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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> |
fd4b616b | 33 | #include <linux/kmemleak.h> |
62239ac2 | 34 | #include <linux/fs.h> |
1da177e4 LT |
35 | #include <linux/init.h> |
36 | #include <linux/kernel.h> | |
0296b228 | 37 | #include <linux/kobject.h> |
20380731 | 38 | #include <linux/net.h> |
1da177e4 LT |
39 | #include <linux/sysrq.h> |
40 | #include <linux/highuid.h> | |
41 | #include <linux/writeback.h> | |
3fff4c42 | 42 | #include <linux/ratelimit.h> |
76ab0f53 | 43 | #include <linux/compaction.h> |
1da177e4 | 44 | #include <linux/hugetlb.h> |
1da177e4 | 45 | #include <linux/initrd.h> |
0b77f5bf | 46 | #include <linux/key.h> |
1da177e4 LT |
47 | #include <linux/times.h> |
48 | #include <linux/limits.h> | |
49 | #include <linux/dcache.h> | |
6e006701 | 50 | #include <linux/dnotify.h> |
1da177e4 | 51 | #include <linux/syscalls.h> |
c748e134 | 52 | #include <linux/vmstat.h> |
c255d844 PM |
53 | #include <linux/nfs_fs.h> |
54 | #include <linux/acpi.h> | |
10a0a8d4 | 55 | #include <linux/reboot.h> |
b0fc494f | 56 | #include <linux/ftrace.h> |
cdd6c482 | 57 | #include <linux/perf_event.h> |
b2be84df | 58 | #include <linux/kprobes.h> |
b492e95b | 59 | #include <linux/pipe_fs_i.h> |
8e4228e1 | 60 | #include <linux/oom.h> |
17f60a7d | 61 | #include <linux/kmod.h> |
73efc039 | 62 | #include <linux/capability.h> |
40401530 | 63 | #include <linux/binfmts.h> |
cf4aebc2 | 64 | #include <linux/sched/sysctl.h> |
f7ccbae4 | 65 | #include <linux/sched/coredump.h> |
7984754b | 66 | #include <linux/kexec.h> |
1be7f75d | 67 | #include <linux/bpf.h> |
d2921684 | 68 | #include <linux/mount.h> |
7a8d1819 | 69 | #include <linux/pipe_fs_i.h> |
1da177e4 | 70 | |
7c0f6ba6 | 71 | #include <linux/uaccess.h> |
1da177e4 LT |
72 | #include <asm/processor.h> |
73 | ||
29cbc78b AK |
74 | #ifdef CONFIG_X86 |
75 | #include <asm/nmi.h> | |
0741f4d2 | 76 | #include <asm/stacktrace.h> |
6e7c4025 | 77 | #include <asm/io.h> |
29cbc78b | 78 | #endif |
d550bbd4 DH |
79 | #ifdef CONFIG_SPARC |
80 | #include <asm/setup.h> | |
81 | #endif | |
c55b7c3e DY |
82 | #ifdef CONFIG_BSD_PROCESS_ACCT |
83 | #include <linux/acct.h> | |
84 | #endif | |
4f0e056f DY |
85 | #ifdef CONFIG_RT_MUTEXES |
86 | #include <linux/rtmutex.h> | |
87 | #endif | |
2edf5e49 DY |
88 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
89 | #include <linux/lockdep.h> | |
90 | #endif | |
15485a46 DY |
91 | #ifdef CONFIG_CHR_DEV_SG |
92 | #include <scsi/sg.h> | |
93 | #endif | |
29cbc78b | 94 | |
58687acb | 95 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
96 | #include <linux/nmi.h> |
97 | #endif | |
98 | ||
1da177e4 LT |
99 | #if defined(CONFIG_SYSCTL) |
100 | ||
101 | /* External variables not in a header file. */ | |
d6e71144 | 102 | extern int suid_dumpable; |
046d662f AK |
103 | #ifdef CONFIG_COREDUMP |
104 | extern int core_uses_pid; | |
1da177e4 | 105 | extern char core_pattern[]; |
a293980c | 106 | extern unsigned int core_pipe_limit; |
046d662f | 107 | #endif |
680f7875 SH |
108 | #ifdef CONFIG_USER_NS |
109 | extern int unprivileged_userns_clone; | |
110 | #endif | |
1da177e4 | 111 | extern int pid_max; |
1da177e4 | 112 | extern int pid_max_min, pid_max_max; |
8ad4b1fb | 113 | extern int percpu_pagelist_fraction; |
9745512c | 114 | extern int latencytop_enabled; |
9b80a184 | 115 | extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
116 | #ifndef CONFIG_MMU |
117 | extern int sysctl_nr_trim_pages; | |
118 | #endif | |
1da177e4 | 119 | |
c4f3b63f | 120 | /* Constants used for minimum and maximum */ |
2508ce18 | 121 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f RT |
122 | static int sixty = 60; |
123 | #endif | |
124 | ||
270750db AT |
125 | static int __maybe_unused neg_one = -1; |
126 | ||
c4f3b63f | 127 | static int zero; |
cd5f9a4c LT |
128 | static int __maybe_unused one = 1; |
129 | static int __maybe_unused two = 2; | |
5509a5d2 | 130 | static int __maybe_unused four = 4; |
fc3501d4 | 131 | static unsigned long one_ul = 1; |
c4f3b63f | 132 | static int one_hundred = 100; |
795ae7a0 | 133 | static int one_thousand = 1000; |
af91322e DY |
134 | #ifdef CONFIG_PRINTK |
135 | static int ten_thousand = 10000; | |
136 | #endif | |
c5dfd78e ACM |
137 | #ifdef CONFIG_PERF_EVENTS |
138 | static int six_hundred_forty_kb = 640 * 1024; | |
139 | #endif | |
c4f3b63f | 140 | |
9e4a5bda AR |
141 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
142 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
143 | ||
1da177e4 LT |
144 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
145 | static int maxolduid = 65535; | |
146 | static int minolduid; | |
147 | ||
148 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 149 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 150 | |
80df2847 LH |
151 | /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */ |
152 | #ifdef CONFIG_DETECT_HUNG_TASK | |
153 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
154 | #endif | |
155 | ||
d14f1729 DY |
156 | #ifdef CONFIG_INOTIFY_USER |
157 | #include <linux/inotify.h> | |
158 | #endif | |
72c57ed5 | 159 | #ifdef CONFIG_SPARC |
1da177e4 LT |
160 | #endif |
161 | ||
162 | #ifdef __hppa__ | |
163 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
164 | #endif |
165 | ||
166 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
167 | extern int unaligned_enabled; |
168 | #endif | |
1da177e4 | 169 | |
d2b176ed | 170 | #ifdef CONFIG_IA64 |
88fc241f | 171 | extern int unaligned_dump_stack; |
d2b176ed JS |
172 | #endif |
173 | ||
b6fca725 VG |
174 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
175 | extern int no_unaligned_warning; | |
176 | #endif | |
177 | ||
d6f8ff73 | 178 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 | 179 | |
a19ac337 LR |
180 | /** |
181 | * enum sysctl_writes_mode - supported sysctl write modes | |
182 | * | |
183 | * @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value | |
184 | * to be written, and multiple writes on the same sysctl file descriptor | |
185 | * will rewrite the sysctl value, regardless of file position. No warning | |
186 | * is issued when the initial position is not 0. | |
187 | * @SYSCTL_WRITES_WARN: same as above but warn when the initial file position is | |
188 | * not 0. | |
189 | * @SYSCTL_WRITES_STRICT: writes to numeric sysctl entries must always be at | |
190 | * file position 0 and the value must be fully contained in the buffer | |
191 | * sent to the write syscall. If dealing with strings respect the file | |
192 | * position, but restrict this to the max length of the buffer, anything | |
193 | * passed the max lenght will be ignored. Multiple writes will append | |
194 | * to the buffer. | |
195 | * | |
196 | * These write modes control how current file position affects the behavior of | |
197 | * updating sysctl values through the proc interface on each write. | |
198 | */ | |
199 | enum sysctl_writes_mode { | |
200 | SYSCTL_WRITES_LEGACY = -1, | |
201 | SYSCTL_WRITES_WARN = 0, | |
202 | SYSCTL_WRITES_STRICT = 1, | |
203 | }; | |
f4aacea2 | 204 | |
a19ac337 | 205 | static enum sysctl_writes_mode sysctl_writes_strict = SYSCTL_WRITES_STRICT; |
f4aacea2 | 206 | |
8d65af78 | 207 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 208 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 209 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 210 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 211 | #endif |
9ec52099 | 212 | |
bfdc0b49 | 213 | #ifdef CONFIG_PRINTK |
620f6e8e | 214 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
215 | void __user *buffer, size_t *lenp, loff_t *ppos); |
216 | #endif | |
217 | ||
54b50199 KC |
218 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
219 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 220 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
221 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
222 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 223 | #endif |
54b50199 | 224 | |
97f5f0cd | 225 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 | 226 | /* Note: sysrq code uses it's own private copy */ |
8eaede49 | 227 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd | 228 | |
6f8fd1d7 | 229 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, |
97f5f0cd DT |
230 | void __user *buffer, size_t *lenp, |
231 | loff_t *ppos) | |
232 | { | |
233 | int error; | |
234 | ||
235 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
236 | if (error) | |
237 | return error; | |
238 | ||
239 | if (write) | |
240 | sysrq_toggle_support(__sysrq_enabled); | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | #endif | |
246 | ||
d8217f07 EB |
247 | static struct ctl_table kern_table[]; |
248 | static struct ctl_table vm_table[]; | |
249 | static struct ctl_table fs_table[]; | |
250 | static struct ctl_table debug_table[]; | |
251 | static struct ctl_table dev_table[]; | |
252 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
253 | #ifdef CONFIG_EPOLL |
254 | extern struct ctl_table epoll_table[]; | |
255 | #endif | |
1da177e4 LT |
256 | |
257 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
258 | int sysctl_legacy_va_layout; | |
259 | #endif | |
260 | ||
1da177e4 LT |
261 | /* The default sysctl tables: */ |
262 | ||
de4e83bd | 263 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 264 | { |
1da177e4 LT |
265 | .procname = "kernel", |
266 | .mode = 0555, | |
267 | .child = kern_table, | |
268 | }, | |
269 | { | |
1da177e4 LT |
270 | .procname = "vm", |
271 | .mode = 0555, | |
272 | .child = vm_table, | |
273 | }, | |
1da177e4 | 274 | { |
1da177e4 LT |
275 | .procname = "fs", |
276 | .mode = 0555, | |
277 | .child = fs_table, | |
278 | }, | |
279 | { | |
1da177e4 LT |
280 | .procname = "debug", |
281 | .mode = 0555, | |
282 | .child = debug_table, | |
283 | }, | |
284 | { | |
1da177e4 LT |
285 | .procname = "dev", |
286 | .mode = 0555, | |
287 | .child = dev_table, | |
288 | }, | |
6fce56ec | 289 | { } |
1da177e4 LT |
290 | }; |
291 | ||
77e54a1f | 292 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
293 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
294 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
295 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
296 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 297 | #ifdef CONFIG_SMP |
1983a922 CE |
298 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
299 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
300 | #endif /* CONFIG_SMP */ |
301 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 302 | |
5e771905 MG |
303 | #ifdef CONFIG_COMPACTION |
304 | static int min_extfrag_threshold; | |
305 | static int max_extfrag_threshold = 1000; | |
306 | #endif | |
307 | ||
d8217f07 | 308 | static struct ctl_table kern_table[] = { |
2bba22c5 | 309 | { |
2bba22c5 MG |
310 | .procname = "sched_child_runs_first", |
311 | .data = &sysctl_sched_child_runs_first, | |
312 | .maxlen = sizeof(unsigned int), | |
313 | .mode = 0644, | |
6d456111 | 314 | .proc_handler = proc_dointvec, |
2bba22c5 | 315 | }, |
77e54a1f IM |
316 | #ifdef CONFIG_SCHED_DEBUG |
317 | { | |
b2be5e96 PZ |
318 | .procname = "sched_min_granularity_ns", |
319 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
320 | .maxlen = sizeof(unsigned int), |
321 | .mode = 0644, | |
702a7c76 | 322 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
323 | .extra1 = &min_sched_granularity_ns, |
324 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 325 | }, |
21805085 | 326 | { |
21805085 PZ |
327 | .procname = "sched_latency_ns", |
328 | .data = &sysctl_sched_latency, | |
329 | .maxlen = sizeof(unsigned int), | |
330 | .mode = 0644, | |
702a7c76 | 331 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
332 | .extra1 = &min_sched_granularity_ns, |
333 | .extra2 = &max_sched_granularity_ns, | |
334 | }, | |
77e54a1f | 335 | { |
77e54a1f IM |
336 | .procname = "sched_wakeup_granularity_ns", |
337 | .data = &sysctl_sched_wakeup_granularity, | |
338 | .maxlen = sizeof(unsigned int), | |
339 | .mode = 0644, | |
702a7c76 | 340 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
341 | .extra1 = &min_wakeup_granularity_ns, |
342 | .extra2 = &max_wakeup_granularity_ns, | |
343 | }, | |
cbee9f88 | 344 | #ifdef CONFIG_SMP |
1983a922 | 345 | { |
1983a922 CE |
346 | .procname = "sched_tunable_scaling", |
347 | .data = &sysctl_sched_tunable_scaling, | |
348 | .maxlen = sizeof(enum sched_tunable_scaling), | |
349 | .mode = 0644, | |
702a7c76 | 350 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
351 | .extra1 = &min_sched_tunable_scaling, |
352 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 353 | }, |
da84d961 | 354 | { |
d00535db | 355 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
356 | .data = &sysctl_sched_migration_cost, |
357 | .maxlen = sizeof(unsigned int), | |
358 | .mode = 0644, | |
6d456111 | 359 | .proc_handler = proc_dointvec, |
da84d961 | 360 | }, |
b82d9fdd | 361 | { |
b82d9fdd PZ |
362 | .procname = "sched_nr_migrate", |
363 | .data = &sysctl_sched_nr_migrate, | |
364 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 365 | .mode = 0644, |
6d456111 | 366 | .proc_handler = proc_dointvec, |
fa85ae24 | 367 | }, |
e9e9250b | 368 | { |
d00535db | 369 | .procname = "sched_time_avg_ms", |
e9e9250b PZ |
370 | .data = &sysctl_sched_time_avg, |
371 | .maxlen = sizeof(unsigned int), | |
372 | .mode = 0644, | |
5ccba44b EZ |
373 | .proc_handler = proc_dointvec_minmax, |
374 | .extra1 = &one, | |
e9e9250b | 375 | }, |
cb251765 MG |
376 | #ifdef CONFIG_SCHEDSTATS |
377 | { | |
378 | .procname = "sched_schedstats", | |
379 | .data = NULL, | |
380 | .maxlen = sizeof(unsigned int), | |
381 | .mode = 0644, | |
382 | .proc_handler = sysctl_schedstats, | |
383 | .extra1 = &zero, | |
384 | .extra2 = &one, | |
385 | }, | |
386 | #endif /* CONFIG_SCHEDSTATS */ | |
cbee9f88 PZ |
387 | #endif /* CONFIG_SMP */ |
388 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
389 | { |
390 | .procname = "numa_balancing_scan_delay_ms", | |
391 | .data = &sysctl_numa_balancing_scan_delay, | |
392 | .maxlen = sizeof(unsigned int), | |
393 | .mode = 0644, | |
394 | .proc_handler = proc_dointvec, | |
395 | }, | |
cbee9f88 PZ |
396 | { |
397 | .procname = "numa_balancing_scan_period_min_ms", | |
398 | .data = &sysctl_numa_balancing_scan_period_min, | |
399 | .maxlen = sizeof(unsigned int), | |
400 | .mode = 0644, | |
401 | .proc_handler = proc_dointvec, | |
402 | }, | |
403 | { | |
404 | .procname = "numa_balancing_scan_period_max_ms", | |
405 | .data = &sysctl_numa_balancing_scan_period_max, | |
406 | .maxlen = sizeof(unsigned int), | |
407 | .mode = 0644, | |
408 | .proc_handler = proc_dointvec, | |
409 | }, | |
6e5fb223 PZ |
410 | { |
411 | .procname = "numa_balancing_scan_size_mb", | |
412 | .data = &sysctl_numa_balancing_scan_size, | |
413 | .maxlen = sizeof(unsigned int), | |
414 | .mode = 0644, | |
64192658 KT |
415 | .proc_handler = proc_dointvec_minmax, |
416 | .extra1 = &one, | |
6e5fb223 | 417 | }, |
54a43d54 AK |
418 | { |
419 | .procname = "numa_balancing", | |
420 | .data = NULL, /* filled in by handler */ | |
421 | .maxlen = sizeof(unsigned int), | |
422 | .mode = 0644, | |
423 | .proc_handler = sysctl_numa_balancing, | |
424 | .extra1 = &zero, | |
425 | .extra2 = &one, | |
426 | }, | |
cbee9f88 PZ |
427 | #endif /* CONFIG_NUMA_BALANCING */ |
428 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 429 | { |
9f0c1e56 PZ |
430 | .procname = "sched_rt_period_us", |
431 | .data = &sysctl_sched_rt_period, | |
432 | .maxlen = sizeof(unsigned int), | |
433 | .mode = 0644, | |
6d456111 | 434 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
435 | }, |
436 | { | |
9f0c1e56 PZ |
437 | .procname = "sched_rt_runtime_us", |
438 | .data = &sysctl_sched_rt_runtime, | |
439 | .maxlen = sizeof(int), | |
440 | .mode = 0644, | |
6d456111 | 441 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 442 | }, |
ce0dbbbb CW |
443 | { |
444 | .procname = "sched_rr_timeslice_ms", | |
975e155e | 445 | .data = &sysctl_sched_rr_timeslice, |
ce0dbbbb CW |
446 | .maxlen = sizeof(int), |
447 | .mode = 0644, | |
448 | .proc_handler = sched_rr_handler, | |
449 | }, | |
5091faa4 MG |
450 | #ifdef CONFIG_SCHED_AUTOGROUP |
451 | { | |
452 | .procname = "sched_autogroup_enabled", | |
453 | .data = &sysctl_sched_autogroup_enabled, | |
454 | .maxlen = sizeof(unsigned int), | |
455 | .mode = 0644, | |
1747b21f | 456 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
457 | .extra1 = &zero, |
458 | .extra2 = &one, | |
459 | }, | |
460 | #endif | |
ec12cb7f PT |
461 | #ifdef CONFIG_CFS_BANDWIDTH |
462 | { | |
463 | .procname = "sched_cfs_bandwidth_slice_us", | |
464 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
465 | .maxlen = sizeof(unsigned int), | |
466 | .mode = 0644, | |
467 | .proc_handler = proc_dointvec_minmax, | |
468 | .extra1 = &one, | |
469 | }, | |
470 | #endif | |
f20786ff PZ |
471 | #ifdef CONFIG_PROVE_LOCKING |
472 | { | |
f20786ff PZ |
473 | .procname = "prove_locking", |
474 | .data = &prove_locking, | |
475 | .maxlen = sizeof(int), | |
476 | .mode = 0644, | |
6d456111 | 477 | .proc_handler = proc_dointvec, |
f20786ff PZ |
478 | }, |
479 | #endif | |
480 | #ifdef CONFIG_LOCK_STAT | |
481 | { | |
f20786ff PZ |
482 | .procname = "lock_stat", |
483 | .data = &lock_stat, | |
484 | .maxlen = sizeof(int), | |
485 | .mode = 0644, | |
6d456111 | 486 | .proc_handler = proc_dointvec, |
f20786ff | 487 | }, |
77e54a1f | 488 | #endif |
1da177e4 | 489 | { |
1da177e4 LT |
490 | .procname = "panic", |
491 | .data = &panic_timeout, | |
492 | .maxlen = sizeof(int), | |
493 | .mode = 0644, | |
6d456111 | 494 | .proc_handler = proc_dointvec, |
1da177e4 | 495 | }, |
046d662f | 496 | #ifdef CONFIG_COREDUMP |
1da177e4 | 497 | { |
1da177e4 LT |
498 | .procname = "core_uses_pid", |
499 | .data = &core_uses_pid, | |
500 | .maxlen = sizeof(int), | |
501 | .mode = 0644, | |
6d456111 | 502 | .proc_handler = proc_dointvec, |
1da177e4 LT |
503 | }, |
504 | { | |
1da177e4 LT |
505 | .procname = "core_pattern", |
506 | .data = core_pattern, | |
71ce92f3 | 507 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 508 | .mode = 0644, |
54b50199 | 509 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 510 | }, |
a293980c | 511 | { |
a293980c NH |
512 | .procname = "core_pipe_limit", |
513 | .data = &core_pipe_limit, | |
514 | .maxlen = sizeof(unsigned int), | |
515 | .mode = 0644, | |
6d456111 | 516 | .proc_handler = proc_dointvec, |
680f7875 SH |
517 | }, |
518 | #endif | |
519 | #ifdef CONFIG_USER_NS | |
520 | { | |
521 | .procname = "unprivileged_userns_clone", | |
522 | .data = &unprivileged_userns_clone, | |
523 | .maxlen = sizeof(int), | |
524 | .mode = 0644, | |
525 | .proc_handler = proc_dointvec, | |
a293980c | 526 | }, |
046d662f | 527 | #endif |
34f5a398 | 528 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 529 | { |
1da177e4 | 530 | .procname = "tainted", |
25ddbb18 | 531 | .maxlen = sizeof(long), |
34f5a398 | 532 | .mode = 0644, |
6d456111 | 533 | .proc_handler = proc_taint, |
1da177e4 | 534 | }, |
f4aacea2 KC |
535 | { |
536 | .procname = "sysctl_writes_strict", | |
537 | .data = &sysctl_writes_strict, | |
538 | .maxlen = sizeof(int), | |
539 | .mode = 0644, | |
540 | .proc_handler = proc_dointvec_minmax, | |
541 | .extra1 = &neg_one, | |
542 | .extra2 = &one, | |
543 | }, | |
34f5a398 | 544 | #endif |
9745512c AV |
545 | #ifdef CONFIG_LATENCYTOP |
546 | { | |
547 | .procname = "latencytop", | |
548 | .data = &latencytop_enabled, | |
549 | .maxlen = sizeof(int), | |
550 | .mode = 0644, | |
cb251765 | 551 | .proc_handler = sysctl_latencytop, |
9745512c AV |
552 | }, |
553 | #endif | |
1da177e4 LT |
554 | #ifdef CONFIG_BLK_DEV_INITRD |
555 | { | |
1da177e4 LT |
556 | .procname = "real-root-dev", |
557 | .data = &real_root_dev, | |
558 | .maxlen = sizeof(int), | |
559 | .mode = 0644, | |
6d456111 | 560 | .proc_handler = proc_dointvec, |
1da177e4 LT |
561 | }, |
562 | #endif | |
45807a1d | 563 | { |
45807a1d IM |
564 | .procname = "print-fatal-signals", |
565 | .data = &print_fatal_signals, | |
566 | .maxlen = sizeof(int), | |
567 | .mode = 0644, | |
6d456111 | 568 | .proc_handler = proc_dointvec, |
45807a1d | 569 | }, |
72c57ed5 | 570 | #ifdef CONFIG_SPARC |
1da177e4 | 571 | { |
1da177e4 LT |
572 | .procname = "reboot-cmd", |
573 | .data = reboot_command, | |
574 | .maxlen = 256, | |
575 | .mode = 0644, | |
6d456111 | 576 | .proc_handler = proc_dostring, |
1da177e4 LT |
577 | }, |
578 | { | |
1da177e4 LT |
579 | .procname = "stop-a", |
580 | .data = &stop_a_enabled, | |
581 | .maxlen = sizeof (int), | |
582 | .mode = 0644, | |
6d456111 | 583 | .proc_handler = proc_dointvec, |
1da177e4 LT |
584 | }, |
585 | { | |
1da177e4 LT |
586 | .procname = "scons-poweroff", |
587 | .data = &scons_pwroff, | |
588 | .maxlen = sizeof (int), | |
589 | .mode = 0644, | |
6d456111 | 590 | .proc_handler = proc_dointvec, |
1da177e4 LT |
591 | }, |
592 | #endif | |
0871420f DM |
593 | #ifdef CONFIG_SPARC64 |
594 | { | |
0871420f DM |
595 | .procname = "tsb-ratio", |
596 | .data = &sysctl_tsb_ratio, | |
597 | .maxlen = sizeof (int), | |
598 | .mode = 0644, | |
6d456111 | 599 | .proc_handler = proc_dointvec, |
0871420f DM |
600 | }, |
601 | #endif | |
1da177e4 LT |
602 | #ifdef __hppa__ |
603 | { | |
1da177e4 LT |
604 | .procname = "soft-power", |
605 | .data = &pwrsw_enabled, | |
606 | .maxlen = sizeof (int), | |
607 | .mode = 0644, | |
6d456111 | 608 | .proc_handler = proc_dointvec, |
1da177e4 | 609 | }, |
bf14e3b9 VG |
610 | #endif |
611 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 612 | { |
1da177e4 LT |
613 | .procname = "unaligned-trap", |
614 | .data = &unaligned_enabled, | |
615 | .maxlen = sizeof (int), | |
616 | .mode = 0644, | |
6d456111 | 617 | .proc_handler = proc_dointvec, |
1da177e4 LT |
618 | }, |
619 | #endif | |
620 | { | |
1da177e4 LT |
621 | .procname = "ctrl-alt-del", |
622 | .data = &C_A_D, | |
623 | .maxlen = sizeof(int), | |
624 | .mode = 0644, | |
6d456111 | 625 | .proc_handler = proc_dointvec, |
1da177e4 | 626 | }, |
606576ce | 627 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 628 | { |
b0fc494f SR |
629 | .procname = "ftrace_enabled", |
630 | .data = &ftrace_enabled, | |
631 | .maxlen = sizeof(int), | |
632 | .mode = 0644, | |
6d456111 | 633 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
634 | }, |
635 | #endif | |
f38f1d2a SR |
636 | #ifdef CONFIG_STACK_TRACER |
637 | { | |
f38f1d2a SR |
638 | .procname = "stack_tracer_enabled", |
639 | .data = &stack_tracer_enabled, | |
640 | .maxlen = sizeof(int), | |
641 | .mode = 0644, | |
6d456111 | 642 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
643 | }, |
644 | #endif | |
944ac425 SR |
645 | #ifdef CONFIG_TRACING |
646 | { | |
3299b4dd | 647 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
648 | .data = &ftrace_dump_on_oops, |
649 | .maxlen = sizeof(int), | |
650 | .mode = 0644, | |
6d456111 | 651 | .proc_handler = proc_dointvec, |
944ac425 | 652 | }, |
de7edd31 SRRH |
653 | { |
654 | .procname = "traceoff_on_warning", | |
655 | .data = &__disable_trace_on_warning, | |
656 | .maxlen = sizeof(__disable_trace_on_warning), | |
657 | .mode = 0644, | |
658 | .proc_handler = proc_dointvec, | |
659 | }, | |
0daa2302 SRRH |
660 | { |
661 | .procname = "tracepoint_printk", | |
662 | .data = &tracepoint_printk, | |
663 | .maxlen = sizeof(tracepoint_printk), | |
664 | .mode = 0644, | |
42391745 | 665 | .proc_handler = tracepoint_printk_sysctl, |
0daa2302 | 666 | }, |
944ac425 | 667 | #endif |
2965faa5 | 668 | #ifdef CONFIG_KEXEC_CORE |
7984754b KC |
669 | { |
670 | .procname = "kexec_load_disabled", | |
671 | .data = &kexec_load_disabled, | |
672 | .maxlen = sizeof(int), | |
673 | .mode = 0644, | |
674 | /* only handle a transition from default "0" to "1" */ | |
675 | .proc_handler = proc_dointvec_minmax, | |
676 | .extra1 = &one, | |
677 | .extra2 = &one, | |
678 | }, | |
679 | #endif | |
a1ef5adb | 680 | #ifdef CONFIG_MODULES |
1da177e4 | 681 | { |
1da177e4 LT |
682 | .procname = "modprobe", |
683 | .data = &modprobe_path, | |
684 | .maxlen = KMOD_PATH_LEN, | |
685 | .mode = 0644, | |
6d456111 | 686 | .proc_handler = proc_dostring, |
1da177e4 | 687 | }, |
3d43321b | 688 | { |
3d43321b KC |
689 | .procname = "modules_disabled", |
690 | .data = &modules_disabled, | |
691 | .maxlen = sizeof(int), | |
692 | .mode = 0644, | |
693 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 694 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
695 | .extra1 = &one, |
696 | .extra2 = &one, | |
697 | }, | |
1da177e4 | 698 | #endif |
86d56134 | 699 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 700 | { |
1da177e4 | 701 | .procname = "hotplug", |
312c004d KS |
702 | .data = &uevent_helper, |
703 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 704 | .mode = 0644, |
6d456111 | 705 | .proc_handler = proc_dostring, |
1da177e4 | 706 | }, |
86d56134 | 707 | #endif |
1da177e4 LT |
708 | #ifdef CONFIG_CHR_DEV_SG |
709 | { | |
1da177e4 LT |
710 | .procname = "sg-big-buff", |
711 | .data = &sg_big_buff, | |
712 | .maxlen = sizeof (int), | |
713 | .mode = 0444, | |
6d456111 | 714 | .proc_handler = proc_dointvec, |
1da177e4 LT |
715 | }, |
716 | #endif | |
717 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
718 | { | |
1da177e4 LT |
719 | .procname = "acct", |
720 | .data = &acct_parm, | |
721 | .maxlen = 3*sizeof(int), | |
722 | .mode = 0644, | |
6d456111 | 723 | .proc_handler = proc_dointvec, |
1da177e4 LT |
724 | }, |
725 | #endif | |
1da177e4 LT |
726 | #ifdef CONFIG_MAGIC_SYSRQ |
727 | { | |
1da177e4 | 728 | .procname = "sysrq", |
5d6f647f | 729 | .data = &__sysrq_enabled, |
1da177e4 LT |
730 | .maxlen = sizeof (int), |
731 | .mode = 0644, | |
97f5f0cd | 732 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
733 | }, |
734 | #endif | |
d6f8ff73 | 735 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 736 | { |
1da177e4 | 737 | .procname = "cad_pid", |
9ec52099 | 738 | .data = NULL, |
1da177e4 LT |
739 | .maxlen = sizeof (int), |
740 | .mode = 0600, | |
6d456111 | 741 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 742 | }, |
d6f8ff73 | 743 | #endif |
1da177e4 | 744 | { |
1da177e4 | 745 | .procname = "threads-max", |
16db3d3f | 746 | .data = NULL, |
1da177e4 LT |
747 | .maxlen = sizeof(int), |
748 | .mode = 0644, | |
16db3d3f | 749 | .proc_handler = sysctl_max_threads, |
1da177e4 LT |
750 | }, |
751 | { | |
1da177e4 LT |
752 | .procname = "random", |
753 | .mode = 0555, | |
754 | .child = random_table, | |
755 | }, | |
17f60a7d EP |
756 | { |
757 | .procname = "usermodehelper", | |
758 | .mode = 0555, | |
759 | .child = usermodehelper_table, | |
760 | }, | |
1da177e4 | 761 | { |
1da177e4 LT |
762 | .procname = "overflowuid", |
763 | .data = &overflowuid, | |
764 | .maxlen = sizeof(int), | |
765 | .mode = 0644, | |
6d456111 | 766 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
767 | .extra1 = &minolduid, |
768 | .extra2 = &maxolduid, | |
769 | }, | |
770 | { | |
1da177e4 LT |
771 | .procname = "overflowgid", |
772 | .data = &overflowgid, | |
773 | .maxlen = sizeof(int), | |
774 | .mode = 0644, | |
6d456111 | 775 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
776 | .extra1 = &minolduid, |
777 | .extra2 = &maxolduid, | |
778 | }, | |
347a8dc3 | 779 | #ifdef CONFIG_S390 |
1da177e4 LT |
780 | #ifdef CONFIG_MATHEMU |
781 | { | |
1da177e4 LT |
782 | .procname = "ieee_emulation_warnings", |
783 | .data = &sysctl_ieee_emulation_warnings, | |
784 | .maxlen = sizeof(int), | |
785 | .mode = 0644, | |
6d456111 | 786 | .proc_handler = proc_dointvec, |
1da177e4 | 787 | }, |
1da177e4 LT |
788 | #endif |
789 | { | |
1da177e4 | 790 | .procname = "userprocess_debug", |
ab3c68ee | 791 | .data = &show_unhandled_signals, |
1da177e4 LT |
792 | .maxlen = sizeof(int), |
793 | .mode = 0644, | |
6d456111 | 794 | .proc_handler = proc_dointvec, |
1da177e4 LT |
795 | }, |
796 | #endif | |
797 | { | |
1da177e4 LT |
798 | .procname = "pid_max", |
799 | .data = &pid_max, | |
800 | .maxlen = sizeof (int), | |
801 | .mode = 0644, | |
6d456111 | 802 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
803 | .extra1 = &pid_max_min, |
804 | .extra2 = &pid_max_max, | |
805 | }, | |
806 | { | |
1da177e4 LT |
807 | .procname = "panic_on_oops", |
808 | .data = &panic_on_oops, | |
809 | .maxlen = sizeof(int), | |
810 | .mode = 0644, | |
6d456111 | 811 | .proc_handler = proc_dointvec, |
1da177e4 | 812 | }, |
7ef3d2fd JP |
813 | #if defined CONFIG_PRINTK |
814 | { | |
7ef3d2fd JP |
815 | .procname = "printk", |
816 | .data = &console_loglevel, | |
817 | .maxlen = 4*sizeof(int), | |
818 | .mode = 0644, | |
6d456111 | 819 | .proc_handler = proc_dointvec, |
7ef3d2fd | 820 | }, |
1da177e4 | 821 | { |
1da177e4 | 822 | .procname = "printk_ratelimit", |
717115e1 | 823 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
824 | .maxlen = sizeof(int), |
825 | .mode = 0644, | |
6d456111 | 826 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
827 | }, |
828 | { | |
1da177e4 | 829 | .procname = "printk_ratelimit_burst", |
717115e1 | 830 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
831 | .maxlen = sizeof(int), |
832 | .mode = 0644, | |
6d456111 | 833 | .proc_handler = proc_dointvec, |
1da177e4 | 834 | }, |
af91322e | 835 | { |
af91322e DY |
836 | .procname = "printk_delay", |
837 | .data = &printk_delay_msec, | |
838 | .maxlen = sizeof(int), | |
839 | .mode = 0644, | |
6d456111 | 840 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
841 | .extra1 = &zero, |
842 | .extra2 = &ten_thousand, | |
843 | }, | |
750afe7b BP |
844 | { |
845 | .procname = "printk_devkmsg", | |
846 | .data = devkmsg_log_str, | |
847 | .maxlen = DEVKMSG_STR_MAX_SIZE, | |
848 | .mode = 0644, | |
849 | .proc_handler = devkmsg_sysctl_set_loglvl, | |
850 | }, | |
eaf06b24 DR |
851 | { |
852 | .procname = "dmesg_restrict", | |
853 | .data = &dmesg_restrict, | |
854 | .maxlen = sizeof(int), | |
855 | .mode = 0644, | |
620f6e8e | 856 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
857 | .extra1 = &zero, |
858 | .extra2 = &one, | |
859 | }, | |
455cd5ab DR |
860 | { |
861 | .procname = "kptr_restrict", | |
862 | .data = &kptr_restrict, | |
863 | .maxlen = sizeof(int), | |
864 | .mode = 0644, | |
620f6e8e | 865 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
866 | .extra1 = &zero, |
867 | .extra2 = &two, | |
868 | }, | |
df6e61d4 | 869 | #endif |
1da177e4 | 870 | { |
1da177e4 LT |
871 | .procname = "ngroups_max", |
872 | .data = &ngroups_max, | |
873 | .maxlen = sizeof (int), | |
874 | .mode = 0444, | |
6d456111 | 875 | .proc_handler = proc_dointvec, |
1da177e4 | 876 | }, |
73efc039 DB |
877 | { |
878 | .procname = "cap_last_cap", | |
879 | .data = (void *)&cap_last_cap, | |
880 | .maxlen = sizeof(int), | |
881 | .mode = 0444, | |
882 | .proc_handler = proc_dointvec, | |
883 | }, | |
58687acb | 884 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 885 | { |
58687acb | 886 | .procname = "watchdog", |
7feeb9cd TG |
887 | .data = &watchdog_user_enabled, |
888 | .maxlen = sizeof(int), | |
889 | .mode = 0644, | |
195daf66 | 890 | .proc_handler = proc_watchdog, |
586692a5 MSB |
891 | .extra1 = &zero, |
892 | .extra2 = &one, | |
58687acb DZ |
893 | }, |
894 | { | |
895 | .procname = "watchdog_thresh", | |
586692a5 | 896 | .data = &watchdog_thresh, |
58687acb DZ |
897 | .maxlen = sizeof(int), |
898 | .mode = 0644, | |
195daf66 | 899 | .proc_handler = proc_watchdog_thresh, |
a6572f84 | 900 | .extra1 = &zero, |
58687acb | 901 | .extra2 = &sixty, |
504d7cf1 | 902 | }, |
195daf66 UO |
903 | { |
904 | .procname = "nmi_watchdog", | |
7feeb9cd TG |
905 | .data = &nmi_watchdog_user_enabled, |
906 | .maxlen = sizeof(int), | |
51d4052b | 907 | .mode = NMI_WATCHDOG_SYSCTL_PERM, |
195daf66 UO |
908 | .proc_handler = proc_nmi_watchdog, |
909 | .extra1 = &zero, | |
195daf66 | 910 | .extra2 = &one, |
195daf66 | 911 | }, |
05a4a952 NP |
912 | { |
913 | .procname = "watchdog_cpumask", | |
914 | .data = &watchdog_cpumask_bits, | |
915 | .maxlen = NR_CPUS, | |
916 | .mode = 0644, | |
917 | .proc_handler = proc_watchdog_cpumask, | |
918 | }, | |
919 | #ifdef CONFIG_SOFTLOCKUP_DETECTOR | |
195daf66 UO |
920 | { |
921 | .procname = "soft_watchdog", | |
7feeb9cd TG |
922 | .data = &soft_watchdog_user_enabled, |
923 | .maxlen = sizeof(int), | |
924 | .mode = 0644, | |
195daf66 UO |
925 | .proc_handler = proc_soft_watchdog, |
926 | .extra1 = &zero, | |
927 | .extra2 = &one, | |
928 | }, | |
2508ce18 DZ |
929 | { |
930 | .procname = "softlockup_panic", | |
931 | .data = &softlockup_panic, | |
932 | .maxlen = sizeof(int), | |
933 | .mode = 0644, | |
934 | .proc_handler = proc_dointvec_minmax, | |
935 | .extra1 = &zero, | |
936 | .extra2 = &one, | |
937 | }, | |
05a4a952 | 938 | #ifdef CONFIG_SMP |
ac1f5912 | 939 | { |
05a4a952 NP |
940 | .procname = "softlockup_all_cpu_backtrace", |
941 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
ac1f5912 DZ |
942 | .maxlen = sizeof(int), |
943 | .mode = 0644, | |
944 | .proc_handler = proc_dointvec_minmax, | |
945 | .extra1 = &zero, | |
946 | .extra2 = &one, | |
947 | }, | |
05a4a952 | 948 | #endif /* CONFIG_SMP */ |
ac1f5912 | 949 | #endif |
05a4a952 | 950 | #ifdef CONFIG_HARDLOCKUP_DETECTOR |
ed235875 | 951 | { |
05a4a952 NP |
952 | .procname = "hardlockup_panic", |
953 | .data = &hardlockup_panic, | |
ed235875 AT |
954 | .maxlen = sizeof(int), |
955 | .mode = 0644, | |
956 | .proc_handler = proc_dointvec_minmax, | |
957 | .extra1 = &zero, | |
958 | .extra2 = &one, | |
959 | }, | |
05a4a952 | 960 | #ifdef CONFIG_SMP |
55537871 JK |
961 | { |
962 | .procname = "hardlockup_all_cpu_backtrace", | |
963 | .data = &sysctl_hardlockup_all_cpu_backtrace, | |
964 | .maxlen = sizeof(int), | |
965 | .mode = 0644, | |
966 | .proc_handler = proc_dointvec_minmax, | |
967 | .extra1 = &zero, | |
968 | .extra2 = &one, | |
969 | }, | |
ed235875 | 970 | #endif /* CONFIG_SMP */ |
5dc30558 | 971 | #endif |
05a4a952 NP |
972 | #endif |
973 | ||
5dc30558 DZ |
974 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) |
975 | { | |
976 | .procname = "unknown_nmi_panic", | |
977 | .data = &unknown_nmi_panic, | |
978 | .maxlen = sizeof (int), | |
979 | .mode = 0644, | |
980 | .proc_handler = proc_dointvec, | |
981 | }, | |
504d7cf1 | 982 | #endif |
1da177e4 | 983 | #if defined(CONFIG_X86) |
8da5adda | 984 | { |
8da5adda DZ |
985 | .procname = "panic_on_unrecovered_nmi", |
986 | .data = &panic_on_unrecovered_nmi, | |
987 | .maxlen = sizeof(int), | |
988 | .mode = 0644, | |
6d456111 | 989 | .proc_handler = proc_dointvec, |
8da5adda | 990 | }, |
5211a242 | 991 | { |
5211a242 KG |
992 | .procname = "panic_on_io_nmi", |
993 | .data = &panic_on_io_nmi, | |
994 | .maxlen = sizeof(int), | |
995 | .mode = 0644, | |
6d456111 | 996 | .proc_handler = proc_dointvec, |
5211a242 | 997 | }, |
55af7796 MH |
998 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
999 | { | |
1000 | .procname = "panic_on_stackoverflow", | |
1001 | .data = &sysctl_panic_on_stackoverflow, | |
1002 | .maxlen = sizeof(int), | |
1003 | .mode = 0644, | |
1004 | .proc_handler = proc_dointvec, | |
1005 | }, | |
1006 | #endif | |
1da177e4 | 1007 | { |
1da177e4 LT |
1008 | .procname = "bootloader_type", |
1009 | .data = &bootloader_type, | |
1010 | .maxlen = sizeof (int), | |
1011 | .mode = 0444, | |
6d456111 | 1012 | .proc_handler = proc_dointvec, |
1da177e4 | 1013 | }, |
5031296c | 1014 | { |
5031296c PA |
1015 | .procname = "bootloader_version", |
1016 | .data = &bootloader_version, | |
1017 | .maxlen = sizeof (int), | |
1018 | .mode = 0444, | |
6d456111 | 1019 | .proc_handler = proc_dointvec, |
5031296c | 1020 | }, |
6e7c4025 | 1021 | { |
6e7c4025 IM |
1022 | .procname = "io_delay_type", |
1023 | .data = &io_delay_type, | |
1024 | .maxlen = sizeof(int), | |
1025 | .mode = 0644, | |
6d456111 | 1026 | .proc_handler = proc_dointvec, |
6e7c4025 | 1027 | }, |
1da177e4 | 1028 | #endif |
7a9166e3 | 1029 | #if defined(CONFIG_MMU) |
1da177e4 | 1030 | { |
1da177e4 LT |
1031 | .procname = "randomize_va_space", |
1032 | .data = &randomize_va_space, | |
1033 | .maxlen = sizeof(int), | |
1034 | .mode = 0644, | |
6d456111 | 1035 | .proc_handler = proc_dointvec, |
1da177e4 | 1036 | }, |
7a9166e3 | 1037 | #endif |
0152fb37 | 1038 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 1039 | { |
951f22d5 MS |
1040 | .procname = "spin_retry", |
1041 | .data = &spin_retry, | |
1042 | .maxlen = sizeof (int), | |
1043 | .mode = 0644, | |
6d456111 | 1044 | .proc_handler = proc_dointvec, |
951f22d5 | 1045 | }, |
c255d844 | 1046 | #endif |
673d5b43 | 1047 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 1048 | { |
c255d844 | 1049 | .procname = "acpi_video_flags", |
77afcf78 | 1050 | .data = &acpi_realmode_flags, |
c255d844 PM |
1051 | .maxlen = sizeof (unsigned long), |
1052 | .mode = 0644, | |
6d456111 | 1053 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 1054 | }, |
d2b176ed | 1055 | #endif |
b6fca725 | 1056 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 1057 | { |
d2b176ed JS |
1058 | .procname = "ignore-unaligned-usertrap", |
1059 | .data = &no_unaligned_warning, | |
1060 | .maxlen = sizeof (int), | |
1061 | .mode = 0644, | |
6d456111 | 1062 | .proc_handler = proc_dointvec, |
d2b176ed | 1063 | }, |
b6fca725 VG |
1064 | #endif |
1065 | #ifdef CONFIG_IA64 | |
88fc241f | 1066 | { |
88fc241f DC |
1067 | .procname = "unaligned-dump-stack", |
1068 | .data = &unaligned_dump_stack, | |
1069 | .maxlen = sizeof (int), | |
1070 | .mode = 0644, | |
6d456111 | 1071 | .proc_handler = proc_dointvec, |
88fc241f | 1072 | }, |
bebfa101 | 1073 | #endif |
e162b39a MSB |
1074 | #ifdef CONFIG_DETECT_HUNG_TASK |
1075 | { | |
e162b39a MSB |
1076 | .procname = "hung_task_panic", |
1077 | .data = &sysctl_hung_task_panic, | |
1078 | .maxlen = sizeof(int), | |
1079 | .mode = 0644, | |
6d456111 | 1080 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
1081 | .extra1 = &zero, |
1082 | .extra2 = &one, | |
1083 | }, | |
82a1fcb9 | 1084 | { |
82a1fcb9 IM |
1085 | .procname = "hung_task_check_count", |
1086 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 1087 | .maxlen = sizeof(int), |
82a1fcb9 | 1088 | .mode = 0644, |
cd64647f LZ |
1089 | .proc_handler = proc_dointvec_minmax, |
1090 | .extra1 = &zero, | |
82a1fcb9 IM |
1091 | }, |
1092 | { | |
82a1fcb9 IM |
1093 | .procname = "hung_task_timeout_secs", |
1094 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1095 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1096 | .mode = 0644, |
6d456111 | 1097 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1098 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
1099 | }, |
1100 | { | |
82a1fcb9 IM |
1101 | .procname = "hung_task_warnings", |
1102 | .data = &sysctl_hung_task_warnings, | |
270750db | 1103 | .maxlen = sizeof(int), |
82a1fcb9 | 1104 | .mode = 0644, |
270750db AT |
1105 | .proc_handler = proc_dointvec_minmax, |
1106 | .extra1 = &neg_one, | |
82a1fcb9 | 1107 | }, |
c4f3b63f | 1108 | #endif |
23f78d4a IM |
1109 | #ifdef CONFIG_RT_MUTEXES |
1110 | { | |
23f78d4a IM |
1111 | .procname = "max_lock_depth", |
1112 | .data = &max_lock_depth, | |
1113 | .maxlen = sizeof(int), | |
1114 | .mode = 0644, | |
6d456111 | 1115 | .proc_handler = proc_dointvec, |
23f78d4a | 1116 | }, |
5096add8 | 1117 | #endif |
10a0a8d4 | 1118 | { |
10a0a8d4 JF |
1119 | .procname = "poweroff_cmd", |
1120 | .data = &poweroff_cmd, | |
1121 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1122 | .mode = 0644, | |
6d456111 | 1123 | .proc_handler = proc_dostring, |
10a0a8d4 | 1124 | }, |
0b77f5bf DH |
1125 | #ifdef CONFIG_KEYS |
1126 | { | |
0b77f5bf DH |
1127 | .procname = "keys", |
1128 | .mode = 0555, | |
1129 | .child = key_sysctls, | |
1130 | }, | |
1131 | #endif | |
cdd6c482 | 1132 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1133 | /* |
1134 | * User-space scripts rely on the existence of this file | |
1135 | * as a feature check for perf_events being enabled. | |
1136 | * | |
1137 | * So it's an ABI, do not remove! | |
1138 | */ | |
1ccd1549 | 1139 | { |
cdd6c482 IM |
1140 | .procname = "perf_event_paranoid", |
1141 | .data = &sysctl_perf_event_paranoid, | |
1142 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1143 | .mode = 0644, |
6d456111 | 1144 | .proc_handler = proc_dointvec, |
1ccd1549 | 1145 | }, |
c5078f78 | 1146 | { |
cdd6c482 IM |
1147 | .procname = "perf_event_mlock_kb", |
1148 | .data = &sysctl_perf_event_mlock, | |
1149 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1150 | .mode = 0644, |
6d456111 | 1151 | .proc_handler = proc_dointvec, |
c5078f78 | 1152 | }, |
a78ac325 | 1153 | { |
cdd6c482 IM |
1154 | .procname = "perf_event_max_sample_rate", |
1155 | .data = &sysctl_perf_event_sample_rate, | |
1156 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1157 | .mode = 0644, |
163ec435 | 1158 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1159 | .extra1 = &one, |
a78ac325 | 1160 | }, |
14c63f17 DH |
1161 | { |
1162 | .procname = "perf_cpu_time_max_percent", | |
1163 | .data = &sysctl_perf_cpu_time_max_percent, | |
1164 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1165 | .mode = 0644, | |
1166 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1167 | .extra1 = &zero, | |
1168 | .extra2 = &one_hundred, | |
1169 | }, | |
c5dfd78e ACM |
1170 | { |
1171 | .procname = "perf_event_max_stack", | |
a831100a | 1172 | .data = &sysctl_perf_event_max_stack, |
c5dfd78e ACM |
1173 | .maxlen = sizeof(sysctl_perf_event_max_stack), |
1174 | .mode = 0644, | |
1175 | .proc_handler = perf_event_max_stack_handler, | |
1176 | .extra1 = &zero, | |
1177 | .extra2 = &six_hundred_forty_kb, | |
1178 | }, | |
c85b0334 ACM |
1179 | { |
1180 | .procname = "perf_event_max_contexts_per_stack", | |
1181 | .data = &sysctl_perf_event_max_contexts_per_stack, | |
1182 | .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack), | |
1183 | .mode = 0644, | |
1184 | .proc_handler = perf_event_max_stack_handler, | |
1185 | .extra1 = &zero, | |
1186 | .extra2 = &one_thousand, | |
1187 | }, | |
cb684b5b | 1188 | #endif |
9e3961a0 PB |
1189 | { |
1190 | .procname = "panic_on_warn", | |
1191 | .data = &panic_on_warn, | |
1192 | .maxlen = sizeof(int), | |
1193 | .mode = 0644, | |
1194 | .proc_handler = proc_dointvec_minmax, | |
1195 | .extra1 = &zero, | |
1196 | .extra2 = &one, | |
1197 | }, | |
bc7a34b8 TG |
1198 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) |
1199 | { | |
1200 | .procname = "timer_migration", | |
1201 | .data = &sysctl_timer_migration, | |
1202 | .maxlen = sizeof(unsigned int), | |
1203 | .mode = 0644, | |
1204 | .proc_handler = timer_migration_handler, | |
b94bf594 MJ |
1205 | .extra1 = &zero, |
1206 | .extra2 = &one, | |
bc7a34b8 | 1207 | }, |
1be7f75d AS |
1208 | #endif |
1209 | #ifdef CONFIG_BPF_SYSCALL | |
1210 | { | |
1211 | .procname = "unprivileged_bpf_disabled", | |
1212 | .data = &sysctl_unprivileged_bpf_disabled, | |
1213 | .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), | |
1214 | .mode = 0644, | |
1215 | /* only handle a transition from default "0" to "1" */ | |
1216 | .proc_handler = proc_dointvec_minmax, | |
1217 | .extra1 = &one, | |
1218 | .extra2 = &one, | |
1219 | }, | |
088e9d25 DBO |
1220 | #endif |
1221 | #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) | |
1222 | { | |
1223 | .procname = "panic_on_rcu_stall", | |
1224 | .data = &sysctl_panic_on_rcu_stall, | |
1225 | .maxlen = sizeof(sysctl_panic_on_rcu_stall), | |
1226 | .mode = 0644, | |
1227 | .proc_handler = proc_dointvec_minmax, | |
1228 | .extra1 = &zero, | |
1229 | .extra2 = &one, | |
1230 | }, | |
bc7a34b8 | 1231 | #endif |
6fce56ec | 1232 | { } |
1da177e4 LT |
1233 | }; |
1234 | ||
d8217f07 | 1235 | static struct ctl_table vm_table[] = { |
1da177e4 | 1236 | { |
1da177e4 LT |
1237 | .procname = "overcommit_memory", |
1238 | .data = &sysctl_overcommit_memory, | |
1239 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1240 | .mode = 0644, | |
cb16e95f PH |
1241 | .proc_handler = proc_dointvec_minmax, |
1242 | .extra1 = &zero, | |
1243 | .extra2 = &two, | |
1da177e4 | 1244 | }, |
fadd8fbd | 1245 | { |
fadd8fbd KH |
1246 | .procname = "panic_on_oom", |
1247 | .data = &sysctl_panic_on_oom, | |
1248 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1249 | .mode = 0644, | |
cb16e95f PH |
1250 | .proc_handler = proc_dointvec_minmax, |
1251 | .extra1 = &zero, | |
1252 | .extra2 = &two, | |
fadd8fbd | 1253 | }, |
fe071d7e | 1254 | { |
fe071d7e DR |
1255 | .procname = "oom_kill_allocating_task", |
1256 | .data = &sysctl_oom_kill_allocating_task, | |
1257 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1258 | .mode = 0644, | |
6d456111 | 1259 | .proc_handler = proc_dointvec, |
fe071d7e | 1260 | }, |
fef1bdd6 | 1261 | { |
fef1bdd6 DR |
1262 | .procname = "oom_dump_tasks", |
1263 | .data = &sysctl_oom_dump_tasks, | |
1264 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1265 | .mode = 0644, | |
6d456111 | 1266 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1267 | }, |
1da177e4 | 1268 | { |
1da177e4 LT |
1269 | .procname = "overcommit_ratio", |
1270 | .data = &sysctl_overcommit_ratio, | |
1271 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1272 | .mode = 0644, | |
49f0ce5f JM |
1273 | .proc_handler = overcommit_ratio_handler, |
1274 | }, | |
1275 | { | |
1276 | .procname = "overcommit_kbytes", | |
1277 | .data = &sysctl_overcommit_kbytes, | |
1278 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1279 | .mode = 0644, | |
1280 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1281 | }, |
1282 | { | |
1da177e4 LT |
1283 | .procname = "page-cluster", |
1284 | .data = &page_cluster, | |
1285 | .maxlen = sizeof(int), | |
1286 | .mode = 0644, | |
cb16e95f PH |
1287 | .proc_handler = proc_dointvec_minmax, |
1288 | .extra1 = &zero, | |
1da177e4 LT |
1289 | }, |
1290 | { | |
1da177e4 LT |
1291 | .procname = "dirty_background_ratio", |
1292 | .data = &dirty_background_ratio, | |
1293 | .maxlen = sizeof(dirty_background_ratio), | |
1294 | .mode = 0644, | |
6d456111 | 1295 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1296 | .extra1 = &zero, |
1297 | .extra2 = &one_hundred, | |
1298 | }, | |
2da02997 | 1299 | { |
2da02997 DR |
1300 | .procname = "dirty_background_bytes", |
1301 | .data = &dirty_background_bytes, | |
1302 | .maxlen = sizeof(dirty_background_bytes), | |
1303 | .mode = 0644, | |
6d456111 | 1304 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1305 | .extra1 = &one_ul, |
2da02997 | 1306 | }, |
1da177e4 | 1307 | { |
1da177e4 LT |
1308 | .procname = "dirty_ratio", |
1309 | .data = &vm_dirty_ratio, | |
1310 | .maxlen = sizeof(vm_dirty_ratio), | |
1311 | .mode = 0644, | |
6d456111 | 1312 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1313 | .extra1 = &zero, |
1314 | .extra2 = &one_hundred, | |
1315 | }, | |
2da02997 | 1316 | { |
2da02997 DR |
1317 | .procname = "dirty_bytes", |
1318 | .data = &vm_dirty_bytes, | |
1319 | .maxlen = sizeof(vm_dirty_bytes), | |
1320 | .mode = 0644, | |
6d456111 | 1321 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1322 | .extra1 = &dirty_bytes_min, |
2da02997 | 1323 | }, |
1da177e4 | 1324 | { |
1da177e4 | 1325 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1326 | .data = &dirty_writeback_interval, |
1327 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1328 | .mode = 0644, |
6d456111 | 1329 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1330 | }, |
1331 | { | |
1da177e4 | 1332 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1333 | .data = &dirty_expire_interval, |
1334 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1335 | .mode = 0644, |
cb16e95f PH |
1336 | .proc_handler = proc_dointvec_minmax, |
1337 | .extra1 = &zero, | |
1da177e4 | 1338 | }, |
1efff914 TT |
1339 | { |
1340 | .procname = "dirtytime_expire_seconds", | |
1341 | .data = &dirtytime_expire_interval, | |
1342 | .maxlen = sizeof(dirty_expire_interval), | |
1343 | .mode = 0644, | |
1344 | .proc_handler = dirtytime_interval_handler, | |
1345 | .extra1 = &zero, | |
1346 | }, | |
1da177e4 | 1347 | { |
1da177e4 LT |
1348 | .procname = "swappiness", |
1349 | .data = &vm_swappiness, | |
1350 | .maxlen = sizeof(vm_swappiness), | |
1351 | .mode = 0644, | |
6d456111 | 1352 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1353 | .extra1 = &zero, |
1354 | .extra2 = &one_hundred, | |
1355 | }, | |
1356 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1357 | { |
1da177e4 | 1358 | .procname = "nr_hugepages", |
e5ff2159 | 1359 | .data = NULL, |
1da177e4 LT |
1360 | .maxlen = sizeof(unsigned long), |
1361 | .mode = 0644, | |
6d456111 | 1362 | .proc_handler = hugetlb_sysctl_handler, |
06808b08 LS |
1363 | }, |
1364 | #ifdef CONFIG_NUMA | |
1365 | { | |
1366 | .procname = "nr_hugepages_mempolicy", | |
1367 | .data = NULL, | |
1368 | .maxlen = sizeof(unsigned long), | |
1369 | .mode = 0644, | |
1370 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
06808b08 | 1371 | }, |
4518085e KW |
1372 | { |
1373 | .procname = "numa_stat", | |
1374 | .data = &sysctl_vm_numa_stat, | |
1375 | .maxlen = sizeof(int), | |
1376 | .mode = 0644, | |
1377 | .proc_handler = sysctl_vm_numa_stat_handler, | |
1378 | .extra1 = &zero, | |
1379 | .extra2 = &one, | |
1380 | }, | |
06808b08 | 1381 | #endif |
1da177e4 | 1382 | { |
1da177e4 LT |
1383 | .procname = "hugetlb_shm_group", |
1384 | .data = &sysctl_hugetlb_shm_group, | |
1385 | .maxlen = sizeof(gid_t), | |
1386 | .mode = 0644, | |
6d456111 | 1387 | .proc_handler = proc_dointvec, |
1da177e4 | 1388 | }, |
396faf03 | 1389 | { |
396faf03 MG |
1390 | .procname = "hugepages_treat_as_movable", |
1391 | .data = &hugepages_treat_as_movable, | |
1392 | .maxlen = sizeof(int), | |
1393 | .mode = 0644, | |
86cdb465 | 1394 | .proc_handler = proc_dointvec, |
396faf03 | 1395 | }, |
d1c3fb1f | 1396 | { |
d1c3fb1f | 1397 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1398 | .data = NULL, |
1399 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1400 | .mode = 0644, |
6d456111 | 1401 | .proc_handler = hugetlb_overcommit_handler, |
d1c3fb1f | 1402 | }, |
1da177e4 LT |
1403 | #endif |
1404 | { | |
1da177e4 LT |
1405 | .procname = "lowmem_reserve_ratio", |
1406 | .data = &sysctl_lowmem_reserve_ratio, | |
1407 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1408 | .mode = 0644, | |
6d456111 | 1409 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1410 | }, |
9d0243bc | 1411 | { |
9d0243bc AM |
1412 | .procname = "drop_caches", |
1413 | .data = &sysctl_drop_caches, | |
1414 | .maxlen = sizeof(int), | |
1415 | .mode = 0644, | |
1416 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1417 | .extra1 = &one, |
5509a5d2 | 1418 | .extra2 = &four, |
9d0243bc | 1419 | }, |
76ab0f53 MG |
1420 | #ifdef CONFIG_COMPACTION |
1421 | { | |
1422 | .procname = "compact_memory", | |
1423 | .data = &sysctl_compact_memory, | |
1424 | .maxlen = sizeof(int), | |
1425 | .mode = 0200, | |
1426 | .proc_handler = sysctl_compaction_handler, | |
1427 | }, | |
5e771905 MG |
1428 | { |
1429 | .procname = "extfrag_threshold", | |
1430 | .data = &sysctl_extfrag_threshold, | |
1431 | .maxlen = sizeof(int), | |
1432 | .mode = 0644, | |
1433 | .proc_handler = sysctl_extfrag_handler, | |
1434 | .extra1 = &min_extfrag_threshold, | |
1435 | .extra2 = &max_extfrag_threshold, | |
1436 | }, | |
5bbe3547 EM |
1437 | { |
1438 | .procname = "compact_unevictable_allowed", | |
1439 | .data = &sysctl_compact_unevictable_allowed, | |
1440 | .maxlen = sizeof(int), | |
1441 | .mode = 0644, | |
1442 | .proc_handler = proc_dointvec, | |
1443 | .extra1 = &zero, | |
1444 | .extra2 = &one, | |
1445 | }, | |
5e771905 | 1446 | |
76ab0f53 | 1447 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1448 | { |
1da177e4 LT |
1449 | .procname = "min_free_kbytes", |
1450 | .data = &min_free_kbytes, | |
1451 | .maxlen = sizeof(min_free_kbytes), | |
1452 | .mode = 0644, | |
6d456111 | 1453 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1454 | .extra1 = &zero, |
1455 | }, | |
795ae7a0 JW |
1456 | { |
1457 | .procname = "watermark_scale_factor", | |
1458 | .data = &watermark_scale_factor, | |
1459 | .maxlen = sizeof(watermark_scale_factor), | |
1460 | .mode = 0644, | |
1461 | .proc_handler = watermark_scale_factor_sysctl_handler, | |
1462 | .extra1 = &one, | |
1463 | .extra2 = &one_thousand, | |
1464 | }, | |
8ad4b1fb | 1465 | { |
8ad4b1fb RS |
1466 | .procname = "percpu_pagelist_fraction", |
1467 | .data = &percpu_pagelist_fraction, | |
1468 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1469 | .mode = 0644, | |
6d456111 | 1470 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1471 | .extra1 = &zero, |
8ad4b1fb | 1472 | }, |
1da177e4 LT |
1473 | #ifdef CONFIG_MMU |
1474 | { | |
1da177e4 LT |
1475 | .procname = "max_map_count", |
1476 | .data = &sysctl_max_map_count, | |
1477 | .maxlen = sizeof(sysctl_max_map_count), | |
1478 | .mode = 0644, | |
3e26120c | 1479 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1480 | .extra1 = &zero, |
1da177e4 | 1481 | }, |
dd8632a1 PM |
1482 | #else |
1483 | { | |
dd8632a1 PM |
1484 | .procname = "nr_trim_pages", |
1485 | .data = &sysctl_nr_trim_pages, | |
1486 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1487 | .mode = 0644, | |
6d456111 | 1488 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1489 | .extra1 = &zero, |
1490 | }, | |
1da177e4 LT |
1491 | #endif |
1492 | { | |
1da177e4 LT |
1493 | .procname = "laptop_mode", |
1494 | .data = &laptop_mode, | |
1495 | .maxlen = sizeof(laptop_mode), | |
1496 | .mode = 0644, | |
6d456111 | 1497 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1498 | }, |
1499 | { | |
1da177e4 LT |
1500 | .procname = "block_dump", |
1501 | .data = &block_dump, | |
1502 | .maxlen = sizeof(block_dump), | |
1503 | .mode = 0644, | |
6d456111 | 1504 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1505 | .extra1 = &zero, |
1506 | }, | |
1507 | { | |
1da177e4 LT |
1508 | .procname = "vfs_cache_pressure", |
1509 | .data = &sysctl_vfs_cache_pressure, | |
1510 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1511 | .mode = 0644, | |
6d456111 | 1512 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1513 | .extra1 = &zero, |
1514 | }, | |
1515 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1516 | { | |
1da177e4 LT |
1517 | .procname = "legacy_va_layout", |
1518 | .data = &sysctl_legacy_va_layout, | |
1519 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1520 | .mode = 0644, | |
6d456111 | 1521 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1522 | .extra1 = &zero, |
1523 | }, | |
1524 | #endif | |
1743660b CL |
1525 | #ifdef CONFIG_NUMA |
1526 | { | |
1743660b | 1527 | .procname = "zone_reclaim_mode", |
a5f5f91d MG |
1528 | .data = &node_reclaim_mode, |
1529 | .maxlen = sizeof(node_reclaim_mode), | |
1743660b | 1530 | .mode = 0644, |
6d456111 | 1531 | .proc_handler = proc_dointvec, |
c84db23c | 1532 | .extra1 = &zero, |
1743660b | 1533 | }, |
9614634f | 1534 | { |
9614634f CL |
1535 | .procname = "min_unmapped_ratio", |
1536 | .data = &sysctl_min_unmapped_ratio, | |
1537 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1538 | .mode = 0644, | |
6d456111 | 1539 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1540 | .extra1 = &zero, |
1541 | .extra2 = &one_hundred, | |
1542 | }, | |
0ff38490 | 1543 | { |
0ff38490 CL |
1544 | .procname = "min_slab_ratio", |
1545 | .data = &sysctl_min_slab_ratio, | |
1546 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1547 | .mode = 0644, | |
6d456111 | 1548 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1549 | .extra1 = &zero, |
1550 | .extra2 = &one_hundred, | |
1551 | }, | |
e6e5494c | 1552 | #endif |
77461ab3 CL |
1553 | #ifdef CONFIG_SMP |
1554 | { | |
77461ab3 CL |
1555 | .procname = "stat_interval", |
1556 | .data = &sysctl_stat_interval, | |
1557 | .maxlen = sizeof(sysctl_stat_interval), | |
1558 | .mode = 0644, | |
6d456111 | 1559 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 | 1560 | }, |
52b6f46b HD |
1561 | { |
1562 | .procname = "stat_refresh", | |
1563 | .data = NULL, | |
1564 | .maxlen = 0, | |
1565 | .mode = 0600, | |
1566 | .proc_handler = vmstat_refresh, | |
1567 | }, | |
77461ab3 | 1568 | #endif |
6e141546 | 1569 | #ifdef CONFIG_MMU |
ed032189 | 1570 | { |
ed032189 | 1571 | .procname = "mmap_min_addr", |
788084ab EP |
1572 | .data = &dac_mmap_min_addr, |
1573 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1574 | .mode = 0644, |
6d456111 | 1575 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1576 | }, |
6e141546 | 1577 | #endif |
f0c0b2b8 KH |
1578 | #ifdef CONFIG_NUMA |
1579 | { | |
f0c0b2b8 KH |
1580 | .procname = "numa_zonelist_order", |
1581 | .data = &numa_zonelist_order, | |
1582 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1583 | .mode = 0644, | |
6d456111 | 1584 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1585 | }, |
1586 | #endif | |
2b8232ce | 1587 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1588 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1589 | { |
e6e5494c | 1590 | .procname = "vdso_enabled", |
3d7ee969 AL |
1591 | #ifdef CONFIG_X86_32 |
1592 | .data = &vdso32_enabled, | |
1593 | .maxlen = sizeof(vdso32_enabled), | |
1594 | #else | |
e6e5494c IM |
1595 | .data = &vdso_enabled, |
1596 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1597 | #endif |
e6e5494c | 1598 | .mode = 0644, |
6d456111 | 1599 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1600 | .extra1 = &zero, |
1601 | }, | |
1da177e4 | 1602 | #endif |
195cf453 BG |
1603 | #ifdef CONFIG_HIGHMEM |
1604 | { | |
195cf453 BG |
1605 | .procname = "highmem_is_dirtyable", |
1606 | .data = &vm_highmem_is_dirtyable, | |
1607 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1608 | .mode = 0644, | |
6d456111 | 1609 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1610 | .extra1 = &zero, |
1611 | .extra2 = &one, | |
1612 | }, | |
1613 | #endif | |
6a46079c AK |
1614 | #ifdef CONFIG_MEMORY_FAILURE |
1615 | { | |
6a46079c AK |
1616 | .procname = "memory_failure_early_kill", |
1617 | .data = &sysctl_memory_failure_early_kill, | |
1618 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1619 | .mode = 0644, | |
6d456111 | 1620 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1621 | .extra1 = &zero, |
1622 | .extra2 = &one, | |
1623 | }, | |
1624 | { | |
6a46079c AK |
1625 | .procname = "memory_failure_recovery", |
1626 | .data = &sysctl_memory_failure_recovery, | |
1627 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1628 | .mode = 0644, | |
6d456111 | 1629 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1630 | .extra1 = &zero, |
1631 | .extra2 = &one, | |
1632 | }, | |
1633 | #endif | |
c9b1d098 AS |
1634 | { |
1635 | .procname = "user_reserve_kbytes", | |
1636 | .data = &sysctl_user_reserve_kbytes, | |
1637 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1638 | .mode = 0644, | |
1639 | .proc_handler = proc_doulongvec_minmax, | |
1640 | }, | |
4eeab4f5 AS |
1641 | { |
1642 | .procname = "admin_reserve_kbytes", | |
1643 | .data = &sysctl_admin_reserve_kbytes, | |
1644 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1645 | .mode = 0644, | |
1646 | .proc_handler = proc_doulongvec_minmax, | |
1647 | }, | |
d07e2259 DC |
1648 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS |
1649 | { | |
1650 | .procname = "mmap_rnd_bits", | |
1651 | .data = &mmap_rnd_bits, | |
1652 | .maxlen = sizeof(mmap_rnd_bits), | |
1653 | .mode = 0600, | |
1654 | .proc_handler = proc_dointvec_minmax, | |
1655 | .extra1 = (void *)&mmap_rnd_bits_min, | |
1656 | .extra2 = (void *)&mmap_rnd_bits_max, | |
1657 | }, | |
1658 | #endif | |
1659 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS | |
1660 | { | |
1661 | .procname = "mmap_rnd_compat_bits", | |
1662 | .data = &mmap_rnd_compat_bits, | |
1663 | .maxlen = sizeof(mmap_rnd_compat_bits), | |
1664 | .mode = 0600, | |
1665 | .proc_handler = proc_dointvec_minmax, | |
1666 | .extra1 = (void *)&mmap_rnd_compat_bits_min, | |
1667 | .extra2 = (void *)&mmap_rnd_compat_bits_max, | |
1668 | }, | |
1669 | #endif | |
6fce56ec | 1670 | { } |
1da177e4 LT |
1671 | }; |
1672 | ||
d8217f07 | 1673 | static struct ctl_table fs_table[] = { |
1da177e4 | 1674 | { |
1da177e4 LT |
1675 | .procname = "inode-nr", |
1676 | .data = &inodes_stat, | |
3942c07c | 1677 | .maxlen = 2*sizeof(long), |
1da177e4 | 1678 | .mode = 0444, |
cffbc8aa | 1679 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1680 | }, |
1681 | { | |
1da177e4 LT |
1682 | .procname = "inode-state", |
1683 | .data = &inodes_stat, | |
3942c07c | 1684 | .maxlen = 7*sizeof(long), |
1da177e4 | 1685 | .mode = 0444, |
cffbc8aa | 1686 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1687 | }, |
1688 | { | |
1da177e4 LT |
1689 | .procname = "file-nr", |
1690 | .data = &files_stat, | |
518de9b3 | 1691 | .maxlen = sizeof(files_stat), |
1da177e4 | 1692 | .mode = 0444, |
6d456111 | 1693 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1694 | }, |
1695 | { | |
1da177e4 LT |
1696 | .procname = "file-max", |
1697 | .data = &files_stat.max_files, | |
518de9b3 | 1698 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1699 | .mode = 0644, |
518de9b3 | 1700 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1701 | }, |
9cfe015a | 1702 | { |
9cfe015a ED |
1703 | .procname = "nr_open", |
1704 | .data = &sysctl_nr_open, | |
9b80a184 | 1705 | .maxlen = sizeof(unsigned int), |
9cfe015a | 1706 | .mode = 0644, |
6d456111 | 1707 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1708 | .extra1 = &sysctl_nr_open_min, |
1709 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1710 | }, |
1da177e4 | 1711 | { |
1da177e4 LT |
1712 | .procname = "dentry-state", |
1713 | .data = &dentry_stat, | |
3942c07c | 1714 | .maxlen = 6*sizeof(long), |
1da177e4 | 1715 | .mode = 0444, |
312d3ca8 | 1716 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1717 | }, |
1718 | { | |
1da177e4 LT |
1719 | .procname = "overflowuid", |
1720 | .data = &fs_overflowuid, | |
1721 | .maxlen = sizeof(int), | |
1722 | .mode = 0644, | |
6d456111 | 1723 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1724 | .extra1 = &minolduid, |
1725 | .extra2 = &maxolduid, | |
1726 | }, | |
1727 | { | |
1da177e4 LT |
1728 | .procname = "overflowgid", |
1729 | .data = &fs_overflowgid, | |
1730 | .maxlen = sizeof(int), | |
1731 | .mode = 0644, | |
6d456111 | 1732 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1733 | .extra1 = &minolduid, |
1734 | .extra2 = &maxolduid, | |
1735 | }, | |
bfcd17a6 | 1736 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1737 | { |
1da177e4 LT |
1738 | .procname = "leases-enable", |
1739 | .data = &leases_enable, | |
1740 | .maxlen = sizeof(int), | |
1741 | .mode = 0644, | |
6d456111 | 1742 | .proc_handler = proc_dointvec, |
1da177e4 | 1743 | }, |
bfcd17a6 | 1744 | #endif |
1da177e4 LT |
1745 | #ifdef CONFIG_DNOTIFY |
1746 | { | |
1da177e4 LT |
1747 | .procname = "dir-notify-enable", |
1748 | .data = &dir_notify_enable, | |
1749 | .maxlen = sizeof(int), | |
1750 | .mode = 0644, | |
6d456111 | 1751 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1752 | }, |
1753 | #endif | |
1754 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1755 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1756 | { |
1da177e4 LT |
1757 | .procname = "lease-break-time", |
1758 | .data = &lease_break_time, | |
1759 | .maxlen = sizeof(int), | |
1760 | .mode = 0644, | |
6d456111 | 1761 | .proc_handler = proc_dointvec, |
1da177e4 | 1762 | }, |
bfcd17a6 | 1763 | #endif |
ebf3f09c | 1764 | #ifdef CONFIG_AIO |
1da177e4 | 1765 | { |
1da177e4 LT |
1766 | .procname = "aio-nr", |
1767 | .data = &aio_nr, | |
1768 | .maxlen = sizeof(aio_nr), | |
1769 | .mode = 0444, | |
6d456111 | 1770 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1771 | }, |
1772 | { | |
1da177e4 LT |
1773 | .procname = "aio-max-nr", |
1774 | .data = &aio_max_nr, | |
1775 | .maxlen = sizeof(aio_max_nr), | |
1776 | .mode = 0644, | |
6d456111 | 1777 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1778 | }, |
ebf3f09c | 1779 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1780 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1781 | { |
0399cb08 RL |
1782 | .procname = "inotify", |
1783 | .mode = 0555, | |
1784 | .child = inotify_table, | |
1785 | }, | |
1786 | #endif | |
7ef9964e DL |
1787 | #ifdef CONFIG_EPOLL |
1788 | { | |
1789 | .procname = "epoll", | |
1790 | .mode = 0555, | |
1791 | .child = epoll_table, | |
1792 | }, | |
1793 | #endif | |
1da177e4 | 1794 | #endif |
800179c9 KC |
1795 | { |
1796 | .procname = "protected_symlinks", | |
1797 | .data = &sysctl_protected_symlinks, | |
1798 | .maxlen = sizeof(int), | |
1799 | .mode = 0600, | |
1800 | .proc_handler = proc_dointvec_minmax, | |
1801 | .extra1 = &zero, | |
1802 | .extra2 = &one, | |
1803 | }, | |
1804 | { | |
1805 | .procname = "protected_hardlinks", | |
1806 | .data = &sysctl_protected_hardlinks, | |
1807 | .maxlen = sizeof(int), | |
1808 | .mode = 0600, | |
1809 | .proc_handler = proc_dointvec_minmax, | |
1810 | .extra1 = &zero, | |
1811 | .extra2 = &one, | |
1812 | }, | |
d6e71144 | 1813 | { |
d6e71144 AC |
1814 | .procname = "suid_dumpable", |
1815 | .data = &suid_dumpable, | |
1816 | .maxlen = sizeof(int), | |
1817 | .mode = 0644, | |
54b50199 | 1818 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1819 | .extra1 = &zero, |
1820 | .extra2 = &two, | |
d6e71144 | 1821 | }, |
2abc26fc EB |
1822 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1823 | { | |
2abc26fc EB |
1824 | .procname = "binfmt_misc", |
1825 | .mode = 0555, | |
f9bd6733 | 1826 | .child = sysctl_mount_point, |
2abc26fc EB |
1827 | }, |
1828 | #endif | |
b492e95b | 1829 | { |
ff9da691 JA |
1830 | .procname = "pipe-max-size", |
1831 | .data = &pipe_max_size, | |
98159d97 | 1832 | .maxlen = sizeof(pipe_max_size), |
b492e95b | 1833 | .mode = 0644, |
ff9da691 JA |
1834 | .proc_handler = &pipe_proc_fn, |
1835 | .extra1 = &pipe_min_size, | |
b492e95b | 1836 | }, |
759c0114 WT |
1837 | { |
1838 | .procname = "pipe-user-pages-hard", | |
1839 | .data = &pipe_user_pages_hard, | |
1840 | .maxlen = sizeof(pipe_user_pages_hard), | |
1841 | .mode = 0644, | |
1842 | .proc_handler = proc_doulongvec_minmax, | |
1843 | }, | |
1844 | { | |
1845 | .procname = "pipe-user-pages-soft", | |
1846 | .data = &pipe_user_pages_soft, | |
1847 | .maxlen = sizeof(pipe_user_pages_soft), | |
1848 | .mode = 0644, | |
1849 | .proc_handler = proc_doulongvec_minmax, | |
1850 | }, | |
d2921684 EB |
1851 | { |
1852 | .procname = "mount-max", | |
1853 | .data = &sysctl_mount_max, | |
1854 | .maxlen = sizeof(unsigned int), | |
1855 | .mode = 0644, | |
1856 | .proc_handler = proc_dointvec_minmax, | |
1857 | .extra1 = &one, | |
1858 | }, | |
6fce56ec | 1859 | { } |
1da177e4 LT |
1860 | }; |
1861 | ||
d8217f07 | 1862 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1863 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1864 | { |
abd4f750 MAS |
1865 | .procname = "exception-trace", |
1866 | .data = &show_unhandled_signals, | |
1867 | .maxlen = sizeof(int), | |
1868 | .mode = 0644, | |
1869 | .proc_handler = proc_dointvec | |
1870 | }, | |
b2be84df MH |
1871 | #endif |
1872 | #if defined(CONFIG_OPTPROBES) | |
1873 | { | |
1874 | .procname = "kprobes-optimization", | |
1875 | .data = &sysctl_kprobes_optimization, | |
1876 | .maxlen = sizeof(int), | |
1877 | .mode = 0644, | |
1878 | .proc_handler = proc_kprobes_optimization_handler, | |
1879 | .extra1 = &zero, | |
1880 | .extra2 = &one, | |
1881 | }, | |
abd4f750 | 1882 | #endif |
6fce56ec | 1883 | { } |
1da177e4 LT |
1884 | }; |
1885 | ||
d8217f07 | 1886 | static struct ctl_table dev_table[] = { |
6fce56ec | 1887 | { } |
0eeca283 | 1888 | }; |
1da177e4 | 1889 | |
de4e83bd | 1890 | int __init sysctl_init(void) |
d912b0cc | 1891 | { |
fd4b616b SR |
1892 | struct ctl_table_header *hdr; |
1893 | ||
1894 | hdr = register_sysctl_table(sysctl_base_table); | |
1895 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1896 | return 0; |
1897 | } | |
1898 | ||
b89a8171 EB |
1899 | #endif /* CONFIG_SYSCTL */ |
1900 | ||
1da177e4 LT |
1901 | /* |
1902 | * /proc/sys support | |
1903 | */ | |
1904 | ||
b89a8171 | 1905 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1906 | |
f8808300 KC |
1907 | static int _proc_do_string(char *data, int maxlen, int write, |
1908 | char __user *buffer, | |
b1ba4ddd | 1909 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1910 | { |
1911 | size_t len; | |
1912 | char __user *p; | |
1913 | char c; | |
8d060877 ON |
1914 | |
1915 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1916 | *lenp = 0; |
1917 | return 0; | |
1918 | } | |
8d060877 | 1919 | |
1da177e4 | 1920 | if (write) { |
f4aacea2 KC |
1921 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1922 | /* Only continue writes not past the end of buffer. */ | |
1923 | len = strlen(data); | |
1924 | if (len > maxlen - 1) | |
1925 | len = maxlen - 1; | |
1926 | ||
1927 | if (*ppos > len) | |
1928 | return 0; | |
1929 | len = *ppos; | |
1930 | } else { | |
1931 | /* Start writing from beginning of buffer. */ | |
1932 | len = 0; | |
1933 | } | |
1934 | ||
2ca9bb45 | 1935 | *ppos += *lenp; |
1da177e4 | 1936 | p = buffer; |
2ca9bb45 | 1937 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
1938 | if (get_user(c, p++)) |
1939 | return -EFAULT; | |
1940 | if (c == 0 || c == '\n') | |
1941 | break; | |
2ca9bb45 | 1942 | data[len++] = c; |
1da177e4 | 1943 | } |
f8808300 | 1944 | data[len] = 0; |
1da177e4 | 1945 | } else { |
f5dd3d6f SV |
1946 | len = strlen(data); |
1947 | if (len > maxlen) | |
1948 | len = maxlen; | |
8d060877 ON |
1949 | |
1950 | if (*ppos > len) { | |
1951 | *lenp = 0; | |
1952 | return 0; | |
1953 | } | |
1954 | ||
1955 | data += *ppos; | |
1956 | len -= *ppos; | |
1957 | ||
1da177e4 LT |
1958 | if (len > *lenp) |
1959 | len = *lenp; | |
1960 | if (len) | |
f8808300 | 1961 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
1962 | return -EFAULT; |
1963 | if (len < *lenp) { | |
f8808300 | 1964 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
1965 | return -EFAULT; |
1966 | len++; | |
1967 | } | |
1968 | *lenp = len; | |
1969 | *ppos += len; | |
1970 | } | |
1971 | return 0; | |
1972 | } | |
1973 | ||
f4aacea2 KC |
1974 | static void warn_sysctl_write(struct ctl_table *table) |
1975 | { | |
1976 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
1977 | "This will not be supported in the future. To silence this\n" | |
1978 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
1979 | current->comm, table->procname); | |
1980 | } | |
1981 | ||
d383d484 LR |
1982 | /** |
1983 | * proc_first_pos_non_zero_ignore - check if firs position is allowed | |
1984 | * @ppos: file position | |
1985 | * @table: the sysctl table | |
1986 | * | |
1987 | * Returns true if the first position is non-zero and the sysctl_writes_strict | |
1988 | * mode indicates this is not allowed for numeric input types. String proc | |
1989 | * hadlers can ignore the return value. | |
1990 | */ | |
1991 | static bool proc_first_pos_non_zero_ignore(loff_t *ppos, | |
1992 | struct ctl_table *table) | |
1993 | { | |
1994 | if (!*ppos) | |
1995 | return false; | |
1996 | ||
1997 | switch (sysctl_writes_strict) { | |
1998 | case SYSCTL_WRITES_STRICT: | |
1999 | return true; | |
2000 | case SYSCTL_WRITES_WARN: | |
2001 | warn_sysctl_write(table); | |
2002 | return false; | |
2003 | default: | |
2004 | return false; | |
2005 | } | |
2006 | } | |
2007 | ||
f5dd3d6f SV |
2008 | /** |
2009 | * proc_dostring - read a string sysctl | |
2010 | * @table: the sysctl table | |
2011 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
2012 | * @buffer: the user buffer |
2013 | * @lenp: the size of the user buffer | |
2014 | * @ppos: file position | |
2015 | * | |
2016 | * Reads/writes a string from/to the user buffer. If the kernel | |
2017 | * buffer provided is not large enough to hold the string, the | |
2018 | * string is truncated. The copied string is %NULL-terminated. | |
2019 | * If the string is being read by the user process, it is copied | |
2020 | * and a newline '\n' is added. It is truncated if the buffer is | |
2021 | * not large enough. | |
2022 | * | |
2023 | * Returns 0 on success. | |
2024 | */ | |
8d65af78 | 2025 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2026 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2027 | { | |
d383d484 LR |
2028 | if (write) |
2029 | proc_first_pos_non_zero_ignore(ppos, table); | |
f4aacea2 | 2030 | |
f8808300 KC |
2031 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
2032 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
2033 | } |
2034 | ||
00b7c339 AW |
2035 | static size_t proc_skip_spaces(char **buf) |
2036 | { | |
2037 | size_t ret; | |
2038 | char *tmp = skip_spaces(*buf); | |
2039 | ret = tmp - *buf; | |
2040 | *buf = tmp; | |
2041 | return ret; | |
2042 | } | |
2043 | ||
9f977fb7 OP |
2044 | static void proc_skip_char(char **buf, size_t *size, const char v) |
2045 | { | |
2046 | while (*size) { | |
2047 | if (**buf != v) | |
2048 | break; | |
2049 | (*size)--; | |
2050 | (*buf)++; | |
2051 | } | |
2052 | } | |
2053 | ||
00b7c339 AW |
2054 | #define TMPBUFLEN 22 |
2055 | /** | |
0fc377bd | 2056 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 2057 | * |
0fc377bd RD |
2058 | * @buf: a kernel buffer |
2059 | * @size: size of the kernel buffer | |
2060 | * @val: this is where the number will be stored | |
2061 | * @neg: set to %TRUE if number is negative | |
2062 | * @perm_tr: a vector which contains the allowed trailers | |
2063 | * @perm_tr_len: size of the perm_tr vector | |
2064 | * @tr: pointer to store the trailer character | |
00b7c339 | 2065 | * |
0fc377bd RD |
2066 | * In case of success %0 is returned and @buf and @size are updated with |
2067 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
2068 | * character exists (size is non-zero after returning from this | |
2069 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
2070 | */ |
2071 | static int proc_get_long(char **buf, size_t *size, | |
2072 | unsigned long *val, bool *neg, | |
2073 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
2074 | { | |
2075 | int len; | |
2076 | char *p, tmp[TMPBUFLEN]; | |
2077 | ||
2078 | if (!*size) | |
2079 | return -EINVAL; | |
2080 | ||
2081 | len = *size; | |
2082 | if (len > TMPBUFLEN - 1) | |
2083 | len = TMPBUFLEN - 1; | |
2084 | ||
2085 | memcpy(tmp, *buf, len); | |
2086 | ||
2087 | tmp[len] = 0; | |
2088 | p = tmp; | |
2089 | if (*p == '-' && *size > 1) { | |
2090 | *neg = true; | |
2091 | p++; | |
2092 | } else | |
2093 | *neg = false; | |
2094 | if (!isdigit(*p)) | |
2095 | return -EINVAL; | |
2096 | ||
2097 | *val = simple_strtoul(p, &p, 0); | |
2098 | ||
2099 | len = p - tmp; | |
2100 | ||
2101 | /* We don't know if the next char is whitespace thus we may accept | |
2102 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
2103 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
2104 | if (len == TMPBUFLEN - 1) | |
2105 | return -EINVAL; | |
2106 | ||
2107 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
2108 | return -EINVAL; | |
1da177e4 | 2109 | |
00b7c339 AW |
2110 | if (tr && (len < *size)) |
2111 | *tr = *p; | |
2112 | ||
2113 | *buf += len; | |
2114 | *size -= len; | |
2115 | ||
2116 | return 0; | |
2117 | } | |
2118 | ||
2119 | /** | |
0fc377bd | 2120 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 2121 | * |
0fc377bd RD |
2122 | * @buf: the user buffer |
2123 | * @size: the size of the user buffer | |
2124 | * @val: the integer to be converted | |
2125 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 2126 | * |
0fc377bd RD |
2127 | * In case of success %0 is returned and @buf and @size are updated with |
2128 | * the amount of bytes written. | |
00b7c339 AW |
2129 | */ |
2130 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
2131 | bool neg) | |
2132 | { | |
2133 | int len; | |
2134 | char tmp[TMPBUFLEN], *p = tmp; | |
2135 | ||
2136 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
2137 | len = strlen(tmp); | |
2138 | if (len > *size) | |
2139 | len = *size; | |
2140 | if (copy_to_user(*buf, tmp, len)) | |
2141 | return -EFAULT; | |
2142 | *size -= len; | |
2143 | *buf += len; | |
2144 | return 0; | |
2145 | } | |
2146 | #undef TMPBUFLEN | |
2147 | ||
2148 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
2149 | { | |
2150 | if (*size) { | |
2151 | char __user **buffer = (char __user **)buf; | |
2152 | if (put_user(c, *buffer)) | |
2153 | return -EFAULT; | |
2154 | (*size)--, (*buffer)++; | |
2155 | *buf = *buffer; | |
2156 | } | |
2157 | return 0; | |
2158 | } | |
1da177e4 | 2159 | |
00b7c339 | 2160 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2161 | int *valp, |
2162 | int write, void *data) | |
2163 | { | |
2164 | if (write) { | |
230633d1 HS |
2165 | if (*negp) { |
2166 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
2167 | return -EINVAL; | |
2168 | *valp = -*lvalp; | |
2169 | } else { | |
2170 | if (*lvalp > (unsigned long) INT_MAX) | |
2171 | return -EINVAL; | |
2172 | *valp = *lvalp; | |
2173 | } | |
1da177e4 LT |
2174 | } else { |
2175 | int val = *valp; | |
2176 | if (val < 0) { | |
00b7c339 | 2177 | *negp = true; |
9a5bc726 | 2178 | *lvalp = -(unsigned long)val; |
1da177e4 | 2179 | } else { |
00b7c339 | 2180 | *negp = false; |
1da177e4 LT |
2181 | *lvalp = (unsigned long)val; |
2182 | } | |
2183 | } | |
2184 | return 0; | |
2185 | } | |
2186 | ||
4f2fec00 LR |
2187 | static int do_proc_douintvec_conv(unsigned long *lvalp, |
2188 | unsigned int *valp, | |
2189 | int write, void *data) | |
e7d316a0 SAK |
2190 | { |
2191 | if (write) { | |
425fffd8 LZ |
2192 | if (*lvalp > UINT_MAX) |
2193 | return -EINVAL; | |
e7d316a0 SAK |
2194 | *valp = *lvalp; |
2195 | } else { | |
2196 | unsigned int val = *valp; | |
2197 | *lvalp = (unsigned long)val; | |
2198 | } | |
2199 | return 0; | |
2200 | } | |
2201 | ||
00b7c339 AW |
2202 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
2203 | ||
d8217f07 | 2204 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2205 | int write, void __user *buffer, |
fcfbd547 | 2206 | size_t *lenp, loff_t *ppos, |
00b7c339 | 2207 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
2208 | int write, void *data), |
2209 | void *data) | |
2210 | { | |
00b7c339 | 2211 | int *i, vleft, first = 1, err = 0; |
00b7c339 | 2212 | size_t left; |
70f6cbb6 | 2213 | char *kbuf = NULL, *p; |
1da177e4 | 2214 | |
00b7c339 | 2215 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2216 | *lenp = 0; |
2217 | return 0; | |
2218 | } | |
2219 | ||
fcfbd547 | 2220 | i = (int *) tbl_data; |
1da177e4 LT |
2221 | vleft = table->maxlen / sizeof(*i); |
2222 | left = *lenp; | |
2223 | ||
2224 | if (!conv) | |
2225 | conv = do_proc_dointvec_conv; | |
2226 | ||
00b7c339 | 2227 | if (write) { |
d383d484 LR |
2228 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2229 | goto out; | |
f4aacea2 | 2230 | |
00b7c339 AW |
2231 | if (left > PAGE_SIZE - 1) |
2232 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2233 | p = kbuf = memdup_user_nul(buffer, left); |
2234 | if (IS_ERR(kbuf)) | |
2235 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2236 | } |
2237 | ||
1da177e4 | 2238 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2239 | unsigned long lval; |
2240 | bool neg; | |
1da177e4 | 2241 | |
00b7c339 | 2242 | if (write) { |
70f6cbb6 | 2243 | left -= proc_skip_spaces(&p); |
1da177e4 | 2244 | |
563b0467 O |
2245 | if (!left) |
2246 | break; | |
70f6cbb6 | 2247 | err = proc_get_long(&p, &left, &lval, &neg, |
00b7c339 AW |
2248 | proc_wspace_sep, |
2249 | sizeof(proc_wspace_sep), NULL); | |
2250 | if (err) | |
1da177e4 | 2251 | break; |
00b7c339 AW |
2252 | if (conv(&neg, &lval, i, 1, data)) { |
2253 | err = -EINVAL; | |
1da177e4 | 2254 | break; |
00b7c339 | 2255 | } |
1da177e4 | 2256 | } else { |
00b7c339 AW |
2257 | if (conv(&neg, &lval, i, 0, data)) { |
2258 | err = -EINVAL; | |
2259 | break; | |
2260 | } | |
1da177e4 | 2261 | if (!first) |
00b7c339 AW |
2262 | err = proc_put_char(&buffer, &left, '\t'); |
2263 | if (err) | |
2264 | break; | |
2265 | err = proc_put_long(&buffer, &left, lval, neg); | |
2266 | if (err) | |
1da177e4 | 2267 | break; |
1da177e4 LT |
2268 | } |
2269 | } | |
2270 | ||
00b7c339 AW |
2271 | if (!write && !first && left && !err) |
2272 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2273 | if (write && !err && left) |
70f6cbb6 | 2274 | left -= proc_skip_spaces(&p); |
1da177e4 | 2275 | if (write) { |
70f6cbb6 | 2276 | kfree(kbuf); |
00b7c339 AW |
2277 | if (first) |
2278 | return err ? : -EINVAL; | |
1da177e4 | 2279 | } |
1da177e4 | 2280 | *lenp -= left; |
f4aacea2 | 2281 | out: |
1da177e4 | 2282 | *ppos += *lenp; |
00b7c339 | 2283 | return err; |
1da177e4 LT |
2284 | } |
2285 | ||
8d65af78 | 2286 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2287 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2288 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2289 | int write, void *data), |
2290 | void *data) | |
2291 | { | |
8d65af78 | 2292 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2293 | buffer, lenp, ppos, conv, data); |
2294 | } | |
2295 | ||
4f2fec00 LR |
2296 | static int do_proc_douintvec_w(unsigned int *tbl_data, |
2297 | struct ctl_table *table, | |
2298 | void __user *buffer, | |
2299 | size_t *lenp, loff_t *ppos, | |
2300 | int (*conv)(unsigned long *lvalp, | |
2301 | unsigned int *valp, | |
2302 | int write, void *data), | |
2303 | void *data) | |
2304 | { | |
2305 | unsigned long lval; | |
2306 | int err = 0; | |
2307 | size_t left; | |
2308 | bool neg; | |
2309 | char *kbuf = NULL, *p; | |
2310 | ||
2311 | left = *lenp; | |
2312 | ||
2313 | if (proc_first_pos_non_zero_ignore(ppos, table)) | |
2314 | goto bail_early; | |
2315 | ||
2316 | if (left > PAGE_SIZE - 1) | |
2317 | left = PAGE_SIZE - 1; | |
2318 | ||
2319 | p = kbuf = memdup_user_nul(buffer, left); | |
2320 | if (IS_ERR(kbuf)) | |
2321 | return -EINVAL; | |
2322 | ||
2323 | left -= proc_skip_spaces(&p); | |
2324 | if (!left) { | |
2325 | err = -EINVAL; | |
2326 | goto out_free; | |
2327 | } | |
2328 | ||
2329 | err = proc_get_long(&p, &left, &lval, &neg, | |
2330 | proc_wspace_sep, | |
2331 | sizeof(proc_wspace_sep), NULL); | |
2332 | if (err || neg) { | |
2333 | err = -EINVAL; | |
2334 | goto out_free; | |
2335 | } | |
2336 | ||
2337 | if (conv(&lval, tbl_data, 1, data)) { | |
2338 | err = -EINVAL; | |
2339 | goto out_free; | |
2340 | } | |
2341 | ||
2342 | if (!err && left) | |
2343 | left -= proc_skip_spaces(&p); | |
2344 | ||
2345 | out_free: | |
2346 | kfree(kbuf); | |
2347 | if (err) | |
2348 | return -EINVAL; | |
2349 | ||
2350 | return 0; | |
2351 | ||
2352 | /* This is in keeping with old __do_proc_dointvec() */ | |
2353 | bail_early: | |
2354 | *ppos += *lenp; | |
2355 | return err; | |
2356 | } | |
2357 | ||
2358 | static int do_proc_douintvec_r(unsigned int *tbl_data, void __user *buffer, | |
2359 | size_t *lenp, loff_t *ppos, | |
2360 | int (*conv)(unsigned long *lvalp, | |
2361 | unsigned int *valp, | |
2362 | int write, void *data), | |
2363 | void *data) | |
2364 | { | |
2365 | unsigned long lval; | |
2366 | int err = 0; | |
2367 | size_t left; | |
2368 | ||
2369 | left = *lenp; | |
2370 | ||
2371 | if (conv(&lval, tbl_data, 0, data)) { | |
2372 | err = -EINVAL; | |
2373 | goto out; | |
2374 | } | |
2375 | ||
2376 | err = proc_put_long(&buffer, &left, lval, false); | |
2377 | if (err || !left) | |
2378 | goto out; | |
2379 | ||
2380 | err = proc_put_char(&buffer, &left, '\n'); | |
2381 | ||
2382 | out: | |
2383 | *lenp -= left; | |
2384 | *ppos += *lenp; | |
2385 | ||
2386 | return err; | |
2387 | } | |
2388 | ||
2389 | static int __do_proc_douintvec(void *tbl_data, struct ctl_table *table, | |
2390 | int write, void __user *buffer, | |
2391 | size_t *lenp, loff_t *ppos, | |
2392 | int (*conv)(unsigned long *lvalp, | |
2393 | unsigned int *valp, | |
2394 | int write, void *data), | |
2395 | void *data) | |
2396 | { | |
2397 | unsigned int *i, vleft; | |
2398 | ||
2399 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
2400 | *lenp = 0; | |
2401 | return 0; | |
2402 | } | |
2403 | ||
2404 | i = (unsigned int *) tbl_data; | |
2405 | vleft = table->maxlen / sizeof(*i); | |
2406 | ||
2407 | /* | |
2408 | * Arrays are not supported, keep this simple. *Do not* add | |
2409 | * support for them. | |
2410 | */ | |
2411 | if (vleft != 1) { | |
2412 | *lenp = 0; | |
2413 | return -EINVAL; | |
2414 | } | |
2415 | ||
2416 | if (!conv) | |
2417 | conv = do_proc_douintvec_conv; | |
2418 | ||
2419 | if (write) | |
2420 | return do_proc_douintvec_w(i, table, buffer, lenp, ppos, | |
2421 | conv, data); | |
2422 | return do_proc_douintvec_r(i, buffer, lenp, ppos, conv, data); | |
2423 | } | |
2424 | ||
2425 | static int do_proc_douintvec(struct ctl_table *table, int write, | |
2426 | void __user *buffer, size_t *lenp, loff_t *ppos, | |
2427 | int (*conv)(unsigned long *lvalp, | |
2428 | unsigned int *valp, | |
2429 | int write, void *data), | |
2430 | void *data) | |
2431 | { | |
2432 | return __do_proc_douintvec(table->data, table, write, | |
2433 | buffer, lenp, ppos, conv, data); | |
2434 | } | |
2435 | ||
1da177e4 LT |
2436 | /** |
2437 | * proc_dointvec - read a vector of integers | |
2438 | * @table: the sysctl table | |
2439 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2440 | * @buffer: the user buffer |
2441 | * @lenp: the size of the user buffer | |
2442 | * @ppos: file position | |
2443 | * | |
2444 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2445 | * values from/to the user buffer, treated as an ASCII string. | |
2446 | * | |
2447 | * Returns 0 on success. | |
2448 | */ | |
8d65af78 | 2449 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2450 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2451 | { | |
e7d316a0 SAK |
2452 | return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); |
2453 | } | |
2454 | ||
2455 | /** | |
2456 | * proc_douintvec - read a vector of unsigned integers | |
2457 | * @table: the sysctl table | |
2458 | * @write: %TRUE if this is a write to the sysctl file | |
2459 | * @buffer: the user buffer | |
2460 | * @lenp: the size of the user buffer | |
2461 | * @ppos: file position | |
2462 | * | |
2463 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2464 | * values from/to the user buffer, treated as an ASCII string. | |
2465 | * | |
2466 | * Returns 0 on success. | |
2467 | */ | |
2468 | int proc_douintvec(struct ctl_table *table, int write, | |
2469 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2470 | { | |
4f2fec00 LR |
2471 | return do_proc_douintvec(table, write, buffer, lenp, ppos, |
2472 | do_proc_douintvec_conv, NULL); | |
1da177e4 LT |
2473 | } |
2474 | ||
34f5a398 | 2475 | /* |
25ddbb18 AK |
2476 | * Taint values can only be increased |
2477 | * This means we can safely use a temporary. | |
34f5a398 | 2478 | */ |
8d65af78 | 2479 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2480 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2481 | { | |
25ddbb18 AK |
2482 | struct ctl_table t; |
2483 | unsigned long tmptaint = get_taint(); | |
2484 | int err; | |
34f5a398 | 2485 | |
91fcd412 | 2486 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2487 | return -EPERM; |
2488 | ||
25ddbb18 AK |
2489 | t = *table; |
2490 | t.data = &tmptaint; | |
8d65af78 | 2491 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2492 | if (err < 0) |
2493 | return err; | |
2494 | ||
2495 | if (write) { | |
2496 | /* | |
2497 | * Poor man's atomic or. Not worth adding a primitive | |
2498 | * to everyone's atomic.h for this | |
2499 | */ | |
2500 | int i; | |
2501 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2502 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2503 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2504 | } |
2505 | } | |
2506 | ||
2507 | return err; | |
34f5a398 TT |
2508 | } |
2509 | ||
bfdc0b49 | 2510 | #ifdef CONFIG_PRINTK |
620f6e8e | 2511 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2512 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2513 | { | |
2514 | if (write && !capable(CAP_SYS_ADMIN)) | |
2515 | return -EPERM; | |
2516 | ||
2517 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2518 | } | |
2519 | #endif | |
2520 | ||
1da177e4 LT |
2521 | struct do_proc_dointvec_minmax_conv_param { |
2522 | int *min; | |
2523 | int *max; | |
2524 | }; | |
2525 | ||
00b7c339 AW |
2526 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2527 | int *valp, | |
1da177e4 LT |
2528 | int write, void *data) |
2529 | { | |
2530 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2531 | if (write) { | |
2532 | int val = *negp ? -*lvalp : *lvalp; | |
2533 | if ((param->min && *param->min > val) || | |
2534 | (param->max && *param->max < val)) | |
2535 | return -EINVAL; | |
2536 | *valp = val; | |
2537 | } else { | |
2538 | int val = *valp; | |
2539 | if (val < 0) { | |
00b7c339 | 2540 | *negp = true; |
9a5bc726 | 2541 | *lvalp = -(unsigned long)val; |
1da177e4 | 2542 | } else { |
00b7c339 | 2543 | *negp = false; |
1da177e4 LT |
2544 | *lvalp = (unsigned long)val; |
2545 | } | |
2546 | } | |
2547 | return 0; | |
2548 | } | |
2549 | ||
2550 | /** | |
2551 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2552 | * @table: the sysctl table | |
2553 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2554 | * @buffer: the user buffer |
2555 | * @lenp: the size of the user buffer | |
2556 | * @ppos: file position | |
2557 | * | |
2558 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2559 | * values from/to the user buffer, treated as an ASCII string. | |
2560 | * | |
2561 | * This routine will ensure the values are within the range specified by | |
2562 | * table->extra1 (min) and table->extra2 (max). | |
2563 | * | |
2564 | * Returns 0 on success. | |
2565 | */ | |
8d65af78 | 2566 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2567 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2568 | { | |
2569 | struct do_proc_dointvec_minmax_conv_param param = { | |
2570 | .min = (int *) table->extra1, | |
2571 | .max = (int *) table->extra2, | |
2572 | }; | |
8d65af78 | 2573 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2574 | do_proc_dointvec_minmax_conv, ¶m); |
2575 | } | |
2576 | ||
61d9b56a LR |
2577 | struct do_proc_douintvec_minmax_conv_param { |
2578 | unsigned int *min; | |
2579 | unsigned int *max; | |
2580 | }; | |
2581 | ||
2582 | static int do_proc_douintvec_minmax_conv(unsigned long *lvalp, | |
2583 | unsigned int *valp, | |
2584 | int write, void *data) | |
2585 | { | |
2586 | struct do_proc_douintvec_minmax_conv_param *param = data; | |
2587 | ||
2588 | if (write) { | |
2589 | unsigned int val = *lvalp; | |
2590 | ||
fb910c42 JL |
2591 | if (*lvalp > UINT_MAX) |
2592 | return -EINVAL; | |
2593 | ||
61d9b56a LR |
2594 | if ((param->min && *param->min > val) || |
2595 | (param->max && *param->max < val)) | |
2596 | return -ERANGE; | |
2597 | ||
61d9b56a LR |
2598 | *valp = val; |
2599 | } else { | |
2600 | unsigned int val = *valp; | |
2601 | *lvalp = (unsigned long) val; | |
2602 | } | |
2603 | ||
2604 | return 0; | |
2605 | } | |
2606 | ||
2607 | /** | |
2608 | * proc_douintvec_minmax - read a vector of unsigned ints with min/max values | |
2609 | * @table: the sysctl table | |
2610 | * @write: %TRUE if this is a write to the sysctl file | |
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) unsigned integer | |
2616 | * values from/to the user buffer, treated as an ASCII string. Negative | |
2617 | * strings are not allowed. | |
2618 | * | |
2619 | * This routine will ensure the values are within the range specified by | |
2620 | * table->extra1 (min) and table->extra2 (max). There is a final sanity | |
2621 | * check for UINT_MAX to avoid having to support wrap around uses from | |
2622 | * userspace. | |
2623 | * | |
2624 | * Returns 0 on success. | |
2625 | */ | |
2626 | int proc_douintvec_minmax(struct ctl_table *table, int write, | |
2627 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2628 | { | |
2629 | struct do_proc_douintvec_minmax_conv_param param = { | |
2630 | .min = (unsigned int *) table->extra1, | |
2631 | .max = (unsigned int *) table->extra2, | |
2632 | }; | |
2633 | return do_proc_douintvec(table, write, buffer, lenp, ppos, | |
2634 | do_proc_douintvec_minmax_conv, ¶m); | |
2635 | } | |
2636 | ||
7a8d1819 JL |
2637 | struct do_proc_dopipe_max_size_conv_param { |
2638 | unsigned int *min; | |
2639 | }; | |
2640 | ||
2641 | static int do_proc_dopipe_max_size_conv(unsigned long *lvalp, | |
2642 | unsigned int *valp, | |
2643 | int write, void *data) | |
2644 | { | |
2645 | struct do_proc_dopipe_max_size_conv_param *param = data; | |
2646 | ||
2647 | if (write) { | |
fb910c42 | 2648 | unsigned int val; |
7a8d1819 | 2649 | |
fb910c42 JL |
2650 | if (*lvalp > UINT_MAX) |
2651 | return -EINVAL; | |
2652 | ||
2653 | val = round_pipe_size(*lvalp); | |
7a8d1819 JL |
2654 | if (val == 0) |
2655 | return -EINVAL; | |
2656 | ||
2657 | if (param->min && *param->min > val) | |
2658 | return -ERANGE; | |
2659 | ||
7a8d1819 JL |
2660 | *valp = val; |
2661 | } else { | |
2662 | unsigned int val = *valp; | |
2663 | *lvalp = (unsigned long) val; | |
2664 | } | |
2665 | ||
2666 | return 0; | |
2667 | } | |
2668 | ||
2669 | int proc_dopipe_max_size(struct ctl_table *table, int write, | |
2670 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2671 | { | |
2672 | struct do_proc_dopipe_max_size_conv_param param = { | |
2673 | .min = (unsigned int *) table->extra1, | |
2674 | }; | |
2675 | return do_proc_douintvec(table, write, buffer, lenp, ppos, | |
2676 | do_proc_dopipe_max_size_conv, ¶m); | |
2677 | } | |
2678 | ||
54b50199 KC |
2679 | static void validate_coredump_safety(void) |
2680 | { | |
046d662f | 2681 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2682 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 | 2683 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
760c6a91 AD |
2684 | printk(KERN_WARNING |
2685 | "Unsafe core_pattern used with fs.suid_dumpable=2.\n" | |
2686 | "Pipe handler or fully qualified core dump path required.\n" | |
2687 | "Set kernel.core_pattern before fs.suid_dumpable.\n" | |
2688 | ); | |
54b50199 | 2689 | } |
046d662f | 2690 | #endif |
54b50199 KC |
2691 | } |
2692 | ||
2693 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2694 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2695 | { | |
2696 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2697 | if (!error) | |
2698 | validate_coredump_safety(); | |
2699 | return error; | |
2700 | } | |
2701 | ||
046d662f | 2702 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2703 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2704 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2705 | { | |
2706 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2707 | if (!error) | |
2708 | validate_coredump_safety(); | |
2709 | return error; | |
2710 | } | |
046d662f | 2711 | #endif |
54b50199 | 2712 | |
d8217f07 | 2713 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2714 | void __user *buffer, |
2715 | size_t *lenp, loff_t *ppos, | |
2716 | unsigned long convmul, | |
2717 | unsigned long convdiv) | |
2718 | { | |
00b7c339 AW |
2719 | unsigned long *i, *min, *max; |
2720 | int vleft, first = 1, err = 0; | |
00b7c339 | 2721 | size_t left; |
70f6cbb6 | 2722 | char *kbuf = NULL, *p; |
00b7c339 AW |
2723 | |
2724 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2725 | *lenp = 0; |
2726 | return 0; | |
2727 | } | |
00b7c339 | 2728 | |
fcfbd547 | 2729 | i = (unsigned long *) data; |
1da177e4 LT |
2730 | min = (unsigned long *) table->extra1; |
2731 | max = (unsigned long *) table->extra2; | |
2732 | vleft = table->maxlen / sizeof(unsigned long); | |
2733 | left = *lenp; | |
00b7c339 AW |
2734 | |
2735 | if (write) { | |
d383d484 LR |
2736 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2737 | goto out; | |
f4aacea2 | 2738 | |
00b7c339 AW |
2739 | if (left > PAGE_SIZE - 1) |
2740 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2741 | p = kbuf = memdup_user_nul(buffer, left); |
2742 | if (IS_ERR(kbuf)) | |
2743 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2744 | } |
2745 | ||
27b3d80a | 2746 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2747 | unsigned long val; |
2748 | ||
1da177e4 | 2749 | if (write) { |
00b7c339 AW |
2750 | bool neg; |
2751 | ||
70f6cbb6 | 2752 | left -= proc_skip_spaces(&p); |
00b7c339 | 2753 | |
70f6cbb6 | 2754 | err = proc_get_long(&p, &left, &val, &neg, |
00b7c339 AW |
2755 | proc_wspace_sep, |
2756 | sizeof(proc_wspace_sep), NULL); | |
2757 | if (err) | |
1da177e4 LT |
2758 | break; |
2759 | if (neg) | |
1da177e4 | 2760 | continue; |
ff9f8a7c | 2761 | val = convmul * val / convdiv; |
1da177e4 LT |
2762 | if ((min && val < *min) || (max && val > *max)) |
2763 | continue; | |
2764 | *i = val; | |
2765 | } else { | |
00b7c339 | 2766 | val = convdiv * (*i) / convmul; |
7833819d | 2767 | if (!first) { |
00b7c339 | 2768 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2769 | if (err) |
2770 | break; | |
2771 | } | |
00b7c339 AW |
2772 | err = proc_put_long(&buffer, &left, val, false); |
2773 | if (err) | |
2774 | break; | |
1da177e4 LT |
2775 | } |
2776 | } | |
2777 | ||
00b7c339 AW |
2778 | if (!write && !first && left && !err) |
2779 | err = proc_put_char(&buffer, &left, '\n'); | |
2780 | if (write && !err) | |
70f6cbb6 | 2781 | left -= proc_skip_spaces(&p); |
1da177e4 | 2782 | if (write) { |
70f6cbb6 | 2783 | kfree(kbuf); |
00b7c339 AW |
2784 | if (first) |
2785 | return err ? : -EINVAL; | |
1da177e4 | 2786 | } |
1da177e4 | 2787 | *lenp -= left; |
f4aacea2 | 2788 | out: |
1da177e4 | 2789 | *ppos += *lenp; |
00b7c339 | 2790 | return err; |
1da177e4 LT |
2791 | } |
2792 | ||
d8217f07 | 2793 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2794 | void __user *buffer, |
2795 | size_t *lenp, loff_t *ppos, | |
2796 | unsigned long convmul, | |
2797 | unsigned long convdiv) | |
2798 | { | |
2799 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2800 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2801 | } |
2802 | ||
1da177e4 LT |
2803 | /** |
2804 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2805 | * @table: the sysctl table | |
2806 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2807 | * @buffer: the user buffer |
2808 | * @lenp: the size of the user buffer | |
2809 | * @ppos: file position | |
2810 | * | |
2811 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2812 | * values from/to the user buffer, treated as an ASCII string. | |
2813 | * | |
2814 | * This routine will ensure the values are within the range specified by | |
2815 | * table->extra1 (min) and table->extra2 (max). | |
2816 | * | |
2817 | * Returns 0 on success. | |
2818 | */ | |
8d65af78 | 2819 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2820 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2821 | { | |
8d65af78 | 2822 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2823 | } |
2824 | ||
2825 | /** | |
2826 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2827 | * @table: the sysctl table | |
2828 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2829 | * @buffer: the user buffer |
2830 | * @lenp: the size of the user buffer | |
2831 | * @ppos: file position | |
2832 | * | |
2833 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2834 | * values from/to the user buffer, treated as an ASCII string. The values | |
2835 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2836 | * | |
2837 | * This routine will ensure the values are within the range specified by | |
2838 | * table->extra1 (min) and table->extra2 (max). | |
2839 | * | |
2840 | * Returns 0 on success. | |
2841 | */ | |
d8217f07 | 2842 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2843 | void __user *buffer, |
2844 | size_t *lenp, loff_t *ppos) | |
2845 | { | |
8d65af78 | 2846 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2847 | lenp, ppos, HZ, 1000l); |
2848 | } | |
2849 | ||
2850 | ||
00b7c339 | 2851 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2852 | int *valp, |
2853 | int write, void *data) | |
2854 | { | |
2855 | if (write) { | |
63259457 | 2856 | if (*lvalp > INT_MAX / HZ) |
cba9f33d | 2857 | return 1; |
1da177e4 LT |
2858 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2859 | } else { | |
2860 | int val = *valp; | |
2861 | unsigned long lval; | |
2862 | if (val < 0) { | |
00b7c339 | 2863 | *negp = true; |
9a5bc726 | 2864 | lval = -(unsigned long)val; |
1da177e4 | 2865 | } else { |
00b7c339 | 2866 | *negp = false; |
1da177e4 LT |
2867 | lval = (unsigned long)val; |
2868 | } | |
2869 | *lvalp = lval / HZ; | |
2870 | } | |
2871 | return 0; | |
2872 | } | |
2873 | ||
00b7c339 | 2874 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2875 | int *valp, |
2876 | int write, void *data) | |
2877 | { | |
2878 | if (write) { | |
cba9f33d BS |
2879 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2880 | return 1; | |
1da177e4 LT |
2881 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2882 | } else { | |
2883 | int val = *valp; | |
2884 | unsigned long lval; | |
2885 | if (val < 0) { | |
00b7c339 | 2886 | *negp = true; |
9a5bc726 | 2887 | lval = -(unsigned long)val; |
1da177e4 | 2888 | } else { |
00b7c339 | 2889 | *negp = false; |
1da177e4 LT |
2890 | lval = (unsigned long)val; |
2891 | } | |
2892 | *lvalp = jiffies_to_clock_t(lval); | |
2893 | } | |
2894 | return 0; | |
2895 | } | |
2896 | ||
00b7c339 | 2897 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2898 | int *valp, |
2899 | int write, void *data) | |
2900 | { | |
2901 | if (write) { | |
d738ce8f FF |
2902 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2903 | ||
2904 | if (jif > INT_MAX) | |
2905 | return 1; | |
2906 | *valp = (int)jif; | |
1da177e4 LT |
2907 | } else { |
2908 | int val = *valp; | |
2909 | unsigned long lval; | |
2910 | if (val < 0) { | |
00b7c339 | 2911 | *negp = true; |
9a5bc726 | 2912 | lval = -(unsigned long)val; |
1da177e4 | 2913 | } else { |
00b7c339 | 2914 | *negp = false; |
1da177e4 LT |
2915 | lval = (unsigned long)val; |
2916 | } | |
2917 | *lvalp = jiffies_to_msecs(lval); | |
2918 | } | |
2919 | return 0; | |
2920 | } | |
2921 | ||
2922 | /** | |
2923 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2924 | * @table: the sysctl table | |
2925 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2926 | * @buffer: the user buffer |
2927 | * @lenp: the size of the user buffer | |
2928 | * @ppos: file position | |
2929 | * | |
2930 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2931 | * values from/to the user buffer, treated as an ASCII string. | |
2932 | * The values read are assumed to be in seconds, and are converted into | |
2933 | * jiffies. | |
2934 | * | |
2935 | * Returns 0 on success. | |
2936 | */ | |
8d65af78 | 2937 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2938 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2939 | { | |
8d65af78 | 2940 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2941 | do_proc_dointvec_jiffies_conv,NULL); |
2942 | } | |
2943 | ||
2944 | /** | |
2945 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2946 | * @table: the sysctl table | |
2947 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2948 | * @buffer: the user buffer |
2949 | * @lenp: the size of the user buffer | |
1e5d5331 | 2950 | * @ppos: pointer to the file position |
1da177e4 LT |
2951 | * |
2952 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2953 | * values from/to the user buffer, treated as an ASCII string. | |
2954 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2955 | * are converted into jiffies. | |
2956 | * | |
2957 | * Returns 0 on success. | |
2958 | */ | |
8d65af78 | 2959 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2960 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2961 | { | |
8d65af78 | 2962 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2963 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2964 | } | |
2965 | ||
2966 | /** | |
2967 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2968 | * @table: the sysctl table | |
2969 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2970 | * @buffer: the user buffer |
2971 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2972 | * @ppos: file position |
2973 | * @ppos: the current position in the file | |
1da177e4 LT |
2974 | * |
2975 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2976 | * values from/to the user buffer, treated as an ASCII string. | |
2977 | * The values read are assumed to be in 1/1000 seconds, and | |
2978 | * are converted into jiffies. | |
2979 | * | |
2980 | * Returns 0 on success. | |
2981 | */ | |
8d65af78 | 2982 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2983 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2984 | { | |
8d65af78 | 2985 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2986 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2987 | } | |
2988 | ||
8d65af78 | 2989 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2990 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2991 | { | |
2992 | struct pid *new_pid; | |
2993 | pid_t tmp; | |
2994 | int r; | |
2995 | ||
6c5f3e7b | 2996 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2997 | |
8d65af78 | 2998 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2999 | lenp, ppos, NULL, NULL); |
3000 | if (r || !write) | |
3001 | return r; | |
3002 | ||
3003 | new_pid = find_get_pid(tmp); | |
3004 | if (!new_pid) | |
3005 | return -ESRCH; | |
3006 | ||
3007 | put_pid(xchg(&cad_pid, new_pid)); | |
3008 | return 0; | |
3009 | } | |
3010 | ||
9f977fb7 OP |
3011 | /** |
3012 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
3013 | * @table: the sysctl table | |
3014 | * @write: %TRUE if this is a write to the sysctl file | |
3015 | * @buffer: the user buffer | |
3016 | * @lenp: the size of the user buffer | |
3017 | * @ppos: file position | |
3018 | * | |
3019 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
3020 | * in table->maxlen. | |
3021 | * | |
3022 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
3023 | * large bitmaps may be represented in a compact manner. Writing into | |
3024 | * the file will clear the bitmap then update it with the given input. | |
3025 | * | |
3026 | * Returns 0 on success. | |
3027 | */ | |
3028 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
3029 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3030 | { | |
3031 | int err = 0; | |
3032 | bool first = 1; | |
3033 | size_t left = *lenp; | |
3034 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 3035 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
3036 | unsigned long *tmp_bitmap = NULL; |
3037 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
3038 | ||
122ff243 | 3039 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
3040 | *lenp = 0; |
3041 | return 0; | |
3042 | } | |
3043 | ||
3044 | if (write) { | |
70f6cbb6 | 3045 | char *kbuf, *p; |
9f977fb7 OP |
3046 | |
3047 | if (left > PAGE_SIZE - 1) | |
3048 | left = PAGE_SIZE - 1; | |
3049 | ||
70f6cbb6 AV |
3050 | p = kbuf = memdup_user_nul(buffer, left); |
3051 | if (IS_ERR(kbuf)) | |
3052 | return PTR_ERR(kbuf); | |
9f977fb7 OP |
3053 | |
3054 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
3055 | GFP_KERNEL); | |
3056 | if (!tmp_bitmap) { | |
70f6cbb6 | 3057 | kfree(kbuf); |
9f977fb7 OP |
3058 | return -ENOMEM; |
3059 | } | |
70f6cbb6 | 3060 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 OP |
3061 | while (!err && left) { |
3062 | unsigned long val_a, val_b; | |
3063 | bool neg; | |
3064 | ||
70f6cbb6 | 3065 | err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
9f977fb7 OP |
3066 | sizeof(tr_a), &c); |
3067 | if (err) | |
3068 | break; | |
3069 | if (val_a >= bitmap_len || neg) { | |
3070 | err = -EINVAL; | |
3071 | break; | |
3072 | } | |
3073 | ||
3074 | val_b = val_a; | |
3075 | if (left) { | |
70f6cbb6 | 3076 | p++; |
9f977fb7 OP |
3077 | left--; |
3078 | } | |
3079 | ||
3080 | if (c == '-') { | |
70f6cbb6 | 3081 | err = proc_get_long(&p, &left, &val_b, |
9f977fb7 OP |
3082 | &neg, tr_b, sizeof(tr_b), |
3083 | &c); | |
3084 | if (err) | |
3085 | break; | |
3086 | if (val_b >= bitmap_len || neg || | |
3087 | val_a > val_b) { | |
3088 | err = -EINVAL; | |
3089 | break; | |
3090 | } | |
3091 | if (left) { | |
70f6cbb6 | 3092 | p++; |
9f977fb7 OP |
3093 | left--; |
3094 | } | |
3095 | } | |
3096 | ||
5a04cca6 | 3097 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 | 3098 | first = 0; |
70f6cbb6 | 3099 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 | 3100 | } |
70f6cbb6 | 3101 | kfree(kbuf); |
9f977fb7 OP |
3102 | } else { |
3103 | unsigned long bit_a, bit_b = 0; | |
3104 | ||
3105 | while (left) { | |
3106 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
3107 | if (bit_a >= bitmap_len) | |
3108 | break; | |
3109 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
3110 | bit_a + 1) - 1; | |
3111 | ||
3112 | if (!first) { | |
3113 | err = proc_put_char(&buffer, &left, ','); | |
3114 | if (err) | |
3115 | break; | |
3116 | } | |
3117 | err = proc_put_long(&buffer, &left, bit_a, false); | |
3118 | if (err) | |
3119 | break; | |
3120 | if (bit_a != bit_b) { | |
3121 | err = proc_put_char(&buffer, &left, '-'); | |
3122 | if (err) | |
3123 | break; | |
3124 | err = proc_put_long(&buffer, &left, bit_b, false); | |
3125 | if (err) | |
3126 | break; | |
3127 | } | |
3128 | ||
3129 | first = 0; bit_b++; | |
3130 | } | |
3131 | if (!err) | |
3132 | err = proc_put_char(&buffer, &left, '\n'); | |
3133 | } | |
3134 | ||
3135 | if (!err) { | |
3136 | if (write) { | |
3137 | if (*ppos) | |
3138 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
3139 | else | |
5a04cca6 | 3140 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 | 3141 | } |
9f977fb7 OP |
3142 | *lenp -= left; |
3143 | *ppos += *lenp; | |
9f977fb7 | 3144 | } |
f9eb2fdd OK |
3145 | |
3146 | kfree(tmp_bitmap); | |
3147 | return err; | |
9f977fb7 OP |
3148 | } |
3149 | ||
55610500 | 3150 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3151 | |
8d65af78 | 3152 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
3153 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3154 | { | |
3155 | return -ENOSYS; | |
3156 | } | |
3157 | ||
8d65af78 | 3158 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 3159 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
3160 | { |
3161 | return -ENOSYS; | |
3162 | } | |
3163 | ||
e7d316a0 SAK |
3164 | int proc_douintvec(struct ctl_table *table, int write, |
3165 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3166 | { | |
3167 | return -ENOSYS; | |
3168 | } | |
3169 | ||
8d65af78 | 3170 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3171 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3172 | { | |
3173 | return -ENOSYS; | |
3174 | } | |
3175 | ||
61d9b56a LR |
3176 | int proc_douintvec_minmax(struct ctl_table *table, int write, |
3177 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3178 | { | |
3179 | return -ENOSYS; | |
3180 | } | |
3181 | ||
7a8d1819 JL |
3182 | int proc_dopipe_max_size(struct ctl_table *table, int write, |
3183 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3184 | { | |
3185 | return -ENOSYS; | |
3186 | } | |
3187 | ||
8d65af78 | 3188 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3189 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3190 | { | |
3191 | return -ENOSYS; | |
3192 | } | |
3193 | ||
8d65af78 | 3194 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3195 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3196 | { | |
3197 | return -ENOSYS; | |
3198 | } | |
3199 | ||
8d65af78 | 3200 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3201 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3202 | { | |
3203 | return -ENOSYS; | |
3204 | } | |
3205 | ||
8d65af78 | 3206 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3207 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3208 | { | |
3209 | return -ENOSYS; | |
3210 | } | |
3211 | ||
d8217f07 | 3212 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3213 | void __user *buffer, |
3214 | size_t *lenp, loff_t *ppos) | |
3215 | { | |
3216 | return -ENOSYS; | |
3217 | } | |
3218 | ||
3219 | ||
55610500 | 3220 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3221 | |
1da177e4 LT |
3222 | /* |
3223 | * No sense putting this after each symbol definition, twice, | |
3224 | * exception granted :-) | |
3225 | */ | |
3226 | EXPORT_SYMBOL(proc_dointvec); | |
e7d316a0 | 3227 | EXPORT_SYMBOL(proc_douintvec); |
1da177e4 LT |
3228 | EXPORT_SYMBOL(proc_dointvec_jiffies); |
3229 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
61d9b56a | 3230 | EXPORT_SYMBOL_GPL(proc_douintvec_minmax); |
7a8d1819 | 3231 | EXPORT_SYMBOL_GPL(proc_dopipe_max_size); |
1da177e4 LT |
3232 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); |
3233 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
3234 | EXPORT_SYMBOL(proc_dostring); | |
3235 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
3236 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |