522 | .data = &percpu_pagelist_fraction, | |
1523 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1524 | .mode = 0644, | |
6d456111 | 1525 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1526 | .extra1 = &zero, |
8ad4b1fb | 1527 | }, |
1da177e4 LT |
1528 | #ifdef CONFIG_MMU |
1529 | { | |
1da177e4 LT |
1530 | .procname = "max_map_count", |
1531 | .data = &sysctl_max_map_count, | |
1532 | .maxlen = sizeof(sysctl_max_map_count), | |
1533 | .mode = 0644, | |
3e26120c | 1534 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1535 | .extra1 = &zero, |
1da177e4 | 1536 | }, |
dd8632a1 PM |
1537 | #else |
1538 | { | |
dd8632a1 PM |
1539 | .procname = "nr_trim_pages", |
1540 | .data = &sysctl_nr_trim_pages, | |
1541 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1542 | .mode = 0644, | |
6d456111 | 1543 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1544 | .extra1 = &zero, |
1545 | }, | |
1da177e4 LT |
1546 | #endif |
1547 | { | |
1da177e4 LT |
1548 | .procname = "laptop_mode", |
1549 | .data = &laptop_mode, | |
1550 | .maxlen = sizeof(laptop_mode), | |
1551 | .mode = 0644, | |
6d456111 | 1552 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1553 | }, |
1554 | { | |
1da177e4 LT |
1555 | .procname = "block_dump", |
1556 | .data = &block_dump, | |
1557 | .maxlen = sizeof(block_dump), | |
1558 | .mode = 0644, | |
6d456111 | 1559 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1560 | .extra1 = &zero, |
1561 | }, | |
1562 | { | |
1da177e4 LT |
1563 | .procname = "vfs_cache_pressure", |
1564 | .data = &sysctl_vfs_cache_pressure, | |
1565 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1566 | .mode = 0644, | |
6d456111 | 1567 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1568 | .extra1 = &zero, |
1569 | }, | |
1570 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1571 | { | |
1da177e4 LT |
1572 | .procname = "legacy_va_layout", |
1573 | .data = &sysctl_legacy_va_layout, | |
1574 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1575 | .mode = 0644, | |
6d456111 | 1576 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1577 | .extra1 = &zero, |
1578 | }, | |
1579 | #endif | |
1743660b CL |
1580 | #ifdef CONFIG_NUMA |
1581 | { | |
1743660b | 1582 | .procname = "zone_reclaim_mode", |
a5f5f91d MG |
1583 | .data = &node_reclaim_mode, |
1584 | .maxlen = sizeof(node_reclaim_mode), | |
1743660b | 1585 | .mode = 0644, |
6d456111 | 1586 | .proc_handler = proc_dointvec, |
c84db23c | 1587 | .extra1 = &zero, |
1743660b | 1588 | }, |
9614634f | 1589 | { |
9614634f CL |
1590 | .procname = "min_unmapped_ratio", |
1591 | .data = &sysctl_min_unmapped_ratio, | |
1592 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1593 | .mode = 0644, | |
6d456111 | 1594 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1595 | .extra1 = &zero, |
1596 | .extra2 = &one_hundred, | |
1597 | }, | |
0ff38490 | 1598 | { |
0ff38490 CL |
1599 | .procname = "min_slab_ratio", |
1600 | .data = &sysctl_min_slab_ratio, | |
1601 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1602 | .mode = 0644, | |
6d456111 | 1603 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1604 | .extra1 = &zero, |
1605 | .extra2 = &one_hundred, | |
1606 | }, | |
e6e5494c | 1607 | #endif |
77461ab3 CL |
1608 | #ifdef CONFIG_SMP |
1609 | { | |
77461ab3 CL |
1610 | .procname = "stat_interval", |
1611 | .data = &sysctl_stat_interval, | |
1612 | .maxlen = sizeof(sysctl_stat_interval), | |
1613 | .mode = 0644, | |
6d456111 | 1614 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 | 1615 | }, |
52b6f46b HD |
1616 | { |
1617 | .procname = "stat_refresh", | |
1618 | .data = NULL, | |
1619 | .maxlen = 0, | |
1620 | .mode = 0600, | |
1621 | .proc_handler = vmstat_refresh, | |
1622 | }, | |
77461ab3 | 1623 | #endif |
6e141546 | 1624 | #ifdef CONFIG_MMU |
ed032189 | 1625 | { |
ed032189 | 1626 | .procname = "mmap_min_addr", |
788084ab EP |
1627 | .data = &dac_mmap_min_addr, |
1628 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1629 | .mode = 0644, |
6d456111 | 1630 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1631 | }, |
6e141546 | 1632 | #endif |
f0c0b2b8 KH |
1633 | #ifdef CONFIG_NUMA |
1634 | { | |
f0c0b2b8 KH |
1635 | .procname = "numa_zonelist_order", |
1636 | .data = &numa_zonelist_order, | |
1637 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1638 | .mode = 0644, | |
6d456111 | 1639 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1640 | }, |
1641 | #endif | |
2b8232ce | 1642 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1643 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1644 | { |
e6e5494c | 1645 | .procname = "vdso_enabled", |
3d7ee969 AL |
1646 | #ifdef CONFIG_X86_32 |
1647 | .data = &vdso32_enabled, | |
1648 | .maxlen = sizeof(vdso32_enabled), | |
1649 | #else | |
e6e5494c IM |
1650 | .data = &vdso_enabled, |
1651 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1652 | #endif |
e6e5494c | 1653 | .mode = 0644, |
6d456111 | 1654 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1655 | .extra1 = &zero, |
1656 | }, | |
1da177e4 | 1657 | #endif |
195cf453 BG |
1658 | #ifdef CONFIG_HIGHMEM |
1659 | { | |
195cf453 BG |
1660 | .procname = "highmem_is_dirtyable", |
1661 | .data = &vm_highmem_is_dirtyable, | |
1662 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1663 | .mode = 0644, | |
6d456111 | 1664 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1665 | .extra1 = &zero, |
1666 | .extra2 = &one, | |
1667 | }, | |
1668 | #endif | |
6a46079c AK |
1669 | #ifdef CONFIG_MEMORY_FAILURE |
1670 | { | |
6a46079c AK |
1671 | .procname = "memory_failure_early_kill", |
1672 | .data = &sysctl_memory_failure_early_kill, | |
1673 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1674 | .mode = 0644, | |
6d456111 | 1675 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1676 | .extra1 = &zero, |
1677 | .extra2 = &one, | |
1678 | }, | |
1679 | { | |
6a46079c AK |
1680 | .procname = "memory_failure_recovery", |
1681 | .data = &sysctl_memory_failure_recovery, | |
1682 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1683 | .mode = 0644, | |
6d456111 | 1684 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1685 | .extra1 = &zero, |
1686 | .extra2 = &one, | |
1687 | }, | |
1688 | #endif | |
c9b1d098 AS |
1689 | { |
1690 | .procname = "user_reserve_kbytes", | |
1691 | .data = &sysctl_user_reserve_kbytes, | |
1692 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1693 | .mode = 0644, | |
1694 | .proc_handler = proc_doulongvec_minmax, | |
1695 | }, | |
4eeab4f5 AS |
1696 | { |
1697 | .procname = "admin_reserve_kbytes", | |
1698 | .data = &sysctl_admin_reserve_kbytes, | |
1699 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1700 | .mode = 0644, | |
1701 | .proc_handler = proc_doulongvec_minmax, | |
1702 | }, | |
d07e2259 DC |
1703 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS |
1704 | { | |
1705 | .procname = "mmap_rnd_bits", | |
1706 | .data = &mmap_rnd_bits, | |
1707 | .maxlen = sizeof(mmap_rnd_bits), | |
1708 | .mode = 0600, | |
1709 | .proc_handler = proc_dointvec_minmax, | |
1710 | .extra1 = (void *)&mmap_rnd_bits_min, | |
1711 | .extra2 = (void *)&mmap_rnd_bits_max, | |
1712 | }, | |
1713 | #endif | |
1714 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS | |
1715 | { | |
1716 | .procname = "mmap_rnd_compat_bits", | |
1717 | .data = &mmap_rnd_compat_bits, | |
1718 | .maxlen = sizeof(mmap_rnd_compat_bits), | |
1719 | .mode = 0600, | |
1720 | .proc_handler = proc_dointvec_minmax, | |
1721 | .extra1 = (void *)&mmap_rnd_compat_bits_min, | |
1722 | .extra2 = (void *)&mmap_rnd_compat_bits_max, | |
1723 | }, | |
1724 | #endif | |
6fce56ec | 1725 | { } |
1da177e4 LT |
1726 | }; |
1727 | ||
d8217f07 | 1728 | static struct ctl_table fs_table[] = { |
1da177e4 | 1729 | { |
1da177e4 LT |
1730 | .procname = "inode-nr", |
1731 | .data = &inodes_stat, | |
3942c07c | 1732 | .maxlen = 2*sizeof(long), |
1da177e4 | 1733 | .mode = 0444, |
cffbc8aa | 1734 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1735 | }, |
1736 | { | |
1da177e4 LT |
1737 | .procname = "inode-state", |
1738 | .data = &inodes_stat, | |
3942c07c | 1739 | .maxlen = 7*sizeof(long), |
1da177e4 | 1740 | .mode = 0444, |
cffbc8aa | 1741 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1742 | }, |
1743 | { | |
1da177e4 LT |
1744 | .procname = "file-nr", |
1745 | .data = &files_stat, | |
518de9b3 | 1746 | .maxlen = sizeof(files_stat), |
1da177e4 | 1747 | .mode = 0444, |
6d456111 | 1748 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1749 | }, |
1750 | { | |
1da177e4 LT |
1751 | .procname = "file-max", |
1752 | .data = &files_stat.max_files, | |
518de9b3 | 1753 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1754 | .mode = 0644, |
518de9b3 | 1755 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1756 | }, |
9cfe015a | 1757 | { |
9cfe015a ED |
1758 | .procname = "nr_open", |
1759 | .data = &sysctl_nr_open, | |
9b80a184 | 1760 | .maxlen = sizeof(unsigned int), |
9cfe015a | 1761 | .mode = 0644, |
6d456111 | 1762 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1763 | .extra1 = &sysctl_nr_open_min, |
1764 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1765 | }, |
1da177e4 | 1766 | { |
1da177e4 LT |
1767 | .procname = "dentry-state", |
1768 | .data = &dentry_stat, | |
3942c07c | 1769 | .maxlen = 6*sizeof(long), |
1da177e4 | 1770 | .mode = 0444, |
312d3ca8 | 1771 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1772 | }, |
1773 | { | |
1da177e4 LT |
1774 | .procname = "overflowuid", |
1775 | .data = &fs_overflowuid, | |
1776 | .maxlen = sizeof(int), | |
1777 | .mode = 0644, | |
6d456111 | 1778 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1779 | .extra1 = &minolduid, |
1780 | .extra2 = &maxolduid, | |
1781 | }, | |
1782 | { | |
1da177e4 LT |
1783 | .procname = "overflowgid", |
1784 | .data = &fs_overflowgid, | |
1785 | .maxlen = sizeof(int), | |
1786 | .mode = 0644, | |
6d456111 | 1787 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1788 | .extra1 = &minolduid, |
1789 | .extra2 = &maxolduid, | |
1790 | }, | |
bfcd17a6 | 1791 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1792 | { |
1da177e4 LT |
1793 | .procname = "leases-enable", |
1794 | .data = &leases_enable, | |
1795 | .maxlen = sizeof(int), | |
1796 | .mode = 0644, | |
6d456111 | 1797 | .proc_handler = proc_dointvec, |
1da177e4 | 1798 | }, |
bfcd17a6 | 1799 | #endif |
1da177e4 LT |
1800 | #ifdef CONFIG_DNOTIFY |
1801 | { | |
1da177e4 LT |
1802 | .procname = "dir-notify-enable", |
1803 | .data = &dir_notify_enable, | |
1804 | .maxlen = sizeof(int), | |
1805 | .mode = 0644, | |
6d456111 | 1806 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1807 | }, |
1808 | #endif | |
1809 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1810 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1811 | { |
1da177e4 LT |
1812 | .procname = "lease-break-time", |
1813 | .data = &lease_break_time, | |
1814 | .maxlen = sizeof(int), | |
1815 | .mode = 0644, | |
6d456111 | 1816 | .proc_handler = proc_dointvec, |
1da177e4 | 1817 | }, |
bfcd17a6 | 1818 | #endif |
ebf3f09c | 1819 | #ifdef CONFIG_AIO |
1da177e4 | 1820 | { |
1da177e4 LT |
1821 | .procname = "aio-nr", |
1822 | .data = &aio_nr, | |
1823 | .maxlen = sizeof(aio_nr), | |
1824 | .mode = 0444, | |
6d456111 | 1825 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1826 | }, |
1827 | { | |
1da177e4 LT |
1828 | .procname = "aio-max-nr", |
1829 | .data = &aio_max_nr, | |
1830 | .maxlen = sizeof(aio_max_nr), | |
1831 | .mode = 0644, | |
6d456111 | 1832 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1833 | }, |
ebf3f09c | 1834 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1835 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1836 | { |
0399cb08 RL |
1837 | .procname = "inotify", |
1838 | .mode = 0555, | |
1839 | .child = inotify_table, | |
1840 | }, | |
1841 | #endif | |
7ef9964e DL |
1842 | #ifdef CONFIG_EPOLL |
1843 | { | |
1844 | .procname = "epoll", | |
1845 | .mode = 0555, | |
1846 | .child = epoll_table, | |
1847 | }, | |
1848 | #endif | |
1da177e4 | 1849 | #endif |
800179c9 KC |
1850 | { |
1851 | .procname = "protected_symlinks", | |
1852 | .data = &sysctl_protected_symlinks, | |
1853 | .maxlen = sizeof(int), | |
1854 | .mode = 0600, | |
1855 | .proc_handler = proc_dointvec_minmax, | |
1856 | .extra1 = &zero, | |
1857 | .extra2 = &one, | |
1858 | }, | |
1859 | { | |
1860 | .procname = "protected_hardlinks", | |
1861 | .data = &sysctl_protected_hardlinks, | |
1862 | .maxlen = sizeof(int), | |
1863 | .mode = 0600, | |
1864 | .proc_handler = proc_dointvec_minmax, | |
1865 | .extra1 = &zero, | |
1866 | .extra2 = &one, | |
1867 | }, | |
d6e71144 | 1868 | { |
d6e71144 AC |
1869 | .procname = "suid_dumpable", |
1870 | .data = &suid_dumpable, | |
1871 | .maxlen = sizeof(int), | |
1872 | .mode = 0644, | |
54b50199 | 1873 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1874 | .extra1 = &zero, |
1875 | .extra2 = &two, | |
d6e71144 | 1876 | }, |
2abc26fc EB |
1877 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1878 | { | |
2abc26fc EB |
1879 | .procname = "binfmt_misc", |
1880 | .mode = 0555, | |
f9bd6733 | 1881 | .child = sysctl_mount_point, |
2abc26fc EB |
1882 | }, |
1883 | #endif | |
b492e95b | 1884 | { |
ff9da691 JA |
1885 | .procname = "pipe-max-size", |
1886 | .data = &pipe_max_size, | |
b492e95b JA |
1887 | .maxlen = sizeof(int), |
1888 | .mode = 0644, | |
ff9da691 JA |
1889 | .proc_handler = &pipe_proc_fn, |
1890 | .extra1 = &pipe_min_size, | |
b492e95b | 1891 | }, |
759c0114 WT |
1892 | { |
1893 | .procname = "pipe-user-pages-hard", | |
1894 | .data = &pipe_user_pages_hard, | |
1895 | .maxlen = sizeof(pipe_user_pages_hard), | |
1896 | .mode = 0644, | |
1897 | .proc_handler = proc_doulongvec_minmax, | |
1898 | }, | |
1899 | { | |
1900 | .procname = "pipe-user-pages-soft", | |
1901 | .data = &pipe_user_pages_soft, | |
1902 | .maxlen = sizeof(pipe_user_pages_soft), | |
1903 | .mode = 0644, | |
1904 | .proc_handler = proc_doulongvec_minmax, | |
1905 | }, | |
d2921684 EB |
1906 | { |
1907 | .procname = "mount-max", | |
1908 | .data = &sysctl_mount_max, | |
1909 | .maxlen = sizeof(unsigned int), | |
1910 | .mode = 0644, | |
1911 | .proc_handler = proc_dointvec_minmax, | |
1912 | .extra1 = &one, | |
1913 | }, | |
6fce56ec | 1914 | { } |
1da177e4 LT |
1915 | }; |
1916 | ||
d8217f07 | 1917 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1918 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1919 | { |
abd4f750 MAS |
1920 | .procname = "exception-trace", |
1921 | .data = &show_unhandled_signals, | |
1922 | .maxlen = sizeof(int), | |
1923 | .mode = 0644, | |
1924 | .proc_handler = proc_dointvec | |
1925 | }, | |
b2be84df MH |
1926 | #endif |
1927 | #if defined(CONFIG_OPTPROBES) | |
1928 | { | |
1929 | .procname = "kprobes-optimization", | |
1930 | .data = &sysctl_kprobes_optimization, | |
1931 | .maxlen = sizeof(int), | |
1932 | .mode = 0644, | |
1933 | .proc_handler = proc_kprobes_optimization_handler, | |
1934 | .extra1 = &zero, | |
1935 | .extra2 = &one, | |
1936 | }, | |
abd4f750 | 1937 | #endif |
6fce56ec | 1938 | { } |
1da177e4 LT |
1939 | }; |
1940 | ||
d8217f07 | 1941 | static struct ctl_table dev_table[] = { |
6fce56ec | 1942 | { } |
0eeca283 | 1943 | }; |
1da177e4 | 1944 | |
de4e83bd | 1945 | int __init sysctl_init(void) |
d912b0cc | 1946 | { |
fd4b616b SR |
1947 | struct ctl_table_header *hdr; |
1948 | ||
1949 | hdr = register_sysctl_table(sysctl_base_table); | |
1950 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1951 | return 0; |
1952 | } | |
1953 | ||
b89a8171 EB |
1954 | #endif /* CONFIG_SYSCTL */ |
1955 | ||
1da177e4 LT |
1956 | /* |
1957 | * /proc/sys support | |
1958 | */ | |
1959 | ||
b89a8171 | 1960 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1961 | |
f8808300 KC |
1962 | static int _proc_do_string(char *data, int maxlen, int write, |
1963 | char __user *buffer, | |
b1ba4ddd | 1964 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1965 | { |
1966 | size_t len; | |
1967 | char __user *p; | |
1968 | char c; | |
8d060877 ON |
1969 | |
1970 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1971 | *lenp = 0; |
1972 | return 0; | |
1973 | } | |
8d060877 | 1974 | |
1da177e4 | 1975 | if (write) { |
f4aacea2 KC |
1976 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1977 | /* Only continue writes not past the end of buffer. */ | |
1978 | len = strlen(data); | |
1979 | if (len > maxlen - 1) | |
1980 | len = maxlen - 1; | |
1981 | ||
1982 | if (*ppos > len) | |
1983 | return 0; | |
1984 | len = *ppos; | |
1985 | } else { | |
1986 | /* Start writing from beginning of buffer. */ | |
1987 | len = 0; | |
1988 | } | |
1989 | ||
2ca9bb45 | 1990 | *ppos += *lenp; |
1da177e4 | 1991 | p = buffer; |
2ca9bb45 | 1992 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
1993 | if (get_user(c, p++)) |
1994 | return -EFAULT; | |
1995 | if (c == 0 || c == '\n') | |
1996 | break; | |
2ca9bb45 | 1997 | data[len++] = c; |
1da177e4 | 1998 | } |
f8808300 | 1999 | data[len] = 0; |
1da177e4 | 2000 | } else { |
f5dd3d6f SV |
2001 | len = strlen(data); |
2002 | if (len > maxlen) | |
2003 | len = maxlen; | |
8d060877 ON |
2004 | |
2005 | if (*ppos > len) { | |
2006 | *lenp = 0; | |
2007 | return 0; | |
2008 | } | |
2009 | ||
2010 | data += *ppos; | |
2011 | len -= *ppos; | |
2012 | ||
1da177e4 LT |
2013 | if (len > *lenp) |
2014 | len = *lenp; | |
2015 | if (len) | |
f8808300 | 2016 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
2017 | return -EFAULT; |
2018 | if (len < *lenp) { | |
f8808300 | 2019 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
2020 | return -EFAULT; |
2021 | len++; | |
2022 | } | |
2023 | *lenp = len; | |
2024 | *ppos += len; | |
2025 | } | |
2026 | return 0; | |
2027 | } | |
2028 | ||
f4aacea2 KC |
2029 | static void warn_sysctl_write(struct ctl_table *table) |
2030 | { | |
2031 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
2032 | "This will not be supported in the future. To silence this\n" | |
2033 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
2034 | current->comm, table->procname); | |
2035 | } | |
2036 | ||
d383d484 LR |
2037 | /** |
2038 | * proc_first_pos_non_zero_ignore - check if firs position is allowed | |
2039 | * @ppos: file position | |
2040 | * @table: the sysctl table | |
2041 | * | |
2042 | * Returns true if the first position is non-zero and the sysctl_writes_strict | |
2043 | * mode indicates this is not allowed for numeric input types. String proc | |
2044 | * hadlers can ignore the return value. | |
2045 | */ | |
2046 | static bool proc_first_pos_non_zero_ignore(loff_t *ppos, | |
2047 | struct ctl_table *table) | |
2048 | { | |
2049 | if (!*ppos) | |
2050 | return false; | |
2051 | ||
2052 | switch (sysctl_writes_strict) { | |
2053 | case SYSCTL_WRITES_STRICT: | |
2054 | return true; | |
2055 | case SYSCTL_WRITES_WARN: | |
2056 | warn_sysctl_write(table); | |
2057 | return false; | |
2058 | default: | |
2059 | return false; | |
2060 | } | |
2061 | } | |
2062 | ||
f5dd3d6f SV |
2063 | /** |
2064 | * proc_dostring - read a string sysctl | |
2065 | * @table: the sysctl table | |
2066 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
2067 | * @buffer: the user buffer |
2068 | * @lenp: the size of the user buffer | |
2069 | * @ppos: file position | |
2070 | * | |
2071 | * Reads/writes a string from/to the user buffer. If the kernel | |
2072 | * buffer provided is not large enough to hold the string, the | |
2073 | * string is truncated. The copied string is %NULL-terminated. | |
2074 | * If the string is being read by the user process, it is copied | |
2075 | * and a newline '\n' is added. It is truncated if the buffer is | |
2076 | * not large enough. | |
2077 | * | |
2078 | * Returns 0 on success. | |
2079 | */ | |
8d65af78 | 2080 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2081 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2082 | { | |
d383d484 LR |
2083 | if (write) |
2084 | proc_first_pos_non_zero_ignore(ppos, table); | |
f4aacea2 | 2085 | |
f8808300 KC |
2086 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
2087 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
2088 | } |
2089 | ||
00b7c339 AW |
2090 | static size_t proc_skip_spaces(char **buf) |
2091 | { | |
2092 | size_t ret; | |
2093 | char *tmp = skip_spaces(*buf); | |
2094 | ret = tmp - *buf; | |
2095 | *buf = tmp; | |
2096 | return ret; | |
2097 | } | |
2098 | ||
9f977fb7 OP |
2099 | static void proc_skip_char(char **buf, size_t *size, const char v) |
2100 | { | |
2101 | while (*size) { | |
2102 | if (**buf != v) | |
2103 | break; | |
2104 | (*size)--; | |
2105 | (*buf)++; | |
2106 | } | |
2107 | } | |
2108 | ||
00b7c339 AW |
2109 | #define TMPBUFLEN 22 |
2110 | /** | |
0fc377bd | 2111 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 2112 | * |
0fc377bd RD |
2113 | * @buf: a kernel buffer |
2114 | * @size: size of the kernel buffer | |
2115 | * @val: this is where the number will be stored | |
2116 | * @neg: set to %TRUE if number is negative | |
2117 | * @perm_tr: a vector which contains the allowed trailers | |
2118 | * @perm_tr_len: size of the perm_tr vector | |
2119 | * @tr: pointer to store the trailer character | |
00b7c339 | 2120 | * |
0fc377bd RD |
2121 | * In case of success %0 is returned and @buf and @size are updated with |
2122 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
2123 | * character exists (size is non-zero after returning from this | |
2124 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
2125 | */ |
2126 | static int proc_get_long(char **buf, size_t *size, | |
2127 | unsigned long *val, bool *neg, | |
2128 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
2129 | { | |
2130 | int len; | |
2131 | char *p, tmp[TMPBUFLEN]; | |
2132 | ||
2133 | if (!*size) | |
2134 | return -EINVAL; | |
2135 | ||
2136 | len = *size; | |
2137 | if (len > TMPBUFLEN - 1) | |
2138 | len = TMPBUFLEN - 1; | |
2139 | ||
2140 | memcpy(tmp, *buf, len); | |
2141 | ||
2142 | tmp[len] = 0; | |
2143 | p = tmp; | |
2144 | if (*p == '-' && *size > 1) { | |
2145 | *neg = true; | |
2146 | p++; | |
2147 | } else | |
2148 | *neg = false; | |
2149 | if (!isdigit(*p)) | |
2150 | return -EINVAL; | |
2151 | ||
2152 | *val = simple_strtoul(p, &p, 0); | |
2153 | ||
2154 | len = p - tmp; | |
2155 | ||
2156 | /* We don't know if the next char is whitespace thus we may accept | |
2157 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
2158 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
2159 | if (len == TMPBUFLEN - 1) | |
2160 | return -EINVAL; | |
2161 | ||
2162 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
2163 | return -EINVAL; | |
1da177e4 | 2164 | |
00b7c339 AW |
2165 | if (tr && (len < *size)) |
2166 | *tr = *p; | |
2167 | ||
2168 | *buf += len; | |
2169 | *size -= len; | |
2170 | ||
2171 | return 0; | |
2172 | } | |
2173 | ||
2174 | /** | |
0fc377bd | 2175 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 2176 | * |
0fc377bd RD |
2177 | * @buf: the user buffer |
2178 | * @size: the size of the user buffer | |
2179 | * @val: the integer to be converted | |
2180 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 2181 | * |
0fc377bd RD |
2182 | * In case of success %0 is returned and @buf and @size are updated with |
2183 | * the amount of bytes written. | |
00b7c339 AW |
2184 | */ |
2185 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
2186 | bool neg) | |
2187 | { | |
2188 | int len; | |
2189 | char tmp[TMPBUFLEN], *p = tmp; | |
2190 | ||
2191 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
2192 | len = strlen(tmp); | |
2193 | if (len > *size) | |
2194 | len = *size; | |
2195 | if (copy_to_user(*buf, tmp, len)) | |
2196 | return -EFAULT; | |
2197 | *size -= len; | |
2198 | *buf += len; | |
2199 | return 0; | |
2200 | } | |
2201 | #undef TMPBUFLEN | |
2202 | ||
2203 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
2204 | { | |
2205 | if (*size) { | |
2206 | char __user **buffer = (char __user **)buf; | |
2207 | if (put_user(c, *buffer)) | |
2208 | return -EFAULT; | |
2209 | (*size)--, (*buffer)++; | |
2210 | *buf = *buffer; | |
2211 | } | |
2212 | return 0; | |
2213 | } | |
1da177e4 | 2214 | |
00b7c339 | 2215 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2216 | int *valp, |
2217 | int write, void *data) | |
2218 | { | |
2219 | if (write) { | |
230633d1 HS |
2220 | if (*negp) { |
2221 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
2222 | return -EINVAL; | |
2223 | *valp = -*lvalp; | |
2224 | } else { | |
2225 | if (*lvalp > (unsigned long) INT_MAX) | |
2226 | return -EINVAL; | |
2227 | *valp = *lvalp; | |
2228 | } | |
1da177e4 LT |
2229 | } else { |
2230 | int val = *valp; | |
2231 | if (val < 0) { | |
00b7c339 | 2232 | *negp = true; |
9a5bc726 | 2233 | *lvalp = -(unsigned long)val; |
1da177e4 | 2234 | } else { |
00b7c339 | 2235 | *negp = false; |
1da177e4 LT |
2236 | *lvalp = (unsigned long)val; |
2237 | } | |
2238 | } | |
2239 | return 0; | |
2240 | } | |
2241 | ||
4f2fec00 LR |
2242 | static int do_proc_douintvec_conv(unsigned long *lvalp, |
2243 | unsigned int *valp, | |
2244 | int write, void *data) | |
e7d316a0 SAK |
2245 | { |
2246 | if (write) { | |
4f2fec00 | 2247 | if (*lvalp > UINT_MAX) |
e7d316a0 | 2248 | return -EINVAL; |
425fffd8 LZ |
2249 | if (*lvalp > UINT_MAX) |
2250 | return -EINVAL; | |
e7d316a0 SAK |
2251 | *valp = *lvalp; |
2252 | } else { | |
2253 | unsigned int val = *valp; | |
2254 | *lvalp = (unsigned long)val; | |
2255 | } | |
2256 | return 0; | |
2257 | } | |
2258 | ||
00b7c339 AW |
2259 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
2260 | ||
d8217f07 | 2261 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2262 | int write, void __user *buffer, |
fcfbd547 | 2263 | size_t *lenp, loff_t *ppos, |
00b7c339 | 2264 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
2265 | int write, void *data), |
2266 | void *data) | |
2267 | { | |
00b7c339 | 2268 | int *i, vleft, first = 1, err = 0; |
00b7c339 | 2269 | size_t left; |
70f6cbb6 | 2270 | char *kbuf = NULL, *p; |
1da177e4 | 2271 | |
00b7c339 | 2272 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2273 | *lenp = 0; |
2274 | return 0; | |
2275 | } | |
2276 | ||
fcfbd547 | 2277 | i = (int *) tbl_data; |
1da177e4 LT |
2278 | vleft = table->maxlen / sizeof(*i); |
2279 | left = *lenp; | |
2280 | ||
2281 | if (!conv) | |
2282 | conv = do_proc_dointvec_conv; | |
2283 | ||
00b7c339 | 2284 | if (write) { |
d383d484 LR |
2285 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2286 | goto out; | |
f4aacea2 | 2287 | |
00b7c339 AW |
2288 | if (left > PAGE_SIZE - 1) |
2289 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2290 | p = kbuf = memdup_user_nul(buffer, left); |
2291 | if (IS_ERR(kbuf)) | |
2292 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2293 | } |
2294 | ||
1da177e4 | 2295 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2296 | unsigned long lval; |
2297 | bool neg; | |
1da177e4 | 2298 | |
00b7c339 | 2299 | if (write) { |
70f6cbb6 | 2300 | left -= proc_skip_spaces(&p); |
1da177e4 | 2301 | |
563b0467 O |
2302 | if (!left) |
2303 | break; | |
70f6cbb6 | 2304 | err = proc_get_long(&p, &left, &lval, &neg, |
00b7c339 AW |
2305 | proc_wspace_sep, |
2306 | sizeof(proc_wspace_sep), NULL); | |
2307 | if (err) | |
1da177e4 | 2308 | break; |
00b7c339 AW |
2309 | if (conv(&neg, &lval, i, 1, data)) { |
2310 | err = -EINVAL; | |
1da177e4 | 2311 | break; |
00b7c339 | 2312 | } |
1da177e4 | 2313 | } else { |
00b7c339 AW |
2314 | if (conv(&neg, &lval, i, 0, data)) { |
2315 | err = -EINVAL; | |
2316 | break; | |
2317 | } | |
1da177e4 | 2318 | if (!first) |
00b7c339 AW |
2319 | err = proc_put_char(&buffer, &left, '\t'); |
2320 | if (err) | |
2321 | break; | |
2322 | err = proc_put_long(&buffer, &left, lval, neg); | |
2323 | if (err) | |
1da177e4 | 2324 | break; |
1da177e4 LT |
2325 | } |
2326 | } | |
2327 | ||
00b7c339 AW |
2328 | if (!write && !first && left && !err) |
2329 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2330 | if (write && !err && left) |
70f6cbb6 | 2331 | left -= proc_skip_spaces(&p); |
1da177e4 | 2332 | if (write) { |
70f6cbb6 | 2333 | kfree(kbuf); |
00b7c339 AW |
2334 | if (first) |
2335 | return err ? : -EINVAL; | |
1da177e4 | 2336 | } |
1da177e4 | 2337 | *lenp -= left; |
f4aacea2 | 2338 | out: |
1da177e4 | 2339 | *ppos += *lenp; |
00b7c339 | 2340 | return err; |
1da177e4 LT |
2341 | } |
2342 | ||
8d65af78 | 2343 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2344 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2345 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2346 | int write, void *data), |
2347 | void *data) | |
2348 | { | |
8d65af78 | 2349 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2350 | buffer, lenp, ppos, conv, data); |
2351 | } | |
2352 | ||
4f2fec00 LR |
2353 | static int do_proc_douintvec_w(unsigned int *tbl_data, |
2354 | struct ctl_table *table, | |
2355 | void __user *buffer, | |
2356 | size_t *lenp, loff_t *ppos, | |
2357 | int (*conv)(unsigned long *lvalp, | |
2358 | unsigned int *valp, | |
2359 | int write, void *data), | |
2360 | void *data) | |
2361 | { | |
2362 | unsigned long lval; | |
2363 | int err = 0; | |
2364 | size_t left; | |
2365 | bool neg; | |
2366 | char *kbuf = NULL, *p; | |
2367 | ||
2368 | left = *lenp; | |
2369 | ||
2370 | if (proc_first_pos_non_zero_ignore(ppos, table)) | |
2371 | goto bail_early; | |
2372 | ||
2373 | if (left > PAGE_SIZE - 1) | |
2374 | left = PAGE_SIZE - 1; | |
2375 | ||
2376 | p = kbuf = memdup_user_nul(buffer, left); | |
2377 | if (IS_ERR(kbuf)) | |
2378 | return -EINVAL; | |
2379 | ||
2380 | left -= proc_skip_spaces(&p); | |
2381 | if (!left) { | |
2382 | err = -EINVAL; | |
2383 | goto out_free; | |
2384 | } | |
2385 | ||
2386 | err = proc_get_long(&p, &left, &lval, &neg, | |
2387 | proc_wspace_sep, | |
2388 | sizeof(proc_wspace_sep), NULL); | |
2389 | if (err || neg) { | |
2390 | err = -EINVAL; | |
2391 | goto out_free; | |
2392 | } | |
2393 | ||
2394 | if (conv(&lval, tbl_data, 1, data)) { | |
2395 | err = -EINVAL; | |
2396 | goto out_free; | |
2397 | } | |
2398 | ||
2399 | if (!err && left) | |
2400 | left -= proc_skip_spaces(&p); | |
2401 | ||
2402 | out_free: | |
2403 | kfree(kbuf); | |
2404 | if (err) | |
2405 | return -EINVAL; | |
2406 | ||
2407 | return 0; | |
2408 | ||
2409 | /* This is in keeping with old __do_proc_dointvec() */ | |
2410 | bail_early: | |
2411 | *ppos += *lenp; | |
2412 | return err; | |
2413 | } | |
2414 | ||
2415 | static int do_proc_douintvec_r(unsigned int *tbl_data, void __user *buffer, | |
2416 | size_t *lenp, loff_t *ppos, | |
2417 | int (*conv)(unsigned long *lvalp, | |
2418 | unsigned int *valp, | |
2419 | int write, void *data), | |
2420 | void *data) | |
2421 | { | |
2422 | unsigned long lval; | |
2423 | int err = 0; | |
2424 | size_t left; | |
2425 | ||
2426 | left = *lenp; | |
2427 | ||
2428 | if (conv(&lval, tbl_data, 0, data)) { | |
2429 | err = -EINVAL; | |
2430 | goto out; | |
2431 | } | |
2432 | ||
2433 | err = proc_put_long(&buffer, &left, lval, false); | |
2434 | if (err || !left) | |
2435 | goto out; | |
2436 | ||
2437 | err = proc_put_char(&buffer, &left, '\n'); | |
2438 | ||
2439 | out: | |
2440 | *lenp -= left; | |
2441 | *ppos += *lenp; | |
2442 | ||
2443 | return err; | |
2444 | } | |
2445 | ||
2446 | static int __do_proc_douintvec(void *tbl_data, struct ctl_table *table, | |
2447 | int write, void __user *buffer, | |
2448 | size_t *lenp, loff_t *ppos, | |
2449 | int (*conv)(unsigned long *lvalp, | |
2450 | unsigned int *valp, | |
2451 | int write, void *data), | |
2452 | void *data) | |
2453 | { | |
2454 | unsigned int *i, vleft; | |
2455 | ||
2456 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
2457 | *lenp = 0; | |
2458 | return 0; | |
2459 | } | |
2460 | ||
2461 | i = (unsigned int *) tbl_data; | |
2462 | vleft = table->maxlen / sizeof(*i); | |
2463 | ||
2464 | /* | |
2465 | * Arrays are not supported, keep this simple. *Do not* add | |
2466 | * support for them. | |
2467 | */ | |
2468 | if (vleft != 1) { | |
2469 | *lenp = 0; | |
2470 | return -EINVAL; | |
2471 | } | |
2472 | ||
2473 | if (!conv) | |
2474 | conv = do_proc_douintvec_conv; | |
2475 | ||
2476 | if (write) | |
2477 | return do_proc_douintvec_w(i, table, buffer, lenp, ppos, | |
2478 | conv, data); | |
2479 | return do_proc_douintvec_r(i, buffer, lenp, ppos, conv, data); | |
2480 | } | |
2481 | ||
2482 | static int do_proc_douintvec(struct ctl_table *table, int write, | |
2483 | void __user *buffer, size_t *lenp, loff_t *ppos, | |
2484 | int (*conv)(unsigned long *lvalp, | |
2485 | unsigned int *valp, | |
2486 | int write, void *data), | |
2487 | void *data) | |
2488 | { | |
2489 | return __do_proc_douintvec(table->data, table, write, | |
2490 | buffer, lenp, ppos, conv, data); | |
2491 | } | |
2492 | ||
1da177e4 LT |
2493 | /** |
2494 | * proc_dointvec - read a vector of integers | |
2495 | * @table: the sysctl table | |
2496 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2497 | * @buffer: the user buffer |
2498 | * @lenp: the size of the user buffer | |
2499 | * @ppos: file position | |
2500 | * | |
2501 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2502 | * values from/to the user buffer, treated as an ASCII string. | |
2503 | * | |
2504 | * Returns 0 on success. | |
2505 | */ | |
8d65af78 | 2506 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2507 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2508 | { | |
e7d316a0 SAK |
2509 | return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); |
2510 | } | |
2511 | ||
2512 | /** | |
2513 | * proc_douintvec - read a vector of unsigned integers | |
2514 | * @table: the sysctl table | |
2515 | * @write: %TRUE if this is a write to the sysctl file | |
2516 | * @buffer: the user buffer | |
2517 | * @lenp: the size of the user buffer | |
2518 | * @ppos: file position | |
2519 | * | |
2520 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2521 | * values from/to the user buffer, treated as an ASCII string. | |
2522 | * | |
2523 | * Returns 0 on success. | |
2524 | */ | |
2525 | int proc_douintvec(struct ctl_table *table, int write, | |
2526 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2527 | { | |
4f2fec00 LR |
2528 | return do_proc_douintvec(table, write, buffer, lenp, ppos, |
2529 | do_proc_douintvec_conv, NULL); | |
1da177e4 LT |
2530 | } |
2531 | ||
34f5a398 | 2532 | /* |
25ddbb18 AK |
2533 | * Taint values can only be increased |
2534 | * This means we can safely use a temporary. | |
34f5a398 | 2535 | */ |
8d65af78 | 2536 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2537 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2538 | { | |
25ddbb18 AK |
2539 | struct ctl_table t; |
2540 | unsigned long tmptaint = get_taint(); | |
2541 | int err; | |
34f5a398 | 2542 | |
91fcd412 | 2543 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2544 | return -EPERM; |
2545 | ||
25ddbb18 AK |
2546 | t = *table; |
2547 | t.data = &tmptaint; | |
8d65af78 | 2548 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2549 | if (err < 0) |
2550 | return err; | |
2551 | ||
2552 | if (write) { | |
2553 | /* | |
2554 | * Poor man's atomic or. Not worth adding a primitive | |
2555 | * to everyone's atomic.h for this | |
2556 | */ | |
2557 | int i; | |
2558 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2559 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2560 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2561 | } |
2562 | } | |
2563 | ||
2564 | return err; | |
34f5a398 TT |
2565 | } |
2566 | ||
bfdc0b49 | 2567 | #ifdef CONFIG_PRINTK |
620f6e8e | 2568 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2569 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2570 | { | |
2571 | if (write && !capable(CAP_SYS_ADMIN)) | |
2572 | return -EPERM; | |
2573 | ||
2574 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2575 | } | |
2576 | #endif | |
2577 | ||
1da177e4 LT |
2578 | struct do_proc_dointvec_minmax_conv_param { |
2579 | int *min; | |
2580 | int *max; | |
2581 | }; | |
2582 | ||
00b7c339 AW |
2583 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2584 | int *valp, | |
1da177e4 LT |
2585 | int write, void *data) |
2586 | { | |
2587 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2588 | if (write) { | |
2589 | int val = *negp ? -*lvalp : *lvalp; | |
2590 | if ((param->min && *param->min > val) || | |
2591 | (param->max && *param->max < val)) | |
2592 | return -EINVAL; | |
2593 | *valp = val; | |
2594 | } else { | |
2595 | int val = *valp; | |
2596 | if (val < 0) { | |
00b7c339 | 2597 | *negp = true; |
9a5bc726 | 2598 | *lvalp = -(unsigned long)val; |
1da177e4 | 2599 | } else { |
00b7c339 | 2600 | *negp = false; |
1da177e4 LT |
2601 | *lvalp = (unsigned long)val; |
2602 | } | |
2603 | } | |
2604 | return 0; | |
2605 | } | |
2606 | ||
2607 | /** | |
2608 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2609 | * @table: the sysctl table | |
2610 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2611 | * @buffer: the user buffer |
2612 | * @lenp: the size of the user buffer | |
2613 | * @ppos: file position | |
2614 | * | |
2615 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2616 | * values from/to the user buffer, treated as an ASCII string. | |
2617 | * | |
2618 | * This routine will ensure the values are within the range specified by | |
2619 | * table->extra1 (min) and table->extra2 (max). | |
2620 | * | |
2621 | * Returns 0 on success. | |
2622 | */ | |
8d65af78 | 2623 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2624 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2625 | { | |
2626 | struct do_proc_dointvec_minmax_conv_param param = { | |
2627 | .min = (int *) table->extra1, | |
2628 | .max = (int *) table->extra2, | |
2629 | }; | |
8d65af78 | 2630 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2631 | do_proc_dointvec_minmax_conv, ¶m); |
2632 | } | |
2633 | ||
357b57d7 TC |
2634 | #ifdef CONFIG_X86 |
2635 | int proc_dointvec_ibrs_dump(struct ctl_table *table, int write, | |
2636 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2637 | { | |
11133ff3 | 2638 | int ret, orig_inuse; |
357b57d7 TC |
2639 | unsigned int cpu; |
2640 | ||
11133ff3 | 2641 | |
357b57d7 TC |
2642 | ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); |
2643 | printk("sysctl_ibrs_enabled = %u, sysctl_ibpb_enabled = %u\n", sysctl_ibrs_enabled, sysctl_ibpb_enabled); | |
2644 | printk("use_ibrs = %d, use_ibpb = %d\n", use_ibrs, use_ibpb); | |
11133ff3 TC |
2645 | mutex_lock(&spec_ctrl_mutex); |
2646 | orig_inuse = use_ibrs; | |
2647 | /* temporary halt to ibrs usage to dump ibrs values */ | |
2648 | clear_ibrs_inuse(); | |
357b57d7 TC |
2649 | for_each_online_cpu(cpu) { |
2650 | u64 val; | |
2651 | ||
2652 | if (boot_cpu_has(X86_FEATURE_SPEC_CTRL)) | |
2653 | rdmsrl_on_cpu(cpu, MSR_IA32_SPEC_CTRL, &val); | |
2654 | else | |
2655 | val = 0; | |
2656 | printk("read cpu %d ibrs val %lu\n", cpu, (unsigned long) val); | |
2657 | } | |
11133ff3 TC |
2658 | use_ibrs = orig_inuse; |
2659 | mutex_unlock(&spec_ctrl_mutex); | |
357b57d7 TC |
2660 | return ret; |
2661 | } | |
2662 | ||
2663 | int proc_dointvec_ibrs_ctrl(struct ctl_table *table, int write, | |
2664 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2665 | { | |
2666 | int ret; | |
2667 | unsigned int cpu; | |
2668 | ||
2669 | ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2670 | pr_debug("sysctl_ibrs_enabled = %u, sysctl_ibpb_enabled = %u\n", sysctl_ibrs_enabled, sysctl_ibpb_enabled); | |
2671 | pr_debug("before:use_ibrs = %d, use_ibpb = %d\n", use_ibrs, use_ibpb); | |
11133ff3 | 2672 | mutex_lock(&spec_ctrl_mutex); |
357b57d7 TC |
2673 | if (sysctl_ibrs_enabled == 0) { |
2674 | /* always set IBRS off */ | |
2675 | set_ibrs_disabled(); | |
2676 | if (ibrs_supported) { | |
2677 | for_each_online_cpu(cpu) | |
2678 | wrmsrl_on_cpu(cpu, MSR_IA32_SPEC_CTRL, 0x0); | |
2679 | } | |
2680 | } else if (sysctl_ibrs_enabled == 2) { | |
2681 | /* always set IBRS on, even in user space */ | |
2682 | clear_ibrs_disabled(); | |
2683 | if (ibrs_supported) { | |
2684 | for_each_online_cpu(cpu) | |
2685 | wrmsrl_on_cpu(cpu, MSR_IA32_SPEC_CTRL, FEATURE_ENABLE_IBRS); | |
2686 | } else { | |
2687 | sysctl_ibrs_enabled = 0; | |
2688 | } | |
2689 | } else if (sysctl_ibrs_enabled == 1) { | |
2690 | /* use IBRS in kernel */ | |
2691 | clear_ibrs_disabled(); | |
2692 | if (!ibrs_inuse) | |
2693 | /* platform don't support ibrs */ | |
2694 | sysctl_ibrs_enabled = 0; | |
2695 | } | |
11133ff3 | 2696 | mutex_unlock(&spec_ctrl_mutex); |
357b57d7 TC |
2697 | pr_debug("after:use_ibrs = %d, use_ibpb = %d\n", use_ibrs, use_ibpb); |
2698 | return ret; | |
2699 | } | |
2700 | ||
2701 | int proc_dointvec_ibpb_ctrl(struct ctl_table *table, int write, | |
2702 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2703 | { | |
2704 | int ret; | |
2705 | ||
2706 | ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2707 | pr_debug("sysctl_ibrs_enabled = %u, sysctl_ibpb_enabled = %u\n", sysctl_ibrs_enabled, sysctl_ibpb_enabled); | |
2708 | pr_debug("before:use_ibrs = %d, use_ibpb = %d\n", use_ibrs, use_ibpb); | |
11133ff3 | 2709 | mutex_lock(&spec_ctrl_mutex); |
357b57d7 TC |
2710 | if (sysctl_ibpb_enabled == 0) |
2711 | set_ibpb_disabled(); | |
2712 | else if (sysctl_ibpb_enabled == 1) { | |
2713 | clear_ibpb_disabled(); | |
2714 | if (!ibpb_inuse) | |
2715 | /* platform don't support ibpb */ | |
2716 | sysctl_ibpb_enabled = 0; | |
2717 | } | |
11133ff3 | 2718 | mutex_unlock(&spec_ctrl_mutex); |
357b57d7 TC |
2719 | pr_debug("after:use_ibrs = %d, use_ibpb = %d\n", use_ibrs, use_ibpb); |
2720 | return ret; | |
2721 | } | |
2722 | #endif | |
2723 | ||
2724 | ||
61d9b56a LR |
2725 | struct do_proc_douintvec_minmax_conv_param { |
2726 | unsigned int *min; | |
2727 | unsigned int *max; | |
2728 | }; | |
2729 | ||
2730 | static int do_proc_douintvec_minmax_conv(unsigned long *lvalp, | |
2731 | unsigned int *valp, | |
2732 | int write, void *data) | |
2733 | { | |
2734 | struct do_proc_douintvec_minmax_conv_param *param = data; | |
2735 | ||
2736 | if (write) { | |
2737 | unsigned int val = *lvalp; | |
2738 | ||
2739 | if ((param->min && *param->min > val) || | |
2740 | (param->max && *param->max < val)) | |
2741 | return -ERANGE; | |
2742 | ||
2743 | if (*lvalp > UINT_MAX) | |
2744 | return -EINVAL; | |
2745 | *valp = val; | |
2746 | } else { | |
2747 | unsigned int val = *valp; | |
2748 | *lvalp = (unsigned long) val; | |
2749 | } | |
2750 | ||
2751 | return 0; | |
2752 | } | |
2753 | ||
2754 | /** | |
2755 | * proc_douintvec_minmax - read a vector of unsigned ints with min/max values | |
2756 | * @table: the sysctl table | |
2757 | * @write: %TRUE if this is a write to the sysctl file | |
2758 | * @buffer: the user buffer | |
2759 | * @lenp: the size of the user buffer | |
2760 | * @ppos: file position | |
2761 | * | |
2762 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2763 | * values from/to the user buffer, treated as an ASCII string. Negative | |
2764 | * strings are not allowed. | |
2765 | * | |
2766 | * This routine will ensure the values are within the range specified by | |
2767 | * table->extra1 (min) and table->extra2 (max). There is a final sanity | |
2768 | * check for UINT_MAX to avoid having to support wrap around uses from | |
2769 | * userspace. | |
2770 | * | |
2771 | * Returns 0 on success. | |
2772 | */ | |
2773 | int proc_douintvec_minmax(struct ctl_table *table, int write, | |
2774 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2775 | { | |
2776 | struct do_proc_douintvec_minmax_conv_param param = { | |
2777 | .min = (unsigned int *) table->extra1, | |
2778 | .max = (unsigned int *) table->extra2, | |
2779 | }; | |
2780 | return do_proc_douintvec(table, write, buffer, lenp, ppos, | |
2781 | do_proc_douintvec_minmax_conv, ¶m); | |
2782 | } | |
2783 | ||
54b50199 KC |
2784 | static void validate_coredump_safety(void) |
2785 | { | |
046d662f | 2786 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2787 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 | 2788 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
760c6a91 AD |
2789 | printk(KERN_WARNING |
2790 | "Unsafe core_pattern used with fs.suid_dumpable=2.\n" | |
2791 | "Pipe handler or fully qualified core dump path required.\n" | |
2792 | "Set kernel.core_pattern before fs.suid_dumpable.\n" | |
2793 | ); | |
54b50199 | 2794 | } |
046d662f | 2795 | #endif |
54b50199 KC |
2796 | } |
2797 | ||
2798 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2799 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2800 | { | |
2801 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2802 | if (!error) | |
2803 | validate_coredump_safety(); | |
2804 | return error; | |
2805 | } | |
2806 | ||
046d662f | 2807 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2808 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2809 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2810 | { | |
2811 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2812 | if (!error) | |
2813 | validate_coredump_safety(); | |
2814 | return error; | |
2815 | } | |
046d662f | 2816 | #endif |
54b50199 | 2817 | |
d8217f07 | 2818 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2819 | void __user *buffer, |
2820 | size_t *lenp, loff_t *ppos, | |
2821 | unsigned long convmul, | |
2822 | unsigned long convdiv) | |
2823 | { | |
00b7c339 AW |
2824 | unsigned long *i, *min, *max; |
2825 | int vleft, first = 1, err = 0; | |
00b7c339 | 2826 | size_t left; |
70f6cbb6 | 2827 | char *kbuf = NULL, *p; |
00b7c339 AW |
2828 | |
2829 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2830 | *lenp = 0; |
2831 | return 0; | |
2832 | } | |
00b7c339 | 2833 | |
fcfbd547 | 2834 | i = (unsigned long *) data; |
1da177e4 LT |
2835 | min = (unsigned long *) table->extra1; |
2836 | max = (unsigned long *) table->extra2; | |
2837 | vleft = table->maxlen / sizeof(unsigned long); | |
2838 | left = *lenp; | |
00b7c339 AW |
2839 | |
2840 | if (write) { | |
d383d484 LR |
2841 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2842 | goto out; | |
f4aacea2 | 2843 | |
00b7c339 AW |
2844 | if (left > PAGE_SIZE - 1) |
2845 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2846 | p = kbuf = memdup_user_nul(buffer, left); |
2847 | if (IS_ERR(kbuf)) | |
2848 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2849 | } |
2850 | ||
27b3d80a | 2851 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2852 | unsigned long val; |
2853 | ||
1da177e4 | 2854 | if (write) { |
00b7c339 AW |
2855 | bool neg; |
2856 | ||
70f6cbb6 | 2857 | left -= proc_skip_spaces(&p); |
00b7c339 | 2858 | |
70f6cbb6 | 2859 | err = proc_get_long(&p, &left, &val, &neg, |
00b7c339 AW |
2860 | proc_wspace_sep, |
2861 | sizeof(proc_wspace_sep), NULL); | |
2862 | if (err) | |
1da177e4 LT |
2863 | break; |
2864 | if (neg) | |
1da177e4 | 2865 | continue; |
ff9f8a7c | 2866 | val = convmul * val / convdiv; |
1da177e4 LT |
2867 | if ((min && val < *min) || (max && val > *max)) |
2868 | continue; | |
2869 | *i = val; | |
2870 | } else { | |
00b7c339 | 2871 | val = convdiv * (*i) / convmul; |
7833819d | 2872 | if (!first) { |
00b7c339 | 2873 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2874 | if (err) |
2875 | break; | |
2876 | } | |
00b7c339 AW |
2877 | err = proc_put_long(&buffer, &left, val, false); |
2878 | if (err) | |
2879 | break; | |
1da177e4 LT |
2880 | } |
2881 | } | |
2882 | ||
00b7c339 AW |
2883 | if (!write && !first && left && !err) |
2884 | err = proc_put_char(&buffer, &left, '\n'); | |
2885 | if (write && !err) | |
70f6cbb6 | 2886 | left -= proc_skip_spaces(&p); |
1da177e4 | 2887 | if (write) { |
70f6cbb6 | 2888 | kfree(kbuf); |
00b7c339 AW |
2889 | if (first) |
2890 | return err ? : -EINVAL; | |
1da177e4 | 2891 | } |
1da177e4 | 2892 | *lenp -= left; |
f4aacea2 | 2893 | out: |
1da177e4 | 2894 | *ppos += *lenp; |
00b7c339 | 2895 | return err; |
1da177e4 LT |
2896 | } |
2897 | ||
d8217f07 | 2898 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2899 | void __user *buffer, |
2900 | size_t *lenp, loff_t *ppos, | |
2901 | unsigned long convmul, | |
2902 | unsigned long convdiv) | |
2903 | { | |
2904 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2905 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2906 | } |
2907 | ||
1da177e4 LT |
2908 | /** |
2909 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2910 | * @table: the sysctl table | |
2911 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2912 | * @buffer: the user buffer |
2913 | * @lenp: the size of the user buffer | |
2914 | * @ppos: file position | |
2915 | * | |
2916 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2917 | * values from/to the user buffer, treated as an ASCII string. | |
2918 | * | |
2919 | * This routine will ensure the values are within the range specified by | |
2920 | * table->extra1 (min) and table->extra2 (max). | |
2921 | * | |
2922 | * Returns 0 on success. | |
2923 | */ | |
8d65af78 | 2924 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2925 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2926 | { | |
8d65af78 | 2927 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2928 | } |
2929 | ||
2930 | /** | |
2931 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2932 | * @table: the sysctl table | |
2933 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2934 | * @buffer: the user buffer |
2935 | * @lenp: the size of the user buffer | |
2936 | * @ppos: file position | |
2937 | * | |
2938 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2939 | * values from/to the user buffer, treated as an ASCII string. The values | |
2940 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2941 | * | |
2942 | * This routine will ensure the values are within the range specified by | |
2943 | * table->extra1 (min) and table->extra2 (max). | |
2944 | * | |
2945 | * Returns 0 on success. | |
2946 | */ | |
d8217f07 | 2947 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2948 | void __user *buffer, |
2949 | size_t *lenp, loff_t *ppos) | |
2950 | { | |
8d65af78 | 2951 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2952 | lenp, ppos, HZ, 1000l); |
2953 | } | |
2954 | ||
2955 | ||
00b7c339 | 2956 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2957 | int *valp, |
2958 | int write, void *data) | |
2959 | { | |
2960 | if (write) { | |
63259457 | 2961 | if (*lvalp > INT_MAX / HZ) |
cba9f33d | 2962 | return 1; |
1da177e4 LT |
2963 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2964 | } else { | |
2965 | int val = *valp; | |
2966 | unsigned long lval; | |
2967 | if (val < 0) { | |
00b7c339 | 2968 | *negp = true; |
9a5bc726 | 2969 | lval = -(unsigned long)val; |
1da177e4 | 2970 | } else { |
00b7c339 | 2971 | *negp = false; |
1da177e4 LT |
2972 | lval = (unsigned long)val; |
2973 | } | |
2974 | *lvalp = lval / HZ; | |
2975 | } | |
2976 | return 0; | |
2977 | } | |
2978 | ||
00b7c339 | 2979 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2980 | int *valp, |
2981 | int write, void *data) | |
2982 | { | |
2983 | if (write) { | |
cba9f33d BS |
2984 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2985 | return 1; | |
1da177e4 LT |
2986 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2987 | } else { | |
2988 | int val = *valp; | |
2989 | unsigned long lval; | |
2990 | if (val < 0) { | |
00b7c339 | 2991 | *negp = true; |
9a5bc726 | 2992 | lval = -(unsigned long)val; |
1da177e4 | 2993 | } else { |
00b7c339 | 2994 | *negp = false; |
1da177e4 LT |
2995 | lval = (unsigned long)val; |
2996 | } | |
2997 | *lvalp = jiffies_to_clock_t(lval); | |
2998 | } | |
2999 | return 0; | |
3000 | } | |
3001 | ||
00b7c339 | 3002 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
3003 | int *valp, |
3004 | int write, void *data) | |
3005 | { | |
3006 | if (write) { | |
d738ce8f FF |
3007 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
3008 | ||
3009 | if (jif > INT_MAX) | |
3010 | return 1; | |
3011 | *valp = (int)jif; | |
1da177e4 LT |
3012 | } else { |
3013 | int val = *valp; | |
3014 | unsigned long lval; | |
3015 | if (val < 0) { | |
00b7c339 | 3016 | *negp = true; |
9a5bc726 | 3017 | lval = -(unsigned long)val; |
1da177e4 | 3018 | } else { |
00b7c339 | 3019 | *negp = false; |
1da177e4 LT |
3020 | lval = (unsigned long)val; |
3021 | } | |
3022 | *lvalp = jiffies_to_msecs(lval); | |
3023 | } | |
3024 | return 0; | |
3025 | } | |
3026 | ||
3027 | /** | |
3028 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
3029 | * @table: the sysctl table | |
3030 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
3031 | * @buffer: the user buffer |
3032 | * @lenp: the size of the user buffer | |
3033 | * @ppos: file position | |
3034 | * | |
3035 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
3036 | * values from/to the user buffer, treated as an ASCII string. | |
3037 | * The values read are assumed to be in seconds, and are converted into | |
3038 | * jiffies. | |
3039 | * | |
3040 | * Returns 0 on success. | |
3041 | */ | |
8d65af78 | 3042 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3043 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3044 | { | |
8d65af78 | 3045 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
3046 | do_proc_dointvec_jiffies_conv,NULL); |
3047 | } | |
3048 | ||
3049 | /** | |
3050 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
3051 | * @table: the sysctl table | |
3052 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
3053 | * @buffer: the user buffer |
3054 | * @lenp: the size of the user buffer | |
1e5d5331 | 3055 | * @ppos: pointer to the file position |
1da177e4 LT |
3056 | * |
3057 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
3058 | * values from/to the user buffer, treated as an ASCII string. | |
3059 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
3060 | * are converted into jiffies. | |
3061 | * | |
3062 | * Returns 0 on success. | |
3063 | */ | |
8d65af78 | 3064 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3065 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3066 | { | |
8d65af78 | 3067 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
3068 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
3069 | } | |
3070 | ||
3071 | /** | |
3072 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
3073 | * @table: the sysctl table | |
3074 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
3075 | * @buffer: the user buffer |
3076 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
3077 | * @ppos: file position |
3078 | * @ppos: the current position in the file | |
1da177e4 LT |
3079 | * |
3080 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
3081 | * values from/to the user buffer, treated as an ASCII string. | |
3082 | * The values read are assumed to be in 1/1000 seconds, and | |
3083 | * are converted into jiffies. | |
3084 | * | |
3085 | * Returns 0 on success. | |
3086 | */ | |
8d65af78 | 3087 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3088 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3089 | { | |
8d65af78 | 3090 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
3091 | do_proc_dointvec_ms_jiffies_conv, NULL); |
3092 | } | |
3093 | ||
8d65af78 | 3094 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
3095 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3096 | { | |
3097 | struct pid *new_pid; | |
3098 | pid_t tmp; | |
3099 | int r; | |
3100 | ||
6c5f3e7b | 3101 | tmp = pid_vnr(cad_pid); |
9ec52099 | 3102 | |
8d65af78 | 3103 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
3104 | lenp, ppos, NULL, NULL); |
3105 | if (r || !write) | |
3106 | return r; | |
3107 | ||
3108 | new_pid = find_get_pid(tmp); | |
3109 | if (!new_pid) | |
3110 | return -ESRCH; | |
3111 | ||
3112 | put_pid(xchg(&cad_pid, new_pid)); | |
3113 | return 0; | |
3114 | } | |
3115 | ||
9f977fb7 OP |
3116 | /** |
3117 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
3118 | * @table: the sysctl table | |
3119 | * @write: %TRUE if this is a write to the sysctl file | |
3120 | * @buffer: the user buffer | |
3121 | * @lenp: the size of the user buffer | |
3122 | * @ppos: file position | |
3123 | * | |
3124 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
3125 | * in table->maxlen. | |
3126 | * | |
3127 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
3128 | * large bitmaps may be represented in a compact manner. Writing into | |
3129 | * the file will clear the bitmap then update it with the given input. | |
3130 | * | |
3131 | * Returns 0 on success. | |
3132 | */ | |
3133 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
3134 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3135 | { | |
3136 | int err = 0; | |
3137 | bool first = 1; | |
3138 | size_t left = *lenp; | |
3139 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 3140 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
3141 | unsigned long *tmp_bitmap = NULL; |
3142 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
3143 | ||
122ff243 | 3144 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
3145 | *lenp = 0; |
3146 | return 0; | |
3147 | } | |
3148 | ||
3149 | if (write) { | |
70f6cbb6 | 3150 | char *kbuf, *p; |
9f977fb7 OP |
3151 | |
3152 | if (left > PAGE_SIZE - 1) | |
3153 | left = PAGE_SIZE - 1; | |
3154 | ||
70f6cbb6 AV |
3155 | p = kbuf = memdup_user_nul(buffer, left); |
3156 | if (IS_ERR(kbuf)) | |
3157 | return PTR_ERR(kbuf); | |
9f977fb7 OP |
3158 | |
3159 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
3160 | GFP_KERNEL); | |
3161 | if (!tmp_bitmap) { | |
70f6cbb6 | 3162 | kfree(kbuf); |
9f977fb7 OP |
3163 | return -ENOMEM; |
3164 | } | |
70f6cbb6 | 3165 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 OP |
3166 | while (!err && left) { |
3167 | unsigned long val_a, val_b; | |
3168 | bool neg; | |
3169 | ||
70f6cbb6 | 3170 | err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
9f977fb7 OP |
3171 | sizeof(tr_a), &c); |
3172 | if (err) | |
3173 | break; | |
3174 | if (val_a >= bitmap_len || neg) { | |
3175 | err = -EINVAL; | |
3176 | break; | |
3177 | } | |
3178 | ||
3179 | val_b = val_a; | |
3180 | if (left) { | |
70f6cbb6 | 3181 | p++; |
9f977fb7 OP |
3182 | left--; |
3183 | } | |
3184 | ||
3185 | if (c == '-') { | |
70f6cbb6 | 3186 | err = proc_get_long(&p, &left, &val_b, |
9f977fb7 OP |
3187 | &neg, tr_b, sizeof(tr_b), |
3188 | &c); | |
3189 | if (err) | |
3190 | break; | |
3191 | if (val_b >= bitmap_len || neg || | |
3192 | val_a > val_b) { | |
3193 | err = -EINVAL; | |
3194 | break; | |
3195 | } | |
3196 | if (left) { | |
70f6cbb6 | 3197 | p++; |
9f977fb7 OP |
3198 | left--; |
3199 | } | |
3200 | } | |
3201 | ||
5a04cca6 | 3202 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 | 3203 | first = 0; |
70f6cbb6 | 3204 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 | 3205 | } |
70f6cbb6 | 3206 | kfree(kbuf); |
9f977fb7 OP |
3207 | } else { |
3208 | unsigned long bit_a, bit_b = 0; | |
3209 | ||
3210 | while (left) { | |
3211 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
3212 | if (bit_a >= bitmap_len) | |
3213 | break; | |
3214 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
3215 | bit_a + 1) - 1; | |
3216 | ||
3217 | if (!first) { | |
3218 | err = proc_put_char(&buffer, &left, ','); | |
3219 | if (err) | |
3220 | break; | |
3221 | } | |
3222 | err = proc_put_long(&buffer, &left, bit_a, false); | |
3223 | if (err) | |
3224 | break; | |
3225 | if (bit_a != bit_b) { | |
3226 | err = proc_put_char(&buffer, &left, '-'); | |
3227 | if (err) | |
3228 | break; | |
3229 | err = proc_put_long(&buffer, &left, bit_b, false); | |
3230 | if (err) | |
3231 | break; | |
3232 | } | |
3233 | ||
3234 | first = 0; bit_b++; | |
3235 | } | |
3236 | if (!err) | |
3237 | err = proc_put_char(&buffer, &left, '\n'); | |
3238 | } | |
3239 | ||
3240 | if (!err) { | |
3241 | if (write) { | |
3242 | if (*ppos) | |
3243 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
3244 | else | |
5a04cca6 | 3245 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 OP |
3246 | } |
3247 | kfree(tmp_bitmap); | |
3248 | *lenp -= left; | |
3249 | *ppos += *lenp; | |
3250 | return 0; | |
3251 | } else { | |
3252 | kfree(tmp_bitmap); | |
3253 | return err; | |
3254 | } | |
3255 | } | |
3256 | ||
55610500 | 3257 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3258 | |
8d65af78 | 3259 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
3260 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3261 | { | |
3262 | return -ENOSYS; | |
3263 | } | |
3264 | ||
8d65af78 | 3265 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 3266 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
3267 | { |
3268 | return -ENOSYS; | |
3269 | } | |
3270 | ||
e7d316a0 SAK |
3271 | int proc_douintvec(struct ctl_table *table, int write, |
3272 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3273 | { | |
3274 | return -ENOSYS; | |
3275 | } | |
3276 | ||
8d65af78 | 3277 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3278 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3279 | { | |
3280 | return -ENOSYS; | |
3281 | } | |
3282 | ||
61d9b56a LR |
3283 | int proc_douintvec_minmax(struct ctl_table *table, int write, |
3284 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3285 | { | |
3286 | return -ENOSYS; | |
3287 | } | |
3288 | ||
8d65af78 | 3289 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3290 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3291 | { | |
3292 | return -ENOSYS; | |
3293 | } | |
3294 | ||
8d65af78 | 3295 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3296 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3297 | { | |
3298 | return -ENOSYS; | |
3299 | } | |
3300 | ||
8d65af78 | 3301 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3302 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3303 | { | |
3304 | return -ENOSYS; | |
3305 | } | |
3306 | ||
8d65af78 | 3307 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3308 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3309 | { | |
3310 | return -ENOSYS; | |
3311 | } | |
3312 | ||
d8217f07 | 3313 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3314 | void __user *buffer, |
3315 | size_t *lenp, loff_t *ppos) | |
3316 | { | |
3317 | return -ENOSYS; | |
3318 | } | |
3319 | ||
3320 | ||
55610500 | 3321 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3322 | |
1da177e4 LT |
3323 | /* |
3324 | * No sense putting this after each symbol definition, twice, | |
3325 | * exception granted :-) | |
3326 | */ | |
3327 | EXPORT_SYMBOL(proc_dointvec); | |
e7d316a0 | 3328 | EXPORT_SYMBOL(proc_douintvec); |
1da177e4 LT |
3329 | EXPORT_SYMBOL(proc_dointvec_jiffies); |
3330 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
61d9b56a | 3331 | EXPORT_SYMBOL_GPL(proc_douintvec_minmax); |
1da177e4 LT |
3332 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); |
3333 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
3334 | EXPORT_SYMBOL(proc_dostring); | |
3335 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
3336 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |